Goal:
    __p1 : Prop  __x1 : BinNums.Z
  ============================
   (let __wit := [] in
    let __varmap := VarMap.Elt __x1 in
    let __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.OpEq;
                RingMicromega.Frhs := EnvRing.PEc BinNums.Z0
              |} tt) None (Tauto.X Tauto.isProp __p1)) in
    BinInt.Z.le BinNums.Z0 __x1
    → BinInt.Z.add __x1 (BinNums.Zpos BinNums.xH) = BinNums.Z0 → __p1)


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