Goal:
    __p1 : Prop  __x2 : Z  __x1 : Z
  ============================
   (let __wit := [] in
    let __varmap :=
      VarMap.Branch (VarMap.Branch (VarMap.Elt __x2) __x2 VarMap.Empty) __x1
        VarMap.Empty in
    let __ff :=
      Tauto.IMPL
        (Tauto.A Tauto.isProp
           {|
             RingMicromega.Flhs :=
               EnvRing.PEadd
                 (EnvRing.PEadd
                    (EnvRing.PEsub (EnvRing.PEX 1) (EnvRing.PEX 4))
                    (EnvRing.PEc 1)) (EnvRing.PEX 4);
             RingMicromega.Fop := RingMicromega.OpLe;
             RingMicromega.Frhs := EnvRing.PEX 1
           |} tt) None (Tauto.X Tauto.isProp __p1) in
    __x1 - __x2 + 1 + __x2 <= __x1 -> __p1)


DEBUG:Going to execute:
intros __wit __varmap __ff; exact
            (ZMicromega.ZTautoChecker_sound __ff __wit
               (eq_refl <: ZMicromega.ZTautoChecker __ff __wit = true)
               (VarMap.find 0 __varmap))