TSTP Solution File: GEO222+2 by Otter---3.3

View Problem - Process Solution

%------------------------------------------------------------------------------
% File     : Otter---3.3
% Problem  : GEO222+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 12:54:54 EDT 2022

% Result   : Theorem 21.52s 21.69s
% Output   : Refutation 21.52s
% Verified : 
% SZS Type : Refutation
%            Derivation depth      :   10
%            Number of leaves      :   12
% Syntax   : Number of clauses     :   33 (   9 unt;  21 nHn;  11 RR)
%            Number of literals    :   78 (   0 equ;  13 neg)
%            Maximal clause size   :    6 (   2 avg)
%            Maximal term depth    :    4 (   1 avg)
%            Number of predicates  :    6 (   5 usr;   1 prp; 0-2 aty)
%            Number of functors    :    5 (   5 usr;   2 con; 0-2 aty)
%            Number of variables   :   63 (   8 sgn)

% Comments : 
%------------------------------------------------------------------------------
cnf(1,axiom,
    ~ distinct_points(A,A),
    file('GEO222+2.p',unknown),
    [] ).

cnf(3,axiom,
    ~ convergent_lines(A,A),
    file('GEO222+2.p',unknown),
    [] ).

cnf(6,axiom,
    ( ~ convergent_lines(A,B)
    | convergent_lines(A,C)
    | convergent_lines(B,C) ),
    file('GEO222+2.p',unknown),
    [] ).

cnf(9,axiom,
    ( ~ convergent_lines(A,B)
    | ~ apart_point_and_line(C,A)
    | distinct_points(C,intersection_point(A,B)) ),
    file('GEO222+2.p',unknown),
    [] ).

cnf(10,axiom,
    ( ~ convergent_lines(A,B)
    | ~ apart_point_and_line(C,B)
    | distinct_points(C,intersection_point(A,B)) ),
    file('GEO222+2.p',unknown),
    [] ).

cnf(14,axiom,
    ( ~ convergent_lines(A,B)
    | distinct_lines(A,B) ),
    file('GEO222+2.p',unknown),
    [] ).

cnf(15,axiom,
    ~ convergent_lines(parallel_through_point(A,B),A),
    file('GEO222+2.p',unknown),
    [] ).

cnf(18,axiom,
    ( ~ convergent_lines(A,B)
    | ~ unorthogonal_lines(A,B)
    | convergent_lines(A,C)
    | unorthogonal_lines(B,C) ),
    file('GEO222+2.p',unknown),
    [] ).

cnf(21,axiom,
    ~ unorthogonal_lines(orthogonal_through_point(A,B),A),
    file('GEO222+2.p',unknown),
    [] ).

cnf(23,axiom,
    ( ~ distinct_lines(A,B)
    | apart_point_and_line(C,A)
    | apart_point_and_line(C,B)
    | unorthogonal_lines(A,D)
    | unorthogonal_lines(B,D) ),
    file('GEO222+2.p',unknown),
    [] ).

cnf(24,axiom,
    ( convergent_lines(A,B)
    | unorthogonal_lines(A,B) ),
    file('GEO222+2.p',unknown),
    [] ).

cnf(25,axiom,
    convergent_lines(dollar_c1,orthogonal_through_point(orthogonal_through_point(dollar_c1,dollar_c2),dollar_c2)),
    file('GEO222+2.p',unknown),
    [] ).

cnf(26,plain,
    convergent_lines(orthogonal_through_point(A,B),A),
    inference(hyper,[status(thm)],[24,21]),
    [iquote('hyper,24,21')] ).

cnf(28,plain,
    ( convergent_lines(orthogonal_through_point(A,B),C)
    | convergent_lines(A,C) ),
    inference(hyper,[status(thm)],[26,6]),
    [iquote('hyper,26,6')] ).

cnf(31,plain,
    distinct_lines(dollar_c1,orthogonal_through_point(orthogonal_through_point(dollar_c1,dollar_c2),dollar_c2)),
    inference(hyper,[status(thm)],[25,14]),
    [iquote('hyper,25,14')] ).

cnf(32,plain,
    ( convergent_lines(dollar_c1,A)
    | convergent_lines(orthogonal_through_point(orthogonal_through_point(dollar_c1,dollar_c2),dollar_c2),A) ),
    inference(hyper,[status(thm)],[25,6]),
    [iquote('hyper,25,6')] ).

