TSTP Solution File: LAT009-1 by Prover9---1109a

View Problem - Process Solution

%------------------------------------------------------------------------------
% File     : Prover9---1109a
% Problem  : LAT009-1 : TPTP v8.1.0. Released v2.2.0.
% Transfm  : none
% Format   : tptp:raw
% Command  : tptp2X_and_run_prover9 %d %s

% Computer : n011.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  : 600s
% DateTime : Sun Jul 17 06:25:05 EDT 2022

% Result   : Unsatisfiable 0.80s 1.12s
% Output   : Refutation 0.80s
% Verified : 
% SZS Type : -

% Comments : 
%------------------------------------------------------------------------------
%----WARNING: Could not form TPTP format derivation
%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.03/0.12  % Problem  : LAT009-1 : TPTP v8.1.0. Released v2.2.0.
% 0.03/0.12  % Command  : tptp2X_and_run_prover9 %d %s
% 0.12/0.33  % Computer : n011.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  : 600
% 0.12/0.33  % DateTime : Wed Jun 29 22:16:47 EDT 2022
% 0.12/0.33  % CPUTime  : 
% 0.80/1.12  ============================== Prover9 ===============================
% 0.80/1.12  Prover9 (32) version 2009-11A, November 2009.
% 0.80/1.12  Process 15249 was started by sandbox2 on n011.cluster.edu,
% 0.80/1.12  Wed Jun 29 22:16:48 2022
% 0.80/1.12  The command was "/export/starexec/sandbox2/solver/bin/prover9 -t 300 -f /tmp/Prover9_15096_n011.cluster.edu".
% 0.80/1.12  ============================== end of head ===========================
% 0.80/1.12  
% 0.80/1.12  ============================== INPUT =================================
% 0.80/1.12  
% 0.80/1.12  % Reading from file /tmp/Prover9_15096_n011.cluster.edu
% 0.80/1.12  
% 0.80/1.12  set(prolog_style_variables).
% 0.80/1.12  set(auto2).
% 0.80/1.12      % set(auto2) -> set(auto).
% 0.80/1.12      % set(auto) -> set(auto_inference).
% 0.80/1.12      % set(auto) -> set(auto_setup).
% 0.80/1.12      % set(auto_setup) -> set(predicate_elim).
% 0.80/1.12      % set(auto_setup) -> assign(eq_defs, unfold).
% 0.80/1.12      % set(auto) -> set(auto_limits).
% 0.80/1.12      % set(auto_limits) -> assign(max_weight, "100.000").
% 0.80/1.12      % set(auto_limits) -> assign(sos_limit, 20000).
% 0.80/1.12      % set(auto) -> set(auto_denials).
% 0.80/1.12      % set(auto) -> set(auto_process).
% 0.80/1.12      % set(auto2) -> assign(new_constants, 1).
% 0.80/1.12      % set(auto2) -> assign(fold_denial_max, 3).
% 0.80/1.12      % set(auto2) -> assign(max_weight, "200.000").
% 0.80/1.12      % set(auto2) -> assign(max_hours, 1).
% 0.80/1.12      % assign(max_hours, 1) -> assign(max_seconds, 3600).
% 0.80/1.12      % set(auto2) -> assign(max_seconds, 0).
% 0.80/1.12      % set(auto2) -> assign(max_minutes, 5).
% 0.80/1.12      % assign(max_minutes, 5) -> assign(max_seconds, 300).
% 0.80/1.12      % set(auto2) -> set(sort_initial_sos).
% 0.80/1.12      % set(auto2) -> assign(sos_limit, -1).
% 0.80/1.12      % set(auto2) -> assign(lrs_ticks, 3000).
% 0.80/1.12      % set(auto2) -> assign(max_megs, 400).
% 0.80/1.12      % set(auto2) -> assign(stats, some).
% 0.80/1.12      % set(auto2) -> clear(echo_input).
% 0.80/1.12      % set(auto2) -> set(quiet).
% 0.80/1.12      % set(auto2) -> clear(print_initial_clauses).
% 0.80/1.12      % set(auto2) -> clear(print_given).
% 0.80/1.12  assign(lrs_ticks,-1).
