%------------------------------------------------------------------------------
% File : Vampire---5.0.1
% Problem : NUM025-1 : TPTP v9.3.1. Bugfixed v4.0.0.
% Transfm : none
% Format : tptp:raw
% Command : run_vampire /export/starexec/sandbox2/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 12:11:36 PM UTC 2026
% Result : Unsatisfiable 3.46s 1.45s
% Output : Refutation 3.46s
% 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 : 7 ( 3 avg)
% Maximal term depth : 1 ( 1 avg)
% Number of predicates : 2 ( 1 usr; 1 prp; 0-2 aty)
% Number of functors : 2 ( 2 usr; 2 con; 0-0 aty)
% Number of variables : 5 ( 5 !; 0 ?)
% Comments :
%------------------------------------------------------------------------------
fof(f7,axiom,
! [X2,X0,X1] :
( ~ less(X2,X0)
| ~ less(X0,X1)
| less(X2,X1) ),
file('/export/starexec/sandbox2/benchmark/theBenchmark.p',transitivity_of_less) ).
fof(f14,axiom,
! [X0] : ~ less(X0,X0),
file('/export/starexec/sandbox2/benchmark/theBenchmark.p',no_number_less_than_itself) ).
fof(f15,axiom,
less(a,b),
file('/export/starexec/sandbox2/benchmark/theBenchmark.p',a_less_than_b) ).
fof(f16,negated_conjecture,
less(b,a),
file('/export/starexec/sandbox2/benchmark/theBenchmark.p',prove_b_not_less_than_a) ).
fof(f28,plain,
! [X0] :
( ~ less(a,X0)
| less(b,X0) ),
inference(resolution,[],[f7,f16]) ).
fof(f34,plain,
less(b,b),
inference(resolution,[],[f28,f15]) ).
fof(f35,plain,
$false,
inference(forward_subsumption_resolution,[],[f34,f14]) ).
%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.00/0.03 % Problem : NUM025-1 : TPTP v9.3.1. Bugfixed v4.0.0.
% 0.00/0.06 % Command : run_vampire /export/starexec/sandbox2/benchmark/theBenchmark.p 300 THM
% 0.12/0.37 % Computer : n002.cluster.edu
% 0.12/0.37 % Model : x86_64 x86_64
% 0.12/0.37 % CPU : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz
% 0.12/0.37 % Memory : 8046.5625MB
% 0.12/0.37 % OS : Linux 6.8.0-71-generic
% 0.12/0.37 % CPULimit : 300
% 0.12/0.37 % WCLimit : 300
% 0.12/0.37 % DateTime : Sun Sep 27 18:42:52 UTC 2026
% 0.12/0.37 % CPUTime :
% 0.12/0.37 Running run_vampire /export/starexec/sandbox2/benchmark/theBenchmark.p 300 THM
% 0.12/0.41 Running first-order theorem proving
% 0.12/0.41 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
% 3.46/1.45 % (3809558)Input is clausal, will run a generic CNF schedule.
% 3.46/1.45 % (3809564)lrs+10_1_ncem=casc2026/models/loop8.pt:sil=128000:npcc=on:urr=on:br=off:random_seed=3674645895:i=132376:av=off_2999 on theBenchmark for (2999ds/132376Mi)
% 3.46/1.45 % (3809566)lrs+10_1_sil=8000:sp=occurrence:random_seed=992071280:i=107:sd=3:ss=axioms:sgt=8_2999 on theBenchmark for (2999ds/107Mi)
% 3.46/1.45 % (3809569)dis-21_1_sil=8000:lcm=predicate:random_seed=1925475412: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)
% 3.46/1.45 % (3809563)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=2997215545:i=140167_2999 on theBenchmark for (2999ds/140167Mi)
% 3.46/1.45 % (3809568)dis-1011_1_sil=16000:fde=unused:s2agt=70:random_seed=3366495987:s2a=on:i=180:gtg=position_2999 on theBenchmark for (2999ds/180Mi)
% 3.46/1.45 % (3809565)lrs+1002_1_ncem=casc2026/models/loop8.pt:sil=128000:tgt=ground:npcc=on:sp=reverse_frequency:spb=intro:random_seed=2424815135:i=137899:s2at=10:gtgl=3:kws=precedence:add=on:bd=preordered:gtg=position_2999 on theBenchmark for (2999ds/137899Mi)
% 3.46/1.45 % (3809569)Also succeeded, but the first one will report.
% 3.46/1.45 % (3809566)First to succeed.
% 3.46/1.45 % (3809568)Also succeeded, but the first one will report.
% 3.46/1.45 % (3809566)Solution written to "/export/starexec/sandbox2/tmp/vampire-proof-3809558"
% 3.46/1.45 % (3809567)dis-1002_1_to=lpo:sil=16000:fd=off:random_seed=646827981:st=1.5:i=114:aac=none:ins=7:ss=axioms:fsd=on_2999 on theBenchmark for (2999ds/114Mi)
% 3.46/1.45 % (3809567)Also succeeded, but the first one will report.
% 3.46/1.45 % (3809566)Refutation found. Thanks to Tanya!
% 3.46/1.45 % SZS status Unsatisfiable for theBenchmark
% 3.46/1.45 % SZS output start Proof for theBenchmark
% See solution above
% 3.46/1.45 % (3809566)------------------------------
% 3.46/1.45 % (3809566)Version: Vampire 5.0.1 (Release build, commit ea8961452 on 2026-07-16 15:14:34 +0200)
% 3.46/1.45 % (3809566)Linked with Z3 4.14.0.0 3c47fd96cf5645d0c42b2c819d9e9a84380aa721 z3-4.8.4-9178-g3c47fd96c
% 3.46/1.45 % (3809566)CaDiCaL version: 2.1.3
% 3.46/1.45 % (3809566)Termination reason: Refutation
% 3.46/1.45 % (3809566)Time elapsed: 0.002 s
% 3.46/1.45 % (3809566)Peak memory usage: 88 MB
% 3.46/1.45 % (3809566)Instructions burned: 1 (million)
% 3.46/1.45 % (3809566)------------------------------
% 3.46/1.45 % (3809566)------------------------------
% 3.46/1.45 % (3809558)Success in time 0.403 s
% 3.46/1.45 % Vampire exiting
%------------------------------------------------------------------------------