%------------------------------------------------------------------------------
% File : Vampire---5.0.1
% Problem : GRP657+1 : TPTP v9.3.1. Released v4.0.0.
% Transfm : none
% Format : tptp:raw
% Command : run_vampire /export/starexec/sandbox/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 10:15:27 AM UTC 2026
% Result : Theorem 4.25s 1.49s
% Output : Refutation 4.25s
% Verified :
% SZS Type : Refutation
% Derivation depth : 11
% Number of leaves : 6
% Syntax : Number of formulae : 30 ( 24 unt; 0 def)
% Number of atoms : 36 ( 35 equ)
% Maximal formula atoms : 2 ( 1 avg)
% Number of connectives : 16 ( 10 ~; 4 |; 2 &)
% ( 0 <=>; 0 =>; 0 <=; 0 <~>)
% Maximal formula depth : 5 ( 3 avg)
% Maximal term depth : 5 ( 2 avg)
% Number of predicates : 2 ( 0 usr; 1 prp; 0-2 aty)
% Number of functors : 4 ( 4 usr; 0 con; 1-2 aty)
% Number of variables : 60 ( 57 !; 3 ?)
% Comments :
%------------------------------------------------------------------------------
fof(f1,axiom,
! [X0,X1] : mult(X1,ld(X1,X0)) = X0,
file('/export/starexec/sandbox/benchmark/theBenchmark.p',f01) ).
fof(f2,axiom,
! [X0,X1] : ld(X1,mult(X1,X0)) = X0,
file('/export/starexec/sandbox/benchmark/theBenchmark.p',f02) ).
fof(f3,axiom,
! [X0,X1] : mult(rd(X1,X0),X0) = X1,
file('/export/starexec/sandbox/benchmark/theBenchmark.p',f03) ).
fof(f4,axiom,
! [X0,X1] : rd(mult(X1,X0),X0) = X1,
file('/export/starexec/sandbox/benchmark/theBenchmark.p',f04) ).
fof(f5,axiom,
! [X0,X1,X2] : mult(mult(X2,X1),mult(X0,X2)) = mult(X2,mult(mult(X1,X0),X2)),
file('/export/starexec/sandbox/benchmark/theBenchmark.p',f05) ).
fof(f6,conjecture,
? [X0] :
! [X1] :
( mult(X1,X0) = X1
& mult(X0,X1) = X1 ),
file('/export/starexec/sandbox/benchmark/theBenchmark.p',goals) ).
fof(f7,negated_conjecture,
~ ? [X0] :
! [X1] :
( mult(X1,X0) = X1
& mult(X0,X1) = X1 ),
inference(negated_conjecture,[status(cth)],[f6]) ).
fof(f8,plain,
! [X0] :
? [X1] :
( mult(X1,X0) != X1
| mult(X0,X1) != X1 ),
inference(ennf_transformation,[],[f7]) ).
fof(f9,plain,
! [X0] :
( sK0(X0) != mult(sK0(X0),X0)
| sK0(X0) != mult(X0,sK0(X0)) ),
inference(skolemize,[status(esa),new_symbols(skolem,[sK0]),skolemize(X1,sK0(X0))],[f8]) ).
fof(f10,plain,
! [X0,X1] : mult(X1,ld(X1,X0)) = X0,
inference(cnf_transformation,[],[f1]) ).
fof(f11,plain,
! [X0,X1] : ld(X1,mult(X1,X0)) = X0,
inference(cnf_transformation,[],[f2]) ).
fof(f12,plain,
! [X0,X1] : mult(rd(X1,X0),X0) = X1,
inference(cnf_transformation,[],[f3]) ).
fof(f13,plain,
! [X0,X1] : rd(mult(X1,X0),X0) = X1,
inference(cnf_transformation,[],[f4]) ).
fof(f14,plain,
! [X2,X0,X1] : mult(mult(X2,X1),mult(X0,X2)) = mult(X2,mult(mult(X1,X0),X2)),
inference(cnf_transformation,[],[f5]) ).
fof(f15,plain,
! [X0] :
( sK0(X0) != mult(sK0(X0),X0)
| sK0(X0) != mult(X0,sK0(X0)) ),
inference(cnf_transformation,[],[f9]) ).
fof(f17,plain,
! [X0,X1] : rd(X0,ld(X1,X0)) = X1,
inference(superposition,[],[f13,f10]) ).
fof(f18,plain,
! [X2,X0,X1] : mult(X1,mult(mult(ld(X1,X0),X2),X1)) = mult(X0,mult(X2,X1)),
inference(superposition,[],[f14,f10]) ).
fof(f22,plain,
! [X2,X0,X1] : mult(mult(X1,X2),X0) = mult(X1,mult(mult(X2,rd(X0,X1)),X1)),
inference(superposition,[],[f14,f12]) ).
fof(f37,plain,
! [X2,X0,X1] : mult(mult(ld(X2,X0),X1),X2) = ld(X2,mult(X0,mult(X1,X2))),
inference(superposition,[],[f11,f18]) ).
