"Logging specific to algorithms for liveness properties verification");
xbt_dynar_t initial_pairs = NULL;
-int max_pair = 0;
-xbt_dynar_t reached_pairs;
+xbt_fifo_t reached_pairs;
+xbt_dynar_t successors = NULL;
extern mc_snapshot_t initial_snapshot;
-mc_pair_t new_pair(mc_snapshot_t sn, mc_state_t sg, xbt_state_t st){
- mc_pair_t p = NULL;
- p = xbt_new0(s_mc_pair_t, 1);
- p->system_state = sn;
- p->automaton_state = st;
- p->graph_state = sg;
- p->num = max_pair;
- max_pair++;
- mc_stats_pair->expanded_pairs++;
- return p;
-
-}
+int snapshot_compare(mc_snapshot_t s1, mc_snapshot_t s2){
-int reached(mc_pair_t pair){
+ XBT_DEBUG("Compare snapshot");
+
+ if(s1->num_reg != s2->num_reg){
+ XBT_DEBUG("Different num_reg");
+ return 1;
+ }
- char* hash_reached = malloc(sizeof(char)*160);
- unsigned int c= 0;
+ int i;
+ int errors = 0;
- MC_SET_RAW_MEM;
- char *hash = malloc(sizeof(char)*160);
- xbt_sha((char *)&pair, hash);
- xbt_dynar_foreach(reached_pairs, c, hash_reached){
- if(strcmp(hash, hash_reached) == 0){
- MC_UNSET_RAW_MEM;
+ for(i=0 ; i< s1->num_reg ; i++){
+
+ if(s1->regions[i]->size != s2->regions[i]->size){
+ XBT_DEBUG("Different size of region");
+ return 1;
+ }
+
+ if(s1->regions[i]->start_addr != s2->regions[i]->start_addr){
+ XBT_DEBUG("Different start addr of region");
+ return 1;
+ }
+
+ if(s1->regions[i]->type != s2->regions[i]->type){
+ XBT_DEBUG("Different type of region");
return 1;
}
+
+
+ if(s1->regions[i]->type == 0){
+ if(mmalloc_compare_heap(s1->regions[i]->start_addr, s2->regions[i]->start_addr)){
+ XBT_DEBUG("Different heap (mmalloc_compare)");
+ errors++;
+ }
+ }else{
+ if(memcmp(s1->regions[i]->data, s2->regions[i]->data, s1->regions[i]->size) != 0){
+ XBT_DEBUG("Different memcmp for data in libsimgrid or program");
+ errors++;
+ }
+ }
+
+
}
-
- MC_UNSET_RAW_MEM;
- return 0;
+
+ return (errors>0);
+
}
-void set_pair_reached(mc_pair_t pair){
+int reached(xbt_automaton_t a, xbt_state_t st, mc_snapshot_t s){
+
+
+ if(xbt_fifo_size(reached_pairs) == 0){
+
+ return 0;
+
+ }else{
- if(reached(pair) == 0){
MC_SET_RAW_MEM;
- char *hash = malloc(sizeof(char)*160) ;
- xbt_sha((char *)&pair, hash);
- xbt_dynar_push(reached_pairs, &hash);
+
+ xbt_dynar_t prop_ato = xbt_dynar_new(sizeof(int), NULL);
+
+ /* Get values of propositional symbols */
+ unsigned int cursor = 0;
+ xbt_propositional_symbol_t ps = NULL;
+ xbt_dynar_foreach(a->propositional_symbols, cursor, ps){
+ int (*f)() = ps->function;
+ int res = (*f)();
+ xbt_dynar_push_as(prop_ato, int, res);
+ }
+
+
+
+ int i=0;
+ xbt_fifo_item_t item = xbt_fifo_get_first_item(reached_pairs);
+ mc_pair_reached_t pair_test = NULL;
+
+ while(i < xbt_fifo_size(reached_pairs)){
+
+ pair_test = (mc_pair_reached_t) xbt_fifo_get_item_content(item);
+
+ 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(s, pair_test->system_state) == 0){
+ MC_UNSET_RAW_MEM;
+ return 1;
+ }
+ }
+ }
+
+ item = xbt_fifo_get_next_item(item);
+
+ i++;
+
+ }
+
MC_UNSET_RAW_MEM;
+ return 0;
+
}
+}
+
+void set_pair_reached(xbt_automaton_t a, xbt_state_t st, mc_snapshot_t sn){
+
+
+ MC_SET_RAW_MEM;
+
+ mc_pair_reached_t pair = NULL;
+ pair = xbt_new0(s_mc_pair_reached_t, 1);
+ pair->automaton_state = st;
+ pair->prop_ato = xbt_dynar_new(sizeof(int), NULL);
+ pair->system_state = sn;
+ /* Get values of propositional symbols */
+ unsigned int cursor = 0;
+ xbt_propositional_symbol_t ps = NULL;
+ xbt_dynar_foreach(a->propositional_symbols, cursor, ps){
+ int (*f)() = ps->function;
+ int res = (*f)();
+ xbt_dynar_push_as(pair->prop_ato, int, res);
+ }
+
+ xbt_fifo_unshift(reached_pairs, pair);
+
+ MC_UNSET_RAW_MEM;
+
+
}
void MC_pair_delete(mc_pair_t pair){
}
+
int MC_automaton_evaluate_label(xbt_automaton_t a, xbt_exp_label_t l){
switch(l->type){
-/******************************* DFS with visited state *******************************/
-xbt_dynar_t visited_pairs;
-void set_pair_visited(mc_pair_t pair, int sc){
-
- MC_SET_RAW_MEM;
- mc_visited_pair_t p = NULL;
- p = xbt_new0(s_mc_visited_pair_t, 1);
