TSTP Solution File: SEU244+1 by Otter---3.3

View Problem - Process Solution

%------------------------------------------------------------------------------
% File     : Otter---3.3
% Problem  : SEU244+1 : TPTP v8.1.0. Released v3.3.0.
% Transfm  : none
% Format   : tptp:raw
% Command  : otter-tptp-script %s

% Computer : n014.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 13:15:19 EDT 2022

% Result   : Theorem 1.69s 1.91s
% Output   : Refutation 1.69s
% Verified : 
% SZS Type : Refutation
%            Derivation depth      :    6
%            Number of leaves      :   25
% Syntax   : Number of clauses     :   48 (  14 unt;  11 nHn;  48 RR)
%            Number of literals    :  112 (   0 equ;  54 neg)
%            Maximal clause size   :    7 (   2 avg)
%            Maximal term depth    :    2 (   1 avg)
%            Number of predicates  :   14 (  13 usr;   1 prp; 0-2 aty)
%            Number of functors    :    2 (   2 usr;   1 con; 0-1 aty)
%            Number of variables   :   28 (   0 sgn)

% Comments : 
%------------------------------------------------------------------------------
cnf(1,axiom,
    ( ~ relation(A)
    | ~ antisymmetric(A)
    | is_antisymmetric_in(A,relation_field(A)) ),
    file('SEU244+1.p',unknown),
    [] ).

cnf(2,axiom,
    ( ~ relation(A)
    | antisymmetric(A)
    | ~ is_antisymmetric_in(A,relation_field(A)) ),
    file('SEU244+1.p',unknown),
    [] ).

cnf(3,axiom,
    ( ~ relation(A)
    | ~ connected(A)
    | is_connected_in(A,relation_field(A)) ),
    file('SEU244+1.p',unknown),
    [] ).

cnf(4,axiom,
    ( ~ relation(A)
    | connected(A)
    | ~ is_connected_in(A,relation_field(A)) ),
    file('SEU244+1.p',unknown),
    [] ).

cnf(5,axiom,
    ( ~ relation(A)
    | ~ transitive(A)
    | is_transitive_in(A,relation_field(A)) ),
    file('SEU244+1.p',unknown),
    [] ).

cnf(6,axiom,
    ( ~ relation(A)
    | transitive(A)
    | ~ is_transitive_in(A,relation_field(A)) ),
    file('SEU244+1.p',unknown),
    [] ).

cnf(7,axiom,
    ( ~ relation(A)
    | ~ well_ordering(A)
    | reflexive(A) ),
    file('SEU244+1.p',unknown),
    [] ).

cnf(8,axiom,
    ( ~ relation(A)
    | ~ well_ordering(A)
    | transitive(A) ),
    file('SEU244+1.p',unknown),
    [] ).

cnf(9,axiom,
    ( ~ relation(A)
    | ~ well_ordering(A)
    | antisymmetric(A) ),
    file('SEU244+1.p',unknown),
    [] ).

cnf(10,axiom,
    ( ~ relation(A)
    | ~ well_ordering(A)
    | connected(A) ),
    file('SEU244+1.p',unknown),
    [] ).

cnf(11,axiom,
    ( ~ relation(A)
    | ~ well_ordering(A)
    | well_founded_relation(A) ),
    file('SEU244+1.p',unknown),
    [] ).

cnf(12,axiom,
    ( ~ relation(A)
    | well_ordering(A)
    | ~ reflexive(A)
    | ~ transitive(A)
    | ~ antisymmetric(A)
    | ~ connected(A)
    | ~ well_founded_relation(A) ),
    file('SEU244+1.p',unknown),
    [] ).

cnf(13,axiom,
    ( ~ relation(A)
    | ~ well_orders(A,B)
    | is_reflexive_in(A,B) ),
    file('SEU244+1.p',unknown),
    [] ).

cnf(14,axiom,
    ( ~ relation(A)
    | ~ well_orders(A,B)
    | is_transitive_in(A,B) ),
    file('SEU244+1.p',unknown),
    [] ).

