%------------------------------------------------------------------------------
% File : Zipperpin---2.1.9999
% Problem : GRP604-1 : TPTP v9.2.0. Bugfixed v2.7.0.
% Transfm : none
% Format : tptp:raw
% Command : python3 /export/starexec/sandbox/solver/bin/portfolio.lams.parallel.py %s %d /export/starexec/sandbox/tmp/tmp.KOre7Lnk8A true
% Computer : n027.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 04:36:45 PM UTC 2025
% Result : Unsatisfiable 1.35s 1.28s
% Output : Refutation 1.35s
% Verified :
% SZS Type : -
% Comments :
%------------------------------------------------------------------------------
%----WARNING: Could not form TPTP format derivation
%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.07/0.16 % Problem : GRP604-1 : TPTP v9.2.0. Bugfixed v2.7.0.
% 0.07/0.17 % Command : python3 /export/starexec/sandbox/solver/bin/portfolio.lams.parallel.py %s %d /export/starexec/sandbox/tmp/tmp.KOre7Lnk8A true
% 0.12/0.41 % Computer : n027.cluster.edu
% 0.12/0.41 % Model : x86_64 x86_64
% 0.12/0.41 % CPU : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz
% 0.12/0.41 % Memory : 8042.1875MB
% 0.12/0.41 % OS : Linux 3.10.0-693.el7.x86_64
% 0.12/0.41 % CPULimit : 300
% 0.12/0.41 % WCLimit : 300
% 0.12/0.41 % DateTime : Wed Oct 1 14:23:53 EDT 2025
% 0.12/0.41 % CPUTime :
% 0.12/0.41 % Running portfolio for 300 s
% 0.12/0.41 % File : /export/starexec/sandbox/benchmark/theBenchmark.p
% 0.12/0.41 % Number of cores: 8
% 0.19/0.41 % Python version: Python 3.6.8
% 0.19/0.41 % Running in FO mode
% 0.61/0.73 % Total configuration time : 435
% 0.61/0.73 % Estimated wc time : 1092
% 0.61/0.73 % Estimated cpu time (7 cpus) : 156.0
% 0.71/0.83 % /export/starexec/sandbox/solver/bin/fo/fo6_bce.sh running for 75s
% 0.71/0.84 % /export/starexec/sandbox/solver/bin/fo/fo3_bce.sh running for 75s
% 0.71/0.84 % /export/starexec/sandbox/solver/bin/fo/fo1_av.sh running for 75s
% 0.71/0.84 % /export/starexec/sandbox/solver/bin/fo/fo7.sh running for 63s
% 1.26/0.84 % /export/starexec/sandbox/solver/bin/fo/fo13.sh running for 50s
% 1.26/0.89 % /export/starexec/sandbox/solver/bin/fo/fo5.sh running for 50s
% 1.35/0.91 % /export/starexec/sandbox/solver/bin/fo/fo4.sh running for 50s
% 1.35/1.28 % Solved by fo/fo6_bce.sh.
% 1.35/1.28 % BCE start: 3
% 1.35/1.28 % BCE eliminated: 0
% 1.35/1.28 % PE start: 3
% 1.35/1.28 logic: eq
% 1.35/1.28 % PE eliminated: 0
% 1.35/1.28 % done 41 iterations in 0.392s
% 1.35/1.28 % SZS status Theorem for '/export/starexec/sandbox/benchmark/theBenchmark.p'
% 1.35/1.28 % SZS output start Refutation
% 1.35/1.28 thf(multiply_type, type, multiply: $i > $i > $i).
% 1.35/1.28 thf(b_type, type, b: $i).
% 1.35/1.28 thf(inverse_type, type, inverse: $i > $i).
% 1.35/1.28 thf(double_divide_type, type, double_divide: $i > $i > $i).
% 1.35/1.28 thf(a_type, type, a: $i).
% 1.35/1.28 thf(prove_these_axioms_4, conjecture,
% 1.35/1.28 (( multiply @ a @ b ) = ( multiply @ b @ a ))).
% 1.35/1.28 thf(zf_stmt_0, negated_conjecture,
% 1.35/1.28 (( multiply @ a @ b ) != ( multiply @ b @ a )),
% 1.35/1.28 inference('cnf.neg', [status(esa)], [prove_these_axioms_4])).
