%------------------------------------------------------------------------------
% File : Vampire---5.0.1
% Problem : GRP013-1 : TPTP v9.3.1. Released v1.0.0.
% Transfm : none
% Format : tptp:raw
% Command : run_vampire /export/starexec/sandbox2/benchmark/theBenchmark.p 300 THM
% Computer : n004.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 10:12:07 AM UTC 2026
% Result : Unsatisfiable 3.63s 1.49s
% Output : Refutation 3.63s
% Verified :
% SZS Type : Refutation
% Derivation depth : 6
% Number of leaves : 9
% Syntax : Number of formulae : 20 ( 11 unt; 0 def)
% Number of atoms : 36 ( 0 equ)
% Maximal formula atoms : 4 ( 1 avg)
% Number of connectives : 33 ( 17 ~; 16 |; 0 &)
% ( 0 <=>; 0 =>; 0 <=; 0 <~>)
% Maximal formula depth : 11 ( 4 avg)
% Maximal term depth : 2 ( 1 avg)
% Number of predicates : 2 ( 1 usr; 1 prp; 0-3 aty)
% Number of functors : 6 ( 6 usr; 5 con; 0-1 aty)
% Number of variables : 36 ( 36 !; 0 ?)
% Comments :
%------------------------------------------------------------------------------
fof(f1,axiom,
! [X0] : product(identity,X0,X0),
file('/export/starexec/sandbox2/benchmark/theBenchmark.p',left_identity) ).
fof(f2,axiom,
! [X0] : product(X0,identity,X0),
file('/export/starexec/sandbox2/benchmark/theBenchmark.p',right_identity) ).
fof(f7,axiom,
! [X2,X3,X0,X1,X4,X5] :
( ~ product(X2,X3,X5)
| ~ product(X1,X3,X4)
| ~ product(X0,X1,X2)
| product(X0,X4,X5) ),
file('/export/starexec/sandbox2/benchmark/theBenchmark.p',associativity1) ).
fof(f8,axiom,
! [X2,X3,X0,X1,X4,X5] :
( ~ product(X1,X3,X4)
| ~ product(X0,X1,X2)
| ~ product(X0,X4,X5)
| product(X2,X3,X5) ),
file('/export/starexec/sandbox2/benchmark/theBenchmark.p',associativity2) ).
fof(f9,axiom,
! [X0] : product(X0,X0,identity),
file('/export/starexec/sandbox2/benchmark/theBenchmark.p',squareness) ).
fof(f10,axiom,
product(a,b,c),
file('/export/starexec/sandbox2/benchmark/theBenchmark.p',a_times_b_is_c) ).
fof(f11,axiom,
product(inverse(a),inverse(b),d),
file('/export/starexec/sandbox2/benchmark/theBenchmark.p',inverse_a_times_inverse_b_is_d) ).
fof(f12,axiom,
! [X2,X0,X1] :
( ~ product(inverse(X0),inverse(X1),X2)
| product(X0,X2,X1) ),
file('/export/starexec/sandbox2/benchmark/theBenchmark.p',inverses_have_property) ).
fof(f13,negated_conjecture,
~ product(c,d,identity),
file('/export/starexec/sandbox2/benchmark/theBenchmark.p',prove_c_times_d_is_identity) ).
fof(f14,plain,
product(a,d,b),
inference(resolution,[],[f12,f11]) ).
fof(f21,plain,
! [X2,X3,X0,X1] :
( ~ product(X3,X0,identity)
| ~ product(X0,X1,X2)
| product(X3,X2,X1) ),
inference(resolution,[],[f7,f1]) ).
fof(f24,plain,
! [X2,X0,X1] :
( ~ product(X2,X0,a)
| ~ product(X0,b,X1)
| product(X2,X1,c) ),
inference(resolution,[],[f7,f10]) ).
