reworked tests with UnifyResultModelParallel

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

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

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

@@ -3,16 +3,12 @@ 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 {
@@ -28,9 +24,10 @@ public class TypeUnify {
 	 * @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) {
+	public Set<Set<UnifyPair>> unify(Set<UnifyPair> undConstrains, List<Set<Constraint<UnifyPair>>> oderConstraints, IFiniteClosure fc, Writer logFile, Boolean log, UnifyResultModelParallel ret, UnifyTaskModel usedTasks) {
+		ForkJoinPool pool = new ForkJoinPool(Runtime.getRuntime().availableProcessors(), ForkJoinPool.defaultForkJoinWorkerThreadFactory, null, true);
+		ret.setPool(pool);
 		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 {
@@ -54,9 +51,10 @@ public class TypeUnify {
 	 * @param ret
 	 * @return
 	 */
-	public UnifyResultModel unifyAsync(Set<UnifyPair> undConstrains, List<Set<Constraint<UnifyPair>>> oderConstraints, IFiniteClosure fc, Writer logFile, Boolean log, UnifyResultModel ret, UnifyTaskModel usedTasks) {
+	public UnifyResultModelParallel unifyAsync(Set<UnifyPair> undConstrains, List<Set<Constraint<UnifyPair>>> oderConstraints, IFiniteClosure fc, Writer logFile, Boolean log, UnifyResultModelParallel ret, UnifyTaskModel usedTasks) {
+		ForkJoinPool pool = new ForkJoinPool(Runtime.getRuntime().availableProcessors(), ForkJoinPool.defaultForkJoinWorkerThreadFactory, null, true);
+		ret.setPool(pool);
 		TypeUnifyTask unifyTask = new TypeUnifyTask(undConstrains, oderConstraints, fc, true, logFile, log, 0, ret, usedTasks);
-		ForkJoinPool pool = new ForkJoinPool();
 		pool.invoke(unifyTask);
 		return ret;
 	}
@@ -72,10 +70,11 @@ public class TypeUnify {
 	 * @param ret
 	 * @return
 	 */
-	public UnifyResultModel unifyParallel(Set<UnifyPair> undConstrains, List<Set<Constraint<UnifyPair>>> oderConstraints, IFiniteClosure fc, Writer logFile, Boolean log, UnifyResultModel ret, UnifyTaskModel usedTasks) {
+	public UnifyResultModelParallel unifyParallel(Set<UnifyPair> undConstrains, List<Set<Constraint<UnifyPair>>> oderConstraints, IFiniteClosure fc, Writer logFile, Boolean log, UnifyResultModelParallel ret, UnifyTaskModel usedTasks) {
+		ForkJoinPool pool = new ForkJoinPool(Runtime.getRuntime().availableProcessors(), ForkJoinPool.defaultForkJoinWorkerThreadFactory, null, true);
+		ret.setPool(pool);
 		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 {
@@ -108,7 +107,7 @@ public class TypeUnify {
 	 * @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) {
+	public Set<Set<UnifyPair>> unifyOderConstraints(Set<UnifyPair> undConstrains, List<Set<Constraint<UnifyPair>>> oderConstraints, IFiniteClosure fc, Writer logFile, Boolean log, UnifyResultModelParallel 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();

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

@@ -23,13 +23,13 @@ public class TypeUnify2Task extends TypeUnifyTask {
        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, 
+    		   IFiniteClosure fc, boolean parallel, Writer logFile, Boolean log, int rekTiefe, UnifyResultModelParallel 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) {
+       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, UnifyResultModelParallel urm, UnifyTaskModel usedTasks, Set<UnifyPair> methodSignatureConstraintUebergabe) {
                super(eq, oderConstraints, fc, parallel, logFile, log, rekTiefe, urm, usedTasks);
                this.setToFlatten = setToFlatten;
                this.nextSetElement = nextSetElement;

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

@@ -73,12 +73,10 @@ public class TypeUnifyTask extends RecursiveTask<Set<Set<UnifyPair>>>  {
 	/**
 	 * Fuer die Threads
 	 */
-	UnifyResultModel urm;
-	protected static int noOfThread = 0;
+	UnifyResultModelParallel urm;
 	private static int totalnoOfThread = 0;
 	int thNo;
 	protected boolean one = false;
-	Integer MaxNoOfThreads = 128;
 
 	public static final String rootDirectory = System.getProperty("user.dir")+"/test/logFiles/";
 	Writer logFile;
@@ -152,11 +150,11 @@ public class TypeUnifyTask extends RecursiveTask<Set<Set<UnifyPair>>>  {
 	*/
 	