% 0.80/1.12  assign(sos_limit,10000).
% 0.80/1.12  assign(order,kbo).
% 0.80/1.12  set(lex_order_vars).
% 0.80/1.12  clear(print_given).
% 0.80/1.12  
% 0.80/1.12  % formulas(sos).  % not echoed (10 formulas)
% 0.80/1.12  
% 0.80/1.12  ============================== end of input ==========================
% 0.80/1.12  
% 0.80/1.12  % From the command line: assign(max_seconds, 300).
% 0.80/1.12  
% 0.80/1.12  ============================== PROCESS NON-CLAUSAL FORMULAS ==========
% 0.80/1.12  
% 0.80/1.12  % Formulas that are not ordinary clauses:
% 0.80/1.12  
% 0.80/1.12  ============================== end of process non-clausal formulas ===
% 0.80/1.12  
% 0.80/1.12  ============================== PROCESS INITIAL CLAUSES ===============
% 0.80/1.12  
% 0.80/1.12  ============================== PREDICATE ELIMINATION =================
% 0.80/1.12  
% 0.80/1.12  ============================== end predicate elimination =============
% 0.80/1.12  
% 0.80/1.12  Auto_denials:
% 0.80/1.12    % copying label prove_distributivity to answer in negative clause
% 0.80/1.12  
% 0.80/1.12  Term ordering decisions:
% 0.80/1.12  Function symbol KB weights:  a=1. b=1. c=1. join=1. meet=1.
% 0.80/1.12  
% 0.80/1.12  ============================== end of process initial clauses ========
% 0.80/1.12  
% 0.80/1.12  ============================== CLAUSES FOR SEARCH ====================
% 0.80/1.12  
% 0.80/1.12  ============================== end of clauses for search =============
% 0.80/1.12  
% 0.80/1.12  ============================== SEARCH ================================
% 0.80/1.12  
% 0.80/1.12  % Starting search at 0.01 seconds.
% 0.80/1.12  
% 0.80/1.12  ============================== PROOF =================================
% 0.80/1.12  % SZS status Unsatisfiable
% 0.80/1.12  % SZS output start Refutation
% 0.80/1.12  
% 0.80/1.12  % Proof 1 at 0.24 (+ 0.01) seconds: prove_distributivity.
% 0.80/1.12  % Length of proof is 72.
% 0.80/1.12  % Level of proof is 22.
% 0.80/1.12  % Maximum clause weight is 51.000.
% 0.80/1.12  % Given clauses 49.
% 0.80/1.12  
% 0.80/1.12  1 meet(A,A) = A # label(idempotence_of_meet) # label(axiom).  [assumption].
% 0.80/1.12  2 join(A,A) = A # label(idempotence_of_join) # label(axiom).  [assumption].
% 0.80/1.12  3 meet(A,join(A,B)) = A # label(absorption1) # label(axiom).  [assumption].
% 0.80/1.12  4 join(A,meet(A,B)) = A # label(absorption2) # label(axiom).  [assumption].
% 0.80/1.12  5 meet(A,B) = meet(B,A) # label(commutativity_of_meet) # label(axiom).  [assumption].
% 0.80/1.12  6 join(A,B) = join(B,A) # label(commutativity_of_join) # label(axiom).  [assumption].
% 0.80/1.12  7 meet(meet(A,B),C) = meet(A,meet(B,C)) # label(associativity_of_meet) # label(axiom).  [assumption].
% 0.80/1.12  8 meet(A,meet(B,C)) = meet(C,meet(A,B)).  [copy(7),rewrite([5(2)]),flip(a)].
% 0.80/1.12  9 join(join(A,B),C) = join(A,join(B,C)) # label(associativity_of_join) # label(axiom).  [assumption].
% 0.80/1.12  10 join(A,join(B,C)) = join(C,join(A,B)).  [copy(9),rewrite([6(2)]),flip(a)].
% 0.80/1.12  11 join(meet(join(meet(A,B),C),B),meet(C,A)) = meet(join(meet(join(A,B),C),B),join(C,A)) # label(distributivity_dual) # label(axiom).  [assumption].
