Remark inval_after_outside:
forall i lo hi c, i < lo \/ i > hi -> (inval_after lo hi c)##i = c##i.
Remark inval_after_contents:
forall chunk av i lo hi c,
(inval_after lo hi c)##i = Some (ACval chunk av) ->
c##i = Some (ACval chunk av) /\ (i < lo \/ i > hi).
Remark inval_before_outside:
forall i hi lo c, i < lo \/ i >= hi -> (inval_before hi lo c)##i = c##i.
Remark inval_before_contents_1:
forall i chunk av lo hi c,
lo <= i < hi -> (inval_before hi lo c)##i = Some(ACval chunk av) ->
c##i = Some(ACval chunk av) /\ i + size_chunk chunk <= hi.

Lemma ablock_storebytes_sound:
forall m b ofs bytes m' p ab sz,
Mem.storebytes m b ofs bytes = Some m' ->
length bytes = nat_of_Z sz ->
(forall b' ofs' q i, In (Fragment (Vptr b' ofs') q i) bytes -> pmatch b' ofs' p) ->
bmatch m b ab ->
bmatch m' b (ablock_storebytes ab p ofs sz).