Document the CLI and the cycle pre-check

Covers the four subcommands, which encoding is the live one and why
(unifyFinal.lp, not unifyDiss.lp), and the reasoning behind the pre-check.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_015GFjH5RecLNshbBUac66yz

README-bug1-fix.md

@@ -0,0 +1,275 @@
+# Fix for ASP Bug 1 — solutions could violate a placeholder's upper bounds
+
+Fixes the bug logged as **Bug 1** in `../ASP_BUGS.md`. One rule was added to
+`src/main/asp/unifyDiss.lp`; nothing else in the repository was changed.
+
+---
+
+## The bug
+
+`unifyDiss.lp` could solve a placeholder with a type that violates that placeholder's own upper
+bounds — most visibly `java.lang.Object`, which the S-Object rules add as an upper bound for
+*every* placeholder.
+
+Minimal reproduction, self-contained (no `gen-facts` run needed — this is exactly what
+`gen-facts` emits for `_a <. java.lang.Boolean,` plus the one relevant `jdkHierarchy.lp` fact):
+
+```prolog
+% repro_bug1.lp
+orCons(undCons(subcons(tph("_a"),type("java.lang.Boolean",null)), null), null).
+subtype(type("java.lang.Boolean",null), type("java.lang.Object",null)).
+```
+
+```sh
+clingo -n 0 repro_bug1.lp src/main/asp/unifyDiss.lp src/main/asp/show.lp
+```
+
+Before the fix — three answer sets, two of them wrong:
+
+```
+Answer: 1   sigma(tph("_a"),type("java.lang.Object",null))
+Answer: 2   sigma(tph("_a"),type("java.lang.Boolean",null))
+Answer: 3   sigma(tph("_a"),type("java.lang.Boolean",null)) sigma(tph("_a"),type("java.lang.Object",null))
+```
+
+`java.lang.Object` is not a subtype of `java.lang.Boolean`, so Answer 1 violates the only input
+constraint — and since `pipeline.sh` runs `clingo -n 1`, that was the answer the pipeline used.
+
+The or-constraint variant, where two placeholders must land on the *same* alternative:
+
+```prolog
+% repro_bug1b.lp
+% { _a <. java.lang.Byte, _b <. java.lang.Byte | _a <. java.lang.Integer, _b <. java.lang.Integer }
+orCons(undCons(subcons(tph("_b"),type("java.lang.Byte",null)),undCons(subcons(tph("_a"),type("java.lang.Byte",null)), null)),orCons(undCons(subcons(tph("_b"),type("java.lang.Integer",null)),undCons(subcons(tph("_a"),type("java.lang.Integer",null)), null)), null)).
+subtype(type("java.lang.Byte",null),    type("java.lang.Number",null)).
+subtype(type("java.lang.Integer",null), type("java.lang.Number",null)).
+subtype(type("java.lang.Number",null),  type("java.lang.Object",null)).
+```
+
+Before the fix, 18 answer sets; the first was
+`sigma(tph("_a"),…Integer) sigma(tph("_b"),…Object)` — `_b` outside both alternatives.
+
+---
+
+## Root cause
+
+Not a missing check on the *solution*, but a missing check on the *constraints*.
+
+Once `Solution-Gen` assigns a type to a placeholder, `subst` and the `subst-L` / `subst-R` rules
+rewrite every constraint mentioning that placeholder into a constraint over the substituted
+types. Inspecting the bad model shows the violated constraint is already sitting in it:
+
+```
+subst(tph("_a"), type("java.lang.Object",null))                           % the chosen solution
+subcons(tph("_a"), type("java.lang.Boolean",null))                        % the input constraint
+subcons(type("java.lang.Object",null), type("java.lang.Boolean",null))    % <- derived by subst-L
+```
+
+That last atom says `Object <. Boolean`. It contains no placeholders, so it is decidable against
+the class hierarchy, and it is plainly false — but `unifyDiss.lp` had **no fail conditions at
+all**, so nothing ever looked at it. The sibling encodings do have this check
+(`unify.lp:118`, `unifyOrCons.lp:124`, `unifyPaper.lp:126`, all `% fail for adapt`);
+`unifyDiss.lp` was missing that whole section.
+
+### Matches the dissertation
+
+`../dissertation/chapters/unifyWithASP.tex:723` defines the rule:
+
+> **Fail-Subtype**: `G₁ <. G₂`, `G₁ ≮: G₂` ⟹ ∅
+
+and line 867 states the ground-only restriction explicitly:
+
+> *"**Fail-Subtype** rejects any stable model containing a ground subtype constraint `G₁ <. G₂`
+> where `G₁ ≮: G₂` in the Java class hierarchy […] Crucially, both rules only apply to*
+> ground *types `G` — types containing no placeholders. This is intentional: a constraint such as
+> `Box<a> ≐ Box<b>` cannot be validated until `a` and `b` are assigned concrete types."*
+
+Line 946 adds that this restriction is what `Solution-Requirement` exists for: every placeholder
+must be assigned a type, otherwise a constraint could stay non-ground and dodge the check.
+
+---
+
+## The fix
+
+Added to `src/main/asp/unifyDiss.lp`, directly after `Solution-Requirement`:
+
+```prolog
+ :- subcons(S, T), groundType(S), groundType(T), not subtype(S, T).
+
+groundType(T) :- typeTerm(T), not containsTph(T).
+% + containsTph/1 (recursive over params/1..3) and typeTerm/1 (every type term occurring in a
+%   constraint, including those nested in type parameters)
+```
+
+Notes on the shape of the rule:
+
+- **Ground-only is required for soundness, not an optimisation.** A constraint still containing a
+  placeholder is not yet decided and must remain satisfiable by a later substitution.
+- **The subtype relation is not weakened.** The check uses `subtype/2` as-is, on whole type terms,
+  so a parameterized type still only conforms to a bound with the very same parameters. An
+  erasure-level variant (comparing class names only, as `unifyPaper.lp`'s `namedSubtype/2` does)
+  was deliberately *not* used, since it would let `Box<Integer>` satisfy a `Box<String>` bound.
+- **The hierarchy must now be complete enough.** Because the check is only as good as `subtype/2`,
+  a type mentioned in no `subtype/2` fact at all has no derivable `T <: T` and its constraints
+  become unsatisfiable. Running `repro_bug1.lp` *without* `jdkHierarchy.lp` is UNSAT, where it
+  previously returned (wrong) answers. `pipeline.sh` always passes `jdkHierarchy.lp`, so this only
+  affects callers that invoke clingo directly — and failing loudly beats answering wrongly.
+
+---
+
+## Verification
+
+### The reported cases
+
+| Input | Before | After |
+|---|---|---|
+| `repro_bug1.lp` | 3 models, incl. `Object` and a double-`sigma` one | **1 model**, `java.lang.Boolean` |
+| `repro_bug1b.lp` | 18 models, first one invalid | **2 models**: both `Byte`, or both `Integer` |
+
+Both match the "Expected" in `../ASP_BUGS.md` exactly.
+
+### Regression suite
+
+All 37 `.java` files under
+`../JavaConstraintGenerator/src/test/resources/java-samples/testinput/`, each run through
+`gen-facts` and then `clingo -n 1 … unifyDiss.lp jdkHierarchy.lp show.lp`:
+
+| | Before | After |
+|---|---|---|
+| SAT | 33 | 32 |
+| UNSAT | 4 | 5 |
+
+The 4 pre-existing UNSATs (3× `MethodReference`, 1× `TypeParameter`) are Bug 3 and are unchanged.
+The one new UNSAT is `WholeProject/Matrix.java` — see below.
+
+Seven samples (excluding Matrix) produce a different model. The real-world effects named in
+`../ASP_BUGS.md` are fixed:
+
+| Sample | Before | After |
+|---|---|---|
+| `ControlFlow/IfExample` | `_0 = Object` (javac rejects as `if` condition) | `_0 = Boolean` |
+| `ControlFlow/WhileExample` | `_0 = Object` | `_0 = Boolean` |
+| `EqualityExpression/EqualityIntInt` | `_0 = Byte`, `_1 = Object` (mixed alternatives) | both `Object` — one alternative |
+| `EqualityExpression/EqualityBoolean` | `_0` had **two** sigmas (`Byte` *and* `Object`) | single sigma per placeholder |
+| `RelationalExpression/RelationalIntInt` | `_0 = Double`, `_1 = Object` | both `Double` |
+
+Note the fix constrains *validity*, not *minimality* — it removes invalid models but does not
+make clingo prefer the tightest type. In `MethodCall/StringResultAsParameter` the first model
+changed from `_0 = String` to `_0 = Object`; both are valid for that constraint set and the
+solved file still compiles. The total number of `Object`-typed placeholders across the suite
+barely moves (41 → 40, excluding Matrix); what changes is that the remaining ones are now
+constraint-satisfying.
+
+### End-to-end (`pipeline.sh`, javac before vs. after)
+
+34 single-file samples: 25 compile after solving, 5 UNSAT, 3 negative fixtures that do not
+compile before *or* after (`UnresolvableMethodReference`, `StaticImportUser`,
+`UnresolvableQualifiedChain` — the latter two need their sibling files), and 1 regression
+(`SimpleReturn`, below).
+
+---
+
+## Known fallout — two pre-existing defects the missing check was hiding
+
+Both are outside Bug 1 and are **not** fixed here.
+
+### 1. `WholeProject/Matrix.java` is now UNSAT
+
+Its previous "solution" *was* the bug: nearly every placeholder solved as `java.lang.Object`,
+including `_Matrix_7 <. java.lang.Boolean` solved as `Object`, plus a contradictory double-`sigma`
+for `_Matrix_22`. It only ever looked like a success because the solution applier refuses to write
+`java.lang.Object` into a source file.
+
+The reason no valid solution exists: `Matrix extends Vector<Vector<Integer>>`, but the generator
+emits the extends-relation **raw**, as `Matrix < java.util.Vector` (line 1 of its `.cons`). The
+type argument is lost, so no `subtype(type("Matrix",null), type("java.util.Vector",params(…)))`
+fact exists and the ground constraint `Matrix <. Vector<Object>` cannot be confirmed. Minimizing
+the number of violated ground constraints gives an irreducible core of 3, all against the same
+bound `java.util.Vector<java.lang.Object>`.
+
+This is a `JavaConstraintGenerator` issue — the type argument never reaches the `.cons` file — and
+is unaffected by how `JavaTypeUnifyASP` encodes extends relations (verified: the result is
+identical either way).
+
+### 2. `Return/SimpleReturn.java` — solved output no longer compiles
+
+The new model is *valid for the constraint set given*: it selects the string-concatenation
+alternative of the `+` or-constraint (`_0 <. String, Integer <. Integer, String <. _3`), yielding
+`Integer compute(java.lang.String x)`, which javac rejects at `return y;`.
+
+The constraint set is incomplete: `_SimpleReturn_3` has **no** upper bound at all. The method's
+declared return type `Integer` stays literal rather than becoming a placeholder, and the generator
+emits no `_SimpleReturn_3 <. java.lang.Integer` for `return y;`. (Contrast `Return/MultipleReturns`
+and `Return/StringLiteralReturn`, where the return type *is* a placeholder and the returned value
+flows in as a lower bound.) Previously the solver's invalid all-`Object` model happened to compile;
+now a valid model exposes the missing constraint. Fixing this belongs in
+`JavaConstraintGenerator`.
+
+### Not a gap: `subtype/2` and parameterized types
+
+While measuring the above, `_a <. java.util.Vector<java.lang.Integer>` appeared to go UNSAT under
+Fail-Subtype, suggesting `subtype/2` could not relate parameterized types at all. That was an
+artifact of an **uncommitted local change** to `ASPGenerator.generateExtendsRelations`, which
+emitted each extends relation as a bare fact
+
+```prolog
+subtype(type("Box",params(XX)),type("java.lang.Object",null)).          % unsafe variable XX
+```
+
+instead of the guarded rule the method originally produced:
+
+```prolog
+subtype(type("Box",params(XX)),type("java.lang.Object",null)) :- subtype(type("Box",params(XX))).
+```
+
+The guard is **not** self-referential: its head is `subtype/2` while its body is `subtype/**1**`,
+a distinct predicate that `unifyDiss.lp:77` derives (`subtype(type(A, P)) :- subcons(type(A, P), _).`)
+to mark "this type actually occurs in the constraints". The body is what *binds* `XX`, so the
+guarded form is safe and instantiates the relation for the type arguments that really occur.
+
+That local change has been reverted, restoring the committed behaviour. With the guarded form:
+
+- `_a <. java.util.Vector<java.lang.Integer>` → exactly one model, `Vector<Integer>`. No
+  reflexivity rule is needed; `subtype(A,A) :- subtype(A,B).` fires once the guarded rule
+  instantiates `subtype(Vector<Integer>, Object)`.
+- **Bug 4** of `../ASP_BUGS.md` (parameterized extends-relations producing `error: unsafe
+  variables`) no longer reproduces — it was caused by that local change.
+- **Bug 3**'s input in the parameterized-extends form (`Box<X> < java.lang.Object`) now solves to
+  `sigma(tph("_a"), type("Box",params(type("java.lang.Integer",null))))`.
+
+A reflexivity rule (`subtype(type(C,P), type(C,P)) :- typeTerm(type(C,P)).`) was prototyped
+against the broken fact form and has been **reverted** — it is unnecessary.
+
+Bug 3 as written in `../ASP_BUGS.md` (a *raw* `Box < java.lang.Object` declaration combined with a
+parameterized `Box<java.lang.Integer>` use) is still UNSAT and remains open: the guard
+`subtype(type("Box",null))` never holds, because the constraints only ever mention `Box<Integer>`.
+`dissertation/chapters/unifyWithASP.tex:516` notes the intended relation coincides with
+Featherweight Generic Java's.
+
+---
+
+## Reproducing this
+
+```sh
+cd JavaTypeUnifyASP
+
+# the two minimal cases (paste the two .lp blocks above into files first)
+clingo -n 0 repro_bug1.lp  src/main/asp/unifyDiss.lp src/main/asp/show.lp
+clingo -n 0 repro_bug1b.lp src/main/asp/unifyDiss.lp src/main/asp/show.lp
+
+# a full sample, end to end
+cd .. && ./pipeline.sh JavaConstraintGenerator/src/test/resources/java-samples/testinput/ControlFlow/IfExample.java
+```
+
+To see *which* ground constraints a model violates, turn the integrity constraint into an
+observable atom:
+
+```sh
+sed 's/^ :- subcons(S, T), groundType(S), groundType(T), not subtype(S, T)\./violation(S,T) :- subcons(S, T), groundType(S), groundType(T), not subtype(S, T)./' \
+    src/main/asp/unifyDiss.lp > debug.lp
+echo '#show violation/2.' > showv.lp
+clingo -n 1 facts.lp debug.lp src/main/asp/jdkHierarchy.lp showv.lp
+```
+
+Adding `#minimize { 1, S, T : violation(S, T) }.` and `--opt-mode=optN` gives the irreducible set
+of unsatisfiable ground constraints — that is how the `Matrix` core above was found.

README.md

@@ -0,0 +1,83 @@
+# JavaTypeUnifyASP
+
+Step ② of the pipeline: **typing constraints → a type assignment.** Takes the `.cons` file
+[JavaConstraintGenerator](../ConstraintGeneration.md) produces, turns it into ASP facts, solves
+them with [clingo](https://potassco.org/clingo/), and turns the answer set back into JSON.
+
+See [../README.md](../README.md) for the whole flow and
+[`src/main/asp/unifyFinal.lp`](src/main/asp/unifyFinal.lp) for the encoding, whose comments map
+every rule to its counterpart in the dissertation.
+
+## CLI
+
+```sh
+java -jar target/JavaTXcompiler-0.1-jar-with-dependencies.jar <subcommand> [args]
+```
+
+| Subcommand | Purpose |
+| --- | --- |
+| `gen-facts <in.cons> <out.lp>` | constraints → ASP facts |
+| `cycle-check-facts <in.cons> <out.lp>` | facts for the cycle pre-check (below) |
+| `gen-facts-pruned <in.cons> <brave-atoms.txt> <out.lp>` | as `gen-facts`, minus the alternatives the pre-check ruled out |
+| `parse-solution <atoms.txt> <out.json>` | answer set → placeholder-name → type JSON |
+
+## The cycle pre-check
+
+A constraint set can force a type placeholder to equal a type that properly *contains* it — for
+example `_r <. C<_p>` together with `_p <. _res <. _r`, which makes `_p =. C<_p>`. No finite type
+satisfies that.
+
+The encoding already says so: the *Anti Cycle Conditions* (Build / Connect / Fail-Cycle) exist for
+exactly this case. But they are **integrity constraints**, and clingo evaluates those only once
+grounding has finished — while on a cyclic set grounding is precisely what does not terminate.
+Each *Subst-Param* firing nests a type one level deeper, and `maxdepth(5)` bounds the depth but
+not the branching, so the ground program grows out of reach. The symptom is a hang with
+`Rules: 0`, never an UNSAT. See [../ASP_BUGS.md](../ASP_BUGS.md), Bug 5.
+
+So the check runs **before** the solve, in [`src/main/asp/cycleCheck.lp`](src/main/asp/cycleCheck.lp).
+It builds no type terms at all — only a graph over placeholder identities — and therefore grounds
+in milliseconds however deep the types in the constraint set are.
+
+Two kinds of edge, and the distinction is the whole point:
+
+| Edge | From | Meaning |
+| --- | --- | --- |
+| `containsEdge` | `_r <. C<_p>`, `_r =. C<_p>`, `C<_p> =. _r` | solving `_r` means solving `_p` *inside* it |
+| `flowEdge` | `_p <. _res`, `_p =. _res` | `_p`'s type flows into `_res`'s |
+
+A selection of or-constraint alternatives is **cyclic** iff its graph has a cycle through at least
+one `containsEdge`. A cycle of flow edges alone (`_a <. _b <. _a`) is harmless — it just means the
+two are the same type.
+
+Because a cycle usually needs a particular *combination* of alternatives from *different*
+or-constraints, the question is combinatorial, so clingo answers it — in one call:
+
+```sh
+clingo --enum-mode=brave cycle_facts.lp src/main/asp/cycleCheck.lp
+```
+
+- **UNSATISFIABLE** → no acyclic selection exists → the constraint set has no finite solution.
+  Report it and stop, instead of hanging.
+- otherwise → the brave consequences (the *last* answer clingo prints, not the first) are exactly
+  the alternatives occurring in at least one acyclic selection. Anything absent belongs to no
+  solution, and `gen-facts-pruned` drops it.
+
+Dropping is sound because every satisfiable selection is acyclic. Measured on a set with four
+cyclic alternatives and one acyclic one:
+
+| | outcome | ground rules | time |
+| --- | --- | --- | --- |
+| unpruned | never finishes grounding | 0 | > 65 s |
+| pruned | SATISFIABLE | 265 | 4 ms |
+
+`../pipeline.sh` runs this automatically as part of step 2.
+
+**Caveat.** Sound only because F-bounded definitions (`class X extends C<X>`) are out of scope —
+the dissertation excludes them where it argues that restricting substitution to placeholder-free
+types preserves completeness. With an F-bounded class in the table, a type containing itself can
+be legitimate and this check would reject a satisfiable set.
+
+**Limitation.** Pruning removes an alternative only when it is cyclic in *every* selection. Where
+cyclic and acyclic selections coexist and both remain reachable, grounding still explores the
+cyclic ones. The corrected `connect` rule in `unifyFinal.lp` is the in-solver backstop for what
+the pre-check cannot see.

pom.xml

@@ -53,7 +53,6 @@ http://maven.apache.org/maven-v4_0_0.xsd">
 				<artifactId>maven-compiler-plugin</artifactId>
 				<version>3.8.0</version>
 				<configuration>
-					<compilerArgs>--enable-preview</compilerArgs>
                     <source>21</source>
                     <target>21</target>
                 </configuration>
@@ -77,7 +76,7 @@ http://maven.apache.org/maven-v4_0_0.xsd">
 				<configuration>
 					<archive>
 						<manifest>
-							<mainClass>de.dhbwstuttgart.core.ConsoleInterface</mainClass>
+							<mainClass>de.dhbwstuttgart.Main</mainClass>
 						</manifest>
 					</archive>
 				</configuration>
@@ -95,7 +94,7 @@ http://maven.apache.org/maven-v4_0_0.xsd">
 				<configuration>
 					<archive>
 						<manifest>
-							<mainClass>de.dhbwstuttgart.core.ConsoleInterface</mainClass>
+							<mainClass>de.dhbwstuttgart.Main</mainClass>
 						</manifest>
 					</archive>
 					<descriptorRefs>
@@ -114,7 +113,7 @@ http://maven.apache.org/maven-v4_0_0.xsd">
 	<properties>
 		<maven.compiler.source>19</maven.compiler.source>
 		<maven.compiler.target>19</maven.compiler.target>
-		<mainClass>de.dhbwstuttgart.core.ConsoleInterface</mainClass>
+		<mainClass>de.dhbwstuttgart.Main</mainClass>
 	</properties>
 	<distributionManagement>
 		<repository>

src/main/antlr4/de/dhbwstuttgart/input/parser/ConstraintSet.g4

@@ -0,0 +1,23 @@
+grammar ConstraintSet;
+
+constraintSet : (constraints | orConstraint | extendsRelation | ',')+;
+
+extendsRelation: IDENTIFIER typeParams? '<' type;
+typeParams : '<' IDENTIFIER (',' IDENTIFIER)* '>';
+
+orConstraint : '{' constraints ('|' constraints)* '}';
+constraints : '{' constraint (','? constraint)* '}' | constraint (','? constraint)*;
+constraint: subtypeCons | equalsCons;
+
+subtypeCons : type '<.' type;
+equalsCons : type '=.' type;
+
+type : tph | namedType;
+tph : '_' IDENTIFIER;
+namedType : IDENTIFIER params?;
+params : '<' type (',' type)* '>';
+
+IDENTIFIER: [0-9A-Za-z.$[;][0-9A-Za-z.$[;_]*;
+
+NEWLINE : [\r\n]+ -> skip;
+WS: [ \t] -> skip ;

src/main/antlr4/de/dhbwstuttgart/input/parser/Solution.g4

@@ -0,0 +1,11 @@
+grammar Solution;
+
+solutionset : solution (solution)*;
+solution : 'sigma(' tph ',' type ')';
+tph : 'tph("_' IDENTIFIER '")';
+type : 'type("' IDENTIFIER '",' params ')';
+params : 'null' | 'params(' type (',' type)* ')';
+
+IDENTIFIER: [0-9A-Za-z.$[;][0-9A-Za-z.$[;_]*;
+NEWLINE : [\r\n]+ -> skip;
+WS: [ \t] -> skip ;

src/main/asp/cycleCheck.lp

@@ -0,0 +1,51 @@
+%==============================================================================================
+% cycleCheck.lp - find or-constraint alternatives that can never be part of a solution because
+% they force a type placeholder to equal a type properly containing itself.
+%
+% Run BEFORE the real solve, over facts from `gen-facts --cycle-check`:
+%
+%   clingo --enum-mode=brave cycle-facts.lp cycleCheck.lp
+%
+% Brave enumeration returns the union of all answer sets, so the reported chosen/2 atoms are
+% exactly the alternatives that appear in at least one ACYCLIC selection. Anything absent from
+% that set is in no solution and can be dropped from the constraint set before solving.
+% UNSATISFIABLE means no acyclic selection exists at all - the constraint set has no finite
+% solution, and saying so here takes milliseconds.
+%
+% Why this is a separate program: the Anti Cycle Conditions in unifyFinal.lp express the same
+% idea, but they are integrity constraints, and clingo evaluates those only once grounding has
+% finished. On a cyclic set grounding never finishes (ASP_BUGS.md, Bug 5), so they never run.
+% This program builds no type terms at all - only placeholder identities - so it grounds
+% instantly no matter how deep the types in the constraint set are.
+%
+% CAVEAT: sound only because F-bounded definitions (class X extends C<X>) are out of scope. The
+% dissertation excludes them explicitly where it argues that restricting substitution to
+% placeholder-free types preserves completeness. With an F-bounded class in the table, a type
+% that contains itself can be legitimate and this check would reject a satisfiable set.
+%==============================================================================================
+
+% --- Input, emitted by ASPGenerator.generateCycleCheckFacts ------------------------------------
+%   alt(O, A).                    or-constraint O has an alternative A
+%   containsEdge(O, A, P, Q).     in alternative (O,A): P's own type must contain Q's
+%                                 e.g. "_r <. C1<_p1>" - solving _r means solving _p1 inside it
+%   flowEdge(O, A, P, Q).         in alternative (O,A): P's type flows into Q's ("_p <. _res")
+%
+% A constraint that is not part of any or-constraint is emitted as an or-constraint with a
+% single alternative, so it needs no special case: its edges are always present.
+
+% Exactly one alternative per or-constraint - the same choice the real encoding makes.
+{ chosen(O,A) : alt(O,A) } == 1 :- alt(O,_).
+
+contains(P,Q) :- containsEdge(O,A,P,Q), chosen(O,A).
+edge(P,Q) :- contains(P,Q).
+edge(P,Q) :- flowEdge(O,A,P,Q), chosen(O,A).
+
+reach(X,Y) :- edge(X,Y).
+reach(X,Z) :- reach(X,Y), edge(Y,Z).
+
+% A cycle is only fatal if it passes through at least one containment edge: that is what forces
+% a placeholder to sit strictly inside its own type. A cycle of flow edges alone
+% ("_a <. _b, _b <. _a") is harmless - it just means the two are the same type.
+:- contains(X,Y), reach(Y,X).
+
+#show chosen/2.

src/main/asp/jdkHierarchy.lp

@@ -0,0 +1,29 @@
+% Base subtype/2 facts for a small, common subset of java.lang.
+%
+% unifyDiss.lp's reflexive/transitive rules (subtype(B,B), subtype(A,A), subtype(A,C) :-
+% subtype(A,B), subtype(B,C)) only propagate subtype/2 facts that already exist - they never
+% originate one. ASPGenerator only emits subtype facts for user-defined `extends` relations
+% found in the .cons input (see ConstraintSet.g4's extendsRelation rule), not for built-in JDK
+% types. Without *some* subtype/2 base facts, any "concreteType <. placeholder" constraint (a
+% concrete type flowing in as a lower bound) is unsatisfiable: unifyDiss.lp's "super" choice rule
+% (line 88, "{ equalcons(tph(A), type(D, DP)) : subtype(type(C, CP), type(D, DP)) } == 1") must
+% pick exactly one candidate supertype D for the placeholder, and with zero subtype facts that
+% choice set is always empty.
+%
+% This is NOT a reflection of the full JDK class hierarchy - just the boxed numeric types, their
+% common ancestor Number, and Object/Boolean/Character/String - enough to make ordinary literals,
+% operators (`+`, comparisons, ...), and string concatenation resolvable. Extend as needed for
+% other library types your input code touches; a fuller version of this would enumerate the real
+% classpath (e.g. via reflection) rather than being hand-written.
+
+subtype(type("java.lang.Byte",null), type("java.lang.Number",null)).
+subtype(type("java.lang.Short",null), type("java.lang.Number",null)).
+subtype(type("java.lang.Integer",null), type("java.lang.Number",null)).
+subtype(type("java.lang.Long",null), type("java.lang.Number",null)).
+subtype(type("java.lang.Float",null), type("java.lang.Number",null)).
+subtype(type("java.lang.Double",null), type("java.lang.Number",null)).
+
+subtype(type("java.lang.Number",null), type("java.lang.Object",null)).
+subtype(type("java.lang.Boolean",null), type("java.lang.Object",null)).
+subtype(type("java.lang.Character",null), type("java.lang.Object",null)).
+subtype(type("java.lang.String",null), type("java.lang.Object",null)).

src/main/asp/show.lp

@@ -0,0 +1 @@
+#show sigma/2.

src/main/asp/testInput.lp

@@ -0,0 +1,41 @@
+% TEST INPUT
+orCons(undCons(subcons(tph("_BG"),type("java.lang.Number",null)),undCons(equalcons(tph("_BE"),type("java.lang.Boolean",null)),undCons(equalcons(type("java.lang.Boolean",null),tph("_AH")),undCons(subcons(tph("_BC"),type("java.lang.Number",null)),undCons(subcons(tph("_G"),type("java.lang.Integer",null)),undCons(subcons(type("java.util.Vector",params(type("java.lang.Integer",null))),tph("_AS")),undCons(equalcons(type("java.lang.Boolean",null),tph("_H")),undCons(subcons(tph("_AP"),tph("_AM")),undCons(subcons(tph("_AV"),tph("_AU")),undCons(equalcons(tph("_AI"),type("Matrix",null)),undCons(subcons(tph("_AD"),tph("_AB")),undCons(subcons(type("Matrix",null),tph("_AD")),undCons(subcons(tph("_AF"),type("java.lang.Number",null)),undCons(equalcons(tph("_AU"),tph("_CD")),undCons(equalcons(tph("_H"),type("java.lang.Boolean",null)),undCons(subcons(tph("_BV"),tph("_BA")),undCons(subcons(tph("_V"),type("java.lang.Integer",null)),undCons(subcons(tph("_J"),type("java.lang.Number",null)),undCons(subcons(tph("_AY"),type("java.lang.Number",null)),undCons(equalcons(tph("_AH"),type("java.lang.Boolean",null)),undCons(equalcons(type("java.lang.Boolean",null),tph("_BE")),undCons(equalcons(tph("_AF"),tph("_CK")),undCons(equalcons(type("java.lang.Boolean",null),tph("_AW")),undCons(subcons(tph("_AU"),type("java.lang.Number",null)),undCons(subcons(tph("_BD"),tph("_BC")),undCons(equalcons(tph("_AW"),type("java.lang.Boolean",null)),undCons(subcons(tph("_BB"),tph("_BA")),undCons(subcons(tph("_AG"),tph("_AF")),undCons(equalcons(tph("_S"),type("Matrix",null)),undCons(equalcons(type("java.util.Vector",params(type("java.util.Vector",params(type("java.lang.Integer",null))))),type("java.util.Vector",params(tph("_ANQ")))),undCons(subcons(type("java.lang.Integer",null),type("java.lang.Number",null)),undCons(equalcons(type("java.util.Vector",params(type("java.util.Vector",params(type("java.lang.Integer",null))))),type("java.util.Vector",params(tph("_ANR")))),undCons(equalcons(tph("_BC"),tph("_BW")),undCons(equalcons(tph("_AQ"),type("Matrix",null)),undCons(subcons(tph("_AK"),type("java.lang.Number",null)), null))))))))))))))))))))))))))))))))))), null).
+orCons(undCons(equalcons(tph("_AE"),type("Matrix",null)),undCons(subcons(type("Matrix",null),type("Matrix",null)), null)), null).
+orCons(undCons(equalcons(tph("_AG"),type("java.lang.Integer",null)), null), null).
+orCons(undCons(equalcons(tph("_AI"),type("java.util.AbstractList",params(tph("_AMV")))),undCons(subcons(type("java.lang.Integer",null),tph("_AK")), null)),orCons(undCons(equalcons(tph("_AI"),type("Matrix",null)),undCons(subcons(type("java.lang.Integer",null),tph("_AK")), null)),orCons(undCons(subcons(type("java.lang.Integer",null),tph("_AK")),undCons(equalcons(tph("_AI"),type("java.util.List",params(tph("_AMU")))), null)),orCons(undCons(equalcons(tph("_AI"),type("java.util.AbstractList",params(tph("_AMV")))),undCons(subcons(type("java.lang.Integer",null),tph("_AK")), null)),orCons(undCons(subcons(type("java.lang.Integer",null),tph("_AK")),undCons(equalcons(tph("_AI"),type("java.util.Vector",params(tph("_AMW")))), null)),orCons(undCons(equalcons(tph("_AI"),type("java.util.List",params(tph("_AMU")))),undCons(subcons(type("java.lang.Integer",null),tph("_AK")), null)),orCons(undCons(subcons(type("java.lang.Integer",null),tph("_AK")),undCons(equalcons(tph("_AI"),type("java.util.Vector",params(tph("_AMW")))), null)),orCons(undCons(equalcons(tph("_AI"),type("Matrix",null)),undCons(subcons(type("java.lang.Integer",null),tph("_AK")), null)), null)))))))).
+orCons(undCons(subcons(tph("_AF"),type("java.lang.Integer",null)),undCons(equalcons(tph("_AQ"),type("java.util.Vector",params(tph("_AMX")))),undCons(subcons(tph("_AMX"),tph("_AP")), null))),orCons(undCons(subcons(tph("_AF"),type("java.lang.Integer",null)),undCons(equalcons(tph("_AQ"),type("Matrix",null)),undCons(subcons(type("java.util.Vector",params(type("java.lang.Integer",null))),tph("_AP")), null))),orCons(undCons(subcons(tph("_AF"),type("java.lang.Integer",null)),undCons(equalcons(tph("_AQ"),type("java.util.Vector",params(tph("_AMX")))),undCons(subcons(tph("_AMX"),tph("_AP")), null))),orCons(undCons(subcons(tph("_AF"),type("java.lang.Integer",null)),undCons(equalcons(tph("_AQ"),type("Matrix",null)),undCons(subcons(type("java.util.Vector",params(type("java.lang.Integer",null))),tph("_AP")), null))), null)))).
+orCons(undCons(subcons(type("java.util.Vector",params(tph("_AMY"))),type("java.util.Vector",params(type("java.lang.Integer",null)))),undCons(equalcons(tph("_AT"),type("java.util.Vector",params(type("GE",null)))), null)), null).
+orCons(undCons(equalcons(tph("_AV"),type("java.lang.Integer",null)), null), null).
+orCons(undCons(subcons(type("java.lang.Integer",null),tph("_AY")),undCons(equalcons(tph("_AM"),type("Matrix",null)), null)),orCons(undCons(subcons(type("java.lang.Integer",null),tph("_AY")),undCons(equalcons(tph("_AM"),type("java.util.List",params(tph("_AMZ")))), null)),orCons(undCons(subcons(type("java.lang.Integer",null),tph("_AY")),undCons(equalcons(tph("_AM"),type("java.util.Vector",params(tph("_ANB")))), null)),orCons(undCons(subcons(type("java.lang.Integer",null),tph("_AY")),undCons(equalcons(tph("_AM"),type("java.util.List",params(tph("_AMZ")))), null)),orCons(undCons(subcons(type("java.lang.Integer",null),tph("_AY")),undCons(equalcons(tph("_AM"),type("java.util.AbstractList",params(tph("_ANA")))), null)),orCons(undCons(subcons(type("java.lang.Integer",null),tph("_AY")),undCons(equalcons(tph("_AM"),type("java.util.AbstractList",params(tph("_ANA")))), null)),orCons(undCons(subcons(type("java.lang.Integer",null),tph("_AY")),undCons(equalcons(tph("_AM"),type("Matrix",null)), null)),orCons(undCons(subcons(type("java.lang.Integer",null),tph("_AY")),undCons(equalcons(tph("_AM"),type("java.util.Vector",params(tph("_ANB")))), null)), null)))))))).
+orCons(undCons(equalcons(tph("_BB"),type("java.lang.Integer",null)), null), null).
+orCons(undCons(equalcons(tph("_BD"),type("java.lang.Integer",null)), null), null).
+orCons(undCons(equalcons(tph("_AM"),type("java.util.Vector",params(tph("_ANE")))),undCons(subcons(type("java.lang.Integer",null),tph("_BG")), null)),orCons(undCons(subcons(type("java.lang.Integer",null),tph("_BG")),undCons(equalcons(tph("_AM"),type("Matrix",null)), null)),orCons(undCons(equalcons(tph("_AM"),type("java.util.Vector",params(tph("_ANE")))),undCons(subcons(type("java.lang.Integer",null),tph("_BG")), null)),orCons(undCons(subcons(type("java.lang.Integer",null),tph("_BG")),undCons(equalcons(tph("_AM"),type("java.util.AbstractList",params(tph("_AND")))), null)),orCons(undCons(subcons(type("java.lang.Integer",null),tph("_BG")),undCons(equalcons(tph("_AM"),type("Matrix",null)), null)),orCons(undCons(equalcons(tph("_AM"),type("java.util.List",params(tph("_ANC")))),undCons(subcons(type("java.lang.Integer",null),tph("_BG")), null)),orCons(undCons(equalcons(tph("_AM"),type("java.util.List",params(tph("_ANC")))),undCons(subcons(type("java.lang.Integer",null),tph("_BG")), null)),orCons(undCons(subcons(type("java.lang.Integer",null),tph("_BG")),undCons(equalcons(tph("_AM"),type("java.util.AbstractList",params(tph("_AND")))), null)), null)))))))).
+orCons(undCons(subcons(type("java.util.Vector",params(type("java.lang.Integer",null))),tph("_BK")),undCons(subcons(tph("_BC"),type("java.lang.Integer",null)),undCons(equalcons(tph("_AM"),type("Matrix",null)), null))),orCons(undCons(subcons(type("java.util.Vector",params(type("java.lang.Integer",null))),tph("_BK")),undCons(subcons(tph("_BC"),type("java.lang.Integer",null)),undCons(equalcons(tph("_AM"),type("Matrix",null)), null))),orCons(undCons(subcons(tph("_BC"),type("java.lang.Integer",null)),undCons(subcons(tph("_ANG"),tph("_BK")),undCons(equalcons(tph("_AM"),type("java.util.AbstractList",params(tph("_ANG")))), null))),orCons(undCons(subcons(tph("_BC"),type("java.lang.Integer",null)),undCons(equalcons(tph("_AM"),type("java.util.Vector",params(tph("_ANH")))),undCons(subcons(tph("_ANH"),tph("_BK")), null))),orCons(undCons(subcons(tph("_BC"),type("java.lang.Integer",null)),undCons(subcons(tph("_ANG"),tph("_BK")),undCons(equalcons(tph("_AM"),type("java.util.AbstractList",params(tph("_ANG")))), null))),orCons(undCons(subcons(tph("_ANF"),tph("_BK")),undCons(subcons(tph("_BC"),type("java.lang.Integer",null)),undCons(equalcons(tph("_AM"),type("java.util.List",params(tph("_ANF")))), null))),orCons(undCons(subcons(tph("_ANF"),tph("_BK")),undCons(subcons(tph("_BC"),type("java.lang.Integer",null)),undCons(equalcons(tph("_AM"),type("java.util.List",params(tph("_ANF")))), null))),orCons(undCons(subcons(tph("_BC"),type("java.lang.Integer",null)),undCons(subcons(tph("_ANH"),tph("_BK")),undCons(equalcons(tph("_AM"),type("java.util.Vector",params(tph("_ANH")))), null))), null)))))))).
+orCons(undCons(subcons(tph("_BC"),type("java.lang.Integer",null)),undCons(subcons(tph("_ANI"),tph("_BR")),undCons(equalcons(tph("_AC"),type("java.util.List",params(tph("_ANI")))), null))),orCons(undCons(subcons(tph("_BC"),type("java.lang.Integer",null)),undCons(equalcons(tph("_AC"),type("Matrix",null)),undCons(subcons(type("java.util.Vector",params(type("java.lang.Integer",null))),tph("_BR")), null))),orCons(undCons(subcons(tph("_BC"),type("java.lang.Integer",null)),undCons(equalcons(tph("_AC"),type("Matrix",null)),undCons(subcons(type("java.util.Vector",params(type("java.lang.Integer",null))),tph("_BR")), null))),orCons(undCons(subcons(tph("_BC"),type("java.lang.Integer",null)),undCons(subcons(tph("_ANJ"),tph("_BR")),undCons(equalcons(tph("_AC"),type("java.util.AbstractList",params(tph("_ANJ")))), null))),orCons(undCons(equalcons(tph("_AC"),type("java.util.Vector",params(tph("_ANK")))),undCons(subcons(tph("_BC"),type("java.lang.Integer",null)),undCons(subcons(tph("_ANK"),tph("_BR")), null))),orCons(undCons(equalcons(tph("_AC"),type("java.util.Vector",params(tph("_ANK")))),undCons(subcons(tph("_BC"),type("java.lang.Integer",null)),undCons(subcons(tph("_ANK"),tph("_BR")), null))),orCons(undCons(subcons(tph("_BC"),type("java.lang.Integer",null)),undCons(subcons(tph("_ANI"),tph("_BR")),undCons(equalcons(tph("_AC"),type("java.util.List",params(tph("_ANI")))), null))),orCons(undCons(subcons(tph("_BC"),type("java.lang.Integer",null)),undCons(subcons(tph("_ANJ"),tph("_BR")),undCons(equalcons(tph("_AC"),type("java.util.AbstractList",params(tph("_ANJ")))), null))), null)))))))).
+orCons(undCons(subcons(tph("_ANM"),tph("_BO")),undCons(equalcons(tph("_BR"),type("java.util.AbstractList",params(tph("_ANM")))),undCons(subcons(tph("_AU"),type("java.lang.Integer",null)), null))),orCons(undCons(subcons(tph("_AU"),type("java.lang.Integer",null)),undCons(equalcons(tph("_BR"),type("Matrix",null)),undCons(subcons(type("java.util.Vector",params(type("java.lang.Integer",null))),tph("_BO")), null))),orCons(undCons(equalcons(tph("_BR"),type("java.util.List",params(tph("_ANL")))),undCons(subcons(tph("_ANL"),tph("_BO")),undCons(subcons(tph("_AU"),type("java.lang.Integer",null)), null))),orCons(undCons(equalcons(tph("_BR"),type("java.util.List",params(tph("_ANL")))),undCons(subcons(tph("_ANL"),tph("_BO")),undCons(subcons(tph("_AU"),type("java.lang.Integer",null)), null))),orCons(undCons(subcons(tph("_ANN"),tph("_BO")),undCons(equalcons(tph("_BR"),type("java.util.Vector",params(tph("_ANN")))),undCons(subcons(tph("_AU"),type("java.lang.Integer",null)), null))),orCons(undCons(subcons(tph("_ANM"),tph("_BO")),undCons(equalcons(tph("_BR"),type("java.util.AbstractList",params(tph("_ANM")))),undCons(subcons(tph("_AU"),type("java.lang.Integer",null)), null))),orCons(undCons(subcons(tph("_ANN"),tph("_BO")),undCons(equalcons(tph("_BR"),type("java.util.Vector",params(tph("_ANN")))),undCons(subcons(tph("_AU"),type("java.lang.Integer",null)), null))),orCons(undCons(subcons(tph("_AU"),type("java.lang.Integer",null)),undCons(equalcons(tph("_BR"),type("Matrix",null)),undCons(subcons(type("java.util.Vector",params(type("java.lang.Integer",null))),tph("_BO")), null))), null)))))))).
+orCons(undCons(subcons(tph("_BO"),type("java.lang.Integer",null)),undCons(equalcons(type("java.lang.Integer",null),tph("_BU")),undCons(subcons(tph("_BK"),type("java.lang.Integer",null)), null))), null).
+orCons(undCons(subcons(tph("_BU"),type("java.lang.Integer",null)),undCons(subcons(tph("_BA"),type("java.lang.Integer",null)),undCons(equalcons(type("java.lang.Integer",null),tph("_BV")), null))), null).
+orCons(undCons(subcons(tph("_BA"),type("java.util.Vector",params(type("java.lang.Integer",null)))),undCons(equalcons(tph("_AS"),type("Matrix",null)), null)),orCons(undCons(subcons(tph("_BA"),type("java.util.Vector",params(type("java.lang.Integer",null)))),undCons(equalcons(tph("_AS"),type("Matrix",null)), null)),orCons(undCons(equalcons(tph("_AS"),type("java.util.Vector",params(tph("_ANO")))),undCons(subcons(tph("_BA"),tph("_ANO")), null)),orCons(undCons(equalcons(tph("_AS"),type("java.util.Vector",params(tph("_ANO")))),undCons(subcons(tph("_BA"),tph("_ANO")), null)), null)))).
+orCons(undCons(subcons(tph("_AS"),type("java.util.Vector",params(type("java.lang.Integer",null)))),undCons(equalcons(tph("_AD"),type("Matrix",null)), null)),orCons(undCons(equalcons(tph("_AD"),type("java.util.Vector",params(tph("_ANP")))),undCons(subcons(tph("_AS"),tph("_ANP")), null)),orCons(undCons(subcons(tph("_AS"),type("java.util.Vector",params(type("java.lang.Integer",null)))),undCons(equalcons(tph("_AD"),type("Matrix",null)), null)),orCons(undCons(equalcons(tph("_AD"),type("java.util.Vector",params(tph("_ANP")))),undCons(subcons(tph("_AS"),tph("_ANP")), null)), null)))).
+orCons(undCons(equalcons(tph("_G"),type("java.lang.Integer",null)), null), null).
+orCons(undCons(subcons(type("java.lang.Integer",null),tph("_J")),undCons(equalcons(tph("_F"),type("java.util.List",params(tph("_ANS")))), null)),orCons(undCons(equalcons(tph("_F"),type("java.util.AbstractList",params(tph("_ANT")))),undCons(subcons(type("java.lang.Integer",null),tph("_J")), null)),orCons(undCons(subcons(type("java.lang.Integer",null),tph("_J")),undCons(equalcons(tph("_F"),type("java.util.Vector",params(tph("_ANU")))), null)),orCons(undCons(equalcons(tph("_F"),type("Matrix",null)),undCons(subcons(type("java.lang.Integer",null),tph("_J")), null)),orCons(undCons(equalcons(tph("_F"),type("Matrix",null)),undCons(subcons(type("java.lang.Integer",null),tph("_J")), null)),orCons(undCons(subcons(type("java.lang.Integer",null),tph("_J")),undCons(equalcons(tph("_F"),type("java.util.List",params(tph("_ANS")))), null)),orCons(undCons(subcons(type("java.lang.Integer",null),tph("_J")),undCons(equalcons(tph("_F"),type("java.util.Vector",params(tph("_ANU")))), null)),orCons(undCons(equalcons(tph("_F"),type("java.util.AbstractList",params(tph("_ANT")))),undCons(subcons(type("java.lang.Integer",null),tph("_J")), null)), null)))))))).
+orCons(undCons(subcons(type("java.lang.Integer",null),type("java.lang.Integer",null)),undCons(subcons(tph("_ANV"),tph("_N")),undCons(equalcons(tph("_F"),type("java.util.Vector",params(tph("_ANV")))), null))),orCons(undCons(equalcons(tph("_F"),type("Matrix",null)),undCons(subcons(type("java.lang.Integer",null),type("java.lang.Integer",null)),undCons(subcons(type("java.util.Vector",params(type("java.lang.Integer",null))),tph("_N")), null))),orCons(undCons(subcons(type("java.lang.Integer",null),type("java.lang.Integer",null)),undCons(subcons(tph("_ANV"),tph("_N")),undCons(equalcons(tph("_F"),type("java.util.Vector",params(tph("_ANV")))), null))),orCons(undCons(equalcons(tph("_F"),type("Matrix",null)),undCons(subcons(type("java.lang.Integer",null),type("java.lang.Integer",null)),undCons(subcons(type("java.util.Vector",params(type("java.lang.Integer",null))),tph("_N")), null))), null)))).
+orCons(undCons(equalcons(tph("_F"),type("Matrix",null)),undCons(subcons(type("java.lang.Integer",null),type("java.lang.Integer",null)),undCons(subcons(type("java.util.Vector",params(type("java.lang.Integer",null))),tph("_N")), null))),orCons(undCons(equalcons(tph("_F"),type("java.util.Vector",params(tph("_ANX")))),undCons(subcons(type("java.lang.Integer",null),type("java.lang.Integer",null)),undCons(subcons(tph("_ANX"),tph("_N")), null))),orCons(undCons(equalcons(tph("_F"),type("java.util.Vector",params(tph("_ANX")))),undCons(subcons(type("java.lang.Integer",null),type("java.lang.Integer",null)),undCons(subcons(tph("_ANX"),tph("_N")), null))),orCons(undCons(equalcons(tph("_F"),type("Matrix",null)),undCons(subcons(type("java.lang.Integer",null),type("java.lang.Integer",null)),undCons(subcons(type("java.util.Vector",params(type("java.lang.Integer",null))),tph("_N")), null))), null)))).
+orCons(undCons(equalcons(tph("_F"),type("Matrix",null)),undCons(subcons(type("java.lang.Integer",null),type("java.lang.Integer",null)),undCons(subcons(type("java.util.Vector",params(type("java.lang.Integer",null))),tph("_N")), null))),orCons(undCons(subcons(type("java.lang.Integer",null),type("java.lang.Integer",null)),undCons(equalcons(tph("_F"),type("Matrix",null)),undCons(subcons(type("java.util.Vector",params(type("java.lang.Integer",null))),tph("_N")), null))),orCons(undCons(equalcons(tph("_F"),type("java.util.Vector",params(tph("_ANZ")))),undCons(subcons(type("java.lang.Integer",null),type("java.lang.Integer",null)),undCons(subcons(tph("_ANZ"),tph("_N")), null))),orCons(undCons(equalcons(tph("_F"),type("java.util.Vector",params(tph("_ANZ")))),undCons(subcons(type("java.lang.Integer",null),type("java.lang.Integer",null)),undCons(subcons(tph("_ANZ"),tph("_N")), null))), null)))).
+orCons(undCons(equalcons(tph("_F"),type("Matrix",null)),undCons(subcons(type("java.lang.Integer",null),type("java.lang.Integer",null)),undCons(subcons(type("java.util.Vector",params(type("java.lang.Integer",null))),tph("_N")), null))),orCons(undCons(subcons(tph("_AOB"),tph("_N")),undCons(subcons(type("java.lang.Integer",null),type("java.lang.Integer",null)),undCons(equalcons(tph("_F"),type("java.util.Vector",params(tph("_AOB")))), null))),orCons(undCons(subcons(tph("_AOB"),tph("_N")),undCons(subcons(type("java.lang.Integer",null),type("java.lang.Integer",null)),undCons(equalcons(tph("_F"),type("java.util.Vector",params(tph("_AOB")))), null))),orCons(undCons(subcons(type("java.lang.Integer",null),type("java.lang.Integer",null)),undCons(equalcons(tph("_F"),type("Matrix",null)),undCons(subcons(type("java.util.Vector",params(type("java.lang.Integer",null))),tph("_N")), null))), null)))).
+orCons(undCons(subcons(type("java.lang.Boolean",null),tph("_R")),undCons(subcons(tph("_N"),tph("_AOA")),undCons(equalcons(tph("_S"),type("java.util.Vector",params(tph("_AOA")))), null))),orCons(undCons(subcons(type("java.lang.Boolean",null),tph("_R")),undCons(subcons(tph("_N"),tph("_ANW")),undCons(equalcons(tph("_S"),type("java.util.List",params(tph("_ANW")))), null))),orCons(undCons(subcons(type("java.lang.Boolean",null),tph("_R")),undCons(subcons(tph("_N"),tph("_ANW")),undCons(equalcons(tph("_S"),type("java.util.List",params(tph("_ANW")))), null))),orCons(undCons(subcons(type("java.lang.Boolean",null),tph("_R")),undCons(subcons(tph("_N"),tph("_AOA")),undCons(equalcons(tph("_S"),type("java.util.Vector",params(tph("_AOA")))), null))),orCons(undCons(subcons(type("java.lang.Boolean",null),tph("_R")),undCons(equalcons(tph("_S"),type("Matrix",null)),undCons(subcons(tph("_N"),type("java.util.Vector",params(type("java.lang.Integer",null)))), null))),orCons(undCons(subcons(type("java.lang.Boolean",null),tph("_R")),undCons(equalcons(tph("_S"),type("Matrix",null)),undCons(subcons(tph("_N"),type("java.util.Vector",params(type("java.lang.Integer",null)))), null))),orCons(undCons(subcons(type("java.lang.Boolean",null),tph("_R")),undCons(equalcons(tph("_S"),type("java.util.AbstractList",params(tph("_ANY")))),undCons(subcons(tph("_N"),tph("_ANY")), null))),orCons(undCons(subcons(type("java.lang.Boolean",null),tph("_R")),undCons(equalcons(tph("_S"),type("java.util.AbstractList",params(tph("_ANY")))),undCons(subcons(tph("_N"),tph("_ANY")), null))), null)))))))).
+orCons(undCons(equalcons(tph("_U"),type("java.lang.Integer",null)), null), null).
+orCons(undCons(subcons(type("java.lang.Integer",null),type("java.lang.Integer",null)),undCons(subcons(tph("_U"),type("java.lang.Integer",null)),undCons(equalcons(type("java.lang.Integer",null),tph("_V")), null))), null).
+
+subtype(type("java.lang.Boolean",null),type("java.lang.Object",null)):-subtype(type("java.lang.Boolean",null)).subtype(type("java.lang.Integer",null),type("java.lang.Number",null)):-subtype(type("java.lang.Integer",null)).subtype(type("java.lang.Number",null),type("java.lang.Object",null)):-subtype(type("java.lang.Number",null)).
+subtype(type("java.util.Vector",params(XX)),type("java.lang.Object",null)):-subtype(type("java.util.Vector",params(XX))).
+subtype(type("Matrix",null),type("java.util.Vector",params(type("java.util.Vector",params(type("java.lang.Integer",null)))))):-subtype(type("Matrix",null)).
+
+subtype(type("java.lang.Boolean",null),type("java.lang.Object",null)):-subtype(type("java.lang.Boolean",null)).subtype(type("java.lang.Integer",null),type("java.lang.Number",null)):-subtype(type("java.lang.Integer",null)).subtype(type("java.lang.Number",null),type("java.lang.Object",null)):-subtype(type("java.lang.Number",null)).subtype(type("java.util.Vector",params(XX)),type("java.lang.Object",null)):-subtype(type("java.util.Vector",params(XX))).subtype(type("Matrix",null),type("java.util.Vector",params(type("java.util.Vector",params(type("java.lang.Integer",null)))))):-subtype(type("Matrix",null)).
+
+subtype(type("C1",null),type("java.lang.Object",null)):-subtype(type("C1",null)).
+subtype(type("C2",null),type("java.lang.Object",null)):-subtype(type("C2",null)).
+subtype(type("java.lang.Boolean",null),type("java.lang.Object",null)):-subtype(type("java.lang.Boolean",null)).subtype(type("java.lang.String",null),type("java.lang.Object",null)):-subtype(type("java.lang.String",null)).subtype(type("java.lang.Integer",null),type("java.lang.Object",null)):-subtype(type("java.lang.Integer",null)).subtype(type("OrConsTest",null),type("java.lang.Object",null)):-subtype(type("OrConsTest",null)).subtype(type("MyPair",params(XX,XY)),type("Pair",params(XX,XX))):-subtype(type("MyPair",params(XX,XY))).subtype(type("Pair",params(XX,XY)),type("java.lang.Object",null)):-subtype(type("Pair",params(XX,XY))).subtype(type("List",params(XX)),type("java.lang.Object",null)):-subtype(type("List",params(XX))).subtype(type("Integer",null),type("java.lang.Object",null)):-subtype(type("Integer",null)).subtype(type("String",null),type("java.lang.Object",null)):-subtype(type("String",null)).
+
+
+#show sigma/2.

