%------------------------------------------------------------------------------
% File : Vampire---5.0.1
% Problem : SYN073-1 : 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 : n015.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 01:49:14 PM UTC 2026
% Result : Unsatisfiable 2.75s 1.16s
% Output : Refutation 2.75s
% Verified :
% SZS Type : Refutation
% Derivation depth : 2
% Number of leaves : 2
% Syntax : Number of formulae : 4 ( 3 unt; 0 def)
% Number of atoms : 5 ( 0 equ)
% Maximal formula atoms : 2 ( 1 avg)
% Number of connectives : 2 ( 1 ~; 1 |; 0 &)
% ( 0 <=>; 0 =>; 0 <=; 0 <~>)
% Maximal formula depth : 4 ( 3 avg)
% Maximal term depth : 2 ( 1 avg)
% Number of predicates : 2 ( 1 usr; 1 prp; 0-2 aty)
% Number of functors : 2 ( 2 usr; 1 con; 0-1 aty)
% Number of variables : 4 ( 4 !; 0 ?)
% Comments :
%------------------------------------------------------------------------------
fof(f1,negated_conjecture,
! [X0,X1] :
( big_f(a,X0)
| big_f(X0,X1) ),
file('/export/starexec/sandbox2/benchmark/theBenchmark.p',clause_1) ).
fof(f2,negated_conjecture,
! [X0] : ~ big_f(X0,f(X0)),
file('/export/starexec/sandbox2/benchmark/theBenchmark.p',prove_this) ).
fof(f3,plain,
! [X0] : big_f(f(a),X0),
inference(resolution,[],[f1,f2]) ).
fof(f4,plain,
$false,
inference(resolution,[],[f3,f2]) ).
%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.00/0.03 % Problem : SYN073-1 : TPTP v9.3.1. Released v1.0.0.
% 0.00/0.06 % Command : run_vampire /export/starexec/sandbox2/benchmark/theBenchmark.p 300 THM
% 0.11/0.20 % Computer : n015.cluster.edu
% 0.11/0.20 % Model : x86_64 x86_64
% 0.11/0.20 % CPU : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz
% 0.11/0.20 % Memory : 8046.5625MB
% 0.11/0.20 % OS : Linux 6.8.0-71-generic
% 0.11/0.20 % CPULimit : 300
% 0.11/0.20 % WCLimit : 300
% 0.11/0.20 % DateTime : Mon Sep 28 15:35:32 UTC 2026
% 0.11/0.20 % CPUTime :
% 0.11/0.20 Running run_vampire /export/starexec/sandbox2/benchmark/theBenchmark.p 300 THM
% 0.11/0.24 Running first-order theorem proving
% 0.11/0.24 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
% 2.75/1.16 % (2717264)Input is clausal, will run a generic CNF schedule.
% 2.75/1.16 % (2717351)dis-1002_1_to=lpo:sil=16000:fd=off:random_seed=3313955373:st=1.5:i=114:aac=none:ins=7:ss=axioms:fsd=on_3000 on theBenchmark for (3000ds/114Mi)
% 2.75/1.16 % (2717351)First to succeed.
% 2.75/1.16 % (2717351)Solution written to "/export/starexec/sandbox2/tmp/vampire-proof-2717264"
% 2.75/1.16 % (2717349)lrs+1002_1_ncem=casc2026/models/loop8.pt:sil=128000:tgt=ground:npcc=on:sp=reverse_frequency:spb=intro:random_seed=2928965927:i=137899:s2at=10:gtgl=3:kws=precedence:add=on:bd=preordered:gtg=position_3000 on theBenchmark for (3000ds/137899Mi)
% 2.75/1.16 % (2717353)dis-1011_1_sil=16000:fde=unused:s2agt=70:random_seed=2979425064:s2a=on:i=180:gtg=position_3000 on theBenchmark for (3000ds/180Mi)
% 2.75/1.16 % (2717354)dis-21_1_sil=8000:lcm=predicate:random_seed=766764989:st=5:avsq=on:i=117:avsqr=1,16:sd=3:aac=none:ep=RS:fsr=off:ss=included_3000 on theBenchmark for (3000ds/117Mi)
% 2.75/1.16 % (2717350)lrs+10_1_sil=8000:sp=occurrence:random_seed=1832356434:i=107:sd=3:ss=axioms:sgt=8_3000 on theBenchmark for (3000ds/107Mi)
% 2.75/1.16 % (2717346)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=3783296188:i=140167_3000 on theBenchmark for (3000ds/140167Mi)
% 2.75/1.16 % (2717347)lrs+10_1_ncem=casc2026/models/loop8.pt:sil=128000:npcc=on:urr=on:br=off:random_seed=3210239358:i=132376:av=off_3000 on theBenchmark for (3000ds/132376Mi)
% 2.75/1.16 % (2717354)Also succeeded, but the first one will report.
% 2.75/1.16 % (2717353)Also succeeded, but the first one will report.
% 2.75/1.16 % (2717350)Also succeeded, but the first one will report.
% 2.75/1.16 % (2717351)Refutation found. Thanks to Tanya!
% 2.75/1.16 % SZS status Unsatisfiable for theBenchmark
% 2.75/1.16 % SZS output start Proof for theBenchmark
% See solution above
% 2.75/1.16 % (2717351)------------------------------
% 2.75/1.16 % (2717351)Version: Vampire 5.0.1 (Release build, commit ea8961452 on 2026-07-16 15:14:34 +0200)
% 2.75/1.16 % (2717351)Linked with Z3 4.14.0.0 3c47fd96cf5645d0c42b2c819d9e9a84380aa721 z3-4.8.4-9178-g3c47fd96c
% 2.75/1.16 % (2717351)CaDiCaL version: 2.1.3
% 2.75/1.16 % (2717351)Termination reason: Refutation
% 2.75/1.16 % (2717351)Time elapsed: 0.001 s
% 2.75/1.16 % (2717351)Peak memory usage: 87 MB
% 2.75/1.16 % (2717351)------------------------------
% 2.75/1.16 % (2717351)------------------------------
% 2.75/1.16 % (2717264)Success in time 0.288 s
% 2.75/1.16 % Vampire exiting
%------------------------------------------------------------------------------