TSTP Solution File: PLA031-1.019 by Vampire-SAT---4.8

View Problem - Process Solution

%------------------------------------------------------------------------------
% File     : Vampire-SAT---4.8
% Problem  : PLA031-1.019 : TPTP v8.1.2. Released v5.2.0.
% Transfm  : none
% Format   : tptp:raw
% Command  : vampire --ignore_missing on --mode portfolio/casc [--schedule casc_hol_2020] -p tptp -om szs -t %d %s

% Computer : n004.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 : Fri Sep  1 21:07:23 EDT 2023

% Result   : Timeout 300.38s 43.40s
% Output   : None 
% Verified : 
% SZS Type : -

% Comments : 
%------------------------------------------------------------------------------
%----No solution output by system
%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.12/0.37  % Problem    : PLA031-1.019 : TPTP v8.1.2. Released v5.2.0.
% 0.12/0.38  % Command    : vampire --ignore_missing on --mode portfolio/casc [--schedule casc_hol_2020] -p tptp -om szs -t %d %s
% 0.37/0.59  % Computer : n004.cluster.edu
% 0.37/0.59  % Model    : x86_64 x86_64
% 0.37/0.59  % CPU      : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz
% 0.37/0.59  % Memory   : 8042.1875MB
% 0.37/0.59  % OS       : Linux 3.10.0-693.el7.x86_64
% 0.37/0.59  % CPULimit   : 300
% 0.37/0.59  % WCLimit    : 300
% 0.37/0.59  % DateTime   : Wed Aug 30 16:05:22 EDT 2023
% 0.37/0.59  % CPUTime    : 
% 0.43/0.61  % (8190)Running in auto input_syntax mode. Trying TPTP
% 0.43/0.65  % (8191)fmb+10_1_fmbas=off:fmbsr=1.3:nm=2_1451 on Vampire---4 for (1451ds/0Mi)
% 0.43/0.65  % (8195)fmb+10_1_bce=on:fmbas=expand:fmbksg=on:fmbsr=1.3_569 on Vampire---4 for (569ds/0Mi)
% 0.43/0.65  % (8196)dis-2_2:3_amm=sco:anc=none:bce=on:fsr=off:gsp=on:nm=16:nwc=1.2:nicw=on:sac=on:sp=weighted_frequency_476 on Vampire---4 for (476ds/0Mi)
% 0.43/0.65  % (8200)dis+1_20_av=off:lcm=predicate:nm=2:nwc=2.0_396 on Vampire---4 for (396ds/0Mi)
% 0.43/0.65  % (8198)fmb+10_1_bce=on:fmbas=expand:fmbksg=on:fmbsr=1.3:gsp=on:nm=4_470 on Vampire---4 for (470ds/0Mi)
% 0.43/0.65  % (8202)dis+11_4:5_nm=4_216 on Vampire---4 for (216ds/0Mi)
% 0.43/0.65  % (8203)fmb+10_1_fmbas=off:fmbsr=1.3:nm=2:si=on:rtra=on:rawr=on:rp=on:fmbksg=on_1451 on Vampire---4 for (1451ds/0Mi)
% 1.17/0.77  Detected minimum model sizes of [1]
% 1.17/0.77  Detected maximum model sizes of [65]
% 1.17/0.77  TRYING [1]
% 1.17/0.78  Cannot represent all propositional literals internally
% 1.17/0.78  % (8195)Refutation not found, incomplete strategy% (8195)------------------------------
% 1.17/0.78  % (8195)Version: Vampire 4.7 (commit 05ef610bd on 2023-06-21 19:03:17 +0100)
% 1.17/0.78  % (8195)Linked with Z3 4.9.1.0 6ed071b44407cf6623b8d3c0dceb2a8fb7040cee z3-4.8.4-6427-g6ed071b44
% 1.17/0.78  % (8195)Termination reason: Refutation not found, incomplete strategy
% 1.17/0.78  
% 1.17/0.78  % (8195)Memory used [KB]: 12537
% 1.17/0.78  % (8195)Time elapsed: 0.130 s
% 1.17/0.78  % (8195)------------------------------
% 1.17/0.78  % (8195)------------------------------
% 1.17/0.79  % (8205)fmb+10_1_bce=on:fmbas=expand:fmbksg=on:fmbsr=1.3:si=on:rtra=on:rawr=on:rp=on:fmbksg=on_569 on Vampire---4 for (569ds/0Mi)