 	//statistics
-	public TypeUnifyTask(Set<UnifyPair> eq, List<Set<Constraint<UnifyPair>>> oderConstraints, IFiniteClosure fc, boolean parallel, Writer logFile, Boolean log, int rekTiefe, UnifyResultModel urm, UnifyTaskModel usedTasks, Writer statistics) {
+	public TypeUnifyTask(Set<UnifyPair> eq, List<Set<Constraint<UnifyPair>>> oderConstraints, IFiniteClosure fc, boolean parallel, Writer logFile, Boolean log, int rekTiefe, UnifyResultModelParallel urm, UnifyTaskModel usedTasks, Writer statistics) {
 		this(eq,oderConstraints,  fc,  parallel,  logFile,  log,  rekTiefe,  urm,  usedTasks);
 		this.statistics = statistics;
 	}
-	public TypeUnifyTask(Set<UnifyPair> eq, List<Set<Constraint<UnifyPair>>> oderConstraints, IFiniteClosure fc, boolean parallel, Writer logFile, Boolean log, int rekTiefe, UnifyResultModel urm, UnifyTaskModel usedTasks) {
+	public TypeUnifyTask(Set<UnifyPair> eq, List<Set<Constraint<UnifyPair>>> oderConstraints, IFiniteClosure fc, boolean parallel, Writer logFile, Boolean log, int rekTiefe, UnifyResultModelParallel urm, UnifyTaskModel usedTasks) {
 		synchronized (this) {
             if(statistics==null){
                 statistics = new NullWriter();
@@ -179,8 +177,7 @@ public class TypeUnifyTask extends RecursiveTask<Set<Set<UnifyPair>>>  {
 			this.parallel = parallel;
 			this.logFile = logFile;
 			this.log = log;
-			
-			noOfThread++; 
+
 			totalnoOfThread++;
 			//writeLog("thNo1 " + thNo);
 			thNo = totalnoOfThread;
@@ -269,7 +266,6 @@ public class TypeUnifyTask extends RecursiveTask<Set<Set<UnifyPair>>>  {
 				.filter(x -> x.size()>1)
 				.collect(Collectors.toCollection(ArrayList::new));
 		Set<Set<UnifyPair>> res = unify(neweq, remainingOderconstraints, fc, parallel, rekTiefeField, new HashSet<>());
-		noOfThread--;
 		try {
 			logFile.close();
 		}
@@ -2262,7 +2258,6 @@ public class TypeUnifyTask extends RecursiveTask<Set<Set<UnifyPair>>>  {
 		if (log && finalresult) {
 			try {
 				logFile.write("Thread no.:" + thNo + "\n");
-				logFile.write("noOfThread:" + noOfThread + "\n");
 				logFile.write("parallel:" + parallel + "\n");
 				logFile.write(str+"\n\n");
 				logFile.flush();

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/UnifyResultModelParallel.java

@@ -0,0 +1,51 @@
+package de.dhbwstuttgart.typeinference.unify;
+
+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.PairOperator;
+import de.dhbwstuttgart.typeinference.unify.model.UnifyPair;
+
+import java.util.*;
+import java.util.concurrent.ForkJoinPool;
+import java.util.stream.Collectors;
+
+public class UnifyResultModelParallel {
+    private ForkJoinPool pool;
+    private ConstraintSet<Pair> cons;
+    private IFiniteClosure fc;
+    private List<IUnifyResultListener> listeners = new ArrayList<>();
+
+    public UnifyResultModelParallel(ConstraintSet<Pair> cons, IFiniteClosure fc){
+        this.cons = cons;
+        this.fc = fc;
+    }
+
+    public void setPool(ForkJoinPool pool){
+        this.pool = pool;
+    }
+    public void addUnifyResultListener(IUnifyResultListener listenerToAdd) {
+        listeners.add(listenerToAdd);
+    }
+    public void removeUnifyResultListener(IUnifyResultListener listenerToRemove) {
+        listeners.remove(listenerToRemove);
+    }
+    public void notify(Set<Set<UnifyPair>> eqPrimePrimeSet){
+        pool.execute(()->{
+            Set<Set<UnifyPair>> eqPrimePrimeSetRet = eqPrimePrimeSet.stream().map(x -> {
+                Optional<Set<UnifyPair>> res = new RuleSet().subst(x.stream().map(y -> {
+                    if (y.getPairOp() == PairOperator.SMALLERDOTWC) y.setPairOp(PairOperator.EQUALSDOT);
+                    return y; //alle Paare a <.? b erden durch a =. b ersetzt
+                }).collect(Collectors.toCollection(HashSet::new)));
+                if (res.isPresent()) {//wenn subst ein Erg liefert wurde was veraendert
+                    return new TypeUnifyTask().applyTypeUnificationRules(res.get(), fc);
+                }
+                else return x; //wenn nichts veraendert wurde wird x zurueckgegeben
+            }).collect(Collectors.toCollection(HashSet::new));
+
+            for (IUnifyResultListener listener : listeners) {
+                listener.onNewTypeResultFound(eqPrimePrimeSetRet);
+            }
+        });
+    }
+}

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

@@ -1,13 +1,10 @@
 package de.dhbwstuttgart.typeinference.unify.model;
 
-import java.io.File;
-import java.io.FileWriter;
 import java.util.ArrayList;
 import java.util.Collection;
-import java.util.HashMap;
-import java.util.HashSet;
 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;
@@ -23,7 +20,7 @@ public final class PlaceholderType extends UnifyType{
 	 * Static list containing the names of all existing placeholders.
 	 * Used for generating fresh placeholders.
 	 */
-	public static final ArrayList<String> EXISTING_PLACEHOLDERS = new ArrayList<String>();
+	public static final Set<String> EXISTING_PLACEHOLDERS = ConcurrentHashMap.newKeySet();
 	
 	/**
 	 * Prefix of auto-generated placeholder names.
@@ -96,7 +93,7 @@ public final class PlaceholderType extends UnifyType{
 	 * A user could later instantiate a type using the same name that is equivalent to this type.
 	 * @return A fresh placeholder type.
 	 */
-	public synchronized static PlaceholderType freshPlaceholder() {
+	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)) {

src/test/java/UnifyTest.java

@@ -2,7 +2,7 @@ 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.UnifyResultModelParallel;
 import de.dhbwstuttgart.typeinference.unify.UnifyTaskModel;
 import de.dhbwstuttgart.typeinference.unify.interfaces.IFiniteClosure;
 import de.dhbwstuttgart.typeinference.unify.model.*;
@@ -76,10 +76,606 @@ public class UnifyTest {
 
