TSTP Solution File: NUN062+1 by Otter---3.3

View Problem - Process Solution

%------------------------------------------------------------------------------
% File     : Otter---3.3
% Problem  : NUN062+1 : TPTP v8.1.0. Bugfixed v7.4.0.
% Transfm  : none
% Format   : tptp:raw
% Command  : otter-tptp-script %s

% Computer : n027.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 Jul 27 13:10:27 EDT 2022

% Result   : Theorem 6.22s 6.48s
% Output   : Refutation 6.22s
% Verified : 
% SZS Type : Refutation
%            Derivation depth      :    4
%            Number of leaves      :   15
% Syntax   : Number of clauses     :   24 (  14 unt;   2 nHn;  12 RR)
%            Number of literals    :   40 (   0 equ;  15 neg)
%            Maximal clause size   :    4 (   1 avg)
%            Maximal term depth    :    3 (   1 avg)
%            Number of predicates  :    5 (   4 usr;   1 prp; 0-3 aty)
%            Number of functors    :   11 (  11 usr;   2 con; 0-2 aty)
%            Number of variables   :   36 (   4 sgn)

% Comments : 
%------------------------------------------------------------------------------
cnf(2,axiom,
    ( r1(A)
    | ~ id(A,dollar_c1) ),
    file('NUN062+1.p',unknown),
    [] ).

cnf(3,axiom,
    ( id(A,dollar_f1(B))
    | ~ r2(B,A) ),
    file('NUN062+1.p',unknown),
    [] ).

cnf(4,axiom,
    ( r2(A,B)
    | ~ id(B,dollar_f1(A)) ),
    file('NUN062+1.p',unknown),
    [] ).

cnf(12,axiom,
    ( ~ id(A,B)
    | ~ r1(B)
    | r1(A) ),
    file('NUN062+1.p',unknown),
    [] ).

cnf(13,axiom,
    ( ~ id(A,B)
    | ~ id(C,D)
    | ~ r2(A,C)
    | r2(B,D) ),
    file('NUN062+1.p',unknown),
    [] ).

cnf(20,axiom,
    ( ~ id(A,B)
    | ~ r1(A)
    | ~ r2(C,B) ),
    file('NUN062+1.p',unknown),
    [] ).

cnf(21,axiom,
    ( id(A,dollar_f20(B,A))
    | ~ id(C,B)
    | ~ r3(dollar_c2,A,C) ),
    file('NUN062+1.p',unknown),
    [] ).

cnf(22,axiom,
    ( r1(dollar_f20(A,B))
    | ~ id(C,A)
    | ~ r3(dollar_c2,B,C) ),
    file('NUN062+1.p',unknown),
    [] ).

cnf(42,axiom,
    id(A,A),
    file('NUN062+1.p',unknown),
    [] ).

cnf(43,axiom,
    id(dollar_f5(A,B),dollar_f7(A,B)),
    file('NUN062+1.p',unknown),
    [] ).

cnf(44,axiom,
    r2(A,dollar_f4(B,A)),
    file('NUN062+1.p',unknown),
    [] ).

cnf(45,axiom,
    r3(A,dollar_f4(A,B),dollar_f5(A,B)),
    file('NUN062+1.p',unknown),
    [] ).

cnf(53,axiom,
    id(dollar_f13(A),A),
    file('NUN062+1.p',unknown),
    [] ).

cnf(60,axiom,
    ( id(A,dollar_f17(A))
    | id(A,dollar_f18(A)) ),
    file('NUN062+1.p',unknown),
    [] ).

cnf(61,axiom,
    ( id(A,dollar_f17(A))
    | r2(dollar_f19(A),dollar_f18(A)) ),
    file('NUN062+1.p',unknown),
    [] ).

cnf(67,plain,
    r1(dollar_c1),
    inference(hyper,[status(thm)],[42,2]),
    [iquote('hyper,42,2')] ).

cnf(81,plain,
    r2(A,dollar_f13(dollar_f1(A))),
    inference(hyper,[status(thm)],[53,4]),
    [iquote('hyper,53,4')] ).

cnf(104,plain,
    id(dollar_f4(A,B),dollar_f1(B)),
    inference(hyper,[status(thm)],[44,3]),
    [iquote('hyper,44,3')] ).

