Definition EmptyEffect: Values.block -> Z -> bool := fun b z => false.

(* Specifications: *)
Lemma EmptyEffect_alloc: forall m lo hi m' b (ALLOC: Mem.alloc m lo hi = (m', b)), Mem.unchanged_on (fun b ofs => EmptyEffect b ofs = false) m m'.
Lemma EmptyEffect_alloc: forall m lo hi m' b (ALLOC: Mem.alloc m lo hi = (m', b)), Mem.unchanged_on (fun b ofs => EmptyEffect b ofs = false) m m'.