#include "private.h"
+#include "unistd.h"
XBT_LOG_NEW_DEFAULT_SUBCATEGORY(mc_dfs, mc,
"Logging specific to MC DFS algorithm");
-
-extern xbt_fifo_t mc_snapshot_stack;
-mc_pairs_t mc_reached = NULL;
xbt_dynar_t initial_pairs = NULL;
int max_pair = 0;
-xbt_dynar_t list_pairs_reached = NULL;
-extern mc_snapshot_t initial_snapshot;
+xbt_dynar_t visited_pairs;
+xbt_dynar_t reached_pairs;
mc_pairs_t new_pair(mc_snapshot_t sn, mc_state_t sg, xbt_state_t st){
mc_pairs_t p = NULL;
p->system_state = sn;
p->automaton_state = st;
p->graph_state = sg;
- p->visited = 0;
p->num = max_pair;
max_pair++;
return p;
}
-void set_pair_visited(mc_pairs_t p){
- p->visited = 1;
+void set_pair_visited(mc_state_t gs, xbt_state_t as, int sc){
+
+ if(visited(gs, as, sc) == 0){
+ //XBT_DEBUG("New visited pair : graph=%p, automaton=%p", gs, as);
+ MC_SET_RAW_MEM;
+ mc_visited_pairs_t p = NULL;
+ p = xbt_new0(s_mc_visited_pairs_t, 1);
+ p->graph_state = gs;
+ p->automaton_state = as;
+ p->search_cycle = sc;
+ xbt_dynar_push(visited_pairs, &p);
+ MC_UNSET_RAW_MEM;
+ }
+
+ //XBT_DEBUG("New visited pair , length of visited pairs : %lu", xbt_dynar_length(visited_pairs));
}
-int pair_reached(xbt_dynar_t p, int num_pair){
- int n;
- unsigned int cursor = 0;
- xbt_dynar_foreach(p, cursor, n){
- if(n == num_pair)
- return 1;
+int reached(mc_state_t gs, xbt_state_t as ){
+
+ mc_reached_pairs_t rp = NULL;
+ unsigned int c= 0;
+ unsigned int i;
+ int different_process;
+
+ MC_SET_RAW_MEM;
+ xbt_dynar_foreach(reached_pairs, c, rp){
+ if(rp->automaton_state == as){
+ different_process=0;
+ for(i=0; i < gs->max_pid; i++){
+ if(gs->proc_status[i].state != rp->graph_state->proc_status[i].state){
+ different_process++;
+ }
+ }
+ if(different_process==0){
+ MC_UNSET_RAW_MEM;
+ return 1;
+ }
+ }
}
+ MC_UNSET_RAW_MEM;
return 0;
}
-void MC_dfs_init(xbt_automaton_t a){
+void set_pair_reached(mc_state_t gs, xbt_state_t as){
- mc_pairs_t mc_initial_pair = NULL;
- mc_state_t initial_graph_state = NULL;
- smx_process_t process;
+ if(reached(gs, as) == 0){
+ MC_SET_RAW_MEM;
+ mc_reached_pairs_t p = NULL;
+ p = xbt_new0(s_mc_reached_pairs_t, 1);
+ p->graph_state = gs;
+ p->automaton_state = as;
+ xbt_dynar_push(reached_pairs, &p);
+ //XBT_DEBUG("New reached pair : graph=%p, automaton=%p", gs, as);
+ MC_UNSET_RAW_MEM;
+ }
+}
+
+int visited(mc_state_t gs, xbt_state_t as, int sc){
+ unsigned int c = 0;
+ mc_visited_pairs_t p = NULL;
+ unsigned int i;
+ int different_process;
+
+ MC_SET_RAW_MEM;
+ xbt_dynar_foreach(visited_pairs, c, p){
+ if((p->automaton_state == as) && (p->search_cycle == sc)){
+ different_process=0;
+ for(i=0; i < gs->max_pid; i++){
+ if(gs->proc_status[i].state != p->graph_state->proc_status[i].state){
+ different_process++;
+ }
+ }
+ if(different_process==0){
+ MC_UNSET_RAW_MEM;
+ return 1;
+ }
+ }
+ }
+ MC_UNSET_RAW_MEM;
+ return 0;
+
+}
+
+void MC_dfs_init(xbt_automaton_t a){
+
+ XBT_DEBUG("**************************************************");
+ XBT_DEBUG("DFS init");
+ XBT_DEBUG("**************************************************");
+
+ mc_pairs_t mc_initial_pair;
+ mc_state_t initial_graph_state;