cnf(123,plain,
    r1(dollar_f20(dollar_f7(dollar_c2,A),dollar_f4(dollar_c2,A))),
    inference(hyper,[status(thm)],[45,22,43]),
    [iquote('hyper,45,22,43')] ).

cnf(125,plain,
    id(dollar_f4(dollar_c2,A),dollar_f20(dollar_f7(dollar_c2,A),dollar_f4(dollar_c2,A))),
    inference(hyper,[status(thm)],[45,21,43]),
    [iquote('hyper,45,21,43')] ).

cnf(4413,plain,
    id(dollar_c1,dollar_f17(dollar_c1)),
    inference(factor_simp,[status(thm)],[inference(hyper,[status(thm)],[61,20,60,67])]),
    [iquote('hyper,61,20,60,67,factor_simp')] ).

cnf(4502,plain,
    r2(dollar_f17(dollar_c1),dollar_f1(dollar_c1)),
    inference(hyper,[status(thm)],[4413,13,53,81]),
    [iquote('hyper,4413,13,53,81')] ).

cnf(4758,plain,
    r1(dollar_f4(dollar_c2,A)),
    inference(hyper,[status(thm)],[125,12,123]),
    [iquote('hyper,125,12,123')] ).

cnf(4759,plain,
    $false,
    inference(hyper,[status(thm)],[4758,20,104,4502]),
    [iquote('hyper,4758,20,104,4502')] ).

