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Otter---3.3.THM-Ref.s

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%------------------------------------------------------------------------------
% File     : Otter---3.3
% Problem  : SEU150+2 : TPTP v8.1.0. Released v3.3.0.
% Transfm  : none
% Format   : tptp:raw
% Command  : otter-tptp-script %s

% Computer : n026.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 13:14:56 EDT 2022

% Result   : Theorem 5.67s 5.87s
% Output   : Refutation 5.67s
% Verified : 
% SZS Type : Refutation
%            Derivation depth      :    8
%            Number of leaves      :   12
% Syntax   : Number of clauses     :   26 (  17 unt;   2 nHn;  15 RR)
%            Number of literals    :   42 (  25 equ;  15 neg)
%            Maximal clause size   :    4 (   1 avg)
%            Maximal term depth    :    2 (   1 avg)
%            Number of predicates  :    4 (   2 usr;   1 prp; 0-2 aty)
%            Number of functors    :    6 (   6 usr;   3 con; 0-2 aty)
%            Number of variables   :   44 (  10 sgn)

% Comments : 
%------------------------------------------------------------------------------
cnf(13,axiom,
    ( A != unordered_pair(B,C)
    | ~ in(D,A)
    | D = B
    | D = C ),
    file('SEU150+2.p',unknown),
    [] ).

cnf(14,axiom,
    ( A != unordered_pair(B,C)
    | in(D,A)
    | D != B ),
    file('SEU150+2.p',unknown),
    [] ).

cnf(15,axiom,
    ( A != unordered_pair(B,C)
    | in(D,A)
    | D != C ),
    file('SEU150+2.p',unknown),
    [] ).

cnf(23,axiom,
    ( ~ subset(A,B)
    | ~ in(C,A)
    | in(C,B) ),
    file('SEU150+2.p',unknown),
    [] ).

cnf(44,axiom,
    ( subset(singleton(A),B)
    | ~ in(A,B) ),
    file('SEU150+2.p',unknown),
    [] ).

cnf(73,axiom,
    ( singleton(A) != unordered_pair(B,C)
    | A = B ),
    file('SEU150+2.p',unknown),
    [] ).

cnf(74,axiom,
    dollar_c4 != dollar_c3,
    file('SEU150+2.p',unknown),
    [] ).

cnf(94,axiom,
    A = A,
    file('SEU150+2.p',unknown),
    [] ).

cnf(95,axiom,
    unordered_pair(A,B) = unordered_pair(B,A),
    file('SEU150+2.p',unknown),
    [] ).

cnf(109,axiom,
    set_union2(A,A) = A,
    file('SEU150+2.p',unknown),
    [] ).

cnf(140,axiom,
    unordered_pair(A,A) = singleton(A),
    file('SEU150+2.p',unknown),
    [] ).

cnf(142,plain,
    singleton(A) = unordered_pair(A,A),
    inference(flip,[status(thm),theory(equality)],[inference(copy,[status(thm)],[140])]),
    [iquote('copy,140,flip.1')] ).

cnf(144,axiom,
    singleton(dollar_c5) = unordered_pair(dollar_c4,dollar_c3),
    file('SEU150+2.p',unknown),
    [] ).

cnf(145,plain,
    unordered_pair(dollar_c5,dollar_c5) = unordered_pair(dollar_c4,dollar_c3),
    inference(demod,[status(thm),theory(equality)],[inference(copy,[status(thm)],[144]),142]),
    [iquote('copy,144,demod,142')] ).

cnf(176,plain,
    ( unordered_pair(A,A) != unordered_pair(B,C)
    | A = B ),
    inference(demod,[status(thm),theory(equality)],[inference(back_demod,[status(thm)],[73]),142]),
    [iquote('back_demod,73,demod,142')] ).

cnf(181,plain,
    ( subset(unordered_pair(A,A),B)
    | ~ in(A,B) ),
    inference(demod,[status(thm),theory(equality)],[inference(back_demod,[status(thm)],[44]),142]),
    [iquote('back_demod,44,demod,142')] ).

cnf(185,plain,
    in(A,unordered_pair(B,A)),
    inference(hyper,[status(thm)],[94,15,94]),
    [iquote('hyper,94,15,94')] ).

cnf(186,plain,
    in(A,unordered_pair(A,B)),
    inference(hyper,[status(thm)],[94,14,94]),
    [iquote('hyper,94,14,94')] ).

cnf(358,plain,
    ( A = B
    | C != unordered_pair(A,D)
    | ~ in(B,C)
    | B = D ),
    inference(demod,[status(thm),theory(equality)],[inference(para_into,[status(thm),theory(equality)],[109,13]),109,109]),
    [iquote('para_into,108.1.1,13.3.1,demod,109,109')] ).

cnf(1744,plain,
    dollar_c5 = dollar_c4,
    inference(hyper,[status(thm)],[176,145]),
    [iquote('hyper,176,145')] ).

cnf(1749,plain,
    unordered_pair(dollar_c4,dollar_c4) = unordered_pair(dollar_c4,dollar_c3),
    inference(demod,[status(thm),theory(equality)],[inference(back_demod,[status(thm)],[145]),1744,1744]),
    [iquote('back_demod,145,demod,1744,1744')] ).

cnf(1791,plain,
    subset(unordered_pair(A,A),unordered_pair(A,B)),
    inference(hyper,[status(thm)],[181,186]),
    [iquote('hyper,181,186')] ).

cnf(2032,plain,
    subset(unordered_pair(dollar_c4,dollar_c3),unordered_pair(dollar_c4,A)),
    inference(para_into,[status(thm),theory(equality)],[1791,1749]),
    [iquote('para_into,1791.1.1,1749.1.1')] ).

cnf(2131,plain,
    in(dollar_c3,unordered_pair(dollar_c4,A)),
    inference(hyper,[status(thm)],[2032,23,185]),
    [iquote('hyper,2032,23,185')] ).

cnf(2132,plain,
    A = dollar_c3,
    inference(unit_del,[status(thm)],[inference(hyper,[status(thm)],[2131,358,95]),74]),
    [iquote('hyper,2131,358,95,unit_del,74')] ).

cnf(2133,plain,
    $false,
    inference(binary,[status(thm)],[2132,74]),
    [iquote('binary,2132.1,74.1')] ).

