↑ Up

DT2H2X---1.9.5.THM-Ref.s

View TPTP
Problem
Process solution in
SystemOnTSTP
Download .tgz
%------------------------------------------------------------------------------
% File     : DT2H2X---1.9.5
% Problem  : SEU931^5 : TPTP v9.2.1. Released v4.0.0.
% Transfm  : none
% Format   : tptp:raw
% Command  : /export/starexec/sandbox2/solver/bin/run_DT2H2X /export/starexec/sandbox2/benchmark/theBenchmark.p 300

% Computer : n017.cluster.edu
% Model    : x86_64 x86_64
% CPU      : Intel(R) Xeon(R) CPU E5-2620 v4 2.10GHz
% Memory   : 8042.1875MB
% OS       : Linux 3.10.0-693.el7.x86_64
% CPULimit : 300s
% WCLimit  : 300s
% DateTime : Wed Feb 25 09:37:46 AM UTC 2026

% Result   : Theorem 1.48s 1.29s
% Output   : Refutation 1.48s
% Verified : 
% SZS Type : Refutation
%            Derivation depth      :   15
%            Number of leaves      :    2
% Syntax   : Number of formulae    :   20 (   7 unt;   0 typ;   0 def)
%            Number of atoms       :   80 (  63 equ;   0 cnn)
%            Maximal formula atoms :    6 (   4 avg)
%            Number of connectives :  154 (  18   ~;   9   |;  19   &;  92   @)
%                                         (   0 <=>;  16  =>;   0  <=;   0 <~>)
%            Maximal formula depth :    8 (   5 avg)
%            Number of types       :    1 (   0 usr)
%            Number of type conns  :    0 (   0   >;   0   *;   0   +;   0  <<)
%            Number of symbols     :    6 (   4 usr;   2 con; 0-2 aty)
%            Number of variables   :   56 (  22   ^;  20   !;  14   ?;  56   :)

% Comments : 
%------------------------------------------------------------------------------
thf(func_def_0,type,
    f: $i > $i ).

thf(func_def_1,type,
    g: $i > $i ).

thf(func_def_9,type,
    ph2: 
      !>[X0: $tType] : X0 ).

thf(f23,plain,
    $false,
    inference(subsumption_resolution,[status(thm)],[f22,f15]) ).

thf(f15,plain,
    ! [X0: $i] :
      ( ( f @ X0 )
     != X0 ),
    inference(cnf_transformation,[status(thm)],[f11]) ).

thf(f11,plain,
    ( ! [X0: $i] :
        ( ( f @ X0 )
       != X0 )
    & ( ( ^ [Y0: $i] : ( f @ ( g @ Y0 ) ) )
      = ( ^ [Y0: $i] : ( g @ ( f @ Y0 ) ) ) )
    & ! [X2: $i] :
        ( ( sK0 = X2 )
        | ( ( g @ X2 )
         != X2 ) )
    & ( sK0
      = ( g @ sK0 ) ) ),
    inference(skolemisation,[status(esa),new_symbols(skolem,[sK0])],[f9,f10]) ).

thf(f10,plain,
    ( ? [X1: $i] :
        ( ! [X2: $i] :
            ( ( X1 = X2 )
            | ( ( g @ X2 )
             != X2 ) )
        & ( ( g @ X1 )
          = X1 ) )
   => ( ! [X2: $i] :
          ( ( sK0 = X2 )
          | ( ( g @ X2 )
           != X2 ) )
      & ( sK0
        = ( g @ sK0 ) ) ) ),
    introduced(definition,[],[choice_axiom]) ).

thf(f9,plain,
    ( ! [X0: $i] :
        ( ( f @ X0 )
       != X0 )
    & ( ( ^ [Y0: $i] : ( f @ ( g @ Y0 ) ) )
      = ( ^ [Y0: $i] : ( g @ ( f @ Y0 ) ) ) )
    & ? [X1: $i] :
        ( ! [X2: $i] :
            ( ( X1 = X2 )
            | ( ( g @ X2 )
             != X2 ) )
        & ( ( g @ X1 )
          = X1 ) ) ),
    inference(rectify,[status(thm)],[f8]) ).

thf(f8,plain,
    ( ! [X2: $i] :
        ( ( f @ X2 )
       != X2 )
    & ( ( ^ [Y0: $i] : ( f @ ( g @ Y0 ) ) )
      = ( ^ [Y0: $i] : ( g @ ( f @ Y0 ) ) ) )
    & ? [X0: $i] :
        ( ! [X1: $i] :
            ( ( X0 = X1 )
            | ( ( g @ X1 )
             != X1 ) )
        & ( ( g @ X0 )
          = X0 ) ) ),
    inference(flattening,[status(thm)],[f7]) ).

