%------------------------------------------------------------------------------
% File : Vampire-SAT---5.0.1
% Problem : GRP001-2 : TPTP v9.3.1. Released v1.0.0.
% Transfm : none
% Format : tptp:raw
% Command : run_vampire /export/starexec/sandbox2/benchmark/theBenchmark.p 300 SAT
% Computer : n009.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 10:16:18 AM UTC 2026
% Result : Unsatisfiable 0.20s 0.49s
% Output : Refutation 0.20s
% Verified :
% SZS Type : Refutation
% Derivation depth : 8
% Number of leaves : 6
% Syntax : Number of formulae : 17 ( 17 unt; 0 def)
% Number of atoms : 17 ( 16 equ)
% Maximal formula atoms : 1 ( 1 avg)
% Number of connectives : 3 ( 3 ~; 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 : 5 ( 5 usr; 4 con; 0-2 aty)
% Number of variables : 12 ( 12 !; 0 ?)
% Comments :
%------------------------------------------------------------------------------
fof(f1,axiom,
! [X0] : multiply(identity,X0) = X0,
file('/export/starexec/sandbox2/benchmark/Axioms/GRP004-0.ax',left_identity) ).
fof(f4,axiom,
! [X2,X0,X1] : multiply(multiply(X0,X1),X2) = multiply(X0,multiply(X1,X2)),
file('/export/starexec/sandbox2/benchmark/Axioms/GRP004-0.ax',associativity) ).
fof(f5,axiom,
! [X0] : multiply(X0,identity) = X0,
file('/export/starexec/sandbox2/benchmark/theBenchmark.p',right_identity) ).
fof(f8,axiom,
! [X0] : multiply(X0,X0) = identity,
file('/export/starexec/sandbox2/benchmark/theBenchmark.p',squareness) ).
fof(f9,plain,
! [X0] : identity = multiply(X0,X0),
inference(reorient_equations,[],[f8]) ).
fof(f10,axiom,
multiply(a,b) = c,
file('/export/starexec/sandbox2/benchmark/theBenchmark.p',a_times_b_is_c) ).
fof(f11,negated_conjecture,
multiply(b,a) != c,
file('/export/starexec/sandbox2/benchmark/theBenchmark.p',prove_b_times_a_is_c) ).
fof(f12,plain,
c != multiply(b,a),
inference(reorient_equations,[],[f11]) ).
fof(f19,plain,
! [X0,X1] : multiply(X0,multiply(X0,X1)) = multiply(identity,X1),
inference(superposition,[],[f4,f9]) ).
fof(f25,plain,
! [X0] : multiply(a,multiply(b,X0)) = multiply(c,X0),
inference(superposition,[],[f4,f10]) ).
fof(f51,plain,
! [X0,X1] : multiply(X0,multiply(X0,X1)) = X1,
inference(superposition,[],[f1,f19]) ).
fof(f147,plain,
identity = multiply(a,multiply(b,c)),
inference(superposition,[],[f9,f25]) ).
fof(f234,plain,
multiply(b,c) = multiply(a,identity),
inference(superposition,[],[f51,f147]) ).
fof(f488,plain,
c = multiply(b,multiply(a,identity)),
inference(superposition,[],[f51,f234]) ).
fof(f570,plain,
c = multiply(b,a),
inference(superposition,[],[f488,f5]) ).
fof(f575,plain,
c != c,
inference(superposition,[],[f12,f570]) ).
fof(f580,plain,
$false,
inference(trivial_inequality_removal,[],[f575]) ).
%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.00/0.03 % Problem : GRP001-2 : TPTP v9.3.1. Released v1.0.0.
