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Otter---3.3.UNS-Ref.s

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%------------------------------------------------------------------------------
% File     : Otter---3.3
% Problem  : SWV300-2 : TPTP v8.1.0. Released v3.2.0.
% Transfm  : none
% Format   : tptp:raw
% Command  : otter-tptp-script %s

% Computer : n015.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 13:20:25 EDT 2022

% Result   : Unsatisfiable 1.97s 2.15s
% Output   : Refutation 1.97s
% Verified : 
% SZS Type : Refutation
%            Derivation depth      :   11
%            Number of leaves      :   14
% Syntax   : Number of clauses     :   25 (  15 unt;   3 nHn;  25 RR)
%            Number of literals    :   39 (   0 equ;  13 neg)
%            Maximal clause size   :    3 (   1 avg)
%            Maximal term depth    :    7 (   2 avg)
%            Number of predicates  :    2 (   1 usr;   1 prp; 0-3 aty)
%            Number of functors    :   30 (  30 usr;  16 con; 0-3 aty)
%            Number of variables   :   26 (   4 sgn)

% Comments : 
%------------------------------------------------------------------------------
cnf(1,axiom,
    ~ c_in(v_A,c_Event_Obad,tc_Message_Oagent),
    file('SWV300-2.p',unknown),
    [] ).

cnf(2,axiom,
    ~ c_in(c_Message_Omsg_OCrypt(c_Public_OshrK(v_A),c_Message_Omsg_OMPair(v_NA,c_Message_Omsg_OKey(v_K))),c_Message_Oparts(c_Event_Oknows(c_Message_Oagent_OSpy,v_evs4)),tc_Message_Omsg),
    file('SWV300-2.p',unknown),
    [] ).

cnf(3,axiom,
    ( ~ c_in(c_Event_Oevent_OSays(A,B,C),c_List_Oset(D,tc_Event_Oevent),tc_Event_Oevent)
    | c_in(C,c_Message_Oanalz(c_Event_Oknows(c_Message_Oagent_OSpy,D)),tc_Message_Omsg) ),
    file('SWV300-2.p',unknown),
    [] ).

cnf(4,axiom,
    ( ~ c_in(c_Message_Omsg_OCrypt(A,B),c_Message_Osynth(C),tc_Message_Omsg)
    | c_in(c_Message_Omsg_OCrypt(A,B),C,tc_Message_Omsg)
    | c_in(c_Message_Omsg_OKey(A),C,tc_Message_Omsg) ),
    file('SWV300-2.p',unknown),
    [] ).

cnf(5,axiom,
    ( ~ c_in(A,c_Message_Oparts(c_insert(B,C,tc_Message_Omsg)),tc_Message_Omsg)
    | ~ c_in(B,c_Message_Osynth(c_Message_Oanalz(C)),tc_Message_Omsg)
    | c_in(A,c_union(c_Message_Osynth(c_Message_Oanalz(C)),c_Message_Oparts(C),tc_Message_Omsg),tc_Message_Omsg) ),
    file('SWV300-2.p',unknown),
    [] ).

cnf(6,axiom,
    ( ~ c_in(c_Message_Omsg_OMPair(A,B),c_Message_Oanalz(C),tc_Message_Omsg)
    | c_in(B,c_Message_Oanalz(C),tc_Message_Omsg) ),
    file('SWV300-2.p',unknown),
    [] ).

cnf(7,axiom,
    ( ~ c_in(c_Message_Omsg_OMPair(A,B),c_Message_Osynth(c_Message_Oanalz(C)),tc_Message_Omsg)
    | c_in(A,c_Message_Osynth(c_Message_Oanalz(C)),tc_Message_Omsg) ),
    file('SWV300-2.p',unknown),
    [] ).

cnf(8,axiom,
    ( ~ c_in(A,c_Message_Oanalz(B),tc_Message_Omsg)
    | c_in(A,c_Message_Oparts(B),tc_Message_Omsg) ),
    file('SWV300-2.p',unknown),
    [] ).

cnf(9,axiom,
    ( ~ c_in(A,B,tc_Message_Omsg)
    | c_in(A,c_Message_Osynth(B),tc_Message_Omsg) ),
    file('SWV300-2.p',unknown),
    [] ).