fof(f26,plain,
! [X2,X3,X0,X1] :
( ~ product(X0,identity,X3)
| ~ product(X0,X1,X2)
| product(X2,X1,X3) ),
inference(resolution,[],[f8,f9]) ).
fof(f49,plain,
! [X0] :
( ~ product(a,b,X0)
| product(identity,X0,c) ),
inference(resolution,[],[f24,f1]) ).
fof(f57,plain,
! [X2,X0,X1] :
( ~ product(X0,X1,X2)
| product(X2,X1,X0) ),
inference(resolution,[],[f26,f2]) ).
fof(f85,plain,
! [X2,X0,X1] :
( ~ product(X0,X1,X2)
| product(X0,X2,X1) ),
inference(resolution,[],[f21,f9]) ).
fof(f268,plain,
product(a,b,d),
inference(resolution,[],[f85,f14]) ).
fof(f289,plain,
product(identity,d,c),
inference(resolution,[],[f268,f49]) ).
fof(f344,plain,
product(c,d,identity),
inference(resolution,[],[f289,f57]) ).
fof(f346,plain,
$false,
inference(forward_subsumption_resolution,[],[f344,f13]) ).
%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.00/0.03 % Problem : GRP013-1 : TPTP v9.3.1. Released v1.0.0.
% 0.00/0.05 % Command : run_vampire /export/starexec/sandbox2/benchmark/theBenchmark.p 300 THM
% 0.10/0.38 % Computer : n004.cluster.edu
% 0.10/0.38 % Model : x86_64 x86_64
% 0.10/0.38 % CPU : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz
% 0.10/0.38 % Memory : 8046.5625MB
% 0.10/0.38 % OS : Linux 6.8.0-71-generic
% 0.10/0.38 % CPULimit : 300
% 0.10/0.38 % WCLimit : 300
% 0.10/0.38 % DateTime : Sun Sep 27 09:13:37 UTC 2026
% 0.10/0.38 % CPUTime :
% 0.10/0.38 Running run_vampire /export/starexec/sandbox2/benchmark/theBenchmark.p 300 THM
% 0.10/0.41 Running first-order theorem proving
% 0.10/0.41 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
% 3.63/1.49 % (3232914)Input is clausal, will run a generic CNF schedule.
% 3.63/1.49 % (3232925)dis-21_1_sil=8000:lcm=predicate:random_seed=2645207532:st=5:avsq=on:i=117:avsqr=1,16:sd=3:aac=none:ep=RS:fsr=off:ss=included_2999 on theBenchmark for (2999ds/117Mi)
% 3.63/1.49 % (3232925)Instruction limit reached!
% 3.63/1.49 % (3232925)------------------------------
% 3.63/1.49 % (3232925)Version: Vampire 5.0.1 (Release build, commit ea8961452 on 2026-07-16 15:14:34 +0200)
% 3.63/1.49 % (3232925)Linked with Z3 4.14.0.0 3c47fd96cf5645d0c42b2c819d9e9a84380aa721 z3-4.8.4-9178-g3c47fd96c
% 3.63/1.49 % (3232925)CaDiCaL version: 2.1.3
% 3.63/1.49 % (3232925)Termination reason: Instruction limit
% 3.63/1.49 % (3232925)Termination phase: Saturation
% 3.63/1.49 % (3232925)Time elapsed: 0.035 s
% 3.63/1.49 % (3232925)Peak memory usage: 88 MB
% 3.63/1.49 % (3232925)Instructions burned: 119 (million)
% 3.63/1.49 % (3232919)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=1619243219:i=140167_2999 on theBenchmark for (2999ds/140167Mi)
% 3.63/1.49 % (3232920)lrs+10_1_ncem=casc2026/models/loop8.pt:sil=128000:npcc=on:urr=on:br=off:random_seed=1406842256:i=132376:av=off_2999 on theBenchmark for (2999ds/132376Mi)
% 3.63/1.49 % (3232924)dis-1011_1_sil=16000:fde=unused:s2agt=70:random_seed=3208377915:s2a=on:i=180:gtg=position_2999 on theBenchmark for (2999ds/180Mi)
% 3.63/1.49 % (3232922)lrs+10_1_sil=8000:sp=occurrence:random_seed=4037481028:i=107:sd=3:ss=axioms:sgt=8_2999 on theBenchmark for (2999ds/107Mi)
% 3.63/1.49 % (3232921)lrs+1002_1_ncem=casc2026/models/loop8.pt:sil=128000:tgt=ground:npcc=on:sp=reverse_frequency:spb=intro:random_seed=1248607834:i=137899:s2at=10:gtgl=3:kws=precedence:add=on:bd=preordered:gtg=position_2999 on theBenchmark for (2999ds/137899Mi)
% 3.63/1.49 % (3232923)dis-1002_1_to=lpo:sil=16000:fd=off:random_seed=879352049:st=1.5:i=114:aac=none:ins=7:ss=axioms:fsd=on_2999 on theBenchmark for (2999ds/114Mi)
% 3.63/1.49 % (3232922)First to succeed.