% 1.35/1.28 thf(zip_derived_cl2, plain, (((multiply @ a @ b) != (multiply @ b @ a))),
% 1.35/1.28 inference('cnf', [status(esa)], [zf_stmt_0])).
% 1.35/1.28 thf(multiply, axiom,
% 1.35/1.28 (( multiply @ A @ B ) = ( inverse @ ( double_divide @ B @ A ) ))).
% 1.35/1.28 thf(zip_derived_cl1, plain,
% 1.35/1.28 (![X0 : $i, X1 : $i]:
% 1.35/1.28 ((multiply @ X1 @ X0) = (inverse @ (double_divide @ X0 @ X1)))),
% 1.35/1.28 inference('cnf', [status(esa)], [multiply])).
% 1.35/1.28 thf(zip_derived_cl1, plain,
% 1.35/1.28 (![X0 : $i, X1 : $i]:
% 1.35/1.28 ((multiply @ X1 @ X0) = (inverse @ (double_divide @ X0 @ X1)))),
% 1.35/1.28 inference('cnf', [status(esa)], [multiply])).
% 1.35/1.28 thf(zip_derived_cl3, plain,
% 1.35/1.28 (((inverse @ (double_divide @ b @ a))
% 1.35/1.28 != (inverse @ (double_divide @ a @ b)))),
% 1.35/1.28 inference('demod', [status(thm)],
% 1.35/1.28 [zip_derived_cl2, zip_derived_cl1, zip_derived_cl1])).
% 1.35/1.28 thf(single_axiom, axiom,
% 1.35/1.28 (( inverse @
% 1.35/1.28 ( double_divide @
% 1.35/1.28 ( inverse @
% 1.35/1.28 ( double_divide @
% 1.35/1.28 A @
% 1.35/1.28 ( inverse @ ( double_divide @ B @ ( double_divide @ A @ C ) ) ) ) ) @
% 1.35/1.28 C ) ) =
% 1.35/1.28 ( B ))).
% 1.35/1.28 thf(zip_derived_cl0, plain,
% 1.35/1.28 (![X0 : $i, X1 : $i, X2 : $i]:
% 1.35/1.28 ((inverse @
% 1.35/1.28 (double_divide @
% 1.35/1.28 (inverse @
% 1.35/1.28 (double_divide @ X1 @
% 1.35/1.28 (inverse @ (double_divide @ X0 @ (double_divide @ X1 @ X2))))) @
% 1.35/1.28 X2))
% 1.35/1.28 = (X0))),
% 1.35/1.28 inference('cnf', [status(esa)], [single_axiom])).
% 1.35/1.28 thf(zip_derived_cl0, plain,
% 1.35/1.28 (![X0 : $i, X1 : $i, X2 : $i]:
% 1.35/1.28 ((inverse @
% 1.35/1.28 (double_divide @
% 1.35/1.28 (inverse @
% 1.35/1.28 (double_divide @ X1 @
% 1.35/1.28 (inverse @ (double_divide @ X0 @ (double_divide @ X1 @ X2))))) @
% 1.35/1.28 X2))
% 1.35/1.28 = (X0))),
% 1.35/1.28 inference('cnf', [status(esa)], [single_axiom])).
% 1.35/1.28 thf(zip_derived_cl4, plain,
% 1.35/1.28 (![X0 : $i, X1 : $i, X2 : $i, X3 : $i]:
% 1.35/1.28 ((inverse @
% 1.35/1.28 (double_divide @ (inverse @ (double_divide @ X2 @ X0)) @ X1))
% 1.35/1.28 = (inverse @
% 1.35/1.28 (double_divide @ X3 @
% 1.35/1.28 (inverse @
% 1.35/1.28 (double_divide @ X0 @
% 1.35/1.28 (double_divide @ X3 @ (double_divide @ X2 @ X1)))))))),
% 1.35/1.28 inference('s_sup+', [status(thm)], [zip_derived_cl0, zip_derived_cl0])).
