diff --git a/src/main/java/de/dhbwstuttgart/core/JavaTXCompiler.java b/src/main/java/de/dhbwstuttgart/core/JavaTXCompiler.java
index 8c2b6d41..f03589ed 100644
--- a/src/main/java/de/dhbwstuttgart/core/JavaTXCompiler.java
+++ b/src/main/java/de/dhbwstuttgart/core/JavaTXCompiler.java
@@ -73,7 +73,7 @@ public class JavaTXCompiler {
 
 	public static JavaTXCompiler INSTANCE;
     final CompilationEnvironment environment;
-	Boolean resultmodel = true;
+	Boolean resultmodel = false;
     public final Map<File, SourceFile> sourceFiles = new HashMap<>();
     Boolean log = true; //gibt an ob ein Log-File nach System.getProperty("user.dir")+"src/test/java/logFiles" geschrieben werden soll?
     public volatile UnifyTaskModel usedTasks = new UnifyTaskModel();
diff --git a/src/main/java/de/dhbwstuttgart/typeinference/unify/RuleSet.java b/src/main/java/de/dhbwstuttgart/typeinference/unify/RuleSet.java
index a392a2fa..755cbf0a 100644
--- a/src/main/java/de/dhbwstuttgart/typeinference/unify/RuleSet.java
+++ b/src/main/java/de/dhbwstuttgart/typeinference/unify/RuleSet.java
@@ -31,6 +31,9 @@ import de.dhbwstuttgart.typeinference.unify.distributeVariance;
 import java.io.FileWriter;
 import java.io.IOException;
 import java.io.Writer;
+import java.io.OutputStreamWriter;
+
+import org.apache.commons.io.output.NullOutputStream;
 
 /**
  * Implementation of the type inference rules.
@@ -43,6 +46,7 @@ public class RuleSet implements IRuleSet{
 	
 	public RuleSet() {
 		super();
+		logFile = new OutputStreamWriter(new NullOutputStream());
 	}
 	
 	RuleSet(Writer logFile) {
diff --git a/src/main/java/de/dhbwstuttgart/typeinference/unify/TypeUnifyTask.java b/src/main/java/de/dhbwstuttgart/typeinference/unify/TypeUnifyTask.java
index 73fddb07..04ffb57f 100644
--- a/src/main/java/de/dhbwstuttgart/typeinference/unify/TypeUnifyTask.java
+++ b/src/main/java/de/dhbwstuttgart/typeinference/unify/TypeUnifyTask.java
@@ -637,62 +637,17 @@ public class TypeUnifyTask extends RecursiveTask<Set<Set<UnifyPair>>>  {
 				 			  	 .next()
 				 			  	 .stream()
 				 			  	 .filter(x -> x.getGroundBasePair().getLhsType() instanceof PlaceholderType && 
-				 			  			 x.getRhsType() instanceof ReferenceType &&
+				 			  			! (x.getRhsType() instanceof PlaceholderType) &&
 				 			  			 x.getPairOp() == PairOperator.EQUALSDOT)
 				 			  	 .map(x -> 
 				 			  	 ((PlaceholderType)x.getGroundBasePair().getLhsType()).getVariance())
 				 			  	 .findAny();
-			//Fuer Operatorenaufrufe wird variance auf 2 gesetzt
+			//Fuer Operatorenaufrufe wird variance auf 2 gesetzt.
+			//da kein Receiver existiert also keon x.getGroundBasePair().getLhsType() instanceof PlaceholderType
 			//Es werden alle Elemente des Kartesischen Produkts abgearbeitet
 			variance = optVariance.isPresent() ? optVariance.get() : 2;
 		}
 
