X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/1f834c56a869248347fa4dd12a41ded689989935..633f3ab4f0f29940ea9759bfe3dc4f8ec37595e8:/src/mc/mc_liveness.c

diff --git a/src/mc/mc_liveness.c b/src/mc/mc_liveness.c
index 09ff4d2305..2cd817af5d 100644
--- a/src/mc/mc_liveness.c
+++ b/src/mc/mc_liveness.c
@@ -1,97 +1,123 @@
-#include "private.h"
+#include "mc_private.h"
 #include "unistd.h"
 
 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(mc_liveness, mc,
                                 "Logging specific to algorithms for liveness properties verification");
 
-xbt_fifo_t reached_pairs;
-xbt_fifo_t visited_pairs;
-xbt_fifo_t visited_pairs_hash;
+xbt_dynar_t reached_pairs;
+xbt_dynar_t reached_pairs_hash;
+xbt_dynar_t visited_pairs;
+xbt_dynar_t visited_pairs_hash;
 xbt_dynar_t successors;
 
+xbt_dynar_t hosts_table;
+
+
+/* fast implementation of djb2 algorithm */
+unsigned int hash_region(char *str, int str_len){
+
+  int c;
+  register unsigned int hash = 5381;
+
+  while (str_len--) {
+    c = *str++;
+    hash = ((hash << 5) + hash) + c;    /* hash * 33 + c */
+  }
+
+  return hash;
+
+}
+
 int snapshot_compare(mc_snapshot_t s1, mc_snapshot_t s2){
 
   
   if(s1->num_reg != s2->num_reg){
-    //XBT_DEBUG("Different num_reg (s1 = %d, s2 = %d)", s1->num_reg, s2->num_reg);
+    XBT_DEBUG("Different num_reg (s1 = %d, s2 = %d)", s1->num_reg, s2->num_reg);
     return 1;
   }
 
   int i;
+  int errors = 0;
 
   for(i=0 ; i< s1->num_reg ; i++){
 
     if(s1->regions[i]->type != s2->regions[i]->type){
-      //XBT_DEBUG("Different type of region");
-      return 1;
+      if(XBT_LOG_ISENABLED(mc_liveness, xbt_log_priority_debug)){
+	XBT_DEBUG("Different type of region");
+	errors++;
+      }else{
+	return 1;
+      }
     }
 
     switch(s1->regions[i]->type){
-    case 0:
-      if(s1->regions[i]->size != s2->regions[i]->size){
-	//XBT_DEBUG("Different size of heap (s1 = %Zu, s2 = %Zu)", s1->regions[i]->size, s2->regions[i]->size);
-	return 1;
-      }
-      if(s1->regions[i]->start_addr != s2->regions[i]->start_addr){
-	//XBT_DEBUG("Different start addr of heap (s1 = %p, s2 = %p)", s1->regions[i]->start_addr, s2->regions[i]->start_addr);
-	return 1;
-      }
-      if(mmalloc_compare_heap(s1->regions[i]->data, s2->regions[i]->data)){
-	//XBT_DEBUG("Different heap (mmalloc_compare)");
-	return 1; 
-      }
-      break;
-    case 1 :
-      if(s1->regions[i]->size != s2->regions[i]->size){
-	//XBT_DEBUG("Different size of libsimgrid (s1 = %Zu, s2 = %Zu)", s1->regions[i]->size, s2->regions[i]->size);
-	return 1;
-      }
-      if(s1->regions[i]->start_addr != s2->regions[i]->start_addr){
-	//XBT_DEBUG("Different start addr of libsimgrid (s1 = %p, s2 = %p)", s1->regions[i]->start_addr, s2->regions[i]->start_addr);
-	return 1;
-      }
-      if(memcmp(s1->regions[i]->data, s2->regions[i]->data, s1->regions[i]->size) != 0){
-    	//XBT_DEBUG("Different memcmp for data in libsimgrid");
-    	return 1;
-      }
-      break;
-    case 2:
+      case 0:
       if(s1->regions[i]->size != s2->regions[i]->size){
-	//XBT_DEBUG("Different size of program (s1 = %Zu, s2 = %Zu)", s1->regions[i]->size, s2->regions[i]->size);
-	return 1;
+	if(XBT_LOG_ISENABLED(mc_liveness, xbt_log_priority_debug)){
+	  XBT_DEBUG("Different size of heap (s1 = %zu, s2 = %zu)", s1->regions[i]->size, s2->regions[i]->size);
+	  errors++;
+	}else{
+	  return 1;
+	}
       }
       if(s1->regions[i]->start_addr != s2->regions[i]->start_addr){
-	//XBT_DEBUG("Different start addr of program (s1 = %p, s2 = %p)", s1->regions[i]->start_addr, s2->regions[i]->start_addr);
-	return 1;
+	if(XBT_LOG_ISENABLED(mc_liveness, xbt_log_priority_debug)){
+	  XBT_DEBUG("Different start addr of heap (s1 = %p, s2 = %p)", s1->regions[i]->start_addr, s2->regions[i]->start_addr);
+	  errors++;
+	}else{
+	  return 1;
+	}
       }
-      if(memcmp(s1->regions[i]->data, s2->regions[i]->data, s1->regions[i]->size) != 0){
-    	//XBT_DEBUG("Different memcmp for data in program");
-    	return 1;
+      if(mmalloc_compare_heap(s1->regions[i]->data, s2->regions[i]->data, std_heap)){
+	if(XBT_LOG_ISENABLED(mc_liveness, xbt_log_priority_debug)){
+	  XBT_DEBUG("Different heap (mmalloc_compare)");
+	  errors++; 
+	}else{
+	  return 1;
+	}
       }
       break;
-    case 3:
+      /*case 1 :
       if(s1->regions[i]->size != s2->regions[i]->size){
-	//XBT_DEBUG("Different size of stack (s1 = %Zu, s2 = %Zu)", s1->regions[i]->size, s2->regions[i]->size);
-	return 1;
+	if(XBT_LOG_ISENABLED(mc_liveness, xbt_log_priority_debug)){
+	  XBT_DEBUG("Different size of libsimgrid (s1 = %zu, s2 = %zu)", s1->regions[i]->size, s2->regions[i]->size);
+	  errors++;
+	}else{
+	  return 1;
+	}
       }
       if(s1->regions[i]->start_addr != s2->regions[i]->start_addr){
-	//XBT_DEBUG("Different start addr of stack (s1 = %p, s2 = %p)", s1->regions[i]->start_addr, s2->regions[i]->start_addr);
-	return 1;
+	if(XBT_LOG_ISENABLED(mc_liveness, xbt_log_priority_debug)){
+	  XBT_DEBUG("Different start addr of libsimgrid (s1 = %p, s2 = %p)", s1->regions[i]->start_addr, s2->regions[i]->start_addr);
+ 	  errors++;
+	}else{
+	  return 1;
+	}
       }
       if(memcmp(s1->regions[i]->data, s2->regions[i]->data, s1->regions[i]->size) != 0){
-    	//XBT_DEBUG("Different memcmp for data in stack");
-    	return 1;
+	if(XBT_LOG_ISENABLED(mc_liveness, xbt_log_priority_debug)){
+	  XBT_DEBUG("Different memcmp for data in libsimgrid");
+	  XBT_DEBUG("Size : %zu", s1->regions[i]->size);
+ 	  errors++;
+	}else{
+	  return 1;
+	}
       }
+      break;*/
+    default:
       break;
     }
   }
+
+  return (errors > 0);
+  
   
