-/* Copyright (c) 2008-2012 Da SimGrid Team. All rights reserved. */
+/* Copyright (c) 2011-2014. The SimGrid Team.
+ * All rights reserved. */
/* 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. */
-#include "mc_private.h"
#include <unistd.h>
#include <sys/wait.h>
-XBT_LOG_NEW_DEFAULT_SUBCATEGORY(mc_liveness, mc,
- "Logging specific to algorithms for liveness properties verification");
-
-xbt_dynar_t reached_pairs;
-xbt_dynar_t visited_pairs;
-xbt_dynar_t successors;
+#include <xbt/dynar.h>
+#include <xbt/automaton.h>
-int create_dump(int pair)
-{
- // Try to enable core dumps
- struct rlimit core_limit;
- core_limit.rlim_cur = RLIM_INFINITY;
- core_limit.rlim_max = RLIM_INFINITY;
-
- if(setrlimit(RLIMIT_CORE, &core_limit) < 0)
- fprintf(stderr, "setrlimit: %s\nWarning: core dumps may be truncated or non-existant\n", strerror(errno));
-
- int status;
- switch(fork()){
- case 0:
- // We are the child process -- run the actual program
- xbt_abort();
- break;
-
- case -1:
- // An error occurred, shouldn't happen
- perror("fork");
- return -1;
-
- default:
- // We are the parent process -- wait for the child process to exit
- if(wait(&status) < 0)
- perror("wait");
- if(WIFSIGNALED(status) && WCOREDUMP(status)){
- char *core_name = xbt_malloc(20);
- sprintf(core_name,"core_%d", pair);
- rename("core", core_name);
- free(core_name);
- }
- }
+#include "mc_request.h"
+#include "mc_liveness.h"
+#include "mc_private.h"
+#include "mc_record.h"
+#include "mc_smx.h"
- return 0;
-}
+XBT_LOG_NEW_DEFAULT_SUBCATEGORY(mc_liveness, mc,
+ "Logging specific to algorithms for liveness properties verification");
-int reached(xbt_state_t st){
+/********* Global variables *********/
- int raw_mem_set = (mmalloc_get_current_heap() == raw_heap);
+xbt_dynar_t acceptance_pairs;
+xbt_parmap_t parmap;
- MC_SET_RAW_MEM;
+/********* Static functions *********/
- mc_pair_reached_t new_pair = NULL;
- new_pair = xbt_new0(s_mc_pair_reached_t, 1);
- new_pair->nb = xbt_dynar_length(reached_pairs) + 1;
- new_pair->automaton_state = st;
- new_pair->prop_ato = xbt_dynar_new(sizeof(int), NULL);
- new_pair->system_state = MC_take_snapshot();
-
- /* Get values of propositional symbols */
- int res;
- int_f_void_t f;
+static xbt_dynar_t get_atomic_propositions_values()
+{
unsigned int cursor = 0;
- xbt_propositional_symbol_t ps = NULL;
- xbt_dynar_foreach(_mc_property_automaton->propositional_symbols, cursor, ps){
- f = (int_f_void_t)ps->function;
- res = f();
- xbt_dynar_push_as(new_pair->prop_ato, int, res);
+ 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) {
+ int res = xbt_automaton_propositional_symbol_evaluate(ps);
+ xbt_dynar_push_as(values, int, res);
}
-
- MC_UNSET_RAW_MEM;
-
- if(xbt_dynar_is_empty(reached_pairs)/* || !compare*/){
-
- MC_SET_RAW_MEM;
- /* New pair reached */
- xbt_dynar_push(reached_pairs, &new_pair);
- MC_UNSET_RAW_MEM;
- if(raw_mem_set)
- MC_SET_RAW_MEM;
-
- return 0;
-
- }else{
+ return values;
+}
- MC_SET_RAW_MEM;
-
- cursor = 0;
- mc_pair_reached_t pair_test = NULL;
-
- xbt_dynar_foreach(reached_pairs, cursor, pair_test){
- if(XBT_LOG_ISENABLED(mc_liveness, xbt_log_priority_debug))
- XBT_DEBUG("****** Pair reached #%d ******", pair_test->nb);
- if(automaton_state_compare(pair_test->automaton_state, st) == 0){
