%------------------------------------------------------------------------------
% File : LisaST---0.9
% Problem : SET904+1 : TPTP v9.3.1. Released v3.2.0.
% Transfm : none
% Format : tptp:raw
% Command : casc-portfolio.sh -t 300 /export/starexec/sandbox/benchmark/theBenchmark.p
% Computer : n012.cluster.edu
% Model : x86_64 x86_64
% CPU : Intel(R) Xeon(R) CPU E5-2620 v4 2.10GHz
% Memory : 8046.5625MB
% OS : Linux 6.8.0-71-generic
% CPULimit : 300s
% WCLimit : 300s
% DateTime : Sun Sep 27 08:33:32 AM UTC 2026
% Result : Theorem 9.47s 1.75s
% Output : CNFRefutation 9.47s
% Verified :
% SZS Type : Refutation
% Derivation depth : 5
% Number of leaves : 3
% Syntax : Number of formulae : 12 ( 7 unt; 0 def)
% Number of atoms : 17 ( 2 equ)
% Maximal formula atoms : 2 ( 1 avg)
% Number of connectives : 9 ( 4 ~; 2 |; 0 &)
% ( 0 <=>; 3 =>; 0 <=; 0 <~>)
% Maximal formula depth : 5 ( 2 avg)
% Maximal term depth : 3 ( 1 avg)
% Number of predicates : 4 ( 2 usr; 1 prp; 0-2 aty)
% Number of functors : 4 ( 4 usr; 2 con; 0-2 aty)
% Number of variables : 14 ( 0 sgn 8 !; 0 ?)
% Comments :
%------------------------------------------------------------------------------
fof(commutativity_k2_xboole_0,axiom,
! [X0,X1] : 'set$uunion2'(X0,X1) = 'set$uunion2'(X1,X0) ).
fof(l21_zfmisc_1,axiom,
! [X0,X1] :
( subset('set$uunion2'(singleton(X0),X1),X1)
=> in(X0,X1) ) ).
fof(t45_zfmisc_1,conjecture,
! [X0,X1] :
( subset('set$uunion2'(singleton(X0),X1),X1)
=> in(X0,X1) ) ).
fof(negated_conjecture,negated_conjecture,
~ ! [X0,X1] :
( subset('set$uunion2'(singleton(X0),X1),X1)
=> in(X0,X1) ),
inference(negate_conjecture,[status(cth)],[t45_zfmisc_1]) ).
cnf(c2,plain,
'set$uunion2'(X0,X1) = 'set$uunion2'(X1,X0),
inference(clausification,[status(esa)],[commutativity_k2_xboole_0]) ).
cnf(c8,plain,
( in(X0,X1)
| ~ subset('set$uunion2'(singleton(X0),X1),X1) ),
inference(clausification,[status(esa)],[l21_zfmisc_1]) ).
cnf(c9,plain,
subset('set$uunion2'(singleton(sK16),sK17),sK17),
inference(clausification,[status(esa)],[negated_conjecture]) ).
cnf(c10,plain,
~ in(sK16,sK17),
inference(clausification,[status(esa)],[negated_conjecture]) ).
cnf(d0,plain,
subset('set$uunion2'(sK17,singleton(sK16)),sK17),
inference(demodulation,[status(thm)],[c9,c2]) ).
cnf(d1,plain,
( in(X0,X1)
| ~ subset('set$uunion2'(X1,singleton(X0)),X1) ),
inference(superposition,[status(thm)],[c2,c8]) ).
cnf(d2,plain,
in(sK16,sK17),
inference(resolution,[status(thm)],[d1,d0]) ).
cnf(d3,plain,
$false,
inference(resolution,[status(thm)],[c10,d2]) ).
%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.00/0.01 % Problem : SET904+1 : TPTP v9.3.1. Released v3.2.0.
% 0.00/0.02 % Command : casc-portfolio.sh -t 300 /export/starexec/sandbox/benchmark/theBenchmark.p
% 0.03/0.48 % Computer : n012.cluster.edu
% 0.03/0.48 % Model : x86_64 x86_64
% 0.03/0.48 % CPU : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz
% 0.03/0.48 % Memory : 8046.5625MB
% 0.03/0.48 % OS : Linux 6.8.0-71-generic
% 0.03/0.48 % CPULimit : 300
% 0.03/0.48 % WCLimit : 300
% 0.03/0.48 % DateTime : Sat Sep 26 08:24:35 UTC 2026
% 0.03/0.49 % CPUTime :
% 0.03/0.49 Running casc-portfolio.sh -t 300 /export/starexec/sandbox/benchmark/theBenchmark.p
% 9.47/1.75 % SZS status Theorem for theBenchmark.p
% 9.47/1.75 % SZS output start CNFRefutation for theBenchmark.p
% See solution above
%------------------------------------------------------------------------------