TSTP Solution File: SWW432-1 by SnakeForV-SAT---1.0
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- Process Solution
%------------------------------------------------------------------------------
% File : SnakeForV-SAT---1.0
% Problem : SWW432-1 : TPTP v8.1.0. Released v5.2.0.
% Transfm : none
% Format : tptp:raw
% Command : vampire --input_syntax tptp --proof tptp --output_axiom_names on --mode portfolio --schedule snake_tptp_sat --cores 0 -t %d %s
% Computer : n015.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 Aug 31 19:19:23 EDT 2022
% Result : Satisfiable 1.69s 0.61s
% Output : FiniteModel 1.69s
% Verified :
% SZS Type : -
% Comments :
%------------------------------------------------------------------------------
%----WARNING: Could not form TPTP format derivation
%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.03/0.12 % Problem : SWW432-1 : TPTP v8.1.0. Released v5.2.0.
% 0.03/0.13 % Command : vampire --input_syntax tptp --proof tptp --output_axiom_names on --mode portfolio --schedule snake_tptp_sat --cores 0 -t %d %s
% 0.13/0.34 % Computer : n015.cluster.edu
% 0.13/0.34 % Model : x86_64 x86_64
% 0.13/0.34 % CPU : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz
% 0.13/0.34 % Memory : 8042.1875MB
% 0.13/0.34 % OS : Linux 3.10.0-693.el7.x86_64
% 0.13/0.34 % CPULimit : 300
% 0.13/0.34 % WCLimit : 300
% 0.13/0.34 % DateTime : Tue Aug 30 20:48:06 EDT 2022
% 0.13/0.34 % CPUTime :
% 0.19/0.49 % (949)ott+4_1:1_av=off:bd=off:nwc=5.0:s2a=on:s2at=2.0:slsq=on:slsqc=2:slsql=off:slsqr=1,2:sp=frequency:i=37:si=on:rawr=on:rtra=on_0 on theBenchmark for (2999ds/37Mi)
% 0.19/0.49 % (952)ott+33_1:4_s2a=on:tgt=ground:i=51:si=on:rawr=on:rtra=on_0 on theBenchmark for (2999ds/51Mi)
% 0.19/0.49 % (953)dis+34_1:32_abs=on:add=off:bsr=on:gsp=on:sp=weighted_frequency:i=48:si=on:rawr=on:rtra=on_0 on theBenchmark for (2999ds/48Mi)
% 0.19/0.50 % (980)dis+21_1:1_av=off:er=filter:slsq=on:slsqc=0:slsqr=1,1:sp=frequency:to=lpo:i=498:si=on:rawr=on:rtra=on_0 on theBenchmark for (2999ds/498Mi)
% 0.19/0.50 % (985)ott+11_2:3_av=off:fde=unused:nwc=5.0:tgt=ground:i=177:si=on:rawr=on:rtra=on_0 on theBenchmark for (2999ds/177Mi)
% 0.19/0.50 % (979)ott+3_1:1_gsp=on:lcm=predicate:i=138:si=on:rawr=on:rtra=on_0 on theBenchmark for (2999ds/138Mi)
% 0.19/0.51 % (960)ott+10_1:32_bd=off:fsr=off:newcnf=on:tgt=full:i=100:si=on:rawr=on:rtra=on_0 on theBenchmark for (2999ds/100Mi)
% 0.19/0.51 % (971)ins+10_1:1_awrs=decay:awrsf=30:bsr=unit_only:foolp=on:igrr=8/457:igs=10:igwr=on:nwc=1.5:sp=weighted_frequency:to=lpo:uhcvi=on:i=68:si=on:rawr=on:rtra=on_0 on theBenchmark for (2999ds/68Mi)
% 0.19/0.51 % (962)ott+10_1:5_bd=off:tgt=full:i=99:si=on:rawr=on:rtra=on_0 on theBenchmark for (2999ds/99Mi)
% 0.19/0.51 % (947)fmb+10_1:1_bce=on:fmbsr=1.5:nm=4:skr=on:i=191324:si=on:rawr=on:rtra=on_0 on theBenchmark for (2999ds/191324Mi)