fof(f40,plain,
! [X2,X0,X1] : mult(X1,mult(X0,X1)) = mult(mult(X1,rd(X0,rd(X2,X1))),X2),
inference(superposition,[],[f22,f12]) ).
fof(f216,plain,
! [X0,X1] : mult(X0,X1) = mult(mult(ld(X1,X1),X0),X1),
inference(superposition,[],[f37,f11]) ).
fof(f308,plain,
! [X0,X1] : rd(mult(X0,X1),X1) = mult(ld(X1,X1),X0),
inference(superposition,[],[f13,f216]) ).
fof(f332,plain,
! [X0,X1] : mult(ld(X1,X1),X0) = X0,
inference(forward_demodulation,[],[f308,f13]) ).
fof(f496,plain,
! [X0,X1] : mult(ld(X0,X0),mult(X1,ld(X0,X0))) = mult(rd(X1,rd(X0,ld(X0,X0))),X0),
inference(superposition,[],[f216,f40]) ).
fof(f527,plain,
! [X0,X1] : mult(rd(X1,X0),X0) = mult(ld(X0,X0),mult(X1,ld(X0,X0))),
inference(forward_demodulation,[],[f496,f17]) ).
fof(f534,plain,
! [X0,X1] : mult(rd(X1,X0),X0) = mult(X1,ld(X0,X0)),
inference(forward_demodulation,[],[f527,f332]) ).
fof(f536,plain,
! [X0,X1] : mult(X1,ld(X0,X0)) = X1,
inference(forward_demodulation,[],[f534,f12]) ).
fof(f575,plain,
! [X0] :
( sK0(ld(X0,X0)) != sK0(ld(X0,X0))
| sK0(ld(X0,X0)) != mult(ld(X0,X0),sK0(ld(X0,X0))) ),
inference(superposition,[],[f15,f536]) ).
fof(f576,plain,
! [X0] : sK0(ld(X0,X0)) != mult(ld(X0,X0),sK0(ld(X0,X0))),
inference(trivial_inequality_removal,[],[f575]) ).
fof(f577,plain,
$false,
inference(forward_subsumption_resolution,[],[f576,f332]) ).
%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.00/0.02 % Problem : GRP657+1 : TPTP v9.3.1. Released v4.0.0.
% 0.00/0.05 % Command : run_vampire /export/starexec/sandbox/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
% 0.11/0.37 % CPULimit : 300
% 0.11/0.37 % WCLimit : 300
% 0.11/0.37 % DateTime : Sun Sep 27 10:35:11 UTC 2026
% 0.11/0.37 % CPUTime :
% 0.11/0.37 Running run_vampire /export/starexec/sandbox/benchmark/theBenchmark.p 300 THM
% 0.11/0.40 Running first-order theorem proving
% 0.11/0.40 Running: /export/starexec/sandbox/solver/bin/vampire --input_syntax tptp --output_axiom_names on --mode casc -m 16384 --cores 7 -t 300 /export/starexec/sandbox/benchmark/theBenchmark.p
% 4.25/1.49 % (2636202)Detected formulas, will run a generic FOF schedule.
% 4.25/1.49 % (2636210)lrs+1010_1_to=lpo:sil=32000:sos=on:spb=goal_then_units:bce=on:random_seed=520208734:i=109:sd=1:ins=1:gsp=on:ss=axioms_2999 on theBenchmark for (2999ds/109Mi)
% 4.25/1.49 % (2636210)Refutation not found, incomplete strategy
% 4.25/1.49 % (2636210)------------------------------
% 4.25/1.49 % (2636210)Version: Vampire 5.0.1 (Release build, commit ea8961452 on 2026-07-16 15:14:34 +0200)
% 4.25/1.49 % (2636210)Linked with Z3 4.14.0.0 3c47fd96cf5645d0c42b2c819d9e9a84380aa721 z3-4.8.4-9178-g3c47fd96c
% 4.25/1.49 % (2636210)CaDiCaL version: 2.1.3
% 4.25/1.49 % (2636210)Termination reason: Refutation not found, incomplete strategy
% 4.25/1.49 % (2636210)Time elapsed: 0.001 s
% 4.25/1.49 % (2636210)Peak memory usage: 88 MB
% 4.25/1.49 % (2636209)lrs+1010_1_anc=all:sfv=off:to=kbo:ncem=casc2026/models/loop7.pt:sil=128000:npcc=on:prc=on:sos=all:bsr=unit_only:sac=on:random_seed=3966822684:i=141695:sd=1:nm=32:gsp=on:ss=included_2999 on theBenchmark for (2999ds/141695Mi)
% 4.25/1.49 % (2636207)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=3921535913:i=141193_2999 on theBenchmark for (2999ds/141193Mi)
% 4.25/1.49 % (2636208)lrs+11_1_ncem=casc2026/models/loop8.pt:sil=128000:npcc=on:lma=off:spb=units:urr=ec_only:bce=on:s2agt=64:updr=off:random_seed=2550166565:i=134677:sd=20:aac=none:nm=16:ss=included:sgt=10_2999 on theBenchmark for (2999ds/134677Mi)
