Goal:
    G : t  HI : invariants  n : Z  m : Z
  ============================
   (- n <= m <-> - m <= n)


DEBUG:Going to execute:
lazymatch Zify.zify_convert_to_euclidean_division_equations_flag
           with
           | true =>
               Zify.zify_internal_to_euclidean_division_equations
           | false => idtac
           end