cnf(33,plain,
    ( apart_point_and_line(A,dollar_c1)
    | apart_point_and_line(A,orthogonal_through_point(orthogonal_through_point(dollar_c1,dollar_c2),dollar_c2))
    | unorthogonal_lines(dollar_c1,B)
    | unorthogonal_lines(orthogonal_through_point(orthogonal_through_point(dollar_c1,dollar_c2),dollar_c2),B) ),
    inference(hyper,[status(thm)],[31,23]),
    [iquote('hyper,31,23')] ).

cnf(36,plain,
    ( convergent_lines(A,B)
    | convergent_lines(orthogonal_through_point(A,C),D)
    | convergent_lines(B,D) ),
    inference(hyper,[status(thm)],[28,6]),
    [iquote('hyper,28,6')] ).

cnf(84,plain,
    ( convergent_lines(orthogonal_through_point(orthogonal_through_point(dollar_c1,dollar_c2),dollar_c2),A)
    | convergent_lines(dollar_c1,B)
    | convergent_lines(A,B) ),
    inference(hyper,[status(thm)],[32,6]),
    [iquote('hyper,32,6')] ).

cnf(174,plain,
    ( convergent_lines(A,B)
    | convergent_lines(B,orthogonal_through_point(A,C)) ),
    inference(hyper,[status(thm)],[36,3]),
    [iquote('hyper,36,3')] ).

cnf(235,plain,
    ( convergent_lines(A,dollar_c1)
    | convergent_lines(dollar_c1,B)
    | unorthogonal_lines(orthogonal_through_point(A,C),B)
    | apart_point_and_line(D,dollar_c1)
    | apart_point_and_line(D,orthogonal_through_point(orthogonal_through_point(dollar_c1,dollar_c2),dollar_c2))
    | unorthogonal_lines(orthogonal_through_point(orthogonal_through_point(dollar_c1,dollar_c2),dollar_c2),orthogonal_through_point(A,C)) ),
    inference(hyper,[status(thm)],[174,18,33]),
    [iquote('hyper,174,18,33')] ).

cnf(245,plain,
    ( apart_point_and_line(A,dollar_c1)
    | apart_point_and_line(A,orthogonal_through_point(orthogonal_through_point(dollar_c1,dollar_c2),dollar_c2))
    | unorthogonal_lines(orthogonal_through_point(orthogonal_through_point(dollar_c1,dollar_c2),dollar_c2),orthogonal_through_point(dollar_c1,B)) ),
    inference(unit_del,[status(thm)],[inference(factor,[status(thm)],[235]),3,21]),
    [iquote('factor,235.1.2,unit_del,3,21')] ).

cnf(3991,plain,
    ( convergent_lines(orthogonal_through_point(orthogonal_through_point(dollar_c1,dollar_c2),dollar_c2),A)
    | convergent_lines(A,dollar_c1) ),
    inference(hyper,[status(thm)],[84,3]),
    [iquote('hyper,84,3')] ).

cnf(3994,plain,
    ( convergent_lines(orthogonal_through_point(orthogonal_through_point(dollar_c1,dollar_c2),dollar_c2),A)
    | convergent_lines(dollar_c1,B)
    | convergent_lines(A,C)
    | convergent_lines(B,C) ),
    inference(hyper,[status(thm)],[84,6]),
    [iquote('hyper,84,6')] ).

cnf(3995,plain,
    ( convergent_lines(dollar_c1,A)
    | convergent_lines(A,orthogonal_through_point(orthogonal_through_point(dollar_c1,dollar_c2),dollar_c2)) ),
    inference(unit_del,[status(thm)],[inference(factor,[status(thm)],[3994]),3]),
    [iquote('factor,3994.1.3,unit_del,3')] ).

cnf(3997,plain,
    ( convergent_lines(A,dollar_c1)
    | convergent_lines(orthogonal_through_point(orthogonal_through_point(dollar_c1,dollar_c2),dollar_c2),B)
    | convergent_lines(A,B) ),
    inference(hyper,[status(thm)],[3991,6]),
    [iquote('hyper,3991,6')] ).

