%------------------------------------------------------------------------------
% File : Zipperpin---2.1.9999
% Problem : HEN009-5 : TPTP v9.2.0. Bugfixed v1.2.1.
% Transfm : none
% Format : tptp:raw
% Command : python3 /export/starexec/sandbox/solver/bin/portfolio.lams.parallel.py %s %d /export/starexec/sandbox/tmp/tmp.QtcdY23gaj true
% Computer : n021.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 04:37:24 PM UTC 2025
% Result : Unsatisfiable 11.14s 2.17s
% Output : Refutation 11.14s
% Verified :
% SZS Type : -
% Comments :
%------------------------------------------------------------------------------
%----WARNING: Could not form TPTP format derivation
%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.05/0.10 % Problem : HEN009-5 : TPTP v9.2.0. Bugfixed v1.2.1.
% 0.05/0.11 % Command : python3 /export/starexec/sandbox/solver/bin/portfolio.lams.parallel.py %s %d /export/starexec/sandbox/tmp/tmp.QtcdY23gaj true
% 0.10/0.31 % Computer : n021.cluster.edu
% 0.10/0.31 % Model : x86_64 x86_64
% 0.10/0.31 % CPU : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz
% 0.10/0.31 % Memory : 8042.1875MB
% 0.10/0.31 % OS : Linux 3.10.0-693.el7.x86_64
% 0.10/0.31 % CPULimit : 300
% 0.10/0.31 % WCLimit : 300
% 0.10/0.31 % DateTime : Wed Oct 1 16:54:53 EDT 2025
% 0.10/0.31 % CPUTime :
% 0.10/0.31 % Running portfolio for 300 s
% 0.10/0.31 % File : /export/starexec/sandbox/benchmark/theBenchmark.p
% 0.10/0.31 % Number of cores: 8
% 0.10/0.31 % Python version: Python 3.6.8
% 0.10/0.32 % Running in FO mode
% 0.45/0.62 % Total configuration time : 435
% 0.45/0.62 % Estimated wc time : 1092
% 0.45/0.62 % Estimated cpu time (7 cpus) : 156.0
% 0.49/0.68 % /export/starexec/sandbox/solver/bin/fo/fo6_bce.sh running for 75s
% 0.49/0.70 % /export/starexec/sandbox/solver/bin/fo/fo3_bce.sh running for 75s
% 0.49/0.71 % /export/starexec/sandbox/solver/bin/fo/fo7.sh running for 63s
% 0.49/0.71 % /export/starexec/sandbox/solver/bin/fo/fo1_av.sh running for 75s
% 0.49/0.72 % /export/starexec/sandbox/solver/bin/fo/fo13.sh running for 50s
% 0.49/0.72 % /export/starexec/sandbox/solver/bin/fo/fo5.sh running for 50s
% 0.49/0.72 % /export/starexec/sandbox/solver/bin/fo/fo4.sh running for 50s
% 11.14/2.17 % Solved by fo/fo5.sh.
% 11.14/2.17 % done 487 iterations in 1.426s
% 11.14/2.17 % SZS status Theorem for '/export/starexec/sandbox/benchmark/theBenchmark.p'
% 11.14/2.17 % SZS output start Refutation
% 11.14/2.17 thf(zero_type, type, zero: $i).
% 11.14/2.17 thf(a_type, type, a: $i).
% 11.14/2.17 thf(divide_type, type, divide: $i > $i > $i).
% 11.14/2.17 thf(identity_type, type, identity: $i).
% 11.14/2.17 thf(prove_this, conjecture,
% 11.14/2.17 (( divide @ identity @ a ) =
% 11.14/2.17 ( divide @ identity @ ( divide @ identity @ ( divide @ identity @ a ) ) ))).
% 11.14/2.17 thf(zf_stmt_0, negated_conjecture,
% 11.14/2.17 (( divide @ identity @ a ) !=
% 11.14/2.17 ( divide @ identity @ ( divide @ identity @ ( divide @ identity @ a ) ) )),
% 11.14/2.17 inference('cnf.neg', [status(esa)], [prove_this])).
% 11.14/2.17 thf(zip_derived_cl8, plain,
% 11.14/2.17 (((divide @ identity @ a)
% 11.14/2.17 != (divide @ identity @ (divide @ identity @ (divide @ identity @ a))))),
% 11.14/2.17 inference('cnf', [status(esa)], [zf_stmt_0])).
