fact: Definition ZERO_codes (X: counter) (offset: nat) : list (nat -> list mm_instr) := DEC X (offset) :: [].
imports: Undecidability(MinskyMachines.MM MinskyMachines.MMA) Undecidability.Shared.Libs.DLW(Vec.pos Vec.vec Code.sss) PeanoNat List Lia Wf_nat ssreflect ssrbool ssrfun