Goal:
    __x3 : Z  __x2 : Z  __x1 : Z
  ============================
   (let __wit := [] in
    let __varmap := VarMap.Branch (VarMap.Elt __x2) __x1 (VarMap.Elt __x3) in
    let __ff :=
      Tauto.IMPL
        (Tauto.A Tauto.isProp
           {|
             RingMicromega.Flhs := EnvRing.PEc 0;
             RingMicromega.Fop := RingMicromega.OpLt;
             RingMicromega.Frhs :=
               EnvRing.PEadd (EnvRing.PEadd (EnvRing.PEX 3) (EnvRing.PEX 1))
                 (EnvRing.PEX 2)
           |} tt) None
        (Tauto.A Tauto.isProp
           {|
             RingMicromega.Flhs := EnvRing.PEc 0;
             RingMicromega.Fop := RingMicromega.OpLt;
             RingMicromega.Frhs :=
               EnvRing.PEadd (EnvRing.PEX 1)
                 (EnvRing.PEadd (EnvRing.PEX 2) (EnvRing.PEX 3))
           |} tt) in
    0 < __x3 + __x1 + __x2 -> 0 < __x1 + (__x2 + __x3))


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 0 __varmap))