%------------------------------------------------------------------------------
% File : Vampire---5.0.1
% Problem : HEN005-5 : TPTP v9.3.1. Released v1.0.0.
% Transfm : none
% Format : tptp:raw
% Command : run_vampire /export/starexec/sandbox2/benchmark/theBenchmark.p 300 THM
% Computer : n016.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 10:19:05 AM UTC 2026
% Result : Unsatisfiable 3.60s 1.51s
% Output : Refutation 3.60s
% Verified :
% SZS Type : Refutation
% Derivation depth : 9
% Number of leaves : 6
% Syntax : Number of formulae : 22 ( 16 unt; 0 def)
% Number of atoms : 31 ( 30 equ)
% Maximal formula atoms : 3 ( 1 avg)
% Number of connectives : 20 ( 11 ~; 9 |; 0 &)
% ( 0 <=>; 0 =>; 0 <=; 0 <~>)
% Maximal formula depth : 6 ( 3 avg)
% Maximal term depth : 4 ( 1 avg)
% Number of predicates : 2 ( 0 usr; 1 prp; 0-2 aty)
% Number of functors : 5 ( 5 usr; 4 con; 0-2 aty)
% Number of variables : 16 ( 16 !; 0 ?)
% Comments :
%------------------------------------------------------------------------------
fof(f2,axiom,
! [X2,X0,X1] : divide(divide(divide(X0,X1),divide(X2,X1)),divide(divide(X0,X2),X1)) = zero,
file('/export/starexec/sandbox2/benchmark/theBenchmark.p',quotient_property) ).
fof(f3,plain,
! [X2,X0,X1] : zero = divide(divide(divide(X0,X1),divide(X2,X1)),divide(divide(X0,X2),X1)),
inference(reorient_equations,[],[f2]) ).
fof(f4,axiom,
! [X0] : divide(zero,X0) = zero,
file('/export/starexec/sandbox2/benchmark/theBenchmark.p',zero_is_smallest) ).
fof(f5,plain,
! [X0] : zero = divide(zero,X0),
inference(reorient_equations,[],[f4]) ).
fof(f6,axiom,
! [X0,X1] :
( divide(X0,X1) != zero
| divide(X1,X0) != zero
| X0 = X1 ),
file('/export/starexec/sandbox2/benchmark/theBenchmark.p',divide_and_equal) ).
fof(f7,plain,
! [X0,X1] :
( zero != divide(X1,X0)
| divide(X0,X1) != zero
| X0 = X1 ),
inference(reorient_equations,[],[f6]) ).
fof(f10,axiom,
divide(a,b) = zero,
file('/export/starexec/sandbox2/benchmark/theBenchmark.p',a_divide_b_is_zero) ).
fof(f11,plain,
zero = divide(a,b),
inference(reorient_equations,[],[f10]) ).
fof(f12,axiom,
divide(b,c) = zero,
file('/export/starexec/sandbox2/benchmark/theBenchmark.p',b_divide_c_is_zero) ).
fof(f13,plain,
zero = divide(b,c),
inference(reorient_equations,[],[f12]) ).
fof(f14,negated_conjecture,
divide(a,c) != zero,
file('/export/starexec/sandbox2/benchmark/theBenchmark.p',prove_transitivity_of_divide_to_zero) ).
fof(f15,plain,
zero != divide(a,c),
inference(reorient_equations,[],[f14]) ).
fof(f23,plain,
! [X0] :
( zero != zero
| zero != divide(X0,zero)
| zero = X0 ),
inference(superposition,[],[f7,f5]) ).
fof(f28,plain,
! [X0] :
( zero != divide(X0,zero)
| zero = X0 ),
inference(trivial_inequality_removal,[],[f23]) ).
fof(f66,plain,
! [X0] : zero = divide(divide(divide(a,X0),divide(b,X0)),divide(zero,X0)),
inference(superposition,[],[f3,f11]) ).
