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

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

Makefile

@@ -0,0 +1,3 @@
+NoOptParallel:
+	mvn -DskipTests package
+	cp target/JavaTXcompiler-0.1-jar-with-dependencies.jar target/JavaTXcompiler-0.1-jar-with-dependencies_NoOptParallel.jar

resources/bytecode/javFiles/Scalar.jav

@@ -1,4 +1,4 @@
-import java.util.Vector;
+//import java.util.Vector;
 import java.lang.Integer;
 import java.lang.Float;
 //import java.lang.Byte;
@@ -6,21 +6,11 @@ import java.lang.Float;
 
 public class Scalar extends Vector<Integer> {
 
-    Scalar(v) {
-    	Integer i;
-    	i = 0;
-	while(i < v.size()) {
-	  this.add(v.elementAt(i));
-          i=i+1;
-	} 
-    }
-    
     mul(v) {
         var ret = 0;
         var i = 0;
         while(i < size()) {
             ret = ret + this.elementAt(i) * v.elementAt(i);
-	    i = i+1;
          }
         return ret;
     }

src/main/java/de/dhbwstuttgart/core/JavaTXCompiler.java

@@ -58,6 +58,7 @@ import java.io.FileWriter;
 import java.io.IOException;
 import java.io.OutputStreamWriter;
 import java.io.Writer;
+import java.sql.Timestamp;
 import java.util.*;
 import java.util.function.Function;
 import java.util.stream.Collectors;
@@ -69,11 +70,12 @@ public class JavaTXCompiler {
 
 	//public static JavaTXCompiler INSTANCE;
     final CompilationEnvironment environment;
-	Boolean resultmodel = false;
+	Boolean resultmodel = true;
     public final Map<File, SourceFile> sourceFiles = new HashMap<>();
     Boolean log = false; //gibt an ob ein Log-File nach System.getProperty("user.dir")+""/logFiles/"" geschrieben werden soll?
     public volatile UnifyTaskModel usedTasks = new UnifyTaskModel();
     private final DirectoryClassLoader classLoader;
+    static Writer statistics;
    
 	public JavaTXCompiler(File sourceFile) throws IOException, ClassNotFoundException {
 		this(Arrays.asList(sourceFile), null);
@@ -86,6 +88,8 @@ public class JavaTXCompiler {
 		this(sourceFiles, null);
 	}
     public JavaTXCompiler(List<File> sources, List<File> contextPath) throws IOException, ClassNotFoundException {
+    	statistics = new FileWriter(new File(System.getProperty("user.dir") + "/" + sources.get(0).getName() + "_"+ new Timestamp(System.currentTimeMillis())));
+    	statistics.write("test");
         if(contextPath == null || contextPath.isEmpty()){
         	//When no contextPaths are given, the working directory is the sources root
 			contextPath = Lists.newArrayList(new File(System.getProperty("user.dir")));
@@ -578,6 +582,7 @@ public class JavaTXCompiler {
 			unifyCons = unifyCons.map(distributeInnerVars);
 			logFile.write("\nUnify_distributeInnerVars: " + unifyCons.toString());
 			TypeUnify unify = new TypeUnify();
+			unify.statistics = statistics;
 			// Set<Set<UnifyPair>> results = new HashSet<>(); Nach vorne gezogen
 			logFile.write("FC:\\" + finiteClosure.toString() + "\n");
 			for (SourceFile sf : this.sourceFiles.values()) {
@@ -730,6 +735,7 @@ public class JavaTXCompiler {
 				System.out.println("Constraints for Generated Generics: " + " ???");
 				logFile.write("RES_FINAL: " + li.getResults().toString() + "\n");
 				logFile.flush();
+				statistics.close();
 				return li.getResults();
 			}
 			/* UnifyResultModel End */
@@ -765,6 +771,7 @@ public class JavaTXCompiler {
 		} catch (IOException e) {
 			System.err.println("kein LogFile");
 		}
+		statistics.close();
 		return results.stream()
 				.map((unifyPairs -> new ResultSet(UnifyTypeFactory.convert(unifyPairs, Pair.generateTPHMap(cons)))))
 				.collect(Collectors.toList());