% 0.80/1.12  12 meet(join(A,B),join(C,meet(B,join(A,C)))) = join(meet(A,B),meet(C,join(B,meet(A,C)))).  [copy(11),rewrite([6(2),5(3),5(4),6(5),5(7),6(8),6(9),5(10)]),flip(a)].
% 0.80/1.12  13 join(a,meet(b,c)) != meet(join(a,b),join(a,c)) # label(prove_distributivity) # label(negated_conjecture) # answer(prove_distributivity).  [assumption].
% 0.80/1.12  14 meet(join(a,b),join(a,c)) != join(a,meet(b,c)) # answer(prove_distributivity).  [copy(13),flip(a)].
% 0.80/1.12  15 meet(A,meet(A,B)) = meet(A,B).  [para(8(a,1),1(a,1)),rewrite([5(1),5(2),8(2,R),1(1),5(3)])].
% 0.80/1.12  17 join(A,join(A,B)) = join(A,B).  [para(10(a,1),2(a,1)),rewrite([6(1),6(2),10(2,R),2(1),6(3)])].
% 0.80/1.12  18 join(A,join(B,meet(A,C))) = join(A,B).  [para(4(a,1),10(a,2,2)),rewrite([6(2),6(4)])].
% 0.80/1.12  21 join(join(A,B),meet(A,B)) = join(A,B).  [para(12(a,1),3(a,1)),rewrite([3(4),6(3),1(4),6(3)])].
% 0.80/1.12  22 meet(join(A,B),join(C,meet(join(A,B),join(A,C)))) = join(A,meet(C,join(join(A,B),meet(A,C)))).  [para(3(a,1),12(a,2,1)),rewrite([17(2)])].
% 0.80/1.12  23 meet(join(A,B),join(join(A,C),meet(B,join(A,C)))) = join(meet(A,B),meet(join(A,C),join(A,B))).  [para(3(a,1),12(a,2,2,2,2)),rewrite([17(4),6(9)])].
% 0.80/1.12  24 meet(A,join(B,A)) = join(A,meet(B,A)).  [para(3(a,1),12(a,2,2)),rewrite([4(4),5(2),6(4)])].
% 0.80/1.12  26 join(meet(A,B),meet(C,join(meet(A,B),meet(A,C)))) = meet(A,join(C,meet(meet(A,B),join(A,C)))).  [para(4(a,1),12(a,1,1)),rewrite([15(7)]),flip(a)].
% 0.80/1.12  29 meet(join(A,B),join(C,meet(A,join(B,C)))) = join(meet(A,B),meet(C,join(A,meet(B,C)))).  [para(6(a,1),12(a,1,1)),rewrite([5(6)])].
% 0.80/1.12  30 meet(join(A,join(B,C)),join(D,meet(join(A,C),join(B,D)))) = join(meet(B,join(A,C)),meet(D,join(join(A,C),meet(B,D)))).  [para(10(a,1),12(a,1,1)),rewrite([6(3),6(8),6(10)])].
% 0.80/1.12  39 join(A,join(B,join(C,meet(A,D)))) = join(A,join(B,C)).  [para(18(a,1),10(a,2,2)),rewrite([6(3),10(3,R),6(2),10(6),6(5),10(6,R),6(5)])].
% 0.80/1.12  54 join(join(A,B),meet(A,join(B,meet(A,C)))) = join(A,B).  [para(18(a,1),21(a,1,1)),rewrite([18(8)])].
% 0.80/1.12  55 meet(join(A,B),join(A,join(B,C))) = join(join(A,B),meet(C,join(A,B))).  [para(10(a,1),24(a,1,2)),rewrite([6(2),10(3,R),6(2)])].
% 0.80/1.12  56 meet(join(A,B),join(B,meet(A,B))) = join(B,meet(A,B)).  [para(24(a,1),12(a,1,2,2)),rewrite([17(4),3(8),6(6)])].
% 0.80/1.12  58 join(join(A,meet(B,C)),meet(B,join(A,meet(B,C)))) = meet(join(A,B),join(A,meet(B,C))).  [para(18(a,1),24(a,1,2)),rewrite([6(3),5(4)]),flip(a)].
