%------------------------------------------------------------------------------
% File : Zipperpin---2.1.9999
% Problem : SET183-6 : TPTP v9.2.0. Bugfixed v2.1.0.
% Transfm : none
% Format : tptp:raw
% Command : python3 /export/starexec/sandbox2/solver/bin/portfolio.lams.parallel.py %s %d /export/starexec/sandbox2/tmp/tmp.kJktwTmDTe true
% Computer : n023.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 04:51:47 PM UTC 2025
% Result : Unsatisfiable 19.99s 3.49s
% Output : Refutation 19.99s
% Verified :
% SZS Type : -
% Comments :
%------------------------------------------------------------------------------
%----WARNING: Could not form TPTP format derivation
%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.06/0.14 % Problem : SET183-6 : TPTP v9.2.0. Bugfixed v2.1.0.
% 0.06/0.15 % Command : python3 /export/starexec/sandbox2/solver/bin/portfolio.lams.parallel.py %s %d /export/starexec/sandbox2/tmp/tmp.kJktwTmDTe true
% 0.14/0.37 % Computer : n023.cluster.edu
% 0.14/0.37 % Model : x86_64 x86_64
% 0.14/0.37 % CPU : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz
% 0.14/0.37 % Memory : 8042.1875MB
% 0.14/0.37 % OS : Linux 3.10.0-693.el7.x86_64
% 0.14/0.37 % CPULimit : 300
% 0.14/0.37 % WCLimit : 300
% 0.14/0.37 % DateTime : Wed Oct 1 12:58:53 EDT 2025
% 0.14/0.37 % CPUTime :
% 0.14/0.37 % Running portfolio for 300 s
% 0.14/0.37 % File : /export/starexec/sandbox2/benchmark/theBenchmark.p
% 0.14/0.37 % Number of cores: 8
% 0.14/0.38 % Python version: Python 3.6.8
% 0.14/0.38 % Running in FO mode
% 0.50/0.61 % Total configuration time : 435
% 0.50/0.61 % Estimated wc time : 1092
% 0.50/0.61 % Estimated cpu time (7 cpus) : 156.0
% 0.52/0.70 % /export/starexec/sandbox2/solver/bin/fo/fo6_bce.sh running for 75s
% 0.52/0.72 % /export/starexec/sandbox2/solver/bin/fo/fo3_bce.sh running for 75s
% 0.52/0.73 % /export/starexec/sandbox2/solver/bin/fo/fo7.sh running for 63s
% 0.52/0.74 % /export/starexec/sandbox2/solver/bin/fo/fo1_av.sh running for 75s
% 0.52/0.74 % /export/starexec/sandbox2/solver/bin/fo/fo13.sh running for 50s
% 0.52/0.74 % /export/starexec/sandbox2/solver/bin/fo/fo5.sh running for 50s
% 0.52/0.76 % /export/starexec/sandbox2/solver/bin/fo/fo4.sh running for 50s
% 0.53/0.82 % /export/starexec/sandbox2/solver/bin/fo/fo1_lcnf.sh running for 50s
% 19.99/3.49 % Solved by fo/fo1_lcnf.sh.
% 19.99/3.49 % done 1829 iterations in 2.634s
% 19.99/3.49 % SZS status Theorem for '/export/starexec/sandbox2/benchmark/theBenchmark.p'
% 19.99/3.49 % SZS output start Refutation
% 19.99/3.49 thf(member_type, type, member: $i > $i > $o).
% 19.99/3.49 thf(x_type, type, x: $i).
% 19.99/3.49 thf(intersection_type, type, intersection: $i > $i > $i).
% 19.99/3.49 thf(subclass_type, type, subclass: $i > $i > $o).
% 19.99/3.49 thf(y_type, type, y: $i).
% 19.99/3.49 thf(not_subclass_element_type, type, not_subclass_element: $i > $i > $i).
% 19.99/3.49 thf(not_subclass_members1, axiom,
% 19.99/3.49 (( member @ ( not_subclass_element @ X @ Y ) @ X ) | ( subclass @ X @ Y ))).
% 19.99/3.49 thf(zip_derived_cl1, plain,
% 19.99/3.49 (![X0 : $i, X1 : $i]:
% 19.99/3.49 (((member @ (not_subclass_element @ X0 @ X1) @ X0) | (subclass @
% 19.99/3.49 X0 @ X1)))),
% 19.99/3.49 inference('cnf', [status(esa)], [not_subclass_members1])).
