%------------------------------------------------------------------------------
% File : Zipperpin---2.1.9999
% Problem : LCL110-2 : TPTP v9.3.1. Released v1.0.0.
% Transfm : none
% Format : tptp:raw
% Command : python3 /export/starexec/sandbox2/solver/bin/portfolio.lams.parallel.py %s %d /export/starexec/sandbox2/tmp/tmp.tiytIpGVJh true
% Computer : n008.cluster.edu
% Model : x86_64 x86_64
% CPU : Intel(R) Xeon(R) CPU E5-2620 v4 2.10GHz
% Memory : 8046.5625MB
% OS : Linux 6.8.0-71-generic
% CPULimit : 300s
% WCLimit : 300s
% DateTime : Mon Sep 7 01:35:13 PM UTC 2026
% Result : Unsatisfiable 0.50s 0.96s
% Output : Refutation 0.50s
% Verified :
% SZS Type : -
% Comments :
%------------------------------------------------------------------------------
%----WARNING: Could not form TPTP format derivation
%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.00/0.02 % Problem : LCL110-2 : TPTP v9.3.1. Released v1.0.0.
% 0.00/0.04 % Command : python3 /export/starexec/sandbox2/solver/bin/portfolio.lams.parallel.py %s %d /export/starexec/sandbox2/tmp/tmp.tiytIpGVJh true
% 0.09/0.36 % Computer : n008.cluster.edu
% 0.09/0.36 % Model : x86_64 x86_64
% 0.09/0.36 % CPU : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz
% 0.09/0.36 % Memory : 8046.5625MB
% 0.09/0.36 % OS : Linux 6.8.0-71-generic
% 0.09/0.36 % CPULimit : 300
% 0.09/0.36 % WCLimit : 300
% 0.09/0.36 % DateTime : Fri Sep 4 14:41:53 UTC 2026
% 0.09/0.37 % CPUTime :
% 0.09/0.37 % Running portfolio for 300 s
% 0.09/0.37 % File : /export/starexec/sandbox2/benchmark/theBenchmark.p
% 0.09/0.37 % Number of cores: 8
% 0.09/0.37 % Python version: Python 3.12.3
% 0.09/0.38 % Running in FO mode
% 0.44/0.66 % Total configuration time : 435
% 0.44/0.66 % Estimated wc time : 1092
% 0.44/0.66 % Estimated cpu time (7 cpus) : 156.0
% 0.48/0.74 % /export/starexec/sandbox2/solver/bin/fo/fo6_bce.sh running for 75s
% 0.48/0.80 % /export/starexec/sandbox2/solver/bin/fo/fo3_bce.sh running for 75s
% 0.48/0.80 % /export/starexec/sandbox2/solver/bin/fo/fo7.sh running for 63s
% 0.48/0.80 % /export/starexec/sandbox2/solver/bin/fo/fo13.sh running for 50s
% 0.48/0.81 % /export/starexec/sandbox2/solver/bin/fo/fo1_av.sh running for 75s
% 0.48/0.81 % /export/starexec/sandbox2/solver/bin/fo/fo5.sh running for 50s
% 0.48/0.81 % /export/starexec/sandbox2/solver/bin/fo/fo4.sh running for 50s
% 0.50/0.96 % Solved by fo/fo6_bce.sh.
% 0.50/0.96 % BCE start: 5
% 0.50/0.96 % BCE eliminated: 0
% 0.50/0.96 % PE start: 5
% 0.50/0.96 logic: eq
% 0.50/0.96 % PE eliminated: 0
% 0.50/0.96 % done 108 iterations in 0.205s
% 0.50/0.96 % SZS status Theorem for '/export/starexec/sandbox2/benchmark/theBenchmark.p'
% 0.50/0.96 % SZS output start Refutation
% 0.50/0.96 thf(truth_type, type, truth: $i).
% 0.50/0.96 thf(implies_type, type, implies: $i > $i > $i).
% 0.50/0.96 thf(x_type, type, x: $i).
% 0.50/0.96 thf(not_type, type, not: $i > $i).
% 0.50/0.96 thf(prove_mv_24, conjecture,
% 0.50/0.96 (( implies @ ( not @ ( not @ x ) ) @ x ) = ( truth ))).
% 0.50/0.96 thf(zf_stmt_0, negated_conjecture,
% 0.50/0.96 (( implies @ ( not @ ( not @ x ) ) @ x ) != ( truth )),
% 0.50/0.96 inference('cnf.neg', [status(esa)], [prove_mv_24])).
% 0.50/0.96 thf(zip_derived_cl4, plain, (((implies @ (not @ (not @ x)) @ x) != (truth))),
% 0.50/0.96 inference('cnf', [status(esa)], [zf_stmt_0])).
% 0.50/0.96 thf(wajsberg_4, axiom,
% 0.50/0.96 (( implies @ ( implies @ ( not @ X ) @ ( not @ Y ) ) @ ( implies @ Y @ X ) ) =
% 0.50/0.96 ( truth ))).