- if(propositional_symbols_compare_value(pair_test->prop_ato, new_pair->prop_ato) == 0){
- if(snapshot_compare(new_pair->system_state, pair_test->system_state) == 0){
-
- if(raw_mem_set)
- MC_SET_RAW_MEM;
- else
- MC_UNSET_RAW_MEM;
-
- return 1;
+static mc_visited_pair_t is_reached_acceptance_pair(mc_pair_t pair) {
+ xbt_mheap_t heap = mmalloc_set_current_heap(mc_heap);
+
+ mc_visited_pair_t new_pair = NULL;
+ new_pair = MC_visited_pair_new(pair->num, pair->automaton_state, pair->atomic_propositions, pair->graph_state);
+ new_pair->acceptance_pair = 1;
+
+ if (xbt_dynar_is_empty(acceptance_pairs)) {
+
+ xbt_dynar_push(acceptance_pairs, &new_pair);
+
+ } else {
+
+ int min = -1, max = -1, index;
+ //int res;
+ mc_visited_pair_t pair_test;
+ int cursor;
+
+ index = get_search_interval(acceptance_pairs, new_pair, &min, &max);
+
+ if (min != -1 && max != -1) { // Acceptance pair with same number of processes and same heap bytes used exists
+
+ // 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;
+ } */
+
+ cursor = min;
+ if(pair->search_cycle == 1){
+ 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, new_pair->automaton_state) == 0) {
+ if (xbt_automaton_propositional_symbols_compare_value(pair_test->atomic_propositions, new_pair->atomic_propositions) == 0) {
+ if (snapshot_compare(pair_test, new_pair) == 0) {
+ XBT_INFO("Pair %d already reached (equal to pair %d) !", new_pair->num, pair_test->num);
+ 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);
+ mmalloc_set_current_heap(heap);
+ return NULL;
+ }
+ }
}
- }else{
- XBT_DEBUG("Different values of propositional symbols");
+ cursor++;
}
- }else{
- XBT_DEBUG("Different automaton state");
+ }
+ xbt_dynar_insert_at(acceptance_pairs, min, &new_pair);
+ } else {
+ pair_test = (mc_visited_pair_t) xbt_dynar_get_as(acceptance_pairs, index, mc_visited_pair_t);
+ if (pair_test->nb_processes < new_pair->nb_processes) {
+ xbt_dynar_insert_at(acceptance_pairs, index + 1, &new_pair);
+ } else {
+ if (pair_test->heap_bytes_used < new_pair->heap_bytes_used)
+ xbt_dynar_insert_at(acceptance_pairs, index + 1, &new_pair);
+ else
+ xbt_dynar_insert_at(acceptance_pairs, index, &new_pair);
}
}
- /* New pair reached */
- xbt_dynar_push(reached_pairs, &new_pair);
-
- MC_UNSET_RAW_MEM;
-
- if(raw_mem_set)
- MC_SET_RAW_MEM;
-
- compare = 0;
-
- return 0;
-
}
+ mmalloc_set_current_heap(heap);
+ return new_pair;
}
+static void remove_acceptance_pair(int pair_num)
+{
+ xbt_mheap_t heap = mmalloc_set_current_heap(mc_heap);
-void set_pair_reached(xbt_state_t st){
-
- int raw_mem_set = (mmalloc_get_current_heap() == raw_heap);
-
- MC_SET_RAW_MEM;
-
- mc_pair_reached_t pair = NULL;
- pair = xbt_new0(s_mc_pair_reached_t, 1);
- pair->nb = xbt_dynar_length(reached_pairs) + 1;
- pair->automaton_state = st;
- pair->prop_ato = xbt_dynar_new(sizeof(int), NULL);
- pair->system_state = MC_take_snapshot();
-
- /* Get values of propositional symbols */
unsigned int cursor = 0;
- xbt_propositional_symbol_t ps = NULL;
- int res;
- int_f_void_t f;
-
- xbt_dynar_foreach(_mc_property_automaton->propositional_symbols, cursor, ps){
- f = (int_f_void_t)ps->function;
- res = f();
- xbt_dynar_push_as(pair->prop_ato, int, res);
- }
-
- xbt_dynar_push(reached_pairs, &pair);
-
