%------------------------------------------------------------------------------
% File : Vampire-SAT---5.0.1
% Problem : SYN081-1 : TPTP v9.3.1. Released v1.0.0.
% Transfm : none
% Format : tptp:raw
% Command : run_vampire /export/starexec/sandbox2/benchmark/theBenchmark.p 300 SAT
% 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 02:06:43 PM UTC 2026
% Result : Unsatisfiable 0.08s 0.26s
% Output : Refutation 0.08s
% Verified :
% SZS Type : Refutation
% Derivation depth : 4
% Number of leaves : 3
% Syntax : Number of formulae : 9 ( 3 unt; 0 def)
% Number of atoms : 15 ( 0 equ)
% Maximal formula atoms : 2 ( 1 avg)
% Number of connectives : 13 ( 7 ~; 6 |; 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; 0-1 aty)
% Number of functors : 1 ( 1 usr; 0 con; 1-1 aty)
% Number of variables : 8 ( 8 !; 0 ?)
% Comments :
%------------------------------------------------------------------------------
fof(f1,axiom,
! [X0] :
( ~ big_f(X0)
| ~ big_f(f(X0)) ),
file('/export/starexec/sandbox2/benchmark/theBenchmark.p',clause_1) ).
fof(f2,axiom,
! [X0] :
( big_f(f(X0))
| big_f(X0) ),
file('/export/starexec/sandbox2/benchmark/theBenchmark.p',clause_2) ).
fof(f3,negated_conjecture,
! [X0] :
( ~ big_f(X0)
| big_f(f(X0)) ),
file('/export/starexec/sandbox2/benchmark/theBenchmark.p',prove_this) ).
fof(f4,plain,
! [X0] :
( big_f(X0)
| big_f(f(X0)) ),
inference(consistent_polarity_flipping,[],[f1]) ).
fof(f5,plain,
! [X0] :
( ~ big_f(f(X0))
| ~ big_f(X0) ),
inference(consistent_polarity_flipping,[],[f2]) ).
fof(f6,plain,
! [X0] :
( ~ big_f(f(X0))
| big_f(X0) ),
inference(consistent_polarity_flipping,[],[f3]) ).
fof(f7,plain,
! [X0] : big_f(X0),
inference(forward_subsumption_resolution,[],[f4,f6]) ).
fof(f9,plain,
! [X0] : ~ big_f(X0),
inference(forward_subsumption_resolution,[],[f5,f7]) ).
fof(f10,plain,
$false,
inference(forward_subsumption_resolution,[],[f9,f7]) ).
%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.00/0.03 % Problem : SYN081-1 : TPTP v9.3.1. Released v1.0.0.
% 0.00/0.05 % Command : run_vampire /export/starexec/sandbox2/benchmark/theBenchmark.p 300 SAT
% 0.08/0.18 % Computer : n002.cluster.edu
% 0.08/0.18 % Model : x86_64 x86_64
% 0.08/0.18 % CPU : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz
% 0.08/0.18 % Memory : 8046.5625MB
% 0.08/0.18 % OS : Linux 6.8.0-71-generic
% 0.08/0.19 % CPULimit : 300
% 0.08/0.19 % WCLimit : 300
% 0.08/0.19 % DateTime : Mon Sep 28 15:35:07 UTC 2026
% 0.08/0.19 % CPUTime :
% 0.08/0.19 Running run_vampire /export/starexec/sandbox2/benchmark/theBenchmark.p 300 SAT
% 0.08/0.22 Running first-order model finding
% 0.08/0.22 Running: /export/starexec/sandbox2/solver/bin/vampire-ho --input_syntax tptp --output_axiom_names on --mode casc --intent sat -m 16384 --cores 7 -t 300 /export/starexec/sandbox2/benchmark/theBenchmark.p
% 0.08/0.26 % (453265)Will run a generic schedule for satisfiability detection.
% 0.08/0.26 % (453271)% WARNING: option uhcvi not known.
% 0.08/0.26 % (453271)dis+11_61:31_drc=ordering:lsd=5:bsr=unit_only:rp=on:newcnf=on:random_seed=3406639518:i=135531:add=off:rawr=on_2999 on theBenchmark for (2999ds/135531Mi)
% 0.08/0.26 % (453271) found proof, printing to "/export/starexec/sandbox2/tmp/vampire-proof-453265-453271"...
% 0.08/0.26 % (453271)...printing done.
% 0.08/0.26 % (453271)Refutation found. Thanks to Tanya!
% 0.08/0.26 % SZS status Unsatisfiable for theBenchmark
% 0.08/0.26 % SZS output start Proof for theBenchmark
% See solution above
% 0.08/0.26 % (453271)------------------------------
% 0.08/0.26 % (453271)Version: Vampire 5.0.1 (Release build, commit 5ef7c2677 on 2026-07-16 16:54:09 +0200)
% 0.08/0.26 % (453271)Linked with Z3 4.14.0.0 3c47fd96cf5645d0c42b2c819d9e9a84380aa721 z3-4.8.4-9178-g3c47fd96c
% 0.08/0.26 % (453271)CaDiCaL version: 2.1.3
% 0.08/0.26 % (453271)Termination reason: Refutation
% 0.08/0.26 % (453271)Time elapsed: 0.0000 s
% 0.08/0.26 % (453271)Peak memory usage: 11 MB
% 0.08/0.26 % (453265)Success in time 0.031 s
% 0.08/0.26 % Vampire exiting
%------------------------------------------------------------------------------