Goal:
    G : t  HI : invariants  x : Z  le : 0 <= x  H : x < 0
  ============================
   (0 = x)


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