- MC_UNSET_RAW_MEM;
-
- if(raw_mem_set)
- MC_SET_RAW_MEM;
-
-}
-
-int visited(xbt_state_t st){
-
- if(_sg_mc_visited == 0)
- return 0;
-
- int raw_mem_set = (mmalloc_get_current_heap() == raw_heap);
+ mc_visited_pair_t pair_test = NULL;
+ int pair_found = 0;
- MC_SET_RAW_MEM;
-
- mc_pair_visited_t new_pair = NULL;
- new_pair = xbt_new0(s_mc_pair_visited_t, 1);
- new_pair->automaton_state = st;
- new_pair->prop_ato = xbt_dynar_new(sizeof(int), NULL);
- new_pair->system_state = MC_take_snapshot();
-
- /* Get values of propositional symbols */
- int res;
- int_f_void_t f;
- unsigned int cursor = 0;
- xbt_propositional_symbol_t ps = NULL;
- xbt_dynar_foreach(_mc_property_automaton->propositional_symbols, cursor, ps){
- f = (int_f_void_t)ps->function;
- res = f();
- xbt_dynar_push_as(new_pair->prop_ato, int, res);
+ xbt_dynar_foreach(acceptance_pairs, cursor, pair_test) {
+ if (pair_test->num == pair_num) {
+ pair_found = 1;
+ break;
+ }
}
-
- MC_UNSET_RAW_MEM;
-
- if(xbt_dynar_is_empty(visited_pairs)){
-
- MC_SET_RAW_MEM;
- /* New pair visited */
- xbt_dynar_push(visited_pairs, &new_pair);
- MC_UNSET_RAW_MEM;
-
- if(raw_mem_set)
- MC_SET_RAW_MEM;
-
- return 0;
- }else{
-
- MC_SET_RAW_MEM;
-
- cursor = 0;
- mc_pair_visited_t pair_test = NULL;
-
- xbt_dynar_foreach(visited_pairs, cursor, pair_test){
- if(XBT_LOG_ISENABLED(mc_liveness, xbt_log_priority_debug))
- XBT_DEBUG("****** Pair visited #%d ******", cursor + 1);
- if(automaton_state_compare(pair_test->automaton_state, st) == 0){
- if(propositional_symbols_compare_value(pair_test->prop_ato, new_pair->prop_ato) == 0){
- if(snapshot_compare(new_pair->system_state, pair_test->system_state) == 0){
- if(raw_mem_set)
- MC_SET_RAW_MEM;
- else
- MC_UNSET_RAW_MEM;
-
- return 1;
- }
- }else{
- XBT_DEBUG("Different values of propositional symbols");
- }
- }else{
- XBT_DEBUG("Different automaton state");
- }
- }
+ if(pair_found == 1) {
+ xbt_dynar_remove_at(acceptance_pairs, cursor, &pair_test);
- if(xbt_dynar_length(visited_pairs) == _sg_mc_visited){
- xbt_dynar_remove_at(visited_pairs, 0, NULL);
- }
+ pair_test->acceptance_removed = 1;
- /* New pair visited */
- xbt_dynar_push(visited_pairs, &new_pair);
-
- MC_UNSET_RAW_MEM;
+ if (_sg_mc_visited == 0 || pair_test->visited_removed == 1)
+ MC_visited_pair_delete(pair_test);
- if(raw_mem_set)
- MC_SET_RAW_MEM;
-
- return 0;
-
}
-}
-void MC_pair_delete(mc_pair_t pair){
- xbt_free(pair->graph_state->proc_status);
- xbt_free(pair->graph_state);
- xbt_free(pair);
+ mmalloc_set_current_heap(heap);
}
+static int MC_automaton_evaluate_label(xbt_automaton_exp_label_t l,
+ xbt_dynar_t atomic_propositions_values)
+{
-int MC_automaton_evaluate_label(xbt_exp_label_t l){
-
- switch(l->type){
- case 0 : {
- int left_res = MC_automaton_evaluate_label(l->u.or_and.left_exp);
- int right_res = MC_automaton_evaluate_label(l->u.or_and.right_exp);
- return (left_res || right_res);
- }
- case 1 : {
- int left_res = MC_automaton_evaluate_label(l->u.or_and.left_exp);
- int right_res = MC_automaton_evaluate_label(l->u.or_and.right_exp);
- return (left_res && right_res);
- }
- case 2 : {
- int res = MC_automaton_evaluate_label(l->u.exp_not);
- return (!res);
- }
- case 3 : {
- unsigned int cursor = 0;
- xbt_propositional_symbol_t p = NULL;
- int_f_void_t f;
