TSTP Solution File: SYO607+1 by Otter---3.3

View Problem - Process Solution

%------------------------------------------------------------------------------
% File     : Otter---3.3
% Problem  : SYO607+1 : TPTP v8.1.0. Released v7.0.0.
% Transfm  : none
% Format   : tptp:raw
% Command  : otter-tptp-script %s

% Computer : n003.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 13:26:24 EDT 2022

% Result   : Theorem 1.68s 1.91s
% Output   : Refutation 1.68s
% Verified : 
% SZS Type : Refutation
%            Derivation depth      :   18
%            Number of leaves      :    9
% Syntax   : Number of clauses     :   44 (   7 unt;  34 nHn;  22 RR)
%            Number of literals    :  154 (   0 equ;  18 neg)
%            Maximal clause size   :    8 (   3 avg)
%            Maximal term depth    :    3 (   1 avg)
%            Number of predicates  :    5 (   4 usr;   1 prp; 0-2 aty)
%            Number of functors    :    7 (   7 usr;   4 con; 0-1 aty)
%            Number of variables   :   64 (  43 sgn)

% Comments : 
%------------------------------------------------------------------------------
cnf(1,axiom,
    ( ~ g_false_only(a,A)
    | ~ g_false_only(A,B) ),
    file('SYO607+1.p',unknown),
    [] ).

cnf(2,axiom,
    ~ g_true_only(A,dollar_f1(A)),
    file('SYO607+1.p',unknown),
    [] ).

cnf(3,axiom,
    ( ~ g_both(a,A)
    | g_true_only(a,A)
    | g_true_only(A,B)
    | g_false_only(a,dollar_c2)
    | ~ g_both(C,D)
    | g_false_only(C,dollar_f3(C))
    | g_true_only(dollar_c3,E) ),
    file('SYO607+1.p',unknown),
    [] ).

cnf(4,axiom,
    ( ~ g_both(a,A)
    | g_true_only(a,A)
    | g_true_only(A,B)
    | g_false_only(dollar_c2,dollar_c1)
    | ~ g_both(C,D)
    | g_false_only(C,dollar_f3(C))
    | g_true_only(dollar_c3,E) ),
    file('SYO607+1.p',unknown),
    [] ).

cnf(5,axiom,
    ( ~ g_both(A,B)
    | g_false_only(A,dollar_f2(A))
    | g_true_only(a,A)
    | g_true_only(A,C)
    | g_false_only(a,dollar_c2)
    | ~ g_both(D,E)
    | g_false_only(D,dollar_f3(D))
    | g_true_only(dollar_c3,F) ),
    file('SYO607+1.p',unknown),
    [] ).

cnf(6,axiom,
    ( ~ g_both(A,B)
    | g_false_only(A,dollar_f2(A))
    | g_true_only(a,A)
    | g_true_only(A,C)
    | g_false_only(dollar_c2,dollar_c1)
    | ~ g_both(D,E)
    | g_false_only(D,dollar_f3(D))
    | g_true_only(dollar_c3,F) ),
    file('SYO607+1.p',unknown),
    [] ).

cnf(8,axiom,
    ( ~ g_true_only(A,B)
    | ~ g_false(A,B) ),
    file('SYO607+1.p',unknown),
    [] ).

cnf(11,axiom,
    ( ~ g_both(A,B)
    | g_false(A,B) ),
    file('SYO607+1.p',unknown),
    [] ).

cnf(17,plain,
    ( ~ g_both(a,A)
    | g_true_only(a,A)
    | g_true_only(A,B)
    | g_false_only(a,dollar_c2)
    | g_false_only(a,dollar_f3(a))
    | g_true_only(dollar_c3,C) ),
    inference(factor,[status(thm)],[3]),
    [iquote('factor,3.1.5')] ).

cnf(20,plain,
    ( ~ g_both(a,A)
    | g_true_only(a,A)
    | g_true_only(A,B)
    | g_false_only(dollar_c2,dollar_c1)
    | g_false_only(a,dollar_f3(a))
    | g_true_only(dollar_c3,C) ),
    inference(factor,[status(thm)],[4]),
    [iquote('factor,4.1.5')] ).

cnf(23,plain,
    ( ~ g_both(A,B)
    | g_false_only(A,dollar_f2(A))
    | g_true_only(a,A)
    | g_true_only(A,C)
    | g_false_only(a,dollar_c2)
    | g_false_only(A,dollar_f3(A))
    | g_true_only(dollar_c3,D) ),
    inference(factor,[status(thm)],[5]),
    [iquote('factor,5.1.6')] ).

