TSTP Solution File: GRP576-1 by Vampire---4.8
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- Process Solution
%------------------------------------------------------------------------------
% File : Vampire---4.8
% Problem : GRP576-1 : TPTP v8.1.2. Bugfixed v2.7.0.
% Transfm : none
% Format : tptp:raw
% Command : vampire --input_syntax tptp --proof tptp --output_axiom_names on --mode portfolio --schedule file --schedule_file /export/starexec/sandbox/solver/bin/quickGreedyProduceRating_steal_pow3.txt --cores 8 -m 12000 -t %d %s
% Computer : n003.cluster.edu
% Model : x86_64 x86_64
% CPU : Intel(R) Xeon(R) CPU E5-2620 v4 2.10GHz
% Memory : 8042.1875MB
% OS : Linux 3.10.0-693.el7.x86_64
% CPULimit : 300s
% WCLimit : 300s
% DateTime : Wed May 1 02:30:15 EDT 2024
% Result : Unsatisfiable 0.63s 0.76s
% Output : Refutation 0.63s
% Verified :
% SZS Type : Refutation
% Derivation depth : 20
% Number of leaves : 6
% Syntax : Number of formulae : 52 ( 52 unt; 0 def)
% Number of atoms : 52 ( 46 equ)
% Maximal formula atoms : 1 ( 1 avg)
% Number of connectives : 5 ( 5 ~; 0 |; 0 &)
% ( 0 <=>; 0 =>; 0 <=; 0 <~>)
% Maximal formula depth : 5 ( 2 avg)
% Maximal term depth : 9 ( 2 avg)
% Number of predicates : 3 ( 1 usr; 1 prp; 0-2 aty)
% Number of functors : 6 ( 6 usr; 3 con; 0-2 aty)
% Number of variables : 68 ( 68 !; 0 ?)
% Comments :
%------------------------------------------------------------------------------
fof(f301,plain,
$false,
inference(subsumption_resolution,[],[f300,f96]) ).
fof(f96,plain,
sP0(double_divide(identity,double_divide(a,b))),
inference(backward_demodulation,[],[f9,f95]) ).
fof(f95,plain,
! [X0] : double_divide(X0,identity) = double_divide(identity,X0),
inference(backward_demodulation,[],[f68,f94]) ).
fof(f94,plain,
! [X0] : double_divide(identity,double_divide(X0,identity)) = X0,
inference(forward_demodulation,[],[f91,f70]) ).
fof(f70,plain,
! [X0] : double_divide(double_divide(X0,identity),identity) = X0,
inference(backward_demodulation,[],[f27,f68]) ).
fof(f27,plain,
! [X0] : double_divide(double_divide(identity,double_divide(identity,double_divide(X0,identity))),identity) = X0,
inference(backward_demodulation,[],[f12,f25]) ).
fof(f25,plain,
identity = double_divide(identity,identity),
inference(forward_demodulation,[],[f23,f15]) ).
fof(f15,plain,
! [X0] : identity = double_divide(double_divide(double_divide(X0,identity),X0),double_divide(identity,identity)),
inference(superposition,[],[f1,f12]) ).
fof(f1,axiom,
! [X2,X0,X1] : double_divide(double_divide(X0,double_divide(double_divide(X1,double_divide(X2,X0)),double_divide(X2,identity))),double_divide(identity,identity)) = X1,
file('/export/starexec/sandbox/tmp/tmp.di679XpNPM/Vampire---4.8_21149',single_axiom) ).
fof(f23,plain,
double_divide(identity,identity) = double_divide(double_divide(double_divide(identity,identity),identity),double_divide(identity,identity)),
inference(superposition,[],[f10,f15]) ).
fof(f10,plain,
! [X0,X1] : double_divide(double_divide(double_divide(X0,identity),double_divide(double_divide(X1,identity),double_divide(X0,identity))),double_divide(identity,identity)) = X1,
inference(superposition,[],[f1,f6]) ).
fof(f6,plain,
! [X0] : identity = double_divide(X0,double_divide(X0,identity)),
inference(definition_unfolding,[],[f4,f3]) ).
fof(f3,axiom,
! [X0] : inverse(X0) = double_divide(X0,identity),
file('/export/starexec/sandbox/tmp/tmp.di679XpNPM/Vampire---4.8_21149',inverse) ).