- xbt_dynar_foreach(_mc_property_automaton->propositional_symbols, cursor, p){
- if(strcmp(p->pred, l->u.predicat) == 0){
- f = (int_f_void_t)p->function;
- return f();
+ 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);
+ }
+ 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(xbt_automaton_propositional_symbol_get_name(p), l->u.predicat) == 0)
+ return (int) xbt_dynar_get_as(atomic_propositions_values, cursor, int);
}
+ return -1;
}
+ case 4:{
+ return 2;
+ }
+ default:
return -1;
}
- case 4 : {
- return 2;
- }
- default :
- return -1;
- }
-}
-
-
-/********************* Double-DFS stateless *******************/
-
-void pair_visited_free(mc_pair_visited_t pair){
- if(pair){
- xbt_dynar_free(&(pair->prop_ato));
- MC_free_snapshot(pair->system_state);
- xbt_free(pair);
- }
-}
-
-void pair_visited_free_voidp(void *p){
- pair_visited_free((mc_pair_visited_t) * (void **) p);
-}
-
-void pair_stateless_free(mc_pair_stateless_t pair){
- xbt_free(pair->graph_state->system_state);
- xbt_free(pair->graph_state->proc_status);
- xbt_free(pair->graph_state);
- xbt_free(pair);
-}
-
-void pair_stateless_free_voidp(void *p){
- pair_stateless_free((mc_pair_stateless_t) * (void **) p);
-}
-
-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 pair_reached_free(mc_pair_reached_t pair){
- if(pair){
- xbt_dynar_free(&(pair->prop_ato));
- MC_free_snapshot(pair->system_state);
- xbt_free(pair);
- }
-}
-
-void pair_reached_free_voidp(void *p){
- pair_reached_free((mc_pair_reached_t) * (void **) p);
}
-void MC_ddfs_init(void){
-
- initial_state_liveness->raw_mem_set = (mmalloc_get_current_heap() == raw_heap);
+void MC_pre_modelcheck_liveness(void) {
- XBT_DEBUG("**************************************************");
- XBT_DEBUG("Double-DFS init");
- XBT_DEBUG("**************************************************");
+ initial_global_state->raw_mem_set = (mmalloc_get_current_heap() == mc_heap);
- mc_pair_stateless_t mc_initial_pair = NULL;
- mc_state_t initial_graph_state = NULL;
- smx_process_t process;
+ mc_pair_t initial_pair = NULL;
+ 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);
- }
- }
+ MC_SET_MC_HEAP;
- reached_pairs = xbt_dynar_new(sizeof(mc_pair_reached_t), pair_reached_free_voidp);
- visited_pairs = xbt_dynar_new(sizeof(mc_pair_visited_t), pair_visited_free_voidp);
- successors = xbt_dynar_new(sizeof(mc_pair_stateless_t), NULL);
+ acceptance_pairs = xbt_dynar_new(sizeof(mc_visited_pair_t), NULL);
+ if(_sg_mc_visited > 0)
+ visited_pairs = xbt_dynar_new(sizeof(mc_visited_pair_t), NULL);
- /* Save the initial state */
- initial_state_liveness->snapshot = MC_take_snapshot();
+ initial_global_state->snapshot = MC_take_snapshot(0);
+ initial_global_state->prev_pair = 0;
- MC_UNSET_RAW_MEM;
-
unsigned int cursor = 0;
- xbt_state_t state;
-
- xbt_dynar_foreach(_mc_property_automaton->states, cursor, state){
- if(state->type == -1){
-
- 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, mc_initial_pair);
- MC_UNSET_RAW_MEM;
-
- if(cursor != 0){
- MC_restore_snapshot(initial_state_liveness->snapshot);
- MC_UNSET_RAW_MEM;
- }
-
- 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, mc_initial_pair);
- MC_UNSET_RAW_MEM;
+ xbt_automaton_state_t automaton_state;
+
