%------------------------------------------------------------------------------
% File : DT2H2X---1.9.5
% Problem : SET009^5 : 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 : n028.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 09:30:54 AM UTC 2026
% Result : Theorem 1.46s 1.27s
% Output : Refutation 1.46s
% Verified :
% SZS Type : Refutation
% Derivation depth : 12
% Number of leaves : 3
% Syntax : Number of formulae : 19 ( 5 unt; 0 typ; 0 def)
% Number of atoms : 163 ( 66 equ; 0 cnn)
% Maximal formula atoms : 12 ( 8 avg)
% Number of connectives : 191 ( 42 ~; 17 |; 32 &; 83 @)
% ( 0 <=>; 17 =>; 0 <=; 0 <~>)
% Maximal formula depth : 11 ( 6 avg)
% Number of types : 2 ( 1 usr)
% Number of type conns : 27 ( 27 >; 0 *; 0 +; 0 <<)
% Number of symbols : 7 ( 4 usr; 3 con; 0-2 aty)
% Number of variables : 50 ( 0 ^; 32 !; 18 ?; 50 :)
% Comments :
%------------------------------------------------------------------------------
thf(type_def_5,type,
a: $tType ).
thf(func_def_0,type,
a: $tType ).
thf(func_def_4,type,
sK0: a > $o ).
thf(func_def_5,type,
sK1: a > $o ).
thf(func_def_6,type,
sK2: a > $o ).
thf(func_def_7,type,
sK3: a ).
thf(f20,plain,
$false,
inference(subsumption_resolution,[status(thm)],[f19,f17]) ).
thf(f17,plain,
( ( sK0 @ sK3 )
= $true ),
inference(subsumption_resolution,[status(thm)],[f14,f15]) ).
thf(f15,plain,
( $true
= ( sK1 @ sK3 ) ),
inference(cnf_transformation,[status(thm)],[f12]) ).
thf(f12,plain,
( ! [X3: a] :
( ( $true
= ( sK2 @ X3 ) )
| ( $true
!= ( sK0 @ X3 ) ) )
& ( $true
= ( sK1 @ sK3 ) )
& ( ( $true
!= ( sK1 @ sK3 ) )
| ( ( sK0 @ sK3 )
= $true ) )
& ( $true
!= ( sK2 @ sK3 ) ) ),
inference(skolemisation,[status(esa),new_symbols(skolem,[sK0,sK1,sK2,sK3])],[f9,f11,f10]) ).
thf(f10,plain,
( ? [X0: a > $o,X1: a > $o,X2: a > $o] :
( ! [X3: a] :
( ( ( X2 @ X3 )
= $true )
| ( ( X0 @ X3 )
!= $true ) )
& ? [X4: a] :
( ( ( X1 @ X4 )
= $true )
& ( ( ( X1 @ X4 )
!= $true )
| ( $true
= ( X0 @ X4 ) ) )
& ( $true
!= ( X2 @ X4 ) ) ) )
=> ( ! [X3: a] :
( ( $true
= ( sK2 @ X3 ) )
| ( $true
!= ( sK0 @ X3 ) ) )
& ? [X4: a] :
( ( ( sK1 @ X4 )
= $true )
& ( ( ( sK1 @ X4 )
!= $true )
| ( ( sK0 @ X4 )
= $true ) )
& ( $true
!= ( sK2 @ X4 ) ) ) ) ),
introduced(definition,[],[choice_axiom]) ).
thf(f11,plain,
( ? [X4: a] :
( ( ( sK1 @ X4 )
= $true )
& ( ( ( sK1 @ X4 )
!= $true )
| ( ( sK0 @ X4 )
= $true ) )
& ( $true
!= ( sK2 @ X4 ) ) )
=> ( ( $true
= ( sK1 @ sK3 ) )
& ( ( $true
!= ( sK1 @ sK3 ) )
| ( ( sK0 @ sK3 )
= $true ) )
& ( $true
!= ( sK2 @ sK3 ) ) ) ),
introduced(definition,[],[choice_axiom]) ).
thf(f9,plain,
? [X0: a > $o,X1: a > $o,X2: a > $o] :
( ! [X3: a] :
( ( ( X2 @ X3 )
= $true )
| ( ( X0 @ X3 )
!= $true ) )
& ? [X4: a] :
( ( ( X1 @ X4 )
= $true )
& ( ( ( X1 @ X4 )
!= $true )
| ( $true
= ( X0 @ X4 ) ) )
& ( $true
!= ( X2 @ X4 ) ) ) ),
inference(rectify,[status(thm)],[f8]) ).