src/main/java/de/dhbwstuttgart/syntaxtree/factory/ASTFactory.java

@@ -35,7 +35,7 @@ public class ASTFactory {
 		JavaClassName name = new JavaClassName(jreClass.getName());
 		List<Method> methoden = new ArrayList<>();
 		List<de.dhbwstuttgart.syntaxtree.Constructor> konstruktoren = new ArrayList<>();
-		for(java.lang.reflect.Constructor constructor : jreClass.getConstructors()){
+		for(java.lang.reflect.Constructor constructor : jreClass.getDeclaredConstructors()){
 				createConstructor(constructor, jreClass).map(c -> konstruktoren.add(c));
 		}
 		Set<java.lang.reflect.Method> allMethods = new HashSet<>(Arrays.asList(jreClass.getMethods()));

src/main/java/de/dhbwstuttgart/typeinference/typeAlgo/TYPEStmt.java

@@ -495,7 +495,7 @@ public class TYPEStmt implements StatementVisitor{
     @Override
     public void visit(Return returnExpr) {
         returnExpr.retexpr.accept(this);
-        constraintsSet.addUndConstraint(new Pair(returnExpr.getType(),info.getCurrentTypeScope().getReturnType(), PairOperator.SMALLERDOT));
+        constraintsSet.addUndConstraint(new Pair(returnExpr.getType(),info.getCurrentTypeScope().getReturnType(), PairOperator.EQUALSDOT));
     }
 
     @Override
@@ -610,8 +610,8 @@ public class TYPEStmt implements StatementVisitor{
         //Fuer Bytecodegenerierung PL 2020-03-09 wird derzeit nicht benutzt ENDE
         
       
-        methodConstraint.add(new Pair(assumption.getReturnType(resolver), forMethod.getType(), PairOperator.SMALLERDOT));
+        methodConstraint.add(new Pair(assumption.getReturnType(resolver), forMethod.getType(), PairOperator.EQUALSDOT));
-        extendsMethodConstraint.add(new Pair(assumption.getReturnType(resolver), forMethod.getType(), PairOperator.SMALLERDOT));
+        extendsMethodConstraint.add(new Pair(assumption.getReturnType(resolver), forMethod.getType(), PairOperator.EQUALSDOT));
         
         //methodConstraint.add(new Pair(assumption.getReturnType(resolver), forMethod.getType(), PairOperator.EQUALSDOT));
         //extendsMethodConstraint.add(new Pair(assumption.getReturnType(resolver), forMethod.getType(), PairOperator.EQUALSDOT));

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

@@ -13,6 +13,7 @@ import java.util.function.Function;
 import java.util.stream.Collectors;
 
 import de.dhbwstuttgart.exceptions.DebugException;
+import de.dhbwstuttgart.syntaxtree.type.ExtendsWildcardType;
 import de.dhbwstuttgart.typeinference.unify.interfaces.IFiniteClosure;
 import de.dhbwstuttgart.typeinference.unify.interfaces.IRuleSet;
 import de.dhbwstuttgart.typeinference.unify.model.ExtendsType;
@@ -390,26 +391,51 @@ public class RuleSet implements IRuleSet{
 		if((pair.getPairOp() != PairOperator.SMALLERDOT) && (pair.getPairOp() != PairOperator.SMALLERNEQDOT))
 			return false;
 		
-		if (pair.getPairOp() == PairOperator.SMALLERNEQDOT) {
+		UnifyType lhsType = pair.getLhsType();
-			UnifyType lhs = pair.getLhsType();
+		UnifyType rhsType = pair.getRhsType();
-			UnifyType rhs = pair.getRhsType();
-			if (lhs instanceof WildcardType) {
-				lhs = ((WildcardType)lhs).getWildcardedType();
-			}
-			if (rhs instanceof WildcardType) {
-				rhs = ((WildcardType)rhs).getWildcardedType();
-			}
 			
