TSTP Solution File: SEU292+1 by Otter---3.3
View Problem
- Process Solution
%------------------------------------------------------------------------------
% File : Otter---3.3
% Problem : SEU292+1 : TPTP v8.1.0. Released v3.3.0.
% Transfm : none
% Format : tptp:raw
% Command : otter-tptp-script %s
% Computer : n029.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 13:15:29 EDT 2022
% Result : Timeout 299.87s 300.02s
% Output : None
% Verified :
% SZS Type : -
% Comments :
%------------------------------------------------------------------------------
%----No solution output by system
%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.07/0.12 % Problem : SEU292+1 : TPTP v8.1.0. Released v3.3.0.
% 0.07/0.12 % Command : otter-tptp-script %s
% 0.12/0.33 % Computer : n029.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
% 0.12/0.34 % WCLimit : 300
% 0.12/0.34 % DateTime : Wed Jul 27 08:04:29 EDT 2022
% 0.12/0.34 % CPUTime :
% 1.94/2.12 ----- Otter 3.3f, August 2004 -----
% 1.94/2.12 The process was started by sandbox2 on n029.cluster.edu,
% 1.94/2.12 Wed Jul 27 08:04:29 2022
% 1.94/2.12 The command was "./otter". The process ID is 6972.
% 1.94/2.12
% 1.94/2.12 set(prolog_style_variables).
% 1.94/2.12 set(auto).
% 1.94/2.12 dependent: set(auto1).
% 1.94/2.12 dependent: set(process_input).
% 1.94/2.12 dependent: clear(print_kept).
% 1.94/2.12 dependent: clear(print_new_demod).
% 1.94/2.12 dependent: clear(print_back_demod).
% 1.94/2.12 dependent: clear(print_back_sub).
% 1.94/2.12 dependent: set(control_memory).
% 1.94/2.12 dependent: assign(max_mem, 12000).
% 1.94/2.12 dependent: assign(pick_given_ratio, 4).
% 1.94/2.12 dependent: assign(stats_level, 1).
% 1.94/2.12 dependent: assign(max_seconds, 10800).
% 1.94/2.12 clear(print_given).
% 1.94/2.12
% 1.94/2.12 formula_list(usable).
% 1.94/2.12 all A (A=A).
% 1.94/2.12 all A B (in(A,B)-> -in(B,A)).
% 1.94/2.12 all A (empty(A)->function(A)).
% 1.94/2.12 all A (empty(A)->relation(A)).
% 1.94/2.12 all A B C (element(C,powerset(cartesian_product2(A,B)))->relation(C)).
% 1.94/2.12 all A (relation(A)&empty(A)&function(A)->relation(A)&function(A)&one_to_one(A)).
% 1.94/2.12 all A B C (relation_of2_as_subset(C,A,B)-> ((B=empty_set->A=empty_set)-> (quasi_total(C,A,B)<->A=relation_dom_as_subset(A,B,C)))& (B=empty_set->A=empty_set| (quasi_total(C,A,B)<->C=empty_set))).
% 1.94/2.12 $T.
% 1.94/2.12 $T.
% 1.94/2.12 $T.
% 1.94/2.12 $T.
% 1.94/2.12 $T.
% 1.94/2.12 all A B C (relation_of2(C,A,B)->element(relation_dom_as_subset(A,B,C),powerset(A))).
% 1.94/2.12 all A B (relation(A)&relation(B)->relation(relation_composition(A,B))).
% 1.94/2.12 $T.
% 1.94/2.12 $T.
% 1.94/2.12 all A B C (relation_of2_as_subset(C,A,B)->element(C,powerset(cartesian_product2(A,B)))).
% 1.94/2.12 all A B exists C relation_of2(C,A,B).
% 1.94/2.12 all A exists B element(B,A).
% 1.94/2.12 all A B exists C relation_of2_as_subset(C,A,B).
% 1.94/2.12 all A B (empty(A)&relation(B)->empty(relation_composition(B,A))&relation(relation_composition(B,A))).
% 1.94/2.12 empty(empty_set).
% 1.94/2.12 relation(empty_set).
% 1.94/2.12 relation_empty_yielding(empty_set).