thf(f8,plain,
? [X2: a > $o,X1: a > $o,X0: a > $o] :
( ! [X3: a] :
( ( ( X0 @ X3 )
= $true )
| ( ( X2 @ X3 )
!= $true ) )
& ? [X4: a] :
( ( ( X1 @ X4 )
= $true )
& ( ( ( X1 @ X4 )
!= $true )
| ( $true
= ( X2 @ X4 ) ) )
& ( $true
!= ( X0 @ X4 ) ) ) ),
inference(flattening,[status(thm)],[f7]) ).
thf(f7,plain,
? [X2: a > $o,X1: a > $o,X0: a > $o] :
( ? [X4: a] :
( ( ( ( X1 @ X4 )
!= $true )
| ( $true
= ( X2 @ X4 ) ) )
& ( $true
!= ( X0 @ X4 ) )
& ( ( X1 @ X4 )
= $true ) )
& ! [X3: a] :
( ( ( X0 @ X3 )
= $true )
| ( ( X2 @ X3 )
!= $true ) ) ),
inference(ennf_transformation,[status(thm)],[f6]) ).
thf(f6,plain,
~ ! [X2: a > $o,X1: a > $o,X0: a > $o] :
( ! [X3: a] :
( ( ( X2 @ X3 )
= $true )
=> ( ( X0 @ X3 )
= $true ) )
=> ! [X4: a] :
( ( ( $true
!= ( X0 @ X4 ) )
& ( ( X1 @ X4 )
= $true ) )
=> ( ( $true
!= ( X2 @ X4 ) )
& ( ( X1 @ X4 )
= $true ) ) ) ),
inference(flattening,[status(thm)],[f5]) ).
thf(f5,plain,
~ ! [X0: a > $o,X1: a > $o,X2: a > $o] :
( ! [X3: a] :
( ( ( X2 @ X3 )
= $true )
=> ( ( X0 @ X3 )
= $true ) )
=> ! [X4: a] :
( ( ( ( X1 @ X4 )
= $true )
& ( $true
!= ( X0 @ X4 ) ) )
=> ( ( $true
!= ( X2 @ X4 ) )
& ( ( X1 @ X4 )
= $true ) ) ) ),
inference(fool_elimination,[status(thm)],[f4]) ).
thf(f4,plain,
~ ! [X0: a > $o,X1: a > $o,X2: a > $o] :
( ! [X3: a] :
( ( X2 @ X3 )
=> ( X0 @ X3 ) )
=> ! [X4: a] :
( ( ( X1 @ X4 )
& ~ ( X0 @ X4 ) )
=> ( ~ ( X2 @ X4 )
& ( X1 @ X4 ) ) ) ),
inference(rectify,[status(thm)],[f2]) ).
thf(f2,negated_conjecture,
~ ! [X1: a > $o,X2: a > $o,X0: a > $o] :
( ! [X3: a] :
( ( X0 @ X3 )
=> ( X1 @ X3 ) )
=> ! [X3: a] :
( ( ( X2 @ X3 )
& ~ ( X1 @ X3 ) )
=> ( ~ ( X0 @ X3 )
& ( X2 @ X3 ) ) ) ),
inference(negated_conjecture,[status(cth)],[f1]) ).
thf(f1,conjecture,
! [X1: a > $o,X2: a > $o,X0: a > $o] :
( ! [X3: a] :
( ( X0 @ X3 )
=> ( X1 @ X3 ) )
=> ! [X3: a] :
( ( ( X2 @ X3 )
& ~ ( X1 @ X3 ) )
=> ( ~ ( X0 @ X3 )
& ( X2 @ X3 ) ) ) ),
file('/export/starexec/sandbox2/tmp/tmp.5YIhobMa4l/DTF2THF_7220.p',cBOOL_PROP_47_pme) ).
thf(f14,plain,
( ( ( sK0 @ sK3 )
= $true )
| ( $true
!= ( sK1 @ sK3 ) ) ),
inference(cnf_transformation,[status(thm)],[f12]) ).