cnf(26,plain,
    ( ~ g_both(A,B)
    | g_false_only(A,dollar_f2(A))
    | g_true_only(a,A)
    | g_true_only(A,C)
    | g_false_only(dollar_c2,dollar_c1)
    | g_false_only(A,dollar_f3(A))
    | g_true_only(dollar_c3,D) ),
    inference(factor,[status(thm)],[6]),
    [iquote('factor,6.1.6')] ).

cnf(37,axiom,
    ( g_true_only(A,B)
    | g_both(A,B)
    | g_false_only(A,B) ),
    file('SYO607+1.p',unknown),
    [] ).

cnf(39,plain,
    ( g_both(A,dollar_f1(A))
    | g_false_only(A,dollar_f1(A)) ),
    inference(hyper,[status(thm)],[37,2]),
    [iquote('hyper,37,2')] ).

cnf(41,plain,
    ( g_both(dollar_f1(a),dollar_f1(dollar_f1(a)))
    | g_both(a,dollar_f1(a)) ),
    inference(hyper,[status(thm)],[39,1,39]),
    [iquote('hyper,39,1,39')] ).

cnf(42,plain,
    ( g_both(a,dollar_f1(a))
    | g_false_only(dollar_f1(a),dollar_f2(dollar_f1(a)))
    | g_true_only(dollar_f1(a),A)
    | g_false_only(dollar_c2,dollar_c1)
    | g_false_only(dollar_f1(a),dollar_f3(dollar_f1(a)))
    | g_true_only(dollar_c3,B) ),
    inference(unit_del,[status(thm)],[inference(hyper,[status(thm)],[41,26]),2]),
    [iquote('hyper,41,26,unit_del,2')] ).

cnf(43,plain,
    ( g_both(a,dollar_f1(a))
    | g_false_only(dollar_f1(a),dollar_f2(dollar_f1(a)))
    | g_true_only(dollar_f1(a),A)
    | g_false_only(a,dollar_c2)
    | g_false_only(dollar_f1(a),dollar_f3(dollar_f1(a)))
    | g_true_only(dollar_c3,B) ),
    inference(unit_del,[status(thm)],[inference(hyper,[status(thm)],[41,23]),2]),
    [iquote('hyper,41,23,unit_del,2')] ).

cnf(44,plain,
    ( g_both(a,dollar_f1(a))
    | g_false(dollar_f1(a),dollar_f1(dollar_f1(a))) ),
    inference(hyper,[status(thm)],[41,11]),
    [iquote('hyper,41,11')] ).

cnf(53,plain,
    ( g_both(a,dollar_f1(a))
    | g_false_only(dollar_f1(a),dollar_f2(dollar_f1(a)))
    | g_false_only(dollar_c2,dollar_c1)
    | g_false_only(dollar_f1(a),dollar_f3(dollar_f1(a)))
    | g_true_only(dollar_c3,A) ),
    inference(hyper,[status(thm)],[42,2]),
    [iquote('hyper,42,2')] ).

cnf(57,plain,
    ( g_both(a,dollar_f1(a))
    | g_false_only(dollar_f1(a),dollar_f2(dollar_f1(a)))
    | g_false_only(a,dollar_c2)
    | g_false_only(dollar_f1(a),dollar_f3(dollar_f1(a)))
    | g_true_only(dollar_c3,A) ),
    inference(factor_simp,[status(thm)],[inference(hyper,[status(thm)],[43,8,44])]),
    [iquote('hyper,43,8,44,factor_simp')] ).

cnf(94,plain,
    ( g_both(a,dollar_f1(a))
    | g_false_only(dollar_f1(a),dollar_f2(dollar_f1(a)))
    | g_false_only(dollar_c2,dollar_c1)
    | g_false_only(dollar_f1(a),dollar_f3(dollar_f1(a))) ),
    inference(hyper,[status(thm)],[53,2]),
    [iquote('hyper,53,2')] ).

cnf(109,plain,
    ( g_both(a,dollar_f1(a))
    | g_false_only(dollar_f1(a),dollar_f2(dollar_f1(a)))
    | g_false_only(a,dollar_c2)
    | g_false_only(dollar_f1(a),dollar_f3(dollar_f1(a))) ),
    inference(hyper,[status(thm)],[57,2]),
    [iquote('hyper,57,2')] ).

