%------------------------------------------------------------------------------
% File : Vampire---5.0.1
% Problem : SET050-6 : TPTP v9.3.1. Bugfixed v2.1.0.
% Transfm : none
% Format : tptp:raw
% Command : run_vampire /export/starexec/sandbox/benchmark/theBenchmark.p 300 THM
% Computer : n018.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 12:39:48 PM UTC 2026
% Result : Unsatisfiable 2.56s 1.31s
% Output : Refutation 2.56s
% Verified :
% SZS Type : Refutation
% Derivation depth : 4
% Number of leaves : 8
% Syntax : Number of formulae : 16 ( 11 unt; 0 def)
% Number of atoms : 22 ( 3 equ)
% Maximal formula atoms : 3 ( 1 avg)
% Number of connectives : 16 ( 10 ~; 6 |; 0 &)
% ( 0 <=>; 0 =>; 0 <=; 0 <~>)
% Maximal formula depth : 7 ( 3 avg)
% Maximal term depth : 4 ( 1 avg)
% Number of predicates : 4 ( 2 usr; 1 prp; 0-2 aty)
% Number of functors : 9 ( 9 usr; 5 con; 0-2 aty)
% Number of variables : 21 ( 21 !; 0 ?)
% Comments :
%------------------------------------------------------------------------------
fof(f1,axiom,
! [X2,X0,X1] :
( member(X2,X1)
| ~ member(X2,X0)
| ~ subclass(X0,X1) ),
file('/export/starexec/sandbox/benchmark/theBenchmark.p',subclass_members) ).
fof(f4,axiom,
! [X0] : subclass(X0,universal_class),
file('/export/starexec/sandbox/benchmark/theBenchmark.p',class_elements_are_sets) ).
fof(f9,axiom,
! [X0,X1] :
( member(X0,unordered_pair(X0,X1))
| ~ member(X0,universal_class) ),
file('/export/starexec/sandbox/benchmark/theBenchmark.p',unordered_pair2) ).
fof(f12,axiom,
! [X0] : unordered_pair(X0,X0) = singleton(X0),
file('/export/starexec/sandbox/benchmark/theBenchmark.p',singleton_set) ).
fof(f13,axiom,
! [X0,X1] : unordered_pair(singleton(X0),unordered_pair(X0,singleton(X1))) = ordered_pair(X0,X1),
file('/export/starexec/sandbox/benchmark/theBenchmark.p',ordered_pair) ).
fof(f14,axiom,
! [X2,X3,X0,X1] :
( ~ member(ordered_pair(X0,X1),cross_product(X2,X3))
| member(X0,X2) ),
file('/export/starexec/sandbox/benchmark/theBenchmark.p',cartesian_product1) ).
fof(f101,negated_conjecture,
member(ordered_pair(x,y),cross_product(u,v)),
file('/export/starexec/sandbox/benchmark/theBenchmark.p',prove_corollary_1_to_unordered_pair_1) ).
fof(f102,negated_conjecture,
~ member(x,unordered_pair(x,y)),
file('/export/starexec/sandbox/benchmark/theBenchmark.p',prove_corollary_1_to_unordered_pair_2) ).
fof(f103,plain,
! [X0,X1] : ordered_pair(X0,X1) = unordered_pair(unordered_pair(X0,X0),unordered_pair(X0,unordered_pair(X1,X1))),
inference(definition_unfolding,[],[f13,f12,f12]) ).
fof(f107,plain,
member(unordered_pair(unordered_pair(x,x),unordered_pair(x,unordered_pair(y,y))),cross_product(u,v)),
inference(definition_unfolding,[],[f101,f103]) ).
fof(f110,plain,
! [X2,X3,X0,X1] :
( ~ member(unordered_pair(unordered_pair(X0,X0),unordered_pair(X0,unordered_pair(X1,X1))),cross_product(X2,X3))
| member(X0,X2) ),
inference(definition_unfolding,[],[f14,f103]) ).
fof(f126,plain,
~ member(x,universal_class),
inference(resolution,[],[f9,f102]) ).
fof(f128,plain,
! [X0] :
( ~ member(x,X0)
| ~ subclass(X0,universal_class) ),
inference(resolution,[],[f1,f126]) ).
fof(f131,plain,
! [X0] : ~ member(x,X0),
inference(forward_subsumption_resolution,[],[f128,f4]) ).
fof(f232,plain,
member(x,u),
inference(resolution,[],[f110,f107]) ).
fof(f235,plain,
$false,
inference(forward_subsumption_resolution,[],[f232,f131]) ).
%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.00/0.02 % Problem : SET050-6 : TPTP v9.3.1. Bugfixed v2.1.0.
