Goal:
    n : Z  m : Z  l : list Z  H : m = n
  ============================
   (n <= m)


DEBUG:Going to execute:
intros; Zify.zify_pre_hook; zify_elim_let; zify_op;
            Zify.zify_iter_specs; Zify.zify_to_euclidean_division_equations;
            Zify.zify_post_hook