% 19.99/3.49 thf(zip_derived_cl124, plain,
% 19.99/3.49 (![X0 : $i, X1 : $i]:
% 19.99/3.49 ( (member @ (not_subclass_element @ X0 @ X1) @ X0)
% 19.99/3.49 | (subclass @ X0 @ X1))),
% 19.99/3.49 inference('lazy_cnf_or', [status(thm)], [zip_derived_cl1])).
% 19.99/3.49 thf(intersection3, axiom,
% 19.99/3.49 (( ~( member @ Z @ X ) ) | ( ~( member @ Z @ Y ) ) |
% 19.99/3.49 ( member @ Z @ ( intersection @ X @ Y ) ))).
% 19.99/3.49 thf(zip_derived_cl22, plain,
% 19.99/3.49 (![X0 : $i, X1 : $i, X2 : $i]:
% 19.99/3.49 (((((~) @ (member @ X0 @ X1))) | (((~) @ (member @ X0 @ X2))) |
% 19.99/3.49 (member @ X0 @ (intersection @ X1 @ X2))))),
% 19.99/3.49 inference('cnf', [status(esa)], [intersection3])).
% 19.99/3.49 thf(zip_derived_cl449, plain,
% 19.99/3.49 (![X0 : $i, X1 : $i, X2 : $i]:
% 19.99/3.49 (~ (member @ X0 @ X1)
% 19.99/3.49 | ~ (member @ X0 @ X2)
% 19.99/3.49 | (member @ X0 @ (intersection @ X1 @ X2)))),
% 19.99/3.49 inference('lazy_cnf_or', [status(thm)], [zip_derived_cl22])).
% 19.99/3.49 thf(intersection1, axiom,
% 19.99/3.49 (( ~( member @ Z @ ( intersection @ X @ Y ) ) ) | ( member @ Z @ X ))).
% 19.99/3.49 thf(zip_derived_cl20, plain,
% 19.99/3.49 (![X0 : $i, X1 : $i, X2 : $i]:
% 19.99/3.49 (((((~) @ (member @ X0 @ (intersection @ X1 @ X2)))) | (member @
% 19.99/3.49 X0 @ X1)))),
% 19.99/3.49 inference('cnf', [status(esa)], [intersection1])).
% 19.99/3.49 thf(zip_derived_cl262, plain,
% 19.99/3.49 (![X0 : $i, X1 : $i, X2 : $i]:
% 19.99/3.49 (~ (member @ X0 @ (intersection @ X1 @ X2)) | (member @ X0 @ X1))),
% 19.99/3.49 inference('lazy_cnf_or', [status(thm)], [zip_derived_cl20])).
% 19.99/3.49 thf(zip_derived_cl124, plain,
% 19.99/3.49 (![X0 : $i, X1 : $i]:
% 19.99/3.49 ( (member @ (not_subclass_element @ X0 @ X1) @ X0)
% 19.99/3.49 | (subclass @ X0 @ X1))),
% 19.99/3.49 inference('lazy_cnf_or', [status(thm)], [zip_derived_cl1])).
% 19.99/3.49 thf(zip_derived_cl263, plain,
% 19.99/3.49 (![X0 : $i, X1 : $i, X2 : $i]:
% 19.99/3.49 ( (member @ (not_subclass_element @ (intersection @ X1 @ X0) @ X2) @
% 19.99/3.49 X1)
% 19.99/3.49 | (subclass @ (intersection @ X1 @ X0) @ X2))),
% 19.99/3.49 inference('s_sup+', [status(thm)], [zip_derived_cl262, zip_derived_cl124])).
% 19.99/3.49 thf(zip_derived_cl263, plain,
% 19.99/3.49 (![X0 : $i, X1 : $i, X2 : $i]:
% 19.99/3.49 ( (member @ (not_subclass_element @ (intersection @ X1 @ X0) @ X2) @
% 19.99/3.49 X1)
% 19.99/3.49 | (subclass @ (intersection @ X1 @ X0) @ X2))),
% 19.99/3.49 inference('s_sup+', [status(thm)], [zip_derived_cl262, zip_derived_cl124])).
% 19.99/3.49 thf(not_subclass_members2, axiom,
% 19.99/3.49 (( ~( member @ ( not_subclass_element @ X @ Y ) @ Y ) ) |
% 19.99/3.49 ( subclass @ X @ Y ))).