 }
 
 int reached(xbt_state_t st){
 
 
-  if(xbt_fifo_size(reached_pairs) == 0){
+  if(xbt_dynar_is_empty(reached_pairs)){
 
     return 0;
 
@@ -115,34 +141,35 @@ int reached(xbt_state_t st){
       xbt_dynar_push_as(prop_ato, int, res);
     }
 
-    int i=0;
-    xbt_fifo_item_t item = xbt_fifo_get_first_item(reached_pairs);
+    cursor = 0;
     mc_pair_reached_t pair_test = NULL;
 
-
-    while(i < xbt_fifo_size(reached_pairs) && item != NULL){
-
-      pair_test = (mc_pair_reached_t) xbt_fifo_get_item_content(item);
-      
-      if(pair_test != NULL){
-	if(automaton_state_compare(pair_test->automaton_state, st) == 0){
-	  if(propositional_symbols_compare_value(pair_test->prop_ato, prop_ato) == 0){
-	    if(snapshot_compare(sn, pair_test->system_state) == 0){
-
-	      MC_free_snapshot(sn);
-	      xbt_dynar_reset(prop_ato);
-	      xbt_free(prop_ato);
-	      MC_UNSET_RAW_MEM;
-	      return 1;
-	    }
-	  }
+    //xbt_dict_t current_rdv_points = SIMIX_get_rdv_points();
+     
+    xbt_dynar_foreach(reached_pairs, cursor, pair_test){
+      XBT_DEBUG("Pair reached #%d", cursor+1);
+      if(automaton_state_compare(pair_test->automaton_state, st) == 0){
+	if(propositional_symbols_compare_value(pair_test->prop_ato, prop_ato) == 0){
+	  //XBT_DEBUG("Rdv points size %d - %d", xbt_dict_length(pair_test->rdv_points), xbt_dict_length(current_rdv_points));
+	  //if(xbt_dict_length(pair_test->rdv_points) == xbt_dict_length(current_rdv_points)){
+	  //if(rdv_points_compare(pair_test->rdv_points, current_rdv_points) == 0){
+	      if(snapshot_compare(pair_test->system_state, sn) == 0){
+		MC_free_snapshot(sn);
+		xbt_dynar_reset(prop_ato);
+		xbt_free(prop_ato);
+		MC_UNSET_RAW_MEM;
+		return 1;
+	      }
+	      /* }
+	  }else{
+	    XBT_DEBUG("Different size of rdv points (%d - %d)",xbt_dict_length(pair_test->rdv_points), xbt_dict_length(current_rdv_points) );
+	    }*/
+	}else{
+	  XBT_DEBUG("Different values of propositional symbols");
 	}
+      }else{
+	XBT_DEBUG("Different automaton state");
       }
-
-      item = xbt_fifo_get_next_item(item);
-      
-      i++;
-
     }
 
     MC_free_snapshot(sn);
@@ -154,6 +181,167 @@ int reached(xbt_state_t st){
   }
 }
 
+int rdv_points_compare(xbt_dict_t d1, xbt_dict_t d2){ /* d1 = pair_test, d2 = current_pair */ 
+  
+   xbt_dict_cursor_t cursor_dict = NULL;
+   char *key;
+   char *data;
+   smx_rdv_t rdv1, rdv2;
+   xbt_fifo_item_t item1, item2;
+   smx_action_t action1, action2;
+   xbt_fifo_item_t item_req1, item_req2;
+   smx_simcall_t req1, req2;
+   int i=0;
+   int j=0;
+
+   xbt_dict_foreach(d1, cursor_dict, key, data){
+     rdv1 = (smx_rdv_t)data;
+     rdv2 = xbt_dict_get_or_null(d2, rdv1->name);
+     if(rdv2 == NULL){
+       XBT_DEBUG("Rdv point unknown");
+       return 1;
+     }else{
+       if(xbt_fifo_size(rdv1->comm_fifo) != xbt_fifo_size(rdv2->comm_fifo)){
+	 XBT_DEBUG("Different total of actions in mailbox \"%s\" (%d - %d)", rdv1->name, xbt_fifo_size(rdv1->comm_fifo),xbt_fifo_size(rdv2->comm_fifo) );
+	 return 1;
+       }else{
+	 
+	 XBT_DEBUG("Total of actions in mailbox \"%s\" : %d", rdv1->name, xbt_fifo_size(rdv1->comm_fifo)); 
+	 
+	 item1 = xbt_fifo_get_first_item(rdv1->comm_fifo);	
+	 item2 = xbt_fifo_get_first_item(rdv2->comm_fifo);
+
+	 while(i<xbt_fifo_size(rdv1->comm_fifo)){
+	   action1 = (smx_action_t) xbt_fifo_get_item_content(item1);
+	   action2 = (smx_action_t) xbt_fifo_get_item_content(item2);
+
+	   if(action1->type != action2->type){
+	     XBT_DEBUG("Different type of action");
+	     return 1;
+	   }
+
+	   if(action1->state != action2->state){
+	     XBT_DEBUG("Different state of action");
+	     return 1;
+	   }
+
+	   if(xbt_fifo_size(action1->simcalls) != xbt_fifo_size(action2->simcalls)){
+	     XBT_DEBUG("Different size of simcall list (%d - %d", xbt_fifo_size(action1->simcalls), xbt_fifo_size(action2->simcalls));
+	     return 1;
+	   }else{
+
+	     item_req1 = xbt_fifo_get_first_item(action1->simcalls);	
+	     item_req2 = xbt_fifo_get_first_item(action2->simcalls);
+
+	     while(j<xbt_fifo_size(action1->simcalls)){
+
+	       req1 = (smx_simcall_t) xbt_fifo_get_item_content(item_req1);
+	       req2 = (smx_simcall_t) xbt_fifo_get_item_content(item_req2);
+	       
+	       if(req1->call != req2->call){
+		 XBT_DEBUG("Different simcall call in simcalls of action (%d - %d)", req1->call, req2->call);
+		 return 1;
+	       }
+	       if(req1->issuer->pid != req2->issuer->pid){
+		 XBT_DEBUG("Different simcall issuer in simcalls of action (%lu- %lu)", req1->issuer->pid, req2->issuer->pid);
+		 return 1;
+	       }
+
+	       item_req1 = xbt_fifo_get_next_item(item_req1);	
+	       item_req2 = xbt_fifo_get_next_item(item_req2);
+	       j++;
+	       
+	     }
+	   }
+
+	   switch(action1->type){
+	   case 0: /* execution */
+	   case 1: /* parallel execution */
+	     if(strcmp(action1->execution.host->name, action2->execution.host->name) != 0)
+	       return 1;
+	     break;
+	   case 2: /* comm */
+	     if(action1->comm.type != action2->comm.type)
+	       return 1;
+	     //XBT_DEBUG("Type of comm : %d", action1->comm.type);
+	     
+	     switch(action1->comm.type){
+	     case 0: /* SEND */
+	       if(action1->comm.src_proc->pid != action2->comm.src_proc->pid)
+		 return 1;
+	       if(strcmp(action1->comm.src_proc->smx_host->name, action2->comm.src_proc->smx_host->name) != 0)
+		 return 1;
+	       break;
+	     case 1: /* RECEIVE */
+	       if(action1->comm.dst_proc->pid != action2->comm.dst_proc->pid)
+		 return 1;
+	       if(strcmp(action1->comm.dst_proc->smx_host->name, action2->comm.dst_proc->smx_host->name) != 0)
+		 return 1;
+	       break;
+	     case 2: /* READY */
+	       if(action1->comm.src_proc->pid != action2->comm.src_proc->pid)
+		 return 1;
+	       if(strcmp(action1->comm.src_proc->smx_host->name, action2->comm.src_proc->smx_host->name) != 0)
+		 return 1;
+	       if(action1->comm.dst_proc->pid != action2->comm.dst_proc->pid)
+		 return 1;
+	       if(strcmp(action1->comm.dst_proc->smx_host->name, action2->comm.dst_proc->smx_host->name) != 0)
+		 return 1;
+	       break;
+	     case 3: /* DONE */
+	       if(action1->comm.src_proc->pid != action2->comm.src_proc->pid)
+		 return 1;
+	       if(strcmp(action1->comm.src_proc->smx_host->name, action2->comm.src_proc->smx_host->name) != 0)
+		 return 1;
+	       if(action1->comm.dst_proc->pid != action2->comm.dst_proc->pid)
+		 return 1;
+	       if(strcmp(action1->comm.dst_proc->smx_host->name, action2->comm.dst_proc->smx_host->name) != 0)
+		 return 1;
+	       break;
+	       
+	     } /* end of switch on type of comm */
+	     
+	     if(action1->comm.refcount != action2->comm.refcount)
+	       return 1;
+	     if(action1->comm.detached != action2->comm.detached)
+	       return 1;
+	     if(action1->comm.rate != action2->comm.rate)
+	       return 1;
+	     if(action1->comm.task_size != action2->comm.task_size)
+	       return 1;
+	     if(action1->comm.src_buff != action2->comm.src_buff)
+	       return 1;
+	     if(action1->comm.dst_buff != action2->comm.dst_buff)
+	       return 1;
+	     if(action1->comm.src_data != action2->comm.src_data)
+	       return 1;
+	     if(action1->comm.dst_data != action2->comm.dst_data)
+	       return 1;
+	     
+	     break;
+	   case 3: /* sleep */
+	     if(strcmp(action1->sleep.host->name, action2->sleep.host->name) != 0)
+	       return 1;
+	     break;
+	   case 4: /* synchro */
+	     
+	     break;
+	   default:
+	     break;
+	   }
+
+	   item1 = xbt_fifo_get_next_item(item1);	
+	   item2 = xbt_fifo_get_next_item(item2);
+	   i++;
+	 }
+       }
+     }
+   }
+
+   return 0;
+   
+}
+
 void set_pair_reached(xbt_state_t st){
 
