diff --git a/resources/bytecode/javFiles/Matrix.jav b/resources/bytecode/javFiles/Matrix.jav
index 35d65d51..63bd8bb4 100644
--- a/resources/bytecode/javFiles/Matrix.jav
+++ b/resources/bytecode/javFiles/Matrix.jav
@@ -1,3 +1,5 @@
+import java.util.List;
+import java.util.AbstractList;
 import java.util.Vector;
 import java.lang.Integer;
 //import java.lang.Float;
@@ -30,8 +32,8 @@ public class Matrix    extends Vector<Vector<Integer>> {
                 var erg = 0;
                 var k = 0;
                 while(k < v1.size()) {
-                    erg = erg + v1.elementAt(k)
-                             * m.elementAt(k).elementAt(j);
+                    erg = erg + v1.get(k)
+                             * m.get(k).get(j);
                     k++; }
 //                v2.addElement(new Integer(erg));
                 v2.addElement(erg);
diff --git a/src/main/java/de/dhbwstuttgart/core/JavaTXCompiler.java b/src/main/java/de/dhbwstuttgart/core/JavaTXCompiler.java
index b1b2aa2f..068f1784 100644
--- a/src/main/java/de/dhbwstuttgart/core/JavaTXCompiler.java
+++ b/src/main/java/de/dhbwstuttgart/core/JavaTXCompiler.java
@@ -66,7 +66,7 @@ public class JavaTXCompiler {
 	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?
+    Boolean log = true; //gibt an ob ein Log-File nach System.getProperty("user.dir")+""/logFiles/"" geschrieben werden soll?
     public volatile UnifyTaskModel usedTasks = new UnifyTaskModel();
     public final DirectoryClassLoader classLoader;
 
@@ -207,7 +207,7 @@ public class JavaTXCompiler {
                 cl.getMethods().add(new Method(m.modifier, m.name, m.getReturnType().acceptTV(new TypeExchanger(gtvs)), newParaList, m.block,
                         // new GenericDeclarationList(newGenericsList,
                         // ((GenericDeclarationList)m.getGenerics()).getOffset()),
-                        (GenericDeclarationList) m.getGenerics(), m.getOffset(), true));
+                        (GenericDeclarationList) m.getGenerics(), m.getOffset(), true, false));
             }
 
 		}
diff --git a/src/main/java/de/dhbwstuttgart/parser/SyntaxTreeGenerator/StatementGenerator.java b/src/main/java/de/dhbwstuttgart/parser/SyntaxTreeGenerator/StatementGenerator.java
index b9aae9d3..54f6b680 100644
--- a/src/main/java/de/dhbwstuttgart/parser/SyntaxTreeGenerator/StatementGenerator.java
+++ b/src/main/java/de/dhbwstuttgart/parser/SyntaxTreeGenerator/StatementGenerator.java
@@ -279,7 +279,7 @@ public class StatementGenerator {
 
         if (!Objects.isNull(creator.classCreatorRest())) {
             ArgumentList args = convertArguments(creator.classCreatorRest().arguments().expressionList());
-            ArrayList<RefTypeOrTPHOrWildcardOrGeneric> argTypes = args.getArguments().stream().map(x -> TypePlaceholder.fresh(creator.getStart())).collect(Collectors.toCollection(ArrayList::new));
+            ArrayList<TypePlaceholder> argTypes = args.getArguments().stream().map(x -> TypePlaceholder.fresh(creator.getStart())).collect(Collectors.toCollection(ArrayList::new));
             argTypes.add(TypePlaceholder.fresh(creator.getStart())); // return type
             Statement ret = new NewClass(newclass, args, null, argTypes, creator.getStart());
             ret.setStatement();
@@ -311,7 +311,7 @@ public class StatementGenerator {
         IdentifierContext identifier = innercreator.identifier();
         RefType newclass = (RefType) TypeGenerator.convertTypeName(identifier.getText(), genericArgs, identifier.getStart(), reg, generics);
         ArgumentList args = convertArguments(innercreator.classCreatorRest().arguments().expressionList());
-        ArrayList<RefTypeOrTPHOrWildcardOrGeneric> argTypes = args.getArguments().stream().map(x -> TypePlaceholder.fresh(innercreator.getStart())).collect(Collectors.toCollection(ArrayList::new));
+        ArrayList<TypePlaceholder> argTypes = args.getArguments().stream().map(x -> TypePlaceholder.fresh(innercreator.getStart())).collect(Collectors.toCollection(ArrayList::new));
         Statement ret = new NewClass(newclass, args, null, argTypes, innercreator.getStart());
         ret.setStatement();
         return ret;
@@ -712,7 +712,7 @@ public class StatementGenerator {
         }
 
         ArgumentList argumentList = convertArguments(expr.expressionList());
-        ArrayList<RefTypeOrTPHOrWildcardOrGeneric> signature = argumentList.getArguments().stream().map(x -> (RefTypeOrTPHOrWildcardOrGeneric) TypePlaceholder.fresh(offset)).collect(Collectors.toCollection(ArrayList::new));
+        ArrayList<TypePlaceholder> signature = argumentList.getArguments().stream().map(x -> TypePlaceholder.fresh(offset)).collect(Collectors.toCollection(ArrayList::new));
         signature.add(TypePlaceholder.fresh(offset)); // return type
 