-			if	(lhs.equals(rhs)){
+		/*
+		 * ty <. ? extends ty' is wrong	
+		 */
+		if (rhsType instanceof ExtendsType) {
 			return false;
 		}
+	
+		/*
+		 * ? super ty <. ty' is wrong
+		 * except Ty' = Object or ty' = ? super Object	
+		 */
+		if ((lhsType instanceof SuperType) && 
+				(!(rhsType.equals(new ReferenceType("java.lang.Object", false)))) &&
+				!(rhsType.equals(new SuperType (new ReferenceType("java.lang.Object", false))))) {
+			return false;
+		}
+		
+		/*
+		 * ? extends ty <. ty' is equivalent to ty < ty'
+		 */
+		if (lhsType instanceof ExtendsType) {
+				lhsType = ((WildcardType)lhsType).getWildcardedType();
+		}
+		
+		/*
+		 * ty <. ? super ty' ist equivalent to ty <. ty'
+		 */
+		if (rhsType instanceof SuperType) {
+			rhsType = ((WildcardType)rhsType).getWildcardedType();
+		}
+		
+		/*
+		 * SMALLERNEQDOT => type must not be equal
+		 */
+		if (pair.getPairOp() == PairOperator.SMALLERNEQDOT && lhsType.equals(rhsType)){
+			return false; 
 		}
 		
-		UnifyType lhsType = pair.getLhsType();
 		if(!(lhsType instanceof ReferenceType) && !(lhsType instanceof PlaceholderType))
 			return false;
 		
-		UnifyType rhsType = pair.getRhsType();
+		
 		if(!(rhsType instanceof ReferenceType) && !(rhsType instanceof PlaceholderType))
 			return false;
 		

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

@@ -18,6 +18,7 @@ import de.dhbwstuttgart.typeinference.unify.model.UnifyPair;
 
 public class TypeUnify {
 	
+	public static Writer statistics;
 	/**
 	 * unify parallel ohne result modell
 	 * @param undConstrains
@@ -73,13 +74,16 @@ public class TypeUnify {
 	 * @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);
+		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");
@@ -107,6 +111,7 @@ public class TypeUnify {
 	 */
 	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");

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

@@ -19,6 +19,16 @@ 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;

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

@@ -21,6 +21,7 @@ import java.util.stream.Stream;
 
 import org.apache.commons.io.output.NullOutputStream;
 
+import de.dhbwstuttgart.core.JavaTXCompiler;
 import de.dhbwstuttgart.exceptions.TypeinferenceException;
 import de.dhbwstuttgart.parser.NullToken;
 import de.dhbwstuttgart.syntaxtree.factory.UnifyTypeFactory;
@@ -46,6 +47,7 @@ import de.dhbwstuttgart.typeinference.unify.model.UnifyType;
 import de.dhbwstuttgart.typeinference.unify.model.WildcardType;
 import de.dhbwstuttgart.util.Pair;
 import de.dhbwstuttgart.typeinference.unify.model.OrderingUnifyPair;
+import de.dhbwstuttgart.core.JavaTXCompiler;
 
 import java.io.File;
 import java.io.FileWriter;
@@ -80,7 +82,7 @@ public class TypeUnifyTask extends RecursiveTask<Set<Set<UnifyPair>>>  {
 	private static int totalnoOfThread = 0;
 	int thNo;
 	protected boolean one = false;
-	Integer MaxNoOfThreads = 8;
+	Integer MaxNoOfThreads = 128;
 
 	public static final String rootDirectory = System.getProperty("user.dir")+"/test/logFiles/";
 	Writer logFile;
@@ -125,12 +127,16 @@ public class TypeUnifyTask extends RecursiveTask<Set<Set<UnifyPair>>>  {
 	
 	static int noBacktracking;
 	
+	static int noLoop;
+	
 	static Integer  noShortendElements = 0;
 	
 	Boolean myIsCanceled = false;
 	
 	volatile UnifyTaskModel usedTasks;
 	
+	static Writer statistics;
+	
 	public TypeUnifyTask() { 
 		rules = new RuleSet();
 	}
@@ -149,7 +155,11 @@ 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) {
+		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) {
 		synchronized (this) { 
 			this.eq = eq;
@@ -248,7 +258,7 @@ public class TypeUnifyTask extends RecursiveTask<Set<Set<UnifyPair>>>  {
 	
 	protected Set<Set<UnifyPair>> compute() {
 		if (one) {
-			System.out.println("two");
+			//System.out.println("two");
 		}
 		one = true;
 		Set<UnifyPair> neweq = new HashSet<>(eq);
@@ -592,6 +602,7 @@ public class TypeUnifyTask extends RecursiveTask<Set<Set<UnifyPair>>>  {
 						
 							
 						urm.notify(eqPrimePrimeSet);
+						writeStatistics("Result: " + eqPrimePrimeSet.toString());
 					}
 				}
 				else if(eqPrimePrime.isPresent()) {
@@ -646,6 +657,10 @@ public class TypeUnifyTask extends RecursiveTask<Set<Set<UnifyPair>>>  {
 		