src/main/asp/testSolutionGen.lp

@@ -0,0 +1,10 @@
+subcons(tph("A"), type("C", "none")).
+subcons(tph("A"), type("C2", "none")).
+
+equalcons(tph("A"), type("C2", "none2")).
+
+:- equalcons(A, B), equalcons(A, C), C != B.
+
+subcons(tph(A), type(C, CP)) :- equalcons(tph(A), type(C, CP)).
+equalcons(tph(A), type(C, CP)) ; nothingFor(tph(A), type(C, CP)) :- subcons(tph(A), type(C, CP)).
+ :- nothingFor(tph(A), _), not equalcons(tph(A), _).

src/main/asp/unify.lp

@@ -0,0 +1,127 @@
+% TEST INPUT
+orCons(undCons(lessdot(tph("_BG"),type("java.lang.Number",null)),undCons(equalsdot(tph("_BE"),type("java.lang.Boolean",null)),undCons(equalsdot(type("java.lang.Boolean",null),tph("_AH")),undCons(lessdot(tph("_BC"),type("java.lang.Number",null)),undCons(lessdot(tph("_G"),type("java.lang.Integer",null)),undCons(lessdot(type("java.util.Vector",params(type("java.lang.Integer",null))),tph("_AS")),undCons(equalsdot(type("java.lang.Boolean",null),tph("_H")),undCons(lessdot(tph("_AP"),tph("_AM")),undCons(lessdot(tph("_AV"),tph("_AU")),undCons(equalsdot(tph("_AI"),type("Matrix",null)),undCons(lessdot(tph("_AD"),tph("_AB")),undCons(lessdot(type("Matrix",null),tph("_AD")),undCons(lessdot(tph("_AF"),type("java.lang.Number",null)),undCons(equalsdot(tph("_AU"),tph("_CD")),undCons(equalsdot(tph("_H"),type("java.lang.Boolean",null)),undCons(lessdot(tph("_BV"),tph("_BA")),undCons(lessdot(tph("_V"),type("java.lang.Integer",null)),undCons(lessdot(tph("_J"),type("java.lang.Number",null)),undCons(lessdot(tph("_AY"),type("java.lang.Number",null)),undCons(equalsdot(tph("_AH"),type("java.lang.Boolean",null)),undCons(equalsdot(type("java.lang.Boolean",null),tph("_BE")),undCons(equalsdot(tph("_AF"),tph("_CK")),undCons(equalsdot(type("java.lang.Boolean",null),tph("_AW")),undCons(lessdot(tph("_AU"),type("java.lang.Number",null)),undCons(lessdot(tph("_BD"),tph("_BC")),undCons(equalsdot(tph("_AW"),type("java.lang.Boolean",null)),undCons(lessdot(tph("_BB"),tph("_BA")),undCons(lessdot(tph("_AG"),tph("_AF")),undCons(equalsdot(tph("_S"),type("Matrix",null)),undCons(equalsdot(type("java.util.Vector",params(type("java.util.Vector",params(type("java.lang.Integer",null))))),type("java.util.Vector",params(tph("_ANQ")))),undCons(lessdot(type("java.lang.Integer",null),type("java.lang.Number",null)),undCons(equalsdot(type("java.util.Vector",params(type("java.util.Vector",params(type("java.lang.Integer",null))))),type("java.util.Vector",params(tph("_ANR")))),undCons(equalsdot(tph("_BC"),tph("_BW")),undCons(equalsdot(tph("_AQ"),type("Matrix",null)),undCons(lessdot(tph("_AK"),type("java.lang.Number",null)), null))))))))))))))))))))))))))))))))))), null).
+orCons(undCons(equalsdot(tph("_AE"),type("Matrix",null)),undCons(lessdot(type("Matrix",null),type("Matrix",null)), null)), null).
+orCons(undCons(equalsdot(tph("_AG"),type("java.lang.Integer",null)), null), null).
+orCons(undCons(equalsdot(tph("_AI"),type("java.util.AbstractList",params(tph("_AMV")))),undCons(lessdot(type("java.lang.Integer",null),tph("_AK")), null)),orCons(undCons(equalsdot(tph("_AI"),type("Matrix",null)),undCons(lessdot(type("java.lang.Integer",null),tph("_AK")), null)),orCons(undCons(lessdot(type("java.lang.Integer",null),tph("_AK")),undCons(equalsdot(tph("_AI"),type("java.util.List",params(tph("_AMU")))), null)),orCons(undCons(equalsdot(tph("_AI"),type("java.util.AbstractList",params(tph("_AMV")))),undCons(lessdot(type("java.lang.Integer",null),tph("_AK")), null)),orCons(undCons(lessdot(type("java.lang.Integer",null),tph("_AK")),undCons(equalsdot(tph("_AI"),type("java.util.Vector",params(tph("_AMW")))), null)),orCons(undCons(equalsdot(tph("_AI"),type("java.util.List",params(tph("_AMU")))),undCons(lessdot(type("java.lang.Integer",null),tph("_AK")), null)),orCons(undCons(lessdot(type("java.lang.Integer",null),tph("_AK")),undCons(equalsdot(tph("_AI"),type("java.util.Vector",params(tph("_AMW")))), null)),orCons(undCons(equalsdot(tph("_AI"),type("Matrix",null)),undCons(lessdot(type("java.lang.Integer",null),tph("_AK")), null)), null)))))))).
+orCons(undCons(lessdot(tph("_AF"),type("java.lang.Integer",null)),undCons(equalsdot(tph("_AQ"),type("java.util.Vector",params(tph("_AMX")))),undCons(lessdot(tph("_AMX"),tph("_AP")), null))),orCons(undCons(lessdot(tph("_AF"),type("java.lang.Integer",null)),undCons(equalsdot(tph("_AQ"),type("Matrix",null)),undCons(lessdot(type("java.util.Vector",params(type("java.lang.Integer",null))),tph("_AP")), null))),orCons(undCons(lessdot(tph("_AF"),type("java.lang.Integer",null)),undCons(equalsdot(tph("_AQ"),type("java.util.Vector",params(tph("_AMX")))),undCons(lessdot(tph("_AMX"),tph("_AP")), null))),orCons(undCons(lessdot(tph("_AF"),type("java.lang.Integer",null)),undCons(equalsdot(tph("_AQ"),type("Matrix",null)),undCons(lessdot(type("java.util.Vector",params(type("java.lang.Integer",null))),tph("_AP")), null))), null)))).
+orCons(undCons(lessdot(type("java.util.Vector",params(tph("_AMY"))),type("java.util.Vector",params(type("java.lang.Integer",null)))),undCons(equalsdot(tph("_AT"),type("java.util.Vector",params(type("GE",null)))), null)), null).
+orCons(undCons(equalsdot(tph("_AV"),type("java.lang.Integer",null)), null), null).
+orCons(undCons(lessdot(type("java.lang.Integer",null),tph("_AY")),undCons(equalsdot(tph("_AM"),type("Matrix",null)), null)),orCons(undCons(lessdot(type("java.lang.Integer",null),tph("_AY")),undCons(equalsdot(tph("_AM"),type("java.util.List",params(tph("_AMZ")))), null)),orCons(undCons(lessdot(type("java.lang.Integer",null),tph("_AY")),undCons(equalsdot(tph("_AM"),type("java.util.Vector",params(tph("_ANB")))), null)),orCons(undCons(lessdot(type("java.lang.Integer",null),tph("_AY")),undCons(equalsdot(tph("_AM"),type("java.util.List",params(tph("_AMZ")))), null)),orCons(undCons(lessdot(type("java.lang.Integer",null),tph("_AY")),undCons(equalsdot(tph("_AM"),type("java.util.AbstractList",params(tph("_ANA")))), null)),orCons(undCons(lessdot(type("java.lang.Integer",null),tph("_AY")),undCons(equalsdot(tph("_AM"),type("java.util.AbstractList",params(tph("_ANA")))), null)),orCons(undCons(lessdot(type("java.lang.Integer",null),tph("_AY")),undCons(equalsdot(tph("_AM"),type("Matrix",null)), null)),orCons(undCons(lessdot(type("java.lang.Integer",null),tph("_AY")),undCons(equalsdot(tph("_AM"),type("java.util.Vector",params(tph("_ANB")))), null)), null)))))))).
+orCons(undCons(equalsdot(tph("_BB"),type("java.lang.Integer",null)), null), null).
+orCons(undCons(equalsdot(tph("_BD"),type("java.lang.Integer",null)), null), null).
+orCons(undCons(equalsdot(tph("_AM"),type("java.util.Vector",params(tph("_ANE")))),undCons(lessdot(type("java.lang.Integer",null),tph("_BG")), null)),orCons(undCons(lessdot(type("java.lang.Integer",null),tph("_BG")),undCons(equalsdot(tph("_AM"),type("Matrix",null)), null)),orCons(undCons(equalsdot(tph("_AM"),type("java.util.Vector",params(tph("_ANE")))),undCons(lessdot(type("java.lang.Integer",null),tph("_BG")), null)),orCons(undCons(lessdot(type("java.lang.Integer",null),tph("_BG")),undCons(equalsdot(tph("_AM"),type("java.util.AbstractList",params(tph("_AND")))), null)),orCons(undCons(lessdot(type("java.lang.Integer",null),tph("_BG")),undCons(equalsdot(tph("_AM"),type("Matrix",null)), null)),orCons(undCons(equalsdot(tph("_AM"),type("java.util.List",params(tph("_ANC")))),undCons(lessdot(type("java.lang.Integer",null),tph("_BG")), null)),orCons(undCons(equalsdot(tph("_AM"),type("java.util.List",params(tph("_ANC")))),undCons(lessdot(type("java.lang.Integer",null),tph("_BG")), null)),orCons(undCons(lessdot(type("java.lang.Integer",null),tph("_BG")),undCons(equalsdot(tph("_AM"),type("java.util.AbstractList",params(tph("_AND")))), null)), null)))))))).
+orCons(undCons(lessdot(type("java.util.Vector",params(type("java.lang.Integer",null))),tph("_BK")),undCons(lessdot(tph("_BC"),type("java.lang.Integer",null)),undCons(equalsdot(tph("_AM"),type("Matrix",null)), null))),orCons(undCons(lessdot(type("java.util.Vector",params(type("java.lang.Integer",null))),tph("_BK")),undCons(lessdot(tph("_BC"),type("java.lang.Integer",null)),undCons(equalsdot(tph("_AM"),type("Matrix",null)), null))),orCons(undCons(lessdot(tph("_BC"),type("java.lang.Integer",null)),undCons(lessdot(tph("_ANG"),tph("_BK")),undCons(equalsdot(tph("_AM"),type("java.util.AbstractList",params(tph("_ANG")))), null))),orCons(undCons(lessdot(tph("_BC"),type("java.lang.Integer",null)),undCons(equalsdot(tph("_AM"),type("java.util.Vector",params(tph("_ANH")))),undCons(lessdot(tph("_ANH"),tph("_BK")), null))),orCons(undCons(lessdot(tph("_BC"),type("java.lang.Integer",null)),undCons(lessdot(tph("_ANG"),tph("_BK")),undCons(equalsdot(tph("_AM"),type("java.util.AbstractList",params(tph("_ANG")))), null))),orCons(undCons(lessdot(tph("_ANF"),tph("_BK")),undCons(lessdot(tph("_BC"),type("java.lang.Integer",null)),undCons(equalsdot(tph("_AM"),type("java.util.List",params(tph("_ANF")))), null))),orCons(undCons(lessdot(tph("_ANF"),tph("_BK")),undCons(lessdot(tph("_BC"),type("java.lang.Integer",null)),undCons(equalsdot(tph("_AM"),type("java.util.List",params(tph("_ANF")))), null))),orCons(undCons(lessdot(tph("_BC"),type("java.lang.Integer",null)),undCons(lessdot(tph("_ANH"),tph("_BK")),undCons(equalsdot(tph("_AM"),type("java.util.Vector",params(tph("_ANH")))), null))), null)))))))).
+orCons(undCons(lessdot(tph("_BC"),type("java.lang.Integer",null)),undCons(lessdot(tph("_ANI"),tph("_BR")),undCons(equalsdot(tph("_AC"),type("java.util.List",params(tph("_ANI")))), null))),orCons(undCons(lessdot(tph("_BC"),type("java.lang.Integer",null)),undCons(equalsdot(tph("_AC"),type("Matrix",null)),undCons(lessdot(type("java.util.Vector",params(type("java.lang.Integer",null))),tph("_BR")), null))),orCons(undCons(lessdot(tph("_BC"),type("java.lang.Integer",null)),undCons(equalsdot(tph("_AC"),type("Matrix",null)),undCons(lessdot(type("java.util.Vector",params(type("java.lang.Integer",null))),tph("_BR")), null))),orCons(undCons(lessdot(tph("_BC"),type("java.lang.Integer",null)),undCons(lessdot(tph("_ANJ"),tph("_BR")),undCons(equalsdot(tph("_AC"),type("java.util.AbstractList",params(tph("_ANJ")))), null))),orCons(undCons(equalsdot(tph("_AC"),type("java.util.Vector",params(tph("_ANK")))),undCons(lessdot(tph("_BC"),type("java.lang.Integer",null)),undCons(lessdot(tph("_ANK"),tph("_BR")), null))),orCons(undCons(equalsdot(tph("_AC"),type("java.util.Vector",params(tph("_ANK")))),undCons(lessdot(tph("_BC"),type("java.lang.Integer",null)),undCons(lessdot(tph("_ANK"),tph("_BR")), null))),orCons(undCons(lessdot(tph("_BC"),type("java.lang.Integer",null)),undCons(lessdot(tph("_ANI"),tph("_BR")),undCons(equalsdot(tph("_AC"),type("java.util.List",params(tph("_ANI")))), null))),orCons(undCons(lessdot(tph("_BC"),type("java.lang.Integer",null)),undCons(lessdot(tph("_ANJ"),tph("_BR")),undCons(equalsdot(tph("_AC"),type("java.util.AbstractList",params(tph("_ANJ")))), null))), null)))))))).
+orCons(undCons(lessdot(tph("_ANM"),tph("_BO")),undCons(equalsdot(tph("_BR"),type("java.util.AbstractList",params(tph("_ANM")))),undCons(lessdot(tph("_AU"),type("java.lang.Integer",null)), null))),orCons(undCons(lessdot(tph("_AU"),type("java.lang.Integer",null)),undCons(equalsdot(tph("_BR"),type("Matrix",null)),undCons(lessdot(type("java.util.Vector",params(type("java.lang.Integer",null))),tph("_BO")), null))),orCons(undCons(equalsdot(tph("_BR"),type("java.util.List",params(tph("_ANL")))),undCons(lessdot(tph("_ANL"),tph("_BO")),undCons(lessdot(tph("_AU"),type("java.lang.Integer",null)), null))),orCons(undCons(equalsdot(tph("_BR"),type("java.util.List",params(tph("_ANL")))),undCons(lessdot(tph("_ANL"),tph("_BO")),undCons(lessdot(tph("_AU"),type("java.lang.Integer",null)), null))),orCons(undCons(lessdot(tph("_ANN"),tph("_BO")),undCons(equalsdot(tph("_BR"),type("java.util.Vector",params(tph("_ANN")))),undCons(lessdot(tph("_AU"),type("java.lang.Integer",null)), null))),orCons(undCons(lessdot(tph("_ANM"),tph("_BO")),undCons(equalsdot(tph("_BR"),type("java.util.AbstractList",params(tph("_ANM")))),undCons(lessdot(tph("_AU"),type("java.lang.Integer",null)), null))),orCons(undCons(lessdot(tph("_ANN"),tph("_BO")),undCons(equalsdot(tph("_BR"),type("java.util.Vector",params(tph("_ANN")))),undCons(lessdot(tph("_AU"),type("java.lang.Integer",null)), null))),orCons(undCons(lessdot(tph("_AU"),type("java.lang.Integer",null)),undCons(equalsdot(tph("_BR"),type("Matrix",null)),undCons(lessdot(type("java.util.Vector",params(type("java.lang.Integer",null))),tph("_BO")), null))), null)))))))).
+orCons(undCons(lessdot(tph("_BO"),type("java.lang.Integer",null)),undCons(equalsdot(type("java.lang.Integer",null),tph("_BU")),undCons(lessdot(tph("_BK"),type("java.lang.Integer",null)), null))), null).
+orCons(undCons(lessdot(tph("_BU"),type("java.lang.Integer",null)),undCons(lessdot(tph("_BA"),type("java.lang.Integer",null)),undCons(equalsdot(type("java.lang.Integer",null),tph("_BV")), null))), null).
+orCons(undCons(lessdot(tph("_BA"),type("java.util.Vector",params(type("java.lang.Integer",null)))),undCons(equalsdot(tph("_AS"),type("Matrix",null)), null)),orCons(undCons(lessdot(tph("_BA"),type("java.util.Vector",params(type("java.lang.Integer",null)))),undCons(equalsdot(tph("_AS"),type("Matrix",null)), null)),orCons(undCons(equalsdot(tph("_AS"),type("java.util.Vector",params(tph("_ANO")))),undCons(lessdot(tph("_BA"),tph("_ANO")), null)),orCons(undCons(equalsdot(tph("_AS"),type("java.util.Vector",params(tph("_ANO")))),undCons(lessdot(tph("_BA"),tph("_ANO")), null)), null)))).
+orCons(undCons(lessdot(tph("_AS"),type("java.util.Vector",params(type("java.lang.Integer",null)))),undCons(equalsdot(tph("_AD"),type("Matrix",null)), null)),orCons(undCons(equalsdot(tph("_AD"),type("java.util.Vector",params(tph("_ANP")))),undCons(lessdot(tph("_AS"),tph("_ANP")), null)),orCons(undCons(lessdot(tph("_AS"),type("java.util.Vector",params(type("java.lang.Integer",null)))),undCons(equalsdot(tph("_AD"),type("Matrix",null)), null)),orCons(undCons(equalsdot(tph("_AD"),type("java.util.Vector",params(tph("_ANP")))),undCons(lessdot(tph("_AS"),tph("_ANP")), null)), null)))).
+orCons(undCons(equalsdot(tph("_G"),type("java.lang.Integer",null)), null), null).
+orCons(undCons(lessdot(type("java.lang.Integer",null),tph("_J")),undCons(equalsdot(tph("_F"),type("java.util.List",params(tph("_ANS")))), null)),orCons(undCons(equalsdot(tph("_F"),type("java.util.AbstractList",params(tph("_ANT")))),undCons(lessdot(type("java.lang.Integer",null),tph("_J")), null)),orCons(undCons(lessdot(type("java.lang.Integer",null),tph("_J")),undCons(equalsdot(tph("_F"),type("java.util.Vector",params(tph("_ANU")))), null)),orCons(undCons(equalsdot(tph("_F"),type("Matrix",null)),undCons(lessdot(type("java.lang.Integer",null),tph("_J")), null)),orCons(undCons(equalsdot(tph("_F"),type("Matrix",null)),undCons(lessdot(type("java.lang.Integer",null),tph("_J")), null)),orCons(undCons(lessdot(type("java.lang.Integer",null),tph("_J")),undCons(equalsdot(tph("_F"),type("java.util.List",params(tph("_ANS")))), null)),orCons(undCons(lessdot(type("java.lang.Integer",null),tph("_J")),undCons(equalsdot(tph("_F"),type("java.util.Vector",params(tph("_ANU")))), null)),orCons(undCons(equalsdot(tph("_F"),type("java.util.AbstractList",params(tph("_ANT")))),undCons(lessdot(type("java.lang.Integer",null),tph("_J")), null)), null)))))))).
+orCons(undCons(lessdot(type("java.lang.Integer",null),type("java.lang.Integer",null)),undCons(lessdot(tph("_ANV"),tph("_N")),undCons(equalsdot(tph("_F"),type("java.util.Vector",params(tph("_ANV")))), null))),orCons(undCons(equalsdot(tph("_F"),type("Matrix",null)),undCons(lessdot(type("java.lang.Integer",null),type("java.lang.Integer",null)),undCons(lessdot(type("java.util.Vector",params(type("java.lang.Integer",null))),tph("_N")), null))),orCons(undCons(lessdot(type("java.lang.Integer",null),type("java.lang.Integer",null)),undCons(lessdot(tph("_ANV"),tph("_N")),undCons(equalsdot(tph("_F"),type("java.util.Vector",params(tph("_ANV")))), null))),orCons(undCons(equalsdot(tph("_F"),type("Matrix",null)),undCons(lessdot(type("java.lang.Integer",null),type("java.lang.Integer",null)),undCons(lessdot(type("java.util.Vector",params(type("java.lang.Integer",null))),tph("_N")), null))), null)))).
+orCons(undCons(equalsdot(tph("_F"),type("Matrix",null)),undCons(lessdot(type("java.lang.Integer",null),type("java.lang.Integer",null)),undCons(lessdot(type("java.util.Vector",params(type("java.lang.Integer",null))),tph("_N")), null))),orCons(undCons(equalsdot(tph("_F"),type("java.util.Vector",params(tph("_ANX")))),undCons(lessdot(type("java.lang.Integer",null),type("java.lang.Integer",null)),undCons(lessdot(tph("_ANX"),tph("_N")), null))),orCons(undCons(equalsdot(tph("_F"),type("java.util.Vector",params(tph("_ANX")))),undCons(lessdot(type("java.lang.Integer",null),type("java.lang.Integer",null)),undCons(lessdot(tph("_ANX"),tph("_N")), null))),orCons(undCons(equalsdot(tph("_F"),type("Matrix",null)),undCons(lessdot(type("java.lang.Integer",null),type("java.lang.Integer",null)),undCons(lessdot(type("java.util.Vector",params(type("java.lang.Integer",null))),tph("_N")), null))), null)))).
+orCons(undCons(equalsdot(tph("_F"),type("Matrix",null)),undCons(lessdot(type("java.lang.Integer",null),type("java.lang.Integer",null)),undCons(lessdot(type("java.util.Vector",params(type("java.lang.Integer",null))),tph("_N")), null))),orCons(undCons(lessdot(type("java.lang.Integer",null),type("java.lang.Integer",null)),undCons(equalsdot(tph("_F"),type("Matrix",null)),undCons(lessdot(type("java.util.Vector",params(type("java.lang.Integer",null))),tph("_N")), null))),orCons(undCons(equalsdot(tph("_F"),type("java.util.Vector",params(tph("_ANZ")))),undCons(lessdot(type("java.lang.Integer",null),type("java.lang.Integer",null)),undCons(lessdot(tph("_ANZ"),tph("_N")), null))),orCons(undCons(equalsdot(tph("_F"),type("java.util.Vector",params(tph("_ANZ")))),undCons(lessdot(type("java.lang.Integer",null),type("java.lang.Integer",null)),undCons(lessdot(tph("_ANZ"),tph("_N")), null))), null)))).
+orCons(undCons(equalsdot(tph("_F"),type("Matrix",null)),undCons(lessdot(type("java.lang.Integer",null),type("java.lang.Integer",null)),undCons(lessdot(type("java.util.Vector",params(type("java.lang.Integer",null))),tph("_N")), null))),orCons(undCons(lessdot(tph("_AOB"),tph("_N")),undCons(lessdot(type("java.lang.Integer",null),type("java.lang.Integer",null)),undCons(equalsdot(tph("_F"),type("java.util.Vector",params(tph("_AOB")))), null))),orCons(undCons(lessdot(tph("_AOB"),tph("_N")),undCons(lessdot(type("java.lang.Integer",null),type("java.lang.Integer",null)),undCons(equalsdot(tph("_F"),type("java.util.Vector",params(tph("_AOB")))), null))),orCons(undCons(lessdot(type("java.lang.Integer",null),type("java.lang.Integer",null)),undCons(equalsdot(tph("_F"),type("Matrix",null)),undCons(lessdot(type("java.util.Vector",params(type("java.lang.Integer",null))),tph("_N")), null))), null)))).
+orCons(undCons(lessdot(type("java.lang.Boolean",null),tph("_R")),undCons(lessdot(tph("_N"),tph("_AOA")),undCons(equalsdot(tph("_S"),type("java.util.Vector",params(tph("_AOA")))), null))),orCons(undCons(lessdot(type("java.lang.Boolean",null),tph("_R")),undCons(lessdot(tph("_N"),tph("_ANW")),undCons(equalsdot(tph("_S"),type("java.util.List",params(tph("_ANW")))), null))),orCons(undCons(lessdot(type("java.lang.Boolean",null),tph("_R")),undCons(lessdot(tph("_N"),tph("_ANW")),undCons(equalsdot(tph("_S"),type("java.util.List",params(tph("_ANW")))), null))),orCons(undCons(lessdot(type("java.lang.Boolean",null),tph("_R")),undCons(lessdot(tph("_N"),tph("_AOA")),undCons(equalsdot(tph("_S"),type("java.util.Vector",params(tph("_AOA")))), null))),orCons(undCons(lessdot(type("java.lang.Boolean",null),tph("_R")),undCons(equalsdot(tph("_S"),type("Matrix",null)),undCons(lessdot(tph("_N"),type("java.util.Vector",params(type("java.lang.Integer",null)))), null))),orCons(undCons(lessdot(type("java.lang.Boolean",null),tph("_R")),undCons(equalsdot(tph("_S"),type("Matrix",null)),undCons(lessdot(tph("_N"),type("java.util.Vector",params(type("java.lang.Integer",null)))), null))),orCons(undCons(lessdot(type("java.lang.Boolean",null),tph("_R")),undCons(equalsdot(tph("_S"),type("java.util.AbstractList",params(tph("_ANY")))),undCons(lessdot(tph("_N"),tph("_ANY")), null))),orCons(undCons(lessdot(type("java.lang.Boolean",null),tph("_R")),undCons(equalsdot(tph("_S"),type("java.util.AbstractList",params(tph("_ANY")))),undCons(lessdot(tph("_N"),tph("_ANY")), null))), null)))))))).
+orCons(undCons(equalsdot(tph("_U"),type("java.lang.Integer",null)), null), null).
+orCons(undCons(lessdot(type("java.lang.Integer",null),type("java.lang.Integer",null)),undCons(lessdot(tph("_U"),type("java.lang.Integer",null)),undCons(equalsdot(type("java.lang.Integer",null),tph("_V")), null))), null).
+
+super(type("java.lang.Boolean",null),type("Object",null)):-super(type("java.lang.Boolean",null)).super(type("java.lang.Integer",null),type("java.lang.Number",null)):-super(type("java.lang.Integer",null)).super(type("java.lang.Number",null),type("Object",null)):-super(type("java.lang.Number",null)).super(type("java.util.Vector",params(XX)),type("Object",null)):-super(type("java.util.Vector",params(XX))).super(type("Matrix",null),type("java.util.Vector",params(type("java.util.Vector",params(type("java.lang.Integer",null)))))):-super(type("Matrix",null)).
+
+
+%%%%%
+
+super(type("MyPair", params(X, Y)), type("Pair", params(Y, X))) :- super(type("MyPair", params(X, Y))).
+super(type("ArrayList", params(X)), type("List", params(X))) :- super(type("ArrayList", params(X))).
+super(type("List", params(X)), type("Object", null)) :- super(type("List", params(X))).
+super(type("Integer", null), type("Object", null)) :- super(type("Integer", null)).
+super(type("Matrix", null), type("Vector", params(type("Vector", params(type("Integer", null)))))) :- super(type("Matrix", null)).
+super(type("Vector", params(X)), type("Object", null)) :- super(type("Vector", params(X))).
+
+% Subtyping
+super(A, A) :- super(A, B). % reflexive
+super(B) :- super(A, B). % transitive
+super(A, C) :- super(A, B), super(B, C). % transitive
+less(A,B) :- super(type(A, AP), type(B, BP)).
+
+% Or-Constraints
+undCons(A,B) :- orCons(undCons(A,B), null).
+undCons(A,B); orCons(C,D) :- orCons(undCons(A,B), orCons(C,D)).
+lessdot(A,B) :- undCons(lessdot(A,B), _).
+undCons(B,C) :- undCons(A, undCons(B, C)).
+
+% undCons
+lessdot(A,B) :- undCons(lessdot(A,B), _).
+undCons(C,D) :- undCons(_, undCons(C,D)).
+
+% substitution
+subst(tph(A), type(C,P)) :- equalsdot(tph(A), type(C,P)).
+subst(A) :- equalsdot(A, B).
+subst(B) :- equalsdot(A, B).
+equalsdot(B, C) :- subst(A,B), equalsdot(A, C).
+equalsdot(C, B) :- subst(A,B), equalsdot(C, A).
+subst(A) :- lessdot(A, B).
+subst(B) :- lessdot(A, B).
+lessdot(B, C) :- subst(A,B), lessdot(A, C).
+lessdot(C, B) :- subst(A,B), lessdot(C, A).
+subst(type(N, params(P)), type(N, params(S))) :- subst(type(N, params(P))), subst(P, S).
+
+% match
+super(C) :- lessdot(TPH, C).
+lessdot(C, D) :- lessdot(TPH, C), lessdot(TPH, D), super(C, D).
+
+% reduce
+equalsdot(AP, BP) :- equalsdot(type(A, params(AP)), type(A, params(BP))).
+
+equalsdot(AP, BP) :- equalsdot(type(A, params(AP, AP2)), type(A, params(BP, BP2))).
+equalsdot(AP2, BP2) :- equalsdot(type(A, params(AP, AP2)), type(A, params(BP, BP2))).
+
+equalsdot(AP, BP) :- equalsdot(type(A, params(AP, AP2, AP3)), type(A, params(BP, BP2, BP3))).
+equalsdot(AP2, BP2) :- equalsdot(type(A, params(AP, AP2, AP3)), type(A, params(BP, BP2, BP3))).
+equalsdot(AP3, BP3) :- equalsdot(type(A, params(AP, AP2, AP3)), type(A, params(BP, BP2, BP3))).
+
+% Swap
+equalsdot(tph(B),type(A, AP)) :- equalsdot(type(A, AP), tph(B)).
+
+% adapt
+super(type(C,CP)) :- lessdot(type(C,CP),type(D, DP)). % generate
+equalsdot(type(D, N), type(D, DP)) :- lessdot(type(C,CP),type(D, DP)), super(type(C, CP), type(D, N)).
+
+% adopt
+lessdot(tph(B), type(C, CP)) :- lessdot(tph(A), type(C, CP)), lessdot(tph(B), tph(A)).
+
+% step 2
+super(type(C, CP)) :- lessdot(type(C, CP), tph(A)).
+equalsdot(tph(A), type(C, CP)); lessdot(type(D, DP), tph(A)) :- lessdot(type(C, CP), tph(A)), super(type(C, CP), type(D, DP)).
+equalsdot(tph(A), type(C, CP)) :- lessdot(type(C, CP), tph(A)), not super(type(C, CP),_).
+
+% a <. C , a <. b constraints:
+lessdot(tph(B), type(C, CP)); lessdot(type(C, CP), tph(B)) :- lessdot(tph(A), type(C, CP)), lessdot(tph(A), tph(B)).
+
+% errors
+tphs( P ) :- equalsdot(tph(A), type(C, P)).
+tphs(tph(P), params(tph(P))) :- tphs( params(tph(P))).
+tphs(P) :- tphs( params(type(C, P))).
+tphs(tph(A), params(type(C, P))) :- tphs( params(type(C, P))), tphs(tph(A), P).
+
+tphs(tph(P), params(X, tph(P))) :- tphs( params(X, tph(P))).
+tphs(tph(P), params(tph(P), X)) :- tphs( params(tph(P), X)).
+tphs(P) :- tphs( params(X, type(C, P))).
+tphs(P) :- tphs( params(type(C, P), X)).
+tphs(tph(A), params(X, type(C, P))) :- tphs( params(X, type(C, P))), tphs(tph(A), P).
+tphs(tph(A), params(type(C, P), X)) :- tphs( params(type(C, P), X)), tphs(tph(A), P).
+
+:- equalsdot(tph(A), type(C, P)), tphs(tph(A), P). % fail for subst
+
+:- equalsdot(type(C, CP), type(D, DP)), C != D. % fail for reduce
+:- lessdot(type(C, CP), type(D, DP)),  not less(C, D). % fail for adapt
+:- lessdot(tph(A), type(D, DP)), lessdot(tph(A), type(C, CP)), not less(C, D), not less(D, C). %Fail for match
+
+% solve
+sigma(tph(A), type(C,P)) :- equalsdot(tph(A), type(C,P)).
+sigma2(tph(A), type(C,P)) :- lessdot(tph(A), type(C,P)), not sigma(tph(A), _).
+
+#show sigma2/2.
+#show sigma/2.
+%#show subst/2.

src/main/asp/unifyDiss.lp

@@ -0,0 +1,166 @@
+
+
+% Or-Constraints
+undCons(A,B) :- orCons(undCons(A,B), null).
+undCons(A,B); orCons(C,D) :- orCons(undCons(A,B), orCons(C,D)).
+
+
+% undCons
+subcons(A,B) :- undCons(subcons(A,B), _).
+undCons(C,D) :- undCons(_, undCons(C,D)).
+equalcons(A,B) :- undCons(equalcons(A,B), _).
+undCons(B,C) :- undCons(A, undCons(B, C)).
+
+
+% Subtyping
+subtype(B, B) :- subtype(A, B). % reflexive
+subtype(A, A) :- subtype(A, B). % reflexive
+subtype(A, C) :- subtype(A, B), subtype(B, C). % transitive
+
+% we use subst to only replace tph's with real types:
+subst(tph(A), type(C, CP)):- equalcons(tph(A), type(C,CP)).
+
+% subst-L:
+subcons(B,C) :- subst(A, B), subcons(A, C).
+%subst-R:
+subcons(C,B) :- subst(A, B), subcons(C, A).
+%subst-Equal:
+equalcons(B,C) :- subst(A, B), equalcons(A, C).
+
+%swap:
+equalcons(A,B) :- equalcons(B,A).
+
+%unfold:
+equalcons(T, T) :- equalcons(_, type(_, params(T))).
+equalcons(T, T) :- equalcons(_, type(_, params(T, _))).
+equalcons(T, T) :- equalcons(_, type(_, params(_, T))).
+equalcons(T, T) :- equalcons(_, type(_, params(T, _, _))).
+equalcons(T, T) :- equalcons(_, type(_, params(_, T, _))).
+equalcons(T, T) :- equalcons(_, type(_, params(_, _, T))).
+
+%unfold-Right:
+equalcons(T, T) :- subcons(_, type(_, params(T))).
+equalcons(T, T) :- subcons(_, type(_, params(T, _))).
+equalcons(T, T) :- subcons(_, type(_, params(_, T))).
+equalcons(T, T) :- subcons(_, type(_, params(T, _, _))).
+equalcons(T, T) :- subcons(_, type(_, params(_, T, _))).
+equalcons(T, T) :- subcons(_, type(_, params(_, _, T))).
+
+
+%unfold-Left:
+equalcons(T, T) :- subcons(type(_, params(T)), _).
+equalcons(T, T) :- subcons(type(_, params(T, _)), _).
+equalcons(T, T) :- subcons(type(_, params(_, T)), _).
+equalcons(T, T) :- subcons(type(_, params(T, _, _)), _).
+equalcons(T, T) :- subcons(type(_, params(_, T, _)), _).
+equalcons(T, T) :- subcons(type(_, params(_, _, T)), _).
+
+% Subst-Param:
+subcons(A, type(C, params(T2))) :- subcons(A, type(C, params(T))), subst(T, T2).
+subcons(A, type(C, params(T2, P2))) :- subcons(A, type(C, params(T, P2))), subst(T, T2).
+subcons(A, type(C, params(P1, T2))) :- subcons(A, type(C, params(P1, T))), subst(T, T2).
+subcons(A, type(C, params(T2, P2, P3))) :- subcons(A, type(C, params(T, P2, P3))), subst(T, T2).
+subcons(A, type(C, params(P1, T2, P3))) :- subcons(A, type(C, params(P1, T, P3))), subst(T, T2).
+subcons(A, type(C, params( P1, P2, T2))) :- subcons(A, type(C, params(P1, P2, T))), subst(T, T2).
+
+% Subst-Param':
+subcons(A, type(C, params(T2))) :- equalcons(A, type(C, params(T))), subst(T, T2).
+subcons(A, type(C, params(T2, P2))) :- equalcons(A, type(C, params(T, P2))), subst(T, T2).
+subcons(A, type(C, params(P1, T2))) :- equalcons(A, type(C, params(P1, T))), subst(T, T2).
+subcons(A, type(C, params(T2, P2, P3))) :- equalcons(A, type(C, params(T, P2, P3))), subst(T, T2).
+subcons(A, type(C, params(P1, T2, P3))) :- equalcons(A, type(C, params(P1, T, P3))), subst(T, T2).
+subcons(A, type(C, params( P1, P2, T2))) :- equalcons(A, type(C, params(P1, P2, T))), subst(T, T2).
+
+% adapt
+equalcons(type(D,P3), type(D,P2)) :- subcons(type(C,P), type(D, P2)), subtype(type(C, P), type(D, P3)).
+%subtype(type(A, P)) :- subcons(type(_, _), type(A, P)).
+subtype(type(A, P)) :- subcons(type(A, P), _). 
+
+% reduce
+equalcons(P1, PP1) :- equalcons(type(C, params(P1)), type(C, params(PP1))).
+equalcons(P1, PP1) :- equalcons(type(C, params(P1, P2)), type(C, params(PP1, PP2))).
+equalcons(P2, PP2) :- equalcons(type(C, params(P1, P2)), type(C, params(PP1, PP2))).
+equalcons(P1, PP1) :- equalcons(type(C, params(P1, P2, P3)), type(C, params(PP1, PP2, PP3))).
+equalcons(P2, PP2) :- equalcons(type(C, params(P1, P2, P3)), type(C, params(PP1, PP2, PP3))).
+equalcons(P3, PP3) :- equalcons(type(C, params(P1, P2, P3)), type(C, params(PP1, PP2, PP3))).
+
+% super 
+{ equalcons(tph(A), type(D, DP)):  subtype(type(C, CP), type(D, DP)) } == 1 :- subcons(type(C, CP), tph(A)).
+% equalcons(tph(A), type(D, DP)) ; notequals(tph(A), type(D, DP)) :- subcons(type(C, CP), tph(A)), subtype(type(C, CP), type(D, DP)).
+% equalcons(tph(A), type(D, CP)) :- subcons(type(C, CP), tph(A)), subtype(type(C, CP), type(D, DP)).
+
+
+%Solution:
+tphs( P ) :- equalcons(tph(A), type(C, P)).
+sigma(tph(A), type(C,P)) :- equalcons(tph(A), type(C, P)), not tphs(_, P).
+
+%Solution-Gen:
+equalcons(tph(A), type(C, CP)) ; nothingFor(tph(A), type(C, CP)) :- subcons(tph(A), type(C, CP)).
+
+%Solution-Requirement:
+ :- nothingFor(tph(A), _), not equalcons(tph(A), _).
+
+% Fail-Subtype:
+%   G1 <. G2, G1 </: G2  ==>  fail        (G1, G2 ground, i.e. free of type placeholders)
+% Once Solution-Gen has assigned a type to a placeholder, subst-L/subst-R rewrite every
+% constraint mentioning it into one over the substituted types, so a wrong assignment surfaces as
+% a subcons/2 between two ground types: solving `_a <. java.lang.Boolean` with java.lang.Object
+% derives `subcons(type("java.lang.Object",null), type("java.lang.Boolean",null))`. A ground
+% constraint is decidable - it holds iff the class hierarchy says so - and nothing checked it so
+% far, which is what let a placeholder be solved with a type violating its own upper bounds.
+% The restriction to ground terms is required for soundness, not an optimisation: a constraint
+% still containing a placeholder, such as Box<_a> <. Box<_b>, cannot be validated before those
+% placeholders are substituted.
+ :- subcons(S, T), groundType(S), groundType(T), not subtype(S, T).
+
+% groundType(T): type term T occurs in the constraint set and contains no type placeholder.
+groundType(T) :- typeTerm(T), not containsTph(T).
+
+containsTph(tph(A)) :- typeTerm(tph(A)).
+containsTph(type(C, params(P1))) :- typeTerm(type(C, params(P1))), containsTph(P1).
+containsTph(type(C, params(P1, P2))) :- typeTerm(type(C, params(P1, P2))), containsTph(P1).
+containsTph(type(C, params(P1, P2))) :- typeTerm(type(C, params(P1, P2))), containsTph(P2).
+containsTph(type(C, params(P1, P2, P3))) :- typeTerm(type(C, params(P1, P2, P3))), containsTph(P1).
+containsTph(type(C, params(P1, P2, P3))) :- typeTerm(type(C, params(P1, P2, P3))), containsTph(P2).
+containsTph(type(C, params(P1, P2, P3))) :- typeTerm(type(C, params(P1, P2, P3))), containsTph(P3).
+
+% Every type term occurring in a constraint, including the ones nested in type parameters.
+typeTerm(S) :- subcons(S, _).
+typeTerm(T) :- subcons(_, T).
+typeTerm(S) :- equalcons(S, _).
+typeTerm(T) :- equalcons(_, T).
+typeTerm(P1) :- typeTerm(type(_, params(P1))).
+typeTerm(P1) :- typeTerm(type(_, params(P1, _))).
+typeTerm(P2) :- typeTerm(type(_, params(_, P2))).
+typeTerm(P1) :- typeTerm(type(_, params(P1, _, _))).
+typeTerm(P2) :- typeTerm(type(_, params(_, P2, _))).
+typeTerm(P3) :- typeTerm(type(_, params(_, _, P3))).
+
+% S-Object
+subcons(tph(A), type("java.lang.Object", null)) :- subcons(tph(A), _).
+subcons(tph(A), type("java.lang.Object", null)) :- subcons(_, tph(A)).
+subcons(tph(A), type("java.lang.Object", null)) :- equalcons(tph(A), _).
+
+%% Helpers
+%tphs:
+tphs(tph(P), params(tph(P))) :- tphs( params(tph(P))).
+tphs(P) :- tphs( params(type(C, P))).
+tphs(tph(A), params(type(C, P))) :- tphs( params(type(C, P))), tphs(tph(A), P).
+
+tphs(tph(P), params(X, tph(P))) :- tphs( params(X, tph(P))).
+tphs(tph(P), params(tph(P), X)) :- tphs( params(tph(P), X)).
+tphs(P) :- tphs( params(X, type(C, P))).
+tphs(P) :- tphs( params(type(C, P), X)).
+tphs(tph(A), params(X, type(C, P))) :- tphs( params(X, type(C, P))), tphs(tph(A), P).
+tphs(tph(A), params(type(C, P), X)) :- tphs( params(type(C, P), X)), tphs(tph(A), P).
+
+
+tphs(tph(P), params(tph(P), X, Y)) :- tphs( params(tph(P), X, Y)).
+tphs(tph(P), params(X, tph(P), Y)) :- tphs( params(X, tph(P), Y)).
+tphs(tph(P), params(X,Y,tph(P))) :- tphs( params(X, Y, tph(P))).
+tphs(P) :- tphs( params(type(C, P), X, Y)).
+tphs(P) :- tphs( params(X, type(C, P),Y)).
+tphs(P) :- tphs( params(X,Y,type(C, P))).
+tphs(tph(A), params(type(C, P), X, Y)) :- tphs( params(type(C, P), X, Y)), tphs(tph(A), P).
+tphs(tph(A), params(X, type(C, P), Y)) :- tphs( params(X, type(C, P), Y)), tphs(tph(A), P).
+tphs(tph(A), params(X, Y, type(C, P))) :- tphs( params(X, Y, type(C, P))), tphs(tph(A), P).