         MethodCall ret;
@@ -737,7 +737,7 @@ public class StatementGenerator {
             name = expr.SUPER().getText();
         }
         ArgumentList argumentList = convertArguments(expr.expressionList());
-        ArrayList<RefTypeOrTPHOrWildcardOrGeneric> signature = argumentList.getArguments().stream().map(x -> (RefTypeOrTPHOrWildcardOrGeneric) TypePlaceholder.fresh(offset)).collect(Collectors.toCollection(ArrayList::new));
+        ArrayList<TypePlaceholder> signature = argumentList.getArguments().stream().map(x -> TypePlaceholder.fresh(offset)).collect(Collectors.toCollection(ArrayList::new));
         signature.add(TypePlaceholder.fresh(offset)); // return type
         MethodCall ret = new MethodCall(TypePlaceholder.fresh(offset), getReceiver(receiver), name, argumentList, TypePlaceholder.fresh(offset), signature, offset);
         ret.setStatement();
diff --git a/src/main/java/de/dhbwstuttgart/parser/SyntaxTreeGenerator/SyntaxTreeGenerator.java b/src/main/java/de/dhbwstuttgart/parser/SyntaxTreeGenerator/SyntaxTreeGenerator.java
index 111bf11c..003f2580 100644
--- a/src/main/java/de/dhbwstuttgart/parser/SyntaxTreeGenerator/SyntaxTreeGenerator.java
+++ b/src/main/java/de/dhbwstuttgart/parser/SyntaxTreeGenerator/SyntaxTreeGenerator.java
@@ -452,8 +452,8 @@ public class SyntaxTreeGenerator {
   protected static Block prepareBlock(Block constructorBlock, RefType superClass) {
     List<Statement> statements = constructorBlock.getStatements();
     if (statements.isEmpty() || !(statements.get(0) instanceof SuperCall || statements.get(0) instanceof ThisCall))  {
-      var signature = new ArrayList<RefTypeOrTPHOrWildcardOrGeneric>();
-      signature.add(new Void(new NullToken()));
+      var signature = new ArrayList<TypePlaceholder>();
+      signature.add(TypePlaceholder.fresh(new NullToken()));
       statements.add(0, new SuperCall(superClass, signature, constructorBlock.getOffset()));
     }
     /* statements.addAll(fieldInitializations); geloescht PL 2018-11-24 */
diff --git a/src/main/java/de/dhbwstuttgart/syntaxtree/Method.java b/src/main/java/de/dhbwstuttgart/syntaxtree/Method.java
index 97b18bcd..27c17b2e 100644
--- a/src/main/java/de/dhbwstuttgart/syntaxtree/Method.java
+++ b/src/main/java/de/dhbwstuttgart/syntaxtree/Method.java
@@ -33,6 +33,7 @@ public class Method extends SyntaxTreeNode implements IItemWithOffset, TypeScope
 	private GenericDeclarationList generics;
 	private final RefTypeOrTPHOrWildcardOrGeneric returnType;
 	public final Boolean isInherited; 
+	public final Boolean isImplemented;
 	
 	/*
 	 * its Constraints
@@ -50,10 +51,11 @@ public class Method extends SyntaxTreeNode implements IItemWithOffset, TypeScope
 		this.block = block;
 		this.generics = gtvDeclarations;
 		this.isInherited = false;
+		this.isImplemented = false;
 	}
 	
 	public Method(int modifier, String name, RefTypeOrTPHOrWildcardOrGeneric returnType, ParameterList parameterList, Block block,
-			  GenericDeclarationList gtvDeclarations, Token offset, Boolean isInherited) {
+			  GenericDeclarationList gtvDeclarations, Token offset, Boolean isInherited, Boolean isOverridden) {
 		super(offset);
 		this.name = name;
 		this.modifier = modifier;
@@ -62,6 +64,7 @@ public class Method extends SyntaxTreeNode implements IItemWithOffset, TypeScope
 		this.block = block;
 		this.generics = gtvDeclarations;
 		this.isInherited = isInherited;
+		this.isImplemented = isOverridden;
 	}
 