cnf(4006,plain,
    ( convergent_lines(A,orthogonal_through_point(orthogonal_through_point(dollar_c1,dollar_c2),dollar_c2))
    | convergent_lines(dollar_c1,B)
    | convergent_lines(A,B) ),
    inference(hyper,[status(thm)],[3995,6]),
    [iquote('hyper,3995,6')] ).

cnf(4347,plain,
    ( convergent_lines(A,dollar_c1)
    | convergent_lines(A,orthogonal_through_point(orthogonal_through_point(dollar_c1,dollar_c2),dollar_c2)) ),
    inference(hyper,[status(thm)],[3997,3]),
    [iquote('hyper,3997,3')] ).

cnf(4358,plain,
    ( convergent_lines(parallel_through_point(A,B),orthogonal_through_point(orthogonal_through_point(dollar_c1,dollar_c2),dollar_c2))
    | convergent_lines(dollar_c1,A) ),
    inference(hyper,[status(thm)],[4006,15]),
    [iquote('hyper,4006,15')] ).

cnf(4640,plain,
    ( apart_point_and_line(A,dollar_c1)
    | apart_point_and_line(A,orthogonal_through_point(orthogonal_through_point(dollar_c1,dollar_c2),dollar_c2)) ),
    inference(hyper,[status(thm)],[245,21]),
    [iquote('hyper,245,21')] ).

cnf(4648,plain,
    ( apart_point_and_line(A,dollar_c1)
    | distinct_points(A,intersection_point(dollar_c1,orthogonal_through_point(orthogonal_through_point(dollar_c1,dollar_c2),dollar_c2))) ),
    inference(unit_del,[status(thm)],[inference(hyper,[status(thm)],[4640,10,4358]),15]),
    [iquote('hyper,4640,10,4358,unit_del,15')] ).

cnf(5073,plain,
    apart_point_and_line(intersection_point(dollar_c1,orthogonal_through_point(orthogonal_through_point(dollar_c1,dollar_c2),dollar_c2)),dollar_c1),
    inference(hyper,[status(thm)],[4648,1]),
    [iquote('hyper,4648,1')] ).

cnf(5077,plain,
    $false,
    inference(unit_del,[status(thm)],[inference(hyper,[status(thm)],[5073,9,4347]),1,3]),
    [iquote('hyper,5073,9,4347,unit_del,1,3')] ).