% 11.14/2.17 thf(quotient_smaller_than_numerator, axiom,
% 11.14/2.17 (( divide @ ( divide @ X @ Y ) @ X ) = ( zero ))).
% 11.14/2.17 thf(zip_derived_cl0, plain,
% 11.14/2.17 (![X0 : $i, X1 : $i]: ((divide @ (divide @ X0 @ X1) @ X0) = (zero))),
% 11.14/2.17 inference('cnf', [status(esa)], [quotient_smaller_than_numerator])).
% 11.14/2.17 thf(property_of_divide1, axiom,
% 11.14/2.17 (( ( divide @ ( divide @ X @ Y ) @ Z ) != ( zero ) ) |
% 11.14/2.17 ( ( divide @ ( divide @ X @ Z ) @ Y ) = ( zero ) ))).
% 11.14/2.17 thf(zip_derived_cl6, plain,
% 11.14/2.17 (![X0 : $i, X1 : $i, X2 : $i]:
% 11.14/2.17 (((divide @ (divide @ X0 @ X1) @ X2) != (zero))
% 11.14/2.17 | ((divide @ (divide @ X0 @ X2) @ X1) = (zero)))),
% 11.14/2.17 inference('cnf', [status(esa)], [property_of_divide1])).
% 11.14/2.17 thf(zip_derived_cl83, plain,
% 11.14/2.17 (![X0 : $i, X1 : $i]:
% 11.14/2.17 (((zero) != (zero)) | ((divide @ (divide @ X0 @ X0) @ X1) = (zero)))),
% 11.14/2.17 inference('sup-', [status(thm)], [zip_derived_cl0, zip_derived_cl6])).
% 11.14/2.17 thf(zip_derived_cl91, plain,
% 11.14/2.17 (![X0 : $i, X1 : $i]: ((divide @ (divide @ X0 @ X0) @ X1) = (zero))),
% 11.14/2.17 inference('simplify', [status(thm)], [zip_derived_cl83])).
% 11.14/2.17 thf(zip_derived_cl0, plain,
% 11.14/2.17 (![X0 : $i, X1 : $i]: ((divide @ (divide @ X0 @ X1) @ X0) = (zero))),
% 11.14/2.17 inference('cnf', [status(esa)], [quotient_smaller_than_numerator])).
% 11.14/2.17 thf(divide_and_equal, axiom,
% 11.14/2.17 (( ( divide @ X @ Y ) != ( zero ) ) | ( ( divide @ Y @ X ) != ( zero ) ) |
% 11.14/2.17 ( ( X ) = ( Y ) ))).
% 11.14/2.17 thf(zip_derived_cl3, plain,
% 11.14/2.17 (![X0 : $i, X1 : $i]:
% 11.14/2.17 (((divide @ X0 @ X1) != (zero))
% 11.14/2.17 | ((divide @ X1 @ X0) != (zero))
% 11.14/2.17 | ((X0) = (X1)))),
% 11.14/2.17 inference('cnf', [status(esa)], [divide_and_equal])).
% 11.14/2.17 thf(zip_derived_cl14, plain,
% 11.14/2.17 (![X0 : $i, X1 : $i]:
% 11.14/2.17 (((zero) != (zero))
% 11.14/2.17 | ((divide @ X0 @ X1) = (X0))
% 11.14/2.17 | ((divide @ X0 @ (divide @ X0 @ X1)) != (zero)))),
% 11.14/2.17 inference('sup-', [status(thm)], [zip_derived_cl0, zip_derived_cl3])).
% 11.14/2.17 thf(zip_derived_cl17, plain,
% 11.14/2.17 (![X0 : $i, X1 : $i]:
% 11.14/2.17 (((divide @ X0 @ (divide @ X0 @ X1)) != (zero))
% 11.14/2.17 | ((divide @ X0 @ X1) = (X0)))),
% 11.14/2.17 inference('simplify', [status(thm)], [zip_derived_cl14])).
% 11.14/2.17 thf(zip_derived_cl121, plain,
% 11.14/2.17 (![X0 : $i, X1 : $i]:
% 11.14/2.17 (((divide @ (divide @ X1 @ X1) @ zero) != (zero))
% 11.14/2.17 | ((divide @ (divide @ X1 @ X1) @ X0) = (divide @ X1 @ X1)))),
% 11.14/2.17 inference('sup-', [status(thm)], [zip_derived_cl91, zip_derived_cl17])).