+ smx_process_t process;
+ mc_snapshot_t init_snapshot;
+
MC_wait_for_requests();
MC_SET_RAW_MEM;
- initial_snapshot = xbt_new0(s_mc_snapshot_t, 1);
- MC_take_snapshot(initial_snapshot);
+ init_snapshot = xbt_new0(s_mc_snapshot_t, 1);
+
initial_graph_state = MC_state_new();
xbt_swag_foreach(process, simix_global->process_list){
if(MC_process_is_enabled(process)){
}
}
- list_pairs_reached = xbt_dynar_new(sizeof(int), NULL);
+ visited_pairs = xbt_dynar_new(sizeof(mc_visited_pairs_t), NULL);
+ reached_pairs = xbt_dynar_new(sizeof(mc_reached_pairs_t), NULL);
- MC_UNSET_RAW_MEM;
+ MC_take_snapshot(init_snapshot);
+ MC_UNSET_RAW_MEM;
- //regarder dans l'automate toutes les transitions activables grâce à l'état initial du système -> donnera les états initiaux de la propriété consistants avec l'état initial du système
+
+ /* regarder dans l'automate toutes les transitions activables grâce à l'état initial du système
+ -> donnera les états initiaux de la propriété consistants avec l'état initial du système */
unsigned int cursor = 0;
- xbt_state_t state = NULL;
unsigned int cursor2 = 0;
+ xbt_state_t state = NULL;
int res;
- xbt_transition_t transition_succ = NULL;
- xbt_dynar_t elses = xbt_dynar_new(sizeof(xbt_transition_t), NULL);
- int enabled_transition = 0;
+ xbt_transition_t transition_succ;
+ xbt_dynar_t elses = xbt_dynar_new(sizeof(mc_pairs_t), NULL);
+ xbt_dynar_t successors = xbt_dynar_new(sizeof(mc_pairs_t), NULL);
+ // int enabled_transition = 0;
+ mc_pairs_t pair_succ;
xbt_dynar_foreach(a->states, cursor, state){
if(state->type == -1){
xbt_dynar_foreach(state->out, cursor2, transition_succ){
-
res = MC_automaton_evaluate_label(a, transition_succ->label);
if(res == 1){
MC_SET_RAW_MEM;
- mc_initial_pair = new_pair(initial_snapshot, initial_graph_state, transition_succ->dst);
- xbt_fifo_unshift(mc_snapshot_stack, mc_initial_pair);
- set_pair_visited(mc_initial_pair);
-
- MC_UNSET_RAW_MEM;
+ mc_initial_pair = new_pair(init_snapshot, initial_graph_state, transition_succ->dst);
+ xbt_dynar_push(successors, &mc_initial_pair);
- enabled_transition = 1;
+ //XBT_DEBUG("New initial successor");
- XBT_DEBUG(" ++++++++++++++++++ new initial pair +++++++++++++++++++");
+ MC_UNSET_RAW_MEM;
- MC_dfs(a, 0);
}else{
if(res == 2){
- xbt_dynar_push(elses,&transition_succ);
+
+ MC_SET_RAW_MEM;
+
+ mc_initial_pair = new_pair(init_snapshot, initial_graph_state, transition_succ->dst);
+ xbt_dynar_push(elses, &mc_initial_pair);
+
+ //XBT_DEBUG("New initial successor");
+
+ MC_UNSET_RAW_MEM;
}
}
}
}
}
- if(enabled_transition == 0){
- cursor2 = 0;
- xbt_dynar_foreach(elses, cursor, transition_succ){
-
+ if(xbt_dynar_length(successors) > 0){
+
+ cursor = 0;
+ xbt_dynar_foreach(successors, cursor, pair_succ){
MC_SET_RAW_MEM;
- mc_initial_pair = new_pair(initial_snapshot, initial_graph_state, transition_succ->dst);
- xbt_fifo_unshift(mc_snapshot_stack, mc_initial_pair);
- set_pair_visited(mc_initial_pair);
+ xbt_fifo_unshift(mc_snapshot_stack, pair_succ);
+
+ XBT_DEBUG("**************************************************");
+ XBT_DEBUG("Initial state=%p ", pair_succ);
+
