-#include "private.h"
-#include "unistd.h"
+/* Copyright (c) 2011-2014. The SimGrid Team.
+ * All rights reserved. */
-XBT_LOG_NEW_DEFAULT_SUBCATEGORY(mc_liveness, mc,
- "Logging specific to algorithms for liveness properties verification");
+/* This program is free software; you can redistribute it and/or modify it
+ * under the terms of the license (GNU LGPL) which comes with this package. */
-xbt_dynar_t initial_pairs = NULL;
-int max_pair = 0;
-xbt_dynar_t visited_pairs;
-xbt_dynar_t reached_pairs;
-int expanded = 0;
-
-mc_pairs_t new_pair(mc_snapshot_t sn, mc_state_t sg, xbt_state_t st){
- mc_pairs_t p = NULL;
- p = xbt_new0(s_mc_pairs_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;
-
-}
+#include <unistd.h>
+#include <sys/wait.h>
-void set_pair_visited(mc_state_t gs, xbt_state_t as, int sc){
+#include <xbt/dynar.h>
+#include <xbt/automaton.h>
- 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;
- char *hash = malloc(sizeof(char)*128);
- xbt_sha((char *)&p, hash);
- xbt_dynar_push(visited_pairs, &hash);
- MC_UNSET_RAW_MEM;
+#include "mc_request.h"
+#include "mc_liveness.h"
+#include "mc_private.h"
+#include "mc_record.h"
-}
+XBT_LOG_NEW_DEFAULT_SUBCATEGORY(mc_liveness, mc,
+ "Logging specific to algorithms for liveness properties verification");
-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;
- XBT_DEBUG("Pair (graph=%p, automaton=%p(%s)) already reached (graph=%p)!", gs, as, as->id, rp->graph_state);
- return 1;
- }
- }
- }
- MC_UNSET_RAW_MEM;
- return 0;*/
- //XBT_DEBUG("Search acceptance pair already reach !");
-
- char* hash_reached = malloc(sizeof(char)*128);
- unsigned int c= 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;
- char *hash = malloc(sizeof(char)*128);
- xbt_sha((char *)&p, hash);
- //XBT_DEBUG("Hash : %s", hash);
- xbt_dynar_foreach(reached_pairs, c, hash_reached){
- if(strcmp(hash, hash_reached) == 0){
- MC_UNSET_RAW_MEM;
- //XBT_DEBUG("Pair (graph=%p, automaton=%p(%s)) already reached !", gs, as, as->id);
- return 1;
- }
- }
-
- MC_UNSET_RAW_MEM;
- return 0;
-}
+/********* Global variables *********/
-void set_pair_reached(mc_state_t gs, xbt_state_t as){
-
- //XBT_DEBUG("Set pair (graph=%p, automaton=%p) reached ", gs, as);
- 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;
- char *hash = malloc(sizeof(char)*128) ;
- xbt_sha((char *)&p, hash);
- xbt_dynar_push(reached_pairs, &hash);
- //XBT_DEBUG("New reached pair : graph=%p, automaton=%p(%s)", gs, as, as->id);
- MC_UNSET_RAW_MEM;
- }
+xbt_dynar_t acceptance_pairs;
+xbt_dynar_t successors;
+xbt_parmap_t parmap;
-}
+/********* Static functions *********/
-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;
-
- //XBT_DEBUG("Visited pair length : %lu", xbt_dynar_length(visited_pairs));
-
- MC_SET_RAW_MEM;
- xbt_dynar_foreach(visited_pairs, c, p){
- //XBT_DEBUG("Test pair visited");
- //sleep(1);
- 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;*/
-
- //XBT_DEBUG("Test visited pair");
-
- char* hash_visited = malloc(sizeof(char)*128);
- unsigned int c= 0;
-
- 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;
- char *hash = malloc(sizeof(char)*128);
- xbt_sha((char *)&p, hash);
- //XBT_DEBUG("Hash : %s", hash);
- xbt_dynar_foreach(visited_pairs, c, hash_visited){
- if(strcmp(hash, hash_visited) == 0){
- MC_UNSET_RAW_MEM;
- return 1;
- }
+static xbt_dynar_t get_atomic_propositions_values()
+{
+ int res;
+ int_f_void_t f;
+ unsigned int cursor = 0;
+ xbt_automaton_propositional_symbol_t ps = NULL;
+ xbt_dynar_t values = xbt_dynar_new(sizeof(int), NULL);
+