% 0.19/0.51 % (978)ott+10_1:8_bsd=on:fsd=on:lcm=predicate:nwc=5.0:s2a=on:s2at=1.5:spb=goal_then_units:i=176:si=on:rawr=on:rtra=on_0 on theBenchmark for (2999ds/176Mi)
% 0.19/0.53 % (984)ins+10_1:1_awrs=decay:awrsf=30:bsr=unit_only:foolp=on:igrr=8/457:igs=10:igwr=on:nwc=1.5:sp=weighted_frequency:to=lpo:uhcvi=on:i=68:si=on:rawr=on:rtra=on_0 on theBenchmark for (2999ds/68Mi)
% 0.19/0.53 % (983)ott+10_1:5_bd=off:tgt=full:i=500:si=on:rawr=on:rtra=on_0 on theBenchmark for (2999ds/500Mi)
% 0.19/0.53 % (981)ott+11_1:1_drc=off:nwc=5.0:slsq=on:slsqc=1:spb=goal_then_units:to=lpo:i=467:si=on:rawr=on:rtra=on_0 on theBenchmark for (2999ds/467Mi)
% 0.19/0.53 % (950)ott+10_1:32_bd=off:fsr=off:newcnf=on:tgt=full:i=51:si=on:rawr=on:rtra=on_0 on theBenchmark for (2999ds/51Mi)
% 0.19/0.53 % (955)fmb+10_1:1_fmbsr=2.0:nm=4:skr=on:i=51:si=on:rawr=on:rtra=on_0 on theBenchmark for (2999ds/51Mi)
% 0.19/0.53 % (977)ott+4_1:1_av=off:bd=off:nwc=5.0:rp=on:s2a=on:s2at=2.0:slsq=on:slsqc=2:slsql=off:slsqr=1,2:sp=frequency:i=100:si=on:rawr=on:rtra=on_0 on theBenchmark for (2999ds/100Mi)
% 0.19/0.53 % (948)ott+10_1:32_abs=on:br=off:urr=ec_only:i=50:si=on:rawr=on:rtra=on_0 on theBenchmark for (2999ds/50Mi)
% 0.19/0.53 % (961)ott+10_1:28_bd=off:bs=on:tgt=ground:i=101:si=on:rawr=on:rtra=on_0 on theBenchmark for (2999ds/101Mi)
% 0.19/0.53 % (982)ott+10_1:1_kws=precedence:tgt=ground:i=482:si=on:rawr=on:rtra=on_0 on theBenchmark for (2999ds/482Mi)
% 0.19/0.53 % (975)fmb+10_1:1_bce=on:i=59:si=on:rawr=on:rtra=on_0 on theBenchmark for (2999ds/59Mi)
% 0.19/0.53 % (973)dis+34_1:32_abs=on:add=off:bsr=on:gsp=on:sp=weighted_frequency:i=99:si=on:rawr=on:rtra=on_0 on theBenchmark for (2999ds/99Mi)
% 0.19/0.53 % (957)dis+2_1:64_add=large:bce=on:bd=off:i=2:si=on:rawr=on:rtra=on_0 on theBenchmark for (2999ds/2Mi)
% 0.19/0.53 TRYING [1]
% 0.19/0.53 % (987)ott+10_7:2_awrs=decay:awrsf=8:bd=preordered:drc=off:fd=preordered:fde=unused:fsr=off:slsq=on:slsqc=2:slsqr=5,8:sp=const_min:spb=units:to=lpo:i=355:si=on:rawr=on:rtra=on_0 on theBenchmark for (2999ds/355Mi)
% 0.19/0.54 % (956)dis+10_1:1_fsd=on:sp=occurrence:i=7:si=on:rawr=on:rtra=on_0 on theBenchmark for (2999ds/7Mi)
% 0.19/0.54 % (986)ott+33_1:4_s2a=on:tgt=ground:i=439:si=on:rawr=on:rtra=on_0 on theBenchmark for (2999ds/439Mi)
% 0.19/0.54 % (972)ott+11_2:3_av=off:fde=unused:nwc=5.0:tgt=ground:i=75:si=on:rawr=on:rtra=on_0 on theBenchmark for (2999ds/75Mi)
% 0.19/0.54 TRYING [2]
% 0.19/0.54 % (959)ott+2_1:1_fsr=off:gsp=on:i=50:si=on:rawr=on:rtra=on_0 on theBenchmark for (2999ds/50Mi)
% 1.45/0.54 % (976)ott+10_1:1_tgt=ground:i=100:si=on:rawr=on:rtra=on_0 on theBenchmark for (2999ds/100Mi)
% 1.45/0.54 % (958)ott-1_1:6_av=off:cond=on:fsr=off:nwc=3.0:i=51:si=on:rawr=on:rtra=on_0 on theBenchmark for (2999ds/51Mi)
% 1.45/0.54 TRYING [1]
% 1.45/0.54 TRYING [3]
% 1.45/0.54 TRYING [1]
% 1.45/0.54 TRYING [2]
% 1.45/0.55 % (956)Instruction limit reached!