% 11.14/2.17 thf(zip_derived_cl91, plain,
% 11.14/2.17 (![X0 : $i, X1 : $i]: ((divide @ (divide @ X0 @ X0) @ X1) = (zero))),
% 11.14/2.17 inference('simplify', [status(thm)], [zip_derived_cl83])).
% 11.14/2.17 thf(zip_derived_cl91, plain,
% 11.14/2.17 (![X0 : $i, X1 : $i]: ((divide @ (divide @ X0 @ X0) @ X1) = (zero))),
% 11.14/2.17 inference('simplify', [status(thm)], [zip_derived_cl83])).
% 11.14/2.17 thf(zip_derived_cl140, plain,
% 11.14/2.17 (![X1 : $i]: (((zero) != (zero)) | ((zero) = (divide @ X1 @ X1)))),
% 11.14/2.17 inference('demod', [status(thm)],
% 11.14/2.17 [zip_derived_cl121, zip_derived_cl91, zip_derived_cl91])).
% 11.14/2.17 thf(zip_derived_cl141, plain, (![X1 : $i]: ((zero) = (divide @ X1 @ X1))),
% 11.14/2.17 inference('simplify', [status(thm)], [zip_derived_cl140])).
% 11.14/2.17 thf(zip_derived_cl6, plain,
% 11.14/2.17 (![X0 : $i, X1 : $i, X2 : $i]:
% 11.14/2.17 (((divide @ (divide @ X0 @ X1) @ X2) != (zero))
% 11.14/2.17 | ((divide @ (divide @ X0 @ X2) @ X1) = (zero)))),
% 11.14/2.17 inference('cnf', [status(esa)], [property_of_divide1])).
% 11.14/2.17 thf(zip_derived_cl176, plain,
% 11.14/2.17 (![X0 : $i, X1 : $i]:
% 11.14/2.17 (((zero) != (zero))
% 11.14/2.17 | ((divide @ (divide @ X1 @ (divide @ X1 @ X0)) @ X0) = (zero)))),
% 11.14/2.17 inference('sup-', [status(thm)], [zip_derived_cl141, zip_derived_cl6])).
% 11.14/2.17 thf(zip_derived_cl191, plain,
% 11.14/2.17 (![X0 : $i, X1 : $i]:
% 11.14/2.17 ((divide @ (divide @ X1 @ (divide @ X1 @ X0)) @ X0) = (zero))),
% 11.14/2.17 inference('simplify', [status(thm)], [zip_derived_cl176])).
% 11.14/2.17 thf(property_of_divide2, axiom,
% 11.14/2.17 (( ( divide @ X @ Y ) != ( zero ) ) |
% 11.14/2.17 ( ( divide @ ( divide @ Z @ Y ) @ ( divide @ Z @ X ) ) = ( zero ) ))).
% 11.14/2.17 thf(zip_derived_cl7, plain,
% 11.14/2.17 (![X0 : $i, X1 : $i, X2 : $i]:
% 11.14/2.17 (((divide @ X0 @ X1) != (zero))
% 11.14/2.17 | ((divide @ (divide @ X2 @ X1) @ (divide @ X2 @ X0)) = (zero)))),
% 11.14/2.17 inference('cnf', [status(esa)], [property_of_divide2])).
% 11.14/2.17 thf(zip_derived_cl210, plain,
% 11.14/2.17 (![X0 : $i, X1 : $i, X2 : $i]:
% 11.14/2.17 (((zero) != (zero))
% 11.14/2.17 | ((divide @ (divide @ X2 @ X0) @
% 11.14/2.17 (divide @ X2 @ (divide @ X1 @ (divide @ X1 @ X0)))) = (zero)))),
% 11.14/2.17 inference('sup-', [status(thm)], [zip_derived_cl191, zip_derived_cl7])).
% 11.14/2.17 thf(zip_derived_cl234, plain,
% 11.14/2.17 (![X0 : $i, X1 : $i, X2 : $i]:
% 11.14/2.17 ((divide @ (divide @ X2 @ X0) @
% 11.14/2.17 (divide @ X2 @ (divide @ X1 @ (divide @ X1 @ X0)))) = (zero))),
% 11.14/2.17 inference('simplify', [status(thm)], [zip_derived_cl210])).
% 11.14/2.17 thf(identity_is_largest, axiom, (( divide @ X @ identity ) = ( zero ))).
% 11.14/2.17 thf(zip_derived_cl4, plain,
% 11.14/2.17 (![X0 : $i]: ((divide @ X0 @ identity) = (zero))),
% 11.14/2.17 inference('cnf', [status(esa)], [identity_is_largest])).
