diff --git a/src/main/java/de/dhbwstuttgart/typeinference/unify/RuleSet.java b/src/main/java/de/dhbwstuttgart/typeinference/unify/RuleSet.java
index 1a878aa4b..3e593e221 100644
--- a/src/main/java/de/dhbwstuttgart/typeinference/unify/RuleSet.java
+++ b/src/main/java/de/dhbwstuttgart/typeinference/unify/RuleSet.java
@@ -9,6 +9,7 @@ import java.util.Optional;
 import java.util.Queue;
 import java.util.Set;
 import java.util.Stack;
+import java.util.concurrent.ForkJoinPool;
 import java.util.function.Function;
 import java.util.stream.Collectors;
 
@@ -48,7 +49,7 @@ public class RuleSet implements IRuleSet{
 	
 	public RuleSet() {
 		super();
-		logFile = new WriterActiveObject(new OutputStreamWriter(new NullOutputStream()));
+		logFile = new WriterActiveObject(new OutputStreamWriter(new NullOutputStream()), ForkJoinPool.commonPool());
 	}
 	
 	RuleSet(WriterActiveObject logFile) {
diff --git a/src/main/java/de/dhbwstuttgart/typeinference/unify/TypeUnify.java b/src/main/java/de/dhbwstuttgart/typeinference/unify/TypeUnify.java
index f314d21e8..9efe8bc93 100644
--- a/src/main/java/de/dhbwstuttgart/typeinference/unify/TypeUnify.java
+++ b/src/main/java/de/dhbwstuttgart/typeinference/unify/TypeUnify.java
@@ -24,8 +24,8 @@ public class TypeUnify {
 	 * @return
 	 */
 	public Set<Set<UnifyPair>> unify(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, new WriterActiveObject(logFile), log, 0, ret, usedTasks);
-		ForkJoinPool pool = new ForkJoinPool();
+		ForkJoinPool pool = new ForkJoinPool(Runtime.getRuntime().availableProcessors(), ForkJoinPool.defaultForkJoinWorkerThreadFactory, null, true);
+		TypeUnifyTask unifyTask = new TypeUnifyTask(undConstrains, oderConstraints, fc, true, new WriterActiveObject(logFile, pool), log, 0, ret, usedTasks, pool);
 		pool.invoke(unifyTask);
 		Set<Set<UnifyPair>> res =  unifyTask.join();
 		try {
@@ -50,8 +50,8 @@ public class TypeUnify {
 	 * @return
 	 */
 	public UnifyResultModel unifyAsync(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, new WriterActiveObject(logFile), log, 0, ret, usedTasks);
-		ForkJoinPool pool = new ForkJoinPool();
+		ForkJoinPool pool = new ForkJoinPool(Runtime.getRuntime().availableProcessors(), ForkJoinPool.defaultForkJoinWorkerThreadFactory, null, true);
+		TypeUnifyTask unifyTask = new TypeUnifyTask(undConstrains, oderConstraints, fc, true, new WriterActiveObject(logFile, pool), log, 0, ret, usedTasks, pool);
 		pool.invoke(unifyTask);
 		return ret;
 	}
@@ -68,9 +68,10 @@ 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) {
+		ForkJoinPool pool = new ForkJoinPool(Runtime.getRuntime().availableProcessors(), ForkJoinPool.defaultForkJoinWorkerThreadFactory, null, true);
 		TypeUnifyTask unifyTask = //new TypeUnifyTask(undConstrains, oderConstraints, fc, true, logFile, log, 0, ret, usedTasks);
-				new TypeUnifyTask(undConstrains, oderConstraints, fc, true, new WriterActiveObject(logFile), log, 0, ret, usedTasks, statistics);
-		ForkJoinPool pool = new ForkJoinPool();
+				new TypeUnifyTask(undConstrains, oderConstraints, fc, true, new WriterActiveObject(logFile, pool), log, 0, ret, usedTasks, pool, statistics);
+
 		pool.invoke(unifyTask);
 		Set<Set<UnifyPair>> res =  unifyTask.join();
 		try {
@@ -104,7 +105,7 @@ public class TypeUnify {
 	 * @return
 	 */
 	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, new WriterActiveObject(logFile), log, 0, ret, usedTasks);
+		TypeUnifyTask unifyTask = new TypeUnifyTask(undConstrains, oderConstraints, fc, false, new WriterActiveObject(logFile, ForkJoinPool.commonPool()), log, 0, ret, usedTasks, ForkJoinPool.commonPool());
 		unifyTask.statisticsFile = statistics;
 		Set<Set<UnifyPair>> res = unifyTask.compute();
 		try {
diff --git a/src/main/java/de/dhbwstuttgart/typeinference/unify/TypeUnify2Task.java b/src/main/java/de/dhbwstuttgart/typeinference/unify/TypeUnify2Task.java
index f182851f4..5ed438db3 100644
--- a/src/main/java/de/dhbwstuttgart/typeinference/unify/TypeUnify2Task.java
+++ b/src/main/java/de/dhbwstuttgart/typeinference/unify/TypeUnify2Task.java
@@ -7,6 +7,7 @@ import java.util.ArrayList;
 import java.util.HashSet;
 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;
@@ -20,17 +21,17 @@ public class TypeUnify2Task extends TypeUnifyTask {
        Set<UnifyPair> methodSignatureConstraintUebergabe;
 