% 1.94/2.12 all A B (relation(A)&function(A)&relation(B)&function(B)->relation(relation_composition(A,B))&function(relation_composition(A,B))).
% 1.94/2.12 all A (-empty(powerset(A))).
% 1.94/2.12 empty(empty_set).
% 1.94/2.12 empty(empty_set).
% 1.94/2.12 relation(empty_set).
% 1.94/2.12 all A B (-empty(A)& -empty(B)-> -empty(cartesian_product2(A,B))).
% 1.94/2.12 all A (-empty(A)&relation(A)-> -empty(relation_dom(A))).
% 1.94/2.12 all A (empty(A)->empty(relation_dom(A))&relation(relation_dom(A))).
% 1.94/2.12 all A B (empty(A)&relation(B)->empty(relation_composition(A,B))&relation(relation_composition(A,B))).
% 1.94/2.12 exists A (relation(A)&function(A)).
% 1.94/2.12 all A B exists C (relation_of2(C,A,B)&relation(C)&function(C)&quasi_total(C,A,B)).
% 1.94/2.12 exists A (relation(A)&function(A)&one_to_one(A)&empty(A)).
% 1.94/2.12 exists A (empty(A)&relation(A)).
% 1.94/2.12 all A (-empty(A)-> (exists B (element(B,powerset(A))& -empty(B)))).
% 1.94/2.12 exists A empty(A).
% 1.94/2.12 exists A (relation(A)&empty(A)&function(A)).
% 1.94/2.12 all A B exists C (relation_of2(C,A,B)&relation(C)&function(C)).
% 1.94/2.12 exists A (-empty(A)&relation(A)).
% 1.94/2.12 all A exists B (element(B,powerset(A))&empty(B)).
% 1.94/2.12 exists A (-empty(A)).
% 1.94/2.12 exists A (relation(A)&function(A)&one_to_one(A)).
% 1.94/2.12 exists A (relation(A)&relation_empty_yielding(A)).
% 1.94/2.12 exists A (relation(A)&relation_empty_yielding(A)&function(A)).
% 1.94/2.12 all A B C (relation_of2(C,A,B)->relation_dom_as_subset(A,B,C)=relation_dom(C)).
% 1.94/2.12 all A B C (relation_of2_as_subset(C,A,B)<->relation_of2(C,A,B)).
% 1.94/2.12 all A B subset(A,A).
% 1.94/2.12 all A B (in(A,B)->element(A,B)).
% 1.94/2.12 -(all A B C D (function(D)&quasi_total(D,A,B)&relation_of2_as_subset(D,A,B)-> (all E (relation(E)&function(E)-> (in(C,A)->B=empty_set|apply(relation_composition(D,E),C)=apply(E,apply(D,C))))))).
% 1.94/2.12 all A B (relation(B)&function(B)-> (all C (relation(C)&function(C)-> (in(A,relation_dom(B))->apply(relation_composition(B,C),A)=apply(C,apply(B,A)))))).
% 1.94/2.12 all A B (element(A,B)->empty(B)|in(A,B)).
% 1.94/2.12 all A B (element(A,powerset(B))<->subset(A,B)).
% 1.94/2.12 all A B C (in(A,B)&element(B,powerset(C))->element(A,C)).
% 1.94/2.12 all A B C (-(in(A,B)&element(B,powerset(C))&empty(C))).
% 1.94/2.12 all A (empty(A)->A=empty_set).
% 1.94/2.12 all A B (-(in(A,B)&empty(B))).
% 1.94/2.12 all A B (-(empty(A)&A!=B&empty(B))).
% 1.94/2.12 end_of_list.
% 1.94/2.12
% 1.94/2.12 -------> usable clausifies to:
% 1.94/2.12
% 1.94/2.12 list(usable).
% 1.94/2.12 0 [] A=A.
% 1.94/2.12 0 [] -in(A,B)| -in(B,A).
% 1.94/2.12 0 [] -empty(A)|function(A).
% 1.94/2.12 0 [] -empty(A)|relation(A).
% 1.94/2.12 0 [] -element(C,powerset(cartesian_product2(A,B)))|relation(C).
% 1.94/2.12 0 [] -relation(A)| -empty(A)| -function(A)|one_to_one(A).