% 1.49/0.82  Detected minimum model sizes of [1]
% 1.49/0.82  Detected maximum model sizes of [65]
% 1.49/0.82  TRYING [1]
% 1.49/0.83  Detected minimum model sizes of [1]
% 1.49/0.83  Detected maximum model sizes of [65]
% 1.49/0.83  TRYING [1]
% 1.49/0.83  Cannot represent all propositional literals internally
% 1.49/0.83  % (8191)Refutation not found, incomplete strategy% (8191)------------------------------
% 1.49/0.83  % (8191)Version: Vampire 4.7 (commit 05ef610bd on 2023-06-21 19:03:17 +0100)
% 1.49/0.83  % (8191)Linked with Z3 4.9.1.0 6ed071b44407cf6623b8d3c0dceb2a8fb7040cee z3-4.8.4-6427-g6ed071b44
% 1.49/0.83  % (8191)Termination reason: Refutation not found, incomplete strategy
% 1.49/0.83  
% 1.49/0.83  % (8191)Memory used [KB]: 11513
% 1.49/0.83  % (8191)Time elapsed: 0.183 s
% 1.49/0.83  % (8191)------------------------------
% 1.49/0.83  % (8191)------------------------------
% 1.49/0.83  WARNING Broken Constraint: if fmb_keep_sbeam_generators(on) has been set then saturation_algorithm(discount) is equal to fmb
% 1.49/0.83  % (8207)dis-2_2:3_amm=sco:anc=none:bce=on:fsr=off:gsp=on:nm=16:nwc=1.2:nicw=on:sac=on:sp=weighted_frequency:si=on:rtra=on:rawr=on:rp=on:fmbksg=on_476 on Vampire---4 for (476ds/0Mi)
% 1.49/0.83  Cannot represent all propositional literals internally
% 1.49/0.83  % (8203)Refutation not found, incomplete strategy% (8203)------------------------------
% 1.49/0.83  % (8203)Version: Vampire 4.7 (commit 05ef610bd on 2023-06-21 19:03:17 +0100)
% 1.49/0.83  % (8203)Linked with Z3 4.9.1.0 6ed071b44407cf6623b8d3c0dceb2a8fb7040cee z3-4.8.4-6427-g6ed071b44
% 1.49/0.83  % (8203)Termination reason: Refutation not found, incomplete strategy
% 1.49/0.83  
% 1.49/0.83  % (8203)Memory used [KB]: 12409
% 1.49/0.83  % (8203)Time elapsed: 0.188 s
% 1.49/0.83  % (8203)------------------------------
% 1.49/0.83  % (8203)------------------------------
% 1.49/0.84  % (8208)fmb+10_1_bce=on:fmbas=expand:fmbksg=on:fmbsr=1.3:gsp=on:nm=4:si=on:rtra=on:rawr=on:rp=on:fmbksg=on_470 on Vampire---4 for (470ds/0Mi)
% 1.74/0.85  Detected minimum model sizes of [1]
% 1.74/0.85  Detected maximum model sizes of [65]
% 1.74/0.85  TRYING [1]
% 1.74/0.86  Cannot represent all propositional literals internally
% 1.74/0.86  % (8198)Refutation not found, incomplete strategy% (8198)------------------------------
% 1.74/0.86  % (8198)Version: Vampire 4.7 (commit 05ef610bd on 2023-06-21 19:03:17 +0100)
% 1.74/0.86  % (8198)Linked with Z3 4.9.1.0 6ed071b44407cf6623b8d3c0dceb2a8fb7040cee z3-4.8.4-6427-g6ed071b44
% 1.74/0.86  % (8198)Termination reason: Refutation not found, incomplete strategy
% 1.74/0.86  
% 1.74/0.86  % (8198)Memory used [KB]: 12537
% 1.74/0.86  % (8198)Time elapsed: 0.217 s
% 1.74/0.86  % (8198)------------------------------
% 1.74/0.86  % (8198)------------------------------
% 1.74/0.87  WARNING Broken Constraint: if fmb_keep_sbeam_generators(on) has been set then saturation_algorithm(discount) is equal to fmb
% 1.74/0.87  % (8210)dis+1_20_av=off:lcm=predicate:nm=2:nwc=2.0:si=on:rtra=on:rawr=on:rp=on:fmbksg=on_396 on Vampire---4 for (396ds/0Mi)
