%------------------------------------------------------------------------------
% File     : Twee---2.5.0
% Problem  : CSR027-10 : TPTP v8.2.0. Released v7.3.0.
% Transfm  : none
% Format   : tptp:raw
% Command  : parallel-twee /export/starexec/sandbox/benchmark/theBenchmark.p --tstp --conditional-encoding if --smaller --drop-non-horn --give-up-on-saturation --explain-encoding

% 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 : Mon Jun 24 05:27:41 EDT 2024

% Result   : Unsatisfiable 1.36s 0.53s
% Output   : Proof 1.36s
% Verified : 
% SZS Type : -

% Comments : 
%------------------------------------------------------------------------------
%----WARNING: Could not form TPTP format derivation
%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.07/0.12  % Problem  : CSR027-10 : TPTP v8.2.0. Released v7.3.0.
% 0.07/0.12  % Command  : parallel-twee /export/starexec/sandbox/benchmark/theBenchmark.p --tstp --conditional-encoding if --smaller --drop-non-horn --give-up-on-saturation --explain-encoding
% 0.12/0.33  % Computer : n015.cluster.edu
% 0.12/0.33  % Model    : x86_64 x86_64
% 0.12/0.33  % CPU      : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz
% 0.12/0.33  % Memory   : 8042.1875MB
% 0.12/0.33  % OS       : Linux 3.10.0-693.el7.x86_64
% 0.12/0.33  % CPULimit : 300
% 0.12/0.33  % WCLimit  : 300
% 0.12/0.33  % DateTime : Wed Jun 19 22:57:09 EDT 2024
% 0.12/0.33  % CPUTime  : 
% 1.36/0.53  Command-line arguments: --lhs-weight 1 --flip-ordering --normalise-queue-percent 10 --cp-renormalise-threshold 10
% 1.36/0.53  
% 1.36/0.53  % SZS status Unsatisfiable
% 1.36/0.53  
% 1.36/0.53  % SZS output start Proof
% 1.36/0.53  Axiom 1 (query27): mtvisible(c_tptp_spindlecollectormt) = true.
% 1.36/0.53  Axiom 2 (just9): genlmt(c_tptp_spindlecollectormt, c_tptp_member2610_mt) = true.
% 1.36/0.53  Axiom 3 (ifeq_axiom): ifeq3(X, X, Y, Z) = Y.
% 1.36/0.53  Axiom 4 (ifeq_axiom_001): ifeq2(X, X, Y, Z) = Y.
% 1.36/0.53  Axiom 5 (just14): isa(c_tptpnsubcollectionofwithrelationfromtypefnunitvectorintervaldirectionoftranslation_throughoutmovement_translationevent_786, f_subcollectionofwithrelationfromtypefn(c_unitvectorinterval, c_directionoftranslation_throughout, c_movement_translationevent)) = true.
% 1.36/0.53  Axiom 6 (just34): ifeq3(isa(X, c_tptpcol_16_31868), true, tptpcol_16_31868(X), true) = true.
% 1.36/0.53  Axiom 7 (just13): ifeq3(mtvisible(c_tptp_member2610_mt), true, relationallexists(c_tptp_8_875, f_subcollectionofwithrelationfromtypefn(c_unitvectorinterval, c_directionoftranslation_throughout, c_movement_translationevent), c_tptpcol_16_31868), true) = true.
% 1.36/0.53  Axiom 8 (query27_1): ifeq2(tuple2(tptp_8_875(c_tptpnsubcollectionofwithrelationfromtypefnunitvectorintervaldirectionoftranslation_throughoutmovement_translationevent_786, X), tptpcol_16_31868(X)), tuple2(true, true), a, b) = b.
% 1.36/0.53  Axiom 9 (just63): ifeq3(genlmt(X, Y), true, ifeq3(mtvisible(X), true, mtvisible(Y), true), true) = true.
% 1.36/0.53  Axiom 10 (just1): ifeq3(relationallexists(X, Y, Z), true, ifeq3(isa(W, Y), true, isa(f_relationallexistsfn(W, X, Y, Z), Z), true), true) = true.