% 11.14/2.17 thf(quotient_property, axiom,
% 11.14/2.17 (( divide @
% 11.14/2.17 ( divide @ ( divide @ X @ Z ) @ ( divide @ Y @ Z ) ) @
% 11.14/2.17 ( divide @ ( divide @ X @ Y ) @ Z ) ) =
% 11.14/2.17 ( zero ))).
% 11.14/2.17 thf(zip_derived_cl1, plain,
% 11.14/2.17 (![X0 : $i, X1 : $i, X2 : $i]:
% 11.14/2.17 ((divide @ (divide @ (divide @ X0 @ X1) @ (divide @ X2 @ X1)) @
% 11.14/2.17 (divide @ (divide @ X0 @ X2) @ X1)) = (zero))),
% 11.14/2.17 inference('cnf', [status(esa)], [quotient_property])).
% 11.14/2.17 thf(zip_derived_cl1, plain,
% 11.14/2.17 (![X0 : $i, X1 : $i, X2 : $i]:
% 11.14/2.17 ((divide @ (divide @ (divide @ X0 @ X1) @ (divide @ X2 @ X1)) @
% 11.14/2.17 (divide @ (divide @ X0 @ X2) @ X1)) = (zero))),
% 11.14/2.17 inference('cnf', [status(esa)], [quotient_property])).
% 11.14/2.17 thf(zip_derived_cl31, plain,
% 11.14/2.17 (![X0 : $i, X1 : $i, X2 : $i]:
% 11.14/2.17 ((divide @
% 11.14/2.17 (divide @
% 11.14/2.17 (divide @ (divide @ X2 @ X0) @ (divide @ (divide @ X2 @ X1) @ X0)) @
% 11.14/2.17 (divide @ (divide @ X1 @ X0) @ (divide @ (divide @ X2 @ X1) @ X0))) @
% 11.14/2.17 zero) = (zero))),
% 11.14/2.17 inference('sup+', [status(thm)], [zip_derived_cl1, zip_derived_cl1])).
% 11.14/2.17 thf(zip_derived_cl547, plain,
% 11.14/2.17 (![X0 : $i, X1 : $i]:
% 11.14/2.17 ((divide @
% 11.14/2.17 (divide @
% 11.14/2.17 (divide @ (divide @ X1 @ X0) @
% 11.14/2.17 (divide @ (divide @ X1 @ identity) @ X0)) @
% 11.14/2.17 (divide @ (divide @ identity @ X0) @ (divide @ zero @ X0))) @
% 11.14/2.17 zero) = (zero))),
% 11.14/2.17 inference('sup+', [status(thm)], [zip_derived_cl4, zip_derived_cl31])).
% 11.14/2.17 thf(zip_derived_cl4, plain,
% 11.14/2.17 (![X0 : $i]: ((divide @ X0 @ identity) = (zero))),
% 11.14/2.17 inference('cnf', [status(esa)], [identity_is_largest])).
% 11.14/2.17 thf(zero_is_smallest, axiom, (( divide @ zero @ X ) = ( zero ))).
% 11.14/2.17 thf(zip_derived_cl2, plain, (![X0 : $i]: ((divide @ zero @ X0) = (zero))),
% 11.14/2.17 inference('cnf', [status(esa)], [zero_is_smallest])).
% 11.14/2.17 thf(zip_derived_cl191, plain,
% 11.14/2.17 (![X0 : $i, X1 : $i]:
% 11.14/2.17 ((divide @ (divide @ X1 @ (divide @ X1 @ X0)) @ X0) = (zero))),
% 11.14/2.17 inference('simplify', [status(thm)], [zip_derived_cl176])).
% 11.14/2.17 thf(zip_derived_cl2, plain, (![X0 : $i]: ((divide @ zero @ X0) = (zero))),
% 11.14/2.17 inference('cnf', [status(esa)], [zero_is_smallest])).
% 11.14/2.17 thf(zip_derived_cl3, plain,
% 11.14/2.17 (![X0 : $i, X1 : $i]:
% 11.14/2.17 (((divide @ X0 @ X1) != (zero))
% 11.14/2.17 | ((divide @ X1 @ X0) != (zero))
% 11.14/2.17 | ((X0) = (X1)))),
% 11.14/2.17 inference('cnf', [status(esa)], [divide_and_equal])).