% 1.74/0.91  Detected minimum model sizes of [1]
% 1.74/0.91  Detected maximum model sizes of [65]
% 1.74/0.91  TRYING [1]
% 1.74/0.91  Cannot represent all propositional literals internally
% 1.74/0.91  % (8205)Refutation not found, incomplete strategy% (8205)------------------------------
% 1.74/0.91  % (8205)Version: Vampire 4.7 (commit 05ef610bd on 2023-06-21 19:03:17 +0100)
% 1.74/0.91  % (8205)Linked with Z3 4.9.1.0 6ed071b44407cf6623b8d3c0dceb2a8fb7040cee z3-4.8.4-6427-g6ed071b44
% 1.74/0.91  % (8205)Termination reason: Refutation not found, incomplete strategy
% 1.74/0.91  
% 1.74/0.91  % (8205)Memory used [KB]: 12537
% 1.74/0.91  % (8205)Time elapsed: 0.128 s
% 1.74/0.91  % (8205)------------------------------
% 1.74/0.91  % (8205)------------------------------
% 1.74/0.92  WARNING Broken Constraint: if fmb_keep_sbeam_generators(on) has been set then saturation_algorithm(discount) is equal to fmb
% 1.74/0.92  % (8211)dis+11_4:5_nm=4:si=on:rtra=on:rawr=on:rp=on:fmbksg=on_216 on Vampire---4 for (216ds/0Mi)
% 2.20/0.99  Detected minimum model sizes of [1]
% 2.20/0.99  Detected maximum model sizes of [65]
% 2.20/0.99  TRYING [1]
% 2.35/1.00  Cannot represent all propositional literals internally
% 2.35/1.00  % (8208)Refutation not found, incomplete strategy% (8208)------------------------------
% 2.35/1.00  % (8208)Version: Vampire 4.7 (commit 05ef610bd on 2023-06-21 19:03:17 +0100)
% 2.35/1.00  % (8208)Linked with Z3 4.9.1.0 6ed071b44407cf6623b8d3c0dceb2a8fb7040cee z3-4.8.4-6427-g6ed071b44
% 2.35/1.00  % (8208)Termination reason: Refutation not found, incomplete strategy
% 2.35/1.00  
% 2.35/1.00  % (8208)Memory used [KB]: 12537
% 2.35/1.00  % (8208)Time elapsed: 0.161 s
% 2.35/1.00  % (8208)------------------------------
% 2.35/1.00  % (8208)------------------------------
% 2.35/1.00  % (8212)fmb+10_1_fmbas=off:fmbsr=1.3:nm=2_2902 on Vampire---4 for (2902ds/0Mi)
% 2.84/1.12  Detected minimum model sizes of [1]
% 2.84/1.12  Detected maximum model sizes of [65]
% 2.84/1.12  TRYING [1]
% 2.84/1.12  Cannot represent all propositional literals internally
% 2.84/1.12  % (8212)Refutation not found, incomplete strategy% (8212)------------------------------
% 2.84/1.12  % (8212)Version: Vampire 4.7 (commit 05ef610bd on 2023-06-21 19:03:17 +0100)
% 2.84/1.12  % (8212)Linked with Z3 4.9.1.0 6ed071b44407cf6623b8d3c0dceb2a8fb7040cee z3-4.8.4-6427-g6ed071b44
% 2.84/1.12  % (8212)Termination reason: Refutation not found, incomplete strategy
% 2.84/1.12  
% 2.84/1.12  % (8212)Memory used [KB]: 11513
% 2.84/1.12  % (8212)Time elapsed: 0.121 s
% 2.84/1.12  % (8212)------------------------------
% 2.84/1.12  % (8212)------------------------------
% 2.84/1.13  % (8213)fmb+10_1_bce=on:fmbas=expand:fmbksg=on:fmbsr=1.3_1138 on Vampire---4 for (1138ds/0Mi)
% 3.10/1.23  Detected minimum model sizes of [1]
% 3.10/1.23  Detected maximum model sizes of [65]
% 3.10/1.23  TRYING [1]
% 3.10/1.24  Cannot represent all propositional literals internally
% 3.10/1.24  % (8213)Refutation not found, incomplete strategy% (8213)------------------------------
