%------------------------------------------------------------------------------
% File : Vampire-SAT---5.0.1
% Problem : GRP594-1 : TPTP v9.3.1. Released v2.6.0.
% Transfm : none
% Format : tptp:raw
% Command : run_vampire /export/starexec/sandbox2/benchmark/theBenchmark.p 300 SAT
% Computer : n011.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 10:18:11 AM UTC 2026
% Result : Unsatisfiable 0.10s 0.48s
% Output : Refutation 0.10s
% Verified :
% SZS Type : Refutation
% Derivation depth : 12
% Number of leaves : 3
% Syntax : Number of formulae : 20 ( 20 unt; 0 def)
% Number of atoms : 20 ( 19 equ)
% Maximal formula atoms : 1 ( 1 avg)
% Number of connectives : 5 ( 5 ~; 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 : 5 ( 5 usr; 2 con; 0-2 aty)
% Number of variables : 39 ( 39 !; 0 ?)
% Comments :
%------------------------------------------------------------------------------
fof(f1,axiom,
! [X2,X0,X1] : inverse(double_divide(double_divide(X0,X1),inverse(double_divide(X0,inverse(double_divide(X2,X1)))))) = X2,
file('/export/starexec/sandbox2/benchmark/theBenchmark.p',single_axiom) ).
fof(f2,axiom,
! [X0,X1] : multiply(X0,X1) = inverse(double_divide(X1,X0)),
file('/export/starexec/sandbox2/benchmark/theBenchmark.p',multiply) ).
fof(f3,negated_conjecture,
multiply(multiply(inverse(b2),b2),a2) != a2,
file('/export/starexec/sandbox2/benchmark/theBenchmark.p',prove_these_axioms_2) ).
fof(f4,plain,
a2 != multiply(multiply(inverse(b2),b2),a2),
inference(reorient_equations,[],[f3]) ).
fof(f5,plain,
a2 != inverse(double_divide(a2,inverse(double_divide(b2,inverse(b2))))),
inference(definition_unfolding,[],[f4,f2,f2]) ).
fof(f6,plain,
! [X2,X3,X0,X1] : double_divide(X2,X3) = inverse(double_divide(double_divide(X1,inverse(double_divide(X2,inverse(double_divide(X0,X3))))),inverse(double_divide(X1,X0)))),
inference(superposition,[],[f1,f1]) ).
fof(f7,plain,
! [X2,X0,X1] : inverse(double_divide(double_divide(double_divide(X1,X2),inverse(double_divide(X0,X2))),X0)) = X1,
inference(superposition,[],[f1,f1]) ).
fof(f21,plain,
! [X2,X0,X1] : double_divide(inverse(double_divide(double_divide(X0,inverse(double_divide(X1,X2))),X1)),X2) = X0,
inference(superposition,[],[f6,f7]) ).
fof(f31,plain,
! [X2,X0,X1] : double_divide(double_divide(inverse(double_divide(X0,X1)),X2),inverse(double_divide(X1,X2))) = X0,
inference(superposition,[],[f21,f6]) ).
fof(f52,plain,
! [X2,X0,X1] : inverse(double_divide(double_divide(double_divide(inverse(double_divide(X0,X1)),X2),X2),inverse(X0))) = X1,
inference(superposition,[],[f1,f31]) ).
fof(f74,plain,
! [X2,X0,X1] : double_divide(X0,X2) = double_divide(inverse(double_divide(X1,X0)),inverse(double_divide(inverse(X1),X2))),
inference(superposition,[],[f21,f52]) ).
fof(f95,plain,
! [X2,X0,X1] : inverse(double_divide(X2,X0)) = double_divide(inverse(double_divide(double_divide(X0,X1),inverse(X2))),X1),
inference(superposition,[],[f21,f74]) ).
fof(f120,plain,
! [X2,X0,X1] : double_divide(X0,X2) = inverse(double_divide(double_divide(X1,inverse(double_divide(X0,X2))),X1)),
inference(superposition,[],[f95,f1]) ).
fof(f142,plain,
! [X3,X0] : inverse(double_divide(double_divide(X3,inverse(X0)),X3)) = X0,
inference(superposition,[],[f120,f21]) ).
fof(f156,plain,
! [X0,X1] : double_divide(double_divide(X0,X1),X1) = X0,
inference(superposition,[],[f120,f7]) ).
fof(f211,plain,
! [X0,X1] : inverse(double_divide(X0,double_divide(X0,inverse(X1)))) = X1,
inference(superposition,[],[f142,f156]) ).
fof(f227,plain,
! [X0,X1] : double_divide(X0,inverse(X0)) = inverse(double_divide(X1,inverse(X1))),
inference(superposition,[],[f95,f142]) ).
fof(f1081,plain,
! [X0] : a2 != inverse(double_divide(a2,double_divide(X0,inverse(X0)))),
inference(superposition,[],[f5,f227]) ).
fof(f1228,plain,
a2 != a2,
inference(superposition,[],[f1081,f211]) ).
fof(f1229,plain,
$false,
inference(trivial_inequality_removal,[],[f1228]) ).
%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.00/0.02 % Problem : GRP594-1 : TPTP v9.3.1. Released v2.6.0.