 	public ParameterList getParameterList() {
@@ -107,4 +110,10 @@ public class Method extends SyntaxTreeNode implements IItemWithOffset, TypeScope
 	public int hashCode() {
 		return Objects.hash(name, parameterlist, returnType);
 	}
+	
+	@Override
+	public String toString() {
+		return name;
+	
+	}
 }
diff --git a/src/main/java/de/dhbwstuttgart/syntaxtree/factory/ASTFactory.java b/src/main/java/de/dhbwstuttgart/syntaxtree/factory/ASTFactory.java
index 020eb6a0..63767c4d 100644
--- a/src/main/java/de/dhbwstuttgart/syntaxtree/factory/ASTFactory.java
+++ b/src/main/java/de/dhbwstuttgart/syntaxtree/factory/ASTFactory.java
@@ -105,11 +105,46 @@ public class ASTFactory {
 		allInheritedMethods.removeAll(allDeclaredMethods);
 		for (java.lang.reflect.Method method : allDeclaredMethods) {
 			var signature = methodSignatures.get(new Pair<>(method.getName(), org.objectweb.asm.Type.getMethodDescriptor(method)));
-			methoden.add(createMethod(method, signature, jreClass, false));
-		}
+			if (jreClass.getSuperclass()==null) {
+				methoden.add(createMethod(method, signature, jreClass, false, false));
+			}
+			else {
+				Boolean isImplemented = false;
+				isImplemented = Arrays.stream(jreClass.getInterfaces()).
+									   reduce(false, 
+											  (x,y) -> {
+												  try { 
+													  y.getDeclaredMethod(method.getName(), method.getParameterTypes());
+													  return true;
+												  }
+												  catch (java.lang.NoSuchMethodException e) {
+													  return false;
+												  }},
+											  (x,y) -> (x || y)
+											 );
+					
+			    if (isImplemented) {
+			    	methoden.add(createMethod(method, signature, jreClass, false, true));
+			    }
+			    else {
+			    	if (Modifier.isAbstract(jreClass.getSuperclass().getModifiers())) {	
+			    		try {
+			    			jreClass.getSuperclass().getDeclaredMethod(method.getName(), method.getParameterTypes());
+			    			methoden.add(createMethod(method, signature, jreClass, false, true));
+			    		}
+			    		catch (java.lang.NoSuchMethodException e) { 
+								methoden.add(createMethod(method, signature, jreClass, false, false));	
+			    		}
+			    	}
+			    	else {
+			    		methoden.add(createMethod(method, signature, jreClass, false, false));
+			    	}
+			    	
+			    }
+		}}
 		for (java.lang.reflect.Method method : allInheritedMethods) {
 			var signature = methodSignatures.get(new Pair<>(method.getName(), org.objectweb.asm.Type.getMethodDescriptor(method)));
-			methoden.add(createMethod(method, signature, jreClass, true));
+			methoden.add(createMethod(method, signature, jreClass, true, false));
 		}
 		List<Field> felder = new ArrayList<>();
 		for (java.lang.reflect.Field field : jreClass.getDeclaredFields()) {
@@ -192,7 +227,7 @@ public class ASTFactory {
 		return Optional.of(new de.dhbwstuttgart.syntaxtree.Constructor(modifier, name, returnType, parameterList, block, gtvDeclarations, offset /* , new ArrayList<>() geloescht PL 2018-11-24 */));
 	}
 
-	public static Method createMethod(java.lang.reflect.Method jreMethod, String signature, java.lang.Class inClass, Boolean isInherited) {
+	public static Method createMethod(java.lang.reflect.Method jreMethod, String signature, java.lang.Class inClass, Boolean isInherited, Boolean isImplemented) {
 		String name = jreMethod.getName();
 		RefTypeOrTPHOrWildcardOrGeneric returnType;
 		Type jreRetType;
@@ -218,7 +253,7 @@ public class ASTFactory {
 		GenericDeclarationList gtvDeclarations = createGenerics(jreMethod.getTypeParameters(), inClass, jreMethod.getName(), signature);
 		Token offset = new NullToken();
 
-		return new Method(jreMethod.getModifiers(), name, returnType, parameterList, block, gtvDeclarations, offset, isInherited);
+		return new Method(jreMethod.getModifiers(), name, returnType, parameterList, block, gtvDeclarations, offset, isInherited, isImplemented);
 	}
 
 	public static GenericDeclarationList createGenerics(TypeVariable[] typeParameters, Class context, String methodName, String signature) {
diff --git a/src/main/java/de/dhbwstuttgart/syntaxtree/statement/MethodCall.java b/src/main/java/de/dhbwstuttgart/syntaxtree/statement/MethodCall.java
index e1deca0f..9dab74b2 100644
--- a/src/main/java/de/dhbwstuttgart/syntaxtree/statement/MethodCall.java
+++ b/src/main/java/de/dhbwstuttgart/syntaxtree/statement/MethodCall.java
@@ -27,10 +27,10 @@ public class MethodCall extends Statement
     public RefTypeOrTPHOrWildcardOrGeneric receiverType;
     
     //sind Tphs, repraesentieren im Resultset die Signatur der aufgerufenen Methoden, letztes Element ist der Returntyp
-    public final ArrayList<RefTypeOrTPHOrWildcardOrGeneric> signature;  
+    public final ArrayList<TypePlaceholder> signature;  
     
     public MethodCall(RefTypeOrTPHOrWildcardOrGeneric retType, Receiver receiver, String methodName, ArgumentList argumentList, 
-    		          RefTypeOrTPHOrWildcardOrGeneric receiverType, ArrayList<RefTypeOrTPHOrWildcardOrGeneric> signature, Token offset){
+    		          RefTypeOrTPHOrWildcardOrGeneric receiverType, ArrayList<TypePlaceholder> signature, Token offset){
 		super(retType,offset);
 		this.arglist = argumentList;
         this.name = methodName;
@@ -40,7 +40,7 @@ public class MethodCall extends Statement
         if (signature == null) throw new NullPointerException();
 	}
 
