%------------------------------------------------------------------------------
% File : Vampire---5.0.1
% Problem : GRP163-1 : TPTP v9.3.1. Bugfixed v1.2.1.
% Transfm : none
% Format : tptp:raw
% Command : run_vampire /export/starexec/sandbox2/benchmark/theBenchmark.p 300 THM
% Computer : n015.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 10:13:07 AM UTC 2026
% Result : Unsatisfiable 3.77s 1.53s
% Output : Refutation 3.77s
% Verified :
% SZS Type : Refutation
% Derivation depth : 5
% Number of leaves : 4
% Syntax : Number of formulae : 11 ( 11 unt; 0 def)
% Number of atoms : 11 ( 10 equ)
% Maximal formula atoms : 1 ( 1 avg)
% Number of connectives : 2 ( 2 ~; 0 |; 0 &)
% ( 0 <=>; 0 =>; 0 <=; 0 <~>)
% Maximal formula depth : 4 ( 2 avg)
% Maximal term depth : 3 ( 1 avg)
% Number of predicates : 2 ( 0 usr; 1 prp; 0-2 aty)
% Number of functors : 4 ( 4 usr; 3 con; 0-2 aty)
% Number of variables : 4 ( 4 !; 0 ?)
% Comments :
%------------------------------------------------------------------------------
fof(f7,axiom,
! [X2,X0,X1] : greatest_lower_bound(X0,greatest_lower_bound(X1,X2)) = greatest_lower_bound(greatest_lower_bound(X0,X1),X2),
file('/export/starexec/sandbox2/benchmark/theBenchmark.p',associativity_of_glb) ).
fof(f17,axiom,
greatest_lower_bound(a,b) = a,
file('/export/starexec/sandbox2/benchmark/theBenchmark.p',ax_transb_1) ).
fof(f18,plain,
a = greatest_lower_bound(a,b),
inference(reorient_equations,[],[f17]) ).
fof(f19,axiom,
greatest_lower_bound(b,c) = b,
file('/export/starexec/sandbox2/benchmark/theBenchmark.p',ax_transb_2) ).
fof(f20,plain,
b = greatest_lower_bound(b,c),
inference(reorient_equations,[],[f19]) ).
fof(f21,negated_conjecture,
greatest_lower_bound(a,c) != a,
file('/export/starexec/sandbox2/benchmark/theBenchmark.p',prove_ax_transb) ).
fof(f22,plain,
a != greatest_lower_bound(a,c),
inference(reorient_equations,[],[f21]) ).
fof(f101,plain,
! [X0] : greatest_lower_bound(a,greatest_lower_bound(b,X0)) = greatest_lower_bound(a,X0),
inference(superposition,[],[f7,f18]) ).
fof(f204,plain,
greatest_lower_bound(a,b) = greatest_lower_bound(a,c),
inference(superposition,[],[f101,f20]) ).
fof(f216,plain,
a = greatest_lower_bound(a,c),
inference(forward_demodulation,[],[f204,f18]) ).
fof(f218,plain,
$false,
inference(forward_subsumption_resolution,[],[f216,f22]) ).
%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.00/0.03 % Problem : GRP163-1 : TPTP v9.3.1. Bugfixed v1.2.1.
% 0.00/0.06 % Command : run_vampire /export/starexec/sandbox2/benchmark/theBenchmark.p 300 THM
% 0.13/0.40 % Computer : n015.cluster.edu
% 0.13/0.40 % Model : x86_64 x86_64
% 0.13/0.40 % CPU : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz
% 0.13/0.40 % Memory : 8046.5625MB
% 0.13/0.40 % OS : Linux 6.8.0-71-generic
% 0.13/0.40 % CPULimit : 300
% 0.13/0.40 % WCLimit : 300
% 0.13/0.40 % DateTime : Sun Sep 27 09:37:45 UTC 2026
% 0.13/0.40 % CPUTime :
% 0.13/0.40 Running run_vampire /export/starexec/sandbox2/benchmark/theBenchmark.p 300 THM
% 0.13/0.43 Running first-order theorem proving
% 0.13/0.43 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
% 3.77/1.53 % (1401652)Detected a unit-equality problem, will run specialized UEQ schedule.