+ xbt_dynar_foreach(_mc_property_automaton->states, cursor, automaton_state) {
+ if (automaton_state->type == -1) { /* Initial automaton state */
+
+ 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();
+ initial_pair->depth = 1;
+
+ /* Get enabled processes and insert them in the interleave set of the graph_state */
+ MC_EACH_SIMIX_PROCESS(process,
+ if (MC_process_is_enabled(process)) {
+ MC_state_interleave_process(initial_pair->graph_state, process);
+ }
+ );
- set_pair_reached(state);
+ initial_pair->requests = MC_state_interleave_size(initial_pair->graph_state);
+ initial_pair->search_cycle = 0;
- if(cursor != 0){
- MC_restore_snapshot(initial_state_liveness->snapshot);
- MC_UNSET_RAW_MEM;
- }
-
- MC_ddfs(1);
-
- }
+ xbt_fifo_unshift(mc_stack, initial_pair);
}
}
- if(initial_state_liveness->raw_mem_set)
- MC_SET_RAW_MEM;
- else
- MC_UNSET_RAW_MEM;
+ MC_SET_STD_HEAP;
+ MC_modelcheck_liveness();
+ if (initial_global_state->raw_mem_set)
+ MC_SET_MC_HEAP;
}
-
-void MC_ddfs(int search_cycle){
-
- //initial_state_liveness->raw_mem_set = (mmalloc_get_current_heap() == raw_heap);
-
- smx_process_t process;
- mc_pair_stateless_t current_pair = NULL;
-
- 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));
-
- /* Update current state in buchi automaton */
- _mc_property_automaton->current_state = current_pair->automaton_state;
-
-
- XBT_DEBUG("********************* ( Depth = %d, search_cycle = %d )", xbt_fifo_size(mc_stack_liveness), search_cycle);
-
- mc_stats_pair->visited_pairs++;
-
- //sleep(1);
-
- int value;
- mc_state_t next_graph_state = NULL;
+void MC_modelcheck_liveness()
+{
+ smx_process_t process = NULL;
+ mc_pair_t current_pair = NULL;
+ int value, res, visited_num = -1;
smx_simcall_t req = NULL;
- char *req_str;
-
- xbt_transition_t transition_succ;
- unsigned int cursor = 0;
- int res;
-
- mc_pair_stateless_t next_pair = NULL;
- mc_pair_stateless_t pair_succ;
-
- mc_pair_stateless_t remove_pair;
- mc_pair_reached_t remove_pair_reached;
+ xbt_automaton_transition_t transition_succ = NULL;
+ int cursor = 0;
+ mc_pair_t next_pair = NULL;
+ xbt_dynar_t prop_values = NULL;
+ mc_visited_pair_t reached_pair = NULL;
- if(xbt_fifo_size(mc_stack_liveness) < _sg_mc_max_depth){
-
- if(current_pair->requests > 0){
-
- while((req = MC_state_get_request(current_pair->graph_state, &value)) != NULL){
-
- /* 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_simcall_pre(req, value);
-
- /* Wait for requests (schedules processes) */
- MC_wait_for_requests();
-
- MC_SET_RAW_MEM;
-
- /* Create the new expanded graph_state */
- 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)){
- XBT_DEBUG("Process %lu enabled with simcall : %d", process->pid, (&process->simcall)->call);
- }
- }
-
- xbt_swag_foreach(process, simix_global->process_list){
- if(MC_process_is_enabled(process)){
- MC_state_interleave_process(next_graph_state, process);
- }
- }
-
- xbt_dynar_reset(successors);
-
- MC_UNSET_RAW_MEM;
-
-
- cursor= 0;
- xbt_dynar_foreach(current_pair->automaton_state->out, cursor, transition_succ){
-
- res = MC_automaton_evaluate_label(transition_succ->label);
-
- 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;
- }
-
+ while(xbt_fifo_size(mc_stack) > 0){
+
+ /* 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;
+