%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.00/0.12  % Problem  : SEU150+2 : TPTP v8.1.0. Released v3.3.0.
% 0.12/0.13  % Command  : otter-tptp-script %s
% 0.13/0.34  % Computer : n026.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 : Wed Jul 27 08:07:09 EDT 2022
% 0.13/0.34  % CPUTime  : 
% 2.22/2.41  ----- Otter 3.3f, August 2004 -----
% 2.22/2.41  The process was started by sandbox2 on n026.cluster.edu,
% 2.22/2.41  Wed Jul 27 08:07:09 2022
% 2.22/2.41  The command was "./otter".  The process ID is 23663.
% 2.22/2.41  
% 2.22/2.41  set(prolog_style_variables).
% 2.22/2.41  set(auto).
% 2.22/2.41     dependent: set(auto1).
% 2.22/2.41     dependent: set(process_input).
% 2.22/2.41     dependent: clear(print_kept).
% 2.22/2.41     dependent: clear(print_new_demod).
% 2.22/2.41     dependent: clear(print_back_demod).
% 2.22/2.41     dependent: clear(print_back_sub).
% 2.22/2.41     dependent: set(control_memory).
% 2.22/2.41     dependent: assign(max_mem, 12000).
% 2.22/2.41     dependent: assign(pick_given_ratio, 4).
% 2.22/2.41     dependent: assign(stats_level, 1).
% 2.22/2.41     dependent: assign(max_seconds, 10800).
% 2.22/2.41  clear(print_given).
% 2.22/2.41  
% 2.22/2.41  formula_list(usable).
% 2.22/2.41  all A (A=A).
% 2.22/2.41  all A B (in(A,B)-> -in(B,A)).
% 2.22/2.41  all A B (proper_subset(A,B)-> -proper_subset(B,A)).
% 2.22/2.41  all A B (unordered_pair(A,B)=unordered_pair(B,A)).
% 2.22/2.41  all A B (set_union2(A,B)=set_union2(B,A)).
% 2.22/2.41  all A B (set_intersection2(A,B)=set_intersection2(B,A)).
% 2.22/2.41  all A B (A=B<->subset(A,B)&subset(B,A)).
% 2.22/2.41  all A B (B=singleton(A)<-> (all C (in(C,B)<->C=A))).
% 2.22/2.41  all A (A=empty_set<-> (all B (-in(B,A)))).
% 2.22/2.41  all A B (B=powerset(A)<-> (all C (in(C,B)<->subset(C,A)))).
% 2.22/2.41  all A B C (C=unordered_pair(A,B)<-> (all D (in(D,C)<->D=A|D=B))).
% 2.22/2.41  all A B C (C=set_union2(A,B)<-> (all D (in(D,C)<->in(D,A)|in(D,B)))).
% 2.22/2.41  all A B (subset(A,B)<-> (all C (in(C,A)->in(C,B)))).
% 2.22/2.41  all A B C (C=set_intersection2(A,B)<-> (all D (in(D,C)<->in(D,A)&in(D,B)))).
% 2.22/2.41  all A B C (C=set_difference(A,B)<-> (all D (in(D,C)<->in(D,A)& -in(D,B)))).
% 2.22/2.41  all A B (disjoint(A,B)<->set_intersection2(A,B)=empty_set).
% 2.22/2.41  all A B (proper_subset(A,B)<->subset(A,B)&A!=B).
% 2.22/2.41  $T.
% 2.22/2.41  $T.
% 2.22/2.41  $T.
% 2.22/2.41  $T.
% 2.22/2.41  $T.
% 2.22/2.41  $T.
% 2.22/2.41  $T.
% 2.22/2.41  empty(empty_set).
% 2.22/2.41  all A B (-empty(A)-> -empty(set_union2(A,B))).
% 2.22/2.41  all A B (-empty(A)-> -empty(set_union2(B,A))).
% 2.22/2.41  all A B (set_union2(A,A)=A).
% 2.22/2.41  all A B (set_intersection2(A,A)=A).
% 2.22/2.41  all A B (-proper_subset(A,A)).
% 2.22/2.41  all A (singleton(A)!=empty_set).
% 2.22/2.41  all A B (subset(singleton(A),B)<->in(A,B)).
% 2.22/2.41  all A B (set_difference(A,B)=empty_set<->subset(A,B)).
% 2.22/2.41  all A B C (subset(A,B)->in(C,A)|subset(A,set_difference(B,singleton(C)))).
% 2.22/2.41  all A B (subset(A,singleton(B))<->A=empty_set|A=singleton(B)).
% 2.22/2.41  exists A empty(A).
% 2.22/2.41  exists A (-empty(A)).
% 2.22/2.41  all A B subset(A,A).
% 2.22/2.41  all A B (disjoint(A,B)->disjoint(B,A)).
% 2.22/2.41  all A B (subset(A,B)->set_union2(A,B)=B).
% 2.22/2.41  all A B subset(set_intersection2(A,B),A).
% 2.22/2.41  all A B C (subset(A,B)&subset(A,C)->subset(A,set_intersection2(B,C))).
% 2.22/2.41  all A (set_union2(A,empty_set)=A).
% 2.22/2.41  all A B C (subset(A,B)&subset(B,C)->subset(A,C)).
% 2.22/2.41  powerset(empty_set)=singleton(empty_set).
% 2.22/2.41  all A B C (subset(A,B)->subset(set_intersection2(A,C),set_intersection2(B,C))).
% 2.22/2.41  all A B (subset(A,B)->set_intersection2(A,B)=A).
% 2.22/2.41  all A (set_intersection2(A,empty_set)=empty_set).
% 2.22/2.41  all A B ((all C (in(C,A)<->in(C,B)))->A=B).
% 2.22/2.41  all A subset(empty_set,A).
% 2.22/2.41  all A B C (subset(A,B)->subset(set_difference(A,C),set_difference(B,C))).
% 2.22/2.41  all A B subset(set_difference(A,B),A).
% 2.22/2.41  all A B (set_difference(A,B)=empty_set<->subset(A,B)).
% 2.22/2.41  all A B (set_union2(A,set_difference(B,A))=set_union2(A,B)).
