Goal:
    __x1 : Z
  ============================
   (let __wit := [] in
    let __varmap := VarMap.Elt __x1 in
    let __ff :=
      Tauto.IMPL
        (Tauto.A Tauto.isProp
           {|
             RingMicromega.Flhs := EnvRing.PEX 1;
             RingMicromega.Fop := RingMicromega.OpLe;
             RingMicromega.Frhs := EnvRing.PEc 0
           |} tt) None
        (Tauto.A Tauto.isProp
           {|
             RingMicromega.Flhs := EnvRing.PEc 0;
             RingMicromega.Fop := RingMicromega.OpLe;
             RingMicromega.Frhs := EnvRing.PEopp (EnvRing.PEX 1)
           |} tt) in
    __x1 <= 0 -> 0 <= - __x1)


DEBUG:Going to execute:
zchecker