thf(f19,plain,
( ( sK0 @ sK3 )
!= $true ),
inference(trivial_inequality_removal,[status(thm)],[f18]) ).
thf(f18,plain,
( ( $true != $true )
| ( ( sK0 @ sK3 )
!= $true ) ),
inference(superposition,[status(thm)],[f13,f16]) ).
thf(f16,plain,
! [X3: a] :
( ( $true
= ( sK2 @ X3 ) )
| ( $true
!= ( sK0 @ X3 ) ) ),
inference(cnf_transformation,[status(thm)],[f12]) ).
thf(f13,plain,
( $true
!= ( sK2 @ sK3 ) ),
inference(cnf_transformation,[status(thm)],[f12]) ).
%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.00/0.12 % Problem : SET009^5 : 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
% 0.15/0.33 % Computer : n028.cluster.edu
% 0.15/0.33 % Model : x86_64 x86_64
% 0.15/0.33 % CPU : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz
% 0.15/0.33 % Memory : 8042.1875MB
% 0.15/0.33 % OS : Linux 3.10.0-693.el7.x86_64
% 0.15/0.34 % CPULimit : 300
% 0.15/0.34 % WCLimit : 300
% 0.15/0.34 % DateTime : Tue Feb 24 11:48:42 EST 2026
% 0.15/0.34 % CPUTime :
% 0.15/0.34 Running /export/starexec/sandbox2/solver/bin/run_DT2H2X /export/starexec/sandbox2/benchmark/theBenchmark.p 300
% 0.29/0.46 ---- Original DTF file ---
% 0.29/0.46 thf(spec,logic,$$dhol).
% 0.29/0.46 %------------------------------------------------------------------------------
% 0.29/0.46 % File : SET009^5 : TPTP v9.2.1. Released v4.0.0.
% 0.29/0.46 % Domain : Set Theory
% 0.29/0.46 % Problem : TPS problem BOOL-PROP-47
% 0.29/0.46 % Version : Especial.
% 0.29/0.46 % English : Trybulec's 47th Boolean property of sets
% 0.29/0.46
% 0.29/0.46 % Refs : [TS89] Trybulec & Swieczkowska (1989), Boolean Properties of
% 0.29/0.46 % : [Bro09] Brown (2009), Email to Geoff Sutcliffe
% 0.29/0.46 % Source : [Bro09]
% 0.29/0.46 % Names : tps_0138 [Bro09]
% 0.29/0.46 % : BOOL-PROP-47 [TPS]
% 0.29/0.46
% 0.29/0.46 % Status : Theorem
% 0.29/0.46 % Rating : 0.00 v5.3.0, 0.25 v5.2.0, 0.00 v4.0.0
% 0.29/0.46 % Syntax : Number of formulae : 2 ( 0 unt; 1 typ; 0 def)
% 0.29/0.46 % Number of atoms : 0 ( 0 equ; 0 cnn)
% 0.29/0.46 % Maximal formula atoms : 0 ( 0 avg)
% 0.29/0.46 % Number of connectives : 13 ( 2 ~; 0 |; 2 &; 6 @)
% 0.29/0.46 % ( 0 <=>; 3 =>; 0 <=; 0 <~>)
% 0.29/0.46 % Maximal formula depth : 10 ( 10 avg)
% 0.29/0.46 % Number of types : 2 ( 1 usr)
% 0.29/0.46 % Number of type conns : 3 ( 3 >; 0 *; 0 +; 0 <<)
% 0.29/0.46 % Number of symbols : 0 ( 0 usr; 0 con; --- aty)
% 0.29/0.46 % Number of variables : 5 ( 0 ^; 5 !; 0 ?; 5 :)
% 0.29/0.46 % SPC : TH0_THM_NEQ_NAR
% 0.29/0.46
% 0.29/0.46 % Comments : This problem is from the TPS library. Copyright (c) 2009 The TPS
% 0.29/0.46 % project in the Department of Mathematical Sciences at Carnegie
% 0.29/0.46 % Mellon University. Distributed under the Creative Commons copyleft
% 0.29/0.46 % license: http://creativecommons.org/licenses/by-sa/3.0/
% 0.29/0.46 % : Polymorphic definitions expanded.
% 0.29/0.46 %------------------------------------------------------------------------------
% 0.29/0.46 thf(a_type,type,
% 0.29/0.46 a: $tType ).
