Goal:
    G : t  HI : invariants  s0 : VSet.t  x : V.t  H : 0 <> 0
  ============================
   (VSet.In x s0)


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