thf(f7,plain,
    ( ! [X2: $i] :
        ( ( f @ X2 )
       != X2 )
    & ? [X0: $i] :
        ( ! [X1: $i] :
            ( ( X0 = X1 )
            | ( ( g @ X1 )
             != X1 ) )
        & ( ( g @ X0 )
          = X0 ) )
    & ( ( ^ [Y0: $i] : ( f @ ( g @ Y0 ) ) )
      = ( ^ [Y0: $i] : ( g @ ( f @ Y0 ) ) ) ) ),
    inference(ennf_transformation,[status(thm)],[f6]) ).

thf(f6,plain,
    ~ ( ( ( ^ [Y0: $i] : ( f @ ( g @ Y0 ) ) )
        = ( ^ [Y0: $i] : ( g @ ( f @ Y0 ) ) ) )
     => ( ? [X0: $i] :
            ( ( ( g @ X0 )
              = X0 )
            & ! [X1: $i] :
                ( ( ( g @ X1 )
                  = X1 )
               => ( X0 = X1 ) ) )
       => ? [X2: $i] :
            ( ( f @ X2 )
            = X2 ) ) ),
    inference(rectify,[status(thm)],[f5]) ).

thf(f5,plain,
    ~ ( ( ( ^ [Y0: $i] : ( f @ ( g @ Y0 ) ) )
        = ( ^ [Y0: $i] : ( g @ ( f @ Y0 ) ) ) )
     => ( ? [X2: $i] :
            ( ( ( g @ X2 )
              = X2 )
            & ! [X3: $i] :
                ( ( ( g @ X3 )
                  = X3 )
               => ( X2 = X3 ) ) )
       => ? [X4: $i] :
            ( ( f @ X4 )
            = X4 ) ) ),
    inference(fool_elimination,[status(thm)],[f4]) ).

thf(f4,plain,
    ~ ( ( ( ^ [X0: $i] : ( g @ ( f @ X0 ) ) )
        = ( ^ [X1: $i] : ( f @ ( g @ X1 ) ) ) )
     => ( ? [X2: $i] :
            ( ( ( g @ X2 )
              = X2 )
            & ! [X3: $i] :
                ( ( ( g @ X3 )
                  = X3 )
               => ( X2 = X3 ) ) )
       => ? [X4: $i] :
            ( ( f @ X4 )
            = X4 ) ) ),
    inference(rectify,[status(thm)],[f2]) ).

thf(f2,negated_conjecture,
    ~ ( ( ( ^ [X0: $i] : ( g @ ( f @ X0 ) ) )
        = ( ^ [X0: $i] : ( f @ ( g @ X0 ) ) ) )
     => ( ? [X0: $i] :
            ( ( ( g @ X0 )
              = X0 )
            & ! [X1: $i] :
                ( ( ( g @ X1 )
                  = X1 )
               => ( X0 = X1 ) ) )
       => ? [X2: $i] :
            ( ( f @ X2 )
            = X2 ) ) ),
    inference(negated_conjecture,[status(cth)],[f1]) ).

thf(f1,conjecture,
    ( ( ( ^ [X0: $i] : ( g @ ( f @ X0 ) ) )
      = ( ^ [X0: $i] : ( f @ ( g @ X0 ) ) ) )
   => ( ? [X0: $i] :
          ( ( ( g @ X0 )
            = X0 )
          & ! [X1: $i] :
              ( ( ( g @ X1 )
                = X1 )
             => ( X0 = X1 ) ) )
     => ? [X2: $i] :
          ( ( f @ X2 )
          = X2 ) ) ),
    file('/export/starexec/sandbox2/tmp/tmp.ydUpwjKXv2/DTF2THF_12135.p',cTHM171_pme) ).

thf(f22,plain,
    ( sK0
    = ( f @ sK0 ) ),
    inference(trivial_inequality_removal,[status(thm)],[f20]) ).

thf(f20,plain,
    ( ( ( f @ sK0 )
     != ( f @ sK0 ) )
    | ( sK0
      = ( f @ sK0 ) ) ),
    inference(superposition,[status(thm)],[f19,f12]) ).

thf(f12,plain,
    ( sK0
    = ( g @ sK0 ) ),
    inference(cnf_transformation,[status(thm)],[f11]) ).