% 2.22/2.41  all A (set_difference(A,empty_set)=A).
% 2.22/2.41  all A B (-(-disjoint(A,B)& (all C (-(in(C,A)&in(C,B)))))& -((exists C (in(C,A)&in(C,B)))&disjoint(A,B))).
% 2.22/2.41  all A (subset(A,empty_set)->A=empty_set).
% 2.22/2.41  all A B (set_difference(set_union2(A,B),B)=set_difference(A,B)).
% 2.22/2.41  all A B (subset(A,B)->B=set_union2(A,set_difference(B,A))).
% 2.22/2.41  all A B (set_difference(A,set_difference(A,B))=set_intersection2(A,B)).
% 2.22/2.41  all A (set_difference(empty_set,A)=empty_set).
% 2.22/2.41  all A B (-(-disjoint(A,B)& (all C (-in(C,set_intersection2(A,B)))))& -((exists C in(C,set_intersection2(A,B)))&disjoint(A,B))).
% 2.22/2.41  all A B (-(subset(A,B)&proper_subset(B,A))).
% 2.22/2.41  all A B C (subset(A,B)&disjoint(B,C)->disjoint(A,C)).
% 2.22/2.41  all A (unordered_pair(A,A)=singleton(A)).
% 2.22/2.41  all A (empty(A)->A=empty_set).
% 2.22/2.41  all A B (subset(singleton(A),singleton(B))->A=B).
% 2.22/2.41  all A B (-(in(A,B)&empty(B))).
% 2.22/2.41  all A B subset(A,set_union2(A,B)).
% 2.22/2.41  all A B (disjoint(A,B)<->set_difference(A,B)=A).
% 2.22/2.41  all A B (-(empty(A)&A!=B&empty(B))).
% 2.22/2.41  all A B C (subset(A,B)&subset(C,B)->subset(set_union2(A,C),B)).
% 2.22/2.41  all A B C (singleton(A)=unordered_pair(B,C)->A=B).
% 2.22/2.41  -(all A B C (singleton(A)=unordered_pair(B,C)->B=C)).
% 2.22/2.41  end_of_list.
% 2.22/2.41  
% 2.22/2.41  -------> usable clausifies to:
% 2.22/2.41  
% 2.22/2.41  list(usable).
% 2.22/2.41  0 [] A=A.
% 2.22/2.41  0 [] -in(A,B)| -in(B,A).
% 2.22/2.41  0 [] -proper_subset(A,B)| -proper_subset(B,A).
% 2.22/2.41  0 [] unordered_pair(A,B)=unordered_pair(B,A).
% 2.22/2.41  0 [] set_union2(A,B)=set_union2(B,A).
% 2.22/2.41  0 [] set_intersection2(A,B)=set_intersection2(B,A).
% 2.22/2.41  0 [] A!=B|subset(A,B).
% 2.22/2.41  0 [] A!=B|subset(B,A).
% 2.22/2.41  0 [] A=B| -subset(A,B)| -subset(B,A).
% 2.22/2.41  0 [] B!=singleton(A)| -in(C,B)|C=A.
% 2.22/2.41  0 [] B!=singleton(A)|in(C,B)|C!=A.
% 2.22/2.41  0 [] B=singleton(A)|in($f1(A,B),B)|$f1(A,B)=A.
% 2.22/2.41  0 [] B=singleton(A)| -in($f1(A,B),B)|$f1(A,B)!=A.
% 2.22/2.41  0 [] A!=empty_set| -in(B,A).
% 2.22/2.41  0 [] A=empty_set|in($f2(A),A).
% 2.22/2.41  0 [] B!=powerset(A)| -in(C,B)|subset(C,A).
% 2.22/2.41  0 [] B!=powerset(A)|in(C,B)| -subset(C,A).
% 2.22/2.41  0 [] B=powerset(A)|in($f3(A,B),B)|subset($f3(A,B),A).
% 2.22/2.41  0 [] B=powerset(A)| -in($f3(A,B),B)| -subset($f3(A,B),A).
% 2.22/2.41  0 [] C!=unordered_pair(A,B)| -in(D,C)|D=A|D=B.
% 2.22/2.41  0 [] C!=unordered_pair(A,B)|in(D,C)|D!=A.
% 2.22/2.41  0 [] C!=unordered_pair(A,B)|in(D,C)|D!=B.
% 2.22/2.41  0 [] C=unordered_pair(A,B)|in($f4(A,B,C),C)|$f4(A,B,C)=A|$f4(A,B,C)=B.
% 2.22/2.41  0 [] C=unordered_pair(A,B)| -in($f4(A,B,C),C)|$f4(A,B,C)!=A.
% 2.22/2.41  0 [] C=unordered_pair(A,B)| -in($f4(A,B,C),C)|$f4(A,B,C)!=B.
% 2.22/2.41  0 [] C!=set_union2(A,B)| -in(D,C)|in(D,A)|in(D,B).
% 2.22/2.41  0 [] C!=set_union2(A,B)|in(D,C)| -in(D,A).
% 2.22/2.41  0 [] C!=set_union2(A,B)|in(D,C)| -in(D,B).
% 2.22/2.41  0 [] C=set_union2(A,B)|in($f5(A,B,C),C)|in($f5(A,B,C),A)|in($f5(A,B,C),B).
% 2.22/2.41  0 [] C=set_union2(A,B)| -in($f5(A,B,C),C)| -in($f5(A,B,C),A).
% 2.22/2.41  0 [] C=set_union2(A,B)| -in($f5(A,B,C),C)| -in($f5(A,B,C),B).
% 2.22/2.41  0 [] -subset(A,B)| -in(C,A)|in(C,B).
% 2.22/2.41  0 [] subset(A,B)|in($f6(A,B),A).
% 2.22/2.41  0 [] subset(A,B)| -in($f6(A,B),B).
% 2.22/2.41  0 [] C!=set_intersection2(A,B)| -in(D,C)|in(D,A).
% 2.22/2.41  0 [] C!=set_intersection2(A,B)| -in(D,C)|in(D,B).
% 2.22/2.41  0 [] C!=set_intersection2(A,B)|in(D,C)| -in(D,A)| -in(D,B).
% 2.22/2.41  0 [] C=set_intersection2(A,B)|in($f7(A,B,C),C)|in($f7(A,B,C),A).
% 2.22/2.41  0 [] C=set_intersection2(A,B)|in($f7(A,B,C),C)|in($f7(A,B,C),B).
% 2.22/2.41  0 [] C=set_intersection2(A,B)| -in($f7(A,B,C),C)| -in($f7(A,B,C),A)| -in($f7(A,B,C),B).
% 2.22/2.41  0 [] C!=set_difference(A,B)| -in(D,C)|in(D,A).
% 2.22/2.41  0 [] C!=set_difference(A,B)| -in(D,C)| -in(D,B).
% 2.22/2.41  0 [] C!=set_difference(A,B)|in(D,C)| -in(D,A)|in(D,B).
% 2.22/2.41  0 [] C=set_difference(A,B)|in($f8(A,B,C),C)|in($f8(A,B,C),A).
% 2.22/2.41  0 [] C=set_difference(A,B)|in($f8(A,B,C),C)| -in($f8(A,B,C),B).
