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.
Next Obligation.
apply (proj1_sig (range_perm_storebytes (m_dry j) b ofs bytes H)).
Defined.
Next Obligation.
apply (proj2_sig (range_perm_storebytes (m_dry j) b ofs bytes H)).
Qed.

(* Transparent alloc. *)
Lemma after_alloc_contents_cohere:
forall jm lo hi m' b (H : alloc (m_dry jm) lo hi = (m', b)),
contents_cohere m'
(after_alloc lo hi b (m_phi jm) (juicy_mem_alloc_aux1 jm lo hi m' b H)).