cnf(111,plain,
    ( g_both(a,dollar_f1(a))
    | g_false_only(dollar_c2,dollar_c1)
    | g_false_only(dollar_f1(a),dollar_f3(dollar_f1(a))) ),
    inference(factor_simp,[status(thm)],[inference(hyper,[status(thm)],[94,1,39])]),
    [iquote('hyper,94,1,39,factor_simp')] ).

cnf(117,plain,
    ( g_both(a,dollar_f1(a))
    | g_false_only(dollar_c2,dollar_c1) ),
    inference(factor_simp,[status(thm)],[inference(hyper,[status(thm)],[111,1,39])]),
    [iquote('hyper,111,1,39,factor_simp')] ).

cnf(124,plain,
    ( g_both(a,dollar_f1(a))
    | g_false_only(a,dollar_c2)
    | g_false_only(dollar_f1(a),dollar_f3(dollar_f1(a))) ),
    inference(factor_simp,[status(thm)],[inference(hyper,[status(thm)],[109,1,39])]),
    [iquote('hyper,109,1,39,factor_simp')] ).

cnf(132,plain,
    ( g_both(a,dollar_f1(a))
    | g_false_only(a,dollar_c2) ),
    inference(factor_simp,[status(thm)],[inference(hyper,[status(thm)],[124,1,39])]),
    [iquote('hyper,124,1,39,factor_simp')] ).

cnf(134,plain,
    g_both(a,dollar_f1(a)),
    inference(factor_simp,[status(thm)],[inference(hyper,[status(thm)],[132,1,117])]),
    [iquote('hyper,132,1,117,factor_simp')] ).

cnf(143,plain,
    ( g_true_only(dollar_f1(a),A)
    | g_false_only(dollar_c2,dollar_c1)
    | g_false_only(a,dollar_f3(a))
    | g_true_only(dollar_c3,B) ),
    inference(unit_del,[status(thm)],[inference(hyper,[status(thm)],[134,20]),2]),
    [iquote('hyper,134,20,unit_del,2')] ).

cnf(144,plain,
    ( g_true_only(dollar_f1(a),A)
    | g_false_only(a,dollar_c2)
    | g_false_only(a,dollar_f3(a))
    | g_true_only(dollar_c3,B) ),
    inference(unit_del,[status(thm)],[inference(hyper,[status(thm)],[134,17]),2]),
    [iquote('hyper,134,17,unit_del,2')] ).

cnf(151,plain,
    ( g_false_only(dollar_c2,dollar_c1)
    | g_false_only(a,dollar_f3(a))
    | g_true_only(dollar_c3,A) ),
    inference(hyper,[status(thm)],[143,2]),
    [iquote('hyper,143,2')] ).

cnf(161,plain,
    ( g_false_only(dollar_c2,dollar_c1)
    | g_false_only(a,dollar_f3(a)) ),
    inference(hyper,[status(thm)],[151,2]),
    [iquote('hyper,151,2')] ).

cnf(174,plain,
    ( g_false_only(a,dollar_c2)
    | g_false_only(a,dollar_f3(a))
    | g_true_only(dollar_c3,A) ),
    inference(hyper,[status(thm)],[144,2]),
    [iquote('hyper,144,2')] ).

cnf(184,plain,
    ( g_false_only(a,dollar_c2)
    | g_false_only(a,dollar_f3(a)) ),
    inference(hyper,[status(thm)],[174,2]),
    [iquote('hyper,174,2')] ).

cnf(188,plain,
    g_false_only(a,dollar_f3(a)),
    inference(factor_simp,[status(thm)],[inference(hyper,[status(thm)],[184,1,161])]),
    [iquote('hyper,184,1,161,factor_simp')] ).

cnf(192,plain,
    g_both(dollar_f3(a),dollar_f1(dollar_f3(a))),
    inference(hyper,[status(thm)],[188,1,39]),
    [iquote('hyper,188,1,39')] ).

cnf(204,plain,
    ( g_true_only(dollar_f1(a),A)
    | g_false_only(dollar_c2,dollar_c1)
    | g_false_only(dollar_f3(a),dollar_f3(dollar_f3(a)))
    | g_true_only(dollar_c3,B) ),
    inference(unit_del,[status(thm)],[inference(hyper,[status(thm)],[192,4,134]),2]),
    [iquote('hyper,192,4,134,unit_del,2')] ).

