%------------------------------------------------------------------------------
% File : Vampire---5.0.1
% Problem : SET791+4 : TPTP v9.3.1. Released v3.2.0.
% 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 12:41:56 PM UTC 2026
% Result : Theorem 2.64s 1.35s
% Output : Refutation 2.64s
% Verified :
% SZS Type : Refutation
% Derivation depth : 18
% Number of leaves : 4
% Syntax : Number of formulae : 41 ( 6 unt; 0 def)
% Number of atoms : 202 ( 15 equ)
% Maximal formula atoms : 14 ( 4 avg)
% Number of connectives : 250 ( 89 ~; 87 |; 46 &)
% ( 4 <=>; 24 =>; 0 <=; 0 <~>)
% Maximal formula depth : 14 ( 7 avg)
% Maximal term depth : 2 ( 1 avg)
% Number of predicates : 7 ( 5 usr; 1 prp; 0-3 aty)
% Number of functors : 4 ( 4 usr; 3 con; 0-3 aty)
% Number of variables : 118 ( 110 !; 8 ?)
% Comments :
%------------------------------------------------------------------------------
fof(f1,axiom,
! [X0,X1] :
( order(X0,X1)
<=> ( ! [X2] :
( member(X2,X1)
=> apply(X0,X2,X2) )
& ! [X2,X3] :
( ( member(X2,X1)
& member(X3,X1) )
=> ( ( apply(X0,X2,X3)
& apply(X0,X3,X2) )
=> X2 = X3 ) )
& ! [X2,X3,X4] :
( ( member(X2,X1)
& member(X3,X1)
& member(X4,X1) )
=> ( ( apply(X0,X2,X3)
& apply(X0,X3,X4) )
=> apply(X0,X2,X4) ) ) ) ),
file('/export/starexec/sandbox/benchmark/theBenchmark.p',order) ).
fof(f5,axiom,
! [X0,X1,X2] :
( greatest(X2,X0,X1)
<=> ( member(X2,X1)
& ! [X3] :
( member(X3,X1)
=> apply(X0,X3,X2) ) ) ),
file('/export/starexec/sandbox/benchmark/theBenchmark.p',greatest) ).
fof(f7,axiom,
! [X0,X1,X2] :
( max(X2,X0,X1)
<=> ( member(X2,X1)
& ! [X3] :
( ( member(X3,X1)
& apply(X0,X2,X3) )
=> X2 = X3 ) ) ),
file('/export/starexec/sandbox/benchmark/theBenchmark.p',max) ).
fof(f11,conjecture,
! [X0,X1,X2] :
( ( order(X0,X1)
& greatest(X2,X0,X1) )
=> max(X2,X0,X1) ),
file('/export/starexec/sandbox/benchmark/theBenchmark.p',thIV3) ).
fof(f12,negated_conjecture,
~ ! [X0,X1,X2] :
( ( order(X0,X1)
& greatest(X2,X0,X1) )
=> max(X2,X0,X1) ),
inference(negated_conjecture,[status(cth)],[f11]) ).
fof(f13,plain,
! [X0,X1] :
( order(X0,X1)
<=> ( ! [X2] :
( member(X2,X1)
=> apply(X0,X2,X2) )
& ! [X3,X4] :
( ( member(X3,X1)
& member(X4,X1) )
=> ( ( apply(X0,X3,X4)
& apply(X0,X4,X3) )
=> X3 = X4 ) )
& ! [X5,X6,X7] :
( ( member(X5,X1)
& member(X6,X1)
& member(X7,X1) )
=> ( ( apply(X0,X5,X6)
& apply(X0,X6,X7) )
=> apply(X0,X5,X7) ) ) ) ),
inference(rectify,[],[f1]) ).
fof(f14,plain,
! [X0,X1,X2] :
( ( member(X2,X1)
& ! [X3] :
( ( member(X3,X1)
& apply(X0,X2,X3) )
=> X2 = X3 ) )
=> max(X2,X0,X1) ),
inference(unused_predicate_definition_removal,[],[f7]) ).
fof(f15,plain,
! [X0,X1,X2] :
( greatest(X2,X0,X1)
=> ( member(X2,X1)
& ! [X3] :
( member(X3,X1)
=> apply(X0,X3,X2) ) ) ),
inference(unused_predicate_definition_removal,[],[f5]) ).