        //statistics
-       TypeUnify2Task(Set<Set<UnifyPair>> setToFlatten, Set<UnifyPair> eq, 
-    		   List<Set<Constraint<UnifyPair>>> oderConstraints, 
-    		   Set<UnifyPair> nextSetElement, 
-    		   IFiniteClosure fc, boolean parallel, WriterActiveObject 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 );
+       TypeUnify2Task(Set<Set<UnifyPair>> setToFlatten, Set<UnifyPair> eq,
+                      List<Set<Constraint<UnifyPair>>> oderConstraints,
+                      Set<UnifyPair> nextSetElement,
+                      IFiniteClosure fc, boolean parallel, WriterActiveObject logFile, Boolean log, int rekTiefe, UnifyResultModel urm, UnifyTaskModel usedTasks,
+                      Set<UnifyPair> methodSignatureConstraintUebergabe, ForkJoinPool pool, Writer statistics) {
+    	   this(setToFlatten, eq, oderConstraints, nextSetElement, fc, parallel, logFile, log, rekTiefe, urm, usedTasks, methodSignatureConstraintUebergabe, pool );
     	   
        }
        
-       public TypeUnify2Task(Set<Set<UnifyPair>> setToFlatten, Set<UnifyPair> eq, List<Set<Constraint<UnifyPair>>> oderConstraints, Set<UnifyPair> nextSetElement, IFiniteClosure fc, boolean parallel, WriterActiveObject logFile, Boolean log, int rekTiefe, UnifyResultModel urm, UnifyTaskModel usedTasks, Set<UnifyPair> methodSignatureConstraintUebergabe) {
-               super(eq, oderConstraints, fc, parallel, logFile, log, rekTiefe, urm, usedTasks);
+       public TypeUnify2Task(Set<Set<UnifyPair>> setToFlatten, Set<UnifyPair> eq, List<Set<Constraint<UnifyPair>>> oderConstraints, Set<UnifyPair> nextSetElement, IFiniteClosure fc, boolean parallel, WriterActiveObject logFile, Boolean log, int rekTiefe, UnifyResultModel urm, UnifyTaskModel usedTasks, Set<UnifyPair> methodSignatureConstraintUebergabe, ForkJoinPool pool) {
+               super(eq, oderConstraints, fc, parallel, logFile, log, rekTiefe, urm, usedTasks, pool);
                this.setToFlatten = setToFlatten;
                this.nextSetElement = nextSetElement;
                this.methodSignatureConstraintUebergabe = methodSignatureConstraintUebergabe;
diff --git a/src/main/java/de/dhbwstuttgart/typeinference/unify/TypeUnifyTask.java b/src/main/java/de/dhbwstuttgart/typeinference/unify/TypeUnifyTask.java
index e2ae03b17..58c6618e5 100644
--- a/src/main/java/de/dhbwstuttgart/typeinference/unify/TypeUnifyTask.java
+++ b/src/main/java/de/dhbwstuttgart/typeinference/unify/TypeUnifyTask.java
@@ -13,6 +13,7 @@ import java.util.List;
 import java.util.Map.Entry;
 import java.util.Optional;
 import java.util.Set;
+import java.util.concurrent.ForkJoinPool;
 import java.util.concurrent.RecursiveTask;
 import java.util.function.BiFunction;
 import java.util.function.BinaryOperator;
@@ -78,6 +79,7 @@ public class TypeUnifyTask extends RecursiveTask<Set<Set<UnifyPair>>>  {
 
 	public static final String rootDirectory = System.getProperty("user.dir")+"/test/logFiles/";
 	protected WriterActiveObject logFile;
+	protected ForkJoinPool pool;
 	/**
 	 * The implementation of setOps that will be used during the unification
 	 */
@@ -147,11 +149,11 @@ public class TypeUnifyTask extends RecursiveTask<Set<Set<UnifyPair>>>  {
 	*/
 	