% 3.77/1.53 % (1401659)lrs+10_1_ncem=casc2026/models/loop5.pt:sil=128000:tgt=ground:npcc=on:spb=goal_then_units:urr=ec_only:random_seed=60327337:i=130716:gtgl=4:add=on:doe=on:bd=all:gtg=exists_sym_2999 on theBenchmark for (2999ds/130716Mi)
% 3.77/1.53 % (1401661)dis+10_14_to=lpo:sil=8000:tgt=full:drc=off:sp=const_frequency:sos=all:random_seed=4189910877:i=181:gtgl=5:bs=unit_only:fsr=off:gtg=exists_all_2999 on theBenchmark for (2999ds/181Mi)
% 3.77/1.53 % (1401657)lrs+1002_1_ncem=casc2026/models/loop7.pt:sil=128000:tgt=ground:npcc=on:drc=off:sp=reverse_frequency:spb=goal:acc=on:s2agt=16:kmz=on:sac=on:random_seed=383353849:i=138329:kws=inv_arity_squared:fgj=on:bd=preordered_2999 on theBenchmark for (2999ds/138329Mi)
% 3.77/1.53 % (1401662)lrs+10_3_to=lpo:sil=64000:drc=off:fde=unused:sp=reverse_frequency:acc=on:bsr=on:fd=preordered:nwc=1:random_seed=2079947078:avsq=on:i=257:avsqr=16,3:bd=preordered:fsr=off_2999 on theBenchmark for (2999ds/257Mi)
% 3.77/1.53 % (1401663)dis-1010_7_sil=8000:fde=unused:flr=on:random_seed=3414114551:i=1187:sd=4:av=off:ss=axioms:sgt=32_2999 on theBenchmark for (2999ds/1187Mi)
% 3.77/1.53 % (1401660)ott-1010_1_sfv=off:to=lpo:sil=8000:fdtod=off:sp=reverse_frequency:spb=goal_then_units:fd=preordered:random_seed=2426081412:i=136:bd=preordered:ins=2:av=off_2999 on theBenchmark for (2999ds/136Mi)
% 3.77/1.53 % (1401658)lrs+11_1_ncem=casc2026/models/loop6.pt:sil=128000:npcc=on:lma=off:spb=units:urr=ec_only:bce=on:s2agt=64:updr=off:random_seed=655345106:i=130792:sd=20:aac=none:nm=16:ss=included:sgt=10_2999 on theBenchmark for (2999ds/130792Mi)
% 3.77/1.53 % (1401663)First to succeed.
% 3.77/1.53 % (1401663)Solution written to "/export/starexec/sandbox2/tmp/vampire-proof-1401652"
% 3.77/1.53 % (1401660)Also succeeded, but the first one will report.
% 3.77/1.53 % (1401662)Also succeeded, but the first one will report.
% 3.77/1.53 % (1401661)Also succeeded, but the first one will report.
% 3.77/1.53 % (1401663)Refutation found. Thanks to Tanya!
% 3.77/1.53 % SZS status Unsatisfiable for theBenchmark
% 3.77/1.53 % SZS output start Proof for theBenchmark
% See solution above
% 3.77/1.53 % (1401663)------------------------------
% 3.77/1.53 % (1401663)Version: Vampire 5.0.1 (Release build, commit ea8961452 on 2026-07-16 15:14:34 +0200)
% 3.77/1.53 % (1401663)Linked with Z3 4.14.0.0 3c47fd96cf5645d0c42b2c819d9e9a84380aa721 z3-4.8.4-9178-g3c47fd96c
% 3.77/1.53 % (1401663)CaDiCaL version: 2.1.3
% 3.77/1.53 % (1401663)Termination reason: Refutation
% 3.77/1.53 % (1401663)Time elapsed: 0.006 s
% 3.77/1.53 % (1401663)Peak memory usage: 88 MB
% 3.77/1.53 % (1401663)Instructions burned: 8 (million)
% 3.77/1.53 % (1401663)------------------------------
% 3.77/1.53 % (1401663)------------------------------
% 3.77/1.53 % (1401652)Success in time 0.445 s
% 3.77/1.53 % Vampire exiting
%------------------------------------------------------------------------------