%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.07/0.12  % Problem  : GEO222+2 : TPTP v8.1.0. Released v3.3.0.
% 0.07/0.13  % Command  : otter-tptp-script %s
% 0.13/0.33  % Computer : n026.cluster.edu
% 0.13/0.33  % Model    : x86_64 x86_64
% 0.13/0.33  % CPU      : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz
% 0.13/0.33  % Memory   : 8042.1875MB
% 0.13/0.33  % OS       : Linux 3.10.0-693.el7.x86_64
% 0.13/0.33  % CPULimit : 300
% 0.13/0.33  % WCLimit  : 300
% 0.13/0.33  % DateTime : Wed Jul 27 07:27:09 EDT 2022
% 0.13/0.34  % CPUTime  : 
% 1.94/2.14  ----- Otter 3.3f, August 2004 -----
% 1.94/2.14  The process was started by sandbox2 on n026.cluster.edu,
% 1.94/2.14  Wed Jul 27 07:27:09 2022
% 1.94/2.14  The command was "./otter".  The process ID is 20740.
% 1.94/2.14  
% 1.94/2.14  set(prolog_style_variables).
% 1.94/2.14  set(auto).
% 1.94/2.14     dependent: set(auto1).
% 1.94/2.14     dependent: set(process_input).
% 1.94/2.14     dependent: clear(print_kept).
% 1.94/2.14     dependent: clear(print_new_demod).
% 1.94/2.14     dependent: clear(print_back_demod).
% 1.94/2.14     dependent: clear(print_back_sub).
% 1.94/2.14     dependent: set(control_memory).
% 1.94/2.14     dependent: assign(max_mem, 12000).
% 1.94/2.14     dependent: assign(pick_given_ratio, 4).
% 1.94/2.14     dependent: assign(stats_level, 1).
% 1.94/2.14     dependent: assign(max_seconds, 10800).
% 1.94/2.14  clear(print_given).
% 1.94/2.14  
% 1.94/2.14  formula_list(usable).
% 1.94/2.14  all X (-distinct_points(X,X)).
% 1.94/2.14  all X (-distinct_lines(X,X)).
% 1.94/2.14  all X (-convergent_lines(X,X)).
% 1.94/2.14  all X Y Z (distinct_points(X,Y)->distinct_points(X,Z)|distinct_points(Y,Z)).
% 1.94/2.14  all X Y Z (distinct_lines(X,Y)->distinct_lines(X,Z)|distinct_lines(Y,Z)).
% 1.94/2.14  all X Y Z (convergent_lines(X,Y)->convergent_lines(X,Z)|convergent_lines(Y,Z)).
% 1.94/2.14  all X Y Z (distinct_points(X,Y)-> (apart_point_and_line(Z,line_connecting(X,Y))->distinct_points(Z,X)&distinct_points(Z,Y))).
% 1.94/2.14  all X Y Z (convergent_lines(X,Y)-> (apart_point_and_line(Z,X)|apart_point_and_line(Z,Y)->distinct_points(Z,intersection_point(X,Y)))).
% 1.94/2.14  all X Y U V (distinct_points(X,Y)&distinct_lines(U,V)->apart_point_and_line(X,U)|apart_point_and_line(X,V)|apart_point_and_line(Y,U)|apart_point_and_line(Y,V)).
% 1.94/2.14  all X Y Z (apart_point_and_line(X,Y)->distinct_points(X,Z)|apart_point_and_line(Z,Y)).
% 1.94/2.14  all X Y Z (apart_point_and_line(X,Y)->distinct_lines(Y,Z)|apart_point_and_line(X,Z)).
% 1.94/2.14  all X Y (convergent_lines(X,Y)->distinct_lines(X,Y)).
% 1.94/2.14  all X Y (-convergent_lines(parallel_through_point(Y,X),Y)).
% 1.94/2.14  all X Y (-apart_point_and_line(X,parallel_through_point(Y,X))).
% 1.94/2.14  all X Y Z (distinct_lines(Y,Z)->apart_point_and_line(X,Y)|apart_point_and_line(X,Z)|convergent_lines(Y,Z)).
% 1.94/2.14  all L M (convergent_lines(L,M)|unorthogonal_lines(L,M)).
% 1.94/2.14  all L M N (convergent_lines(L,M)&unorthogonal_lines(L,M)->convergent_lines(L,N)&unorthogonal_lines(L,N)|convergent_lines(M,N)&unorthogonal_lines(M,N)).
% 1.94/2.14  all A L (-unorthogonal_lines(orthogonal_through_point(L,A),L)).
% 1.94/2.14  all A L (-apart_point_and_line(A,orthogonal_through_point(L,A))).