         TypeUnify unifyAlgo = new TypeUnify();
         ConstraintSet<Pair> cons = new ConstraintSet<>();
-        UnifyResultModel urm = new UnifyResultModel(cons, finiteClosure);
+        UnifyResultModelParallel urm = new UnifyResultModelParallel(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());
         //System.out.println(solution);
-    }}
+    }
+
+    @Test
+    public void basicMatrixTest(){
+        UnifyType type1;
+        UnifyType type2;
+        Set<UnifyPair> undConstraints = new HashSet<>();
+
+        //und-constraints
+        //Matrix <. ret
+        type1 = new ReferenceType("Matrix");
+        type2 = new PlaceholderType("ret");
+        undConstraints.add(new UnifyPair(type1, type2, PairOperator.SMALLERDOT));
+        //Integer <. i
+        type1 = new ReferenceType("Integer");
+        type2 = new PlaceholderType("i");
+        undConstraints.add(new UnifyPair(type1, type2, PairOperator.SMALLERDOT));
+        //Matrix <. Vector<x?>
+        type1 = new ReferenceType("Matrix");
+        type2 = new ReferenceType("Vector", new TypeParams(new PlaceholderType("x")));
+        undConstraints.add(new UnifyPair(type1, type2, PairOperator.SMALLERDOT));
+        //x? <. v1
+        type1 = new PlaceholderType("x");
+        type2 = new PlaceholderType("v1");
+        undConstraints.add(new UnifyPair(type1, type2, PairOperator.SMALLERDOT));
+        //i <. Integer
+        type1 = new PlaceholderType("i");
+        type2 = new ReferenceType("Integer");
+        undConstraints.add(new UnifyPair(type1, type2, PairOperator.SMALLERDOT));
+        //Vector<Integer> <. v2
+        type1 = new ReferenceType("Vector", new TypeParams(new ReferenceType("Integer")));
+        type2 = new PlaceholderType("v2");
+        undConstraints.add(new UnifyPair(type1, type2, PairOperator.SMALLERDOT));
+        //v1 <. Vector<y?>
+        type1 = new PlaceholderType("v1");
+        type2 = new ReferenceType("Vector", new TypeParams(new PlaceholderType("y")));
+        undConstraints.add(new UnifyPair(type1, type2, PairOperator.SMALLERDOT));
+        //m <. Vector<z?>
+        type1 = new PlaceholderType("m");
+        type2 = new ReferenceType("Vector", new TypeParams(new PlaceholderType("z")));
+        undConstraints.add(new UnifyPair(type1, type2, PairOperator.SMALLERDOT));
+        //z? <. zr
+        type1 = new PlaceholderType("z");
+        type2 = new PlaceholderType("zr");
+        undConstraints.add(new UnifyPair(type1, type2, PairOperator.SMALLERDOT));
+        //zr <. Vector<z2?>
+        type1 = new PlaceholderType("zr");
+        type2 = new ReferenceType("Vector", new TypeParams(new PlaceholderType("z2")));
+        undConstraints.add(new UnifyPair(type1, type2, PairOperator.SMALLERDOT));
+        //z2? <. z2r
+        type1 = new PlaceholderType("z2");
+        type2 = new PlaceholderType("z2r");
+        undConstraints.add(new UnifyPair(type1, type2, PairOperator.SMALLERDOT));
+        //z2r <. Integer
+        type1 = new PlaceholderType("z2r");
+        type2 = new ReferenceType("Integer");
+        undConstraints.add(new UnifyPair(type1, type2, PairOperator.SMALLERDOT));
+        //v1 <. Vector<y2?>
+        type1 = new PlaceholderType("v1");
+        type2 = new ReferenceType("Vector", new TypeParams(new PlaceholderType("y2")));
+        undConstraints.add(new UnifyPair(type1, type2, PairOperator.SMALLERDOT));
+        //y2? <. y2r
+        type1 = new PlaceholderType("y2");
+        type2 = new PlaceholderType("y2r");
+        undConstraints.add(new UnifyPair(type1, type2, PairOperator.SMALLERDOT));
+        //y2r <. Integer
+        type1 = new PlaceholderType("y2r");
+        type2 = new ReferenceType("Integer");
+        undConstraints.add(new UnifyPair(type1, type2, PairOperator.SMALLERDOT));
+        //v2 <. Vector<x3?>
+        type1 = new PlaceholderType("v2");
+        type2 = new ReferenceType("Vector", new TypeParams(new PlaceholderType("x3")));
+        undConstraints.add(new UnifyPair(type1, type2, PairOperator.SMALLERDOT));
+        //x3? <. x3r
+        type1 = new PlaceholderType("x3");
+        type2 = new PlaceholderType("x3r");
+        undConstraints.add(new UnifyPair(type1, type2, PairOperator.SMALLERDOT));
+        //Integer <. x3r
+        type1 = new ReferenceType("Integer");
+        type2 = new PlaceholderType("x3r");
+        undConstraints.add(new UnifyPair(type1, type2, PairOperator.SMALLERDOT));
+        //ret <. Vector<x2?>
+        type1 = new PlaceholderType("ret");
+        type2 = new ReferenceType("Vector", new TypeParams(new PlaceholderType("x2")));
+        undConstraints.add(new UnifyPair(type1, type2, PairOperator.SMALLERDOT));
+        //x2? <. x2r
+        type1 = new PlaceholderType("x2");
+        type2 = new PlaceholderType("x2r");
+        undConstraints.add(new UnifyPair(type1, type2, PairOperator.SMALLERDOT));
+        //v2 <. x2r
+        type1 = new PlaceholderType("v2");
+        type2 = new PlaceholderType("x2r");
+        undConstraints.add(new UnifyPair(type1, type2, PairOperator.SMALLERDOT));
+
+        //oder-constraints