-		//if (variance == 1 && nextSetasList.size() > 1) {
-		//	List<Set<UnifyPair>> al = new ArrayList<>(nextSetasList.size());
-		//	for (int ii = 0; ii <  nextSetasList.size();ii++) {
-		//		al.add(0,nextSetasList.get(ii));
-		//	}
-		//	nextSetasList = al;
-		//}
-		//Set<UnifyPair> a = nextSetasListIt.next();
-		/*if (nextSetasList.size()>1) {zu loeschen
-			if (nextSetasList.iterator().next().iterator().next().getLhsType().getName().equals("D")) 
-				System.out.print("");
-			if (variance == 1) {
-				a_next = oup.max(nextSetasList.iterator());
-			}
-			else if (variance == -1) {
-				a_next = oup.min(nextSetasList.iterator());
-			}
-			else if (variance == 0) {
-				a_next = nextSetasList.iterator().next();
-			}
-		}
-		else {
-			a_next = nextSetasList.iterator().next();
-		}
-		*/
-		if (variance == 2) {
-			writeLog("VARIANCE2 " + nextSetasList.toString());
-			Set<UnifyPair> XX = nextSetasList.iterator()
-		  	 .next()
-		  	 .stream()
-		  	 .filter(x -> 
-		  	         x.getGroundBasePair().getLhsType() instanceof PlaceholderType && 
-		  			 ! (x.getRhsType() instanceof PlaceholderType) &&
-		  			 x.getPairOp() == PairOperator.EQUALSDOT)
-			.collect(Collectors.toCollection(HashSet::new));
-			
-			Set<Integer> sI = XX.stream() 
-		  	 .map(x -> 
-		  	 ((PlaceholderType)x.getGroundBasePair().getLhsType()).getVariance())
-		  	 .collect(Collectors.toCollection(HashSet::new));;
-		  	Optional<Integer> oI = sI.stream()
-		  	.findAny();
-		  	variance = oI.isPresent() ? oI.get() : 2;
-		  	 System.out.println("");
-		  	 
-		}
 		if (!nextSetasList.iterator().hasNext())
 			System.out.print("");
 		if (nextSetasList.iterator().next().stream().filter(x -> x.getLhsType().getName().equals("D")).findFirst().isPresent() && nextSetasList.size()>1) 
@@ -741,6 +696,8 @@ public class TypeUnifyTask extends RecursiveTask<Set<Set<UnifyPair>>>  {
 			List<Set<UnifyPair>> nextSetasListRest = new ArrayList<>();
 			//List<Set<UnifyPair>> nextSetasListRestMin = new ArrayList<>();
 			//List<Set<UnifyPair>> nextSetasListRestOder = new ArrayList<>();
+			writeLog("WhileAnfangNextSet: " + nextSet.toString());
+			writeLog("WhileAnfangNextSetasList: " + nextSetasList.toString());
 			if (variance == 1) {
 				a = oup.max(nextSetasList.iterator());
 				nextSetasList.remove(a);
diff --git a/src/main/java/de/dhbwstuttgart/typeinference/unify/model/OrderingUnifyPair.java b/src/main/java/de/dhbwstuttgart/typeinference/unify/model/OrderingUnifyPair.java
index 690e4c43..76383920 100644
--- a/src/main/java/de/dhbwstuttgart/typeinference/unify/model/OrderingUnifyPair.java
+++ b/src/main/java/de/dhbwstuttgart/typeinference/unify/model/OrderingUnifyPair.java
@@ -203,7 +203,7 @@ public class OrderingUnifyPair extends Ordering<Set<UnifyPair>> {
 
 		Set<UnifyPair> lefteqOder = left.stream()
 				.filter(x -> { UnifyPair y = x.getGroundBasePair();
-				try {
+				/*try {
 					((FiniteClosure)fc).logFile.write("leftBase: " + leftBase.toString() +"\n");
 					((FiniteClosure)fc).logFile.write("rightBase: " + rightBase.toString() +"\n\n");
 					((FiniteClosure)fc).logFile.write("left: " + left.toString() +"\n");
@@ -214,15 +214,15 @@ public class OrderingUnifyPair extends Ordering<Set<UnifyPair>> {
 					((FiniteClosure)fc).logFile.write("x.getPairOp(): " + x.getPairOp().toString() +"\n\n");
 					}
 					catch (IOException ie) {
-					}	
+					}	*/
 	               return (y.getLhsType() instanceof PlaceholderType && 
-	            		   y.getRhsType() instanceof ReferenceType && 
+	            		   !(y.getRhsType() instanceof PlaceholderType) && 
 	            		   x.getPairOp() == PairOperator.EQUALSDOT);})
 				.collect(Collectors.toCollection(HashSet::new));
 		Set<UnifyPair> righteqOder = right.stream()
 				.filter(x -> { UnifyPair y = x.getGroundBasePair(); 
 	               return (y.getLhsType() instanceof PlaceholderType && 
-	            		   y.getRhsType() instanceof ReferenceType && 
+	            		   !(y.getRhsType() instanceof PlaceholderType) && 
 	            		   x.getPairOp() == PairOperator.EQUALSDOT);})
 				.collect(Collectors.toCollection(HashSet::new));
 		Set<UnifyPair> lefteqRet = left.stream()
@@ -243,7 +243,7 @@ public class OrderingUnifyPair extends Ordering<Set<UnifyPair>> {
 				.collect(Collectors.toCollection(HashSet::new));
 		
 		
-		synchronized(this) {
+		/* synchronized(this) {
 					try {
 			((FiniteClosure)fc).logFile.write("leftBase: " + leftBase.toString() +"\n");
 			((FiniteClosure)fc).logFile.write("rightBase: " + rightBase.toString() +"\n\n");
@@ -260,6 +260,7 @@ public class OrderingUnifyPair extends Ordering<Set<UnifyPair>> {
 			catch (IOException ie) {
 			}
 		}
+		*/
 		
 
 		if (lefteqOder.size() == 1 && righteqOder.size() == 1 && lefteqRet.size() == 1 && righteqRet.size() == 1) {