fof(f16,plain,
! [X0,X1] :
( order(X0,X1)
=> ( ! [X2] :
( member(X2,X1)
=> apply(X0,X2,X2) )
& ! [X3,X4] :
( ( member(X3,X1)
& member(X4,X1) )
=> ( ( apply(X0,X3,X4)
& apply(X0,X4,X3) )
=> X3 = X4 ) )
& ! [X5,X6,X7] :
( ( member(X5,X1)
& member(X6,X1)
& member(X7,X1) )
=> ( ( apply(X0,X5,X6)
& apply(X0,X6,X7) )
=> apply(X0,X5,X7) ) ) ) ),
inference(unused_predicate_definition_removal,[],[f13]) ).
fof(f17,plain,
? [X0,X1,X2] :
( ~ max(X2,X0,X1)
& order(X0,X1)
& greatest(X2,X0,X1) ),
inference(ennf_transformation,[],[f12]) ).
fof(f18,plain,
? [X0,X1,X2] :
( ~ max(X2,X0,X1)
& order(X0,X1)
& greatest(X2,X0,X1) ),
inference(flattening,[],[f17]) ).
fof(f19,plain,
! [X0,X1] :
( ( ! [X2] :
( apply(X0,X2,X2)
| ~ member(X2,X1) )
& ! [X3,X4] :
( X3 = X4
| ~ apply(X0,X3,X4)
| ~ apply(X0,X4,X3)
| ~ member(X3,X1)
| ~ member(X4,X1) )
& ! [X5,X6,X7] :
( apply(X0,X5,X7)
| ~ apply(X0,X5,X6)
| ~ apply(X0,X6,X7)
| ~ member(X5,X1)
| ~ member(X6,X1)
| ~ member(X7,X1) ) )
| ~ order(X0,X1) ),
inference(ennf_transformation,[],[f16]) ).
fof(f20,plain,
! [X0,X1] :
( ( ! [X2] :
( apply(X0,X2,X2)
| ~ member(X2,X1) )
& ! [X3,X4] :
( X3 = X4
| ~ apply(X0,X3,X4)
| ~ apply(X0,X4,X3)
| ~ member(X3,X1)
| ~ member(X4,X1) )
& ! [X5,X6,X7] :
( apply(X0,X5,X7)
| ~ apply(X0,X5,X6)
| ~ apply(X0,X6,X7)
| ~ member(X5,X1)
| ~ member(X6,X1)
| ~ member(X7,X1) ) )
| ~ order(X0,X1) ),
inference(flattening,[],[f19]) ).
fof(f21,plain,
! [X0,X1,X2] :
( ( member(X2,X1)
& ! [X3] :
( apply(X0,X3,X2)
| ~ member(X3,X1) ) )
| ~ greatest(X2,X0,X1) ),
inference(ennf_transformation,[],[f15]) ).
fof(f22,plain,
! [X0,X1,X2] :
( max(X2,X0,X1)
| ~ member(X2,X1)
| ? [X3] :
( X2 != X3
& member(X3,X1)
& apply(X0,X2,X3) ) ),
inference(ennf_transformation,[],[f14]) ).
fof(f23,plain,
! [X0,X1,X2] :
( max(X2,X0,X1)
| ~ member(X2,X1)
| ? [X3] :
( X2 != X3
& member(X3,X1)
& apply(X0,X2,X3) ) ),
inference(flattening,[],[f22]) ).
fof(f24,plain,
( ~ max(sK2,sK0,sK1)
& order(sK0,sK1)
& greatest(sK2,sK0,sK1) ),
inference(skolemize,[status(esa),new_symbols(skolem,[sK0,sK1,sK2]),skolemize(X0,sK0),skolemize(X1,sK1),skolemize(X2,sK2)],[f18]) ).
fof(f25,plain,
! [X0,X1,X2] :
( max(X2,X0,X1)
| ~ member(X2,X1)
| ( sK3(X0,X1,X2) != X2
& member(sK3(X0,X1,X2),X1)
& apply(X0,X2,sK3(X0,X1,X2)) ) ),
inference(skolemize,[status(esa),new_symbols(skolem,[sK3]),skolemize(X3,sK3(X0,X1,X2))],[f23]) ).
fof(f26,plain,
greatest(sK2,sK0,sK1),
inference(cnf_transformation,[],[f24]) ).
fof(f27,plain,
order(sK0,sK1),
inference(cnf_transformation,[],[f24]) ).
fof(f28,plain,
~ max(sK2,sK0,sK1),
inference(cnf_transformation,[],[f24]) ).