  
@@ -164,6 +352,7 @@ void set_pair_reached(xbt_state_t st){
   pair->automaton_state = st;
   pair->prop_ato = xbt_dynar_new(sizeof(int), NULL);
   pair->system_state = xbt_new0(s_mc_snapshot_t, 1);
+  //pair->rdv_points = xbt_dict_new();  
   MC_take_snapshot_liveness(pair->system_state);
 
   /* Get values of propositional symbols */
@@ -177,17 +366,159 @@ void set_pair_reached(xbt_state_t st){
     res = (*f)();
     xbt_dynar_push_as(pair->prop_ato, int, res);
   }
-  
-  xbt_fifo_unshift(reached_pairs, pair); 
+
+  /*xbt_dict_t rdv_points = SIMIX_get_rdv_points();
+
+  xbt_dict_cursor_t cursor_dict = NULL;
+  char *key;
+  char *data;
+  xbt_fifo_item_t item;
+  smx_action_t action;
+
+  xbt_dict_foreach(rdv_points, cursor_dict, key, data){
+    smx_rdv_t new_rdv = xbt_new0(s_smx_rvpoint_t, 1);
+    new_rdv->name = strdup(((smx_rdv_t)data)->name);
+    new_rdv->comm_fifo = xbt_fifo_new();
+    xbt_fifo_foreach(((smx_rdv_t)data)->comm_fifo, item, action, smx_action_t) {
+      smx_action_t a = xbt_new0(s_smx_action_t, 1);
+      memcpy(a, action, sizeof(s_smx_action_t));
+      xbt_fifo_push(new_rdv->comm_fifo, a);
+      XBT_DEBUG("New action (type = %d, state = %d) in mailbox \"%s\"", action->type, action->state, key);
+      if(action->type==2)
+	XBT_DEBUG("Type of communication : %d, Ref count = %d", action->comm.type, action->comm.refcount);
+    }
+    //new_rdv->comm_fifo = xbt_fifo_copy(((smx_rdv_t)data)->comm_fifo);
+    xbt_dict_set(pair->rdv_points, new_rdv->name, new_rdv, NULL);
+    }*/
+ 
+  xbt_dynar_push(reached_pairs, &pair); 
 
   MC_UNSET_RAW_MEM;
   
