Goal:
  
  __x1 : BinNums.Z
  __wit := [] : list ZMicromega.ZArithProof
  __varmap := VarMap.Elt __x1 : VarMap.t BinNums.Z
  __ff := Tauto.A Tauto.isProp
            {|
              RingMicromega.Flhs :=
                EnvRing.PEadd (EnvRing.PEX BinNums.xH)
                  (EnvRing.PEc (BinNums.Zpos BinNums.xH));
              RingMicromega.Fop := RingMicromega.OpEq;
              RingMicromega.Frhs :=
                EnvRing.PEadd (EnvRing.PEX BinNums.xH)
                  (EnvRing.PEc (BinNums.Zpos BinNums.xH))
            |} tt
       : Tauto.BFormula (RingMicromega.Formula BinNums.Z) Tauto.isProp
  ============================
   (BinInt.Z.add __x1 (BinNums.Zpos BinNums.xH) =
    BinInt.Z.add __x1 (BinNums.Zpos BinNums.xH))


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