% 0.80/1.12  81 join(A,meet(B,join(join(A,C),meet(A,B)))) = join(A,meet(B,join(A,C))).  [para(6(a,1),22(a,2,2,2)),rewrite([22(6),10(8),6(7),4(7),6(6)])].
% 0.80/1.12  88 meet(join(A,B),join(A,meet(C,join(A,B)))) = join(A,meet(C,join(A,B))).  [para(22(a,1),15(a,1,2)),rewrite([81(6),22(11),81(10)])].
% 0.80/1.12  92 meet(join(A,B),join(join(C,meet(A,D)),meet(join(A,B),join(A,C)))) = join(A,meet(join(C,meet(A,D)),join(A,B))).  [para(18(a,1),22(a,1,2,2,2)),rewrite([81(17)])].
% 0.80/1.12  102 meet(join(A,B),join(C,meet(join(A,B),join(A,C)))) = join(A,meet(C,join(A,B))).  [back_rewrite(22),rewrite([81(11)])].
% 0.80/1.12  114 join(join(A,B),meet(B,join(A,meet(B,C)))) = join(A,B).  [para(6(a,1),54(a,1,1)),rewrite([6(6)])].
% 0.80/1.12  121 join(join(A,B),meet(A,join(join(A,B),meet(A,C)))) = join(A,B).  [para(17(a,1),54(a,1,1)),rewrite([17(8)])].
% 0.80/1.12  131 meet(join(A,join(join(B,C),meet(C,join(B,A)))),join(meet(B,C),join(join(A,meet(C,join(B,A))),meet(A,join(C,meet(B,A)))))) = join(meet(B,C),join(join(A,meet(C,join(B,A))),meet(A,join(C,meet(B,A))))).  [para(12(a,1),56(a,1,2,2)),rewrite([10(5,R),6(4),10(14,R),6(13),12(23),10(24,R),6(23)])].
% 0.80/1.12  142 join(A,join(join(A,B),meet(C,join(A,B)))) = join(A,B).  [para(17(a,1),114(a,1,1)),rewrite([5(4),88(6),10(5,R),6(4),17(7)])].
% 0.80/1.12  159 meet(join(A,join(B,C)),join(meet(B,C),join(join(A,meet(C,join(A,B))),meet(A,join(C,meet(A,B)))))) = join(meet(A,join(B,C)),meet(join(A,join(B,C)),join(A,meet(C,join(A,B))))).  [para(12(a,1),23(a,1,2,2)),rewrite([6(3),5(7),10(11,R),6(10),6(15),5(20)])].
% 0.80/1.12  174 meet(join(join(A,B),join(join(A,C),meet(B,join(A,C)))),join(meet(A,B),join(join(A,C),meet(B,join(A,C))))) = join(meet(A,B),join(join(A,C),meet(B,join(A,C)))).  [para(23(a,1),56(a,1,2,2)),rewrite([10(16),6(15),10(16,R),6(15),10(15),6(14),4(14),6(11),23(23),10(23),6(22),10(23,R),6(22),10(22),6(21),4(21),6(18)])].
% 0.80/1.12  192 join(join(A,B),meet(C,join(A,B))) = join(A,B).  [para(142(a,1),10(a,1)),rewrite([17(5),6(5)]),flip(a)].
% 0.80/1.12  198 meet(join(A,B),join(A,join(C,B))) = join(A,B).  [back_rewrite(174),rewrite([192(5),10(3),6(2),17(2),10(2),6(1),10(2,R),6(1),192(7),10(5),6(4),4(4),6(3),5(4),192(9),10(7),6(6),4(6),6(5)])].
% 0.80/1.12  214 meet(join(A,B),join(A,meet(B,C))) = join(A,meet(B,C)).  [back_rewrite(58),rewrite([192(6)]),flip(a)].
% 0.80/1.12  215 meet(join(A,B),join(A,join(B,C))) = join(A,B).  [back_rewrite(55),rewrite([192(8)])].
% 0.80/1.12  236 join(A,meet(join(B,C),join(A,B))) = join(A,B).  [para(198(a,1),12(a,1,2,2)),rewrite([17(2),6(2),10(4),6(3),10(4,R),6(3),17(3),215(4),3(3),6(2),6(4),81(8)]),flip(a)].
