%------------------------------------------------------------------------------
% File : Vampire---5.0.1
% Problem : SET043-5 : TPTP v9.3.1. Released v1.0.0.
% Transfm : none
% Format : tptp:raw
% Command : run_vampire /export/starexec/sandbox2/benchmark/theBenchmark.p 300 THM
% Computer : n026.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 : Tue Sep 29 12:39:46 PM UTC 2026
% Result : Unsatisfiable 3.37s 16.29s
% Output : Refutation 3.37s
% Verified :
% SZS Type : Refutation
% Derivation depth : 3
% Number of leaves : 2
% Syntax : Number of formulae : 5 ( 3 unt; 0 def)
% Number of atoms : 7 ( 0 equ)
% Maximal formula atoms : 2 ( 1 avg)
% Number of connectives : 5 ( 3 ~; 2 |; 0 &)
% ( 0 <=>; 0 =>; 0 <=; 0 <~>)
% Maximal formula depth : 4 ( 2 avg)
% Maximal term depth : 1 ( 1 avg)
% Number of predicates : 2 ( 1 usr; 1 prp; 0-2 aty)
% Number of functors : 1 ( 1 usr; 1 con; 0-0 aty)
% Number of variables : 2 ( 2 !; 0 ?)
% Comments :
%------------------------------------------------------------------------------
fof(f1,negated_conjecture,
! [X0] :
( ~ element(X0,a)
| ~ element(X0,X0) ),
file('/export/starexec/sandbox2/benchmark/theBenchmark.p',clause_1) ).
fof(f2,negated_conjecture,
! [X0] :
( element(X0,X0)
| element(X0,a) ),
file('/export/starexec/sandbox2/benchmark/theBenchmark.p',clause_2) ).
fof(f4,plain,
element(a,a),
inference(factoring,[],[f2]) ).
fof(f5,plain,
~ element(a,a),
inference(resolution,[],[f4,f1]) ).
fof(f6,plain,
$false,
inference(forward_subsumption_resolution,[],[f5,f4]) ).
%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.00/0.03 % Problem : SET043-5 : TPTP v9.3.1. Released v1.0.0.
% 0.00/0.06 % Command : run_vampire /export/starexec/sandbox2/benchmark/theBenchmark.p 300 THM
% 0.11/15.48 % Computer : n026.cluster.edu
% 0.11/15.48 % Model : x86_64 x86_64
% 0.11/15.48 % CPU : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz
% 0.11/15.48 % Memory : 8046.5625MB
% 0.11/15.48 % OS : Linux 6.8.0-71-generic
% 0.11/15.48 % CPULimit : 300
% 0.11/15.48 % WCLimit : 300
% 0.11/15.48 % DateTime : Mon Sep 28 00:24:28 UTC 2026
% 0.11/15.48 % CPUTime :
% 0.11/15.48 Running run_vampire /export/starexec/sandbox2/benchmark/theBenchmark.p 300 THM
% 0.16/15.52 Running first-order theorem proving
% 0.16/15.52 Running: /export/starexec/sandbox2/solver/bin/vampire --input_syntax tptp --output_axiom_names on --mode casc -m 16384 --cores 7 -t 300 /export/starexec/sandbox2/benchmark/theBenchmark.p
% 3.37/16.29 % (3361225)Input is clausal, will run a generic CNF schedule.
% 3.37/16.29 % (3361233)lrs+10_1_sil=8000:sp=occurrence:random_seed=1602733636:i=107:sd=3:ss=axioms:sgt=8_2999 on theBenchmark for (2999ds/107Mi)
% 3.37/16.29 % (3361230)lrs+10_1_ncem=casc2026/models/loop8.pt:sil=128000:tgt=full:npcc=on:drc=off:sp=weighted_frequency:spb=goal:fd=preordered:foolp=on:random_seed=3545097409:i=140167_2999 on theBenchmark for (2999ds/140167Mi)
% 3.37/16.29 % (3361232)lrs+1002_1_ncem=casc2026/models/loop8.pt:sil=128000:tgt=ground:npcc=on:sp=reverse_frequency:spb=intro:random_seed=2294194878:i=137899:s2at=10:gtgl=3:kws=precedence:add=on:bd=preordered:gtg=position_2999 on theBenchmark for (2999ds/137899Mi)
% 3.37/16.29 % (3361236)dis-21_1_sil=8000:lcm=predicate:random_seed=3931337155:st=5:avsq=on:i=117:avsqr=1,16:sd=3:aac=none:ep=RS:fsr=off:ss=included_2999 on theBenchmark for (2999ds/117Mi)
% 3.37/16.29 % (3361231)lrs+10_1_ncem=casc2026/models/loop8.pt:sil=128000:npcc=on:urr=on:br=off:random_seed=1973819092:i=132376:av=off_2999 on theBenchmark for (2999ds/132376Mi)
% 3.37/16.29 % (3361234)dis-1002_1_to=lpo:sil=16000:fd=off:random_seed=1324931902:st=1.5:i=114:aac=none:ins=7:ss=axioms:fsd=on_2999 on theBenchmark for (2999ds/114Mi)
% 3.37/16.29 % (3361236)Also succeeded, but the first one will report.
% 3.37/16.29 % (3361234)Also succeeded, but the first one will report.
% 3.37/16.29 % (3361235)dis-1011_1_sil=16000:fde=unused:s2agt=70:random_seed=1979685215:s2a=on:i=180:gtg=position_2999 on theBenchmark for (2999ds/180Mi)
% 3.37/16.29 % (3361233)First to succeed.
% 3.37/16.29 % (3361233)Solution written to "/export/starexec/sandbox2/tmp/vampire-proof-3361225"
% 3.37/16.29 % (3361235)Also succeeded, but the first one will report.
% 3.37/16.29 % (3361244)dis+1010_3_sil=8000:plsq=on:drc=off:fde=none:plsqc=1:bsd=on:plsqr=7,2:sos=on:spb=goal_then_units:random_seed=1468407254:i=143:sd=2:aac=none:ss=axioms:sgt=16_2996 on theBenchmark for (2996ds/143Mi)
% 3.37/16.29 % (3361244)Also succeeded, but the first one will report.
% 3.37/16.29 % (3361233)Refutation found. Thanks to Tanya!
% 3.37/16.29 % SZS status Unsatisfiable for theBenchmark
% 3.37/16.29 % SZS output start Proof for theBenchmark
% See solution above
% 3.37/16.29 % (3361233)------------------------------
% 3.37/16.29 % (3361233)Version: Vampire 5.0.1 (Release build, commit ea8961452 on 2026-07-16 15:14:34 +0200)
% 3.37/16.29 % (3361233)Linked with Z3 4.14.0.0 3c47fd96cf5645d0c42b2c819d9e9a84380aa721 z3-4.8.4-9178-g3c47fd96c
% 3.37/16.29 % (3361233)CaDiCaL version: 2.1.3
% 3.37/16.29 % (3361233)Termination reason: Refutation
% 3.37/16.29 % (3361233)Time elapsed: 0.001 s
% 3.37/16.29 % (3361233)Peak memory usage: 88 MB
% 3.37/16.29 % (3361233)------------------------------
% 3.37/16.29 % (3361233)------------------------------
% 3.37/16.29 % (3361225)Success in time 0.481 s
% 3.37/16.29 % Vampire exiting
%------------------------------------------------------------------------------