src/main/asp/unifyFinal.lp

@@ -0,0 +1,426 @@
+%==============================================================================================
+% unifyFinal.lp - global type inference for Java by unification, as an Answer Set Program.
+%
+% Source: the program printed in dissertation/chapters/unifyWithASP.tex, section
+%   "ASP Program + Example Input" (\label{appendix:program}), transcribed verbatim except that
+%   its embedded "% TEST INPUT" constraint set and its trailing "#show sigma/2." are left out
+%   (show.lp provides the latter), and one rule is added - see Fail-Equals in PART 2.
+%
+% Rule names in CAPITALS refer to the inference rules of
+%   Figure "Unify Algorithm" (\label{fig:aspUnifyAlgorithm}) and
+%   Figure "Subtyping"       (\label{fig:aspSubtyping}).
+%
+% Notation used in the paper and mirrored here:
+%   a, b        type placeholders            tph("_a")
+%   G           a *ground* type - one containing no placeholder anywhere
+%   N, C<...>   a class type                 type("java.util.List", params(...))
+%   T <. T'     subtype constraint           subcons(T, T')
+%   T =. T'     equality constraint          equalcons(T, T')
+%   T <: T'     the Java subtype relation    subtype(T, T')
+%   sigma(a)    the computed unifier         sigma(tph("_a"), type(...))
+%
+% File layout:
+%   PART 1  Input: constraint set, or-constraints, extends relations, subtyping
+%   PART 2  The algorithm: one section per rule of the paper
+%   PART 3  Helpers: depth, groundness, placeholder occurrence
+%==============================================================================================
+
+
+%==============================================================================================
+% PART 1 - INPUT
+%==============================================================================================
+%
+% Everything in this part turns the facts emitted by JavaTypeUnifyASP's `gen-facts` command into
+% the two constraint predicates the algorithm works on (subcons/2, equalcons/2) plus the Java
+% subtype relation (subtype/2).
+%
+% ---------------------------------------------------------------------------------------------
+% What the input looks like
+% ---------------------------------------------------------------------------------------------
+% JavaConstraintGenerator writes a textual .cons file; `gen-facts` parses it (grammar:
+% src/main/antlr4/.../ConstraintSet.g4) and emits ASP facts. A .cons file has three kinds of line:
+%
+%   Sub < Super                     an extends/implements edge, type arguments included
+%   T <. T'                         a subtype constraint
+%   { a, b | c, d }                 an or-constraint: at least one alternative, all of its parts
+%
+% Types are written `java.util.List<java.lang.Integer>` and placeholders `_Foo_3`. These become:
+%
+%   type("java.util.List", params(type("java.lang.Integer", null)))     a class type
+%   type("java.lang.Integer", null)                                     no type arguments
+%   tph("_Foo_3")                                                       a type placeholder
+%
+% A simple constraint `_Foo_3 <. java.lang.Number` is emitted as a one-element or-constraint:
+%
+%   orCons(undCons(subcons(tph("_Foo_3"), type("java.lang.Number",null)), null), null).
+%
+% so there is exactly one shape to unpack, whether or not the constraint had alternatives.
+% An or-constraint nests: orCons(<alternative>, orCons(<alternative>, ... null)), and each
+% alternative is a chain undCons(<constraint>, undCons(<constraint>, ... null)).
+%
+% ---------------------------------------------------------------------------------------------
+% Where the extends relations come from
+% ---------------------------------------------------------------------------------------------
+% They are not facts of this program; they are supplied per run, exactly like the constraint set.
+% JavaConstraintGenerator reads them off the analysed Java sources (`class C extends D`,
+% `implements E`) and off the JDK/library classes it reflects, walking up until every ancestor is
+% covered. Each edge keeps its type arguments, and ASPGenerator emits it as a *guarded rule*, not
+% a fact - realizing S-CLASS of Figure "Subtyping":
+%
+%     class C<X> extends D<X>
+%       ==>  subtype(type("C", params(XX)), type("D", params(XX)))
+%              :- subtype(type("C", params(XX))).
+%
+% Two things make the guard necessary rather than decorative:
+%   - it *binds* XX. A bare fact with a free variable is not safe and clingo rejects it.
+%   - it instantiates the edge lazily, only for the type arguments a given run actually mentions.
+% Note the head is subtype/2 and the body subtype/1 - different predicates, so this is not a
+% self-referential rule. subtype/1 is derived below from the constraints.
+%
+% Because the edges arrive as rules, `Matrix < java.util.Vector<java.util.Vector<java.lang.Integer>>`
+% is what lets ADAPT resolve `Matrix <. java.util.Vector<X>` to X = Vector<Integer>. An *erased*
+% edge would give a subtype/2 fact that no parameterized occurrence can ever match.
+%==============================================================================================
+
+% ---------------------------------------------------------------------------------------------
+% Or-constraints: choose exactly one alternative, then take all of its conjuncts.
+% This is the ASP encoding of the constraint set's disjunctive structure; the paper treats a
+% constraint set as already-chosen and does not name a rule for it.
+% ---------------------------------------------------------------------------------------------
+% One alternative left in the chain: it is forced.
+undCons(A,B) :- orCons(undCons(A,B), null).
+% More than one: pick this alternative, or move on to the rest. Exactly one is chosen.
+{ undCons(A,B); orCons(C,D) } == 1 :- orCons(undCons(A,B), orCons(C,D)).
+
+% Unpack the chosen alternative's conjunct chain into plain constraints.
+subcons(A,B) :- undCons(subcons(A,B), _).
+equalcons(A,B) :- undCons(equalcons(A,B), _).
+undCons(C,D) :- undCons(_, undCons(C,D)).
+undCons(B,C) :- undCons(A, undCons(B, C)).
+
+% ---------------------------------------------------------------------------------------------
+% Subtyping - Figure "Subtyping" (\label{fig:aspSubtyping}).
+% S-CLASS arrives as the generated rules described above; the closure is here.
+% ---------------------------------------------------------------------------------------------
+% Java: every reference type is a subtype of Object. Stated directly so that the last hop of any
+% chain is always one step from a type the constraints actually mention.
+subtype(A, type("java.lang.Object", null)):- subtype(A).
+
+% S-REFL:  T <: T
+subtype(A, A) :- subtype(A).
+subtype(A, A) :- subtype(A, B).
+% S-TRANS:  T1 <: T2, T2 <: T3  ==>  T1 <: T3
+subtype(B) :- subtype(A, B).
+subtype(A, C) :- subtype(A, B), subtype(B, C).
+
+% Erasure-level subtyping: the same relation with type arguments dropped. Used by Fail-Subtype
+% below, which is the one place the appendix compares class names only.
+namedSubtype(A,B) :- subtype(type(A, AP), type(B, BP)).
+
+% subtype/1 - "this type occurs in the constraint set", the guard that activates the generated
+% S-CLASS rules. Seeded from both sides of every subtype constraint.
+subtype(type(A, P)) :- subcons(_, type(A, P)).
+subtype(type(A, P)) :- subcons(type(A, P), _).
+
+
+%==============================================================================================
+% PART 2 - THE ALGORITHM
+% One section per inference rule of Figure "Unify Algorithm" (\label{fig:aspUnifyAlgorithm}).
+%==============================================================================================
+
+% ---------------------------------------------------------------------------------------------
+% SUBST - the substitution relation the four Subst-* rules below are phrased against.
+%
+% The paper writes every Subst rule with a *ground* type G on the right: `a =. G`. That
+% restriction is what keeps grounding finite - substituting a type that still contains a
+% placeholder can feed a placeholder's own solution back into itself and build ever-deeper terms
+% (see "Grounding bottleneck" in the chapter). It is enforced here by deriving subst from
+% sigma/2 rather than from equalcons/2: SOLUTION below only produces sigma for a type that
+% contains no placeholder.
+% ---------------------------------------------------------------------------------------------
+subst(tph(A), type(N,P)) :- sigma(tph(A), type(N, P)).
+
+% SUBST-L:      a =. G, a <. T   ==>  G <. T
+subcons(B,C) :- subst(A, B), subcons(A, C).
+% SUBST-R:      a =. G, T <. a   ==>  T <. G
+subcons(C,B) :- subst(A, B), subcons(C, A).
+% SUBST-EQUAL:  a =. G, a =. T   ==>  T =. G
+equalcons(B,C) :- subst(A, B), equalcons(A, C).
+
+% SWAP:  T1 =. T2  ==>  T2 =. T1
+equalcons(A,B) :- equalcons(B,A).
+
+% ---------------------------------------------------------------------------------------------
+% S-OBJECT:  a <. Object   for every placeholder a
+%
+% One rule per position a placeholder can occupy in a constraint - either side of <. and =., and
+% nested inside a type argument at any of the three supported arities. Giving every placeholder
+% at least one upper bound is what makes SOLUTION-GEN able to answer for it at all.
+% ---------------------------------------------------------------------------------------------
+subcons(tph(A), type("java.lang.Object", null)) :- subcons(tph(A), _).
+subcons(tph(A), type("java.lang.Object", null)) :- subcons(_, tph(A)).
+subcons(tph(A), type("java.lang.Object", null)) :- subcons(_, type(_, params(tph(A)))).
+subcons(tph(A), type("java.lang.Object", null)) :- subcons(_, type(_, params(tph(A), _))).
+subcons(tph(A), type("java.lang.Object", null)) :- subcons(_, type(_, params(_, tph(A)))).
+subcons(tph(A), type("java.lang.Object", null)) :- subcons(_, type(_, params(tph(A), _, _))).
+subcons(tph(A), type("java.lang.Object", null)) :- subcons(_, type(_, params(_, tph(A), _))).
+subcons(tph(A), type("java.lang.Object", null)) :- subcons(_, type(_, params(_, _, tph(A)))).
+subcons(tph(A), type("java.lang.Object", null)) :- subcons(type(_, params(tph(A))), _).
+subcons(tph(A), type("java.lang.Object", null)) :- subcons(type(_, params(tph(A), _)), _).
+subcons(tph(A), type("java.lang.Object", null)) :- subcons(type(_, params(_, tph(A))), _).
+subcons(tph(A), type("java.lang.Object", null)) :- subcons(type(_, params(tph(A), _, _)), _).
+subcons(tph(A), type("java.lang.Object", null)) :- subcons(type(_, params(tph(A), _, _)), _).
+subcons(tph(A), type("java.lang.Object", null)) :- subcons(type(_, params(_, tph(A), _)), _).
+subcons(tph(A), type("java.lang.Object", null)) :- subcons(type(_, params(_, _, tph(A))), _).
+subcons(tph(A), type("java.lang.Object", null)) :- equalcons(tph(A), _).
+subcons(tph(A), type("java.lang.Object", null)) :- equalcons(_, tph(A)).
+subcons(tph(A), type("java.lang.Object", null)) :- equalcons(_, type(_, params(tph(A)))).
+subcons(tph(A), type("java.lang.Object", null)) :- equalcons(_, type(_, params(tph(A), _))).
+subcons(tph(A), type("java.lang.Object", null)) :- equalcons(_, type(_, params(_, tph(A)))).
+subcons(tph(A), type("java.lang.Object", null)) :- equalcons(_, type(_, params(tph(A), _, _))).
+subcons(tph(A), type("java.lang.Object", null)) :- equalcons(_, type(_, params(_, tph(A), _))).
+subcons(tph(A), type("java.lang.Object", null)) :- equalcons(_, type(_, params(_, _, tph(A)))).
+subcons(tph(A), type("java.lang.Object", null)) :- equalcons(type(_, params(tph(A))), _).
+subcons(tph(A), type("java.lang.Object", null)) :- equalcons(type(_, params(tph(A), _)), _).
+subcons(tph(A), type("java.lang.Object", null)) :- equalcons(type(_, params(_, tph(A))), _).
+subcons(tph(A), type("java.lang.Object", null)) :- equalcons(type(_, params(tph(A), _, _)), _).
+subcons(tph(A), type("java.lang.Object", null)) :- equalcons(type(_, params(tph(A), _, _)), _).
+subcons(tph(A), type("java.lang.Object", null)) :- equalcons(type(_, params(_, tph(A), _)), _).
+subcons(tph(A), type("java.lang.Object", null)) :- equalcons(type(_, params(_, _, tph(A))), _).
+
+% ---------------------------------------------------------------------------------------------
+% SUBST-PARAM:        a =. G, T =. C<P1..a..Pn>  ==>  T =. C<P1..G..Pn>
+% SUBST-PARAM-RIGHT:  a =. G, b <. C<T1..a..Tn>  ==>  b <. C<P1..G..Pn>
+%
+% Substitution *inside* a type argument, one rule per parameter position (arities one to three -
+% see "Fixed Arity for Parameter Lists"). SUBST-PARAM-LEFT of the figure, which rewrites the left
+% operand of a <., has no counterpart here.
+%
+% Each firing makes a type one level deeper, so a cyclic assignment such as a =. List<a> would
+% nest without bound. FAIL-CYCLE below rules such cycles out, but clingo grounds before it
+% evaluates any integrity constraint, so the grounder would diverge first. The maxdepth guard is
+% what keeps grounding finite; depth/2 is defined in PART 3.
+% ---------------------------------------------------------------------------------------------
+maxdepth(5). 
+
+equalcons(A, type(C, params(T2))) :- equalcons(A, type(C, params(T))), subst(T, T2), depth(T2, D), maxdepth(Dmax), D < Dmax.
+equalcons(A, type(C, params(T2, P2))) :- equalcons(A, type(C, params(T, P2))), subst(T, T2), depth(T2, D), maxdepth(Dmax), D < Dmax.
+equalcons(A, type(C, params(P1, T2))) :- equalcons(A, type(C, params(P1, T))), subst(T, T2), depth(T2, D), maxdepth(Dmax), D < Dmax.
+equalcons(A, type(C, params(T2, P2, P3))) :- equalcons(A, type(C, params(T, P2, P3))), subst(T, T2), depth(T2, D), maxdepth(Dmax), D < Dmax.
+equalcons(A, type(C, params(P1, T2, P3))) :- equalcons(A, type(C, params(P1, T, P3))), subst(T, T2), depth(T2, D), maxdepth(Dmax), D < Dmax.
+equalcons(A, type(C, params( P1, P2, T2))) :- equalcons(A, type(C, params(P1, P2, T))), subst(T, T2), depth(T2, D), maxdepth(Dmax), D < Dmax.
+
+subcons(A, type(C, params(T2))) :- subcons(A, type(C, params(T))), subst(T, T2), depth(T2, D), maxdepth(Dmax), D < Dmax.
+subcons(A, type(C, params(T2, P2))) :- subcons(A, type(C, params(T, P2))), subst(T, T2), depth(T2, D), maxdepth(Dmax), D < Dmax.
+subcons(A, type(C, params(P1, T2))) :- subcons(A, type(C, params(P1, T))), subst(T, T2), depth(T2, D), maxdepth(Dmax), D < Dmax.
+subcons(A, type(C, params(T2, P2, P3))) :- subcons(A, type(C, params(T, P2, P3))), subst(T, T2), depth(T2, D), maxdepth(Dmax), D < Dmax.
+subcons(A, type(C, params(P1, T2, P3))) :- subcons(A, type(C, params(P1, T, P3))), subst(T, T2), depth(T2, D), maxdepth(Dmax), D < Dmax.
+subcons(A, type(C, params( P1, P2, T2))) :- subcons(A, type(C, params(P1, P2, T))), subst(T, T2), depth(T2, D), maxdepth(Dmax), D < Dmax.
+
+% ---------------------------------------------------------------------------------------------
+% ADAPT:  N <. C<P1..Pn>, N <: C<P'1..P'n>  ==>  P1 =. P'1, ..., Pn =. P'n
+%
+% A class type constrained below a parameterized type must agree with that type argument for
+% argument, read off its position in the hierarchy. This is where an extends relation's type
+% arguments do their work: `Matrix <. Vector<X>` together with
+% `Matrix <: Vector<Vector<Integer>>` forces X = Vector<Integer>. The parameter equalities
+% themselves are extracted by REDUCE.
+% ---------------------------------------------------------------------------------------------
+equalcons(type(D,P3), type(D,P2)) :- subcons(type(C,P), type(D, P2)), subtype(type(C, P), type(D, P3)).
+
+% ---------------------------------------------------------------------------------------------
+% REDUCE:  C<P1..Pn> =. C<P'1..P'n>  ==>  Pi =. P'i
+% Same class on both sides: equate the arguments pairwise. One rule per position per arity.
+% ---------------------------------------------------------------------------------------------
+equalcons(P1, PP1) :- equalcons(type(C, params(P1)), type(C, params(PP1))).
+equalcons(P1, PP1) :- equalcons(type(C, params(P1, P2)), type(C, params(PP1, PP2))).
+equalcons(P2, PP2) :- equalcons(type(C, params(P1, P2)), type(C, params(PP1, PP2))).
+equalcons(P1, PP1) :- equalcons(type(C, params(P1, P2, P3)), type(C, params(PP1, PP2, PP3))).
+equalcons(P2, PP2) :- equalcons(type(C, params(P1, P2, P3)), type(C, params(PP1, PP2, PP3))).
+equalcons(P3, PP3) :- equalcons(type(C, params(P1, P2, P3)), type(C, params(PP1, PP2, PP3))).
+
+% ---------------------------------------------------------------------------------------------
+% SUPER:  N <. a, N <: N1..Nn  ==>  for one m: a =. Nm
+%
+% A placeholder with a class type as a *lower* bound must be one of that type's supertypes - the
+% solver picks which. Written as a cardinality constraint over the candidates, the ASP form of
+% the figure's "for one m" conclusion. If no subtype/2 fact matches N, the candidate set is empty
+% and "== 1" makes the program unsatisfiable - which is why the extends relations must cover
+% every type that appears as a lower bound.
+% ---------------------------------------------------------------------------------------------
+{ equalcons(tph(A), type(D, DP)):  subtype(type(C, CP), type(D, DP)) } == 1 :- subcons(type(C, CP), tph(A)).
+
+% ---------------------------------------------------------------------------------------------
+% SOLUTION-GEN:  a <. N, ...  ==>  for one m: a =. Nm
+% Offer each upper bound of a placeholder as a candidate assignment. A choice rule rather than a
+% cardinality one: the solver may take it or leave it here, and SOLUTION-REQUIREMENT below is
+% what insists that something is eventually chosen.
+% ---------------------------------------------------------------------------------------------
+{ equalcons(tph(A), type(T,P)) } :-  subcons(tph(A), type(T,P)).
+
+% SOLUTION-REQUIREMENT: every placeholder that occurs in a constraint must end up with a unifier.
+% Commented out in the figure - see the surrounding text, which discusses this formulation.
+:- subcons(tph(A), _), not sigma(tph(A), _).
+
+% ---------------------------------------------------------------------------------------------
+% SOLUTION:  a =. G  ==>  sigma(a) = G
+%
+% Only for a *ground* G: "not tphs(_, P)" rejects a type whose arguments still contain a
+% placeholder (tphs/2 is defined in PART 3). This single guard is also what restricts SUBST, and
+% with it every Subst-* rule, to placeholder-free types.
+% ---------------------------------------------------------------------------------------------
+tphs( P ) :- equalcons(tph(A), type(C, P)).
+sigma(tph(A), type(C,P)) :- equalcons(tph(A), type(C, P)), not tphs(_, P).
+
+% ---------------------------------------------------------------------------------------------
+% FAIL-SUBTYPE:  G1 <. G2, G1 not<: G2  ==>  fail
+%
+% Compares class *names* (namedSubtype), where the figure compares whole types. That reads like a
+% gap but is not one in practice, because ADAPT covers the arguments: given
+% Vector<String> <. Vector<Integer>, ADAPT plus S-REFL derive
+% Vector<String> =. Vector<Integer>, REDUCE splits that into String =. Integer, and FAIL-EQUALS
+% below rejects it on the differing head names. Verified - that constraint set is UNSATISFIABLE
+% with or without the added rule. No counterexample to the name-only form has been constructed;
+% if one exists it needs a ground pair that ADAPT cannot fire on.
+% ---------------------------------------------------------------------------------------------
+:- subcons(type(C, CP), type(D, DP)), not namedSubtype(C, D).
+
+% ---------------------------------------------------------------------------------------------
+% FAIL-EQUALS:  G1 =. G2, G1 != G2  ==>  fail
+%
+% The appendix implements this by comparing head class names only:
+% ---------------------------------------------------------------------------------------------
+:- equalcons(type(C, CP), type(D, DP)), C != D. 
+
+% THIS RULE IS THE ONE ADDITION TO THE APPENDIX PROGRAM: on ground terms the whole type can be
+% compared, type arguments included, which is what the figure's rule actually says.
+%
+% Where it earns its keep is *arity*, not argument values. Two types with the same class name but
+% different parameter counts are paired by neither rule above: the name-only rule sees C == C, and
+% REDUCE has no rule matching null against params(...), or params(P1) against params(P1,P2). So
+%     java.util.Vector =. java.util.Vector<java.lang.Integer>
+% is accepted by the appendix program and rejected here - see ../../../../test_input3/arity-mismatch.cons.
+% This is exactly the raw-versus-parameterized confusion that arises if extends relations are ever
+% emitted in both erased and parameterized form.
+%
+% Argument *values* are already handled without this rule, via ADAPT + REDUCE + the name-only
+% FAIL-EQUALS - see the note on FAIL-SUBTYPE above.
+%
+% The restriction to ground terms is required for soundness, not an optimisation - Box<a> =. Box<b>
+% is perfectly satisfiable and must not be rejected before a and b have been substituted.
+% groundType/1 is defined in PART 3.
+ :- equalcons(S, T), groundType(S), groundType(T), S != T.
+
+% ---------------------------------------------------------------------------------------------
+% Anti Cycle Conditions - BUILD, CONNECT, FAIL-CYCLE.
+%
+% BUILD:       a =. C<..b..>  ==>  a -> b
+% CONNECT:     a -> b, b -> c ==>  a -> c
+% FAIL-CYCLE:  a -> a         ==>  fail
+%
+% An assignment whose right-hand side contains the placeholder being assigned has no finite
+% solution. Note these are integrity constraints, so they are only evaluated *after* grounding -
+% the maxdepth guard on SUBST-PARAM is what gets the program that far.
+% ---------------------------------------------------------------------------------------------
+connected(A,B) :- equalcons(tph(A), type(_,params(tph(B)))).
+connected(A,B) :- equalcons(tph(A), type(_,params(tph(B),_))).
+connected(A,B) :- equalcons(tph(A), type(_,params(_,tph(B)))).
+connected(A,B) :- equalcons(tph(A), type(_,params(tph(B),_,_))).
+connected(A,B) :- equalcons(tph(A), type(_,params(_,tph(B),_))).
+connected(A,B) :- equalcons(tph(A), type(_,params(_,_,tph(B)))).
+
+% CONNECT. The appendix prints this as `connected(A,C) :- connected(A,B), connected(A,C).`, whose
+% second body literal repeats the head instead of chaining through B - as printed it derives
+% nothing, leaving FAIL-CYCLE able to catch only *direct* self-reference (a =. C<..a..>) and not
+% a -> b -> a. Corrected here to the figure's rule, `a -> b, b -> c ==> a -> c`.
+%
+% Note this is a correctness backstop only. FAIL-CYCLE is an integrity constraint, so it runs
+% after grounding - and on a cyclic constraint set grounding is exactly what does not terminate.
+% cycleCheck.lp is what catches those, before the solve.
+connected(A,C) :- connected(A,B), connected(B,C).
+
+% FAIL-CYCLE.
+:- connected(A,A).
+
+
+%==============================================================================================
+% PART 3 - HELPERS
+% No counterpart in the paper; these compute the side conditions its rules are stated with.
+%==============================================================================================
+
+% ---------------------------------------------------------------------------------------------
+% depth/1 and depth/2 - the nesting depth of a type, used only by SUBST-PARAM's maxdepth guard.
+%
+% depth/1 marks a term as one whose depth is worth computing; it is seeded from the substituted
+% types and pushed down into type arguments, so the measurement is confined to terms that can
+% actually reach a Subst-Param rule. depth/2 then reports a depth for each such term: 0 for a
+% type with no arguments, and for a parameterized type the sum of its arguments' depths plus one.
+% (A sum rather than a maximum, so a wide type counts as deeper than a narrow one of the same
+% nesting - a coarser bound than the name "depth" suggests, but a finite one, which is the point.)
+% ---------------------------------------------------------------------------------------------
+depth(T2) :- subst(T, T2).
+depth(T2) :- subst(_, T2).
+depth(T) :- depth(type(A, params(T))).
+depth(T) :- depth(type(A, params(T, T1))).
+depth(T1) :- depth(type(A, params(T, T1))).
+depth(T) :- depth(type(A, params(T, T1, T2))).
+depth(T1) :- depth(type(A, params(T, T1, T2))).
+depth(T2) :- depth(type(A, params(T, T1, T2))).
+
+depth(type(A, null), 0) :- depth(type(A, null)).
+depth(type(A, params(T)), D+1) :- depth(type(A, params(T))), depth(T, D).
+depth(type(A, params(T, T1)), D+D1+1) :- depth(type(A, params(T, T1))), depth(T, D), depth(T1, D1).
+depth(type(A, params(T, T1, T2)), D+D1+D2+1) :- depth(type(A, params(T, T1, T2))), depth(T, D), depth(T1, D1), depth(T2, D2).
+
+% ---------------------------------------------------------------------------------------------
+% groundType/1 - the paper's G: a type term occurring in the constraint set that contains no
+% placeholder at any depth. Used by the added Fail-Equals rule.
+%
+% Defined positively - built up from argument-free types rather than as
+% "typeTerm(T), not containsTph(T)" - so the grounder can evaluate it bottom-up. Phrased with
+% negation it would sit in a negative cycle through subcons/2 and the grounder would have to
+% assume it might hold for every term, which makes it useless as a guard.
+% ---------------------------------------------------------------------------------------------
+groundType(type(C, null)) :- typeTerm(type(C, null)).
+groundType(type(C, params(P1))) :- typeTerm(type(C, params(P1))), groundType(P1).
+groundType(type(C, params(P1, P2))) :- typeTerm(type(C, params(P1, P2))), groundType(P1), groundType(P2).
+groundType(type(C, params(P1, P2, P3))) :- typeTerm(type(C, params(P1, P2, P3))), groundType(P1), groundType(P2), groundType(P3).
+
+% typeTerm/1 - every type term occurring anywhere in a constraint, including nested arguments.
+typeTerm(S) :- subcons(S, _).
+typeTerm(T) :- subcons(_, T).
+typeTerm(S) :- equalcons(S, _).
+typeTerm(T) :- equalcons(_, T).
+typeTerm(P1) :- typeTerm(type(_, params(P1))).
+typeTerm(P1) :- typeTerm(type(_, params(P1, _))).
+typeTerm(P2) :- typeTerm(type(_, params(_, P2))).
+typeTerm(P1) :- typeTerm(type(_, params(P1, _, _))).
+typeTerm(P2) :- typeTerm(type(_, params(_, P2, _))).
+typeTerm(P3) :- typeTerm(type(_, params(_, _, P3))).
+
+% ---------------------------------------------------------------------------------------------
+% tphs/1 and tphs/2 - "this parameter list contains a placeholder", the side condition SOLUTION
+% uses to accept only ground types. tphs(P) marks a parameter list under inspection; tphs(A, P)
+% says placeholder A occurs somewhere in P. One rule per position per arity, recursing through
+% nested class types.
+% ---------------------------------------------------------------------------------------------
+tphs(tph(P), params(tph(P))) :- tphs( params(tph(P))).
+tphs(P) :- tphs( params(type(C, P))).
+tphs(tph(A), params(type(C, P))) :- tphs( params(type(C, P))), tphs(tph(A), P).
+
+tphs(tph(P), params(X, tph(P))) :- tphs( params(X, tph(P))).
+tphs(tph(P), params(tph(P), X)) :- tphs( params(tph(P), X)).
+tphs(P) :- tphs( params(X, type(C, P))).
+tphs(P) :- tphs( params(type(C, P), X)).
+tphs(tph(A), params(X, type(C, P))) :- tphs( params(X, type(C, P))), tphs(tph(A), P).
+tphs(tph(A), params(type(C, P), X)) :- tphs( params(type(C, P), X)), tphs(tph(A), P).
+
+tphs(tph(P), params(tph(P), X, Y)) :- tphs( params(tph(P), X, Y)).
+tphs(tph(P), params(X, tph(P), Y)) :- tphs( params(X, tph(P), Y)).
+tphs(tph(P), params(X,Y,tph(P))) :- tphs( params(X, Y, tph(P))).
+tphs(P) :- tphs( params(type(C, P), X, Y)).
+tphs(P) :- tphs( params(X, type(C, P),Y)).
+tphs(P) :- tphs( params(X,Y,type(C, P))).
+tphs(tph(A), params(type(C, P), X, Y)) :- tphs( params(type(C, P), X, Y)), tphs(tph(A), P).
+tphs(tph(A), params(X, type(C, P), Y)) :- tphs( params(X, type(C, P), Y)), tphs(tph(A), P).
+tphs(tph(A), params(X, Y, type(C, P))) :- tphs( params(X, Y, type(C, P))), tphs(tph(A), P).

src/main/asp/unifyOrCons.lp

@@ -0,0 +1,153 @@
+% TEST INPUT
+%orCons(undCons(subcons(tph("_b"),type("java.security.Permission",null)),undCons(subcons(tph("_a"),type("java.util.PropertyPermissionCollection",null)), null)),orCons(undCons(subcons(tph("_a"),type("sun.java2d.marlin.stats.Histogram",null)),undCons(subcons(tph("_b"),type("int",null)), null)),orCons(undCons(subcons(tph("_a"),type("com.sun.jndi.ldap.LdapAttribute",null)),undCons(subcons(tph("_b"),type("java.lang.Object",null)), null)),orCons(undCons(subcons(tph("_b"),type("java.math.BigInteger",null)),undCons(subcons(tph("_a"),type("java.math.BigInteger",null)), null)),orCons(undCons(subcons(tph("_a"),type("com.sun.org.apache.xerces.internal.impl.xs.XSModelImpl$XSNamespaceItemListIterator",null)),undCons(subcons(tph("_b"),type("java.lang.Object",null)), null)),orCons(undCons(subcons(tph("_b"),type("com.sun.org.apache.xml.internal.security.keys.storage.StorageResolverSpi",null)),undCons(subcons(tph("_a"),type("com.sun.org.apache.xml.internal.security.keys.storage.StorageResolver",null)), null)),orCons(undCons(subcons(tph("_b"),tph("_E")),undCons(subcons(tph("_a"),type("java.util.AbstractList",null)), null)),orCons(undCons(subcons(tph("_b"),tph("_E")),undCons(subcons(tph("_a"),type("java.util.HashSet",null)), null)),orCons(undCons(subcons(tph("_b"),type("sun.security.util.math.IntegerModuloP",null)),undCons(subcons(tph("_a"),type("sun.security.util.math.intpoly.IntegerPolynomial$Element",null)), null)),orCons(undCons(subcons(tph("_b"),type("java.awt.geom.Point2D",null)),undCons(subcons(tph("_a"),type("java.awt.geom.Rectangle2D",null)), null)),orCons(undCons(subcons(tph("_b"),tph("_E")),undCons(subcons(tph("_a"),type("java.util.AbstractQueue",null)), null)),orCons(undCons(subcons(tph("_b"),type("double",null)),undCons(subcons(tph("_a"),type("java.util.concurrent.atomic.DoubleAdder",null)), null)),orCons(undCons(subcons(tph("_b"),tph("_E")),undCons(subcons(tph("_a"),type("java.util.Collections$AsLIFOQueue",null)), null)),orCons(undCons(subcons(tph("_b"),type("com.sun.org.apache.xml.internal.security.keys.content.keyvalues.DSAKeyValue",null)),undCons(subcons(tph("_a"),type("com.sun.org.apache.xml.internal.security.keys.KeyInfo",null)), null)),orCons(undCons(subcons(tph("_b"),tph("_E")),undCons(subcons(tph("_a"),type("java.util.Collections$EmptyListIterator",null)), null)),orCons(undCons(subcons(tph("_b"),tph("_E")),undCons(subcons(tph("_a"),type("java.util.AbstractList$ListItr",null)), null)),orCons(undCons(subcons(tph("_b"),type("java.math.BigDecimal",null)),undCons(subcons(tph("_a"),type("java.math.BigDecimal",null)), null)),orCons(undCons(subcons(tph("_b"),tph("_E")),undCons(subcons(tph("_a"),type("java.util.Collections$CheckedList$1",null)), null)),orCons(undCons(subcons(tph("_a"),type("sun.security.provider.PolicyParser",null)),undCons(subcons(tph("_b"),type("sun.security.provider.PolicyParser$GrantEntry",null)), null)),orCons(undCons(subcons(tph("_a"),type("sun.swing.AccumulativeRunnable",null)),undCons(subcons(tph("_b"),tph("_T_array")), null)),orCons(undCons(subcons(tph("_a"),type("com.sun.jmx.remote.internal.ArrayQueue",null)),undCons(subcons(tph("_b"),tph("_T")), null)),orCons(undCons(subcons(tph("_b"),type("javax.management.relation.Role",null)),undCons(subcons(tph("_a"),type("javax.management.relation.RoleList",null)), null)),orCons(undCons(subcons(tph("_b"),type("com.sun.org.apache.xml.internal.security.keys.content.x509.XMLX509SKI",null)),undCons(subcons(tph("_a"),type("com.sun.org.apache.xml.internal.security.keys.content.X509Data",null)), null)),orCons(undCons(subcons(tph("_b"),type("javax.xml.datatype.Duration",null)),undCons(subcons(tph("_a"),type("javax.xml.datatype.XMLGregorianCalendar",null)), null)),orCons(undCons(subcons(tph("_a"),type("java.util.concurrent.ConcurrentHashMap$EntrySetView",null)),undCons(subcons(tph("_b"),type("java.lang.Object",null)), null)),orCons(undCons(subcons(tph("_b"),type("com.sun.org.apache.xml.internal.security.keys.content.x509.XMLX509IssuerSerial",null)),undCons(subcons(tph("_a"),type("com.sun.org.apache.xml.internal.security.keys.content.X509Data",null)), null)),orCons(undCons(subcons(tph("_b"),type("javax.swing.tree.MutableTreeNode",null)),undCons(subcons(tph("_a"),type("javax.swing.tree.DefaultMutableTreeNode",null)), null)),orCons(undCons(subcons(tph("_b"),type("sun.awt.image.ImageFetchable",null)),undCons(subcons(tph("_a"),type("sun.awt.image.ImageFetcher",null)), null)),orCons(undCons(subcons(tph("_b"),type("javax.management.Attribute",null)),undCons(subcons(tph("_a"),type("javax.management.AttributeList",null)), null)),orCons(undCons(subcons(tph("_b"),type("double",null)),undCons(subcons(tph("_a"),type("java.awt.image.renderable.ParameterBlock",null)), null)),orCons(undCons(subcons(tph("_a"),type("java.util.concurrent.CopyOnWriteArrayList$COWSubListIterator",null)),undCons(subcons(tph("_b"),tph("_E")), null)),orCons(undCons(subcons(tph("_b"),type("com.sun.org.apache.xml.internal.security.keys.content.x509.XMLX509CRL",null)),undCons(subcons(tph("_a"),type(Line truncated
+%orCons(undCons(subcons(tph("_a"),type("javax.print.attribute.HashAttributeSet",null)),undCons(subcons(tph("_c"),type("javax.print.attribute.Attribute",null)), null)),orCons(undCons(subcons(tph("_c"),type("javax.swing.GroupLayout$ComponentInfo",null)),undCons(subcons(tph("_a"),type("javax.swing.GroupLayout$LinkInfo",null)), null)),orCons(undCons(subcons(tph("_a"),type("java.util.ArrayList$SubList$1",null)),undCons(subcons(tph("_c"),tph("_E")), null)),orCons(undCons(subcons(tph("_c"),type("com.sun.org.apache.xml.internal.security.keys.content.x509.XMLX509SKI",null)),undCons(subcons(tph("_a"),type("com.sun.org.apache.xml.internal.security.keys.content.X509Data",null)), null)),orCons(undCons(subcons(tph("_a"),type("java.util.concurrent.ConcurrentHashMap$EntrySetView",null)),undCons(subcons(tph("_c"),type("java.lang.Object",null)), null)),orCons(undCons(subcons(tph("_c"),tph("_E")),undCons(subcons(tph("_a"),type("java.util.Set",null)), null)),orCons(undCons(subcons(tph("_c"),tph("_E")),undCons(subcons(tph("_a"),type("java.util.ArrayList$ListItr",null)), null)),orCons(undCons(subcons(tph("_c"),type("java.awt.geom.Point2D",null)),undCons(subcons(tph("_a"),type("java.awt.geom.Rectangle2D",null)), null)),orCons(undCons(subcons(tph("_c"),type("javax.xml.datatype.Duration",null)),undCons(subcons(tph("_a"),type("com.sun.org.apache.xerces.internal.jaxp.datatype.XMLGregorianCalendarImpl",null)), null)),orCons(undCons(subcons(tph("_a"),type("java.awt.image.renderable.ParameterBlock",null)),undCons(subcons(tph("_c"),type("int",null)), null)),orCons(undCons(subcons(tph("_c"),type("java.security.Permission",null)),undCons(subcons(tph("_a"),type("java.util.PropertyPermissionCollection",null)), null)),orCons(undCons(subcons(tph("_c"),type("javax.swing.Action",null)),undCons(subcons(tph("_a"),type("javax.swing.JMenu",null)), null)),orCons(undCons(subcons(tph("_c"),type("com.sun.org.apache.xml.internal.security.keys.content.SPKIData",null)),undCons(subcons(tph("_a"),type("com.sun.org.apache.xml.internal.security.keys.KeyInfo",null)), null)),orCons(undCons(subcons(tph("_c"),tph("_E")),undCons(subcons(tph("_a"),type("java.util.concurrent.ConcurrentSkipListSet",null)), null)),orCons(undCons(subcons(tph("_a"),type("javax.print.attribute.AttributeSetUtilities$UnmodifiableAttributeSet",null)),undCons(subcons(tph("_c"),type("javax.print.attribute.Attribute",null)), null)),orCons(undCons(subcons(tph("_a"),type("sun.tools.jar.Main$1",null)),undCons(subcons(tph("_c"),type("java.util.zip.ZipEntry",null)), null)),orCons(undCons(subcons(tph("_c"),type("java.security.Permission",null)),undCons(subcons(tph("_a"),type("javax.management.MBeanServerPermissionCollection",null)), null)),orCons(undCons(subcons(tph("_c"),type("java.security.Permission",null)),undCons(subcons(tph("_a"),type("java.security.UnresolvedPermissionCollection",null)), null)),orCons(undCons(subcons(tph("_c"),tph("_V")),undCons(subcons(tph("_a"),type("java.util.concurrent.ConcurrentHashMap$ValuesView",null)), null)), null))))))))))))))))))).
+
+%orCons(undCons(subcons(tph("_b"),type("java.security.Permission",null)),undCons(subcons(tph("_a"),type("java.util.PropertyPermissionCollection",null)), null)),orCons(undCons(subcons(tph("_a"),type("sun.java2d.marlin.stats.Histogram",null)),undCons(subcons(tph("_b"),type("int",null)), null)),orCons(undCons(subcons(tph("_a"),type("com.sun.jndi.ldap.LdapAttribute",null)),undCons(subcons(tph("_b"),type("java.lang.Object",null)), null)),orCons(undCons(subcons(tph("_b"),type("java.math.BigInteger",null)),undCons(subcons(tph("_a"),type("java.math.BigInteger",null)), null)),orCons(undCons(subcons(tph("_a"),type("com.sun.org.apache.xerces.internal.impl.xs.XSModelImpl$XSNamespaceItemListIterator",null)),undCons(subcons(tph("_b"),type("java.lang.Object",null)), null)),orCons(undCons(subcons(tph("_b"),type("com.sun.org.apache.xml.internal.security.keys.storage.StorageResolverSpi",null)),undCons(subcons(tph("_a"),type("com.sun.org.apache.xml.internal.security.keys.storage.StorageResolver",null)), null)),orCons(undCons(subcons(tph("_b"),tph("_E")),undCons(subcons(tph("_a"),type("java.util.AbstractList",null)), null)),orCons(undCons(subcons(tph("_b"),tph("_E")),undCons(subcons(tph("_a"),type("java.util.HashSet",null)), null)),orCons(undCons(subcons(tph("_b"),type("sun.security.util.math.IntegerModuloP",null)),undCons(subcons(tph("_a"),type("sun.security.util.math.intpoly.IntegerPolynomial$Element",null)), null)),orCons(undCons(subcons(tph("_b"),type("java.awt.geom.Point2D",null)),undCons(subcons(tph("_a"),type("java.awt.geom.Rectangle2D",null)), null)),orCons(undCons(subcons(tph("_b"),tph("_E")),undCons(subcons(tph("_a"),type("java.util.AbstractQueue",null)), null)),orCons(undCons(subcons(tph("_b"),type("double",null)),undCons(subcons(tph("_a"),type("java.util.concurrent.atomic.DoubleAdder",null)), null)),orCons(undCons(subcons(tph("_b"),tph("_E")),undCons(subcons(tph("_a"),type("java.util.Collections$AsLIFOQueue",null)), null)),orCons(undCons(subcons(tph("_b"),type("com.sun.org.apache.xml.internal.security.keys.content.keyvalues.DSAKeyValue",null)),undCons(subcons(tph("_a"),type("com.sun.org.apache.xml.internal.security.keys.KeyInfo",null)), null)),orCons(undCons(subcons(tph("_b"),tph("_E")),undCons(subcons(tph("_a"),type("java.util.Collections$EmptyListIterator",null)), null)),orCons(undCons(subcons(tph("_b"),tph("_E")),undCons(subcons(tph("_a"),type("java.util.AbstractList$ListItr",null)), null)),orCons(undCons(subcons(tph("_b"),type("java.math.BigDecimal",null)),undCons(subcons(tph("_a"),type("java.math.BigDecimal",null)), null)),orCons(undCons(subcons(tph("_b"),tph("_E")),undCons(subcons(tph("_a"),type("java.util.Collections$CheckedList$1",null)), null)),orCons(undCons(subcons(tph("_a"),type("sun.security.provider.PolicyParser",null)),undCons(subcons(tph("_b"),type("sun.security.provider.PolicyParser$GrantEntry",null)), null)),orCons(undCons(subcons(tph("_a"),type("sun.swing.AccumulativeRunnable",null)),undCons(subcons(tph("_b"),tph("_T_array")), null)),orCons(undCons(subcons(tph("_a"),type("com.sun.jmx.remote.internal.ArrayQueue",null)),undCons(subcons(tph("_b"),tph("_T")), null)),orCons(undCons(subcons(tph("_b"),type("javax.management.relation.Role",null)),undCons(subcons(tph("_a"),type("javax.management.relation.RoleList",null)), null)),orCons(undCons(subcons(tph("_b"),type("com.sun.org.apache.xml.internal.security.keys.content.x509.XMLX509SKI",null)),undCons(subcons(tph("_a"),type("com.sun.org.apache.xml.internal.security.keys.content.X509Data",null)), null)),orCons(undCons(subcons(tph("_b"),type("javax.xml.datatype.Duration",null)),undCons(subcons(tph("_a"),type("javax.xml.datatype.XMLGregorianCalendar",null)), null)),orCons(undCons(subcons(tph("_a"),type("java.util.concurrent.ConcurrentHashMap$EntrySetView",null)),undCons(subcons(tph("_b"),type("java.lang.Object",null)), null)),orCons(undCons(subcons(tph("_b"),type("com.sun.org.apache.xml.internal.security.keys.content.x509.XMLX509IssuerSerial",null)),undCons(subcons(tph("_a"),type("com.sun.org.apache.xml.internal.security.keys.content.X509Data",null)), null)),orCons(undCons(subcons(tph("_b"),type("javax.swing.tree.MutableTreeNode",null)),undCons(subcons(tph("_a"),type("javax.swing.tree.DefaultMutableTreeNode",null)), null)),orCons(undCons(subcons(tph("_b"),type("sun.awt.image.ImageFetchable",null)),undCons(subcons(tph("_a"),type("sun.awt.image.ImageFetcher",null)), null)),orCons(undCons(subcons(tph("_b"),type("javax.management.Attribute",null)),undCons(subcons(tph("_a"),type("javax.management.AttributeList",null)), null)),orCons(undCons(subcons(tph("_b"),type("double",null)),undCons(subcons(tph("_a"),type("java.awt.image.renderable.ParameterBlock",null)), null)),orCons(undCons(subcons(tph("_a"),type("java.util.concurrent.CopyOnWriteArrayList$COWSubListIterator",null)),undCons(subcons(tph("_b"),tph("_E")), null)),orCons(undCons(subcons(tph("_b"),type("com.sun.org.apache.xml.internal.security.keys.content.x509.XMLX509CRL",null)),undCons(subcons(tph("_a"),type(Line truncated
+%orCons(undCons(subcons(tph("_a"),type("javax.print.attribute.HashAttributeSet",null)),undCons(subcons(tph("_c"),type("javax.print.attribute.Attribute",null)), null)),orCons(undCons(subcons(tph("_c"),type("javax.swing.GroupLayout$ComponentInfo",null)),undCons(subcons(tph("_a"),type("javax.swing.GroupLayout$LinkInfo",null)), null)),orCons(undCons(subcons(tph("_a"),type("java.util.ArrayList$SubList$1",null)),undCons(subcons(tph("_c"),tph("_E")), null)),orCons(undCons(subcons(tph("_c"),type("com.sun.org.apache.xml.internal.security.keys.content.x509.XMLX509SKI",null)),undCons(subcons(tph("_a"),type("com.sun.org.apache.xml.internal.security.keys.content.X509Data",null)), null)),orCons(undCons(subcons(tph("_a"),type("java.util.concurrent.ConcurrentHashMap$EntrySetView",null)),undCons(subcons(tph("_c"),type("java.lang.Object",null)), null)),orCons(undCons(subcons(tph("_c"),tph("_E")),undCons(subcons(tph("_a"),type("java.util.Set",null)), null)),orCons(undCons(subcons(tph("_c"),tph("_E")),undCons(subcons(tph("_a"),type("java.util.ArrayList$ListItr",null)), null)),orCons(undCons(subcons(tph("_c"),type("java.awt.geom.Point2D",null)),undCons(subcons(tph("_a"),type("java.awt.geom.Rectangle2D",null)), null)),orCons(undCons(subcons(tph("_c"),type("javax.xml.datatype.Duration",null)),undCons(subcons(tph("_a"),type("com.sun.org.apache.xerces.internal.jaxp.datatype.XMLGregorianCalendarImpl",null)), null)),orCons(undCons(subcons(tph("_a"),type("java.awt.image.renderable.ParameterBlock",null)),undCons(subcons(tph("_c"),type("int",null)), null)),orCons(undCons(subcons(tph("_c"),type("java.security.Permission",null)),undCons(subcons(tph("_a"),type("java.util.PropertyPermissionCollection",null)), null)),orCons(undCons(subcons(tph("_c"),type("javax.swing.Action",null)),undCons(subcons(tph("_a"),type("javax.swing.JMenu",null)), null)),orCons(undCons(subcons(tph("_c"),type("com.sun.org.apache.xml.internal.security.keys.content.SPKIData",null)),undCons(subcons(tph("_a"),type("com.sun.org.apache.xml.internal.security.keys.KeyInfo",null)), null)),orCons(undCons(subcons(tph("_c"),tph("_E")),undCons(subcons(tph("_a"),type("java.util.concurrent.ConcurrentSkipListSet",null)), null)),orCons(undCons(subcons(tph("_a"),type("javax.print.attribute.AttributeSetUtilities$UnmodifiableAttributeSet",null)),undCons(subcons(tph("_c"),type("javax.print.attribute.Attribute",null)), null)),orCons(undCons(subcons(tph("_a"),type("sun.tools.jar.Main$1",null)),undCons(subcons(tph("_c"),type("java.util.zip.ZipEntry",null)), null)),orCons(undCons(subcons(tph("_c"),type("java.security.Permission",null)),undCons(subcons(tph("_a"),type("javax.management.MBeanServerPermissionCollection",null)), null)),orCons(undCons(subcons(tph("_c"),type("java.security.Permission",null)),undCons(subcons(tph("_a"),type("java.security.UnresolvedPermissionCollection",null)), null)),orCons(undCons(subcons(tph("_c"),tph("_V")),undCons(subcons(tph("_a"),type("java.util.concurrent.ConcurrentHashMap$ValuesView",null)), null)), null))))))))))))))))))).
+
+orCons(undCons(subcons(tph("_b"),type("java.security.Permission",null)),undCons(subcons(tph("_a"),type("java.util.PropertyPermissionCollection",null)), null)),orCons(undCons(subcons(tph("_a"),type("sun.java2d.marlin.stats.Histogram",null)),undCons(subcons(tph("_b"),type("int",null)), null)),orCons(undCons(subcons(tph("_a"),type("com.sun.jndi.ldap.LdapAttribute",null)),undCons(subcons(tph("_b"),type("java.lang.Object",null)), null)),orCons(undCons(subcons(tph("_b"),type("java.math.BigInteger",null)),undCons(subcons(tph("_a"),type("java.math.BigInteger",null)), null)),orCons(undCons(subcons(tph("_a"),type("com.sun.org.apache.xerces.internal.impl.xs.XSModelImpl$XSNamespaceItemListIterator",null)),undCons(subcons(tph("_b"),type("java.lang.Object",null)), null)),orCons(undCons(subcons(tph("_b"),type("com.sun.org.apache.xml.internal.security.keys.storage.StorageResolverSpi",null)),undCons(subcons(tph("_a"),type("com.sun.org.apache.xml.internal.security.keys.storage.StorageResolver",null)), null)),orCons(undCons(subcons(tph("_b"),tph("_E")),undCons(subcons(tph("_a"),type("java.util.AbstractList",null)), null)),orCons(undCons(subcons(tph("_b"),tph("_E")),undCons(subcons(tph("_a"),type("java.util.HashSet",null)), null)),orCons(undCons(subcons(tph("_b"),type("sun.security.util.math.IntegerModuloP",null)),undCons(subcons(tph("_a"),type("sun.security.util.math.intpoly.IntegerPolynomial$Element",null)), null)),orCons(undCons(subcons(tph("_b"),type("java.awt.geom.Point2D",null)),undCons(subcons(tph("_a"),type("java.awt.geom.Rectangle2D",null)), null)),orCons(undCons(subcons(tph("_b"),tph("_E")),undCons(subcons(tph("_a"),type("java.util.AbstractQueue",null)), null)),orCons(undCons(subcons(tph("_b"),type("double",null)),undCons(subcons(tph("_a"),type("java.util.concurrent.atomic.DoubleAdder",null)), null)),orCons(undCons(subcons(tph("_b"),tph("_E")),undCons(subcons(tph("_a"),type("java.util.Collections$AsLIFOQueue",null)), null)),orCons(undCons(subcons(tph("_b"),type("com.sun.org.apache.xml.internal.security.keys.content.keyvalues.DSAKeyValue",null)),undCons(subcons(tph("_a"),type("com.sun.org.apache.xml.internal.security.keys.KeyInfo",null)), null)),orCons(undCons(subcons(tph("_b"),tph("_E")),undCons(subcons(tph("_a"),type("java.util.Collections$EmptyListIterator",null)), null)),orCons(undCons(subcons(tph("_b"),tph("_E")),undCons(subcons(tph("_a"),type("java.util.AbstractList$ListItr",null)), null)),orCons(undCons(subcons(tph("_b"),type("java.math.BigDecimal",null)),undCons(subcons(tph("_a"),type("java.math.BigDecimal",null)), null)),orCons(undCons(subcons(tph("_b"),tph("_E")),undCons(subcons(tph("_a"),type("java.util.Collections$CheckedList$1",null)), null)),orCons(undCons(subcons(tph("_a"),type("sun.security.provider.PolicyParser",null)),undCons(subcons(tph("_b"),type("sun.security.provider.PolicyParser$GrantEntry",null)), null)),orCons(undCons(subcons(tph("_a"),type("sun.swing.AccumulativeRunnable",null)),undCons(subcons(tph("_b"),tph("_T_array")), null)),orCons(undCons(subcons(tph("_a"),type("com.sun.jmx.remote.internal.ArrayQueue",null)),undCons(subcons(tph("_b"),tph("_T")), null)),orCons(undCons(subcons(tph("_b"),type("javax.management.relation.Role",null)),undCons(subcons(tph("_a"),type("javax.management.relation.RoleList",null)), null)),orCons(undCons(subcons(tph("_b"),type("java.lang.String",null)),undCons(subcons(tph("_a"),type("javax.naming.Name",null)), null)),orCons(undCons(subcons(tph("_a"),type("javax.xml.datatype.Duration",null)),undCons(subcons(tph("_b"),type("javax.xml.datatype.Duration",null)), null)),orCons(undCons(subcons(tph("_b"),tph("_E")),undCons(subcons(tph("_a"),type("java.util.concurrent.ConcurrentSkipListSet",null)), null)),orCons(undCons(subcons(tph("_b"),type("javax.accessibility.AccessibleRelation",null)),undCons(subcons(tph("_a"),type("javax.accessibility.AccessibleRelationSet",null)), null)),orCons(undCons(subcons(tph("_b"),type("java.awt.RenderingHints",null)),undCons(subcons(tph("_a"),type("java.awt.RenderingHints",null)), null)),orCons(undCons(subcons(tph("_b"),type("java.lang.Object",null)),undCons(subcons(tph("_a"),type("java.util.JumboEnumSet",null)), null)),orCons(undCons(subcons(tph("_b"),type("javax.xml.datatype.Duration",null)),undCons(subcons(tph("_a"),type("com.sun.org.apache.xerces.internal.jaxp.datatype.DurationImpl",null)), null)),orCons(undCons(subcons(tph("_a"),type("javax.print.attribute.AttributeSetUtilities$UnmodifiableAttributeSet",null)),undCons(subcons(tph("_b"),type("javax.print.attribute.Attribute",null)), null)),orCons(undCons(subcons(tph("_a"),type("java.awt.geom.Rectangle2D",null)),undCons(subcons(tph("_b"),type("java.awt.geom.Rectangle2D",null)), null)),orCons(undCons(subcons(tph("_b"),type("java.awt.TrayIcon",null)),undCons(subcons(tph("_a"),type("java.awt.SystemTray",null)), null)),orCons(undCons(subcons(tph("_b"),type("java.awt.Component",null)),undCons(subcons(tph("_a"),type("sun.awt.X11.InfoWindow",null)), null)),orCons(undCons(subcons(tph("_a"),type("jaLine truncated
+orCons(undCons(subcons(tph("_a"),type("javax.print.attribute.HashAttributeSet",null)),undCons(subcons(tph("_c"),type("javax.print.attribute.Attribute",null)), null)),orCons(undCons(subcons(tph("_c"),type("javax.swing.GroupLayout$ComponentInfo",null)),undCons(subcons(tph("_a"),type("javax.swing.GroupLayout$LinkInfo",null)), null)),orCons(undCons(subcons(tph("_a"),type("java.util.ArrayList$SubList$1",null)),undCons(subcons(tph("_c"),tph("_E")), null)),orCons(undCons(subcons(tph("_c"),type("com.sun.org.apache.xml.internal.security.keys.content.x509.XMLX509SKI",null)),undCons(subcons(tph("_a"),type("com.sun.org.apache.xml.internal.security.keys.content.X509Data",null)), null)),orCons(undCons(subcons(tph("_a"),type("java.util.concurrent.ConcurrentHashMap$EntrySetView",null)),undCons(subcons(tph("_c"),type("java.lang.Object",null)), null)),orCons(undCons(subcons(tph("_c"),tph("_E")),undCons(subcons(tph("_a"),type("java.util.Set",null)), null)),orCons(undCons(subcons(tph("_c"),tph("_E")),undCons(subcons(tph("_a"),type("java.util.ArrayList$ListItr",null)), null)),orCons(undCons(subcons(tph("_c"),type("java.awt.geom.Point2D",null)),undCons(subcons(tph("_a"),type("java.awt.geom.Rectangle2D",null)), null)),orCons(undCons(subcons(tph("_c"),type("javax.xml.datatype.Duration",null)),undCons(subcons(tph("_a"),type("com.sun.org.apache.xerces.internal.jaxp.datatype.XMLGregorianCalendarImpl",null)), null)),orCons(undCons(subcons(tph("_a"),type("java.awt.image.renderable.ParameterBlock",null)),undCons(subcons(tph("_c"),type("int",null)), null)),orCons(undCons(subcons(tph("_c"),type("java.security.Permission",null)),undCons(subcons(tph("_a"),type("java.util.PropertyPermissionCollection",null)), null)),orCons(undCons(subcons(tph("_c"),type("javax.swing.Action",null)),undCons(subcons(tph("_a"),type("javax.swing.JMenu",null)), null)),orCons(undCons(subcons(tph("_c"),type("com.sun.org.apache.xml.internal.security.keys.content.SPKIData",null)),undCons(subcons(tph("_a"),type("com.sun.org.apache.xml.internal.security.keys.KeyInfo",null)), null)),orCons(undCons(subcons(tph("_c"),tph("_E")),undCons(subcons(tph("_a"),type("java.util.concurrent.ConcurrentSkipListSet",null)), null)),orCons(undCons(subcons(tph("_a"),type("javax.print.attribute.AttributeSetUtilities$UnmodifiableAttributeSet",null)),undCons(subcons(tph("_c"),type("javax.print.attribute.Attribute",null)), null)),orCons(undCons(subcons(tph("_a"),type("sun.tools.jar.Main$1",null)),undCons(subcons(tph("_c"),type("java.util.zip.ZipEntry",null)), null)),orCons(undCons(subcons(tph("_c"),type("java.security.Permission",null)),undCons(subcons(tph("_a"),type("javax.management.MBeanServerPermissionCollection",null)), null)),orCons(undCons(subcons(tph("_c"),type("java.security.Permission",null)),undCons(subcons(tph("_a"),type("java.security.UnresolvedPermissionCollection",null)), null)),orCons(undCons(subcons(tph("_c"),tph("_V")),undCons(subcons(tph("_a"),type("java.util.concurrent.ConcurrentHashMap$ValuesView",null)), null)),orCons(undCons(subcons(tph("_a"),type("sun.java2d.marlin.stats.StatLong",null)),undCons(subcons(tph("_c"),type("int",null)), null)),orCons(undCons(subcons(tph("_c"),tph("_E")),undCons(subcons(tph("_a"),type("java.util.Collections$CheckedList$1",null)), null)),orCons(undCons(subcons(tph("_c"),type("java.lang.String",null)),undCons(subcons(tph("_a"),type("javax.naming.Name",null)), null)),orCons(undCons(subcons(tph("_c"),type("com.sun.org.apache.xml.internal.security.keys.storage.StorageResolverSpi",null)),undCons(subcons(tph("_a"),type("com.sun.org.apache.xml.internal.security.keys.storage.StorageResolver",null)), null)),orCons(undCons(subcons(tph("_c"),type("javax.print.attribute.Attribute",null)),undCons(subcons(tph("_a"),type("javax.print.attribute.AttributeSet",null)), null)),orCons(undCons(subcons(tph("_a"),type("javax.management.relation.RoleUnresolvedList",null)),undCons(subcons(tph("_c"),type("javax.management.relation.RoleUnresolved",null)), null)),orCons(undCons(subcons(tph("_a"),type("javax.swing.JMenu",null)),undCons(subcons(tph("_c"),type("java.awt.Component",null)), null)),orCons(undCons(subcons(tph("_c"),type("javax.print.attribute.Attribute",null)),undCons(subcons(tph("_a"),type("javax.print.attribute.PrintJobAttributeSet",null)), null)),orCons(undCons(subcons(tph("_c"),tph("_E")),undCons(subcons(tph("_a"),type("java.util.ArrayList",null)), null)),orCons(undCons(subcons(tph("_c"),type("com.sun.org.apache.xml.internal.security.keys.content.x509.XMLX509SubjectName",null)),undCons(subcons(tph("_a"),type("com.sun.org.apache.xml.internal.security.keys.content.X509Data",null)), null)),orCons(undCons(subcons(tph("_a"),type("javax.print.attribute.standard.JobStateReasons",null)),undCons(subcons(tph("_c"),type("java.lang.Object",null)), null)),orCons(undCons(subcons(tph("_c"),type("char",null)),undCons(subcons(tph("_a"),type("java.awt.image.renderable.ParameterBlock",null)), null)),orCons(undCons(subcons(tph("_a"),type("java.awt.Rectangle",null)),undCons(subLine truncated
+orCons(undCons(subcons(tph("_d"),type("com.sun.org.apache.xml.internal.security.keys.content.x509.XMLX509SubjectName",null)),undCons(subcons(tph("_a"),type("com.sun.org.apache.xml.internal.security.keys.content.X509Data",null)), null)),orCons(undCons(subcons(tph("_d"),tph("_E")),undCons(subcons(tph("_a"),type("java.util.Collections$SetFromMap",null)), null)),orCons(undCons(subcons(tph("_a"),type("javax.swing.JPopupMenu",null)),undCons(subcons(tph("_d"),type("javax.swing.JMenuItem",null)), null)),orCons(undCons(subcons(tph("_a"),type("java.util.stream.IntStream$Builder",null)),undCons(subcons(tph("_d"),type("int",null)), null)),orCons(undCons(subcons(tph("_a"),type("java.awt.RenderingHints",null)),undCons(subcons(tph("_d"),type("java.awt.RenderingHints",null)), null)),orCons(undCons(subcons(tph("_d"),type("long",null)),undCons(subcons(tph("_a"),type("java.awt.image.renderable.ParameterBlock",null)), null)),orCons(undCons(subcons(tph("_a"),type("javax.accessibility.AccessibleStateSet",null)),undCons(subcons(tph("_d"),type("javax.accessibility.AccessibleState",null)), null)),orCons(undCons(subcons(tph("_d"),tph("_E")),undCons(subcons(tph("_a"),type("java.util.Collections$CheckedList$1",null)), null)),orCons(undCons(subcons(tph("_a"),type("java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue",null)),undCons(subcons(tph("_d"),type("java.lang.Runnable",null)), null)),orCons(undCons(subcons(tph("_a"),type("java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue",null)),undCons(subcons(tph("_d"),type("java.lang.Object",null)), null)),orCons(undCons(subcons(tph("_d"),type("java.awt.geom.Point2D",null)),undCons(subcons(tph("_a"),type("java.awt.geom.Rectangle2D",null)), null)),orCons(undCons(subcons(tph("_a"),type("javax.swing.JMenu",null)),undCons(subcons(tph("_d"),type("java.lang.String",null)), null)),orCons(undCons(subcons(tph("_a"),type("javax.naming.CompositeName",null)),undCons(subcons(tph("_d"),type("java.lang.String",null)), null)),orCons(undCons(subcons(tph("_d"),tph("_E")),undCons(subcons(tph("_a"),type("java.util.AbstractQueue",null)), null)),orCons(undCons(subcons(tph("_a"),type("com.sun.org.apache.xerces.internal.dom.DOMStringListImpl",null)),undCons(subcons(tph("_d"),type("java.lang.String",null)), null)),orCons(undCons(subcons(tph("_a"),type("java.awt.List",null)),undCons(subcons(tph("_d"),type("java.lang.String",null)), null)),orCons(undCons(subcons(tph("_d"),tph("_E")),undCons(subcons(tph("_a"),type("java.util.Collection",null)), null)),orCons(undCons(subcons(tph("_a"),type("com.sun.org.apache.xalan.internal.xsltc.util.IntegerArray",null)),undCons(subcons(tph("_d"),type("int",null)), null)),orCons(undCons(subcons(tph("_d"),tph("_E")),undCons(subcons(tph("_a"),type("java.util.concurrent.CopyOnWriteArrayList$COWIterator",null)), null)),orCons(undCons(subcons(tph("_a"),type("java.util.RegularEnumSet",null)),undCons(subcons(tph("_d"),type("java.lang.Object",null)), null)),orCons(undCons(subcons(tph("_a"),type("com.sun.org.apache.xerces.internal.impl.xs.XSModelImpl$XSNamespaceItemListIterator",null)),undCons(subcons(tph("_d"),type("com.sun.org.apache.xerces.internal.xs.XSNamespaceItem",null)), null)),orCons(undCons(subcons(tph("_d"),type("char",null)),undCons(subcons(tph("_a"),type("java.awt.image.renderable.ParameterBlock",null)), null)),orCons(undCons(subcons(tph("_a"),type("javax.naming.CompoundName",null)),undCons(subcons(tph("_d"),type("java.lang.String",null)), null)),orCons(undCons(subcons(tph("_d"),type("java.security.Permission",null)),undCons(subcons(tph("_a"),type("java.util.PropertyPermissionCollection",null)), null)),orCons(undCons(subcons(tph("_a"),type("com.sun.media.sound.SimpleInstrument",null)),undCons(subcons(tph("_d"),type("[Lcom.sun.media.sound.ModelPerformer;",null)), null)),orCons(undCons(subcons(tph("_d"),type("java.awt.Component",null)),undCons(subcons(tph("_a"),type("java.awt.Container",null)), null)),orCons(undCons(subcons(tph("_a"),type("sun.awt.image.ImageFetcher",null)),undCons(subcons(tph("_d"),type("sun.awt.image.ImageFetchable",null)), null)),orCons(undCons(subcons(tph("_d"),tph("_E")),undCons(subcons(tph("_a"),type("java.util.LinkedList",null)), null)),orCons(undCons(subcons(tph("_d"),type("javax.print.attribute.Attribute",null)),undCons(subcons(tph("_a"),type("javax.print.attribute.AttributeSetUtilities$UnmodifiableAttributeSet",null)), null)),orCons(undCons(subcons(tph("_d"),type("java.lang.CharSequence",null)),undCons(subcons(tph("_a"),type("java.util.StringJoiner",null)), null)),orCons(undCons(subcons(tph("_d"),type("java.security.Permission",null)),undCons(subcons(tph("_a"),type("java.security.UnresolvedPermissionCollection",null)), null)),orCons(undCons(subcons(tph("_a"),type("com.sun.org.apache.xerces.internal.impl.xs.util.XSObjectListImpl$XSObjectListIterator",null)),undCons(subcons(tph("_d"),type("java.lang.Object",null)), null)),orCons(undCons(subcons(tph("_a"),type("jdk.internal.org.objectweb.asm.commons.InstructionAdapter",null)),undConLine truncated
+
+:- sigma(tph("_b"), A), sigma(tph("_c"), A),sigma(tph("_d"), A).
+
+subtype(type("java.lang.Boolean",null),type("java.lang.Object",null)):-subtype(type("java.lang.Boolean",null)).subtype(type("java.lang.String",null),type("java.lang.Object",null)):-subtype(type("java.lang.String",null)).subtype(type("java.lang.Integer",null),type("java.lang.Object",null)):-subtype(type("java.lang.Integer",null)).subtype(type("OrConsTest",null),type("java.lang.Object",null)):-subtype(type("OrConsTest",null)).subtype(type("MyPair",params(XX,XY)),type("Pair",params(XX,XX))):-subtype(type("MyPair",params(XX,XY))).subtype(type("Pair",params(XX,XY)),type("Object",null)):-subtype(type("Pair",params(XX,XY))).subtype(type("List",params(XX)),type("Object",null)):-subtype(type("List",params(XX))).subtype(type("Integer",null),type("Object",null)):-subtype(type("Integer",null)).subtype(type("String",null),type("Object",null)):-subtype(type("String",null)).
+
+subtype(type("C1",null),type("java.lang.Object",null)):-subtype(type("C1",null)).
+subtype(type("C2",null),type("java.lang.Object",null)):-subtype(type("C2",null)).
+subtype(type("java.lang.Boolean",null),type("java.lang.Object",null)):-subtype(type("java.lang.Boolean",null)).subtype(type("java.lang.String",null),type("java.lang.Object",null)):-subtype(type("java.lang.String",null)).subtype(type("java.lang.Integer",null),type("java.lang.Object",null)):-subtype(type("java.lang.Integer",null)).subtype(type("OrConsTest",null),type("java.lang.Object",null)):-subtype(type("OrConsTest",null)).subtype(type("MyPair",params(XX,XY)),type("Pair",params(XX,XX))):-subtype(type("MyPair",params(XX,XY))).subtype(type("Pair",params(XX,XY)),type("Object",null)):-subtype(type("Pair",params(XX,XY))).subtype(type("List",params(XX)),type("Object",null)):-subtype(type("List",params(XX))).subtype(type("Integer",null),type("Object",null)):-subtype(type("Integer",null)).subtype(type("String",null),type("Object",null)):-subtype(type("String",null)).
+
+%TODO: there is propably something wrong with the or-constraint generation
+
+%%%%%
+
+subtype(type("MyPair", params(X, Y)), type("Pair", params(Y, X))) :- subtype(type("MyPair", params(X, Y))).
+subtype(type("ArrayList", params(X)), type("List", params(X))) :- subtype(type("ArrayList", params(X))).
+subtype(type("List", params(X)), type("Object", null)) :- subtype(type("List", params(X))).
+subtype(type("Integer", null), type("Object", null)) :- subtype(type("Integer", null)).
+subtype(type("Matrix", null), type("Vector", params(type("Vector", params(type("Integer", null)))))) :- subtype(type("Matrix", null)).
+subtype(type("Vector", params(X)), type("Object", null)) :- subtype(type("Vector", params(X))).
+
+
+% Or-Constraints
+undCons(A,B) :- orCons(undCons(A,B), null).
+undCons(A,B); orCons(C,D) :- orCons(undCons(A,B), orCons(C,D)).
+
+
+% undCons
+subcons(A,B) :- undCons(subcons(A,B), _).
+undCons(C,D) :- undCons(_, undCons(C,D)).
+equalcons(A,B) :- undCons(equalcons(A,B), _).
+undCons(B,C) :- undCons(A, undCons(B, C)).
+
+% Subtyping
+subtype(A, A) :- subtype(A). % reflexive
+subtype(A, A) :- subtype(A, B). % reflexive
+subtype(B) :- subtype(A, B). % transitive
+subtype(A, C) :- subtype(A, B), subtype(B, C). % transitive
+% named Subtyping
+namedSubtype(A,B) :- subtype(type(A, AP), type(B, BP)).
+% is reflexive and transitive because subtype it stems from subtype
+
+% generate the subtype relations for every constraint where one is needed: (this could be optimized)
+subtype(type(A, P)) :- subcons(_, type(A, P)).
+subtype(type(A, P)) :- subcons(type(A, P), _). 
+
+% subst:
+subst(tph(A), type(N,P)) :- equalcons(tph(A), type(N, P)).
+
+% subst-L:
+subcons(B,C) :- subst(A, B), subcons(A, C).
+%subst-R:
+subcons(C,B) :- subst(A, B), subcons(C, A).
+%subst-Equal:
+equalcons(B,C) :- subst(A, B), equalcons(A, C).
+
+%swap:
+equalcons(A,B) :- equalcons(B,A).
+
+%unfold:
+equalcons(T, T) :- equalcons(tph(_), type(_, params(T))).
+equalcons(T, T) :- equalcons(tph(_), type(_, params(T, _))).
+equalcons(T, T) :- equalcons(tph(_), type(_, params(_, T))).
+equalcons(T, T) :- equalcons(tph(_), type(_, params(T, _, _))).
+equalcons(T, T) :- equalcons(tph(_), type(_, params(_, T, _))).
+equalcons(T, T) :- equalcons(tph(_), type(_, params(_, _, T))).
+
+% Subst-Param:
+subcons(A, type(C, params(T2))) :- subcons(A, type(C, params(T))), subst(T, T2).
+subcons(A, type(C, params(T2, P2))) :- subcons(A, type(C, params(T, P2))), subst(T, T2).
+subcons(A, type(C, params(P1, T2))) :- subcons(A, type(C, params(P1, T))), subst(T, T2).
+subcons(A, type(C, params(T2, P2, P3))) :- subcons(A, type(C, params(T, P2, P3))), subst(T, T2).
+subcons(A, type(C, params(P1, T2, P3))) :- subcons(A, type(C, params(P1, T, P3))), subst(T, T2).
+subcons(A, type(C, params( P1, P2, T2))) :- subcons(A, type(C, params(P1, P2, T))), subst(T, T2).
+
+% match
+subcons(type(C, P1), type(D, P2)) :- subcons(tph(A), type(C, P1)), subcons(tph(A), type(D, P2)), namedSubtype(C, D).
+
+% adopt
+subcons(tph(A), type(C,P)) :- subcons(tph(A), tph(B)), subcons(tph(B), type(C,P)).
+
+% adapt
+equalcons(type(D,P3), type(D,P2)) :- subcons(type(C,P), type(D, P2)), subtype(type(C, P), type(D, P3)).
+
+% reduce
+equalcons(P1, PP1) :- equalcons(type(C, params(P1)), type(C, params(PP1))).
+equalcons(P1, PP1) :- equalcons(type(C, params(P1, P2)), type(C, params(PP1, PP2))).
+equalcons(P2, PP2) :- equalcons(type(C, params(P1, P2)), type(C, params(PP1, PP2))).
+equalcons(P1, PP1) :- equalcons(type(C, params(P1, P2, P3)), type(C, params(PP1, PP2, PP3))).
+equalcons(P2, PP2) :- equalcons(type(C, params(P1, P2, P3)), type(C, params(PP1, PP2, PP3))).
+equalcons(P3, PP3) :- equalcons(type(C, params(P1, P2, P3)), type(C, params(PP1, PP2, PP3))).
+
+% super 
+{ equalcons(tph(A), type(D, DP)):  subtype(type(C, CP), type(D, DP)) } == 1 :- subcons(type(C, CP), tph(A)).
+%equalcons(tph(A), type(C, CP)) :- subcons(type(C, CP), tph(A)), not subtype(type(C, CP),_).
+
+
+%Solution-Gen
+%subst(tph(A), typeVar(tph(A))) :- subcons(tph(A), type(C,P)), not sigma(tph(A), _).
+%sigma2(tph(A), typeVar(tph(A))) :- subcons(tph(A), type(C,P)), not sigma(tph(A), _).
+
+% here we check if there is a constraint a <. C, where there is no other Constraint. This is the solution-Gen rule
+%Solution-Subst:
+hasASubtype(tph(A), type(D,P2)) :- subcons(tph(A), type(C,P)), subcons(tph(A), type(D,P2)), namedSubtype(C, D), C != D.
+equalcons(tph(A), type(C,P)) :- subcons(tph(A), type(C,P)), not hasASubtype(tph(A), type(C,P)).
+
+%Solution:
+tphs( P ) :- equalcons(tph(A), type(C, P)).
+sigma(tph(A), type(C,P)) :- equalcons(tph(A), type(C, P)), not tphs(_, P).
+
+% Fail
+:- equalcons(tph(A), type(C, P)), tphs(tph(A), P). % fail for subst
+
+:- equalcons(type(C, CP), type(D, DP)), C != D. % fail for reduce
+:- subcons(type(C, CP), type(D, DP)),  not namedSubtype(C, D). % fail for adapt
+:- subcons(tph(A), type(D, DP)), subcons(tph(A), type(C, CP)), not namedSubtype(C, D), not namedSubtype(D, C). %Fail for match
+
+%% Helpers
+%tphs:
+tphs(tph(P), params(tph(P))) :- tphs( params(tph(P))).
+tphs(P) :- tphs( params(type(C, P))).
+tphs(tph(A), params(type(C, P))) :- tphs( params(type(C, P))), tphs(tph(A), P).
+
+tphs(tph(P), params(X, tph(P))) :- tphs( params(X, tph(P))).
+tphs(tph(P), params(tph(P), X)) :- tphs( params(tph(P), X)).
+tphs(P) :- tphs( params(X, type(C, P))).
+tphs(P) :- tphs( params(type(C, P), X)).
+tphs(tph(A), params(X, type(C, P))) :- tphs( params(X, type(C, P))), tphs(tph(A), P).
+tphs(tph(A), params(type(C, P), X)) :- tphs( params(type(C, P), X)), tphs(tph(A), P).
+
+
+tphs(tph(P), params(tph(P), X, Y)) :- tphs( params(tph(P), X, Y)).
+tphs(tph(P), params(X, tph(P), Y)) :- tphs( params(X, tph(P), Y)).
+tphs(tph(P), params(X,Y,tph(P))) :- tphs( params(X, Y, tph(P))).
+tphs(P) :- tphs( params(type(C, P), X, Y)).
+tphs(P) :- tphs( params(X, type(C, P),Y)).
+tphs(P) :- tphs( params(X,Y,type(C, P))).
+tphs(tph(A), params(type(C, P), X, Y)) :- tphs( params(type(C, P), X, Y)), tphs(tph(A), P).
+tphs(tph(A), params(X, type(C, P), Y)) :- tphs( params(X, type(C, P), Y)), tphs(tph(A), P).
+tphs(tph(A), params(X, Y, type(C, P))) :- tphs( params(X, Y, type(C, P))), tphs(tph(A), P).
+
+
+#show sigma/2.
+#show sigma2/2.