 		//oneElems: Alle 1-elementigen Mengen, die nur ein Paar 
 		//a <. theta, theta <. a oder a =. theta enthalten 
+		
+		//statistics
+		//writeStatistics("\nNumber of Constraints (" + rekTiefe + "): " + topLevelSets.size());
+		
 		Set<Set<UnifyPair>> oneElems = new HashSet<>();
 		oneElems.addAll(topLevelSets.stream()
 				                    .filter(x -> x.size()==1)
@@ -663,6 +678,9 @@ public class TypeUnifyTask extends RecursiveTask<Set<Set<UnifyPair>>>  {
 		Set<? extends Set<UnifyPair>> nextSet = optNextSet.get(); 
 		//writeLog("nextSet: " + nextSet.toString());
 		List<Set<UnifyPair>> nextSetasList =new ArrayList<>(nextSet);
+		
+		//writeStatistics(" Start Number of elements ( " /* + nextSetasList.get(0).stream().findFirst().get().getBasePair()*/  +"): (" + rekTiefe + "): " + nextSetasList.size());
+
 		/*
 		try {
 		//List<Set<UnifyPair>> 
@@ -774,8 +792,12 @@ public class TypeUnifyTask extends RecursiveTask<Set<Set<UnifyPair>>>  {
 		}
 		/* sameEqSet-Bestimmung Ende */
 		
+		int hilf = 0;
 		Set<UnifyPair> a = null;
 		while (nextSetasList.size() > 0) {
+			
+			//statistics
+			//writeStatistics(" Actual Number of elements( " + nextSetasList.get(0).stream().findFirst().get().getBasePair() +"): (" + rekTiefe + "): " + nextSetasList.size());
 			Set<UnifyPair> a_last = a;
 			
 			/* Liste der Faelle für die parallele Verarbeitung 
@@ -794,6 +816,8 @@ public class TypeUnifyTask extends RecursiveTask<Set<Set<UnifyPair>>>  {
 			
 			writeLog("nextSet: " + nextSet.toString());
 			writeLog("nextSetasList: " + nextSetasList.toString());
+			
+			/* staistics Nextvar an Hand Varianzbestimmung auskommentieren Anfang 
 			if (variance == 1) {
 				a = oup.max(nextSetasList.iterator());
 				nextSetasList.remove(a);
@@ -865,7 +889,10 @@ public class TypeUnifyTask extends RecursiveTask<Set<Set<UnifyPair>>>  {
 					}
 				}
 			}
+			Nextvar an Hand Varianzbestimmung auskommentieren Ende */
+			a = nextSetasList.remove(0); //statisticsList
 			
+			//writeStatistics(a.toString());
 			if (oderConstraint) {//Methodconstraints werden abgespeichert für die Bytecodegenerierung von Methodenaufrufen
 				methodSignatureConstraint.addAll(((Constraint<UnifyPair>)a).getmethodSignatureConstraint());
 				//System.out.println("ERSTELLUNG: " +methodSignatureConstraint);
@@ -887,11 +914,13 @@ public class TypeUnifyTask extends RecursiveTask<Set<Set<UnifyPair>>>  {
 			/* Wenn bei (a \in theta) \in a zu Widerspruch in oneElems wird
 			 * a verworfen und zu nächstem Element von nextSetasList gegangen  
 			 */
+			/* statistics sameEq wird nicht betrachtet ANGFANG
 			if (!oderConstraint && !sameEqSet.isEmpty() && !checkNoContradiction(a, sameEqSet, result)) {
 				a = null;
 				noShortendElements++;
 				continue;
 			}
+			statistics sameEq wird nicht betrachtet ENDE */
 			