% 2.22/2.41  0 [] C=set_difference(A,B)| -in($f8(A,B,C),C)| -in($f8(A,B,C),A)|in($f8(A,B,C),B).
% 2.22/2.41  0 [] -disjoint(A,B)|set_intersection2(A,B)=empty_set.
% 2.22/2.41  0 [] disjoint(A,B)|set_intersection2(A,B)!=empty_set.
% 2.22/2.41  0 [] -proper_subset(A,B)|subset(A,B).
% 2.22/2.41  0 [] -proper_subset(A,B)|A!=B.
% 2.22/2.41  0 [] proper_subset(A,B)| -subset(A,B)|A=B.
% 2.22/2.41  0 [] $T.
% 2.22/2.41  0 [] $T.
% 2.22/2.41  0 [] $T.
% 2.22/2.41  0 [] $T.
% 2.22/2.41  0 [] $T.
% 2.22/2.41  0 [] $T.
% 2.22/2.41  0 [] $T.
% 2.22/2.41  0 [] empty(empty_set).
% 2.22/2.41  0 [] empty(A)| -empty(set_union2(A,B)).
% 2.22/2.41  0 [] empty(A)| -empty(set_union2(B,A)).
% 2.22/2.41  0 [] set_union2(A,A)=A.
% 2.22/2.41  0 [] set_intersection2(A,A)=A.
% 2.22/2.41  0 [] -proper_subset(A,A).
% 2.22/2.41  0 [] singleton(A)!=empty_set.
% 2.22/2.41  0 [] -subset(singleton(A),B)|in(A,B).
% 2.22/2.41  0 [] subset(singleton(A),B)| -in(A,B).
% 2.22/2.41  0 [] set_difference(A,B)!=empty_set|subset(A,B).
% 2.22/2.41  0 [] set_difference(A,B)=empty_set| -subset(A,B).
% 2.22/2.41  0 [] -subset(A,B)|in(C,A)|subset(A,set_difference(B,singleton(C))).
% 2.22/2.41  0 [] -subset(A,singleton(B))|A=empty_set|A=singleton(B).
% 2.22/2.41  0 [] subset(A,singleton(B))|A!=empty_set.
% 2.22/2.41  0 [] subset(A,singleton(B))|A!=singleton(B).
% 2.22/2.41  0 [] empty($c1).
% 2.22/2.41  0 [] -empty($c2).
% 2.22/2.41  0 [] subset(A,A).
% 2.22/2.41  0 [] -disjoint(A,B)|disjoint(B,A).
% 2.22/2.41  0 [] -subset(A,B)|set_union2(A,B)=B.
% 2.22/2.41  0 [] subset(set_intersection2(A,B),A).
% 2.22/2.41  0 [] -subset(A,B)| -subset(A,C)|subset(A,set_intersection2(B,C)).
% 2.22/2.41  0 [] set_union2(A,empty_set)=A.
% 2.22/2.41  0 [] -subset(A,B)| -subset(B,C)|subset(A,C).
% 2.22/2.41  0 [] powerset(empty_set)=singleton(empty_set).
% 2.22/2.41  0 [] -subset(A,B)|subset(set_intersection2(A,C),set_intersection2(B,C)).
% 2.22/2.41  0 [] -subset(A,B)|set_intersection2(A,B)=A.
% 2.22/2.41  0 [] set_intersection2(A,empty_set)=empty_set.
% 2.22/2.41  0 [] in($f9(A,B),A)|in($f9(A,B),B)|A=B.
% 2.22/2.41  0 [] -in($f9(A,B),A)| -in($f9(A,B),B)|A=B.
% 2.22/2.41  0 [] subset(empty_set,A).
% 2.22/2.41  0 [] -subset(A,B)|subset(set_difference(A,C),set_difference(B,C)).
% 2.22/2.41  0 [] subset(set_difference(A,B),A).
% 2.22/2.41  0 [] set_difference(A,B)!=empty_set|subset(A,B).
% 2.22/2.41  0 [] set_difference(A,B)=empty_set| -subset(A,B).
% 2.22/2.41  0 [] set_union2(A,set_difference(B,A))=set_union2(A,B).
% 2.22/2.41  0 [] set_difference(A,empty_set)=A.
% 2.22/2.41  0 [] disjoint(A,B)|in($f10(A,B),A).
% 2.22/2.41  0 [] disjoint(A,B)|in($f10(A,B),B).
% 2.22/2.41  0 [] -in(C,A)| -in(C,B)| -disjoint(A,B).
% 2.22/2.41  0 [] -subset(A,empty_set)|A=empty_set.
% 2.22/2.41  0 [] set_difference(set_union2(A,B),B)=set_difference(A,B).
% 2.22/2.41  0 [] -subset(A,B)|B=set_union2(A,set_difference(B,A)).
% 2.22/2.41  0 [] set_difference(A,set_difference(A,B))=set_intersection2(A,B).
% 2.22/2.41  0 [] set_difference(empty_set,A)=empty_set.
% 2.22/2.41  0 [] disjoint(A,B)|in($f11(A,B),set_intersection2(A,B)).
% 2.22/2.41  0 [] -in(C,set_intersection2(A,B))| -disjoint(A,B).
% 2.22/2.41  0 [] -subset(A,B)| -proper_subset(B,A).
% 2.22/2.41  0 [] -subset(A,B)| -disjoint(B,C)|disjoint(A,C).
% 2.22/2.41  0 [] unordered_pair(A,A)=singleton(A).
% 2.22/2.41  0 [] -empty(A)|A=empty_set.
% 2.22/2.41  0 [] -subset(singleton(A),singleton(B))|A=B.
% 2.22/2.41  0 [] -in(A,B)| -empty(B).
% 2.22/2.41  0 [] subset(A,set_union2(A,B)).
% 2.22/2.41  0 [] -disjoint(A,B)|set_difference(A,B)=A.
% 2.22/2.41  0 [] disjoint(A,B)|set_difference(A,B)!=A.
% 2.22/2.41  0 [] -empty(A)|A=B| -empty(B).
% 2.22/2.41  0 [] -subset(A,B)| -subset(C,B)|subset(set_union2(A,C),B).
% 2.22/2.41  0 [] singleton(A)!=unordered_pair(B,C)|A=B.
% 2.22/2.41  0 [] singleton($c5)=unordered_pair($c4,$c3).
% 2.22/2.41  0 [] $c4!=$c3.
% 2.22/2.41  end_of_list.
% 2.22/2.41  
% 2.22/2.41  SCAN INPUT: prop=0, horn=0, equality=1, symmetry=0, max_lits=4.
% 2.22/2.41  
% 2.22/2.41  This ia a non-Horn set with equality.  The strategy will be
% 2.22/2.41  Knuth-Bendix, ordered hyper_res, factoring, and unit