% 1.94/2.14  all A L M N (distinct_lines(L,M)->apart_point_and_line(A,L)|apart_point_and_line(A,M)|unorthogonal_lines(L,N)|unorthogonal_lines(M,N)).
% 1.94/2.14  -(all A L (-convergent_lines(L,orthogonal_through_point(orthogonal_through_point(L,A),A)))).
% 1.94/2.14  end_of_list.
% 1.94/2.14  
% 1.94/2.14  -------> usable clausifies to:
% 1.94/2.14  
% 1.94/2.14  list(usable).
% 1.94/2.14  0 [] -distinct_points(X,X).
% 1.94/2.14  0 [] -distinct_lines(X,X).
% 1.94/2.14  0 [] -convergent_lines(X,X).
% 1.94/2.14  0 [] -distinct_points(X,Y)|distinct_points(X,Z)|distinct_points(Y,Z).
% 1.94/2.14  0 [] -distinct_lines(X,Y)|distinct_lines(X,Z)|distinct_lines(Y,Z).
% 1.94/2.14  0 [] -convergent_lines(X,Y)|convergent_lines(X,Z)|convergent_lines(Y,Z).
% 1.94/2.14  0 [] -distinct_points(X,Y)| -apart_point_and_line(Z,line_connecting(X,Y))|distinct_points(Z,X).
% 1.94/2.14  0 [] -distinct_points(X,Y)| -apart_point_and_line(Z,line_connecting(X,Y))|distinct_points(Z,Y).
% 1.94/2.14  0 [] -convergent_lines(X,Y)| -apart_point_and_line(Z,X)|distinct_points(Z,intersection_point(X,Y)).
% 1.94/2.14  0 [] -convergent_lines(X,Y)| -apart_point_and_line(Z,Y)|distinct_points(Z,intersection_point(X,Y)).
% 1.94/2.14  0 [] -distinct_points(X,Y)| -distinct_lines(U,V)|apart_point_and_line(X,U)|apart_point_and_line(X,V)|apart_point_and_line(Y,U)|apart_point_and_line(Y,V).
% 1.94/2.14  0 [] -apart_point_and_line(X,Y)|distinct_points(X,Z)|apart_point_and_line(Z,Y).
% 1.94/2.14  0 [] -apart_point_and_line(X,Y)|distinct_lines(Y,Z)|apart_point_and_line(X,Z).
% 1.94/2.14  0 [] -convergent_lines(X,Y)|distinct_lines(X,Y).
% 1.94/2.14  0 [] -convergent_lines(parallel_through_point(Y,X),Y).
% 1.94/2.14  0 [] -apart_point_and_line(X,parallel_through_point(Y,X)).
% 1.94/2.14  0 [] -distinct_lines(Y,Z)|apart_point_and_line(X,Y)|apart_point_and_line(X,Z)|convergent_lines(Y,Z).
% 1.94/2.14  0 [] convergent_lines(L,M)|unorthogonal_lines(L,M).
% 1.94/2.14  0 [] -convergent_lines(L,M)| -unorthogonal_lines(L,M)|convergent_lines(L,N)|convergent_lines(M,N).
% 1.94/2.14  0 [] -convergent_lines(L,M)| -unorthogonal_lines(L,M)|convergent_lines(L,N)|unorthogonal_lines(M,N).
% 1.94/2.14  0 [] -convergent_lines(L,M)| -unorthogonal_lines(L,M)|unorthogonal_lines(L,N)|convergent_lines(M,N).
% 13.53/13.70  0 [] -convergent_lines(L,M)| -unorthogonal_lines(L,M)|unorthogonal_lines(L,N)|unorthogonal_lines(M,N).
% 13.53/13.70  0 [] -unorthogonal_lines(orthogonal_through_point(L,A),L).
% 13.53/13.70  0 [] -apart_point_and_line(A,orthogonal_through_point(L,A)).
% 13.53/13.70  0 [] -distinct_lines(L,M)|apart_point_and_line(A,L)|apart_point_and_line(A,M)|unorthogonal_lines(L,N)|unorthogonal_lines(M,N).
% 13.53/13.70  0 [] convergent_lines($c1,orthogonal_through_point(orthogonal_through_point($c1,$c2),$c2)).
% 13.53/13.70  end_of_list.
% 13.53/13.70  
% 13.53/13.70  SCAN INPUT: prop=0, horn=0, equality=0, symmetry=0, max_lits=6.
% 13.53/13.70  
% 13.53/13.70  This is a non-Horn set without equality.  The strategy will
% 13.53/13.70  be ordered hyper_res, unit deletion, and factoring, with
% 13.53/13.70  satellites in sos and with nuclei in usable.
% 13.53/13.70  
% 13.53/13.70     dependent: set(hyper_res).
% 13.53/13.70     dependent: set(factor).
% 13.53/13.70     dependent: set(unit_deletion).