% 0.50/0.96 thf(zip_derived_cl3, plain,
% 0.50/0.96 (![X0 : $i, X1 : $i]:
% 0.50/0.96 ((implies @ (implies @ (not @ X0) @ (not @ X1)) @ (implies @ X1 @ X0))
% 0.50/0.96 = (truth))),
% 0.50/0.96 inference('cnf', [status(esa)], [wajsberg_4])).
% 0.50/0.96 thf(wajsberg_1, axiom, (( implies @ truth @ X ) = ( X ))).
% 0.50/0.96 thf(zip_derived_cl0, plain, (![X0 : $i]: ((implies @ truth @ X0) = (X0))),
% 0.50/0.96 inference('cnf', [status(esa)], [wajsberg_1])).
% 0.50/0.96 thf(zip_derived_cl3, plain,
% 0.50/0.96 (![X0 : $i, X1 : $i]:
% 0.50/0.96 ((implies @ (implies @ (not @ X0) @ (not @ X1)) @ (implies @ X1 @ X0))
% 0.50/0.96 = (truth))),
% 0.50/0.96 inference('cnf', [status(esa)], [wajsberg_4])).
% 0.50/0.96 thf(zip_derived_cl7, plain,
% 0.50/0.96 (![X0 : $i]:
% 0.50/0.96 ((implies @ (implies @ (not @ X0) @ (not @ truth)) @ X0) = (truth))),
% 0.50/0.96 inference('s_sup+', [status(thm)], [zip_derived_cl0, zip_derived_cl3])).
% 0.50/0.96 thf(wajsberg_2, axiom,
% 0.50/0.96 (( implies @
% 0.50/0.96 ( implies @ X @ Y ) @
% 0.50/0.96 ( implies @ ( implies @ Y @ Z ) @ ( implies @ X @ Z ) ) ) =
% 0.50/0.96 ( truth ))).
% 0.50/0.96 thf(zip_derived_cl1, plain,
% 0.50/0.96 (![X0 : $i, X1 : $i, X2 : $i]:
% 0.50/0.96 ((implies @ (implies @ X0 @ X1) @
% 0.50/0.96 (implies @ (implies @ X1 @ X2) @ (implies @ X0 @ X2))) = (truth))),
% 0.50/0.96 inference('cnf', [status(esa)], [wajsberg_2])).
% 0.50/0.96 thf(zip_derived_cl30, plain,
% 0.50/0.96 (![X0 : $i, X1 : $i]:
% 0.50/0.96 ((implies @ (implies @ X1 @ (implies @ (not @ X0) @ (not @ truth))) @
% 0.50/0.96 (implies @ truth @ (implies @ X1 @ X0))) = (truth))),
% 0.50/0.96 inference('s_sup+', [status(thm)], [zip_derived_cl7, zip_derived_cl1])).
% 0.50/0.96 thf(zip_derived_cl0, plain, (![X0 : $i]: ((implies @ truth @ X0) = (X0))),
% 0.50/0.96 inference('cnf', [status(esa)], [wajsberg_1])).
% 0.50/0.96 thf(zip_derived_cl34, plain,
% 0.50/0.96 (![X0 : $i, X1 : $i]:
% 0.50/0.96 ((implies @ (implies @ X1 @ (implies @ (not @ X0) @ (not @ truth))) @
% 0.50/0.96 (implies @ X1 @ X0)) = (truth))),
% 0.50/0.96 inference('demod', [status(thm)], [zip_derived_cl30, zip_derived_cl0])).
% 0.50/0.96 thf(zip_derived_cl1873, plain,
% 0.50/0.96 (![X0 : $i]:
% 0.50/0.96 ((implies @ truth @
% 0.50/0.96 (implies @ (implies @ (not @ (not @ truth)) @ (not @ (not @ X0))) @
% 0.50/0.96 X0))
% 0.50/0.96 = (truth))),
% 0.50/0.96 inference('s_sup+', [status(thm)], [zip_derived_cl3, zip_derived_cl34])).
% 0.50/0.96 thf(zip_derived_cl7, plain,
% 0.50/0.96 (![X0 : $i]:
% 0.50/0.96 ((implies @ (implies @ (not @ X0) @ (not @ truth)) @ X0) = (truth))),
% 0.50/0.97 inference('s_sup+', [status(thm)], [zip_derived_cl0, zip_derived_cl3])).
% 0.50/0.97 thf(zip_derived_cl0, plain, (![X0 : $i]: ((implies @ truth @ X0) = (X0))),
% 0.50/0.97 inference('cnf', [status(esa)], [wajsberg_1])).
% 0.50/0.97 thf(wajsberg_3, axiom,
% 0.50/0.97 (( implies @ ( implies @ X @ Y ) @ Y ) =
% 0.50/0.97 ( implies @ ( implies @ Y @ X ) @ X ))).
% 0.50/0.97 thf(zip_derived_cl2, plain,
% 0.50/0.97 (![X0 : $i, X1 : $i]:
% 0.50/0.97 ((implies @ (implies @ X1 @ X0) @ X0)
% 0.50/0.97 = (implies @ (implies @ X0 @ X1) @ X1))),
% 0.50/0.97 inference('cnf', [status(esa)], [wajsberg_3])).