+ xbt_dynar_foreach(_mc_property_automaton->propositional_symbols, cursor, ps) {
+ f = (int_f_void_t) ps->function;
+ res = f();
+ xbt_dynar_push_as(values, int, res);
}
-
- MC_UNSET_RAW_MEM;
- //XBT_DEBUG("End test visited pair");
- return 0;
+ return values;
}
-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;
-
- 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);
- }
- }
-
- visited_pairs = xbt_dynar_new(sizeof(char *), NULL);
- reached_pairs = xbt_dynar_new(sizeof(char *), NULL);
- MC_take_snapshot(init_snapshot);
+static mc_visited_pair_t is_reached_acceptance_pair(int pair_num,
+ xbt_automaton_state_t
+ automaton_state,
+ xbt_dynar_t
+ atomic_propositions)
+{
- MC_UNSET_RAW_MEM;
+ int raw_mem_set = (mmalloc_get_current_heap() == mc_heap);
- /* unsigned int cursor = 0; */
- /* xbt_state_t state = NULL; */
- /* int nb_init_state = 0; */
+ MC_SET_MC_HEAP;
- /* xbt_dynar_foreach(a->states, cursor, state){ */
- /* if(state->type == -1){ */
+ mc_visited_pair_t pair = NULL;
+ pair = MC_visited_pair_new(pair_num, automaton_state, atomic_propositions);
+ pair->acceptance_pair = 1;
- /* MC_SET_RAW_MEM; */
- /* mc_initial_pair = new_pair(init_snapshot, initial_graph_state, state); */
+ if (xbt_dynar_is_empty(acceptance_pairs)) {
- /* xbt_fifo_unshift(mc_snapshot_stack, mc_initial_pair); */
+ xbt_dynar_push(acceptance_pairs, &pair);
- /* XBT_DEBUG("**************************************************"); */
- /* XBT_DEBUG("Initial state=%p ", mc_initial_pair); */
+ } else {
- /* MC_UNSET_RAW_MEM; */
+ int min = -1, max = -1, index;
+ //int res;
+ mc_visited_pair_t pair_test;
+ int cursor;
- /* set_pair_visited(mc_initial_pair->graph_state, mc_initial_pair->automaton_state, 0); */
-
- /* if(nb_init_state == 0) */
- /* MC_dfs(a, 0, 0); */
- /* else */
- /* MC_dfs(a, 0, 1); */
-
- /* nb_init_state++; */
- /* } */
- /* } */
+ index = get_search_interval(acceptance_pairs, pair, &min, &max);
- /* 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 */
+ if (min != -1 && max != -1) { // Acceptance pair with same number of processes and same heap bytes used exists
- 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_pairs_t), NULL);
- mc_pairs_t pair_succ;
+ // Parallell implementation
+ /*res = xbt_parmap_mc_apply(parmap, snapshot_compare, xbt_dynar_get_ptr(acceptance_pairs, min), (max-min)+1, pair);
+ if(res != -1){
+ if(!raw_mem_set)
+ MC_SET_STD_HEAP;
+ return ((mc_pair_t)xbt_dynar_get_as(acceptance_pairs, (min+res)-1, mc_pair_t))->num;
+ } */
- 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 = min;
+ while (cursor <= max) {
+ pair_test =
+ (mc_visited_pair_t) xbt_dynar_get_as(acceptance_pairs, cursor,
+ mc_visited_pair_t);
+ if (xbt_automaton_state_compare
+ (pair_test->automaton_state, pair->automaton_state) == 0) {
+ if (xbt_automaton_propositional_symbols_compare_value
+ (pair_test->atomic_propositions,
+ pair->atomic_propositions) == 0) {
+ if (snapshot_compare(pair_test, pair) == 0) {
+ XBT_INFO("Pair %d already reached (equal to pair %d) !",
+ pair->num, pair_test->num);
- mc_initial_pair = new_pair(init_snapshot, initial_graph_state, transition_succ->dst);
- xbt_dynar_push(successors, &mc_initial_pair);
+ xbt_fifo_shift(mc_stack);
+ if (dot_output != NULL)
+ fprintf(dot_output, "\"%d\" -> \"%d\" [%s];\n",
+ initial_global_state->prev_pair, pair_test->num,
+ initial_global_state->prev_req);
- MC_UNSET_RAW_MEM;
+ if (!raw_mem_set)
+ MC_SET_STD_HEAP;
- }
+ return NULL;
+ }
+ }
+ }
+ cursor++;
}
- }
- }
-
- 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);
-
- MC_UNSET_RAW_MEM;
+ xbt_dynar_insert_at(acceptance_pairs, min, &pair);