% 1.45/0.55 % (956)------------------------------
% 1.45/0.55 % (956)Version: Vampire 4.7 (commit 807e37dd9 on 2022-08-23 09:55:27 +0200)
% 1.45/0.55 % (956)Linked with Z3 4.8.13.0 f03d756e086f81f2596157241e0decfb1c982299 z3-4.8.4-5390-gf03d756e0
% 1.45/0.55 % (956)Termination reason: Unknown
% 1.45/0.55 % (956)Termination phase: Saturation
% 1.45/0.55
% 1.45/0.55 % (956)Memory used [KB]: 5500
% 1.45/0.55 % (956)Time elapsed: 0.114 s
% 1.45/0.55 % (956)Instructions burned: 7 (million)
% 1.45/0.55 % (956)------------------------------
% 1.45/0.55 % (956)------------------------------
% 1.45/0.55 % (952)Instruction limit reached!
% 1.45/0.55 % (952)------------------------------
% 1.45/0.55 % (952)Version: Vampire 4.7 (commit 807e37dd9 on 2022-08-23 09:55:27 +0200)
% 1.45/0.55 % (952)Linked with Z3 4.8.13.0 f03d756e086f81f2596157241e0decfb1c982299 z3-4.8.4-5390-gf03d756e0
% 1.45/0.55 % (952)Termination reason: Unknown
% 1.45/0.55 % (952)Termination phase: Saturation
% 1.45/0.55
% 1.45/0.55 % (952)Memory used [KB]: 6524
% 1.45/0.55 % (952)Time elapsed: 0.162 s
% 1.45/0.55 % (952)Instructions burned: 53 (million)
% 1.45/0.55 % (952)------------------------------
% 1.45/0.55 % (952)------------------------------
% 1.45/0.55 % (953)Instruction limit reached!
% 1.45/0.55 % (953)------------------------------
% 1.45/0.55 % (953)Version: Vampire 4.7 (commit 807e37dd9 on 2022-08-23 09:55:27 +0200)
% 1.45/0.55 % (953)Linked with Z3 4.8.13.0 f03d756e086f81f2596157241e0decfb1c982299 z3-4.8.4-5390-gf03d756e0
% 1.45/0.55 % (953)Termination reason: Unknown
% 1.45/0.55 % (953)Termination phase: Saturation
% 1.45/0.55
% 1.45/0.55 % (953)Memory used [KB]: 6524
% 1.45/0.55 % (953)Time elapsed: 0.141 s
% 1.45/0.55 % (953)Instructions burned: 48 (million)
% 1.45/0.55 % (953)------------------------------
% 1.45/0.55 % (953)------------------------------
% 1.45/0.56 TRYING [3]
% 1.45/0.56 TRYING [2]
% 1.45/0.56 % (949)Instruction limit reached!
% 1.45/0.56 % (949)------------------------------
% 1.45/0.56 % (949)Version: Vampire 4.7 (commit 807e37dd9 on 2022-08-23 09:55:27 +0200)
% 1.45/0.56 % (949)Linked with Z3 4.8.13.0 f03d756e086f81f2596157241e0decfb1c982299 z3-4.8.4-5390-gf03d756e0
% 1.45/0.56 % (949)Termination reason: Unknown
% 1.45/0.56 % (949)Termination phase: Saturation
% 1.45/0.56
% 1.45/0.56 % (949)Memory used [KB]: 2046
% 1.45/0.56 % (949)Time elapsed: 0.148 s
% 1.45/0.56 % (949)Instructions burned: 37 (million)
% 1.45/0.56 % (949)------------------------------
% 1.45/0.56 % (949)------------------------------
% 1.45/0.56 % (957)Instruction limit reached!