% 3.10/1.24  % (8213)Version: Vampire 4.7 (commit 05ef610bd on 2023-06-21 19:03:17 +0100)
% 3.10/1.24  % (8213)Linked with Z3 4.9.1.0 6ed071b44407cf6623b8d3c0dceb2a8fb7040cee z3-4.8.4-6427-g6ed071b44
% 3.10/1.24  % (8213)Termination reason: Refutation not found, incomplete strategy
% 3.10/1.24  
% 3.10/1.24  % (8213)Memory used [KB]: 12537
% 3.10/1.24  % (8213)Time elapsed: 0.115 s
% 3.10/1.24  % (8213)------------------------------
% 3.10/1.24  % (8213)------------------------------
% 3.51/1.24  % (8214)dis-2_2:3_amm=sco:anc=none:bce=on:fsr=off:gsp=on:nm=16:nwc=1.2:nicw=on:sac=on:sp=weighted_frequency_952 on Vampire---4 for (952ds/0Mi)
% 152.49/22.35  % (8202)Time limit reached!
% 152.49/22.35  % (8202)------------------------------
% 152.49/22.35  % (8202)Version: Vampire 4.7 (commit 05ef610bd on 2023-06-21 19:03:17 +0100)
% 152.49/22.35  % (8202)Linked with Z3 4.9.1.0 6ed071b44407cf6623b8d3c0dceb2a8fb7040cee z3-4.8.4-6427-g6ed071b44
% 152.49/22.35  % (8202)Termination reason: Time limit
% 152.49/22.35  % (8202)Termination phase: Saturation
% 152.49/22.35  
% 152.49/22.35  % (8202)Memory used [KB]: 153387
% 152.49/22.35  % (8202)Time elapsed: 21.700 s
% 152.49/22.35  % (8202)------------------------------
% 152.49/22.35  % (8202)------------------------------
% 152.49/22.36  % (8982)fmb+10_1_bce=on:fmbas=expand:fmbksg=on:fmbsr=1.3:gsp=on:nm=4_940 on Vampire---4 for (940ds/0Mi)
% 152.88/22.49  Detected minimum model sizes of [1]
% 152.88/22.49  Detected maximum model sizes of [65]
% 152.88/22.49  TRYING [1]
% 152.88/22.50  Cannot represent all propositional literals internally
% 152.88/22.50  % (8982)Refutation not found, incomplete strategy% (8982)------------------------------
% 152.88/22.50  % (8982)Version: Vampire 4.7 (commit 05ef610bd on 2023-06-21 19:03:17 +0100)
% 152.88/22.50  % (8982)Linked with Z3 4.9.1.0 6ed071b44407cf6623b8d3c0dceb2a8fb7040cee z3-4.8.4-6427-g6ed071b44
% 152.88/22.50  % (8982)Termination reason: Refutation not found, incomplete strategy
% 152.88/22.50  
% 152.88/22.50  % (8982)Memory used [KB]: 12537
% 152.88/22.50  % (8982)Time elapsed: 0.143 s
% 152.88/22.50  % (8982)------------------------------
% 152.88/22.50  % (8982)------------------------------
% 152.88/22.51  % (8983)dis+1_20_av=off:lcm=predicate:nm=2:nwc=2.0_792 on Vampire---4 for (792ds/0Mi)
% 154.44/22.62  % (8211)Time limit reached!
% 154.44/22.62  % (8211)------------------------------
% 154.44/22.62  % (8211)Version: Vampire 4.7 (commit 05ef610bd on 2023-06-21 19:03:17 +0100)
% 154.44/22.62  % (8211)Linked with Z3 4.9.1.0 6ed071b44407cf6623b8d3c0dceb2a8fb7040cee z3-4.8.4-6427-g6ed071b44
% 154.44/22.62  % (8211)Termination reason: Time limit
% 154.44/22.62  % (8211)Termination phase: Saturation
% 154.44/22.62  
% 154.44/22.62  % (8211)Memory used [KB]: 359354
% 154.44/22.62  % (8211)Time elapsed: 21.700 s
% 154.44/22.62  % (8211)------------------------------
% 154.44/22.62  % (8211)------------------------------
% 154.44/22.65  % (8984)dis+11_4:5_nm=4_432 on Vampire---4 for (432ds/0Mi)
% 279.06/40.35  % (8200)Time limit reached!
