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Zipperpin---2.1.9999.UNS-Ref.s

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%------------------------------------------------------------------------------
% File     : Zipperpin---2.1.9999
% Problem  : SET511-6 : TPTP v9.2.0. Bugfixed v2.1.0.
% Transfm  : none
% Format   : tptp:raw
% Command  : python3 /export/starexec/sandbox/solver/bin/portfolio.lams.parallel.py %s %d /export/starexec/sandbox/tmp/tmp.WW72DREaKc true

% Computer : n008.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 : Thu Oct  2 04:52:11 PM UTC 2025

% Result   : Unsatisfiable 4.82s 2.07s
% Output   : Refutation 4.82s
% Verified : 
% SZS Type : -

% Comments : 
%------------------------------------------------------------------------------
%----WARNING: Could not form TPTP format derivation
%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.05/0.20  % Problem  : SET511-6 : TPTP v9.2.0. Bugfixed v2.1.0.
% 0.05/0.22  % Command  : python3 /export/starexec/sandbox/solver/bin/portfolio.lams.parallel.py %s %d /export/starexec/sandbox/tmp/tmp.WW72DREaKc true
% 0.08/0.43  % Computer : n008.cluster.edu
% 0.08/0.43  % Model    : x86_64 x86_64
% 0.08/0.43  % CPU      : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz
% 0.08/0.43  % Memory   : 8042.1875MB
% 0.08/0.43  % OS       : Linux 3.10.0-693.el7.x86_64
% 0.08/0.43  % CPULimit : 300
% 0.08/0.43  % WCLimit  : 300
% 0.08/0.43  % DateTime : Wed Oct  1 12:56:08 EDT 2025
% 0.08/0.43  % CPUTime  : 
% 0.08/0.43  % Running portfolio for 300 s
% 0.08/0.43  % File         : /export/starexec/sandbox/benchmark/theBenchmark.p
% 0.08/0.43  % Number of cores: 8
% 0.08/0.44  % Python version: Python 3.6.8
% 0.08/0.44  % Running in FO mode
% 0.31/0.70  % Total configuration time : 435
% 0.31/0.70  % Estimated wc time : 1092
% 0.31/0.70  % Estimated cpu time (7 cpus) : 156.0
% 0.36/0.79  % /export/starexec/sandbox/solver/bin/fo/fo6_bce.sh running for 75s
% 0.36/0.86  % /export/starexec/sandbox/solver/bin/fo/fo3_bce.sh running for 75s
% 0.36/0.91  % /export/starexec/sandbox/solver/bin/fo/fo1_av.sh running for 75s
% 0.37/0.93  % /export/starexec/sandbox/solver/bin/fo/fo7.sh running for 63s
% 0.37/0.96  % /export/starexec/sandbox/solver/bin/fo/fo13.sh running for 50s
% 0.37/0.98  % /export/starexec/sandbox/solver/bin/fo/fo4.sh running for 50s
% 0.37/0.99  % /export/starexec/sandbox/solver/bin/fo/fo5.sh running for 50s
% 1.82/1.20  % /export/starexec/sandbox/solver/bin/fo/fo1_lcnf.sh running for 50s
% 4.82/2.07  % Solved by fo/fo5.sh.
% 4.82/2.07  % done 1086 iterations in 0.949s
% 4.82/2.07  % SZS status Theorem for '/export/starexec/sandbox/benchmark/theBenchmark.p'
% 4.82/2.07  % SZS output start Refutation
% 4.82/2.07  thf(universal_class_type, type, universal_class: $i).
% 4.82/2.07  thf(null_class_type, type, null_class: $i).
% 4.82/2.07  thf(member_type, type, member: $i > $i > $o).
% 4.82/2.07  thf(x_type, type, x: $i).
% 4.82/2.07  thf(unordered_pair_type, type, unordered_pair: $i > $i > $i).
% 4.82/2.07  thf(complement_type, type, complement: $i > $i).
% 4.82/2.07  thf(singleton_type, type, singleton: $i > $i).
% 4.82/2.07  thf(intersection_type, type, intersection: $i > $i > $i).
% 4.82/2.07  thf(subclass_type, type, subclass: $i > $i > $o).
% 4.82/2.07  thf(ordered_pair_type, type, ordered_pair: $i > $i > $i).
