diff --git a/src/main/java/de/dhbwstuttgart/typeinference/unify/TypeUnifyTask.java b/src/main/java/de/dhbwstuttgart/typeinference/unify/TypeUnifyTask.java
index d350077a..1acdeaa3 100644
--- a/src/main/java/de/dhbwstuttgart/typeinference/unify/TypeUnifyTask.java
+++ b/src/main/java/de/dhbwstuttgart/typeinference/unify/TypeUnifyTask.java
@@ -724,24 +724,8 @@ public class TypeUnifyTask extends RecursiveTask<Set<Set<UnifyPair>>>  {
 					}
 				}
 				
-				List<Set<UnifyPair>> maxElementsTest = oup.maxElements(nextSetasListRest);
 				//Alle maximale Elemente in  nextSetasListRest bestimmen
-				List<Set<UnifyPair>> nextSetasListRestTest;
-				do {
-					nextSetasListRestTest = new ArrayList<Set<UnifyPair>>(nextSetasListRest);
-					if (!nextSetasListRest.isEmpty()) {
-						Set<UnifyPair> max = oup.max(nextSetasListRest.iterator());
-						Iterator<Set<UnifyPair>> nextSetasListItRest2 = new ArrayList<Set<UnifyPair>>(nextSetasListRest).iterator();
-						while (nextSetasListItRest2.hasNext()) {
-							Set<UnifyPair> a_nextRest = nextSetasListItRest2.next();
-							if (//a.equals(a_next) || 
-									(oup.compare(max, a_nextRest) == 1)) {
-								nextSetasListRest.remove(a_nextRest);
-							}
-						
-						}}
-				} while(!nextSetasListRestTest.equals(nextSetasListRest));
-				writeLog("maxElementsTest: " + maxElementsTest.equals(nextSetasListRest));
+				nextSetasListRest = oup.maxElements(nextSetasListRest);
 			}
 			else if (variance == -1) {
 				a = oup.min(nextSetasList.iterator());
@@ -761,26 +745,8 @@ public class TypeUnifyTask extends RecursiveTask<Set<Set<UnifyPair>>>  {
 					}
 				}
 				//Alle minimalen Elemente in  nextSetasListRest bestimmen
-				writeLog("nextSetasListRest davor: " + nextSetasListRest);
-				List<Set<UnifyPair>> minElementsTest = oup.minElements(nextSetasListRest);
-					List<Set<UnifyPair>> nextSetasListRestTest;
-					do {
-						nextSetasListRestTest = new ArrayList<Set<UnifyPair>>(nextSetasListRest);
-						if (!nextSetasListRest.isEmpty()) {
-							Set<UnifyPair> min = oup.min(nextSetasListRest.iterator());
-							Iterator<Set<UnifyPair>> nextSetasListItRest2 = new ArrayList<Set<UnifyPair>>(nextSetasListRest).iterator();
-							while (nextSetasListItRest2.hasNext()) {
-								Set<UnifyPair> a_nextRest = nextSetasListItRest2.next();
-								if (//a.equals(a_next) || 
-										(oup.compare(min, a_nextRest) == -1)) {
-									nextSetasListRest.remove(a_nextRest);
-								}
-						
-							}}
-					} while(!nextSetasListRestTest.equals(nextSetasListRest));
-					writeLog("minElementsTest Vergleich: " + minElementsTest.equals(nextSetasListRest));
-					writeLog("minElementsTest danach: " + minElementsTest);
-					writeLog("nextSetasListRest danach: " + nextSetasListRest);
+				//writeLog("nextSetasListRest davor: " + nextSetasListRest);
+				nextSetasListRest = oup.minElements(nextSetasListRest);
 			}
 			else if (variance == 2) {
 				a = nextSetasList.remove(0);
@@ -1435,9 +1401,12 @@ public class TypeUnifyTask extends RecursiveTask<Set<Set<UnifyPair>>>  {
 							
 							//das kleineste Element ist das Element von dem a_new geerbt hat
 							//muss deshalb geloescht werden
-							Set<UnifyPair> min = oup.min(notErased.iterator());
-							notErased.remove(min);
-							notErased.remove(((Constraint<UnifyPair>)min).getExtendConstraint());
+							Iterator<Set<UnifyPair>> notErasedIt = notErased.iterator();
+							if (notErasedIt.hasNext()) {
+								Set<UnifyPair> min = oup.min(notErasedIt);
+								notErased.remove(min);
+								notErased.remove(((Constraint<UnifyPair>)min).getExtendConstraint());
+							}
 							
 							List<Set<UnifyPair>> erased = new ArrayList<>(greaterSetasList); 
 							erased.removeAll(notErased);
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 038f308e..a48db2aa 100644
--- a/src/main/java/de/dhbwstuttgart/typeinference/unify/model/FiniteClosure.java
+++ b/src/main/java/de/dhbwstuttgart/typeinference/unify/model/FiniteClosure.java
@@ -76,6 +76,7 @@ implements IFiniteClosure  {
 		// Build the transitive closure of the inheritance tree
 		for(UnifyPair pair : pairs) {
 			
+			/*
 			try { 
 				logFile.write("Pair: " + pair + "\n");
 				logFile.flush();
@@ -83,6 +84,7 @@ implements IFiniteClosure  {
 			catch (IOException e) {
 				System.err.println("no LogFile");
 			}
+			*/
 			
 			if(pair.getPairOp() != PairOperator.SMALLER)
 				continue;