cnf(10,axiom,
    ( ~ c_in(A,c_OtwayRees_Ootway,tc_List_Olist(tc_Event_Oevent))
    | ~ c_in(c_Message_Omsg_OKey(c_Public_OshrK(B)),c_Message_Oparts(c_Event_Oknows(c_Message_Oagent_OSpy,A)),tc_Message_Omsg)
    | c_in(B,c_Event_Obad,tc_Message_Oagent) ),
    file('SWV300-2.p',unknown),
    [] ).

cnf(11,axiom,
    ( ~ c_in(A,c_union(B,C,D),D)
    | c_in(A,C,D)
    | c_in(A,B,D) ),
    file('SWV300-2.p',unknown),
    [] ).

cnf(13,axiom,
    c_in(v_evs4,c_OtwayRees_Ootway,tc_List_Olist(tc_Event_Oevent)),
    file('SWV300-2.p',unknown),
    [] ).

cnf(14,axiom,
    c_in(c_Event_Oevent_OSays(v_Aaa,v_Ba,c_Message_Omsg_OMPair(c_Message_Omsg_ONonce(v_NAa),c_Message_Omsg_OMPair(v_X,c_Message_Omsg_OCrypt(c_Public_OshrK(v_Ba),c_Message_Omsg_OMPair(c_Message_Omsg_ONonce(v_NB),c_Message_Omsg_OKey(v_Ka)))))),c_List_Oset(v_evs4,tc_Event_Oevent),tc_Event_Oevent),
    file('SWV300-2.p',unknown),
    [] ).

cnf(15,axiom,
    c_in(c_Message_Omsg_OCrypt(c_Public_OshrK(v_A),c_Message_Omsg_OMPair(v_NA,c_Message_Omsg_OKey(v_K))),c_Message_Oparts(c_insert(v_X,c_Event_Oknows(c_Message_Oagent_OSpy,v_evs4),tc_Message_Omsg)),tc_Message_Omsg),
    file('SWV300-2.p',unknown),
    [] ).

cnf(20,plain,
    c_in(c_Message_Omsg_OMPair(c_Message_Omsg_ONonce(v_NAa),c_Message_Omsg_OMPair(v_X,c_Message_Omsg_OCrypt(c_Public_OshrK(v_Ba),c_Message_Omsg_OMPair(c_Message_Omsg_ONonce(v_NB),c_Message_Omsg_OKey(v_Ka))))),c_Message_Oanalz(c_Event_Oknows(c_Message_Oagent_OSpy,v_evs4)),tc_Message_Omsg),
    inference(hyper,[status(thm)],[14,3]),
    [iquote('hyper,14,3')] ).

cnf(23,plain,
    c_in(c_Message_Omsg_OMPair(v_X,c_Message_Omsg_OCrypt(c_Public_OshrK(v_Ba),c_Message_Omsg_OMPair(c_Message_Omsg_ONonce(v_NB),c_Message_Omsg_OKey(v_Ka)))),c_Message_Oanalz(c_Event_Oknows(c_Message_Oagent_OSpy,v_evs4)),tc_Message_Omsg),
    inference(hyper,[status(thm)],[20,6]),
    [iquote('hyper,20,6')] ).

cnf(24,plain,
    c_in(c_Message_Omsg_OMPair(v_X,c_Message_Omsg_OCrypt(c_Public_OshrK(v_Ba),c_Message_Omsg_OMPair(c_Message_Omsg_ONonce(v_NB),c_Message_Omsg_OKey(v_Ka)))),c_Message_Osynth(c_Message_Oanalz(c_Event_Oknows(c_Message_Oagent_OSpy,v_evs4))),tc_Message_Omsg),
    inference(hyper,[status(thm)],[23,9]),
    [iquote('hyper,23,9')] ).

cnf(47,plain,
    c_in(v_X,c_Message_Osynth(c_Message_Oanalz(c_Event_Oknows(c_Message_Oagent_OSpy,v_evs4))),tc_Message_Omsg),
    inference(hyper,[status(thm)],[24,7]),
    [iquote('hyper,24,7')] ).