% 4.82/2.07  thf(regular_type, type, regular: $i > $i).
% 4.82/2.07  thf(singleton_set, axiom, (( unordered_pair @ X @ X ) = ( singleton @ X ))).
% 4.82/2.07  thf(zip_derived_cl11, plain,
% 4.82/2.07      (![X0 : $i]: ((unordered_pair @ X0 @ X0) = (singleton @ X0))),
% 4.82/2.07      inference('cnf', [status(esa)], [singleton_set])).
% 4.82/2.07  thf(zip_derived_cl11, plain,
% 4.82/2.07      (![X0 : $i]: ((unordered_pair @ X0 @ X0) = (singleton @ X0))),
% 4.82/2.07      inference('cnf', [status(esa)], [singleton_set])).
% 4.82/2.07  thf(regularity1, axiom,
% 4.82/2.07    (( ( X ) = ( null_class ) ) | ( member @ ( regular @ X ) @ X ))).
% 4.82/2.07  thf(zip_derived_cl65, plain,
% 4.82/2.07      (![X0 : $i]: (((X0) = (null_class)) |  (member @ (regular @ X0) @ X0))),
% 4.82/2.07      inference('cnf', [status(esa)], [regularity1])).
% 4.82/2.07  thf(zip_derived_cl11, plain,
% 4.82/2.07      (![X0 : $i]: ((unordered_pair @ X0 @ X0) = (singleton @ X0))),
% 4.82/2.07      inference('cnf', [status(esa)], [singleton_set])).
% 4.82/2.07  thf(zip_derived_cl11, plain,
% 4.82/2.07      (![X0 : $i]: ((unordered_pair @ X0 @ X0) = (singleton @ X0))),
% 4.82/2.07      inference('cnf', [status(esa)], [singleton_set])).
% 4.82/2.07  thf(unordered_pair_member, axiom,
% 4.82/2.07    (( ~( member @ U @ ( unordered_pair @ X @ Y ) ) ) | ( ( U ) = ( X ) ) | 
% 4.82/2.07     ( ( U ) = ( Y ) ))).
% 4.82/2.07  thf(zip_derived_cl7, plain,
% 4.82/2.07      (![X0 : $i, X1 : $i, X2 : $i]:
% 4.82/2.07         (~ (member @ X0 @ (unordered_pair @ X1 @ X2))
% 4.82/2.07          | ((X0) = (X1))
% 4.82/2.07          | ((X0) = (X2)))),
% 4.82/2.07      inference('cnf', [status(esa)], [unordered_pair_member])).
% 4.82/2.07  thf(zip_derived_cl231, plain,
% 4.82/2.07      (![X0 : $i, X1 : $i]:
% 4.82/2.07         (~ (member @ X1 @ (singleton @ X0)) | ((X1) = (X0)) | ((X1) = (X0)))),
% 4.82/2.07      inference('sup-', [status(thm)], [zip_derived_cl11, zip_derived_cl7])).
% 4.82/2.07  thf(zip_derived_cl232, plain,
% 4.82/2.07      (![X0 : $i, X1 : $i]:
% 4.82/2.07         (((X1) = (X0)) | ~ (member @ X1 @ (singleton @ X0)))),
% 4.82/2.07      inference('simplify', [status(thm)], [zip_derived_cl231])).
% 4.82/2.07  thf(zip_derived_cl238, plain,
% 4.82/2.07      (![X0 : $i, X1 : $i]:
% 4.82/2.07         (~ (member @ X1 @ (unordered_pair @ X0 @ X0)) | ((X1) = (X0)))),
% 4.82/2.07      inference('sup-', [status(thm)], [zip_derived_cl11, zip_derived_cl232])).
% 4.82/2.07  thf(zip_derived_cl265, plain,
% 4.82/2.07      (![X0 : $i]:
% 4.82/2.07         (((unordered_pair @ X0 @ X0) = (null_class))
% 4.82/2.07          | ((regular @ (unordered_pair @ X0 @ X0)) = (X0)))),
% 4.82/2.07      inference('sup-', [status(thm)], [zip_derived_cl65, zip_derived_cl238])).
% 4.82/2.07  thf(zip_derived_cl65, plain,
% 4.82/2.07      (![X0 : $i]: (((X0) = (null_class)) |  (member @ (regular @ X0) @ X0))),
% 4.82/2.07      inference('cnf', [status(esa)], [regularity1])).