fof(f4,axiom,
! [X0] : identity = double_divide(X0,inverse(X0)),
file('/export/starexec/sandbox/tmp/tmp.di679XpNPM/Vampire---4.8_21149',identity) ).
fof(f12,plain,
! [X0] : double_divide(double_divide(identity,double_divide(identity,double_divide(X0,identity))),double_divide(identity,identity)) = X0,
inference(superposition,[],[f1,f6]) ).
fof(f91,plain,
! [X0] : double_divide(identity,double_divide(X0,identity)) = double_divide(double_divide(X0,identity),identity),
inference(superposition,[],[f70,f71]) ).
fof(f71,plain,
! [X0] : double_divide(X0,identity) = double_divide(double_divide(identity,double_divide(X0,identity)),identity),
inference(backward_demodulation,[],[f30,f68]) ).
fof(f30,plain,
! [X0] : double_divide(identity,double_divide(identity,double_divide(X0,identity))) = double_divide(double_divide(identity,double_divide(X0,identity)),identity),
inference(backward_demodulation,[],[f16,f25]) ).
fof(f16,plain,
! [X0] : double_divide(identity,double_divide(identity,double_divide(X0,identity))) = double_divide(double_divide(identity,double_divide(X0,double_divide(identity,identity))),double_divide(identity,identity)),
inference(superposition,[],[f1,f12]) ).
fof(f68,plain,
! [X0] : double_divide(X0,identity) = double_divide(identity,double_divide(identity,double_divide(X0,identity))),
inference(backward_demodulation,[],[f41,f60]) ).
fof(f60,plain,
! [X0] : double_divide(X0,identity) = double_divide(double_divide(identity,double_divide(identity,X0)),identity),
inference(superposition,[],[f32,f47]) ).
fof(f47,plain,
! [X0] : identity = double_divide(double_divide(X0,identity),X0),
inference(forward_demodulation,[],[f46,f25]) ).
fof(f46,plain,
! [X0] : double_divide(identity,identity) = double_divide(double_divide(X0,identity),X0),
inference(forward_demodulation,[],[f40,f6]) ).
fof(f40,plain,
! [X0] : double_divide(double_divide(X0,identity),X0) = double_divide(double_divide(identity,double_divide(identity,identity)),identity),
inference(superposition,[],[f27,f29]) ).
fof(f29,plain,
! [X0] : identity = double_divide(double_divide(double_divide(X0,identity),X0),identity),
inference(backward_demodulation,[],[f15,f25]) ).
fof(f32,plain,
! [X3,X1] : double_divide(double_divide(identity,double_divide(double_divide(X3,X1),X1)),identity) = X3,
inference(forward_demodulation,[],[f31,f27]) ).
fof(f31,plain,
! [X3,X1] : double_divide(double_divide(identity,double_divide(double_divide(X3,X1),double_divide(double_divide(identity,double_divide(identity,double_divide(X1,identity))),identity))),identity) = X3,
inference(backward_demodulation,[],[f19,f25]) ).
fof(f19,plain,
! [X3,X1] : double_divide(double_divide(double_divide(identity,identity),double_divide(double_divide(X3,X1),double_divide(double_divide(identity,double_divide(identity,double_divide(X1,identity))),identity))),double_divide(identity,identity)) = X3,
inference(backward_demodulation,[],[f11,f18]) ).
fof(f18,plain,
! [X2,X0,X1] : double_divide(X0,double_divide(double_divide(X1,double_divide(X2,X0)),double_divide(X2,identity))) = double_divide(identity,double_divide(identity,double_divide(X1,identity))),
inference(backward_demodulation,[],[f13,f16]) ).
fof(f13,plain,
! [X2,X0,X1] : double_divide(X0,double_divide(double_divide(X1,double_divide(X2,X0)),double_divide(X2,identity))) = double_divide(double_divide(identity,double_divide(X1,double_divide(identity,identity))),double_divide(identity,identity)),
inference(superposition,[],[f1,f1]) ).
fof(f11,plain,
! [X2,X3,X0,X1] : double_divide(double_divide(double_divide(identity,identity),double_divide(double_divide(X3,X1),double_divide(double_divide(X0,double_divide(double_divide(X1,double_divide(X2,X0)),double_divide(X2,identity))),identity))),double_divide(identity,identity)) = X3,
inference(superposition,[],[f1,f1]) ).