% 1.35/1.28 thf(zip_derived_cl0, plain,
% 1.35/1.28 (![X0 : $i, X1 : $i, X2 : $i]:
% 1.35/1.28 ((inverse @
% 1.35/1.28 (double_divide @
% 1.35/1.28 (inverse @
% 1.35/1.28 (double_divide @ X1 @
% 1.35/1.28 (inverse @ (double_divide @ X0 @ (double_divide @ X1 @ X2))))) @
% 1.35/1.28 X2))
% 1.35/1.28 = (X0))),
% 1.35/1.28 inference('cnf', [status(esa)], [single_axiom])).
% 1.35/1.28 thf(zip_derived_cl6, plain,
% 1.35/1.28 (![X0 : $i, X1 : $i, X2 : $i]:
% 1.35/1.28 ((inverse @
% 1.35/1.28 (double_divide @
% 1.35/1.28 (inverse @
% 1.35/1.28 (double_divide @ (inverse @ (double_divide @ X2 @ X1)) @ X0)) @
% 1.35/1.28 (double_divide @ X2 @ X0)))
% 1.35/1.28 = (X1))),
% 1.35/1.28 inference('s_sup+', [status(thm)], [zip_derived_cl4, zip_derived_cl0])).
% 1.35/1.28 thf(zip_derived_cl6, plain,
% 1.35/1.28 (![X0 : $i, X1 : $i, X2 : $i]:
% 1.35/1.28 ((inverse @
% 1.35/1.28 (double_divide @
% 1.35/1.28 (inverse @
% 1.35/1.28 (double_divide @ (inverse @ (double_divide @ X2 @ X1)) @ X0)) @
% 1.35/1.28 (double_divide @ X2 @ X0)))
% 1.35/1.28 = (X1))),
% 1.35/1.28 inference('s_sup+', [status(thm)], [zip_derived_cl4, zip_derived_cl0])).
% 1.35/1.28 thf(zip_derived_cl12, plain,
% 1.35/1.28 (![X0 : $i, X1 : $i, X2 : $i]:
% 1.35/1.28 ((inverse @
% 1.35/1.28 (double_divide @ X0 @
% 1.35/1.28 (double_divide @ (inverse @ (double_divide @ X2 @ X0)) @
% 1.35/1.28 (double_divide @ X2 @ X1))))
% 1.35/1.28 = (X1))),
% 1.35/1.28 inference('s_sup+', [status(thm)], [zip_derived_cl6, zip_derived_cl6])).
% 1.35/1.28 thf(zip_derived_cl6, plain,
% 1.35/1.28 (![X0 : $i, X1 : $i, X2 : $i]:
% 1.35/1.28 ((inverse @
% 1.35/1.28 (double_divide @
% 1.35/1.28 (inverse @
% 1.35/1.28 (double_divide @ (inverse @ (double_divide @ X2 @ X1)) @ X0)) @
% 1.35/1.28 (double_divide @ X2 @ X0)))
% 1.35/1.28 = (X1))),
% 1.35/1.28 inference('s_sup+', [status(thm)], [zip_derived_cl4, zip_derived_cl0])).
% 1.35/1.28 thf(zip_derived_cl6, plain,
% 1.35/1.28 (![X0 : $i, X1 : $i, X2 : $i]:
% 1.35/1.28 ((inverse @
% 1.35/1.28 (double_divide @
% 1.35/1.28 (inverse @
% 1.35/1.28 (double_divide @ (inverse @ (double_divide @ X2 @ X1)) @ X0)) @
% 1.35/1.28 (double_divide @ X2 @ X0)))
% 1.35/1.28 = (X1))),
% 1.35/1.28 inference('s_sup+', [status(thm)], [zip_derived_cl4, zip_derived_cl0])).
% 1.35/1.28 thf(zip_derived_cl9, plain,
% 1.35/1.28 (![X0 : $i, X1 : $i, X2 : $i, X3 : $i]:
% 1.35/1.28 ((inverse @
% 1.35/1.28 (double_divide @ (inverse @ (double_divide @ X0 @ X3)) @
% 1.35/1.28 (double_divide @
% 1.35/1.28 (inverse @
% 1.35/1.28 (double_divide @ (inverse @ (double_divide @ X2 @ X0)) @ X1)) @
% 1.35/1.28 X3)))
% 1.35/1.28 = (double_divide @ X2 @ X1))),
% 1.35/1.28 inference('s_sup+', [status(thm)], [zip_derived_cl6, zip_derived_cl6])).