% 1.36/0.54  Axiom 11 (just12): ifeq3(mtvisible(c_tptp_member2610_mt), true, ifeq3(isa(X, f_subcollectionofwithrelationfromtypefn(c_unitvectorinterval, c_directionoftranslation_throughout, c_movement_translationevent)), true, tptp_8_875(X, f_relationallexistsfn(X, c_tptp_8_875, f_subcollectionofwithrelationfromtypefn(c_unitvectorinterval, c_directionoftranslation_throughout, c_movement_translationevent), c_tptpcol_16_31868)), true), true) = true.
% 1.36/0.54  
% 1.36/0.54  Lemma 12: mtvisible(c_tptp_member2610_mt) = true.
% 1.36/0.54  Proof:
% 1.36/0.54    mtvisible(c_tptp_member2610_mt)
% 1.36/0.54  = { by axiom 3 (ifeq_axiom) R->L }
% 1.36/0.54    ifeq3(true, true, mtvisible(c_tptp_member2610_mt), true)
% 1.36/0.54  = { by axiom 1 (query27) R->L }
% 1.36/0.54    ifeq3(mtvisible(c_tptp_spindlecollectormt), true, mtvisible(c_tptp_member2610_mt), true)
% 1.36/0.54  = { by axiom 3 (ifeq_axiom) R->L }
% 1.36/0.54    ifeq3(true, true, ifeq3(mtvisible(c_tptp_spindlecollectormt), true, mtvisible(c_tptp_member2610_mt), true), true)
% 1.36/0.54  = { by axiom 2 (just9) R->L }
% 1.36/0.54    ifeq3(genlmt(c_tptp_spindlecollectormt, c_tptp_member2610_mt), true, ifeq3(mtvisible(c_tptp_spindlecollectormt), true, mtvisible(c_tptp_member2610_mt), true), true)
% 1.36/0.54  = { by axiom 9 (just63) }
% 1.36/0.54    true
% 1.36/0.54  
% 1.36/0.54  Goal 1 (goal): a = b.
% 1.36/0.54  Proof:
% 1.36/0.54    a
% 1.36/0.54  = { by axiom 4 (ifeq_axiom_001) R->L }
% 1.36/0.54    ifeq2(tuple2(true, true), tuple2(true, true), a, b)
% 1.36/0.54  = { by axiom 11 (just12) R->L }
% 1.36/0.54    ifeq2(tuple2(ifeq3(mtvisible(c_tptp_member2610_mt), true, ifeq3(isa(c_tptpnsubcollectionofwithrelationfromtypefnunitvectorintervaldirectionoftranslation_throughoutmovement_translationevent_786, f_subcollectionofwithrelationfromtypefn(c_unitvectorinterval, c_directionoftranslation_throughout, c_movement_translationevent)), true, tptp_8_875(c_tptpnsubcollectionofwithrelationfromtypefnunitvectorintervaldirectionoftranslation_throughoutmovement_translationevent_786, f_relationallexistsfn(c_tptpnsubcollectionofwithrelationfromtypefnunitvectorintervaldirectionoftranslation_throughoutmovement_translationevent_786, c_tptp_8_875, f_subcollectionofwithrelationfromtypefn(c_unitvectorinterval, c_directionoftranslation_throughout, c_movement_translationevent), c_tptpcol_16_31868)), true), true), true), tuple2(true, true), a, b)
% 1.36/0.54  = { by axiom 5 (just14) }
% 1.36/0.54    ifeq2(tuple2(ifeq3(mtvisible(c_tptp_member2610_mt), true, ifeq3(true, true, tptp_8_875(c_tptpnsubcollectionofwithrelationfromtypefnunitvectorintervaldirectionoftranslation_throughoutmovement_translationevent_786, f_relationallexistsfn(c_tptpnsubcollectionofwithrelationfromtypefnunitvectorintervaldirectionoftranslation_throughoutmovement_translationevent_786, c_tptp_8_875, f_subcollectionofwithrelationfromtypefn(c_unitvectorinterval, c_directionoftranslation_throughout, c_movement_translationevent), c_tptpcol_16_31868)), true), true), true), tuple2(true, true), a, b)
% 1.36/0.54  = { by lemma 12 }
% 1.36/0.54    ifeq2(tuple2(ifeq3(true, true, ifeq3(true, true, tptp_8_875(c_tptpnsubcollectionofwithrelationfromtypefnunitvectorintervaldirectionoftranslation_throughoutmovement_translationevent_786, f_relationallexistsfn(c_tptpnsubcollectionofwithrelationfromtypefnunitvectorintervaldirectionoftranslation_throughoutmovement_translationevent_786, c_tptp_8_875, f_subcollectionofwithrelationfromtypefn(c_unitvectorinterval, c_directionoftranslation_throughout, c_movement_translationevent), c_tptpcol_16_31868)), true), true), true), tuple2(true, true), a, b)