+        List<Set<Constraint<UnifyPair>>> oderConstraints = new ArrayList<>();
+
+        //FiniteClosure
+        Set<UnifyPair> constraints = new HashSet<>();
+        //Matrix extends Vector<Vector<Integer>>
+        type1 = new ReferenceType("Matrix");
+        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")));
+        type2 = new ReferenceType("Object");
+        constraints.add(new UnifyPair(type1, type2, PairOperator.SMALLER));
+        //Integer extends Object
+        type1 = new ReferenceType("Integer");
+        type2 = new ReferenceType("Object");
+        constraints.add(new UnifyPair(type1, type2, PairOperator.SMALLER));
+        FiniteClosure finiteClosure = new FiniteClosure(constraints, new NullWriter());
+
+        TypeUnify unifyAlgo = new TypeUnify();
+        ConstraintSet< Pair> cons = new ConstraintSet<>();
+        UnifyResultModelParallel urm = new UnifyResultModelParallel(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());
+    }
+
+    @Test
+    public void scalark2(){
+        UnifyType type1;
+        UnifyType type2;
+
+        //und-constraints
+        Set<UnifyPair> undConstraints = new HashSet<>();
+        //H =. Scalar
+        type1 = new PlaceholderType("H");
+        type2 = new ReferenceType("Scalar");
+        undConstraints.add(new UnifyPair(type1, type2, PairOperator.EQUALSDOT));
+        //E <!=. java.lang.Number
+        type1 = new PlaceholderType("E");
+        type2 = new ReferenceType("java.lang.Number");
+        undConstraints.add(new UnifyPair(type1, type2, PairOperator.SMALLERNEQDOT));
+        //C =. A
+        type1 = new PlaceholderType("H");
+        type2 = new PlaceholderType("A");
+        undConstraints.add(new UnifyPair(type1, type2, PairOperator.EQUALSDOT));
+        //L =. Scalar
+        type1 = new PlaceholderType("L");
+        type2 = new ReferenceType("Scalar");
+        undConstraints.add(new UnifyPair(type1, type2, PairOperator.EQUALSDOT));
+        //D <. C
+        type1 = new PlaceholderType("D");
+        type2 = new PlaceholderType("C");
+        undConstraints.add(new UnifyPair(type1, type2, PairOperator.SMALLERDOT));
+        //java.lang.Boolean =. G
+        type1 = new ReferenceType("java.lang.Boolean");
+        type2 = new PlaceholderType("G");
+        undConstraints.add(new UnifyPair(type1, type2, PairOperator.EQUALSDOT));
+        //G =. java.lang.Boolean
+        type1 = new PlaceholderType("G");
+        type2 = new ReferenceType("java.lang.Boolean");
+        undConstraints.add(new UnifyPair(type1, type2, PairOperator.EQUALSDOT));
+        //V <. C
+        type1 = new PlaceholderType("V");
+        type2 = new PlaceholderType("C");
+        undConstraints.add(new UnifyPair(type1, type2, PairOperator.SMALLERDOT));
+        //F <. E
+        type1 = new PlaceholderType("F");
+        type2 = new PlaceholderType("E");
+        undConstraints.add(new UnifyPair(type1, type2, PairOperator.SMALLERDOT));
+        //X <. E
+        type1 = new PlaceholderType("X");
+        type2 = new PlaceholderType("E");
+        undConstraints.add(new UnifyPair(type1, type2, PairOperator.SMALLERDOT));
+        //J <!=. java.lang.Number
+        type1 = new PlaceholderType("J");
+        type2 = new ReferenceType("java.lang.Number");
+        undConstraints.add(new UnifyPair(type1, type2, PairOperator.SMALLERNEQDOT));
+
+        //oder-constraints
+        List<Set<Constraint<UnifyPair>>> oderConstraints = new ArrayList<>();
+        Set<Constraint<UnifyPair>> constraints = new HashSet<>();
+        Constraint<UnifyPair> constraint = new Constraint<>();
+
+        //set #1
+        //D =. java.lang.Float
+        type1 = new PlaceholderType("D");
+        type2 = new ReferenceType("java.lang.Boolean");
+        constraint.add(new UnifyPair(type1, type2, PairOperator.EQUALSDOT));
+        constraints.add(constraint);
+        //D =. java.lang.Integer
+        constraint = new Constraint<>();
+        type1 = new PlaceholderType("D");
+        type2 = new ReferenceType("java.lang.Integer");
+        constraint.add(new UnifyPair(type1, type2, PairOperator.EQUALSDOT));
+        constraints.add(constraint);
+        oderConstraints.add(constraints);
+
+        //set #2
+        constraints = new HashSet<>();
+        //F =. java.lang.Integer
+        constraint = new Constraint<>();
+        type1 = new PlaceholderType("F");
+        type2 = new ReferenceType("java.lang.Integer");
+        constraint.add(new UnifyPair(type1, type2, PairOperator.EQUALSDOT));
+        constraints.add(constraint);
+        //F =. java.lang.Float
+        constraint = new Constraint<>();
+        type1 = new PlaceholderType("F");
+        type2 = new ReferenceType("java.lang.Float");
+        constraint.add(new UnifyPair(type1, type2, PairOperator.EQUALSDOT));
+        constraints.add(constraint);
+        oderConstraints.add(constraints);
+
+        //set #3
+        constraints = new HashSet<>();
+        //H =. ? extends Scalar
+        constraint = new Constraint<>();
+        type1 = new PlaceholderType("H");
+        type2 = new ExtendsType(new ReferenceType("Scalar"));
