Lemma mem_wd_store_init_data: forall ge a (b:block) (z:Z) m1 m2 (SID:Genv.store_init_data ge m1 b z a = Some m2), X86WD.ge_wd (id_ren m1) ge -> MemoryWD.valid_mem m1 -> MemoryWD.valid_mem m2.