fof(f41,plain,
! [X0] : double_divide(identity,double_divide(identity,double_divide(X0,identity))) = double_divide(double_divide(identity,double_divide(identity,X0)),identity),
inference(superposition,[],[f27,f27]) ).
fof(f9,plain,
sP0(double_divide(double_divide(a,b),identity)),
inference(inequality_splitting,[],[f7,f8]) ).
fof(f8,plain,
~ sP0(double_divide(double_divide(b,a),identity)),
introduced(inequality_splitting_name_introduction,[new_symbols(naming,[sP0])]) ).
fof(f7,plain,
double_divide(double_divide(b,a),identity) != double_divide(double_divide(a,b),identity),
inference(definition_unfolding,[],[f5,f2,f2]) ).
fof(f2,axiom,
! [X0,X1] : multiply(X0,X1) = double_divide(double_divide(X1,X0),identity),
file('/export/starexec/sandbox/tmp/tmp.di679XpNPM/Vampire---4.8_21149',multiply) ).
fof(f5,axiom,
multiply(a,b) != multiply(b,a),
file('/export/starexec/sandbox/tmp/tmp.di679XpNPM/Vampire---4.8_21149',prove_these_axioms_4) ).
fof(f300,plain,
~ sP0(double_divide(identity,double_divide(a,b))),
inference(backward_demodulation,[],[f97,f286]) ).
fof(f286,plain,
! [X0,X1] : double_divide(X1,X0) = double_divide(X0,X1),
inference(superposition,[],[f273,f159]) ).
fof(f159,plain,
! [X0,X1] : double_divide(double_divide(X0,X1),X1) = X0,
inference(forward_demodulation,[],[f158,f94]) ).
fof(f158,plain,
! [X0,X1] : double_divide(identity,double_divide(X0,identity)) = double_divide(double_divide(X0,X1),X1),
inference(forward_demodulation,[],[f152,f95]) ).
fof(f152,plain,
! [X0,X1] : double_divide(double_divide(X0,identity),identity) = double_divide(double_divide(X0,X1),X1),
inference(superposition,[],[f87,f74]) ).
fof(f74,plain,
! [X0,X1] : double_divide(X0,identity) = double_divide(identity,double_divide(double_divide(X0,X1),X1)),
inference(backward_demodulation,[],[f66,f68]) ).
fof(f66,plain,
! [X0,X1] : double_divide(identity,double_divide(identity,double_divide(X0,identity))) = double_divide(identity,double_divide(double_divide(X0,X1),X1)),
inference(forward_demodulation,[],[f59,f30]) ).
fof(f59,plain,
! [X0,X1] : double_divide(double_divide(identity,double_divide(X0,identity)),identity) = double_divide(identity,double_divide(double_divide(X0,X1),X1)),
inference(superposition,[],[f32,f32]) ).
fof(f87,plain,
! [X0] : double_divide(double_divide(identity,X0),identity) = X0,
inference(superposition,[],[f71,f70]) ).
fof(f273,plain,
! [X0,X1] : double_divide(X0,double_divide(X1,X0)) = X1,
inference(forward_demodulation,[],[f265,f70]) ).
fof(f265,plain,
! [X0,X1] : double_divide(double_divide(X1,identity),identity) = double_divide(X0,double_divide(X1,X0)),
inference(superposition,[],[f70,f213]) ).
fof(f213,plain,
! [X0,X1] : double_divide(X0,identity) = double_divide(double_divide(X1,double_divide(X0,X1)),identity),
inference(superposition,[],[f187,f70]) ).
fof(f187,plain,
! [X0,X1] : double_divide(double_divide(X0,double_divide(double_divide(X1,identity),X0)),identity) = X1,
inference(superposition,[],[f26,f70]) ).
fof(f26,plain,
! [X0,X1] : double_divide(double_divide(double_divide(X0,identity),double_divide(double_divide(X1,identity),double_divide(X0,identity))),identity) = X1,
inference(backward_demodulation,[],[f10,f25]) ).
fof(f97,plain,
~ sP0(double_divide(identity,double_divide(b,a))),
inference(backward_demodulation,[],[f8,f95]) ).