+ XBT_DEBUG("********************* ( Depth = %d, search_cycle = %d, interleave size %d, pair_num %d)",
+ current_pair->depth, current_pair->search_cycle,
+ MC_state_interleave_size(current_pair->graph_state), current_pair->num);
+
+ if (current_pair->requests > 0) {
+
+ if (current_pair->automaton_state->type == 1 && current_pair->exploration_started == 0) {
+ /* If new acceptance pair, return new pair */
+ if ((reached_pair = is_reached_acceptance_pair(current_pair)) == NULL) {
+ int counter_example_depth = current_pair->depth;
+ 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();
}
+ }
- cursor = 0;
-
- xbt_dynar_foreach(current_pair->automaton_state->out, cursor, transition_succ){
-
- res = MC_automaton_evaluate_label(transition_succ->label);
-
- 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;
- }
+ /* Pair already visited ? stop the exploration on the current path */
+ if ((current_pair->exploration_started == 0) && (visited_num = is_visited_pair(reached_pair, current_pair)) != -1) {
+ if (dot_output != NULL){
+ MC_SET_MC_HEAP;
+ fprintf(dot_output, "\"%d\" -> \"%d\" [%s];\n", initial_global_state->prev_pair, visited_num, initial_global_state->prev_req);
+ fflush(dot_output);
+ MC_SET_STD_HEAP;
}
- cursor = 0;
-
- xbt_dynar_foreach(successors, cursor, pair_succ){
-
- if(search_cycle == 1){
-
- if((pair_succ->automaton_state->type == 1) || (pair_succ->automaton_state->type == 2)){
-
- if(reached(pair_succ->automaton_state)){
+ XBT_DEBUG("Pair already visited (equal to pair %d), exploration on the current path stopped.", visited_num);
+ MC_SET_MC_HEAP;
+ current_pair->requests = 0;
+ MC_SET_STD_HEAP;
+ goto backtracking;
- XBT_INFO("Next pair (depth = %d, %u 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(mc_stack_liveness);
- MC_dump_stack_liveness(mc_stack_liveness);
- MC_print_statistics_pairs(mc_stats_pair);
- xbt_abort();
-
- }else{
-
- if(visited(pair_succ->automaton_state)){
-
- XBT_DEBUG("Next pair already visited !");
- break;
-
- }else{
-
- XBT_DEBUG("Next pair (depth =%d) -> Acceptance pair (%s)", xbt_fifo_size(mc_stack_liveness) + 1, pair_succ->automaton_state->id);
-
- XBT_DEBUG("Reached pairs : %lu", xbt_dynar_length(reached_pairs));
+ }else{
- MC_SET_RAW_MEM;
- xbt_fifo_unshift(mc_stack_liveness, pair_succ);
- MC_UNSET_RAW_MEM;
-
- MC_ddfs(search_cycle);
-
+ req = MC_state_get_request(current_pair->graph_state, &value);
+
+ if (dot_output != NULL) {
+ MC_SET_MC_HEAP;
+ 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;
+ 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);
+ fflush(dot_output);
+ MC_SET_STD_HEAP;
+ }
+
+ char* req_str = MC_request_to_string(req, value);
+ XBT_DEBUG("Execute: %s", req_str);
+ xbt_free(req_str);
+
+ /* Set request as executed */
+ MC_state_set_executed_request(current_pair->graph_state, req, value);
+
+ /* Update mc_stats */
+ mc_stats->executed_transitions++;
+ if(current_pair->exploration_started == 0)
+ mc_stats->visited_pairs++;
+
+ /* Answer the request */
+ MC_simcall_handle(req, value);
+
+ /* Wait for requests (schedules processes) */
+ MC_wait_for_requests();
+
+ MC_SET_MC_HEAP;
+
+ current_pair->requests--;
+ current_pair->exploration_started = 1;
+
+ /* Get values of atomic propositions (variables used in the property formula) */