% 4.82/2.07  thf(class_elements_are_sets, axiom, (subclass @ X @ universal_class)).
% 4.82/2.07  thf(zip_derived_cl3, plain, (![X0 : $i]:  (subclass @ X0 @ universal_class)),
% 4.82/2.07      inference('cnf', [status(esa)], [class_elements_are_sets])).
% 4.82/2.07  thf(subclass_members, axiom,
% 4.82/2.07    (( ~( subclass @ X @ Y ) ) | ( ~( member @ U @ X ) ) | ( member @ U @ Y ))).
% 4.82/2.07  thf(zip_derived_cl0, plain,
% 4.82/2.07      (![X0 : $i, X1 : $i, X2 : $i]:
% 4.82/2.07         (~ (subclass @ X0 @ X1) | ~ (member @ X2 @ X0) |  (member @ X2 @ X1))),
% 4.82/2.07      inference('cnf', [status(esa)], [subclass_members])).
% 4.82/2.07  thf(zip_derived_cl114, plain,
% 4.82/2.07      (![X0 : $i, X1 : $i]:
% 4.82/2.07         ( (member @ X1 @ universal_class) | ~ (member @ X1 @ X0))),
% 4.82/2.07      inference('sup-', [status(thm)], [zip_derived_cl3, zip_derived_cl0])).
% 4.82/2.07  thf(zip_derived_cl127, plain,
% 4.82/2.07      (![X0 : $i]:
% 4.82/2.07         (((X0) = (null_class)) |  (member @ (regular @ X0) @ universal_class))),
% 4.82/2.07      inference('sup-', [status(thm)], [zip_derived_cl65, zip_derived_cl114])).
% 4.82/2.07  thf(zip_derived_cl1443, plain,
% 4.82/2.07      (![X0 : $i]:
% 4.82/2.07         ( (member @ X0 @ universal_class)
% 4.82/2.07          | ((unordered_pair @ X0 @ X0) = (null_class))
% 4.82/2.07          | ((unordered_pair @ X0 @ X0) = (null_class)))),
% 4.82/2.07      inference('sup+', [status(thm)], [zip_derived_cl265, zip_derived_cl127])).
% 4.82/2.07  thf(zip_derived_cl1449, plain,
% 4.82/2.07      (![X0 : $i]:
% 4.82/2.07         (((unordered_pair @ X0 @ X0) = (null_class))
% 4.82/2.07          |  (member @ X0 @ universal_class))),
% 4.82/2.07      inference('simplify', [status(thm)], [zip_derived_cl1443])).
% 4.82/2.07  thf(prove_corollary_1_to_property_1_of_ordered_pair_1, conjecture,
% 4.82/2.07    (( unordered_pair @ ( singleton @ x ) @ ( unordered_pair @ x @ null_class ) ) =
% 4.82/2.07     ( ordered_pair @ x @ universal_class ))).
% 4.82/2.07  thf(zf_stmt_0, negated_conjecture,
% 4.82/2.07    (( unordered_pair @ ( singleton @ x ) @ ( unordered_pair @ x @ null_class ) ) !=
% 4.82/2.07     ( ordered_pair @ x @ universal_class )),
% 4.82/2.07    inference('cnf.neg', [status(esa)],
% 4.82/2.07              [prove_corollary_1_to_property_1_of_ordered_pair_1])).
% 4.82/2.07  thf(zip_derived_cl112, plain,
% 4.82/2.07      (((unordered_pair @ (singleton @ x) @ (unordered_pair @ x @ null_class))
% 4.82/2.07         != (ordered_pair @ x @ universal_class))),
% 4.82/2.07      inference('cnf', [status(esa)], [zf_stmt_0])).
% 4.82/2.07  thf(zip_derived_cl2609, plain,
% 4.82/2.07      (![X0 : $i]:
% 4.82/2.07         (((unordered_pair @ (singleton @ x) @ 
% 4.82/2.07            (unordered_pair @ x @ (unordered_pair @ X0 @ X0)))
% 4.82/2.07            != (ordered_pair @ x @ universal_class))
% 4.82/2.07          |  (member @ X0 @ universal_class))),
% 4.82/2.07      inference('sup-', [status(thm)], [zip_derived_cl1449, zip_derived_cl112])).
