#ifndef _STATE_DB_H_
#define _STATE_DB_H_

typedef struct state_db {
    struct memory *memory;
    unsigned hash;
    int visit; // visiting count for repeating search
    int flag;  // CTL state
    struct state_db *left;
    struct state_db *right;
} StateNode, *StateDB;

extern int
lookup_StateDB(StateDB s, StateDB *db, StateDB *out);

extern int state_count();
extern void reset_state_count();



#endif