thf(f19,plain,
    ! [X0: $i] :
      ( ( ( f @ ( g @ X0 ) )
       != ( f @ X0 ) )
      | ( ( f @ X0 )
        = sK0 ) ),
    inference(superposition,[status(thm)],[f13,f18]) ).

thf(f18,plain,
    ! [X1: $i] :
      ( ( g @ ( f @ X1 ) )
      = ( f @ ( g @ X1 ) ) ),
    inference(beta_eta_normalization,[status(thm)],[f17]) ).

thf(f17,plain,
    ! [X1: $i] :
      ( ( ^ [Y0: $i] : ( g @ ( f @ Y0 ) )
        @ X1 )
      = ( ^ [Y0: $i] : ( f @ ( g @ Y0 ) )
        @ X1 ) ),
    inference(argument_congruence,[status(thm)],[f14]) ).

thf(f14,plain,
    ( ( ^ [Y0: $i] : ( f @ ( g @ Y0 ) ) )
    = ( ^ [Y0: $i] : ( g @ ( f @ Y0 ) ) ) ),
    inference(cnf_transformation,[status(thm)],[f11]) ).

thf(f13,plain,
    ! [X2: $i] :
      ( ( ( g @ X2 )
       != X2 )
      | ( sK0 = X2 ) ),
    inference(cnf_transformation,[status(thm)],[f11]) ).