% 1.94/2.12 0 [] -relation_of2_as_subset(C,A,B)|B=empty_set| -quasi_total(C,A,B)|A=relation_dom_as_subset(A,B,C).
% 1.94/2.12 0 [] -relation_of2_as_subset(C,A,B)|B=empty_set|quasi_total(C,A,B)|A!=relation_dom_as_subset(A,B,C).
% 1.94/2.12 0 [] -relation_of2_as_subset(C,A,B)|A!=empty_set| -quasi_total(C,A,B)|A=relation_dom_as_subset(A,B,C).
% 1.94/2.12 0 [] -relation_of2_as_subset(C,A,B)|A!=empty_set|quasi_total(C,A,B)|A!=relation_dom_as_subset(A,B,C).
% 1.94/2.12 0 [] -relation_of2_as_subset(C,A,B)|B!=empty_set|A=empty_set| -quasi_total(C,A,B)|C=empty_set.
% 1.94/2.12 0 [] -relation_of2_as_subset(C,A,B)|B!=empty_set|A=empty_set|quasi_total(C,A,B)|C!=empty_set.
% 1.94/2.12 0 [] $T.
% 1.94/2.12 0 [] $T.
% 1.94/2.12 0 [] $T.
% 1.94/2.12 0 [] $T.
% 1.94/2.12 0 [] $T.
% 1.94/2.12 0 [] -relation_of2(C,A,B)|element(relation_dom_as_subset(A,B,C),powerset(A)).
% 1.94/2.12 0 [] -relation(A)| -relation(B)|relation(relation_composition(A,B)).
% 1.94/2.12 0 [] $T.
% 1.94/2.12 0 [] $T.
% 1.94/2.12 0 [] -relation_of2_as_subset(C,A,B)|element(C,powerset(cartesian_product2(A,B))).
% 1.94/2.12 0 [] relation_of2($f1(A,B),A,B).
% 1.94/2.12 0 [] element($f2(A),A).
% 1.94/2.12 0 [] relation_of2_as_subset($f3(A,B),A,B).
% 1.94/2.12 0 [] -empty(A)| -relation(B)|empty(relation_composition(B,A)).
% 1.94/2.12 0 [] -empty(A)| -relation(B)|relation(relation_composition(B,A)).
% 1.94/2.12 0 [] empty(empty_set).
% 1.94/2.12 0 [] relation(empty_set).
% 1.94/2.12 0 [] relation_empty_yielding(empty_set).
% 1.94/2.12 0 [] -relation(A)| -function(A)| -relation(B)| -function(B)|relation(relation_composition(A,B)).
% 1.94/2.12 0 [] -relation(A)| -function(A)| -relation(B)| -function(B)|function(relation_composition(A,B)).
% 1.94/2.12 0 [] -empty(powerset(A)).
% 1.94/2.12 0 [] empty(empty_set).
% 1.94/2.12 0 [] empty(empty_set).
% 1.94/2.12 0 [] relation(empty_set).
% 1.94/2.12 0 [] empty(A)|empty(B)| -empty(cartesian_product2(A,B)).
% 1.94/2.12 0 [] empty(A)| -relation(A)| -empty(relation_dom(A)).
% 1.94/2.12 0 [] -empty(A)|empty(relation_dom(A)).
% 1.94/2.12 0 [] -empty(A)|relation(relation_dom(A)).
% 1.94/2.12 0 [] -empty(A)| -relation(B)|empty(relation_composition(A,B)).
% 1.94/2.12 0 [] -empty(A)| -relation(B)|relation(relation_composition(A,B)).
% 1.94/2.12 0 [] relation($c1).
% 1.94/2.12 0 [] function($c1).
% 1.94/2.12 0 [] relation_of2($f4(A,B),A,B).
% 1.94/2.12 0 [] relation($f4(A,B)).
% 1.94/2.12 0 [] function($f4(A,B)).
% 1.94/2.12 0 [] quasi_total($f4(A,B),A,B).
% 1.94/2.12 0 [] relation($c2).
% 1.94/2.12 0 [] function($c2).
% 1.94/2.12 0 [] one_to_one($c2).
% 1.94/2.12 0 [] empty($c2).