fof(f30,plain,
! [X3,X0,X1,X4] :
( ~ apply(X0,X4,X3)
| ~ apply(X0,X3,X4)
| X3 = X4
| ~ member(X3,X1)
| ~ member(X4,X1)
| ~ order(X0,X1) ),
inference(cnf_transformation,[],[f20]) ).
fof(f32,plain,
! [X2,X3,X0,X1] :
( apply(X0,X3,X2)
| ~ member(X3,X1)
| ~ greatest(X2,X0,X1) ),
inference(cnf_transformation,[],[f21]) ).
fof(f33,plain,
! [X2,X0,X1] :
( ~ greatest(X2,X0,X1)
| member(X2,X1) ),
inference(cnf_transformation,[],[f21]) ).
fof(f34,plain,
! [X2,X0,X1] :
( apply(X0,X2,sK3(X0,X1,X2))
| ~ member(X2,X1)
| max(X2,X0,X1) ),
inference(cnf_transformation,[],[f25]) ).
fof(f35,plain,
! [X2,X0,X1] :
( member(sK3(X0,X1,X2),X1)
| ~ member(X2,X1)
| max(X2,X0,X1) ),
inference(cnf_transformation,[],[f25]) ).
fof(f36,plain,
! [X2,X0,X1] :
( sK3(X0,X1,X2) != X2
| ~ member(X2,X1)
| max(X2,X0,X1) ),
inference(cnf_transformation,[],[f25]) ).
fof(f37,plain,
member(sK2,sK1),
inference(resolution,[],[f33,f26]) ).
fof(f39,plain,
! [X2,X3,X0,X1,X4] :
( ~ greatest(X1,X0,X4)
| X1 = X2
| ~ member(X1,X3)
| ~ member(X2,X3)
| ~ order(X0,X3)
| ~ member(X2,X4)
| ~ apply(X0,X1,X2) ),
inference(resolution,[],[f30,f32]) ).
fof(f46,plain,
! [X0,X1] :
( ~ apply(sK0,sK2,X0)
| ~ member(sK2,X1)
| ~ member(X0,X1)
| ~ order(sK0,X1)
| ~ member(X0,sK1)
| sK2 = X0 ),
inference(resolution,[],[f39,f26]) ).
fof(f52,plain,
! [X0,X1] :
( ~ member(sK2,X0)
| ~ member(sK3(sK0,X1,sK2),X0)
| ~ order(sK0,X0)
| ~ member(sK3(sK0,X1,sK2),sK1)
| sK2 = sK3(sK0,X1,sK2)
| ~ member(sK2,X1)
| max(sK2,sK0,X1) ),
inference(resolution,[],[f46,f34]) ).
fof(f54,plain,
! [X0,X1] :
( ~ member(sK3(sK0,X1,sK2),sK1)
| ~ member(sK3(sK0,X1,sK2),X0)
| ~ order(sK0,X0)
| ~ member(sK2,X0)
| ~ member(sK2,X1)
| max(sK2,sK0,X1) ),
inference(forward_subsumption_resolution,[],[f52,f36]) ).
fof(f67,plain,
! [X0] :
( ~ member(sK3(sK0,sK1,sK2),X0)
| ~ order(sK0,X0)
| ~ member(sK2,X0)
| ~ member(sK2,sK1)
| max(sK2,sK0,sK1)
| ~ member(sK2,sK1)
| max(sK2,sK0,sK1) ),
inference(resolution,[],[f54,f35]) ).
fof(f69,plain,
! [X0] :
( ~ member(sK3(sK0,sK1,sK2),X0)
| ~ order(sK0,X0)
| ~ member(sK2,X0)
| ~ member(sK2,sK1)
| max(sK2,sK0,sK1) ),
inference(duplicate_literal_removal,[],[f67]) ).
fof(f71,plain,
! [X0] :
( ~ member(sK3(sK0,sK1,sK2),X0)
| ~ order(sK0,X0)
| ~ member(sK2,X0)
| max(sK2,sK0,sK1) ),
inference(forward_subsumption_resolution,[],[f69,f37]) ).
fof(f73,plain,
! [X0] :
( ~ member(sK3(sK0,sK1,sK2),X0)
| ~ order(sK0,X0)
| ~ member(sK2,X0) ),
inference(forward_subsumption_resolution,[],[f71,f28]) ).
fof(f79,plain,
( ~ order(sK0,sK1)
| ~ member(sK2,sK1)
| ~ member(sK2,sK1)
| max(sK2,sK0,sK1) ),
inference(resolution,[],[f73,f35]) ).