% 1.45/0.56 % (957)------------------------------
% 1.45/0.56 % (957)Version: Vampire 4.7 (commit 807e37dd9 on 2022-08-23 09:55:27 +0200)
% 1.45/0.56 % (957)Linked with Z3 4.8.13.0 f03d756e086f81f2596157241e0decfb1c982299 z3-4.8.4-5390-gf03d756e0
% 1.45/0.56 % (957)Termination reason: Unknown
% 1.45/0.56 % (957)Termination phase: Saturation
% 1.45/0.56
% 1.45/0.56 % (957)Memory used [KB]: 5373
% 1.45/0.56 % (957)Time elapsed: 0.159 s
% 1.45/0.56 % (957)Instructions burned: 3 (million)
% 1.45/0.56 % (957)------------------------------
% 1.45/0.56 % (957)------------------------------
% 1.45/0.56 TRYING [3]
% 1.69/0.58 % (971)Instruction limit reached!
% 1.69/0.58 % (971)------------------------------
% 1.69/0.58 % (971)Version: Vampire 4.7 (commit 807e37dd9 on 2022-08-23 09:55:27 +0200)
% 1.69/0.58 % (971)Linked with Z3 4.8.13.0 f03d756e086f81f2596157241e0decfb1c982299 z3-4.8.4-5390-gf03d756e0
% 1.69/0.58 % (971)Termination reason: Unknown
% 1.69/0.58 % (971)Termination phase: Saturation
% 1.69/0.58
% 1.69/0.58 % (971)Memory used [KB]: 7036
% 1.69/0.58 % (971)Time elapsed: 0.041 s
% 1.69/0.58 % (971)Instructions burned: 68 (million)
% 1.69/0.58 % (971)------------------------------
% 1.69/0.58 % (971)------------------------------
% 1.69/0.60 % (948)Instruction limit reached!
% 1.69/0.60 % (948)------------------------------
% 1.69/0.60 % (948)Version: Vampire 4.7 (commit 807e37dd9 on 2022-08-23 09:55:27 +0200)
% 1.69/0.60 % (948)Linked with Z3 4.8.13.0 f03d756e086f81f2596157241e0decfb1c982299 z3-4.8.4-5390-gf03d756e0
% 1.69/0.60 % (948)Termination reason: Unknown
% 1.69/0.60 % (948)Termination phase: Saturation
% 1.69/0.60
% 1.69/0.60 % (948)Memory used [KB]: 6524
% 1.69/0.60 % (948)Time elapsed: 0.195 s
% 1.69/0.60 % (948)Instructions burned: 50 (million)
% 1.69/0.60 % (948)------------------------------
% 1.69/0.60 % (948)------------------------------
% 1.69/0.60 % (950)Instruction limit reached!
% 1.69/0.60 % (950)------------------------------
% 1.69/0.60 % (950)Version: Vampire 4.7 (commit 807e37dd9 on 2022-08-23 09:55:27 +0200)
% 1.69/0.60 % (950)Linked with Z3 4.8.13.0 f03d756e086f81f2596157241e0decfb1c982299 z3-4.8.4-5390-gf03d756e0
% 1.69/0.60 % (950)Termination reason: Unknown
% 1.69/0.60 % (950)Termination phase: Saturation
% 1.69/0.60
% 1.69/0.60 % (950)Memory used [KB]: 6396
% 1.69/0.60 % (950)Time elapsed: 0.201 s
% 1.69/0.60 % (950)Instructions burned: 51 (million)
% 1.69/0.60 % (950)------------------------------
% 1.69/0.60 % (950)------------------------------
% 1.69/0.61 % (955)Instruction limit reached!