-    public List<RefTypeOrTPHOrWildcardOrGeneric> signatureArguments() {
+    public List<TypePlaceholder> signatureArguments() {
         return signature.subList(0, signature.size() - 1);
     }
 
diff --git a/src/main/java/de/dhbwstuttgart/syntaxtree/statement/NewClass.java b/src/main/java/de/dhbwstuttgart/syntaxtree/statement/NewClass.java
index f27bc3e8..005ef001 100644
--- a/src/main/java/de/dhbwstuttgart/syntaxtree/statement/NewClass.java
+++ b/src/main/java/de/dhbwstuttgart/syntaxtree/statement/NewClass.java
@@ -11,6 +11,7 @@ import de.dhbwstuttgart.syntaxtree.Method;
 import de.dhbwstuttgart.syntaxtree.StatementVisitor;
 import de.dhbwstuttgart.syntaxtree.type.RefType;
 import de.dhbwstuttgart.syntaxtree.type.RefTypeOrTPHOrWildcardOrGeneric;
+import de.dhbwstuttgart.syntaxtree.type.TypePlaceholder;
 import de.dhbwstuttgart.typeinference.assumptions.MethodAssumption;
 import de.dhbwstuttgart.typeinference.assumptions.TypeInferenceBlockInformation;
 import de.dhbwstuttgart.typeinference.constraints.Constraint;
@@ -30,9 +31,9 @@ public class NewClass extends MethodCall
      * @param start
      */
     public NewClass(RefType newClass, ArgumentList args, RefTypeOrTPHOrWildcardOrGeneric receiverType, 
-    		ArrayList<RefTypeOrTPHOrWildcardOrGeneric> argTypes, Token start) {
+    		ArrayList<TypePlaceholder> signature, Token start) {
         super(newClass, new ExpressionReceiver(new EmptyStmt(start)), newClass.getName().toString(), 
-        		args, receiverType, argTypes, start);
+        		args, receiverType, signature, start);
     }
 
     @Override
diff --git a/src/main/java/de/dhbwstuttgart/syntaxtree/statement/SuperCall.java b/src/main/java/de/dhbwstuttgart/syntaxtree/statement/SuperCall.java
index e4a7ea01..ebd8cf17 100644
--- a/src/main/java/de/dhbwstuttgart/syntaxtree/statement/SuperCall.java
+++ b/src/main/java/de/dhbwstuttgart/syntaxtree/statement/SuperCall.java
@@ -4,6 +4,7 @@ import de.dhbwstuttgart.parser.NullToken;
 import de.dhbwstuttgart.syntaxtree.StatementVisitor;
 import de.dhbwstuttgart.syntaxtree.type.RefType;
 import de.dhbwstuttgart.syntaxtree.type.RefTypeOrTPHOrWildcardOrGeneric;
+import de.dhbwstuttgart.syntaxtree.type.TypePlaceholder;
 import de.dhbwstuttgart.syntaxtree.type.Void;
 import org.antlr.v4.runtime.Token;
 
@@ -16,12 +17,12 @@ import java.util.List;
 public class SuperCall extends MethodCall
 {
     public SuperCall(RefTypeOrTPHOrWildcardOrGeneric receiverType, 
-    		ArrayList<RefTypeOrTPHOrWildcardOrGeneric> argTypes, Token offset){
+    		ArrayList<TypePlaceholder> argTypes, Token offset){
         this(new ArgumentList(new ArrayList<Expression>(), offset), receiverType, argTypes, offset);
     }
 
     public SuperCall(ArgumentList argumentList, RefTypeOrTPHOrWildcardOrGeneric receiverType, 
-    		ArrayList<RefTypeOrTPHOrWildcardOrGeneric> argTypes, Token offset){
+    		ArrayList<TypePlaceholder> argTypes, Token offset){
         super(new Void(offset), new ExpressionReceiver(new Super(receiverType, offset)), "<init>", argumentList, receiverType, argTypes, offset);
     }
 
diff --git a/src/main/java/de/dhbwstuttgart/syntaxtree/statement/ThisCall.java b/src/main/java/de/dhbwstuttgart/syntaxtree/statement/ThisCall.java
index ee4acc96..8739a619 100644
--- a/src/main/java/de/dhbwstuttgart/syntaxtree/statement/ThisCall.java
+++ b/src/main/java/de/dhbwstuttgart/syntaxtree/statement/ThisCall.java
@@ -3,6 +3,7 @@ package de.dhbwstuttgart.syntaxtree.statement;
 import de.dhbwstuttgart.syntaxtree.Constructor;
 import de.dhbwstuttgart.syntaxtree.StatementVisitor;
 import de.dhbwstuttgart.syntaxtree.type.RefTypeOrTPHOrWildcardOrGeneric;
+import de.dhbwstuttgart.syntaxtree.type.TypePlaceholder;
 import de.dhbwstuttgart.syntaxtree.type.Void;
 import org.antlr.v4.runtime.Token;
 