% 0.29/0.46
% 0.29/0.46 thf(cBOOL_PROP_47_pme,conjecture,
% 0.29/0.46 ! [X: a > $o,Y: a > $o,Z: a > $o] :
% 0.29/0.46 ( ! [Xx: a] :
% 0.29/0.46 ( ( X @ Xx )
% 0.29/0.46 => ( Y @ Xx ) )
% 0.29/0.46 => ! [Xx: a] :
% 0.29/0.46 ( ( ( Z @ Xx )
% 0.29/0.46 & ~ ( Y @ Xx ) )
% 0.29/0.46 => ( ( Z @ Xx )
% 0.29/0.46 & ~ ( X @ Xx ) ) ) ) ).
% 0.29/0.46
% 0.29/0.46 %------------------------------------------------------------------------------
% 0.29/0.46 ------------------------
% 1.46/1.24 ---- Embedded in THF ---
% 1.46/1.24 %%% This output was generated by embedproblem, version 1.9.5 (library version 1.9).
% 1.46/1.24 %%% Generated on Tue Feb 24 11:48:42 EST 2026
% 1.46/1.24 %%% using '$$dhol' embedding, version 1.3.0.
% 1.46/1.24 %%% Logic specification used:
% 1.46/1.24 %%% thf(spec, logic, $$dhol).
% 1.46/1.24
% 1.46/1.24 % SZS output start ListOfTHF for /export/starexec/sandbox2/tmp/tmp.5YIhobMa4l/DTF2DTF7220.p
% See solution above
% 1.46/1.24 ------------------------
% 1.46/1.26 ---- Cleaned THF ---
% 1.46/1.26 thf(a_type,type,
% 1.46/1.26 a: $tType ).
% 1.46/1.26
% 1.46/1.26 thf(cBOOL_PROP_47_pme,conjecture,
% 1.46/1.26 ! [X: a > $o,Y: a > $o,Z: a > $o] :
% 1.46/1.26 ( ! [Xx: a] :
% 1.46/1.26 ( ( X @ Xx )
% 1.46/1.26 => ( Y @ Xx ) )
% 1.46/1.26 => ! [Xx: a] :
% 1.46/1.26 ( ( ( Z @ Xx )
% 1.46/1.26 & ~ ( Y @ Xx ) )
% 1.46/1.26 => ( ( Z @ Xx )
% 1.46/1.26 & ~ ( X @ Xx ) ) ) ) ).
% 1.46/1.26 ------------------------
% 1.46/1.27 % (7526)lrs+1002_1:1_au=on:bd=off:e2e=on:sd=2:sos=on:ss=axioms:i=275:si=on:rtra=on_0 on DTF2THF_7220 for (2999ds/275Mi)
% 1.46/1.27 % (7525)lrs+1002_1:128_aac=none:au=on:cnfonf=lazy_not_gen_be_off:sos=all:i=2:si=on:rtra=on_0 on DTF2THF_7220 for (2999ds/2Mi)
% 1.46/1.27 % (7526)First to succeed.
% 1.46/1.27 % (7525)Instruction limit reached!
% 1.46/1.27 % (7525)------------------------------
% 1.46/1.27 % (7525)Version: Vampire 4.8 (commit 7b44b1c2f on 2025-07-15 09:50:17 +0100)
% 1.46/1.27 % (7525)Termination reason: Unknown
% 1.46/1.27 % (7525)Termination phase: Saturation
% 1.46/1.27
% 1.46/1.27 % (7525)Memory used [KB]: 5500
% 1.46/1.27 % (7525)Time elapsed: 0.002 s
% 1.46/1.27 % (7525)Instructions burned: 2 (million)
% 1.46/1.27 % (7525)------------------------------
% 1.46/1.27 % (7525)------------------------------
% 1.46/1.27 % (7526)Refutation found. Thanks to Tanya!
% 1.46/1.27 % SZS status Theorem for DTF2THF_7220
% 1.46/1.27 % SZS output start Proof for DTF2THF_7220
% 1.46/1.27 thf(type_def_5, type, a: $tType).
% 1.46/1.27 thf(func_def_0, type, a: $tType).
% 1.46/1.27 thf(func_def_4, type, sK0: a > $o).
% 1.46/1.27 thf(func_def_5, type, sK1: a > $o).
% 1.46/1.27 thf(func_def_6, type, sK2: a > $o).
