fact: Definition BDDstate_OK (bs : BDDstate) := MapGet _ bs BDDzero = None /\ MapGet _ bs BDDone = None /\ (forall a : ad, in_dom _ a bs = true -> BDD_OK bs a).
imports: Bool Sumbool Arith ZArith NArith Nnat Ndec Ndigits IntMap(Allmaps) Wf_nat BDDvar_ad_nat