src/main/asp/unifyPaper.lp

@@ -0,0 +1,155 @@
+% TEST INPUT
+orCons(undCons(subcons(tph("_AG"),tph("_AD")),undCons(equalcons(tph("_O"),type("C1",null)),undCons(equalcons(type("java.lang.Object",null),type("java.lang.Object",null)),undCons(equalcons(tph("_W"),type("C2",null)),undCons(subcons(tph("_O"),tph("_N")),undCons(subcons(tph("_W"),tph("_V")), null)))))), null).
+orCons(undCons(subcons(tph("_N"),tph("_BC")),undCons(equalcons(tph("_AE"),type("C1",null)), null)),orCons(undCons(equalcons(tph("_AE"),type("C2",null)),undCons(subcons(tph("_V"),tph("_BC")), null)),orCons(undCons(equalcons(tph("_AE"),type("C2",null)),undCons(subcons(tph("_V"),tph("_BC")), null)),orCons(undCons(subcons(tph("_N"),tph("_BC")),undCons(equalcons(tph("_AE"),type("C1",null)), null)), null)))).
+orCons(undCons(subcons(tph("_N"),tph("_BA")),undCons(equalcons(tph("_BC"),type("C1",null)), null)),orCons(undCons(subcons(tph("_V"),tph("_BA")),undCons(equalcons(tph("_BC"),type("C2",null)), null)),orCons(undCons(subcons(tph("_V"),tph("_BA")),undCons(equalcons(tph("_BC"),type("C2",null)), null)),null))).
+orCons(undCons(equalcons(tph("_BA"),type("C1",null)),undCons(subcons(tph("_N"),tph("_AY")), null)),orCons(undCons(subcons(tph("_V"),tph("_AY")),undCons(equalcons(tph("_BA"),type("C2",null)), null)),orCons(undCons(equalcons(tph("_BA"),type("C1",null)),undCons(subcons(tph("_N"),tph("_AY")), null)),orCons(undCons(subcons(tph("_V"),tph("_AY")),undCons(equalcons(tph("_BA"),type("C2",null)), null)), null)))).
+orCons(undCons(equalcons(tph("_AY"),type("C2",null)),undCons(subcons(tph("_V"),tph("_AW")), null)),orCons(undCons(equalcons(tph("_AY"),type("C2",null)),undCons(subcons(tph("_V"),tph("_AW")), null)),orCons(undCons(equalcons(tph("_AY"),type("C1",null)),undCons(subcons(tph("_N"),tph("_AW")), null)),orCons(undCons(equalcons(tph("_AY"),type("C1",null)),undCons(subcons(tph("_N"),tph("_AW")), null)), null)))).
+orCons(undCons(equalcons(tph("_AW"),type("C2",null)),undCons(subcons(tph("_V"),tph("_AU")), null)),orCons(undCons(equalcons(tph("_AW"),type("C1",null)),undCons(subcons(tph("_N"),tph("_AU")), null)),orCons(undCons(equalcons(tph("_AW"),type("C2",null)),undCons(subcons(tph("_V"),tph("_AU")), null)),orCons(undCons(equalcons(tph("_AW"),type("C1",null)),undCons(subcons(tph("_N"),tph("_AU")), null)), null)))).
+orCons(undCons(subcons(tph("_N"),tph("_AS")),undCons(equalcons(tph("_AU"),type("C1",null)), null)),orCons(undCons(equalcons(tph("_AU"),type("C2",null)),undCons(subcons(tph("_V"),tph("_AS")), null)),orCons(undCons(subcons(tph("_N"),tph("_AS")),undCons(equalcons(tph("_AU"),type("C1",null)), null)),orCons(undCons(equalcons(tph("_AU"),type("C2",null)),undCons(subcons(tph("_V"),tph("_AS")), null)), null)))).
+orCons(undCons(subcons(tph("_N"),tph("_AQ")),undCons(equalcons(tph("_AS"),type("C1",null)), null)),orCons(undCons(subcons(tph("_N"),tph("_AQ")),undCons(equalcons(tph("_AS"),type("C1",null)), null)),orCons(undCons(subcons(tph("_V"),tph("_AQ")),undCons(equalcons(tph("_AS"),type("C2",null)), null)),orCons(undCons(subcons(tph("_V"),tph("_AQ")),undCons(equalcons(tph("_AS"),type("C2",null)), null)), null)))).
+orCons(undCons(subcons(tph("_V"),tph("_AO")),undCons(equalcons(tph("_AQ"),type("C2",null)), null)),orCons(undCons(subcons(tph("_V"),tph("_AO")),undCons(equalcons(tph("_AQ"),type("C2",null)), null)),orCons(undCons(equalcons(tph("_AQ"),type("C1",null)),undCons(subcons(tph("_N"),tph("_AO")), null)),orCons(undCons(equalcons(tph("_AQ"),type("C1",null)),undCons(subcons(tph("_N"),tph("_AO")), null)), null)))).
+orCons(undCons(subcons(tph("_V"),tph("_AM")),undCons(equalcons(tph("_AO"),type("C2",null)), null)),orCons(undCons(equalcons(tph("_AO"),type("C1",null)),undCons(subcons(tph("_N"),tph("_AM")), null)),orCons(undCons(subcons(tph("_V"),tph("_AM")),undCons(equalcons(tph("_AO"),type("C2",null)), null)),orCons(undCons(equalcons(tph("_AO"),type("C1",null)),undCons(subcons(tph("_N"),tph("_AM")), null)), null)))).
+orCons(undCons(equalcons(tph("_AM"),type("C1",null)),undCons(subcons(tph("_N"),tph("_AK")), null)),orCons(undCons(equalcons(tph("_AM"),type("C1",null)),undCons(subcons(tph("_N"),tph("_AK")), null)),orCons(undCons(subcons(tph("_V"),tph("_AK")),undCons(equalcons(tph("_AM"),type("C2",null)), null)),orCons(undCons(subcons(tph("_V"),tph("_AK")),undCons(equalcons(tph("_AM"),type("C2",null)), null)), null)))).
+orCons(undCons(subcons(tph("_V"),tph("_AI")),undCons(equalcons(tph("_AK"),type("C2",null)), null)),orCons(undCons(equalcons(tph("_AK"),type("C1",null)),undCons(subcons(tph("_N"),tph("_AI")), null)),orCons(undCons(subcons(tph("_V"),tph("_AI")),undCons(equalcons(tph("_AK"),type("C2",null)), null)),orCons(undCons(equalcons(tph("_AK"),type("C1",null)),undCons(subcons(tph("_N"),tph("_AI")), null)), null)))).
+orCons(undCons(equalcons(tph("_AI"),type("C2",null)),undCons(subcons(tph("_V"),tph("_AG")), null)),orCons(undCons(equalcons(tph("_AI"),type("C1",null)),undCons(subcons(tph("_N"),tph("_AG")), null)),orCons(undCons(equalcons(tph("_AI"),type("C1",null)),undCons(subcons(tph("_N"),tph("_AG")), null)),orCons(undCons(equalcons(tph("_AI"),type("C2",null)),undCons(subcons(tph("_V"),tph("_AG")), null)), null)))).
+
+subtype(type("java.lang.Boolean",null),type("java.lang.Object",null)):-subtype(type("java.lang.Boolean",null)).subtype(type("java.lang.String",null),type("java.lang.Object",null)):-subtype(type("java.lang.String",null)).subtype(type("java.lang.Integer",null),type("java.lang.Object",null)):-subtype(type("java.lang.Integer",null)).subtype(type("OrConsTest",null),type("java.lang.Object",null)):-subtype(type("OrConsTest",null)).subtype(type("MyPair",params(XX,XY)),type("Pair",params(XX,XX))):-subtype(type("MyPair",params(XX,XY))).subtype(type("Pair",params(XX,XY)),type("Object",null)):-subtype(type("Pair",params(XX,XY))).subtype(type("List",params(XX)),type("Object",null)):-subtype(type("List",params(XX))).subtype(type("Integer",null),type("Object",null)):-subtype(type("Integer",null)).subtype(type("String",null),type("Object",null)):-subtype(type("String",null)).
+
+subtype(type("C1",null),type("java.lang.Object",null)):-subtype(type("C1",null)).
+subtype(type("C2",null),type("java.lang.Object",null)):-subtype(type("C2",null)).
+subtype(type("java.lang.Boolean",null),type("java.lang.Object",null)):-subtype(type("java.lang.Boolean",null)).subtype(type("java.lang.String",null),type("java.lang.Object",null)):-subtype(type("java.lang.String",null)).subtype(type("java.lang.Integer",null),type("java.lang.Object",null)):-subtype(type("java.lang.Integer",null)).subtype(type("OrConsTest",null),type("java.lang.Object",null)):-subtype(type("OrConsTest",null)).subtype(type("MyPair",params(XX,XY)),type("Pair",params(XX,XX))):-subtype(type("MyPair",params(XX,XY))).subtype(type("Pair",params(XX,XY)),type("Object",null)):-subtype(type("Pair",params(XX,XY))).subtype(type("List",params(XX)),type("Object",null)):-subtype(type("List",params(XX))).subtype(type("Integer",null),type("Object",null)):-subtype(type("Integer",null)).subtype(type("String",null),type("Object",null)):-subtype(type("String",null)).
+
+%TODO: there is propably something wrong with the or-constraint generation
+
+%%%%%
+
+subtype(type("MyPair", params(X, Y)), type("Pair", params(Y, X))) :- subtype(type("MyPair", params(X, Y))).
+subtype(type("ArrayList", params(X)), type("List", params(X))) :- subtype(type("ArrayList", params(X))).
+subtype(type("List", params(X)), type("Object", null)) :- subtype(type("List", params(X))).
+subtype(type("Integer", null), type("Object", null)) :- subtype(type("Integer", null)).
+subtype(type("Matrix", null), type("Vector", params(type("Vector", params(type("Integer", null)))))) :- subtype(type("Matrix", null)).
+subtype(type("Vector", params(X)), type("Object", null)) :- subtype(type("Vector", params(X))).
+
+
+% Or-Constraints
+undCons(A,B) :- orCons(undCons(A,B), null).
+undCons(A,B); orCons(C,D) :- orCons(undCons(A,B), orCons(C,D)).
+
+
+% undCons
+subcons(A,B) :- undCons(subcons(A,B), _).
+undCons(C,D) :- undCons(_, undCons(C,D)).
+equalcons(A,B) :- undCons(equalcons(A,B), _).
+undCons(B,C) :- undCons(A, undCons(B, C)).
+
+% Subtyping
+subtype(A, A) :- subtype(A). % reflexive
+subtype(A, A) :- subtype(A, B). % reflexive
+subtype(B) :- subtype(A, B). % transitive
+subtype(A, C) :- subtype(A, B), subtype(B, C). % transitive
+% named Subtyping
+namedSubtype(A,B) :- subtype(type(A, AP), type(B, BP)).
+% is reflexive and transitive because subtype it stems from subtype
+
+% generate the subtype relations for every constraint where one is needed: (this could be optimized)
+subtype(type(A, P)) :- subcons(_, type(A, P)).
+subtype(type(A, P)) :- subcons(type(A, P), _). 
+
+% subst:
+subst(tph(A), type(N,P)) :- equalcons(tph(A), type(N, P)).
+
+% subst-L:
+subcons(B,C) :- subst(A, B), subcons(A, C).
+%subst-R:
+subcons(C,B) :- subst(A, B), subcons(C, A).
+%subst-Equal:
+equalcons(B,C) :- subst(A, B), equalcons(A, C).
+
+%swap:
+equalcons(A,B) :- equalcons(B,A).
+
+%unfold:
+equalcons(T, T) :- equalcons(tph(_), type(_, params(T))).
+equalcons(T, T) :- equalcons(tph(_), type(_, params(T, _))).
+equalcons(T, T) :- equalcons(tph(_), type(_, params(_, T))).
+equalcons(T, T) :- equalcons(tph(_), type(_, params(T, _, _))).
+equalcons(T, T) :- equalcons(tph(_), type(_, params(_, T, _))).
+equalcons(T, T) :- equalcons(tph(_), type(_, params(_, _, T))).
+
+% Subst-Param:
+subcons(A, type(C, params(T2))) :- subcons(A, type(C, params(T))), subst(T, T2).
+subcons(A, type(C, params(T2, P2))) :- subcons(A, type(C, params(T, P2))), subst(T, T2).
+subcons(A, type(C, params(P1, T2))) :- subcons(A, type(C, params(P1, T))), subst(T, T2).
+subcons(A, type(C, params(T2, P2, P3))) :- subcons(A, type(C, params(T, P2, P3))), subst(T, T2).
+subcons(A, type(C, params(P1, T2, P3))) :- subcons(A, type(C, params(P1, T, P3))), subst(T, T2).
+subcons(A, type(C, params( P1, P2, T2))) :- subcons(A, type(C, params(P1, P2, T))), subst(T, T2).
+
+% match
+subcons(type(C, P1), type(D, P2)) :- subcons(tph(A), type(C, P1)), subcons(tph(A), type(D, P2)), namedSubtype(C, D).
+
+% adopt
+subcons(tph(A), type(C,P)) :- subcons(tph(A), tph(B)), subcons(tph(B), type(C,P)).
+
+% adapt
+equalcons(type(D,P3), type(D,P2)) :- subcons(type(C,P), type(D, P2)), subtype(type(C, P), type(D, P3)).
+
+% reduce
+equalcons(P1, PP1) :- equalcons(type(C, params(P1)), type(C, params(PP1))).
+equalcons(P1, PP1) :- equalcons(type(C, params(P1, P2)), type(C, params(PP1, PP2))).
+equalcons(P2, PP2) :- equalcons(type(C, params(P1, P2)), type(C, params(PP1, PP2))).
+equalcons(P1, PP1) :- equalcons(type(C, params(P1, P2, P3)), type(C, params(PP1, PP2, PP3))).
+equalcons(P2, PP2) :- equalcons(type(C, params(P1, P2, P3)), type(C, params(PP1, PP2, PP3))).
+equalcons(P3, PP3) :- equalcons(type(C, params(P1, P2, P3)), type(C, params(PP1, PP2, PP3))).
+
+% super 
+{ equalcons(tph(A), type(D, DP)):  subtype(type(C, CP), type(D, DP)) } == 1 :- subcons(type(C, CP), tph(A)).
+%equalcons(tph(A), type(C, CP)) :- subcons(type(C, CP), tph(A)), not subtype(type(C, CP),_).
+
+
+%Solution-Gen
+%subst(tph(A), typeVar(tph(A))) :- subcons(tph(A), type(C,P)), not sigma(tph(A), _).
+%sigma2(tph(A), typeVar(tph(A))) :- subcons(tph(A), type(C,P)), not sigma(tph(A), _).
+
+% here we check if there is a constraint a <. C, where there is no other Constraint. This is the solution-Gen rule
+%Solution-Subst:
+hasASubtype(tph(A), type(D,P2)) :- subcons(tph(A), type(C,P)), subcons(tph(A), type(D,P2)), namedSubtype(C, D), C != D.
+equalcons(tph(A), type(C,P)) :- subcons(tph(A), type(C,P)), not hasASubtype(tph(A), type(C,P)).
+
+%Solution:
+tphs( P ) :- equalcons(tph(A), type(C, P)).
+sigma(tph(A), type(C,P)) :- equalcons(tph(A), type(C, P)), not tphs(_, P).
+
+% Fail
+:- equalcons(tph(A), type(C, P)), tphs(tph(A), P). % fail for subst
+
+:- equalcons(type(C, CP), type(D, DP)), C != D. % fail for reduce
+:- subcons(type(C, CP), type(D, DP)),  not namedSubtype(C, D). % fail for adapt
+:- subcons(tph(A), type(D, DP)), subcons(tph(A), type(C, CP)), not namedSubtype(C, D), not namedSubtype(D, C). %Fail for match
+
+%% Helpers
+%tphs:
+tphs(tph(P), params(tph(P))) :- tphs( params(tph(P))).
+tphs(P) :- tphs( params(type(C, P))).
+tphs(tph(A), params(type(C, P))) :- tphs( params(type(C, P))), tphs(tph(A), P).
+
+tphs(tph(P), params(X, tph(P))) :- tphs( params(X, tph(P))).
+tphs(tph(P), params(tph(P), X)) :- tphs( params(tph(P), X)).
+tphs(P) :- tphs( params(X, type(C, P))).
+tphs(P) :- tphs( params(type(C, P), X)).
+tphs(tph(A), params(X, type(C, P))) :- tphs( params(X, type(C, P))), tphs(tph(A), P).
+tphs(tph(A), params(type(C, P), X)) :- tphs( params(type(C, P), X)), tphs(tph(A), P).
+
+
+tphs(tph(P), params(tph(P), X, Y)) :- tphs( params(tph(P), X, Y)).
+tphs(tph(P), params(X, tph(P), Y)) :- tphs( params(X, tph(P), Y)).
+tphs(tph(P), params(X,Y,tph(P))) :- tphs( params(X, Y, tph(P))).
+tphs(P) :- tphs( params(type(C, P), X, Y)).
+tphs(P) :- tphs( params(X, type(C, P),Y)).
+tphs(P) :- tphs( params(X,Y,type(C, P))).
+tphs(tph(A), params(type(C, P), X, Y)) :- tphs( params(type(C, P), X, Y)), tphs(tph(A), P).
+tphs(tph(A), params(X, type(C, P), Y)) :- tphs( params(X, type(C, P), Y)), tphs(tph(A), P).
+tphs(tph(A), params(X, Y, type(C, P))) :- tphs( params(X, Y, type(C, P))), tphs(tph(A), P).
+
+
+#show sigma/2.
+#show sigma2/2.

src/main/java/de/dhbwstuttgart/Main.java

@@ -0,0 +1,234 @@
+package de.dhbwstuttgart;
+
+import de.dhbwstuttgart.input.ConstraintParser;
+import de.dhbwstuttgart.output.SolutionParser;
+import de.dhbwstuttgart.sat.asp.ASPGenerator;
+
+import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import de.dhbwstuttgart.sat.asp.Pair;
+
+import java.util.ArrayList;
+import java.util.LinkedHashSet;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+/**
+ * Small CLI over this project's two translation entry points, so a shell pipeline can call into
+ * it without embedding a JVM: turning a {@code .cons} constraint file into ASP facts for clingo,
+ * and turning clingo's answer-set text back into a placeholder-name-to-type JSON map.
+ */
+public class Main {
+
+    public static void main(String[] args) {
+        if (args.length < 1) {
+            printUsage();
+            System.exit(1);
+        }
+
+        try {
+            switch (args[0]) {
+                case "gen-facts" -> {
+                    if (args.length != 3) {
+                        System.err.println("gen-facts requires exactly 2 arguments: <constraints.cons> <out-facts.lp>");
+                        System.exit(1);
+                    }
+                    genFacts(args[1], args[2]);
+                }
+                case "cycle-check-facts" -> {
+                    if (args.length != 3) {
+                        System.err.println("cycle-check-facts requires exactly 2 arguments: <constraints.cons> <out-facts.lp>");
+                        System.exit(1);
+                    }
+                    cycleCheckFacts(args[1], args[2]);
+                }
+                case "gen-facts-pruned" -> {
+                    if (args.length != 4) {
+                        System.err.println("gen-facts-pruned requires exactly 3 arguments: "
+                                + "<constraints.cons> <brave-atoms.txt> <out-facts.lp>");
+                        System.exit(1);
+                    }
+                    genFactsPruned(args[1], args[2], args[3]);
+                }
+                case "parse-solution" -> {
+                    if (args.length != 3) {
+                        System.err.println("parse-solution requires exactly 2 arguments: <clingo-atoms.txt> <out-solution.json>");
+                        System.exit(1);
+                    }
+                    parseSolution(args[1], args[2]);
+                }
+                default -> {
+                    System.err.println("Unknown subcommand: " + args[0]);
+                    printUsage();
+                    System.exit(1);
+                }
+            }
+        } catch (IOException e) {
+            System.err.println("I/O error: " + e.getMessage());
+            System.exit(1);
+        }
+    }
+
+    private static void genFacts(String consFile, String outFactsFile) throws IOException {
+        String cons = Files.readString(Path.of(consFile));
+        // Both ANTLR grammars require at least one entry ("(x)+"), so a blank/empty input -
+        // e.g. a Java file with no constraint-generating constructs yet supported by
+        // JavaConstraintGenerator - would otherwise crash instead of producing an empty result.
+        if (cons.isBlank()) {
+            Files.writeString(Path.of(outFactsFile), "");
+            return;
+        }
+        var orCons = ConstraintParser.parse(cons);
+        String asp = ASPGenerator.generateASP(orCons);
+        // extendsRelation entries (e.g. "Matrix < java.util.Vector", from JavaConstraintGenerator
+        // gathering the analysed classes' own extends/implements clauses) are a separate grammar
+        // production parsed separately from the constraints/or-constraints ConstraintParser.parse
+        // already handled above - both read the same .cons text, just looking at different parts
+        // of its parse tree.
+        var extendsRelations = ConstraintParser.parseExtendsRelations(cons);
+        String extendsAsp = ASPGenerator.generateExtendsRelations(extendsRelations);
+        Files.writeString(Path.of(outFactsFile), asp + extendsAsp);
+    }
+
+    /**
+     * Writes the facts {@code cycleCheck.lp} consumes - see that file's header. Run before the
+     * real solve to find or-constraint alternatives that force a placeholder to equal a type
+     * containing itself; those can never be part of a solution and make clingo's grounder
+     * diverge if left in (see ../../ASP_BUGS.md, Bug 5).
+     */
+    private static void cycleCheckFacts(String consFile, String outFactsFile) throws IOException {
+        String cons = Files.readString(Path.of(consFile));
+        if (cons.isBlank()) {
+            Files.writeString(Path.of(outFactsFile), "");
+            return;
+        }
+        Files.writeString(Path.of(outFactsFile),
+                ASPGenerator.generateCycleCheckFacts(ConstraintParser.parse(cons)));
+    }
+
+    /**
+     * Like {@code gen-facts}, but keeps only the or-constraint alternatives named in
+     * {@code braveAtomsFile} - clingo's brave consequences from the {@code cycleCheck.lp} run,
+     * i.e. every alternative that occurs in at least one acyclic selection. An alternative
+     * outside that set belongs to no solution.
+     *
+     * <p>An or-constraint that loses every alternative would be unsatisfiable, but that cannot
+     * happen here: were it so, the cycle check itself would have been UNSATISFIABLE and the
+     * caller would have stopped before reaching this point.
+     */
+    private static void genFactsPruned(String consFile, String braveAtomsFile, String outFactsFile)
+            throws IOException {
+        String cons = Files.readString(Path.of(consFile));
+        if (cons.isBlank()) {
+            Files.writeString(Path.of(outFactsFile), "");
+            return;
+        }
+        Set<String> keep = parseChosenAtoms(Files.readString(Path.of(braveAtomsFile)));
+        var orCons = ConstraintParser.parse(cons);
+        var pruned = new ArrayList<List<Set<Pair>>>(orCons.size());
+        for (int o = 0; o < orCons.size(); o++) {
+            var alternatives = orCons.get(o);
+            var surviving = new ArrayList<Set<Pair>>(alternatives.size());
+            for (int a = 0; a < alternatives.size(); a++) {
+                if (keep.contains(o + "," + a)) surviving.add(alternatives.get(a));
+            }
+            // Defensive: an empty list would render as a malformed orCons(...) term. If the
+            // brave-consequence file was empty or unreadable, fall back to the full set rather
+            // than emit something the grammar cannot express.
+            pruned.add(surviving.isEmpty() ? alternatives : surviving);
+        }
+        String asp = ASPGenerator.generateASP(pruned);
+        var extendsRelations = ConstraintParser.parseExtendsRelations(cons);
+        Files.writeString(Path.of(outFactsFile), asp + ASPGenerator.generateExtendsRelations(extendsRelations));
+    }
+
+    /** Extracts "O,A" keys from clingo's {@code chosen(O,A)} brave-consequence atoms. */
+    private static Set<String> parseChosenAtoms(String atoms) {
+        Set<String> keys = new LinkedHashSet<>();
+        Matcher m = Pattern.compile("chosen\\((\\d+),(\\d+)\\)").matcher(atoms);
+        while (m.find()) keys.add(m.group(1) + "," + m.group(2));
+        return keys;
+    }
+
+    private static void parseSolution(String atomsFile, String outSolutionFile) throws IOException {
+        String atoms = Files.readString(Path.of(atomsFile));
+        if (atoms.isBlank()) {
+            Files.writeString(Path.of(outSolutionFile), "{\n}\n");
+            return;
+        }
+        Map<String, String> solution = SolutionParser.parse(atoms);
+        Files.writeString(Path.of(outSolutionFile), toJson(solution));
+    }
+
+    /**
+     * {@link SolutionParser#parse} strips the leading underscore off every placeholder name
+     * (its grammar folds it into the literal that precedes the identifier token), but every
+     * other artifact in this pipeline - the {@code .cons} format, the type-placeholder-position
+     * JSON from JavaConstraintGenerator - uses the full name including the leading underscore
+     * (e.g. {@code "_Foo_3"}). Restore it here so downstream consumers can match placeholder
+     * names directly with no reformatting of their own.
+     */
+    private static String toJson(Map<String, String> solution) {
+        StringBuilder sb = new StringBuilder();
+        sb.append("{\n");
+        int i = 0;
+        for (var entry : solution.entrySet()) {
+            sb.append("  ").append(quote("_" + entry.getKey())).append(": ").append(quote(entry.getValue()));
+            if (++i < solution.size()) sb.append(',');
+            sb.append('\n');
+        }
+        sb.append("}\n");
+        return sb.toString();
+    }
+
+    private static String quote(String s) {
+        StringBuilder sb = new StringBuilder(s.length() + 2);
+        sb.append('"');
+        for (int i = 0; i < s.length(); i++) {
+            char c = s.charAt(i);
+            switch (c) {
+                case '"' -> sb.append("\\\"");
+                case '\\' -> sb.append("\\\\");
+                case '\n' -> sb.append("\\n");
+                case '\r' -> sb.append("\\r");
+                case '\t' -> sb.append("\\t");
+                default -> {
+                    if (c < 0x20) {
+                        sb.append(String.format("\\u%04x", (int) c));
+                    } else {
+                        sb.append(c);
+                    }
+                }
+            }
+        }
+        sb.append('"');
+        return sb.toString();
+    }
+
+    private static void printUsage() {
+        System.err.println("Usage: Main <subcommand> [args]");
+        System.err.println();
+        System.err.println("  gen-facts <constraints.cons> <out-facts.lp>");
+        System.err.println("      Parse a .cons constraint file and write the equivalent ASP");
+        System.err.println("      facts, ready to run through clingo together with unifyDiss.lp.");
+        System.err.println();
+        System.err.println("  cycle-check-facts <constraints.cons> <out-facts.lp>");
+        System.err.println("      Write the facts for cycleCheck.lp. Run that first, with");
+        System.err.println("      --enum-mode=brave: UNSATISFIABLE means the constraint set has no");
+        System.err.println("      finite solution; otherwise its chosen(O,A) atoms say which");
+        System.err.println("      or-constraint alternatives are still worth solving.");
+        System.err.println();
+        System.err.println("  gen-facts-pruned <constraints.cons> <brave-atoms.txt> <out-facts.lp>");
+        System.err.println("      Like gen-facts, but drops every or-constraint alternative absent");
+        System.err.println("      from the cycle check's brave consequences.");
+        System.err.println();
+        System.err.println("  parse-solution <clingo-atoms.txt> <out-solution.json>");
+        System.err.println("      Parse clingo's answer-set atoms (only sigma(tph(...), type(...))");
+        System.err.println("      atoms - filter clingo's output with show.lp first) and write a");
+        System.err.println("      flat JSON object mapping each placeholder name to its solved type.");
+    }
+}

src/main/java/de/dhbwstuttgart/exceptions/DebugException.java

@@ -1,7 +0,0 @@
-package de.dhbwstuttgart.exceptions;
-
-public class DebugException extends RuntimeException{
-    public DebugException(String message){
-        System.err.println(message);
-    }
-}

src/main/java/de/dhbwstuttgart/input/ConstraintParser.java

@@ -0,0 +1,87 @@
+package de.dhbwstuttgart.input;
+
+import de.dhbwstuttgart.input.parser.ConstraintSetLexer;
+import de.dhbwstuttgart.input.parser.ConstraintSetParser;
+import de.dhbwstuttgart.sat.asp.*;
+import org.antlr.v4.runtime.CharStream;
+import org.antlr.v4.runtime.CharStreams;
+import org.antlr.v4.runtime.CommonTokenStream;
+import org.antlr.v4.runtime.tree.ParseTree;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Set;
+import java.util.stream.Collectors;
+
+public class ConstraintParser {
+
+    public static NamedType replaceGenerics(NamedType in, Set<String> genericNames){
+        List<Type> superParams = in.params().stream().map(p -> {
+            if(genericNames.contains(p.name())){
+                return (Type) new TypeParameter(p.name());
+            }else{
+                return replaceGenerics((NamedType) p, genericNames);
+            }
+        }).toList();
+        return new NamedType(in.name(), superParams);
+    }
+    public static List<ExtendsRelation> parseExtendsRelations(String cons){
+        CharStream input = CharStreams.fromString(cons);
+        de.dhbwstuttgart.input.parser.ConstraintSetLexer lexer = new ConstraintSetLexer(input);
+        CommonTokenStream tokens = new CommonTokenStream(lexer);
+        ConstraintSetParser parser = new ConstraintSetParser(tokens);
+        ConstraintSetParser.ConstraintSetContext conSet = parser.constraintSet(); //Parsen
+        List<ExtendsRelation> ret = new ArrayList<>();
+        for(var ext : conSet.extendsRelation()){
+            if(ext.typeParams()!=null){
+                var typeParams = ext.typeParams().IDENTIFIER().stream().map(x -> new TypeParameter(x.getText())).toList();
+                var typeParamNames = typeParams.stream().map(tp -> tp.name()).collect(Collectors.toSet());
+                NamedType parsedSuperType = (NamedType) parseType(ext.type());
+                parsedSuperType = replaceGenerics(parsedSuperType, typeParamNames);
+                ret.add(new ExtendsRelation(ext.IDENTIFIER().getText(), typeParams, parsedSuperType));
+            }else{
+                ret.add(new ExtendsRelation(ext.IDENTIFIER().getText(), List.of(), (NamedType) parseType(ext.type())));
+            }
+        }
+        return ret;
+    }
+public static List<List<Set<Pair>>> parse(String cons){
+    CharStream input = CharStreams.fromString(cons);
+    de.dhbwstuttgart.input.parser.ConstraintSetLexer lexer = new ConstraintSetLexer(input);
+    CommonTokenStream tokens = new CommonTokenStream(lexer);
+    ConstraintSetParser parser = new ConstraintSetParser(tokens);
+    ConstraintSetParser.ConstraintSetContext conSet = parser.constraintSet(); //Parsen
+    Set<Pair> undCons = conSet.constraints().stream().flatMap(c -> parseUndConstraint(c).stream()).collect(Collectors.toSet());
+    var ret = new ArrayList<List<Set<Pair>>>();
+    var orCons = conSet.orConstraint().stream().map(ConstraintParser::parseOrConstraint).toList();
+    if(undCons.size() > 0)ret.add(List.of(undCons));
+    ret.addAll(orCons);
+    return ret;
+}
+    private static List<Set<Pair>> parseOrConstraint(ConstraintSetParser.OrConstraintContext ctx) {
+        return ctx.constraints().stream().map(ConstraintParser::parseUndConstraint).toList();
+    }
+    private static Set<Pair> parseUndConstraint(ConstraintSetParser.ConstraintsContext ctx){
+        return ctx.constraint().stream().map(ConstraintParser::parseConstraint).collect(Collectors.toSet());
+    }
+    private static Pair parseConstraint(ConstraintSetParser.ConstraintContext ctx){
+        if(ctx.equalsCons() != null){
+            return new EqualsDot(parseType(ctx.equalsCons().type().get(0)),
+                    parseType(ctx.equalsCons().type().get(1)));
+        }else{
+            return new LessDot(parseType(ctx.subtypeCons().type().get(0)),
+                    parseType(ctx.subtypeCons().type().get(1)));
+        }
+    }
+
+private static Type parseType(ConstraintSetParser.TypeContext ctx) {
+    if(ctx.tph()!=null){
+        return new TypePlaceholder(ctx.tph().getText());
+    }else{
+        if(ctx.namedType().params() != null)
+            return new NamedType(ctx.namedType().IDENTIFIER().getText(), ctx.namedType().params().type().stream().map(ConstraintParser::parseType).toList());
+        else
+            return new NamedType(ctx.namedType().IDENTIFIER().getText(), List.of());
+    }
+}
+}

src/main/java/de/dhbwstuttgart/output/SolutionParser.java

@@ -0,0 +1,37 @@
+package de.dhbwstuttgart.output;
+
+import de.dhbwstuttgart.input.ConstraintParser;
+import de.dhbwstuttgart.sat.asp.Pair;
+import org.antlr.v4.runtime.CharStream;
+import org.antlr.v4.runtime.CharStreams;
+import org.antlr.v4.runtime.CommonTokenStream;
+
+import java.util.*;
+import java.util.stream.Collectors;
+
+record Sigma(String tphName, String typeReplacement){}
+public class SolutionParser {
+    public static Map<String, String> parse(String cons){
+        CharStream input = CharStreams.fromString(cons);
+        de.dhbwstuttgart.input.parser.SolutionLexer lexer = new de.dhbwstuttgart.input.parser.SolutionLexer(input);
+        CommonTokenStream tokens = new CommonTokenStream(lexer);
+        de.dhbwstuttgart.input.parser.SolutionParser parser = new de.dhbwstuttgart.input.parser.SolutionParser(tokens);
+        de.dhbwstuttgart.input.parser.SolutionParser.SolutionsetContext conSet = parser.solutionset(); //Parsen
+        Set<Sigma> solutions = conSet.solution().stream().map(solutionContext -> new Sigma(solutionContext.tph().IDENTIFIER().getText(), parseType(solutionContext.type()))).collect(Collectors.toSet());
+        Map<String, String> ret = new HashMap<>();
+        for(Sigma solution : solutions){
+            ret.put(solution.tphName(), solution.typeReplacement());
+        }
+       return ret;
+    }
+
+    private static String parseType(de.dhbwstuttgart.input.parser.SolutionParser.TypeContext type) {
+        String params = "";
+        if(type.params().type().size() > 0){
+            params += "<";
+            params += type.params().type().stream().map(t -> parseType(t)).collect(Collectors.joining(","));
+            params += ">";
+        }
+        return type.IDENTIFIER().getText() + params;
+    }
+}

src/main/java/de/dhbwstuttgart/sat/asp/ASPGenerator.java

@@ -0,0 +1,148 @@
+package de.dhbwstuttgart.sat.asp;
+
+import java.util.HashMap;
+import java.util.List;
+import java.util.Set;
+import java.util.stream.Collectors;
+
+public class ASPGenerator {
+    public static String generateASP(List<List<Set<Pair>>> orCons){
+        StringBuilder ret = new StringBuilder();
+        for(List<Set<Pair>> orCon : orCons){
+            ret.append(generateOrCons(orCon) + ".\n");
+        }
+        return ret.toString();
+    }
+
+    public static String generateASP(List<List<Set<Pair>>> orCons, int numCons){
+        StringBuilder ret = new StringBuilder();
+        for(List<Set<Pair>> orCon : orCons){
+            var smallerOrCon = orCon.stream().limit(numCons).collect(Collectors.toList());
+            ret.append(generateOrCons(smallerOrCon) + ".\n");
+        }
+        return ret.toString();
+    }
+
+    public static String generateOrCons(List<Set<Pair>> undCon){
+        if(undCon.size() < 2){
+            return "orCons(" + generateUndCons(undCon.getFirst()) + ", null)";
+        }else {
+            Set<Pair> first = undCon.getFirst();
+            undCon = undCon.subList(1, undCon.size());
+            return "orCons(" + generateUndCons(first) + ","+ generateOrCons(undCon) + ")";
+        }/*
+        String ret = "orCons(";
+        for(Set<Pair> uCon : undCons){
+            String aspUndConstraint = generateUndCons(uCon);
+            ret += aspUndConstraint + ",";
+        }
+        ret = ret.substring(0, ret.length()-1);
+        return ret + ")";*/
+    }
+
+    public static String generateUndCons(Set<Pair> undCon){
+        if(undCon.size() == 1){
+            return "undCons(" + undCon.iterator().next().toASP() + ", null)";
+        }else {
+            // undCOns verschachteln
+            Pair first = undCon.iterator().next();
+            undCon = undCon.stream().filter(x->!first.equals(x)).collect(Collectors.toSet());
+            return "undCons(" + first.toASP() + ","+ generateUndCons(undCon) + ")";
+        }
+    }
+
+    /**
+     * Emits the facts {@code cycleCheck.lp} consumes: one {@code alt/2} per or-constraint
+     * alternative, plus the placeholder-level edges that alternative contributes.
+     *
+     * <p>Two edge kinds, and the distinction is the whole point of the check:
+     * <ul>
+     *   <li>{@code containsEdge(O,A,P,Q)} - solving P means solving Q <em>inside</em> P's own
+     *       type, as in {@code _r <. C1<_p1>}. Only these can make a type contain itself.</li>
+     *   <li>{@code flowEdge(O,A,P,Q)} - P's type flows into Q's, as in {@code _p <. _res}.
+     *       A cycle of these alone is harmless: it means the two are the same type.</li>
+     * </ul>
+     *
+     * <p>Deliberately conservative. An edge is emitted only where the constraint genuinely
+     * forces containment, so {@code C<_q> <. _p} contributes nothing - being a supertype of
+     * {@code C<_q>} does not oblige {@code _p} to contain {@code _q}. Missing an edge only
+     * costs detection (the encoding's own Fail-Cycle remains as a backstop); inventing one
+     * would reject a satisfiable constraint set.
+     *
+     * <p>Constraints outside any or-constraint arrive here as an or-constraint with a single
+     * alternative, so they need no special handling - their edges are simply always chosen.
+     */
+    public static String generateCycleCheckFacts(List<List<Set<Pair>>> orCons) {
+        StringBuilder ret = new StringBuilder();
+        for (int o = 0; o < orCons.size(); o++) {
+            List<Set<Pair>> alternatives = orCons.get(o);
+            for (int a = 0; a < alternatives.size(); a++) {
+                ret.append("alt(").append(o).append(',').append(a).append(").\n");
+                for (Pair pair : alternatives.get(a)) {
+                    appendEdges(ret, o, a, pair);
+                }
+            }
+        }
+        return ret.toString();
+    }
+
+    private static void appendEdges(StringBuilder ret, int o, int a, Pair pair) {
+        Type left;
+        Type right;
+        boolean symmetric;
+        if (pair instanceof LessDot ld) {
+            left = ld.left();
+            right = ld.right();
+            symmetric = false;
+        } else if (pair instanceof EqualsDot ed) {
+            left = ed.left();
+            right = ed.right();
+            symmetric = true;
+        } else {
+            return;
+        }
+
+        if (left instanceof TypePlaceholder p && right instanceof TypePlaceholder q) {
+            edge(ret, "flowEdge", o, a, p.name(), q.name());
+            if (symmetric) edge(ret, "flowEdge", o, a, q.name(), p.name());
+            return;
+        }
+        // P <. C<..Q..>  /  P =. C<..Q..> : P's type has to contain Q's.
+        if (left instanceof TypePlaceholder p && right instanceof NamedType n) {
+            for (String q : placeholdersIn(n)) edge(ret, "containsEdge", o, a, p.name(), q);
+        }
+        // C<..Q..> =. P : same obligation, equality being symmetric. The <. form is NOT included.
+        if (symmetric && left instanceof NamedType n && right instanceof TypePlaceholder p) {
+            for (String q : placeholdersIn(n)) edge(ret, "containsEdge", o, a, p.name(), q);
+        }
+    }
+
+    private static void edge(StringBuilder ret, String pred, int o, int a, String from, String to) {
+        ret.append(pred).append('(').append(o).append(',').append(a)
+           .append(",\"").append(from).append("\",\"").append(to).append("\").\n");
+    }
+
+    /** Every type-placeholder name occurring anywhere inside {@code type}, at any depth. */
+    private static Set<String> placeholdersIn(Type type) {
+        Set<String> found = new java.util.LinkedHashSet<>();
+        collectPlaceholders(type, found);
+        return found;
+    }
+
+    private static void collectPlaceholders(Type type, Set<String> found) {
+        if (type instanceof TypePlaceholder p) {
+            found.add(p.name());
+        } else if (type instanceof NamedType n) {
+            for (Type param : n.params()) collectPlaceholders(param, found);
+        }
+    }
+
+    public static String generateExtendsRelations(List<ExtendsRelation> extendsRelations) {
+        String ret = "";
+        for(var x : extendsRelations){
+            NamedType subtype = new NamedType(x.subtypeName(), x.subtypeParams().stream().map(i -> (Type)i).toList());
+            ret += "subtype("+subtype.toASP()+","+x.superType().toASP()+"):-subtype("+subtype.toASP()+").";
+        }
+        return ret;
+    }
+}

src/main/java/de/dhbwstuttgart/sat/asp/EqualsDot.java

@@ -0,0 +1,8 @@
+package de.dhbwstuttgart.sat.asp;
+
+public record EqualsDot(Type left, Type right) implements Pair {
+    @Override
+    public String toASP() {
+        return "equalcons("+ left().toASP() + "," +  right().toASP() + ")";
+    }
+}

src/main/java/de/dhbwstuttgart/sat/asp/ExtendsRelation.java

@@ -0,0 +1,6 @@
+package de.dhbwstuttgart.sat.asp;
+
+import java.util.List;
+
+public record ExtendsRelation(String subtypeName, List<TypeParameter> subtypeParams, NamedType superType) {
+}

src/main/java/de/dhbwstuttgart/sat/asp/LessDot.java

@@ -0,0 +1,8 @@
+package de.dhbwstuttgart.sat.asp;
+
+public record LessDot(Type left, Type right) implements Pair {
+    @Override
+    public String toASP() {
+        return "subcons("+ left().toASP() + "," +  right().toASP() + ")";
+    }
+}

src/main/java/de/dhbwstuttgart/sat/asp/NamedType.java

@@ -0,0 +1,12 @@
+package de.dhbwstuttgart.sat.asp;
+
+import java.util.List;
+import java.util.stream.Collectors;
+
+public record NamedType(String name, List<Type> params) implements Type {
+    @Override
+    public String toASP() {
+        if(params.size() > 0)return "type(\""+name+"\",params(" + params.stream().map(Type::toASP).collect(Collectors.joining(",")) + "))";
+        return "type(\""+name+"\",null)";
+    }
+}

src/main/java/de/dhbwstuttgart/sat/asp/Pair.java

@@ -0,0 +1,5 @@
+package de.dhbwstuttgart.sat.asp;
+
+public interface Pair {
+    String toASP();
+}

src/main/java/de/dhbwstuttgart/sat/asp/Type.java

@@ -0,0 +1,6 @@
+package de.dhbwstuttgart.sat.asp;
+
+public interface Type {
+    String name();
+    String toASP();
+}

src/main/java/de/dhbwstuttgart/sat/asp/TypeParameter.java

@@ -0,0 +1,8 @@
+package de.dhbwstuttgart.sat.asp;
+
+public record TypeParameter(String name) implements Type{
+    @Override
+    public String toASP() {
+        return "X"+name;
+    }
+}

src/main/java/de/dhbwstuttgart/sat/asp/TypePlaceholder.java

@@ -0,0 +1,8 @@
+package de.dhbwstuttgart.sat.asp;
+
+public record TypePlaceholder(String name) implements Type {
+    @Override
+    public String toASP() {
+        return "tph(\""+name+"\")";
+    }
+}

src/main/java/de/dhbwstuttgart/typeinference/constraints/Constraint.java

@@ -1,69 +0,0 @@
-package de.dhbwstuttgart.typeinference.constraints;
-
-import de.dhbwstuttgart.typeinference.unify.model.UnifyPair;
-
-import java.util.Collection;
-import java.util.HashSet;
-import java.util.Set;
-
-public class Constraint<A> extends HashSet<A> {
-	private static final long serialVersionUID = 1L;
-	private Boolean isInherited = false;//wird nur für die Method-Constraints benoetigt
-	
-	/*
-	 * wird verwendet um bei der Codegenerierung die richtige Methoden - Signatur
-	 * auszuwaehlen 
-	 */
-	/*private*/ Set<A> methodSignatureConstraint = new HashSet<>();
-	
-	private Constraint<A> extendConstraint = null;
-	
-	public Constraint() {
-		super();
-	}
-	
-	public Constraint(Boolean isInherited) {
-		this.isInherited = isInherited;
-	}
-	
-	public Constraint(Boolean isInherited, Constraint<A> extendConstraint, Set<A> methodSignatureConstraint) {
-		this.isInherited = isInherited;
-		this.extendConstraint = extendConstraint;
-		this.methodSignatureConstraint = methodSignatureConstraint;
-	}
-	
-	public void setIsInherited(Boolean isInherited) {
-		this.isInherited = isInherited;
-	}
-	
-	public Boolean isInherited() {
-		return isInherited;
-	}
-	
-	public Constraint<A> getExtendConstraint() {
-		return extendConstraint;
-	}
-	
-	public void setExtendConstraint(Constraint<A> c) {
-		extendConstraint = c;
-	}
-	
-	public Set<A> getmethodSignatureConstraint() {
-		return methodSignatureConstraint;
-	}
-	
-	public void setmethodSignatureConstraint(Set<A> c) {
-		methodSignatureConstraint = c;
-	}
-
-	public String toString() {
-		return super.toString() + "\nisInherited = " + isInherited 
-				//" + extendsContraint: "  + (extendConstraint != null ? extendConstraint.toStringBase() : "null" ) 
-				+ "\n" ;
-	}
-	
-	public String toStringBase() {
-		return super.toString();
-	}
-	
-}