fof(f80,plain,
( ~ order(sK0,sK1)
| ~ member(sK2,sK1)
| max(sK2,sK0,sK1) ),
inference(duplicate_literal_removal,[],[f79]) ).
fof(f81,plain,
( ~ member(sK2,sK1)
| max(sK2,sK0,sK1) ),
inference(forward_subsumption_resolution,[],[f80,f27]) ).
fof(f82,plain,
max(sK2,sK0,sK1),
inference(forward_subsumption_resolution,[],[f81,f37]) ).
fof(f83,plain,
$false,
inference(forward_subsumption_resolution,[],[f82,f28]) ).
%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.00/0.03 % Problem : SET791+4 : TPTP v9.3.1. Released v3.2.0.
% 0.00/0.06 % Command : run_vampire /export/starexec/sandbox/benchmark/theBenchmark.p 300 THM
% 0.12/0.39 % Computer : n026.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 : Mon Sep 28 02:52:42 UTC 2026
% 0.12/0.39 % CPUTime :
% 0.12/0.39 Running run_vampire /export/starexec/sandbox/benchmark/theBenchmark.p 300 THM
% 0.12/0.43 Running first-order theorem proving
% 0.12/0.43 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
% 2.64/1.35 % (3426468)Detected formulas, will run a generic FOF schedule.
% 2.64/1.35 % (3426477)dis-1010_2:3_sil=16000:sp=reverse_frequency:random_seed=3657737454:i=119:av=off:ss=axioms_2999 on theBenchmark for (2999ds/119Mi)
% 2.64/1.35 % (3426477)First to succeed.
% 2.64/1.35 % (3426477)Solution written to "/export/starexec/sandbox/tmp/vampire-proof-3426468"
% 2.64/1.35 % (3426476)lrs+1010_1_to=lpo:sil=32000:sos=on:spb=goal_then_units:bce=on:random_seed=3818544108:i=109:sd=1:ins=1:gsp=on:ss=axioms_2999 on theBenchmark for (2999ds/109Mi)
% 2.64/1.35 % (3426476)Also succeeded, but the first one will report.
% 2.64/1.35 % (3426473)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=1869276799:i=141193_2999 on theBenchmark for (2999ds/141193Mi)
% 2.64/1.35 % (3426475)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=3717261890:i=141695:sd=1:nm=32:gsp=on:ss=included_2999 on theBenchmark for (2999ds/141695Mi)
% 2.64/1.35 % (3426474)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=925767901:i=134677:sd=20:aac=none:nm=16:ss=included:sgt=10_2999 on theBenchmark for (2999ds/134677Mi)
% 2.64/1.35 % (3426479)dis-21_1_sil=8000:lcm=predicate:random_seed=3839813345: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)
% 2.64/1.35 % (3426479)Also succeeded, but the first one will report.
% 2.64/1.35 % (3426478)dis-1011_1_sil=16000:fde=unused:s2agt=70:random_seed=2227141447:s2a=on:i=139:gtg=position_2999 on theBenchmark for (2999ds/139Mi)
% 2.64/1.35 % (3426478)Also succeeded, but the first one will report.
% 2.64/1.35 % (3426477)Refutation found. Thanks to Tanya!
% 2.64/1.35 % SZS status Theorem for theBenchmark
% 2.64/1.35 % SZS output start Proof for theBenchmark
% See solution above
% 2.64/1.36 % (3426477)------------------------------
% 2.64/1.36 % (3426477)Version: Vampire 5.0.1 (Release build, commit ea8961452 on 2026-07-16 15:14:34 +0200)
% 2.64/1.36 % (3426477)Linked with Z3 4.14.0.0 3c47fd96cf5645d0c42b2c819d9e9a84380aa721 z3-4.8.4-9178-g3c47fd96c
% 2.64/1.36 % (3426477)CaDiCaL version: 2.1.3
% 2.64/1.36 % (3426477)Termination reason: Refutation
% 2.64/1.36 % (3426477)Time elapsed: 0.002 s
% 2.64/1.36 % (3426477)Peak memory usage: 88 MB
% 2.64/1.36 % (3426477)Instructions burned: 4 (million)
% 2.64/1.36 % (3426477)------------------------------
% 2.64/1.36 % (3426477)------------------------------
% 2.64/1.36 % (3426468)Success in time 0.288 s
% 2.64/1.36 % Vampire exiting
%------------------------------------------------------------------------------