% 3.63/1.49 % (3232922)Solution written to "/export/starexec/sandbox2/tmp/vampire-proof-3232914"
% 3.63/1.49 % (3232923)Also succeeded, but the first one will report.
% 3.63/1.49 % (3232924)Instruction limit reached!
% 3.63/1.49 % (3232924)------------------------------
% 3.63/1.49 % (3232924)Version: Vampire 5.0.1 (Release build, commit ea8961452 on 2026-07-16 15:14:34 +0200)
% 3.63/1.49 % (3232924)Linked with Z3 4.14.0.0 3c47fd96cf5645d0c42b2c819d9e9a84380aa721 z3-4.8.4-9178-g3c47fd96c
% 3.63/1.49 % (3232924)CaDiCaL version: 2.1.3
% 3.63/1.49 % (3232924)Termination reason: Instruction limit
% 3.63/1.49 % (3232924)Termination phase: Saturation
% 3.63/1.49 % (3232924)Time elapsed: 0.111 s
% 3.63/1.49 % (3232924)Peak memory usage: 89 MB
% 3.63/1.49 % (3232924)Instructions burned: 181 (million)
% 3.63/1.49 % (3232927)dis+1010_3_sil=8000:plsq=on:drc=off:fde=none:plsqc=1:bsd=on:plsqr=7,2:sos=on:spb=goal_then_units:random_seed=2518700750:i=143:sd=2:aac=none:ss=axioms:sgt=16_2998 on theBenchmark for (2998ds/143Mi)
% 3.63/1.49 % (3232927)Also succeeded, but the first one will report.
% 3.63/1.49 % (3232922)Refutation found. Thanks to Tanya!
% 3.63/1.49 % SZS status Unsatisfiable for theBenchmark
% 3.63/1.49 % SZS output start Proof for theBenchmark
% See solution above
% 3.63/1.49 % (3232922)------------------------------
% 3.63/1.49 % (3232922)Version: Vampire 5.0.1 (Release build, commit ea8961452 on 2026-07-16 15:14:34 +0200)
% 3.63/1.49 % (3232922)Linked with Z3 4.14.0.0 3c47fd96cf5645d0c42b2c819d9e9a84380aa721 z3-4.8.4-9178-g3c47fd96c
% 3.63/1.49 % (3232922)CaDiCaL version: 2.1.3
% 3.63/1.49 % (3232922)Termination reason: Refutation
% 3.63/1.49 % (3232922)Time elapsed: 0.008 s
% 3.63/1.49 % (3232922)Peak memory usage: 88 MB
% 3.63/1.49 % (3232922)Instructions burned: 10 (million)
% 3.63/1.49 % (3232922)------------------------------
% 3.63/1.49 % (3232922)------------------------------
% 3.63/1.49 % (3232914)Success in time 0.435 s
% 3.63/1.49 % Vampire exiting
%------------------------------------------------------------------------------