% 1.36/0.54  = { by axiom 3 (ifeq_axiom) }
% 1.36/0.54    ifeq2(tuple2(ifeq3(true, true, tptp_8_875(c_tptpnsubcollectionofwithrelationfromtypefnunitvectorintervaldirectionoftranslation_throughoutmovement_translationevent_786, f_relationallexistsfn(c_tptpnsubcollectionofwithrelationfromtypefnunitvectorintervaldirectionoftranslation_throughoutmovement_translationevent_786, c_tptp_8_875, f_subcollectionofwithrelationfromtypefn(c_unitvectorinterval, c_directionoftranslation_throughout, c_movement_translationevent), c_tptpcol_16_31868)), true), true), tuple2(true, true), a, b)
% 1.36/0.54  = { by axiom 3 (ifeq_axiom) }
% 1.36/0.54    ifeq2(tuple2(tptp_8_875(c_tptpnsubcollectionofwithrelationfromtypefnunitvectorintervaldirectionoftranslation_throughoutmovement_translationevent_786, f_relationallexistsfn(c_tptpnsubcollectionofwithrelationfromtypefnunitvectorintervaldirectionoftranslation_throughoutmovement_translationevent_786, c_tptp_8_875, f_subcollectionofwithrelationfromtypefn(c_unitvectorinterval, c_directionoftranslation_throughout, c_movement_translationevent), c_tptpcol_16_31868)), true), tuple2(true, true), a, b)
% 1.36/0.54  = { by axiom 6 (just34) R->L }
% 1.36/0.54    ifeq2(tuple2(tptp_8_875(c_tptpnsubcollectionofwithrelationfromtypefnunitvectorintervaldirectionoftranslation_throughoutmovement_translationevent_786, f_relationallexistsfn(c_tptpnsubcollectionofwithrelationfromtypefnunitvectorintervaldirectionoftranslation_throughoutmovement_translationevent_786, c_tptp_8_875, f_subcollectionofwithrelationfromtypefn(c_unitvectorinterval, c_directionoftranslation_throughout, c_movement_translationevent), c_tptpcol_16_31868)), ifeq3(isa(f_relationallexistsfn(c_tptpnsubcollectionofwithrelationfromtypefnunitvectorintervaldirectionoftranslation_throughoutmovement_translationevent_786, c_tptp_8_875, f_subcollectionofwithrelationfromtypefn(c_unitvectorinterval, c_directionoftranslation_throughout, c_movement_translationevent), c_tptpcol_16_31868), c_tptpcol_16_31868), true, tptpcol_16_31868(f_relationallexistsfn(c_tptpnsubcollectionofwithrelationfromtypefnunitvectorintervaldirectionoftranslation_throughoutmovement_translationevent_786, c_tptp_8_875, f_subcollectionofwithrelationfromtypefn(c_unitvectorinterval, c_directionoftranslation_throughout, c_movement_translationevent), c_tptpcol_16_31868)), true)), tuple2(true, true), a, b)
% 1.36/0.54  = { by axiom 3 (ifeq_axiom) R->L }
% 1.36/0.54    ifeq2(tuple2(tptp_8_875(c_tptpnsubcollectionofwithrelationfromtypefnunitvectorintervaldirectionoftranslation_throughoutmovement_translationevent_786, f_relationallexistsfn(c_tptpnsubcollectionofwithrelationfromtypefnunitvectorintervaldirectionoftranslation_throughoutmovement_translationevent_786, c_tptp_8_875, f_subcollectionofwithrelationfromtypefn(c_unitvectorinterval, c_directionoftranslation_throughout, c_movement_translationevent), c_tptpcol_16_31868)), ifeq3(ifeq3(true, true, isa(f_relationallexistsfn(c_tptpnsubcollectionofwithrelationfromtypefnunitvectorintervaldirectionoftranslation_throughoutmovement_translationevent_786, c_tptp_8_875, f_subcollectionofwithrelationfromtypefn(c_unitvectorinterval, c_directionoftranslation_throughout, c_movement_translationevent), c_tptpcol_16_31868), c_tptpcol_16_31868), true), true, tptpcol_16_31868(f_relationallexistsfn(c_tptpnsubcollectionofwithrelationfromtypefnunitvectorintervaldirectionoftranslation_throughoutmovement_translationevent_786, c_tptp_8_875, f_subcollectionofwithrelationfromtypefn(c_unitvectorinterval, c_directionoftranslation_throughout, c_movement_translationevent), c_tptpcol_16_31868)), true)), tuple2(true, true), a, b)
% 1.36/0.54  = { by axiom 7 (just13) R->L }
% 1.36/0.54    ifeq2(tuple2(tptp_8_875(c_tptpnsubcollectionofwithrelationfromtypefnunitvectorintervaldirectionoftranslation_throughoutmovement_translationevent_786, f_relationallexistsfn(c_tptpnsubcollectionofwithrelationfromtypefnunitvectorintervaldirectionoftranslation_throughoutmovement_translationevent_786, c_tptp_8_875, f_subcollectionofwithrelationfromtypefn(c_unitvectorinterval, c_directionoftranslation_throughout, c_movement_translationevent), c_tptpcol_16_31868)), ifeq3(ifeq3(ifeq3(mtvisible(c_tptp_member2610_mt), true, relationallexists(c_tptp_8_875, f_subcollectionofwithrelationfromtypefn(c_unitvectorinterval, c_directionoftranslation_throughout, c_movement_translationevent), c_tptpcol_16_31868), true), true, isa(f_relationallexistsfn(c_tptpnsubcollectionofwithrelationfromtypefnunitvectorintervaldirectionoftranslation_throughoutmovement_translationevent_786, c_tptp_8_875, f_subcollectionofwithrelationfromtypefn(c_unitvectorinterval, c_directionoftranslation_throughout, c_movement_translationevent), c_tptpcol_16_31868), c_tptpcol_16_31868), true), true, tptpcol_16_31868(f_relationallexistsfn(c_tptpnsubcollectionofwithrelationfromtypefnunitvectorintervaldirectionoftranslation_throughoutmovement_translationevent_786, c_tptp_8_875, f_subcollectionofwithrelationfromtypefn(c_unitvectorinterval, c_directionoftranslation_throughout, c_movement_translationevent), c_tptpcol_16_31868)), true)), tuple2(true, true), a, b)
% 1.36/0.54  = { by lemma 12 }
% 1.36/0.54    ifeq2(tuple2(tptp_8_875(c_tptpnsubcollectionofwithrelationfromtypefnunitvectorintervaldirectionoftranslation_throughoutmovement_translationevent_786, f_relationallexistsfn(c_tptpnsubcollectionofwithrelationfromtypefnunitvectorintervaldirectionoftranslation_throughoutmovement_translationevent_786, c_tptp_8_875, f_subcollectionofwithrelationfromtypefn(c_unitvectorinterval, c_directionoftranslation_throughout, c_movement_translationevent), c_tptpcol_16_31868)), ifeq3(ifeq3(ifeq3(true, true, relationallexists(c_tptp_8_875, f_subcollectionofwithrelationfromtypefn(c_unitvectorinterval, c_directionoftranslation_throughout, c_movement_translationevent), c_tptpcol_16_31868), true), true, isa(f_relationallexistsfn(c_tptpnsubcollectionofwithrelationfromtypefnunitvectorintervaldirectionoftranslation_throughoutmovement_translationevent_786, c_tptp_8_875, f_subcollectionofwithrelationfromtypefn(c_unitvectorinterval, c_directionoftranslation_throughout, c_movement_translationevent), c_tptpcol_16_31868), c_tptpcol_16_31868), true), true, tptpcol_16_31868(f_relationallexistsfn(c_tptpnsubcollectionofwithrelationfromtypefnunitvectorintervaldirectionoftranslation_throughoutmovement_translationevent_786, c_tptp_8_875, f_subcollectionofwithrelationfromtypefn(c_unitvectorinterval, c_directionoftranslation_throughout, c_movement_translationevent), c_tptpcol_16_31868)), true)), tuple2(true, true), a, b)
