%------------------------------------------------------------------------------
% File : Vampire---5.0.1
% Problem : ITP209_4 : TPTP v9.3.1. Released v8.0.0.
% 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 11:30:06 AM UTC 2026
% Result : Theorem 3.79s 1.52s
% Output : Refutation 3.79s
% Verified :
% SZS Type : Refutation
% Derivation depth : 7
% Number of leaves : 4
% Syntax : Number of formulae : 14 ( 14 unt; 0 typ; 1 def)
% Number of atoms : 14 ( 8 equ)
% Maximal formula atoms : 1 ( 1 avg)
% Number of connectives : 5 ( 5 ~; 0 |; 0 &)
% ( 0 <=>; 0 =>; 0 <=; 0 <~>)
% Maximal formula depth : 4 ( 2 avg)
% Maximal term depth : 6 ( 2 avg)
% Number of FOOLs : 1 ( 1 fml; 0 var)
% Number of types : 2 ( 1 usr)
% Number of type conns : 0 ( 0 >; 0 *; 0 +; 0 <<)
% Number of predicates : 6 ( 4 usr; 1 prp; 0-4 aty)
% Number of functors : 6 ( 6 usr; 4 con; 0-4 aty)
% Number of variables : 10 ( 10 !; 0 ?; 10 :)
% Comments :
%------------------------------------------------------------------------------
tff(type_def_5,type,
fun: ( $tType * $tType ) > $tType ).
tff(type_def_6,type,
a: $tType ).
tff(func_def_0,type,
aa:
!>[X0: $tType,X1: $tType] : ( ( fun(X0,X1) * X0 ) > X1 ) ).
tff(func_def_1,type,
a2: a ).
tff(func_def_2,type,
b: a ).
tff(func_def_3,type,
c: a ).
tff(func_def_4,type,
f: fun(a,fun(a,a)) ).
tff(pred_def_1,type,
syntax_ac_operator:
!>[X0: $tType] : ( fun(X0,fun(X0,X0)) > $o ) ).
tff(pred_def_2,type,
syntax7388354845996824322omatch:
!>[X0: $tType,X1: $tType] : ( ( X0 * X1 ) > $o ) ).
tff(pred_def_3,type,
syntax2379306206330768139omatch:
!>[X0: $tType,X1: $tType] : ( ( X0 * X1 ) > $o ) ).
tff(pred_def_4,type,
sP0: a > $o ).
tff(f2,axiom,
! [X0: a,X1: a] : ( aa(a,a,aa(a,fun(a,a),f,X0),X1) = aa(a,a,aa(a,fun(a,a),f,X1),X0) ),
file('/export/starexec/sandbox2/benchmark/theBenchmark.p',fact_1_commute) ).
tff(f4,axiom,
! [X0: a,X1: a,X2: a] : ( aa(a,a,aa(a,fun(a,a),f,aa(a,a,aa(a,fun(a,a),f,X0),X1)),X2) = aa(a,a,aa(a,fun(a,a),f,X0),aa(a,a,aa(a,fun(a,a),f,X1),X2)) ),
file('/export/starexec/sandbox2/benchmark/theBenchmark.p',fact_3_right__assoc) ).
tff(f13,conjecture,
aa(a,a,aa(a,fun(a,a),f,aa(a,a,aa(a,fun(a,a),f,a2),b)),c) = aa(a,a,aa(a,fun(a,a),f,aa(a,a,aa(a,fun(a,a),f,a2),c)),b),
file('/export/starexec/sandbox2/benchmark/theBenchmark.p',conj_0) ).
tff(f14,negated_conjecture,
( ( ~ aa(a,a,aa(a,fun(a,a),f,aa(a,a,aa(a,fun(a,a),f,a2),b)),c) ) = aa(a,a,aa(a,fun(a,a),f,aa(a,a,aa(a,fun(a,a),f,a2),c)),b) ),
inference(negated_conjecture,[status(cth)],[f13]) ).
tff(f15,plain,
aa(a,a,aa(a,fun(a,a),f,aa(a,a,aa(a,fun(a,a),f,a2),b)),c) != aa(a,a,aa(a,fun(a,a),f,aa(a,a,aa(a,fun(a,a),f,a2),c)),b),
inference(flattening,[],[f14]) ).