cnf(49,plain,
    c_in(c_Message_Omsg_OCrypt(c_Public_OshrK(v_A),c_Message_Omsg_OMPair(v_NA,c_Message_Omsg_OKey(v_K))),c_union(c_Message_Osynth(c_Message_Oanalz(c_Event_Oknows(c_Message_Oagent_OSpy,v_evs4))),c_Message_Oparts(c_Event_Oknows(c_Message_Oagent_OSpy,v_evs4)),tc_Message_Omsg),tc_Message_Omsg),
    inference(hyper,[status(thm)],[47,5,15]),
    [iquote('hyper,47,5,15')] ).

cnf(73,plain,
    c_in(c_Message_Omsg_OCrypt(c_Public_OshrK(v_A),c_Message_Omsg_OMPair(v_NA,c_Message_Omsg_OKey(v_K))),c_Message_Osynth(c_Message_Oanalz(c_Event_Oknows(c_Message_Oagent_OSpy,v_evs4))),tc_Message_Omsg),
    inference(unit_del,[status(thm)],[inference(hyper,[status(thm)],[49,11]),2]),
    [iquote('hyper,49,11,unit_del,2')] ).

cnf(76,plain,
    ( c_in(c_Message_Omsg_OCrypt(c_Public_OshrK(v_A),c_Message_Omsg_OMPair(v_NA,c_Message_Omsg_OKey(v_K))),c_Message_Oanalz(c_Event_Oknows(c_Message_Oagent_OSpy,v_evs4)),tc_Message_Omsg)
    | c_in(c_Message_Omsg_OKey(c_Public_OshrK(v_A)),c_Message_Oanalz(c_Event_Oknows(c_Message_Oagent_OSpy,v_evs4)),tc_Message_Omsg) ),
    inference(hyper,[status(thm)],[73,4]),
    [iquote('hyper,73,4')] ).

cnf(100,plain,
    c_in(c_Message_Omsg_OKey(c_Public_OshrK(v_A)),c_Message_Oanalz(c_Event_Oknows(c_Message_Oagent_OSpy,v_evs4)),tc_Message_Omsg),
    inference(unit_del,[status(thm)],[inference(hyper,[status(thm)],[76,8]),2]),
    [iquote('hyper,76,8,unit_del,2')] ).

cnf(104,plain,
    c_in(c_Message_Omsg_OKey(c_Public_OshrK(v_A)),c_Message_Oparts(c_Event_Oknows(c_Message_Oagent_OSpy,v_evs4)),tc_Message_Omsg),
    inference(hyper,[status(thm)],[100,8]),
    [iquote('hyper,100,8')] ).

cnf(105,plain,
    c_in(v_A,c_Event_Obad,tc_Message_Oagent),
    inference(hyper,[status(thm)],[104,10,13]),
    [iquote('hyper,104,10,13')] ).

cnf(106,plain,
    $false,
    inference(binary,[status(thm)],[105,1]),
    [iquote('binary,105.1,1.1')] ).