 }
 
+
+int reached_hash(xbt_state_t st){
+
+
+  if(xbt_dynar_is_empty(reached_pairs_hash)){
+
+    return 0;
+
+  }else{
+
+    MC_SET_RAW_MEM;
+
+    mc_snapshot_t sn = xbt_new0(s_mc_snapshot_t, 1);
+    MC_take_snapshot_liveness(sn);
+
+    int j;
+    unsigned int hash_regions[sn->num_reg];
+    for(j=0; j<sn->num_reg; j++){
+      hash_regions[j] = hash_region(sn->regions[j]->data, sn->regions[j]->size);
+    }
+
+
+    /* Get values of propositional symbols */
+    xbt_dynar_t prop_ato = xbt_dynar_new(sizeof(int), NULL);
+    unsigned int cursor = 0;
+    xbt_propositional_symbol_t ps = NULL;
+    int res;
+    int (*f)();
+
+    xbt_dynar_foreach(automaton->propositional_symbols, cursor, ps){
+      f = ps->function;
+      res = (*f)();
+      xbt_dynar_push_as(prop_ato, int, res);
+    }
+
+    mc_pair_reached_hash_t pair_test = NULL;
+
+    int region_diff = 0;
+
+    cursor = 0;
+
+    xbt_dynar_foreach(reached_pairs_hash, cursor, pair_test){
+
+      if(automaton_state_compare(pair_test->automaton_state, st) == 0){
+	if(propositional_symbols_compare_value(pair_test->prop_ato, prop_ato) == 0){
+	  for(j=0 ; j< sn->num_reg ; j++){
+	    if(hash_regions[j] != pair_test->hash_regions[j]){
+	      region_diff++;
+	    }
+	  }
+	  if(region_diff == 0){
+	    MC_free_snapshot(sn);
+	    xbt_dynar_reset(prop_ato);
+	    xbt_free(prop_ato);
+	    MC_UNSET_RAW_MEM;
+	    return 1;
+	  }else{
+	    XBT_DEBUG("Different snapshot");
+	  }
+	}else{
+	  XBT_DEBUG("Different values of propositional symbols");
+	}
+      }else{
+	XBT_DEBUG("Different automaton state");
+      }
+
+      region_diff = 0;
+    }
+    
+    MC_free_snapshot(sn);
+    xbt_dynar_reset(prop_ato);
+    xbt_free(prop_ato);
+    MC_UNSET_RAW_MEM;
+    return 0;
+    
+  }
+}
+
+void set_pair_reached_hash(xbt_state_t st){
+ 
+  MC_SET_RAW_MEM;
+
+  mc_snapshot_t sn = xbt_new0(s_mc_snapshot_t, 1);
+  MC_take_snapshot_liveness(sn);
+ 
+  mc_pair_reached_hash_t pair = NULL;
+  pair = xbt_new0(s_mc_pair_reached_hash_t, 1);
+  pair->automaton_state = st;
+  pair->prop_ato = xbt_dynar_new(sizeof(int), NULL);
+  pair->hash_regions = malloc(sizeof(unsigned int) * sn->num_reg);
+  
+  int i;
+
+  for(i=0 ; i< sn->num_reg ; i++){
+    pair->hash_regions[i] = hash_region(sn->regions[i]->data, sn->regions[i]->size);
+  }
+  
+  /* Get values of propositional symbols */
+  unsigned int cursor = 0;
+  xbt_propositional_symbol_t ps = NULL;
+  int res;
+  int (*f)();
+
+  xbt_dynar_foreach(automaton->propositional_symbols, cursor, ps){
+    f = ps->function;
+    res = (*f)();
+    xbt_dynar_push_as(pair->prop_ato, int, res);
+  }
+  
+  xbt_dynar_push(reached_pairs_hash, &pair);
+
+  MC_free_snapshot(sn);
+  
+  MC_UNSET_RAW_MEM;
+    
+}
+
+
 int visited(xbt_state_t st, int sc){
 
 
-  if(xbt_fifo_size(visited_pairs) == 0){
+  if(xbt_dynar_is_empty(visited_pairs)){
 
     return 0;
 
@@ -212,38 +543,34 @@ int visited(xbt_state_t st, int sc){
       xbt_dynar_push_as(prop_ato, int, res);
     }
 
-    int i=0;
-    xbt_fifo_item_t item = xbt_fifo_get_first_item(visited_pairs);
+    cursor = 0;
     mc_pair_visited_t pair_test = NULL;
 
-    while(i < xbt_fifo_size(visited_pairs) && item != NULL){
-
-      pair_test = (mc_pair_visited_t) xbt_fifo_get_item_content(item);
-      
-      if(pair_test != NULL){
-	if(pair_test->search_cycle == sc) {
-	  if(automaton_state_compare(pair_test->automaton_state, st) == 0){
-	    if(propositional_symbols_compare_value(pair_test->prop_ato, prop_ato) == 0){
-	      if(snapshot_compare(pair_test->system_state, sn) == 0){
+    xbt_dynar_foreach(visited_pairs, cursor, pair_test){
+      if(pair_test->search_cycle == sc) {
+	if(automaton_state_compare(pair_test->automaton_state, st) == 0){
+	  if(propositional_symbols_compare_value(pair_test->prop_ato, prop_ato) == 0){
+	    if(snapshot_compare(pair_test->system_state, sn) == 0){
 	    
-		MC_free_snapshot(sn);
-		xbt_dynar_reset(prop_ato);
-		xbt_free(prop_ato);
-		MC_UNSET_RAW_MEM;
-		
-		return 1;
-		  
+	      MC_free_snapshot(sn);
+	      xbt_dynar_reset(prop_ato);
+	      xbt_free(prop_ato);
+	      MC_UNSET_RAW_MEM;
 		
-	      }
+	      return 1;
+	
+	    }else{
+	      XBT_DEBUG("Different snapshot");
 	    }
+	  }else{
+	    XBT_DEBUG("Different values of propositional symbols"); 
 	  }
+	}else{
+	  XBT_DEBUG("Different automaton state");
 	}
+      }else{
+	XBT_DEBUG("Different value of search_cycle");
       }
-
-      item = xbt_fifo_get_next_item(item);
-      
-      i++;
-
     }
 
 
@@ -260,7 +587,7 @@ int visited(xbt_state_t st, int sc){
 int visited_hash(xbt_state_t st, int sc){
 
 
-  if(xbt_fifo_size(visited_pairs_hash) == 0){
+  if(xbt_dynar_is_empty(visited_pairs_hash)){
 
     return 0;
 
@@ -270,12 +597,16 @@ int visited_hash(xbt_state_t st, int sc){
 
     mc_snapshot_t sn = xbt_new0(s_mc_snapshot_t, 1);
     MC_take_snapshot_liveness(sn);
-   
-    int i, j;
-    
-    xbt_dynar_t prop_ato = xbt_dynar_new(sizeof(int), NULL);
 
+    int j;
+    unsigned int hash_regions[sn->num_reg];
+    for(j=0; j<sn->num_reg; j++){
+      hash_regions[j] = hash_region(sn->regions[j]->data, sn->regions[j]->size);
+    }
+
+    
     /* Get values of propositional symbols */
+    xbt_dynar_t prop_ato = xbt_dynar_new(sizeof(int), NULL);
     unsigned int cursor = 0;
     xbt_propositional_symbol_t ps = NULL;
     int res;
@@ -287,39 +618,43 @@ int visited_hash(xbt_state_t st, int sc){
       xbt_dynar_push_as(prop_ato, int, res);
     }
 
-    xbt_fifo_item_t item = xbt_fifo_get_first_item(visited_pairs_hash);
     mc_pair_visited_hash_t pair_test = NULL;
 
-    while(i < xbt_fifo_size(visited_pairs_hash) && item != NULL){
+    int region_diff = 0;
+    cursor = 0;
 