% 0.00/0.06 % Command : run_vampire /export/starexec/sandbox2/benchmark/theBenchmark.p 300 SAT
% 0.12/0.39 % Computer : n009.cluster.edu
% 0.12/0.39 % Model : x86_64 x86_64
% 0.12/0.39 % CPU : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz
% 0.12/0.39 % Memory : 8046.5625MB
% 0.12/0.39 % OS : Linux 6.8.0-71-generic
% 0.12/0.39 % CPULimit : 300
% 0.12/0.39 % WCLimit : 300
% 0.12/0.39 % DateTime : Sun Sep 27 09:12:29 UTC 2026
% 0.12/0.39 % CPUTime :
% 0.12/0.39 Running run_vampire /export/starexec/sandbox2/benchmark/theBenchmark.p 300 SAT
% 0.12/0.44 Running first-order model finding
% 0.12/0.44 Running: /export/starexec/sandbox2/solver/bin/vampire-ho --input_syntax tptp --output_axiom_names on --mode casc --intent sat -m 16384 --cores 7 -t 300 /export/starexec/sandbox2/benchmark/theBenchmark.p
% 0.20/0.49 % (1749711)Will run a generic schedule for satisfiability detection.
% 0.20/0.49 % (1749722)ott-3_16_to=lpo:sil=16000:sp=arity:fd=off:rp=on:random_seed=1265918615:i=159:bs=unit_only:nicw=on:fsr=off:amm=off_2999 on theBenchmark for (2999ds/159Mi)
% 0.20/0.49 % (1749717)% WARNING: option uhcvi not known.
% 0.20/0.49 % (1749716)fmb+10_1_sas=cadical:bce=on:rp=on:random_seed=3723618712_2999 on theBenchmark for (2999ds/0Mi)
% 0.20/0.49 % (1749718)dis+10_161_sil=256000:plsq=on:plsqr=61199697,1048576:gs=on:alpa=true:sac=on:slsq=on:cn=on:random_seed=2475199681:i=88024:add=on:rawr=on_2999 on theBenchmark for (2999ds/88024Mi)
% 0.20/0.49 % (1749722) found proof, printing to "/export/starexec/sandbox2/tmp/vampire-proof-1749711-1749722"...
% 0.20/0.49 % (1749719)dis+10_1_sil=32000:sp=arity:random_seed=335066225:i=103:fgj=on_2999 on theBenchmark for (2999ds/103Mi)
% 0.20/0.49 % (1749720)ott+31_1_sil=16000:lcm=predicate:bce=on:newcnf=on:random_seed=2072417966:i=116_2999 on theBenchmark for (2999ds/116Mi)
% 0.20/0.49 % (1749717)dis+11_61:31_drc=ordering:lsd=5:bsr=unit_only:rp=on:newcnf=on:random_seed=3171329455:i=135531:add=off:rawr=on_2999 on theBenchmark for (2999ds/135531Mi)
% 0.20/0.49 % (1749721)ott+1_1_to=lpo:sil=16000:sp=reverse_arity:erd=off:random_seed=1572255271:i=131_2999 on theBenchmark for (2999ds/131Mi)
% 0.20/0.49 % (1749722)...printing done.
% 0.20/0.49 % TRYING [1]
% 0.20/0.49 % TRYING [2]
% 0.20/0.49 % (1749722)Refutation found. Thanks to Tanya!
% 0.20/0.49 % SZS status Unsatisfiable for theBenchmark
% 0.20/0.49 % SZS output start Proof for theBenchmark
% See solution above
% 0.20/0.49 % (1749722)------------------------------
% 0.20/0.49 % (1749722)Version: Vampire 5.0.1 (Release build, commit 5ef7c2677 on 2026-07-16 16:54:09 +0200)
% 0.20/0.49 % (1749722)Linked with Z3 4.14.0.0 3c47fd96cf5645d0c42b2c819d9e9a84380aa721 z3-4.8.4-9178-g3c47fd96c
% 0.20/0.49 % (1749722)CaDiCaL version: 2.1.3
% 0.20/0.49 % (1749722)Termination reason: Refutation
% 0.20/0.49 % (1749722)Time elapsed: 0.013 s
% 0.20/0.49 % (1749722)Peak memory usage: 11 MB
% 0.20/0.49 % (1749722)Instructions burned: 21 (million)
% 0.20/0.49 % (1749711)Success in time 0.036 s
% 0.20/0.49 % Vampire exiting
%------------------------------------------------------------------------------