% 2.22/2.41  deletion, with positive clauses in sos and nonpositive
% 2.22/2.41  clauses in usable.
% 2.22/2.41  
% 2.22/2.41     dependent: set(knuth_bendix).
% 2.22/2.41     dependent: set(anl_eq).
% 2.22/2.41     dependent: set(para_from).
% 2.22/2.41     dependent: set(para_into).
% 2.22/2.41     dependent: clear(para_from_right).
% 2.22/2.41     dependent: clear(para_into_right).
% 2.22/2.41     dependent: set(para_from_vars).
% 2.22/2.41     dependent: set(eq_units_both_ways).
% 2.22/2.41     dependent: set(dynamic_demod_all).
% 2.22/2.41     dependent: set(dynamic_demod).
% 2.22/2.41     dependent: set(order_eq).
% 2.22/2.41     dependent: set(back_demod).
% 2.22/2.41     dependent: set(lrpo).
% 2.22/2.41     dependent: set(hyper_res).
% 2.22/2.41     dependent: set(unit_deletion).
% 2.22/2.41     dependent: set(factor).
% 2.22/2.41  
% 2.22/2.41  ------------> process usable:
% 2.22/2.41  ** KEPT (pick-wt=6): 1 [] -in(A,B)| -in(B,A).
% 2.22/2.41  ** KEPT (pick-wt=6): 2 [] -proper_subset(A,B)| -proper_subset(B,A).
% 2.22/2.41  ** KEPT (pick-wt=6): 3 [] A!=B|subset(A,B).
% 2.22/2.41  ** KEPT (pick-wt=6): 4 [] A!=B|subset(B,A).
% 2.22/2.41  ** KEPT (pick-wt=9): 5 [] A=B| -subset(A,B)| -subset(B,A).
% 2.22/2.41  ** KEPT (pick-wt=10): 6 [] A!=singleton(B)| -in(C,A)|C=B.
% 2.22/2.41  ** KEPT (pick-wt=10): 7 [] A!=singleton(B)|in(C,A)|C!=B.
% 2.22/2.41  ** KEPT (pick-wt=14): 8 [] A=singleton(B)| -in($f1(B,A),A)|$f1(B,A)!=B.
% 2.22/2.41  ** KEPT (pick-wt=6): 9 [] A!=empty_set| -in(B,A).
% 2.22/2.41  ** KEPT (pick-wt=10): 10 [] A!=powerset(B)| -in(C,A)|subset(C,B).
% 2.22/2.41  ** KEPT (pick-wt=10): 11 [] A!=powerset(B)|in(C,A)| -subset(C,B).
% 2.22/2.41  ** KEPT (pick-wt=14): 12 [] A=powerset(B)| -in($f3(B,A),A)| -subset($f3(B,A),B).
% 2.22/2.41  ** KEPT (pick-wt=14): 13 [] A!=unordered_pair(B,C)| -in(D,A)|D=B|D=C.
% 2.22/2.41  ** KEPT (pick-wt=11): 14 [] A!=unordered_pair(B,C)|in(D,A)|D!=B.
% 2.22/2.41  ** KEPT (pick-wt=11): 15 [] A!=unordered_pair(B,C)|in(D,A)|D!=C.
% 2.22/2.41  ** KEPT (pick-wt=17): 16 [] A=unordered_pair(B,C)| -in($f4(B,C,A),A)|$f4(B,C,A)!=B.
% 2.22/2.41  ** KEPT (pick-wt=17): 17 [] A=unordered_pair(B,C)| -in($f4(B,C,A),A)|$f4(B,C,A)!=C.
% 2.22/2.41  ** KEPT (pick-wt=14): 18 [] A!=set_union2(B,C)| -in(D,A)|in(D,B)|in(D,C).
% 2.22/2.41  ** KEPT (pick-wt=11): 19 [] A!=set_union2(B,C)|in(D,A)| -in(D,B).
% 2.22/2.41  ** KEPT (pick-wt=11): 20 [] A!=set_union2(B,C)|in(D,A)| -in(D,C).
% 2.22/2.41  ** KEPT (pick-wt=17): 21 [] A=set_union2(B,C)| -in($f5(B,C,A),A)| -in($f5(B,C,A),B).
% 2.22/2.41  ** KEPT (pick-wt=17): 22 [] A=set_union2(B,C)| -in($f5(B,C,A),A)| -in($f5(B,C,A),C).
% 2.22/2.41  ** KEPT (pick-wt=9): 23 [] -subset(A,B)| -in(C,A)|in(C,B).
% 2.22/2.41  ** KEPT (pick-wt=8): 24 [] subset(A,B)| -in($f6(A,B),B).
% 2.22/2.41  ** KEPT (pick-wt=11): 25 [] A!=set_intersection2(B,C)| -in(D,A)|in(D,B).
% 2.22/2.41  ** KEPT (pick-wt=11): 26 [] A!=set_intersection2(B,C)| -in(D,A)|in(D,C).
% 2.22/2.41  ** KEPT (pick-wt=14): 27 [] A!=set_intersection2(B,C)|in(D,A)| -in(D,B)| -in(D,C).
% 2.22/2.41  ** KEPT (pick-wt=23): 28 [] A=set_intersection2(B,C)| -in($f7(B,C,A),A)| -in($f7(B,C,A),B)| -in($f7(B,C,A),C).
% 2.22/2.41  ** KEPT (pick-wt=11): 29 [] A!=set_difference(B,C)| -in(D,A)|in(D,B).
% 2.22/2.41  ** KEPT (pick-wt=11): 30 [] A!=set_difference(B,C)| -in(D,A)| -in(D,C).
% 2.22/2.41  ** KEPT (pick-wt=14): 31 [] A!=set_difference(B,C)|in(D,A)| -in(D,B)|in(D,C).
% 2.22/2.41  ** KEPT (pick-wt=17): 32 [] A=set_difference(B,C)|in($f8(B,C,A),A)| -in($f8(B,C,A),C).
% 2.22/2.41  ** KEPT (pick-wt=23): 33 [] A=set_difference(B,C)| -in($f8(B,C,A),A)| -in($f8(B,C,A),B)|in($f8(B,C,A),C).
% 2.22/2.41  ** KEPT (pick-wt=8): 34 [] -disjoint(A,B)|set_intersection2(A,B)=empty_set.
% 2.22/2.42  ** KEPT (pick-wt=8): 35 [] disjoint(A,B)|set_intersection2(A,B)!=empty_set.
% 2.22/2.42  ** KEPT (pick-wt=6): 36 [] -proper_subset(A,B)|subset(A,B).
% 2.22/2.42  ** KEPT (pick-wt=6): 37 [] -proper_subset(A,B)|A!=B.
% 2.22/2.42  ** KEPT (pick-wt=9): 38 [] proper_subset(A,B)| -subset(A,B)|A=B.
% 2.22/2.42  ** KEPT (pick-wt=6): 39 [] empty(A)| -empty(set_union2(A,B)).
% 2.22/2.42  ** KEPT (pick-wt=6): 40 [] empty(A)| -empty(set_union2(B,A)).
% 2.22/2.42  ** KEPT (pick-wt=3): 41 [] -proper_subset(A,A).
