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_loadbytes_sound:
forall m b ab b' ofs' q i n ofs bytes,
Mem.loadbytes m b ofs n = Some bytes ->
bmatch m b ab ->
In (Fragment (Vptr b' ofs') q i) bytes ->
pmatch b' ofs' (ablock_loadbytes ab).