%------------------------------------------------------------------------------
% File : Vampire---5.0.1
% Problem : SET602+3 : TPTP v9.3.1. Released v2.2.0.
% Transfm : none
% Format : tptp:raw
% Command : run_vampire /export/starexec/sandbox2/benchmark/theBenchmark.p 300 THM
% Computer : n020.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 12:41:18 PM UTC 2026
% Result : Theorem 3.44s 1.65s
% Output : Refutation 3.44s
% Verified :
% SZS Type : Refutation
% Derivation depth : 7
% Number of leaves : 3
% Syntax : Number of formulae : 13 ( 9 unt; 0 def)
% Number of atoms : 19 ( 10 equ)
% Maximal formula atoms : 4 ( 1 avg)
% Number of connectives : 16 ( 10 ~; 4 |; 1 &)
% ( 1 <=>; 0 =>; 0 <=; 0 <~>)
% Maximal formula depth : 6 ( 3 avg)
% Maximal term depth : 2 ( 1 avg)
% Number of predicates : 3 ( 1 usr; 1 prp; 0-2 aty)
% Number of functors : 3 ( 3 usr; 2 con; 0-2 aty)
% Number of variables : 11 ( 10 !; 1 ?)
% Comments :
%------------------------------------------------------------------------------
fof(f1,axiom,
! [X0,X1] :
( difference(X0,X1) = empty_set
<=> subset(X0,X1) ),
file('/export/starexec/sandbox2/benchmark/theBenchmark.p',difference_empty_set) ).
fof(f6,axiom,
! [X0] : subset(X0,X0),
file('/export/starexec/sandbox2/benchmark/theBenchmark.p',reflexivity_of_subset) ).
fof(f8,conjecture,
! [X0] : difference(X0,X0) = empty_set,
file('/export/starexec/sandbox2/benchmark/theBenchmark.p',prove_self_difference_is_empty_set) ).
fof(f9,negated_conjecture,
~ ! [X0] : difference(X0,X0) = empty_set,
inference(negated_conjecture,[status(cth)],[f8]) ).
fof(f10,plain,
? [X0] : empty_set != difference(X0,X0),
inference(ennf_transformation,[],[f9]) ).
fof(f12,plain,
empty_set != difference(sK0,sK0),
inference(skolemize,[status(esa),new_symbols(skolem,[sK0]),skolemize(X0,sK0)],[f10]) ).
fof(f15,plain,
! [X0,X1] :
( ( difference(X0,X1) = empty_set
| ~ subset(X0,X1) )
& ( subset(X0,X1)
| difference(X0,X1) != empty_set ) ),
inference(nnf_transformation,[],[f1]) ).
fof(f21,plain,
empty_set != difference(sK0,sK0),
inference(cnf_transformation,[],[f12]) ).
fof(f26,plain,
! [X0,X1] :
( difference(X0,X1) = empty_set
| ~ subset(X0,X1) ),
inference(cnf_transformation,[],[f15]) ).
fof(f31,plain,
! [X0] : subset(X0,X0),
inference(cnf_transformation,[],[f6]) ).
fof(f37,plain,
( empty_set != empty_set
| ~ subset(sK0,sK0) ),
inference(superposition,[],[f21,f26]) ).
fof(f39,plain,
~ subset(sK0,sK0),
inference(trivial_inequality_removal,[],[f37]) ).
fof(f40,plain,
$false,
inference(forward_subsumption_resolution,[],[f39,f31]) ).
%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.00/0.03 % Problem : SET602+3 : TPTP v9.3.1. Released v2.2.0.
% 0.00/0.06 % Command : run_vampire /export/starexec/sandbox2/benchmark/theBenchmark.p 300 THM
% 0.12/0.57 % Computer : n020.cluster.edu
% 0.12/0.57 % Model : x86_64 x86_64
% 0.12/0.57 % CPU : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz
% 0.12/0.57 % Memory : 8046.5625MB
% 0.12/0.57 % OS : Linux 6.8.0-71-generic
% 0.12/0.57 % CPULimit : 300
% 0.12/0.57 % WCLimit : 300
% 0.12/0.57 % DateTime : Mon Sep 28 02:18:37 UTC 2026
% 0.12/0.58 % CPUTime :
% 0.12/0.58 Running run_vampire /export/starexec/sandbox2/benchmark/theBenchmark.p 300 THM
% 0.12/0.61 Running first-order theorem proving
% 0.12/0.61 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
% 3.44/1.65 % (3971896)Detected formulas, will run a generic FOF schedule.