% 11.14/2.17 thf(zip_derived_cl15, plain,
% 11.14/2.17 (![X0 : $i]:
% 11.14/2.17 (((zero) != (zero))
% 11.14/2.17 | ((zero) = (X0))
% 11.14/2.17 | ((divide @ X0 @ zero) != (zero)))),
% 11.14/2.17 inference('sup-', [status(thm)], [zip_derived_cl2, zip_derived_cl3])).
% 11.14/2.17 thf(zip_derived_cl18, plain,
% 11.14/2.17 (![X0 : $i]: (((divide @ X0 @ zero) != (zero)) | ((zero) = (X0)))),
% 11.14/2.17 inference('simplify', [status(thm)], [zip_derived_cl15])).
% 11.14/2.17 thf(zip_derived_cl216, plain,
% 11.14/2.17 (![X0 : $i]:
% 11.14/2.17 (((zero) != (zero)) | ((zero) = (divide @ X0 @ (divide @ X0 @ zero))))),
% 11.14/2.17 inference('sup-', [status(thm)], [zip_derived_cl191, zip_derived_cl18])).
% 11.14/2.17 thf(zip_derived_cl238, plain,
% 11.14/2.17 (![X0 : $i]: ((zero) = (divide @ X0 @ (divide @ X0 @ zero)))),
% 11.14/2.17 inference('simplify', [status(thm)], [zip_derived_cl216])).
% 11.14/2.17 thf(zip_derived_cl3, plain,
% 11.14/2.17 (![X0 : $i, X1 : $i]:
% 11.14/2.17 (((divide @ X0 @ X1) != (zero))
% 11.14/2.17 | ((divide @ X1 @ X0) != (zero))
% 11.14/2.17 | ((X0) = (X1)))),
% 11.14/2.17 inference('cnf', [status(esa)], [divide_and_equal])).
% 11.14/2.17 thf(zip_derived_cl246, plain,
% 11.14/2.17 (![X0 : $i]:
% 11.14/2.17 (((zero) != (zero))
% 11.14/2.17 | ((X0) = (divide @ X0 @ zero))
% 11.14/2.17 | ((divide @ (divide @ X0 @ zero) @ X0) != (zero)))),
% 11.14/2.17 inference('sup-', [status(thm)], [zip_derived_cl238, zip_derived_cl3])).
% 11.14/2.17 thf(zip_derived_cl0, plain,
% 11.14/2.17 (![X0 : $i, X1 : $i]: ((divide @ (divide @ X0 @ X1) @ X0) = (zero))),
% 11.14/2.17 inference('cnf', [status(esa)], [quotient_smaller_than_numerator])).
% 11.14/2.17 thf(zip_derived_cl269, plain,
% 11.14/2.17 (![X0 : $i]:
% 11.14/2.17 (((zero) != (zero))
% 11.14/2.17 | ((X0) = (divide @ X0 @ zero))
% 11.14/2.17 | ((zero) != (zero)))),
% 11.14/2.17 inference('demod', [status(thm)], [zip_derived_cl246, zip_derived_cl0])).
% 11.14/2.17 thf(zip_derived_cl270, plain, (![X0 : $i]: ((X0) = (divide @ X0 @ zero))),
% 11.14/2.17 inference('simplify', [status(thm)], [zip_derived_cl269])).
% 11.14/2.17 thf(zip_derived_cl2, plain, (![X0 : $i]: ((divide @ zero @ X0) = (zero))),
% 11.14/2.17 inference('cnf', [status(esa)], [zero_is_smallest])).
% 11.14/2.17 thf(zip_derived_cl270, plain, (![X0 : $i]: ((X0) = (divide @ X0 @ zero))),
% 11.14/2.17 inference('simplify', [status(thm)], [zip_derived_cl269])).
% 11.14/2.17 thf(zip_derived_cl270, plain, (![X0 : $i]: ((X0) = (divide @ X0 @ zero))),
% 11.14/2.17 inference('simplify', [status(thm)], [zip_derived_cl269])).
% 11.14/2.17 thf(zip_derived_cl593, plain,
% 11.14/2.17 (![X0 : $i, X1 : $i]:
% 11.14/2.17 ((divide @ (divide @ X1 @ X0) @ (divide @ identity @ X0)) = (zero))),
% 11.14/2.17 inference('demod', [status(thm)],
% 11.14/2.17 [zip_derived_cl547, zip_derived_cl4, zip_derived_cl2,
% 11.14/2.17 zip_derived_cl270, zip_derived_cl2, zip_derived_cl270,
% 11.14/2.17 zip_derived_cl270])).
