Program Definition juicy_mem_storebytes j b ofs bytes: option juicy_mem :=
  if range_perm_dec (m_dry j) b ofs (ofs + Z_of_nat (length bytes)) Cur Writable
    then Some (storebytes_juicy_mem j _ b ofs bytes _)
    else None.

Lemma after_alloc_access_cohere: forall jm lo hi m' b (H : alloc (m_dry jm) lo hi = (m', b)), access_cohere m' (after_alloc lo hi b (m_phi jm) (juicy_mem_alloc_aux1 jm lo hi m' b H)).