% 2.22/2.42  ** KEPT (pick-wt=4): 42 [] singleton(A)!=empty_set.
% 2.22/2.42  ** KEPT (pick-wt=7): 43 [] -subset(singleton(A),B)|in(A,B).
% 2.22/2.42  ** KEPT (pick-wt=7): 44 [] subset(singleton(A),B)| -in(A,B).
% 2.22/2.42  ** KEPT (pick-wt=8): 45 [] set_difference(A,B)!=empty_set|subset(A,B).
% 2.22/2.42  ** KEPT (pick-wt=8): 46 [] set_difference(A,B)=empty_set| -subset(A,B).
% 2.22/2.42  ** KEPT (pick-wt=12): 47 [] -subset(A,B)|in(C,A)|subset(A,set_difference(B,singleton(C))).
% 2.22/2.42  ** KEPT (pick-wt=11): 48 [] -subset(A,singleton(B))|A=empty_set|A=singleton(B).
% 2.22/2.42  ** KEPT (pick-wt=7): 49 [] subset(A,singleton(B))|A!=empty_set.
% 2.22/2.42    Following clause subsumed by 3 during input processing: 0 [] subset(A,singleton(B))|A!=singleton(B).
% 2.22/2.42  ** KEPT (pick-wt=2): 50 [] -empty($c2).
% 2.22/2.42  ** KEPT (pick-wt=6): 51 [] -disjoint(A,B)|disjoint(B,A).
% 2.22/2.42  ** KEPT (pick-wt=8): 52 [] -subset(A,B)|set_union2(A,B)=B.
% 2.22/2.42  ** KEPT (pick-wt=11): 53 [] -subset(A,B)| -subset(A,C)|subset(A,set_intersection2(B,C)).
% 2.22/2.42  ** KEPT (pick-wt=9): 54 [] -subset(A,B)| -subset(B,C)|subset(A,C).
% 2.22/2.42  ** KEPT (pick-wt=10): 55 [] -subset(A,B)|subset(set_intersection2(A,C),set_intersection2(B,C)).
% 2.22/2.42  ** KEPT (pick-wt=8): 56 [] -subset(A,B)|set_intersection2(A,B)=A.
% 2.22/2.42  ** KEPT (pick-wt=13): 57 [] -in($f9(A,B),A)| -in($f9(A,B),B)|A=B.
% 2.22/2.42  ** KEPT (pick-wt=10): 58 [] -subset(A,B)|subset(set_difference(A,C),set_difference(B,C)).
% 2.22/2.42    Following clause subsumed by 45 during input processing: 0 [] set_difference(A,B)!=empty_set|subset(A,B).
% 2.22/2.42    Following clause subsumed by 46 during input processing: 0 [] set_difference(A,B)=empty_set| -subset(A,B).
% 2.22/2.42  ** KEPT (pick-wt=9): 59 [] -in(A,B)| -in(A,C)| -disjoint(B,C).
% 2.22/2.42  ** KEPT (pick-wt=6): 60 [] -subset(A,empty_set)|A=empty_set.
% 2.22/2.42  ** KEPT (pick-wt=10): 62 [copy,61,flip.2] -subset(A,B)|set_union2(A,set_difference(B,A))=B.
% 2.22/2.42  ** KEPT (pick-wt=8): 63 [] -in(A,set_intersection2(B,C))| -disjoint(B,C).
% 2.22/2.42  ** KEPT (pick-wt=6): 64 [] -subset(A,B)| -proper_subset(B,A).
% 2.22/2.42  ** KEPT (pick-wt=9): 65 [] -subset(A,B)| -disjoint(B,C)|disjoint(A,C).
% 2.22/2.42  ** KEPT (pick-wt=5): 66 [] -empty(A)|A=empty_set.
% 2.22/2.42  ** KEPT (pick-wt=8): 67 [] -subset(singleton(A),singleton(B))|A=B.
% 2.22/2.42  ** KEPT (pick-wt=5): 68 [] -in(A,B)| -empty(B).
% 2.22/2.42  ** KEPT (pick-wt=8): 69 [] -disjoint(A,B)|set_difference(A,B)=A.
% 2.22/2.42  ** KEPT (pick-wt=8): 70 [] disjoint(A,B)|set_difference(A,B)!=A.
% 2.22/2.42  ** KEPT (pick-wt=7): 71 [] -empty(A)|A=B| -empty(B).
% 2.22/2.42  ** KEPT (pick-wt=11): 72 [] -subset(A,B)| -subset(C,B)|subset(set_union2(A,C),B).
% 2.22/2.42  ** KEPT (pick-wt=9): 73 [] singleton(A)!=unordered_pair(B,C)|A=B.
% 2.22/2.42  ** KEPT (pick-wt=3): 74 [] $c4!=$c3.
% 2.22/2.42  
% 2.22/2.42  ------------> process sos:
% 2.22/2.42  ** KEPT (pick-wt=3): 94 [] A=A.
% 2.22/2.42  ** KEPT (pick-wt=7): 95 [] unordered_pair(A,B)=unordered_pair(B,A).
% 2.22/2.42  ** KEPT (pick-wt=7): 96 [] set_union2(A,B)=set_union2(B,A).
% 2.22/2.42  ** KEPT (pick-wt=7): 97 [] set_intersection2(A,B)=set_intersection2(B,A).
% 2.22/2.42  ** KEPT (pick-wt=14): 98 [] A=singleton(B)|in($f1(B,A),A)|$f1(B,A)=B.
% 2.22/2.42  ** KEPT (pick-wt=7): 99 [] A=empty_set|in($f2(A),A).
% 2.22/2.42  ** KEPT (pick-wt=14): 100 [] A=powerset(B)|in($f3(B,A),A)|subset($f3(B,A),B).
% 2.22/2.42  ** KEPT (pick-wt=23): 101 [] A=unordered_pair(B,C)|in($f4(B,C,A),A)|$f4(B,C,A)=B|$f4(B,C,A)=C.
% 2.22/2.42  ** KEPT (pick-wt=23): 102 [] A=set_union2(B,C)|in($f5(B,C,A),A)|in($f5(B,C,A),B)|in($f5(B,C,A),C).
% 2.22/2.42  ** KEPT (pick-wt=8): 103 [] subset(A,B)|in($f6(A,B),A).
% 2.22/2.42  ** KEPT (pick-wt=17): 104 [] A=set_intersection2(B,C)|in($f7(B,C,A),A)|in($f7(B,C,A),B).
% 2.22/2.42  ** KEPT (pick-wt=17): 105 [] A=set_intersection2(B,C)|in($f7(B,C,A),A)|in($f7(B,C,A),C).
% 2.22/2.42  ** KEPT (pick-wt=17): 106 [] A=set_difference(B,C)|in($f8(B,C,A),A)|in($f8(B,C,A),B).
% 2.22/2.42  ** KEPT (pick-wt=2): 107 [] empty(empty_set).
% 2.22/2.42  ** KEPT (pick-wt=5): 108 [] set_union2(A,A)=A.
