X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/ee52f84fe512219acf534c4d4654c3df56659e91..e0300cbd373040c590de77e64cc6c6e5fc3c28bb:/src/mc/mc_liveness.c diff --git a/src/mc/mc_liveness.c b/src/mc/mc_liveness.c index 27889aca59..4d7c048ec0 100644 --- a/src/mc/mc_liveness.c +++ b/src/mc/mc_liveness.c @@ -1,980 +1,398 @@ -/* Copyright (c) 2011-2013 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 #include +#include +#include + +#include "mc_request.h" +#include "mc_liveness.h" +#include "mc_private.h" +#include "mc_record.h" +#include "mc_smx.h" + XBT_LOG_NEW_DEFAULT_SUBCATEGORY(mc_liveness, mc, "Logging specific to algorithms for liveness properties verification"); /********* Global variables *********/ xbt_dynar_t acceptance_pairs; -xbt_dynar_t visited_pairs; -xbt_dynar_t successors; - +xbt_parmap_t parmap; /********* Static functions *********/ -static xbt_dynar_t get_atomic_propositions_values(){ - int res; - int_f_void_t f; +static xbt_dynar_t get_atomic_propositions_values() +{ 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_foreach(_mc_property_automaton->propositional_symbols, cursor, ps) { + int res = xbt_automaton_propositional_symbol_evaluate(ps); xbt_dynar_push_as(values, int, res); } return values; } -static int is_reached_acceptance_pair(mc_pair_t pair){ - - int raw_mem_set = (mmalloc_get_current_heap() == raw_heap); - - if(xbt_dynar_is_empty(acceptance_pairs)){ - - MC_SET_RAW_MEM; - if(pair->graph_state->system_state == NULL){ - pair->graph_state->system_state = MC_take_snapshot(); - pair->heap_bytes_used = mmalloc_get_bytes_used(std_heap); - } - xbt_dynar_push(acceptance_pairs, &pair); - MC_UNSET_RAW_MEM; - - if(raw_mem_set) - MC_SET_RAW_MEM; - - return -1; - - }else{ - - MC_SET_RAW_MEM; - - if(pair->graph_state->system_state == NULL){ - pair->graph_state->system_state = MC_take_snapshot(); - pair->heap_bytes_used = mmalloc_get_bytes_used(std_heap); - } - - size_t current_bytes_used = pair->heap_bytes_used; - int current_nb_processes = pair->nb_processes; - - unsigned int cursor = 0; - int previous_cursor = 0, next_cursor = 0; - int start = 0; - int end = xbt_dynar_length(acceptance_pairs) - 1; - - mc_pair_t pair_test = NULL; - size_t bytes_used_test; - int nb_processes_test; - int same_processes_and_bytes_not_found = 1; - - while(start <= end && same_processes_and_bytes_not_found){ - cursor = (start + end) / 2; - pair_test = (mc_pair_t)xbt_dynar_get_as(acceptance_pairs, cursor, mc_pair_t); - bytes_used_test = pair_test->heap_bytes_used; - nb_processes_test = pair_test->nb_processes; - if(nb_processes_test < current_nb_processes) - start = cursor + 1; - else if(nb_processes_test > current_nb_processes) - end = cursor - 1; - else if(nb_processes_test == current_nb_processes){ - if(bytes_used_test < current_bytes_used) - start = cursor + 1; - else if(bytes_used_test > current_bytes_used) - end = cursor - 1; - else if(bytes_used_test == current_bytes_used){ - same_processes_and_bytes_not_found = 0; - 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){ - XBT_DEBUG("Compare with state %d", pair_test->num); - if(snapshot_compare(pair->graph_state->system_state, pair_test->graph_state->system_state) == 0){ - if(raw_mem_set) - MC_SET_RAW_MEM; - else - MC_UNSET_RAW_MEM; - return pair_test->num; - } - } - } - /* Search another pair with same number of bytes used in std_heap */ - previous_cursor = cursor - 1; - while(previous_cursor >= 0){ - pair_test = (mc_pair_t)xbt_dynar_get_as(acceptance_pairs, previous_cursor, mc_pair_t); - bytes_used_test = pair_test->heap_bytes_used; - if(bytes_used_test != current_bytes_used) - break; - 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){ - XBT_DEBUG("Compare with state %d", pair_test->num); - if(snapshot_compare(pair->graph_state->system_state, pair_test->graph_state->system_state) == 