% 1.36/0.54  = { by axiom 3 (ifeq_axiom) }
% 1.36/0.54    ifeq2(tuple2(tptp_8_875(c_tptpnsubcollectionofwithrelationfromtypefnunitvectorintervaldirectionoftranslation_throughoutmovement_translationevent_786, f_relationallexistsfn(c_tptpnsubcollectionofwithrelationfromtypefnunitvectorintervaldirectionoftranslation_throughoutmovement_translationevent_786, c_tptp_8_875, f_subcollectionofwithrelationfromtypefn(c_unitvectorinterval, c_directionoftranslation_throughout, c_movement_translationevent), c_tptpcol_16_31868)), ifeq3(ifeq3(relationallexists(c_tptp_8_875, f_subcollectionofwithrelationfromtypefn(c_unitvectorinterval, c_directionoftranslation_throughout, c_movement_translationevent), c_tptpcol_16_31868), true, isa(f_relationallexistsfn(c_tptpnsubcollectionofwithrelationfromtypefnunitvectorintervaldirectionoftranslation_throughoutmovement_translationevent_786, c_tptp_8_875, f_subcollectionofwithrelationfromtypefn(c_unitvectorinterval, c_directionoftranslation_throughout, c_movement_translationevent), c_tptpcol_16_31868), c_tptpcol_16_31868), true), true, tptpcol_16_31868(f_relationallexistsfn(c_tptpnsubcollectionofwithrelationfromtypefnunitvectorintervaldirectionoftranslation_throughoutmovement_translationevent_786, c_tptp_8_875, f_subcollectionofwithrelationfromtypefn(c_unitvectorinterval, c_directionoftranslation_throughout, c_movement_translationevent), c_tptpcol_16_31868)), true)), tuple2(true, true), a, b)
% 1.36/0.54  = { by axiom 3 (ifeq_axiom) R->L }
% 1.36/0.54    ifeq2(tuple2(tptp_8_875(c_tptpnsubcollectionofwithrelationfromtypefnunitvectorintervaldirectionoftranslation_throughoutmovement_translationevent_786, f_relationallexistsfn(c_tptpnsubcollectionofwithrelationfromtypefnunitvectorintervaldirectionoftranslation_throughoutmovement_translationevent_786, c_tptp_8_875, f_subcollectionofwithrelationfromtypefn(c_unitvectorinterval, c_directionoftranslation_throughout, c_movement_translationevent), c_tptpcol_16_31868)), ifeq3(ifeq3(relationallexists(c_tptp_8_875, f_subcollectionofwithrelationfromtypefn(c_unitvectorinterval, c_directionoftranslation_throughout, c_movement_translationevent), c_tptpcol_16_31868), true, ifeq3(true, true, isa(f_relationallexistsfn(c_tptpnsubcollectionofwithrelationfromtypefnunitvectorintervaldirectionoftranslation_throughoutmovement_translationevent_786, c_tptp_8_875, f_subcollectionofwithrelationfromtypefn(c_unitvectorinterval, c_directionoftranslation_throughout, c_movement_translationevent), c_tptpcol_16_31868), c_tptpcol_16_31868), true), true), true, tptpcol_16_31868(f_relationallexistsfn(c_tptpnsubcollectionofwithrelationfromtypefnunitvectorintervaldirectionoftranslation_throughoutmovement_translationevent_786, c_tptp_8_875, f_subcollectionofwithrelationfromtypefn(c_unitvectorinterval, c_directionoftranslation_throughout, c_movement_translationevent), c_tptpcol_16_31868)), true)), tuple2(true, true), a, b)
% 1.36/0.54  = { by axiom 5 (just14) R->L }
