Goal:
  
  __p1 : Prop
  __x1 : BinNums.Z
  __wit := [] : list ZMicromega.ZArithProof
  __varmap := VarMap.Elt __x1 : VarMap.t BinNums.Z
  __ff := Tauto.IMPL
            (Tauto.A Tauto.isProp
               {|
                 RingMicromega.Flhs := EnvRing.PEc BinNums.Z0;
                 RingMicromega.Fop := RingMicromega.OpLe;
                 RingMicromega.Frhs := EnvRing.PEX BinNums.xH
               |} tt) None
            (Tauto.IMPL
               (Tauto.A Tauto.isProp
                  {|
                    RingMicromega.Flhs :=
                      EnvRing.PEadd (EnvRing.PEX BinNums.xH)
                        (EnvRing.PEc (BinNums.Zpos BinNums.xH));
                    RingMicromega.Fop := RingMicromega.OpLe;
                    RingMicromega.Frhs := EnvRing.PEc BinNums.Z0
                  |} tt) None (Tauto.X Tauto.isProp __p1))
       : Tauto.BFormula (RingMicromega.Formula BinNums.Z) Tauto.isProp
  ============================
   (BinInt.Z.le BinNums.Z0 __x1
    → BinInt.Z.le (BinInt.Z.add __x1 (BinNums.Zpos BinNums.xH)) BinNums.Z0
      → __p1)


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