% 4.82/2.07  thf(zip_derived_cl2880, plain,
% 4.82/2.07      (![X0 : $i]:
% 4.82/2.07         (((unordered_pair @ (singleton @ x) @ 
% 4.82/2.07            (unordered_pair @ x @ (singleton @ X0)))
% 4.82/2.07            != (ordered_pair @ x @ universal_class))
% 4.82/2.07          |  (member @ X0 @ universal_class))),
% 4.82/2.07      inference('sup-', [status(thm)], [zip_derived_cl11, zip_derived_cl2609])).
% 4.82/2.07  thf(ordered_pair, axiom,
% 4.82/2.07    (( unordered_pair @
% 4.82/2.07       ( singleton @ X ) @ ( unordered_pair @ X @ ( singleton @ Y ) ) ) =
% 4.82/2.07     ( ordered_pair @ X @ Y ))).
% 4.82/2.07  thf(zip_derived_cl12, plain,
% 4.82/2.07      (![X0 : $i, X1 : $i]:
% 4.82/2.07         ((unordered_pair @ (singleton @ X0) @ 
% 4.82/2.07           (unordered_pair @ X0 @ (singleton @ X1))) = (ordered_pair @ X0 @ X1))),
% 4.82/2.07      inference('cnf', [status(esa)], [ordered_pair])).
% 4.82/2.07  thf(zip_derived_cl2883, plain,
% 4.82/2.07      (![X0 : $i]:
% 4.82/2.07         (((ordered_pair @ x @ X0) != (ordered_pair @ x @ universal_class))
% 4.82/2.07          |  (member @ X0 @ universal_class))),
% 4.82/2.07      inference('demod', [status(thm)], [zip_derived_cl2880, zip_derived_cl12])).
% 4.82/2.07  thf(zip_derived_cl2885, plain,
% 4.82/2.07      ( (member @ universal_class @ universal_class)),
% 4.82/2.07      inference('eq_res', [status(thm)], [zip_derived_cl2883])).
% 4.82/2.07  thf(unordered_pair2, axiom,
% 4.82/2.07    (( ~( member @ X @ universal_class ) ) | 
% 4.82/2.07     ( member @ X @ ( unordered_pair @ X @ Y ) ))).
% 4.82/2.07  thf(zip_derived_cl8, plain,
% 4.82/2.07      (![X0 : $i, X1 : $i]:
% 4.82/2.07         (~ (member @ X0 @ universal_class)
% 4.82/2.07          |  (member @ X0 @ (unordered_pair @ X0 @ X1)))),
% 4.82/2.07      inference('cnf', [status(esa)], [unordered_pair2])).
% 4.82/2.07  thf(zip_derived_cl2891, plain,
% 4.82/2.07      (![X0 : $i]:
% 4.82/2.07          (member @ universal_class @ (unordered_pair @ universal_class @ X0))),
% 4.82/2.07      inference('sup-', [status(thm)], [zip_derived_cl2885, zip_derived_cl8])).
% 4.82/2.07  thf(zip_derived_cl3015, plain,
% 4.82/2.07      ( (member @ universal_class @ (singleton @ universal_class))),
% 4.82/2.07      inference('sup+', [status(thm)], [zip_derived_cl11, zip_derived_cl2891])).
% 4.82/2.07  thf(zip_derived_cl65, plain,
% 4.82/2.07      (![X0 : $i]: (((X0) = (null_class)) |  (member @ (regular @ X0) @ X0))),
% 4.82/2.07      inference('cnf', [status(esa)], [regularity1])).
% 4.82/2.07  thf(zip_derived_cl232, plain,
% 4.82/2.07      (![X0 : $i, X1 : $i]:
% 4.82/2.07         (((X1) = (X0)) | ~ (member @ X1 @ (singleton @ X0)))),
% 4.82/2.07      inference('simplify', [status(thm)], [zip_derived_cl231])).
% 4.82/2.07  thf(zip_derived_cl237, plain,
% 4.82/2.07      (![X0 : $i]:
% 4.82/2.07         (((singleton @ X0) = (null_class))
% 4.82/2.07          | ((regular @ (singleton @ X0)) = (X0)))),
% 4.82/2.07      inference('sup-', [status(thm)], [zip_derived_cl65, zip_derived_cl232])).