+        constraint.add(new UnifyPair(type1, type2, PairOperator.EQUALSDOT));
+        //java.lang.Integer =. J
+        type1 = new ReferenceType("java.lang.Integer");
+        type2 = new PlaceholderType("J");
+        constraint.add(new UnifyPair(type1, type2, PairOperator.EQUALSDOT));
+        constraints.add(constraint);
+        //H =. Vector<AJP>
+        constraint = new Constraint<>();
+        type1 = new PlaceholderType("H");
+        type2 = new ReferenceType("Vector", new TypeParams(new PlaceholderType("AJP")));
+        constraint.add(new UnifyPair(type1, type2, PairOperator.EQUALSDOT));
+        //java.lang.Integer =. J
+        type1 = new ReferenceType("java.lang.Integer");
+        type2 = new PlaceholderType("J");
+        constraint.add(new UnifyPair(type1, type2, PairOperator.EQUALSDOT));
+        constraints.add(constraint);
+        //H =. ? extends Vector<AJP>
+        constraint = new Constraint<>();
+        type1 = new PlaceholderType("H");
+        type2 = new ExtendsType(new ReferenceType("Vector", new TypeParams(new PlaceholderType("AJP"))));
+        constraint.add(new UnifyPair(type1, type2, PairOperator.EQUALSDOT));
+        //java.lang.Integer =. J
+        type1 = new ReferenceType("java.lang.Integer");
+        type2 = new PlaceholderType("J");
+        constraint.add(new UnifyPair(type1, type2, PairOperator.EQUALSDOT));
+        constraints.add(constraint);
+        //H =. Scalar
+        constraint = new Constraint<>();
+        type1 = new PlaceholderType("H");
+        type2 = new ReferenceType("Scalar");
+        constraint.add(new UnifyPair(type1, type2, PairOperator.EQUALSDOT));
+        //java.lang.Integer =. J
+        type1 = new ReferenceType("java.lang.Integer");
+        type2 = new PlaceholderType("J");
+        constraint.add(new UnifyPair(type1, type2, PairOperator.EQUALSDOT));
+        constraints.add(constraint);
+        oderConstraints.add(constraints);
+
+        //set #4
+        constraints = new HashSet<>();
+        //java.lang.Integer =. O
+        constraint = new Constraint<>();
+        type1 = new ReferenceType("java.lang.Integer");
+        type2 = new PlaceholderType("O");
+        constraint.add(new UnifyPair(type1, type2, PairOperator.EQUALSDOT));
+        //L =. Scalar
+        type1 = new PlaceholderType("L");
+        type2 = new ReferenceType("Scalar");
+        constraint.add(new UnifyPair(type1, type2, PairOperator.EQUALSDOT));
+        //E <. java.lang.Integer
+        type1 = new PlaceholderType("E");
+        type2 = new ReferenceType("java.lang.Integer");
+        constraint.add(new UnifyPair(type1, type2, PairOperator.SMALLERDOT));
+        constraints.add(constraint);
+        //E <. java.lang.Integer
+        constraint = new Constraint<>();
+        type1 = new PlaceholderType("E");
+        type2 = new ReferenceType("java.lang.Integer");
+        constraint.add(new UnifyPair(type1, type2, PairOperator.SMALLERDOT));
+        //L =. ? extends Vector<AJQ>
+        type1 = new PlaceholderType("L");
+        type2 = new ExtendsType(new ReferenceType("Vector", new TypeParams(new PlaceholderType("AJQ"))));
+        constraint.add(new UnifyPair(type1, type2, PairOperator.EQUALSDOT));
+        //AJQ =. O
+        type1 = new PlaceholderType("AJQ");
+        type2 = new PlaceholderType("O");
+        constraint.add(new UnifyPair(type1, type2, PairOperator.EQUALSDOT));
+        constraints.add(constraint);
+        //java.lang.Integer =. O
+        constraint = new Constraint<>();
+        type1 = new ReferenceType("java.lang.Integer");
+        type2 = new PlaceholderType("O");
+        constraint.add(new UnifyPair(type1, type2, PairOperator.EQUALSDOT));
+        //E <. java.lang.Integer
+        type1 = new PlaceholderType("E");
+        type2 = new ReferenceType("java.lang.Integer");
+        constraint.add(new UnifyPair(type1, type2, PairOperator.SMALLERDOT));
+        //L =. ? extends Scalar
+        type1 = new PlaceholderType("L");
+        type2 = new ExtendsType(new ReferenceType("Scalar"));
+        constraint.add(new UnifyPair(type1, type2, PairOperator.EQUALSDOT));
+        constraints.add(constraint);
+        //L =. Vector<AJQ>
+        constraint = new Constraint<>();
+        type1 = new PlaceholderType("L");
+        type2 = new ReferenceType("Vector", new TypeParams(new PlaceholderType("AJQ")));
+        constraint.add(new UnifyPair(type1, type2, PairOperator.EQUALSDOT));
+        //E <. java.lang.Integer
+        type1 = new PlaceholderType("E");
+        type2 = new ReferenceType("java.lang.Integer");
+        constraint.add(new UnifyPair(type1, type2, PairOperator.SMALLERDOT));
+        //AJQ =. O
+        type1 = new PlaceholderType("AJQ");
+        type2 = new PlaceholderType("O");
+        constraint.add(new UnifyPair(type1, type2, PairOperator.EQUALSDOT));
+        constraints.add(constraint);
+        oderConstraints.add(constraints);
+
+        //set #5
+        constraints = new HashSet<>();
+        //AJR =. S
+        constraint = new Constraint<>();
+        type1 = new PlaceholderType("AJR");
