(** ** Properties related to [loadbytes] *)

Theorem loadbytes_concat:
forall m b ofs n1 n2 bytes1 bytes2,
loadbytes m b ofs n1 = Some bytes1 ->
loadbytes m b (ofs + n1) n2 = Some bytes2 ->
n1 >= 0 -> n2 >= 0 ->
loadbytes m b ofs (n1 + n2) = Some(bytes1 ++ bytes2).