% 11.14/2.17 thf(zip_derived_cl6, plain,
% 11.14/2.17 (![X0 : $i, X1 : $i, X2 : $i]:
% 11.14/2.17 (((divide @ (divide @ X0 @ X1) @ X2) != (zero))
% 11.14/2.17 | ((divide @ (divide @ X0 @ X2) @ X1) = (zero)))),
% 11.14/2.17 inference('cnf', [status(esa)], [property_of_divide1])).
% 11.14/2.17 thf(zip_derived_cl677, plain,
% 11.14/2.17 (![X0 : $i, X1 : $i]:
% 11.14/2.17 (((zero) != (zero))
% 11.14/2.17 | ((divide @ (divide @ X1 @ (divide @ identity @ X0)) @ X0) = (zero)))),
% 11.14/2.17 inference('sup-', [status(thm)], [zip_derived_cl593, zip_derived_cl6])).
% 11.14/2.17 thf(zip_derived_cl714, plain,
% 11.14/2.17 (![X0 : $i, X1 : $i]:
% 11.14/2.17 ((divide @ (divide @ X1 @ (divide @ identity @ X0)) @ X0) = (zero))),
% 11.14/2.17 inference('simplify', [status(thm)], [zip_derived_cl677])).
% 11.14/2.17 thf(zip_derived_cl3, plain,
% 11.14/2.17 (![X0 : $i, X1 : $i]:
% 11.14/2.17 (((divide @ X0 @ X1) != (zero))
% 11.14/2.17 | ((divide @ X1 @ X0) != (zero))
% 11.14/2.17 | ((X0) = (X1)))),
% 11.14/2.17 inference('cnf', [status(esa)], [divide_and_equal])).
% 11.14/2.17 thf(zip_derived_cl796, plain,
% 11.14/2.17 (![X0 : $i, X1 : $i]:
% 11.14/2.17 (((zero) != (zero))
% 11.14/2.17 | ((divide @ X1 @ (divide @ identity @ X0)) = (X0))
% 11.14/2.17 | ((divide @ X0 @ (divide @ X1 @ (divide @ identity @ X0))) != (zero)))),
% 11.14/2.17 inference('sup-', [status(thm)], [zip_derived_cl714, zip_derived_cl3])).
% 11.14/2.17 thf(zip_derived_cl832, plain,
% 11.14/2.17 (![X0 : $i, X1 : $i]:
% 11.14/2.17 (((divide @ X0 @ (divide @ X1 @ (divide @ identity @ X0))) != (zero))
% 11.14/2.17 | ((divide @ X1 @ (divide @ identity @ X0)) = (X0)))),
% 11.14/2.17 inference('simplify', [status(thm)], [zip_derived_cl796])).
% 11.14/2.17 thf(zip_derived_cl6466, plain,
% 11.14/2.17 (![X0 : $i]:
% 11.14/2.17 (((zero) != (zero))
% 11.14/2.17 | ((divide @ identity @
% 11.14/2.17 (divide @ identity @ (divide @ identity @ X0)))
% 11.14/2.17 = (divide @ identity @ X0)))),
% 11.14/2.17 inference('sup-', [status(thm)], [zip_derived_cl234, zip_derived_cl832])).
% 11.14/2.17 thf(zip_derived_cl6690, plain,
% 11.14/2.17 (![X0 : $i]:
% 11.14/2.17 ((divide @ identity @ (divide @ identity @ (divide @ identity @ X0)))
% 11.14/2.17 = (divide @ identity @ X0))),
% 11.14/2.17 inference('simplify', [status(thm)], [zip_derived_cl6466])).
% 11.14/2.17 thf(zip_derived_cl7088, plain,
% 11.14/2.17 (((divide @ identity @ a) != (divide @ identity @ a))),
% 11.14/2.17 inference('demod', [status(thm)], [zip_derived_cl8, zip_derived_cl6690])).
% 11.14/2.17 thf(zip_derived_cl7089, plain, ($false),
% 11.14/2.17 inference('simplify', [status(thm)], [zip_derived_cl7088])).
% 11.14/2.17
% 11.14/2.17 % SZS output end Refutation
% 11.14/2.17
% 11.14/2.17
% 11.14/2.17 % Terminating...
% 11.76/2.28 % Runner terminated.
% 11.76/2.30 % Zipperpin 1.5 exiting
%------------------------------------------------------------------------------