cnf(15,axiom,
    ( ~ relation(A)
    | ~ well_orders(A,B)
    | is_antisymmetric_in(A,B) ),
    file('SEU244+1.p',unknown),
    [] ).

cnf(16,axiom,
    ( ~ relation(A)
    | ~ well_orders(A,B)
    | is_connected_in(A,B) ),
    file('SEU244+1.p',unknown),
    [] ).

cnf(17,axiom,
    ( ~ relation(A)
    | ~ well_orders(A,B)
    | is_well_founded_in(A,B) ),
    file('SEU244+1.p',unknown),
    [] ).

cnf(18,axiom,
    ( ~ relation(A)
    | well_orders(A,B)
    | ~ is_reflexive_in(A,B)
    | ~ is_transitive_in(A,B)
    | ~ is_antisymmetric_in(A,B)
    | ~ is_connected_in(A,B)
    | ~ is_well_founded_in(A,B) ),
    file('SEU244+1.p',unknown),
    [] ).

cnf(21,axiom,
    ( ~ relation(A)
    | ~ reflexive(A)
    | is_reflexive_in(A,relation_field(A)) ),
    file('SEU244+1.p',unknown),
    [] ).

cnf(22,axiom,
    ( ~ relation(A)
    | reflexive(A)
    | ~ is_reflexive_in(A,relation_field(A)) ),
    file('SEU244+1.p',unknown),
    [] ).

cnf(23,axiom,
    ( ~ relation(A)
    | ~ well_founded_relation(A)
    | is_well_founded_in(A,relation_field(A)) ),
    file('SEU244+1.p',unknown),
    [] ).

cnf(24,axiom,
    ( ~ relation(A)
    | well_founded_relation(A)
    | ~ is_well_founded_in(A,relation_field(A)) ),
    file('SEU244+1.p',unknown),
    [] ).

cnf(25,axiom,
    ( ~ well_orders(dollar_c1,relation_field(dollar_c1))
    | ~ well_ordering(dollar_c1) ),
    file('SEU244+1.p',unknown),
    [] ).

cnf(30,axiom,
    relation(dollar_c1),
    file('SEU244+1.p',unknown),
    [] ).

cnf(31,axiom,
    ( well_orders(dollar_c1,relation_field(dollar_c1))
    | well_ordering(dollar_c1) ),
    file('SEU244+1.p',unknown),
    [] ).

cnf(34,plain,
    ( well_orders(dollar_c1,relation_field(dollar_c1))
    | well_founded_relation(dollar_c1) ),
    inference(hyper,[status(thm)],[31,11,30]),
    [iquote('hyper,31,11,30')] ).

cnf(35,plain,
    ( well_orders(dollar_c1,relation_field(dollar_c1))
    | connected(dollar_c1) ),
    inference(hyper,[status(thm)],[31,10,30]),
    [iquote('hyper,31,10,30')] ).

cnf(36,plain,
    ( well_orders(dollar_c1,relation_field(dollar_c1))
    | antisymmetric(dollar_c1) ),
    inference(hyper,[status(thm)],[31,9,30]),
    [iquote('hyper,31,9,30')] ).

cnf(37,plain,
    ( well_orders(dollar_c1,relation_field(dollar_c1))
    | transitive(dollar_c1) ),
    inference(hyper,[status(thm)],[31,8,30]),
    [iquote('hyper,31,8,30')] ).

cnf(38,plain,
    ( well_orders(dollar_c1,relation_field(dollar_c1))
    | reflexive(dollar_c1) ),
    inference(hyper,[status(thm)],[31,7,30]),
    [iquote('hyper,31,7,30')] ).

cnf(39,plain,
    ( well_orders(dollar_c1,relation_field(dollar_c1))
    | is_well_founded_in(dollar_c1,relation_field(dollar_c1)) ),
    inference(hyper,[status(thm)],[34,23,30]),
    [iquote('hyper,34,23,30')] ).