%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.10/0.11  % Problem  : NUN062+1 : TPTP v8.1.0. Bugfixed v7.4.0.
% 0.10/0.12  % Command  : otter-tptp-script %s
% 0.12/0.33  % Computer : n027.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 Jul 27 02:52:21 EDT 2022
% 0.12/0.33  % CPUTime  : 
% 1.73/1.95  ----- Otter 3.3f, August 2004 -----
% 1.73/1.95  The process was started by sandbox on n027.cluster.edu,
% 1.73/1.95  Wed Jul 27 02:52:21 2022
% 1.73/1.95  The command was "./otter".  The process ID is 29140.
% 1.73/1.95  
% 1.73/1.95  set(prolog_style_variables).
% 1.73/1.95  set(auto).
% 1.73/1.95     dependent: set(auto1).
% 1.73/1.95     dependent: set(process_input).
% 1.73/1.95     dependent: clear(print_kept).
% 1.73/1.95     dependent: clear(print_new_demod).
% 1.73/1.95     dependent: clear(print_back_demod).
% 1.73/1.95     dependent: clear(print_back_sub).
% 1.73/1.95     dependent: set(control_memory).
% 1.73/1.95     dependent: assign(max_mem, 12000).
% 1.73/1.95     dependent: assign(pick_given_ratio, 4).
% 1.73/1.95     dependent: assign(stats_level, 1).
% 1.73/1.95     dependent: assign(max_seconds, 10800).
% 1.73/1.95  clear(print_given).
% 1.73/1.95  
% 1.73/1.95  formula_list(usable).
% 1.73/1.95  exists Y24 all X19 (id(X19,Y24)&r1(X19)| -r1(X19)& -id(X19,Y24)).
% 1.73/1.95  all X11 exists Y21 all X12 (id(X12,Y21)&r2(X11,X12)| -r2(X11,X12)& -id(X12,Y21)).
% 1.73/1.95  all X13 X14 exists Y22 all X15 (id(X15,Y22)&r3(X13,X14,X15)| -r3(X13,X14,X15)& -id(X15,Y22)).
% 1.73/1.95  all X16 X17 exists Y23 all X18 (id(X18,Y23)&r4(X16,X17,X18)| -r4(X16,X17,X18)& -id(X18,Y23)).
% 1.73/1.95  all X20 id(X20,X20).
% 1.73/1.95  all X21 X22 (-id(X21,X22)|id(X22,X21)).
% 1.73/1.95  all X23 X24 X25 (-id(X23,X24)|id(X23,X25)| -id(X24,X25)).
% 1.73/1.95  all X26 X27 (-id(X26,X27)| -r1(X26)& -r1(X27)|r1(X26)&r1(X27)).
% 1.73/1.95  all X28 X29 X30 X31 (-id(X28,X30)| -id(X29,X31)| -r2(X28,X29)& -r2(X30,X31)|r2(X28,X29)&r2(X30,X31)).
% 1.73/1.95  all X32 X33 X34 X35 X36 X37 (-id(X32,X35)| -id(X33,X36)| -id(X34,X37)| -r3(X32,X33,X34)& -r3(X35,X36,X37)|r3(X32,X33,X34)&r3(X35,X36,X37)).
% 1.73/1.95  all X38 X39 X40 X41 X42 X43 (-id(X38,X41)| -id(X39,X42)| -id(X40,X43)| -r4(X38,X39,X40)& -r4(X41,X42,X43)|r4(X38,X39,X40)&r4(X41,X42,X43)).
% 1.73/1.95  all X1 X8 exists Y4 ((exists Y5 (id(Y5,Y4)& (exists Y15 (r2(X8,Y15)&r3(X1,Y15,Y5)))))& (exists Y7 (r2(Y7,Y4)&r3(X1,X8,Y7)))).
% 1.73/1.95  all X2 X9 exists Y2 ((exists Y3 (id(Y3,Y2)& (exists Y14 (r2(X9,Y14)&r4(X2,Y14,Y3)))))& (exists Y6 (r3(Y6,X2,Y2)&r4(X2,X9,Y6)))).
% 1.73/1.95  all X3 X10 ((all Y12 ((all Y13 (-id(Y13,Y12)| -r2(X3,Y13)))| -r2(X10,Y12)))|id(X3,X10)).
% 1.73/1.95  all X4 exists Y9 (id(Y9,X4)& (exists Y16 (r1(Y16)&r3(X4,Y16,Y9)))).
% 1.73/1.95  all X5 exists Y8 ((exists Y17 (r1(Y17)&r4(X5,Y17,Y8)))& (exists Y18 (id(Y8,Y18)&r1(Y18)))).