tff(f17,plain,
aa(a,a,aa(a,fun(a,a),f,aa(a,a,aa(a,fun(a,a),f,a2),b)),c) != aa(a,a,aa(a,fun(a,a),f,aa(a,a,aa(a,fun(a,a),f,a2),c)),b),
inference(cnf_transformation,[],[f15]) ).
tff(f18,plain,
! [X2: a,X0: a,X1: a] : ( aa(a,a,aa(a,fun(a,a),f,X0),aa(a,a,aa(a,fun(a,a),f,X1),X2)) = aa(a,a,aa(a,fun(a,a),f,aa(a,a,aa(a,fun(a,a),f,X0),X1)),X2) ),
inference(cnf_transformation,[],[f4]) ).
tff(f20,plain,
! [X0: a,X1: a] : ( aa(a,a,aa(a,fun(a,a),f,X0),X1) = aa(a,a,aa(a,fun(a,a),f,X1),X0) ),
inference(cnf_transformation,[],[f2]) ).
tff(f21,definition,
~ sP0(aa(a,a,aa(a,fun(a,a),f,aa(a,a,aa(a,fun(a,a),f,a2),b)),c)),
introduced(definition,[new_symbols(definition,[sP0])],[inequality_splitting_name_introduction]) ).
tff(f22,plain,
sP0(aa(a,a,aa(a,fun(a,a),f,aa(a,a,aa(a,fun(a,a),f,a2),c)),b)),
inference(inequality_splitting,[],[f17,f21]) ).
tff(f23,plain,
~ sP0(aa(a,a,aa(a,fun(a,a),f,a2),aa(a,a,aa(a,fun(a,a),f,b),c))),
inference(forward_demodulation,[],[f21,f18]) ).
tff(f24,plain,
sP0(aa(a,a,aa(a,fun(a,a),f,a2),aa(a,a,aa(a,fun(a,a),f,c),b))),
inference(forward_demodulation,[],[f22,f18]) ).
tff(f25,plain,
sP0(aa(a,a,aa(a,fun(a,a),f,a2),aa(a,a,aa(a,fun(a,a),f,b),c))),
inference(forward_demodulation,[],[f24,f20]) ).
tff(f26,plain,
$false,
inference(forward_subsumption_resolution,[],[f25,f23]) ).
%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.00/0.02 % Problem : ITP209_4 : TPTP v9.3.1. Released v8.0.0.
% 0.00/0.05 % Command : run_vampire /export/starexec/sandbox2/benchmark/theBenchmark.p 300 THM
% 0.10/0.38 % Computer : n002.cluster.edu
% 0.10/0.38 % Model : x86_64 x86_64
% 0.10/0.38 % CPU : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz
% 0.10/0.38 % Memory : 8046.5625MB
% 0.10/0.38 % OS : Linux 6.8.0-71-generic
% 0.10/0.39 % CPULimit : 300
% 0.10/0.39 % WCLimit : 300
% 0.10/0.39 % DateTime : Sun Sep 27 12:26:22 UTC 2026
% 0.10/0.39 % CPUTime :
% 0.10/0.39 Running run_vampire /export/starexec/sandbox2/benchmark/theBenchmark.p 300 THM
% 0.10/0.42 Running first-order theorem proving
% 0.10/0.42 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
% 3.79/1.52 % (3454841)Detected formulas, will run a generic FOF schedule.