 			/* Wenn parallel gearbeitet wird, wird je nach Varianz ein neuer Thread
 			 * gestartet, der parallel weiterarbeitet.
@@ -918,19 +947,22 @@ public class TypeUnifyTask extends RecursiveTask<Set<Set<UnifyPair>>>  {
 					writeLog("a in " + variance + " "+ a);
 					writeLog("nextSetasListRest: " + nextSetasListRest.toString());
 				}
-				while (!nextSetasListRest.isEmpty()) {
+				while (!nextSetasList.isEmpty()) {
-					Set<UnifyPair> nSaL = nextSetasListRest.remove(0);
+					Set<UnifyPair> nSaL = nextSetasList.remove(0);
-					synchronized (this) { nextSetasList.remove(nSaL);
+					synchronized (this) { //nextSetasList.remove(nSaL);
 						writeLog("1 RM" + nSaL.toString());
 					}
 					
 					if (!oderConstraint) {
+						
+						/* statistics sameEq wird nicht betrachtet ANGFANG
 						//ueberpruefung ob zu a =. ty \in nSaL in sameEqSet ein Widerspruch besteht
 						if (!sameEqSet.isEmpty() && !checkNoContradiction(nSaL, sameEqSet, result)) {
 							nSaL = null;
 							noShortendElements++;
 							continue;
 						}
+						statistics sameEq wird nicht betrachtet ENDE */
 					}
 					else {
 						nextSetasListOderConstraints.add(((Constraint<UnifyPair>)nSaL).getExtendConstraint());
@@ -1017,19 +1049,21 @@ public class TypeUnifyTask extends RecursiveTask<Set<Set<UnifyPair>>>  {
 					writeLog("a in " + variance + " "+ a);
 					writeLog("nextSetasListRest: " + nextSetasListRest.toString());
 				}
-				while (!nextSetasListRest.isEmpty()) {
+				while (!nextSetasList.isEmpty()) {
-					Set<UnifyPair> nSaL = nextSetasListRest.remove(0);
+					Set<UnifyPair> nSaL = nextSetasList.remove(0);
-					synchronized (this) { nextSetasList.remove(nSaL);
+					synchronized (this) { //nextSetasList.remove(nSaL);
 						writeLog("-1 RM" + nSaL.toString());
 					}
 					
 					if (!oderConstraint) {
+						/* statistics sameEq wird nicht betrachtet ANGFANG
 						//ueberpruefung ob zu a =. ty \in nSaL in sameEqSet ein Widerspruch besteht
 						if (!sameEqSet.isEmpty() && !checkNoContradiction(nSaL, sameEqSet, result)) {
 							nSaL = null;
 							noShortendElements++;
 							continue;
 						}
+						statistics sameEq wird nicht betrachtet ENDE */
 					}
 					else {
 						nextSetasListOderConstraints.add(((Constraint<UnifyPair>)nSaL).getExtendConstraint());
@@ -1117,9 +1151,9 @@ public class TypeUnifyTask extends RecursiveTask<Set<Set<UnifyPair>>>  {
 					writeLog("a in " + variance + " "+ a);
 					writeLog("nextSetasListRest: " + nextSetasListRest.toString());
 				}
-		    	while (!nextSetasListRest.isEmpty()) {
+		    	while (!nextSetasList.isEmpty()) {
-		    		Set<UnifyPair> nSaL = nextSetasListRest.remove(0);
+		    		Set<UnifyPair> nSaL = nextSetasList.remove(0);
-		    		nextSetasList.remove(nSaL); //PL einkommentiert 20-02-03
+		    		//nextSetasList.remove(nSaL); //PL einkommentiert 20-02-03
 		    		Set<UnifyPair> newEq = new HashSet<>(eq);
 		    		Set<Set<UnifyPair>> newElems = new HashSet<>(elems);
 		    		List<Set<Constraint<UnifyPair>>> newOderConstraints = new ArrayList<>(oderConstraints);
@@ -1179,6 +1213,9 @@ public class TypeUnifyTask extends RecursiveTask<Set<Set<UnifyPair>>>  {
 		    }}}
 			
