Goal:
    __x2 : BinNums.Z  __x1 : BinNums.Z
  ============================
   (let __wit :=
      [ZMicromega.RatProof
         (RingMicromega.PsatzAdd
            (RingMicromega.PsatzMulC (EnvRing.Pc (BinNums.Zneg BinNums.xH))
               (RingMicromega.PsatzIn BinNums.Z 1))
            (RingMicromega.PsatzIn BinNums.Z 0)) ZMicromega.DoneProof] in
    let __varmap := VarMap.Branch (VarMap.Elt __x2) __x1 VarMap.Empty in
    let __ff :=
      Tauto.IMPL
        (Tauto.A Tauto.isProp
           {|
             RingMicromega.Flhs := EnvRing.PEX BinNums.xH;
             RingMicromega.Fop := RingMicromega.OpEq;
             RingMicromega.Frhs := EnvRing.PEX (BinNums.xO BinNums.xH)
           |} tt) None
        (Tauto.A Tauto.isProp
           {|
             RingMicromega.Flhs := EnvRing.PEX BinNums.xH;
             RingMicromega.Fop := RingMicromega.OpEq;
             RingMicromega.Frhs := EnvRing.PEX (BinNums.xO BinNums.xH)
           |} tt) in
    __x1 = __x2 → __x1 = __x2)


DEBUG:Going to execute:
intros __wit __varmap __ff; exact
            (ZMicromega.ZTautoChecker_sound __ff __wit
               (eq_refl <: ZMicromega.ZTautoChecker __ff __wit = true)
               (VarMap.find BinNums.Z0 __varmap))