%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.00/0.12  % Problem  : SEU931^5 : TPTP v9.2.1. Released v4.0.0.
% 0.12/0.13  % Command  : /export/starexec/sandbox2/solver/bin/run_DT2H2X /export/starexec/sandbox2/benchmark/theBenchmark.p 300
% 0.16/0.33  % Computer : n017.cluster.edu
% 0.16/0.33  % Model    : x86_64 x86_64
% 0.16/0.33  % CPU      : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz
% 0.16/0.33  % Memory   : 8042.1875MB
% 0.16/0.33  % OS       : Linux 3.10.0-693.el7.x86_64
% 0.16/0.33  % CPULimit : 300
% 0.16/0.33  % WCLimit  : 300
% 0.16/0.33  % DateTime : Tue Feb 24 12:35:56 EST 2026
% 0.16/0.34  % CPUTime  : 
% 0.16/0.34  Running /export/starexec/sandbox2/solver/bin/run_DT2H2X /export/starexec/sandbox2/benchmark/theBenchmark.p 300
% 0.18/0.45  ---- Original DTF file ---
% 0.18/0.45  thf(spec,logic,$$dhol).
% 0.18/0.45  %------------------------------------------------------------------------------
% 0.18/0.45  % File     : SEU931^5 : TPTP v9.2.1. Released v4.0.0.
% 0.18/0.45  % Domain   : Set Theory (Functions)
% 0.18/0.45  % Problem  : TPS problem THM171
% 0.18/0.45  % Version  : Especial.
% 0.18/0.45  % English  : If g commutes with f, and g has a unique fixed point, then f has
% 0.18/0.45  %            a fixed point.
% 0.18/0.45  
% 0.18/0.45  % Refs     : [Bro09] Brown (2009), Email to Geoff Sutcliffe
% 0.18/0.45  % Source   : [Bro09]
% 0.18/0.45  % Names    : tps_0259 [Bro09]
% 0.18/0.45  %          : THM171 [TPS]
% 0.18/0.45  
% 0.18/0.45  % Status   : Theorem
% 0.18/0.45  % Rating   : 0.00 v8.2.0, 0.08 v8.1.0, 0.00 v7.4.0, 0.11 v7.2.0, 0.00 v7.1.0, 0.12 v7.0.0, 0.14 v6.4.0, 0.17 v6.3.0, 0.20 v6.2.0, 0.14 v5.5.0, 0.17 v5.4.0, 0.20 v5.3.0, 0.40 v5.2.0, 0.20 v4.1.0, 0.00 v4.0.1, 0.33 v4.0.0
% 0.18/0.45  % Syntax   : Number of formulae    :    3 (   0 unt;   2 typ;   0 def)
% 0.18/0.45  %            Number of atoms       :    5 (   5 equ;   0 cnn)
% 0.18/0.45  %            Maximal formula atoms :    5 (   5 avg)
% 0.18/0.45  %            Number of connectives :   11 (   0   ~;   0   |;   1   &;   7   @)
% 0.18/0.45  %                                         (   0 <=>;   3  =>;   0  <=;   0 <~>)
% 0.18/0.45  %            Maximal formula depth :    7 (   7 avg)
% 0.18/0.45  %            Number of types       :    1 (   0 usr)
% 0.18/0.45  %            Number of type conns  :    2 (   2   >;   0   *;   0   +;   0  <<)
% 0.18/0.45  %            Number of symbols     :    3 (   2 usr;   0 con; 1-2 aty)
% 0.18/0.45  %            Number of variables   :    5 (   2   ^;   1   !;   2   ?;   5   :)
% 0.18/0.45  % SPC      : TH0_THM_EQU_NAR
% 0.18/0.45  
% 0.18/0.45  % Comments : This problem is from the TPS library. Copyright (c) 2009 The TPS
% 0.18/0.45  %            project in the Department of Mathematical Sciences at Carnegie
% 0.18/0.45  %            Mellon University. Distributed under the Creative Commons copyleft
% 0.18/0.45  %            license: http://creativecommons.org/licenses/by-sa/3.0/
% 0.18/0.45  %          : Polymorphic definitions expanded.
% 0.18/0.45  %------------------------------------------------------------------------------
% 0.18/0.45  thf(f,type,
% 0.18/0.45      f: $i > $i ).
% 0.18/0.45  
% 0.18/0.45  thf(g,type,
% 0.18/0.45      g: $i > $i ).
% 0.18/0.45  
% 0.18/0.45  thf(cTHM171_pme,conjecture,
% 0.18/0.45      ( ( ( ^ [Xx: $i] : ( f @ ( g @ Xx ) ) )
% 0.18/0.45        = ( ^ [Xx: $i] : ( g @ ( f @ Xx ) ) ) )
% 0.18/0.45     => ( ? [Xx: $i] :
% 0.18/0.45            ( ( ( g @ Xx )
% 0.18/0.45              = Xx )
% 0.18/0.45            & ! [Xz: $i] :
% 0.18/0.45                ( ( ( g @ Xz )