% 19.99/3.49 thf(zip_derived_cl2, plain,
% 19.99/3.49 (![X0 : $i, X1 : $i]:
% 19.99/3.49 (((((~) @ (member @ (not_subclass_element @ X0 @ X1) @ X1))) |
% 19.99/3.49 (subclass @ X0 @ X1)))),
% 19.99/3.49 inference('cnf', [status(esa)], [not_subclass_members2])).
% 19.99/3.49 thf(zip_derived_cl136, plain,
% 19.99/3.49 (![X0 : $i, X1 : $i]:
% 19.99/3.49 (~ (member @ (not_subclass_element @ X0 @ X1) @ X1)
% 19.99/3.49 | (subclass @ X0 @ X1))),
% 19.99/3.49 inference('lazy_cnf_or', [status(thm)], [zip_derived_cl2])).
% 19.99/3.49 thf(prove_subclass_property1_1, conjecture, (~( subclass @ x @ y ))).
% 19.99/3.49 thf(zf_stmt_0, negated_conjecture, (subclass @ x @ y),
% 19.99/3.49 inference('cnf.neg', [status(esa)], [prove_subclass_property1_1])).
% 19.99/3.49 thf(zip_derived_cl112, plain, ( (subclass @ x @ y)),
% 19.99/3.49 inference('cnf', [status(esa)], [zf_stmt_0])).
% 19.99/3.49 thf(subclass_members, axiom,
% 19.99/3.49 (( ~( subclass @ X @ Y ) ) | ( ~( member @ U @ X ) ) | ( member @ U @ Y ))).
% 19.99/3.49 thf(zip_derived_cl0, plain,
% 19.99/3.49 (![X0 : $i, X1 : $i, X2 : $i]:
% 19.99/3.49 (((((~) @ (subclass @ X0 @ X1))) | (((~) @ (member @ X2 @ X0))) |
% 19.99/3.49 (member @ X2 @ X1)))),
% 19.99/3.49 inference('cnf', [status(esa)], [subclass_members])).
% 19.99/3.49 thf(zip_derived_cl114, plain,
% 19.99/3.49 (![X0 : $i, X1 : $i, X2 : $i]:
% 19.99/3.49 (~ (subclass @ X0 @ X1) | ~ (member @ X2 @ X0) | (member @ X2 @ X1))),
% 19.99/3.49 inference('lazy_cnf_or', [status(thm)], [zip_derived_cl0])).
% 19.99/3.49 thf(zip_derived_cl116, plain,
% 19.99/3.49 (![X0 : $i]: (~ (member @ X0 @ x) | (member @ X0 @ y))),
% 19.99/3.49 inference('s_sup-', [status(thm)], [zip_derived_cl112, zip_derived_cl114])).
% 19.99/3.49 thf(zip_derived_cl137, plain,
% 19.99/3.49 (![X0 : $i]:
% 19.99/3.49 ( (subclass @ X0 @ y)
% 19.99/3.49 | ~ (member @ (not_subclass_element @ X0 @ y) @ x))),
% 19.99/3.49 inference('s_sup+', [status(thm)], [zip_derived_cl136, zip_derived_cl116])).
% 19.99/3.49 thf(zip_derived_cl2033, plain,
% 19.99/3.49 (![X0 : $i]:
% 19.99/3.49 ( (subclass @ (intersection @ x @ X0) @ y)
% 19.99/3.49 | (subclass @ (intersection @ x @ X0) @ y))),
% 19.99/3.49 inference('s_sup-', [status(thm)], [zip_derived_cl263, zip_derived_cl137])).
% 19.99/3.49 thf(zip_derived_cl2056, plain,
% 19.99/3.49 (![X0 : $i]: (subclass @ (intersection @ x @ X0) @ y)),
% 19.99/3.49 inference('simplify', [status(thm)], [zip_derived_cl2033])).
% 19.99/3.49 thf(zip_derived_cl114, plain,
% 19.99/3.49 (![X0 : $i, X1 : $i, X2 : $i]:
% 19.99/3.49 (~ (subclass @ X0 @ X1) | ~ (member @ X2 @ X0) | (member @ X2 @ X1))),
% 19.99/3.49 inference('lazy_cnf_or', [status(thm)], [zip_derived_cl0])).