fof(f76,plain,
! [X0] : zero = divide(divide(divide(a,X0),divide(b,X0)),zero),
inference(forward_demodulation,[],[f66,f5]) ).
fof(f112,plain,
zero = divide(divide(divide(a,c),zero),zero),
inference(superposition,[],[f76,f13]) ).
fof(f172,plain,
( zero != zero
| zero = divide(divide(a,c),zero) ),
inference(superposition,[],[f28,f112]) ).
fof(f180,plain,
zero = divide(divide(a,c),zero),
inference(trivial_inequality_removal,[],[f172]) ).
fof(f220,plain,
( zero != zero
| zero = divide(a,c) ),
inference(superposition,[],[f28,f180]) ).
fof(f229,plain,
zero = divide(a,c),
inference(trivial_inequality_removal,[],[f220]) ).
fof(f233,plain,
$false,
inference(forward_subsumption_resolution,[],[f229,f15]) ).
%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.00/0.03 % Problem : HEN005-5 : TPTP v9.3.1. Released v1.0.0.
% 0.00/0.06 % Command : run_vampire /export/starexec/sandbox2/benchmark/theBenchmark.p 300 THM
% 0.12/0.39 % Computer : n016.cluster.edu
% 0.12/0.39 % Model : x86_64 x86_64
% 0.12/0.39 % CPU : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz
% 0.12/0.39 % Memory : 8046.5625MB
% 0.12/0.39 % OS : Linux 6.8.0-71-generic
% 0.12/0.39 % CPULimit : 300
% 0.12/0.39 % WCLimit : 300
% 0.12/0.39 % DateTime : Sun Sep 27 10:54:37 UTC 2026
% 0.12/0.40 % CPUTime :
% 0.12/0.40 Running run_vampire /export/starexec/sandbox2/benchmark/theBenchmark.p 300 THM
% 0.12/0.45 Running first-order theorem proving
% 0.12/0.45 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
% 3.60/1.51 % (2445171)Input is clausal, will run a generic CNF schedule.
% 3.60/1.51 % (2445187)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=2609760285:i=140167_2999 on theBenchmark for (2999ds/140167Mi)
% 3.60/1.51 % (2445190)lrs+10_1_sil=8000:sp=occurrence:random_seed=1920735976:i=107:sd=3:ss=axioms:sgt=8_2999 on theBenchmark for (2999ds/107Mi)
% 3.60/1.51 % (2445189)lrs+1002_1_ncem=casc2026/models/loop8.pt:sil=128000:tgt=ground:npcc=on:sp=reverse_frequency:spb=intro:random_seed=259204446:i=137899:s2at=10:gtgl=3:kws=precedence:add=on:bd=preordered:gtg=position_2999 on theBenchmark for (2999ds/137899Mi)
% 3.60/1.51 % (2445188)lrs+10_1_ncem=casc2026/models/loop8.pt:sil=128000:npcc=on:urr=on:br=off:random_seed=863117744:i=132376:av=off_2999 on theBenchmark for (2999ds/132376Mi)
% 3.60/1.51 % (2445190)First to succeed.
% 3.60/1.51 % (2445190)Solution written to "/export/starexec/sandbox2/tmp/vampire-proof-2445171"
% 3.60/1.51 % (2445191)dis-1002_1_to=lpo:sil=16000:fd=off:random_seed=1654363871:st=1.5:i=114:aac=none:ins=7:ss=axioms:fsd=on_2999 on theBenchmark for (2999ds/114Mi)
% 3.60/1.51 % (2445192)dis-1011_1_sil=16000:fde=unused:s2agt=70:random_seed=3764450902:s2a=on:i=180:gtg=position_2999 on theBenchmark for (2999ds/180Mi)
% 3.60/1.51 % (2445193)dis-21_1_sil=8000:lcm=predicate:random_seed=2008928646: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)
% 3.60/1.51 % (2445192)Also succeeded, but the first one will report.
% 3.60/1.51 % (2445193)Instruction limit reached!