-      pair_test = (mc_pair_visited_hash_t) xbt_fifo_get_item_content(item);
-      
-      if(pair_test != NULL){
-	if(pair_test->search_cycle == sc) {
-	  if(automaton_state_compare(pair_test->automaton_state, st) == 0){
-	    if(propositional_symbols_compare_value(pair_test->prop_ato, prop_ato) == 0){
-	      for(j=0 ; j< sn->num_reg ; j++){
-		if(xbt_dict_get_or_null_ext(pair_test->hash_regions, sn->regions[j]->data, sn->regions[j]->size) == NULL){
-		  return 0;
-		}
+    xbt_dynar_foreach(visited_pairs_hash, cursor, pair_test){
+  
+      if(pair_test->search_cycle == sc) {
+	if(automaton_state_compare(pair_test->automaton_state, st) == 0){
+	  if(propositional_symbols_compare_value(pair_test->prop_ato, prop_ato) == 0){
+	    for(j=0 ; j< sn->num_reg ; j++){
+	      if(hash_regions[j] != pair_test->hash_regions[j]){
+		region_diff++;
 	      }
+	    }
+	    if(region_diff == 0){
 	      MC_free_snapshot(sn);
 	      xbt_dynar_reset(prop_ato);
 	      xbt_free(prop_ato);
 	      MC_UNSET_RAW_MEM;
 	      return 1;
+	    }else{
+	      XBT_DEBUG("Different snapshot");
 	    }
+	  }else{
+	    XBT_DEBUG("Different values of propositional symbols"); 
 	  }
+	}else{
+	  XBT_DEBUG("Different automaton state");
 	}
+      }else{
+	XBT_DEBUG("Different value of search_cycle");
       }
-
-      item = xbt_fifo_get_next_item(item);
       
-      i++;
-
+      region_diff = 0;
     }
-
-
+    
     MC_free_snapshot(sn);
     xbt_dynar_reset(prop_ato);
     xbt_free(prop_ato);
@@ -330,7 +665,6 @@ int visited_hash(xbt_state_t st, int sc){
 }
 
 void set_pair_visited_hash(xbt_state_t st, int sc){
-
  
   MC_SET_RAW_MEM;
 
@@ -342,22 +676,12 @@ void set_pair_visited_hash(xbt_state_t st, int sc){
   pair->automaton_state = st;
   pair->prop_ato = xbt_dynar_new(sizeof(int), NULL);
   pair->search_cycle = sc;
-  pair->hash_regions = xbt_dict_new();
+  pair->hash_regions = malloc(sizeof(unsigned int) * sn->num_reg);
   
-  int i = 0;
+  int i;
 
   for(i=0 ; i< sn->num_reg ; i++){
-    switch(sn->regions[i]->type){
-    case 0:
-      xbt_dict_set_ext(pair->hash_regions, sn->regions[i]->data, sn->regions[i]->size, "heap", NULL);
-      break;
-    case 1:
-      xbt_dict_set_ext(pair->hash_regions, sn->regions[i]->data, sn->regions[i]->size, "libsimgrid", NULL);
-      break;
-    case 2:
-      xbt_dict_set_ext(pair->hash_regions, sn->regions[i]->data, sn->regions[i]->size, "prog", NULL);
-      break;
-    }
+    pair->hash_regions[i] = hash_region(sn->regions[i]->data, sn->regions[i]->size);
   }
   
   /* Get values of propositional symbols */
@@ -372,13 +696,12 @@ void set_pair_visited_hash(xbt_state_t st, int sc){
     xbt_dynar_push_as(pair->prop_ato, int, res);
   }
   
-  xbt_fifo_unshift(visited_pairs_hash, pair);
+  xbt_dynar_push(visited_pairs_hash, &pair);
 
   MC_free_snapshot(sn);
   
   MC_UNSET_RAW_MEM;
-  
-  
+    
 }
 
 void set_pair_visited(xbt_state_t st, int sc){
@@ -407,7 +730,7 @@ void set_pair_visited(xbt_state_t st, int sc){
     xbt_dynar_push_as(pair->prop_ato, int, res);
   }
   
-  xbt_fifo_unshift(visited_pairs, pair);
+  xbt_dynar_push(visited_pairs, &pair);
   
   MC_UNSET_RAW_MEM;
   
@@ -445,9 +768,10 @@ int MC_automaton_evaluate_label(xbt_exp_label_t l){
   case 3 : { 
     unsigned int cursor = 0;
     xbt_propositional_symbol_t p = NULL;
+    int (*f)();
     xbt_dynar_foreach(automaton->propositional_symbols, cursor, p){
       if(strcmp(p->pred, l->u.predicat) == 0){
-	int (*f)() = p->function;
+	f = p->function;
 	return (*f)();
       }
     }
@@ -460,13 +784,11 @@ int MC_automaton_evaluate_label(xbt_exp_label_t l){
   }
   default : 
     return -1;
+    break;
   }
 }
 
 
-
-
-
 /********************* Double-DFS stateless *******************/
 
 void MC_pair_stateless_delete(mc_pair_stateless_t pair){
@@ -485,10 +807,10 @@ mc_pair_stateless_t new_pair_stateless(mc_state_t sg, xbt_state_t st, int r){
   return p;
 }
 
-void MC_ddfs_stateless_init(){
+void MC_ddfs_init(void){
 
   XBT_DEBUG("**************************************************");
-  XBT_DEBUG("Double-DFS stateless init");
+  XBT_DEBUG("Double-DFS init");
   XBT_DEBUG("**************************************************");
 
   mc_pair_stateless_t mc_initial_pair = NULL;
@@ -506,9 +828,10 @@ void MC_ddfs_stateless_init(){
     }
   }
 
-  reached_pairs = xbt_fifo_new(); 
-  //visited_pairs = xbt_fifo_new();
-  visited_pairs_hash = xbt_fifo_new();
+  reached_pairs = xbt_dynar_new(sizeof(mc_pair_reached_t), NULL);
+  //reached_pairs_hash = xbt_dynar_new(sizeof(mc_pair_reached_hash_t), NULL);
+  //visited_pairs = xbt_dynar_new(sizeof(mc_pair_visited_t), NULL);
+  visited_pairs_hash = xbt_dynar_new(sizeof(mc_pair_visited_hash_t), NULL);
   successors = xbt_dynar_new(sizeof(mc_pair_stateless_t), NULL);
 
   /* Save the initial state */
@@ -525,7 +848,7 @@ void MC_ddfs_stateless_init(){
       
       MC_SET_RAW_MEM;
       mc_initial_pair = new_pair_stateless(initial_graph_state, state, MC_state_interleave_size(initial_graph_state));
-      xbt_fifo_unshift(mc_stack_liveness_stateless, mc_initial_pair);
+      xbt_fifo_unshift(mc_stack_liveness, mc_initial_pair);
       MC_UNSET_RAW_MEM;
       
       if(cursor != 0){
@@ -533,24 +856,25 @@ void MC_ddfs_stateless_init(){
 	MC_UNSET_RAW_MEM;
       }
 
-      MC_ddfs_stateless(0);
+      MC_ddfs(0);
 