cnf(205,plain,
    ( g_true_only(dollar_f1(a),A)
    | g_false_only(a,dollar_c2)
    | g_false_only(dollar_f3(a),dollar_f3(dollar_f3(a)))
    | g_true_only(dollar_c3,B) ),
    inference(unit_del,[status(thm)],[inference(hyper,[status(thm)],[192,3,134]),2]),
    [iquote('hyper,192,3,134,unit_del,2')] ).

cnf(208,plain,
    ( g_false_only(dollar_c2,dollar_c1)
    | g_false_only(dollar_f3(a),dollar_f3(dollar_f3(a)))
    | g_true_only(dollar_c3,A) ),
    inference(hyper,[status(thm)],[204,2]),
    [iquote('hyper,204,2')] ).

cnf(215,plain,
    ( g_false_only(dollar_c2,dollar_c1)
    | g_false_only(dollar_f3(a),dollar_f3(dollar_f3(a))) ),
    inference(hyper,[status(thm)],[208,2]),
    [iquote('hyper,208,2')] ).

cnf(218,plain,
    g_false_only(dollar_c2,dollar_c1),
    inference(hyper,[status(thm)],[215,1,188]),
    [iquote('hyper,215,1,188')] ).

cnf(225,plain,
    ( g_false_only(a,dollar_c2)
    | g_false_only(dollar_f3(a),dollar_f3(dollar_f3(a)))
    | g_true_only(dollar_c3,A) ),
    inference(hyper,[status(thm)],[205,2]),
    [iquote('hyper,205,2')] ).

cnf(231,plain,
    ( g_false_only(a,dollar_c2)
    | g_false_only(dollar_f3(a),dollar_f3(dollar_f3(a))) ),
    inference(hyper,[status(thm)],[225,2]),
    [iquote('hyper,225,2')] ).

cnf(235,plain,
    g_false_only(a,dollar_c2),
    inference(hyper,[status(thm)],[231,1,188]),
    [iquote('hyper,231,1,188')] ).

cnf(237,plain,
    $false,
    inference(hyper,[status(thm)],[235,1,218]),
    [iquote('hyper,235,1,218')] ).