+ MC_UNSET_RAW_MEM;
+
+ set_pair_visited(pair_succ->graph_state, pair_succ->automaton_state, 0);
+
+ if(cursor == 0)
+ MC_dfs(a, 0, 0);
+ else
+ MC_dfs(a, 0, 1);
- MC_UNSET_RAW_MEM;
+ }
+
+ }else{
+
+ if(xbt_dynar_length(elses) > 0){
+ cursor = 0;
+ xbt_dynar_foreach(elses, cursor, pair_succ){
+ MC_SET_RAW_MEM;
+
+ xbt_fifo_unshift(mc_snapshot_stack, pair_succ);
+
+ XBT_DEBUG("**************************************************");
+ XBT_DEBUG("Initial state=%p ", pair_succ);
+
+ MC_UNSET_RAW_MEM;
+
+ set_pair_visited(pair_succ->graph_state, pair_succ->automaton_state, 0);
+
+ if(cursor == 0)
+ MC_dfs(a, 0, 0);
+ else
+ MC_dfs(a, 0, 1);
+ }
+ }else{
+
+ XBT_DEBUG("No initial state !");
+
+ return;
+ }
+ }
+
+}
+
+
+
+void MC_dfs(xbt_automaton_t a, int search_cycle, int restore){
+
+
+ if(xbt_fifo_size(mc_snapshot_stack) == 0)
+ return;
+
+ if(restore == 1){
+ MC_restore_snapshot(((mc_pairs_t)xbt_fifo_get_item_content(xbt_fifo_get_first_item(mc_snapshot_stack)))->system_state);
+ MC_UNSET_RAW_MEM;
+ }
+
+
+ //XBT_DEBUG("Lpv length after restore snapshot: %lu", xbt_dynar_length(visited_pairs));
+
+ /* Get current state */
+ mc_pairs_t current_pair = (mc_pairs_t)xbt_fifo_get_item_content(xbt_fifo_get_first_item(mc_snapshot_stack));
+
+ XBT_DEBUG("**************************************************");
+ XBT_DEBUG("State : graph=%p, automaton=%p, %u interleave, stack size=%d", current_pair->graph_state, current_pair->automaton_state, MC_state_interleave_size(current_pair->graph_state), xbt_fifo_size(mc_snapshot_stack));
+ //XBT_DEBUG("Restore : %d", restore);
+
+
+ /* Update statistics */
+ //mc_stats->visited_states++;
+ //set_pair_visited(current_pair->graph_state, current_pair->automaton_state, search_cycle);
+
+ //sleep(1);
+
+ smx_process_t process = NULL;
+ int value;
+ mc_state_t next_graph_state = NULL;
+ smx_req_t req = NULL;
+ char *req_str;
+
+ mc_pairs_t pair_succ;
+ xbt_transition_t transition_succ;
+ unsigned int cursor;
+ int res;
+ //int enabled_transition = 0;
+
+ xbt_dynar_t elses = xbt_dynar_new(sizeof(mc_pairs_t), NULL);
+ xbt_dynar_t successors = xbt_dynar_new(sizeof(mc_pairs_t), NULL);
+
+ mc_pairs_t next_pair;
+ mc_snapshot_t next_snapshot;
+ mc_snapshot_t current_snapshot;
+
+ while((req = MC_state_get_request(current_pair->graph_state, &value)) != NULL){
+
+ //XBT_DEBUG("Current pair : %p (%u interleave)", current_pair, MC_state_interleave_size(current_pair->graph_state)+1);
+ //XBT_DEBUG("Visited pairs : %lu", xbt_dynar_length(visited_pairs));
+
+ MC_SET_RAW_MEM;
+ current_snapshot = xbt_new0(s_mc_snapshot_t, 1);
+ MC_take_snapshot(current_snapshot);
+ MC_UNSET_RAW_MEM;
+
- MC_dfs(a, 0);
+ /* Debug information */
+ if(XBT_LOG_ISENABLED(mc_dfs, xbt_log_priority_debug)){
+ req_str = MC_request_to_string(req, value);
+ XBT_DEBUG("Execute: %s", req_str);
+ xbt_free(req_str);
+ }
+
+ MC_state_set_executed_request(current_pair->graph_state, req, value);
+ //mc_stats->executed_transitions++;
+
+ /* Answer the request */
+ SIMIX_request_pre(req, value);
+
+ /* Wait for requests (schedules processes) */
+ MC_wait_for_requests();
+
+
+ /* Create the new expanded graph_state */