- p->pair = pair;
- p->search_cycle = sc;
- char *hash = malloc(sizeof(char)*160);
- xbt_sha((char *)&p, hash);
- xbt_dynar_push(visited_pairs, &hash);
- MC_UNSET_RAW_MEM;
+/********************* Double-DFS stateless *******************/
+void MC_pair_stateless_delete(mc_pair_stateless_t pair){
+ xbt_free(pair->graph_state->proc_status);
+ xbt_free(pair->graph_state);
+ //xbt_free(pair->automaton_state); -> FIXME : à implémenter
+ xbt_free(pair);
}
-int visited(mc_pair_t pair, int sc){
-
- char* hash_visited = malloc(sizeof(char)*160);
- unsigned int c= 0;
-
- MC_SET_RAW_MEM;
- mc_visited_pair_t p = NULL;
- p = xbt_new0(s_mc_visited_pair_t, 1);
- p->pair = pair;
- p->search_cycle = sc;
- char *hash = malloc(sizeof(char)*160);
- xbt_sha((char *)&p, hash);
- xbt_dynar_foreach(visited_pairs, c, hash_visited){
- if(strcmp(hash, hash_visited) == 0){
- MC_UNSET_RAW_MEM;
- return 1;
- }
- }
-
- MC_UNSET_RAW_MEM;
- return 0;
-
+mc_pair_stateless_t new_pair_stateless(mc_state_t sg, xbt_state_t st, int r){
+ mc_pair_stateless_t p = NULL;
+ p = xbt_new0(s_mc_pair_stateless_t, 1);
+ p->automaton_state = st;
+ p->graph_state = sg;
+ p->requests = r;
+ mc_stats_pair->expanded_pairs++;
+ return p;
}
-
-void MC_vddfs_stateful_init(xbt_automaton_t a){
+void MC_ddfs_stateless_init(xbt_automaton_t a, char *prgm){
XBT_DEBUG("**************************************************");
- XBT_DEBUG("Double-DFS stateful with visited state init");
+ XBT_DEBUG("Double-DFS stateless init");
XBT_DEBUG("**************************************************");
- mc_pair_t mc_initial_pair;
- mc_state_t initial_graph_state;
+ mc_pair_stateless_t mc_initial_pair = NULL;
+ mc_state_t initial_graph_state = NULL;
smx_process_t process;
- mc_snapshot_t init_snapshot;
MC_wait_for_requests();
MC_SET_RAW_MEM;
- init_snapshot = xbt_new0(s_mc_snapshot_t, 1);
-
initial_graph_state = MC_state_pair_new();
xbt_swag_foreach(process, simix_global->process_list){
if(MC_process_is_enabled(process)){
}
}
- visited_pairs = xbt_dynar_new(sizeof(char *), NULL);
- reached_pairs = xbt_dynar_new(sizeof(char *), NULL);
+ reached_pairs = xbt_fifo_new();
+ successors = xbt_dynar_new(sizeof(mc_pair_stateless_t), NULL);
+ //snapshot = xbt_new0(s_mc_snapshot_t, 1);
- MC_take_snapshot(init_snapshot);
+ initial_snapshot = xbt_new0(s_mc_snapshot_t, 1);
+ MC_take_snapshot_liveness(initial_snapshot, prgm);
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 */
-
unsigned int cursor = 0;
- unsigned int cursor2 = 0;
- xbt_state_t state = NULL;
- int res;
- xbt_transition_t transition_succ;
- xbt_dynar_t successors = xbt_dynar_new(sizeof(mc_pair_t), NULL);
- mc_pair_t pair_succ;
+ xbt_state_t state;
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) || (res == 2)){
-
- MC_SET_RAW_MEM;
-
- mc_initial_pair = new_pair(init_snapshot, initial_graph_state, transition_succ->dst);
- xbt_dynar_push(successors, &mc_initial_pair);
-
- MC_UNSET_RAW_MEM;
-
- }
+
+ 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);
+ MC_UNSET_RAW_MEM;
+
+ if(cursor != 0){
+ MC_restore_snapshot(initial_snapshot);
+ MC_UNSET_RAW_MEM;
}
- }
- }
- cursor = 0;
+ MC_ddfs_stateless(a, 0, 0, prgm);
- if(xbt_dynar_length(successors) == 0){
- xbt_dynar_foreach(a->states, cursor, state){
- if(state->type == -1){
+ }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);
+ MC_UNSET_RAW_MEM;
- mc_initial_pair = new_pair(init_snapshot, initial_graph_state, transition_succ->dst);
- xbt_dynar_push(successors, &mc_initial_pair);
+ set_pair_reached(a, state, initial_snapshot);
+
+ if(cursor != 0){
+ MC_restore_snapshot(initial_snapshot);
+ MC_UNSET_RAW_MEM;
+ }
+
+ MC_ddfs_stateless(a, 1, 0, prgm);
- MC_UNSET_RAW_MEM;
}
}
- }
-
- cursor = 0;
- xbt_dynar_foreach(successors, cursor, pair_succ){
- MC_SET_RAW_MEM;
-
- xbt_fifo_unshift(mc_stack_liveness_stateful, pair_succ);
- set_pair_visited(pair_succ, 0);
+ }
- MC_UNSET_RAW_MEM;
-
- if(cursor == 0){
- MC_vddfs_stateful(a, 0, 0);
- }else{
- MC_vddfs_stateful(a, 0, 1);