% 1.46/1.27 thf(func_def_7, type, sK3: a).
% 1.46/1.27 thf(f20,plain,(
% 1.46/1.27 $false),
% 1.46/1.27 inference(subsumption_resolution,[status(thm)],[f19,f17])).
% 1.46/1.27 thf(f17,plain,(
% 1.46/1.27 ((sK0 @ sK3) = $true)),
% 1.46/1.27 inference(subsumption_resolution,[status(thm)],[f14,f15])).
% 1.46/1.27 thf(f15,plain,(
% 1.46/1.27 ($true = (sK1 @ sK3))),
% 1.46/1.27 inference(cnf_transformation,[status(thm)],[f12])).
% 1.46/1.27 thf(f12,plain,(
% 1.46/1.27 ! [X3 : a] : (($true = (sK2 @ X3)) | ($true != (sK0 @ X3))) & (($true = (sK1 @ sK3)) & (($true != (sK1 @ sK3)) | ((sK0 @ sK3) = $true)) & ($true != (sK2 @ sK3)))),
% 1.46/1.27 inference(skolemisation,[status(esa),new_symbols(skolem,[sK0,sK1,sK2,sK3])],[f9,f11,f10])).
% 1.46/1.27 thf(f10,plain,(
% 1.46/1.27 ? [X0 : a > $o,X1 : a > $o,X2 : a > $o] : (! [X3 : a] : (((X2 @ X3) = $true) | ((X0 @ X3) != $true)) & ? [X4 : a] : (((X1 @ X4) = $true) & (((X1 @ X4) != $true) | ($true = (X0 @ X4))) & ($true != (X2 @ X4)))) => (! [X3 : a] : (($true = (sK2 @ X3)) | ($true != (sK0 @ X3))) & ? [X4 : a] : (((sK1 @ X4) = $true) & (((sK1 @ X4) != $true) | ((sK0 @ X4) = $true)) & ($true != (sK2 @ X4))))),
% 1.46/1.27 introduced(definition,[],[choice_axiom])).
% 1.46/1.27 thf(f11,plain,(
% 1.46/1.27 ? [X4 : a] : (((sK1 @ X4) = $true) & (((sK1 @ X4) != $true) | ((sK0 @ X4) = $true)) & ($true != (sK2 @ X4))) => (($true = (sK1 @ sK3)) & (($true != (sK1 @ sK3)) | ((sK0 @ sK3) = $true)) & ($true != (sK2 @ sK3)))),
% 1.46/1.27 introduced(definition,[],[choice_axiom])).
% 1.46/1.27 thf(f9,plain,(
% 1.46/1.27 ? [X0 : a > $o,X1 : a > $o,X2 : a > $o] : (! [X3 : a] : (((X2 @ X3) = $true) | ((X0 @ X3) != $true)) & ? [X4 : a] : (((X1 @ X4) = $true) & (((X1 @ X4) != $true) | ($true = (X0 @ X4))) & ($true != (X2 @ X4))))),
% 1.46/1.27 inference(rectify,[status(thm)],[f8])).
% 1.46/1.27 thf(f8,plain,(
% 1.46/1.27 ? [X2 : a > $o,X1 : a > $o,X0 : a > $o] : (! [X3 : a] : (((X0 @ X3) = $true) | ((X2 @ X3) != $true)) & ? [X4 : a] : (((X1 @ X4) = $true) & (((X1 @ X4) != $true) | ($true = (X2 @ X4))) & ($true != (X0 @ X4))))),
% 1.46/1.27 inference(flattening,[status(thm)],[f7])).
% 1.46/1.27 thf(f7,plain,(
% 1.46/1.27 ? [X2 : a > $o,X1 : a > $o,X0 : a > $o] : (? [X4 : a] : ((((X1 @ X4) != $true) | ($true = (X2 @ X4))) & (($true != (X0 @ X4)) & ((X1 @ X4) = $true))) & ! [X3 : a] : (((X0 @ X3) = $true) | ((X2 @ X3) != $true)))),
% 1.46/1.27 inference(ennf_transformation,[status(thm)],[f6])).