cnf(41,plain,
    ( well_orders(dollar_c1,relation_field(dollar_c1))
    | is_connected_in(dollar_c1,relation_field(dollar_c1)) ),
    inference(hyper,[status(thm)],[35,3,30]),
    [iquote('hyper,35,3,30')] ).

cnf(42,plain,
    ( well_orders(dollar_c1,relation_field(dollar_c1))
    | is_antisymmetric_in(dollar_c1,relation_field(dollar_c1)) ),
    inference(hyper,[status(thm)],[36,1,30]),
    [iquote('hyper,36,1,30')] ).

cnf(43,plain,
    ( well_orders(dollar_c1,relation_field(dollar_c1))
    | is_transitive_in(dollar_c1,relation_field(dollar_c1)) ),
    inference(hyper,[status(thm)],[37,5,30]),
    [iquote('hyper,37,5,30')] ).

cnf(44,plain,
    ( well_orders(dollar_c1,relation_field(dollar_c1))
    | is_reflexive_in(dollar_c1,relation_field(dollar_c1)) ),
    inference(hyper,[status(thm)],[38,21,30]),
    [iquote('hyper,38,21,30')] ).

cnf(47,plain,
    is_well_founded_in(dollar_c1,relation_field(dollar_c1)),
    inference(factor_simp,[status(thm)],[inference(hyper,[status(thm)],[39,17,30])]),
    [iquote('hyper,39,17,30,factor_simp')] ).

cnf(48,plain,
    well_founded_relation(dollar_c1),
    inference(hyper,[status(thm)],[47,24,30]),
    [iquote('hyper,47,24,30')] ).

cnf(49,plain,
    is_connected_in(dollar_c1,relation_field(dollar_c1)),
    inference(factor_simp,[status(thm)],[inference(hyper,[status(thm)],[41,16,30])]),
    [iquote('hyper,41,16,30,factor_simp')] ).

cnf(50,plain,
    connected(dollar_c1),
    inference(hyper,[status(thm)],[49,4,30]),
    [iquote('hyper,49,4,30')] ).

cnf(51,plain,
    is_antisymmetric_in(dollar_c1,relation_field(dollar_c1)),
    inference(factor_simp,[status(thm)],[inference(hyper,[status(thm)],[42,15,30])]),
    [iquote('hyper,42,15,30,factor_simp')] ).

cnf(52,plain,
    antisymmetric(dollar_c1),
    inference(hyper,[status(thm)],[51,2,30]),
    [iquote('hyper,51,2,30')] ).

cnf(53,plain,
    is_transitive_in(dollar_c1,relation_field(dollar_c1)),
    inference(factor_simp,[status(thm)],[inference(hyper,[status(thm)],[43,14,30])]),
    [iquote('hyper,43,14,30,factor_simp')] ).

cnf(54,plain,
    transitive(dollar_c1),
    inference(hyper,[status(thm)],[53,6,30]),
    [iquote('hyper,53,6,30')] ).

cnf(55,plain,
    is_reflexive_in(dollar_c1,relation_field(dollar_c1)),
    inference(factor_simp,[status(thm)],[inference(hyper,[status(thm)],[44,13,30])]),
    [iquote('hyper,44,13,30,factor_simp')] ).

cnf(56,plain,
    reflexive(dollar_c1),
    inference(hyper,[status(thm)],[55,22,30]),
    [iquote('hyper,55,22,30')] ).

cnf(57,plain,
    well_orders(dollar_c1,relation_field(dollar_c1)),
    inference(hyper,[status(thm)],[55,18,30,53,51,49,47]),
    [iquote('hyper,55,18,30,53,51,49,47')] ).

cnf(58,plain,
    well_ordering(dollar_c1),
    inference(hyper,[status(thm)],[56,12,30,54,52,50,48]),
    [iquote('hyper,56,12,30,54,52,50,48')] ).

cnf(59,plain,
    $false,
    inference(hyper,[status(thm)],[57,25,58]),
    [iquote('hyper,57,25,58')] ).