%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.03/0.12  % Problem  : SWV300-2 : TPTP v8.1.0. Released v3.2.0.
% 0.03/0.13  % Command  : otter-tptp-script %s
% 0.13/0.34  % Computer : n015.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 05:55:56 EDT 2022
% 0.13/0.34  % CPUTime  : 
% 1.97/2.15  ----- Otter 3.3f, August 2004 -----
% 1.97/2.15  The process was started by sandbox on n015.cluster.edu,
% 1.97/2.15  Wed Jul 27 05:55:56 2022
% 1.97/2.15  The command was "./otter".  The process ID is 31791.
% 1.97/2.15  
% 1.97/2.15  set(prolog_style_variables).
% 1.97/2.15  set(auto).
% 1.97/2.15     dependent: set(auto1).
% 1.97/2.15     dependent: set(process_input).
% 1.97/2.15     dependent: clear(print_kept).
% 1.97/2.15     dependent: clear(print_new_demod).
% 1.97/2.15     dependent: clear(print_back_demod).
% 1.97/2.15     dependent: clear(print_back_sub).
% 1.97/2.15     dependent: set(control_memory).
% 1.97/2.15     dependent: assign(max_mem, 12000).
% 1.97/2.15     dependent: assign(pick_given_ratio, 4).
% 1.97/2.15     dependent: assign(stats_level, 1).
% 1.97/2.15     dependent: assign(max_seconds, 10800).
% 1.97/2.15  clear(print_given).
% 1.97/2.15  
% 1.97/2.15  list(usable).
% 1.97/2.15  0 [] -c_in(v_A,c_Event_Obad,tc_Message_Oagent).
% 1.97/2.15  0 [] c_in(v_evs4,c_OtwayRees_Ootway,tc_List_Olist(tc_Event_Oevent)).
% 1.97/2.15  0 [] c_in(c_Event_Oevent_OSays(v_Aaa,v_Ba,c_Message_Omsg_OMPair(c_Message_Omsg_ONonce(v_NAa),c_Message_Omsg_OMPair(v_X,c_Message_Omsg_OCrypt(c_Public_OshrK(v_Ba),c_Message_Omsg_OMPair(c_Message_Omsg_ONonce(v_NB),c_Message_Omsg_OKey(v_Ka)))))),c_List_Oset(v_evs4,tc_Event_Oevent),tc_Event_Oevent).
% 1.97/2.15  0 [] -c_in(c_Message_Omsg_OCrypt(c_Public_OshrK(v_A),c_Message_Omsg_OMPair(v_NA,c_Message_Omsg_OKey(v_K))),c_Message_Oparts(c_Event_Oknows(c_Message_Oagent_OSpy,v_evs4)),tc_Message_Omsg).
% 1.97/2.15  0 [] c_in(c_Message_Omsg_OCrypt(c_Public_OshrK(v_A),c_Message_Omsg_OMPair(v_NA,c_Message_Omsg_OKey(v_K))),c_Message_Oparts(c_insert(v_X,c_Event_Oknows(c_Message_Oagent_OSpy,v_evs4),tc_Message_Omsg)),tc_Message_Omsg).
% 1.97/2.15  0 [] -c_in(c_Event_Oevent_OSays(V_A,V_B,V_X),c_List_Oset(V_evs,tc_Event_Oevent),tc_Event_Oevent)|c_in(V_X,c_Message_Oanalz(c_Event_Oknows(c_Message_Oagent_OSpy,V_evs)),tc_Message_Omsg).
% 1.97/2.15  0 [] -c_in(c_Message_Omsg_OCrypt(V_K,V_X),c_Message_Osynth(V_H),tc_Message_Omsg)|c_in(c_Message_Omsg_OCrypt(V_K,V_X),V_H,tc_Message_Omsg)|c_in(c_Message_Omsg_OKey(V_K),V_H,tc_Message_Omsg).
% 1.97/2.15  0 [] -c_in(V_Z,c_Message_Oparts(c_insert(V_X,V_H,tc_Message_Omsg)),tc_Message_Omsg)| -c_in(V_X,c_Message_Osynth(c_Message_Oanalz(V_H)),tc_Message_Omsg)|c_in(V_Z,c_union(c_Message_Osynth(c_Message_Oanalz(V_H)),c_Message_Oparts(V_H),tc_Message_Omsg),tc_Message_Omsg).
% 1.97/2.15  0 [] -c_in(c_Message_Omsg_OMPair(V_X,V_Y),c_Message_Oanalz(V_H),tc_Message_Omsg)|c_in(V_Y,c_Message_Oanalz(V_H),tc_Message_Omsg).
