Goal:
    __x2 : Z  __x1 : Z
  ============================
   (let __wit := [] in
    let __varmap := VarMap.Branch (VarMap.Elt __x2) __x1 VarMap.Empty in
    let __ff :=
      Tauto.IFF
        (Tauto.A Tauto.isProp
           {|
             RingMicromega.Flhs := EnvRing.PEopp (EnvRing.PEX 1);
             RingMicromega.Fop := RingMicromega.OpLe;
             RingMicromega.Frhs := EnvRing.PEX 2
           |} tt)
        (Tauto.A Tauto.isProp
           {|
             RingMicromega.Flhs := EnvRing.PEopp (EnvRing.PEX 2);
             RingMicromega.Fop := RingMicromega.OpLe;
             RingMicromega.Frhs := EnvRing.PEX 1
           |} tt) in
    - __x1 <= __x2 <-> - __x2 <= __x1)


DEBUG:Going to execute:
zchecker