% 0.00/0.04 % Command : run_vampire /export/starexec/sandbox2/benchmark/theBenchmark.p 300 SAT
% 0.10/0.37 % Computer : n011.cluster.edu
% 0.10/0.37 % Model : x86_64 x86_64
% 0.10/0.37 % CPU : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz
% 0.10/0.37 % Memory : 8046.5625MB
% 0.10/0.37 % OS : Linux 6.8.0-71-generic
% 0.10/0.37 % CPULimit : 300
% 0.10/0.37 % WCLimit : 300
% 0.10/0.37 % DateTime : Sun Sep 27 10:08:00 UTC 2026
% 0.10/0.37 % CPUTime :
% 0.10/0.37 Running run_vampire /export/starexec/sandbox2/benchmark/theBenchmark.p 300 SAT
% 0.10/0.40 Running first-order model finding
% 0.10/0.40 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
% 0.10/0.48 % (2178765)Will run a generic schedule for satisfiability detection.
% 0.10/0.48 % (2178773)dis+10_1_sil=32000:sp=arity:random_seed=4214868994:i=103:fgj=on_2999 on theBenchmark for (2999ds/103Mi)
% 0.10/0.48 % (2178771)% WARNING: option uhcvi not known.
% 0.10/0.48 % (2178771)dis+11_61:31_drc=ordering:lsd=5:bsr=unit_only:rp=on:newcnf=on:random_seed=2474775781:i=135531:add=off:rawr=on_2999 on theBenchmark for (2999ds/135531Mi)
% 0.10/0.48 % (2178775)ott+1_1_to=lpo:sil=16000:sp=reverse_arity:erd=off:random_seed=369185710:i=131_2999 on theBenchmark for (2999ds/131Mi)
% 0.10/0.48 % (2178772)dis+10_161_sil=256000:plsq=on:plsqr=61199697,1048576:gs=on:alpa=true:sac=on:slsq=on:cn=on:random_seed=68523727:i=88024:add=on:rawr=on_2999 on theBenchmark for (2999ds/88024Mi)
% 0.10/0.48 % (2178776)ott-3_16_to=lpo:sil=16000:sp=arity:fd=off:rp=on:random_seed=1386305577:i=159:bs=unit_only:nicw=on:fsr=off:amm=off_2999 on theBenchmark for (2999ds/159Mi)
% 0.10/0.48 % (2178774)ott+31_1_sil=16000:lcm=predicate:bce=on:newcnf=on:random_seed=2894981262:i=116_2999 on theBenchmark for (2999ds/116Mi)
% 0.10/0.48 % (2178770)fmb+10_1_sas=cadical:bce=on:rp=on:random_seed=1970217729_2999 on theBenchmark for (2999ds/0Mi)
% 0.10/0.48 % TRYING [1]
% 0.10/0.48 % TRYING [2]
% 0.10/0.48 % TRYING [3]
% 0.10/0.48 % (2178773)Instruction limit reached!
% 0.10/0.48 % (2178773)------------------------------
% 0.10/0.48 % (2178773)Version: Vampire 5.0.1 (Release build, commit 5ef7c2677 on 2026-07-16 16:54:09 +0200)
% 0.10/0.48 % (2178773)Linked with Z3 4.14.0.0 3c47fd96cf5645d0c42b2c819d9e9a84380aa721 z3-4.8.4-9178-g3c47fd96c
% 0.10/0.48 % (2178773)CaDiCaL version: 2.1.3
% 0.10/0.48 % (2178773)Termination reason: Instruction limit
% 0.10/0.48 % (2178773)Termination phase: Saturation
% 0.10/0.48 % (2178773)Time elapsed: 0.030 s
% 0.10/0.48 % (2178773)Peak memory usage: 12 MB
% 0.10/0.48 % (2178773)Instructions burned: 103 (million)
% 0.10/0.48 % (2178784)fmb+10_1_fmbas=predicate:sil=64000:sas=cadical:random_seed=1230788489:i=714:nm=2_2999 on theBenchmark for (2999ds/714Mi)
% 0.10/0.48 % TRYING [1]
% 0.10/0.48 % TRYING [2]
% 0.10/0.48 % TRYING [3]
% 0.10/0.48 % TRYING [4]
% 0.10/0.48 % (2178772) found proof, printing to "/export/starexec/sandbox2/tmp/vampire-proof-2178765-2178772"...
% 0.10/0.48 % (2178772)...printing done.
% 0.10/0.48 % TRYING [4]
% 0.10/0.48 % (2178772)Refutation found. Thanks to Tanya!
% 0.10/0.48 % SZS status Unsatisfiable for theBenchmark
% 0.10/0.48 % SZS output start Proof for theBenchmark
% See solution above
% 0.10/0.48 % (2178772)------------------------------
% 0.10/0.48 % (2178772)Version: Vampire 5.0.1 (Release build, commit 5ef7c2677 on 2026-07-16 16:54:09 +0200)
% 0.10/0.48 % (2178772)Linked with Z3 4.14.0.0 3c47fd96cf5645d0c42b2c819d9e9a84380aa721 z3-4.8.4-9178-g3c47fd96c
% 0.10/0.48 % (2178772)CaDiCaL version: 2.1.3
% 0.10/0.48 % (2178772)Termination reason: Refutation
% 0.10/0.48 % (2178772)Time elapsed: 0.037 s
% 0.10/0.48 % (2178772)Peak memory usage: 12 MB
% 0.10/0.48 % (2178772)Instructions burned: 66 (million)
% 0.10/0.48 % (2178765)Success in time 0.071 s
% 0.10/0.48 % Vampire exiting
%------------------------------------------------------------------------------