%------------------------------------------------------------------------------
% File : Vampire---5.0.1
% Problem : SYN048+1 : TPTP v9.3.1. Released v2.0.0.
% Transfm : none
% Format : tptp:raw
% Command : run_vampire /export/starexec/sandbox/benchmark/theBenchmark.p 300 THM
% Computer : n002.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 01:49:06 PM UTC 2026
% Result : Theorem 2.36s 0.79s
% Output : Refutation 2.36s
% Verified :
% SZS Type : Refutation
% Derivation depth : 5
% Number of leaves : 1
% Syntax : Number of formulae : 7 ( 3 unt; 0 def)
% Number of atoms : 11 ( 0 equ)
% Maximal formula atoms : 2 ( 1 avg)
% Number of connectives : 8 ( 4 ~; 0 |; 2 &)
% ( 0 <=>; 2 =>; 0 <=; 0 <~>)
% Maximal formula depth : 5 ( 3 avg)
% Maximal term depth : 2 ( 1 avg)
% Number of predicates : 2 ( 1 usr; 1 prp; 0-1 aty)
% Number of functors : 1 ( 1 usr; 0 con; 1-1 aty)
% Number of variables : 9 ( 6 !; 3 ?)
% Comments :
%------------------------------------------------------------------------------
fof(f1,conjecture,
? [X0] :
! [X1] :
( big_f(X0)
=> big_f(X1) ),
file('/export/starexec/sandbox/benchmark/theBenchmark.p',pel18) ).
fof(f2,negated_conjecture,
~ ? [X0] :
! [X1] :
( big_f(X0)
=> big_f(X1) ),
inference(negated_conjecture,[status(cth)],[f1]) ).
fof(f3,plain,
! [X0] :
? [X1] :
( ~ big_f(X1)
& big_f(X0) ),
inference(ennf_transformation,[],[f2]) ).
fof(f4,plain,
! [X0] :
( ~ big_f(sK0(X0))
& big_f(X0) ),
inference(skolemize,[status(esa),new_symbols(skolem,[sK0]),skolemize(X1,sK0(X0))],[f3]) ).
fof(f5,plain,
! [X0] : big_f(X0),
inference(cnf_transformation,[],[f4]) ).
fof(f6,plain,
! [X0] : ~ big_f(sK0(X0)),
inference(cnf_transformation,[],[f4]) ).
fof(f7,plain,
$false,
inference(resolution,[],[f6,f5]) ).
%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.00/0.02 % Problem : SYN048+1 : TPTP v9.3.1. Released v2.0.0.
% 0.00/0.04 % Command : run_vampire /export/starexec/sandbox/benchmark/theBenchmark.p 300 THM
% 0.10/0.16 % Computer : n002.cluster.edu
% 0.10/0.16 % Model : x86_64 x86_64
% 0.10/0.16 % CPU : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz
% 0.10/0.16 % Memory : 8046.5625MB
% 0.10/0.16 % OS : Linux 6.8.0-71-generic
% 0.10/0.16 % CPULimit : 300
% 0.10/0.16 % WCLimit : 300
% 0.10/0.16 % DateTime : Mon Sep 28 15:27:37 UTC 2026
% 0.10/0.16 % CPUTime :
% 0.10/0.16 Running run_vampire /export/starexec/sandbox/benchmark/theBenchmark.p 300 THM
% 0.10/0.19 Running first-order theorem proving
% 0.10/0.19 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
% 2.36/0.79 % (448720)Detected formulas, will run a generic FOF schedule.
% 2.36/0.79 % (448731)dis-21_1_sil=8000:lcm=predicate:random_seed=1357770489: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)
% 2.36/0.79 % (448731)First to succeed.
% 2.36/0.79 % (448731)Solution written to "/export/starexec/sandbox/tmp/vampire-proof-448720"
% 2.36/0.79 % (448725)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=3465778588:i=141193_2999 on theBenchmark for (2999ds/141193Mi)
% 2.36/0.79 % (448727)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=2655518138:i=141695:sd=1:nm=32:gsp=on:ss=included_2999 on theBenchmark for (2999ds/141695Mi)
% 2.36/0.79 % (448730)dis-1011_1_sil=16000:fde=unused:s2agt=70:random_seed=1655879582:s2a=on:i=139:gtg=position_2999 on theBenchmark for (2999ds/139Mi)
% 2.36/0.79 % (448726)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=2464030509:i=134677:sd=20:aac=none:nm=16:ss=included:sgt=10_2999 on theBenchmark for (2999ds/134677Mi)
% 2.36/0.79 % (448729)dis-1010_2:3_sil=16000:sp=reverse_frequency:random_seed=756451406:i=119:av=off:ss=axioms_2999 on theBenchmark for (2999ds/119Mi)
% 2.36/0.79 % (448728)lrs+1010_1_to=lpo:sil=32000:sos=on:spb=goal_then_units:bce=on:random_seed=2392012697:i=109:sd=1:ins=1:gsp=on:ss=axioms_2999 on theBenchmark for (2999ds/109Mi)
% 2.36/0.79 % (448729)Also succeeded, but the first one will report.
% 2.36/0.79 % (448728)Also succeeded, but the first one will report.
% 2.36/0.79 % (448730)Also succeeded, but the first one will report.
% 2.36/0.79 % (448731)Refutation found. Thanks to Tanya!
% 2.36/0.79 % SZS status Theorem for theBenchmark
% 2.36/0.79 % SZS output start Proof for theBenchmark
% See solution above
% 2.36/0.79 % (448731)------------------------------
% 2.36/0.79 % (448731)Version: Vampire 5.0.1 (Release build, commit ea8961452 on 2026-07-16 15:14:34 +0200)
% 2.36/0.79 % (448731)Linked with Z3 4.14.0.0 3c47fd96cf5645d0c42b2c819d9e9a84380aa721 z3-4.8.4-9178-g3c47fd96c
% 2.36/0.79 % (448731)CaDiCaL version: 2.1.3
% 2.36/0.79 % (448731)Termination reason: Refutation
% 2.36/0.79 % (448731)Time elapsed: 0.001 s
% 2.36/0.79 % (448731)Peak memory usage: 88 MB
% 2.36/0.79 % (448731)------------------------------
% 2.36/0.79 % (448731)------------------------------
% 2.36/0.79 % (448720)Success in time 0.3 s
% 2.36/0.79 % Vampire exiting
%------------------------------------------------------------------------------