%------------------------------------------------------------------------------
% File : Vampire---5.0.1
% Problem : SYN978+1 : TPTP v9.3.1. Released v3.1.0.
% Transfm : none
% Format : tptp:raw
% Command : run_vampire /export/starexec/sandbox/benchmark/theBenchmark.p 300 THM
% Computer : n019.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 02:06:06 PM UTC 2026
% Result : Theorem 0.20s 1.13s
% Output : Refutation 0.20s
% Verified :
% SZS Type : Refutation
% Derivation depth : 8
% Number of leaves : 1
% Syntax : Number of formulae : 11 ( 4 unt; 0 def)
% Number of atoms : 34 ( 0 equ)
% Maximal formula atoms : 6 ( 3 avg)
% Number of connectives : 31 ( 8 ~; 5 |; 12 &)
% ( 2 <=>; 2 =>; 0 <=; 2 <~>)
% Maximal formula depth : 6 ( 3 avg)
% Maximal term depth : 0 ( 0 avg)
% Number of predicates : 3 ( 2 usr; 3 prp; 0-0 aty)
% Number of functors : 0 ( 0 usr; 0 con; --- aty)
% Number of variables : 0 ( 0 !; 0 ?)
% Comments :
%------------------------------------------------------------------------------
fof(f1,conjecture,
( ( a
& b )
=> ( a
<=> b ) ),
file('/export/starexec/sandbox/benchmark/theBenchmark.p',prove_this) ).
fof(f2,negated_conjecture,
~ ( ( a
& b )
=> ( a
<=> b ) ),
inference(negated_conjecture,[status(cth)],[f1]) ).
fof(f3,plain,
( ( a
<~> b )
& a
& b ),
inference(ennf_transformation,[],[f2]) ).
fof(f4,plain,
( ( a
<~> b )
& a
& b ),
inference(flattening,[],[f3]) ).
fof(f5,plain,
( ( ~ b
| ~ a )
& ( b
| a )
& a
& b ),
inference(nnf_transformation,[],[f4]) ).
fof(f6,plain,
( ( ~ b
| ~ a )
& ( b
| a )
& a
& b ),
inference(flattening,[],[f5]) ).
fof(f7,plain,
b,
inference(cnf_transformation,[],[f6]) ).
fof(f8,plain,
a,
inference(cnf_transformation,[],[f6]) ).
fof(f10,plain,
( ~ b
| ~ a ),
inference(cnf_transformation,[],[f6]) ).
fof(f11,plain,
~ a,
inference(forward_subsumption_resolution,[],[f10,f7]) ).
fof(f12,plain,
$false,
inference(forward_subsumption_resolution,[],[f11,f8]) ).
%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.00/0.03 % Problem : SYN978+1 : TPTP v9.3.1. Released v3.1.0.
% 0.00/0.06 % Command : run_vampire /export/starexec/sandbox/benchmark/theBenchmark.p 300 THM
% 0.09/0.19 % Computer : n019.cluster.edu
% 0.09/0.19 % Model : x86_64 x86_64
% 0.09/0.19 % CPU : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz
% 0.09/0.19 % Memory : 8046.5625MB
% 0.09/0.19 % OS : Linux 6.8.0-71-generic
% 0.09/0.19 % CPULimit : 300
% 0.09/0.19 % WCLimit : 300
% 0.09/0.19 % DateTime : Mon Sep 28 17:19:24 UTC 2026
% 0.09/0.20 % CPUTime :
% 0.09/0.20 Running run_vampire /export/starexec/sandbox/benchmark/theBenchmark.p 300 THM
% 0.09/0.23 Running first-order theorem proving
% 0.09/0.23 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
% 0.20/1.13 % (4170846)Detected formulas, will run a generic FOF schedule.
% 0.20/1.13 % (4170916)dis-1010_2:3_sil=16000:sp=reverse_frequency:random_seed=771341785:i=119:av=off:ss=axioms_3000 on theBenchmark for (3000ds/119Mi)
% 0.20/1.13 % (4170916)First to succeed.
% 0.20/1.13 % (4170916)Solution written to "/export/starexec/sandbox/tmp/vampire-proof-4170846"
% 0.20/1.13 % (4170912)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=1183253213:i=141193_3000 on theBenchmark for (3000ds/141193Mi)
% 0.20/1.13 % (4170914)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=3803409850:i=141695:sd=1:nm=32:gsp=on:ss=included_3000 on theBenchmark for (3000ds/141695Mi)
% 0.20/1.13 % (4170913)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=51612794:i=134677:sd=20:aac=none:nm=16:ss=included:sgt=10_3000 on theBenchmark for (3000ds/134677Mi)
% 0.20/1.13 % (4170915)lrs+1010_1_to=lpo:sil=32000:sos=on:spb=goal_then_units:bce=on:random_seed=2949157137:i=109:sd=1:ins=1:gsp=on:ss=axioms_3000 on theBenchmark for (3000ds/109Mi)
% 0.20/1.13 % (4170915)Also succeeded, but the first one will report.
% 0.20/1.13 % (4170917)dis-1011_1_sil=16000:fde=unused:s2agt=70:random_seed=2122257894:s2a=on:i=139:gtg=position_3000 on theBenchmark for (3000ds/139Mi)
% 0.20/1.13 % (4170918)dis-21_1_sil=8000:lcm=predicate:random_seed=155011936:st=5:avsq=on:i=129:avsqr=1,16:sd=3:aac=none:ep=RS:fsr=off:ss=included_3000 on theBenchmark for (3000ds/129Mi)
% 0.20/1.13 % (4170918)Also succeeded, but the first one will report.
% 0.20/1.13 % (4170917)Also succeeded, but the first one will report.
% 0.20/1.13 % (4170916)Refutation found. Thanks to Tanya!
% 0.20/1.13 % SZS status Theorem for theBenchmark
% 0.20/1.13 % SZS output start Proof for theBenchmark
% See solution above
% 0.20/1.13 % (4170916)------------------------------
% 0.20/1.13 % (4170916)Version: Vampire 5.0.1 (Release build, commit ea8961452 on 2026-07-16 15:14:34 +0200)
% 0.20/1.13 % (4170916)Linked with Z3 4.14.0.0 3c47fd96cf5645d0c42b2c819d9e9a84380aa721 z3-4.8.4-9178-g3c47fd96c
% 0.20/1.13 % (4170916)CaDiCaL version: 2.1.3
% 0.20/1.13 % (4170916)Termination reason: Refutation
% 0.20/1.13 % (4170916)Time elapsed: 0.001 s
% 0.20/1.13 % (4170916)Peak memory usage: 87 MB
% 0.20/1.13 % (4170916)------------------------------
% 0.20/1.13 % (4170916)------------------------------
% 0.20/1.13 % (4170846)Success in time 0.263 s
% 0.20/1.13 % Vampire exiting
%------------------------------------------------------------------------------