fact: Definition my_inb (P : stack bool) := (list_in_decb ((prod_eqb (list_eqb Bool.eqb) (list_eqb Bool.eqb))) P).
imports: Undecidability.Synthetic(Definitions EnumerabilityFacts ListEnumerabilityFacts) Lia Undecidability.L(LProd LBool LNat LOptions) Undecidability.L.Datatypes.List(List_basics List_eqb List_extra List_nat) Undecidability(PCP)