% 1.69/0.61 % (955)------------------------------
% 1.69/0.61 % (955)Version: Vampire 4.7 (commit 807e37dd9 on 2022-08-23 09:55:27 +0200)
% 1.69/0.61 % (955)Linked with Z3 4.8.13.0 f03d756e086f81f2596157241e0decfb1c982299 z3-4.8.4-5390-gf03d756e0
% 1.69/0.61 % (955)Termination reason: Unknown
% 1.69/0.61 % (955)Termination phase: Finite model building SAT solving
% 1.69/0.61
% 1.69/0.61 % (955)Memory used [KB]: 7803
% 1.69/0.61 % (955)Time elapsed: 0.162 s
% 1.69/0.61 % (955)Instructions burned: 53 (million)
% 1.69/0.61 % (955)------------------------------
% 1.69/0.61 % (955)------------------------------
% 1.69/0.61 % (958)Instruction limit reached!
% 1.69/0.61 % (958)------------------------------
% 1.69/0.61 % (958)Version: Vampire 4.7 (commit 807e37dd9 on 2022-08-23 09:55:27 +0200)
% 1.69/0.61 % (975)Instruction limit reached!
% 1.69/0.61 % (975)------------------------------
% 1.69/0.61 % (975)Version: Vampire 4.7 (commit 807e37dd9 on 2022-08-23 09:55:27 +0200)
% 1.69/0.61 % (975)Linked with Z3 4.8.13.0 f03d756e086f81f2596157241e0decfb1c982299 z3-4.8.4-5390-gf03d756e0
% 1.69/0.61 % (975)Termination reason: Unknown
% 1.69/0.61 % (975)Termination phase: Finite model building SAT solving
% 1.69/0.61
% 1.69/0.61 % (975)Memory used [KB]: 8059
% 1.69/0.61 % (975)Time elapsed: 0.179 s
% 1.69/0.61 % (975)Instructions burned: 62 (million)
% 1.69/0.61 % (975)------------------------------
% 1.69/0.61 % (975)------------------------------
% 1.69/0.61 Finite Model Found!
% 1.69/0.61 % SZS status Satisfiable for theBenchmark
% 1.69/0.61 % (947)First to succeed.
% 1.69/0.62 % SZS output start FiniteModel for theBenchmark
% 1.69/0.62 tff(declare_$i,type,$i:$tType).
% 1.69/0.62 tff(declare_$i1,type,nil:$i).
% 1.69/0.62 tff(declare_$i2,type,x1:$i).
% 1.69/0.62 tff(declare_$i3,type,x4:$i).
% 1.69/0.62 tff(finite_domain,axiom,
% 1.69/0.62 ! [X:$i] : (
% 1.69/0.62 X = nil | X = x1 | X = x4
% 1.69/0.62 ) ).
% 1.69/0.62
% 1.69/0.62 tff(distinct_domain,axiom,
% 1.69/0.62 nil != x1 & nil != x4 & x1 != x4
% 1.69/0.62 ).
% 1.69/0.62
% 1.69/0.62 tff(declare_bool,type,$o:$tType).
% 1.69/0.62 tff(declare_bool1,type,fmb_bool_1:$o).
% 1.69/0.62 tff(finite_domain,axiom,
% 1.69/0.62 ! [X:$o] : (
% 1.69/0.62 X = fmb_bool_1
% 1.69/0.62 ) ).
% 1.69/0.62
% 1.69/0.62 tff(declare_x6,type,x6:$i).
% 1.69/0.62 tff(x6_definition,axiom,x6 = nil).
% 1.69/0.62 tff(declare_x7,type,x7:$i).
% 1.69/0.62 tff(x7_definition,axiom,x7 = nil).
% 1.69/0.62 tff(declare_x12,type,x12:$i).
% 1.69/0.62 tff(x12_definition,axiom,x12 = x1).
% 1.69/0.62 tff(declare_x2,type,x2:$i).
% 1.69/0.62 tff(x2_definition,axiom,x2 = x1).
% 1.69/0.62 tff(declare_x9,type,x9:$i).
% 1.69/0.62 tff(x9_definition,axiom,x9 = x4).
% 1.69/0.62 tff(declare_x5,type,x5:$i).
% 1.69/0.62 tff(x5_definition,axiom,x5 = x1).
% 1.69/0.62 tff(declare_x13,type,x13:$i).
% 1.69/0.62 tff(x13_definition,axiom,x13 = x4).
% 1.69/0.62 tff(declare_x8,type,x8:$i).
% 1.69/0.62 tff(x8_definition,axiom,x8 = nil).
