extern __thread mc_comparison_times_t mc_comp_times;
extern __thread double mc_snapshot_comparison_time;
-int snapshot_compare(void *p1, void *p2);
+int snapshot_compare(void *state1, void *state2);
int SIMIX_pre_mc_compare_snapshots(smx_simcall_t simcall, mc_snapshot_t s1, mc_snapshot_t s2);
void print_comparison_times(void);