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 nodes_reachable_trans : forall (bs : BDDstate) (node1 node2 node3 : ad), nodes_reachable bs node1 node2 -> nodes_reachable bs node2 node3 -> nodes_reachable bs node1 node3.