src/main/java/de/dhbwstuttgart/typeinference/constraints/ConstraintSet.java

@@ -1,126 +0,0 @@
-package de.dhbwstuttgart.typeinference.constraints;
-
-
-import de.dhbwstuttgart.typeinference.unify.GuavaSetOperations;
-
-import java.util.*;
-import java.util.function.BinaryOperator;
-import java.util.function.Consumer;
-import java.util.function.Function;
-import java.util.stream.Collectors;
-
-public class ConstraintSet<A> {
-    Constraint<A> undConstraints = new Constraint<>();
-    List<Set<Constraint<A>>> oderConstraints = new ArrayList<>();
-
-    public void addUndConstraint(A p){
-        undConstraints.add(p);
-    }
-
-    public void addOderConstraint(Set<Constraint<A>> methodConstraints) {
-        oderConstraints.add(methodConstraints);
-    }
-
-    public void addAllUndConstraint(Constraint<A> allUndConstraints){
-        undConstraints.addAll(allUndConstraints);
-    }
-    
-    public void addAllOderConstraint(List<Set<Constraint<A>>> allOderConstraints){
-        this.oderConstraints.addAll(allOderConstraints);
-    }
-    
-    public void addAll(ConstraintSet constraints) {
-        this.addAllUndConstraint(constraints.undConstraints);
-        this.addAllOderConstraint(constraints.oderConstraints);
-    }
-
-    @Override
-    public String toString(){
-    	BinaryOperator<String> b = (x,y) -> x+y;
-        return "\nUND:" + this.undConstraints.toString() + "\n" + 
-    		   "ODER:" + this.oderConstraints.stream().reduce("", (x,y) -> x.toString()+ "\n"  +y, b);
-        		//cartesianProduct().toString();
-    }
-
-    public Set<List<Constraint<A>>> cartesianProduct(){
-        Set<Constraint<A>> toAdd = new HashSet<>();
-        toAdd.add(undConstraints);
-        List<Set<Constraint<A>>> allConstraints = new ArrayList<>();
-        allConstraints.add(toAdd);
-        allConstraints.addAll(oderConstraints);
-        return new GuavaSetOperations().cartesianProduct(allConstraints);
-    }
-
-    public <B> ConstraintSet<B> map(Function<? super A, ? extends B> o) {
-    	Hashtable<Constraint<A>,Constraint<B>> CSA2CSB = new Hashtable<>();
-        ConstraintSet<B> ret = new ConstraintSet<>();
-        ret.undConstraints = undConstraints.stream().map(o).collect(Collectors.toCollection(Constraint<B>::new));
-        List<Set<Constraint<B>>> newOder = new ArrayList<>();
-        /*
-        for(Set<Constraint<A>> oderConstraint : oderConstraints){
-        	oderConstraint.forEach(as -> {
-            	Constraint<B> newConst = as.stream()
-            			.map(o)
-            			.collect(Collectors.toCollection(
-            					() -> new Constraint<B> (as.isInherited())));                    							
-            	CSA2CSB.put(as, newConst);} );
-        }
-        */
-        
-        for(Set<Constraint<A>> oderConstraint : oderConstraints){
-            newOder.add(
-                    oderConstraint.parallelStream().map((Constraint<A> as) -> {
-                    	
-                    	Constraint<B> newConst = as.stream()
-                    			.map(o)
-                    			.collect(Collectors.toCollection((as.getExtendConstraint() != null)
-                    					? () -> new Constraint<B> (as.isInherited(),
-                    							                   as.getExtendConstraint().stream().map(o).collect(Collectors.toCollection(Constraint::new)),
-                    							                   as.getmethodSignatureConstraint().stream().map(o).collect(Collectors.toCollection(HashSet::new))) 
-                    					: () -> new Constraint<B> (as.isInherited())
-                    			));                    							
-                    	
-                    	//CSA2CSB.put(as, newConst);
-                    	
-                    	return newConst;
-                    	
-                    	/*
-                    	Constraint<B> bs = CSA2CSB.get(as);
-                    	if (as.getExtendConstraint() != null) {
-                    		bs.setExtendConstraint(CSA2CSB.get(as.getExtendConstraint()));
-                    	}
-                    	return bs;
-                    	*/
-                    }).collect(Collectors.toSet())
-            );
-        }
-        
-        ret.oderConstraints = newOder;
-        return ret;
-    }
-    
-    public void forEach (Consumer<? super A> c) {
-        undConstraints.stream().forEach(c);
-        for(Set<Constraint<A>> oderConstraint : oderConstraints){
-            oderConstraint.parallelStream().forEach((Constraint<A> as) ->
-                            as.stream().forEach(c));
-        }
-    }
-    
-    public Set<A> getAll () {
-    	Set<A> ret = new HashSet<>();
-        ret.addAll(undConstraints);
-        for(Set<Constraint<A>> oderConstraint : oderConstraints){
-            oderConstraint.parallelStream().forEach((Constraint<A> as) -> ret.addAll(as));
-        }
-        return ret;
-    }
-    
-    public List<Set<Constraint<A>>> getOderConstraints() {
-    	return oderConstraints;
-    }
-    
-    public Set<A> getUndConstraints() {
-    	return undConstraints;
-    }
-}

src/main/java/de/dhbwstuttgart/typeinference/constraints/Pair.java

@@ -1,13 +0,0 @@
-package de.dhbwstuttgart.typeinference.constraints;
-import java.io.Serializable;
-import java.util.HashMap;
-import java.util.Map;
-
-import de.dhbwstuttgart.typeinference.unify.model.PairOperator;
-
-
-public class Pair implements Serializable
-{
-
-}
-// ino.end

src/main/java/de/dhbwstuttgart/typeinference/unify/GuavaSetOperations.java

@@ -1,23 +0,0 @@
-package de.dhbwstuttgart.typeinference.unify;
-
-import java.util.List;
-import java.util.Set;
-
-import com.google.common.collect.Sets;
-
-import de.dhbwstuttgart.typeinference.unify.interfaces.ISetOperations;
-
-/**
- * Implements set operations using google guava.
- * @author DH10STF
- *
- */
-public class GuavaSetOperations implements ISetOperations {
-
-	@Override
-	public <B> Set<List<B>> cartesianProduct(List<? extends Set<? extends B>> sets) {
-		// Wraps the call to google guava
-		return Sets.cartesianProduct(sets);
-	}
-
-}

src/main/java/de/dhbwstuttgart/typeinference/unify/MartelliMontanariUnify.java

@@ -1,108 +0,0 @@
-package de.dhbwstuttgart.typeinference.unify;
-
-import java.util.ArrayList;
-import java.util.HashSet;
-import java.util.Iterator;
-import java.util.Optional;
-import java.util.Set;
-import java.util.stream.Collectors;
-
-import de.dhbwstuttgart.typeinference.unify.interfaces.IUnify;
-import de.dhbwstuttgart.typeinference.unify.model.PairOperator;
-import de.dhbwstuttgart.typeinference.unify.model.PlaceholderType;
-import de.dhbwstuttgart.typeinference.unify.model.TypeParams;
-import de.dhbwstuttgart.typeinference.unify.model.Unifier;
-import de.dhbwstuttgart.typeinference.unify.model.UnifyPair;
-import de.dhbwstuttgart.typeinference.unify.model.UnifyType;
-
-/**
- * Implementation of the Martelli-Montanari unification algorithm.
- * @author Florian Steurer
- */
-public class MartelliMontanariUnify implements IUnify {
-
-	@Override
-	public Optional<Unifier> unify(Set<UnifyType> terms) {
-		// Sets with less than 2 terms are trivially unified
-		if(terms.size() < 2)
-			return Optional.of(Unifier.identity());
-		
-		// For the the set of terms {t1,...,tn},
-		// build a list of equations {(t1 = t2), (t2 = t3), (t3 = t4), ....}
-		ArrayList<UnifyPair> termsList = new ArrayList<UnifyPair>();
-		Iterator<UnifyType> iter = terms.iterator();
-		UnifyType prev = iter.next();
-		while(iter.hasNext()) {
-			UnifyType next = iter.next();
-			termsList.add(new UnifyPair(prev, next, PairOperator.EQUALSDOT));
-			prev = next;
-		}
-		
-		// Start with the identity unifier. Substitutions will be added later.
-		Unifier mgu = Unifier.identity();
-		
-		// Apply rules while possible
-		int idx = 0;
-		while(idx < termsList.size()) {
-			UnifyPair pair = termsList.get(idx);
-			UnifyType rhsType = pair.getRhsType();
-			UnifyType lhsType = pair.getLhsType();
-			TypeParams rhsTypeParams = rhsType.getTypeParams();
-			TypeParams lhsTypeParams = lhsType.getTypeParams();
-			
-			// REDUCE - Rule
-			if(!(rhsType instanceof PlaceholderType) && !(lhsType instanceof PlaceholderType)) {
-				Set<UnifyPair> result = new HashSet<>();
-				
-				// f<...> = g<...> with f != g are not unifiable
-				if(!rhsType.getName().equals(lhsType.getName()))
-					return Optional.empty(); // conflict
-				// f<t1,...,tn> = f<s1,...,sm> are not unifiable
-				if(rhsTypeParams.size() != lhsTypeParams.size())
-					return Optional.empty(); // conflict
-				// f = g is not unifiable (cannot be f = f because erase rule would have been applied)
-				//if(rhsTypeParams.size() == 0)
-					//return Optional.empty();
-					
-				// Unpack the arguments
-				for(int i = 0; i < rhsTypeParams.size(); i++)
-					result.add(new UnifyPair(rhsTypeParams.get(i), lhsTypeParams.get(i), PairOperator.EQUALSDOT));
-				
-				termsList.remove(idx);
-				termsList.addAll(result);
-				continue;
-			}
-			
-			// DELETE - Rule
-			if(pair.getRhsType().equals(pair.getLhsType())) {
-				termsList.remove(idx);
-				continue; 
-			}
-
-			// SWAP - Rule
-			if(!(lhsType instanceof PlaceholderType) && (rhsType instanceof PlaceholderType)) {
-				termsList.remove(idx);
-				termsList.add(new UnifyPair(rhsType, lhsType, PairOperator.EQUALSDOT));
-				continue;
-			}
-			
-			// OCCURS-CHECK
-			if(pair.getLhsType() instanceof PlaceholderType
-					&& pair.getRhsType().getTypeParams().occurs((PlaceholderType) pair.getLhsType())) 
-				return Optional.empty();
-			
-			// SUBST - Rule
-			if(lhsType instanceof PlaceholderType) {
-				mgu.add((PlaceholderType) lhsType, rhsType);
-				//PL 2018-04-01 nach checken, ob es richtig ist, dass keine Substitutionen uebergeben werden muessen. 
-				termsList = termsList.stream().map(x -> mgu.apply(x)).collect(Collectors.toCollection(ArrayList::new));
-				idx = idx+1 == termsList.size() ? 0 : idx+1;
-				continue;
-			}
-			
-			idx++;
-		}
-		
-		return Optional.of(mgu);
-	}
-}

src/main/java/de/dhbwstuttgart/typeinference/unify/Match.java

@@ -1,92 +0,0 @@
-package de.dhbwstuttgart.typeinference.unify;
-
-import java.util.ArrayList;
-import java.util.HashSet;
-import java.util.Iterator;
-import java.util.Optional;
-import java.util.Set;
-import java.util.stream.Collectors;
-
-import de.dhbwstuttgart.typeinference.unify.interfaces.IMatch;
-import de.dhbwstuttgart.typeinference.unify.model.PairOperator;
-import de.dhbwstuttgart.typeinference.unify.model.PlaceholderType;
-import de.dhbwstuttgart.typeinference.unify.model.TypeParams;
-import de.dhbwstuttgart.typeinference.unify.model.Unifier;
-import de.dhbwstuttgart.typeinference.unify.model.UnifyPair;
-import de.dhbwstuttgart.typeinference.unify.model.UnifyType;
-
-/**
- * Implementation of match derived from unification algorithm.
- * @author Martin Pluemicke
- */
-public class Match implements IMatch {
-
-	@Override
-	//vorne muss das Pattern stehen
-	//A<X> =. A<Integer> ==> True
-	//A<Integer> =. A<X> ==> False
-	public Optional<Unifier> match(ArrayList<UnifyPair> termsList) {
-		
-		// Start with the identity unifier. Substitutions will be added later.
-		Unifier mgu = Unifier.identity();
-		
-		// Apply rules while possible
-		int idx = 0;
-		while(idx < termsList.size()) {
-			UnifyPair pair = termsList.get(idx);
-			UnifyType rhsType = pair.getRhsType();
-			UnifyType lhsType = pair.getLhsType();
-			TypeParams rhsTypeParams = rhsType.getTypeParams();
-			TypeParams lhsTypeParams = lhsType.getTypeParams();
-			
-			// REDUCE - Rule
-			if(!(rhsType instanceof PlaceholderType) && !(lhsType instanceof PlaceholderType)) {
-				Set<UnifyPair> result = new HashSet<>();
-				
-				// f<...> = g<...> with f != g are not unifiable
-				if(!rhsType.getName().equals(lhsType.getName()))
-					return Optional.empty(); // conflict
-				// f<t1,...,tn> = f<s1,...,sm> are not unifiable
-				if(rhsTypeParams.size() != lhsTypeParams.size())
-					return Optional.empty(); // conflict
-				// f = g is not unifiable (cannot be f = f because erase rule would have been applied)
-				//if(rhsTypeParams.size() == 0)
-					//return Optional.empty();
-					
-				// Unpack the arguments
-				for(int i = 0; i < rhsTypeParams.size(); i++)
-					result.add(new UnifyPair(lhsTypeParams.get(i), rhsTypeParams.get(i), PairOperator.EQUALSDOT));
-				
-				termsList.remove(idx);
-				termsList.addAll(result);
-				continue;
-			}
-			
-			// DELETE - Rule
-			if(pair.getRhsType().equals(pair.getLhsType())) {
-				termsList.remove(idx);
-				continue; 
-			}
-
-			// SWAP - Rule
-			if(!(lhsType instanceof PlaceholderType) && (rhsType instanceof PlaceholderType)) {
-				return Optional.empty(); // conflict
-			}
-			
-			// OCCURS-CHECK
-			//deleted
-			
-			// SUBST - Rule
-			if(lhsType instanceof PlaceholderType) {
-				mgu.add((PlaceholderType) lhsType, rhsType);
-				termsList = termsList.stream().map(mgu::applyleft).collect(Collectors.toCollection(ArrayList::new));
-				idx = idx+1 == termsList.size() ? 0 : idx+1;
-				continue;
-			}
-			
-			idx++;
-		}
-		
-		return Optional.of(mgu);
-	}
-}

src/main/java/de/dhbwstuttgart/typeinference/unify/TypeUnify.java

@@ -1,125 +0,0 @@
-package de.dhbwstuttgart.typeinference.unify;
-
-import java.io.FileWriter;
-import java.io.IOException;
-import java.io.Writer;
-import java.util.ArrayList;
-import java.util.List;
-import java.util.Set;
-import java.util.concurrent.ForkJoinPool;
-
-import de.dhbwstuttgart.typeinference.constraints.Constraint;
-import de.dhbwstuttgart.typeinference.constraints.ConstraintSet;
-import de.dhbwstuttgart.typeinference.constraints.Pair;
-import de.dhbwstuttgart.typeinference.unify.interfaces.IFiniteClosure;
-import de.dhbwstuttgart.typeinference.unify.model.FiniteClosure;
-import de.dhbwstuttgart.typeinference.unify.model.UnifyPair;
-
-public class TypeUnify {
-	
-	public static Writer statistics;
-	/**
-	 * unify parallel ohne result modell
-	 * @param undConstrains
-	 * @param oderConstraints
-	 * @param fc
-	 * @param logFile
-	 * @param log
-	 * @param cons
-	 * @return
-	 */
-	public Set<Set<UnifyPair>> unify(Set<UnifyPair> undConstrains, List<Set<Constraint<UnifyPair>>> oderConstraints, IFiniteClosure fc, Writer logFile, Boolean log, UnifyResultModel ret, UnifyTaskModel usedTasks) {
-		TypeUnifyTask unifyTask = new TypeUnifyTask(undConstrains, oderConstraints, fc, true, logFile, log, 0, ret, usedTasks);
-		ForkJoinPool pool = new ForkJoinPool();
-		pool.invoke(unifyTask);
-		Set<Set<UnifyPair>> res =  unifyTask.join();
-		try {
-			logFile.write("\nnoShortendElements: " + unifyTask.noShortendElements + "\n");
-			logFile.flush();
-		}
-		catch (IOException e) {
-			System.err.println("no log-File");
-		}
-		return res;
-	}
-	
-	/**
-	 * unify asynchron mit Rückgabe UnifyResultModel ohne dass alle results gesammelt sind
-	 * @param undConstrains
-	 * @param oderConstraints
-	 * @param fc
-	 * @param logFile
-	 * @param log
-	 * @param cons
-	 * @param ret
-	 * @return
-	 */
-	public UnifyResultModel unifyAsync(Set<UnifyPair> undConstrains, List<Set<Constraint<UnifyPair>>> oderConstraints, IFiniteClosure fc, Writer logFile, Boolean log, UnifyResultModel ret, UnifyTaskModel usedTasks) {
-		TypeUnifyTask unifyTask = new TypeUnifyTask(undConstrains, oderConstraints, fc, true, logFile, log, 0, ret, usedTasks);
-		ForkJoinPool pool = new ForkJoinPool();
-		pool.invoke(unifyTask);
-		return ret;
-	}
-	
-	/**
-	 * unify parallel mit Rückgabe UnifyResultModel nachdem alle results gesammelt sind
-	 * @param undConstrains
-	 * @param oderConstraints
-	 * @param fc
-	 * @param logFile
-	 * @param log
-	 * @param cons
-	 * @param ret
-	 * @return
-	 */
-	public UnifyResultModel unifyParallel(Set<UnifyPair> undConstrains, List<Set<Constraint<UnifyPair>>> oderConstraints, IFiniteClosure fc, Writer logFile, Boolean log, UnifyResultModel ret, UnifyTaskModel usedTasks) {
-		TypeUnifyTask unifyTask = //new TypeUnifyTask(undConstrains, oderConstraints, fc, true, logFile, log, 0, ret, usedTasks);
-				new TypeUnifyTask(undConstrains, oderConstraints, fc, true, logFile, log, 0, ret, usedTasks, statistics);
-		ForkJoinPool pool = new ForkJoinPool();
-		pool.invoke(unifyTask);
-		Set<Set<UnifyPair>> res =  unifyTask.join();
-		try {
-			logFile.write("\nnoShortendElements: " + unifyTask.noShortendElements +"\n");
-			logFile.flush();
-			unifyTask.statistics.write("Backtracking: " + unifyTask.noBacktracking);
-			unifyTask.statistics.write("\nLoops: " + unifyTask.noLoop);
-		}
-		catch (IOException e) {
-			System.err.println("no log-File");
-		}
-		return ret;
-	}
-	
-	/*
-	public Set<Set<UnifyPair>> unifySequential(Set<UnifyPair> eq, IFiniteClosure fc, FileWriter logFile, Boolean log) {
-		TypeUnifyTask unifyTask = new TypeUnifyTask(eq, fc, false, logFile, log);
-		Set<Set<UnifyPair>> res = unifyTask.compute();
-		return res;
-	}
-	*/
-	
-	/**
-	 * unify sequentiell mit oderconstraints
-	 * @param undConstrains
-	 * @param oderConstraints
-	 * @param fc
-	 * @param logFile
-	 * @param log
-	 * @param cons
-	 * @return
-	 */
-	public Set<Set<UnifyPair>> unifyOderConstraints(Set<UnifyPair> undConstrains, List<Set<Constraint<UnifyPair>>> oderConstraints, IFiniteClosure fc, Writer logFile, Boolean log, UnifyResultModel ret, UnifyTaskModel usedTasks) {
-		TypeUnifyTask unifyTask = new TypeUnifyTask(undConstrains, oderConstraints, fc, false, logFile, log, 0, ret, usedTasks);
-		unifyTask.statistics = statistics;
-		Set<Set<UnifyPair>> res = unifyTask.compute();
-		try {
-			logFile.write("\nnoShortendElements: " + unifyTask.noShortendElements +"\n");
-			logFile.flush();
-		}
-		catch (IOException e) {
-			System.err.println("no log-File");
-		}
-		return res;
-	}
-
-}

src/main/java/de/dhbwstuttgart/typeinference/unify/TypeUnify2Task.java

@@ -1,76 +0,0 @@
-package de.dhbwstuttgart.typeinference.unify;
-
-import java.io.FileWriter;
-import java.io.IOException;
-import java.io.Writer;
-import java.util.ArrayList;
-import java.util.HashSet;
-import java.util.List;
-import java.util.Set;
-
-import de.dhbwstuttgart.typeinference.constraints.Constraint;
-import de.dhbwstuttgart.typeinference.constraints.ConstraintSet;
-import de.dhbwstuttgart.typeinference.constraints.Pair;
-import de.dhbwstuttgart.typeinference.unify.interfaces.IFiniteClosure;
-import de.dhbwstuttgart.typeinference.unify.model.UnifyPair;
-
-public class TypeUnify2Task extends TypeUnifyTask {
-       
-       Set<Set<UnifyPair>> setToFlatten;
-       Set<UnifyPair> methodSignatureConstraintUebergabe;
-
-       //statistics
-       TypeUnify2Task(Set<Set<UnifyPair>> setToFlatten, Set<UnifyPair> eq, 
-    		   List<Set<Constraint<UnifyPair>>> oderConstraints, 
-    		   Set<UnifyPair> nextSetElement, 
-    		   IFiniteClosure fc, boolean parallel, Writer logFile, Boolean log, int rekTiefe, UnifyResultModel urm, UnifyTaskModel usedTasks, 
-    		   Set<UnifyPair> methodSignatureConstraintUebergabe, Writer statistics) {
-    	   this(setToFlatten, eq, oderConstraints, nextSetElement, fc, parallel, logFile, log, rekTiefe, urm, usedTasks, methodSignatureConstraintUebergabe );
-    	   
-       }
-       
-       public TypeUnify2Task(Set<Set<UnifyPair>> setToFlatten, Set<UnifyPair> eq, List<Set<Constraint<UnifyPair>>> oderConstraints, Set<UnifyPair> nextSetElement, IFiniteClosure fc, boolean parallel, Writer logFile, Boolean log, int rekTiefe, UnifyResultModel urm, UnifyTaskModel usedTasks, Set<UnifyPair> methodSignatureConstraintUebergabe) {
-               super(eq, oderConstraints, fc, parallel, logFile, log, rekTiefe, urm, usedTasks);
-               this.setToFlatten = setToFlatten;
-               this.nextSetElement = nextSetElement;
-               this.methodSignatureConstraintUebergabe = methodSignatureConstraintUebergabe;
-       }
-       
-       Set<UnifyPair> getNextSetElement() {
-    	   return nextSetElement;
-       }
-       
-       @Override
-       protected Set<Set<UnifyPair>> compute() {
-               if (one) {
-                       System.out.println("two");
-               }
-               one = true;
-               Set<Set<UnifyPair>> res = unify2(setToFlatten, eq, oderConstraintsField, fc, parallel, rekTiefeField, methodSignatureConstraintUebergabe);
-               /*if (isUndefinedPairSetSet(res)) { 
-                       return new HashSet<>(); }
-               else
-               */ 
-               //writeLog("xxx");
-               //noOfThread--;
-               synchronized (usedTasks) {
-            	   if (this.myIsCancelled()) {
-   						return new HashSet<>();
-   					}
-   					else {
-   						return res;
-   					}
-   				}
-       	}
-       
-       public void closeLogFile() {
-
-           try {
-				logFile.close();
-			}
-			catch (IOException ioE) {
-				System.err.println("no log-File" + thNo);
-			}
-           
-       }
-}

src/main/java/de/dhbwstuttgart/typeinference/unify/Unifikationsalgorithmus.java

@@ -1,11 +0,0 @@
-package de.dhbwstuttgart.typeinference.unify;
-
-import java.util.Set;
-
-import de.dhbwstuttgart.typeinference.unify.model.UnifyPair;
-
-public interface Unifikationsalgorithmus {
-
-    public Set<Set<UnifyPair>> apply (Set<UnifyPair> E);
-
-}

src/main/java/de/dhbwstuttgart/typeinference/unify/UnifyResultEvent.java

@@ -1,18 +0,0 @@
-package de.dhbwstuttgart.typeinference.unify;
-
-import java.sql.ResultSet;
-import java.util.List;
-
-
-public class UnifyResultEvent {
-	
-	private List<ResultSet> newTypeResult;
-
-	public UnifyResultEvent(List<ResultSet> newTypeResult) {
-		this.newTypeResult = newTypeResult;
-	}
-
-	public List<ResultSet> getNewTypeResult() {
-		return newTypeResult;
-	}
-}

src/main/java/de/dhbwstuttgart/typeinference/unify/UnifyResultListener.java

@@ -1,7 +0,0 @@
-package de.dhbwstuttgart.typeinference.unify;
-
-public interface UnifyResultListener {
-
-	void onNewTypeResultFound(UnifyResultEvent evt);
-
-}

src/main/java/de/dhbwstuttgart/typeinference/unify/UnifyResultListenerImpl.java

@@ -1,21 +0,0 @@
-package de.dhbwstuttgart.typeinference.unify;
-
-import java.sql.ResultSet;
-import java.util.ArrayList;
-import java.util.List;
-
-import de.dhbwstuttgart.typeinference.unify.model.UnifyPair;
-
-public class UnifyResultListenerImpl implements UnifyResultListener {
-
-	List<ResultSet> results = new ArrayList<>();
-	
-	public synchronized void onNewTypeResultFound(UnifyResultEvent evt) {
-		results.addAll(evt.getNewTypeResult());
-	}
-	
-	public List<ResultSet> getResults() {
-		return results;
-	}
-
-}

src/main/java/de/dhbwstuttgart/typeinference/unify/UnifyResultModel.java

@@ -1,41 +0,0 @@
-package de.dhbwstuttgart.typeinference.unify;
-
-import java.sql.ResultSet;
-import java.util.ArrayList;
-import java.util.HashSet;
-import java.util.List;
-import java.util.Optional;
-import java.util.Set;
-import java.util.stream.Collectors;
-
-import de.dhbwstuttgart.typeinference.constraints.ConstraintSet;
-import de.dhbwstuttgart.typeinference.unify.interfaces.IFiniteClosure;
-import de.dhbwstuttgart.typeinference.unify.model.PairOperator;
-import de.dhbwstuttgart.typeinference.unify.model.UnifyPair;
-
-public class UnifyResultModel {
-	
-	ConstraintSet<de.dhbwstuttgart.typeinference.constraints.Pair> cons;
-	
-	IFiniteClosure fc;
-	
-	public UnifyResultModel(ConstraintSet<de.dhbwstuttgart.typeinference.constraints.Pair> cons,
-					 IFiniteClosure fc) {
-		this.cons = cons;
-		this.fc = fc;
-	}
-	
-	private List<UnifyResultListener> listeners = new ArrayList<>();
-	
-	public void addUnifyResultListener(UnifyResultListener listenerToAdd) {
-		listeners.add(listenerToAdd);
-	}
-
-	public void removeUnifyResultListener(UnifyResultListener listenerToRemove) {
-		listeners.remove(listenerToRemove);
-	}
-	
-	public void notify(Set<Set<UnifyPair>> eqPrimePrimeSet) {
-
-	}
-}

src/main/java/de/dhbwstuttgart/typeinference/unify/UnifyTaskModel.java

@@ -1,18 +0,0 @@
-package de.dhbwstuttgart.typeinference.unify;
-
-import java.util.ArrayList;
-
-public class UnifyTaskModel {
-
-	ArrayList<TypeUnifyTask> usedTasks = new ArrayList<>();
-	
-	public synchronized void add(TypeUnifyTask t) {
-		usedTasks.add(t);
-	}
-    
-    public synchronized void cancel() {
-    	for(TypeUnifyTask t : usedTasks) {
-    		t.myCancel(true);
-    	}
-    }
-}

src/main/java/de/dhbwstuttgart/typeinference/unify/distributeVariance.java

@@ -1,54 +0,0 @@
-package de.dhbwstuttgart.typeinference.unify;
-
-import java.util.ArrayList;
-import java.util.Arrays;
-import java.util.List;
-import java.util.stream.Collectors;
-
-import de.dhbwstuttgart.typeinference.unify.model.FunNType;
-import de.dhbwstuttgart.typeinference.unify.model.PlaceholderType;
-import de.dhbwstuttgart.typeinference.unify.model.TypeParams;
-import de.dhbwstuttgart.typeinference.unify.model.UnifyType;
-
-public class distributeVariance extends visitUnifyTypeVisitor<Integer> {
-	
-	public static int inverseVariance(int variance) { 
-		Integer ret = 0;
-		if (variance == 1) {
-		   ret = -1;
-		}
-		if (variance == -1) {
-			ret = 1;
-		}
-		return ret;
-	}
-
-
-	@Override
-	public PlaceholderType visit(PlaceholderType phty, Integer ht) {
-		if (ht != 0) {
-			if (phty.getVariance() == 0) {
-				phty.setVariance(ht);
-			}
-			//PL 2018-05-17 urspruengliche Variance nicht veraendern
-			//else if (phty.getVariance() != ht) {
-			//	phty.setVariance(0);
-			//}
-		}
-		return phty;
-	}
-	
-	public FunNType visit(FunNType funnty, Integer ht) {
-		List<UnifyType> param = new ArrayList<>(funnty.getTypeParams().get().length);
-		param.addAll(Arrays.asList(funnty.getTypeParams().get()));
-		UnifyType resultType = param.remove(param.size()-1);
-		Integer htInverse = inverseVariance(ht);
-		param = param.stream()
-				     .map(x -> x.accept(this, htInverse))
-				     .collect(Collectors.toCollection(ArrayList::new));
-		param.add(resultType.accept(this, ht));
-		return FunNType.getFunNType(new TypeParams(param));
-	}
-	
-	
-}

src/main/java/de/dhbwstuttgart/typeinference/unify/freshPlaceholder.java

@@ -1,15 +0,0 @@
-package de.dhbwstuttgart.typeinference.unify;
-
-
-import java.util.HashMap;
-
-import de.dhbwstuttgart.typeinference.unify.model.PlaceholderType;
-
-
-public class freshPlaceholder extends visitUnifyTypeVisitor<HashMap<PlaceholderType,PlaceholderType>> {
-
-	@Override
-	public PlaceholderType visit(PlaceholderType phty, HashMap<PlaceholderType,PlaceholderType> ht) {
-		return ht.get(phty);
-	}	
-}

src/main/java/de/dhbwstuttgart/typeinference/unify/interfaces/IFiniteClosure.java

@@ -1,68 +0,0 @@
-package de.dhbwstuttgart.typeinference.unify.interfaces;
-
-import java.util.Optional;
-import java.util.Set;
-
-import de.dhbwstuttgart.typeinference.unify.model.ExtendsType;
-import de.dhbwstuttgart.typeinference.unify.model.FunNType;
-import de.dhbwstuttgart.typeinference.unify.model.PairOperator;
-import de.dhbwstuttgart.typeinference.unify.model.PlaceholderType;
-import de.dhbwstuttgart.typeinference.unify.model.ReferenceType;
-import de.dhbwstuttgart.typeinference.unify.model.SuperType;
-import de.dhbwstuttgart.typeinference.unify.model.UnifyType;
-
-/**
- * 
- * @author Florian Steurer
- */
-public interface IFiniteClosure {
-	
-	public void setLogTrue();
-	/**
-	 * Returns all types of the finite closure that are subtypes of the argument.
-	 * @return The set of subtypes of the argument.
-	 */
-	public Set<UnifyType> smaller(UnifyType type, Set<UnifyType> fBounded);
-	
-	/**
-	 * Returns all types of the finite closure that are supertypes of the argument.
-	 * @return The set of supertypes of the argument.
-	 */
-	public Set<UnifyType> greater(UnifyType type, Set<UnifyType> fBounded);
-
-	/**
-	 * Wo passt Type rein?
-	 * @param type
-	 * @return
-	 */
-	public Set<UnifyType> grArg(UnifyType type, Set<UnifyType> fBounded);
-	
-	/**
-	 * Was passt in Type rein?
-	 * @param type
-	 * @return
-	 */
-	public Set<UnifyType> smArg(UnifyType type, Set<UnifyType> fBounded);
-	
-	public Set<UnifyType> grArg(ReferenceType type, Set<UnifyType> fBounded);
-	public Set<UnifyType> smArg(ReferenceType type, Set<UnifyType> fBounded);
-	
-	public Set<UnifyType> grArg(ExtendsType type, Set<UnifyType> fBounded);
-	public Set<UnifyType> smArg(ExtendsType type, Set<UnifyType> fBounded);
-	
-	public Set<UnifyType> grArg(SuperType type, Set<UnifyType> fBounded);
-	public Set<UnifyType> smArg(SuperType type, Set<UnifyType> fBounded);
-
-	public Set<UnifyType> grArg(PlaceholderType type, Set<UnifyType> fBounded);
-	public Set<UnifyType> smArg(PlaceholderType type, Set<UnifyType> fBounded);
-
-	public Set<UnifyType> grArg(FunNType type, Set<UnifyType> fBounded);
-	public Set<UnifyType> smArg(FunNType type, Set<UnifyType> fBounded);
-	
-	public Optional<UnifyType> getLeftHandedType(String typeName);
-	public Set<UnifyType> getAncestors(UnifyType t);
-	public Set<UnifyType> getChildren(UnifyType t);
-	public Set<UnifyType> getAllTypesByName(String typeName);
-
-	public int compare(UnifyType rhsType, UnifyType rhsType2, PairOperator pairop);
-}

src/main/java/de/dhbwstuttgart/typeinference/unify/interfaces/IMatch.java

@@ -1,29 +0,0 @@
-package de.dhbwstuttgart.typeinference.unify.interfaces;
-
-import java.util.ArrayList;
-import java.util.Arrays;
-import java.util.Optional;
-import java.util.Set;
-import java.util.stream.Collectors;
-
-import de.dhbwstuttgart.typeinference.unify.model.UnifyType;
-import de.dhbwstuttgart.typeinference.unify.model.Unifier;
-import de.dhbwstuttgart.typeinference.unify.model.UnifyPair;
-
-/**
- * Match
- * @author Martin Pluemicke
- * abgeleitet aus IUnify.java
- */
-public interface IMatch {
-	
-	/**
-	 * Finds the most general matcher sigma of the set {t1 =. t1',...,tn =. tn'} so that
-	 * sigma(t1) = t1' , ... sigma(tn) = tn'. 
-	 * @param terms The set of terms to be matched
-	 * @return An optional of the most general matcher if it exists or an empty optional if there is no matcher.
-	 */
-	public Optional<Unifier> match(ArrayList<UnifyPair> termsList);
-	
-
-}

src/main/java/de/dhbwstuttgart/typeinference/unify/interfaces/IRuleSet.java

@@ -1,103 +0,0 @@
-package de.dhbwstuttgart.typeinference.unify.interfaces;
-
-import java.util.List;
-import java.util.Optional;
-import java.util.Set;
-
-import de.dhbwstuttgart.typeinference.constraints.Constraint;
-import de.dhbwstuttgart.typeinference.unify.model.UnifyPair;
-
-/**
- * Contains the inference rules that are applied to the set Eq.
- * @author Florian Steurer
- */
-public interface IRuleSet {
-	
-	public Optional<UnifyPair> reduceUp(UnifyPair pair);
-	public Optional<UnifyPair> reduceLow(UnifyPair pair);
-	public Optional<UnifyPair> reduceUpLow(UnifyPair pair);
-	public Optional<Set<UnifyPair>> reduceExt(UnifyPair pair, IFiniteClosure fc);
-	public Optional<Set<UnifyPair>> reduceSup(UnifyPair pair, IFiniteClosure fc);
-	public Optional<Set<UnifyPair>> reduceEq(UnifyPair pair);
-	public Optional<Set<UnifyPair>> reduce1(UnifyPair pair, IFiniteClosure fc);
-	public Optional<Set<UnifyPair>> reduce2(UnifyPair pair);
-	
-	/*
-	 * Missing Reduce-Rules for Wildcards
-	 */
-	public Optional<UnifyPair> reduceWildcardLow(UnifyPair pair);
-	public Optional<UnifyPair> reduceWildcardLowRight(UnifyPair pair);
-	public Optional<UnifyPair> reduceWildcardUp(UnifyPair pair);
-	public Optional<UnifyPair> reduceWildcardUpRight(UnifyPair pair);
-	
-	/*
-	 * vgl. JAVA_BSP/Wildcard6.java
-	public Optional<UnifyPair> reduceWildcardLowUp(UnifyPair pair);
-	public Optional<UnifyPair> reduceWildcardUpLow(UnifyPair pair);
-	public Optional<UnifyPair> reduceWildcardLeft(UnifyPair pair);
-	 */
-	
-	/*
-	 * Additional Rules which replace cases of the cartesian product
-	 */
-	
-	/**
-	 * Rule that replaces the fourth case of the cartesian product where (a <.? Theta)
-	 */
-	public Optional<UnifyPair> reduceTph(UnifyPair pair);
-	
-	/**
-	 * Rule that replaces the sixth case of the cartesian product where (? ext Theta <.? a)
-	 */
-	public Optional<Set<UnifyPair>> reduceTphExt(UnifyPair pair);
-	
-	/**
-	 * Rule that replaces the fourth case of the cartesian product where (? sup Theta <.? a)
-	 */
-	public Optional<Set<UnifyPair>> reduceTphSup(UnifyPair pair);
-	
-	/*
-	 * FunN Rules
-	 */
-	public Optional<Set<UnifyPair>> reduceFunN(UnifyPair pair);
-	public Optional<Set<UnifyPair>> greaterFunN(UnifyPair pair);
-	public Optional<Set<UnifyPair>> smallerFunN(UnifyPair pair);
-	
-	/**
-	 * Checks whether the erase1-Rule applies to the pair.
-	 * @return True if the pair is erasable, false otherwise.
-	 */
-	public boolean erase1(UnifyPair pair, IFiniteClosure fc);
-	
-	/**
-	 * Checks whether the erase2-Rule applies to the pair.
-	 * @return True if the pair is erasable, false otherwise.
-	 */
-	public boolean erase2(UnifyPair pair, IFiniteClosure fc);
-	
-	/**
-	 * Checks whether the erase3-Rule applies to the pair.
-	 * @return True if the pair is erasable, false otherwise.
-	 */
-	public boolean erase3(UnifyPair pair);
-	
-	public Optional<UnifyPair> swap(UnifyPair pair);
-	
-	public Optional<UnifyPair> adapt(UnifyPair pair, IFiniteClosure fc);
-	public Optional<UnifyPair> adaptExt(UnifyPair pair, IFiniteClosure fc);
-	public Optional<UnifyPair> adaptSup(UnifyPair pair, IFiniteClosure fc);
-	
-	/**
-	 * Applies the subst-Rule to a set of pairs (usually Eq').
-	 * @param pairs The set of pairs where the subst rule should apply.
-	 * @return An optional of the modified set, if there were any substitutions. An empty optional if there were no substitutions.
-	 */
-	public Optional<Set<UnifyPair>> subst(Set<UnifyPair> pairs, List<Set<Constraint<UnifyPair>>> oderConstraints);
-	
-	/**
-	 * Applies the subst-Rule to a set of pairs (usually Eq').
-	 * @param pairs The set of pairs where the subst rule should apply.
-	 * @return An optional of the modified set, if there were any substitutions. An empty optional if there were no substitutions.
-	 */
-	public Optional<Set<UnifyPair>> subst(Set<UnifyPair> pairs);
-}

src/main/java/de/dhbwstuttgart/typeinference/unify/interfaces/ISetOperations.java

@@ -1,16 +0,0 @@
-package de.dhbwstuttgart.typeinference.unify.interfaces;
-
-import java.util.List;
-import java.util.Set;
-
-/**
- * Contains operations on sets.
- * @author Florian Steurer
- */
-public interface ISetOperations {
-	/**
-	 * Calculates the cartesian product of the sets.
-	 * @return The cartesian product
-	 */
-	<B> Set<List<B>> cartesianProduct(List<? extends Set<? extends B>> sets);
-}

src/main/java/de/dhbwstuttgart/typeinference/unify/interfaces/IUnify.java

@@ -1,35 +0,0 @@
-package de.dhbwstuttgart.typeinference.unify.interfaces;
-
-import java.util.Arrays;
-import java.util.Optional;
-import java.util.Set;
-import java.util.stream.Collectors;
-
-import de.dhbwstuttgart.typeinference.unify.model.UnifyType;
-import de.dhbwstuttgart.typeinference.unify.model.Unifier;
-
-/**
- * Standard unification algorithm (e.g. Robinson, Paterson-Wegman, Martelli-Montanari)
- * @author Florian Steurer
- */
-public interface IUnify {
-	
-	/**
-	 * Finds the most general unifier sigma of the set {t1 =. t1',...,tn =. tn'} so that
-	 * sigma(t1) = sigma(t1') , ... sigma(tn) = sigma(tn'). 
-	 * @param terms The set of terms to be unified
-	 * @return An optional of the most general unifier if it exists or an empty optional if there is no unifier.
-	 */
-	public Optional<Unifier> unify(Set<UnifyType> terms);
-	
-	/**
-	 * Finds the most general unifier sigma of the set {t1 =. t1',...,tn =. tn'} so that
-	 * sigma(t1) = sigma(t1') , ... sigma(tn) = sigma(tn'). 
-	 * @param terms The set of terms to be unified
-	 * @return An optional of the most general unifier if it exists or an empty optional if there is no unifier.
-	 */
-	default public Optional<Unifier> unify(UnifyType... terms) {
-		return unify(Arrays.stream(terms).collect(Collectors.toSet()));
-	}
-
-}

src/main/java/de/dhbwstuttgart/typeinference/unify/interfaces/UnifyTypeVisitor.java

@@ -1,23 +0,0 @@
-package de.dhbwstuttgart.typeinference.unify.interfaces;
-
-import java.util.HashMap;
-
-import de.dhbwstuttgart.typeinference.unify.model.ExtendsType;
-import de.dhbwstuttgart.typeinference.unify.model.FunNType;
-import de.dhbwstuttgart.typeinference.unify.model.PlaceholderType;
-import de.dhbwstuttgart.typeinference.unify.model.ReferenceType;
-import de.dhbwstuttgart.typeinference.unify.model.SuperType;
-
-public interface UnifyTypeVisitor<T> {
-
-	public ReferenceType visit(ReferenceType refty, T ht);
-	
-	public PlaceholderType visit(PlaceholderType phty, T ht);
-	
-	public FunNType visit(FunNType funnty, T ht);
-	
-	public SuperType visit(SuperType suty, T ht);
-	
-	public ExtendsType visit(ExtendsType extty, T ht);
-
-}

src/main/java/de/dhbwstuttgart/typeinference/unify/model/ExtendsType.java

@@ -1,96 +0,0 @@
-package de.dhbwstuttgart.typeinference.unify.model;
-
-import java.util.ArrayList;
-import java.util.Collection;
-import java.util.HashMap;
-import java.util.Set;
-
-import de.dhbwstuttgart.typeinference.unify.interfaces.IFiniteClosure;
-import de.dhbwstuttgart.typeinference.unify.interfaces.UnifyTypeVisitor;
-
-/**
- * An extends wildcard type "? extends T". 
- */
-public final class ExtendsType extends WildcardType {
-	
-	public <T> UnifyType accept(UnifyTypeVisitor<T> visitor, T ht) {
-		return visitor.visit(this, ht);
-	}
-	
-	/**
-	 * Creates a new extends wildcard type.
-	 * @param extendedType The extended type e.g. Integer in "? extends Integer"
-	 */
-	public ExtendsType(UnifyType extendedType) {
-		super("? extends " + extendedType.getName(), extendedType);
-		if (extendedType instanceof ExtendsType) {
-			System.out.print("");
-		}
-	}
-
-	/**
-	 * The extended type e.g. Integer in "? extends Integer"
-	 */
-	public UnifyType getExtendedType() {
-		return wildcardedType;
-	}
-	
-	/**
-	 * Sets the type parameters of the wildcarded type and returns a new extendstype that extends that type.
-	 */
-	@Override
-	public UnifyType setTypeParams(TypeParams newTp) {
-		UnifyType newType = wildcardedType.setTypeParams(newTp);
-		if(newType == wildcardedType)
-			return this; // Reduced the amount of objects created
-		return new ExtendsType(wildcardedType.setTypeParams(newTp));
-	}
-
-	@Override
-	Set<UnifyType> smArg(IFiniteClosure fc, Set<UnifyType> fBounded) {
-		return fc.smArg(this, fBounded);
-	}
-
-	@Override
-	Set<UnifyType> grArg(IFiniteClosure fc, Set<UnifyType> fBounded) {
-		return fc.grArg(this, fBounded);
-	}
-
-	@Override
-	UnifyType apply(Unifier unif) {
-		UnifyType newType = wildcardedType.apply(unif);
-		if(newType.hashCode() == wildcardedType.hashCode() && newType.equals(wildcardedType))
-			return this; // Reduced the amount of objects created
-		return new ExtendsType(newType);
-	}
-	
-	@Override
-	public int hashCode() {
-		/*
-		 * It is important that the prime that is added is different to the prime added in hashCode() of SuperType.
-		 * Otherwise ? extends T and ? super T have the same hashCode() for every Type T.
-		 */
-		return wildcardedType.hashCode() + 229; 
-	}
-	
-	@Override
-	public boolean equals(Object obj) {
-		if(!(obj instanceof ExtendsType))
-			return false;
-		
-		if(obj.hashCode() != this.hashCode())
-			return false;
-	
-		ExtendsType other = (ExtendsType) obj;
-		
-	
-		return other.getWildcardedType().equals(wildcardedType);
-	}
-	
-	@Override
-	public String toString() {
-		return "? extends " + wildcardedType;
-	}
-
-	
-}