% 13.53/13.70  
% 13.53/13.70  ------------> process usable:
% 13.53/13.70  ** KEPT (pick-wt=3): 1 [] -distinct_points(A,A).
% 13.53/13.70  ** KEPT (pick-wt=3): 2 [] -distinct_lines(A,A).
% 13.53/13.70  ** KEPT (pick-wt=3): 3 [] -convergent_lines(A,A).
% 13.53/13.70  ** KEPT (pick-wt=9): 4 [] -distinct_points(A,B)|distinct_points(A,C)|distinct_points(B,C).
% 13.53/13.70  ** KEPT (pick-wt=9): 5 [] -distinct_lines(A,B)|distinct_lines(A,C)|distinct_lines(B,C).
% 13.53/13.70  ** KEPT (pick-wt=9): 6 [] -convergent_lines(A,B)|convergent_lines(A,C)|convergent_lines(B,C).
% 13.53/13.70  ** KEPT (pick-wt=11): 7 [] -distinct_points(A,B)| -apart_point_and_line(C,line_connecting(A,B))|distinct_points(C,A).
% 13.53/13.70  ** KEPT (pick-wt=11): 8 [] -distinct_points(A,B)| -apart_point_and_line(C,line_connecting(A,B))|distinct_points(C,B).
% 13.53/13.70  ** KEPT (pick-wt=11): 9 [] -convergent_lines(A,B)| -apart_point_and_line(C,A)|distinct_points(C,intersection_point(A,B)).
% 13.53/13.70  ** KEPT (pick-wt=11): 10 [] -convergent_lines(A,B)| -apart_point_and_line(C,B)|distinct_points(C,intersection_point(A,B)).
% 13.53/13.70  ** KEPT (pick-wt=18): 11 [] -distinct_points(A,B)| -distinct_lines(C,D)|apart_point_and_line(A,C)|apart_point_and_line(A,D)|apart_point_and_line(B,C)|apart_point_and_line(B,D).
% 13.53/13.70  ** KEPT (pick-wt=9): 12 [] -apart_point_and_line(A,B)|distinct_points(A,C)|apart_point_and_line(C,B).
% 13.53/13.70  ** KEPT (pick-wt=9): 13 [] -apart_point_and_line(A,B)|distinct_lines(B,C)|apart_point_and_line(A,C).
% 13.53/13.70  ** KEPT (pick-wt=6): 14 [] -convergent_lines(A,B)|distinct_lines(A,B).
% 13.53/13.70  ** KEPT (pick-wt=5): 15 [] -convergent_lines(parallel_through_point(A,B),A).
% 13.53/13.70  ** KEPT (pick-wt=5): 16 [] -apart_point_and_line(A,parallel_through_point(B,A)).
% 13.53/13.70  ** KEPT (pick-wt=12): 17 [] -distinct_lines(A,B)|apart_point_and_line(C,A)|apart_point_and_line(C,B)|convergent_lines(A,B).
% 13.53/13.70    Following clause subsumed by 6 during input processing: 0 [] -convergent_lines(A,B)| -unorthogonal_lines(A,B)|convergent_lines(A,C)|convergent_lines(B,C).
% 13.53/13.70  ** KEPT (pick-wt=12): 18 [] -convergent_lines(A,B)| -unorthogonal_lines(A,B)|convergent_lines(A,C)|unorthogonal_lines(B,C).
% 13.53/13.70  ** KEPT (pick-wt=12): 19 [] -convergent_lines(A,B)| -unorthogonal_lines(A,B)|unorthogonal_lines(A,C)|convergent_lines(B,C).
% 13.53/13.70  ** KEPT (pick-wt=12): 20 [] -convergent_lines(A,B)| -unorthogonal_lines(A,B)|unorthogonal_lines(A,C)|unorthogonal_lines(B,C).
% 13.53/13.70  ** KEPT (pick-wt=5): 21 [] -unorthogonal_lines(orthogonal_through_point(A,B),A).
% 13.53/13.70  ** KEPT (pick-wt=5): 22 [] -apart_point_and_line(A,orthogonal_through_point(B,A)).
% 13.53/13.70  ** KEPT (pick-wt=15): 23 [] -distinct_lines(A,B)|apart_point_and_line(C,A)|apart_point_and_line(C,B)|unorthogonal_lines(A,D)|unorthogonal_lines(B,D).
% 13.53/13.70  
% 13.53/13.70  ------------> process sos:
% 13.53/13.70  ** KEPT (pick-wt=6): 24 [] convergent_lines(A,B)|unorthogonal_lines(A,B).
% 13.53/13.70  ** KEPT (pick-wt=7): 25 [] convergent_lines($c1,orthogonal_through_point(orthogonal_through_point($c1,$c2),$c2)).
% 13.53/13.70  
% 13.53/13.70  ======= end of input processing =======
% 13.53/13.70  