% 1.35/1.28 thf(zip_derived_cl148, plain,
% 1.35/1.28 (![X0 : $i, X1 : $i, X2 : $i]:
% 1.35/1.28 ((X0)
% 1.35/1.28 = (double_divide @ X2 @
% 1.35/1.28 (inverse @
% 1.35/1.28 (double_divide @ X1 @
% 1.35/1.28 (double_divide @ (inverse @ (double_divide @ X2 @ X1)) @ X0)))))),
% 1.35/1.28 inference('s_sup+', [status(thm)], [zip_derived_cl12, zip_derived_cl9])).
% 1.35/1.28 thf(zip_derived_cl12, plain,
% 1.35/1.28 (![X0 : $i, X1 : $i, X2 : $i]:
% 1.35/1.28 ((inverse @
% 1.35/1.28 (double_divide @ X0 @
% 1.35/1.28 (double_divide @ (inverse @ (double_divide @ X2 @ X0)) @
% 1.35/1.28 (double_divide @ X2 @ X1))))
% 1.35/1.28 = (X1))),
% 1.35/1.28 inference('s_sup+', [status(thm)], [zip_derived_cl6, zip_derived_cl6])).
% 1.35/1.28 thf(zip_derived_cl0, plain,
% 1.35/1.28 (![X0 : $i, X1 : $i, X2 : $i]:
% 1.35/1.28 ((inverse @
% 1.35/1.28 (double_divide @
% 1.35/1.28 (inverse @
% 1.35/1.28 (double_divide @ X1 @
% 1.35/1.28 (inverse @ (double_divide @ X0 @ (double_divide @ X1 @ X2))))) @
% 1.35/1.28 X2))
% 1.35/1.28 = (X0))),
% 1.35/1.28 inference('cnf', [status(esa)], [single_axiom])).
% 1.35/1.28 thf(zip_derived_cl21, plain,
% 1.35/1.28 (![X0 : $i, X1 : $i, X2 : $i]:
% 1.35/1.28 ((inverse @
% 1.35/1.28 (double_divide @
% 1.35/1.28 (inverse @
% 1.35/1.28 (double_divide @ (inverse @ (double_divide @ X2 @ X1)) @ X0)) @
% 1.35/1.28 (double_divide @ X2 @ X0)))
% 1.35/1.28 = (X1))),
% 1.35/1.28 inference('s_sup+', [status(thm)], [zip_derived_cl12, zip_derived_cl0])).
% 1.35/1.28 thf(zip_derived_cl12, plain,
% 1.35/1.28 (![X0 : $i, X1 : $i, X2 : $i]:
% 1.35/1.28 ((inverse @
% 1.35/1.28 (double_divide @ X0 @
% 1.35/1.28 (double_divide @ (inverse @ (double_divide @ X2 @ X0)) @
% 1.35/1.28 (double_divide @ X2 @ X1))))
% 1.35/1.28 = (X1))),
% 1.35/1.28 inference('s_sup+', [status(thm)], [zip_derived_cl6, zip_derived_cl6])).
% 1.35/1.28 thf(zip_derived_cl6, plain,
% 1.35/1.28 (![X0 : $i, X1 : $i, X2 : $i]:
% 1.35/1.28 ((inverse @
% 1.35/1.28 (double_divide @
% 1.35/1.28 (inverse @
% 1.35/1.28 (double_divide @ (inverse @ (double_divide @ X2 @ X1)) @ X0)) @
% 1.35/1.28 (double_divide @ X2 @ X0)))
% 1.35/1.28 = (X1))),
% 1.35/1.28 inference('s_sup+', [status(thm)], [zip_derived_cl4, zip_derived_cl0])).