0){ - if(raw_mem_set) - MC_SET_RAW_MEM; - else - MC_UNSET_RAW_MEM; - return pair_test->num; - } - } - } - previous_cursor--; - } - next_cursor = cursor + 1; - while(next_cursor < xbt_dynar_length(acceptance_pairs)){ - pair_test = (mc_pair_t)xbt_dynar_get_as(acceptance_pairs, next_cursor, mc_pair_t); - bytes_used_test = pair_test->heap_bytes_used; - if(bytes_used_test != current_bytes_used) - break; - 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){ - XBT_DEBUG("Compare with state %d", pair_test->num); - if(snapshot_compare(pair->graph_state->system_state, pair_test->graph_state->system_state) == 0){ - if(raw_mem_set) - MC_SET_RAW_MEM; - else - MC_UNSET_RAW_MEM; - return pair_test->num; - } +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; } } - next_cursor++; } + cursor++; } } - } - - pair_test = (mc_pair_t)xbt_dynar_get_as(acceptance_pairs, cursor, mc_pair_t); - bytes_used_test = pair_test->heap_bytes_used; - - if(bytes_used_test < current_bytes_used) - xbt_dynar_insert_at(acceptance_pairs, cursor + 1, &pair); - else - xbt_dynar_insert_at(acceptance_pairs, cursor, &pair); - - - MC_UNSET_RAW_MEM; - - if(raw_mem_set) - MC_SET_RAW_MEM; - - return -1; - - } - -} - - -static void set_acceptance_pair_reached(mc_pair_t pair){ - - int raw_mem_set = (mmalloc_get_current_heap() == raw_heap); - - if(xbt_dynar_is_empty(acceptance_pairs)){ - - MC_SET_RAW_MEM; - if(pair->graph_state->system_state == NULL){ - pair->graph_state->system_state = MC_take_snapshot(); - pair->heap_bytes_used = mmalloc_get_bytes_used(std_heap); - } - xbt_dynar_push(acceptance_pairs, &pair); - MC_UNSET_RAW_MEM; - - }else{ - - MC_SET_RAW_MEM; - - if(pair->graph_state->system_state == NULL){ - pair->graph_state->system_state = MC_take_snapshot(); - pair->heap_bytes_used = mmalloc_get_bytes_used(std_heap); - } - - size_t current_bytes_used = pair->heap_bytes_used; - int current_nb_processes = pair->nb_processes; - - unsigned int cursor = 0; - int start = 0; - int end = xbt_dynar_length(acceptance_pairs) - 1; - - mc_pair_t pair_test = NULL; - size_t bytes_used_test = 0; - int nb_processes_test; - - while(start <= end){ - cursor = (start + end) / 2; - pair_test = (mc_pair_t)xbt_dynar_get_as(acceptance_pairs, cursor, mc_pair_t); - bytes_used_test = pair_test->heap_bytes_used; - nb_processes_test = pair_test->nb_processes; - if(nb_processes_test < current_nb_processes) - start = cursor + 1; - if(nb_processes_test > current_nb_processes) - end = cursor - 1; - if(nb_processes_test == current_nb_processes){ - if(bytes_used_test < current_bytes_used) - start = cursor + 1; - if(bytes_used_test > current_bytes_used) - end = cursor - 1; - if(bytes_used_test == current_bytes_used) - break; + 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); } } - if(bytes_used_test < current_bytes_used) - xbt_dynar_insert_at(acceptance_pairs, cursor + 1, &pair); - else - xbt_dynar_insert_at(acceptance_pairs, cursor, &pair); - - MC_UNSET_RAW_MEM; - } - - if(raw_mem_set) - MC_SET_RAW_MEM; - + mmalloc_set_current_heap(heap); + return new_pair; } -static void remove_acceptance_pair(mc_pair_t pair){ +static void remove_acceptance_pair(int pair_num) +{ + xbt_mheap_t heap = mmalloc_set_current_heap(mc_heap); unsigned int cursor = 0; - mc_pair_t pair_test; + mc_visited_pair_t pair_test = NULL; int pair_found = 0; - xbt_dynar_foreach(acceptance_pairs, cursor, pair_test){ - if(pair_test->num == pair->num){ - pair_found = 1; + xbt_dynar_foreach(acceptance_pairs, cursor, pair_test) { + if (pair_test->num == pair_num) { + pair_found = 1; break; } } - if(pair_found) - xbt_dynar_remove_at(acceptance_pairs, cursor, NULL); - - pair->acceptance_removed = 1; - - if(pair->stack_removed && pair->acceptance_removed){ - if(_sg_mc_visited == 0){ - MC_pair_delete(pair); - }else if(pair->visited_removed){ - MC_pair_delete(pair); - } - } + if(pair_found == 1) { + xbt_dynar_remove_at(acceptance_pairs, cursor, &pair_test); -} + pair_test->acceptance_removed = 1; -static int is_visited_pair(mc_pair_t pair){ + if (_sg_mc_visited == 0 || pair_test->visited_removed == 1) + MC_visited_pair_delete(pair_test); - if(_sg_mc_visited == 0) - return -1; - - int raw_mem_set = (mmalloc_get_current_heap() == raw_heap); - - if(xbt_dynar_is_empty(visited_pairs)){ - - MC_SET_RAW_MEM; - if(pair->graph_state->system_state == NULL) - pair->graph_state->system_state = MC_take_snapshot(); - xbt_dynar_push(visited_pairs, &pair); - MC_UNSET_RAW_MEM; - - if(raw_mem_set) - MC_SET_RAW_MEM; + } - return -1; + mmalloc_set_current_heap(heap); +} - }else{ - MC_SET_RAW_MEM; +static int MC_automaton_evaluate_label(xbt_automaton_exp_label_t l, + xbt_dynar_t atomic_propositions_values) +{ - if(pair->graph_state->system_state == NULL) - pair->graph_state->system_state = MC_take_snapshot(); - - size_t current_bytes_used = pair->heap_bytes_used; - int current_nb_processes = pair->nb_processes; - - unsigned int cursor = 0; - int previous_cursor = 0, next_cursor = 0; - int start = 0; - int end = xbt_dynar_length(visited_pairs) - 1; - - mc_pair_t pair_test = NULL; - size_t bytes_used_test; - int nb_processes_test; - int same_processes_and_bytes_not_found = 1; - - while(start <= end && same_processes_and_bytes_not_found){ - cursor = (start + end) / 2; - pair_test = (mc_pair_t)xbt_dynar_get_as(visited_pairs, cursor, mc_pair_t); - bytes_used_test = pair_test->heap_bytes_used; - nb_processes_test = pair_test->nb_processes; - if(nb_processes_test < current_nb_processes) - start = cursor + 1; - else if(nb_processes_test > current_nb_processes) - end = cursor - 1; - else if(nb_processes_test == current_nb_processes){ - if(bytes_used_test < current_bytes_used) - start = cursor + 1; - else if(bytes_used_test > current_bytes_used) - end = cursor - 1; - else if(bytes_used_test == current_bytes_used){ - same_processes_and_bytes_not_found = 0; - 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->graph_state->system_state, pair_test->graph_state->system_state) == 0){ - if(pair_test->other_num == -1) - pair->other_num = pair_test->num; - else - pair->other_num = pair_test->other_num; - if(dot_output == NULL) - XBT_DEBUG("Pair %d already visited ! (equal to pair %d)", pair->num, pair_test->num); - else - XBT_DEBUG("Pair %d already visited ! (equal to pair %d (pair %d in dot_output))", pair->num, pair_test->num, pair->other_num); - xbt_dynar_remove_at(visited_pairs, cursor, NULL); - xbt_dynar_insert_at(visited_pairs, cursor, &pair); - pair_test->visited_removed = 1; - if(pair_test->stack_removed && pair_test->visited_removed){ - if((pair_test->automaton_state->type == 1) || (pair_test->automaton_state->type == 2)){ - if(pair_test->acceptance_removed){ - MC_pair_delete(pair_test); - } - }else{ - MC_pair_delete(pair_test); - } - } - if(raw_mem_set) - MC_SET_RAW_MEM; - else - MC_UNSET_RAW_MEM; - return pair->other_num; - } - } - } - /* Search another pair with same number of bytes used in std_heap */ - previous_cursor = cursor - 1; - while(previous_cursor >= 0){ - pair_test = (mc_pair_t)xbt_dynar_get_as(visited_pairs, previous_cursor, mc_pair_t); - bytes_used_test = pair_test->heap_bytes_used; - if(bytes_used_test != current_bytes_used) - break; - 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->graph_state->system_state, pair_test->graph_state->system_state) == 0){ - if(pair_test->other_num == -1) - pair->other_num = pair_test->num; - else - pair->other_num = pair_test->other_num; - if(dot_output == NULL) - XBT_DEBUG("Pair %d already visited ! (equal to pair %d)", pair->num, pair_test->num); - else - XBT_DEBUG("Pair %d already visited ! (equal to pair %d (pair %d in dot_output))", pair->num, pair_test->num, pair->other_num); - xbt_dynar_remove_at(visited_pairs, previous_cursor, NULL); - xbt_dynar_insert_at(visited_pairs, previous_cursor, &pair); - pair_test->visited_removed = 1; - if(pair_test->stack_removed && pair_test->visited_removed){ - if((pair_test->automaton_state->type == 1) || (pair_test->automaton_state->type == 2)){ - if(pair_test->acceptance_removed){ - MC_pair_delete(pair_test); - } - }else{ - MC_pair_delete(pair_test); - } - } - if(raw_mem_set) - MC_SET_RAW_MEM; - else - MC_UNSET_RAW_MEM; - return pair->other_num; - } - } - } - previous_cursor--; - } - next_cursor = cursor + 1; - while(next_cursor < xbt_dynar_length(visited_pairs)){ - pair_test = (mc_pair_t)xbt_dynar_get_as(visited_pairs, next_cursor, mc_pair_t); - bytes_used_test = pair_test->heap_bytes_used; - if(bytes_used_test != current_bytes_used) - break; - 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->graph_state->system_state, pair_test->graph_state->system_state) == 0){ - if(pair_test->other_num == -1) - pair->other_num = pair_test->num; - else - pair->other_num = pair_test->other_num; - if(dot_output == NULL) - XBT_DEBUG("Pair %d already visited ! (equal to pair %d)", pair->num, pair_test->num); - else - XBT_DEBUG("Pair %d already visited ! (equal to pair %d (pair %d in dot_output))", pair->num, pair_test->num, pair->other_num); - xbt_dynar_remove_at(visited_pairs, next_cursor, NULL); - xbt_dynar_insert_at(visited_pairs, next_cursor, &pair); - pair_test->visited_removed = 1; - if(pair_test->stack_removed && pair_test->visited_removed){ - if((pair_test->automaton_state->type == 1) || (pair_test->automaton_state->type == 2)){ - if(pair_test->acceptance_removed){ - MC_pair_delete(pair_test); - } - }else{ - MC_pair_delete(pair_test); - } - } - if(raw_mem_set) - MC_SET_RAW_MEM; - else - MC_UNSET_RAW_MEM; - return pair->other_num; - } - } - } - next_cursor++; - } - } - } + 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); } - - pair_test = (mc_pair_t)xbt_dynar_get_as(visited_pairs, cursor, mc_pair_t); - bytes_used_test = pair_test->heap_bytes_used; - - if(bytes_used_test < current_bytes_used) - xbt_dynar_insert_at(visited_pairs, cursor + 1, &pair); - else - xbt_dynar_insert_at(visited_pairs, cursor, &pair); - - if(xbt_dynar_length(visited_pairs) > _sg_mc_visited){ - int min = mc_stats->expanded_states; - unsigned int cursor2 = 0; - unsigned int index = 0; - xbt_dynar_foreach(visited_pairs, cursor2, pair_test){ - if(pair_test->num < min){ - index = cursor2; - min = pair_test->num; - } + 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); } - xbt_dynar_remove_at(visited_pairs, index, &pair_test); - pair_test->visited_removed = 1; - if(pair_test->stack_removed && pair_test->acceptance_removed && pair_test->visited_removed) - MC_pair_delete(pair_test); - + return -1; } - - MC_UNSET_RAW_MEM; - - if(raw_mem_set) - MC_SET_RAW_MEM; - - return -1; - - } - -} - -static int MC_automaton_evaluate_label(xbt_automaton_exp_label_t l, xbt_dynar_t atomic_propositions_values){ - - 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(p->pred, l->u.predicat) == 0) - return (int)xbt_dynar_get_as(atomic_propositions_values, cursor, int); + case 4:{ + return 2; } - return -1; - } - case 4 : { - return 2; - } - default : + default: return -1; } } +void MC_pre_modelcheck_liveness(void) { -/********* DDFS Algorithm *********/ - - -void MC_ddfs_init(void){ - - initial_state_liveness->raw_mem_set = (mmalloc_get_current_heap() == raw_heap); - - XBT_DEBUG("**************************************************"); - XBT_DEBUG("Double-DFS init"); - XBT_DEBUG("**************************************************"); + initial_global_state->raw_mem_set = (mmalloc_get_current_heap() == mc_heap); mc_pair_t initial_pair = NULL; - smx_process_t process; + smx_process_t process; MC_wait_for_requests(); - MC_SET_RAW_MEM; + MC_SET_MC_HEAP; - acceptance_pairs = xbt_dynar_new(sizeof(mc_pair_t), NULL); - visited_pairs = xbt_dynar_new(sizeof(mc_pair_t), NULL); - successors = xbt_dynar_new(sizeof(mc_pair_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); - initial_state_liveness->snapshot = MC_take_snapshot(); - initial_state_liveness->prev_pair = 0; + initial_global_state->snapshot = MC_take_snapshot(0); + initial_global_state->prev_pair = 0; - MC_UNSET_RAW_MEM; - unsigned int cursor = 0; xbt_automaton_state_t automaton_state; - - xbt_dynar_foreach(_mc_property_automaton->states, cursor, automaton_state){ - if(automaton_state->type == -1){ /* Initial automaton state */ - - MC_SET_RAW_MEM; + + 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 process and insert it in the interleave set of the graph_state */ - xbt_swag_foreach(process, simix_global->process_list){ - if(MC_process_is_enabled(process)){ + /* 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); } - } + ); initial_pair->requests = MC_state_interleave_size(initial_pair->graph_state); initial_pair->search_cycle = 0; - xbt_fifo_unshift(mc_stack_liveness, initial_pair); - - MC_UNSET_RAW_MEM; - - MC_ddfs(); - - if(cursor != 0){ - MC_restore_snapshot(initial_state_liveness->snapshot); - MC_UNSET_RAW_MEM; - } - - - }else if(automaton_state->type == 2){ /* Acceptance automaton state */ - - MC_SET_RAW_MEM; - - 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(); - - /* Get enabled process and insert it 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); - } - } - - initial_pair->requests = MC_state_interleave_size(initial_pair->graph_state); - initial_pair->search_cycle = 1; - - xbt_fifo_unshift(mc_stack_liveness, initial_pair); - - MC_UNSET_RAW_MEM; - - set_acceptance_pair_reached(initial_pair); - - MC_ddfs(); - - if(cursor != 0){ - MC_restore_snapshot(initial_state_liveness->snapshot); - MC_UNSET_RAW_MEM; - } + 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(){ - - smx_process_t process; +void MC_modelcheck_liveness() +{ + smx_process_t process = NULL; mc_pair_t current_pair = NULL; - - if(xbt_fifo_size(mc_stack_liveness) == 0) - return; - - /* Get current pair */ - current_pair = (mc_pair_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), current_pair->search_cycle); - - mc_stats->visited_pairs++; - - int value; + int value, res, visited_num = -1; smx_simcall_t req = NULL; - char *req_str; - - xbt_automaton_transition_t transition_succ; - unsigned int cursor = 0; - int res; - int reached_num, visited_num; - int new_pair = 0; - + 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){ - - if(current_pair->search_cycle){ - - if((current_pair->automaton_state->type == 1) || (current_pair->automaton_state->type == 2)){ - - if((reached_num = is_reached_acceptance_pair(current_pair)) != -1){ - - XBT_INFO("Pair %d already reached (equal to pair %d) !", current_pair->num, reached_num); - - MC_SET_RAW_MEM; - xbt_fifo_shift(mc_stack_liveness); - if(dot_output != NULL) - fprintf(dot_output, "\"%d\" -> \"%d\" [%s];\n", initial_state_liveness->prev_pair, reached_num, initial_state_liveness->prev_req); - MC_UNSET_RAW_MEM; - - 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(mc_stats); - xbt_abort(); - - } + 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(); } } - if((visited_num = is_visited_pair(current_pair)) != -1){ - - MC_SET_RAW_MEM; - if(dot_output != NULL) - fprintf(dot_output, "\"%d\" -> \"%d\" [%s];\n", initial_state_liveness->prev_pair, visited_num, initial_state_liveness->prev_req); - MC_UNSET_RAW_MEM; - - - }else{ - - while((req = MC_state_get_request(current_pair->graph_state, &value)) != NULL){ - - MC_SET_RAW_MEM; - if(dot_output != NULL){ - if(initial_state_liveness->prev_pair != 0 && initial_state_liveness->prev_pair != current_pair->num){ - fprintf(dot_output, "\"%d\" -> \"%d\" [%s];\n", initial_state_liveness->prev_pair, current_pair->num, initial_state_liveness->prev_req); - xbt_free(initial_state_liveness->prev_req); - } - initial_state_liveness->prev_pair = current_pair->num; - } - 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) { - /* 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); - } + 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; + } - MC_SET_RAW_MEM; - if(dot_output != NULL){ - initial_state_liveness->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_UNSET_RAW_MEM; - - MC_state_set_executed_request(current_pair->graph_state, req, value); - mc_stats->executed_transitions++; - - /* Answer the request */ - SIMIX_simcall_pre(req, value); - - /* Wait for requests (schedules processes) */ - MC_wait_for_requests(); - - MC_SET_RAW_MEM; - prop_values = get_atomic_propositions_values(); - MC_UNSET_RAW_MEM; + 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; + + }else{ + + 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); - /* Evaluate enabled transition according to atomic propositions values */ - cursor= 0; - xbt_dynar_foreach(current_pair->automaton_state->out, cursor, transition_succ){ + /* Wait for requests (schedules processes) */ + MC_wait_for_requests(); - res = MC_automaton_evaluate_label(transition_succ->label, prop_values); + MC_SET_MC_HEAP; - if(res == 1){ // enabled transition in automaton + current_pair->requests--; + current_pair->exploration_started = 1; - if(new_pair) - MC_replay_liveness(mc_stack_liveness, 1); - - MC_SET_RAW_MEM; + /* 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(); - - /* 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)){ + 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); } - } + ); next_pair->requests = MC_state_interleave_size(next_pair->graph_state); - - if(next_pair->automaton_state->type == 1 || next_pair->automaton_state->type == 2 || current_pair->search_cycle) - next_pair->search_cycle = 1; - - xbt_fifo_unshift(mc_stack_liveness, next_pair); - - if(mc_stats->expanded_pairs%1000000 == 0) - XBT_INFO("Expanded pairs : %lu", mc_stats->expanded_pairs); - - MC_UNSET_RAW_MEM; - - new_pair = 1; - - MC_ddfs(); - - } - - } - /* Then, evaluate true transitions (always true, whatever atomic propositions values) */ - cursor = 0; - xbt_dynar_foreach(current_pair->automaton_state->out, cursor, transition_succ){ - - res = MC_automaton_evaluate_label(transition_succ->label, prop_values); - - if(res == 2){ // true transition in automaton - - if(new_pair) - MC_replay_liveness(mc_stack_liveness, 1); - - MC_SET_RAW_MEM; - - 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(); - - /* 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); - } - } - - next_pair->requests = MC_state_interleave_size(next_pair->graph_state); - - if(next_pair->automaton_state->type == 1 || next_pair->automaton_state->type == 2 || current_pair->search_cycle) + /* 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; - xbt_fifo_unshift(mc_stack_liveness, next_pair); - - if(mc_stats->expanded_pairs%1000000 == 0) - XBT_INFO("Expanded pairs : %lu", mc_stats->expanded_pairs); - - MC_UNSET_RAW_MEM; - - new_pair = 1; + /* Add new pair to the exploration stack */ + xbt_fifo_unshift(mc_stack, next_pair); - MC_ddfs(); - - } - - } - - 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{ - - mc_stats->executed_transitions++; - - XBT_DEBUG("No request to execute in this state, search evolution in Büchi Automaton."); - - if(current_pair->search_cycle){ - - if((current_pair->automaton_state->type == 1) || (current_pair->automaton_state->type == 2)){ - - if((reached_num = is_reached_acceptance_pair(current_pair)) != -1){ - - XBT_INFO("Pair %d already reached (equal to pair %d) !", current_pair->num, reached_num); - - MC_SET_RAW_MEM; - xbt_fifo_shift(mc_stack_liveness); - MC_UNSET_RAW_MEM; - - 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(mc_stats); - xbt_abort(); - - } - } - } - - if((visited_num = is_visited_pair(current_pair)) != -1){ - - XBT_DEBUG("Pair %d already visited ! (equal to pair %d)", current_pair->num, visited_num); - - }else{ + } + cursor--; + } + + MC_SET_STD_HEAP; - MC_SET_RAW_MEM; - prop_values = get_atomic_propositions_values(); - MC_UNSET_RAW_MEM; - - /* Evaluate enabled transition according to atomic propositions values */ - cursor= 0; - xbt_dynar_foreach(current_pair->automaton_state->out, cursor, transition_succ){ - - res = MC_automaton_evaluate_label(transition_succ->label, prop_values); - - if(res == 1){ // enabled transition in automaton - - if(new_pair) - MC_replay_liveness(mc_stack_liveness, 1); - - MC_SET_RAW_MEM; - - 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->requests = MC_state_interleave_size(next_pair->graph_state); - - if(next_pair->automaton_state->type == 1 || next_pair->automaton_state->type == 2 || current_pair->search_cycle) - next_pair->search_cycle = 1; - - xbt_fifo_unshift(mc_stack_liveness, next_pair); - - if(mc_stats->expanded_pairs%1000 == 0) - XBT_INFO("Expanded pairs : %lu", mc_stats->expanded_pairs); - - if(dot_output != NULL) - fprintf(dot_output, "\"%d\" -> \"%d\" [%s];\n", current_pair->num, next_pair->num, ""); - - MC_UNSET_RAW_MEM; - - new_pair = 1; - - MC_ddfs(); - - } - - } - - /* Then, evaluate true transitions (always true, whatever atomic propositions values) */ - cursor = 0; - xbt_dynar_foreach(current_pair->automaton_state->out, cursor, transition_succ){ + } /* End of visited_pair test */ - res = MC_automaton_evaluate_label(transition_succ->label, prop_values); - - if(res == 2){ // true transition in automaton - - if(new_pair) - MC_replay_liveness(mc_stack_liveness, 1); - - MC_SET_RAW_MEM; - - 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->requests = MC_state_interleave_size(next_pair->graph_state); - - if(next_pair->automaton_state->type == 1 || next_pair->automaton_state->type == 2 || current_pair->search_cycle) - next_pair->search_cycle = 1; - - xbt_fifo_unshift(mc_stack_liveness, next_pair); - - if(mc_stats->expanded_pairs%1000 == 0) - XBT_INFO("Expanded pairs : %lu", mc_stats->expanded_pairs); - - if(dot_output != NULL) - fprintf(dot_output, "\"%d\" -> \"%d\" [%s];\n", current_pair->num, next_pair->num, ""); - - MC_UNSET_RAW_MEM; - - new_pair = 1; - - MC_ddfs(); - - } + } 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{ + /* 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); } } - } - }else{ + MC_SET_STD_HEAP; + } /* End of if (current_pair->requests > 0) else ... */ - 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."); - } - - } - - if(xbt_fifo_size(mc_stack_liveness) == _sg_mc_max_depth ){ - XBT_DEBUG("Pair %d (depth = %d) shifted in stack, maximum depth reached", current_pair->num, xbt_fifo_size(mc_stack_liveness) ); - }else{ - XBT_DEBUG("Pair %d (depth = %d) shifted in stack", current_pair->num, xbt_fifo_size(mc_stack_liveness) ); - } - + } /* End of while(xbt_fifo_size(mc_stack) > 0) */ - MC_SET_RAW_MEM; - xbt_dynar_free(&prop_values); - current_pair = xbt_fifo_shift(mc_stack_liveness); - current_pair->stack_removed = 1; - if(current_pair->search_cycle){ - remove_acceptance_pair(current_pair); - }else{ - if(_sg_mc_visited == 0) - MC_pair_delete(current_pair); - else if(current_pair->visited_removed) - MC_pair_delete(current_pair); - } - MC_UNSET_RAW_MEM; - }