- }
- }
}
-void MC_vddfs_stateful(xbt_automaton_t a, int search_cycle, int restore){
+void MC_ddfs_stateless(xbt_automaton_t a, int search_cycle, int replay, char *prgm){
- smx_process_t process = NULL;
+ smx_process_t process;
+ mc_pair_stateless_t current_pair = NULL;
+ mc_snapshot_t snapshot = NULL;
-
- if(xbt_fifo_size(mc_stack_liveness_stateful) == 0)
+ if(xbt_fifo_size(mc_stack_liveness_stateless) == 0)
return;
- if(restore == 1){
- MC_restore_snapshot(((mc_pair_t)xbt_fifo_get_item_content(xbt_fifo_get_first_item(mc_stack_liveness_stateful)))->system_state);
- MC_UNSET_RAW_MEM;
- }
-
-
- /* Get current state */
- mc_pair_t current_pair = (mc_pair_t)xbt_fifo_get_item_content(xbt_fifo_get_first_item(mc_stack_liveness_stateful));
-
- if(restore==1){
+ if(replay == 1){
+ MC_replay_liveness(mc_stack_liveness_stateless, 0);
+ current_pair = (mc_pair_stateless_t)xbt_fifo_get_item_content(xbt_fifo_get_first_item(mc_stack_liveness_stateless));
xbt_swag_foreach(process, simix_global->process_list){
if(MC_process_is_enabled(process)){
MC_state_interleave_process(current_pair->graph_state, process);
}
}
- XBT_DEBUG("************************************************** ( search_cycle = %d )", 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));
-
+ /* Get current pair */
+ current_pair = (mc_pair_stateless_t)xbt_fifo_get_item_content(xbt_fifo_get_first_item(mc_stack_liveness_stateless));
+ /* Update current state in buchi automaton */
+ a->current_state = current_pair->automaton_state;
+
+
+ XBT_DEBUG("********************* ( Depth = %d, search_cycle = %d )", xbt_fifo_size(mc_stack_liveness_stateless), 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++;
int value;
smx_req_t req = NULL;
char *req_str;
- mc_pair_t pair_succ;
xbt_transition_t transition_succ;
- unsigned int cursor;
+ unsigned int cursor = 0;
int res;
- xbt_dynar_t successors = xbt_dynar_new(sizeof(mc_pair_t), NULL);
-
- mc_pair_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){
-
- MC_SET_RAW_MEM;
- current_snapshot = xbt_new0(s_mc_snapshot_t, 1);
- MC_take_snapshot(current_snapshot);
- MC_UNSET_RAW_MEM;
-
-
- /* Debug information */
- if(XBT_LOG_ISENABLED(mc_liveness, 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);
-
- /* 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_pair_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(successors);
-
- cursor = 0;
- xbt_dynar_foreach(current_pair->automaton_state->out, cursor, transition_succ){
-
- res = MC_automaton_evaluate_label(a, transition_succ->label);
+ mc_pair_stateless_t next_pair = NULL;
+ mc_pair_stateless_t pair_succ;
- MC_SET_RAW_MEM;
-
- if((res == 1) || (res == 2)){ // enabled transition in automaton
- next_pair = new_pair(next_snapshot,next_graph_state, transition_succ->dst);
- xbt_dynar_push(successors, &next_pair);
- }
+ if(xbt_fifo_size(mc_stack_liveness_stateless) < MAX_DEPTH_LIVENESS){
- MC_UNSET_RAW_MEM;
- }
+ if(current_pair->requests > 0){
+ while((req = MC_state_get_request(current_pair->graph_state, &value)) != NULL){
- if(xbt_dynar_length(successors) == 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;
-
- }
-
+ /* Debug information */
+ if(XBT_LOG_ISENABLED(mc_liveness, xbt_log_priority_debug)){
+ req_str = MC_request_to_string(req, value);
+ XBT_DEBUG("Execute: %s", req_str);
+ xbt_free(req_str);
+ }
- cursor = 0;
- xbt_dynar_foreach(successors, cursor, pair_succ){
+ MC_state_set_executed_request(current_pair->graph_state, req, value);
+
+ /* Answer the request */
+ SIMIX_request_pre(req, value);
- //XBT_DEBUG("Search visited pair : graph=%p, automaton=%p", pair_succ->graph_state, pair_succ->automaton_state);
+ /* Wait for requests (schedules processes) */
+ MC_wait_for_requests();
- if((search_cycle == 1) && (reached(pair_succ) == 1)){
- XBT_INFO("*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*");
- XBT_INFO("| ACCEPTANCE CYCLE |");
- XBT_INFO("*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*");
- XBT_INFO("Counter-example that violates formula :");