% 0.00/0.04 % Command : run_vampire /export/starexec/sandbox/benchmark/theBenchmark.p 300 THM
% 0.11/0.36 % Computer : n018.cluster.edu
% 0.11/0.36 % Model : x86_64 x86_64
% 0.11/0.36 % CPU : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz
% 0.11/0.36 % Memory : 8046.5625MB
% 0.11/0.36 % OS : Linux 6.8.0-71-generic
% 0.11/0.36 % CPULimit : 300
% 0.11/0.36 % WCLimit : 300
% 0.11/0.36 % DateTime : Mon Sep 28 00:24:39 UTC 2026
% 0.11/0.37 % CPUTime :
% 0.11/0.37 Running run_vampire /export/starexec/sandbox/benchmark/theBenchmark.p 300 THM
% 0.11/0.40 Running first-order theorem proving
% 0.11/0.40 Running: /export/starexec/sandbox/solver/bin/vampire --input_syntax tptp --output_axiom_names on --mode casc -m 16384 --cores 7 -t 300 /export/starexec/sandbox/benchmark/theBenchmark.p
% 2.56/1.31 % (2884846)Input is clausal, will run a generic CNF schedule.
% 2.56/1.31 % (2884855)dis-1002_1_to=lpo:sil=16000:fd=off:random_seed=565019242:st=1.5:i=114:aac=none:ins=7:ss=axioms:fsd=on_2999 on theBenchmark for (2999ds/114Mi)
% 2.56/1.31 % (2884855)First to succeed.
% 2.56/1.31 % (2884855)Solution written to "/export/starexec/sandbox/tmp/vampire-proof-2884846"
% 2.56/1.31 % (2884856)dis-1011_1_sil=16000:fde=unused:s2agt=70:random_seed=625416012:s2a=on:i=180:gtg=position_2999 on theBenchmark for (2999ds/180Mi)
% 2.56/1.31 % (2884854)lrs+10_1_sil=8000:sp=occurrence:random_seed=3646475496:i=107:sd=3:ss=axioms:sgt=8_2999 on theBenchmark for (2999ds/107Mi)
% 2.56/1.31 % (2884852)lrs+10_1_ncem=casc2026/models/loop8.pt:sil=128000:npcc=on:urr=on:br=off:random_seed=377099670:i=132376:av=off_2999 on theBenchmark for (2999ds/132376Mi)
% 2.56/1.31 % (2884851)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=2884999405:i=140167_2999 on theBenchmark for (2999ds/140167Mi)
% 2.56/1.31 % (2884853)lrs+1002_1_ncem=casc2026/models/loop8.pt:sil=128000:tgt=ground:npcc=on:sp=reverse_frequency:spb=intro:random_seed=3110450147:i=137899:s2at=10:gtgl=3:kws=precedence:add=on:bd=preordered:gtg=position_2999 on theBenchmark for (2999ds/137899Mi)
% 2.56/1.31 % (2884854)Refutation not found, incomplete strategy
% 2.56/1.31 % (2884854)------------------------------
% 2.56/1.31 % (2884854)Version: Vampire 5.0.1 (Release build, commit ea8961452 on 2026-07-16 15:14:34 +0200)
% 2.56/1.31 % (2884854)Linked with Z3 4.14.0.0 3c47fd96cf5645d0c42b2c819d9e9a84380aa721 z3-4.8.4-9178-g3c47fd96c
% 2.56/1.31 % (2884854)CaDiCaL version: 2.1.3
% 2.56/1.31 % (2884854)Termination reason: Refutation not found, incomplete strategy
% 2.56/1.31 % (2884854)Time elapsed: 0.002 s
% 2.56/1.31 % (2884854)Peak memory usage: 88 MB
% 2.56/1.31 % (2884854)Instructions burned: 1 (million)
% 2.56/1.31 % (2884856)Also succeeded, but the first one will report.
% 2.56/1.31 % (2884857)dis-21_1_sil=8000:lcm=predicate:random_seed=1023574604: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)
% 2.56/1.31 % (2884857)Also succeeded, but the first one will report.
% 2.56/1.31 % (2884855)Refutation found. Thanks to Tanya!
% 2.56/1.31 % SZS status Unsatisfiable for theBenchmark
% 2.56/1.31 % SZS output start Proof for theBenchmark
% See solution above
% 2.56/1.31 % (2884855)------------------------------
% 2.56/1.31 % (2884855)Version: Vampire 5.0.1 (Release build, commit ea8961452 on 2026-07-16 15:14:34 +0200)
% 2.56/1.31 % (2884855)Linked with Z3 4.14.0.0 3c47fd96cf5645d0c42b2c819d9e9a84380aa721 z3-4.8.4-9178-g3c47fd96c
% 2.56/1.31 % (2884855)CaDiCaL version: 2.1.3
% 2.56/1.31 % (2884855)Termination reason: Refutation
% 2.56/1.31 % (2884855)Time elapsed: 0.004 s
% 2.56/1.31 % (2884855)Peak memory usage: 89 MB
% 2.56/1.31 % (2884855)Instructions burned: 7 (million)
% 2.56/1.31 % (2884855)------------------------------
% 2.56/1.31 % (2884855)------------------------------
% 2.56/1.31 % (2884846)Success in time 0.276 s
% 2.56/1.31 % Vampire exiting
%------------------------------------------------------------------------------