+ void update_predicate_tree(func_inst_list_t * inst_list, HashTable<FuncInst *, uint64_t, uintptr_t, 4> * read_val_map);
+ bool follow_branch(Predicate ** curr_pred, FuncInst * next_inst, HashTable<FuncInst *, uint64_t, uintptr_t, 4> * read_val_map, HashTable<void *, FuncInst *, uintptr_t, 4>* loc_inst_map);
+ void print_predicate_tree();