Definition bs_of_cfg := fst cfg.Definition share_of_cfg := fst (snd cfg).Definition fl_of_cfg := fst (snd (snd cfg)).Definition cnt_of_cfg := fst (snd (snd (snd cfg))).Definition negm_of_cfg := fst (snd (snd (snd (snd cfg)))).Definition orm_of_cfg := fst (snd (snd (snd (snd (snd cfg))))).Definition um_of_cfg := snd (snd (snd (snd (snd (snd cfg))))).

Lemma node_preserved_bs_node_height_eq : forall (bs bs' : BDDstate) (node : ad), BDDstate_OK bs -> BDDstate_OK bs' -> node_preserved_bs bs bs' node -> node_OK bs node -> Neqb (bs_node_height bs' node) (bs_node_height bs node) = true.