+        type2 = new PlaceholderType("S");
+        constraint.add(new UnifyPair(type1, type2, PairOperator.EQUALSDOT));
+        //E <. java.lang.Integer
+        type1 = new PlaceholderType("E");
+        type2 = new ReferenceType("java.lang.Integer");
+        constraint.add(new UnifyPair(type1, type2, PairOperator.SMALLERDOT));
+        //B =. Vector<AJR>
+        type1 = new PlaceholderType("B");
+        type2 = new ReferenceType("Vector", new TypeParams(new PlaceholderType("AJR")));
+        constraint.add(new UnifyPair(type1, type2, PairOperator.EQUALSDOT));
+        constraints.add(constraint);
+        //java.lang.Integer =. S
+        constraint = new Constraint<>();
+        type1 = new ReferenceType("java.lang.Integer");
+        type2 = new PlaceholderType("S");
+        constraint.add(new UnifyPair(type1, type2, PairOperator.EQUALSDOT));
+        //E <. java.lang.Integer
+        type1 = new PlaceholderType("E");
+        type2 = new ReferenceType("java.lang.Integer");
+        constraint.add(new UnifyPair(type1, type2, PairOperator.SMALLERDOT));
+        //B =. Scalar
+        type1 = new PlaceholderType("B");
+        type2 = new ReferenceType("Scalar");
+        constraint.add(new UnifyPair(type1, type2, PairOperator.EQUALSDOT));
+        constraints.add(constraint);
+        //java.lang.Integer =. S
+        constraint = new Constraint<>();
+        type1 = new ReferenceType("java.lang.Integer");
+        type2 = new PlaceholderType("S");
+        constraint.add(new UnifyPair(type1, type2, PairOperator.EQUALSDOT));
+        //B =. ? extends Scalar
+        type1 = new PlaceholderType("B");
+        type2 = new ExtendsType(new ReferenceType("Scalar"));
+        constraint.add(new UnifyPair(type1, type2, PairOperator.EQUALSDOT));
+        //E <. java.lang.Integer
+        type1 = new PlaceholderType("E");
+        type2 = new ReferenceType("java.lang.Integer");
+        constraint.add(new UnifyPair(type1, type2, PairOperator.SMALLERDOT));
+        constraints.add(constraint);
+        //AJR =. S
+        constraint = new Constraint<>();
+        type1 = new PlaceholderType("AJR");
+        type2 = new PlaceholderType("S");
+        constraint.add(new UnifyPair(type1, type2, PairOperator.EQUALSDOT));
+        //B =. ? extends Vector<AJR>
+        type1 = new PlaceholderType("B");
+        type2 = new ExtendsType(new ReferenceType("Vector", new TypeParams(new PlaceholderType("AJR"))));
+        constraint.add(new UnifyPair(type1, type2, PairOperator.EQUALSDOT));
+        //E <. java.lang.Integer
+        type1 = new PlaceholderType("E");
+        type2 = new ReferenceType("java.lang.Integer");
+        constraint.add(new UnifyPair(type1, type2, PairOperator.SMALLERDOT));
+        constraints.add(constraint);
+        oderConstraints.add(constraints);
+
+        //set #6
+        constraints = new HashSet<>();
+        //O <. java.lang.Float
+        constraint = new Constraint<>();
+        type1 = new PlaceholderType("O");
+        type2 = new ReferenceType("java.lang.Float");
+        constraint.add(new UnifyPair(type1, type2, PairOperator.SMALLERDOT));
+        //java.lang.Float =. U
+        type1 = new ReferenceType("java.lang.Float");
+        type2 = new PlaceholderType("U");
+        constraint.add(new UnifyPair(type1, type2, PairOperator.EQUALSDOT));
+        //S <. java.lang.Float
+        type1 = new PlaceholderType("S");
+        type2 = new ReferenceType("java.lang.Float");
+        constraint.add(new UnifyPair(type1, type2, PairOperator.SMALLERDOT));
+        constraints.add(constraint);
+        //java.lang.Integer =. U
+        constraint = new Constraint<>();
+        type1 = new ReferenceType("java.lang.Integer");
+        type2 = new PlaceholderType("U");
+        constraint.add(new UnifyPair(type1, type2, PairOperator.EQUALSDOT));
+        //S <. java.lang.Integer
+        type1 = new PlaceholderType("S");
+        type2 = new ReferenceType("java.lang.Integer");
+        constraint.add(new UnifyPair(type1, type2, PairOperator.SMALLERDOT));
+        //O <. java.lang.Integer
+        type1 = new PlaceholderType("O");
+        type2 = new ReferenceType("java.lang.Integer");
+        constraint.add(new UnifyPair(type1, type2, PairOperator.SMALLERDOT));
+        constraints.add(constraint);
+        oderConstraints.add(constraints);
+
+        //set #7
+        constraints = new HashSet<>();
+        //java.lang.Integer =. V
+        constraint = new Constraint<>();
+        type1 = new ReferenceType("java.lang.Integer");
+        type2 = new PlaceholderType("V");
+        constraint.add(new UnifyPair(type1, type2, PairOperator.EQUALSDOT));
+        //U <. java.lang.Integer
+        type1 = new PlaceholderType("U");
+        type2 = new ReferenceType("java.lang.Integer");
+        constraint.add(new UnifyPair(type1, type2, PairOperator.SMALLERDOT));
+        //C <. java.lang.Integer
+        type1 = new PlaceholderType("C");
+        type2 = new ReferenceType("java.lang.Integer");
+        constraint.add(new UnifyPair(type1, type2, PairOperator.SMALLERDOT));
+        constraints.add(constraint);