%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.03/0.12  % Problem  : SEU244+1 : TPTP v8.1.0. Released v3.3.0.
% 0.03/0.12  % Command  : otter-tptp-script %s
% 0.12/0.33  % Computer : n014.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 08:02:24 EDT 2022
% 0.12/0.33  % CPUTime  : 
% 1.69/1.90  ----- Otter 3.3f, August 2004 -----
% 1.69/1.90  The process was started by sandbox2 on n014.cluster.edu,
% 1.69/1.90  Wed Jul 27 08:02:24 2022
% 1.69/1.90  The command was "./otter".  The process ID is 3409.
% 1.69/1.90  
% 1.69/1.90  set(prolog_style_variables).
% 1.69/1.90  set(auto).
% 1.69/1.90     dependent: set(auto1).
% 1.69/1.90     dependent: set(process_input).
% 1.69/1.90     dependent: clear(print_kept).
% 1.69/1.90     dependent: clear(print_new_demod).
% 1.69/1.90     dependent: clear(print_back_demod).
% 1.69/1.90     dependent: clear(print_back_sub).
% 1.69/1.90     dependent: set(control_memory).
% 1.69/1.90     dependent: assign(max_mem, 12000).
% 1.69/1.90     dependent: assign(pick_given_ratio, 4).
% 1.69/1.90     dependent: assign(stats_level, 1).
% 1.69/1.90     dependent: assign(max_seconds, 10800).
% 1.69/1.90  clear(print_given).
% 1.69/1.90  
% 1.69/1.90  formula_list(usable).
% 1.69/1.90  all A (A=A).
% 1.69/1.90  all A B (set_union2(A,B)=set_union2(B,A)).
% 1.69/1.90  all A (relation(A)-> (antisymmetric(A)<->is_antisymmetric_in(A,relation_field(A)))).
% 1.69/1.90  all A (relation(A)-> (connected(A)<->is_connected_in(A,relation_field(A)))).
% 1.69/1.90  all A (relation(A)-> (transitive(A)<->is_transitive_in(A,relation_field(A)))).
% 1.69/1.90  all A (relation(A)-> (well_ordering(A)<->reflexive(A)&transitive(A)&antisymmetric(A)&connected(A)&well_founded_relation(A))).
% 1.69/1.90  all A (relation(A)-> (all B (well_orders(A,B)<->is_reflexive_in(A,B)&is_transitive_in(A,B)&is_antisymmetric_in(A,B)&is_connected_in(A,B)&is_well_founded_in(A,B)))).
% 1.69/1.90  all A (relation(A)->relation_field(A)=set_union2(relation_dom(A),relation_rng(A))).
% 1.69/1.90  all A (relation(A)-> (reflexive(A)<->is_reflexive_in(A,relation_field(A)))).
% 1.69/1.90  $T.
% 1.69/1.90  $T.
% 1.69/1.90  $T.
% 1.69/1.90  $T.
% 1.69/1.90  all A B (set_union2(A,A)=A).
% 1.69/1.90  all A (relation(A)-> (well_founded_relation(A)<->is_well_founded_in(A,relation_field(A)))).
% 1.69/1.90  -(all A (relation(A)-> (well_orders(A,relation_field(A))<->well_ordering(A)))).
% 1.69/1.90  end_of_list.
% 1.69/1.90  
% 1.69/1.90  -------> usable clausifies to:
% 1.69/1.90  
% 1.69/1.90  list(usable).
% 1.69/1.90  0 [] A=A.
% 1.69/1.90  0 [] set_union2(A,B)=set_union2(B,A).
% 1.69/1.90  0 [] -relation(A)| -antisymmetric(A)|is_antisymmetric_in(A,relation_field(A)).
% 1.69/1.90  0 [] -relation(A)|antisymmetric(A)| -is_antisymmetric_in(A,relation_field(A)).
