diff --git a/main.cpp b/main.cpp
index c274193..5f18860 100644
--- a/main.cpp
+++ b/main.cpp
@@ -208,7 +208,7 @@ int main(int argc, char *argv[]) {
     vector<pair<int, int>> neig = {make_pair(-1, 1),  make_pair(-1, 0),
                                    make_pair(-1, -1), make_pair(0, 1),
                                    make_pair(0, -1),  make_pair(1, 1),
-                                   make_pair(1, 0),   make_pair(1, -1)};
+                                   make_pair(1, 0),   make_pair(1, -1)};    
 
     ofstream csvfile;
     csvfile.open("performance.csv");
diff --git a/stencil.hpp b/stencil.hpp
index 56033da..7d4edae 100644
--- a/stencil.hpp
+++ b/stencil.hpp
@@ -35,7 +35,7 @@ template <typename T> class Stencil : public ff::ff_Map<Task<T>> {
                     std::vector<std::promise<Task<T> *> *> *OutputVector);
 
   private:
-    Task<T> *svc_helper(Task<T> *t);
+    Task<T> *svc_helper(Task<T> *t, int iterations);
     void constructor_helper(std::vector<std::pair<int, int>> neighborhood);
 
     std::function<T(std::vector<T>)> Convolution;
@@ -100,7 +100,7 @@ void Stencil<T>::constructor_helper(
 
 // svc function for fastflow library
 template <typename T> Task<T> *Stencil<T>::svc(Task<T> *task) {
-    task = svc_helper(task);
+    task = svc_helper(task, this->Iterations);
     ff::ff_node::ff_send_out(task);
     return this->GO_ON;
 }
@@ -112,9 +112,15 @@ Stencil<T>::operator()(std::vector<std::vector<T>> *matrix, int iterations) {
     if ((*matrix).size() == 0 || (*matrix)[0].size() == 0) {
         return matrix;
     }
-    Task<T> *task = new Task<T>(matrix, (*matrix).size(), (*matrix)[0].size());
-    task = svc_helper(task);
-    return task->VectorData;
+    std::vector<std::vector<T>> * arena = new std::vector<std::vector<T>>();
+    *arena = *matrix;
+
+    Task<T> *task = new Task<T>(arena, (*arena).size(), (*arena)[0].size());
+    task = svc_helper(task, iterations);
+
+    *matrix = *task->VectorData;
+    delete task;
+    return matrix;
 }
 
 // function for std thread
@@ -243,8 +249,8 @@ void Stencil<T>::sequential(
     }
 }
 
-template <typename T> Task<T> *Stencil<T>::svc_helper(Task<T> *task) {
-    int niter = Iterations;
+template <typename T> Task<T> *Stencil<T>::svc_helper(Task<T> *task, int iterations) {
+    int niter = iterations;
 
     std::vector<std::vector<T>> *arena = new std::vector<std::vector<T>>(0);
     *arena = *(task->VectorData);