% 0.18/0.45                  = Xz )
% 0.18/0.45               => ( Xz = Xx ) ) )
% 0.18/0.45       => ? [Xy: $i] :
% 0.18/0.45            ( ( f @ Xy )
% 0.18/0.45            = Xy ) ) ) ).
% 0.18/0.45  
% 0.18/0.45  %------------------------------------------------------------------------------
% 0.18/0.45  ------------------------
% 1.48/1.27  ---- Embedded in THF ---
% 1.48/1.27  %%% This output was generated by embedproblem, version 1.9.5 (library version 1.9).
% 1.48/1.27  %%% Generated on Tue Feb 24 12:35:57 EST 2026
% 1.48/1.27  %%% using '$$dhol' embedding, version 1.3.0.
% 1.48/1.27  %%% Logic specification used:
% 1.48/1.27  %%% thf(spec, logic, $$dhol).
% 1.48/1.27  
% 1.48/1.27  % SZS output start ListOfTHF for /export/starexec/sandbox2/tmp/tmp.ydUpwjKXv2/DTF2DTF12135.p
% See solution above
% 1.48/1.27  ------------------------
% 1.48/1.28  ---- Cleaned THF ---
% 1.48/1.28  thf(f,type,
% 1.48/1.28      f: $i > $i ).
% 1.48/1.28  
% 1.48/1.28  thf(g,type,
% 1.48/1.28      g: $i > $i ).
% 1.48/1.28  
% 1.48/1.28  thf(cTHM171_pme,conjecture,
% 1.48/1.28      ( ( ( ^ [Xx: $i] : ( f @ ( g @ Xx ) ) )
% 1.48/1.28        = ( ^ [Xx: $i] : ( g @ ( f @ Xx ) ) ) )
% 1.48/1.28     => ( ? [Xx: $i] :
% 1.48/1.28            ( ( ( g @ Xx )
% 1.48/1.28              = Xx )
% 1.48/1.28            & ! [Xz: $i] :
% 1.48/1.28                ( ( ( g @ Xz )
% 1.48/1.28                  = Xz )
% 1.48/1.28               => ( Xz = Xx ) ) )
% 1.48/1.28       => ? [Xy: $i] :
% 1.48/1.28            ( ( f @ Xy )
% 1.48/1.28            = Xy ) ) ) ).
% 1.48/1.28  ------------------------
% 1.48/1.29  % (12308)lrs+1002_1:8_bd=off:fd=off:hud=10:tnu=1:i=183:si=on:rtra=on_0 on DTF2THF_12135 for (3000ds/183Mi)
% 1.48/1.29  % (12308)First to succeed.
% 1.48/1.29  % (12308)Refutation found. Thanks to Tanya!
% 1.48/1.29  % SZS status Theorem for DTF2THF_12135
% 1.48/1.29  % SZS output start Proof for DTF2THF_12135
% 1.48/1.29  thf(func_def_0, type, f: $i > $i).
% 1.48/1.29  thf(func_def_1, type, g: $i > $i).
% 1.48/1.29  thf(func_def_9, type, ph2: !>[X0: $tType]:(X0)).
% 1.48/1.29  thf(f23,plain,(
% 1.48/1.29    $false),
% 1.48/1.29    inference(subsumption_resolution,[status(thm)],[f22,f15])).
% 1.48/1.29  thf(f15,plain,(
% 1.48/1.29    ( ! [X0 : $i] : (((f @ X0) != X0)) )),
% 1.48/1.29    inference(cnf_transformation,[status(thm)],[f11])).
% 1.48/1.29  thf(f11,plain,(
% 1.48/1.29    ! [X0 : $i] : ((f @ X0) != X0) & ((^[Y0 : $i]: (f @ (g @ Y0))) = (^[Y0 : $i]: (g @ (f @ Y0)))) & (! [X2 : $i] : ((sK0 = X2) | ((g @ X2) != X2)) & (sK0 = (g @ sK0)))),
% 1.48/1.29    inference(skolemisation,[status(esa),new_symbols(skolem,[sK0])],[f9,f10])).
% 1.48/1.29  thf(f10,plain,(
% 1.48/1.29    ? [X1 : $i] : (! [X2 : $i] : ((X1 = X2) | ((g @ X2) != X2)) & ((g @ X1) = X1)) => (! [X2 : $i] : ((sK0 = X2) | ((g @ X2) != X2)) & (sK0 = (g @ sK0)))),
% 1.48/1.29    introduced(definition,[],[choice_axiom])).
% 1.48/1.29  thf(f9,plain,(
% 1.48/1.29    ! [X0 : $i] : ((f @ X0) != X0) & ((^[Y0 : $i]: (f @ (g @ Y0))) = (^[Y0 : $i]: (g @ (f @ Y0)))) & ? [X1 : $i] : (! [X2 : $i] : ((X1 = X2) | ((g @ X2) != X2)) & ((g @ X1) = X1))),
% 1.48/1.29    inference(rectify,[status(thm)],[f8])).
% 1.48/1.29  thf(f8,plain,(
% 1.48/1.29    ! [X2 : $i] : ((f @ X2) != X2) & ((^[Y0 : $i]: (f @ (g @ Y0))) = (^[Y0 : $i]: (g @ (f @ Y0)))) & ? [X0 : $i] : (! [X1 : $i] : ((X0 = X1) | ((g @ X1) != X1)) & ((g @ X0) = X0))),
% 1.48/1.29    inference(flattening,[status(thm)],[f7])).
% 1.48/1.29  thf(f7,plain,(
% 1.48/1.29    (! [X2 : $i] : ((f @ X2) != X2) & ? [X0 : $i] : (! [X1 : $i] : ((X0 = X1) | ((g @ X1) != X1)) & ((g @ X0) = X0))) & ((^[Y0 : $i]: (f @ (g @ Y0))) = (^[Y0 : $i]: (g @ (f @ Y0))))),