- MC_show_stack_liveness_stateful(mc_stack_liveness_stateful);
- MC_dump_stack_liveness_stateful(mc_stack_liveness_stateful);
- MC_print_statistics_pairs(mc_stats_pair);
- exit(0);
- }
-
- if(visited(pair_succ, search_cycle) == 0){
- mc_stats_pair->executed_transitions++;
-
MC_SET_RAW_MEM;
- xbt_fifo_unshift(mc_stack_liveness_stateful, pair_succ);
- set_pair_visited(pair_succ, search_cycle);
- MC_UNSET_RAW_MEM;
-
- MC_vddfs_stateful(a, search_cycle, 0);
- if((search_cycle == 0) && (current_pair->automaton_state->type == 1)){
+ /* Create the new expanded graph_state */
+ next_graph_state = MC_state_pair_new();
- MC_restore_snapshot(current_pair->system_state);
- MC_UNSET_RAW_MEM;
-
- xbt_swag_foreach(process, simix_global->process_list){
- if(MC_process_is_enabled(process)){
- MC_state_interleave_process(current_pair->graph_state, process);
- }
+ /* 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);
}
-
- set_pair_reached(current_pair);
- XBT_DEBUG("Acceptance pair : graph=%p, automaton=%p(%s)", current_pair->graph_state, current_pair->automaton_state, current_pair->automaton_state->id);
- MC_vddfs_stateful(a, 1, 1);
-
}
- }else{
-
- XBT_DEBUG("Pair already visited !");
- }
- }
-
-
- if(MC_state_interleave_size(current_pair->graph_state) > 0){
- MC_restore_snapshot(current_snapshot);
- MC_UNSET_RAW_MEM;
- }
- }
-
-
- MC_SET_RAW_MEM;
- xbt_fifo_shift(mc_stack_liveness_stateful);
- XBT_DEBUG("Pair (graph=%p, automaton =%p) shifted in snapshot_stack", current_pair->graph_state, current_pair->automaton_state);
- MC_UNSET_RAW_MEM;
-
-}
-
-
-
-/********************* Double-DFS stateful without visited state *******************/
-
-
-void MC_ddfs_stateful_init(xbt_automaton_t a){
-
- XBT_DEBUG("**************************************************");
- XBT_DEBUG("Double-DFS stateful without visited state init");
- XBT_DEBUG("**************************************************");
-
- mc_pair_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;
-
- init_snapshot = xbt_new0(s_mc_snapshot_t, 1);
-
- initial_graph_state = MC_state_pair_new();
- xbt_swag_foreach(process, simix_global->process_list){
- if(MC_process_is_enabled(process)){
- MC_state_interleave_process(initial_graph_state, process);
- }
- }
-
- reached_pairs = xbt_dynar_new(sizeof(char *), NULL);
+ xbt_dynar_reset(successors);
- 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 */
+ MC_UNSET_RAW_MEM;
- unsigned int cursor = 0;
- unsigned int cursor2 = 0;
- xbt_state_t state = NULL;
- int res;
- xbt_transition_t transition_succ;
- xbt_dynar_t successors = xbt_dynar_new(sizeof(mc_pair_t), NULL);
- mc_pair_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) || (res == 2)){
-
- MC_SET_RAW_MEM;
+ cursor= 0;
+ xbt_dynar_foreach(current_pair->automaton_state->out, cursor, transition_succ){
- mc_initial_pair = new_pair(init_snapshot, initial_graph_state, transition_succ->dst);
- xbt_dynar_push(successors, &mc_initial_pair);
+ res = MC_automaton_evaluate_label(a, transition_succ->label);
- MC_UNSET_RAW_MEM;
+ if(res == 1){ // enabled transition in automaton
+ MC_SET_RAW_MEM;
+ next_pair = new_pair_stateless(next_graph_state, transition_succ->dst, MC_state_interleave_size(next_graph_state));
+ xbt_dynar_push(successors, &next_pair);
+ MC_UNSET_RAW_MEM;
+ }
}
- }
- }
- }
-
- cursor = 0;
-
- if(xbt_dynar_length(successors) == 0){
- xbt_dynar_foreach(a->states, cursor, state){
- if(state->type == -1){
- MC_SET_RAW_MEM;
- mc_initial_pair = new_pair(init_snapshot, initial_graph_state, transition_succ->dst);
- xbt_dynar_push(successors, &mc_initial_pair);
+ cursor = 0;
+
+ xbt_dynar_foreach(current_pair->automaton_state->out, cursor, transition_succ){
+
+ res = MC_automaton_evaluate_label(a, transition_succ->label);
- MC_UNSET_RAW_MEM;
- }
- }
- }
-
- cursor = 0;
- xbt_dynar_foreach(successors, cursor, pair_succ){
- MC_SET_RAW_MEM;
-
- xbt_fifo_unshift(mc_stack_liveness_stateful, pair_succ);
-
- MC_UNSET_RAW_MEM;
-
- if(cursor == 0){