+ } else {
+ pair_test =
+ (mc_visited_pair_t) xbt_dynar_get_as(acceptance_pairs, index,
+ mc_visited_pair_t);
+ if (pair_test->nb_processes < pair->nb_processes) {
+ xbt_dynar_insert_at(acceptance_pairs, index + 1, &pair);
+ } else {
+ if (pair_test->heap_bytes_used < pair->heap_bytes_used)
+ xbt_dynar_insert_at(acceptance_pairs, index + 1, &pair);
+ else
+ xbt_dynar_insert_at(acceptance_pairs, index, &pair);
}
}
- }
-
- cursor = 0;
- xbt_dynar_foreach(successors, cursor, pair_succ){
- MC_SET_RAW_MEM;
-
- xbt_fifo_unshift(mc_snapshot_stack, pair_succ);
- set_pair_visited(pair_succ->graph_state, pair_succ->automaton_state, 0);
- MC_UNSET_RAW_MEM;
-
- if(cursor == 0){
- MC_dfs(a, 0, 0);
- }else{
- MC_dfs(a, 0, 1);
- }
}
-
+ if (!raw_mem_set)
+ MC_SET_STD_HEAP;
-
-
-}
+ return pair;
+}
-void MC_dfs(xbt_automaton_t a, int search_cycle, int restore){
+static void remove_acceptance_pair(int pair_num)
+{
- smx_process_t process = NULL;
+ int raw_mem_set = (mmalloc_get_current_heap() == mc_heap);
+ MC_SET_MC_HEAP;
- if(xbt_fifo_size(mc_snapshot_stack) == 0)
- return;
+ unsigned int cursor = 0;
+ mc_visited_pair_t pair_test = NULL;
- 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_dynar_foreach(acceptance_pairs, cursor, pair_test) {
+ if (pair_test->num == pair_num) {
+ break;
+ }
}
+ xbt_dynar_remove_at(acceptance_pairs, cursor, &pair_test);
- /* Get current state */
- mc_pairs_t current_pair = (mc_pairs_t)xbt_fifo_get_item_content(xbt_fifo_get_first_item(mc_snapshot_stack));
+ pair_test->acceptance_removed = 1;
- /*if(restore==1){
- xbt_swag_foreach(process, simix_global->process_list){
- if(MC_process_is_enabled(process)){
- //XBT_DEBUG("Pid : %lu", process->pid);
- MC_state_interleave_process(current_pair->graph_state, process);
- }
- }
- }*/
+ if (_sg_mc_visited == 0) {
+ MC_visited_pair_delete(pair_test);
+ } else if (pair_test->visited_removed == 1) {
+ MC_visited_pair_delete(pair_test);
+ }
- XBT_DEBUG("************************************************** ( search_cycle = %d )", search_cycle);
- XBT_DEBUG("State : 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));
-
+ if (!raw_mem_set)
+ MC_SET_STD_HEAP;
+}
- mc_stats_pair->visited_pairs++;
- int value;
- mc_state_t next_graph_state = NULL;
- smx_req_t req = NULL;
- char *req_str;
+static int MC_automaton_evaluate_label(xbt_automaton_exp_label_t l,
+ xbt_dynar_t atomic_propositions_values)
+{
- mc_pairs_t pair_succ;
- xbt_transition_t transition_succ;
- unsigned int cursor;
- int res;
- //int enabled_transition = 0;
-
- 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){
-
- 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);
+ switch (l->type) {
+ case 0:{
+ int left_res =
+ MC_automaton_evaluate_label(l->u.or_and.left_exp,
+ atomic_propositions_values);
+ int right_res =
+ MC_automaton_evaluate_label(l->u.or_and.right_exp,
+ atomic_propositions_values);
+ return (left_res || right_res);
}
-
- 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);
+ case 1:{
+ int left_res =
+ MC_automaton_evaluate_label(l->u.or_and.left_exp,
+ atomic_propositions_values);
+ int right_res =
+ MC_automaton_evaluate_label(l->u.or_and.right_exp,
+ atomic_propositions_values);
+ return (left_res && right_res);
+ }
+ case 2:{
+ int res =
+ MC_automaton_evaluate_label(l->u.exp_not, atomic_propositions_values);
+ return (!res);
+ }
+ case 3:{
+ unsigned int cursor = 0;
+ xbt_automaton_propositional_symbol_t p = NULL;
+ xbt_dynar_foreach(_mc_property_automaton->propositional_symbols, cursor,
+ p) {
+ if (strcmp(p->pred, l->u.predicat) == 0)