     }else{
       if(state->type == 2){
       
 	MC_SET_RAW_MEM;
 	mc_initial_pair = new_pair_stateless(initial_graph_state, state, MC_state_interleave_size(initial_graph_state));
-	xbt_fifo_unshift(mc_stack_liveness_stateless, mc_initial_pair);
+	xbt_fifo_unshift(mc_stack_liveness, mc_initial_pair);
 	MC_UNSET_RAW_MEM;
 
 	set_pair_reached(state);
-	
+	//set_pair_reached_hash(state);
+
 	if(cursor != 0){
 	  MC_restore_snapshot(initial_snapshot_liveness);
 	  MC_UNSET_RAW_MEM;
 	}
 	
-	MC_ddfs_stateless(1);
+	MC_ddfs(1);
 	
       }
     }
@@ -559,32 +883,32 @@ void MC_ddfs_stateless_init(){
 }
 
 
-void MC_ddfs_stateless(int search_cycle){
+void MC_ddfs(int search_cycle){
 
   smx_process_t process;
   mc_pair_stateless_t current_pair = NULL;
 
-  if(xbt_fifo_size(mc_stack_liveness_stateless) == 0)
+  if(xbt_fifo_size(mc_stack_liveness) == 0)
     return;
 
 
   /* Get current pair */
-  current_pair = (mc_pair_stateless_t)xbt_fifo_get_item_content(xbt_fifo_get_first_item(mc_stack_liveness_stateless));
+  current_pair = (mc_pair_stateless_t)xbt_fifo_get_item_content(xbt_fifo_get_first_item(mc_stack_liveness));
 
   /* Update current state in buchi automaton */
   automaton->current_state = current_pair->automaton_state;
 
  
-  XBT_DEBUG("********************* ( Depth = %d, search_cycle = %d )", xbt_fifo_size(mc_stack_liveness_stateless), search_cycle);
+  XBT_DEBUG("********************* ( Depth = %d, search_cycle = %d )", xbt_fifo_size(mc_stack_liveness), search_cycle);
   XBT_DEBUG("Pair : graph=%p, automaton=%p(%s), %u interleave", current_pair->graph_state, current_pair->automaton_state, current_pair->automaton_state->id, MC_state_interleave_size(current_pair->graph_state));
  
   mc_stats_pair->visited_pairs++;
 
-  //sleep(1);
+  sleep(1);
 
   int value;
   mc_state_t next_graph_state = NULL;
-  smx_req_t req = NULL;
+  smx_simcall_t req = NULL;
   char *req_str;
 
   xbt_transition_t transition_succ;
@@ -594,13 +918,13 @@ void MC_ddfs_stateless(int search_cycle){
   mc_pair_stateless_t next_pair = NULL;
   mc_pair_stateless_t pair_succ;
 
-  if(xbt_fifo_size(mc_stack_liveness_stateless) < MAX_DEPTH_LIVENESS){
+  if(xbt_fifo_size(mc_stack_liveness) < MAX_DEPTH_LIVENESS){
 
     //set_pair_visited(current_pair->automaton_state, search_cycle);
     set_pair_visited_hash(current_pair->automaton_state, search_cycle);
 
-    //XBT_DEBUG("Visited pairs : %d", xbt_fifo_size(visited_pairs));
-    //XBT_DEBUG("Visited pairs : %d", xbt_fifo_size(visited_pairs_hash));
+    //XBT_DEBUG("Visited pairs : %lu", xbt_dynar_length(visited_pairs));
+    XBT_DEBUG("Visited pairs : %lu", xbt_dynar_length(visited_pairs_hash));
 
     if(current_pair->requests > 0){
 
@@ -616,7 +940,7 @@ void MC_ddfs_stateless(int search_cycle){
 	MC_state_set_executed_request(current_pair->graph_state, req, value);   
     
 	/* Answer the request */
-	SIMIX_request_pre(req, value);
+	SIMIX_simcall_pre(req, value);
 
 	/* Wait for requests (schedules processes) */
 	MC_wait_for_requests();
@@ -672,96 +996,105 @@ void MC_ddfs_stateless(int search_cycle){
 	
 	xbt_dynar_foreach(successors, cursor, pair_succ){
 
-	  //if(!visited(pair_succ->automaton_state, search_cycle)){
-	  if(!visited_hash(pair_succ->automaton_state, search_cycle)){
-
-	    if(search_cycle == 1){
+	  if(search_cycle == 1){
 
-	      if((pair_succ->automaton_state->type == 1) || (pair_succ->automaton_state->type == 2)){ 
+	    if((pair_succ->automaton_state->type == 1) || (pair_succ->automaton_state->type == 2)){ 
 		      
-		if(reached(pair_succ->automaton_state) == 1){
-
-		  XBT_DEBUG("Next pair (depth = %d, %d interleave) already reached !", xbt_fifo_size(mc_stack_liveness_stateless) + 1, MC_state_interleave_size(pair_succ->graph_state));
+	      if(reached(pair_succ->automaton_state)){
+		//if(reached_hash(pair_succ->automaton_state)){
+	      
+		XBT_DEBUG("Next pair (depth = %d, %d interleave) already reached !", xbt_fifo_size(mc_stack_liveness) + 1, MC_state_interleave_size(pair_succ->graph_state));
 
-		  XBT_INFO("*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*");
-		  XBT_INFO("|             ACCEPTANCE CYCLE            |");
-		  XBT_INFO("*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*");
-		  XBT_INFO("Counter-example that violates formula :");
-		  MC_show_stack_liveness_stateless(mc_stack_liveness_stateless);
-		  MC_dump_stack_liveness_stateless(mc_stack_liveness_stateless);
-		  MC_print_statistics_pairs(mc_stats_pair);
-		  exit(0);
+		XBT_INFO("*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*");
+		XBT_INFO("|             ACCEPTANCE CYCLE            |");
+		XBT_INFO("*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*");
+		XBT_INFO("Counter-example that violates formula :");
+		MC_show_stack_liveness(mc_stack_liveness);
+		MC_dump_stack_liveness(mc_stack_liveness);
+		MC_print_statistics_pairs(mc_stats_pair);
+		exit(0);
 
-		}else{
+	      }else{
 
-		  XBT_DEBUG("Next pair (depth =%d) -> Acceptance pair : graph=%p, automaton=%p(%s)", xbt_fifo_size(mc_stack_liveness_stateless) + 1, pair_succ->graph_state, pair_succ->automaton_state, pair_succ->automaton_state->id);
+		XBT_DEBUG("Next pair (depth =%d) -> Acceptance pair : graph=%p, automaton=%p(%s)", xbt_fifo_size(mc_stack_liveness) + 1, pair_succ->graph_state, pair_succ->automaton_state, pair_succ->automaton_state->id);
 	      
-		  set_pair_reached(pair_succ->automaton_state); 
+		set_pair_reached(pair_succ->automaton_state);
+		//set_pair_reached_hash(pair_succ->automaton_state);
 
-		  XBT_DEBUG("Reached pairs : %d", xbt_fifo_size(reached_pairs));
+		XBT_DEBUG("Reached pairs : %lu", xbt_dynar_length(reached_pairs));
+		//XBT_DEBUG("Reached pairs : %lu", xbt_dynar_length(reached_pairs_hash));
 