- MC_ddfs_stateful(a, 0, 0);
- }else{
- MC_ddfs_stateful(a, 0, 1);
- }
- }
-}
+ if(res == 2){ // true transition in automaton
+ MC_SET_RAW_MEM;
+ next_pair = new_pair_stateless(next_graph_state, transition_succ->dst, MC_state_interleave_size(next_graph_state));
+ xbt_dynar_push(successors, &next_pair);
+ MC_UNSET_RAW_MEM;
+ }
+ }
-void MC_ddfs_stateful(xbt_automaton_t a, int search_cycle, int restore){
+
+ if(xbt_dynar_length(successors) == 0){
+ MC_SET_RAW_MEM;
+ next_pair = new_pair_stateless(next_graph_state, current_pair->automaton_state, MC_state_interleave_size(next_graph_state));
+ xbt_dynar_push(successors, &next_pair);
+ MC_UNSET_RAW_MEM;
+ }
- smx_process_t process = NULL;
+ cursor = 0;
+ xbt_dynar_foreach(successors, cursor, pair_succ){
- if(xbt_fifo_size(mc_stack_liveness_stateful) == 0)
- return;
+ if(search_cycle == 1){
- if(restore == 1){
- MC_restore_snapshot(((mc_pair_t)xbt_fifo_get_item_content(xbt_fifo_get_first_item(mc_stack_liveness_stateful)))->system_state);
- MC_UNSET_RAW_MEM;
- }
+ if((pair_succ->automaton_state->type == 1) || (pair_succ->automaton_state->type == 2)){
+
+ MC_SET_RAW_MEM;
+ snapshot = xbt_new0(s_mc_snapshot_t, 1);
+ MC_take_snapshot_liveness(snapshot, prgm);
+ MC_UNSET_RAW_MEM;
+ if(reached(a, pair_succ->automaton_state, snapshot) == 1){
- /* Get current state */
- mc_pair_t current_pair = (mc_pair_t)xbt_fifo_get_item_content(xbt_fifo_get_first_item(mc_stack_liveness_stateful));
+ 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(restore==1){
- xbt_swag_foreach(process, simix_global->process_list){
- if(MC_process_is_enabled(process)){
- MC_state_interleave_process(current_pair->graph_state, process);
- }
- }
- }
+ 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_DEBUG("************************************************** ( search_cycle = %d )", 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));
-
+ }else{
- mc_stats_pair->visited_pairs++;
+ 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(a, pair_succ->automaton_state, snapshot);
- int value;
- mc_state_t next_graph_state = NULL;
- smx_req_t req = NULL;
- char *req_str;
+ }
- mc_pair_t pair_succ;
- xbt_transition_t transition_succ;
- unsigned int cursor;
- int res;
+ }
- xbt_dynar_t successors = xbt_dynar_new(sizeof(mc_pair_t), NULL);
+ }else{
+
+ if(((pair_succ->automaton_state->type == 1) || (pair_succ->automaton_state->type == 2))){
- mc_pair_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("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);
- MC_SET_RAW_MEM;
- current_snapshot = xbt_new0(s_mc_snapshot_t, 1);
- MC_take_snapshot(current_snapshot);
- MC_UNSET_RAW_MEM;
-
-
- /* Debug information */
- if(XBT_LOG_ISENABLED(mc_liveness, xbt_log_priority_debug)){
- req_str = MC_request_to_string(req, value);
- XBT_DEBUG("Execute: %s", req_str);
- xbt_free(req_str);
- }
+ MC_SET_RAW_MEM;
+ snapshot = xbt_new0(s_mc_snapshot_t, 1);
+ MC_take_snapshot_liveness(snapshot, prgm);
+ MC_UNSET_RAW_MEM;
+
+ set_pair_reached(a, pair_succ->automaton_state, snapshot);
+
+ search_cycle = 1;
- MC_state_set_executed_request(current_pair->graph_state, req, value);
+ }
- /* Answer the request */
- SIMIX_request_pre(req, value);
+ }
- /* Wait for requests (schedules processes) */
- MC_wait_for_requests();
+ MC_SET_RAW_MEM;
+ xbt_fifo_unshift(mc_stack_liveness_stateless, pair_succ);
+ MC_UNSET_RAW_MEM;
+ MC_ddfs_stateless(a, search_cycle, 0, prgm);
- /* Create the new expanded graph_state */
- MC_SET_RAW_MEM;
+ /* Restore system before checking others successors */
+ if(cursor != (xbt_dynar_length(successors) - 1))
+ MC_replay_liveness(mc_stack_liveness_stateless, 1);
+
+ }
- next_graph_state = MC_state_pair_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);
+ 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);
+ }
}
- }
-
- next_snapshot = xbt_new0(s_mc_snapshot_t, 1);
- MC_take_snapshot(next_snapshot);
-
- MC_UNSET_RAW_MEM;
-
- 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);
+