+ return (int) xbt_dynar_get_as(atomic_propositions_values, cursor,
+ int);
}
+ return -1;
}
+ case 4:{
+ return 2;
+ }
+ default:
+ return -1;
+ }
+}
- 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);
+void MC_pre_modelcheck_liveness(void)
+{
- 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);
- }
+ initial_global_state->raw_mem_set = (mmalloc_get_current_heap() == mc_heap);
- MC_UNSET_RAW_MEM;
- }
+ mc_pair_t initial_pair = NULL;
+ smx_process_t process;
-
- if(xbt_dynar_length(successors) == 0){
+ MC_wait_for_requests();
- 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;
-
- }
+ MC_SET_MC_HEAP;
+ acceptance_pairs = xbt_dynar_new(sizeof(mc_visited_pair_t), NULL);
+ visited_pairs = xbt_dynar_new(sizeof(mc_visited_pair_t), NULL);
+ successors = xbt_dynar_new(sizeof(mc_pair_t), NULL);
- cursor = 0;
- xbt_dynar_foreach(successors, cursor, pair_succ){
+ initial_global_state->snapshot = MC_take_snapshot(0);
+ initial_global_state->prev_pair = 0;
- //XBT_DEBUG("Search visited pair : graph=%p, automaton=%p", pair_succ->graph_state, pair_succ->automaton_state);
+ MC_SET_STD_HEAP;
- if((search_cycle == 1) && (reached(pair_succ->graph_state, pair_succ->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);
- MC_print_statistics_pairs(mc_stats_pair);
- exit(0);
- }
-
- if(visited(pair_succ->graph_state, pair_succ->automaton_state, search_cycle) == 0){
+ unsigned int cursor = 0;
+ xbt_automaton_state_t automaton_state;
- //XBT_DEBUG("Unvisited pair !");
+ xbt_dynar_foreach(_mc_property_automaton->states, cursor, automaton_state) {
+ if (automaton_state->type == -1) { /* Initial automaton state */
- mc_stats_pair->executed_transitions++;
-
- MC_SET_RAW_MEM;
- xbt_fifo_unshift(mc_snapshot_stack, pair_succ);
- set_pair_visited(pair_succ->graph_state, pair_succ->automaton_state, search_cycle);
- MC_UNSET_RAW_MEM;
+ MC_SET_MC_HEAP;
- MC_dfs(a, search_cycle, 0);
+ initial_pair = MC_pair_new();
+ initial_pair->automaton_state = automaton_state;
+ initial_pair->graph_state = MC_state_new();
+ initial_pair->atomic_propositions = get_atomic_propositions_values();
- if((search_cycle == 0) && (current_pair->automaton_state->type == 1)){
+ /* Get enabled processes and insert them in the interleave set of the graph_state */
+ xbt_swag_foreach(process, simix_global->process_list) {
+ if (MC_process_is_enabled(process)) {
+ MC_state_interleave_process(initial_pair->graph_state, process);
+ }
+ }
- 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)){
- //XBT_DEBUG("Pid : %lu", process->pid);
- MC_state_interleave_process(current_pair->graph_state, process);
- }
- }*/
-
- set_pair_reached(current_pair->graph_state, current_pair->automaton_state);
- XBT_DEBUG("Acceptance pair : graph=%p, automaton=%p(%s)", current_pair->graph_state, current_pair->automaton_state, current_pair->automaton_state->id);
- MC_dfs(a, 1, 1);
+ initial_pair->requests =
+ MC_state_interleave_size(initial_pair->graph_state);
+ initial_pair->search_cycle = 0;
- }
- }else{
+ xbt_fifo_unshift(mc_stack, initial_pair);
+
+ MC_SET_STD_HEAP;
- XBT_DEBUG("Pair already visited !");
+ MC_modelcheck_liveness();
+ if (cursor != 0) {
+ MC_restore_snapshot(initial_global_state->snapshot);
+ MC_SET_STD_HEAP;
}
}
-
-
- if(MC_state_interleave_size(current_pair->graph_state) > 0){
- MC_restore_snapshot(current_snapshot);
- MC_UNSET_RAW_MEM;
- //XBT_DEBUG("Snapshot restored");
- }
}
-
- MC_SET_RAW_MEM;
- //remove_pair_reached(current_pair->graph_state);
- xbt_fifo_shift(mc_snapshot_stack);