% 1.69/0.62 tff(declare_x3,type,x3:$i).
% 1.69/0.62 tff(x3_definition,axiom,x3 = nil).
% 1.69/0.62 tff(declare_x11,type,x11:$i).
% 1.69/0.62 tff(x11_definition,axiom,x11 = nil).
% 1.69/0.62 tff(declare_x10,type,x10:$i).
% 1.69/0.62 tff(x10_definition,axiom,x10 = nil).
% 1.69/0.62 tff(declare_emp,type,emp:$i).
% 1.69/0.62 tff(emp_definition,axiom,emp = nil).
% 1.69/0.62 tff(declare_sep,type,sep: $i * $i > $i).
% 1.69/0.62 tff(function_sep,axiom,
% 1.69/0.62 sep(nil,nil) = x4
% 1.69/0.62 & sep(nil,x1) = x1
% 1.69/0.62 & sep(nil,x4) = x1
% 1.69/0.62 & sep(x1,nil) = nil
% 1.69/0.62 & sep(x1,x1) = x1
% 1.69/0.62 & sep(x1,x4) = x4
% 1.69/0.62 & sep(x4,nil) = x1
% 1.69/0.62 & sep(x4,x1) = x1
% 1.69/0.62 & sep(x4,x4) = x1
% 1.69/0.62
% 1.69/0.62 ).
% 1.69/0.62
% 1.69/0.62 tff(declare_lseg,type,lseg: $i * $i > $i).
% 1.69/0.62 tff(function_lseg,axiom,
% 1.69/0.62 lseg(nil,nil) = x1
% 1.69/0.62 & lseg(nil,x1) = x4
% 1.69/0.62 & lseg(nil,x4) = x4
% 1.69/0.62 & lseg(x1,nil) = nil
% 1.69/0.62 & lseg(x1,x1) = x1
% 1.69/0.62 & lseg(x1,x4) = nil
% 1.69/0.62 & lseg(x4,nil) = nil
% 1.69/0.62 & lseg(x4,x1) = nil
% 1.69/0.62 & lseg(x4,x4) = x1
% 1.69/0.62
% 1.69/0.62 ).
% 1.69/0.62
% 1.69/0.62 tff(declare_next,type,next: $i * $i > $i).
% 1.69/0.62 tff(function_next,axiom,
% 1.69/0.62 next(nil,nil) = x4
% 1.69/0.62 & next(nil,x1) = x4
% 1.69/0.62 & next(nil,x4) = x4
% 1.69/0.62 & next(x1,nil) = nil
% 1.69/0.62 & next(x1,x1) = nil
% 1.69/0.62 & next(x1,x4) = nil
% 1.69/0.62 & next(x4,nil) = x4
% 1.69/0.62 & next(x4,x1) = x4
% 1.69/0.62 & next(x4,x4) = x4
% 1.69/0.62
% 1.69/0.62 ).
% 1.69/0.62
% 1.69/0.62 tff(declare_heap,type,heap: $i > $o ).
% 1.69/0.62 tff(predicate_heap,axiom,
% 1.69/0.62 heap(nil)
% 1.69/0.62 & ~heap(x1)
% 1.69/0.62 & heap(x4)
% 1.69/0.62
% 1.69/0.62 ).
% 1.69/0.62
% 1.69/0.62 % SZS output end FiniteModel for theBenchmark
% 1.69/0.62 % (947)------------------------------
% 1.69/0.62 % (947)Version: Vampire 4.7 (commit 807e37dd9 on 2022-08-23 09:55:27 +0200)
% 1.69/0.62 % (947)Linked with Z3 4.8.13.0 f03d756e086f81f2596157241e0decfb1c982299 z3-4.8.4-5390-gf03d756e0
% 1.69/0.62 % (947)Termination reason: Satisfiable
% 1.69/0.62
% 1.69/0.62 % (947)Memory used [KB]: 8059
% 1.69/0.62 % (947)Time elapsed: 0.158 s
% 1.69/0.62 % (947)Instructions burned: 66 (million)
% 1.69/0.62 % (947)------------------------------
% 1.69/0.62 % (947)------------------------------
% 1.69/0.62 % (946)Success in time 0.264 s
%------------------------------------------------------------------------------