Goal:
  
  __x1 : BinNums.Z
  __wit := [] : list ZMicromega.ZArithProof
  __varmap := VarMap.Elt __x1 : VarMap.t BinNums.Z
  __ff := Tauto.A Tauto.isProp
            {|
              RingMicromega.Flhs := EnvRing.PEX BinNums.xH;
              RingMicromega.Fop := RingMicromega.OpEq;
              RingMicromega.Frhs :=
                EnvRing.PEadd (EnvRing.PEX BinNums.xH)
                  (EnvRing.PEc BinNums.Z0)
            |} ()
       : Tauto.BFormula (RingMicromega.Formula BinNums.Z) Tauto.isProp
  ============================
   (__x1 = BinInt.Z.add __x1 BinNums.Z0)


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