% 1.48/1.29    inference(ennf_transformation,[status(thm)],[f6])).
% 1.48/1.29  thf(f6,plain,(
% 1.48/1.29    ~(((^[Y0 : $i]: (f @ (g @ Y0))) = (^[Y0 : $i]: (g @ (f @ Y0)))) => (? [X0 : $i] : (((g @ X0) = X0) & ! [X1 : $i] : (((g @ X1) = X1) => (X0 = X1))) => ? [X2 : $i] : ((f @ X2) = X2)))),
% 1.48/1.29    inference(rectify,[status(thm)],[f5])).
% 1.48/1.29  thf(f5,plain,(
% 1.48/1.29    ~(((^[Y0 : $i]: (f @ (g @ Y0))) = (^[Y0 : $i]: (g @ (f @ Y0)))) => (? [X2 : $i] : (((g @ X2) = X2) & ! [X3 : $i] : (((g @ X3) = X3) => (X2 = X3))) => ? [X4 : $i] : ((f @ X4) = X4)))),
% 1.48/1.29    inference(fool_elimination,[status(thm)],[f4])).
% 1.48/1.29  thf(f4,plain,(
% 1.48/1.29    ~(((^[X0 : $i] : (g @ (f @ X0))) = (^[X1 : $i] : (f @ (g @ X1)))) => (? [X2 : $i] : (((g @ X2) = X2) & ! [X3 : $i] : (((g @ X3) = X3) => (X2 = X3))) => ? [X4 : $i] : ((f @ X4) = X4)))),
% 1.48/1.29    inference(rectify,[status(thm)],[f2])).
% 1.48/1.29  thf(f2,negated_conjecture,(
% 1.48/1.29    ~(((^[X0 : $i] : (g @ (f @ X0))) = (^[X0 : $i] : (f @ (g @ X0)))) => (? [X0 : $i] : (((g @ X0) = X0) & ! [X1 : $i] : (((g @ X1) = X1) => (X0 = X1))) => ? [X2 : $i] : ((f @ X2) = X2)))),
% 1.48/1.29    inference(negated_conjecture,[status(cth)],[f1])).
% 1.48/1.29  thf(f1,conjecture,(
% 1.48/1.29    ((^[X0 : $i] : (g @ (f @ X0))) = (^[X0 : $i] : (f @ (g @ X0)))) => (? [X0 : $i] : (((g @ X0) = X0) & ! [X1 : $i] : (((g @ X1) = X1) => (X0 = X1))) => ? [X2 : $i] : ((f @ X2) = X2))),
% 1.48/1.29    file('/export/starexec/sandbox2/tmp/tmp.ydUpwjKXv2/DTF2THF_12135.p',cTHM171_pme)).
% 1.48/1.29  thf(f22,plain,(
% 1.48/1.29    (sK0 = (f @ sK0))),
% 1.48/1.29    inference(trivial_inequality_removal,[status(thm)],[f20])).
% 1.48/1.29  thf(f20,plain,(
% 1.48/1.29    ((f @ sK0) != (f @ sK0)) | (sK0 = (f @ sK0))),
% 1.48/1.29    inference(superposition,[status(thm)],[f19,f12])).
% 1.48/1.29  thf(f12,plain,(
% 1.48/1.29    (sK0 = (g @ sK0))),
% 1.48/1.29    inference(cnf_transformation,[status(thm)],[f11])).
% 1.48/1.29  thf(f19,plain,(
% 1.48/1.29    ( ! [X0 : $i] : (((f @ (g @ X0)) != (f @ X0)) | ((f @ X0) = sK0)) )),
% 1.48/1.29    inference(superposition,[status(thm)],[f13,f18])).
% 1.48/1.29  thf(f18,plain,(
% 1.48/1.29    ( ! [X1 : $i] : (((g @ (f @ X1)) = (f @ (g @ X1)))) )),
% 1.48/1.29    inference(beta_eta_normalization,[status(thm)],[f17])).
% 1.48/1.29  thf(f17,plain,(
% 1.48/1.29    ( ! [X1 : $i] : ((((^[Y0 : $i]: (g @ (f @ Y0))) @ X1) = ((^[Y0 : $i]: (f @ (g @ Y0))) @ X1))) )),
% 1.48/1.29    inference(argument_congruence,[status(thm)],[f14])).
% 1.48/1.29  thf(f14,plain,(
% 1.48/1.29    ((^[Y0 : $i]: (f @ (g @ Y0))) = (^[Y0 : $i]: (g @ (f @ Y0))))),
% 1.48/1.29    inference(cnf_transformation,[status(thm)],[f11])).
% 1.48/1.29  thf(f13,plain,(
% 1.48/1.29    ( ! [X2 : $i] : (((g @ X2) != X2) | (sK0 = X2)) )),
% 1.48/1.29    inference(cnf_transformation,[status(thm)],[f11])).
% 1.48/1.29  % SZS output end Proof for DTF2THF_12135
% 1.48/1.29  % (12308)------------------------------
% 1.48/1.29  % (12308)Version: Vampire 4.8 (commit 7b44b1c2f on 2025-07-15 09:50:17 +0100)
% 1.48/1.29  % (12308)Termination reason: Refutation
% 1.48/1.29  
% 1.48/1.29  % (12308)Memory used [KB]: 5500
% 1.48/1.29  % (12308)Time elapsed: 0.003 s
% 1.48/1.29  % (12308)Instructions burned: 1 (million)
% 1.48/1.29  % (12308)------------------------------
% 1.48/1.29  % (12308)------------------------------
% 1.48/1.29  % (12307)Success in time 0.013 s
%------------------------------------------------------------------------------