src/main/java/de/dhbwstuttgart/typeinference/unify/model/FiniteClosure.java

@@ -1,772 +0,0 @@
-package de.dhbwstuttgart.typeinference.unify.model;
-
-import java.io.FileWriter;
-import java.io.IOException;
-import java.io.Writer;
-import java.util.ArrayList;
-import java.util.Arrays;
-import java.util.HashMap;
-import java.util.HashSet;
-import java.util.Hashtable;
-import java.util.List;
-import java.util.Optional;
-import java.util.Set;
-import java.util.function.BiFunction;
-import java.util.function.BinaryOperator;
-import java.util.function.Predicate;
-import java.util.stream.Collectors;
-
-import com.google.common.collect.Ordering;
-
-//PL 18-02-05/18-04-05 Unifier durch Matcher ersetzt
-//muss greater noch ersetzt werden ja erledigt 18--04-05
-import de.dhbwstuttgart.typeinference.unify.MartelliMontanariUnify;
-
-import de.dhbwstuttgart.typeinference.unify.Match;
-import de.dhbwstuttgart.typeinference.unify.TypeUnifyTask;
-import de.dhbwstuttgart.typeinference.unify.interfaces.IFiniteClosure;
-import de.dhbwstuttgart.typeinference.unify.interfaces.IUnify;
-import de.dhbwstuttgart.util.Pair;
-
-/**
- * The finite closure for the type unification
- * @author Florian Steurer
- */
-public class FiniteClosure //extends Ordering<UnifyType> //entfernt PL 2018-12-11
-implements IFiniteClosure  {
-
-	Writer logFile;
-	static Boolean log = false;
-	public void setLogTrue() {
-		log = true;
-	}
-	/**
-	 * A map that maps every type to the node in the inheritance graph that contains that type.
-	 */
-	private HashMap<UnifyType, Node<UnifyType>> inheritanceGraph;
-	
-	/**
-	 * A map that maps every typename to the nodes of the inheritance graph that contain a type with that name.
-	 */
-	private HashMap<String, Set<Node<UnifyType>>> strInheritanceGraph;
-
-
-	/**
-	 * The initial pairs of that define the inheritance tree
-	 */
-	private Set<UnifyPair> pairs;
-	
-	/**
-	 * Hastable fuer die greater-Werte, damit sie nicht doppelt berechnet werden muessen
-	 */
-	Hashtable<hashKeyType, Set<UnifyType>> greaterHash = new Hashtable<>();
-	
-	/**
-	 * Hastable fuer die smaller-Werte, damit sie nicht doppelt berechnet werden muessen
-	 */
-	Hashtable<hashKeyType, Set<UnifyType>> smallerHash = new Hashtable<>();
-	
-	/**
-	 * Creates a new instance using the inheritance tree defined in the pairs.
-	 */
-	public FiniteClosure(Set<UnifyPair> pairs, Writer logFile) {
-		this.logFile = logFile;
-		this.pairs = new HashSet<>(pairs);
-		inheritanceGraph = new HashMap<UnifyType, Node<UnifyType>>();
-		
-		// Build the transitive closure of the inheritance tree
-		for(UnifyPair pair : pairs) {
-			
-			/*
-			try { 
-				logFile.write("Pair: " + pair + "\n");
-				logFile.flush();
-			}
-			catch (IOException e) {
-				System.err.println("no LogFile");
-			}
-			*/
-			
-			if(pair.getPairOp() != PairOperator.SMALLER)
-				continue;
-			
-			//VERSUCH PL 18-02-06
-			//koennte ggf. die FC reduzieren
-			//TO DO: Ueberpruefen, ob das sinnvll und korrekt ist 
-			//if (!pair.getLhsType().getTypeParams().arePlaceholders() 
-			//		&& !pair.getRhsType().getTypeParams().arePlaceholders())
-			//	continue;
-;			
-			// Add nodes if not already in the graph
-			if(!inheritanceGraph.containsKey(pair.getLhsType()))
-				inheritanceGraph.put(pair.getLhsType(), new Node<UnifyType>(pair.getLhsType()));
-			if(!inheritanceGraph.containsKey(pair.getRhsType()))
-				inheritanceGraph.put(pair.getRhsType(), new Node<UnifyType>(pair.getRhsType()));
-			
-			Node<UnifyType> childNode = inheritanceGraph.get(pair.getLhsType());
-			Node<UnifyType> parentNode = inheritanceGraph.get(pair.getRhsType());
-		
-			// Add edge
-			parentNode.addDescendant(childNode);
-			
-			// Add edges to build the transitive closure
-			parentNode.getPredecessors().stream().forEach(x -> x.addDescendant(childNode));
-			childNode.getDescendants().stream().forEach(x -> x.addPredecessor(parentNode));
-			
-			//PL eingefuegt 2020-05-07 File UnitTest InheritTest.java
-			this.inheritanceGraph.forEach((x,y) -> { if (y.getDescendants().contains(parentNode)) { y.addDescendant(childNode); y.addAllDescendant(childNode.getDescendants());};
-													 if (y.getPredecessors().contains(childNode)) { y.addPredecessor(parentNode); y.addAllPredecessor(parentNode.getPredecessors());};} );
-		}
-
-		// Build the alternative representation with strings as keys
-		strInheritanceGraph = new HashMap<>();
-		for(UnifyType key : inheritanceGraph.keySet()) {
-			if(!strInheritanceGraph.containsKey(key.getName()))
-				strInheritanceGraph.put(key.getName(), new HashSet<>());
-			
-			strInheritanceGraph.get(key.getName()).add(inheritanceGraph.get(key));
-		}
-	}
-	
-	void testSmaller() {
-		UnifyType tq1, tq2, tq3;
-		tq1 = new ExtendsType(PlaceholderType.freshPlaceholder());
-		List<UnifyType> l1 = new ArrayList<>();
-		List<UnifyType> l2 = new ArrayList<>();
-		l1.add(tq1);
-		tq2 = new ReferenceType("java.util.Vector", new TypeParams(l1));
-		l2.add(tq2);
-		tq3 = new ReferenceType("java.util.Vector", new TypeParams(l2));
-		Set<UnifyType> smaller = smaller(tq3, new HashSet<>()); 
-	}
-
-	/**
-	 * Returns all types of the finite closure that are subtypes of the argument.
-	 * @return The set of subtypes of the argument.
-	 */
-	@Override
-	public Set<UnifyType> smaller(UnifyType type, Set<UnifyType> fBounded) {
-		
-		Set<UnifyType> ret;
-		if ((ret = smallerHash.get(new hashKeyType(type))) != null) {
-			//System.out.println(greaterHash);
-			return new HashSet<>(ret);
-		}
-		
-		if(type instanceof FunNType)
-			return computeSmallerFunN((FunNType) type, fBounded);
-		
-		Set<Pair<UnifyType,Set<UnifyType>>> ts = new HashSet<>();
-		ts.add(new Pair<>(type, fBounded));
-		Set<UnifyType> result = computeSmaller(ts);
-		smallerHash.put(new hashKeyType(type), result);
-		/*
-		try { 
-			logFile.write("\ntype: " + type + "\nret: " + ret + "\nresult: " + result);//"smallerHash: " + greaterHash.toString());
-			logFile.flush();
-		}
-		catch (IOException e) {
-			System.err.println("no LogFile");
-		}*/
-		return result;
-	}
-	
-	/**
-	 * Computes the smaller functions for every type except FunNTypes.
-	 */
-	private Set<UnifyType> computeSmaller(Set<Pair<UnifyType,Set<UnifyType>>> types) {
-		Set<Pair<UnifyType,Set<UnifyType>>> result = new HashSet<>();
-		
-		//PL 18-02-05 Unifier durch Matcher ersetzt
-		//IUnify unify = new MartelliMontanariUnify();
-		Match match = new Match();
-		
-		for(Pair<UnifyType,Set<UnifyType>> pt : types) {
-			UnifyType t = pt.getKey();
-			Set<UnifyType> fBounded = pt.getValue().get();
-			
-			// if T = T' then T <* T'
-			try {
-				result.add(new Pair<>(t, fBounded));
-			}
-			catch (StackOverflowError e) {
-				System.out.println("");
-			}
-			
-			// if C<...> <* C<...> then ... (third case in definition of <*)
-			if(t.getTypeParams().size() > 0) {
-				ArrayList<Set<UnifyType>> paramCandidates = new ArrayList<>();
-				for (int i = 0; i < t.getTypeParams().size(); i++)
-					paramCandidates.add(smArg(t.getTypeParams().get(i), fBounded));
-				permuteParams(paramCandidates).forEach(x -> result.add(new Pair<>(t.setTypeParams(x), fBounded)));
-			}
-			
-			if(!strInheritanceGraph.containsKey(t.getName()))
-				continue;
-			
-			// if T <* T' then sigma(T) <* sigma(T')
-			Set<Node<UnifyType>> candidates = strInheritanceGraph.get(t.getName()); //cadidates= [???Node(java.util.Vector<java.util.Vector<java.lang.Integer>>)???
-			                                                                       // , Node(java.util.Vector<gen_hv>)
-			                                                                         //]
-			for(Node<UnifyType> candidate :  candidates) {
-				UnifyType theta2 = candidate.getContent();
-				//PL 18-02-05 Unifier durch Matcher ersetzt ANFANG
-				ArrayList<UnifyPair> termList= new ArrayList<UnifyPair>();
-				termList.add(new UnifyPair(theta2,t, PairOperator.EQUALSDOT));
-				Optional<Unifier> optSigma = match.match(termList);
-				//PL 18-02-05 Unifier durch Matcher ersetzt ENDE
-				if(!optSigma.isPresent())
-					continue;
-				
-				Unifier sigma = optSigma.get();
-				sigma.swapPlaceholderSubstitutions(t.getTypeParams());
-				
-				Set<UnifyType> theta1Set = candidate.getContentOfDescendants();
-				
-				for(UnifyType theta1 : theta1Set)
-					result.add(new Pair<>(theta1.apply(sigma), fBounded));
-			}
-		}
-		
-		HashSet<UnifyType> resut = result.stream().map(x -> x.getKey()).collect(Collectors.toCollection(HashSet::new));
-		if(resut.equals(types.stream().map(x -> x.getKey()).collect(Collectors.toCollection(HashSet::new))))
-			return resut;
-		return computeSmaller(result);
-	}
-	
-	/**
-	 * Computes the smaller-Function for FunNTypes.
-	 */
-	private Set<UnifyType> computeSmallerFunN(FunNType type, Set<UnifyType> fBounded) {
-		Set<UnifyType> result = new HashSet<>();
-		
-		// if T = T' then T <=* T'
-	    result.add(type); 
-	    
-	    // Because real function types are implicitly variant
-	    // it is enough to permute the params with the values of greater / smaller.
-		ArrayList<Set<UnifyType>> paramCandidates = new ArrayList<>();
-		paramCandidates.add(smaller(type.getTypeParams().get(0), fBounded));
-		for (int i = 1; i < type.getTypeParams().size(); i++)
-			paramCandidates.add(greater(type.getTypeParams().get(i), new HashSet<>()));
-	
-		permuteParams(paramCandidates).forEach(x -> result.add(type.setTypeParams(x)));
-		return result;
-	}
-	
-	/**
-	 * Returns all types of the finite closure that are supertypes of the argument.
-	 * @return The set of supertypes of the argument.
-	 */
-	@Override
-	//Eingefuegt PL 2018-05-24 F-Bounded Problematik
-	public Set<UnifyType> greater(UnifyType type, Set<UnifyType> fBounded) {
-		
-		Set<UnifyType> ret;
-		if ((ret = greaterHash.get(new hashKeyType(type))) != null) {
-			//System.out.println(greaterHash);
-			return new HashSet<>(ret);
-		}
-	
-		
-		if(type instanceof FunNType) {
-			return computeGreaterFunN((FunNType) type, fBounded); 
-		}
-		
-		Set<UnifyType> result = new HashSet<>();
-		Set<Pair<UnifyType,Set<UnifyType>>> PairResultFBounded = new HashSet<>();
-		
-		Match match = new Match();
-		
-		
-		// if T = T' then T <=* T'
-		result.add(type);
-		if(!strInheritanceGraph.containsKey(type.getName()))
-			return result;
-		
-		// if T <* T' then sigma(T) <* sigma(T')
-		Set<Node<UnifyType>> candidates = strInheritanceGraph.get(type.getName());
-		
-		/*
-		try { 
-			if (log) logFile.write(candidates.toString());
-			//log = false;
-		}
-		catch (IOException e) {
-			System.err.println("no LogFile");
-		}
-		*/
-		
-		for(Node<UnifyType> candidate :  candidates) {
-			UnifyType theta1 = candidate.getContent();
-			
-			//PL 18-04-05 Unifier durch Matcher ersetzt ANFANG
-			ArrayList<UnifyPair> termList= new ArrayList<UnifyPair>();
-			termList.add(new UnifyPair(theta1,type, PairOperator.EQUALSDOT));
-			Optional<Unifier> optSigma = match.match(termList);
-			//PL 18-04-05 Unifier durch Matcher ersetzt ENDE
-			if(!optSigma.isPresent()) {
-				continue;
-			}
-			Unifier sigma = optSigma.get();
-			sigma.swapPlaceholderSubstitutionsReverse(theta1.getTypeParams());
-			
-			Set<UnifyType> fBoundedNew = new HashSet<>(fBounded);
-			fBoundedNew.add(theta1);
-			Set<UnifyType> theta2Set = candidate.getContentOfPredecessors();
-			//System.out.println("");
-			for(UnifyType theta2 : theta2Set) {
-				result.add(theta2.apply(sigma));
-				PairResultFBounded.add(new Pair<>(theta2.apply(sigma), fBoundedNew));
-			}
-		}
-		/*
-		try { 
-			if (log) logFile.write(PairResultFBounded.toString());
-			log = false;
-		}
-		catch (IOException e) {
-			System.err.println("no LogFile");
-		}
-		*/
-		for(Pair<UnifyType,Set<UnifyType>> pt : PairResultFBounded) {
-			UnifyType t = pt.getKey();
-			Set<UnifyType> lfBounded = pt.getValue().get();
-			
-			// if C<...> <* C<...> then ... (third case in definition of <*)	
-			//TypeParams typeparams = t.getTypeParams();
-			if(t.getTypeParams().size() > 0) {
-				ArrayList<Set<UnifyType>> paramCandidates = new ArrayList<>();
-				
-				for (int i = 0; i < t.getTypeParams().size(); i++) {
-					//UnifyType parai = t.getTypeParams().get(i);
-					int i_ef = i;
-					BiFunction<Boolean,UnifyType,Boolean> f = (x,y) -> 
-					{
-						ArrayList<UnifyPair> termList = new ArrayList<UnifyPair>();
-					    termList.add(new UnifyPair(y,t.getTypeParams().get(i_ef), PairOperator.EQUALSDOT));
-					    return ((match.match(termList).isPresent()) || x);
-					};
-					//if (parai.getName().equals("java.lang.Integer")) {
-					//	System.out.println("");
-					//}
-					BinaryOperator<Boolean> bo = (a,b) -> (a || b);
-					if (lfBounded.stream().reduce(false,f,bo)) {
-						//F-Bounded Endlosrekursion
-						HashSet<UnifyType> res = new HashSet<UnifyType>();
-						paramCandidates.add(res); 
-					}
-					else {
-						paramCandidates.add(grArg(t.getTypeParams().get(i), new HashSet<>(fBounded) ));
-					}
-				}
-				permuteParams(paramCandidates).forEach(x -> result.add(t.setTypeParams(x)));
-				//System.out.println("");
-			}
-		}
-		
-		greaterHash.put(new hashKeyType(type), result);
-		/*
-		try { 
-			logFile.write("\ntype: " + type + "\nret: " + ret + "\nresult: " + result);//"greaterHash: " + greaterHash.toString());
-			logFile.flush();
-		}
-		catch (IOException e) {
-			System.err.println("no LogFile");
-		}*/
-		return result;
-	}
-	
-	/* auskommentiert PL 2018-05-24
-	/**
-	 * Returns all types of the finite closure that are supertypes of the argument.
-	 * @return The set of supertypes of the argument.
-	 *
-	//@Override
-	public Set<UnifyType> oldgreater(UnifyType type, Set<UnifyType> fBounded) {
-		if(type instanceof FunNType)
-			return computeGreaterFunN((FunNType) type, fBounded); 
-		
-		Set<Pair<UnifyType,Set<UnifyType>>> ts = new HashSet<>();
-		ts.add(new Pair<>(type, fBounded));
-		return computeGreater(ts);
-	}
- 
-	/**
-	 * Computes the greater function for all types except function types.
-	 *
-	protected Set<UnifyType> computeGreater(Set<Pair<UnifyType,Set<UnifyType>>> types) {
-		Set<Pair<UnifyType,Set<UnifyType>>> result = new HashSet<>();
-		
-		//PL 18-04-05 Unifier durch Matcher ersetzt
-		//IUnify unify = new MartelliMontanariUnify();
-		Match match = new Match();
-		
-		for(Pair<UnifyType,Set<UnifyType>> pt : types) {
-			UnifyType t = pt.getKey();
-			Set<UnifyType> fBounded = pt.getValue().get();
-			// if T = T' then T <=* T'
-			result.add(pt);
-			
-			// if C<...> <* C<...> then ... (third case in definition of <*)			
-			if(t.getTypeParams().size() > 0) {
-				ArrayList<Set<UnifyType>> paramCandidates = new ArrayList<>();
-				for (int i = 0; i < t.getTypeParams().size(); i++) {
-					UnifyType parai = t.getTypeParams().get(i);
-					int i_ef = i;
-					BiFunction<Boolean,UnifyType,Boolean> f = (x,y) -> 
-					{
-						ArrayList<UnifyPair> termList = new ArrayList<UnifyPair>();
-					    termList.add(new UnifyPair(y,t.getTypeParams().get(i_ef), PairOperator.EQUALSDOT));
-					    return ((match.match(termList).isPresent()) || x);
-					};
-					if (parai.getName().equals("java.lang.Integer")) {
-						System.out.println("");
-					}
-					BinaryOperator<Boolean> bo = (a,b) -> (a || b);
-					if (fBounded.stream().reduce(false,f,bo)) continue; //F-Bounded Endlosrekursion
-					paramCandidates.add(grArg(t.getTypeParams().get(i), new HashSet<>(fBounded) ));
-				}
-				permuteParams(paramCandidates).forEach(x -> result.add(new Pair<>(t.setTypeParams(x), new HashSet<>(fBounded))));
-			}
-			
-			if(!strInheritanceGraph.containsKey(t.getName()))
-				continue;
-			
-			// if T <* T' then sigma(T) <* sigma(T')
-			Set<Node<UnifyType>> candidates = strInheritanceGraph.get(t.getName());
-			for(Node<UnifyType> candidate :  candidates) {
-				UnifyType theta1 = candidate.getContent();
-				
-				//PL 18-04-05 Unifier durch Matcher ersetzt ANFANG
-				ArrayList<UnifyPair> termList= new ArrayList<UnifyPair>();
-				termList.add(new UnifyPair(theta1,t, PairOperator.EQUALSDOT));
-				Optional<Unifier> optSigma = match.match(termList);
-				//PL 18-04-05 Unifier durch Matcher ersetzt ENDE
-				if(!optSigma.isPresent())
-					continue;
-				
-				Unifier sigma = optSigma.get();
-				sigma.swapPlaceholderSubstitutionsReverse(theta1.getTypeParams());
-				
-				Set<UnifyType> fBoundedNew = new HashSet<>(fBounded);
-				fBoundedNew.add(theta1);
-				Set<UnifyType> theta2Set = candidate.getContentOfPredecessors();
-				
-				for(UnifyType theta2 : theta2Set)
-					result.add(new Pair<>(theta2.apply(sigma), fBoundedNew));
-			}
-			
-		}
-		
-		HashSet<UnifyType> resut = result.stream().map(x -> x.getKey()).collect(Collectors.toCollection(HashSet::new));
-		System.out.println(resut);
-		if(resut.equals(types.stream().map(x -> x.getKey()).collect(Collectors.toCollection(HashSet::new))))
-			return resut;
-		return computeGreater(result);
-	}
-	*/
-
-	/**
-	 * Computes the greater function for FunN-Types
-	 */
-	protected Set<UnifyType> computeGreaterFunN(FunNType type, Set<UnifyType> fBounded) {
-		Set<UnifyType> result = new HashSet<>();
-		
-		// if T = T' then T <=* T'
-	    result.add(type); 
-	    
-	    // Because real function types are implicitly variant
-	    // it is enough to permute the params with the values of greater / smaller.
-		ArrayList<Set<UnifyType>> paramCandidates = new ArrayList<>();
-		paramCandidates.add(greater(type.getTypeParams().get(0), new HashSet<>()));
-		for (int i = 1; i < type.getTypeParams().size(); i++)
-				paramCandidates.add(smaller(type.getTypeParams().get(i), fBounded));
-		permuteParams(paramCandidates).forEach(x -> result.add(type.setTypeParams(x)));
-		return result;
-	}
-
-	
-	@Override	
-	public Set<UnifyType> grArg(UnifyType type, Set<UnifyType> fBounded) {
-		return type.grArg(this, fBounded);
-	}
-
-	@Override
-	public Set<UnifyType> grArg(ReferenceType type, Set<UnifyType> fBounded) {
-		Set<UnifyType> result = new HashSet<UnifyType>();
-		result.add(type);	
-        smaller(type, fBounded).forEach(x -> result.add(new SuperType(x)));
-        greater(type,fBounded).forEach(x -> result.add(new ExtendsType(x)));
-		return result;
-	}
-	
-	@Override
-	public Set<UnifyType> grArg(FunNType type, Set<UnifyType> fBounded) {
-		Set<UnifyType> result = new HashSet<UnifyType>();
-		result.add(type);	
-        smaller(type, fBounded).forEach(x -> result.add(new SuperType(x)));
-        greater(type, fBounded).forEach(x -> result.add(new ExtendsType(x)));
-		return result;
-	}
-	
-	@Override
-	public Set<UnifyType> grArg(ExtendsType type, Set<UnifyType> fBounded) {
-		Set<UnifyType> result = new HashSet<UnifyType>();
-		result.add(type);
-		UnifyType t = type.getExtendedType();
-		greater(t, fBounded).forEach(x -> result.add(new ExtendsType(x)));
-		return result;
-	}
-
-	@Override
-	public Set<UnifyType> grArg(SuperType type, Set<UnifyType> fBounded) {
-		Set<UnifyType> result = new HashSet<UnifyType>();
-		result.add(type);
-		UnifyType t = type.getSuperedType();
-		smaller(t, fBounded).forEach(x -> result.add(new SuperType(x)));
-		return result;
-	}
-	
-	@Override
-	public Set<UnifyType> grArg(PlaceholderType type, Set<UnifyType> fBounded) {
-		HashSet<UnifyType> result = new HashSet<>();
-		result.add(type);
-		return result;
-	}
-
-	@Override	
-	public Set<UnifyType> smArg(UnifyType type, Set<UnifyType> fBounded) {
-		return type.smArg(this, fBounded);
-	}
-	
-	@Override
-	public Set<UnifyType> smArg(ReferenceType type, Set<UnifyType> fBounded) {
-		Set<UnifyType> result = new HashSet<UnifyType>();
-		result.add(type);	
-		return result;
-	}
-	
-	@Override
-	public Set<UnifyType> smArg(FunNType type, Set<UnifyType> fBounded) {
-		Set<UnifyType> result = new HashSet<UnifyType>();
-		result.add(type);	
-		return result;
-	}
-	
-	@Override
-	public Set<UnifyType> smArg(ExtendsType type, Set<UnifyType> fBounded) {
-		Set<UnifyType> result = new HashSet<UnifyType>();
-		result.add(type);
-		UnifyType t = type.getExtendedType();
-		result.add(t);	
-        smaller(t, fBounded).forEach(x -> { 
-        	result.add(new ExtendsType(x));
-        	result.add(x); 
-        });
-		return result;
-	}
-	
-
-	@Override
-	public Set<UnifyType> smArg(SuperType type, Set<UnifyType> fBounded) {
-		Set<UnifyType> result = new HashSet<UnifyType>();
-		result.add(type);
-		UnifyType t = type.getSuperedType();
-		result.add(t);	
-//*** ACHTUNG das koennte FALSCH sein PL 2018-05-23 evtl. HashSet durch smArg durchschleifen	
-        greater(t, fBounded).forEach(x -> { 
-        	result.add(new SuperType(x));
-        	result.add(x); 
-        });
-		return result;
-	}
-	
-	@Override
-	public Set<UnifyType> smArg(PlaceholderType type, Set<UnifyType> fBounded) {
-		HashSet<UnifyType> result = new HashSet<>();
-		result.add(type);
-		return result;
-	}
-	
-	@Override
-	public Set<UnifyType> getAllTypesByName(String typeName) {
-		if(!strInheritanceGraph.containsKey(typeName))
-			return new HashSet<>();
-		return strInheritanceGraph.get(typeName).stream().map(x -> x.getContent()).collect(Collectors.toCollection(HashSet::new));
-	}
-	
-	@Override
-	public Optional<UnifyType> getLeftHandedType(String typeName) {
-		if(!strInheritanceGraph.containsKey(typeName))
-			return Optional.empty();
-		
-		for(UnifyPair pair : pairs)
-			if(pair.getLhsType().getName().equals(typeName) && pair.getLhsType().typeParams.arePlaceholders())
-					return Optional.of(pair.getLhsType());
-		
-		return Optional.empty();
-	}
-	
-	@Override
-	public Set<UnifyType> getAncestors(UnifyType t) {
-		if(!inheritanceGraph.containsKey(t))
-			return new HashSet<>();
-		Set<UnifyType> result = inheritanceGraph.get(t).getContentOfPredecessors();
-		result.add(t);
-		return result;
-	}
-	
-	@Override
-	public Set<UnifyType> getChildren(UnifyType t) {
-		if(!inheritanceGraph.containsKey(t))
-			return new HashSet<>();
-		Set<UnifyType> result = inheritanceGraph.get(t).getContentOfDescendants();
-		result.add(t);
-		return result;
-	}
-	
-	/**
-	 * Takes a set of candidates for each position and computes all possible permutations.
-	 * @param candidates The length of the list determines the number of type params. Each set
-	 * contains the candidates for the corresponding position.
-	 */
-	protected Set<TypeParams> permuteParams(ArrayList<Set<UnifyType>> candidates) {
-		Set<TypeParams> result = new HashSet<>();
-		permuteParams(candidates, 0, result, new UnifyType[candidates.size()]);
-		return result;
-	}
-	
-	/**
-	 * Takes a set of candidates for each position and computes all possible permutations.
-	 * @param candidates The length of the list determines the number of type params. Each set
-	 * contains the candidates for the corresponding position.
-	 * @param idx Idx for the current permutatiton.
-	 * @param result Set of all permutations found so far
-	 * @param current The permutation of type params that is currently explored
-	 */
-	protected void permuteParams(ArrayList<Set<UnifyType>> candidates, int idx, Set<TypeParams> result, UnifyType[] current) {
-		if(candidates.size() == idx) {
-			result.add(new TypeParams(Arrays.copyOf(current, current.length)));
-			return;
-		}
-		
-		Set<UnifyType> localCandidates = candidates.get(idx);
-		
-		for(UnifyType t : localCandidates) {
-			current[idx] = t;
-			permuteParams(candidates, idx+1, result, current);
-		}
-	}
-	
-	@Override
-	public String toString(){
-		return this.inheritanceGraph.toString();
-	}
-	
-	/* entfernt PL 2018-12-11
-	public int compare (UnifyType left, UnifyType right) {
-		return compare(left, right, PairOperator.SMALLERDOT);
-	}
-	*/
-	
-	public int compare (UnifyType left, UnifyType right, PairOperator pairop) {
-		//try {logFile.write("left: "+ left + " right: " + right + " pairop: " + pairop);} catch (IOException ie) {}
-		if (left.getName().equals("Matrix") || right.getName().equals("Matrix")) 
-			System.out.println("");
-		/*
-		pairop = PairOperator.SMALLERDOTWC;
-		List<UnifyType> al = new ArrayList<>();
-		PlaceholderType xx =new PlaceholderType("xx");
-		al.add(xx);
-		left = new ExtendsType(new ReferenceType("Vector", new TypeParams(al)));
-		
-		List<UnifyType> alr = new ArrayList<>();
-		UnifyType exx = new ExtendsType(xx);
-		alr.add(exx);
-		right = new ExtendsType(new ReferenceType("Vector", new TypeParams(alr)));
-		*/
-		/*
-		List<UnifyType> al = new ArrayList<>();
-		PlaceholderType xx =new PlaceholderType("xx");
-		al.add(xx);
-		left = new ExtendsType(xx);
-		right = xx;
-		*/
-		/*
-		List<UnifyType> al = new ArrayList<>();
-		PlaceholderType xx =new PlaceholderType("xx");
-		PlaceholderType yy =new PlaceholderType("yy");
-		al.add(xx);
-		left = yy;
-		right = new ExtendsType(xx);
-		*/
-		//Die Faelle abfangen, bei den Variablen verglichen werden PL 2018-12-11
-		UnifyType ex;
-		if (left instanceof PlaceholderType) { 
-				if ((right instanceof WildcardType) 
-						&& ((ex = ((WildcardType)right).wildcardedType) instanceof PlaceholderType)
-						&& ((PlaceholderType)left).getName().equals(((PlaceholderType)ex).getName())) {// a <.? ? extends a oder a <.? ? super a
-					return -1;
-				}
-				else {
-					return 0;
-				}
-		}
-		if (right instanceof PlaceholderType) {//&& (left instanceof WildcardType)) {PL geloescht 2019-01-15 analog zu oben
-			if ((left instanceof WildcardType) //PL eingefuegt 2019-01-15 analog zu oben
-					&& ((ex = ((WildcardType)left).wildcardedType) instanceof PlaceholderType)
-					&& ((PlaceholderType)right).getName().equals(((PlaceholderType)ex).getName())) {// ? extends a <. a oder ? super a <. a
-				return 1;
-			}
-			else {
-				return 0;
-			}
-		}
-		UnifyPair up = new UnifyPair(left, right, pairop);
-		TypeUnifyTask unifyTask = new TypeUnifyTask();
-		HashSet<UnifyPair> hs = new HashSet<>();
-		hs.add(up);
-		Set<UnifyPair> smallerRes = unifyTask.applyTypeUnificationRules(hs, this);
-		/*
-		//if (left.getName().equals("Matrix") || right.getName().equals("Matrix")) 
-		{try { 
-			logFile.write("\nsmallerRes: " + smallerRes);//"smallerHash: " + greaterHash.toString());
-			logFile.flush();
-		}
-		catch (IOException e) {
-			System.err.println("no LogFile");}}
-		*/
-		//Gleichungen der Form a <./=. Theta oder Theta <./=. a oder a <./=. b sind ok.
-		Predicate<UnifyPair> delFun = x -> !((x.getLhsType() instanceof PlaceholderType || 
-											 x.getRhsType() instanceof PlaceholderType)
-								 			 && !((x.getLhsType() instanceof WildcardType) &&   //? extends/super a <.? a 
-													 ((WildcardType)x.getLhsType()).getWildcardedType().equals(x.getRhsType()))
-											 );
-		long smallerLen = smallerRes.stream().filter(delFun).count();
-		if (smallerLen == 0) return -1;
-		else {
-			up = new UnifyPair(right, left, pairop);
-			//TypeUnifyTask unifyTask = new TypeUnifyTask();
-			hs = new HashSet<>();
-			hs.add(up);
-			Set<UnifyPair> greaterRes = unifyTask.applyTypeUnificationRules(hs, this);
-			/*
-			//if (left.getName().equals("Matrix") || right.getName().equals("Matrix")) 
-			{try { 
-				logFile.write("\ngreaterRes: " + greaterRes);//"smallerHash: " + greaterHash.toString());
-				logFile.flush();
-			}
-			catch (IOException e) {
-				System.err.println("no LogFile");}}
-			*/
-			//Gleichungen der Form a <./=. Theta oder Theta <./=. a oder a <./=. b sind ok. 
-			long greaterLen = greaterRes.stream().filter(delFun).count();
-			if (greaterLen == 0) return 1;
-			else  {
-				//try {logFile.write("0 left: "+ left + " right: " + right + " pairop: " + pairop);} catch (IOException ie) {}
-				return 0;
-			}
-		}	
-	}
-}

src/main/java/de/dhbwstuttgart/typeinference/unify/model/FunNType.java

@@ -1,103 +0,0 @@
-package de.dhbwstuttgart.typeinference.unify.model;
-
-import java.util.ArrayList;
-import java.util.Arrays;
-import java.util.HashMap;
-import java.util.Set;
-
-import de.dhbwstuttgart.typeinference.unify.interfaces.IFiniteClosure;
-import de.dhbwstuttgart.typeinference.unify.interfaces.UnifyTypeVisitor;
-
-/**
- * A real function type in java.
- * @author Florian Steurer
- */
-public class FunNType extends UnifyType {
-
-	public <T> UnifyType accept(UnifyTypeVisitor<T> visitor, T ht) {
-		return visitor.visit(this, ht);
-	}
-	
-	/**
-	 * Creates a FunN-Type with the specified TypeParameters.
-	 */
-	protected FunNType(TypeParams p) {
-		super("Fun"+(p.size()-1)+"$$", p);
-	}
-
-	/**
-	 * Creates a new FunNType.
-	 * @param tp The parameters of the type.
-	 * @return A FunNType.
-	 * @throws IllegalArgumentException is thrown when there are to few type parameters or there are wildcard-types.
-	 */
-	public static FunNType getFunNType(TypeParams tp) throws IllegalArgumentException {
-		if(tp.size() == 0)
-			throw new IllegalArgumentException("FunNTypes need at least one type parameter");
-		for(UnifyType t : tp)
-			if(t instanceof WildcardType)
-				throw new IllegalArgumentException("Invalid TypeParams for a FunNType: " + tp);
-		return new FunNType(tp);
-	}
-	
-	/**
-	 * Returns the degree of the function type, e.g. 2 for FunN<Integer, Integer, Integer>.
-	 */
-	public int getN() {
-		return typeParams.size()-1;
-	}
-	
-	@Override
-	public UnifyType setTypeParams(TypeParams newTp) {
-		if(newTp.hashCode() == typeParams.hashCode() && newTp.equals(typeParams))
-			return this;
-		return getFunNType(newTp);
-	}
-	
-	@Override
-	Set<UnifyType> smArg(IFiniteClosure fc, Set<UnifyType> fBounded) {
-		return fc.smArg(this, fBounded);
-	}
-
-	@Override
-	Set<UnifyType> grArg(IFiniteClosure fc, Set<UnifyType> fBounded) {
-		return fc.grArg(this, fBounded);
-	}
-	
-	@Override
-	UnifyType apply(Unifier unif) {
-		// TODO this bypasses the validation of the type parameters.
-		// Wildcard types can be unified into FunNTypes.
-		TypeParams newParams = typeParams.apply(unif);
-		if(newParams.hashCode() == typeParams.hashCode() && newParams.equals(typeParams))
-			return this;
-		
-		return new FunNType(newParams);
-	}
-
-	@Override
-	public Boolean wrongWildcard() {
-		return (new ArrayList<UnifyType>(Arrays.asList(getTypeParams()
-				.get())).stream().filter(x -> (x instanceof WildcardType)).findFirst().isPresent());
-	}
-	
-	@Override
-	public int hashCode() {
-		return 181 + typeParams.hashCode();
-	}
-	
-	
-	@Override
-	public boolean equals(Object obj) {
-		if(!(obj instanceof FunNType))
-			return false;
-		
-		if(obj.hashCode() != this.hashCode())
-			return false;
-		
-		FunNType other = (FunNType) obj;
-
-		return other.getTypeParams().equals(typeParams);
-	}
-	
-}

src/main/java/de/dhbwstuttgart/typeinference/unify/model/Node.java

@@ -1,118 +0,0 @@
-package de.dhbwstuttgart.typeinference.unify.model;
-
-import java.util.HashSet;
-import java.util.Set;
-import java.util.stream.Collectors;
-
-/**
- * A node of a directed graph.
- * @author Florian Steurer
- *
- * @param <T> The type of the content of the node.
- */
-class Node<T> {
-	
-	/**
-	 * The content of the node.
-	 */
-	private T content;
-	
-	/**
-	 * The set of predecessors
-	 */
-	private HashSet<Node<T>> predecessors = new HashSet<>();
-	
-	/**
-	 * The set of descendants
-	 */
-	private HashSet<Node<T>> descendants = new HashSet<>();
-	
-	/**
-	 * Creates a node containing the specified content.
-	 */
-	public Node(T content) {
-		this.content = content;
-	}
-	
-	/**
-	 * Adds a directed edge from this node to the descendant (this -> descendant)
-	 */
-	public void addDescendant(Node<T> descendant) {
-		if(descendants.contains(descendant))
-			return;
-		
-		descendants.add(descendant);
-		descendant.addPredecessor(this);
-	}
-	
-	/**
-	 * Adds some directed edges from this node to the descendant (this -> descendant)
-	 */
-	public void addAllDescendant(Set<Node<T>> allDescendants) {
-		for(Node<T> descendant: allDescendants) {
-			addDescendant(descendant);
-		}
-	}
-	
-	/**
-	 * Adds a directed edge from the predecessor to this node (predecessor -> this)
-	 */
-	public void addPredecessor(Node<T> predecessor) {
-		if(predecessors.contains(predecessor))
-			return;
-		
-		predecessors.add(predecessor);
-		predecessor.addDescendant(this);
-	}
-	
-	/**
-	 * Adds some directed edges from the predecessor to this node (predecessor -> this)
-	 */
-	public void addAllPredecessor(Set<Node<T>> allPredecessors) {
-		for(Node<T> predecessor: allPredecessors) {
-			addPredecessor(predecessor);
-		}
-	}
-	
-	/**
-	 * The content of this node.
-	 */
-	public T getContent() {
-		return content;
-	}
-	
-	/**
-	 * Returns all predecessors (nodes that have a directed edge to this node)
-	 */
-	public Set<Node<T>> getPredecessors() {
-		return predecessors;
-	}
-	
-	/**
-	 * Returns all descendants. All nodes M, where there is a edge from this node to the node M.
-	 * @return
-	 */
-	public Set<Node<T>> getDescendants() {
-		return descendants;
-	}
-	
-	/**
-	 * Retrieves the content of all descendants.
-	 */
-	public Set<T> getContentOfDescendants() {
-		return descendants.stream().map(x -> x.getContent()).collect(Collectors.toSet());
-	}
-	
-	/**
-	 * Retrieves the content of all predecessors.
-	 */
-	public Set<T> getContentOfPredecessors() {
-		return predecessors.stream().map(x -> x.getContent()).collect(Collectors.toSet());
-	}
-	
-	@Override
-	public String toString() {
-		return "Elem: Node(" + content.toString() + ")\nPrec: " + getContentOfPredecessors().toString() 
-				+ "\nDesc: " + getContentOfDescendants().toString() + "\n\n";
-	}
-}

src/main/java/de/dhbwstuttgart/typeinference/unify/model/OrderingExtend.java

@@ -1,89 +0,0 @@
-package de.dhbwstuttgart.typeinference.unify.model;
-
-import java.util.ArrayList;
-import java.util.HashSet;
-import java.util.Iterator;
-import java.util.List;
-import java.util.Set;
-
-public abstract class OrderingExtend<T> extends com.google.common.collect.Ordering<T> {
-
-	public List<T> maxElements(Iterable<T> iterable) {
-		ArrayList<T> ret = new ArrayList<>();
-		while (iterable.iterator().hasNext()) {
-			Set<T> believe = new HashSet<>(); 
-		
-			T max = max(iterable);
-			ret.add(max);
-		
-			Iterator<T> it = iterable.iterator();
-			while (it.hasNext()) {
-				T elem = it.next();
-				if (!(compare(max, elem) == 1) && !max.equals(elem)) {
-					believe.add(elem);
-				}
-			}
-			iterable = believe;
-		}
-		return ret;
-	}
-	
-	public List<T> minElements(Iterable<T> iterable) {
-		ArrayList<T> ret = new ArrayList<>();
-		while (iterable.iterator().hasNext()) {
-			Set<T> believe = new HashSet<>(); 
-		
-			T min = min(iterable);
-			ret.add(min);
-		
-			Iterator<T> it = iterable.iterator();
-			while (it.hasNext()) {
-				T elem = it.next();
-				if (!(compare(min, elem) == -1) && !min.equals(elem)) {
-					believe.add(elem);
-				}
-			}
-			iterable = believe;
-		}
-		return ret;
-	}
-	
-	
-	public List<T> smallerEqThan(T elem, Iterable<T> iterable) {
-		List<T> ret = smallerThan(elem, iterable);
-		ret.add(elem);
-		return ret;
-		
-	}
-	
-	public List<T> smallerThan(T elem, Iterable<T> iterable) {
-		ArrayList<T> ret = new ArrayList<>();
-		Iterator<T> it = iterable.iterator();
-		while (it.hasNext()) {
-			T itElem = it.next();
-				if (!itElem.equals(elem) && compare(elem, itElem) == 1) {
-					ret.add(itElem);
-				}
-			}
-		return ret;
-	}
-	
-	public List<T> greaterEqThan(T elem, Iterable<T> iterable) {
-		List<T> ret = greaterThan(elem, iterable);
-		ret.add(elem);
-		return ret;
-		
-	}
-	
-	public List<T> greaterThan(T elem, Iterable<T> iterable) {
-		ArrayList<T> ret = new ArrayList<>();
-		Iterator<T> it = iterable.iterator();
-		while (it.hasNext()) {
-			T itElem = it.next();
-				if (!itElem.equals(elem) && (compare(elem, itElem) == -1)) {
-					ret.add(itElem);
-				}
-			}
-		return ret;
-	}
-}

src/main/java/de/dhbwstuttgart/typeinference/unify/model/OrderingUnifyPair.java

@@ -1,457 +0,0 @@
-package de.dhbwstuttgart.typeinference.unify.model;
-
-import java.io.IOException;
-import java.util.ArrayList;
-import java.util.HashMap;
-import java.util.HashSet;
-import java.util.Iterator;
-import java.util.LinkedList;
-import java.util.List;
-import java.util.Optional;
-import java.util.Set;
-import java.util.function.BinaryOperator;
-import java.util.function.Function;
-import java.util.stream.Collectors;
-import java.util.stream.Stream;
-
-import com.google.common.collect.Ordering;
-
-import de.dhbwstuttgart.typeinference.unify.Match;
-import de.dhbwstuttgart.typeinference.unify.TypeUnifyTask;
-import de.dhbwstuttgart.typeinference.unify.interfaces.IFiniteClosure;
-import de.dhbwstuttgart.util.Pair;
-
-
-
-public class OrderingUnifyPair extends OrderingExtend<Set<UnifyPair>> {
-	
-	protected IFiniteClosure fc;
-	
-	public OrderingUnifyPair(IFiniteClosure fc) {
-		this.fc = fc;
-	}
-	
-	/*
-	 * vergleicht Paare (a =. Theta) und (a =. Theta')
-	 * in dem compare(Theta, Theta') aufgerufen wird.
-	 */
-	public int compareEq (UnifyPair left, UnifyPair right) {
-		try {
-		//if (left.getRhsType() instanceof WildcardType || right.getRhsType() instanceof WildcardType) {//PL 2019-01-12 ausgetauscht
-		if (((PlaceholderType)left.getLhsType()).isInnerType() && ((PlaceholderType)right.getLhsType()).isInnerType()) {
-			return fc.compare(left.getRhsType(), right.getRhsType(), PairOperator.SMALLERDOTWC);
-		}
-			else	 {
-				return fc.compare(left.getRhsType(), right.getRhsType(), PairOperator.SMALLERDOT);
-		}}
-		catch (ClassCastException e) {
-			try {
-			((FiniteClosure)fc).logFile.write("ClassCastException: " + left.toString() + " " + left.getGroundBasePair() + "\n\n");
-			((FiniteClosure)fc).logFile.flush();
-			}
-			catch (IOException ie) {
-			}
-			return -99;
-		}
-	}
-	
-	/*
-	public int compareEq (UnifyPair left, UnifyPair right) {
-		if (left == null || right == null)
-			System.out.println("Fehler");
-		if (left.getLhsType() instanceof PlaceholderType) {
-			return fc.compare(left.getRhsType(), right.getRhsType(), left.getPairOp());
-		}
-		else {
-			return fc.compare(left.getLhsType(), right.getLhsType(), left.getPairOp());
-		}
-	}
-	*/
-	
-	public Pair<Integer,Set<UnifyPair>> compare (UnifyType left, UnifyType right) {
-		UnifyPair up;
-		if (left instanceof WildcardType || right instanceof WildcardType) {
-			up = new UnifyPair(left, right, PairOperator.SMALLERDOTWC);
-			if (((left instanceof ExtendsType) 
-					&& (((ExtendsType)left).getExtendedType().getName().equals("java.util.Vector"))
-					&& (((ReferenceType)((ExtendsType)left).getExtendedType()).getTypeParams().iterator().next() instanceof ExtendsType)) ||
-				((right instanceof ExtendsType) 
-						&& (((ExtendsType)right).getExtendedType().getName().equals("java.util.Vector"))
-						&& (((ReferenceType)((ExtendsType)right).getExtendedType()).getTypeParams().iterator().next() instanceof ExtendsType)))
-				{
-					System.out.println("");
-				}
-				if (((right instanceof SuperType) && (((SuperType)right).getSuperedType().getName().equals("java.lang.Object")))
-		||((left instanceof SuperType) && (((SuperType)left).getSuperedType().getName().equals("java.lang.Object"))))
-{
-						System.out.println("");
-					}
-		}
-			else	 {
-				up = new UnifyPair(left, right, PairOperator.SMALLERDOT);
-		}
-		TypeUnifyTask unifyTask = new TypeUnifyTask();
-		HashSet<UnifyPair> hs = new HashSet<>();
-		hs.add(up);
-		Set<UnifyPair> smallerRes = unifyTask.applyTypeUnificationRules(hs, fc);
-		long smallerLen = smallerRes.stream().filter(x -> !(x.getLhsType() instanceof PlaceholderType && x.getRhsType() instanceof PlaceholderType)).count();
-		if (smallerLen == 0) return new Pair<>(-1, smallerRes);
-		else {
-			if (left instanceof WildcardType || right instanceof WildcardType) {
-				up = new UnifyPair(right, left, PairOperator.SMALLERDOTWC);
-				if (((left instanceof ExtendsType) 
-					&& (((ExtendsType)left).getExtendedType().getName().equals("java.util.Vector"))
-					&& (((ReferenceType)((ExtendsType)left).getExtendedType()).getTypeParams().iterator().next() instanceof ExtendsType)) ||
-				((right instanceof ExtendsType) 
-						&& (((ExtendsType)right).getExtendedType().getName().equals("java.util.Vector"))
-						&& (((ReferenceType)((ExtendsType)right).getExtendedType()).getTypeParams().iterator().next() instanceof ExtendsType)))
-				{
-					System.out.println("");
-				}
-				if (right instanceof SuperType) 
-					{
-						System.out.println("");
-					}
-			}
-				else	 {
-					up = new UnifyPair(right, left, PairOperator.SMALLERDOT);
-			}
-			//TypeUnifyTask unifyTask = new TypeUnifyTask();
-			hs = new HashSet<>();
-			hs.add(up);
-			Set<UnifyPair> greaterRes = unifyTask.applyTypeUnificationRules(hs, fc);
-			long greaterLen = greaterRes.stream().filter(x -> !(x.getLhsType() instanceof PlaceholderType && x.getRhsType() instanceof PlaceholderType)).count();
-			if (greaterLen == 0) return new Pair<>(1, greaterRes);
-			else return new Pair<>(0, new HashSet<>());
-		}	
-	}
-	
-	/* TODO muss noch verifiziert werden PL 2018-03-21
-	 * (non-Javadoc)
-	 * fuehrt zu Fehlern bei Arrays.sort (contract nicht erfuellt)
-	 * @see com.google.common.collect.Ordering#compare(java.lang.Object, java.lang.Object)
-	 */
-	public int compare (Set<UnifyPair> leftpara, Set<UnifyPair> rightpara) {
-		
-		Set<UnifyPair> left = new HashSet<>(leftpara);
-		Set<UnifyPair> right = new HashSet<>(rightpara);
-		
-		/*
-		//pairop = PairOperator.SMALLERDOTWC;
-		List<UnifyType> al = new ArrayList<>();
-		PlaceholderType xx = PlaceholderType.freshPlaceholder();
-		al.add(xx);
-		UnifyType t1 = new ExtendsType(new ReferenceType("Vector", new TypeParams(al)));
-		
-		//PlaceholderType yy =new PlaceholderType("yy");
-		List<UnifyType> alr = new ArrayList<>();
-		UnifyType exx = new ExtendsType(xx);
-		alr.add(exx);
-		UnifyType t2 = new ExtendsType(new ReferenceType("Vector", new TypeParams(alr)));
-		
-		PlaceholderType a = PlaceholderType.freshPlaceholder();
-		a.setInnerType(true);
-		UnifyPair p1 = new UnifyPair(a, t1, PairOperator.SMALLERDOTWC); 
-		PlaceholderType b = PlaceholderType.freshPlaceholder();
-		b.setInnerType(true);
-		UnifyPair p2 = new UnifyPair(b, t2, PairOperator.SMALLERDOTWC);
-		
-		List<UnifyType> al3 = new ArrayList<>();
-		al3.add(a);
-		
-		List<UnifyType> al4 = new ArrayList<>();
-		al4.add(b);
-		
-		UnifyPair p3 = new UnifyPair(new PlaceholderType("c"), new ReferenceType("Vector", new TypeParams(al3)), PairOperator.EQUALSDOT);
-		UnifyPair p4 = new UnifyPair(new PlaceholderType("c"), new ReferenceType("Vector", new TypeParams(al4)), PairOperator.EQUALSDOT);
-		
-		right = new HashSet<>();
-		right.add(p1);
-		right.add(p3);
-		left = new HashSet<>();
-		left.add(p2);
-		left.add(p4);
-		*/
-		
-
-		Set<UnifyPair> lefteq = left.stream()
-				.filter(x -> (x.getLhsType() instanceof PlaceholderType && x.getPairOp() == PairOperator.EQUALSDOT))
-				.collect(Collectors.toCollection(HashSet::new));
-		Set<UnifyPair> righteq = right.stream()
-				.filter(x -> (x.getLhsType() instanceof PlaceholderType && x.getPairOp() == PairOperator.EQUALSDOT))
-				.collect(Collectors.toCollection(HashSet::new));
-		Set<UnifyPair> leftle = left.stream()
-				.filter(x -> ((x.getLhsType() instanceof PlaceholderType || x.getRhsType() instanceof PlaceholderType) 
-						      && x.getPairOp() == PairOperator.SMALLERDOT))
-				.collect(Collectors.toCollection(HashSet::new));
-		Set<UnifyPair> rightle = right.stream()
-				.filter(x -> ((x.getLhsType() instanceof PlaceholderType || x.getRhsType() instanceof PlaceholderType) 
-						      && x.getPairOp() == PairOperator.SMALLERDOT))
-				.collect(Collectors.toCollection(HashSet::new));
-		Set<UnifyPair> leftlewc = left.stream()
-				.filter(x -> ((x.getLhsType() instanceof PlaceholderType || x.getRhsType() instanceof PlaceholderType) 
-						      && x.getPairOp() == PairOperator.SMALLERDOTWC))
-				.collect(Collectors.toCollection(HashSet::new));
-		Set<UnifyPair> rightlewc = right.stream()
-				.filter(x -> ((x.getLhsType() instanceof PlaceholderType || x.getRhsType() instanceof PlaceholderType) 
-						      && x.getPairOp() == PairOperator.SMALLERDOTWC))
-				.collect(Collectors.toCollection(HashSet::new));
-		//System.out.println(left.toString());
-		//Fall 2
-		//if (lefteq.iterator().next().getLhsType().getName().equals("AJO")) {
-		//	System.out.print("");
-		//}
-		
-		//ODER-CONSTRAINT
-		Set<UnifyPair> leftBase = left.stream().map(x -> x.getGroundBasePair()).collect(Collectors.toCollection(HashSet::new));
-		Set<UnifyPair> rightBase = right.stream().map(x -> x.getGroundBasePair()).collect(Collectors.toCollection(HashSet::new));
-
-		Set<UnifyPair> lefteqOder = left.stream()
-				.filter(x -> { UnifyPair y = x.getGroundBasePair();
-				/*try {
-					((FiniteClosure)fc).logFile.write("leftBase: " + leftBase.toString() +"\n");
-					((FiniteClosure)fc).logFile.write("rightBase: " + rightBase.toString() +"\n\n");
-					((FiniteClosure)fc).logFile.write("left: " + left.toString() +"\n");
-					((FiniteClosure)fc).logFile.write("right: " + right.toString() +"\n\n");
-					((FiniteClosure)fc).logFile.write("y: " + y.toString() +"\n");
-					((FiniteClosure)fc).logFile.write("y.getLhsType() : " + y.getLhsType() .toString() +"\n\n");
-					((FiniteClosure)fc).logFile.write("y.getRhsType(): " + y.getRhsType().toString() +"\n");
-					((FiniteClosure)fc).logFile.write("x.getPairOp(): " + x.getPairOp().toString() +"\n\n");
-					}
-					catch (IOException ie) {
-					}	*/
-	               return (y.getLhsType() instanceof PlaceholderType && 
-	            		   !(y.getRhsType() instanceof PlaceholderType) && 
-	            		   x.getPairOp() == PairOperator.EQUALSDOT);})
-				.collect(Collectors.toCollection(HashSet::new));
-		left.removeAll(lefteqOder);
-		Set<UnifyPair> righteqOder = right.stream()
-				.filter(x -> { UnifyPair y = x.getGroundBasePair(); 
-	               return (y.getLhsType() instanceof PlaceholderType && 
-	            		   !(y.getRhsType() instanceof PlaceholderType) && 
-	            		   x.getPairOp() == PairOperator.EQUALSDOT);})
-				.collect(Collectors.toCollection(HashSet::new));
-		right.removeAll(righteqOder);
-		Set<UnifyPair> lefteqRet = left.stream()
-				.filter(x -> { UnifyPair y = x.getGroundBasePair(); 
-	               return (y.getRhsType() instanceof PlaceholderType && 
-	            		   ((PlaceholderType)y.getRhsType()).getOrCons() == (byte)-1);})
-				.collect(Collectors.toCollection(HashSet::new));
-		left.removeAll(lefteqRet);
-		Set<UnifyPair> righteqRet = right.stream()
-				.filter(x -> { UnifyPair y = x.getGroundBasePair(); 
-	               return (y.getRhsType() instanceof PlaceholderType && 
-	            		   ((PlaceholderType)y.getRhsType()).getOrCons() == (byte)-1);})
-				.collect(Collectors.toCollection(HashSet::new));
-		right.removeAll(righteqRet);
-		Set<UnifyPair> leftleOder = left.stream()
-				.filter(x -> (x.getPairOp() == PairOperator.SMALLERDOT))
-				.collect(Collectors.toCollection(HashSet::new));
-		Set<UnifyPair> rightleOder = right.stream()
-				.filter(x -> (x.getPairOp() == PairOperator.SMALLERDOT))
-				.collect(Collectors.toCollection(HashSet::new));
-		
-		/*
-		synchronized(this) {
-					try {
-			((FiniteClosure)fc).logFile.write("leftBase: " + leftBase.toString() +"\n");
-			((FiniteClosure)fc).logFile.write("rightBase: " + rightBase.toString() +"\n\n");
-			((FiniteClosure)fc).logFile.write("left: " + left.toString() +"\n");
-			((FiniteClosure)fc).logFile.write("right: " + right.toString() +"\n\n");
-			((FiniteClosure)fc).logFile.write("lefteqOder: " + lefteqOder.toString() +"\n");
-			((FiniteClosure)fc).logFile.write("righteqOder: " + righteqOder.toString() +"\n\n");
-			((FiniteClosure)fc).logFile.write("lefteqRet: " + lefteqRet.toString() +"\n");
-			((FiniteClosure)fc).logFile.write("righteqRet: " + righteqRet.toString() +"\n\n");
-			((FiniteClosure)fc).logFile.write("leftleOder: " + leftleOder.toString() +"\n");
-			((FiniteClosure)fc).logFile.write("rightleOder: " + rightleOder.toString() +"\n\n");
-			((FiniteClosure)fc).logFile.flush();
-			}
-			catch (IOException ie) {
-			}
-		}
-		*/
-		
-		
-		Integer compareEq;
-		if (lefteqOder.size() == 1 && righteqOder.size() == 1 && lefteqRet.size() == 1 && righteqRet.size() == 1) {
-			Match m = new Match();
-			if ((compareEq = compareEq(lefteqOder.iterator().next().getGroundBasePair(), righteqOder.iterator().next().getGroundBasePair())) == -1) {
-				ArrayList<UnifyPair> matchList = 
-						rightleOder.stream().map(x -> { 
-							UnifyPair leftElem = leftleOder.stream()
-														     .filter(y -> y.getGroundBasePair().getLhsType().equals(x.getGroundBasePair().getLhsType()))
-														     .findAny().get(); 
-							return new UnifyPair(x.getRhsType(), leftElem.getRhsType(), PairOperator.EQUALSDOT);})
-											.collect(Collectors.toCollection(ArrayList::new));
-				if (m.match(matchList).isPresent()) {
-					//try { ((FiniteClosure)fc).logFile.write("result1: -1 \n\n"); } catch (IOException ie) {}
-					return -1;
-				}
-				else {
-					//try { ((FiniteClosure)fc).logFile.write("result1: 0 \n\n"); } catch (IOException ie) {}
-					return 0;
-				}
-			} else if (compareEq == 1) {
-				ArrayList<UnifyPair> matchList = 
-						leftleOder.stream().map(x -> { 
-							UnifyPair rightElem = rightleOder.stream()
-									                        .filter(y -> 
-									                        	y.getGroundBasePair().getLhsType().equals(x.getGroundBasePair().getLhsType()))
-									                        .findAny().get(); 
-														return new UnifyPair(x.getRhsType(), rightElem.getRhsType(), PairOperator.EQUALSDOT);})
-											.collect(Collectors.toCollection(ArrayList::new));
-				if (m.match(matchList).isPresent()) {
-					//try { ((FiniteClosure)fc).logFile.write("result2: 1 \n\n"); } catch (IOException ie) {}
-					return 1;
-				}
-				else {
-					//try { ((FiniteClosure)fc).logFile.write("result2: 0 \n\n"); } catch (IOException ie) {}
-					return 0;
-				}
-			} else {
-				/*
-				synchronized(this) {
-					try {
-						((FiniteClosure)fc).logFile.write("leftBase: " + leftBase.toString() +"\n");
-						((FiniteClosure)fc).logFile.write("rightBase: " + rightBase.toString() +"\n\n");
-						((FiniteClosure)fc).logFile.write("left: " + left.toString() +"\n");
-						((FiniteClosure)fc).logFile.write("right: " + right.toString() +"\n\n");
-						((FiniteClosure)fc).logFile.write("lefteqOder: " + lefteqOder.toString() +"\n");
-						((FiniteClosure)fc).logFile.write("righteqOder: " + righteqOder.toString() +"\n\n");
-						((FiniteClosure)fc).logFile.write("lefteqRet: " + lefteqRet.toString() +"\n");
-						((FiniteClosure)fc).logFile.write("righteqRet: " + righteqRet.toString() +"\n\n");
-						((FiniteClosure)fc).logFile.write("leftleOder: " + leftleOder.toString() +"\n");
-						((FiniteClosure)fc).logFile.write("rightleOder: " + rightleOder.toString() +"\n\n");
-						((FiniteClosure)fc).logFile.write("result3: 0 \n\n");
-						((FiniteClosure)fc).logFile.flush();
-					}
-					catch (IOException ie) {
-					}
-				}
-				*/
-				return 0;
-			}
-		}
-		
-		
-		if (lefteq.size() == 1 && lefteq.iterator().next().getRhsType() instanceof ExtendsType && leftle.size() == 1  && righteq.size() == 0 && rightle.size() == 1) {
-			return 1;
-		}
-		//Fall 2
-		if (lefteq.size() == 0 && leftle.size() == 1 && righteq.size() == 1 && righteq.iterator().next().getRhsType() instanceof ExtendsType && rightle.size() == 1) {
-			return -1;
-		}
-		//Fall 3
-		if (lefteq.size() == 1 && lefteq.iterator().next().getRhsType() instanceof SuperType && leftle.size() == 1  && righteq.size() == 0 && rightle.size() == 1) {
-			return -1;
-		}
-		//Fall 3
-		if (lefteq.size() == 0 && leftle.size() == 1 && righteq.size() == 1 && righteq.iterator().next().getRhsType() instanceof SuperType && rightle.size() == 1) {
-			return 1;
-		}
-		//Fall 5
-		if (lefteq.size() == 1 && leftle.size() == 0 && righteq.size() == 1 && rightle.size() == 1) {
-			return -1;
-		}
-		//Fall 5
-		if (lefteq.size() == 1 && leftle.size() == 1 && righteq.size() == 1 && rightle.size() == 0) {
-			return 1;
-		}
-		//Fall 5
-		if (lefteq.size() == 1 && leftle.size() == 1 && righteq.size() == 1 && rightle.size() == 1) {
-			return 0;
-		}
-		// Nur Paare a =. Theta
-		if (leftle.size() == 0 && rightle.size() == 0 && leftlewc.size() == 0 && rightlewc.size() ==0) {
-			Stream<UnifyPair> lseq = lefteq.stream(); //left.filter(x -> (x.getLhsType() instanceof PlaceholderType && x.getPairOp() == PairOperator.EQUALSDOT));
-			Stream<UnifyPair> rseq = righteq.stream(); //right.filter(x -> (x.getLhsType() instanceof PlaceholderType && x.getPairOp() == PairOperator.EQUALSDOT));
-			BinaryOperator<HashMap<UnifyType,UnifyPair>> combiner = (x,y) -> { x.putAll(y); return x;};
-			HashMap<UnifyType,UnifyPair> hm = rseq.reduce(new HashMap<UnifyType,UnifyPair>(), (x, y)-> { x.put(y.getLhsType(),y); return x; }, combiner);
-			lseq = lseq.filter(x -> !(hm.get(x.getLhsType()) == null));//NOCHMALS UEBERPRUEFEN!!!!
-			lseq = lseq.filter(x -> !x.equals(hm.get(x.getLhsType()))); //Elemente die gleich sind muessen nicht verglichen werden
-			Optional<Integer> si = lseq.map(x -> compareEq(x, hm.get(x.getLhsType()))).reduce((x,y)-> { if (x == y) return x; else return 0; } );
-			if (!si.isPresent()) return 0;
-			else return si.get();
-		}
-		//Fall 1 und 4
-		if (lefteq.size() >= 1 && righteq.size() >= 1 && (leftlewc.size() > 0 || rightlewc.size() > 0)) {
-			if (lefteq.iterator().next().getLhsType().getName().equals("D")) 
-				System.out.print("");
-			//Set<PlaceholderType> varsleft = lefteq.stream().map(x -> (PlaceholderType)x.getLhsType()).collect(Collectors.toCollection(HashSet::new));
-			//Set<PlaceholderType> varsright = righteq.stream().map(x -> (PlaceholderType)x.getLhsType()).collect(Collectors.toCollection(HashSet::new));
-			//filtern des Paares a = Theta, das durch a <. Thata' generiert wurde (nur im Fall 1 relevant)  andere Substitutioen werden rausgefiltert
-			lefteq.removeIf(x -> (x.getBasePair()!=null) && !(x.getLhsType().getName().equals(x.getBasePair().getLhsType().getName())
-					              ||x.getLhsType().getName().equals(x.getBasePair().getRhsType().getName())));//removeIf(x -> !varsright.contains(x.getLhsType()));
-			righteq.removeIf(x -> (x.getBasePair()!=null) && !(x.getLhsType().getName().equals(x.getBasePair().getLhsType().getName())
-		              	           ||x.getLhsType().getName().equals(x.getBasePair().getRhsType().getName())));//.removeIf(x -> !varsleft.contains(x.getLhsType()));
-			UnifyPair lseq = lefteq.iterator().next();
-			UnifyPair rseq = righteq.iterator().next();
-			if (lseq.getRhsType().getName().equals("Object")) {
-				if (rseq.getRhsType().getName().equals("Object")) return 0;
-				else return 1;
-			}
-			else {
-				if (rseq.getRhsType().getName().equals("Object")) return -1;
-			}
-			if (leftlewc.size() == rightlewc.size()) {
-				//TODO: Hier wird bei Wildcards nicht das richtige compare aufgerufen PL 18-04-20
-				Pair<Integer, Set<UnifyPair>> int_Unifier = compare(lseq.getRhsType(), rseq.getRhsType());
-				Unifier uni = new Unifier();
-				int_Unifier.getValue().get().forEach(x -> uni.add((PlaceholderType) x.getLhsType(), x.getRhsType()));
-				if (!lseq.getRhsType().getName().equals(rseq.getRhsType().getName()) 
-					|| leftlewc.size() == 0 || rightlewc.size() == 0) return int_Unifier.getKey();
-				else {
-					Set <UnifyPair> lsleuni = leftlewc.stream().map(x -> uni.apply(x)).collect(Collectors.toCollection(HashSet::new));
-					Set <UnifyPair> rsleuni = rightlewc.stream().map(x -> uni.apply(x)).collect(Collectors.toCollection(HashSet::new));
-					BinaryOperator<HashMap<UnifyType,UnifyPair>> combiner = (x,y) -> { x.putAll(y); return x;};
-				
-					HashMap<UnifyType,UnifyPair> hm;
-					Optional<Integer> si;
-					//1. Fall
-					if (leftlewc.iterator().next().getLhsType() instanceof PlaceholderType) {
-						hm = rsleuni.stream().reduce(new HashMap<UnifyType,UnifyPair>(), (x, y)-> { x.put(y.getLhsType(),y); return x; }, combiner);
-						Stream<UnifyPair> lslewcstr = lsleuni.stream().filter(x -> !(hm.get(x.getLhsType()) == null));
-						si = lslewcstr.map(x -> fc.compare(x.getRhsType(), hm.get(x.getLhsType()).getRhsType(), PairOperator.SMALLERDOTWC)).reduce((x,y)-> { if (x == y) return x; else return 0; } );
-					}
-					//4. Fall
-					else {
-						hm = rsleuni.stream().reduce(new HashMap<UnifyType,UnifyPair>(), (x, y)-> { x.put(y.getRhsType(),y); return x; }, combiner);
-						Stream<UnifyPair> lslewcstr = lsleuni.stream().filter(x -> !(hm.get(x.getRhsType()) == null));
-						si = lslewcstr.map(x -> fc.compare(x.getLhsType(), hm.get(x.getRhsType()).getLhsType(), PairOperator.SMALLERDOTWC)).reduce((x,y)-> { if (x == y) return x; else return 0; } );
-					}
-					if (!si.isPresent()) return 0;
-					else return si.get();
-				}
-			} else {
-				if (leftlewc.size() > 0) {
-					Set<UnifyPair> subst;
-					subst = leftlewc.stream().map(x -> { 
-						if (x.getLhsType() instanceof PlaceholderType) {
-							return new UnifyPair(x.getLhsType(), x.getRhsType(), PairOperator.EQUALSDOT);
-						}
-						else {
-							return new UnifyPair(x.getRhsType(), x.getLhsType(), PairOperator.EQUALSDOT);
-						}}).collect(Collectors.toCollection(HashSet::new));
-					Unifier uni = new Unifier();
-					lseq = uni.apply(lseq);
-				}
-				else {
-					Set<UnifyPair> subst;
-					subst = rightlewc.stream().map(x -> { 
-						if (x.getLhsType() instanceof PlaceholderType) {
-							return new UnifyPair(x.getLhsType(), x.getRhsType(), PairOperator.EQUALSDOT);
-						}
-						else {
-							return new UnifyPair(x.getRhsType(), x.getLhsType(), PairOperator.EQUALSDOT);
-						}}).collect(Collectors.toCollection(HashSet::new));
-					Unifier uni = new Unifier();
-					subst.stream().forEach(x -> uni.add((PlaceholderType) x.getLhsType(), x.getRhsType()));
-					rseq = uni.apply(rseq);
-				}
-				return compareEq(lseq, rseq);
-			}
-		}
-		return 0;	
-	}		
-}
-