 			//Ab hier alle parallele Berechnungen wieder zusammengeführt.
+			//if (hilf == 1)
+				//System.out.println();
+			//writeStatistics("Zusammengeführt(" + rekTiefe + "): " +  nextSetasList.size());
 			if (oderConstraint) {//Wenn weiteres Element nextSetasList genommen wird, muss die vorherige methodsignatur geloescht werden
 				methodSignatureConstraint.removeAll(((Constraint<UnifyPair>)a).getmethodSignatureConstraint());
 				//System.out.println("REMOVE: " +methodSignatureConstraint);
@@ -1192,6 +1229,7 @@ public class TypeUnifyTask extends RecursiveTask<Set<Set<UnifyPair>>>  {
 					    || (!isUndefinedPairSetSet(res) && !isUndefinedPairSetSet(result))
 					    || result.isEmpty()) {
 						
+						/* auskommentiert damit alle Lösungen reinkommen ANFANG
 						if ((!result.isEmpty() && !res.isEmpty() && !isUndefinedPairSetSet(res) && !isUndefinedPairSetSet(result)) //korrekte Loesungen aus und-constraints
 							&& (a.stream().map(x-> (x.getBasePair() != null)).reduce(true, (x, y) -> (x && y)))) //bei oder-Constraints nicht ausfuehren
 						{
@@ -1213,7 +1251,7 @@ public class TypeUnifyTask extends RecursiveTask<Set<Set<UnifyPair>>>  {
 						
 							//Alle Variablen bestimmen die nicht hinzugefügt wurden in a_last
 							//System.out.println(a_last);
-							
+							if (a_last != null) {
 							try {//PL eingefuegt 2019-03-06 da bei map mmer wieder Nullpointer kamen
 							a_last.forEach(x -> {writeLog("a_last_elem:" + x + " basepair: " + x.getBasePair());});//PL 2019-05-13 ins try hinzugefuegt Nullpointer-Exception ist in der Zeile aufgetaucht.
 							List<PlaceholderType> varsLast_a = 
@@ -1265,9 +1303,11 @@ public class TypeUnifyTask extends RecursiveTask<Set<Set<UnifyPair>>>  {
 							}
 							catch (NullPointerException e) {
 								writeLog("NullPointerException: " + a_last.toString());
+							}}
 						}
-						}
+						else 
-						else {
+						auskommentiert damit alle Lösungen reinkommen ANFANG */
+						{
 							//alle Fehlerfaelle und alle korrekten Ergebnis jeweils adden
 							writeLog("RES Fst: result: " + result.toString() + " res: " + res.toString());
 							result.addAll(res);
@@ -1287,7 +1327,7 @@ public class TypeUnifyTask extends RecursiveTask<Set<Set<UnifyPair>>>  {
 							//wenn korrektes Ergebnis gefunden alle Fehlerfaelle loeschen
 							result = par_res;
 							if (!par_res.isEmpty() && par_res.iterator().next() instanceof WildcardType) {
-								System.out.println("");
+								//System.out.println("");
 							}
 						}
 						else { 
@@ -1303,7 +1343,7 @@ public class TypeUnifyTask extends RecursiveTask<Set<Set<UnifyPair>>>  {
 					//break;
 				}
 				
-			/* auskommentiert um alle Max und min Betrachtung auszuschalten ANFANG */
+			/* auskommentiert um alle Max und min Betrachtung auszuschalten ANFANG 
 			if (!result.isEmpty() && (!isUndefinedPairSetSet(res) || !aParDef.isEmpty())) {
 				if (nextSetasList.iterator().hasNext() && nextSetasList.iterator().next().stream().filter(x -> x.getLhsType().getName().equals("B")).findFirst().isPresent() && nextSetasList.size()>1) 
 					System.out.print("");
@@ -1411,6 +1451,7 @@ public class TypeUnifyTask extends RecursiveTask<Set<Set<UnifyPair>>>  {
 				else { if (variance == 0) {
 					writeLog("a: " + rekTiefe + " variance: " + variance + a.toString());
 					if (!oderConstraint) {
+						writeStatistics("break");
 						break; 
 					}
 					else {
@@ -1439,7 +1480,7 @@ public class TypeUnifyTask extends RecursiveTask<Set<Set<UnifyPair>>>  {
 				writeLog("a: " + rekTiefe + " variance: " + variance + a.toString());
 				}
 			}
-			 /* auskommentiert um alle Max und min Betrachtung auszuschalten ENDE */ 
+			 auskommentiert um alle Max und min Betrachtung auszuschalten ENDE */ 
 			
