+ void infer_predicates(FuncInst * next_inst, ModelAction * next_act, HashTable<void *, ModelAction *, uintptr_t, 0> * loc_act_map, SnapVector<struct half_pred_expr *> * half_pred_expressions);
+ void generate_predicates(Predicate ** curr_pred, FuncInst * next_inst, SnapVector<struct half_pred_expr *> * half_pred_expressions);
+ bool amend_predicate_expr(Predicate ** curr_pred, FuncInst * next_inst, ModelAction * next_act);
+
+ /* Store action_lists when calls to update_tree are deferred */
+ ModelList<action_list_t *> action_list_buffer;
+
+ /* read_locations: set of locations read by this FuncNode
+ * val_loc_map: keep track of locations that have the same values written to;
+ * loc_may_equal_map: look up locations that may share the same value as key;
+ * deduced from val_loc_map; */
+ loc_set_t * read_locations;
+ HashTable<uint64_t, loc_set_t *, uint64_t, 0> * val_loc_map;
+ HashTable<void *, loc_set_t *, uintptr_t, 0> * loc_may_equal_map;
+ // value_set_t * values_may_read_from;
+
+ /* Run-time position in the predicate tree for each thread */
+ ModelVector<Predicate *> predicate_tree_position;