%------------------------------------------------------------------------------
% File : Vampire---5.0.1
% Problem : GRP514-1 : TPTP v9.3.1. Released v2.6.0.
% 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 10:14:45 AM UTC 2026
% Result : Unsatisfiable 2.60s 1.32s
% Output : Refutation 2.60s
% Verified :
% SZS Type : Refutation
% Derivation depth : 13
% Number of leaves : 2
% Syntax : Number of formulae : 18 ( 18 unt; 0 def)
% Number of atoms : 18 ( 17 equ)
% Maximal formula atoms : 1 ( 1 avg)
% Number of connectives : 3 ( 3 ~; 0 |; 0 &)
% ( 0 <=>; 0 =>; 0 <=; 0 <~>)
% Maximal formula depth : 5 ( 3 avg)
% Maximal term depth : 8 ( 2 avg)
% Number of predicates : 2 ( 0 usr; 1 prp; 0-2 aty)
% Number of functors : 4 ( 4 usr; 2 con; 0-2 aty)
% Number of variables : 39 ( 39 !; 0 ?)
% Comments :
%------------------------------------------------------------------------------
fof(f1,axiom,
! [X2,X0,X1] : multiply(X0,multiply(multiply(X1,X2),inverse(multiply(X0,X2)))) = X1,
file('/export/starexec/sandbox2/benchmark/theBenchmark.p',single_axiom) ).
fof(f2,negated_conjecture,
multiply(multiply(inverse(b2),b2),a2) != a2,
file('/export/starexec/sandbox2/benchmark/theBenchmark.p',prove_these_axioms_2) ).
fof(f3,plain,
a2 != multiply(multiply(inverse(b2),b2),a2),
inference(reorient_equations,[],[f2]) ).
fof(f4,plain,
! [X2,X3,X0,X1] : multiply(X1,multiply(X0,inverse(multiply(X1,multiply(multiply(X0,X3),inverse(multiply(X2,X3))))))) = X2,
inference(superposition,[],[f1,f1]) ).
fof(f5,plain,
! [X2,X3,X0,X1] : multiply(X1,multiply(multiply(X2,multiply(multiply(X0,X3),inverse(multiply(X1,X3)))),inverse(X0))) = X2,
inference(superposition,[],[f1,f1]) ).
fof(f10,plain,
! [X0,X1] : multiply(X1,multiply(X0,inverse(X0))) = X1,
inference(superposition,[],[f4,f1]) ).
fof(f13,plain,
! [X0,X1] : multiply(X0,multiply(X1,inverse(X0))) = X1,
inference(superposition,[],[f4,f10]) ).
fof(f22,plain,
! [X2,X0,X1] : multiply(multiply(X2,X1),multiply(X0,inverse(multiply(X0,X1)))) = X2,
inference(superposition,[],[f4,f13]) ).
fof(f37,plain,
! [X2,X0,X1] : multiply(X2,X1) = multiply(multiply(X0,X1),multiply(X2,inverse(X0))),
inference(superposition,[],[f4,f22]) ).
fof(f73,plain,
! [X2,X0,X1] : multiply(X2,X1) = multiply(X2,multiply(multiply(X0,X1),inverse(X0))),
inference(superposition,[],[f5,f13]) ).
fof(f98,plain,
! [X2,X0,X1] : multiply(multiply(X0,X1),X2) = multiply(multiply(X0,X2),X1),
inference(superposition,[],[f73,f37]) ).
fof(f150,plain,
! [X2,X0,X1] : multiply(X2,X1) = multiply(X2,multiply(multiply(X0,inverse(X0)),X1)),
inference(superposition,[],[f73,f98]) ).
fof(f210,plain,
! [X0,X1] : multiply(X0,inverse(multiply(X1,inverse(X1)))) = X0,
inference(superposition,[],[f150,f10]) ).
fof(f343,plain,
! [X0,X1] : multiply(multiply(X1,inverse(X1)),X0) = X0,
inference(superposition,[],[f13,f210]) ).
fof(f405,plain,
! [X2,X0,X1] : multiply(X0,X2) = multiply(multiply(multiply(X1,inverse(X1)),X2),X0),
inference(superposition,[],[f98,f343]) ).
fof(f434,plain,
! [X2,X0] : multiply(X0,X2) = multiply(X2,X0),
inference(forward_demodulation,[],[f405,f343]) ).
fof(f621,plain,
a2 != multiply(multiply(b2,inverse(b2)),a2),
inference(superposition,[],[f3,f434]) ).
fof(f667,plain,
$false,
inference(forward_subsumption_resolution,[],[f621,f343]) ).
%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.00/0.03 % Problem : GRP514-1 : TPTP v9.3.1. Released v2.6.0.