%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.13/0.13 % Problem : GRP576-1 : TPTP v8.1.2. Bugfixed v2.7.0.
% 0.13/0.15 % Command : vampire --input_syntax tptp --proof tptp --output_axiom_names on --mode portfolio --schedule file --schedule_file /export/starexec/sandbox/solver/bin/quickGreedyProduceRating_steal_pow3.txt --cores 8 -m 12000 -t %d %s
% 0.15/0.36 % Computer : n003.cluster.edu
% 0.15/0.36 % Model : x86_64 x86_64
% 0.15/0.36 % CPU : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz
% 0.15/0.36 % Memory : 8042.1875MB
% 0.15/0.36 % OS : Linux 3.10.0-693.el7.x86_64
% 0.15/0.36 % CPULimit : 300
% 0.15/0.36 % WCLimit : 300
% 0.15/0.36 % DateTime : Tue Apr 30 18:29:33 EDT 2024
% 0.15/0.36 % CPUTime :
% 0.15/0.36 This is a CNF_UNS_RFO_PEQ_UEQ problem
% 0.15/0.36 Running vampire --input_syntax tptp --proof tptp --output_axiom_names on --mode portfolio --schedule file --schedule_file /export/starexec/sandbox/solver/bin/quickGreedyProduceRating_steal_pow3.txt --cores 8 -m 12000 -t 300 /export/starexec/sandbox/tmp/tmp.di679XpNPM/Vampire---4.8_21149
% 0.56/0.75 % (21411)lrs+21_1:5_sil=2000:sos=on:urr=on:newcnf=on:slsq=on:i=83:slsql=off:bd=off:nm=2:ss=axioms:st=1.5:sp=const_min:gsp=on:rawr=on_0 on Vampire---4 for (2996ds/83Mi)
% 0.56/0.75 % (21411)Refutation not found, incomplete strategy% (21411)------------------------------
% 0.56/0.75 % (21411)Version: Vampire 4.8 (commit 8e9376e55 on 2024-01-18 13:49:33 +0100)
% 0.56/0.75 % (21411)Termination reason: Refutation not found, incomplete strategy
% 0.56/0.75
% 0.56/0.75 % (21411)Memory used [KB]: 949
% 0.56/0.75 % (21411)Time elapsed: 0.002 s
% 0.56/0.75 % (21411)Instructions burned: 2 (million)
% 0.56/0.75 % (21411)------------------------------
% 0.56/0.75 % (21411)------------------------------
% 0.56/0.75 % (21405)dis-1011_2:1_sil=2000:lsd=20:nwc=5.0:flr=on:mep=off:st=3.0:i=34:sd=1:ep=RS:ss=axioms_0 on Vampire---4 for (2996ds/34Mi)
% 0.56/0.75 % (21406)lrs+1011_461:32768_sil=16000:irw=on:sp=frequency:lsd=20:fd=preordered:nwc=10.0:s2agt=32:alpa=false:cond=fast:s2a=on:i=51:s2at=3.0:awrs=decay:awrsf=691:bd=off:nm=20:fsr=off:amm=sco:uhcvi=on:rawr=on_0 on Vampire---4 for (2996ds/51Mi)
% 0.56/0.75 % (21408)ott+1011_1:1_sil=2000:urr=on:i=33:sd=1:kws=inv_frequency:ss=axioms:sup=off_0 on Vampire---4 for (2996ds/33Mi)
% 0.56/0.75 % (21409)lrs+2_1:1_sil=16000:fde=none:sos=all:nwc=5.0:i=34:ep=RS:s2pl=on:lma=on:afp=100000_0 on Vampire---4 for (2996ds/34Mi)
% 0.56/0.75 % (21407)lrs+1011_1:1_sil=8000:sp=occurrence:nwc=10.0:i=78:ss=axioms:sgt=8_0 on Vampire---4 for (2996ds/78Mi)
% 0.56/0.75 % (21410)lrs+1002_1:16_to=lpo:sil=32000:sp=unary_frequency:sos=on:i=45:bd=off:ss=axioms_0 on Vampire---4 for (2996ds/45Mi)
% 0.56/0.75 % (21408)Refutation not found, incomplete strategy% (21408)------------------------------
% 0.56/0.75 % (21408)Version: Vampire 4.8 (commit 8e9376e55 on 2024-01-18 13:49:33 +0100)
% 0.56/0.75 % (21408)Termination reason: Refutation not found, incomplete strategy
% 0.56/0.75