% 1.69/1.90  0 [] -relation(A)| -connected(A)|is_connected_in(A,relation_field(A)).
% 1.69/1.90  0 [] -relation(A)|connected(A)| -is_connected_in(A,relation_field(A)).
% 1.69/1.90  0 [] -relation(A)| -transitive(A)|is_transitive_in(A,relation_field(A)).
% 1.69/1.90  0 [] -relation(A)|transitive(A)| -is_transitive_in(A,relation_field(A)).
% 1.69/1.90  0 [] -relation(A)| -well_ordering(A)|reflexive(A).
% 1.69/1.90  0 [] -relation(A)| -well_ordering(A)|transitive(A).
% 1.69/1.90  0 [] -relation(A)| -well_ordering(A)|antisymmetric(A).
% 1.69/1.90  0 [] -relation(A)| -well_ordering(A)|connected(A).
% 1.69/1.90  0 [] -relation(A)| -well_ordering(A)|well_founded_relation(A).
% 1.69/1.90  0 [] -relation(A)|well_ordering(A)| -reflexive(A)| -transitive(A)| -antisymmetric(A)| -connected(A)| -well_founded_relation(A).
% 1.69/1.90  0 [] -relation(A)| -well_orders(A,B)|is_reflexive_in(A,B).
% 1.69/1.90  0 [] -relation(A)| -well_orders(A,B)|is_transitive_in(A,B).
% 1.69/1.90  0 [] -relation(A)| -well_orders(A,B)|is_antisymmetric_in(A,B).
% 1.69/1.90  0 [] -relation(A)| -well_orders(A,B)|is_connected_in(A,B).
% 1.69/1.90  0 [] -relation(A)| -well_orders(A,B)|is_well_founded_in(A,B).
% 1.69/1.90  0 [] -relation(A)|well_orders(A,B)| -is_reflexive_in(A,B)| -is_transitive_in(A,B)| -is_antisymmetric_in(A,B)| -is_connected_in(A,B)| -is_well_founded_in(A,B).
% 1.69/1.90  0 [] -relation(A)|relation_field(A)=set_union2(relation_dom(A),relation_rng(A)).
% 1.69/1.90  0 [] -relation(A)| -reflexive(A)|is_reflexive_in(A,relation_field(A)).
% 1.69/1.90  0 [] -relation(A)|reflexive(A)| -is_reflexive_in(A,relation_field(A)).
% 1.69/1.90  0 [] $T.
% 1.69/1.90  0 [] $T.
% 1.69/1.90  0 [] $T.
% 1.69/1.90  0 [] $T.
% 1.69/1.90  0 [] set_union2(A,A)=A.
% 1.69/1.90  0 [] -relation(A)| -well_founded_relation(A)|is_well_founded_in(A,relation_field(A)).
% 1.69/1.90  0 [] -relation(A)|well_founded_relation(A)| -is_well_founded_in(A,relation_field(A)).
% 1.69/1.90  0 [] relation($c1).
% 1.69/1.90  0 [] well_orders($c1,relation_field($c1))|well_ordering($c1).
% 1.69/1.90  0 [] -well_orders($c1,relation_field($c1))| -well_ordering($c1).
% 1.69/1.90  end_of_list.
% 1.69/1.90  
% 1.69/1.90  SCAN INPUT: prop=0, horn=0, equality=1, symmetry=0, max_lits=7.
% 1.69/1.90  
% 1.69/1.90  This ia a non-Horn set with equality.  The strategy will be
% 1.69/1.90  Knuth-Bendix, ordered hyper_res, factoring, and unit
% 1.69/1.90  deletion, with positive clauses in sos and nonpositive
% 1.69/1.90  clauses in usable.
% 1.69/1.90  
% 1.69/1.90     dependent: set(knuth_bendix).
% 1.69/1.90     dependent: set(anl_eq).
% 1.69/1.90     dependent: set(para_from).
% 1.69/1.90     dependent: set(para_into).
% 1.69/1.90     dependent: clear(para_from_right).
% 1.69/1.90     dependent: clear(para_into_right).