% 1.73/1.95  all X6 ((exists Y19 (id(X6,Y19)&r1(Y19)))| (exists Y1 Y11 (id(X6,Y11)&r2(Y1,Y11)))).
% 1.73/1.95  all X7 Y10 ((all Y20 (-id(Y20,Y10)| -r1(Y20)))| -r2(X7,Y10)).
% 1.73/1.95  -(all X1 exists Y2 Y1 ((all Y4 (-id(Y1,Y4)| -r1(Y4)))& (exists Y3 (id(Y3,Y2)&r3(X1,Y1,Y3))))).
% 1.73/1.95  end_of_list.
% 1.73/1.95  
% 1.73/1.95  -------> usable clausifies to:
% 1.73/1.95  
% 1.73/1.95  list(usable).
% 1.73/1.95  0 [] id(X19,$c1)| -r1(X19).
% 1.73/1.95  0 [] r1(X19)| -id(X19,$c1).
% 1.73/1.95  0 [] id(X12,$f1(X11))| -r2(X11,X12).
% 1.73/1.95  0 [] r2(X11,X12)| -id(X12,$f1(X11)).
% 1.73/1.95  0 [] id(X15,$f2(X13,X14))| -r3(X13,X14,X15).
% 1.73/1.95  0 [] r3(X13,X14,X15)| -id(X15,$f2(X13,X14)).
% 1.73/1.95  0 [] id(X18,$f3(X16,X17))| -r4(X16,X17,X18).
% 1.73/1.95  0 [] r4(X16,X17,X18)| -id(X18,$f3(X16,X17)).
% 1.73/1.95  0 [] id(X20,X20).
% 1.73/1.95  0 [] -id(X21,X22)|id(X22,X21).
% 1.73/1.95  0 [] -id(X23,X24)|id(X23,X25)| -id(X24,X25).
% 1.73/1.95  0 [] -id(X26,X27)| -r1(X26)|r1(X27).
% 1.73/1.95  0 [] -id(X26,X27)| -r1(X27)|r1(X26).
% 1.73/1.95  0 [] -id(X28,X30)| -id(X29,X31)| -r2(X28,X29)|r2(X30,X31).
% 1.73/1.95  0 [] -id(X28,X30)| -id(X29,X31)| -r2(X30,X31)|r2(X28,X29).
% 1.73/1.95  0 [] -id(X32,X35)| -id(X33,X36)| -id(X34,X37)| -r3(X32,X33,X34)|r3(X35,X36,X37).
% 1.73/1.95  0 [] -id(X32,X35)| -id(X33,X36)| -id(X34,X37)| -r3(X35,X36,X37)|r3(X32,X33,X34).
% 1.73/1.95  0 [] -id(X38,X41)| -id(X39,X42)| -id(X40,X43)| -r4(X38,X39,X40)|r4(X41,X42,X43).
% 1.73/1.95  0 [] -id(X38,X41)| -id(X39,X42)| -id(X40,X43)| -r4(X41,X42,X43)|r4(X38,X39,X40).
% 1.73/1.95  0 [] id($f5(X1,X8),$f7(X1,X8)).
% 1.73/1.95  0 [] r2(X8,$f4(X1,X8)).
% 1.73/1.95  0 [] r3(X1,$f4(X1,X8),$f5(X1,X8)).
% 1.73/1.95  0 [] r2($f6(X1,X8),$f7(X1,X8)).
% 1.73/1.95  0 [] r3(X1,X8,$f6(X1,X8)).
% 1.73/1.95  0 [] id($f9(X2,X9),$f11(X2,X9)).
% 1.73/1.95  0 [] r2(X9,$f8(X2,X9)).
% 1.73/1.95  0 [] r4(X2,$f8(X2,X9),$f9(X2,X9)).
% 1.73/1.95  0 [] r3($f10(X2,X9),X2,$f11(X2,X9)).
% 1.73/1.95  0 [] r4(X2,X9,$f10(X2,X9)).
% 1.73/1.95  0 [] -id(Y13,Y12)| -r2(X3,Y13)| -r2(X10,Y12)|id(X3,X10).
% 1.73/1.95  0 [] id($f13(X4),X4).
% 1.73/1.95  0 [] r1($f12(X4)).
% 1.73/1.95  0 [] r3(X4,$f12(X4),$f13(X4)).
% 1.73/1.95  0 [] r1($f14(X5)).
% 1.73/1.95  0 [] r4(X5,$f14(X5),$f16(X5)).
% 1.73/1.95  0 [] id($f16(X5),$f15(X5)).
% 1.73/1.95  0 [] r1($f15(X5)).
% 1.73/1.95  0 [] id(X6,$f17(X6))|id(X6,$f18(X6)).
% 1.73/1.95  0 [] id(X6,$f17(X6))|r2($f19(X6),$f18(X6)).
% 1.73/1.95  0 [] r1($f17(X6))|id(X6,$f18(X6)).
% 1.73/1.95  0 [] r1($f17(X6))|r2($f19(X6),$f18(X6)).
% 1.73/1.95  0 [] -id(Y20,Y10)| -r1(Y20)| -r2(X7,Y10).
% 1.73/1.95  0 [] id(Y1,$f20(Y2,Y1))| -id(Y3,Y2)| -r3($c2,Y1,Y3).
% 1.73/1.95  0 [] r1($f20(Y2,Y1))| -id(Y3,Y2)| -r3($c2,Y1,Y3).
% 6.22/6.48  end_of_list.