% 279.06/40.35  % (8200)------------------------------
% 279.06/40.35  % (8200)Version: Vampire 4.7 (commit 05ef610bd on 2023-06-21 19:03:17 +0100)
% 279.06/40.35  % (8200)Linked with Z3 4.9.1.0 6ed071b44407cf6623b8d3c0dceb2a8fb7040cee z3-4.8.4-6427-g6ed071b44
% 279.06/40.35  % (8200)Termination reason: Time limit
% 279.06/40.35  % (8200)Termination phase: Saturation
% 279.06/40.35  
% 279.06/40.35  % (8200)Memory used [KB]: 266861
% 279.06/40.35  % (8200)Time elapsed: 39.700 s
% 279.06/40.35  % (8200)------------------------------
% 279.06/40.35  % (8200)------------------------------
% 279.06/40.37  % (9649)fmb+10_1_fmbas=off:fmbsr=1.3:nm=2:si=on:rtra=on:rawr=on:rp=on:fmbksg=on_2902 on Vampire---4 for (2602ds/0Mi)
% 279.55/40.48  Detected minimum model sizes of [1]
% 279.55/40.48  Detected maximum model sizes of [65]
% 279.55/40.48  TRYING [1]
% 279.55/40.49  Cannot represent all propositional literals internally
% 279.55/40.49  % (9649)Refutation not found, incomplete strategy% (9649)------------------------------
% 279.55/40.49  % (9649)Version: Vampire 4.7 (commit 05ef610bd on 2023-06-21 19:03:17 +0100)
% 279.55/40.49  % (9649)Linked with Z3 4.9.1.0 6ed071b44407cf6623b8d3c0dceb2a8fb7040cee z3-4.8.4-6427-g6ed071b44
% 279.55/40.49  % (9649)Termination reason: Refutation not found, incomplete strategy
% 279.55/40.49  
% 279.55/40.49  % (9649)Memory used [KB]: 12409
% 279.55/40.49  % (9649)Time elapsed: 0.119 s
% 279.55/40.49  % (9649)------------------------------
% 279.55/40.49  % (9649)------------------------------
% 279.55/40.49  % (9650)fmb+10_1_bce=on:fmbas=expand:fmbksg=on:fmbsr=1.3:si=on:rtra=on:rawr=on:rp=on:fmbksg=on_1138 on Vampire---4 for (1138ds/0Mi)
% 279.55/40.57  % (8210)Time limit reached!
% 279.55/40.57  % (8210)------------------------------
% 279.55/40.57  % (8210)Version: Vampire 4.7 (commit 05ef610bd on 2023-06-21 19:03:17 +0100)
% 279.55/40.57  % (8210)Linked with Z3 4.9.1.0 6ed071b44407cf6623b8d3c0dceb2a8fb7040cee z3-4.8.4-6427-g6ed071b44
% 279.55/40.57  % (8210)Termination reason: Time limit
% 279.55/40.57  % (8210)Termination phase: Saturation
% 279.55/40.57  
% 279.55/40.57  % (8210)Memory used [KB]: 583743
% 279.55/40.57  % (8210)Time elapsed: 39.700 s
% 279.55/40.57  % (8210)------------------------------
% 279.55/40.57  % (8210)------------------------------
% 280.30/40.61  Detected minimum model sizes of [1]
% 280.30/40.61  Detected maximum model sizes of [65]
% 280.30/40.61  TRYING [1]
% 280.30/40.61  WARNING Broken Constraint: if fmb_keep_sbeam_generators(on) has been set then saturation_algorithm(discount) is equal to fmb
% 280.30/40.61  % (9651)dis-2_2:3_amm=sco:anc=none:bce=on:fsr=off:gsp=on:nm=16:nwc=1.2:nicw=on:sac=on:sp=weighted_frequency:si=on:rtra=on:rawr=on:rp=on:fmbksg=on_952 on Vampire---4 for (952ds/0Mi)
% 280.30/40.61  Cannot represent all propositional literals internally