+ }else{ /*No request to execute, search evolution in Büchi automaton */
MC_SET_RAW_MEM;
-
- if((res == 1) || (res == 2)){ // enabled transition in automaton
- next_pair = new_pair(next_snapshot,next_graph_state, transition_succ->dst);
- xbt_dynar_push(successors, &next_pair);
- }
- MC_UNSET_RAW_MEM;
- }
+ /* Create the new expanded graph_state */
+ next_graph_state = MC_state_pair_new();
-
- if(xbt_dynar_length(successors) == 0){
+ xbt_dynar_reset(successors);
- 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;
-
- }
-
-
- 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((search_cycle == 1) && (reached(pair_succ) == 1)){
- XBT_INFO("*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*");
- XBT_INFO("| ACCEPTANCE CYCLE |");
- XBT_INFO("*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*");
- XBT_INFO("Counter-example that violates formula :");
- MC_show_stack_liveness_stateful(mc_stack_liveness_stateful);
- MC_dump_stack_liveness_stateful(mc_stack_liveness_stateful);
- MC_print_statistics_pairs(mc_stats_pair);
- exit(0);
- }
-
- mc_stats_pair->executed_transitions++;
-
- MC_SET_RAW_MEM;
- xbt_fifo_unshift(mc_stack_liveness_stateful, pair_succ);
- MC_UNSET_RAW_MEM;
- MC_ddfs_stateful(a, search_cycle, 0);
+ cursor= 0;
+ xbt_dynar_foreach(current_pair->automaton_state->out, cursor, transition_succ){
- if((search_cycle == 0) && (current_pair->automaton_state->type == 1)){
+ res = MC_automaton_evaluate_label(a, transition_succ->label);
- MC_restore_snapshot(current_pair->system_state);
- MC_UNSET_RAW_MEM;
-
- xbt_swag_foreach(process, simix_global->process_list){
- if(MC_process_is_enabled(process)){
- MC_state_interleave_process(current_pair->graph_state, process);
- }
+ if(res == 1){ // enabled transition in automaton
+ MC_SET_RAW_MEM;
+ next_pair = new_pair_stateless(next_graph_state, transition_succ->dst, MC_state_interleave_size(next_graph_state));
+ xbt_dynar_push(successors, &next_pair);
+ MC_UNSET_RAW_MEM;
}
-
- set_pair_reached(current_pair);
- XBT_DEBUG("Acceptance pair : graph=%p, automaton=%p(%s)", current_pair->graph_state, current_pair->automaton_state, current_pair->automaton_state->id);
- MC_ddfs_stateful(a, 1, 1);
}
- }
-
-
- if(MC_state_interleave_size(current_pair->graph_state) > 0){
- MC_restore_snapshot(current_snapshot);
- MC_UNSET_RAW_MEM;
- }
- }
-
-
- MC_SET_RAW_MEM;
- xbt_fifo_shift(mc_stack_liveness_stateful);
- XBT_DEBUG("Pair (graph=%p, automaton =%p) shifted in snapshot_stack", current_pair->graph_state, current_pair->automaton_state);
- MC_UNSET_RAW_MEM;
-
-}
-
-
-
-/********************* Double-DFS stateless *******************/
-
-void MC_pair_stateless_delete(mc_pair_stateless_t pair){
- xbt_free(pair->graph_state->proc_status);
- xbt_free(pair->graph_state);
- //xbt_free(pair->automaton_state); -> FIXME : à implémenter
- xbt_free(pair);
-}
-
-mc_pair_stateless_t new_pair_stateless(mc_state_t sg, xbt_state_t st){
- mc_pair_stateless_t p = NULL;
- p = xbt_new0(s_mc_pair_stateless_t, 1);
- p->automaton_state = st;
- p->graph_state = sg;
- mc_stats_pair->expanded_pairs++;
- return p;
-}
-
-
-int reached_stateless(mc_reached_pair_stateless_t pair){
-
- char* hash_reached = malloc(sizeof(char)*160);
- unsigned int c= 0;
-
- MC_SET_RAW_MEM;
- char *hash = malloc(sizeof(char)*160);
- xbt_sha((char *)&pair, hash);
- xbt_dynar_foreach(reached_pairs, c, hash_reached){
- if(strcmp(hash, hash_reached) == 0){
- MC_UNSET_RAW_MEM;
- return 1;
- }
- }
-
- MC_UNSET_RAW_MEM;
- return 0;
-}
-
-void set_pair_stateless_reached(mc_pair_stateless_t pair){
-
- mc_reached_pair_stateless_t p = NULL;
- p = xbt_new0(s_mc_reached_pair_stateless_t, 1);
- p->pair = pair;
- p->snapshot_system = xbt_new0(s_mc_snapshot_t, 1);
- MC_take_snapshot(p->snapshot_system);
-
- if(reached_stateless(p) == 0){
- MC_SET_RAW_MEM;
- char *hash = malloc(sizeof(char)*160) ;
- xbt_sha((char *)&p, hash);
- xbt_dynar_push(reached_pairs, &hash);
- MC_UNSET_RAW_MEM;
- }
-
-}
-
-void MC_ddfs_stateless_init(xbt_automaton_t a){
-