% 19.99/3.49 thf(zip_derived_cl2057, plain,
% 19.99/3.49 (![X0 : $i, X1 : $i]:
% 19.99/3.49 (~ (member @ X1 @ (intersection @ x @ X0)) | (member @ X1 @ y))),
% 19.99/3.49 inference('s_sup-', [status(thm)],
% 19.99/3.49 [zip_derived_cl2056, zip_derived_cl114])).
% 19.99/3.49 thf(zip_derived_cl124, plain,
% 19.99/3.49 (![X0 : $i, X1 : $i]:
% 19.99/3.49 ( (member @ (not_subclass_element @ X0 @ X1) @ X0)
% 19.99/3.49 | (subclass @ X0 @ X1))),
% 19.99/3.49 inference('lazy_cnf_or', [status(thm)], [zip_derived_cl1])).
% 19.99/3.49 thf(zip_derived_cl2063, plain,
% 19.99/3.49 (![X0 : $i, X1 : $i]:
% 19.99/3.49 ( (member @ (not_subclass_element @ (intersection @ x @ X0) @ X1) @ y)
% 19.99/3.49 | (subclass @ (intersection @ x @ X0) @ X1))),
% 19.99/3.49 inference('s_sup+', [status(thm)],
% 19.99/3.49 [zip_derived_cl2057, zip_derived_cl124])).
% 19.99/3.49 thf(zip_derived_cl449, plain,
% 19.99/3.49 (![X0 : $i, X1 : $i, X2 : $i]:
% 19.99/3.49 (~ (member @ X0 @ X1)
% 19.99/3.49 | ~ (member @ X0 @ X2)
% 19.99/3.49 | (member @ X0 @ (intersection @ X1 @ X2)))),
% 19.99/3.49 inference('lazy_cnf_or', [status(thm)], [zip_derived_cl22])).
% 19.99/3.49 thf(zip_derived_cl136, plain,
% 19.99/3.49 (![X0 : $i, X1 : $i]:
% 19.99/3.49 (~ (member @ (not_subclass_element @ X0 @ X1) @ X1)
% 19.99/3.49 | (subclass @ X0 @ X1))),
% 19.99/3.49 inference('lazy_cnf_or', [status(thm)], [zip_derived_cl2])).
% 19.99/3.49 thf(zip_derived_cl453, plain,
% 19.99/3.49 (![X0 : $i, X1 : $i, X2 : $i]:
% 19.99/3.49 (~ (member @ (not_subclass_element @ X2 @ (intersection @ X1 @ X0)) @
% 19.99/3.49 X0)
% 19.99/3.49 | ~ (member @
% 19.99/3.49 (not_subclass_element @ X2 @ (intersection @ X1 @ X0)) @ X1)
% 19.99/3.49 | (subclass @ X2 @ (intersection @ X1 @ X0)))),
% 19.99/3.49 inference('s_sup-', [status(thm)], [zip_derived_cl449, zip_derived_cl136])).
% 19.99/3.49 thf(zip_derived_cl5396, plain,
% 19.99/3.49 (![X0 : $i, X1 : $i]:
% 19.99/3.49 ( (subclass @ (intersection @ x @ X1) @ (intersection @ X0 @ y))
% 19.99/3.49 | ~ (member @
% 19.99/3.49 (not_subclass_element @ (intersection @ x @ X1) @
% 19.99/3.49 (intersection @ X0 @ y)) @
% 19.99/3.49 X0)
% 19.99/3.49 | (subclass @ (intersection @ x @ X1) @ (intersection @ X0 @ y)))),
% 19.99/3.49 inference('s_sup-', [status(thm)],
% 19.99/3.49 [zip_derived_cl2063, zip_derived_cl453])).
% 19.99/3.49 thf(zip_derived_cl5428, plain,
% 19.99/3.49 (![X0 : $i, X1 : $i]:
% 19.99/3.49 (~ (member @
% 19.99/3.49 (not_subclass_element @ (intersection @ x @ X1) @
% 19.99/3.49 (intersection @ X0 @ y)) @
% 19.99/3.49 X0)
% 19.99/3.49 | (subclass @ (intersection @ x @ X1) @ (intersection @ X0 @ y)))),
% 19.99/3.49 inference('simplify', [status(thm)], [zip_derived_cl5396])).
% 19.99/3.49 thf(zip_derived_cl7210, plain,
% 19.99/3.49 (![X0 : $i]:
% 19.99/3.49 ( (subclass @ (intersection @ x @ X0) @ (intersection @ x @ y))
% 19.99/3.49 | (subclass @ (intersection @ x @ X0) @ (intersection @ x @ y)))),
% 19.99/3.49 inference('s_sup-', [status(thm)],
% 19.99/3.49 [zip_derived_cl263, zip_derived_cl5428])).