- XBT_DEBUG("State (graph=%p, automaton =%p) shifted in snapshot_stack", current_pair->graph_state, current_pair->automaton_state);
- MC_UNSET_RAW_MEM;
+ if (initial_global_state->raw_mem_set)
+ MC_SET_MC_HEAP;
+ else
+ MC_SET_STD_HEAP;
-}
-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){
- mc_pairs_t pair;
- MC_SET_RAW_MEM;
- while ((pair = (mc_pairs_t) xbt_fifo_pop(stack)) != NULL)
- MC_pair_delete(pair);
- MC_UNSET_RAW_MEM;
-}
+void MC_modelcheck_liveness()
+{
-void MC_pair_delete(mc_pairs_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);
-}
+ smx_process_t process;
+ mc_pair_t current_pair = NULL;
+ if (xbt_fifo_size(mc_stack) == 0)
+ return;
-int MC_automaton_evaluate_label(xbt_automaton_t a, xbt_exp_label_t l){
-
- switch(l->type){
- case 0 : {
- int left_res = MC_automaton_evaluate_label(a, l->u.or_and.left_exp);
- int right_res = MC_automaton_evaluate_label(a, l->u.or_and.right_exp);
- return (left_res || right_res);
- break;
- }
- case 1 : {
- int left_res = MC_automaton_evaluate_label(a, l->u.or_and.left_exp);
- int right_res = MC_automaton_evaluate_label(a, l->u.or_and.right_exp);
- return (left_res && right_res);
- break;
- }
- case 2 : {
- int res = MC_automaton_evaluate_label(a, l->u.exp_not);
- return (!res);
- break;
- }
- case 3 : {
- unsigned int cursor = 0;
- xbt_propositional_symbol_t p = NULL;
- xbt_dynar_foreach(a->propositional_symbols, cursor, p){
- if(strcmp(p->pred, l->u.predicat) == 0){
- int (*f)() = p->function;
- return (*f)();
- }
- }
- return -1;
- break;
- }
- case 4 : {
- return 2;
- break;
- }
- default :
- return -1;
- }
-}
+ /* Get current pair */
+ current_pair =
+ (mc_pair_t) xbt_fifo_get_item_content(xbt_fifo_get_first_item(mc_stack));
+ /* Update current state in buchi automaton */
+ _mc_property_automaton->current_state = current_pair->automaton_state;
-/********************* Double DFS using color pair *********************/
+ XBT_DEBUG
+ ("********************* ( Depth = %d, search_cycle = %d, interleave size %d, pair_num %d)",
+ xbt_fifo_size(mc_stack), current_pair->search_cycle,
+ MC_state_interleave_size(current_pair->graph_state), current_pair->num);
+ mc_stats->visited_pairs++;
+ int value;
+ smx_simcall_t req = NULL;
+ xbt_automaton_transition_t transition_succ;
+ unsigned int cursor = 0;
+ int res;
+ int visited_num;
+
+ mc_pair_t next_pair = NULL;
+ xbt_dynar_t prop_values = NULL;
+ mc_visited_pair_t reached_pair = NULL;
+ int counter_example_depth = 0;
+
+ if (xbt_fifo_size(mc_stack) < _sg_mc_max_depth) {
+
+ if (current_pair->requests > 0) {
+
+ if (current_pair->search_cycle) {
+
+ if ((current_pair->automaton_state->type == 1)
+ || (current_pair->automaton_state->type == 2)) {
+ if ((reached_pair =
+ is_reached_acceptance_pair(current_pair->num,
+ current_pair->automaton_state,
+ current_pair->atomic_propositions)) ==
+ NULL) {
+
+ counter_example_depth = xbt_fifo_size(mc_stack);
+ XBT_INFO("*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*");
+ XBT_INFO("| ACCEPTANCE CYCLE |");
+ XBT_INFO("*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*");
+ XBT_INFO("Counter-example that violates formula :");
+ MC_show_stack_liveness(mc_stack);
+ MC_dump_stack_liveness(mc_stack);
+ MC_print_statistics(mc_stats);
+ XBT_INFO("Counter-example depth : %d", counter_example_depth);
+ xbt_abort();
+ }
+ }
+ }
+ if ((visited_num =
+ is_visited_pair(reached_pair, current_pair->num,
+ current_pair->automaton_state,
+ current_pair->atomic_propositions)) != -1) {
+
+ MC_SET_MC_HEAP;
+ if (dot_output != NULL)
+ fprintf(dot_output, "\"%d\" -> \"%d\" [%s];\n",
+ initial_global_state->prev_pair, visited_num,