% 1.36/0.54    ifeq2(tuple2(tptp_8_875(c_tptpnsubcollectionofwithrelationfromtypefnunitvectorintervaldirectionoftranslation_throughoutmovement_translationevent_786, f_relationallexistsfn(c_tptpnsubcollectionofwithrelationfromtypefnunitvectorintervaldirectionoftranslation_throughoutmovement_translationevent_786, c_tptp_8_875, f_subcollectionofwithrelationfromtypefn(c_unitvectorinterval, c_directionoftranslation_throughout, c_movement_translationevent), c_tptpcol_16_31868)), ifeq3(ifeq3(relationallexists(c_tptp_8_875, f_subcollectionofwithrelationfromtypefn(c_unitvectorinterval, c_directionoftranslation_throughout, c_movement_translationevent), c_tptpcol_16_31868), true, ifeq3(isa(c_tptpnsubcollectionofwithrelationfromtypefnunitvectorintervaldirectionoftranslation_throughoutmovement_translationevent_786, f_subcollectionofwithrelationfromtypefn(c_unitvectorinterval, c_directionoftranslation_throughout, c_movement_translationevent)), true, isa(f_relationallexistsfn(c_tptpnsubcollectionofwithrelationfromtypefnunitvectorintervaldirectionoftranslation_throughoutmovement_translationevent_786, c_tptp_8_875, f_subcollectionofwithrelationfromtypefn(c_unitvectorinterval, c_directionoftranslation_throughout, c_movement_translationevent), c_tptpcol_16_31868), c_tptpcol_16_31868), true), true), true, tptpcol_16_31868(f_relationallexistsfn(c_tptpnsubcollectionofwithrelationfromtypefnunitvectorintervaldirectionoftranslation_throughoutmovement_translationevent_786, c_tptp_8_875, f_subcollectionofwithrelationfromtypefn(c_unitvectorinterval, c_directionoftranslation_throughout, c_movement_translationevent), c_tptpcol_16_31868)), true)), tuple2(true, true), a, b)
% 1.36/0.54  = { by axiom 10 (just1) }
% 1.36/0.54    ifeq2(tuple2(tptp_8_875(c_tptpnsubcollectionofwithrelationfromtypefnunitvectorintervaldirectionoftranslation_throughoutmovement_translationevent_786, f_relationallexistsfn(c_tptpnsubcollectionofwithrelationfromtypefnunitvectorintervaldirectionoftranslation_throughoutmovement_translationevent_786, c_tptp_8_875, f_subcollectionofwithrelationfromtypefn(c_unitvectorinterval, c_directionoftranslation_throughout, c_movement_translationevent), c_tptpcol_16_31868)), ifeq3(true, true, tptpcol_16_31868(f_relationallexistsfn(c_tptpnsubcollectionofwithrelationfromtypefnunitvectorintervaldirectionoftranslation_throughoutmovement_translationevent_786, c_tptp_8_875, f_subcollectionofwithrelationfromtypefn(c_unitvectorinterval, c_directionoftranslation_throughout, c_movement_translationevent), c_tptpcol_16_31868)), true)), tuple2(true, true), a, b)
% 1.36/0.54  = { by axiom 3 (ifeq_axiom) }
% 1.36/0.54    ifeq2(tuple2(tptp_8_875(c_tptpnsubcollectionofwithrelationfromtypefnunitvectorintervaldirectionoftranslation_throughoutmovement_translationevent_786, f_relationallexistsfn(c_tptpnsubcollectionofwithrelationfromtypefnunitvectorintervaldirectionoftranslation_throughoutmovement_translationevent_786, c_tptp_8_875, f_subcollectionofwithrelationfromtypefn(c_unitvectorinterval, c_directionoftranslation_throughout, c_movement_translationevent), c_tptpcol_16_31868)), tptpcol_16_31868(f_relationallexistsfn(c_tptpnsubcollectionofwithrelationfromtypefnunitvectorintervaldirectionoftranslation_throughoutmovement_translationevent_786, c_tptp_8_875, f_subcollectionofwithrelationfromtypefn(c_unitvectorinterval, c_directionoftranslation_throughout, c_movement_translationevent), c_tptpcol_16_31868))), tuple2(true, true), a, b)
% 1.36/0.54  = { by axiom 8 (query27_1) }
% 1.36/0.54    b
% 1.36/0.54  % SZS output end Proof
% 1.36/0.54  
% 1.36/0.54  RESULT: Unsatisfiable (the axioms are contradictory).
%------------------------------------------------------------------------------