% 0.80/1.12  266 join(A,meet(join(B,C),join(B,A))) = join(B,A).  [para(236(a,1),6(a,2)),rewrite([6(2),6(4),6(5)])].
% 0.80/1.12  267 join(A,meet(join(B,C),join(A,C))) = join(A,C).  [para(6(a,1),236(a,1,2,1))].
% 0.80/1.12  287 meet(join(A,B),join(A,C)) = join(A,meet(C,join(A,B))).  [back_rewrite(102),rewrite([266(5)])].
% 0.80/1.12  302 join(A,meet(meet(B,C),join(A,B))) = join(A,meet(B,C)).  [back_rewrite(214),rewrite([287(4)])].
% 0.80/1.12  307 meet(join(A,join(B,C)),join(meet(B,C),join(join(A,meet(C,join(A,B))),meet(A,join(C,meet(A,B)))))) = join(A,join(meet(A,join(B,C)),meet(C,join(A,B)))).  [back_rewrite(159),rewrite([287(20),5(19),8(19),5(18),8(19,R),5(18),287(18),236(18),10(18,R),6(17)])].
% 0.80/1.12  310 join(A,meet(join(B,meet(A,C)),join(A,D))) = join(A,meet(B,join(A,D))).  [back_rewrite(92),rewrite([287(6),10(7,R),10(6,R),18(6),18(4),287(3)]),flip(a)].
% 0.80/1.12  311 join(a,meet(c,join(a,b))) != join(a,meet(b,c)) # answer(prove_distributivity).  [back_rewrite(14),rewrite([287(7)])].
% 0.80/1.12  320 join(A,meet(B,join(A,meet(B,C)))) = join(A,meet(B,C)).  [para(4(a,1),267(a,1,2,1))].
% 0.80/1.12  336 join(A,meet(join(B,C),join(A,meet(D,join(B,C))))) = join(A,meet(D,join(B,C))).  [para(192(a,1),267(a,1,2,1))].
% 0.80/1.12  344 join(join(A,B),meet(A,C)) = join(A,B).  [back_rewrite(121),rewrite([320(6)])].
% 0.80/1.12  348 join(A,meet(join(A,join(B,C)),join(meet(B,C),meet(C,join(A,B))))) = join(A,join(meet(A,join(B,C)),meet(C,join(A,B)))).  [back_rewrite(307),rewrite([344(10),10(7,R),6(6),287(8),5(7)])].
% 0.80/1.12  351 join(A,meet(join(meet(B,C),meet(C,join(A,B))),join(A,join(join(B,C),meet(C,join(A,B)))))) = join(A,join(meet(B,C),meet(C,join(A,B)))).  [back_rewrite(131),rewrite([6(2),6(7),5(10),344(13),10(10,R),6(9),287(11),6(13),5(16),344(19),10(16,R),6(15)])].
% 0.80/1.12  357 meet(A,join(B,meet(A,C))) = join(meet(A,C),meet(B,A)).  [para(26(a,1),6(a,2)),rewrite([5(2),6(6),320(6),6(5),302(7)]),flip(a)].
% 0.80/1.12  429 join(join(A,B),meet(B,C)) = join(A,B).  [para(6(a,1),344(a,1,1)),rewrite([6(4)])].
% 0.80/1.12  432 join(meet(A,B),join(meet(C,join(A,D)),meet(A,meet(C,B)))) = meet(join(A,D),join(C,meet(meet(A,B),join(A,join(D,C))))).  [para(344(a,1),12(a,1,1)),rewrite([6(4),10(4),6(3),10(4,R),6(3),8(10),5(9),3(9),5(8),5(11),357(13),5(12),8(12,R),5(11)]),flip(a)].
% 0.80/1.12  437 meet(meet(A,B),join(A,C)) = meet(A,B).  [para(344(a,1),24(a,1,2)),rewrite([8(7),5(6),3(6),5(5),2(6)])].
% 0.80/1.12  439 join(A,meet(join(B,C),join(A,meet(B,D)))) = join(A,meet(B,D)).  [para(344(a,1),267(a,1,2,1))].