+ initial_global_state->prev_req);
+ MC_SET_STD_HEAP;
+
+ } else {
+
+ while ((req =
+ MC_state_get_request(current_pair->graph_state,
+ &value)) != NULL) {
+
+ MC_SET_MC_HEAP;
+ if (dot_output != NULL) {
+ if (initial_global_state->prev_pair != 0
+ && initial_global_state->prev_pair != current_pair->num) {
+ fprintf(dot_output, "\"%d\" -> \"%d\" [%s];\n",
+ initial_global_state->prev_pair, current_pair->num,
+ initial_global_state->prev_req);
+ xbt_free(initial_global_state->prev_req);
+ }
+ initial_global_state->prev_pair = current_pair->num;
+ }
+ MC_SET_STD_HEAP;
-/********************* DPOR without replay *********************/
+ MC_LOG_REQUEST(mc_liveness, req, value);
+ MC_SET_MC_HEAP;
+ if (dot_output != NULL) {
+ initial_global_state->prev_req =
+ MC_request_get_dot_output(req, value);
+ if (current_pair->search_cycle)
+ fprintf(dot_output, "%d [shape=doublecircle];\n",
+ current_pair->num);
+ }
+ MC_SET_STD_HEAP;
+ MC_state_set_executed_request(current_pair->graph_state, req, value);
+ mc_stats->executed_transitions++;
-void MC_dpor_with_restore_snapshot_init(xbt_automaton_t a){
+ /* Answer the request */
+ SIMIX_simcall_handle(req, value);
- XBT_DEBUG("**************************************************");
- XBT_DEBUG("DPOR (with restore snapshot) init");
- XBT_DEBUG("**************************************************");
+ /* Wait for requests (schedules processes) */
+ MC_wait_for_requests();
- mc_pairs_t initial_pair;
- mc_state_t initial_graph_state;
- smx_process_t process;
- mc_snapshot_t initial_snapshot;
-
- MC_wait_for_requests();
+ MC_SET_MC_HEAP;
+ prop_values = get_atomic_propositions_values();
+ MC_SET_STD_HEAP;
- MC_SET_RAW_MEM;
+ int new_pair = 0;
- initial_snapshot = xbt_new0(s_mc_snapshot_t, 1);
+ /* Evaluate enabled transition according to atomic propositions values */
+ cursor = 0;
+ xbt_dynar_foreach(current_pair->automaton_state->out, cursor,
+ transition_succ) {
- 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);
- break;
- }
- }
+ res =
+ MC_automaton_evaluate_label(transition_succ->label,
+ prop_values);
- visited_pairs = xbt_dynar_new(sizeof(mc_visited_pairs_t), NULL);
- reached_pairs = xbt_dynar_new(sizeof(mc_reached_pairs_t), NULL);
+ if (res == 1) { // enabled transition in automaton
- MC_take_snapshot(initial_snapshot);
+ if (new_pair)
+ MC_replay_liveness(mc_stack, 1);
- MC_UNSET_RAW_MEM;
+ MC_SET_MC_HEAP;
- unsigned int cursor = 0;
- unsigned int cursor2 = 0;
- xbt_state_t state = NULL;
- int res;
- xbt_transition_t transition_succ;
+ next_pair = MC_pair_new();
+ next_pair->graph_state = MC_state_new();
+ next_pair->automaton_state = transition_succ->dst;
+ next_pair->atomic_propositions = get_atomic_propositions_values();
- 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;
+ /* Get enabled processes and insert them 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_pair->graph_state, process);
+ }
+ }
- initial_pair = new_pair(initial_snapshot, initial_graph_state, transition_succ->dst);
- xbt_fifo_unshift(mc_snapshot_stack, initial_pair);
+ next_pair->requests =
+ MC_state_interleave_size(next_pair->graph_state);
- MC_UNSET_RAW_MEM;
-
- /* Add pair to list of visited pairs*/
- set_pair_visited(initial_pair->graph_state, initial_pair->automaton_state, 0);
+ if (next_pair->automaton_state->type == 1
+ || next_pair->automaton_state->type == 2
+ || current_pair->search_cycle)
+ next_pair->search_cycle = 1;
- MC_dpor_with_restore_snapshot(a, 0, 0);
+ xbt_fifo_unshift(mc_stack, next_pair);
- break;
+ if (mc_stats->expanded_pairs % 1000000 == 0)