% 3.79/1.52 % (3454852)dis-21_1_sil=8000:lcm=predicate:random_seed=1628637664:st=5:avsq=on:i=129:avsqr=1,16:sd=3:aac=none:ep=RS:fsr=off:ss=included_2999 on theBenchmark for (2999ds/129Mi)
% 3.79/1.52 % (3454852)Refutation not found, incomplete strategy
% 3.79/1.52 % (3454852)------------------------------
% 3.79/1.52 % (3454852)Version: Vampire 5.0.1 (Release build, commit ea8961452 on 2026-07-16 15:14:34 +0200)
% 3.79/1.52 % (3454852)Linked with Z3 4.14.0.0 3c47fd96cf5645d0c42b2c819d9e9a84380aa721 z3-4.8.4-9178-g3c47fd96c
% 3.79/1.52 % (3454852)CaDiCaL version: 2.1.3
% 3.79/1.52 % (3454852)Termination reason: Refutation not found, incomplete strategy
% 3.79/1.52 % (3454852)Time elapsed: 0.002 s
% 3.79/1.52 % (3454852)Peak memory usage: 88 MB
% 3.79/1.52 % (3454852)Instructions burned: 3 (million)
% 3.79/1.52 % (3454850)dis-1010_2:3_sil=16000:sp=reverse_frequency:random_seed=2280880440:i=119:av=off:ss=axioms_2999 on theBenchmark for (2999ds/119Mi)
% 3.79/1.52 % (3454846)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=1437998227:i=141193_2999 on theBenchmark for (2999ds/141193Mi)
% 3.79/1.52 % (3454848)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=2789403585:i=141695:sd=1:nm=32:gsp=on:ss=included_2999 on theBenchmark for (2999ds/141695Mi)
% 3.79/1.52 % (3454849)lrs+1010_1_to=lpo:sil=32000:sos=on:spb=goal_then_units:bce=on:random_seed=3365426213:i=109:sd=1:ins=1:gsp=on:ss=axioms_2999 on theBenchmark for (2999ds/109Mi)
% 3.79/1.52 % (3454847)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=1067265469:i=134677:sd=20:aac=none:nm=16:ss=included:sgt=10_2999 on theBenchmark for (2999ds/134677Mi)
% 3.79/1.52 % (3454851)dis-1011_1_sil=16000:fde=unused:s2agt=70:random_seed=2777770174:s2a=on:i=139:gtg=position_2999 on theBenchmark for (2999ds/139Mi)
% 3.79/1.52 % (3454849)WARNING: Not using GeneralSplitting currently not compatible with polymorphic/higher-order inputs.
% 3.79/1.52 % (3454848)WARNING: Not using GeneralSplitting currently not compatible with polymorphic/higher-order inputs.
% 3.79/1.52 % (3454849)First to succeed.
% 3.79/1.52 % (3454849)Solution written to "/export/starexec/sandbox2/tmp/vampire-proof-3454841"
% 3.79/1.52 % (3454850)Also succeeded, but the first one will report.
% 3.79/1.52 % (3454851)Also succeeded, but the first one will report.
% 3.79/1.52 % (3454852)------------------------------
% 3.79/1.52 % (3454852)------------------------------
% 3.79/1.52 % (3454860)lrs+10_1_sil=8000:sp=occurrence:random_seed=2514638115:i=285:sd=3:ss=axioms:sgt=8_2997 on theBenchmark for (2997ds/285Mi)
% 3.79/1.52 % (3454860)Also succeeded, but the first one will report.
% 3.79/1.52 % (3454849)Refutation found. Thanks to Tanya!
% 3.79/1.52 % SZS status Theorem for theBenchmark
% 3.79/1.52 % SZS output start Proof for theBenchmark
% See solution above
% 3.79/1.52 % (3454849)------------------------------
% 3.79/1.52 % (3454849)Version: Vampire 5.0.1 (Release build, commit ea8961452 on 2026-07-16 15:14:34 +0200)
% 3.79/1.52 % (3454849)Linked with Z3 4.14.0.0 3c47fd96cf5645d0c42b2c819d9e9a84380aa721 z3-4.8.4-9178-g3c47fd96c
% 3.79/1.52 % (3454849)CaDiCaL version: 2.1.3
% 3.79/1.52 % (3454849)Termination reason: Refutation
% 3.79/1.52 % (3454849)Time elapsed: 0.002 s
% 3.79/1.52 % (3454849)Peak memory usage: 88 MB
% 3.79/1.52 % (3454849)Instructions burned: 1 (million)
% 3.79/1.52 % (3454849)------------------------------
% 3.79/1.52 % (3454849)------------------------------
% 3.79/1.52 % (3454841)Success in time 0.444 s
% 3.79/1.52 % Vampire exiting
%------------------------------------------------------------------------------