Module MemoryLemmas.
Global Notation "a # b" := (Maps.PMap.get b a) (at level 1).
Transparent Mem.store.
Transparent Mem.alloc.

Lemma val_at_alloc_2:
forall m m' lo hi nb ofs
(Halloc: Mem.alloc m lo hi = (m', nb)),
Maps.ZMap.get ofs (Maps.PMap.get nb (Mem.mem_contents m')) = Undef.