% 6.22/6.48  
% 6.22/6.48  SCAN INPUT: prop=0, horn=0, equality=0, symmetry=0, max_lits=5.
% 6.22/6.48  
% 6.22/6.48  This is a non-Horn set without equality.  The strategy will
% 6.22/6.48  be ordered hyper_res, unit deletion, and factoring, with
% 6.22/6.48  satellites in sos and with nuclei in usable.
% 6.22/6.48  
% 6.22/6.48     dependent: set(hyper_res).
% 6.22/6.48     dependent: set(factor).
% 6.22/6.48     dependent: set(unit_deletion).
% 6.22/6.48  
% 6.22/6.48  ------------> process usable:
% 6.22/6.48  ** KEPT (pick-wt=5): 1 [] id(A,$c1)| -r1(A).
% 6.22/6.48  ** KEPT (pick-wt=5): 2 [] r1(A)| -id(A,$c1).
% 6.22/6.48  ** KEPT (pick-wt=7): 3 [] id(A,$f1(B))| -r2(B,A).
% 6.22/6.48  ** KEPT (pick-wt=7): 4 [] r2(A,B)| -id(B,$f1(A)).
% 6.22/6.48  ** KEPT (pick-wt=9): 5 [] id(A,$f2(B,C))| -r3(B,C,A).
% 6.22/6.48  ** KEPT (pick-wt=9): 6 [] r3(A,B,C)| -id(C,$f2(A,B)).
% 6.22/6.48  ** KEPT (pick-wt=9): 7 [] id(A,$f3(B,C))| -r4(B,C,A).
% 6.22/6.48  ** KEPT (pick-wt=9): 8 [] r4(A,B,C)| -id(C,$f3(A,B)).
% 6.22/6.48  ** KEPT (pick-wt=6): 9 [] -id(A,B)|id(B,A).
% 6.22/6.48  ** KEPT (pick-wt=9): 10 [] -id(A,B)|id(A,C)| -id(B,C).
% 6.22/6.48  ** KEPT (pick-wt=7): 11 [] -id(A,B)| -r1(A)|r1(B).
% 6.22/6.48  ** KEPT (pick-wt=7): 12 [] -id(A,B)| -r1(B)|r1(A).
% 6.22/6.48  ** KEPT (pick-wt=12): 13 [] -id(A,B)| -id(C,D)| -r2(A,C)|r2(B,D).
% 6.22/6.48  ** KEPT (pick-wt=12): 14 [] -id(A,B)| -id(C,D)| -r2(B,D)|r2(A,C).
% 6.22/6.48  ** KEPT (pick-wt=17): 15 [] -id(A,B)| -id(C,D)| -id(E,F)| -r3(A,C,E)|r3(B,D,F).
% 6.22/6.48  ** KEPT (pick-wt=17): 16 [] -id(A,B)| -id(C,D)| -id(E,F)| -r3(B,D,F)|r3(A,C,E).
% 6.22/6.48  ** KEPT (pick-wt=17): 17 [] -id(A,B)| -id(C,D)| -id(E,F)| -r4(A,C,E)|r4(B,D,F).
% 6.22/6.48  ** KEPT (pick-wt=17): 18 [] -id(A,B)| -id(C,D)| -id(E,F)| -r4(B,D,F)|r4(A,C,E).
% 6.22/6.48  ** KEPT (pick-wt=12): 19 [] -id(A,B)| -r2(C,A)| -r2(D,B)|id(C,D).
% 6.22/6.48  ** KEPT (pick-wt=8): 20 [] -id(A,B)| -r1(A)| -r2(C,B).
% 6.22/6.48  ** KEPT (pick-wt=12): 21 [] id(A,$f20(B,A))| -id(C,B)| -r3($c2,A,C).
% 6.22/6.48  ** KEPT (pick-wt=11): 22 [] r1($f20(A,B))| -id(C,A)| -r3($c2,B,C).
% 6.22/6.48  
% 6.22/6.48  ------------> process sos:
% 6.22/6.48  ** KEPT (pick-wt=3): 42 [] id(A,A).
% 6.22/6.48  ** KEPT (pick-wt=7): 43 [] id($f5(A,B),$f7(A,B)).
% 6.22/6.48  ** KEPT (pick-wt=5): 44 [] r2(A,$f4(B,A)).
% 6.22/6.48  ** KEPT (pick-wt=8): 45 [] r3(A,$f4(A,B),$f5(A,B)).
% 6.22/6.48  ** KEPT (pick-wt=7): 46 [] r2($f6(A,B),$f7(A,B)).
% 6.22/6.48  ** KEPT (pick-wt=6): 47 [] r3(A,B,$f6(A,B)).
% 6.22/6.48  ** KEPT (pick-wt=7): 48 [] id($f9(A,B),$f11(A,B)).
% 6.22/6.48  ** KEPT (pick-wt=5): 49 [] r2(A,$f8(B,A)).
% 6.22/6.48  ** KEPT (pick-wt=8): 50 [] r4(A,$f8(A,B),$f9(A,B)).
% 6.22/6.48  ** KEPT (pick-wt=8): 51 [] r3($f10(A,B),A,$f11(A,B)).
% 6.22/6.48  ** KEPT (pick-wt=6): 52 [] r4(A,B,$f10(A,B)).