 	//statistics
-	public TypeUnifyTask(Set<UnifyPair> eq, List<Set<Constraint<UnifyPair>>> oderConstraints, IFiniteClosure fc, boolean parallel, WriterActiveObject logFile, Boolean log, int rekTiefe, UnifyResultModel urm, UnifyTaskModel usedTasks, Writer statisticsFile) {
-		this(eq,oderConstraints,  fc,  parallel,  logFile,  log,  rekTiefe,  urm,  usedTasks);
+	public TypeUnifyTask(Set<UnifyPair> eq, List<Set<Constraint<UnifyPair>>> oderConstraints, IFiniteClosure fc, boolean parallel, WriterActiveObject logFile, Boolean log, int rekTiefe, UnifyResultModel urm, UnifyTaskModel usedTasks, ForkJoinPool pool, Writer statisticsFile) {
+		this(eq,oderConstraints,  fc,  parallel,  logFile,  log,  rekTiefe,  urm,  usedTasks, pool);
 		this.statisticsFile = statisticsFile;
 	}
-	public TypeUnifyTask(Set<UnifyPair> eq, List<Set<Constraint<UnifyPair>>> oderConstraints, IFiniteClosure fc, boolean parallel, WriterActiveObject logFile, Boolean log, int rekTiefe, UnifyResultModel urm, UnifyTaskModel usedTasks) {
+	public TypeUnifyTask(Set<UnifyPair> eq, List<Set<Constraint<UnifyPair>>> oderConstraints, IFiniteClosure fc, boolean parallel, WriterActiveObject logFile, Boolean log, int rekTiefe, UnifyResultModel urm, UnifyTaskModel usedTasks, ForkJoinPool pool) {
 			this.eq = eq;
 			//this.oderConstraints = oderConstraints.stream().map(x -> x.stream().map(y -> new HashSet<>(y)).collect(Collectors.toSet(HashSet::new))).collect(Collectors.toList(ArrayList::new));
 			this.oderConstraintsField = oderConstraints; /*.stream().map(x -> {
@@ -170,6 +172,7 @@ public class TypeUnifyTask extends RecursiveTask<Set<Set<UnifyPair>>>  {
 			this.parallel = parallel;
 			this.logFile = logFile;
 			this.log = log;
+			this.pool = pool;
 			
 			noOfThread++; 
 			totalnoOfThread++;
@@ -178,9 +181,9 @@ public class TypeUnifyTask extends RecursiveTask<Set<Set<UnifyPair>>>  {
 			writeLog("thNo2 " + thNo);
 			try {
 				if(log){
-					this.logFile = new WriterActiveObject(new FileWriter(new File(System.getProperty("user.dir") + "/logFiles/" + "Thread_"+thNo)));
+					this.logFile = new WriterActiveObject(new FileWriter(new File(System.getProperty("user.dir") + "/logFiles/" + "Thread_"+thNo)), pool);
 				}else{
-					this.logFile = new WriterActiveObject(new OutputStreamWriter(new NullOutputStream()));
+					this.logFile = new WriterActiveObject(new OutputStreamWriter(new NullOutputStream()), pool);
 				}
 				logFile.write("");
 			}
@@ -922,7 +925,7 @@ public class TypeUnifyTask extends RecursiveTask<Set<Set<UnifyPair>>>  {
 				newElemsOrig.add(a);
 				
 				/* FORK ANFANG */
-				TypeUnify2Task forkOrig = new TypeUnify2Task(newElemsOrig, newEqOrig, newOderConstraintsOrig, a, fc, parallel, logFile, log, rekTiefe, urm, usedTasks, methodSignatureConstraint);
+				TypeUnify2Task forkOrig = new TypeUnify2Task(newElemsOrig, newEqOrig, newOderConstraintsOrig, a, fc, parallel, logFile, log, rekTiefe, urm, usedTasks, methodSignatureConstraint, this.pool);
 				//forks.add(forkOrig);
 				synchronized(usedTasks) {
 					if (this.myIsCancelled()) {
@@ -960,7 +963,7 @@ public class TypeUnifyTask extends RecursiveTask<Set<Set<UnifyPair>>>  {
 					Set<Set<UnifyPair>> newElems = new HashSet<>(elems);
 					List<Set<Constraint<UnifyPair>>> newOderConstraints = new ArrayList<>(oderConstraints);
 					newElems.add(nSaL);
-					TypeUnify2Task fork = new TypeUnify2Task(newElems, newEq, newOderConstraints, nSaL, fc, parallel, logFile, log, rekTiefe, urm, usedTasks, new HashSet<>(methodSignatureConstraint));
+					TypeUnify2Task fork = new TypeUnify2Task(newElems, newEq, newOderConstraints, nSaL, fc, parallel, logFile, log, rekTiefe, urm, usedTasks, new HashSet<>(methodSignatureConstraint), this.pool);
 					forks.add(fork);
 					synchronized(usedTasks) {
 						if (this.myIsCancelled()) {
@@ -1024,7 +1027,7 @@ public class TypeUnifyTask extends RecursiveTask<Set<Set<UnifyPair>>>  {
 				newElemsOrig.add(a);
 				