% 1.94/2.12 0 [] empty($c3).
% 1.94/2.12 0 [] relation($c3).
% 1.94/2.12 0 [] empty(A)|element($f5(A),powerset(A)).
% 1.94/2.12 0 [] empty(A)| -empty($f5(A)).
% 1.94/2.12 0 [] empty($c4).
% 1.94/2.12 0 [] relation($c5).
% 1.94/2.12 0 [] empty($c5).
% 1.94/2.12 0 [] function($c5).
% 1.94/2.12 0 [] relation_of2($f6(A,B),A,B).
% 1.94/2.12 0 [] relation($f6(A,B)).
% 1.94/2.12 0 [] function($f6(A,B)).
% 1.94/2.12 0 [] -empty($c6).
% 1.94/2.12 0 [] relation($c6).
% 1.94/2.12 0 [] element($f7(A),powerset(A)).
% 1.94/2.12 0 [] empty($f7(A)).
% 1.94/2.12 0 [] -empty($c7).
% 1.94/2.12 0 [] relation($c8).
% 1.94/2.12 0 [] function($c8).
% 1.94/2.12 0 [] one_to_one($c8).
% 1.94/2.12 0 [] relation($c9).
% 1.94/2.12 0 [] relation_empty_yielding($c9).
% 1.94/2.12 0 [] relation($c10).
% 1.94/2.12 0 [] relation_empty_yielding($c10).
% 1.94/2.12 0 [] function($c10).
% 1.94/2.12 0 [] -relation_of2(C,A,B)|relation_dom_as_subset(A,B,C)=relation_dom(C).
% 1.94/2.12 0 [] -relation_of2_as_subset(C,A,B)|relation_of2(C,A,B).
% 1.94/2.12 0 [] relation_of2_as_subset(C,A,B)| -relation_of2(C,A,B).
% 1.94/2.12 0 [] subset(A,A).
% 1.94/2.12 0 [] -in(A,B)|element(A,B).
% 1.94/2.12 0 [] function($c12).
% 1.94/2.12 0 [] quasi_total($c12,$c15,$c14).
% 1.94/2.12 0 [] relation_of2_as_subset($c12,$c15,$c14).
% 1.94/2.12 0 [] relation($c11).
% 1.94/2.12 0 [] function($c11).
% 1.94/2.12 0 [] in($c13,$c15).
% 1.94/2.12 0 [] $c14!=empty_set.
% 1.94/2.12 0 [] apply(relation_composition($c12,$c11),$c13)!=apply($c11,apply($c12,$c13)).
% 1.94/2.12 0 [] -relation(B)| -function(B)| -relation(C)| -function(C)| -in(A,relation_dom(B))|apply(relation_composition(B,C),A)=apply(C,apply(B,A)).
% 1.94/2.12 0 [] -element(A,B)|empty(B)|in(A,B).
% 1.94/2.12 0 [] -element(A,powerset(B))|subset(A,B).
% 1.94/2.12 0 [] element(A,powerset(B))| -subset(A,B).
% 1.94/2.12 0 [] -in(A,B)| -element(B,powerset(C))|element(A,C).
% 1.94/2.12 0 [] -in(A,B)| -element(B,powerset(C))| -empty(C).
% 1.94/2.12 0 [] -empty(A)|A=empty_set.
% 1.94/2.12 0 [] -in(A,B)| -empty(B).
% 1.94/2.12 0 [] -empty(A)|A=B| -empty(B).
% 1.94/2.12 end_of_list.
% 1.94/2.12
% 1.94/2.12 SCAN INPUT: prop=0, horn=0, equality=1, symmetry=0, max_lits=6.
% 1.94/2.12
% 1.94/2.12 This ia a non-Horn set with equality. The strategy will be
% 1.94/2.12 Knuth-Bendix, ordered hyper_res, factoring, and unit
% 1.94/2.12 deletion, with positive clauses in sos and nonpositive
% 1.94/2.12 clauses in usable.
% 1.94/2.12
% 1.94/2.12 dependent: set(knuth_bendix).
% 1.94/2.12 dependent: set(anl_eq).
% 1.94/2.12 dependent: set(para_from).