+ MC_SET_RAW_MEM;
+
+ next_graph_state = MC_state_new();
+
+ /* Get enabled process and insert it in the interleave set of the next graph_state */
+ xbt_swag_foreach(process, simix_global->process_list){
+ if(MC_process_is_enabled(process)){
+ MC_state_interleave_process(next_graph_state, process);
+ }
+ }
+
+ next_snapshot = xbt_new0(s_mc_snapshot_t, 1);
+ MC_take_snapshot(next_snapshot);
+
+ MC_UNSET_RAW_MEM;
+
+ xbt_dynar_reset(elses);
+ xbt_dynar_reset(successors);
+
+ cursor = 0;
+ xbt_dynar_foreach(current_pair->automaton_state->out, cursor, transition_succ){
+
+ res = MC_automaton_evaluate_label(a, transition_succ->label);
+
+ MC_SET_RAW_MEM;
+ next_pair = new_pair(next_snapshot,next_graph_state, transition_succ->dst);
+
+ //XBT_DEBUG("Next pair : %p", next_pair);
+
+ if(res == 1){ // enabled transition in automaton
+ xbt_dynar_push(successors, &next_pair);
+ //XBT_DEBUG("New Successors length : %lu", xbt_dynar_length(successors));
+ }else{
+ if(res == 2){
+ xbt_dynar_push(elses, &next_pair);
+ //XBT_DEBUG("New Elses length : %lu", xbt_dynar_length(elses));
+ }
+ }
+
+ MC_UNSET_RAW_MEM;
+ }
+
+
+ if((xbt_dynar_length(successors) == 0) && (xbt_dynar_length(elses) == 0) ){
+
+ MC_SET_RAW_MEM;
+ next_pair = new_pair(next_snapshot, next_graph_state, current_pair->automaton_state);
+ xbt_dynar_push(successors, &next_pair);
+ MC_UNSET_RAW_MEM;
+
}
+
+ //XBT_DEBUG("Successors length : %lu", xbt_dynar_length(successors));
+ //XBT_DEBUG("Elses length : %lu", xbt_dynar_length(elses));
+
+ if(xbt_dynar_length(successors) >0){
+
+ cursor = 0;
+ xbt_dynar_foreach(successors, cursor, pair_succ){
+
+ //XBT_DEBUG("Search visited pair : graph=%p, automaton=%p", pair_succ->graph_state, pair_succ->automaton_state);
+
+ if(visited(pair_succ->graph_state, pair_succ->automaton_state, search_cycle) == 0){
+
+ MC_SET_RAW_MEM;
+ xbt_fifo_unshift(mc_snapshot_stack, pair_succ);
+ MC_UNSET_RAW_MEM;
+
+ set_pair_visited(pair_succ->graph_state, pair_succ->automaton_state, search_cycle);
+ MC_dfs(a, search_cycle, 0);
+
+ if((search_cycle == 0) && (pair_succ->automaton_state->type == 1)){
+
+ /* mc_pairs_t first_item = (mc_pairs_t)xbt_fifo_get_item_content(xbt_fifo_get_first_item(mc_snapshot_stack)); */
+ /* if((first_item->graph_state != pair_succ->graph_state) || (first_item->automaton_state != pair_succ->automaton_state) ){ */
+ /* MC_SET_RAW_MEM; */
+ /* xbt_fifo_unshift(mc_snapshot_stack, pair_succ); */
+ /* MC_UNSET_RAW_MEM; */
+ /* } */
+
+ set_pair_reached(pair_succ->graph_state, pair_succ->automaton_state);
+ XBT_DEBUG("Acceptance state : graph=%p, automaton=%p", pair_succ->graph_state, pair_succ->automaton_state);
+ MC_dfs(a, 1, 0);
+ }
+ }else{
+ //XBT_DEBUG("Pair (graph=%p, automaton=%p) already visited !", pair_succ->graph_state, pair_succ->automaton_state );
+ set_pair_visited(pair_succ->graph_state, pair_succ->automaton_state, search_cycle);
+ }
+
+ }
+
+ }else{
+
+ cursor = 0;
+ xbt_dynar_foreach(elses, cursor, pair_succ){
+
+ //XBT_DEBUG("Search visited pair : graph=%p, automaton=%p", pair_succ->graph_state, pair_succ->automaton_state);
+
