diff --git a/src/main.c b/src/main.c
index 25575a1..aae3b30 100644
--- a/src/main.c
+++ b/src/main.c
@@ -16,7 +16,7 @@
 #define HEIGHT (1200)
 #define SIM_WIDTH (800)
 #define SIM_HEIGHT (600)
-#define N_SIMULATION (1000)
+#define N_SIMULATION (100)
 
 const int FPS = 60;
 const int FRAME_DELAY = 1000 / FPS;
@@ -116,7 +116,8 @@ int main(int argc, char* argv[]) {
         printf("Simulation with %d iteration, duration : %.6f s\n",
                N_SIMULATION, elapsed);
     }
-
+    if (flags.multithread)
+        destroy_threads(threads, n_threads, ta);
     free_board(b);
     free(ta);
     free(threads);