% 1.35/1.28 thf(zip_derived_cl20, plain,
% 1.35/1.28 (![X0 : $i, X1 : $i, X2 : $i, X3 : $i]:
% 1.35/1.28 ((inverse @
% 1.35/1.28 (double_divide @ (inverse @ (double_divide @ X0 @ X3)) @
% 1.35/1.28 (double_divide @ X2 @ X3)))
% 1.35/1.28 = (double_divide @ (inverse @ (double_divide @ X1 @ X2)) @
% 1.35/1.28 (double_divide @ X1 @ X0)))),
% 1.35/1.28 inference('s_sup+', [status(thm)], [zip_derived_cl12, zip_derived_cl6])).
% 1.35/1.28 thf(zip_derived_cl6, plain,
% 1.35/1.28 (![X0 : $i, X1 : $i, X2 : $i]:
% 1.35/1.28 ((inverse @
% 1.35/1.28 (double_divide @
% 1.35/1.28 (inverse @
% 1.35/1.28 (double_divide @ (inverse @ (double_divide @ X2 @ X1)) @ X0)) @
% 1.35/1.28 (double_divide @ X2 @ X0)))
% 1.35/1.28 = (X1))),
% 1.35/1.28 inference('s_sup+', [status(thm)], [zip_derived_cl4, zip_derived_cl0])).
% 1.35/1.28 thf(zip_derived_cl54, plain,
% 1.35/1.28 (![X0 : $i, X1 : $i, X2 : $i]:
% 1.35/1.28 ((double_divide @ (inverse @ (double_divide @ X2 @ X1)) @
% 1.35/1.28 (double_divide @ X2 @ (inverse @ (double_divide @ X1 @ X0)))) = (
% 1.35/1.28 X0))),
% 1.35/1.28 inference('s_sup+', [status(thm)], [zip_derived_cl20, zip_derived_cl6])).
% 1.35/1.28 thf(zip_derived_cl0, plain,
% 1.35/1.28 (![X0 : $i, X1 : $i, X2 : $i]:
% 1.35/1.28 ((inverse @
% 1.35/1.28 (double_divide @
% 1.35/1.28 (inverse @
% 1.35/1.28 (double_divide @ X1 @
% 1.35/1.28 (inverse @ (double_divide @ X0 @ (double_divide @ X1 @ X2))))) @
% 1.35/1.28 X2))
% 1.35/1.28 = (X0))),
% 1.35/1.28 inference('cnf', [status(esa)], [single_axiom])).
% 1.35/1.28 thf(zip_derived_cl87, plain,
% 1.35/1.28 (![X0 : $i, X1 : $i, X2 : $i]:
% 1.35/1.28 ((inverse @
% 1.35/1.28 (double_divide @
% 1.35/1.28 (inverse @ (double_divide @ X2 @ (inverse @ X0))) @
% 1.35/1.28 (inverse @ (double_divide @ X1 @ X0))))
% 1.35/1.28 = (inverse @ (double_divide @ X2 @ X1)))),
% 1.35/1.28 inference('s_sup+', [status(thm)], [zip_derived_cl54, zip_derived_cl0])).
% 1.35/1.28 thf(zip_derived_cl6, plain,
% 1.35/1.28 (![X0 : $i, X1 : $i, X2 : $i]:
% 1.35/1.28 ((inverse @
% 1.35/1.28 (double_divide @
% 1.35/1.28 (inverse @
% 1.35/1.28 (double_divide @ (inverse @ (double_divide @ X2 @ X1)) @ X0)) @
% 1.35/1.28 (double_divide @ X2 @ X0)))
% 1.35/1.28 = (X1))),
% 1.35/1.28 inference('s_sup+', [status(thm)], [zip_derived_cl4, zip_derived_cl0])).
% 1.35/1.28 thf(zip_derived_cl87, plain,
% 1.35/1.28 (![X0 : $i, X1 : $i, X2 : $i]:
% 1.35/1.28 ((inverse @
% 1.35/1.28 (double_divide @
% 1.35/1.28 (inverse @ (double_divide @ X2 @ (inverse @ X0))) @
% 1.35/1.28 (inverse @ (double_divide @ X1 @ X0))))
% 1.35/1.28 = (inverse @ (double_divide @ X2 @ X1)))),
% 1.35/1.28 inference('s_sup+', [status(thm)], [zip_derived_cl54, zip_derived_cl0])).
