-mc_pairs_t new_pair(mc_snapshot_t sn, mc_state_t sg, xbt_state_t st);
-void set_pair_visited(mc_state_t gs, xbt_state_t as, int search_cycle);
-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);
-void MC_pair_delete(mc_pairs_t pair);
+mc_pair_t new_pair(mc_snapshot_t sn, mc_state_t sg, xbt_state_t st);
+
+int reached(xbt_automaton_t a, xbt_state_t st, mc_snapshot_t s);
+void set_pair_reached(xbt_automaton_t a, xbt_state_t st, mc_snapshot_t s);
+int snapshot_compare(mc_snapshot_t s1, mc_snapshot_t s2);
+void MC_show_stack_liveness_stateful(xbt_fifo_t stack);
+void MC_dump_stack_liveness_stateful(xbt_fifo_t stack);
+void MC_pair_delete(mc_pair_t pair);
+void MC_exit_liveness(void);
+mc_state_t MC_state_pair_new(void);
+
+/* **** Double-DFS stateful without visited state **** */
+
+void MC_ddfs_stateful_init(xbt_automaton_t a);
+void MC_ddfs_stateful(xbt_automaton_t a, int search_cycle, int restore);
+
+/* **** Double-DFS stateless **** */
+
+typedef struct s_mc_pair_stateless{
+ mc_state_t graph_state;
+ xbt_state_t automaton_state;
+ int requests;
+}s_mc_pair_stateless_t, *mc_pair_stateless_t;
+
+extern xbt_fifo_t mc_stack_liveness_stateless;
+
+mc_pair_stateless_t new_pair_stateless(mc_state_t sg, xbt_state_t st, int r);
+void MC_ddfs_stateless_init(xbt_automaton_t a, char *prgm);
+void MC_ddfs_stateless(xbt_automaton_t a, int search_cycle, int replay, char *prgm);
+void MC_show_stack_liveness_stateless(xbt_fifo_t stack);
+void MC_dump_stack_liveness_stateless(xbt_fifo_t stack);
+void MC_pair_stateless_delete(mc_pair_stateless_t pair);
+
+