%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.03/0.11  % Problem  : SYO607+1 : TPTP v8.1.0. Released v7.0.0.
% 0.03/0.12  % Command  : otter-tptp-script %s
% 0.12/0.33  % Computer : n003.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 10:09:11 EDT 2022
% 0.12/0.33  % CPUTime  : 
% 1.68/1.89  ----- Otter 3.3f, August 2004 -----
% 1.68/1.89  The process was started by sandbox2 on n003.cluster.edu,
% 1.68/1.89  Wed Jul 27 10:09:11 2022
% 1.68/1.89  The command was "./otter".  The process ID is 14038.
% 1.68/1.89  
% 1.68/1.89  set(prolog_style_variables).
% 1.68/1.89  set(auto).
% 1.68/1.89     dependent: set(auto1).
% 1.68/1.89     dependent: set(process_input).
% 1.68/1.89     dependent: clear(print_kept).
% 1.68/1.89     dependent: clear(print_new_demod).
% 1.68/1.89     dependent: clear(print_back_demod).
% 1.68/1.89     dependent: clear(print_back_sub).
% 1.68/1.89     dependent: set(control_memory).
% 1.68/1.89     dependent: assign(max_mem, 12000).
% 1.68/1.89     dependent: assign(pick_given_ratio, 4).
% 1.68/1.89     dependent: assign(stats_level, 1).
% 1.68/1.89     dependent: assign(max_seconds, 10800).
% 1.68/1.89  clear(print_given).
% 1.68/1.89  
% 1.68/1.89  formula_list(usable).
% 1.68/1.89  -((exists A (g_false_only(a,A)& (exists B g_false_only(A,B))))| (exists A all B g_true_only(A,B))| (exists A ((g_both(a,A)| (exists B g_both(A,B))& -(exists B g_false_only(A,B)))& -g_true_only(a,A)& -(all B g_true_only(A,B))))& -(exists A (g_false_only(a,A)& (exists B g_false_only(A,B))))& (exists A ((exists B g_both(A,B))& -(exists B g_false_only(A,B))))& -(exists A all B g_true_only(A,B))).
% 1.68/1.89  all X_2 X_1 (g_true_only(X_2,X_1)<->g_true(X_2,X_1)& -g_false(X_2,X_1)).
% 1.68/1.89  all X_2 X_1 (g_both(X_2,X_1)<->g_true(X_2,X_1)&g_false(X_2,X_1)).
% 1.68/1.89  all X_2 X_1 (g_false_only(X_2,X_1)<->g_false(X_2,X_1)& -g_true(X_2,X_1)).
% 1.68/1.89  all X_2 X_1 (g_true_only(X_2,X_1)|g_both(X_2,X_1)|g_false_only(X_2,X_1)).
% 1.68/1.89  end_of_list.
% 1.68/1.89  
% 1.68/1.89  -------> usable clausifies to:
% 1.68/1.89  
% 1.68/1.89  list(usable).
% 1.68/1.89  0 [] -g_false_only(a,A)| -g_false_only(A,B).
% 1.68/1.89  0 [] -g_true_only(X1,$f1(X1)).
% 1.68/1.89  0 [] -g_both(a,X2)|g_true_only(a,X2)|g_true_only(X2,X4)|g_false_only(a,$c2)| -g_both(X5,X6)|g_false_only(X5,$f3(X5))|g_true_only($c3,X7).
% 1.68/1.89  0 [] -g_both(a,X2)|g_true_only(a,X2)|g_true_only(X2,X4)|g_false_only($c2,$c1)| -g_both(X5,X6)|g_false_only(X5,$f3(X5))|g_true_only($c3,X7).
% 1.68/1.89  0 [] -g_both(X2,X3)|g_false_only(X2,$f2(X2))|g_true_only(a,X2)|g_true_only(X2,X4)|g_false_only(a,$c2)| -g_both(X5,X6)|g_false_only(X5,$f3(X5))|g_true_only($c3,X7).
% 1.68/1.89  0 [] -g_both(X2,X3)|g_false_only(X2,$f2(X2))|g_true_only(a,X2)|g_true_only(X2,X4)|g_false_only($c2,$c1)| -g_both(X5,X6)|g_false_only(X5,$f3(X5))|g_true_only($c3,X7).
% 1.68/1.89  0 [] -g_true_only(X_2,X_1)|g_true(X_2,X_1).
% 1.68/1.89  0 [] -g_true_only(X_2,X_1)| -g_false(X_2,X_1).
% 1.68/1.89  0 [] g_true_only(X_2,X_1)| -g_true(X_2,X_1)|g_false(X_2,X_1).
% 1.68/1.89  0 [] -g_both(X_2,X_1)|g_true(X_2,X_1).
% 1.68/1.89  0 [] -g_both(X_2,X_1)|g_false(X_2,X_1).
% 1.68/1.89  0 [] g_both(X_2,X_1)| -g_true(X_2,X_1)| -g_false(X_2,X_1).
% 1.68/1.89  0 [] -g_false_only(X_2,X_1)|g_false(X_2,X_1).
% 1.68/1.89  0 [] -g_false_only(X_2,X_1)| -g_true(X_2,X_1).
% 1.68/1.89  0 [] g_false_only(X_2,X_1)| -g_false(X_2,X_1)|g_true(X_2,X_1).
% 1.68/1.89  0 [] g_true_only(X_2,X_1)|g_both(X_2,X_1)|g_false_only(X_2,X_1).
% 1.68/1.89  end_of_list.
% 1.68/1.89  
% 1.68/1.89  SCAN INPUT: prop=0, horn=0, equality=0, symmetry=0, max_lits=8.
% 1.68/1.89  
% 1.68/1.89  This is a non-Horn set without equality.  The strategy will