% 1.35/1.28 thf(zip_derived_cl120, plain,
% 1.35/1.28 (![X0 : $i, X1 : $i, X2 : $i, X3 : $i]:
% 1.35/1.28 ((inverse @
% 1.35/1.28 (double_divide @
% 1.35/1.28 (inverse @
% 1.35/1.28 (double_divide @ X3 @ (inverse @ (double_divide @ X2 @ X1)))) @
% 1.35/1.28 X0))
% 1.35/1.28 = (inverse @
% 1.35/1.28 (double_divide @ X3 @
% 1.35/1.28 (inverse @
% 1.35/1.28 (double_divide @ (inverse @ (double_divide @ X2 @ X0)) @ X1)))))),
% 1.35/1.28 inference('s_sup+', [status(thm)], [zip_derived_cl6, zip_derived_cl87])).
% 1.35/1.28 thf(zip_derived_cl364, plain,
% 1.35/1.28 (![X0 : $i, X1 : $i, X2 : $i, X3 : $i]:
% 1.35/1.28 ((inverse @
% 1.35/1.28 (double_divide @ (inverse @ (double_divide @ X1 @ X0)) @ X3))
% 1.35/1.28 = (inverse @
% 1.35/1.28 (double_divide @
% 1.35/1.28 (inverse @ (double_divide @ X1 @ (inverse @ X2))) @
% 1.35/1.28 (inverse @
% 1.35/1.28 (double_divide @ (inverse @ (double_divide @ X0 @ X3)) @ X2)))))),
% 1.35/1.28 inference('s_sup+', [status(thm)], [zip_derived_cl87, zip_derived_cl120])).
% 1.35/1.28 thf(zip_derived_cl87, plain,
% 1.35/1.28 (![X0 : $i, X1 : $i, X2 : $i]:
% 1.35/1.28 ((inverse @
% 1.35/1.28 (double_divide @
% 1.35/1.28 (inverse @ (double_divide @ X2 @ (inverse @ X0))) @
% 1.35/1.28 (inverse @ (double_divide @ X1 @ X0))))
% 1.35/1.28 = (inverse @ (double_divide @ X2 @ X1)))),
% 1.35/1.28 inference('s_sup+', [status(thm)], [zip_derived_cl54, zip_derived_cl0])).
% 1.35/1.28 thf(zip_derived_cl381, plain,
% 1.35/1.28 (![X0 : $i, X1 : $i, X3 : $i]:
% 1.35/1.28 ((inverse @
% 1.35/1.28 (double_divide @ (inverse @ (double_divide @ X1 @ X0)) @ X3))
% 1.35/1.28 = (inverse @
% 1.35/1.28 (double_divide @ X1 @ (inverse @ (double_divide @ X0 @ X3)))))),
% 1.35/1.28 inference('demod', [status(thm)], [zip_derived_cl364, zip_derived_cl87])).
% 1.35/1.28 thf(zip_derived_cl381, plain,
% 1.35/1.28 (![X0 : $i, X1 : $i, X3 : $i]:
% 1.35/1.28 ((inverse @
% 1.35/1.28 (double_divide @ (inverse @ (double_divide @ X1 @ X0)) @ X3))
% 1.35/1.28 = (inverse @
% 1.35/1.28 (double_divide @ X1 @ (inverse @ (double_divide @ X0 @ X3)))))),
% 1.35/1.28 inference('demod', [status(thm)], [zip_derived_cl364, zip_derived_cl87])).
% 1.35/1.28 thf(zip_derived_cl381, plain,
% 1.35/1.28 (![X0 : $i, X1 : $i, X3 : $i]:
% 1.35/1.28 ((inverse @
% 1.35/1.28 (double_divide @ (inverse @ (double_divide @ X1 @ X0)) @ X3))
% 1.35/1.28 = (inverse @
% 1.35/1.28 (double_divide @ X1 @ (inverse @ (double_divide @ X0 @ X3)))))),
% 1.35/1.28 inference('demod', [status(thm)], [zip_derived_cl364, zip_derived_cl87])).