% 280.30/40.61  % (9650)Refutation not found, incomplete strategy% (9650)------------------------------
% 280.30/40.61  % (9650)Version: Vampire 4.7 (commit 05ef610bd on 2023-06-21 19:03:17 +0100)
% 280.30/40.61  % (9650)Linked with Z3 4.9.1.0 6ed071b44407cf6623b8d3c0dceb2a8fb7040cee z3-4.8.4-6427-g6ed071b44
% 280.30/40.61  % (9650)Termination reason: Refutation not found, incomplete strategy
% 280.30/40.61  
% 280.30/40.61  % (9650)Memory used [KB]: 12537
% 280.30/40.61  % (9650)Time elapsed: 0.121 s
% 280.30/40.61  % (9650)------------------------------
% 280.30/40.61  % (9650)------------------------------
% 280.30/40.62  % (9652)fmb+10_1_bce=on:fmbas=expand:fmbksg=on:fmbsr=1.3:gsp=on:nm=4:si=on:rtra=on:rawr=on:rp=on:fmbksg=on_940 on Vampire---4 for (940ds/0Mi)
% 281.66/40.76  Detected minimum model sizes of [1]
% 281.66/40.76  Detected maximum model sizes of [65]
% 281.66/40.76  TRYING [1]
% 281.66/40.76  Cannot represent all propositional literals internally
% 281.66/40.76  % (9652)Refutation not found, incomplete strategy% (9652)------------------------------
% 281.66/40.76  % (9652)Version: Vampire 4.7 (commit 05ef610bd on 2023-06-21 19:03:17 +0100)
% 281.66/40.76  % (9652)Linked with Z3 4.9.1.0 6ed071b44407cf6623b8d3c0dceb2a8fb7040cee z3-4.8.4-6427-g6ed071b44
% 281.66/40.76  % (9652)Termination reason: Refutation not found, incomplete strategy
% 281.66/40.76  
% 281.66/40.76  % (9652)Memory used [KB]: 12537
% 281.66/40.76  % (9652)Time elapsed: 0.148 s
% 281.66/40.76  % (9652)------------------------------
% 281.66/40.76  % (9652)------------------------------
% 281.66/40.77  WARNING Broken Constraint: if fmb_keep_sbeam_generators(on) has been set then saturation_algorithm(discount) is equal to fmb
% 281.66/40.77  % (9653)dis+1_20_av=off:lcm=predicate:nm=2:nwc=2.0:si=on:rtra=on:rawr=on:rp=on:fmbksg=on_792 on Vampire---4 for (792ds/0Mi)
% 300.38/43.40  External time out (SIGXCPU) on /export/starexec/sandbox/tmp/tmp.jWlUfXoAMZ/Vampire---4.8_8070
% 300.38/43.40  External time out (SIGXCPU) on /export/starexec/sandbox/tmp/tmp.jWlUfXoAMZ/Vampire---4.8_8070
% 300.38/43.40  External time out (SIGXCPU) on /export/starexec/sandbox/tmp/tmp.jWlUfXoAMZ/Vampire---4.8_8070
% 300.38/43.40  External time out (SIGXCPU) on /export/starexec/sandbox/tmp/tmp.jWlUfXoAMZ/Vampire---4.8_8070
% 300.38/43.40  External time out (SIGXCPU) on /export/starexec/sandbox/tmp/tmp.jWlUfXoAMZ/Vampire---4.8_8070
% 300.38/43.40  External time out (SIGXCPU) on /export/starexec/sandbox/tmp/tmp.jWlUfXoAMZ/Vampire---4.8_8070
% 300.38/43.40  External time out (SIGXCPU) on /export/starexec/sandbox/tmp/tmp.jWlUfXoAMZ/Vampire---4.8_8070
% 300.38/43.41  External time out (SIGXCPU) on /export/starexec/sandbox/tmp/tmp.jWlUfXoAMZ/Vampire---4.8_8070
% 300.38/43.41  % Vampire---4.8 exiting
%------------------------------------------------------------------------------