% 4.82/2.07  thf(regularity2, axiom,
% 4.82/2.07    (( ( X ) = ( null_class ) ) | 
% 4.82/2.07     ( ( intersection @ X @ ( regular @ X ) ) = ( null_class ) ))).
% 4.82/2.07  thf(zip_derived_cl66, plain,
% 4.82/2.07      (![X0 : $i]:
% 4.82/2.07         (((X0) = (null_class))
% 4.82/2.07          | ((intersection @ X0 @ (regular @ X0)) = (null_class)))),
% 4.82/2.07      inference('cnf', [status(esa)], [regularity2])).
% 4.82/2.07  thf(zip_derived_cl390, plain,
% 4.82/2.07      (![X0 : $i]:
% 4.82/2.07         (((intersection @ (singleton @ X0) @ X0) = (null_class))
% 4.82/2.07          | ((singleton @ X0) = (null_class))
% 4.82/2.07          | ((singleton @ X0) = (null_class)))),
% 4.82/2.07      inference('sup+', [status(thm)], [zip_derived_cl237, zip_derived_cl66])).
% 4.82/2.07  thf(zip_derived_cl394, plain,
% 4.82/2.07      (![X0 : $i]:
% 4.82/2.07         (((singleton @ X0) = (null_class))
% 4.82/2.07          | ((intersection @ (singleton @ X0) @ X0) = (null_class)))),
% 4.82/2.07      inference('simplify', [status(thm)], [zip_derived_cl390])).
% 4.82/2.07  thf(zip_derived_cl2885, plain,
% 4.82/2.07      ( (member @ universal_class @ universal_class)),
% 4.82/2.07      inference('eq_res', [status(thm)], [zip_derived_cl2883])).
% 4.82/2.07  thf(zip_derived_cl3015, plain,
% 4.82/2.07      ( (member @ universal_class @ (singleton @ universal_class))),
% 4.82/2.07      inference('sup+', [status(thm)], [zip_derived_cl11, zip_derived_cl2891])).
% 4.82/2.07  thf(intersection3, axiom,
% 4.82/2.07    (( ~( member @ Z @ X ) ) | ( ~( member @ Z @ Y ) ) | 
% 4.82/2.07     ( member @ Z @ ( intersection @ X @ Y ) ))).
% 4.82/2.07  thf(zip_derived_cl22, plain,
% 4.82/2.07      (![X0 : $i, X1 : $i, X2 : $i]:
% 4.82/2.07         (~ (member @ X0 @ X1)
% 4.82/2.07          | ~ (member @ X0 @ X2)
% 4.82/2.07          |  (member @ X0 @ (intersection @ X1 @ X2)))),
% 4.82/2.07      inference('cnf', [status(esa)], [intersection3])).
% 4.82/2.07  thf(zip_derived_cl3055, plain,
% 4.82/2.07      (![X0 : $i]:
% 4.82/2.07         ( (member @ universal_class @ 
% 4.82/2.07            (intersection @ (singleton @ universal_class) @ X0))
% 4.82/2.07          | ~ (member @ universal_class @ X0))),
% 4.82/2.07      inference('sup-', [status(thm)], [zip_derived_cl3015, zip_derived_cl22])).
% 4.82/2.07  thf(zip_derived_cl3827, plain,
% 4.82/2.07      ( (member @ universal_class @ 
% 4.82/2.07         (intersection @ (singleton @ universal_class) @ universal_class))),
% 4.82/2.07      inference('sup-', [status(thm)], [zip_derived_cl2885, zip_derived_cl3055])).
% 4.82/2.07  thf(zip_derived_cl3844, plain,
% 4.82/2.07      (( (member @ universal_class @ null_class)
% 4.82/2.07        | ((singleton @ universal_class) = (null_class)))),
% 4.82/2.07      inference('sup+', [status(thm)], [zip_derived_cl394, zip_derived_cl3827])).
% 4.82/2.07  thf(zip_derived_cl127, plain,
% 4.82/2.07      (![X0 : $i]:
% 4.82/2.07         (((X0) = (null_class)) |  (member @ (regular @ X0) @ universal_class))),
% 4.82/2.07      inference('sup-', [status(thm)], [zip_derived_cl65, zip_derived_cl114])).