% 1.35/1.28 thf(zip_derived_cl698, plain,
% 1.35/1.28 (![X0 : $i, X1 : $i, X2 : $i]:
% 1.35/1.28 ((inverse @
% 1.35/1.28 (double_divide @ X2 @
% 1.35/1.28 (inverse @
% 1.35/1.28 (double_divide @ X1 @
% 1.35/1.28 (inverse @ (double_divide @ X0 @ (double_divide @ X2 @ X0)))))))
% 1.35/1.28 = (X1))),
% 1.35/1.28 inference('demod', [status(thm)],
% 1.35/1.28 [zip_derived_cl21, zip_derived_cl381, zip_derived_cl381,
% 1.35/1.28 zip_derived_cl381])).
% 1.35/1.28 thf(zip_derived_cl716, plain,
% 1.35/1.28 (![X0 : $i, X1 : $i]:
% 1.35/1.28 ((inverse @
% 1.35/1.28 (double_divide @ (inverse @ (double_divide @ X1 @ X0)) @
% 1.35/1.28 (inverse @ X0)))
% 1.35/1.28 = (X1))),
% 1.35/1.28 inference('s_sup+', [status(thm)], [zip_derived_cl148, zip_derived_cl698])).
% 1.35/1.28 thf(zip_derived_cl54, plain,
% 1.35/1.28 (![X0 : $i, X1 : $i, X2 : $i]:
% 1.35/1.28 ((double_divide @ (inverse @ (double_divide @ X2 @ X1)) @
% 1.35/1.28 (double_divide @ X2 @ (inverse @ (double_divide @ X1 @ X0)))) = (
% 1.35/1.28 X0))),
% 1.35/1.28 inference('s_sup+', [status(thm)], [zip_derived_cl20, zip_derived_cl6])).
% 1.35/1.28 thf(zip_derived_cl698, plain,
% 1.35/1.28 (![X0 : $i, X1 : $i, X2 : $i]:
% 1.35/1.28 ((inverse @
% 1.35/1.28 (double_divide @ X2 @
% 1.35/1.28 (inverse @
% 1.35/1.28 (double_divide @ X1 @
% 1.35/1.28 (inverse @ (double_divide @ X0 @ (double_divide @ X2 @ X0)))))))
% 1.35/1.28 = (X1))),
% 1.35/1.28 inference('demod', [status(thm)],
% 1.35/1.28 [zip_derived_cl21, zip_derived_cl381, zip_derived_cl381,
% 1.35/1.28 zip_derived_cl381])).
% 1.35/1.28 thf(zip_derived_cl722, plain,
% 1.35/1.28 (![X0 : $i, X1 : $i]:
% 1.35/1.28 ((inverse @
% 1.35/1.28 (double_divide @ X0 @
% 1.35/1.28 (inverse @ (double_divide @ X1 @ (inverse @ X0)))))
% 1.35/1.28 = (X1))),
% 1.35/1.28 inference('s_sup+', [status(thm)], [zip_derived_cl54, zip_derived_cl698])).
% 1.35/1.28 thf(zip_derived_cl801, plain,
% 1.35/1.28 (![X0 : $i, X1 : $i]:
% 1.35/1.28 ((inverse @ (double_divide @ X1 @ X0))
% 1.35/1.28 = (inverse @ (double_divide @ X0 @ X1)))),
% 1.35/1.28 inference('s_sup+', [status(thm)], [zip_derived_cl716, zip_derived_cl722])).
% 1.35/1.28 thf(zip_derived_cl873, plain,
% 1.35/1.28 (((inverse @ (double_divide @ a @ b))
% 1.35/1.28 != (inverse @ (double_divide @ a @ b)))),
% 1.35/1.28 inference('demod', [status(thm)], [zip_derived_cl3, zip_derived_cl801])).
% 1.35/1.28 thf(zip_derived_cl874, plain, ($false),
% 1.35/1.28 inference('simplify', [status(thm)], [zip_derived_cl873])).
% 1.35/1.28
% 1.35/1.28 % SZS output end Refutation
% 1.35/1.28
% 1.35/1.28
% 1.35/1.28 % Terminating...
% 1.99/1.45 % Runner terminated.
% 1.99/1.47 % Zipperpin 1.5 exiting
%------------------------------------------------------------------------------