% 3.60/1.51 % (2445193)------------------------------
% 3.60/1.51 % (2445193)Version: Vampire 5.0.1 (Release build, commit ea8961452 on 2026-07-16 15:14:34 +0200)
% 3.60/1.51 % (2445193)Linked with Z3 4.14.0.0 3c47fd96cf5645d0c42b2c819d9e9a84380aa721 z3-4.8.4-9178-g3c47fd96c
% 3.60/1.51 % (2445193)CaDiCaL version: 2.1.3
% 3.60/1.51 % (2445193)Termination reason: Instruction limit
% 3.60/1.51 % (2445193)Termination phase: Saturation
% 3.60/1.51 % (2445193)Time elapsed: 0.056 s
% 3.60/1.51 % (2445193)Peak memory usage: 89 MB
% 3.60/1.51 % (2445193)Instructions burned: 118 (million)
% 3.60/1.51 % (2445191)Instruction limit reached!
% 3.60/1.51 % (2445191)------------------------------
% 3.60/1.51 % (2445191)Version: Vampire 5.0.1 (Release build, commit ea8961452 on 2026-07-16 15:14:34 +0200)
% 3.60/1.51 % (2445191)Linked with Z3 4.14.0.0 3c47fd96cf5645d0c42b2c819d9e9a84380aa721 z3-4.8.4-9178-g3c47fd96c
% 3.60/1.51 % (2445191)CaDiCaL version: 2.1.3
% 3.60/1.51 % (2445191)Termination reason: Instruction limit
% 3.60/1.51 % (2445191)Termination phase: Saturation
% 3.60/1.51 % (2445191)Time elapsed: 0.069 s
% 3.60/1.51 % (2445191)Peak memory usage: 89 MB
% 3.60/1.51 % (2445191)Instructions burned: 115 (million)
% 3.60/1.51 % (2445204)dis+1010_3_sil=8000:plsq=on:drc=off:fde=none:plsqc=1:bsd=on:plsqr=7,2:sos=on:spb=goal_then_units:random_seed=4152751950:i=143:sd=2:aac=none:ss=axioms:sgt=16_2997 on theBenchmark for (2997ds/143Mi)
% 3.60/1.51 % (2445205)ott-1010_1_to=lpo:sil=16000:sos=on:spb=units:urr=on:bce=on:br=off:random_seed=899897319:st=3:avsq=on:s2a=on:i=189:s2at=1.2:avsqr=1,16:sd=2:bd=all:nm=64:ss=axioms:sgt=30_2997 on theBenchmark for (2997ds/189Mi)
% 3.60/1.51 % (2445204)Also succeeded, but the first one will report.
% 3.60/1.51 % (2445190)Refutation found. Thanks to Tanya!
% 3.60/1.51 % SZS status Unsatisfiable for theBenchmark
% 3.60/1.51 % SZS output start Proof for theBenchmark
% See solution above
% 3.60/1.51 % (2445190)------------------------------
% 3.60/1.51 % (2445190)Version: Vampire 5.0.1 (Release build, commit ea8961452 on 2026-07-16 15:14:34 +0200)
% 3.60/1.51 % (2445190)Linked with Z3 4.14.0.0 3c47fd96cf5645d0c42b2c819d9e9a84380aa721 z3-4.8.4-9178-g3c47fd96c
% 3.60/1.51 % (2445190)CaDiCaL version: 2.1.3
% 3.60/1.51 % (2445190)Termination reason: Refutation
% 3.60/1.51 % (2445190)Time elapsed: 0.006 s
% 3.60/1.51 % (2445190)Peak memory usage: 88 MB
% 3.60/1.51 % (2445190)Instructions burned: 8 (million)
% 3.60/1.51 % (2445190)------------------------------
% 3.60/1.51 % (2445190)------------------------------
% 3.60/1.51 % (2445171)Success in time 0.41 s
% 3.60/1.51 % Vampire exiting
%------------------------------------------------------------------------------