- XBT_DEBUG("**************************************************");
- XBT_DEBUG("Double-DFS stateless init");
- XBT_DEBUG("**************************************************");
-
- mc_pair_stateless_t mc_initial_pair;
- mc_state_t initial_graph_state;
- smx_process_t process;
-
- MC_wait_for_requests();
-
- MC_SET_RAW_MEM;
-
- initial_graph_state = MC_state_pair_new();
- xbt_swag_foreach(process, simix_global->process_list){
- if(MC_process_is_enabled(process)){
- MC_state_interleave_process(initial_graph_state, process);
- }
- }
-
- reached_pairs = xbt_dynar_new(sizeof(char *), NULL);
-
- 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 */
-
- unsigned int cursor = 0;
- unsigned int cursor2 = 0;
- xbt_state_t state = NULL;
- int res;
- xbt_transition_t transition_succ;
- xbt_dynar_t successors = xbt_dynar_new(sizeof(mc_pair_stateless_t), NULL);
- mc_pair_stateless_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);
+ cursor = 0;
+
+ xbt_dynar_foreach(current_pair->automaton_state->out, cursor, transition_succ){
+
+ res = MC_automaton_evaluate_label(a, transition_succ->label);
- if((res == 1) || (res == 2)){
-
- MC_SET_RAW_MEM;
-
- mc_initial_pair = new_pair_stateless(initial_graph_state, transition_succ->dst);
- xbt_dynar_push(successors, &mc_initial_pair);
-
- MC_UNSET_RAW_MEM;
-
+ if(res == 2){ // true transition in automaton
+ MC_SET_RAW_MEM;
+ next_pair = new_pair_stateless(next_graph_state, transition_succ->dst, MC_state_interleave_size(next_graph_state));
+ xbt_dynar_push(successors, &next_pair);
+ MC_UNSET_RAW_MEM;
}
- }
- }
- }
- cursor = 0;
+ }
- if(xbt_dynar_length(successors) == 0){
- xbt_dynar_foreach(a->states, cursor, state){
- if(state->type == -1){
+
+ if(xbt_dynar_length(successors) == 0){
MC_SET_RAW_MEM;
-
- mc_initial_pair = new_pair_stateless(initial_graph_state, transition_succ->dst);
- xbt_dynar_push(successors, &mc_initial_pair);
-
+ next_pair = new_pair_stateless(next_graph_state, current_pair->automaton_state, MC_state_interleave_size(next_graph_state));
+ xbt_dynar_push(successors, &next_pair);
MC_UNSET_RAW_MEM;
}
- }
- }
-
- cursor = 0;
- xbt_dynar_foreach(successors, cursor, pair_succ){
- MC_SET_RAW_MEM;
-
- xbt_fifo_unshift(mc_stack_liveness_stateless, pair_succ);
- /* Save the initial state */
- initial_snapshot = xbt_new0(s_mc_snapshot_t, 1);
- MC_take_snapshot(initial_snapshot);
+ cursor = 0;
- MC_UNSET_RAW_MEM;
-
- if(cursor == 0){
- MC_ddfs_stateless(a, 0, 0);
- }else{
- MC_ddfs_stateless(a, 0, 1);
- }
- }
-}
-
-
-void MC_ddfs_stateless(xbt_automaton_t a, int search_cycle, int replay){
-
- smx_process_t process = NULL;
+ xbt_dynar_foreach(successors, cursor, pair_succ){
+ if(search_cycle == 1){
- if(xbt_fifo_size(mc_stack_liveness_stateless) == 0)
- return;
-
- /* Get current state */
- mc_pair_stateless_t current_pair = (mc_pair_stateless_t)xbt_fifo_get_item_content(xbt_fifo_get_first_item(mc_stack_liveness_stateless));
-
- XBT_DEBUG("********************* ( Depth = %d, search_cycle = %d )", xbt_fifo_size(mc_stack_liveness_stateless), 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++;
+ if((pair_succ->automaton_state->type == 1) || (pair_succ->automaton_state->type == 2)){
- int value;
- mc_state_t next_graph_state = NULL;
- smx_req_t req = NULL;
- char *req_str;
-
- mc_pair_stateless_t pair_succ;
- xbt_transition_t transition_succ;
- unsigned int cursor;
- int res;
-
- xbt_dynar_t successors;
+ MC_SET_RAW_MEM;
+ snapshot = xbt_new0(s_mc_snapshot_t, 1);
+ MC_take_snapshot_liveness(snapshot, prgm);
+ MC_UNSET_RAW_MEM;
+
+ if(reached(a, pair_succ->automaton_state, snapshot) == 1){
- mc_pair_stateless_t next_pair;
- mc_snapshot_t snap;
-
- while((req = MC_state_get_request(current_pair->graph_state, &value)) != NULL){
+ XBT_DEBUG("Next pair (depth = %d) already reached !", xbt_fifo_size(mc_stack_liveness_stateless) + 1);
- //XBT_DEBUG("Interleave size %u", MC_state_interleave_size(current_pair->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);
- /* Debug information */