-		}
+		MC_SET_RAW_MEM;
+		xbt_fifo_unshift(mc_stack_liveness, pair_succ);
+		MC_UNSET_RAW_MEM;
+		
+		MC_ddfs(search_cycle);
 
 	      }
 
 	    }else{
-	  
-	      if(((pair_succ->automaton_state->type == 1) || (pair_succ->automaton_state->type == 2))){
 
-		XBT_DEBUG("Next pair (depth =%d) -> Acceptance pair : graph=%p, automaton=%p(%s)", xbt_fifo_size(mc_stack_liveness_stateless) + 1, pair_succ->graph_state, pair_succ->automaton_state, pair_succ->automaton_state->id);
-	    
-		set_pair_reached(pair_succ->automaton_state); 
-	      
-		search_cycle = 1;
+	      if(!visited_hash(pair_succ->automaton_state, search_cycle)){
+		//if(!visited(pair_succ->automaton_state, search_cycle)){
+		
+		MC_SET_RAW_MEM;
+		xbt_fifo_unshift(mc_stack_liveness, pair_succ);
+		MC_UNSET_RAW_MEM;
+		
+		MC_ddfs(search_cycle);
+		
+	      }else{
 
-		XBT_DEBUG("Reached pairs : %d", xbt_fifo_size(reached_pairs));
+		XBT_DEBUG("Next pair already visited ! ");
 
 	      }
-
+	      
 	    }
 
-	    MC_SET_RAW_MEM;
-	    xbt_fifo_unshift(mc_stack_liveness_stateless, pair_succ);
-	    MC_UNSET_RAW_MEM;
-
-	    MC_ddfs_stateless(search_cycle);
+	  }else{
+	  
+	    if(((pair_succ->automaton_state->type == 1) || (pair_succ->automaton_state->type == 2))){
 
-	    /* Restore system before checking others successors */
-	    if(cursor != (xbt_dynar_length(successors) - 1))
-	      MC_replay_liveness(mc_stack_liveness_stateless, 1);
-	
-	}else{
+	      XBT_DEBUG("Next pair (depth =%d) -> Acceptance pair : graph=%p, automaton=%p(%s)", xbt_fifo_size(mc_stack_liveness) + 1, pair_succ->graph_state, pair_succ->automaton_state, pair_succ->automaton_state->id);
 	    
-	    XBT_DEBUG("Next pair already visited");
+	      set_pair_reached(pair_succ->automaton_state); 
+	      //set_pair_reached_hash(pair_succ->automaton_state);
 
-	    if(search_cycle == 1){
+	      search_cycle = 1;
 
-	      if((pair_succ->automaton_state->type == 1) || (pair_succ->automaton_state->type == 2)){ 
-		      
-		if(reached(pair_succ->automaton_state) == 1){
+	      XBT_DEBUG("Reached pairs : %lu", xbt_dynar_length(reached_pairs));
+	      //XBT_DEBUG("Reached pairs : %lu", xbt_dynar_length(reached_pairs_hash));
 
-		  XBT_DEBUG("Next pair (depth = %d, %d interleave) already reached !", xbt_fifo_size(mc_stack_liveness_stateless) + 1, MC_state_interleave_size(pair_succ->graph_state));
+	    }
 
-		  XBT_INFO("*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*");
-		  XBT_INFO("|             ACCEPTANCE CYCLE            |");
-		  XBT_INFO("*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*");
-		  XBT_INFO("Counter-example that violates formula :");
-		  MC_show_stack_liveness_stateless(mc_stack_liveness_stateless);
-		  MC_dump_stack_liveness_stateless(mc_stack_liveness_stateless);
-		  MC_print_statistics_pairs(mc_stats_pair);
-		  exit(0);
+	    if(!visited_hash(pair_succ->automaton_state, search_cycle)){
+	      //if(!visited(pair_succ->automaton_state, search_cycle)){
+	      
+	      MC_SET_RAW_MEM;
+	      xbt_fifo_unshift(mc_stack_liveness, pair_succ);
+	      MC_UNSET_RAW_MEM;
+	      
+	      MC_ddfs(search_cycle);
+	      
+	    }else{
 
-		}
+	      XBT_DEBUG("Next pair already visited ! ");
 
-	      }
 	    }
-	    
-	}
+
 	  }
 
+	 
+	  /* Restore system before checking others successors */
+	  if(cursor != (xbt_dynar_length(successors) - 1))
+	    MC_replay_liveness(mc_stack_liveness, 1);
+	
+	  
+	}
+
 	if(MC_state_interleave_size(current_pair->graph_state) > 0){
-	  XBT_DEBUG("Backtracking to depth %u", xbt_fifo_size(mc_stack_liveness_stateless));
-	  MC_replay_liveness(mc_stack_liveness_stateless, 0);
+	  XBT_DEBUG("Backtracking to depth %u", xbt_fifo_size(mc_stack_liveness));
+	  MC_replay_liveness(mc_stack_liveness, 0);
 	}
       }
 
@@ -811,90 +1144,97 @@ void MC_ddfs_stateless(int search_cycle){
      
       xbt_dynar_foreach(successors, cursor, pair_succ){
 
-	//if(!visited(pair_succ->automaton_state, search_cycle)){
-	if(!visited_hash(pair_succ->automaton_state, search_cycle)){
+	if(search_cycle == 1){
 
-	  if(search_cycle == 1){
+	  if((pair_succ->automaton_state->type == 1) || (pair_succ->automaton_state->type == 2)){ 
 
-	    if((pair_succ->automaton_state->type == 1) || (pair_succ->automaton_state->type == 2)){ 
+	    if(reached(pair_succ->automaton_state)){
+	      //if(reached_hash(pair_succ->automaton_state)){
 
-	      if(reached(pair_succ->automaton_state) == 1){
+	      XBT_DEBUG("Next pair (depth = %d) already reached !", xbt_fifo_size(mc_stack_liveness) + 1);
 
-		XBT_DEBUG("Next pair (depth = %d) already reached !", xbt_fifo_size(mc_stack_liveness_stateless) + 1);
+	      XBT_INFO("*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*");
+	      XBT_INFO("|             ACCEPTANCE CYCLE            |");
+	      XBT_INFO("*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*");
+	      XBT_INFO("Counter-example that violates formula :");
+	      MC_show_stack_liveness(mc_stack_liveness);
+	      MC_dump_stack_liveness(mc_stack_liveness);
+	      MC_print_statistics_pairs(mc_stats_pair);
+	      exit(0);
 
-		XBT_INFO("*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*");
-		XBT_INFO("|             ACCEPTANCE CYCLE            |");
-		XBT_INFO("*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*");
-		XBT_INFO("Counter-example that violates formula :");
-		MC_show_stack_liveness_stateless(mc_stack_liveness_stateless);
-		MC_dump_stack_liveness_stateless(mc_stack_liveness_stateless);
-		MC_print_statistics_pairs(mc_stats_pair);
-		exit(0);
-
-	      }else{
+	    }else{
 