% 0.56/0.75 % (21408)Memory used [KB]: 947
% 0.56/0.75 % (21408)Time elapsed: 0.002 s
% 0.56/0.75 % (21408)Instructions burned: 2 (million)
% 0.56/0.75 % (21408)------------------------------
% 0.56/0.75 % (21408)------------------------------
% 0.56/0.75 % (21409)Refutation not found, incomplete strategy% (21409)------------------------------
% 0.56/0.75 % (21409)Version: Vampire 4.8 (commit 8e9376e55 on 2024-01-18 13:49:33 +0100)
% 0.56/0.75 % (21410)Refutation not found, incomplete strategy% (21410)------------------------------
% 0.56/0.75 % (21410)Version: Vampire 4.8 (commit 8e9376e55 on 2024-01-18 13:49:33 +0100)
% 0.56/0.75 % (21410)Termination reason: Refutation not found, incomplete strategy
% 0.56/0.75
% 0.56/0.75 % (21410)Memory used [KB]: 949
% 0.56/0.75 % (21410)Time elapsed: 0.002 s
% 0.56/0.75 % (21410)Instructions burned: 2 (million)
% 0.56/0.75 % (21410)------------------------------
% 0.56/0.75 % (21410)------------------------------
% 0.56/0.75 % (21405)Refutation not found, incomplete strategy% (21405)------------------------------
% 0.56/0.75 % (21405)Version: Vampire 4.8 (commit 8e9376e55 on 2024-01-18 13:49:33 +0100)
% 0.56/0.75 % (21405)Termination reason: Refutation not found, incomplete strategy
% 0.56/0.75
% 0.56/0.75 % (21405)Memory used [KB]: 963
% 0.56/0.75 % (21405)Time elapsed: 0.002 s
% 0.56/0.75 % (21405)Instructions burned: 2 (million)
% 0.56/0.75 % (21405)------------------------------
% 0.56/0.75 % (21405)------------------------------
% 0.56/0.75 % (21409)Termination reason: Refutation not found, incomplete strategy
% 0.56/0.75
% 0.56/0.75 % (21409)Memory used [KB]: 962
% 0.56/0.75 % (21409)Time elapsed: 0.002 s
% 0.56/0.75 % (21409)Instructions burned: 2 (million)
% 0.56/0.75 % (21409)------------------------------
% 0.56/0.75 % (21409)------------------------------
% 0.56/0.75 % (21413)lrs+21_1:16_sil=2000:sp=occurrence:urr=on:flr=on:i=55:sd=1:nm=0:ins=3:ss=included:rawr=on:br=off_0 on Vampire---4 for (2996ds/55Mi)
% 0.56/0.75 % (21412)lrs-21_1:1_to=lpo:sil=2000:sp=frequency:sos=on:lma=on:i=56:sd=2:ss=axioms:ep=R_0 on Vampire---4 for (2996ds/56Mi)
% 0.56/0.75 % (21412)Refutation not found, incomplete strategy% (21412)------------------------------
% 0.56/0.75 % (21412)Version: Vampire 4.8 (commit 8e9376e55 on 2024-01-18 13:49:33 +0100)
% 0.56/0.75 % (21412)Termination reason: Refutation not found, incomplete strategy
% 0.56/0.75
% 0.56/0.75 % (21412)Memory used [KB]: 948
% 0.56/0.75 % (21412)Time elapsed: 0.002 s
% 0.56/0.75 % (21412)Instructions burned: 2 (million)
% 0.56/0.75 % (21412)------------------------------
% 0.56/0.75 % (21412)------------------------------
% 0.56/0.76 % (21415)lrs+1010_1:2_sil=4000:tgt=ground:nwc=10.0:st=2.0:i=208:sd=1:bd=off:ss=axioms_0 on Vampire---4 for (2996ds/208Mi)
% 0.56/0.76 % (21416)lrs-1011_1:1_sil=4000:plsq=on:plsqr=32,1:sp=frequency:plsql=on:nwc=10.0:i=52:aac=none:afr=on:ss=axioms:er=filter:sgt=16:rawr=on:etr=on:lma=on_0 on Vampire---4 for (2996ds/52Mi)