% 13.53/13.70  =========== start of search ===========
% 13.53/13.70  
% 13.53/13.70  
% 13.53/13.70  Resetting weight limit to 23.
% 13.53/13.70  
% 13.53/13.70  
% 13.53/13.70  Resetting weight limit to 23.
% 13.53/13.70  
% 13.53/13.70  sos_size=3130
% 13.53/13.70  
% 13.53/13.70  
% 13.53/13.70  Resetting weight limit to 22.
% 13.53/13.70  
% 13.53/13.70  
% 13.53/13.70  Resetting weight limit to 22.
% 13.53/13.70  
% 13.53/13.70  sos_size=3155
% 13.53/13.70  
% 13.53/13.70  
% 13.53/13.70  Resetting weight limit to 20.
% 13.53/13.70  
% 13.53/13.70  
% 13.53/13.70  Resetting weight limit to 20.
% 13.53/13.70  
% 13.53/13.70  sos_size=3170
% 13.53/13.70  
% 13.53/13.70  
% 13.53/13.70  Resetting weight limit to 19.
% 13.53/13.70  
% 13.53/13.70  
% 13.53/13.70  Resetting weight limit to 19.
% 13.53/13.70  
% 13.53/13.70  sos_size=3182
% 13.53/13.70  
% 13.53/13.70  
% 13.53/13.70  Resetting weight limit to 17.
% 13.53/13.70  
% 13.53/13.70  
% 13.53/13.70  Resetting weight limit to 17.
% 13.53/13.70  
% 13.53/13.70  sos_size=3206
% 13.53/13.70  
% 13.53/13.70  
% 13.53/13.70  Resetting weight limit to 16.
% 13.53/13.70  
% 13.53/13.70  
% 13.53/13.70  Resetting weight limit to 16.
% 13.53/13.70  
% 13.53/13.70  sos_size=3221
% 13.53/13.70  
% 13.53/13.70  
% 13.53/13.70  Resetting weight limit to 15.
% 21.52/21.69  
% 21.52/21.69  
% 21.52/21.69  Resetting weight limit to 15.
% 21.52/21.69  
% 21.52/21.69  sos_size=3230
% 21.52/21.69  
% 21.52/21.69  
% 21.52/21.69  Resetting weight limit to 14.
% 21.52/21.69  
% 21.52/21.69  
% 21.52/21.69  Resetting weight limit to 14.
% 21.52/21.69  
% 21.52/21.69  sos_size=3373
% 21.52/21.69  
% 21.52/21.69  -- HEY sandbox2, WE HAVE A PROOF!! -- 
% 21.52/21.69  
% 21.52/21.69  -----> EMPTY CLAUSE at  19.55 sec ----> 5077 [hyper,5073,9,4347,unit_del,1,3] $F.
% 21.52/21.69  
% 21.52/21.69  Length of proof is 20.  Level of proof is 9.
% 21.52/21.69  
% 21.52/21.69  ---------------- PROOF ----------------
% 21.52/21.69  % SZS status Theorem
% 21.52/21.69  % SZS output start Refutation
% See solution above
% 21.52/21.69  ------------ end of proof -------------
% 21.52/21.69  
% 21.52/21.69  
% 21.52/21.69  Search stopped by max_proofs option.
% 21.52/21.69  
% 21.52/21.69  
% 21.52/21.69  Search stopped by max_proofs option.
% 21.52/21.69  
% 21.52/21.69  ============ end of search ============
% 21.52/21.69  
% 21.52/21.69  -------------- statistics -------------
% 21.52/21.69  clauses given                878
% 21.52/21.69  clauses generated         379740
% 21.52/21.69  clauses kept                5076
% 21.52/21.69  clauses forward subsumed   11967
% 21.52/21.69  clauses back subsumed        867
% 21.52/21.69  Kbytes malloced             5859
% 21.52/21.69  
% 21.52/21.69  ----------- times (seconds) -----------
% 21.52/21.69  user CPU time         19.55          (0 hr, 0 min, 19 sec)
% 21.52/21.69  system CPU time        0.01          (0 hr, 0 min, 0 sec)
% 21.52/21.69  wall-clock time       21             (0 hr, 0 min, 21 sec)
% 21.52/21.69  
% 21.52/21.69  That finishes the proof of the theorem.
% 21.52/21.69  
% 21.52/21.69  Process 20740 finished Wed Jul 27 07:27:30 2022
% 21.52/21.69  Otter interrupted
% 21.52/21.69  PROOF FOUND
%------------------------------------------------------------------------------