+ XBT_INFO("Expanded pairs : %lu", mc_stats->expanded_pairs);
- }
- }
- }
+ MC_SET_STD_HEAP;
- if(xbt_fifo_size(mc_snapshot_stack)>0)
- break;
- }
+ new_pair = 1;
- /* Initial state of automaton is initial state for initial pair*/
- if(xbt_fifo_size(mc_snapshot_stack) == 0){
-
- cursor = 0;
-
- xbt_dynar_foreach(a->states, cursor, state){
- if(state->type == -1){
-
- MC_SET_RAW_MEM;
-
- initial_pair = new_pair(initial_snapshot, initial_graph_state, state);
- xbt_fifo_unshift(mc_snapshot_stack, initial_pair);
-
- MC_UNSET_RAW_MEM;
-
- /* Add pair to list of visited pairs*/
- set_pair_visited(initial_pair->graph_state, initial_pair->automaton_state, 0);
-
- MC_dpor_with_restore_snapshot(a, 0, 0);
-
- break;
- }
- }
+ MC_modelcheck_liveness();
- }
+ }
-}
+ }
+ /* Then, evaluate true transitions (always true, whatever atomic propositions values) */
+ cursor = 0;
+ xbt_dynar_foreach(current_pair->automaton_state->out, cursor,
+ transition_succ) {
-/* Test du dpor sans rejeu des états de la pile à partir de l'état initial du système mais avec restauration au milieu de l'arbre -> s'applique aux safety properties mais pas d'intégration pour les liveness */
-void MC_dpor_with_restore_snapshot(xbt_automaton_t a, int search_cycle, int restore){
+ res =
+ MC_automaton_evaluate_label(transition_succ->label,
+ prop_values);
- smx_process_t process = NULL;
-
- if(xbt_fifo_size(mc_snapshot_stack) == 0)
- return;
+ if (res == 2) { // true transition in automaton
- int value;
- mc_state_t next_graph_state = NULL;
- smx_req_t req = NULL, prev_req = NULL;
- char *req_str;
- xbt_fifo_item_t item = NULL;
+ if (new_pair)
+ MC_replay_liveness(mc_stack, 1);
- xbt_transition_t transition_succ;
- unsigned int cursor;
- int res;
+ MC_SET_MC_HEAP;
- mc_pairs_t next_pair;
- mc_snapshot_t next_snapshot;
- mc_snapshot_t current_snapshot;
- mc_pairs_t current_pair;
- mc_pairs_t prev_pair;
- int new_pair_created;
+ next_pair = MC_pair_new();
+ next_pair->graph_state = MC_state_new();
+ next_pair->automaton_state = transition_succ->dst;
+ next_pair->atomic_propositions = get_atomic_propositions_values();
- while(xbt_fifo_size(mc_snapshot_stack) > 0){
+ /* 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_pair->graph_state, process);
+ }
+ }
- current_pair = (mc_pairs_t)xbt_fifo_get_item_content(xbt_fifo_get_first_item(mc_snapshot_stack));
+ next_pair->requests =
+ MC_state_interleave_size(next_pair->graph_state);
-
- XBT_DEBUG("**************************************************");
- XBT_DEBUG("Depth : %d, State : g=%p, a=%p(%s), %u interleave", xbt_fifo_size(mc_snapshot_stack),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 (next_pair->automaton_state->type == 1
+ || next_pair->automaton_state->type == 2
+ || current_pair->search_cycle)
+ next_pair->search_cycle = 1;
- /* Add pair to list of visited pairs*/
- set_pair_visited(current_pair->graph_state, current_pair->automaton_state, search_cycle);
+ xbt_fifo_unshift(mc_stack, next_pair);
- if((xbt_fifo_size(mc_snapshot_stack) < MAX_DEPTH) && (req = MC_state_get_request(current_pair->graph_state, &value))){
+ if (mc_stats->expanded_pairs % 1000000 == 0)
+ XBT_INFO("Expanded pairs : %lu", mc_stats->expanded_pairs);
- MC_SET_RAW_MEM;
- current_snapshot = xbt_new0(s_mc_snapshot_t, 1);
- MC_take_snapshot(current_snapshot);
- MC_UNSET_RAW_MEM;
+ MC_SET_STD_HEAP;
- /* 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);
- }
+ new_pair = 1;
- MC_state_set_executed_request(current_pair->graph_state, req, value);
+ MC_modelcheck_liveness();