% 4.25/1.49 % (2636211)dis-1010_2:3_sil=16000:sp=reverse_frequency:random_seed=4032219267:i=119:av=off:ss=axioms_2999 on theBenchmark for (2999ds/119Mi)
% 4.25/1.49 % (2636213)dis-21_1_sil=8000:lcm=predicate:random_seed=4240588394:st=5:avsq=on:i=129:avsqr=1,16:sd=3:aac=none:ep=RS:fsr=off:ss=included_2999 on theBenchmark for (2999ds/129Mi)
% 4.25/1.49 % (2636212)dis-1011_1_sil=16000:fde=unused:s2agt=70:random_seed=2945575064:s2a=on:i=139:gtg=position_2999 on theBenchmark for (2999ds/139Mi)
% 4.25/1.49 % (2636213)Refutation not found, incomplete strategy
% 4.25/1.49 % (2636213)------------------------------
% 4.25/1.49 % (2636213)Version: Vampire 5.0.1 (Release build, commit ea8961452 on 2026-07-16 15:14:34 +0200)
% 4.25/1.49 % (2636213)Linked with Z3 4.14.0.0 3c47fd96cf5645d0c42b2c819d9e9a84380aa721 z3-4.8.4-9178-g3c47fd96c
% 4.25/1.49 % (2636213)CaDiCaL version: 2.1.3
% 4.25/1.49 % (2636213)Termination reason: Refutation not found, incomplete strategy
% 4.25/1.49 % (2636213)Time elapsed: 0.001 s
% 4.25/1.49 % (2636213)Peak memory usage: 88 MB
% 4.25/1.49 % (2636212)First to succeed.
% 4.25/1.49 % (2636212)Solution written to "/export/starexec/sandbox/tmp/vampire-proof-2636202"
% 4.25/1.49 % (2636211)Instruction limit reached!
% 4.25/1.49 % (2636211)------------------------------
% 4.25/1.49 % (2636211)Version: Vampire 5.0.1 (Release build, commit ea8961452 on 2026-07-16 15:14:34 +0200)
% 4.25/1.49 % (2636211)Linked with Z3 4.14.0.0 3c47fd96cf5645d0c42b2c819d9e9a84380aa721 z3-4.8.4-9178-g3c47fd96c
% 4.25/1.49 % (2636211)CaDiCaL version: 2.1.3
% 4.25/1.49 % (2636211)Termination reason: Instruction limit
% 4.25/1.49 % (2636211)Termination phase: Saturation
% 4.25/1.49 % (2636211)Time elapsed: 0.068 s
% 4.25/1.49 % (2636211)Peak memory usage: 88 MB
% 4.25/1.49 % (2636211)Instructions burned: 120 (million)
% 4.25/1.49 % (2636210)------------------------------
% 4.25/1.49 % (2636210)------------------------------
% 4.25/1.49 % (2636222)lrs+10_1_sil=32000:urr=on:br=off:random_seed=1196922973:i=157:sd=1:gtg=position:ss=axioms:sgt=8_2997 on theBenchmark for (2997ds/157Mi)
% 4.25/1.49 % (2636222)Also succeeded, but the first one will report.
% 4.25/1.49 % (2636221)lrs+10_1_sil=8000:sp=occurrence:random_seed=2555410930:i=285:sd=3:ss=axioms:sgt=8_2997 on theBenchmark for (2997ds/285Mi)
% 4.25/1.49 % (2636221)Also succeeded, but the first one will report.
% 4.25/1.49 % (2636213)------------------------------
% 4.25/1.49 % (2636213)------------------------------
% 4.25/1.49 % (2636212)Refutation found. Thanks to Tanya!
% 4.25/1.49 % SZS status Theorem for theBenchmark
% 4.25/1.49 % SZS output start Proof for theBenchmark
% See solution above
% 4.25/1.49 % (2636212)------------------------------
% 4.25/1.49 % (2636212)Version: Vampire 5.0.1 (Release build, commit ea8961452 on 2026-07-16 15:14:34 +0200)
% 4.25/1.49 % (2636212)Linked with Z3 4.14.0.0 3c47fd96cf5645d0c42b2c819d9e9a84380aa721 z3-4.8.4-9178-g3c47fd96c
% 4.25/1.49 % (2636212)CaDiCaL version: 2.1.3
% 4.25/1.49 % (2636212)Termination reason: Refutation
% 4.25/1.49 % (2636212)Time elapsed: 0.021 s
% 4.25/1.49 % (2636212)Peak memory usage: 89 MB
% 4.25/1.49 % (2636212)Instructions burned: 34 (million)
% 4.25/1.49 % (2636212)------------------------------
% 4.25/1.49 % (2636212)------------------------------
% 4.25/1.49 % (2636202)Success in time 0.552 s
% 4.25/1.49 % Vampire exiting
%------------------------------------------------------------------------------