% 1.97/2.15  0 [] -c_in(c_Message_Omsg_OMPair(V_X,V_Y),c_Message_Osynth(c_Message_Oanalz(V_H)),tc_Message_Omsg)|c_in(V_X,c_Message_Osynth(c_Message_Oanalz(V_H)),tc_Message_Omsg).
% 1.97/2.15  0 [] -c_in(V_c,c_Message_Oanalz(V_H),tc_Message_Omsg)|c_in(V_c,c_Message_Oparts(V_H),tc_Message_Omsg).
% 1.97/2.15  0 [] -c_in(V_X,V_H,tc_Message_Omsg)|c_in(V_X,c_Message_Osynth(V_H),tc_Message_Omsg).
% 1.97/2.15  0 [] -c_in(V_evs,c_OtwayRees_Ootway,tc_List_Olist(tc_Event_Oevent))| -c_in(c_Message_Omsg_OKey(c_Public_OshrK(V_A)),c_Message_Oparts(c_Event_Oknows(c_Message_Oagent_OSpy,V_evs)),tc_Message_Omsg)|c_in(V_A,c_Event_Obad,tc_Message_Oagent).
% 1.97/2.15  0 [] -c_in(V_c,c_union(V_A,V_B,T_a),T_a)|c_in(V_c,V_B,T_a)|c_in(V_c,V_A,T_a).
% 1.97/2.15  end_of_list.
% 1.97/2.15  
% 1.97/2.15  SCAN INPUT: prop=0, horn=0, equality=0, symmetry=0, max_lits=3.
% 1.97/2.15  
% 1.97/2.15  This is a non-Horn set without equality.  The strategy will
% 1.97/2.15  be ordered hyper_res, unit deletion, and factoring, with
% 1.97/2.15  satellites in sos and with nuclei in usable.
% 1.97/2.15  
% 1.97/2.15     dependent: set(hyper_res).
% 1.97/2.15     dependent: set(factor).
% 1.97/2.15     dependent: set(unit_deletion).
% 1.97/2.15  
% 1.97/2.15  ------------> process usable:
% 1.97/2.15  ** KEPT (pick-wt=4): 1 [] -c_in(v_A,c_Event_Obad,tc_Message_Oagent).
% 1.97/2.15  ** KEPT (pick-wt=13): 2 [] -c_in(c_Message_Omsg_OCrypt(c_Public_OshrK(v_A),c_Message_Omsg_OMPair(v_NA,c_Message_Omsg_OKey(v_K))),c_Message_Oparts(c_Event_Oknows(c_Message_Oagent_OSpy,v_evs4)),tc_Message_Omsg).
% 1.97/2.15  ** KEPT (pick-wt=16): 3 [] -c_in(c_Event_Oevent_OSays(A,B,C),c_List_Oset(D,tc_Event_Oevent),tc_Event_Oevent)|c_in(C,c_Message_Oanalz(c_Event_Oknows(c_Message_Oagent_OSpy,D)),tc_Message_Omsg).
% 1.97/2.15  ** KEPT (pick-wt=18): 4 [] -c_in(c_Message_Omsg_OCrypt(A,B),c_Message_Osynth(C),tc_Message_Omsg)|c_in(c_Message_Omsg_OCrypt(A,B),C,tc_Message_Omsg)|c_in(c_Message_Omsg_OKey(A),C,tc_Message_Omsg).
% 1.97/2.15  ** KEPT (pick-wt=24): 5 [] -c_in(A,c_Message_Oparts(c_insert(B,C,tc_Message_Omsg)),tc_Message_Omsg)| -c_in(B,c_Message_Osynth(c_Message_Oanalz(C)),tc_Message_Omsg)|c_in(A,c_union(c_Message_Osynth(c_Message_Oanalz(C)),c_Message_Oparts(C),tc_Message_Omsg),tc_Message_Omsg).
% 1.97/2.15  ** KEPT (pick-wt=12): 6 [] -c_in(c_Message_Omsg_OMPair(A,B),c_Message_Oanalz(C),tc_Message_Omsg)|c_in(B,c_Message_Oanalz(C),tc_Message_Omsg).
% 1.97/2.15  ** KEPT (pick-wt=14): 7 [] -c_in(c_Message_Omsg_OMPair(A,B),c_Message_Osynth(c_Message_Oanalz(C)),tc_Message_Omsg)|c_in(A,c_Message_Osynth(c_Message_Oanalz(C)),tc_Message_Omsg).
% 1.97/2.15  ** KEPT (pick-wt=10): 8 [] -c_in(A,c_Message_Oanalz(B),tc_Message_Omsg)|c_in(A,c_Message_Oparts(B),tc_Message_Omsg).