+ prop_values = get_atomic_propositions_values();
+
+ /* Evaluate enabled/true transitions in automaton according to atomic propositions values and create new pairs */
+ cursor = xbt_dynar_length(current_pair->automaton_state->out) - 1;
+ while (cursor >= 0) {
+ transition_succ = (xbt_automaton_transition_t)xbt_dynar_get_as(current_pair->automaton_state->out, cursor, xbt_automaton_transition_t);
+ res = MC_automaton_evaluate_label(transition_succ->label, prop_values);
+ if (res == 1 || res == 2) { /* 1 = True transition (always enabled), 2 = enabled transition according to atomic prop values */
+ 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();
+ next_pair->depth = current_pair->depth + 1;
+ /* Get enabled processes and insert them in the interleave set of the next graph_state */
+ MC_EACH_SIMIX_PROCESS(process,
+ if (MC_process_is_enabled(process)) {
+ MC_state_interleave_process(next_pair->graph_state, process);
}
+ );
- }
-
- }else{
-
- if(visited(pair_succ->automaton_state)){
-
- XBT_DEBUG("Next pair already visited !");
- break;
-
- }else{
-
- MC_SET_RAW_MEM;
- xbt_fifo_unshift(mc_stack_liveness, pair_succ);
- MC_UNSET_RAW_MEM;
-
- MC_ddfs(search_cycle);
- }
-
- }
-
- }else{
-
- if(visited(pair_succ->automaton_state)){
-
- XBT_DEBUG("Next pair already visited !");
- break;
-
- }else{
-
- if(((pair_succ->automaton_state->type == 1) || (pair_succ->automaton_state->type == 2))){
-
- XBT_DEBUG("Next pair (depth =%d) -> Acceptance pair (%s)", xbt_fifo_size(mc_stack_liveness) + 1, pair_succ->automaton_state->id);
-
- set_pair_reached(pair_succ->automaton_state);
-
- search_cycle = 1;
-
- XBT_DEBUG("Reached pairs : %lu", xbt_dynar_length(reached_pairs));
-
- }
-
- MC_SET_RAW_MEM;
- xbt_fifo_unshift(mc_stack_liveness, pair_succ);
- MC_UNSET_RAW_MEM;
-
- MC_ddfs(search_cycle);
-
- }
-
- }
-
- /* 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 %d", xbt_fifo_size(mc_stack_liveness));
- MC_replay_liveness(mc_stack_liveness, 0);
- }
- }
-
-
- }else{
-
- XBT_DEBUG("No more request to execute in this state, search evolution in Büchi Automaton.");
-
- MC_SET_RAW_MEM;
-
- /* Create the new expanded graph_state */
- next_graph_state = MC_state_pair_new();
-
- xbt_dynar_reset(successors);
-
- MC_UNSET_RAW_MEM;
-
+ next_pair->requests = MC_state_interleave_size(next_pair->graph_state);
- cursor= 0;
- xbt_dynar_foreach(current_pair->automaton_state->out, cursor, transition_succ){
+ /* FIXME : get search_cycle value for each acceptant state */
+ if (next_pair->automaton_state->type == 1 || current_pair->search_cycle)
+ next_pair->search_cycle = 1;
- res = MC_automaton_evaluate_label(transition_succ->label);
-
- 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;
-
- xbt_dynar_foreach(current_pair->automaton_state->out, cursor, transition_succ){
-
- res = MC_automaton_evaluate_label(transition_succ->label);
-
- 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;
-
- xbt_dynar_foreach(successors, cursor, pair_succ){
-
- if(search_cycle == 1){
-
- if((pair_succ->automaton_state->type == 1) || (pair_succ->automaton_state->type == 2)){
-
- if(reached(pair_succ->automaton_state)){
-
- XBT_INFO("Next pair (depth = %d) already reached !", xbt_fifo_size(mc_stack_liveness) + 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);