+        //java.lang.Float =. V
+        constraint = new Constraint<>();
+        type1 = new ReferenceType("java.lang.Float");
+        type2 = new PlaceholderType("V");
+        constraint.add(new UnifyPair(type1, type2, PairOperator.EQUALSDOT));
+        //U <. java.lang.Float
+        type1 = new PlaceholderType("U");
+        type2 = new ReferenceType("java.lang.Float");
+        constraint.add(new UnifyPair(type1, type2, PairOperator.SMALLERDOT));
+        //C <. java.lang.Float
+        type1 = new PlaceholderType("C");
+        type2 = new ReferenceType("java.lang.Float");
+        constraint.add(new UnifyPair(type1, type2, PairOperator.SMALLERDOT));
+        constraints.add(constraint);
+        oderConstraints.add(constraints);
+
+        //set #8
+        constraints = new HashSet<>();
+        //W =. java.lang.Float
+        constraint = new Constraint<>();
+        type1 = new PlaceholderType("W");
+        type2 = new ReferenceType("java.lang.Float");
+        constraint.add(new UnifyPair(type1, type2, PairOperator.EQUALSDOT));
+        constraints.add(constraint);
+        //W =. java.lang.Integer
+        constraint = new Constraint<>();
+        type1 = new PlaceholderType("W");
+        type2 = new ReferenceType("java.lang.Integer");
+        constraint.add(new UnifyPair(type1, type2, PairOperator.EQUALSDOT));
+        constraints.add(constraint);
+        oderConstraints.add(constraints);
+
+        //set #9
+        constraints = new HashSet<>();
+        //W <. java.lang.Integer
+        constraint = new Constraint<>();
+        type1 = new PlaceholderType("W");
+        type2 = new ReferenceType("java.lang.Integer");
+        constraint.add(new UnifyPair(type1, type2, PairOperator.SMALLERDOT));
+        //E <. java.lang.Integer
+        type1 = new PlaceholderType("E");
+        type2 = new ReferenceType("java.lang.Integer");
+        constraint.add(new UnifyPair(type1, type2, PairOperator.SMALLERDOT));
+        //java.lang.Integer =. X
+        type1 = new ReferenceType("java.lang.Integer");
+        type2 = new PlaceholderType("X");
+        constraints.add(constraint);
+        //java.lang.Float =. X
+        constraint = new Constraint<>();
+        type1 = new ReferenceType("java.lang.Float");
+        type2 = new PlaceholderType("X");
+        constraint.add(new UnifyPair(type1, type2, PairOperator.EQUALSDOT));
+        //E <. java.lang.Float
+        type1 = new PlaceholderType("E");
+        type2 = new ReferenceType("java.lang.Float");
+        constraint.add(new UnifyPair(type1, type2, PairOperator.SMALLERDOT));
+        //W <. java.lang.Float
+        type1 = new PlaceholderType("W");
+        type2 = new ReferenceType("java.lang.Float");
+        constraint.add(new UnifyPair(type1, type2, PairOperator.SMALLERDOT));
+        constraints.add(constraint);
+        oderConstraints.add(constraints);
+
+
+        //FiniteClosure
+        Set<UnifyPair> fcConstraints = new HashSet<>();
+        //java.lang.Number < java.lang.Object
+        type1 = new ReferenceType("java.lang.Number");
+        type2 = new ReferenceType("java.lang.Object");
+        fcConstraints.add(new UnifyPair(type1, type2, PairOperator.SMALLER));
+        //java.lang.Number < java.io.Serializable
+        type1 = new ReferenceType("java.lang.Number");
+        type2 = new ReferenceType("java.io.Serializable");
+        fcConstraints.add(new UnifyPair(type1, type2, PairOperator.SMALLER));
+        //java.lang.Float < java.lang.Number
+        type1 = new ReferenceType("java.lang.Float");
+        type2 = new ReferenceType("java.lang.Number");
+        fcConstraints.add(new UnifyPair(type1, type2, PairOperator.SMALLER));
+        //java.lang.Integer < java.lang.Number
+        type1 = new ReferenceType("java.lang.Integer");
+        type2 = new ReferenceType("java.lang.Number");
+        fcConstraints.add(new UnifyPair(type1, type2, PairOperator.SMALLER));
+        //java.lang.Integer < java.lang.Object
+        type1 = new ReferenceType("java.lang.Integer");
+        type2 = new ReferenceType("java.lang.Object");
+        fcConstraints.add(new UnifyPair(type1, type2, PairOperator.SMALLER));
+        //java.lang.Integer < java.lang.constant.Constable
+        type1 = new ReferenceType("java.lang.Integer");
+        type2 = new ReferenceType("java.lang.constant.Constable");
+        fcConstraints.add(new UnifyPair(type1, type2, PairOperator.SMALLER));
+        //java.lang.Integer < java.io.Serializable
+        type1 = new ReferenceType("java.lang.Integer");
+        type2 = new ReferenceType("java.io.Serializable");
+        fcConstraints.add(new UnifyPair(type1, type2, PairOperator.SMALLER));
+        //java.lang.Integer < java.lang.constant.ConstantDesc
+        type1 = new ReferenceType("java.lang.Integer");
+        type2 = new ReferenceType("java.lang.constant.ConstantDesc");
+        fcConstraints.add(new UnifyPair(type1, type2, PairOperator.SMALLER));
+        //java.lang.Integer < java.lang.Comparable<java.lang.Integer>
+        type1 = new ReferenceType("java.lang.Integer");