@@ -11,7 +12,7 @@ import java.util.ArrayList;
 
 public class ThisCall extends MethodCall
 {
-    public ThisCall(ArgumentList argumentList, RefTypeOrTPHOrWildcardOrGeneric receiverType, ArrayList<RefTypeOrTPHOrWildcardOrGeneric> argTypes, Token offset) {
+    public ThisCall(ArgumentList argumentList, RefTypeOrTPHOrWildcardOrGeneric receiverType, ArrayList<TypePlaceholder> argTypes, Token offset) {
         super(new Void(offset), new ExpressionReceiver(new This(offset)), "<init>", argumentList, receiverType, argTypes, offset);
     }
 
diff --git a/src/main/java/de/dhbwstuttgart/typeinference/assumptions/MethodAssumption.java b/src/main/java/de/dhbwstuttgart/typeinference/assumptions/MethodAssumption.java
index e4a92c02..b03ff1dd 100644
--- a/src/main/java/de/dhbwstuttgart/typeinference/assumptions/MethodAssumption.java
+++ b/src/main/java/de/dhbwstuttgart/typeinference/assumptions/MethodAssumption.java
@@ -20,14 +20,16 @@ public class MethodAssumption extends Assumption{
     private RefTypeOrTPHOrWildcardOrGeneric retType;
     List<? extends RefTypeOrTPHOrWildcardOrGeneric> params;
     private final Boolean isInherited;
+    private final Boolean isOverridden;
 
     public MethodAssumption(ClassOrInterface receiver, RefTypeOrTPHOrWildcardOrGeneric retType,
-                            List<? extends RefTypeOrTPHOrWildcardOrGeneric> params, TypeScope scope, Boolean isInherited){
+                            List<? extends RefTypeOrTPHOrWildcardOrGeneric> params, TypeScope scope, Boolean isInherited, Boolean isOverridden){
         super(scope);
         this.receiver = receiver;
         this.retType = retType;
         this.params = params;
         this.isInherited = isInherited;
+        this.isOverridden = isOverridden;
     }
 
     /*
@@ -74,4 +76,8 @@ public class MethodAssumption extends Assumption{
     public Boolean isInherited() {
     	return isInherited;
     }
+    
+    public Boolean isOverridden() {
+    	return isOverridden;
+    }
 }
diff --git a/src/main/java/de/dhbwstuttgart/typeinference/constraints/Constraint.java b/src/main/java/de/dhbwstuttgart/typeinference/constraints/Constraint.java
index ffac994b..970cffef 100644
--- a/src/main/java/de/dhbwstuttgart/typeinference/constraints/Constraint.java
+++ b/src/main/java/de/dhbwstuttgart/typeinference/constraints/Constraint.java
@@ -8,7 +8,8 @@ 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
+	private Boolean isInherited = false;//wird beides nur für die Method-Constraints benoetigt
+	private Boolean isImplemented = false;
 	
 	/*
 	 * wird verwendet um bei der Codegenerierung die richtige Methoden - Signatur
@@ -22,12 +23,14 @@ public class Constraint<A> extends HashSet<A> {
 		super();
 	}
 	
-	public Constraint(Boolean isInherited) {
+	public Constraint(Boolean isInherited, Boolean isImplemented) {
 		this.isInherited = isInherited;
+		this.isImplemented = isImplemented;
 	}
 	
-	public Constraint(Boolean isInherited, Constraint<A> extendConstraint, Set<A> methodSignatureConstraint) {
+	public Constraint(Boolean isInherited, Boolean isImplemented, Constraint<A> extendConstraint, Set<A> methodSignatureConstraint) {
 		this.isInherited = isInherited;
+		this.isImplemented = isImplemented;
 		this.extendConstraint = extendConstraint;
 		this.methodSignatureConstraint = methodSignatureConstraint;
 	}
@@ -40,6 +43,10 @@ public class Constraint<A> extends HashSet<A> {
 		return isInherited;
 	}
 	
+	public Boolean isImplemented() {
+		return isImplemented;
+	}
+	
 	public Constraint<A> getExtendConstraint() {
 		return extendConstraint;
 	}
@@ -57,7 +64,8 @@ public class Constraint<A> extends HashSet<A> {
 	}
 
 	public String toString() {
-		return super.toString() + "\nisInherited = " + isInherited 
+		return super.toString() + "\nisInherited = " + isInherited + " isOveridden = " + isImplemented
+				+ methodSignatureConstraint
 				//" + extendsContraint: "  + (extendConstraint != null ? extendConstraint.toStringBase() : "null" ) 
 				+ "\n" ;
 	}
diff --git a/src/main/java/de/dhbwstuttgart/typeinference/constraints/ConstraintSet.java b/src/main/java/de/dhbwstuttgart/typeinference/constraints/ConstraintSet.java
index f52001b3..14821895 100644
--- a/src/main/java/de/dhbwstuttgart/typeinference/constraints/ConstraintSet.java
+++ b/src/main/java/de/dhbwstuttgart/typeinference/constraints/ConstraintSet.java
@@ -71,12 +71,13 @@ public class ConstraintSet<A> {
         
         for(Set<Constraint<A>> oderConstraint : oderConstraints){
             newOder.add(
-                    oderConstraint.parallelStream().map((Constraint<A> as) -> {
+                    oderConstraint.stream().map((Constraint<A> as) -> {
                     	