 				/* FORK ANFANG */
-				TypeUnify2Task forkOrig = new TypeUnify2Task(newElemsOrig, newEqOrig, newOderConstraintsOrig, a, fc, parallel, logFile, log, rekTiefe, urm, usedTasks, new HashSet<>(methodSignatureConstraint));
+				TypeUnify2Task forkOrig = new TypeUnify2Task(newElemsOrig, newEqOrig, newOderConstraintsOrig, a, fc, parallel, logFile, log, rekTiefe, urm, usedTasks, new HashSet<>(methodSignatureConstraint), this.pool);
 				//forks.add(forkOrig);
 				synchronized(usedTasks) {
 					if (this.myIsCancelled()) {
@@ -1061,7 +1064,7 @@ public class TypeUnifyTask extends RecursiveTask<Set<Set<UnifyPair>>>  {
 					Set<Set<UnifyPair>> newElems = new HashSet<>(elems);
 					List<Set<Constraint<UnifyPair>>> newOderConstraints = new ArrayList<>(oderConstraints);
 					newElems.add(nSaL);
-					TypeUnify2Task fork = new TypeUnify2Task(newElems, newEq, newOderConstraints, nSaL, fc, parallel, logFile, log, rekTiefe, urm, usedTasks, new HashSet<>(methodSignatureConstraint));
+					TypeUnify2Task fork = new TypeUnify2Task(newElems, newEq, newOderConstraints, nSaL, fc, parallel, logFile, log, rekTiefe, urm, usedTasks, new HashSet<>(methodSignatureConstraint), this.pool);
 					forks.add(fork);
 					synchronized(usedTasks) {
 						if (this.myIsCancelled()) {
@@ -1126,7 +1129,7 @@ public class TypeUnifyTask extends RecursiveTask<Set<Set<UnifyPair>>>  {
 		    	newElemsOrig.add(a);
 				
 				/* FORK ANFANG */
-		    	TypeUnify2Task forkOrig = new TypeUnify2Task(newElemsOrig, newEqOrig, newOderConstraintsOrig, a, fc, parallel, logFile, log, rekTiefe, urm, usedTasks, new HashSet<>(methodSignatureConstraint));
+		    	TypeUnify2Task forkOrig = new TypeUnify2Task(newElemsOrig, newEqOrig, newOderConstraintsOrig, a, fc, parallel, logFile, log, rekTiefe, urm, usedTasks, new HashSet<>(methodSignatureConstraint), this.pool);
 		    	//forks.add(forkOrig);
 		    	synchronized(usedTasks) {
 					if (this.myIsCancelled()) {
@@ -1147,7 +1150,7 @@ public class TypeUnifyTask extends RecursiveTask<Set<Set<UnifyPair>>>  {
 		    		Set<Set<UnifyPair>> newElems = new HashSet<>(elems);
 		    		List<Set<Constraint<UnifyPair>>> newOderConstraints = new ArrayList<>(oderConstraints);
 		    		newElems.add(nSaL);
-		    		TypeUnify2Task fork = new TypeUnify2Task(newElems, newEq, newOderConstraints, nSaL, fc, parallel, logFile, log, rekTiefe, urm, usedTasks, methodSignatureConstraint);
+		    		TypeUnify2Task fork = new TypeUnify2Task(newElems, newEq, newOderConstraints, nSaL, fc, parallel, logFile, log, rekTiefe, urm, usedTasks, methodSignatureConstraint, this.pool);
 		    		forks.add(fork);
 		    		synchronized(usedTasks) {
 						if (this.myIsCancelled()) {
diff --git a/src/main/java/de/dhbwstuttgart/typeinference/unify/WriterActiveObject.java b/src/main/java/de/dhbwstuttgart/typeinference/unify/WriterActiveObject.java
index 7646a44b3..c8b6a7c5a 100644
--- a/src/main/java/de/dhbwstuttgart/typeinference/unify/WriterActiveObject.java
+++ b/src/main/java/de/dhbwstuttgart/typeinference/unify/WriterActiveObject.java
@@ -6,10 +6,11 @@ import java.util.concurrent.ForkJoinPool;
 
 public class WriterActiveObject {
     private Writer writer;
-    private ForkJoinPool pool = new ForkJoinPool(1, ForkJoinPool.defaultForkJoinWorkerThreadFactory, null, true);
+    private ForkJoinPool pool;
 
-    public WriterActiveObject(Writer writer){
+    public WriterActiveObject(Writer writer, ForkJoinPool pool){
         this.writer = writer;
+        this.pool = pool;
     }
 
     public void close(){