-		XBT_DEBUG("Next pair (depth =%d) -> Acceptance pair : graph=%p, automaton=%p(%s)", xbt_fifo_size(mc_stack_liveness_stateless) + 1, pair_succ->graph_state, pair_succ->automaton_state, pair_succ->automaton_state->id);
+	      XBT_DEBUG("Next pair (depth = %d) -> Acceptance pair : graph=%p, automaton=%p(%s)", xbt_fifo_size(mc_stack_liveness) + 1, pair_succ->graph_state, pair_succ->automaton_state, pair_succ->automaton_state->id);
 	      
-		set_pair_reached(pair_succ->automaton_state); 
+	      set_pair_reached(pair_succ->automaton_state);
+	      //set_pair_reached_hash(pair_succ->automaton_state);
 		
-		XBT_DEBUG("Reached pairs : %d", xbt_fifo_size(reached_pairs));
+	      XBT_DEBUG("Reached pairs : %lu", xbt_dynar_length(reached_pairs));
+	      //XBT_DEBUG("Reached pairs : %lu", xbt_dynar_length(reached_pairs_hash));
 
-	      }
+	      MC_SET_RAW_MEM;
+	      xbt_fifo_unshift(mc_stack_liveness, pair_succ);
+	      MC_UNSET_RAW_MEM;
+	      
+	      MC_ddfs(search_cycle);
 
 	    }
 
 	  }else{
-	  
-	    if(((pair_succ->automaton_state->type == 1) || (pair_succ->automaton_state->type == 2))){
 
-	      set_pair_reached(pair_succ->automaton_state); 
-	    	    
-	      search_cycle = 1;
+	    if(!visited_hash(pair_succ->automaton_state, search_cycle)){
+	      //if(!visited(pair_succ->automaton_state, search_cycle)){
 
-	      XBT_DEBUG("Reached pairs : %d", xbt_fifo_size(reached_pairs));
+	      MC_SET_RAW_MEM;
+	      xbt_fifo_unshift(mc_stack_liveness, pair_succ);
+	      MC_UNSET_RAW_MEM;
+	      
+	      MC_ddfs(search_cycle);
+	      
+	    }else{
 
-	    }
+	      XBT_DEBUG("Next pair already visited ! ");
 
+	    }
 	  }
+	    
 
-	  MC_SET_RAW_MEM;
-	  xbt_fifo_unshift(mc_stack_liveness_stateless, pair_succ);
-	  MC_UNSET_RAW_MEM;
+	}else{
+	    
+	  if(((pair_succ->automaton_state->type == 1) || (pair_succ->automaton_state->type == 2))){
 
-	  MC_ddfs_stateless(search_cycle);
+	    set_pair_reached(pair_succ->automaton_state);
+	    //set_pair_reached_hash(pair_succ->automaton_state);
+	    	    
+	    search_cycle = 1;
 
-	  /* Restore system before checking others successors */
-	  if(cursor != xbt_dynar_length(successors) - 1)
-	    MC_replay_liveness(mc_stack_liveness_stateless, 1);
+	    XBT_DEBUG("Reached pairs : %lu", xbt_dynar_length(reached_pairs));
+	    //XBT_DEBUG("Reached pairs : %lu", xbt_dynar_length(reached_pairs_hash));
 
-	  }else{
+	  }
+
+	  if(!visited_hash(pair_succ->automaton_state, search_cycle)){
+	    //if(!visited(pair_succ->automaton_state, search_cycle)){
+
+	    MC_SET_RAW_MEM;
+	    xbt_fifo_unshift(mc_stack_liveness, pair_succ);
+	    MC_UNSET_RAW_MEM;
+	    
+	    MC_ddfs(search_cycle);
 	    
-	  XBT_DEBUG("Next pair already visited");
+	  }else{
 
-	  if(search_cycle == 1){
+	    XBT_DEBUG("Next pair already visited ! ");
 
-	    if((pair_succ->automaton_state->type == 1) || (pair_succ->automaton_state->type == 2)){ 
-	      
-	      if(reached(pair_succ->automaton_state) == 1){
-		
-		XBT_DEBUG("Next pair (depth = %d, %d interleave) already reached !", xbt_fifo_size(mc_stack_liveness_stateless) + 1, MC_state_interleave_size(pair_succ->graph_state));
-		
-		XBT_INFO("*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*");
-		XBT_INFO("|             ACCEPTANCE CYCLE            |");
-		XBT_INFO("*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*");
-		XBT_INFO("Counter-example that violates formula :");
-		MC_show_stack_liveness_stateless(mc_stack_liveness_stateless);
-		MC_dump_stack_liveness_stateless(mc_stack_liveness_stateless);
-		MC_print_statistics_pairs(mc_stats_pair);
-		exit(0);
-		  
-	      }
-		
-	    }
-	      
 	  }
+
 	}
-	  
+
+	/* Restore system before checking others successors */
+	if(cursor != xbt_dynar_length(successors) - 1)
+	  MC_replay_liveness(mc_stack_liveness, 1);
+
+	 
       }
            
     }
@@ -905,21 +1245,21 @@ void MC_ddfs_stateless(int search_cycle){
 
   }
 
-  if(xbt_fifo_size(mc_stack_liveness_stateless) == MAX_DEPTH_LIVENESS ){
-    XBT_DEBUG("Pair (graph=%p, automaton =%p, search_cycle = %u, depth = %d) shifted in stack, maximum depth reached", current_pair->graph_state, current_pair->automaton_state, search_cycle, xbt_fifo_size(mc_stack_liveness_stateless) );
+  if(xbt_fifo_size(mc_stack_liveness) == MAX_DEPTH_LIVENESS ){
+    XBT_DEBUG("Pair (graph=%p, automaton =%p, search_cycle = %u, depth = %d) shifted in stack, maximum depth reached", current_pair->graph_state, current_pair->automaton_state, search_cycle, xbt_fifo_size(mc_stack_liveness) );
   }else{
-    XBT_DEBUG("Pair (graph=%p, automaton =%p, search_cycle = %u, depth = %d) shifted in stack", current_pair->graph_state, current_pair->automaton_state, search_cycle, xbt_fifo_size(mc_stack_liveness_stateless) );
+    XBT_DEBUG("Pair (graph=%p, automaton =%p, search_cycle = %u, depth = %d) shifted in stack", current_pair->graph_state, current_pair->automaton_state, search_cycle, xbt_fifo_size(mc_stack_liveness) );
   }
 
   
   MC_SET_RAW_MEM;
-  xbt_fifo_shift(mc_stack_liveness_stateless);
+  xbt_fifo_shift(mc_stack_liveness);
   if((current_pair->automaton_state->type == 1) || (current_pair->automaton_state->type == 2)){
-    xbt_fifo_shift(reached_pairs);
+    xbt_dynar_pop(reached_pairs, NULL);
+    //xbt_dynar_pop(reached_pairs_hash, NULL);
   }
   MC_UNSET_RAW_MEM;
   
   
 
 }
-