% 19.99/3.49 thf(zip_derived_cl7230, plain,
% 19.99/3.49 (![X0 : $i]:
% 19.99/3.49 (subclass @ (intersection @ x @ X0) @ (intersection @ x @ y))),
% 19.99/3.49 inference('simplify', [status(thm)], [zip_derived_cl7210])).
% 19.99/3.49 thf(zip_derived_cl114, plain,
% 19.99/3.49 (![X0 : $i, X1 : $i, X2 : $i]:
% 19.99/3.49 (~ (subclass @ X0 @ X1) | ~ (member @ X2 @ X0) | (member @ X2 @ X1))),
% 19.99/3.49 inference('lazy_cnf_or', [status(thm)], [zip_derived_cl0])).
% 19.99/3.49 thf(zip_derived_cl7295, plain,
% 19.99/3.49 (![X0 : $i, X1 : $i]:
% 19.99/3.49 (~ (member @ X1 @ (intersection @ x @ X0))
% 19.99/3.49 | (member @ X1 @ (intersection @ x @ y)))),
% 19.99/3.49 inference('s_sup-', [status(thm)],
% 19.99/3.49 [zip_derived_cl7230, zip_derived_cl114])).
% 19.99/3.49 thf(zip_derived_cl7342, plain,
% 19.99/3.49 (![X0 : $i, X1 : $i]:
% 19.99/3.49 (~ (member @ X1 @ X0)
% 19.99/3.49 | ~ (member @ X1 @ x)
% 19.99/3.49 | (member @ X1 @ (intersection @ x @ y)))),
% 19.99/3.49 inference('s_sup-', [status(thm)],
% 19.99/3.49 [zip_derived_cl449, zip_derived_cl7295])).
% 19.99/3.49 thf(zip_derived_cl7366, plain,
% 19.99/3.49 (![X0 : $i]:
% 19.99/3.49 ( (member @ X0 @ (intersection @ x @ y)) | ~ (member @ X0 @ x))),
% 19.99/3.49 inference('condensation', [status(thm)], [zip_derived_cl7342])).
% 19.99/3.49 thf(zip_derived_cl136, plain,
% 19.99/3.49 (![X0 : $i, X1 : $i]:
% 19.99/3.49 (~ (member @ (not_subclass_element @ X0 @ X1) @ X1)
% 19.99/3.49 | (subclass @ X0 @ X1))),
% 19.99/3.49 inference('lazy_cnf_or', [status(thm)], [zip_derived_cl2])).
% 19.99/3.49 thf(zip_derived_cl7375, plain,
% 19.99/3.49 (![X0 : $i]:
% 19.99/3.49 (~ (member @ (not_subclass_element @ X0 @ (intersection @ x @ y)) @ x)
% 19.99/3.49 | (subclass @ X0 @ (intersection @ x @ y)))),
% 19.99/3.49 inference('s_sup-', [status(thm)],
% 19.99/3.49 [zip_derived_cl7366, zip_derived_cl136])).
% 19.99/3.49 thf(zip_derived_cl8781, plain,
% 19.99/3.49 (( (subclass @ x @ (intersection @ x @ y))
% 19.99/3.49 | (subclass @ x @ (intersection @ x @ y)))),
% 19.99/3.49 inference('s_sup-', [status(thm)],
% 19.99/3.49 [zip_derived_cl124, zip_derived_cl7375])).
% 19.99/3.49 thf(zip_derived_cl8784, plain, ( (subclass @ x @ (intersection @ x @ y))),
% 19.99/3.49 inference('simplify', [status(thm)], [zip_derived_cl8781])).
% 19.99/3.49 thf(subclass_implies_equal, axiom,
% 19.99/3.49 (( ~( subclass @ X @ Y ) ) | ( ~( subclass @ Y @ X ) ) | ( ( X ) = ( Y ) ))).
% 19.99/3.49 thf(zip_derived_cl6, plain,
% 19.99/3.49 (![X0 : $i, X1 : $i]:
% 19.99/3.49 (((((~) @ (subclass @ X0 @ X1))) | (((~) @ (subclass @ X1 @ X0))) |
% 19.99/3.49 (((X0) = (X1)))))),
% 19.99/3.49 inference('cnf', [status(esa)], [subclass_implies_equal])).