+ if(visited(pair_succ->graph_state, pair_succ->automaton_state, search_cycle) == 0){
+
+ MC_SET_RAW_MEM;
+ xbt_fifo_unshift(mc_snapshot_stack, pair_succ);
+ MC_UNSET_RAW_MEM;
+
+ set_pair_visited(pair_succ->graph_state, pair_succ->automaton_state, search_cycle);
+ MC_dfs(a, search_cycle, 0);
+
+ if((search_cycle == 0) && (pair_succ->automaton_state->type == 1)){
+
+ set_pair_reached(pair_succ->graph_state, pair_succ->automaton_state);
+ XBT_DEBUG("Acceptance state : graph state=%p, automaton state=%p",pair_succ->graph_state, pair_succ->automaton_state);
+ MC_dfs(a, 1, 0);
+
+ }
+ }else{
+ //XBT_DEBUG("Pair (graph=%p, automaton=%p) already visited !", pair_succ->graph_state, pair_succ->automaton_state );
+ /* Different graph_state */
+ set_pair_visited(pair_succ->graph_state, pair_succ->automaton_state, search_cycle);
+ }
+
+ }
+
+ }
+
+ if(MC_state_interleave_size(current_pair->graph_state) > 0){
+ MC_restore_snapshot(current_snapshot);
+ MC_UNSET_RAW_MEM;
+ //XBT_DEBUG("Snapshot restored");
+ }
+ }
+
+ if((search_cycle == 1) && (reached(current_pair->graph_state, current_pair->automaton_state) == 1)){
+ XBT_INFO("*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*");
+ XBT_INFO("| ACCEPTANCE CYCLE |");
+ XBT_INFO("*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*");
+ XBT_INFO("Counter-example that violates formula :");
+ MC_show_snapshot_stack(mc_snapshot_stack);
+ MC_dump_snapshot_stack(mc_snapshot_stack);
+ exit(0);
}
+ MC_SET_RAW_MEM;
+ xbt_fifo_shift(mc_snapshot_stack);
+ //XBT_DEBUG("State shifted in snapshot_stack, mc_snapshot_stack size=%d", xbt_fifo_size(mc_snapshot_stack));
+ MC_UNSET_RAW_MEM;
+
+
+}
+
+void MC_show_snapshot_stack(xbt_fifo_t stack){
+ int value;
+ mc_pairs_t pair;
+ xbt_fifo_item_t item;
+ smx_req_t req;
+ char *req_str = NULL;
+
+ for (item = xbt_fifo_get_last_item(stack);
+ (item ? (pair = (mc_pairs_t) (xbt_fifo_get_item_content(item)))
+ : (NULL)); item = xbt_fifo_get_prev_item(item)) {
+ req = MC_state_get_executed_request(pair->graph_state, &value);
+ if(req){
+ req_str = MC_request_to_string(req, value);
+ XBT_INFO("%s", req_str);
+ xbt_free(req_str);
+ }
+ }
}
+void MC_dump_snapshot_stack(xbt_fifo_t stack){
+
+}
+
+
int MC_automaton_evaluate_label(xbt_automaton_t a, xbt_exp_label_t l){
switch(l->type){
return 2;
break;
}
+ default :
+ return -1;
}
}
xbt_fifo_shift(stack_automaton_dfs);
}*/
-
-
-void MC_dfs(xbt_automaton_t a, int search_cycle){
-
- smx_process_t process = NULL;
- int value;
- mc_state_t state = NULL;
- mc_state_t next_graph_state = NULL;
- smx_req_t req = NULL;
- char *req_str;
-
- xbt_transition_t transition_succ = NULL;
- xbt_state_t successor = NULL;
- unsigned int cursor = 0;
- xbt_dynar_t elses = xbt_dynar_new(sizeof(xbt_transition_t), NULL);
- int res;
- int enabled_transition = 0;
-
- mc_pairs_t next_pair = NULL;
- mc_snapshot_t next_snapshot = NULL;
-
-
- /* Get current state */
- mc_pairs_t current_pair = (mc_pairs_t)xbt_fifo_get_item_content(xbt_fifo_get_first_item(mc_snapshot_stack));
-
- XBT_DEBUG("**************************************************");