% 1.97/2.15  ** KEPT (pick-wt=9): 9 [] -c_in(A,B,tc_Message_Omsg)|c_in(A,c_Message_Osynth(B),tc_Message_Omsg).
% 1.97/2.15  ** KEPT (pick-wt=18): 10 [] -c_in(A,c_OtwayRees_Ootway,tc_List_Olist(tc_Event_Oevent))| -c_in(c_Message_Omsg_OKey(c_Public_OshrK(B)),c_Message_Oparts(c_Event_Oknows(c_Message_Oagent_OSpy,A)),tc_Message_Omsg)|c_in(B,c_Event_Obad,tc_Message_Oagent).
% 1.97/2.15  ** KEPT (pick-wt=15): 11 [] -c_in(A,c_union(B,C,D),D)|c_in(A,C,D)|c_in(A,B,D).
% 1.97/2.15  
% 1.97/2.15  ------------> process sos:
% 1.97/2.15  ** KEPT (pick-wt=5): 13 [] c_in(v_evs4,c_OtwayRees_Ootway,tc_List_Olist(tc_Event_Oevent)).
% 1.97/2.15  ** KEPT (pick-wt=21): 14 [] c_in(c_Event_Oevent_OSays(v_Aaa,v_Ba,c_Message_Omsg_OMPair(c_Message_Omsg_ONonce(v_NAa),c_Message_Omsg_OMPair(v_X,c_Message_Omsg_OCrypt(c_Public_OshrK(v_Ba),c_Message_Omsg_OMPair(c_Message_Omsg_ONonce(v_NB),c_Message_Omsg_OKey(v_Ka)))))),c_List_Oset(v_evs4,tc_Event_Oevent),tc_Event_Oevent).
% 1.97/2.15  ** KEPT (pick-wt=16): 15 [] c_in(c_Message_Omsg_OCrypt(c_Public_OshrK(v_A),c_Message_Omsg_OMPair(v_NA,c_Message_Omsg_OKey(v_K))),c_Message_Oparts(c_insert(v_X,c_Event_Oknows(c_Message_Oagent_OSpy,v_evs4),tc_Message_Omsg)),tc_Message_Omsg).
% 1.97/2.15  
% 1.97/2.15  ======= end of input processing =======
% 1.97/2.15  
% 1.97/2.15  =========== start of search ===========
% 1.97/2.15  
% 1.97/2.15  -------- PROOF -------- 
% 1.97/2.15  
% 1.97/2.15  ----> UNIT CONFLICT at   0.00 sec ----> 106 [binary,105.1,1.1] $F.
% 1.97/2.15  
% 1.97/2.15  Length of proof is 10.  Level of proof is 10.
% 1.97/2.15  
% 1.97/2.15  ---------------- PROOF ----------------
% 1.97/2.15  % SZS status Unsatisfiable
% 1.97/2.15  % SZS output start Refutation
% See solution above
% 1.97/2.15  ------------ end of proof -------------
% 1.97/2.15  
% 1.97/2.15  
% 1.97/2.15  Search stopped by max_proofs option.
% 1.97/2.15  
% 1.97/2.15  
% 1.97/2.15  Search stopped by max_proofs option.
% 1.97/2.15  
% 1.97/2.15  ============ end of search ============
% 1.97/2.15  
% 1.97/2.15  -------------- statistics -------------
% 1.97/2.15  clauses given                 78
% 1.97/2.15  clauses generated            117
% 1.97/2.15  clauses kept                 105
% 1.97/2.15  clauses forward subsumed      26
% 1.97/2.15  clauses back subsumed          3
% 1.97/2.15  Kbytes malloced             1953
% 1.97/2.15  
% 1.97/2.15  ----------- times (seconds) -----------
% 1.97/2.15  user CPU time          0.01          (0 hr, 0 min, 0 sec)
% 1.97/2.15  system CPU time        0.00          (0 hr, 0 min, 0 sec)
% 1.97/2.15  wall-clock time        2             (0 hr, 0 min, 2 sec)
% 1.97/2.15  
% 1.97/2.15  That finishes the proof of the theorem.
% 1.97/2.15  
% 1.97/2.15  Process 31791 finished Wed Jul 27 05:55:58 2022
% 1.97/2.15  Otter interrupted
% 1.97/2.15  PROOF FOUND
%------------------------------------------------------------------------------