% 1.46/1.27 thf(f6,plain,(
% 1.46/1.27 ~! [X2 : a > $o,X1 : a > $o,X0 : a > $o] : (! [X3 : a] : (((X2 @ X3) = $true) => ((X0 @ X3) = $true)) => ! [X4 : a] : ((($true != (X0 @ X4)) & ((X1 @ X4) = $true)) => (($true != (X2 @ X4)) & ((X1 @ X4) = $true))))),
% 1.46/1.27 inference(flattening,[status(thm)],[f5])).
% 1.46/1.27 thf(f5,plain,(
% 1.46/1.27 ~! [X0 : a > $o,X1 : a > $o,X2 : a > $o] : (! [X3 : a] : (((X2 @ X3) = $true) => ((X0 @ X3) = $true)) => ! [X4 : a] : ((((X1 @ X4) = $true) & ~($true = (X0 @ X4))) => (~($true = (X2 @ X4)) & ((X1 @ X4) = $true))))),
% 1.46/1.27 inference(fool_elimination,[status(thm)],[f4])).
% 1.46/1.27 thf(f4,plain,(
% 1.46/1.27 ~! [X0 : a > $o,X1 : a > $o,X2 : a > $o] : (! [X3 : a] : ((X2 @ X3) => (X0 @ X3)) => ! [X4 : a] : (((X1 @ X4) & ~(X0 @ X4)) => (~(X2 @ X4) & (X1 @ X4))))),
% 1.46/1.27 inference(rectify,[status(thm)],[f2])).
% 1.46/1.27 thf(f2,negated_conjecture,(
% 1.46/1.27 ~! [X1 : a > $o,X2 : a > $o,X0 : a > $o] : (! [X3 : a] : ((X0 @ X3) => (X1 @ X3)) => ! [X3 : a] : (((X2 @ X3) & ~(X1 @ X3)) => (~(X0 @ X3) & (X2 @ X3))))),
% 1.46/1.27 inference(negated_conjecture,[status(cth)],[f1])).
% 1.46/1.27 thf(f1,conjecture,(
% 1.46/1.27 ! [X1 : a > $o,X2 : a > $o,X0 : a > $o] : (! [X3 : a] : ((X0 @ X3) => (X1 @ X3)) => ! [X3 : a] : (((X2 @ X3) & ~(X1 @ X3)) => (~(X0 @ X3) & (X2 @ X3))))),
% 1.46/1.27 file('/export/starexec/sandbox2/tmp/tmp.5YIhobMa4l/DTF2THF_7220.p',cBOOL_PROP_47_pme)).
% 1.46/1.27 thf(f14,plain,(
% 1.46/1.27 ((sK0 @ sK3) = $true) | ($true != (sK1 @ sK3))),
% 1.46/1.27 inference(cnf_transformation,[status(thm)],[f12])).
% 1.46/1.27 thf(f19,plain,(
% 1.46/1.27 ((sK0 @ sK3) != $true)),
% 1.46/1.27 inference(trivial_inequality_removal,[status(thm)],[f18])).
% 1.46/1.27 thf(f18,plain,(
% 1.46/1.27 ($true != $true) | ((sK0 @ sK3) != $true)),
% 1.46/1.27 inference(superposition,[status(thm)],[f13,f16])).
% 1.46/1.27 thf(f16,plain,(
% 1.46/1.27 ( ! [X3 : a] : (($true = (sK2 @ X3)) | ($true != (sK0 @ X3))) )),
% 1.46/1.27 inference(cnf_transformation,[status(thm)],[f12])).
% 1.46/1.27 thf(f13,plain,(
% 1.46/1.27 ($true != (sK2 @ sK3))),
% 1.46/1.27 inference(cnf_transformation,[status(thm)],[f12])).
% 1.46/1.27 % SZS output end Proof for DTF2THF_7220
% 1.46/1.27 % (7526)------------------------------
% 1.46/1.27 % (7526)Version: Vampire 4.8 (commit 7b44b1c2f on 2025-07-15 09:50:17 +0100)
% 1.46/1.27 % (7526)Termination reason: Refutation
% 1.46/1.27
% 1.46/1.27 % (7526)Memory used [KB]: 5500
% 1.46/1.27 % (7526)Time elapsed: 0.002 s
% 1.46/1.27 % (7526)Instructions burned: 2 (million)
% 1.46/1.27 % (7526)------------------------------
% 1.46/1.27 % (7526)------------------------------
% 1.46/1.27 % (7520)Success in time 0.012 s
%------------------------------------------------------------------------------