% 1.69/1.91     dependent: set(para_from_vars).
% 1.69/1.91     dependent: set(eq_units_both_ways).
% 1.69/1.91     dependent: set(dynamic_demod_all).
% 1.69/1.91     dependent: set(dynamic_demod).
% 1.69/1.91     dependent: set(order_eq).
% 1.69/1.91     dependent: set(back_demod).
% 1.69/1.91     dependent: set(lrpo).
% 1.69/1.91     dependent: set(hyper_res).
% 1.69/1.91     dependent: set(unit_deletion).
% 1.69/1.91     dependent: set(factor).
% 1.69/1.91  
% 1.69/1.91  ------------> process usable:
% 1.69/1.91  ** KEPT (pick-wt=8): 1 [] -relation(A)| -antisymmetric(A)|is_antisymmetric_in(A,relation_field(A)).
% 1.69/1.91  ** KEPT (pick-wt=8): 2 [] -relation(A)|antisymmetric(A)| -is_antisymmetric_in(A,relation_field(A)).
% 1.69/1.91  ** KEPT (pick-wt=8): 3 [] -relation(A)| -connected(A)|is_connected_in(A,relation_field(A)).
% 1.69/1.91  ** KEPT (pick-wt=8): 4 [] -relation(A)|connected(A)| -is_connected_in(A,relation_field(A)).
% 1.69/1.91  ** KEPT (pick-wt=8): 5 [] -relation(A)| -transitive(A)|is_transitive_in(A,relation_field(A)).
% 1.69/1.91  ** KEPT (pick-wt=8): 6 [] -relation(A)|transitive(A)| -is_transitive_in(A,relation_field(A)).
% 1.69/1.91  ** KEPT (pick-wt=6): 7 [] -relation(A)| -well_ordering(A)|reflexive(A).
% 1.69/1.91  ** KEPT (pick-wt=6): 8 [] -relation(A)| -well_ordering(A)|transitive(A).
% 1.69/1.91  ** KEPT (pick-wt=6): 9 [] -relation(A)| -well_ordering(A)|antisymmetric(A).
% 1.69/1.91  ** KEPT (pick-wt=6): 10 [] -relation(A)| -well_ordering(A)|connected(A).
% 1.69/1.91  ** KEPT (pick-wt=6): 11 [] -relation(A)| -well_ordering(A)|well_founded_relation(A).
% 1.69/1.91  ** KEPT (pick-wt=14): 12 [] -relation(A)|well_ordering(A)| -reflexive(A)| -transitive(A)| -antisymmetric(A)| -connected(A)| -well_founded_relation(A).
% 1.69/1.91  ** KEPT (pick-wt=8): 13 [] -relation(A)| -well_orders(A,B)|is_reflexive_in(A,B).
% 1.69/1.91  ** KEPT (pick-wt=8): 14 [] -relation(A)| -well_orders(A,B)|is_transitive_in(A,B).
% 1.69/1.91  ** KEPT (pick-wt=8): 15 [] -relation(A)| -well_orders(A,B)|is_antisymmetric_in(A,B).
% 1.69/1.91  ** KEPT (pick-wt=8): 16 [] -relation(A)| -well_orders(A,B)|is_connected_in(A,B).
% 1.69/1.91  ** KEPT (pick-wt=8): 17 [] -relation(A)| -well_orders(A,B)|is_well_founded_in(A,B).
% 1.69/1.91  ** KEPT (pick-wt=20): 18 [] -relation(A)|well_orders(A,B)| -is_reflexive_in(A,B)| -is_transitive_in(A,B)| -is_antisymmetric_in(A,B)| -is_connected_in(A,B)| -is_well_founded_in(A,B).
% 1.69/1.91  ** KEPT (pick-wt=10): 20 [copy,19,flip.2] -relation(A)|set_union2(relation_dom(A),relation_rng(A))=relation_field(A).
% 1.69/1.91  ** KEPT (pick-wt=8): 21 [] -relation(A)| -reflexive(A)|is_reflexive_in(A,relation_field(A)).
% 1.69/1.91  ** KEPT (pick-wt=8): 22 [] -relation(A)|reflexive(A)| -is_reflexive_in(A,relation_field(A)).