- if(XBT_LOG_ISENABLED(mc_liveness, xbt_log_priority_debug)){
- req_str = MC_request_to_string(req, value);
- XBT_DEBUG("Execute: %s", req_str);
- xbt_free(req_str);
- }
+ }else{
- //sleep(1);
+ 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(a, pair_succ->automaton_state, snapshot);
- MC_state_set_executed_request(current_pair->graph_state, req, value);
-
- /* Answer the request */
- SIMIX_request_pre(req, value);
+ }
- /* Wait for requests (schedules processes) */
- MC_wait_for_requests();
+ }
+ }else{
+
+ if(((pair_succ->automaton_state->type == 1) || (pair_succ->automaton_state->type == 2)) && (xbt_fifo_size(mc_stack_liveness_stateless) < (MAX_DEPTH_LIVENESS - 1))){
- /* Create the new expanded graph_state */
- MC_SET_RAW_MEM;
+ MC_SET_RAW_MEM;
+ snapshot = xbt_new0(s_mc_snapshot_t, 1);
+ MC_take_snapshot_liveness(snapshot, prgm);
+ MC_UNSET_RAW_MEM;
+
+ set_pair_reached(a, pair_succ->automaton_state, snapshot);
+
+ search_cycle = 1;
- next_graph_state = MC_state_pair_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);
- }
- }
+ }
- successors = xbt_dynar_new(sizeof(mc_pair_stateless_t), NULL);
+ }
- snap = xbt_new0(s_mc_snapshot_t, 1);
- MC_take_snapshot(snap);
+ MC_SET_RAW_MEM;
+ xbt_fifo_unshift(mc_stack_liveness_stateless, pair_succ);
+ MC_UNSET_RAW_MEM;
- MC_UNSET_RAW_MEM;
-
- //xbt_dynar_reset(successors);
-
- cursor = 0;
-
- xbt_dynar_foreach(current_pair->automaton_state->out, cursor, transition_succ){
+ MC_ddfs_stateless(a, search_cycle, 0, prgm);
- res = MC_automaton_evaluate_label(a, transition_succ->label);
+ /* Restore system before checking others successors */
+ if(cursor != xbt_dynar_length(successors) - 1)
+ MC_replay_liveness(mc_stack_liveness_stateless, 1);
- MC_SET_RAW_MEM;
-
- if((res == 1) || (res == 2)){ // enabled transition in automaton
- next_pair = new_pair_stateless(next_graph_state, transition_succ->dst);
- xbt_dynar_push(successors, &next_pair);
}
-
- MC_UNSET_RAW_MEM;
- }
-
-
- if(xbt_dynar_length(successors) == 0){
-
- MC_SET_RAW_MEM;
- next_pair = new_pair_stateless(next_graph_state, current_pair->automaton_state);
- xbt_dynar_push(successors, &next_pair);
- MC_UNSET_RAW_MEM;
-
- }
-
- cursor = 0;
-
- xbt_dynar_foreach(successors, cursor, pair_succ){
-
- mc_reached_pair_stateless_t p = NULL;
- p = xbt_new0(s_mc_reached_pair_stateless_t, 1);
- p->pair = pair_succ;
- p->snapshot_system = snap;
- if((search_cycle == 1) && (reached_stateless(p) == 1)){
- 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);
- }
-
- mc_stats_pair->executed_transitions++;
-
- MC_SET_RAW_MEM;
- xbt_fifo_unshift(mc_stack_liveness_stateless, pair_succ);
- MC_UNSET_RAW_MEM;
-
- MC_ddfs_stateless(a, search_cycle, 0);
-
- if((search_cycle == 0) && (current_pair->automaton_state->type == 1)){
-
- set_pair_stateless_reached(current_pair);
- XBT_DEBUG("Acceptance pair : graph=%p, automaton=%p(%s)", current_pair->graph_state, current_pair->automaton_state, current_pair->automaton_state->id);
- MC_replay_liveness(mc_stack_liveness_stateless);
- MC_ddfs_stateless(a, 1, 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);
}
}
+ if(xbt_fifo_size(mc_stack_liveness_stateless) == MAX_DEPTH_LIVENESS ){
+ XBT_DEBUG("Pair (graph=%p, automaton =%p, search_cycle = %u) shifted in stack, maximum depth reached", current_pair->graph_state, current_pair->automaton_state, search_cycle);
+ }else{
+ XBT_DEBUG("Pair (graph=%p, automaton =%p, search_cycle = %u) shifted in stack", current_pair->graph_state, current_pair->automaton_state, search_cycle);
+ }
+
MC_SET_RAW_MEM;
xbt_fifo_shift(mc_stack_liveness_stateless);
- XBT_DEBUG("Pair (graph=%p, automaton =%p) shifted in stack", current_pair->graph_state, current_pair->automaton_state);
+ if((current_pair->automaton_state->type == 1) || (current_pair->automaton_state->type == 2)){
+ xbt_fifo_shift(reached_pairs);
+ }
+ if(snapshot != NULL)
+ MC_free_snapshot(snapshot);
MC_UNSET_RAW_MEM;
+ MC_pair_stateless_delete(current_pair);
+
+ /* FIXME : free memory (pair, snapshot)*/
+
}