% 4.82/2.07  thf(zip_derived_cl65, plain,
% 4.82/2.07      (![X0 : $i]: (((X0) = (null_class)) |  (member @ (regular @ X0) @ X0))),
% 4.82/2.07      inference('cnf', [status(esa)], [regularity1])).
% 4.82/2.07  thf(complement1, axiom,
% 4.82/2.07    (( ~( member @ Z @ ( complement @ X ) ) ) | ( ~( member @ Z @ X ) ))).
% 4.82/2.07  thf(zip_derived_cl23, plain,
% 4.82/2.07      (![X0 : $i, X1 : $i]:
% 4.82/2.07         (~ (member @ X0 @ (complement @ X1)) | ~ (member @ X0 @ X1))),
% 4.82/2.07      inference('cnf', [status(esa)], [complement1])).
% 4.82/2.07  thf(zip_derived_cl158, plain,
% 4.82/2.07      (![X0 : $i]:
% 4.82/2.07         (((complement @ X0) = (null_class))
% 4.82/2.07          | ~ (member @ (regular @ (complement @ X0)) @ X0))),
% 4.82/2.07      inference('sup-', [status(thm)], [zip_derived_cl65, zip_derived_cl23])).
% 4.82/2.07  thf(zip_derived_cl837, plain,
% 4.82/2.07      ((((complement @ universal_class) = (null_class))
% 4.82/2.07        | ((complement @ universal_class) = (null_class)))),
% 4.82/2.07      inference('sup-', [status(thm)], [zip_derived_cl127, zip_derived_cl158])).
% 4.82/2.07  thf(zip_derived_cl841, plain,
% 4.82/2.07      (((complement @ universal_class) = (null_class))),
% 4.82/2.07      inference('simplify', [status(thm)], [zip_derived_cl837])).
% 4.82/2.07  thf(zip_derived_cl23, plain,
% 4.82/2.07      (![X0 : $i, X1 : $i]:
% 4.82/2.07         (~ (member @ X0 @ (complement @ X1)) | ~ (member @ X0 @ X1))),
% 4.82/2.07      inference('cnf', [status(esa)], [complement1])).
% 4.82/2.07  thf(zip_derived_cl845, plain,
% 4.82/2.07      (![X0 : $i]:
% 4.82/2.07         (~ (member @ X0 @ null_class) | ~ (member @ X0 @ universal_class))),
% 4.82/2.07      inference('sup-', [status(thm)], [zip_derived_cl841, zip_derived_cl23])).
% 4.82/2.07  thf(zip_derived_cl114, plain,
% 4.82/2.07      (![X0 : $i, X1 : $i]:
% 4.82/2.07         ( (member @ X1 @ universal_class) | ~ (member @ X1 @ X0))),
% 4.82/2.07      inference('sup-', [status(thm)], [zip_derived_cl3, zip_derived_cl0])).
% 4.82/2.07  thf(zip_derived_cl856, plain, (![X0 : $i]: ~ (member @ X0 @ null_class)),
% 4.82/2.07      inference('clc', [status(thm)], [zip_derived_cl845, zip_derived_cl114])).
% 4.82/2.07  thf(zip_derived_cl3845, plain,
% 4.82/2.07      (((singleton @ universal_class) = (null_class))),
% 4.82/2.07      inference('clc', [status(thm)], [zip_derived_cl3844, zip_derived_cl856])).
% 4.82/2.07  thf(zip_derived_cl856, plain, (![X0 : $i]: ~ (member @ X0 @ null_class)),
% 4.82/2.07      inference('clc', [status(thm)], [zip_derived_cl845, zip_derived_cl114])).
% 4.82/2.07  thf(zip_derived_cl3847, plain, ($false),
% 4.82/2.07      inference('demod', [status(thm)],
% 4.82/2.07                [zip_derived_cl3015, zip_derived_cl3845, zip_derived_cl856])).
% 4.82/2.07  
% 4.82/2.07  % SZS output end Refutation
% 4.82/2.07  
% 4.82/2.07  
% 4.82/2.07  % Terminating...
% 5.31/2.23  % Runner terminated.
% 5.31/2.23  % Zipperpin 1.5 exiting
%------------------------------------------------------------------------------