 			if (isUndefinedPairSetSet(res) && aParDef.isEmpty()) {
 				int nofstred= 0;
@@ -1472,8 +1513,9 @@ public class TypeUnifyTask extends RecursiveTask<Set<Set<UnifyPair>>>  {
 									return new Pair<>(su, x.getGroundBasePair());})
 						.collect(Collectors.toCollection(HashSet::new));
 				if (res.size() > 1) {
-					System.out.println();
+					//System.out.println();
 				}
+				/* statistics no erase
 				writeLog("nextSetasList vor filter-Aufruf: " + nextSetasList);
 				if (!oderConstraint) {//PL 2023-02-08 eingefuegt: Bei oderconstraints sind Subststitutionen nicht als Substitutionen in idesem Sinne zu sehen
 					nextSetasList = nextSetasList.stream().filter(x -> {
@@ -1486,6 +1528,7 @@ public class TypeUnifyTask extends RecursiveTask<Set<Set<UnifyPair>>>  {
 							.collect(Collectors.toCollection(ArrayList::new));
 				}
 				writeLog("nextSetasList nach filter-Aufruf: " + nextSetasList);
+				*/
 				nofstred = nextSetasList.size();
 				//NOCH NICHT korrekt PL 2018-10-12
 				//nextSetasList = nextSetasList.stream().filter(y -> couldBecorrect(reducedUndefResSubstGroundedBasePair, y))
@@ -1503,8 +1546,11 @@ public class TypeUnifyTask extends RecursiveTask<Set<Set<UnifyPair>>>  {
 				writeLog("Number of all erased Elements (undef): " + noAllErasedElements.toString());
 				noBacktracking++;
 				writeLog("Number of Backtracking: " + noBacktracking);
-				System.out.println("");
+				//writeStatistics("Number of erased elements: " + (len - nextSetasList.size()));
+				//writeStatistics("Number of Backtracking: " + noBacktracking);
+				//System.out.println("");
 			}
+			else //writeStatistics("res: " + res.toString());
 			//if (nextSetasList.size() == 0 && isUndefinedPairSetSet(result) && nextSet.size() > 1) { 
 			//	return result;
 			//}
@@ -1513,6 +1559,9 @@ public class TypeUnifyTask extends RecursiveTask<Set<Set<UnifyPair>>>  {
 			//}
 			//else result.stream().filter(y -> !isUndefinedPairSet(y));
 			writeLog("res: " + res.toString());
+			//writeStatistics("  End Number of Elements (" + rekTiefe + "): " + nextSetasList.size());
+			noLoop++;
+			//writeStatistics("Number of Loops: " + noLoop);
 		}
 		//2020-02-02: if (variance ==2) Hier Aufruf von filterOverriding einfuegen
 		writeLog("Return computeCR: " + result.toString());
@@ -2008,7 +2057,7 @@ public class TypeUnifyTask extends RecursiveTask<Set<Set<UnifyPair>>>  {
 				//System.out.println(pair);
 				if (first) { //writeLog(pair.toString()+"\n");
 					if (((PlaceholderType)(pair.getLhsType())).getName().equals("AR")) {
-						System.out.println("AR");
+						//System.out.println("AR");
 					}
 					Set<Set<UnifyPair>> x1 = unifyCase1(pair, fc);
 					if (pairOp == PairOperator.SMALLERNEQDOT) {
@@ -2576,4 +2625,18 @@ public class TypeUnifyTask extends RecursiveTask<Set<Set<UnifyPair>>>  {
 			}
 	}
 	}
+	
+	void writeStatistics(String str) {
+		if (finalresult) {
+		synchronized ( this ) { 
+			try {
+				statistics.write("Thread No. " + thNo + ": " + str + "\n");
+				statistics.flush();
+			
+			}
+			catch (IOException e) { 
+				System.err.println("kein StatisticsFile");
+			}
+	}}
+	}
 }

src/test/java/targetast/TestComplete.java

@@ -281,6 +281,7 @@ public class TestComplete {
 
     @Test
     public void scalarTest() throws Exception {
+
         var classFiles = generateClassFiles(new ByteArrayClassLoader(), "Scalar.jav");
         var scalar = classFiles.get("Scalar");