src/main/java/de/dhbwstuttgart/typeinference/unify/model/PairOperator.java

@@ -1,49 +0,0 @@
-package de.dhbwstuttgart.typeinference.unify.model;
-
-/**
- * Operators of pairs of the unification.
- * @author Florian Steurer
- */
-public enum PairOperator {
-	/**
-	 * The smaller operator (T < P) is used to express a subtyping relation between
-	 * T and P for example in the finite closure. It is necessarily true.
-	 */
-	SMALLER,
-	
-	/**
-	 * The smallerdot operator (T <. P) is used to express a subtyping relation between
-	 * of T and P in a CONSTRAINT during the unification. It is not necessarily true. 
-	 */
-	SMALLERDOT,
-	
-	/**
-	 * The smallernedot operator for arguments (T <!=. P) is the same as SMALLERDOT without
-	 * T == P. It is used for operations + / - / * / < / > / ... with the Supertype Number
-	 */
-	SMALLERNEQDOT,
-	
-	/**
-	 * The smallerdot operator for arguments (T <.? P) is used to express that 
-	 * T is an element of smArg(P) (or P is an element of grArg(T)) in a CONSTRAINT 
-	 * during the unification. It is not necessarily true.
-	 */
-	SMALLERDOTWC,
-	
-	/**
-	 * The equalsdot operator (T =. P) is used to express that two types during the unification
-	 * should be equal. It is not necessarily true.
-	 */
-	EQUALSDOT;
-	
-	@Override
-	public String toString() {
-		switch (this) {
-			case SMALLER: return "<";
-			case SMALLERDOT: return "<.";
-			case SMALLERNEQDOT: return "<!=.";
-			case SMALLERDOTWC: return "<.?";
-			default: return "=."; // EQUALSDOT
-		}
-	}
-}

src/main/java/de/dhbwstuttgart/typeinference/unify/model/PlaceholderType.java

@@ -1,208 +0,0 @@
-package de.dhbwstuttgart.typeinference.unify.model;
-
-import java.util.ArrayList;
-import java.util.Collection;
-import java.util.Random;
-import java.util.Set;
-import java.util.concurrent.ConcurrentHashMap;
-
-import de.dhbwstuttgart.typeinference.unify.distributeVariance;
-import de.dhbwstuttgart.typeinference.unify.interfaces.IFiniteClosure;
-import de.dhbwstuttgart.typeinference.unify.interfaces.UnifyTypeVisitor;
-
-/**
- * An unbounded placeholder type.
- * @author Florian Steurer
- */
-public final class PlaceholderType extends UnifyType{
-	
-	/**
-	 * Static list containing the names of all existing placeholders.
-	 * Used for generating fresh placeholders.
-	 */
-	public static final Set<String> EXISTING_PLACEHOLDERS = ConcurrentHashMap.newKeySet();
-	
-	/**
-	 * Prefix of auto-generated placeholder names.
-	 */
-	protected static String nextName = "gen_";
-	
-	/**
-	 * Random number generator used to generate fresh placeholder name.
-	 */
-	protected static Random rnd = new Random(43558747548978L);
-	
-	/**
-	 * True if this object was auto-generated, false if this object was user-generated.
-	 */
-	private final boolean IsGenerated;
-	
-	
-	/**
-	 * isWildcardable gibt an, ob ein Wildcardtyp dem PlaceholderType zugeordnet werden darf 
-	 */
-	private boolean wildcardable = true;  
-	
-	/**
-	 * is innerType gibt an, ob der Type des PlaceholderType innerhalb eines Typkonstruktorsverwendet wird
-	 */
-	private boolean innerType = false;  
-	
-	/**
-     * variance shows the variance of the pair
-     * -1: contravariant
-     * 1 covariant
-     * 0 invariant
-     * PL 2018-03-21
-     */
-    private int variance = 0;
-    
-    /*
-     * Fuer Oder-Constraints:
-     * orCons = 1: Receiver
-     * orCons = 0: Argument oder kein Oder-Constraint 
-     * orCons = -1: RetType
-     */
-    private byte orCons = 0;
-	
-	/**
-	 * Creates a new placeholder type with the specified name.
-	 */
-	public PlaceholderType(String name) {
-		super(name, new TypeParams());
-		EXISTING_PLACEHOLDERS.add(name); // Add to list of existing placeholder names
-		IsGenerated = false; // This type is user generated
-	}
-	
-	/**
-	 * Creates a new placeholdertype 
-	 * @param isGenerated true if this placeholder is auto-generated, false if it is user-generated.
-	 */
-	protected PlaceholderType(String name, boolean isGenerated) {
-		super(name, new TypeParams());
-		EXISTING_PLACEHOLDERS.add(name); // Add to list of existing placeholder names
-		IsGenerated = isGenerated;
-	}
-	
-	public <T> UnifyType accept(UnifyTypeVisitor<T> visitor, T ht) {
-		return visitor.visit(this, ht);
-	}
-	
-	/**
-	 * Creates a fresh placeholder type with a name that does so far not exist.
-	 * A user could later instantiate a type using the same name that is equivalent to this type.
-	 * @return A fresh placeholder type.
-	 */
-	public static PlaceholderType freshPlaceholder() {
-		String name = nextName + (char) (rnd.nextInt(22) + 97); // Returns random char between 'a' and 'z'
-		// Add random chars while the name is in use.
-		while(EXISTING_PLACEHOLDERS.contains(name)) {
-			name += (char) (rnd.nextInt(22) + 97); // Returns random char between 'a' and 'z'
-		}
-		return new PlaceholderType(name, true);
-	}
-	
-	
-	/**
-	 * True if this placeholder is auto-generated, false if it is user-generated.
-	 */
-	public boolean isGenerated() {
-		return IsGenerated;
-	}
-
-	public void setVariance(int v) {
-		variance = v;
-	}
-	
-	public int getVariance() {
-		return variance;
-	}
-	
-	public void reversVariance() {
-		if (variance == 1) {
-			setVariance(-1);
-		} else {
-	    if (variance == -1) {
-			setVariance(1);
-		}}
-	}
-	
-	public void setOrCons(byte i) {
-		orCons = i;
-	}
-	
-	public byte getOrCons() {
-		return orCons;
-	}
-	
-	public Boolean isWildcardable() {
-		return wildcardable;
-	}
-	public void disableWildcardtable() {
-		wildcardable = false;
-	}
-	
-	public void enableWildcardtable() {
-		wildcardable = true;
-	}
-	
-	public void setWildcardtable(Boolean wildcardable) {
-		this.wildcardable = wildcardable;
-	}
-	
-	public Boolean isInnerType() {
-		return innerType;
-	}
-	
-	public void setInnerType(Boolean innerType) {
-		this.innerType = innerType;
-	}
-	
-	@Override
-	Set<UnifyType> smArg(IFiniteClosure fc, Set<UnifyType> fBounded) {
-		return fc.smArg(this, fBounded);
-	}
-
-	@Override
-	Set<UnifyType> grArg(IFiniteClosure fc, Set<UnifyType> fBounded) {
-		return fc.grArg(this, fBounded);
-	}
-	
-	@Override
-	public UnifyType setTypeParams(TypeParams newTp) {
-		return this; // Placeholders never have params.
-	}
-	
-	@Override
-	public int hashCode() {
-		return typeName.hashCode();
-	}
-	
-	@Override
-	UnifyType apply(Unifier unif) {
-		if(unif.hasSubstitute(this)) {
-			UnifyType ret = unif.getSubstitute(this);
-			//PL 2018-05-17 Auskommentierung muesste korrekt sein,
-			//bereits in JavaTXComplier Variancen gesetzt werden.
-			//ret.accept(new distributeVariance(), this.getVariance());
-			return ret;
-		}
-		return this;
-	}
-	
-	@Override
-	public boolean equals(Object obj) {
-		if(!(obj instanceof PlaceholderType))
-			return false;
-		
-		return ((PlaceholderType) obj).getName().equals(typeName);
-	}
-	
-
-	@Override
-	public Collection<PlaceholderType> getInvolvedPlaceholderTypes() {
-		ArrayList<PlaceholderType> ret = new ArrayList<>();
-		ret.add(this);
-		return ret;
-	}
-}

src/main/java/de/dhbwstuttgart/typeinference/unify/model/ReferenceType.java

@@ -1,100 +0,0 @@
-package de.dhbwstuttgart.typeinference.unify.model;
-
-import java.util.HashMap;
-import java.util.Set;
-
-import de.dhbwstuttgart.typeinference.unify.interfaces.IFiniteClosure;
-import de.dhbwstuttgart.typeinference.unify.interfaces.UnifyTypeVisitor;
-
-/**
- * A reference type e.q. Integer or List<T>.
- * @author Florian Steurer
- *
- */
-public class ReferenceType extends UnifyType {
-	
-	/**
-	 * The buffered hashCode
-	 */
-	private final int hashCode;
-	
-	/**
-	 * gibt an, ob der ReferenceType eine generische Typvariable ist
-	 */
-	private final boolean genericTypeVar;
-	
-
-	public <T> UnifyType accept(UnifyTypeVisitor<T> visitor, T ht) {
-		return visitor.visit(this, ht);
-	}
-	
-	public ReferenceType(String name, Boolean genericTypeVar) {
-		super(name, new TypeParams());
-		hashCode = 31 + 17 * typeName.hashCode() + 17 * typeParams.hashCode();
-		this.genericTypeVar = genericTypeVar;
-	}
-	
-	public ReferenceType(String name, UnifyType... params) {
-		super(name, new TypeParams(params));
-		hashCode = 31 + 17 * typeName.hashCode() + 17 * typeParams.hashCode();
-		genericTypeVar = false;
-	}
-	
-	public ReferenceType(String name, TypeParams params) {
-		super(name, params);
-		hashCode = 31 + 17 * typeName.hashCode() + 17 * typeParams.hashCode();
-		genericTypeVar = false;
-	}
-
-	public boolean isGenTypeVar () { 
-		return genericTypeVar;
-	}
-	
-	@Override
-	Set<UnifyType> smArg(IFiniteClosure fc, Set<UnifyType> fBounded) {
-		return fc.smArg(this, fBounded);
-	}
-
-	@Override
-	Set<UnifyType> grArg(IFiniteClosure fc, Set<UnifyType> fBounded) {
-		return fc.grArg(this, fBounded);
-	}
-
-	@Override
-	UnifyType apply(Unifier unif) {
-		TypeParams newParams = typeParams.apply(unif);
-		
-		if(newParams.hashCode() == typeParams.hashCode() && newParams.equals(typeParams))
-			return this;
-		
-		return new ReferenceType(typeName, newParams);
-	}
-	
-	@Override
-	public UnifyType setTypeParams(TypeParams newTp) {
-		if(newTp.hashCode() == typeParams.hashCode() && newTp.equals(typeParams))
-			return this; // reduced the amount of objects created
-		return new ReferenceType(typeName, newTp);
-	}
-	
-	@Override
-	public int hashCode() {
-		return hashCode;
-	}
-	
-	@Override
-	public boolean equals(Object obj) {
-		if(!(obj instanceof ReferenceType))
-			return false;
-		
-		if(obj.hashCode() != this.hashCode())
-			return false;
-		
-		ReferenceType other = (ReferenceType) obj;
-		
-		if(!other.getName().equals(typeName))
-			return false;
-
-		return other.getTypeParams().equals(typeParams);
-	}
-}

src/main/java/de/dhbwstuttgart/typeinference/unify/model/SuperType.java

@@ -1,88 +0,0 @@
-package de.dhbwstuttgart.typeinference.unify.model;
-
-import java.util.HashMap;
-import java.util.Set;
-
-import de.dhbwstuttgart.typeinference.unify.interfaces.IFiniteClosure;
-import de.dhbwstuttgart.typeinference.unify.interfaces.UnifyTypeVisitor;
-
-/**
- * A super wildcard type e.g. ? super Integer.
- * @author Florian Steurer
- */
-public final class SuperType extends WildcardType {
-	
-	public <T> UnifyType accept(UnifyTypeVisitor<T> visitor, T ht) {
-		return visitor.visit(this, ht);
-	}
-	
-	/**
-	 * Creates a new instance "? extends superedType"
-	 * @param superedType The type that is supered e.g. Integer in "? super Integer"
-	 */
-	public SuperType(UnifyType superedType) {
-		super("? super " + superedType.getName(), superedType);
-	}
-	
-	/**
-	 * The type that is supered e.g. Integer in "? super Integer"
-	 */
-	public UnifyType getSuperedType() {
-		return wildcardedType;
-	}
-	
-	@Override
-	public String toString() {
-		return "? super " + wildcardedType;
-	}
-	
-	/**
-	 * Sets the type parameters of the wildcarded type and returns a new supertype that supers that type.
-	 */
-	@Override
-	public UnifyType setTypeParams(TypeParams newTp) {
-		UnifyType newType = wildcardedType.setTypeParams(newTp);
-		if(newType == wildcardedType)
-			return this; // Reduced the amount of objects created
-		return new SuperType(wildcardedType.setTypeParams(newTp));
-	}
-	
-	@Override
-	Set<UnifyType> smArg(IFiniteClosure fc, Set<UnifyType> fBounded) {
-		return fc.smArg(this, fBounded);
-	}
-
-	@Override
-	Set<UnifyType> grArg(IFiniteClosure fc, Set<UnifyType> fBounded) {
-		return fc.grArg(this, fBounded);
-	}
-	
-	@Override
-	UnifyType apply(Unifier unif) {
-		UnifyType newType = wildcardedType.apply(unif);
-		if(newType.hashCode() == wildcardedType.hashCode() && newType.equals(wildcardedType))
-			return this; // Reduced the amount of objects created
-		return new SuperType(newType);
-	}
-	
-	@Override
-	public int hashCode() {
-		/*
-		 * It is important that the prime that is added is different to the prime added in hashCode() of ExtendsType.
-		 * Otherwise ? extends T and ? super T have the same hashCode() for every Type T.
-		 */
-		return wildcardedType.hashCode() + 3917;
-	}
-	
-	@Override
-	public boolean equals(Object obj) {
-		if(!(obj instanceof SuperType))
-			return false;
-		
-		if(obj.hashCode() != this.hashCode())
-			return false;
-		
-		SuperType other = (SuperType) obj;
-		return other.getSuperedType().equals(wildcardedType);
-	}
-}

src/main/java/de/dhbwstuttgart/typeinference/unify/model/TypeParams.java

@@ -1,191 +0,0 @@
-package de.dhbwstuttgart.typeinference.unify.model;
-
-import java.util.*;
-
-
-/**
- * The generic or non-generic parameters of a type e.g. <T> for List<T>
- * @author Florian Steurer
- */
-public final class TypeParams implements Iterable<UnifyType>{
-	/**
-	 * The array which backs the type parameters.
-	 */
-	private final UnifyType[] typeParams;
-
-	/**
-	 * Hashcode calculation is expensive and must be cached.
-	 */
-	private final int hashCode;
-	
-	/**
-	 * Creates a new set of type parameters.
-	 * @param types The type parameters.
-	 */
-	public TypeParams(List<UnifyType> types){
-		typeParams = new UnifyType[types.size()];
-		for(int i=0;i<types.size();i++){
-			typeParams[i] = types.get(i);
-			if(types.get(i)==null)throw new NullPointerException();
-		}
-		
-		// Hashcode calculation is expensive and must be cached.
-		hashCode = Arrays.deepHashCode(typeParams);
-	}
-	
-	/**
-	 * Creates a new set of type parameters.
-	 * @param types The type parameters.
-	 */
-	public TypeParams(UnifyType... types) {
-		typeParams = types;
-	
-		// Hashcode calculation is expensive and must be cached.
-		hashCode = Arrays.deepHashCode(typeParams);
-	}
-	
-	/**
-	 * True if every parameter in this object is a placeholder type, false otherwise.
-	 */
-	public boolean arePlaceholders() {
-		return Arrays.stream(typeParams).allMatch(x -> x instanceof PlaceholderType);
-	}
-	
-	/**
-	 * Returns the number of the type parameters in this object.
-	 * @return number of type parameters, always positive (including 0).
-	 */
-	public int size() {
-		return typeParams.length;
-	}
-	
-	/**
-	 * Returns true if this object has size() of zero, false otherwise.
-	 */
-	public boolean empty() {
-		return typeParams.length == 0;
-	}
-	
-	/**
-	 * Applies a unifier to every parameter in this object.
-	 * @param unif The applied unifier.
-	 * @return A new type parameter object, where the unifier was applied to every parameter.
-	 */
-	public TypeParams apply(Unifier unif) {
-		UnifyType[] newParams = new UnifyType[typeParams.length];
-		
-		// If true, a type was modified and a new typeparams object has to be created.
-		// Otherwise it is enough to return this object, since it is immutable
-		// This reduced the needed TypeParams-Instances for the lambda14-Test from
-		// 130.000 to 30.000 without a decrease in speed.
-		boolean isNew = false; 
-		
-		for(int i = 0; i < typeParams.length; i++) {
-			UnifyType newType = typeParams[i].apply(unif);
-			newParams[i] = newType;
-			if(!isNew && (newType.hashCode() != typeParams[i].hashCode() || !newType.equals(typeParams[i])))
-				isNew = true;
-		}
-		
-		if(!isNew)
-			return this;
-		return new TypeParams(newParams);
-	}
-	
-	/**
-	 * True if the PlaceholderType t is a parameter of this object, or if any parameter
-	 * contains t (arbitrary depth of recursion), false otherwise.
-	 */
-	public boolean occurs(PlaceholderType t) {
-		for(UnifyType p : typeParams)
-			if(p instanceof PlaceholderType) {//PL 2018-01-31 dangeling else Problem { ... } eingefuegt.
-				if(p.equals(t))
-					return true;
-			}
-			else {
-				if(p.getTypeParams().occurs(t))
-					return true; }
-		return false;
-	}
-	
-	/**
-	 * Returns the i-th parameter of this object.
-	 */
-	public UnifyType get(int i) {
-		return typeParams[i];
-	}
-	
-	/**
-	 * Returns the parameters of this object.
-	 * PL 2018-03-17
-	 */
-	public UnifyType[] get() {
-		return typeParams;
-	}
-	
-	/**
-	 * Sets the the type t as the i-th parameter and returns a new object
-	 * that equals this object, except for the i-th type.
-	 */
-	public TypeParams set(UnifyType t, int idx) {
-		// Reduce the creation of new objects for less memory 
-		// Reduced the needed instances of TypeParams in the lambda14-Test from
-		// 150.000 to 130.000
-		if(t.hashCode() == typeParams[idx].hashCode() && t.equals(typeParams[idx]))
-			return this;
-		UnifyType[] newparams = Arrays.copyOf(typeParams, typeParams.length);
-		newparams[idx] = t; 
-		return new TypeParams(newparams);
-	}
-
-	@Override
-	public Iterator<UnifyType> iterator() {
-		return Arrays.stream(typeParams).iterator();
-	}
-	
-	@Override
-	public int hashCode() {
-		return hashCode;
-	}
-	
-	@Override
-	public boolean equals(Object obj) {
-		if(!(obj instanceof TypeParams))
-			return false;
-		
-		if(obj.hashCode() != this.hashCode())
-			return false;
-		
-		TypeParams other = (TypeParams) obj;
-		
-		if(other.size() != this.size())
-			return false;
-
-		for(int i = 0; i < this.size(); i++){
-			//if(this.get(i) == null)
-				//System.out.print("s");
-		}
-		for(int i = 0; i < this.size(); i++)
-			if(!(this.get(i).equals(other.get(i))))
-				return false;
-		
-		return true;
-	}
-	
-	@Override
-	public String toString() {
-		String res = "";
-		for(UnifyType t : typeParams)
-			res += t + ",";
-		return "<" + res.substring(0, res.length()-1) + ">";
-	}
-
-	public Collection<? extends PlaceholderType> getInvolvedPlaceholderTypes() {
-		ArrayList<PlaceholderType> ret = new ArrayList<>();
-		for(UnifyType t : typeParams){
-			ret.addAll(t.getInvolvedPlaceholderTypes());
-		}
-		return ret;
-	}
-}
-

src/main/java/de/dhbwstuttgart/typeinference/unify/model/Unifier.java

@@ -1,189 +0,0 @@
-package de.dhbwstuttgart.typeinference.unify.model;
-
-import java.util.HashMap;
-import java.util.HashSet;
-import java.util.Iterator;
-import java.util.Map.Entry;
-import java.util.Set;
-import java.util.function.Function;
-
-/**
- * A set of substitutions (s -> t) that is an applicable function to types and pairs.
- * @author Florian Steurer
- */
-public class Unifier implements Function<UnifyType, UnifyType>, Iterable<Entry<PlaceholderType, UnifyType>> {
-	
-	/**
-	 * The set of substitutions that unify a type-term
-	 */
-	private HashMap<PlaceholderType, UnifyType> substitutions = new HashMap<>();
-
-	/**
-	 * Creates a new instance with a single substitution (source -> target).
-	 * @param The type that is replaced
-	 * @param The type that replaces
-	 */
-	public Unifier(PlaceholderType source, UnifyType target) {
-		substitutions.put(source, target);
-	}
-	
-	/**
-	 * Identity function as an "unifier".
-	 */
-	protected Unifier() {
-
-	}
-	
-	/**
-	 * Creates an unifier that is the identity function (thus has no substitutions).
-	 */
-	public static Unifier identity() {
-		return new Unifier();
-	}
-	
-	/**
-	 * Adds a substitution to the unifier from (source -> target)
-	 * @param The type that is replaced
-	 * @param The type that replaces
-	 */
-	public void add(PlaceholderType source, UnifyType target) {
-		Unifier tempU = new Unifier(source, target);
-		// Every new substitution must be applied to previously added substitutions
-		// otherwise the unifier needs to be applied multiple times to unify two terms
-		for(PlaceholderType pt : substitutions.keySet())
-			substitutions.put(pt, substitutions.get(pt).apply(tempU));
-		substitutions.put(source, target);
-	}
-
-	@Override
-	public UnifyType apply(UnifyType t) {
-		return t.apply(this);
-	}
-	
-	/**
-	 * Applies the unifier to the two terms of the pair.
-	 * @return A new pair where the left and right-hand side are applied
-	 */
-	public UnifyPair apply(UnifyPair p) {
-		UnifyType newLhs = this.apply(p.getLhsType());
-		UnifyType newRhs = this.apply(p.getRhsType());
-		return new UnifyPair(newLhs, newRhs, p.getPairOp());
-	}
-	
-	/**
-	 * Applies the unifier to the two terms of the pair.
-	 * works only for single subsitution
-	 * @return A new pair where the left and right-hand side are applied
-	 */
-	public UnifyPair apply(UnifyPair thisAsPair, UnifyPair p) {
-		UnifyType newLhs = this.apply(p.getLhsType());
-		UnifyType newRhs = this.apply(p.getRhsType());
-		//Varianceweitergabe wird nicht benoetigt.
-		//PlaceholderType lhsph = (PlaceholderType)thisAsPair.getLhsType();
-		//if (lhsph.getVariance() != 0) {
-		//	if (p.getLhsType().equals(lhsph)) {
-		//		if (p.getRhsType() instanceof PlaceholderType) {
-		//			((PlaceholderType)p.getRhsType()).setVariance(lhsph.getVariance());
-		//		}
-		//	}
-		//	if (p.getRhsType().equals(lhsph)) {
-		//		if (p.getLhsType() instanceof PlaceholderType) {
-		//			((PlaceholderType)p.getLhsType()).setVariance(lhsph.getVariance());
-		//		}
-		//	}
-		//}
-		if (!(p.getLhsType().equals(newLhs)) || !(p.getRhsType().equals(newRhs))) {//Die Anwendung von this hat was veraendert PL 2018-04-01
-			Set<UnifyPair> suniUnifyPair = new HashSet<>();
-			suniUnifyPair.addAll(thisAsPair.getAllSubstitutions());
-			suniUnifyPair.add(thisAsPair);
-			if (p.getLhsType() instanceof PlaceholderType //&& newLhs instanceof PlaceholderType entfernt PL 2018-04-13
-					&& p.getPairOp() == PairOperator.EQUALSDOT) {
-				suniUnifyPair.add(p); //p koennte auch subsitution sein
-			}
-			return new UnifyPair(newLhs, newRhs, p.getPairOp(), suniUnifyPair, p);
-		}
-		return new UnifyPair(newLhs, newRhs, p.getPairOp(), p.getSubstitution(), p.getBasePair(), p.getfBounded());
-	}
-	
-	/**
-	 * Applies the unifier to the left terms of the pair.
-	 * @return A new pair where the left and right-hand side are applied
-	 */
-	public UnifyPair applyleft(UnifyPair p) {
-		return new UnifyPair(this.apply(p.getLhsType()), p.getRhsType(), p.getPairOp());
-	}
-	
-	/**
-	 * True if the typevariable t will be substituted if the unifier is applied.
-	 * false otherwise.
-	 */
-	public boolean hasSubstitute(PlaceholderType t) {
-		return substitutions.containsKey(t);
-	}
-	
-	/**
-	 * Returns the type that will replace the typevariable t if the unifier is applied.
-	 */
-	public UnifyType getSubstitute(PlaceholderType t) {
-		return substitutions.get(t);
-	}
-
-	/**
-	 * The number of substitutions in the unifier. If zero, this is the identity function.
-	 */
-	public int size() {
-		return substitutions.size();
-	}
-	
-	/**
-	 * Garantuees that if there is a substitutions (a -> b) in this unifier,
-	 * a is not an element of the targetParams. Substitutions that do not
-	 * satisfy this condition, are swapped.
-	 */
-	public void swapPlaceholderSubstitutions(Iterable<UnifyType> targetParams) {
-		for(UnifyType tph : targetParams) {
-			if(!(tph instanceof PlaceholderType))
-				continue;
-			// Swap a substitutions (a -> b) if a is an element of the target params.
-			if(substitutions.containsKey(tph)) {		
-				if((substitutions.get(tph) instanceof PlaceholderType)) {
-					PlaceholderType newLhs = (PlaceholderType) substitutions.get(tph);
-					substitutions.remove(tph);
-					substitutions.put(newLhs, tph);
-				}
-			}
-		}
-	}
-	
-	public void swapPlaceholderSubstitutionsReverse(Iterable<UnifyType> sourceParams) {
-		for(UnifyType tph : sourceParams) {
-			if(!(tph instanceof PlaceholderType))
-				continue;
-			if(substitutions.containsValue(tph)) {
-				UnifyType key = substitutions.values().stream().filter(x -> x.equals(tph)).findAny().get();
-				if(key instanceof PlaceholderType) {
-					PlaceholderType newLhs = (PlaceholderType) tph;
-					substitutions.remove(key);
-					substitutions.put(newLhs, key);
-				}
-			}
-		}
-	}
-
-	@Override
-	public String toString() {
-		String result = "{ ";
-		for(Entry<PlaceholderType, UnifyType> entry : substitutions.entrySet())
-			result += "(" + entry.getKey() + " -> " + entry.getValue() + "), ";
-		if(!substitutions.isEmpty())
-			result = result.substring(0, result.length()-2);
-		result += " }";
-		return result;
-	}
-
-	@Override
-	public Iterator<Entry<PlaceholderType, UnifyType>> iterator() {
-		return substitutions.entrySet().iterator();
-	}
-}
-

src/main/java/de/dhbwstuttgart/typeinference/unify/model/UnifyPair.java

@@ -1,247 +0,0 @@
-package de.dhbwstuttgart.typeinference.unify.model;
-
-import java.util.ArrayList;
-import java.util.Collection;
-import java.util.HashSet;
-import java.util.List;
-import java.util.Optional;
-import java.util.Set;
-
-
-/**
- * A pair which contains two types and an operator, e.q. (Integer <. a).
- * @author Florian Steurer
- */
-public class UnifyPair {
-	
-	/**
-	 * The type on the left hand side of the pair.
-	 */
-	private final UnifyType lhs;
-	
-	/**
-	 * The type on the right hand side of the pair.
-	 */
-	private final UnifyType rhs;
-	
-	/**
-	 * The operator that determines the relation between the left and right hand side type.
-	 */
-	private PairOperator pairOp;
-    
-    private boolean undefinedPair = false;
-    
-    /**
-     * Unifier/substitute that generated this pair
-     * PL 2018-03-15
-     */
-    private Set<UnifyPair> substitution;
-    
-    /**
-     * Base on which the the unifier is applied
-     * PL 2018-03-15
-     */
-    private UnifyPair basePair;
-    
-    /**
-     * For pairs a <. Theta generated in the rule reduceTphSup
-     * to store the f-Bouned Elements to avoid endless recursion 
-     * PL 2018-03-15
-     */
-    private Set<UnifyType> fBounded = new HashSet<>();
-	
-	private final int hashCode;
-	
-	/**
-	 * Creates a new instance of the pair.
-	 * @param lhs The type on the left hand side of the pair.
-	 * @param rhs The type on the right hand side of the pair.
-	 * @param op The operator that determines the relation between the left and right hand side type.
-	 */
-	public UnifyPair(UnifyType lhs, UnifyType rhs, PairOperator op) {
-		this.lhs = lhs;
-		this.rhs = rhs;
-		pairOp = op;
-		substitution = new HashSet<>();
-		
-		// Caching hashcode
-		hashCode = 17 + 31 * lhs.hashCode() + 31 * rhs.hashCode() + 31 * pairOp.hashCode();
-	}	
-	
-	public UnifyPair(UnifyType lhs, UnifyType rhs, PairOperator op, Set<UnifyPair> uni, UnifyPair base) {
-		this.lhs = lhs;
-		this.rhs = rhs;
-		pairOp = op;
-		substitution = uni;
-		basePair = base;
-		
-		
-		// Caching hashcode
-		hashCode = 17 + 31 * lhs.hashCode() + 31 * rhs.hashCode() + 31 * pairOp.hashCode();
-	}	
-	
-	public UnifyPair(UnifyType lhs, UnifyType rhs, PairOperator op, Set<UnifyPair> uni, UnifyPair base, Set<UnifyType> fBounded) {
-		this(lhs, rhs, op, uni, base);
-		
-		this.fBounded = fBounded;
-	}
-		
-	/**
-	 * Returns the type on the left hand side of the pair.
-	 */
-	public UnifyType getLhsType() {
-		return lhs;
-	}
-	
-	/**
-	 * Returns the type on the right hand side of the pair.
-	 */
-	public UnifyType getRhsType() {
-		return rhs;
-	}
-	
-	/**
-	 * Returns the operator that determines the relation between the left and right hand side type.
-	 */
-	public PairOperator getPairOp() {
-		return pairOp;
-	}
-	
-	public void setPairOp(PairOperator po) {
-		pairOp = po;
-	}
-	
-	public void addSubstitutions(Set<UnifyPair> sup) {
-		substitution.addAll(sup);
-	}
-	
-	public void setUndefinedPair() {
-		undefinedPair = true;
-	}
-	public Set<UnifyPair> getSubstitution() {
-		return new HashSet<>(substitution);
-	}
-	
-	public UnifyPair getBasePair() {
-		return basePair;
-	}
-	public boolean isUndefinedPair() {
-		return undefinedPair;
-	}
-	
-	public Set<UnifyPair> getAllSubstitutions () {
-		Set<UnifyPair> ret = new HashSet<>();
-		ret.addAll(new ArrayList<>(getSubstitution()));
-		if (basePair != null) {
-			ret.addAll(new ArrayList<>(basePair.getAllSubstitutions()));
-		}
-		return ret;
-	}
-	
-	public Set<UnifyPair> getThisAndAllBases () {
-		Set<UnifyPair> ret = getAllBases();
-		ret.add(this);
-		return ret;
-	}
-	public Set<UnifyPair> getAllBases () {
-		Set<UnifyPair> ret = new HashSet<>();
-		if (basePair != null) {
-			ret.add(getBasePair());
-			ret.addAll(basePair.getAllBases());
-		}
-		return ret;
-	}
-	
-	public UnifyPair getGroundBasePair () {
-		if (basePair == null) {
-			return this;
-		}
-		if (basePair.getBasePair() == null) {
-			return basePair;
-		}
-		else {
-			return basePair.getGroundBasePair();
-		}
-	}
-	
-	/**
-	 * wenn in einem  Paar bestehend aus 2 Typvariablen eine nicht wildcardtable ist,
-	 * so beide auf nicht wildcardtable setzen
-	 */
-	public void disableCondWildcards() {
-		if (lhs instanceof PlaceholderType && rhs instanceof PlaceholderType
-			&& (!((PlaceholderType)lhs).isWildcardable() || !((PlaceholderType)rhs).isWildcardable()))
-		{
-			((PlaceholderType)lhs).disableWildcardtable();
-			((PlaceholderType)rhs).disableWildcardtable();
-		}
-			
-	}
-	
-	public Boolean wrongWildcard() {
-		return lhs.wrongWildcard() || rhs.wrongWildcard();
-	}
-	
-	public Set<UnifyType> getfBounded() {
-		return this.fBounded;
-	}
-	
-	@Override
-	public boolean equals(Object obj) {
-		if(!(obj instanceof UnifyPair))
-			return false;
-		
-		if(obj.hashCode() != this.hashCode())
-			return false;
-
-		UnifyPair other = (UnifyPair) obj;
-		
-		if (isUndefinedPair()) {
-			if (other.getBasePair() != basePair || (other.getBasePair() == null && basePair == null)) { 
-				return false;
-			}
-			
-			if (!other.getBasePair().equals(basePair) ||
-				!other.getAllSubstitutions().equals(getAllSubstitutions())) {
-				return false;
-			}
-		}
-
-		
-		return other.getPairOp() == pairOp 
-				&& other.getLhsType().equals(lhs) 
-				&& other.getRhsType().equals(rhs);
-	}
-
-	@Override
-	public int hashCode() {
-		return hashCode;
-	}
-	
-	@Override
-	public String toString() {
-		String ret = "";
-		if (lhs instanceof PlaceholderType) {
-			ret = new Integer(((PlaceholderType)lhs).getVariance()).toString() + " "
-					+ "WC: " + ((PlaceholderType)lhs).isWildcardable()
-					+ ", IT: " + ((PlaceholderType)lhs).isInnerType();
-		}
-		if (rhs instanceof PlaceholderType) {
-			ret = ret + ", " + new Integer(((PlaceholderType)rhs).getVariance()).toString() + " " 
-					+ "WC: " + ((PlaceholderType)rhs).isWildcardable()
-					+ ", IT: " + ((PlaceholderType)rhs).isInnerType();
-		}
-		return "(" + lhs + " " + pairOp + " " + rhs + ", " + ret + ")"; //+ ", [" + getfBounded().toString()+ "])";
-	}
-
-	/*
-	public List<? extends PlaceholderType> getInvolvedPlaceholderTypes() {
-		ArrayList<PlaceholderType> ret = new ArrayList<>();
-		ret.addAll(lhs.getInvolvedPlaceholderTypes());
-		ret.addAll(rhs.getInvolvedPlaceholderTypes());
-		return ret;
-	}
-	*/
-}
-
-

src/main/java/de/dhbwstuttgart/typeinference/unify/model/UnifyType.java

@@ -1,119 +0,0 @@
-package de.dhbwstuttgart.typeinference.unify.model;
-
-import java.util.ArrayList;
-import java.util.Collection;
-import java.util.HashMap;
-import java.util.List;
-import java.util.Set;
-
-import de.dhbwstuttgart.typeinference.unify.interfaces.IFiniteClosure;
-import de.dhbwstuttgart.typeinference.unify.interfaces.UnifyTypeVisitor;
-
-/**
- * Represents a java type.
- * @author Florian Steurer
- */
-public abstract class UnifyType {
-	
-	/**
-	 * The name of the type e.q. "Integer", "? extends Integer" or "List" for (List<T>)
-	 */
-	protected final String typeName;
-	
-	/**
-	 * The type parameters of the type.
-	 */
-	protected final TypeParams typeParams;
-	
-	/**
-	 * Creates a new instance
-	 * @param name Name of the type (e.q. List for List<T>, Integer or ? extends Integer)
-	 * @param typeParams Parameters of the type (e.q. <T> for List<T>)
-	 */
-	protected UnifyType(String name, TypeParams p) {
-		typeName = name;
-		typeParams = p;
-	}
-	
-
-	abstract public <T> UnifyType accept(UnifyTypeVisitor<T> visitor, T ht); 
-	
-	/**
-	 * Returns the name of the type.
-	 * @return The name e.q. List for List<T>, Integer or ? extends Integer
-	 */
-	public String getName() {
-		return typeName;
-	}
-	
-	/**
-	 * The parameters of the type.
-	 * @return Parameters of the type, e.q. <T> for List<T>.
-	 */
-	public TypeParams getTypeParams() {
-		return typeParams;
-	}
-	
-	/**
-	 * Returns a new type that equals this type except for the type parameters.
-	 * @param newTp The type params of the new type.
-	 * @return A new type object.
-	 */
-	public abstract UnifyType setTypeParams(TypeParams newTp);
-	
-	/**
-	 * Implementation of the visitor-pattern. Returns the set of smArg
-	 * by calling the most specific overload in the FC.
-	 * @param fc The FC that is called.
-	 * @return The set that is smArg(this)
-	 */
-	abstract Set<UnifyType> smArg(IFiniteClosure fc, Set<UnifyType> fBounded);
-	
-	/**
-	 * Implementation of the visitor-pattern. Returns the set of grArg
-	 * by calling the most specific overload in the FC.
-	 * @param fc The FC that is called.
-	 * @return The set that is grArg(this)
-	 */
-	abstract Set<UnifyType> grArg(IFiniteClosure fc, Set<UnifyType> fBounded);
-	
-	/**
-	 * Applies a unifier to this object.
-	 * @param unif The unifier
-	 * @return A UnifyType, that may or may not be a new object, that has its subtypes substituted.
-	 */
-	abstract UnifyType apply(Unifier unif);
-	
-	@Override
-	public String toString() {
-		String params = "";
-		if(typeParams.size() != 0) {
-			for(UnifyType param : typeParams)
-				params += param.toString() + ",";
-			params = "<" + params.substring(0, params.length()-1) + ">";
-		}
-		
-		return typeName + params;
-	}
-
-	public Collection<PlaceholderType> getInvolvedPlaceholderTypes() {
-		ArrayList<PlaceholderType> ret = new ArrayList<>();
-		ret.addAll(typeParams.getInvolvedPlaceholderTypes());
-		return ret;
-	}
-	
-	public Boolean wrongWildcard() {//default
-		return false;
-	}
-
-	@Override
-	public int hashCode() {
-		return this.toString().hashCode();
-	}
-
-	@Override
-	public boolean equals(Object obj) {
-		if(obj == null)return false;
-		return this.toString().equals(obj.toString());
-	}
-}

src/main/java/de/dhbwstuttgart/typeinference/unify/model/WildcardType.java

@@ -1,72 +0,0 @@
-package de.dhbwstuttgart.typeinference.unify.model;
-
-import java.util.ArrayList;
-import java.util.Collection;
-
-/**
- * A wildcard type that is either a ExtendsType or a SuperType.
- * @author Florian Steurer
- */
-public abstract class WildcardType extends UnifyType {
-	
-	/**
-	 * The wildcarded type, e.q. Integer for ? extends Integer. Never a wildcard type itself.
-	 */
-	protected UnifyType wildcardedType;
-	
-	/**
-	 * Creates a new instance.
-	 * @param name The name of the type, e.q. ? extends Integer
-	 * @param wildcardedType The wildcarded type, e.q. Integer for ? extends Integer. Never a wildcard type itself.
-	 */
-	protected WildcardType(String name, UnifyType wildcardedType) {
-		super(name, wildcardedType.getTypeParams());
-		this.wildcardedType = wildcardedType;
-	}
-	
-	/**
-	 * Returns the wildcarded type, e.q. Integer for ? extends Integer.
-	 * @return The wildcarded type. Never a wildcard type itself.
-	 */
-	public UnifyType getWildcardedType() {
-		return wildcardedType;
-	}
-	
-	/**
-	 * Returns the type parameters of the WILDCARDED TYPE.
-	 */
-	@Override
-	public TypeParams getTypeParams() {
-		return wildcardedType.getTypeParams();
-	}
-	
-	@Override
-	public Boolean wrongWildcard () {//This is an error
-		return (wildcardedType instanceof WildcardType);
-	}
-	
-	@Override
-	public int hashCode() {
-		return wildcardedType.hashCode() + getName().hashCode() + 17;
-	}
-	
-	@Override
-	public boolean equals(Object obj) {
-		if(!(obj instanceof WildcardType))
-			return false;
-		
-		if(obj.hashCode() != this.hashCode())
-			return false;
-		
-		WildcardType other = (WildcardType) obj;
-		return other.getWildcardedType().equals(wildcardedType);
-	}
-	
-
-	@Override
-	public Collection<PlaceholderType> getInvolvedPlaceholderTypes() {
-		ArrayList<PlaceholderType> ret = new ArrayList<>();
-		ret.addAll(wildcardedType.getInvolvedPlaceholderTypes());
-		return ret;
-	}
-}

src/main/java/de/dhbwstuttgart/typeinference/unify/model/hashKeyType.java

@@ -1,25 +0,0 @@
-package de.dhbwstuttgart.typeinference.unify.model;
-
-public class hashKeyType {
-	UnifyType realType;
-	
-	hashKeyType(UnifyType realType) {
-		this.realType= realType;
-	}
-	
-	@Override
-	public boolean equals(Object obj) {
-		if (obj instanceof hashKeyType) {
-			return realType.equals(((hashKeyType)obj).realType);
-		}
-		else
-		{
-			return false;
-		}
-	}
-	
-	@Override
-	public int hashCode() {
-		return realType.hashCode();
-	}
-}

src/main/java/de/dhbwstuttgart/typeinference/unify/visitUnifyTypeVisitor.java

@@ -1,47 +0,0 @@
-package de.dhbwstuttgart.typeinference.unify;
-
-import java.util.ArrayList;
-import java.util.Arrays;
-import java.util.HashSet;
-import java.util.HashMap;
-import java.util.stream.Collectors;
-
-import de.dhbwstuttgart.typeinference.unify.interfaces.UnifyTypeVisitor;
-import de.dhbwstuttgart.typeinference.unify.model.ExtendsType;
-import de.dhbwstuttgart.typeinference.unify.model.FunNType;
-import de.dhbwstuttgart.typeinference.unify.model.PlaceholderType;
-import de.dhbwstuttgart.typeinference.unify.model.ReferenceType;
-import de.dhbwstuttgart.typeinference.unify.model.SuperType;
-import de.dhbwstuttgart.typeinference.unify.model.TypeParams;
-
-public class visitUnifyTypeVisitor<T> implements UnifyTypeVisitor<T> {
-
-	public ReferenceType visit(ReferenceType refty, T ht) {
-		return new ReferenceType(refty.getName(),
-				new TypeParams(
-						Arrays.stream(refty.getTypeParams().get())
-						.map(x -> x.accept(this, ht))
-						.collect(Collectors.toCollection(ArrayList::new))));
-	}
-	
-	public PlaceholderType visit(PlaceholderType phty, T ht) {
-		return phty;
-	}
-	
-	public FunNType visit(FunNType funnty, T ht) {
-		return FunNType.getFunNType(
-				new TypeParams(
-						Arrays.stream(funnty.getTypeParams().get())
-						.map(x -> x.accept(this, ht))
-						.collect(Collectors.toCollection(ArrayList::new)))
-				);	
-	}
-	
-	public SuperType visit(SuperType suty, T ht) {
-		return new SuperType(suty.getWildcardedType().accept(this, ht));
-	}
-	
-	public ExtendsType visit(ExtendsType extty, T ht) {
-		return new ExtendsType(extty.getWildcardedType().accept(this, ht));
-	}
-}

src/main/java/de/dhbwstuttgart/util/BiRelation.java

@@ -1,19 +0,0 @@
-package de.dhbwstuttgart.util;
-
-import java.util.ArrayList;
-
-public class BiRelation<X,Y> extends ArrayList<Pair<X,Y>>{
-
-	public void put(X x, Y y) {
-		this.add(new Pair<>(x,y));
-	}
-	
-	public void put(Pair<X,Y> p) {
-		this.add(p);
-	}
-	
-	
-	public void putAll(BiRelation<X,Y> br) {
-		this.addAll(br);
-	}
-}

src/main/java/de/dhbwstuttgart/util/Pair.java

@@ -1,25 +0,0 @@
-package de.dhbwstuttgart.util;
-
-import java.util.Optional;
-
-public class Pair<T, T1> {
-    private final T key;
-    private final T1 value;
-
-    public Pair(T a, T1 b) {
-        this.value = b;
-        this.key = a;
-    }
-
-    public Optional<T1> getValue() {
-        return Optional.of(value);
-    }
-
-    public T getKey() {
-        return key;
-    }
-    
-    public String toString() {
-    	return "(" + key.toString() + "," + value.toString() + ")\n";
-    }
-}

src/test/data/OrTestAllClassesWith3AddMethodsABCDCalls.cons

@@ -0,0 +1,427 @@
+{ _b<._E, _a<.java.util.concurrent.ConcurrentLinkedDeque |
+_b<.javax.swing.JMenuItem, _a<.javax.swing.JPopupMenu |
+_b<.java.math.BigInteger, _a<.java.math.BigInteger |
+_b<.java.awt.MenuItem, _a<.java.awt.Menu |
+_b<.java.lang.Object, _a<.java.beans.beancontext.BeanContextSupport |
+_b<.javax.xml.stream.XMLEventReader, _a<.javax.xml.stream.XMLEventWriter |
+_b<._E, _a<.java.util.AbstractList |
+_b<._E, _a<.java.util.HashSet |
+_b<._E, _a<.java.util.ListIterator |
+_b<._E, _a<.java.util.LinkedList |
+_b<.java.awt.geom.Point2D, _a<.java.awt.geom.Rectangle2D |
+_b<._E, _a<.java.util.concurrent.DelayQueue |
+_b<._E, _a<.java.util.concurrent.CopyOnWriteArrayList |
+_b<._E, _a<.java.util.AbstractQueue |
+_b<.double, _a<.java.util.concurrent.atomic.DoubleAdder |
+_b<.java.lang.String, _a<.javax.naming.CompoundName |
+_b<._E, _a<.java.util.List |
+_b<.javax.swing.JMenuItem, _a<.javax.swing.JMenu |
+_b<.java.security.Permission, _a<.java.security.Permissions |
+_b<.long, _a<.java.util.stream.LongStream$Builder |
+_b<._E, _a<.java.util.AbstractCollection |
+_b<._E, _a<.java.util.concurrent.PriorityBlockingQueue |
+_b<.java.lang.CharSequence, _a<.java.util.StringJoiner |
+_b<._E, _a<.java.util.concurrent.ArrayBlockingQueue |
+_b<.javax.swing.JMenu, _a<.javax.swing.JMenuBar |
+_b<.java.math.BigDecimal, _a<.java.math.BigDecimal |
+_b<.java.lang.String, _a<.javax.swing.JPopupMenu |
+_b<.javax.management.relation.Role, _a<.javax.management.relation.RoleList |
+_b<.java.lang.String, _a<.javax.naming.Name |
+_b<.javax.xml.datatype.Duration, _a<.javax.xml.datatype.Duration |
+_b<.javax.accessibility.AccessibleState, _a<.javax.accessibility.AccessibleStateSet |
+_b<.javax.naming.RefAddr, _a<.javax.naming.Reference |
+_b<.javax.xml.stream.events.XMLEvent, _a<.javax.xml.stream.util.XMLEventConsumer |
+_b<._E, _a<.java.util.concurrent.ConcurrentSkipListSet |
+_b<._E, _a<.java.util.ArrayList |
+_b<.javax.print.attribute.Attribute, _a<.javax.print.attribute.PrintServiceAttributeSet |
+_b<.java.lang.Object, _a<.javax.naming.directory.BasicAttribute |
+_b<._E, _a<.java.util.concurrent.ConcurrentLinkedQueue |
+_b<.java.lang.String, _a<.java.awt.Choice |
+_b<.java.lang.Object, _a<.javax.management.relation.RoleUnresolvedList |
+_b<.javax.accessibility.AccessibleRelation, _a<.javax.accessibility.AccessibleRelationSet |
+_b<.java.awt.RenderingHints, _a<.java.awt.RenderingHints |
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src/test/data/OrTestAllClassesWithAddMethod.cons

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src/test/data/OrTestAllClassesWithAddMethod2.cons

@@ -0,0 +1,651 @@
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src/test/data/OrTestAllClassesWithAddMethodAll.cons

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src/test/java/CycleCheckTest.java