% 1.94/2.12 dependent: set(para_into).
% 1.94/2.12 dependent: clear(para_from_right).
% 1.94/2.12 dependent: clear(para_into_right).
% 1.94/2.12 dependent: set(para_from_vars).
% 1.94/2.12 dependent: set(eq_units_both_ways).
% 1.94/2.12 dependent: set(dynamic_demod_all).
% 1.94/2.12 dependent: set(dynamic_demod).
% 1.94/2.12 dependent: set(order_eq).
% 1.94/2.12 dependent: set(back_demod).
% 1.94/2.12 dependent: set(lrpo).
% 1.94/2.12 dependent: set(hyper_res).
% 1.94/2.12 dependent: set(unit_deletion).
% 1.94/2.12 dependent: set(factor).
% 1.94/2.12
% 1.94/2.12 ------------> process usable:
% 1.94/2.12 ** KEPT (pick-wt=6): 1 [] -in(A,B)| -in(B,A).
% 1.94/2.12 ** KEPT (pick-wt=4): 2 [] -empty(A)|function(A).
% 1.94/2.12 ** KEPT (pick-wt=4): 3 [] -empty(A)|relation(A).
% 1.94/2.12 ** KEPT (pick-wt=8): 4 [] -element(A,powerset(cartesian_product2(B,C)))|relation(A).
% 1.94/2.12 ** KEPT (pick-wt=8): 5 [] -relation(A)| -empty(A)| -function(A)|one_to_one(A).
% 1.94/2.12 ** KEPT (pick-wt=17): 7 [copy,6,flip.4] -relation_of2_as_subset(A,B,C)|C=empty_set| -quasi_total(A,B,C)|relation_dom_as_subset(B,C,A)=B.
% 1.94/2.12 ** KEPT (pick-wt=17): 9 [copy,8,flip.4] -relation_of2_as_subset(A,B,C)|C=empty_set|quasi_total(A,B,C)|relation_dom_as_subset(B,C,A)!=B.
% 1.94/2.12 ** KEPT (pick-wt=17): 11 [copy,10,flip.4] -relation_of2_as_subset(A,B,C)|B!=empty_set| -quasi_total(A,B,C)|relation_dom_as_subset(B,C,A)=B.
% 1.94/2.12 ** KEPT (pick-wt=17): 13 [copy,12,flip.4] -relation_of2_as_subset(A,B,C)|B!=empty_set|quasi_total(A,B,C)|relation_dom_as_subset(B,C,A)!=B.
% 1.94/2.12 ** KEPT (pick-wt=17): 14 [] -relation_of2_as_subset(A,B,C)|C!=empty_set|B=empty_set| -quasi_total(A,B,C)|A=empty_set.
% 1.94/2.12 ** KEPT (pick-wt=17): 15 [] -relation_of2_as_subset(A,B,C)|C!=empty_set|B=empty_set|quasi_total(A,B,C)|A!=empty_set.
% 1.94/2.12 ** KEPT (pick-wt=11): 16 [] -relation_of2(A,B,C)|element(relation_dom_as_subset(B,C,A),powerset(B)).
% 1.94/2.12 ** KEPT (pick-wt=8): 17 [] -relation(A)| -relation(B)|relation(relation_composition(A,B)).
% 1.94/2.12 ** KEPT (pick-wt=10): 18 [] -relation_of2_as_subset(A,B,C)|element(A,powerset(cartesian_product2(B,C))).
% 1.94/2.12 ** KEPT (pick-wt=8): 19 [] -empty(A)| -relation(B)|empty(relation_composition(B,A)).
% 1.94/2.12 ** KEPT (pick-wt=8): 20 [] -empty(A)| -relation(B)|relation(relation_composition(B,A)).
% 1.94/2.12 Following clause subsumed by 17 during input processing: 0 [] -relation(A)| -function(A)| -relation(B)| -function(B)|relation(relation_composition(A,B)).
% 1.94/2.12 ** KEPT (pick-wt=12): 21 [] -relation(A)| -function(A)| -relation(B)| -function(B)|function(relation_composition(A,B)).
% 1.94/2.12 ** KEPT (pick-wt=3): 22 [] -empty(powerset(A)).