                     	Constraint<B> newConst = as.stream()
                     			.map(o)
                     			.collect(Collectors.toCollection((
                     					() -> new Constraint<B> (as.isInherited(),
+                    											 as.isImplemented(),
                     											 (as.getExtendConstraint() != null)
                     											     ? as.getExtendConstraint().stream().map(o).collect(Collectors.toCollection(Constraint::new))
                     											     : null,
diff --git a/src/main/java/de/dhbwstuttgart/typeinference/typeAlgo/TYPEStmt.java b/src/main/java/de/dhbwstuttgart/typeinference/typeAlgo/TYPEStmt.java
index cabe5f87..be402d08 100644
--- a/src/main/java/de/dhbwstuttgart/typeinference/typeAlgo/TYPEStmt.java
+++ b/src/main/java/de/dhbwstuttgart/typeinference/typeAlgo/TYPEStmt.java
@@ -591,7 +591,7 @@ public class TYPEStmt implements StatementVisitor {
         for (var ctor : clazz.getConstructors()) {
             var params = convertParams(ctor.getParameterList(), info);
             if (params.size() != superCall.arglist.getArguments().size()) continue;
-            var assumption = new MethodAssumption(null, new Void(new NullToken()), params, createTypeScope(clazz, ctor), ctor.isInherited);
+            var assumption = new MethodAssumption(null, new Void(new NullToken()), params, createTypeScope(clazz, ctor), ctor.isInherited, false);
 
             GenericsResolver resolver = getResolverInstance();
             Set<Constraint<Pair>> oneMethodConstraints = generateConstraint(superCall, assumption, info, resolver);
@@ -607,7 +607,7 @@ public class TYPEStmt implements StatementVisitor {
         for (var ctor : info.getCurrentClass().getConstructors()) {
             var params = convertParams(ctor.getParameterList(), info);
             if (params.size() != thisCall.arglist.getArguments().size()) continue;
-            var assumption = new MethodAssumption(null, new Void(new NullToken()), params, createTypeScope(info.getCurrentClass(), ctor), ctor.isInherited);
+            var assumption = new MethodAssumption(null, new Void(new NullToken()), params, createTypeScope(info.getCurrentClass(), ctor), ctor.isInherited, false);
 
             GenericsResolver resolver = getResolverInstance();
             Set<Constraint<Pair>> oneMethodConstraints = generateConstraint(thisCall, assumption, info, resolver);
@@ -640,8 +640,8 @@ public class TYPEStmt implements StatementVisitor {
 
     protected Set<Constraint<Pair>> generateConstraint(MethodCall forMethod, MethodAssumption assumption, TypeInferenceBlockInformation info, GenericsResolver resolver) {
         Constraint<Pair> methodConstraint, extendsMethodConstraint;
-        methodConstraint = new Constraint<>(assumption.isInherited());
-        extendsMethodConstraint = new Constraint<>(assumption.isInherited());// PL 2023-01-24: Ersetzt die Dopplung in visit(MethodCall)
+        methodConstraint = new Constraint<>(assumption.isInherited(), assumption.isOverridden());
+        extendsMethodConstraint = new Constraint<>(assumption.isInherited(), assumption.isOverridden());// PL 2023-01-24: Ersetzt die Dopplung in visit(MethodCall)
 
         ClassOrInterface receiverCl = assumption.getReceiver();
         /*
@@ -746,14 +746,14 @@ public class TYPEStmt implements StatementVisitor {
                 public RefTypeOrTPHOrWildcardOrGeneric getReturnType() {
                     throw new NotImplementedException();
                 }
-            }, false));
+            }, false, false));
         }
         for (ClassOrInterface cl : info.getAvailableClasses()) {
             for (Method m : cl.getMethods()) {
                 if (m.getName().equals(name) && m.getParameterList().getFormalparalist().size() == numArgs) {
                     RefTypeOrTPHOrWildcardOrGeneric retType = m.getReturnType();// info.checkGTV(m.getReturnType());
 