% 2.22/2.42  ---> New Demodulator: 109 [new_demod,108] set_union2(A,A)=A.
% 2.22/2.42  ** KEPT (pick-wt=5): 110 [] set_intersection2(A,A)=A.
% 2.22/2.42  ---> New Demodulator: 111 [new_demod,110] set_intersection2(A,A)=A.
% 2.22/2.42  ** KEPT (pick-wt=2): 112 [] empty($c1).
% 2.22/2.42  ** KEPT (pick-wt=3): 113 [] subset(A,A).
% 2.22/2.42  ** KEPT (pick-wt=5): 114 [] subset(set_intersection2(A,B),A).
% 2.22/2.42  ** KEPT (pick-wt=5): 115 [] set_union2(A,empty_set)=A.
% 2.22/2.42  ---> New Demodulator: 116 [new_demod,115] set_union2(A,empty_set)=A.
% 2.22/2.42  ** KEPT (pick-wt=5): 118 [copy,117,flip.1] singleton(empty_set)=powerset(empty_set).
% 2.22/2.42  ---> New Demodulator: 119 [new_demod,118] singleton(empty_set)=powerset(empty_set).
% 2.22/2.42  ** KEPT (pick-wt=5): 120 [] set_intersection2(A,empty_set)=empty_set.
% 2.22/2.42  ---> New Demodulator: 121 [new_demod,120] set_intersection2(A,empty_set)=empty_set.
% 2.22/2.42  ** KEPT (pick-wt=13): 122 [] in($f9(A,B),A)|in($f9(A,B),B)|A=B.
% 2.22/2.42  ** KEPT (pick-wt=3): 123 [] subset(empty_set,A).
% 2.22/2.42  ** KEPT (pick-wt=5): 124 [] subset(set_difference(A,B),A).
% 2.22/2.42  ** KEPT (pick-wt=9): 125 [] set_union2(A,set_difference(B,A))=set_union2(A,B).
% 2.22/2.42  ---> New Demodulator: 126 [new_demod,125] set_union2(A,set_difference(B,A))=set_union2(A,B).
% 2.22/2.42  ** KEPT (pick-wt=5): 127 [] set_difference(A,empty_set)=A.
% 2.22/2.42  ---> New Demodulator: 128 [new_demod,127] set_difference(A,empty_set)=A.
% 2.22/2.42  ** KEPT (pick-wt=8): 129 [] disjoint(A,B)|in($f10(A,B),A).
% 2.22/2.42  ** KEPT (pick-wt=8): 130 [] disjoint(A,B)|in($f10(A,B),B).
% 2.22/2.42  ** KEPT (pick-wt=9): 131 [] set_difference(set_union2(A,B),B)=set_difference(A,B).
% 2.22/2.42  ---> New Demodulator: 132 [new_demod,131] set_difference(set_union2(A,B),B)=set_difference(A,B).
% 2.22/2.42  ** KEPT (pick-wt=9): 134 [copy,133,flip.1] set_intersection2(A,B)=set_difference(A,set_difference(A,B)).
% 2.22/2.42  ---> New Demodulator: 135 [new_demod,134] set_intersection2(A,B)=set_difference(A,set_difference(A,B)).
% 2.22/2.42  ** KEPT (pick-wt=5): 136 [] set_difference(empty_set,A)=empty_set.
% 2.22/2.42  ---> New Demodulator: 137 [new_demod,136] set_difference(empty_set,A)=empty_set.
% 2.22/2.42  ** KEPT (pick-wt=12): 139 [copy,138,demod,135] disjoint(A,B)|in($f11(A,B),set_difference(A,set_difference(A,B))).
% 2.22/2.42  ** KEPT (pick-wt=6): 141 [copy,140,flip.1] singleton(A)=unordered_pair(A,A).
% 2.22/2.42  ---> New Demodulator: 142 [new_demod,141] singleton(A)=unordered_pair(A,A).
% 2.22/2.42  ** KEPT (pick-wt=5): 143 [] subset(A,set_union2(A,B)).
% 2.22/2.42  ** KEPT (pick-wt=7): 145 [copy,144,demod,142] unordered_pair($c5,$c5)=unordered_pair($c4,$c3).
% 2.22/2.42  ---> New Demodulator: 146 [new_demod,145] unordered_pair($c5,$c5)=unordered_pair($c4,$c3).
% 2.22/2.42    Following clause subsumed by 94 during input processing: 0 [copy,94,flip.1] A=A.
% 2.22/2.42  94 back subsumes 91.
% 2.22/2.42  94 back subsumes 89.
% 2.22/2.42  94 back subsumes 76.
% 2.22/2.42    Following clause subsumed by 95 during input processing: 0 [copy,95,flip.1] unordered_pair(A,B)=unordered_pair(B,A).
% 2.22/2.42    Following clause subsumed by 96 during input processing: 0 [copy,96,flip.1] set_union2(A,B)=set_union2(B,A).
% 2.22/2.42  ** KEPT (pick-wt=11): 147 [copy,97,flip.1,demod,135,135] set_difference(A,set_difference(A,B))=set_difference(B,set_difference(B,A)).
% 2.22/2.42  >>>> Starting back demodulation with 109.
% 2.22/2.42      >> back demodulating 92 with 109.
% 2.22/2.42      >> back demodulating 78 with 109.
% 2.22/2.42  >>>> Starting back demodulation with 111.
% 2.22/2.42      >> back demodulating 93 with 111.
% 2.22/2.42      >> back demodulating 88 with 111.
% 2.22/2.42      >> back demodulating 84 with 111.
% 2.22/2.42      >> back demodulating 81 with 111.
% 2.22/2.42  >>>> Starting back demodulation with 116.
% 2.22/2.42  >>>> Starting back demodulation with 119.
% 2.22/2.42  >>>> Starting back demodulation with 121.
% 2.22/2.42  >>>> Starting back demodulation with 126.
% 2.22/2.42      >> back demodulating 62 with 126.
% 2.22/2.42  >>>> Starting back demodulation with 128.