- XBT_DEBUG("State=%p, %u interleave",current_pair->graph_state,MC_state_interleave_size(current_pair->graph_state));
-
- /* Update statistics */
- mc_stats->visited_states++;
-
- MC_restore_snapshot(current_pair->system_state);
- MC_UNSET_RAW_MEM;
-
- //FIXME : vérifier condition permettant d'avoir tous les successeurs possibles dans le graph
-
- while(req = MC_state_get_request(current_pair->graph_state, &value)){
-
- /* Debug information */
- if(XBT_LOG_ISENABLED(mc_dfs, xbt_log_priority_debug)){
- req_str = MC_request_to_string(req, value);
- XBT_DEBUG("Execute: %s", req_str);
- xbt_free(req_str);
- }
-
- MC_state_set_executed_request(current_pair->graph_state, req, value);
- mc_stats->executed_transitions++;
-
- /* Answer the request */
- SIMIX_request_pre(req, value);
-
- /* Wait for requests (schedules processes) */
- MC_wait_for_requests();
-
-
- /* Create the new expanded graph_state */
- MC_SET_RAW_MEM;
-
- next_graph_state = MC_state_new();
-
- /* Get an enabled process and insert it in the interleave set of the next graph_state */
- xbt_swag_foreach(process, simix_global->process_list){
- if(MC_process_is_enabled(process)){
- MC_state_interleave_process(next_graph_state, process);
- }
- }
-
- next_snapshot = xbt_new0(s_mc_snapshot_t, 1);
- MC_take_snapshot(next_snapshot);
-
- MC_UNSET_RAW_MEM;
-
- xbt_dynar_foreach(current_pair->automaton_state->out, cursor, transition_succ){
- successor = transition_succ->dst;
- res = MC_automaton_evaluate_label(a, transition_succ->label);
- if(res == 1){ // enabled transition
-
- MC_SET_RAW_MEM;
- next_pair = new_pair(next_snapshot, next_graph_state, successor);
-
- if((search_cycle == 1) && (pair_reached(list_pairs_reached, next_pair->num) == 1)){
- printf("\n-*-*-*-*-*-*- ACCEPTANCE CYCLE -*-*-*-*-*-*-\n");
- // afficher chemin menant au cycle d'acceptation
- exit(1);
- }
- if(next_pair->visited == 0){ // FIXME : tester avec search_cycle ?
- xbt_fifo_unshift(mc_snapshot_stack, next_pair);
- set_pair_visited(next_pair);
- MC_dfs(a, search_cycle);
- if((search_cycle == 0) && (next_pair->automaton_state->type == 1)){
- xbt_dynar_push(list_pairs_reached, &next_pair->num);
- MC_dfs(a, 1);
- }
- }
-
- MC_UNSET_RAW_MEM;
- enabled_transition = 1;
- }else{
- if(res == 2){
- xbt_dynar_push(elses,&transition_succ);
- }
- }
- }
-
- if(enabled_transition == 0){
- cursor = 0;
- xbt_dynar_foreach(elses, cursor, transition_succ){
- successor = transition_succ->dst;
- MC_SET_RAW_MEM;
- next_pair = new_pair(next_snapshot, next_graph_state, successor);
-
- if((search_cycle == 1) && (pair_reached(list_pairs_reached, next_pair->num) == 1)){
- printf("\n-*-*-*-*-*-*- ACCEPTANCE CYCLE -*-*-*-*-*-*-\n");
- // afficher chemin menant au cycle d'acceptation
- exit(1);
- }
- if(next_pair->visited == 0){ // FIXME : tester avec search_cycle ?
- xbt_fifo_unshift(mc_snapshot_stack, next_pair);
- set_pair_visited(next_pair);
- MC_dfs(a, search_cycle);
- if((search_cycle == 0) && (next_pair->automaton_state->type == 1)){
- xbt_dynar_push(list_pairs_reached, &next_pair->num);
- MC_dfs(a, 1);
- }
- }
-
- MC_UNSET_RAW_MEM;
- }
- }
-
- }
-
- xbt_fifo_shift(mc_snapshot_stack);
-
-}
