int visited(mc_state_t gs, xbt_state_t as, int search_cycle);
int reached(mc_state_t gs, xbt_state_t as);
void set_pair_reached(mc_state_t gs, xbt_state_t as);
+void MC_show_snapshot_stack(xbt_fifo_t stack);
+void MC_dump_snapshot_stack(xbt_fifo_t stack);
#endif