% 0.00/0.06 % Command : run_vampire /export/starexec/sandbox2/benchmark/theBenchmark.p 300 THM
% 0.11/0.37 % Computer : n026.cluster.edu
% 0.11/0.37 % Model : x86_64 x86_64
% 0.11/0.37 % CPU : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz
% 0.11/0.37 % Memory : 8046.5625MB
% 0.11/0.37 % OS : Linux 6.8.0-71-generic
% 0.11/0.38 % CPULimit : 300
% 0.11/0.38 % WCLimit : 300
% 0.11/0.38 % DateTime : Sun Sep 27 10:09:11 UTC 2026
% 0.11/0.38 % CPUTime :
% 0.11/0.38 Running run_vampire /export/starexec/sandbox2/benchmark/theBenchmark.p 300 THM
% 0.11/0.41 Running first-order theorem proving
% 0.11/0.41 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
% 2.60/1.32 % (2599109)Detected a unit-equality problem, will run specialized UEQ schedule.
% 2.60/1.32 % (2599120)dis-1010_7_sil=8000:fde=unused:flr=on:random_seed=459223327:i=1187:sd=4:av=off:ss=axioms:sgt=32_2999 on theBenchmark for (2999ds/1187Mi)
% 2.60/1.32 % (2599120)First to succeed.
% 2.60/1.32 % (2599120)Solution written to "/export/starexec/sandbox2/tmp/vampire-proof-2599109"
% 2.60/1.32 % (2599118)dis+10_14_to=lpo:sil=8000:tgt=full:drc=off:sp=const_frequency:sos=all:random_seed=1070679297:i=181:gtgl=5:bs=unit_only:fsr=off:gtg=exists_all_2999 on theBenchmark for (2999ds/181Mi)
% 2.60/1.32 % (2599114)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=4207783331:i=138329:kws=inv_arity_squared:fgj=on:bd=preordered_2999 on theBenchmark for (2999ds/138329Mi)
% 2.60/1.32 % (2599115)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=3382894669:i=130792:sd=20:aac=none:nm=16:ss=included:sgt=10_2999 on theBenchmark for (2999ds/130792Mi)
% 2.60/1.32 % (2599116)lrs+10_1_ncem=casc2026/models/loop5.pt:sil=128000:tgt=ground:npcc=on:spb=goal_then_units:urr=ec_only:random_seed=4061763744:i=130716:gtgl=4:add=on:doe=on:bd=all:gtg=exists_sym_2999 on theBenchmark for (2999ds/130716Mi)
% 2.60/1.32 % (2599117)ott-1010_1_sfv=off:to=lpo:sil=8000:fdtod=off:sp=reverse_frequency:spb=goal_then_units:fd=preordered:random_seed=3089917917:i=136:bd=preordered:ins=2:av=off_2999 on theBenchmark for (2999ds/136Mi)
% 2.60/1.32 % (2599119)lrs+10_3_to=lpo:sil=64000:drc=off:fde=unused:sp=reverse_frequency:acc=on:bsr=on:fd=preordered:nwc=1:random_seed=3943653285:avsq=on:i=257:avsqr=16,3:bd=preordered:fsr=off_2999 on theBenchmark for (2999ds/257Mi)
% 2.60/1.32 % (2599118)Also succeeded, but the first one will report.
% 2.60/1.32 % (2599119)Also succeeded, but the first one will report.
% 2.60/1.32 % (2599117)Instruction limit reached!
% 2.60/1.32 % (2599117)------------------------------
% 2.60/1.32 % (2599117)Version: Vampire 5.0.1 (Release build, commit ea8961452 on 2026-07-16 15:14:34 +0200)
% 2.60/1.32 % (2599117)Linked with Z3 4.14.0.0 3c47fd96cf5645d0c42b2c819d9e9a84380aa721 z3-4.8.4-9178-g3c47fd96c
% 2.60/1.32 % (2599117)CaDiCaL version: 2.1.3
% 2.60/1.32 % (2599117)Termination reason: Instruction limit
% 2.60/1.32 % (2599117)Termination phase: Saturation
% 2.60/1.32 % (2599117)Time elapsed: 0.080 s
% 2.60/1.32 % (2599117)Peak memory usage: 89 MB
% 2.60/1.32 % (2599117)Instructions burned: 137 (million)
% 2.60/1.32 % (2599120)Refutation found. Thanks to Tanya!
% 2.60/1.32 % SZS status Unsatisfiable for theBenchmark
% 2.60/1.32 % SZS output start Proof for theBenchmark
% See solution above
% 2.60/1.32 % (2599120)------------------------------
% 2.60/1.32 % (2599120)Version: Vampire 5.0.1 (Release build, commit ea8961452 on 2026-07-16 15:14:34 +0200)
% 2.60/1.32 % (2599120)Linked with Z3 4.14.0.0 3c47fd96cf5645d0c42b2c819d9e9a84380aa721 z3-4.8.4-9178-g3c47fd96c
% 2.60/1.32 % (2599120)CaDiCaL version: 2.1.3
% 2.60/1.32 % (2599120)Termination reason: Refutation
% 2.60/1.32 % (2599120)Time elapsed: 0.010 s
% 2.60/1.32 % (2599120)Peak memory usage: 88 MB
% 2.60/1.32 % (2599120)Instructions burned: 30 (million)
% 2.60/1.32 % (2599120)------------------------------
% 2.60/1.32 % (2599120)------------------------------
% 2.60/1.32 % (2599109)Success in time 0.278 s
% 2.60/1.32 % Vampire exiting
%------------------------------------------------------------------------------