% 1.69/1.91  ** KEPT (pick-wt=8): 23 [] -relation(A)| -well_founded_relation(A)|is_well_founded_in(A,relation_field(A)).
% 1.69/1.91  ** KEPT (pick-wt=8): 24 [] -relation(A)|well_founded_relation(A)| -is_well_founded_in(A,relation_field(A)).
% 1.69/1.91  ** KEPT (pick-wt=6): 25 [] -well_orders($c1,relation_field($c1))| -well_ordering($c1).
% 1.69/1.91  
% 1.69/1.91  ------------> process sos:
% 1.69/1.91  ** KEPT (pick-wt=3): 26 [] A=A.
% 1.69/1.91  ** KEPT (pick-wt=7): 27 [] set_union2(A,B)=set_union2(B,A).
% 1.69/1.91  ** KEPT (pick-wt=5): 28 [] set_union2(A,A)=A.
% 1.69/1.91  ---> New Demodulator: 29 [new_demod,28] set_union2(A,A)=A.
% 1.69/1.91  ** KEPT (pick-wt=2): 30 [] relation($c1).
% 1.69/1.91  ** KEPT (pick-wt=6): 31 [] well_orders($c1,relation_field($c1))|well_ordering($c1).
% 1.69/1.91    Following clause subsumed by 26 during input processing: 0 [copy,26,flip.1] A=A.
% 1.69/1.91    Following clause subsumed by 27 during input processing: 0 [copy,27,flip.1] set_union2(A,B)=set_union2(B,A).
% 1.69/1.91  >>>> Starting back demodulation with 29.
% 1.69/1.91  
% 1.69/1.91  ======= end of input processing =======
% 1.69/1.91  
% 1.69/1.91  =========== start of search ===========
% 1.69/1.91  
% 1.69/1.91  -------- PROOF -------- 
% 1.69/1.91  
% 1.69/1.91  -----> EMPTY CLAUSE at   0.00 sec ----> 59 [hyper,57,25,58] $F.
% 1.69/1.91  
% 1.69/1.91  Length of proof is 22.  Level of proof is 5.
% 1.69/1.91  
% 1.69/1.91  ---------------- PROOF ----------------
% 1.69/1.91  % SZS status Theorem
% 1.69/1.91  % SZS output start Refutation
% See solution above
% 1.69/1.91  ------------ end of proof -------------
% 1.69/1.91  
% 1.69/1.91  
% 1.69/1.91  Search stopped by max_proofs option.
% 1.69/1.91  
% 1.69/1.91  
% 1.69/1.91  Search stopped by max_proofs option.
% 1.69/1.91  
% 1.69/1.91  ============ end of search ============
% 1.69/1.91  
% 1.69/1.91  -------------- statistics -------------
% 1.69/1.91  clauses given                 30
% 1.69/1.91  clauses generated             89
% 1.69/1.91  clauses kept                  54
% 1.69/1.91  clauses forward subsumed      65
% 1.69/1.91  clauses back subsumed         11
% 1.69/1.91  Kbytes malloced              976
% 1.69/1.91  
% 1.69/1.91  ----------- times (seconds) -----------
% 1.69/1.91  user CPU time          0.00          (0 hr, 0 min, 0 sec)
% 1.69/1.91  system CPU time        0.00          (0 hr, 0 min, 0 sec)
% 1.69/1.91  wall-clock time        1             (0 hr, 0 min, 1 sec)
% 1.69/1.91  
% 1.69/1.91  That finishes the proof of the theorem.
% 1.69/1.91  
% 1.69/1.91  Process 3409 finished Wed Jul 27 08:02:25 2022
% 1.69/1.91  Otter interrupted
% 1.69/1.91  PROOF FOUND
%------------------------------------------------------------------------------