@@ -0,0 +1,97 @@
+import de.dhbwstuttgart.input.ConstraintParser;
+import de.dhbwstuttgart.sat.asp.ASPGenerator;
+import org.junit.Test;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertTrue;
+
+/**
+ * The facts behind {@code src/main/asp/cycleCheck.lp}. A constraint set that forces a placeholder
+ * to equal a type properly containing itself has no finite solution, and clingo's grounder
+ * diverges on it rather than reporting UNSAT (see ../../ASP_BUGS.md, Bug 5). The check runs before
+ * the solve, on placeholder identities alone, so it costs nothing however deep the types are.
+ *
+ * <p>What matters here is the containment/flow distinction: only a containment edge can put a
+ * placeholder inside its own type, so only a cycle through one of those is fatal.
+ */
+public class CycleCheckTest {
+
+    private static String facts(String cons) {
+        return ASPGenerator.generateCycleCheckFacts(ConstraintParser.parse(cons));
+    }
+
+    // "_r <. C1<_p1>" - solving _r means solving _p1 inside it.
+    @Test
+    public void aPlaceholderBoundedByAParameterizedTypeYieldsAContainsEdge() {
+        String f = facts("_r <. C1<_p1>,");
+        assertTrue(f, f.contains("containsEdge(0,0,\"_r\",\"_p1\")"));
+        assertTrue("no flow edge expected: " + f, !f.contains("flowEdge"));
+    }
+
+    // "_p <. _res" between two placeholders is a plain flow: harmless on its own, and harmless
+    // even in a cycle, because it never nests one type inside another.
+    @Test
+    public void aPlaceholderToPlaceholderConstraintYieldsAFlowEdge() {
+        String f = facts("_p <. _res,");
+        assertTrue(f, f.contains("flowEdge(0,0,\"_p\",\"_res\")"));
+        assertTrue("no contains edge expected: " + f, !f.contains("containsEdge"));
+    }
+
+    // Equality is symmetric, so it constrains in both directions.
+    @Test
+    public void equalityBetweenPlaceholdersYieldsBothFlowDirections() {
+        String f = facts("_a =. _b,");
+        assertTrue(f, f.contains("flowEdge(0,0,\"_a\",\"_b\")"));
+        assertTrue(f, f.contains("flowEdge(0,0,\"_b\",\"_a\")"));
+    }
+
+    // "C<_q> =. _p" says _p IS that type, so it must contain _q.
+    @Test
+    public void equalityWithAParameterizedTypeOnTheLeftStillYieldsAContainsEdge() {
+        String f = facts("C1<_q> =. _p,");
+        assertTrue(f, f.contains("containsEdge(0,0,\"_p\",\"_q\")"));
+    }
+
+    // ...but "C<_q> <. _p" does not: being a supertype of C<_q> does not oblige _p to contain _q.
+    // Deliberately conservative - a missing edge only costs detection, an invented one would
+    // reject a satisfiable constraint set.
+    @Test
+    public void aParameterizedLowerBoundYieldsNoContainsEdge() {
+        String f = facts("C1<_q> <. _p,");
+        assertTrue("expected no containment obligation: " + f, !f.contains("containsEdge"));
+    }
+
+    @Test
+    public void nestedTypeArgumentsAreReachedAtEveryDepth() {
+        String f = facts("_r <. C1<C2<_deep>>,");
+        assertTrue(f, f.contains("containsEdge(0,0,\"_r\",\"_deep\")"));
+    }
+
+    // Every alternative of an or-constraint is indexed separately, so the solver-side check can
+    // pick alternatives independently - which is the whole point, since a cycle usually needs a
+    // particular combination of them.
+    @Test
+    public void eachOrConstraintAlternativeIsIndexedSeparately() {
+        String f = facts("{ _r <. C1<_p1>, _p1 <. _res | _r <. C2<_p2>, _p2 <. _res }");
+        assertTrue(f, f.contains("alt(0,0)"));
+        assertTrue(f, f.contains("alt(0,1)"));
+        assertTrue(f, f.contains("containsEdge(0,0,\"_r\",\"_p1\")"));
+        assertTrue(f, f.contains("containsEdge(0,1,\"_r\",\"_p2\")"));
+    }
+
+    // A constraint outside any or-constraint becomes an or-constraint with one alternative, so
+    // its edges are always chosen - no special case needed in the .lp.
+    @Test
+    public void mandatoryConstraintsBecomeASingleAlternativeOrConstraint() {
+        String f = facts("_res <. _r,\n{ _r <. C1<_p1> | _r <. C2<_p1> }");
+        long alts = f.lines().filter(l -> l.startsWith("alt(0,")).count();
+        assertEquals("the mandatory conjunction should be one alternative: " + f, 1, alts);
+    }
+
+    @Test
+    public void groundConstraintsContributeNoEdgesAtAll() {
+        String f = facts("java.lang.Integer <. java.lang.Number,");
+        assertTrue("ground constraint should add no edges: " + f,
+                !f.contains("containsEdge") && !f.contains("flowEdge"));
+    }
+}

src/test/java/MainTest.java

@@ -0,0 +1,101 @@
+import de.dhbwstuttgart.Main;
+import org.junit.Test;
+
+import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.Path;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertTrue;
+
+public class MainTest {
+
+    @Test
+    public void genFactsWritesAspFacts() throws IOException {
+        Path cons = Files.createTempFile("constraints", ".cons");
+        Path facts = Files.createTempFile("facts", ".lp");
+        try {
+            Files.writeString(cons, "_Foo_3 <. java.lang.Number,\n");
+            Main.main(new String[]{"gen-facts", cons.toString(), facts.toString()});
+            String written = Files.readString(facts);
+            assertTrue(written.contains("orCons("));
+            assertTrue(written.contains("subcons(tph(\"_Foo_3\")"));
+            assertTrue(written.contains("type(\"java.lang.Number\",null)"));
+        } finally {
+            Files.deleteIfExists(cons);
+            Files.deleteIfExists(facts);
+        }
+    }
+
+    @Test
+    public void genFactsAlsoIncludesExtendsRelations() throws IOException {
+        // "Matrix < java.util.Vector" is exactly the extendsRelation text JavaConstraintGenerator
+        // now emits (see JavaProjectExtractor#getExtendsRelations), mixed into the same .cons
+        // file as ordinary constraints.
+        Path cons = Files.createTempFile("constraints", ".cons");
+        Path facts = Files.createTempFile("facts", ".lp");
+        try {
+            Files.writeString(cons, "Matrix < java.util.Vector\n_Foo_3 <. java.lang.Number,\n");
+            Main.main(new String[]{"gen-facts", cons.toString(), facts.toString()});
+            String written = Files.readString(facts);
+            assertTrue(written.contains("orCons("));
+            // A guarded rule, not a bare fact. Head and body are different predicates -
+            // subtype/2 vs. subtype/1, the latter derived by unifyDiss.lp from subcons - so the
+            // rule is not self-referential. The body is what binds the type parameters of a
+            // generic extends relation, which is what keeps the rule safe for clingo.
+            assertTrue("actual: " + written, written.contains(
+                    "subtype(type(\"Matrix\",null),type(\"java.util.Vector\",null))"
+                            + ":-subtype(type(\"Matrix\",null))."));
+        } finally {
+            Files.deleteIfExists(cons);
+            Files.deleteIfExists(facts);
+        }
+    }
+
+    @Test
+    public void parseSolutionWritesJsonWithLeadingUnderscoreRestored() throws IOException {
+        Path atoms = Files.createTempFile("atoms", ".txt");
+        Path solution = Files.createTempFile("solution", ".json");
+        try {
+            Files.writeString(atoms, "sigma(tph(\"_Foo_3\"),type(\"java.lang.Integer\",null))");
+            Main.main(new String[]{"parse-solution", atoms.toString(), solution.toString()});
+            String json = Files.readString(solution);
+            assertTrue(json.contains("\"_Foo_3\""));
+            assertTrue(json.contains("\"java.lang.Integer\""));
+        } finally {
+            Files.deleteIfExists(atoms);
+            Files.deleteIfExists(solution);
+        }
+    }
+
+    @Test
+    public void genFactsHandlesAnEmptyConstraintFileWithoutCrashing() throws IOException {
+        // Both ANTLR grammars require at least one entry, so a blank .cons file - e.g. from a
+        // Java file with no constraint-generating constructs yet supported - must not crash.
+        Path cons = Files.createTempFile("constraints", ".cons");
+        Path facts = Files.createTempFile("facts", ".lp");
+        try {
+            Files.writeString(cons, "");
+            Main.main(new String[]{"gen-facts", cons.toString(), facts.toString()});
+            assertEquals("", Files.readString(facts));
+        } finally {
+            Files.deleteIfExists(cons);
+            Files.deleteIfExists(facts);
+        }
+    }
+
+    @Test
+    public void parseSolutionHandlesEmptyAtomsWithoutCrashing() throws IOException {
+        Path atoms = Files.createTempFile("atoms", ".txt");
+        Path solution = Files.createTempFile("solution", ".json");
+        try {
+            Files.writeString(atoms, "");
+            Main.main(new String[]{"parse-solution", atoms.toString(), solution.toString()});
+            assertEquals("{\n}\n", Files.readString(solution));
+        } finally {
+            Files.deleteIfExists(atoms);
+            Files.deleteIfExists(solution);
+        }
+    }
+}

src/test/java/SolutionParserTest.java

@@ -0,0 +1,44 @@
+import de.dhbwstuttgart.output.SolutionParser;
+import org.junit.Test;
+
+import java.util.Map;
+
+import static org.junit.Assert.assertEquals;
+
+public class SolutionParserTest {
+    @Test
+    public void parsePlaceholderNameWithInternalUnderscore(){
+        // JavaConstraintGenerator always names placeholders "_<basename>_<counter>", e.g.
+        // "_Foo_3" - the tph rule's IDENTIFIER token must accept the internal underscore.
+        String solution = "sigma(tph(\"_Foo_3\"),type(\"java.lang.Integer\",null))";
+        Map<String,String> sigmas = SolutionParser.parse(solution);
+        assertEquals("java.lang.Integer", sigmas.get("Foo_3"));
+    }
+
+    @Test
+    public void parseMatrixSolution(){
+        String solution = "sigma(tph(\"_AMY\"),type(\"java.lang.Integer\",null)) sigma(tph(\"_AK\"),type(\"java.lang.Number\",null)) sigma(tph(\"_AY\"),type(\"java.lang.Number\",null)) sigma(tph(\"_J\"),type(\"java.lang.Number\",null)) sigma(tph(\"_V\"),type(\"java.lang.Integer\",null)) sigma(tph(\"_G\"),type(\"java.lang.Integer\",null)) sigma(tph(\"_BK\"),type(\"java.lang.Integer\",null)) sigma(tph(\"_BA\"),type(\"java.lang.Integer\",null)) sigma(tph(\"_U\"),type(\"java.lang.Integer\",null)) sigma(tph(\"_BU\"),type(\"java.lang.Integer\",null)) sigma(tph(\"_BO\"),type(\"java.lang.Integer\",null)) sigma(tph(\"_BG\"),type(\"java.lang.Number\",null)) sigma(tph(\"_BB\"),type(\"java.lang.Integer\",null)) sigma(tph(\"_BV\"),type(\"java.lang.Integer\",null)) sigma(tph(\"_AU\"),type(\"java.lang.Integer\",null)) sigma(tph(\"_AF\"),type(\"java.lang.Integer\",null)) sigma(tph(\"_BC\"),type(\"java.lang.Integer\",null)) sigma(tph(\"_AS\"),type(\"java.util.Vector\",params(type(\"java.lang.Integer\",null)))) sigma(tph(\"_BD\"),type(\"java.lang.Integer\",null)) sigma(tph(\"_AG\"),type(\"java.lang.Integer\",null)) sigma(tph(\"_AV\"),type(\"java.lang.Integer\",null)) sigma(tph(\"_ANN\"),type(\"java.lang.Integer\",null)) sigma(tph(\"_ANH\"),type(\"java.lang.Integer\",null)) sigma(tph(\"_AD\"),type(\"Matrix\",null)) sigma(tph(\"_AP\"),type(\"java.util.Vector\",params(type(\"java.lang.Integer\",null)))) sigma(tph(\"_R\"),type(\"java.lang.Boolean\",null)) sigma(tph(\"_BR\"),type(\"Object\",null)) sigma(tph(\"_ANO\"),type(\"java.lang.Integer\",null)) sigma(tph(\"_AB\"),type(\"Matrix\",null)) sigma(tph(\"_AM\"),type(\"java.util.Vector\",params(type(\"java.lang.Integer\",null))))\n";
+        Map<String,String> sigmas = SolutionParser.parse(solution);
+        for(var key : sigmas.keySet()){
+            System.out.println(key + " -> " + sigmas.get(key));
+        }
+    }
+    @Test
+    public void parseOneSigma(){
+        String solution = "sigma(tph(\"_AMY\"),type(\"java.lang.Integer\",null))";
+        System.out.println(solution);
+        Map<String,String> sigmas = SolutionParser.parse(solution);
+        for(var key : sigmas.keySet()){
+            System.out.println(key + " -> " + sigmas.get(key));
+        }
+    }
+
+    @Test
+    public void parseSolution(){
+        String solution ="sigma(tph(\"_O\"),type(\"C1\",null)) sigma(tph(\"_W\"),type(\"C2\",null)) sigma(tph(\"_AM\"),type(\"C1\",null)) sigma(tph(\"_BA\"),type(\"C1\",null)) sigma(tph(\"_AW\"),type(\"C1\",null)) sigma(tph(\"_AO\"),type(\"C1\",null)) sigma(tph(\"_AK\"),type(\"C1\",null)) sigma(tph(\"_AI\"),type(\"C1\",null)) sigma(tph(\"_AQ\"),type(\"C1\",null)) sigma(tph(\"_AY\"),type(\"C1\",null)) sigma(tph(\"_AE\"),type(\"C1\",null)) sigma(tph(\"_BC\"),type(\"C1\",null)) sigma(tph(\"_AU\"),type(\"C1\",null)) sigma(tph(\"_AS\"),type(\"C1\",null)) sigma(tph(\"_V\"),type(\"java.lang.Object\",null)) sigma(tph(\"_N\"),type(\"C1\",null)) sigma(tph(\"_AG\"),type(\"C1\",null)) sigma(tph(\"_AD\"),type(\"C1\",null))\n";
+        Map<String,String> sigmas = SolutionParser.parse(solution);
+        for(var key : sigmas.keySet()){
+            System.out.println(key + " -> " + sigmas.get(key));
+        }
+    }
+}

src/test/java/UnifyTest.java

@@ -1,14 +1,12 @@
-import de.dhbwstuttgart.typeinference.constraints.Constraint;
-import de.dhbwstuttgart.typeinference.constraints.ConstraintSet;
-import de.dhbwstuttgart.typeinference.constraints.Pair;
-import de.dhbwstuttgart.typeinference.unify.TypeUnify;
-import de.dhbwstuttgart.typeinference.unify.UnifyResultModel;
-import de.dhbwstuttgart.typeinference.unify.UnifyTaskModel;
-import de.dhbwstuttgart.typeinference.unify.interfaces.IFiniteClosure;
-import de.dhbwstuttgart.typeinference.unify.model.*;
+import de.dhbwstuttgart.input.ConstraintParser;
+import de.dhbwstuttgart.sat.asp.*;
 import org.apache.commons.io.output.NullWriter;
 import org.junit.Test;
 
+import java.io.File;
+import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.Paths;
 import java.util.ArrayList;
 import java.util.HashSet;
 
@@ -18,7 +16,885 @@ import java.util.Set;
 public class UnifyTest {
 
     public static final String rootDirectory = System.getProperty("user.dir")+"/resources/javFiles/";
+    @Test
+    public void generateConstraintSet(){
+        System.out.println(ASPGenerator.generateOrCons(generateOrConstraintTwoSolutions("test")));
+    }
 
+    @Test
+    public void parserTest(){
+        String input = "Boolean =. g," +
+                "t =. bc," +
+                "f <. e," +
+                "e =. bj," +
+                "Vector<Integer> <. r," +
+                "p <. l," +
+                "e <. Number,";
+        System.out.println(ASPGenerator.generateASP(ConstraintParser.parse(input)));
+    }
+
+
+    @Test
+    public void manyOrConstraints() throws IOException {
+        File resourcesDirectory = new File("src/test/data");
+        var consFile = Files.readString(new File(resourcesDirectory, "OrTestAllClassesWithAddMethod.cons").toPath());
+        System.out.println(ASPGenerator.generateASP(ConstraintParser.parse(consFile)));
+    }
+    @Test
+    public void sixOrConstraints() throws IOException {
+        File resourcesDirectory = new File("src/test/data");
+        var consFile = Files.readString(new File(resourcesDirectory, "OrTestAllClassesWith6AddMethods.cons").toPath());
+        System.out.println(ASPGenerator.generateASP(ConstraintParser.parse(consFile)));
+    }
+
+    @Test
+    public void manyOrConstraints2() throws IOException {
+        File resourcesDirectory = new File("src/test/data");
+        var consFile = Files.readString(new File(resourcesDirectory, "OrTestAllClassesWithAddMethod2.cons").toPath());
+        System.out.println(ASPGenerator.generateASP(ConstraintParser.parse(consFile)));
+    }
+
+    @Test
+    public void manyOrConstraintsConsecutiveCalls() throws IOException {
+        File resourcesDirectory = new File("src/test/data");
+        var consFile = Files.readString(new File(resourcesDirectory, "OrTestAllClassesWith3AddMethodsABCDCalls.cons").toPath());
+        System.out.println(ASPGenerator.generateASP(ConstraintParser.parse(consFile)));
+    }
+
+    @Test
+    public void extendsRelationParserTest(){
+        String input = "Matrix < Vector<Vector<Integer>>," +
+                "Vector<X> < List<X>," +
+                "MyPair<X,Y> < Pair<X,X>," +
+                "Pair<X,Y> < Object," +
+                "List<X> < Object";
+        System.out.println(ASPGenerator.generateExtendsRelations(ConstraintParser.parseExtendsRelations(input)));
+        //TODO: Finish Extends Relation parser
+    }
+
+    @Test
+    public void paperExample(){
+        String input = "Matrix < Vector<Vector<Integer>>," +
+                "Vector<X> < List<X>," +
+                "MyPair<X,Y> < Pair<X,X>," +
+                "Pair<X,Y> < Object," +
+                "List<X> < Object";
+        //System.out.println(ASPGenerator.generateExtendsRelations(ConstraintParser.parseExtendsRelations(input)));
+        String cons = "{List<Integer> <. _a | List<String> <. _a},\n List<_c> <. _b,\n _m <. _b,\n _m <. Matrix";
+        System.out.println(ASPGenerator.generateASP(ConstraintParser.parse(cons)));
+    }
+/*
+    @Test
+    public void orConsTest() throws IOException {
+        String input =
+                "java.lang.Boolean < java.lang.Object," +
+                        "java.lang.String < java.lang.Object," +
+                        "java.lang.Integer < java.lang.Object," +
+                        "OrConsTest < java.lang.Object," +
+                        "MyPair<X,Y> < Pair<X,X>," +
+                        "Pair<X,Y> < Object," +
+                        "List<X> < Object," +
+                        "Integer < Object, String < Object, " +
+                        Files.readString(Paths.get("/","tmp","output"));
+        System.out.println(ASPGenerator.generateASP(ConstraintParser.parse(input)));
+        System.out.println(ASPGenerator.generateExtendsRelations(ConstraintParser.parseExtendsRelations(input)));
+    }
+*/
+    @Test
+    public void alotOfOrConstraintsTest(){
+        String input =
+                "Vector<X> < List<X>," +
+                "MyPair<X,Y> < Pair<X,X>," +
+                "Pair<X,Y> < Object," +
+                "List<X> < Object," +
+                "Integer < Object, String < Object, " +
+                "{List<Integer> <. _a | List<String> <. _a}{List<_c> <. _b, String <. Object | List<_c> <. _b} {Vector<Integer> <. _b | Vector<String> <. _b}"+
+                "{List<Integer> <. _aa | List<String> <. _aa}{List<_c> <. _ba | List<_c> <. _ba} {Vector<Integer> <. _ba | Vector<String> <. _ba}"+
+                "{List<Integer> <. _aaa | List<String> <. _aaa}{List<_c> <. _baa | List<_c> <. _baa} {Vector<Integer> <. _baa | Vector<String> <. _baa}";
+
+        System.out.println(ASPGenerator.generateASP(ConstraintParser.parse(input)));
+        System.out.println(ASPGenerator.generateExtendsRelations(ConstraintParser.parseExtendsRelations(input)));
+    }
+
+    @Test
+    public void matrix(){
+        String input = "java.lang.Boolean < Object," +
+                "java.lang.Integer < java.lang.Number," +
+                "java.lang.Number < Object," + //TODO: Implement smaller
+                "java.util.Vector<X> < Object," +
+                "Matrix < java.util.Vector<java.util.Vector<java.lang.Integer>>\n" +
+                "_BE=.java.lang.Boolean\n" +
+                "java.util.Vector<java.util.Vector<java.lang.Integer>>=.java.util.Vector<_ANR>\n" +
+                "_AU<.java.lang.Number\n" +
+                "java.util.Vector<java.lang.Integer><._AS\n" +
+                "_AI=.Matrix\n" +
+                "_AF=._CK\n" +
+                "_AP<._AM\n" +
+                "_BC<.java.lang.Number\n" +
+                "java.util.Vector<java.util.Vector<java.lang.Integer>>=.java.util.Vector<_ANQ>\n" +
+                "_S=.Matrix\n" +
+                "_BD<._BC\n" +
+                "_AV<._AU\n" +
+                "_AU<.java.lang.Number\n" +
+                "_BV<._BA\n" +
+                "Matrix<._AD\n" +
+                "_J<.java.lang.Number\n" +
+                "java.lang.Boolean=._AH\n" +
+                "_V<.java.lang.Integer\n" +
+                "_AY<.java.lang.Number\n" +
+                "_BC=._BW\n" +
+                "_AK<.java.lang.Number\n" +
+                "_AH=.java.lang.Boolean\n" +
+                "_BC<.java.lang.Number\n" +
+                "_AQ=.Matrix\n" +
+                "_G<.java.lang.Integer\n" +
+                "java.lang.Integer<.java.lang.Number\n" +
+                "_AF<.java.lang.Number\n" +
+                "_AW=.java.lang.Boolean\n" +
+                "_BB<._BA\n" +
+                "java.lang.Boolean=._AW\n" +
+                "java.lang.Boolean=._H\n" +
+                "_H=.java.lang.Boolean\n" +
+                "_AD<._AB\n" +
+                "_AF<.java.lang.Number\n" +
+                "_BG<.java.lang.Number\n" +
+                "java.lang.Boolean=._BE\n" +
+                "_AU=._CD\n" +
+                "_AG<._AF\n" +
+                "{\n" +
+                "{\n" +
+                "Matrix<.Matrix\n" +
+                "_AE=.Matrix\n" +
+                "}\n" +
+                "}\n" +
+                "{\n" +
+                "{\n" +
+                "_AG=.java.lang.Integer\n" +
+                "}\n" +
+                "}\n" +
+                "{\n" +
+                "{\n" +
+                "_AI=.java.util.AbstractList<_AMV>\n" +
+                "java.lang.Integer<._AK\n" +
+                "}\n" +
+                "|{\n" +
+                "_AI=.Matrix\n" +
+                "java.lang.Integer<._AK\n" +
+                "}\n" +
+                "|{\n" +
+                "java.lang.Integer<._AK\n" +
+                "_AI=.java.util.List<_AMU>\n" +
+                "}\n" +
+                "|{\n" +
+                "_AI=.java.util.AbstractList<_AMV>\n" +
+                "java.lang.Integer<._AK\n" +
+                "}\n" +
+                "|{\n" +
+                "_AI=.java.util.Vector<_AMW>\n" +
+                "java.lang.Integer<._AK\n" +
+                "}\n" +
+                "|{\n" +
+                "_AI=.java.util.List<_AMU>\n" +
+                "java.lang.Integer<._AK\n" +
+                "}\n" +
+                "|{\n" +
+                "java.lang.Integer<._AK\n" +
+                "_AI=.java.util.Vector<_AMW>\n" +
+                "}\n" +
+                "|{\n" +
+                "_AI=.Matrix\n" +
+                "java.lang.Integer<._AK\n" +
+                "}\n" +
+                "}\n" +
+                "{\n" +
+                "{\n" +
+                "_AF<.java.lang.Integer\n" +
+                "_AQ=.java.util.Vector<_AMX>\n" +
+                "_AMX<._AP\n" +
+                "}\n" +
+                "|{\n" +
+                "_AF<.java.lang.Integer\n" +
+                "java.util.Vector<java.lang.Integer><._AP\n" +
+                "_AQ=.Matrix\n" +
+                "}\n" +
+                "|{\n" +
+                "_AF<.java.lang.Integer\n" +
+                "_AQ=.java.util.Vector<_AMX>\n" +
+                "_AMX<._AP\n" +
+                "}\n" +
+                "|{\n" +
+                "java.util.Vector<java.lang.Integer><._AP\n" +
+                "_AF<.java.lang.Integer\n" +
+                "_AQ=.Matrix\n" +
+                "}\n" +
+                "}\n" +
+                "{\n" +
+                "{\n" +
+                "_AT=.java.util.Vector<GE>\n" +
+                "java.util.Vector<_AMY><.java.util.Vector<java.lang.Integer>\n" +
+                "}\n" +
+                "}\n" +
+                "{\n" +
+                "{\n" +
+                "_AV=.java.lang.Integer\n" +
+                "}\n" +
+                "}\n" +
+                "{\n" +
+                "{\n" +
+                "_AM=.Matrix\n" +
+                "java.lang.Integer<._AY\n" +
+                "}\n" +
+                "|{\n" +
+                "java.lang.Integer<._AY\n" +
+                "_AM=.java.util.List<_AMZ>\n" +
+                "}\n" +
+                "|{\n" +
+                "java.lang.Integer<._AY\n" +
+                "_AM=.java.util.Vector<_ANB>\n" +
+                "}\n" +
+                "|{\n" +
+                "_AM=.java.util.List<_AMZ>\n" +
+                "java.lang.Integer<._AY\n" +
+                "}\n" +
+                "|{\n" +
+                "java.lang.Integer<._AY\n" +
+                "_AM=.java.util.AbstractList<_ANA>\n" +
+                "}\n" +
+                "|{\n" +
+                "_AM=.java.util.AbstractList<_ANA>\n" +
+                "java.lang.Integer<._AY\n" +
+                "}\n" +
+                "|{\n" +
+                "java.lang.Integer<._AY\n" +
+                "_AM=.Matrix\n" +
+                "}\n" +
+                "|{\n" +
+                "_AM=.java.util.Vector<_ANB>\n" +
+                "java.lang.Integer<._AY\n" +
+                "}\n" +
+                "}\n" +
+                "{\n" +
+                "{\n" +
+                "_BB=.java.lang.Integer\n" +
+                "}\n" +
+                "}\n" +
+                "{\n" +
+                "{\n" +
+                "_BD=.java.lang.Integer\n" +
+                "}\n" +
+                "}\n" +
+                "{\n" +
+                "{\n" +
+                "_AM=.java.util.Vector<_ANE>\n" +
+                "java.lang.Integer<._BG\n" +
+                "}\n" +
+                "|{\n" +
+                "_AM=.Matrix\n" +
+                "java.lang.Integer<._BG\n" +
+                "}\n" +
+                "|{\n" +
+                "_AM=.java.util.Vector<_ANE>\n" +
+                "java.lang.Integer<._BG\n" +
+                "}\n" +
+                "|{\n" +
+                "_AM=.java.util.AbstractList<_AND>\n" +
+                "java.lang.Integer<._BG\n" +
+                "}\n" +
+                "|{\n" +
+                "_AM=.Matrix\n" +
+                "java.lang.Integer<._BG\n" +
+                "}\n" +
+                "|{\n" +
+                "_AM=.java.util.List<_ANC>\n" +
+                "java.lang.Integer<._BG\n" +
+                "}\n" +
+                "|{\n" +
+                "_AM=.java.util.List<_ANC>\n" +
+                "java.lang.Integer<._BG\n" +
+                "}\n" +
+                "|{\n" +
+                "_AM=.java.util.AbstractList<_AND>\n" +
+                "java.lang.Integer<._BG\n" +
+                "}\n" +
+                "}\n" +
+                "{\n" +
+                "{\n" +
+                "_AM=.Matrix\n" +
+                "_BC<.java.lang.Integer\n" +
+                "java.util.Vector<java.lang.Integer><._BK\n" +
+                "}\n" +
+                "|{\n" +
+                "_AM=.Matrix\n" +
+                "java.util.Vector<java.lang.Integer><._BK\n" +
+                "_BC<.java.lang.Integer\n" +
+                "}\n" +
+                "|{\n" +
+                "_ANG<._BK\n" +
+                "_AM=.java.util.AbstractList<_ANG>\n" +
+                "_BC<.java.lang.Integer\n" +
+                "}\n" +
+                "|{\n" +
+                "_AM=.java.util.Vector<_ANH>\n" +
+                "_BC<.java.lang.Integer\n" +
+                "_ANH<._BK\n" +
+                "}\n" +
+                "|{\n" +
+                "_AM=.java.util.AbstractList<_ANG>\n" +
+                "_ANG<._BK\n" +
+                "_BC<.java.lang.Integer\n" +
+                "}\n" +
+                "|{\n" +
+                "_AM=.java.util.List<_ANF>\n" +
+                "_ANF<._BK\n" +
+                "_BC<.java.lang.Integer\n" +
+                "}\n" +
+                "|{\n" +
+                "_AM=.java.util.List<_ANF>\n" +
+                "_ANF<._BK\n" +
+                "_BC<.java.lang.Integer\n" +
+                "}\n" +
+                "|{\n" +
+                "_ANH<._BK\n" +
+                "_BC<.java.lang.Integer\n" +
+                "_AM=.java.util.Vector<_ANH>\n" +
+                "}\n" +
+                "}\n" +
+                "{\n" +
+                "{\n" +
+                "_ANI<._BR\n" +
+                "_AC=.java.util.List<_ANI>\n" +
+                "_BC<.java.lang.Integer\n" +
+                "}\n" +
+                "|{\n" +
+                "_AC=.Matrix\n" +
+                "java.util.Vector<java.lang.Integer><._BR\n" +
+                "_BC<.java.lang.Integer\n" +
+                "}\n" +
+                "|{\n" +
+                "_AC=.Matrix\n" +
+                "_BC<.java.lang.Integer\n" +
+                "java.util.Vector<java.lang.Integer><._BR\n" +
+                "}\n" +
+                "|{\n" +
+                "_ANJ<._BR\n" +
+                "_AC=.java.util.AbstractList<_ANJ>\n" +
+                "_BC<.java.lang.Integer\n" +
+                "}\n" +
+                "|{\n" +
+                "_BC<.java.lang.Integer\n" +
+                "_AC=.java.util.Vector<_ANK>\n" +
+                "_ANK<._BR\n" +
+                "}\n" +
+                "|{\n" +
+                "_AC=.java.util.Vector<_ANK>\n" +
+                "_BC<.java.lang.Integer\n" +
+                "_ANK<._BR\n" +
+                "}\n" +
+                "|{\n" +
+                "_BC<.java.lang.Integer\n" +
+                "_AC=.java.util.List<_ANI>\n" +
+                "_ANI<._BR\n" +
+                "}\n" +
+                "|{\n" +
+                "_AC=.java.util.AbstractList<_ANJ>\n" +
+                "_BC<.java.lang.Integer\n" +
+                "_ANJ<._BR\n" +
+                "}\n" +
+                "}\n" +
+                "{\n" +
+                "{\n" +
+                "_BR=.java.util.AbstractList<_ANM>\n" +
+                "_ANM<._BO\n" +
+                "_AU<.java.lang.Integer\n" +
+                "}\n" +
+                "|{\n" +
+                "java.util.Vector<java.lang.Integer><._BO\n" +
+                "_AU<.java.lang.Integer\n" +
+                "_BR=.Matrix\n" +
+                "}\n" +
+                "|{\n" +
+                "_AU<.java.lang.Integer\n" +
+                "_ANL<._BO\n" +
+                "_BR=.java.util.List<_ANL>\n" +
+                "}\n" +
+                "|{\n" +
+                "_AU<.java.lang.Integer\n" +
+                "_BR=.java.util.List<_ANL>\n" +
+                "_ANL<._BO\n" +
+                "}\n" +
+                "|{\n" +
+                "_ANN<._BO\n" +
+                "_BR=.java.util.Vector<_ANN>\n" +
+                "_AU<.java.lang.Integer\n" +
+                "}\n" +
+                "|{\n" +
+                "_ANM<._BO\n" +
+                "_AU<.java.lang.Integer\n" +
+                "_BR=.java.util.AbstractList<_ANM>\n" +
+                "}\n" +
+                "|{\n" +
+                "_ANN<._BO\n" +
+                "_BR=.java.util.Vector<_ANN>\n" +
+                "_AU<.java.lang.Integer\n" +
+                "}\n" +
+                "|{\n" +
+                "_BR=.Matrix\n" +
+                "java.util.Vector<java.lang.Integer><._BO\n" +
+                "_AU<.java.lang.Integer\n" +
+                "}\n" +
+                "}\n" +
+                "{\n" +
+                "{\n" +
+                "_BK<.java.lang.Integer\n" +
+                "java.lang.Integer=._BU\n" +
+                "_BO<.java.lang.Integer\n" +
+                "}\n" +
+                "}\n" +
+                "{\n" +
+                "{\n" +
+                "_BU<.java.lang.Integer\n" +
+                "_BA<.java.lang.Integer\n" +
+                "java.lang.Integer=._BV\n" +
+                "}\n" +
+                "}\n" +
+                "{\n" +
+                "{\n" +
+                "_BA<.java.util.Vector<java.lang.Integer>\n" +
+                "_AS=.Matrix\n" +
+                "}\n" +
+                "|{\n" +
+                "_AS=.Matrix\n" +
+                "_BA<.java.util.Vector<java.lang.Integer>\n" +
+                "}\n" +
+                "|{\n" +
+                "_BA<._ANO\n" +
+                "_AS=.java.util.Vector<_ANO>\n" +
+                "}\n" +
+                "|{\n" +
+                "_BA<._ANO\n" +
+                "_AS=.java.util.Vector<_ANO>\n" +
+                "}\n" +
+                "}\n" +
+                "{\n" +
+                "{\n" +
+                "_AS<.java.util.Vector<java.lang.Integer>\n" +
+                "_AD=.Matrix\n" +
+                "}\n" +
+                "|{\n" +
+                "_AS<._ANP\n" +
+                "_AD=.java.util.Vector<_ANP>\n" +
+                "}\n" +
+                "|{\n" +
+                "_AS<.java.util.Vector<java.lang.Integer>\n" +
+                "_AD=.Matrix\n" +
+                "}\n" +
+                "|{\n" +
+                "_AS<._ANP\n" +
+                "_AD=.java.util.Vector<_ANP>\n" +
+                "}\n" +
+                "}\n" +
+                "{\n" +
+                "{\n" +
+                "_G=.java.lang.Integer\n" +
+                "}\n" +
+                "}\n" +
+                "{\n" +
+                "{\n" +
+                "_F=.java.util.List<_ANS>\n" +
+                "java.lang.Integer<._J\n" +
+                "}\n" +
+                "|{\n" +
+                "_F=.java.util.AbstractList<_ANT>\n" +
+                "java.lang.Integer<._J\n" +
+                "}\n" +
+                "|{\n" +
+                "_F=.java.util.Vector<_ANU>\n" +
+                "java.lang.Integer<._J\n" +
+                "}\n" +
+                "|{\n" +
+                "_F=.Matrix\n" +
+                "java.lang.Integer<._J\n" +
+                "}\n" +
+                "|{\n" +
+                "java.lang.Integer<._J\n" +
+                "_F=.Matrix\n" +
+                "}\n" +
+                "|{\n" +
+                "java.lang.Integer<._J\n" +
+                "_F=.java.util.List<_ANS>\n" +
+                "}\n" +
+                "|{\n" +
+                "java.lang.Integer<._J\n" +
+                "_F=.java.util.Vector<_ANU>\n" +
+                "}\n" +
+                "|{\n" +
+                "java.lang.Integer<._J\n" +
+                "_F=.java.util.AbstractList<_ANT>\n" +
+                "}\n" +
+                "}\n" +
+                "{\n" +
+                "{\n" +
+                "_F=.java.util.Vector<_ANV>\n" +
+                "java.lang.Integer<.java.lang.Integer\n" +
+                "_ANV<._N\n" +
+                "}\n" +
+                "|{\n" +
+                "_F=.Matrix\n" +
+                "java.lang.Integer<.java.lang.Integer\n" +
+                "java.util.Vector<java.lang.Integer><._N\n" +
+                "}\n" +
+                "|{\n" +
+                "_ANV<._N\n" +
+                "java.lang.Integer<.java.lang.Integer\n" +
+                "_F=.java.util.Vector<_ANV>\n" +
+                "}\n" +
+                "|{\n" +
+                "_F=.Matrix\n" +
+                "java.lang.Integer<.java.lang.Integer\n" +
+                "java.util.Vector<java.lang.Integer><._N\n" +
+                "}\n" +
+                "}\n" +
+                "{\n" +
+                "{\n" +
+                "_F=.Matrix\n" +
+                "java.util.Vector<java.lang.Integer><._N\n" +
+                "java.lang.Integer<.java.lang.Integer\n" +
+                "}\n" +
+                "|{\n" +
+                "_F=.java.util.Vector<_ANX>\n" +
+                "java.lang.Integer<.java.lang.Integer\n" +
+                "_ANX<._N\n" +
+                "}\n" +
+                "|{\n" +
+                "_F=.java.util.Vector<_ANX>\n" +
+                "java.lang.Integer<.java.lang.Integer\n" +
+                "_ANX<._N\n" +
+                "}\n" +
+                "|{\n" +
+                "java.util.Vector<java.lang.Integer><._N\n" +
+                "_F=.Matrix\n" +
+                "java.lang.Integer<.java.lang.Integer\n" +
+                "}\n" +
+                "}\n" +
+                "{\n" +
+                "{\n" +
+                "java.util.Vector<java.lang.Integer><._N\n" +
+                "_F=.Matrix\n" +
+                "java.lang.Integer<.java.lang.Integer\n" +
+                "}\n" +
+                "|{\n" +
+                "java.util.Vector<java.lang.Integer><._N\n" +
+                "java.lang.Integer<.java.lang.Integer\n" +
+                "_F=.Matrix\n" +
+                "}\n" +
+                "|{\n" +
+                "_F=.java.util.Vector<_ANZ>\n" +
+                "_ANZ<._N\n" +
+                "java.lang.Integer<.java.lang.Integer\n" +
+                "}\n" +
+                "|{\n" +
+                "_F=.java.util.Vector<_ANZ>\n" +
+                "_ANZ<._N\n" +
+                "java.lang.Integer<.java.lang.Integer\n" +
+                "}\n" +
+                "}\n" +
+                "{\n" +
+                "{\n" +
+                "_F=.Matrix\n" +
+                "java.lang.Integer<.java.lang.Integer\n" +
+                "java.util.Vector<java.lang.Integer><._N\n" +
+                "}\n" +
+                "|{\n" +
+                "_AOB<._N\n" +
+                "java.lang.Integer<.java.lang.Integer\n" +
+                "_F=.java.util.Vector<_AOB>\n" +
+                "}\n" +
+                "|{\n" +
+                "_F=.java.util.Vector<_AOB>\n" +
+                "java.lang.Integer<.java.lang.Integer\n" +
+                "_AOB<._N\n" +
+                "}\n" +
+                "|{\n" +
+                "java.util.Vector<java.lang.Integer><._N\n" +
+                "java.lang.Integer<.java.lang.Integer\n" +
+                "_F=.Matrix\n" +
+                "}\n" +
+                "}\n" +
+                "{\n" +
+                "{\n" +
+                "_N<._AOA\n" +
+                "java.lang.Boolean<._R\n" +
+                "_S=.java.util.Vector<_AOA>\n" +
+                "}\n" +
+                "|{\n" +
+                "_N<._ANW\n" +
+                "java.lang.Boolean<._R\n" +
+                "_S=.java.util.List<_ANW>\n" +
+                "}\n" +
+                "|{\n" +
+                "_S=.java.util.List<_ANW>\n" +
+                "java.lang.Boolean<._R\n" +
+                "_N<._ANW\n" +
+                "}\n" +
+                "|{\n" +
+                "_N<._AOA\n" +
+                "java.lang.Boolean<._R\n" +
+                "_S=.java.util.Vector<_AOA>\n" +
+                "}\n" +
+                "|{\n" +
+                "_N<.java.util.Vector<java.lang.Integer>\n" +
+                "java.lang.Boolean<._R\n" +
+                "_S=.Matrix\n" +
+                "}\n" +
+                "|{\n" +
+                "java.lang.Boolean<._R\n" +
+                "_S=.Matrix\n" +
+                "_N<.java.util.Vector<java.lang.Integer>\n" +
+                "}\n" +
+                "|{\n" +
+                "java.lang.Boolean<._R\n" +
+                "_S=.java.util.AbstractList<_ANY>\n" +
+                "_N<._ANY\n" +
+                "}\n" +
+                "|{\n" +
+                "java.lang.Boolean<._R\n" +
+                "_S=.java.util.AbstractList<_ANY>\n" +
+                "_N<._ANY\n" +
+                "}\n" +
+                "}\n" +
+                "{\n" +
+                "{\n" +
+                "_U=.java.lang.Integer\n" +
+                "}\n" +
+                "}\n" +
+                "{\n" +
+                "{\n" +
+                "java.lang.Integer<.java.lang.Integer\n" +
+                "java.lang.Integer=._V\n" +
+                "_U<.java.lang.Integer\n" +
+                "}\n" +
+                "}\n";
+        System.out.println(ASPGenerator.generateASP(ConstraintParser.parse(input)));
+        System.out.println(ASPGenerator.generateExtendsRelations(ConstraintParser.parseExtendsRelations(input)));
+    }
+
+    @Test
+    public void matrix2k(){
+        //und-constraints
+        //T =. BC
+        //java.lang.Boolean =. G
+        //G =. java.lang.Boolean
+        //F <. E
+        //E =. BJ
+        //Vector<java.lang.Integer> <. R
+        //P <. L
+        //E <!=. java.lang.Number
+        //C =. A
+        //M =. Matrix
+        //AC <. AB
+        //Matrix <. C
+        //AB =. AV
+        //X <!=. java.lang.Number
+        //java.lang.Boolean =. AD
+        //AU <. Z
+        //AD =. java.lang.Boolean
+        //H =. Matrix
+        //AA <. Z
+        //AB <!=. java.lang.Number
+        //V =. java.lang.Boolean
+        //java.lang.Boolean =. V
+        //J <!=. java.lang.Number
+        //oder-constraints
+        //set #1
+        //Matrix <. Matrix
+        //set #2
+        //F =. java.lang.Float
+        //F =. java.lang.Integer
+        //set #3
+        //H =. ? extends Matrix
+        //java.lang.Integer =. J
+        //H =. Vector<ALB>
+        //java.lang.Integer =. J
+        //H =. Matrix
+        //java.lang.Integer =. J
+        //H =. ? extends Vector<ALB>
+        //java.lang.Integer =. J
+        //set #4
+        //ALC =. P
+        //M =. Vector<ALC>
+        //E <. java.lang.Integer
+        //Vector<java.lang.Integer> =. P
+        //M =. ? extends Matrix
+        //E <. java.lang.Integer
+        //Vector<java.lang.Integer> =. P
+        //M =. Matrix
+        //E <. java.lang.Integer
+        //ALC =. P
+        //M =. ? extends Vector<ALC>
+        //E <. java.lang.Integer
+        //set #5
+        //Vector<ALD> <. Vector<java.lang.Integer>
+        //set #6
+        //U =. java.lang.Float
+        //U =. java.lang.Integer
+        //set #7
+        //L =. ? extends Matrix
+        //java.lang.Integer =. X
+        //L =. ? extends Vector<AMH>
+        //java.lang.Integer =. X
+        //L =. Matrix
+        //java.lang.Integer =. X
+        //L =. Vector<AMH>
+        //java.lang.Integer =. X
+        //set #8
+        //AA =. java.lang.Float
+        //AA =. java.lang.Integer
+        //set #9
+        //AC =. java.lang.Integer
+        //AC =. java.lang.Float
+        //set #10
+        //L =. ? extends Matrix
+        //java.lang.Integer =. AF
+        //L =. ? extends Vector<ANL>
+        //java.lang.Integer =. AF
+        //L =. Matrix
+        //java.lang.Integer =. AF
+        //L =. Vector<ANL>
+        //java.lang.Integer =. AF
+        //set #11
+        //Vector<java.lang.Integer> =. AJ
+        //L =. Matrix
+        //AB <. java.lang.Integer
+        //ANM =. AJ
+        //L =. ? extends Vector<ANM>
+        //AB <. java.lang.Integer
+        //Vector<java.lang.Integer> =. AJ
+        //L =. ? extends Matrix
+        //AB <. java.lang.Integer
+        //ANM =. AJ
+        //L =. Vector<ANM>
+        //AB <. java.lang.Integer
+        //set #12
+        //AB <. java.lang.Integer
+        //Vector<java.lang.Integer> =. AN
+        //B =. Matrix
+        //ANN =. AN
+        //AB <. java.lang.Integer
+        //B =. ? extends Vector<ANN>
+        //B =. Vector<ANN>
+        //ANN =. AN
+        //AB <. java.lang.Integer
+        //B =. ? extends Matrix
+        //AB <. java.lang.Integer
+        //Vector<java.lang.Integer> =. AN
+        //set #13
+        //Vector<java.lang.Integer> =. AR
+        //AN =. ? extends Matrix
+        //T <. java.lang.Integer
+        //AN =. ? extends Vector<ANO>
+        //ANO =. AR
+        //T <. java.lang.Integer
+        //AN =. Vector<ANO>
+        //ANO =. AR
+        //T <. java.lang.Integer
+        //AN =. Matrix
+        //Vector<java.lang.Integer> =. AR
+        //T <. java.lang.Integer
+        //set #14
+        //java.lang.Integer =. AT
+        //AJ <. java.lang.Integer
+        //AR <. java.lang.Integer
+
+
+    }
+
+    @Test
+    public void matrixTestBasic(){
+        /*
+        //und-constraints
+        //Matrix <. ret
+        //Integer <. i
+        //Matrix <. Vector<x?>
+        //x? <. v1
+        //i <. Integer
+        //Vector<Integer> <. v2
+        //v1 <. Vector<y?>
+        //m <. Vector<z?>
+        //z? <. zr
+        //zr <. Vector<z2?>
+        //z2? <. z2r
+        //z2r <. Integer
+        //v1 <. Vector<y2?>
+        //y2? <. y2r
+        //y2r <. Integer
+         */
+        HashSet<Pair> cons = new HashSet<>();
+        //v2 <. x2r
+        cons.add(new LessDot(new TypePlaceholder("v2"), new TypePlaceholder("x2r")));
+        //x2? <. x2r
+        cons.add(new LessDot(new TypePlaceholder("x2"), new TypePlaceholder("x2r")));
+        //ret <. Vector<x2?>
+        cons.add(new LessDot(new TypePlaceholder("ret"), new NamedType("Vector", List.of(new TypePlaceholder("x2")))));
+        //v2 <. Vector<x3?>
+        cons.add(new LessDot(new TypePlaceholder("v2"), new NamedType("Vector", List.of(new TypePlaceholder("x3")))));
+        //x3? <. x3r
+        cons.add(new LessDot(new TypePlaceholder("x3"), new TypePlaceholder("x3r")));
+        //Integer <. x3r
+        cons.add(new LessDot(new NamedType("Integer", List.of()), new TypePlaceholder("x3r")));
+
+        //Matrix <. ret
+        cons.add(new LessDot(new NamedType("Matrix", List.of()), new TypePlaceholder("ret")));
+        //Integer <. i
+        cons.add(new LessDot(new NamedType("Integer", List.of()), new TypePlaceholder("i")));
+        //Matrix <. Vector<x?>
+        cons.add(new LessDot(new NamedType("Matrix", List.of()), new NamedType("Vector", List.of(new TypePlaceholder("x")))));
+        //x? <. v1
+        cons.add(new LessDot(new TypePlaceholder("x"), new TypePlaceholder("v1")));
+        //i <. Integer
+        cons.add(new LessDot(new TypePlaceholder("i"), new NamedType("Integer", List.of())));
+        //Vector<Integer> <. v2
+        cons.add(new LessDot(new NamedType("Vector", List.of(new NamedType("Integer", List.of()))), new TypePlaceholder("v2")));
+        //v1 <. Vector<y?>
+        cons.add(new LessDot(new TypePlaceholder("v1"), new NamedType("Vector", List.of(new TypePlaceholder("y")))));
+        //m <. Vector<z?>
+        cons.add(new LessDot(new TypePlaceholder("m"), new NamedType("Vector", List.of(new TypePlaceholder("z")))));
+        //z? <. zr
+        cons.add(new LessDot(new TypePlaceholder("z"), new TypePlaceholder("zr")));
+        //zr <. Vector<z2?>
+        cons.add(new LessDot(new TypePlaceholder("z"), new TypePlaceholder("zr")));
+        //z2? <. z2r
+        //z2r <. Integer
+        //v1 <. Vector<y2?>
+        //y2? <. y2r
+        //y2r <. Integer
+        cons.add(new LessDot(new TypePlaceholder("z2"), new TypePlaceholder("z2r")));  // z2? <. z2r
+        cons.add(new LessDot(new TypePlaceholder("z2r"), new NamedType("Integer", List.of())));  // z2r <. Integer
+        cons.add(new LessDot(new TypePlaceholder("v1"), new NamedType("Vector", List.of(new TypePlaceholder("y2")))));  // v1 <. Vector<y2?>
+        cons.add(new LessDot(new TypePlaceholder("y2"), new TypePlaceholder("y2r")));  // y2? <. y2r
+        cons.add(new LessDot(new TypePlaceholder("y2r"), new NamedType("Integer", List.of())));  // y2r <. Integer
+        for(Pair p : cons){
+            System.out.println(p.toASP() + ".");
+        }
+        System.out.println(ASPGenerator.generateUndCons(cons));
+    }
+
+    private List<Set<Pair>> generateOrConstraintTwoSolutions(String name){
+        return List.of(genOrConstraintWithOneSolution(name+"1"), genOrConstraintWithOneSolution(name+"2"));
+    }
+    private Set<Pair> genOrConstraintWithOneSolution(String name){
+        Type type1 = new TypePlaceholder(name);
+        Type type2 = new NamedType("List", List.of(new NamedType("Integer", List.of())));
+        Pair pair1 = new LessDot(type2, type1);
+
+        type1 = new TypePlaceholder(name);
+        type2 = new NamedType("List", List.of(new TypePlaceholder(name+"2")));
+        Pair pair2 = new LessDot(type1, type2);
+        Set<Pair> undCons2 = Set.of(pair1, pair2);
+
+        return undCons2;
+    }
+
+    /*
     private UnifyPair genPairListOfInteger(String name){
 
         UnifyType type1 = new PlaceholderType(name);
@@ -76,13 +952,12 @@ public class UnifyTest {
 
         TypeUnify unifyAlgo = new TypeUnify();
         ConstraintSet<Pair> cons = new ConstraintSet<>();
-        UnifyResultModel urm = new UnifyResultModel(cons, finiteClosure);
-        UnifyTaskModel tasks = new UnifyTaskModel();
+        UnifyResultModelParallel urm = new UnifyResultModelParallel(cons, finiteClosure);
+        UnifyTaskModelParallel tasks = new UnifyTaskModelParallel();
         Set<Set<UnifyPair>> solution = unifyAlgo.unify(undConstraints, oderConstraints, finiteClosure, new NullWriter(), false, urm, tasks);
         System.out.println(solution.size());
         //System.out.println(solution);
     }
-
     @Test
     public void basicMatrixTest(){
         UnifyType type1;
@@ -185,7 +1060,7 @@ public class UnifyTest {
         type2 = new ReferenceType("Vector", new TypeParams(new ReferenceType("Vector", new TypeParams(new ReferenceType("Integer")))));
         constraints.add(new UnifyPair(type1, type2, PairOperator.SMALLER));
         //Vector<X> extends Object
-        type1 = new ReferenceType("Vector", new TypeParams(new ReferenceType("X")));
+        type1 = new ReferenceType("Vector", new TypeParams(new PlaceholderType("X")));
         type2 = new ReferenceType("Object");
         constraints.add(new UnifyPair(type1, type2, PairOperator.SMALLER));
         //Integer extends Object
@@ -196,8 +1071,8 @@ public class UnifyTest {
 
         TypeUnify unifyAlgo = new TypeUnify();
         ConstraintSet< Pair> cons = new ConstraintSet<>();
-        UnifyResultModel urm = new UnifyResultModel(cons, finiteClosure);
-        UnifyTaskModel tasks = new UnifyTaskModel();
+        UnifyResultModelParallel urm = new UnifyResultModelParallel(cons, finiteClosure);
+        UnifyTaskModelParallel tasks = new UnifyTaskModelParallel();
         Set<Set<UnifyPair>> solution = unifyAlgo.unify(undConstraints, oderConstraints, finiteClosure, new NullWriter(), false, urm, tasks);
         System.out.println(solution.size());
     }
@@ -672,8 +1547,8 @@ public class UnifyTest {
         FiniteClosure finiteClosure = new FiniteClosure(fcConstraints, new NullWriter());
         TypeUnify unifyAlgo = new TypeUnify();
         ConstraintSet< Pair> cons = new ConstraintSet<>();
-        UnifyResultModel urm = new UnifyResultModel(cons, finiteClosure);
-        UnifyTaskModel tasks = new UnifyTaskModel();
+        UnifyResultModelParallel urm = new UnifyResultModelParallel(cons, finiteClosure);
+        UnifyTaskModelParallel tasks = new UnifyTaskModelParallel();
         Set<Set<UnifyPair>> solution = unifyAlgo.unify(undConstraints, oderConstraints, finiteClosure, new NullWriter(), false, urm, tasks);
         System.out.println(solution.size());
     }
@@ -1233,8 +2108,8 @@ public class UnifyTest {
         FiniteClosure finiteClosure = new FiniteClosure(fcConstraints, new NullWriter());
         TypeUnify unifyAlgo = new TypeUnify();
         ConstraintSet< Pair> cons = new ConstraintSet<>();
-        UnifyResultModel urm = new UnifyResultModel(cons, finiteClosure);
-        UnifyTaskModel tasks = new UnifyTaskModel();
+        UnifyResultModelParallel urm = new UnifyResultModelParallel(cons, finiteClosure);
+        UnifyTaskModelParallel tasks = new UnifyTaskModelParallel();
         Set<Set<UnifyPair>> solution = unifyAlgo.unify(undConstraints, oderConstraints, finiteClosure, new NullWriter(), false, urm, tasks);
         System.out.println(solution.size());
     }
@@ -1342,7 +2217,7 @@ public class UnifyTest {
         //oder-constraints
         List<Set<Constraint<UnifyPair>>> oderConstraints = new ArrayList<>();
         Set<Constraint<UnifyPair>> constraints = new HashSet<>();
-        Constraint<UnifyPair> constraint = new Constraint<>();
+        HashSet<UnifyPair> constraint = new HashSet<>();
 
         //set #1
         constraints = new HashSet<>();
@@ -1417,7 +2292,7 @@ public class UnifyTest {
         //set #4
         constraints = new HashSet<>();
         //ALC =. P
-        constraint = new Constraint<>();
+        constraint = new HashSet<UnifyPair>();
         type1 = new PlaceholderType("ALC");
         type2 = new PlaceholderType("P");
         constraint.add(new UnifyPair(type1, type2, PairOperator.EQUALSDOT));
@@ -2096,12 +2971,8 @@ public class UnifyTest {
         fcConstraints.add(new UnifyPair(type1, type2, PairOperator.SMALLER));
 
         FiniteClosure finiteClosure = new FiniteClosure(fcConstraints, new NullWriter());
-        TypeUnify unifyAlgo = new TypeUnify();
-        ConstraintSet< Pair> cons = new ConstraintSet<>();
-        UnifyResultModel urm = new UnifyResultModel(cons, finiteClosure);
-        UnifyTaskModel tasks = new UnifyTaskModel();
-        Set<Set<UnifyPair>> solution = unifyAlgo.unify(undConstraints, oderConstraints, finiteClosure, new NullWriter(), false, urm, tasks);
-        System.out.println(solution.size());
+        ASPGenerator.generateASP(undConstraints);
     }
+    */
 }