diff --git a/thickenings.c b/thickenings.c
index 4ca56e0..7794ded 100644
--- a/thickenings.c
+++ b/thickenings.c
@@ -631,7 +631,7 @@ typedef struct {
 
  */
 
-static long enumerate_tree(const enumeration_info_t *info, const bitvec_t *pos, const bitvec_t *neg, int next_neg, int already_known)
+static long enumerate_tree(const enumeration_info_t *info, const bitvec_t *pos, const bitvec_t *neg, int next_neg, int already_known, int level)
 {
   static long totcount = 0;
   bitvec_t newpos, newneg, known;
@@ -676,13 +676,76 @@ static long enumerate_tree(const enumeration_info_t *info, const bitvec_t *pos,
   }
 
   do {
-    count += enumerate_tree(info, &newpos, &newneg, next_next_neg, next_neg + 1);
+    count += enumerate_tree(info, &newpos, &newneg, next_next_neg, next_neg + 1, level + 1);
     next_next_neg = bv_next_zero(&known, next_next_neg + 1);
   } while(next_next_neg <= info->size/2);
 
+  // multiprocessing stuff
+  //  if(level == 3)
+  //    fprintf(stderr, "%d\n", count);
+
   return count;
 }
 
+void generate_principal_ideals(node_t *graph, int size, bitvec_t *pos, bitvec_t *neg, int *is_slim)
+{
+  queue_t queue;
+  int current;
+  edgelist_t *edge;
+
+  // generate principal ideals
+  int *principal = (int*)malloc(size*sizeof(int));
+  for(int i = 0; i < size; i++) {
+    memset(principal, 0, size*sizeof(int));
+    principal[i] = 1;
+    queue_init(&queue);
+    queue_put(&queue, i);
+    while((current = queue_get(&queue)) != -1)
+      for(edge = graph[current].bruhat_lower; edge; edge = edge->next)
+	if(!principal[edge->to]) {
+	  principal[edge->to] = 1;
+	  queue_put(&queue, edge->to);
+	}
+
+    // copy the first half into bitvectors
+    bv_clear(&pos[i]);
+    bv_clear(&neg[i]);
+    is_slim[i] = 1;
+    for(int j = 0; j < size/2; j++)
+      if(principal[j])
+	bv_set_bit(&pos[i], j);
+    for(int j = 0; j < size/2; j++)
+      if(principal[size - 1 - j]) {
+	bv_set_bit(&neg[i], j);
+	if(bv_get_bit(&pos[i], j))
+	  is_slim[i] = 0;
+      }
+
+#ifdef _DEBUG
+    if(is_slim[i]) {
+      fprintf(stderr, " ids: [0");
+      for(int j = 1; j < size; j++)
+	if(principal[j])
+	  fprintf(stderr, ", %d", graph[j].id);
+      fprintf(stderr, "]\n");
+    }
+#endif
+
+  }
+  free(principal);
+
+  // output principal ideals
+#ifdef _DEBUG
+  for(int i = 0; i < size; i++) {
+    fprintf(stderr, "%2d: ", i);
+    bv_print_nice(stderr, &pos[i], &neg[i], -1, size/2);
+    fprintf(stderr, "\n");
+  }
+  fprintf(stderr,"\n");
+#endif
+
+}
+
 /*
    enumerates all balanced ideals
 
@@ -696,12 +759,8 @@ static long enumerate_tree(const enumeration_info_t *info, const bitvec_t *pos,
 
 long enumerate_balanced_thickenings(node_t *graph, int size, void (*callback) (const bitvec_t *, int, void*), void *callback_data)
 {
-  signed char *level;
   long count = 0;
   enumeration_info_t info;
-  queue_t queue;
-  int current;
-  edgelist_t *edge;
 
   info.size = size;
   info.callback = callback;
@@ -720,63 +779,14 @@ long enumerate_balanced_thickenings(node_t *graph, int size, void (*callback) (c
   if(info.size > 128*BV_QWORD_RANK)
     return -1;
 
-  // generate principal ideals
-  int *principal = (int*)malloc(info.size*sizeof(int));
-  for(int i = 0; i < info.size; i++) {
-    memset(principal, 0, info.size*sizeof(int));
-    principal[i] = 1;
-    queue_init(&queue);
-    queue_put(&queue, i);
-    while((current = queue_get(&queue)) != -1)
-      for(edge = graph[current].bruhat_lower; edge; edge = edge->next)
-	if(!principal[edge->to]) {
-	  principal[edge->to] = 1;
-	  queue_put(&queue, edge->to);
-	}
-
-    // copy the first half into bitvectors
-    bv_clear(&info.principal_pos[i]);
-    bv_clear(&info.principal_neg[i]);
-    info.principal_is_slim[i] = 1;
-    for(int j = 0; j < info.size/2; j++)
-      if(principal[j])
-	bv_set_bit(&info.principal_pos[i], j);
-    for(int j = 0; j < info.size/2; j++)
-      if(principal[info.size - 1 - j]) {
-	bv_set_bit(&info.principal_neg[i], j);
-	if(bv_get_bit(&info.principal_pos[i], j))
-	  info.principal_is_slim[i] = 0;
-      }
-
-#ifdef _DEBUG
-    if(info.principal_is_slim[i]) {
-      fprintf(stderr, " ids: [0");
-      for(int j = 1; j < info.size; j++)
-	if(principal[j])
-	  fprintf(stderr, ", %d", graph[j].id);
-      fprintf(stderr, "]\n");
-    }
-#endif
-
-  }
-  free(principal);
-
-  // output principal ideals
-#ifdef _DEBUG
-  for(int i = 0; i < info.size; i++) {
-    fprintf(stderr, "%2d: ", i);
-    bv_print_nice(stderr, &info.principal_pos[i], &info.principal_neg[i], -1, info.size/2);
-    fprintf(stderr, "\n");
-  }
-  fprintf(stderr,"\n");
-#endif
+  generate_principal_ideals(graph, size, info.principal_pos, info.principal_neg, info.principal_is_slim);
 
   // enumerate balanced ideals
   bitvec_t pos, neg;
   bv_clear(&pos);
   bv_clear(&neg);
   for(int i = 0; i <= info.size/2; i++)
-    count += enumerate_tree(&info, &pos, &neg, i, 0);
+    count += enumerate_tree(&info, &pos, &neg, i, 0, 0);
 
   free(info.principal_is_slim);
   free(info.principal_pos);