% 6.22/6.48  ** KEPT (pick-wt=4): 53 [] id($f13(A),A).
% 6.22/6.48  ** KEPT (pick-wt=3): 54 [] r1($f12(A)).
% 6.22/6.48  ** KEPT (pick-wt=6): 55 [] r3(A,$f12(A),$f13(A)).
% 6.22/6.48  ** KEPT (pick-wt=3): 56 [] r1($f14(A)).
% 6.22/6.48  ** KEPT (pick-wt=6): 57 [] r4(A,$f14(A),$f16(A)).
% 6.22/6.48  ** KEPT (pick-wt=5): 58 [] id($f16(A),$f15(A)).
% 6.22/6.48  ** KEPT (pick-wt=3): 59 [] r1($f15(A)).
% 6.22/6.48  ** KEPT (pick-wt=8): 60 [] id(A,$f17(A))|id(A,$f18(A)).
% 6.22/6.48  ** KEPT (pick-wt=9): 61 [] id(A,$f17(A))|r2($f19(A),$f18(A)).
% 6.22/6.48  ** KEPT (pick-wt=7): 62 [] r1($f17(A))|id(A,$f18(A)).
% 6.22/6.48  ** KEPT (pick-wt=8): 63 [] r1($f17(A))|r2($f19(A),$f18(A)).
% 6.22/6.48  42 back subsumes 37.
% 6.22/6.48  
% 6.22/6.48  ======= end of input processing =======
% 6.22/6.48  
% 6.22/6.48  =========== start of search ===========
% 6.22/6.48  
% 6.22/6.48  
% 6.22/6.48  Resetting weight limit to 7.
% 6.22/6.48  
% 6.22/6.48  
% 6.22/6.48  Resetting weight limit to 7.
% 6.22/6.48  
% 6.22/6.48  sos_size=3218
% 6.22/6.48  
% 6.22/6.48  
% 6.22/6.48  Resetting weight limit to 6.
% 6.22/6.48  
% 6.22/6.48  
% 6.22/6.48  Resetting weight limit to 6.
% 6.22/6.48  
% 6.22/6.48  sos_size=3765
% 6.22/6.48  
% 6.22/6.48  -------- PROOF -------- 
% 6.22/6.48  
% 6.22/6.48  -----> EMPTY CLAUSE at   4.54 sec ----> 4759 [hyper,4758,20,104,4502] $F.
% 6.22/6.48  
% 6.22/6.48  Length of proof is 8.  Level of proof is 3.
% 6.22/6.48  
% 6.22/6.48  ---------------- PROOF ----------------
% 6.22/6.48  % SZS status Theorem
% 6.22/6.48  % SZS output start Refutation
% See solution above
% 6.22/6.48  ------------ end of proof -------------
% 6.22/6.48  
% 6.22/6.48  
% 6.22/6.48  Search stopped by max_proofs option.
% 6.22/6.48  
% 6.22/6.48  
% 6.22/6.48  Search stopped by max_proofs option.
% 6.22/6.48  
% 6.22/6.48  ============ end of search ============
% 6.22/6.48  
% 6.22/6.48  -------------- statistics -------------
% 6.22/6.48  clauses given                212
% 6.22/6.48  clauses generated        1143368
% 6.22/6.48  clauses kept                4758
% 6.22/6.48  clauses forward subsumed   78286
% 6.22/6.48  clauses back subsumed        612
% 6.22/6.48  Kbytes malloced             5859
% 6.22/6.48  
% 6.22/6.48  ----------- times (seconds) -----------
% 6.22/6.48  user CPU time          4.54          (0 hr, 0 min, 4 sec)
% 6.22/6.48  system CPU time        0.01          (0 hr, 0 min, 0 sec)
% 6.22/6.48  wall-clock time        6             (0 hr, 0 min, 6 sec)
% 6.22/6.48  
% 6.22/6.48  That finishes the proof of the theorem.
% 6.22/6.48  
% 6.22/6.48  Process 29140 finished Wed Jul 27 02:52:27 2022
% 6.22/6.48  Otter interrupted
% 6.22/6.48  PROOF FOUND
%------------------------------------------------------------------------------