+        type2 = new ReferenceType("java.lang.Comparable", new TypeParams(new ReferenceType("java.lang.Integer")));
+        fcConstraints.add(new UnifyPair(type1, type2, PairOperator.SMALLER));
+        //java.lang.Float < java.lang.Object
+        type1 = new ReferenceType("java.lang.Float");
+        type2 = new ReferenceType("java.lang.Object");
+        fcConstraints.add(new UnifyPair(type1, type2, PairOperator.SMALLER));
+        //java.lang.Float < java.lang.constant.Constable
+        type1 = new ReferenceType("java.lang.Float");
+        type2 = new ReferenceType("java.lang.constant.Constable");
+        fcConstraints.add(new UnifyPair(type1, type2, PairOperator.SMALLER));
+        //java.lang.Float < java.io.Serializable
+        type1 = new ReferenceType("java.lang.Float");
+        type2 = new ReferenceType("java.io.Serializable");
+        fcConstraints.add(new UnifyPair(type1, type2, PairOperator.SMALLER));
+        //java.lang.Float < java.lang.Comparable<java.lang.Float>
+        type1 = new ReferenceType("java.lang.Integer");
+        type2 = new ReferenceType("java.lang.Comparable", new TypeParams(new ReferenceType("java.lang.Float")));
+        fcConstraints.add(new UnifyPair(type1, type2, PairOperator.SMALLER));
+        //java.lang.Float < java.lang.constant.ConstantDesc
+        type1 = new ReferenceType("java.lang.Float");
+        type2 = new ReferenceType("java.lang.constant.ConstantDesc");
+        fcConstraints.add(new UnifyPair(type1, type2, PairOperator.SMALLER));
+        //Scalar<EYW> < java.lang.Object
+        type1 = new ReferenceType("Scalar", new TypeParams(new PlaceholderType("EYW")));
+        type2 = new ReferenceType("java.lang.Object");
+        fcConstraints.add(new UnifyPair(type1, type2, PairOperator.SMALLER));
+        //Scalar<EYW> < Vector<java.lang.Integer>
+        type1 = new ReferenceType("Scalar", new TypeParams(new PlaceholderType("EYW")));
+        type2 = new ReferenceType("Vector", new TypeParams(new ReferenceType("java.lang.Integer")));
+        fcConstraints.add(new UnifyPair(type1, type2, PairOperator.SMALLER));
+        //java.lang.Comparable<java.lang.Float> < java.lang.Object
+        type1 = new ReferenceType("java.lang.Comparable", new TypeParams(new ReferenceType("java.lang.Float")));
+        type2 = new ReferenceType("java.lang.Object");
+        fcConstraints.add(new UnifyPair(type1, type2, PairOperator.SMALLER));
+        //Vector<java.lang.Integer> < java.lang.Object
+        type1 = new ReferenceType("Vector", new TypeParams(new ReferenceType("java.lang.Integer")));
+        type2 = new ReferenceType("java.lang.Object");
+        fcConstraints.add(new UnifyPair(type1, type2, PairOperator.SMALLER));
+        //Scalar < Vector<java.lang.Integer>
+        type1 = new ReferenceType("Scalar");
+        type2 = new ReferenceType("Vector", new TypeParams(new ReferenceType("java.lang.Integer")));
+        fcConstraints.add(new UnifyPair(type1, type2, PairOperator.SMALLER));
+        //java.lang.constant.ConstantDesc < java.lang.Object
+        type1 = new ReferenceType("java.lang.constant.ConstantDesc");
+        type2 = new ReferenceType("java.lang.Object");
+        fcConstraints.add(new UnifyPair(type1, type2, PairOperator.SMALLER));
+        //Scalar < java.lang.Object
+        type1 = new ReferenceType("Scalar");
+        type2 = new ReferenceType("java.lang.Object");
+        fcConstraints.add(new UnifyPair(type1, type2, PairOperator.SMALLER));
+        //java.lang.constant.Constable < java.lang.Object
+        type1 = new ReferenceType("java.lang.constant.Constable");
+        type2 = new ReferenceType("java.lang.Object");
+        fcConstraints.add(new UnifyPair(type1, type2, PairOperator.SMALLER));
+        //Vector<EWV> < java.lang.Object
+        type1 = new ReferenceType("Vector", new TypeParams(new PlaceholderType("EWV")));
+        type2 = new ReferenceType("java.lang.Object");
+        fcConstraints.add(new UnifyPair(type1, type2, PairOperator.SMALLER));
+        //java.io.Serializable < java.lang.Object
+        type1 = new ReferenceType("java.io.Serializable");
+        type2 = new ReferenceType("java.lang.Object");
+        fcConstraints.add(new UnifyPair(type1, type2, PairOperator.SMALLER));
+        //java.lang.Comparable<java.lang.Integer> < java.lang.Object
+        type1 = new ReferenceType("java.lang.Comparable", new TypeParams(new ReferenceType("java.lang.Integer")));
+        type2 = new ReferenceType("java.lang.Object");
+        fcConstraints.add(new UnifyPair(type1, type2, PairOperator.SMALLER));
+
+        FiniteClosure finiteClosure = new FiniteClosure(fcConstraints, new NullWriter());
+        TypeUnify unifyAlgo = new TypeUnify();
+        ConstraintSet< Pair> cons = new ConstraintSet<>();
+        UnifyResultModelParallel urm = new UnifyResultModelParallel(cons, finiteClosure);
+        UnifyTaskModel tasks = new UnifyTaskModel();
+        Set<Set<UnifyPair>> solution = unifyAlgo.unify(undConstraints, oderConstraints, finiteClosure, new NullWriter(), false, urm, tasks);
+        System.out.println(solution);
+        System.out.println(solution.size());
+    }
+}