- xbt_abort();
-
- }else{
-
- XBT_INFO("Next pair (depth = %d) -> Acceptance pair (%s)", xbt_fifo_size(mc_stack_liveness) + 1, pair_succ->automaton_state->id);
-
- XBT_INFO("Reached pairs : %lu", xbt_dynar_length(reached_pairs));
+ /* Add new pair to the exploration stack */
+ xbt_fifo_unshift(mc_stack, next_pair);
- MC_SET_RAW_MEM;
- xbt_fifo_unshift(mc_stack_liveness, pair_succ);
- MC_UNSET_RAW_MEM;
+ }
+ cursor--;
+ }
+
+ MC_SET_STD_HEAP;
- MC_ddfs(search_cycle);
-
- }
-
- }else{
-
- MC_SET_RAW_MEM;
- xbt_fifo_unshift(mc_stack_liveness, pair_succ);
- MC_UNSET_RAW_MEM;
-
- MC_ddfs(search_cycle);
-
- }
+ } /* End of visited_pair test */
+ } else {
+ backtracking:
+ if(visited_num == -1)
+ XBT_DEBUG("No more request to execute. Looking for backtracking point.");
+
+ MC_SET_MC_HEAP;
+
+ xbt_dynar_free(&prop_values);
+
+ /* Traverse the stack backwards until a pair with a non empty interleave
+ set is found, deleting all the pairs that have it empty in the way. */
+ while ((current_pair = xbt_fifo_shift(mc_stack)) != NULL) {
+ if (current_pair->requests > 0) {
+ /* We found a backtracking point */
+ XBT_DEBUG("Backtracking to depth %d", current_pair->depth);
+ xbt_fifo_unshift(mc_stack, current_pair);
+ MC_SET_STD_HEAP;
+ MC_replay_liveness(mc_stack);
+ XBT_DEBUG("Backtracking done");
+ break;
}else{
-
- if(((pair_succ->automaton_state->type == 1) || (pair_succ->automaton_state->type == 2))){
-
- set_pair_reached(pair_succ->automaton_state);
-
- search_cycle = 1;
-
- XBT_INFO("Reached pairs : %lu", xbt_dynar_length(reached_pairs));
-
- }
-
- MC_SET_RAW_MEM;
- xbt_fifo_unshift(mc_stack_liveness, pair_succ);
- MC_UNSET_RAW_MEM;
-
- MC_ddfs(search_cycle);
-
+ /* Delete pair */
+ XBT_DEBUG("Delete pair %d at depth %d", current_pair->num, current_pair->depth);
+ if (current_pair->automaton_state->type == 1)
+ remove_acceptance_pair(current_pair->num);
+ MC_pair_delete(current_pair);
}
-
- /* Restore system before checking others successors */
- if(cursor != xbt_dynar_length(successors) - 1)
- MC_replay_liveness(mc_stack_liveness, 1);
-
- }
-
- }
-
- }else{
+ }
- XBT_WARN("/!\\ Max depth reached ! /!\\ ");
- if(current_pair->requests > 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. /!\\ ");
- XBT_WARN("Notice : the default value of max depth is 1000 but you can change it with cfg=model-check/max_depth:value.");
- }
+ MC_SET_STD_HEAP;
+ } /* End of if (current_pair->requests > 0) else ... */
- }
-
- if(xbt_fifo_size(mc_stack_liveness) == _sg_mc_max_depth ){
- XBT_DEBUG("Pair (depth = %d) shifted in stack, maximum depth reached", xbt_fifo_size(mc_stack_liveness) );
- }else{
- XBT_DEBUG("Pair (depth = %d) shifted in stack", xbt_fifo_size(mc_stack_liveness) );
- }
-
+ } /* End of while(xbt_fifo_size(mc_stack) > 0) */
- MC_SET_RAW_MEM;
- remove_pair = xbt_fifo_shift(mc_stack_liveness);
- xbt_fifo_remove(mc_stack_liveness, remove_pair);
- remove_pair = NULL;
- if((current_pair->automaton_state->type == 1) || (current_pair->automaton_state->type == 2)){
- remove_pair_reached = xbt_dynar_pop_as(reached_pairs, mc_pair_reached_t);
- pair_reached_free(remove_pair_reached);
- remove_pair_reached = NULL;
- }
- MC_UNSET_RAW_MEM;
-
- /*if(initial_state_liveness->raw_mem_set)
- MC_SET_RAW_MEM;*/
-
}