% 1.94/2.12 ** KEPT (pick-wt=8): 23 [] empty(A)|empty(B)| -empty(cartesian_product2(A,B)).
% 1.94/2.12 ** KEPT (pick-wt=7): 24 [] empty(A)| -relation(A)| -empty(relation_dom(A)).
% 1.94/2.12 ** KEPT (pick-wt=5): 25 [] -empty(A)|empty(relation_dom(A)).
% 1.94/2.12 ** KEPT (pick-wt=5): 26 [] -empty(A)|relation(relation_dom(A)).
% 1.94/2.12 ** KEPT (pick-wt=8): 27 [] -empty(A)| -relation(B)|empty(relation_composition(A,B)).
% 1.94/2.12 ** KEPT (pick-wt=8): 28 [] -empty(A)| -relation(B)|relation(relation_composition(A,B)).
% 1.94/2.12 ** KEPT (pick-wt=5): 29 [] empty(A)| -empty($f5(A)).
% 1.94/2.12 ** KEPT (pick-wt=2): 30 [] -empty($c6).
% 1.94/2.12 ** KEPT (pick-wt=2): 31 [] -empty($c7).
% 1.94/2.12 ** KEPT (pick-wt=11): 32 [] -relation_of2(A,B,C)|relation_dom_as_subset(B,C,A)=relation_dom(A).
% 1.94/2.12 ** KEPT (pick-wt=8): 33 [] -relation_of2_as_subset(A,B,C)|relation_of2(A,B,C).
% 1.94/2.12 ** KEPT (pick-wt=8): 34 [] relation_of2_as_subset(A,B,C)| -relation_of2(A,B,C).
% 1.94/2.12 ** KEPT (pick-wt=6): 35 [] -in(A,B)|element(A,B).
% 1.94/2.12 ** KEPT (pick-wt=3): 37 [copy,36,flip.1] empty_set!=$c14.
% 1.94/2.12 ** KEPT (pick-wt=11): 38 [] apply(relation_composition($c12,$c11),$c13)!=apply($c11,apply($c12,$c13)).
% 1.94/2.12 ** KEPT (pick-wt=23): 39 [] -relation(A)| -function(A)| -relation(B)| -function(B)| -in(C,relation_dom(A))|apply(relation_composition(A,B),C)=apply(B,apply(A,C)).
% 1.94/2.12 ** KEPT (pick-wt=8): 40 [] -element(A,B)|empty(B)|in(A,B).
% 1.94/2.12 ** KEPT (pick-wt=7): 41 [] -element(A,powerset(B))|subset(A,B).
% 1.94/2.12 ** KEPT (pick-wt=7): 42 [] element(A,powerset(B))| -subset(A,B).
% 1.94/2.12 ** KEPT (pick-wt=10): 43 [] -in(A,B)| -element(B,powerset(C))|element(A,C).
% 1.94/2.12 ** KEPT (pick-wt=9): 44 [] -in(A,B)| -element(B,powerset(C))| -empty(C).
% 1.94/2.12 ** KEPT (pick-wt=5): 45 [] -empty(A)|A=empty_set.
% 1.94/2.12 ** KEPT (pick-wt=5): 46 [] -in(A,B)| -empty(B).
% 1.94/2.12 ** KEPT (pick-wt=7): 47 [] -empty(A)|A=B| -empty(B).
% 1.94/2.12
% 1.94/2.12 ------------> process sos:
% 1.94/2.12 ** KEPT (pick-wt=3): 56 [] A=A.
% 1.94/2.12 ** KEPT (pick-wt=6): 57 [] relation_of2($f1(A,B),A,B).
% 1.94/2.12 ** KEPT (pick-wt=4): 58 [] element($f2(A),A).
% 1.94/2.12 ** KEPT (pick-wt=6): 59 [] relation_of2_as_subset($f3(A,B),A,B).
% 1.94/2.12 ** KEPT (pick-wt=2): 60 [] empty(empty_set).
% 1.94/2.12 ** KEPT (pick-wt=2): 61 [] relation(empty_set)Alarm clock
% 299.87/300.02 Otter interrupted
% 299.87/300.02 PROOF NOT FOUND
%------------------------------------------------------------------------------