(** ** Properties of [alloc]. *)
(** The identifier of the freshly allocated block is the next block of the initial memory state. *)

(* Specifications: *)
Axiom alloc_result:
forall m1 lo hi m2 b, alloc m1 lo hi = (m2, b) ->
b = nextblock m1.
Axiom alloc_result:
forall m1 lo hi m2 b, alloc m1 lo hi = (m2, b) ->
b = nextblock m1.