% 0.80/1.12  444 join(A,join(meet(A,join(B,C)),meet(C,join(A,B)))) = join(A,join(meet(B,C),meet(C,join(A,B)))).  [back_rewrite(351),rewrite([429(8),5(7),348(8)])].
% 0.80/1.12  450 join(meet(A,B),join(meet(C,join(A,D)),meet(A,meet(B,C)))) = meet(join(A,D),join(C,meet(A,B))).  [back_rewrite(432),rewrite([5(4),6(10),437(12)])].
% 0.80/1.12  477 meet(join(A,B),join(C,meet(A,D))) = join(meet(A,D),meet(C,join(A,B))).  [para(437(a,1),12(a,2,1)),rewrite([10(3),6(2),4(2),6(1),6(4),439(6),5(8),8(8),5(7),8(8,R),5(7),344(9)])].
% 0.80/1.12  478 meet(join(A,meet(B,C)),join(B,D)) = join(meet(B,C),meet(A,join(B,D))).  [para(437(a,1),12(a,2,2,2,2)),rewrite([6(2),10(6),6(5),4(5),6(4),192(6),5(6),8(6),5(5),8(6,R),5(5),477(10),10(11,R),450(11),477(8)])].
% 0.80/1.12  490 join(meet(A,join(B,C)),meet(C,join(A,B))) = join(meet(A,B),meet(C,join(A,meet(B,C)))).  [back_rewrite(29),rewrite([477(5)])].
% 0.80/1.12  494 join(A,join(meet(A,B),meet(C,join(A,D)))) = join(A,meet(C,join(A,D))).  [back_rewrite(310),rewrite([478(4)])].
% 0.80/1.12  499 join(A,join(meet(B,C),meet(C,join(A,B)))) = join(A,meet(C,join(A,meet(B,C)))).  [back_rewrite(444),rewrite([490(5),494(6)]),flip(a)].
% 0.80/1.12  536 join(A,meet(join(B,C),join(A,D))) = join(A,meet(D,join(B,C))).  [para(30(a,1),24(a,2,2)),rewrite([6(2),6(5),6(8),10(11,R),6(10),287(12),267(12),6(6),5(12),357(14),5(13),10(16,R),6(15),10(15),6(14),10(14,R),6(13),494(14),10(13,R),6(12),494(13),10(11,R),6(10),499(11),336(10)])].
% 0.80/1.12  585 join(A,join(B,meet(C,B))) = join(A,B).  [back_rewrite(267),rewrite([536(4),24(2)])].
% 0.80/1.12  691 join(A,meet(B,join(A,C))) = join(A,meet(B,C)).  [para(12(a,1),287(a,2,2)),rewrite([6(1),6(4),5(6),287(6),5(5),8(5),5(4),8(5,R),5(4),287(4),536(4),24(2),585(3),5(4),5(5),357(7),5(6),39(9),18(7)])].
% 0.80/1.12  732 $F # answer(prove_distributivity).  [back_rewrite(311),rewrite([691(7),5(4)]),xx(a)].
% 0.80/1.12  
% 0.80/1.12  % SZS output end Refutation
% 0.80/1.12  ============================== end of proof ==========================
% 0.80/1.12  
% 0.80/1.12  ============================== STATISTICS ============================
% 0.80/1.12  
% 0.80/1.12  Given=49. Generated=3630. Kept=727. proofs=1.
% 0.80/1.12  Usable=30. Sos=213. Demods=279. Limbo=41, Disabled=453. Hints=0.
% 0.80/1.12  Megabytes=0.94.
% 0.80/1.12  User_CPU=0.24, System_CPU=0.01, Wall_clock=0.
% 0.80/1.12  
% 0.80/1.12  ============================== end of statistics =====================
% 0.80/1.12  
% 0.80/1.12  ============================== end of search =========================
% 0.80/1.12  
% 0.80/1.12  THEOREM PROVED
% 0.80/1.12  % SZS status Unsatisfiable
% 0.80/1.12  
% 0.80/1.12  Exiting with 1 proof.
% 0.80/1.12  
% 0.80/1.12  Process 15249 exit (max_proofs) Wed Jun 29 22:16:48 2022
% 0.80/1.12  Prover9 interrupted
%------------------------------------------------------------------------------