% 3.44/1.65 % (3971925)dis-1011_1_sil=16000:fde=unused:s2agt=70:random_seed=3988447159:s2a=on:i=139:gtg=position_2999 on theBenchmark for (2999ds/139Mi)
% 3.44/1.65 % (3971923)lrs+1010_1_to=lpo:sil=32000:sos=on:spb=goal_then_units:bce=on:random_seed=1514209136:i=109:sd=1:ins=1:gsp=on:ss=axioms_2999 on theBenchmark for (2999ds/109Mi)
% 3.44/1.65 % (3971924)dis-1010_2:3_sil=16000:sp=reverse_frequency:random_seed=3618336692:i=119:av=off:ss=axioms_2999 on theBenchmark for (2999ds/119Mi)
% 3.44/1.65 % (3971921)lrs+11_1_ncem=casc2026/models/loop8.pt:sil=128000:npcc=on:lma=off:spb=units:urr=ec_only:bce=on:s2agt=64:updr=off:random_seed=281068374:i=134677:sd=20:aac=none:nm=16:ss=included:sgt=10_2999 on theBenchmark for (2999ds/134677Mi)
% 3.44/1.65 % (3971922)lrs+1010_1_anc=all:sfv=off:to=kbo:ncem=casc2026/models/loop7.pt:sil=128000:npcc=on:prc=on:sos=all:bsr=unit_only:sac=on:random_seed=3175882137:i=141695:sd=1:nm=32:gsp=on:ss=included_2999 on theBenchmark for (2999ds/141695Mi)
% 3.44/1.65 % (3971920)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=3493921875:i=141193_2999 on theBenchmark for (2999ds/141193Mi)
% 3.44/1.65 % (3971924)First to succeed.
% 3.44/1.65 % (3971923)Also succeeded, but the first one will report.
% 3.44/1.65 % (3971925)Also succeeded, but the first one will report.
% 3.44/1.65 % (3971924)Solution written to "/export/starexec/sandbox2/tmp/vampire-proof-3971896"
% 3.44/1.65 % (3971926)dis-21_1_sil=8000:lcm=predicate:random_seed=2788314279:st=5:avsq=on:i=129:avsqr=1,16:sd=3:aac=none:ep=RS:fsr=off:ss=included_2999 on theBenchmark for (2999ds/129Mi)
% 3.44/1.65 % (3971926)Also succeeded, but the first one will report.
% 3.44/1.65 % (3971934)lrs+10_1_sil=8000:sp=occurrence:random_seed=3450839166:i=285:sd=3:ss=axioms:sgt=8_2997 on theBenchmark for (2997ds/285Mi)
% 3.44/1.65 % (3971934)Also succeeded, but the first one will report.
% 3.44/1.65 % (3971924)Refutation found. Thanks to Tanya!
% 3.44/1.65 % SZS status Theorem for theBenchmark
% 3.44/1.65 % SZS output start Proof for theBenchmark
% See solution above
% 3.44/1.65 % (3971924)------------------------------
% 3.44/1.65 % (3971924)Version: Vampire 5.0.1 (Release build, commit ea8961452 on 2026-07-16 15:14:34 +0200)
% 3.44/1.65 % (3971924)Linked with Z3 4.14.0.0 3c47fd96cf5645d0c42b2c819d9e9a84380aa721 z3-4.8.4-9178-g3c47fd96c
% 3.44/1.65 % (3971924)CaDiCaL version: 2.1.3
% 3.44/1.65 % (3971924)Termination reason: Refutation
% 3.44/1.65 % (3971924)Time elapsed: 0.002 s
% 3.44/1.65 % (3971924)Peak memory usage: 88 MB
% 3.44/1.65 % (3971924)Instructions burned: 1 (million)
% 3.44/1.65 % (3971924)------------------------------
% 3.44/1.65 % (3971924)------------------------------
% 3.44/1.65 % (3971896)Success in time 0.399 s
% 3.44/1.65 % Vampire exiting
%------------------------------------------------------------------------------