- /* 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 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);
- break;
- }
- }
+ }
- next_snapshot = xbt_new0(s_mc_snapshot_t, 1);
- MC_take_snapshot(next_snapshot);
-
- MC_UNSET_RAW_MEM;
+ }
- new_pair_created = 0;
-
- 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;
- next_pair = new_pair(next_snapshot,next_graph_state, transition_succ->dst);
- xbt_fifo_unshift(mc_snapshot_stack, next_pair);
- MC_UNSET_RAW_MEM;
-
- new_pair_created = 1;
-
- break;
-
- }
- }
+ if (MC_state_interleave_size(current_pair->graph_state) > 0) {
+ XBT_DEBUG("Backtracking to depth %d", xbt_fifo_size(mc_stack));
+ MC_replay_liveness(mc_stack, 0);
+ }
- /* Pas d'avancement possible dans l'automate */
- if(new_pair_created == 0){
-
- MC_SET_RAW_MEM;
- next_pair = new_pair(next_snapshot,next_graph_state,current_pair->automaton_state);
- xbt_fifo_unshift(mc_snapshot_stack, next_pair);
- MC_UNSET_RAW_MEM;
+ }
}
-
- }else{
- XBT_DEBUG("There are no more processes to interleave.");
-
- /* Trash the current state, no longer needed */
- MC_SET_RAW_MEM;
- xbt_fifo_shift(mc_snapshot_stack);
- MC_UNSET_RAW_MEM;
-
- while((current_pair = xbt_fifo_shift(mc_snapshot_stack)) != NULL){
- req = MC_state_get_internal_request(current_pair->graph_state);
- xbt_fifo_foreach(mc_snapshot_stack, item, prev_pair, mc_pairs_t) {
- if(MC_request_depend(req, MC_state_get_internal_request(prev_pair->graph_state))){
- if(XBT_LOG_ISENABLED(mc_liveness, xbt_log_priority_debug)){
- XBT_DEBUG("Dependent Transitions:");
- prev_req = MC_state_get_executed_request(prev_pair->graph_state, &value);
- req_str = MC_request_to_string(prev_req, value);
- XBT_DEBUG("%s (state=%p)", req_str, prev_pair->graph_state);
- xbt_free(req_str);
- prev_req = MC_state_get_executed_request(current_pair->graph_state, &value);
- req_str = MC_request_to_string(prev_req, value);
- XBT_DEBUG("%s (state=%p)", req_str, current_pair->graph_state);
- xbt_free(req_str);
- }
- if(!MC_state_process_is_done(prev_pair->graph_state, req->issuer)){
- MC_state_interleave_process(prev_pair->graph_state, req->issuer);
-
- } else {
- XBT_DEBUG("Process %p is in done set", req->issuer);
- }
+ }
- break;
- }
- }
+ } else {
- if(MC_state_interleave_size(current_pair->graph_state)){
- MC_restore_snapshot(current_pair->system_state);
- xbt_fifo_unshift(mc_snapshot_stack, current_pair);
- XBT_DEBUG("Back-tracking to depth %d", xbt_fifo_size(mc_snapshot_stack));
- MC_UNSET_RAW_MEM;
- break;
- }
- }
+ XBT_WARN("/!\\ Max depth reached ! /!\\ ");
+ if (MC_state_interleave_size(current_pair->graph_state) > 0) {
+ XBT_WARN
+ ("/!\\ But, there are still processes to interleave. Model-checker will not be able to ensure the soundness of the verification from now. /!\\ ");
+ if (_sg_mc_max_depth == 1000)
+ XBT_WARN
+ ("Notice : the default value of max depth is 1000 but you can change it with cfg=model-check/max_depth:value.");
+ }
- MC_UNSET_RAW_MEM;
+ }
- }
+ if (xbt_fifo_size(mc_stack) == _sg_mc_max_depth) {
+ XBT_DEBUG("Pair %d (depth = %d) shifted in stack, maximum depth reached",
+ current_pair->num, xbt_fifo_size(mc_stack));
+ } else {
+ XBT_DEBUG("Pair %d (depth = %d) shifted in stack", current_pair->num,
+ xbt_fifo_size(mc_stack));
}
- MC_UNSET_RAW_MEM;
- return;
+
+
+ MC_SET_MC_HEAP;
+ xbt_dynar_free(&prop_values);
+ current_pair = xbt_fifo_shift(mc_stack);
+ if (xbt_fifo_size(mc_stack) != _sg_mc_max_depth - 1
+ && current_pair->requests > 0 && current_pair->search_cycle) {
+ remove_acceptance_pair(current_pair->num);
+ }
+ MC_pair_delete(current_pair);
+
+ MC_SET_STD_HEAP;
+
}