% 2.22/2.42  >>>> Starting back demodulation with 132.
% 2.22/2.42  >>>> Starting back demodulation with 135.
% 2.22/2.42      >> back demodulating 120 with 135.
% 2.22/2.42      >> back demodulating 114 with 135.
% 2.22/2.42      >> back demodulating 110 with 135.
% 2.22/2.42      >> back demodulating 105 with 135.
% 2.22/2.42      >> back demodulating 104 with 135.
% 2.22/2.42      >> back demodulating 97 with 135.
% 2.22/2.42      >> back demodulating 83 with 135.
% 2.22/2.42      >> back demodulating 82 with 135.
% 2.22/2.42      >> back demodulating 63 with 135.
% 2.22/2.42      >> back demodulating 56 with 135.
% 2.22/2.42      >> back demodulating 55 with 135.
% 2.22/2.42      >> back demodulating 53 with 135.
% 2.22/2.42      >> back demodulating 35 with 135.
% 2.22/2.42      >> back demodulating 34 with 135.
% 2.22/2.42      >> back demodulating 28 with 135.
% 2.22/2.42      >> back demodulating 27 with 135.
% 5.67/5.87      >> back demodulating 26 with 135.
% 5.67/5.87      >> back demodulating 25 with 135.
% 5.67/5.87  >>>> Starting back demodulation with 137.
% 5.67/5.87  >>>> Starting back demodulation with 142.
% 5.67/5.87      >> back demodulating 118 with 142.
% 5.67/5.87      >> back demodulating 98 with 142.
% 5.67/5.87      >> back demodulating 73 with 142.
% 5.67/5.87      >> back demodulating 67 with 142.
% 5.67/5.87      >> back demodulating 49 with 142.
% 5.67/5.87      >> back demodulating 48 with 142.
% 5.67/5.87      >> back demodulating 47 with 142.
% 5.67/5.87      >> back demodulating 44 with 142.
% 5.67/5.87      >> back demodulating 43 with 142.
% 5.67/5.87      >> back demodulating 42 with 142.
% 5.67/5.87      >> back demodulating 8 with 142.
% 5.67/5.87      >> back demodulating 7 with 142.
% 5.67/5.87      >> back demodulating 6 with 142.
% 5.67/5.87  >>>> Starting back demodulation with 146.
% 5.67/5.87    Following clause subsumed by 147 during input processing: 0 [copy,147,flip.1] set_difference(A,set_difference(A,B))=set_difference(B,set_difference(B,A)).
% 5.67/5.87  >>>> Starting back demodulation with 159.
% 5.67/5.87  >>>> Starting back demodulation with 174.
% 5.67/5.87  
% 5.67/5.87  ======= end of input processing =======
% 5.67/5.87  
% 5.67/5.87  =========== start of search ===========
% 5.67/5.87  
% 5.67/5.87  
% 5.67/5.87  Resetting weight limit to 8.
% 5.67/5.87  
% 5.67/5.87  
% 5.67/5.87  Resetting weight limit to 8.
% 5.67/5.87  
% 5.67/5.87  sos_size=1306
% 5.67/5.87  
% 5.67/5.87  
% 5.67/5.87  Resetting weight limit to 7.
% 5.67/5.87  
% 5.67/5.87  
% 5.67/5.87  Resetting weight limit to 7.
% 5.67/5.87  
% 5.67/5.87  sos_size=1296
% 5.67/5.87  
% 5.67/5.87  -------- PROOF -------- 
% 5.67/5.87  
% 5.67/5.87  ----> UNIT CONFLICT at   3.46 sec ----> 2133 [binary,2132.1,74.1] $F.
% 5.67/5.87  
% 5.67/5.87  Length of proof is 13.  Level of proof is 7.
% 5.67/5.87  
% 5.67/5.87  ---------------- PROOF ----------------
% 5.67/5.87  % SZS status Theorem
% 5.67/5.87  % SZS output start Refutation
% See solution above
% 5.67/5.87  ------------ end of proof -------------
% 5.67/5.87  
% 5.67/5.87  
% 5.67/5.87  Search stopped by max_proofs option.
% 5.67/5.87  
% 5.67/5.87  
% 5.67/5.87  Search stopped by max_proofs option.
% 5.67/5.87  
% 5.67/5.87  ============ end of search ============
% 5.67/5.87  
% 5.67/5.87  -------------- statistics -------------
% 5.67/5.87  clauses given                620
% 5.67/5.87  clauses generated         199514
% 5.67/5.87  clauses kept                2073
% 5.67/5.87  clauses forward subsumed   20415
% 5.67/5.87  clauses back subsumed        261
% 5.67/5.87  Kbytes malloced             7812
% 5.67/5.87  
% 5.67/5.87  ----------- times (seconds) -----------
% 5.67/5.87  user CPU time          3.46          (0 hr, 0 min, 3 sec)
% 5.67/5.87  system CPU time        0.01          (0 hr, 0 min, 0 sec)
% 5.67/5.87  wall-clock time        5             (0 hr, 0 min, 5 sec)
% 5.67/5.87  
% 5.67/5.87  That finishes the proof of the theorem.
% 5.67/5.87  
% 5.67/5.87  Process 23663 finished Wed Jul 27 08:07:14 2022
% 5.67/5.87  Otter interrupted
% 5.67/5.87  PROOF FOUND
%------------------------------------------------------------------------------