-                    ret.add(new MethodAssumption(cl, retType, convertParams(m.getParameterList(), info), createTypeScope(cl, m), m.isInherited));
+                    ret.add(new MethodAssumption(cl, retType, convertParams(m.getParameterList(), info), createTypeScope(cl, m), m.isInherited, m.isImplemented));
                 }
             }
         }
@@ -785,7 +785,7 @@ public class TYPEStmt implements StatementVisitor {
                 for (Method m : cl.getConstructors()) {
                     if (m.getParameterList().getFormalparalist().size() == argList.getArguments().size()) {
                         var params = convertParams(m.getParameterList(), info);
-                        ret.add(new MethodAssumption(cl, cl.generateTypeOfThisClass(), params, createTypeScope(cl, m), m.isInherited));
+                        ret.add(new MethodAssumption(cl, cl.generateTypeOfThisClass(), params, createTypeScope(cl, m), m.isInherited, m.isImplemented));
                     }
                 }
             }
diff --git a/src/main/java/de/dhbwstuttgart/typeinference/unify/RuleSet.java b/src/main/java/de/dhbwstuttgart/typeinference/unify/RuleSet.java
index a3d2474c..275755b2 100644
--- a/src/main/java/de/dhbwstuttgart/typeinference/unify/RuleSet.java
+++ b/src/main/java/de/dhbwstuttgart/typeinference/unify/RuleSet.java
@@ -702,9 +702,10 @@ public class RuleSet implements IRuleSet{
 						x -> uni.apply(pair,x)).collect(Collectors.toCollection((b.getExtendConstraint() != null)
 								? () -> new Constraint<UnifyPair>(
 										  b.isInherited(),
+										  b.isImplemented(),
 										  b.getExtendConstraint().stream().map(x -> uni.apply(pair,x)).collect(Collectors.toCollection(Constraint::new)),
 										  b.getmethodSignatureConstraint().stream().map(x -> uni.apply(pair,x)).collect(Collectors.toCollection(HashSet::new)))
-								: () -> new Constraint<UnifyPair>(b.isInherited())
+								: () -> new Constraint<UnifyPair>(b.isInherited(), b.isImplemented())
 									));
 				oderConstraints.replaceAll(oc -> oc.stream().map(applyUni).collect(Collectors.toCollection(HashSet::new)));
 				/*
diff --git a/src/main/java/de/dhbwstuttgart/typeinference/unify/TypeUnifyTask.java b/src/main/java/de/dhbwstuttgart/typeinference/unify/TypeUnifyTask.java
index 130658dc..6cbfddb0 100644
--- a/src/main/java/de/dhbwstuttgart/typeinference/unify/TypeUnifyTask.java
+++ b/src/main/java/de/dhbwstuttgart/typeinference/unify/TypeUnifyTask.java
@@ -253,13 +253,14 @@ public class TypeUnifyTask extends RecursiveTask<Set<Set<UnifyPair>>>  {
 		one = true;
 		Set<UnifyPair> neweq = new HashSet<>(eq);
 		/* 1-elementige Oder-Constraints werden in und-Constraints umgewandelt */
+		Set<UnifyPair> methodSignatureConstraint = new HashSet<>();
 		oderConstraintsField.stream()
         	.filter(x -> x.size()==1)
-        	.map(y -> y.stream().findFirst().get()).forEach(x -> neweq.addAll(x));
+        	.map(y -> y.stream().findFirst().get()).forEach(x -> { neweq.addAll(x); methodSignatureConstraint.addAll(x.getmethodSignatureConstraint());} );
 		ArrayList<Set<Constraint<UnifyPair>>> remainingOderconstraints = oderConstraintsField.stream()
 				.filter(x -> x.size()>1)
 				.collect(Collectors.toCollection(ArrayList::new));
-		Set<Set<UnifyPair>> res = unify(neweq, remainingOderconstraints, fc, parallel, rekTiefeField, new HashSet<>());
+		Set<Set<UnifyPair>> res = unify(neweq, remainingOderconstraints, fc, parallel, rekTiefeField, methodSignatureConstraint);
 		noOfThread--;
 		try {
 			logFile.close();
@@ -598,11 +599,13 @@ public class TypeUnifyTask extends RecursiveTask<Set<Set<UnifyPair>>>  {
 						eqPrimePrimeSet.forEach(x -> x.addAll(methodSignatureConstraint));
 						
 						//Substitutionen in methodcontraintsets werdne ausgeführt
+						/* PL auskommentiert 2024-05-02
 						eqPrimePrimeSet = eqPrimePrimeSet.stream().map(
 									x -> { Optional<Set<UnifyPair>> help = rules.subst(x); 
 										   return help.isPresent() ? 
 												   help.get(): 
 													   x; }).collect(Collectors.toSet());
+						*/							   
 						/*
 						 * Ende
 						 */
@@ -813,6 +816,7 @@ public class TypeUnifyTask extends RecursiveTask<Set<Set<UnifyPair>>>  {
 			writeLog("nextSetasList: " + nextSetasList.toString());
 			if (variance == 1) {
 				a = oup.max(nextSetasList.iterator());
+				writeLog("Max: a in " + variance + " "+ a);
 				nextSetasList.remove(a);
 				if (oderConstraint) {
 					nextSetasListOderConstraints.add(((Constraint<UnifyPair>)a).getExtendConstraint());
@@ -1350,12 +1354,15 @@ public class TypeUnifyTask extends RecursiveTask<Set<Set<UnifyPair>>>  {
 						while(aParDefIt.hasNext()) {
 							Set<UnifyPair> a_new = aParDefIt.next();
 							List<Set<UnifyPair>> smallerSetasList = oup.smallerThan(a_new, nextSetasList);
+							writeLog("smallerSetasList: " + smallerSetasList);
 							List<Set<UnifyPair>> notInherited = smallerSetasList.stream()
-								.filter(x -> !((Constraint<UnifyPair>)x).isInherited())
+								.filter(x -> !((Constraint<UnifyPair>)x).isInherited() && !((Constraint<UnifyPair>)x).isImplemented())
 								.collect(Collectors.toCollection(ArrayList::new));
+							writeLog("notInherited: " + notInherited+"\n");
 							List<Set<UnifyPair>> notErased = new ArrayList<>();
 							notInherited.stream().forEach(x -> { notErased.addAll(oup.smallerEqThan(x, smallerSetasList)); });
 							List<Set<UnifyPair>> erased = new ArrayList<>(smallerSetasList); 
+							writeLog("notErased: " + notErased+"\n");
 							erased.removeAll(notErased);
 							nextSetasList.removeAll(erased);
 							