% 0.56/0.76 % (21414)dis+3_25:4_sil=16000:sos=all:erd=off:i=50:s2at=4.0:bd=off:nm=60:sup=off:cond=on:av=off:ins=2:nwc=10.0:etr=on:to=lpo:s2agt=20:fd=off:bsr=unit_only:slsq=on:slsqr=28,19:awrs=converge:awrsf=500:tgt=ground:bs=unit_only_0 on Vampire---4 for (2996ds/50Mi)
% 0.56/0.76 % (21417)lrs-1010_1:1_to=lpo:sil=2000:sp=reverse_arity:sos=on:urr=ec_only:i=518:sd=2:bd=off:ss=axioms:sgt=16_0 on Vampire---4 for (2996ds/518Mi)
% 0.56/0.76 % (21414)Refutation not found, incomplete strategy% (21414)------------------------------
% 0.56/0.76 % (21414)Version: Vampire 4.8 (commit 8e9376e55 on 2024-01-18 13:49:33 +0100)
% 0.56/0.76 % (21414)Termination reason: Refutation not found, incomplete strategy
% 0.56/0.76
% 0.56/0.76 % (21414)Memory used [KB]: 948
% 0.56/0.76 % (21414)Time elapsed: 0.002 s
% 0.56/0.76 % (21414)Instructions burned: 2 (million)
% 0.56/0.76 % (21414)------------------------------
% 0.56/0.76 % (21414)------------------------------
% 0.56/0.76 % (21417)Refutation not found, incomplete strategy% (21417)------------------------------
% 0.56/0.76 % (21417)Version: Vampire 4.8 (commit 8e9376e55 on 2024-01-18 13:49:33 +0100)
% 0.56/0.76 % (21417)Termination reason: Refutation not found, incomplete strategy
% 0.56/0.76
% 0.56/0.76 % (21417)Memory used [KB]: 949
% 0.56/0.76 % (21417)Time elapsed: 0.003 s
% 0.56/0.76 % (21417)Instructions burned: 2 (million)
% 0.56/0.76 % (21417)------------------------------
% 0.56/0.76 % (21417)------------------------------
% 0.56/0.76 % (21418)lrs+1011_87677:1048576_sil=8000:sos=on:spb=non_intro:nwc=10.0:kmz=on:i=42:ep=RS:nm=0:ins=1:uhcvi=on:rawr=on:fde=unused:afp=2000:afq=1.444:plsq=on:nicw=on_0 on Vampire---4 for (2996ds/42Mi)
% 0.56/0.76 % (21418)Refutation not found, incomplete strategy% (21418)------------------------------
% 0.56/0.76 % (21418)Version: Vampire 4.8 (commit 8e9376e55 on 2024-01-18 13:49:33 +0100)
% 0.56/0.76 % (21418)Termination reason: Refutation not found, incomplete strategy
% 0.56/0.76
% 0.56/0.76 % (21418)Memory used [KB]: 948
% 0.56/0.76 % (21418)Time elapsed: 0.002 s
% 0.56/0.76 % (21418)Instructions burned: 2 (million)
% 0.56/0.76 % (21418)------------------------------
% 0.56/0.76 % (21418)------------------------------
% 0.56/0.76 % (21413)First to succeed.
% 0.63/0.76 % (21413)Refutation found. Thanks to Tanya!
% 0.63/0.76 % SZS status Unsatisfiable for Vampire---4
% 0.63/0.76 % SZS output start Proof for Vampire---4
% See solution above
% 0.63/0.76 % (21413)------------------------------
% 0.63/0.76 % (21413)Version: Vampire 4.8 (commit 8e9376e55 on 2024-01-18 13:49:33 +0100)
% 0.63/0.76 % (21413)Termination reason: Refutation
% 0.63/0.76
% 0.63/0.76 % (21413)Memory used [KB]: 1066
% 0.63/0.76 % (21413)Time elapsed: 0.008 s
% 0.63/0.76 % (21413)Instructions burned: 21 (million)
% 0.63/0.76 % (21413)------------------------------
% 0.63/0.76 % (21413)------------------------------
% 0.63/0.76 % (21398)Success in time 0.388 s
% 0.63/0.76 % Vampire---4.8 exiting
%------------------------------------------------------------------------------