%------------------------------------------------------------------------------
% File : Vampire---5.0.1
% Problem : SET078-6 : TPTP v9.3.1. Bugfixed v2.1.0.
% Transfm : none
% Format : tptp:raw
% Command : run_vampire /export/starexec/sandbox2/benchmark/theBenchmark.p 300 THM
% Computer : n007.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 12:39:59 PM UTC 2026
% Result : Unsatisfiable 0.36s 1.02s
% Output : Refutation 0.36s
% Verified :
% SZS Type : Refutation
% Derivation depth : 2
% Number of leaves : 4
% Syntax : Number of formulae : 7 ( 6 unt; 0 def)
% Number of atoms : 8 ( 1 equ)
% Maximal formula atoms : 2 ( 1 avg)
% Number of connectives : 4 ( 3 ~; 1 |; 0 &)
% ( 0 <=>; 0 =>; 0 <=; 0 <~>)
% Maximal formula depth : 5 ( 2 avg)
% Maximal term depth : 3 ( 1 avg)
% Number of predicates : 3 ( 1 usr; 1 prp; 0-2 aty)
% Number of functors : 5 ( 5 usr; 3 con; 0-2 aty)
% Number of variables : 6 ( 6 !; 0 ?)
% Comments :
%------------------------------------------------------------------------------
fof(f10,axiom,
! [X0,X1] :
( member(X0,unordered_pair(X1,X0))
| ~ member(X0,universal_class) ),
file('/export/starexec/sandbox2/benchmark/theBenchmark.p',unordered_pair3) ).
fof(f11,axiom,
! [X0,X1] : member(unordered_pair(X0,X1),universal_class),
file('/export/starexec/sandbox2/benchmark/theBenchmark.p',unordered_pairs_in_universal) ).
fof(f12,axiom,
! [X0] : unordered_pair(X0,X0) = singleton(X0),
file('/export/starexec/sandbox2/benchmark/theBenchmark.p',singleton_set) ).
fof(f101,negated_conjecture,
~ member(singleton(y),unordered_pair(x,singleton(y))),
file('/export/starexec/sandbox2/benchmark/theBenchmark.p',prove_corollary_1_to_singletons_are_sets_1) ).
fof(f105,plain,
! [X0] : member(singleton(X0),universal_class),
inference(superposition,[],[f11,f12]) ).
fof(f109,plain,
~ member(singleton(y),universal_class),
inference(resolution,[],[f10,f101]) ).
fof(f111,plain,
$false,
inference(forward_subsumption_resolution,[],[f109,f105]) ).
%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.00/0.02 % Problem : SET078-6 : TPTP v9.3.1. Bugfixed v2.1.0.
% 0.00/0.05 % Command : run_vampire /export/starexec/sandbox2/benchmark/theBenchmark.p 300 THM
% 0.10/0.37 % Computer : n007.cluster.edu
% 0.10/0.37 % Model : x86_64 x86_64
% 0.10/0.37 % CPU : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz
% 0.10/0.37 % Memory : 8046.5625MB
% 0.10/0.37 % OS : Linux 6.8.0-71-generic
% 0.10/0.37 % CPULimit : 300
% 0.10/0.37 % WCLimit : 300
% 0.10/0.37 % DateTime : Mon Sep 28 00:31:10 UTC 2026
% 0.10/0.37 % CPUTime :
% 0.10/0.37 Running run_vampire /export/starexec/sandbox2/benchmark/theBenchmark.p 300 THM
% 0.10/0.40 Running first-order theorem proving
% 0.10/0.40 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
% 0.36/1.02 % (1923329)Input is clausal, will run a generic CNF schedule.
% 0.36/1.02 % (1923339)dis-1011_1_sil=16000:fde=unused:s2agt=70:random_seed=1801766925:s2a=on:i=180:gtg=position_2999 on theBenchmark for (2999ds/180Mi)
% 0.36/1.02 % (1923339)First to succeed.
% 0.36/1.02 % (1923340)dis-21_1_sil=8000:lcm=predicate:random_seed=3602514198: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)
% 0.36/1.02 % (1923339)Solution written to "/export/starexec/sandbox2/tmp/vampire-proof-1923329"
% 0.36/1.02 % (1923337)lrs+10_1_sil=8000:sp=occurrence:random_seed=4051863950:i=107:sd=3:ss=axioms:sgt=8_2999 on theBenchmark for (2999ds/107Mi)
% 0.36/1.02 % (1923335)lrs+10_1_ncem=casc2026/models/loop8.pt:sil=128000:npcc=on:urr=on:br=off:random_seed=3414589430:i=132376:av=off_2999 on theBenchmark for (2999ds/132376Mi)
% 0.36/1.02 % (1923338)dis-1002_1_to=lpo:sil=16000:fd=off:random_seed=777564465:st=1.5:i=114:aac=none:ins=7:ss=axioms:fsd=on_2999 on theBenchmark for (2999ds/114Mi)
% 0.36/1.02 % (1923334)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=351736167:i=140167_2999 on theBenchmark for (2999ds/140167Mi)
% 0.36/1.02 % (1923336)lrs+1002_1_ncem=casc2026/models/loop8.pt:sil=128000:tgt=ground:npcc=on:sp=reverse_frequency:spb=intro:random_seed=1313229974:i=137899:s2at=10:gtgl=3:kws=precedence:add=on:bd=preordered:gtg=position_2999 on theBenchmark for (2999ds/137899Mi)
% 0.36/1.02 % (1923337)Also succeeded, but the first one will report.
% 0.36/1.02 % (1923338)Also succeeded, but the first one will report.
% 0.36/1.02 % (1923340)Also succeeded, but the first one will report.
% 0.36/1.02 % (1923339)Refutation found. Thanks to Tanya!
% 0.36/1.02 % SZS status Unsatisfiable for theBenchmark
% 0.36/1.02 % SZS output start Proof for theBenchmark
% See solution above
% 0.36/1.02 % (1923339)------------------------------
% 0.36/1.02 % (1923339)Version: Vampire 5.0.1 (Release build, commit ea8961452 on 2026-07-16 15:14:34 +0200)
% 0.36/1.02 % (1923339)Linked with Z3 4.14.0.0 3c47fd96cf5645d0c42b2c819d9e9a84380aa721 z3-4.8.4-9178-g3c47fd96c
% 0.36/1.02 % (1923339)CaDiCaL version: 2.1.3
% 0.36/1.02 % (1923339)Termination reason: Refutation
% 0.36/1.02 % (1923339)Time elapsed: 0.002 s
% 0.36/1.02 % (1923339)Peak memory usage: 88 MB
% 0.36/1.02 % (1923339)Instructions burned: 4 (million)
% 0.36/1.02 % (1923339)------------------------------
% 0.36/1.02 % (1923339)------------------------------
% 0.36/1.02 % (1923329)Success in time 0.323 s
% 0.36/1.02 % Vampire exiting
%------------------------------------------------------------------------------