% 19.99/3.49 thf(zip_derived_cl153, plain,
% 19.99/3.49 (![X0 : $i, X1 : $i]:
% 19.99/3.49 (~ (subclass @ X0 @ X1) | ~ (subclass @ X1 @ X0) | (((X0) = (X1))))),
% 19.99/3.49 inference('lazy_cnf_or', [status(thm)], [zip_derived_cl6])).
% 19.99/3.49 thf(zip_derived_cl154, plain,
% 19.99/3.49 (![X0 : $i, X1 : $i]:
% 19.99/3.49 (~ (subclass @ X0 @ X1) | ~ (subclass @ X1 @ X0) | ((X0) = (X1)))),
% 19.99/3.49 inference('simplify nested equalities', [status(thm)],
% 19.99/3.49 [zip_derived_cl153])).
% 19.99/3.49 thf(zip_derived_cl8791, plain,
% 19.99/3.49 ((~ (subclass @ (intersection @ x @ y) @ x)
% 19.99/3.49 | ((x) = (intersection @ x @ y)))),
% 19.99/3.49 inference('s_sup-', [status(thm)],
% 19.99/3.49 [zip_derived_cl8784, zip_derived_cl154])).
% 19.99/3.49 thf(zip_derived_cl263, plain,
% 19.99/3.49 (![X0 : $i, X1 : $i, X2 : $i]:
% 19.99/3.49 ( (member @ (not_subclass_element @ (intersection @ X1 @ X0) @ X2) @
% 19.99/3.49 X1)
% 19.99/3.49 | (subclass @ (intersection @ X1 @ X0) @ X2))),
% 19.99/3.49 inference('s_sup+', [status(thm)], [zip_derived_cl262, zip_derived_cl124])).
% 19.99/3.49 thf(zip_derived_cl136, plain,
% 19.99/3.49 (![X0 : $i, X1 : $i]:
% 19.99/3.49 (~ (member @ (not_subclass_element @ X0 @ X1) @ X1)
% 19.99/3.49 | (subclass @ X0 @ X1))),
% 19.99/3.49 inference('lazy_cnf_or', [status(thm)], [zip_derived_cl2])).
% 19.99/3.49 thf(zip_derived_cl2031, plain,
% 19.99/3.49 (![X0 : $i, X1 : $i]:
% 19.99/3.49 ( (subclass @ (intersection @ X0 @ X1) @ X0)
% 19.99/3.49 | (subclass @ (intersection @ X0 @ X1) @ X0))),
% 19.99/3.49 inference('s_sup-', [status(thm)], [zip_derived_cl263, zip_derived_cl136])).
% 19.99/3.49 thf(zip_derived_cl2054, plain,
% 19.99/3.49 (![X0 : $i, X1 : $i]: (subclass @ (intersection @ X0 @ X1) @ X0)),
% 19.99/3.49 inference('simplify', [status(thm)], [zip_derived_cl2031])).
% 19.99/3.49 thf(zip_derived_cl8793, plain, (((x) = (intersection @ x @ y))),
% 19.99/3.49 inference('demod', [status(thm)],
% 19.99/3.49 [zip_derived_cl8791, zip_derived_cl2054])).
% 19.99/3.49 thf(prove_subclass_property1_2, conjecture,
% 19.99/3.49 (( intersection @ x @ y ) = ( x ))).
% 19.99/3.49 thf(zf_stmt_1, negated_conjecture, (( intersection @ x @ y ) != ( x )),
% 19.99/3.49 inference('cnf.neg', [status(esa)], [prove_subclass_property1_2])).
% 19.99/3.49 thf(zip_derived_cl113, plain, (((intersection @ x @ y) != (x))),
% 19.99/3.49 inference('cnf', [status(esa)], [zf_stmt_1])).
% 19.99/3.49 thf(zip_derived_cl8794, plain, ($false),
% 19.99/3.49 inference('simplify_reflect-', [status(thm)],
% 19.99/3.49 [zip_derived_cl8793, zip_derived_cl113])).
% 19.99/3.49
% 19.99/3.49 % SZS output end Refutation
% 19.99/3.49
% 19.99/3.49
% 19.99/3.49 % Terminating...
% 20.64/3.56 % Runner terminated.
% 20.64/3.57 % Zipperpin 1.5 exiting
%------------------------------------------------------------------------------