diff --git a/src/main/java/de/dhbwstuttgart/typeinference/unify/model/FiniteClosure.java b/src/main/java/de/dhbwstuttgart/typeinference/unify/model/FiniteClosure.java
index 4ef94fba..d6514c67 100644
--- a/src/main/java/de/dhbwstuttgart/typeinference/unify/model/FiniteClosure.java
+++ b/src/main/java/de/dhbwstuttgart/typeinference/unify/model/FiniteClosure.java
@@ -36,6 +36,7 @@ import de.dhbwstuttgart.typeinference.unify.interfaces.IFiniteClosure;
 import de.dhbwstuttgart.typeinference.unify.interfaces.IUnify;
 import de.dhbwstuttgart.util.Pair;
 import org.antlr.v4.runtime.Token;
+import org.apache.commons.io.output.NullWriter;
 
 /**
  * The finite closure for the type unification
@@ -140,6 +141,10 @@ implements IFiniteClosure  {
 		}
 	}
 	
+	public FiniteClosure(Set<UnifyPair> constraints, Writer writer) {
+		this(constraints, writer, null);
+	}
+
 	void testSmaller() {
 		UnifyType tq1, tq2, tq3;
 		tq1 = new ExtendsType(PlaceholderType.freshPlaceholder());
@@ -694,7 +699,7 @@ implements IFiniteClosure  {
 	*/
 	
 	public int compare (UnifyType left, UnifyType right, PairOperator pairop) {
-		//try {logFile.write("left: "+ left + " right: " + right + " pairop: " + pairop);} catch (IOException ie) {}
+		try {logFile.write("left: "+ left + " right: " + right + " pairop: " + pairop +"\n");} catch (IOException ie) {}
 		if (left.getName().equals("Matrix") || right.getName().equals("Matrix")) 
 			System.out.println("");
 		/*
@@ -751,15 +756,15 @@ implements IFiniteClosure  {
 		HashSet<UnifyPair> hs = new HashSet<>();
 		hs.add(up);
 		Set<UnifyPair> smallerRes = unifyTask.applyTypeUnificationRules(hs, this);
-		/*
-		//if (left.getName().equals("Matrix") || right.getName().equals("Matrix")) 
+		
+		//if (left.getName().equals("Vector") || right.getName().equals("AbstractList")) 
 		{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)
@@ -767,6 +772,12 @@ implements IFiniteClosure  {
 													 ((WildcardType)x.getLhsType()).getWildcardedType().equals(x.getRhsType()))
 											 );
 		long smallerLen = smallerRes.stream().filter(delFun).count();
+		try { 
+			logFile.write("\nsmallerLen: " + smallerLen +"\n");
+			logFile.flush();
+		}
+		catch (IOException e) {
+			System.err.println("no LogFile");}
 		if (smallerLen == 0) return -1;
 		else {
 			up = new UnifyPair(right, left, pairop);
@@ -774,15 +785,15 @@ implements IFiniteClosure  {
 			hs = new HashSet<>();
 			hs.add(up);
 			Set<UnifyPair> greaterRes = unifyTask.applyTypeUnificationRules(hs, this);
-			/*
-			//if (left.getName().equals("Matrix") || right.getName().equals("Matrix")) 
+			
+			//if (left.getName().equals("Vector") || right.getName().equals("AbstractList")) 
 			{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;
diff --git a/src/main/java/de/dhbwstuttgart/typeinference/unify/model/ReferenceType.java b/src/main/java/de/dhbwstuttgart/typeinference/unify/model/ReferenceType.java
index 0b1f50c8..62465b1a 100644
--- a/src/main/java/de/dhbwstuttgart/typeinference/unify/model/ReferenceType.java
+++ b/src/main/java/de/dhbwstuttgart/typeinference/unify/model/ReferenceType.java
@@ -34,6 +34,12 @@ public class ReferenceType extends UnifyType {
 		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();
diff --git a/src/test/java/TestComplete.java b/src/test/java/TestComplete.java
index e5dffc01..ad2fd648 100644
--- a/src/test/java/TestComplete.java
+++ b/src/test/java/TestComplete.java
@@ -4,6 +4,7 @@ import org.junit.Ignore;
 import org.junit.Test;
 
 import java.lang.reflect.*;
+import java.util.AbstractList;
 import java.util.Arrays;
 import java.util.List;
 import java.util.Vector;
@@ -180,7 +181,7 @@ public class TestComplete {
     }
 
     @Test
-    @Ignore()
+    //@Ignore()
     public void matrixOpTest() throws Exception {
         var classFiles = generateClassFiles(new ByteArrayClassLoader(), "MatrixOP.jav");
         var matrixOP = classFiles.get("MatrixOP");
@@ -263,7 +264,7 @@ public class TestComplete {
 
         var instanceOfClass_m2 = matrix.getDeclaredConstructor(Vector.class).newInstance(vv1);
 
-        var mul = matrix.getDeclaredMethod("mul", Vector.class);
+        var mul = matrix.getDeclaredMethod("mul", List.class);
         var result = mul.invoke(instanceOfClass_m1, instanceOfClass_m2);
         System.out.println(instanceOfClass_m1.toString() + " * " + instanceOfClass_m2.toString() + " = " + result.toString());