%------------------------------------------------------------------------------
% File : Vampire---5.0.1
% Problem : LCL076-2 : TPTP v9.3.1. Released v1.0.0.
% Transfm : none
% Format : tptp:raw
% Command : run_vampire /export/starexec/sandbox/benchmark/theBenchmark.p 300 THM
% Computer : n012.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 11:51:07 AM UTC 2026
% Result : Unsatisfiable 2.17s 0.93s
% Output : Refutation 2.17s
% Verified :
% SZS Type : Refutation
% Derivation depth : 3
% Number of leaves : 4
% Syntax : Number of formulae : 7 ( 5 unt; 0 def)
% Number of atoms : 10 ( 0 equ)
% Maximal formula atoms : 3 ( 1 avg)
% Number of connectives : 7 ( 4 ~; 3 |; 0 &)
% ( 0 <=>; 0 =>; 0 <=; 0 <~>)
% Maximal formula depth : 6 ( 3 avg)
% Maximal term depth : 4 ( 2 avg)
% Number of predicates : 2 ( 1 usr; 1 prp; 0-1 aty)
% Number of functors : 3 ( 3 usr; 1 con; 0-2 aty)
% Number of variables : 8 ( 8 !; 0 ?)
% Comments :
%------------------------------------------------------------------------------
fof(f1,axiom,
! [X0,X1] :
( ~ is_a_theorem(implies(X0,X1))
| ~ is_a_theorem(X0)
| is_a_theorem(X1) ),
file('/export/starexec/sandbox/benchmark/theBenchmark.p',condensed_detachment) ).
fof(f4,axiom,
! [X0,X1] : is_a_theorem(implies(implies(not(X0),not(X1)),implies(X1,X0))),
file('/export/starexec/sandbox/benchmark/theBenchmark.p',cn_49) ).
fof(f5,axiom,
! [X0] : is_a_theorem(implies(not(not(X0)),X0)),
file('/export/starexec/sandbox/benchmark/theBenchmark.p',extra_lemma) ).
fof(f6,negated_conjecture,
~ is_a_theorem(implies(a,not(not(a)))),
file('/export/starexec/sandbox/benchmark/theBenchmark.p',prove_cn_40) ).
fof(f11,plain,
! [X0,X1] :
( ~ is_a_theorem(implies(not(X0),not(X1)))
| is_a_theorem(implies(X1,X0)) ),
inference(resolution,[],[f4,f1]) ).
fof(f13,plain,
! [X0] : is_a_theorem(implies(X0,not(not(X0)))),
inference(resolution,[],[f11,f5]) ).
fof(f15,plain,
$false,
inference(resolution,[],[f13,f6]) ).
%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.00/0.01 % Problem : LCL076-2 : TPTP v9.3.1. Released v1.0.0.
% 0.00/0.03 % Command : run_vampire /export/starexec/sandbox/benchmark/theBenchmark.p 300 THM
% 0.05/0.30 % Computer : n012.cluster.edu
% 0.05/0.30 % Model : x86_64 x86_64
% 0.05/0.30 % CPU : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz
% 0.05/0.30 % Memory : 8046.5625MB
% 0.05/0.30 % OS : Linux 6.8.0-71-generic
% 0.05/0.30 % CPULimit : 300
% 0.05/0.30 % WCLimit : 300
% 0.05/0.30 % DateTime : Sun Sep 27 15:20:34 UTC 2026
% 0.05/0.30 % CPUTime :
% 0.05/0.30 Running run_vampire /export/starexec/sandbox/benchmark/theBenchmark.p 300 THM
% 0.05/0.32 Running first-order theorem proving
% 0.05/0.32 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
% 2.17/0.93 % (2500811)Input is clausal, will run a generic CNF schedule.
% 2.17/0.93 % (2500833)dis-1002_1_to=lpo:sil=16000:fd=off:random_seed=1816070504:st=1.5:i=114:aac=none:ins=7:ss=axioms:fsd=on_2999 on theBenchmark for (2999ds/114Mi)
% 2.17/0.93 % (2500833)First to succeed.
% 2.17/0.93 % (2500833)Solution written to "/export/starexec/sandbox/tmp/vampire-proof-2500811"
% 2.17/0.93 % (2500835)dis-21_1_sil=8000:lcm=predicate:random_seed=2086000878: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)
% 2.17/0.93 % (2500831)lrs+1002_1_ncem=casc2026/models/loop8.pt:sil=128000:tgt=ground:npcc=on:sp=reverse_frequency:spb=intro:random_seed=693073649:i=137899:s2at=10:gtgl=3:kws=precedence:add=on:bd=preordered:gtg=position_2999 on theBenchmark for (2999ds/137899Mi)
% 2.17/0.93 % (2500830)lrs+10_1_ncem=casc2026/models/loop8.pt:sil=128000:npcc=on:urr=on:br=off:random_seed=2605244149:i=132376:av=off_2999 on theBenchmark for (2999ds/132376Mi)
% 2.17/0.93 % (2500835)Also succeeded, but the first one will report.
% 2.17/0.93 % (2500829)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=1324404127:i=140167_2999 on theBenchmark for (2999ds/140167Mi)
% 2.17/0.93 % (2500834)dis-1011_1_sil=16000:fde=unused:s2agt=70:random_seed=4141557830:s2a=on:i=180:gtg=position_2999 on theBenchmark for (2999ds/180Mi)
% 2.17/0.93 % (2500832)lrs+10_1_sil=8000:sp=occurrence:random_seed=1554282666:i=107:sd=3:ss=axioms:sgt=8_2999 on theBenchmark for (2999ds/107Mi)
% 2.17/0.93 % (2500834)Also succeeded, but the first one will report.
% 2.17/0.93 % (2500832)Also succeeded, but the first one will report.
% 2.17/0.93 % (2500833)Refutation found. Thanks to Tanya!
% 2.17/0.93 % SZS status Unsatisfiable for theBenchmark
% 2.17/0.93 % SZS output start Proof for theBenchmark
% See solution above
% 2.17/0.93 % (2500833)------------------------------
% 2.17/0.93 % (2500833)Version: Vampire 5.0.1 (Release build, commit ea8961452 on 2026-07-16 15:14:34 +0200)
% 2.17/0.93 % (2500833)Linked with Z3 4.14.0.0 3c47fd96cf5645d0c42b2c819d9e9a84380aa721 z3-4.8.4-9178-g3c47fd96c
% 2.17/0.93 % (2500833)CaDiCaL version: 2.1.3
% 2.17/0.93 % (2500833)Termination reason: Refutation
% 2.17/0.93 % (2500833)Time elapsed: 0.001 s
% 2.17/0.93 % (2500833)Peak memory usage: 88 MB
% 2.17/0.93 % (2500833)------------------------------
% 2.17/0.93 % (2500833)------------------------------
% 2.17/0.93 % (2500811)Success in time 0.271 s
% 2.17/0.93 % Vampire exiting
%------------------------------------------------------------------------------