% 1.68/1.89  be ordered hyper_res, unit deletion, and factoring, with
% 1.68/1.89  satellites in sos and with nuclei in usable.
% 1.68/1.89  
% 1.68/1.89     dependent: set(hyper_res).
% 1.68/1.89     dependent: set(factor).
% 1.68/1.89     dependent: set(unit_deletion).
% 1.68/1.89  
% 1.68/1.89  ------------> process usable:
% 1.68/1.89  ** KEPT (pick-wt=6): 1 [] -g_false_only(a,A)| -g_false_only(A,B).
% 1.68/1.89  ** KEPT (pick-wt=4): 2 [] -g_true_only(A,$f1(A)).
% 1.68/1.89  ** KEPT (pick-wt=22): 3 [] -g_both(a,A)|g_true_only(a,A)|g_true_only(A,B)|g_false_only(a,$c2)| -g_both(C,D)|g_false_only(C,$f3(C))|g_true_only($c3,E).
% 1.68/1.89  ** KEPT (pick-wt=22): 4 [] -g_both(a,A)|g_true_only(a,A)|g_true_only(A,B)|g_false_only($c2,$c1)| -g_both(C,D)|g_false_only(C,$f3(C))|g_true_only($c3,E).
% 1.68/1.89  ** KEPT (pick-wt=26): 5 [] -g_both(A,B)|g_false_only(A,$f2(A))|g_true_only(a,A)|g_true_only(A,C)|g_false_only(a,$c2)| -g_both(D,E)|g_false_only(D,$f3(D))|g_true_only($c3,F).
% 1.68/1.89  ** KEPT (pick-wt=26): 6 [] -g_both(A,B)|g_false_only(A,$f2(A))|g_true_only(a,A)|g_true_only(A,C)|g_false_only($c2,$c1)| -g_both(D,E)|g_false_only(D,$f3(D))|g_true_only($c3,F).
% 1.68/1.89  ** KEPT (pick-wt=6): 7 [] -g_true_only(A,B)|g_true(A,B).
% 1.68/1.89  ** KEPT (pick-wt=6): 8 [] -g_true_only(A,B)| -g_false(A,B).
% 1.68/1.89  ** KEPT (pick-wt=9): 9 [] g_true_only(A,B)| -g_true(A,B)|g_false(A,B).
% 1.68/1.89  ** KEPT (pick-wt=6): 10 [] -g_both(A,B)|g_true(A,B).
% 1.68/1.89  ** KEPT (pick-wt=6): 11 [] -g_both(A,B)|g_false(A,B).
% 1.68/1.89  ** KEPT (pick-wt=9): 12 [] g_both(A,B)| -g_true(A,B)| -g_false(A,B).
% 1.68/1.89  ** KEPT (pick-wt=6): 13 [] -g_false_only(A,B)|g_false(A,B).
% 1.68/1.91  ** KEPT (pick-wt=6): 14 [] -g_false_only(A,B)| -g_true(A,B).
% 1.68/1.91  ** KEPT (pick-wt=9): 15 [] g_false_only(A,B)| -g_false(A,B)|g_true(A,B).
% 1.68/1.91  
% 1.68/1.91  ------------> process sos:
% 1.68/1.91  ** KEPT (pick-wt=9): 37 [] g_true_only(A,B)|g_both(A,B)|g_false_only(A,B).
% 1.68/1.91  
% 1.68/1.91  ======= end of input processing =======
% 1.68/1.91  
% 1.68/1.91  =========== start of search ===========
% 1.68/1.91  
% 1.68/1.91  -------- PROOF -------- 
% 1.68/1.91  
% 1.68/1.91  -----> EMPTY CLAUSE at   0.01 sec ----> 237 [hyper,235,1,218] $F.
% 1.68/1.91  
% 1.68/1.91  Length of proof is 34.  Level of proof is 17.
% 1.68/1.91  
% 1.68/1.91  ---------------- PROOF ----------------
% 1.68/1.91  % SZS status Theorem
% 1.68/1.91  % SZS output start Refutation
% See solution above
% 1.68/1.91  ------------ end of proof -------------
% 1.68/1.91  
% 1.68/1.91  
% 1.68/1.91  Search stopped by max_proofs option.
% 1.68/1.91  
% 1.68/1.91  
% 1.68/1.91  Search stopped by max_proofs option.
% 1.68/1.91  
% 1.68/1.91  ============ end of search ============
% 1.68/1.91  
% 1.68/1.91  -------------- statistics -------------
% 1.68/1.91  clauses given                 75
% 1.68/1.91  clauses generated            484
% 1.68/1.91  clauses kept                 236
% 1.68/1.91  clauses forward subsumed     263
% 1.68/1.91  clauses back subsumed        207
% 1.68/1.91  Kbytes malloced              976
% 1.68/1.91  
% 1.68/1.91  ----------- times (seconds) -----------
% 1.68/1.91  user CPU time          0.02          (0 hr, 0 min, 0 sec)
% 1.68/1.91  system CPU time        0.00          (0 hr, 0 min, 0 sec)
% 1.68/1.91  wall-clock time        2             (0 hr, 0 min, 2 sec)
% 1.68/1.91  
% 1.68/1.91  That finishes the proof of the theorem.
% 1.68/1.91  
% 1.68/1.91  Process 14038 finished Wed Jul 27 10:09:13 2022
% 1.68/1.91  Otter interrupted
% 1.68/1.91  PROOF FOUND
%------------------------------------------------------------------------------