Goal:
    x : byte  y : byte  z : byte
  ============================
   ((to_N x < to_N y)%N -> (to_N y < to_N z)%N -> (to_N x < to_N z)%N)


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