% 0.50/0.97 thf(zip_derived_cl57, plain,
% 0.50/0.97 (![X0 : $i]:
% 0.50/0.97 ((implies @ X0 @ X0) = (implies @ (implies @ X0 @ truth) @ truth))),
% 0.50/0.97 inference('s_sup+', [status(thm)], [zip_derived_cl0, zip_derived_cl2])).
% 0.50/0.97 thf(zip_derived_cl0, plain, (![X0 : $i]: ((implies @ truth @ X0) = (X0))),
% 0.50/0.97 inference('cnf', [status(esa)], [wajsberg_1])).
% 0.50/0.97 thf(zip_derived_cl1, plain,
% 0.50/0.97 (![X0 : $i, X1 : $i, X2 : $i]:
% 0.50/0.97 ((implies @ (implies @ X0 @ X1) @
% 0.50/0.97 (implies @ (implies @ X1 @ X2) @ (implies @ X0 @ X2))) = (truth))),
% 0.50/0.97 inference('cnf', [status(esa)], [wajsberg_2])).
% 0.50/0.97 thf(zip_derived_cl17, plain,
% 0.50/0.97 (![X0 : $i, X1 : $i]:
% 0.50/0.97 ((implies @ (implies @ truth @ X1) @
% 0.50/0.97 (implies @ (implies @ X1 @ X0) @ X0)) = (truth))),
% 0.50/0.97 inference('s_sup+', [status(thm)], [zip_derived_cl0, zip_derived_cl1])).
% 0.50/0.97 thf(zip_derived_cl0, plain, (![X0 : $i]: ((implies @ truth @ X0) = (X0))),
% 0.50/0.97 inference('cnf', [status(esa)], [wajsberg_1])).
% 0.50/0.97 thf(zip_derived_cl24, plain,
% 0.50/0.97 (![X0 : $i, X1 : $i]:
% 0.50/0.97 ((implies @ X1 @ (implies @ (implies @ X1 @ X0) @ X0)) = (truth))),
% 0.50/0.97 inference('demod', [status(thm)], [zip_derived_cl17, zip_derived_cl0])).
% 0.50/0.97 thf(zip_derived_cl0, plain, (![X0 : $i]: ((implies @ truth @ X0) = (X0))),
% 0.50/0.97 inference('cnf', [status(esa)], [wajsberg_1])).
% 0.50/0.97 thf(zip_derived_cl146, plain,
% 0.50/0.97 (![X0 : $i]: ((truth) = (implies @ (implies @ truth @ X0) @ X0))),
% 0.50/0.97 inference('s_sup+', [status(thm)], [zip_derived_cl24, zip_derived_cl0])).
% 0.50/0.97 thf(zip_derived_cl0, plain, (![X0 : $i]: ((implies @ truth @ X0) = (X0))),
% 0.50/0.97 inference('cnf', [status(esa)], [wajsberg_1])).
% 0.50/0.97 thf(zip_derived_cl181, plain, (![X0 : $i]: ((truth) = (implies @ X0 @ X0))),
% 0.50/0.97 inference('demod', [status(thm)], [zip_derived_cl146, zip_derived_cl0])).
% 0.50/0.97 thf(zip_derived_cl325, plain,
% 0.50/0.97 (![X0 : $i]: ((truth) = (implies @ (implies @ X0 @ truth) @ truth))),
% 0.50/0.97 inference('demod', [status(thm)], [zip_derived_cl57, zip_derived_cl181])).
% 0.50/0.97 thf(zip_derived_cl24, plain,
% 0.50/0.97 (![X0 : $i, X1 : $i]:
% 0.50/0.97 ((implies @ X1 @ (implies @ (implies @ X1 @ X0) @ X0)) = (truth))),
% 0.50/0.97 inference('demod', [status(thm)], [zip_derived_cl17, zip_derived_cl0])).
% 0.50/0.97 thf(zip_derived_cl675, plain,
% 0.50/0.97 (![X0 : $i]: ((implies @ X0 @ truth) = (truth))),
% 0.50/0.97 inference('s_sup+', [status(thm)], [zip_derived_cl325, zip_derived_cl24])).
% 0.50/0.97 thf(zip_derived_cl1, plain,
% 0.50/0.97 (![X0 : $i, X1 : $i, X2 : $i]:
% 0.50/0.97 ((implies @ (implies @ X0 @ X1) @
% 0.50/0.97 (implies @ (implies @ X1 @ X2) @ (implies @ X0 @ X2))) = (truth))),
% 0.50/0.97 inference('cnf', [status(esa)], [wajsberg_2])).
% 0.50/0.97 thf(zip_derived_cl803, plain,
% 0.50/0.97 (![X0 : $i, X1 : $i]:
% 0.50/0.97 ((implies @ truth @
% 0.50/0.97 (implies @ (implies @ truth @ X0) @ (implies @ X1 @ X0))) = (
% 0.50/0.97 truth))),
% 0.50/0.97 inference('s_sup+', [status(thm)], [zip_derived_cl675, zip_derived_cl1])).
% 0.50/0.97 thf(zip_derived_cl0, plain, (![X0 : $i]: ((implies @ truth @ X0) = (X0))),
% 0.50/0.97 inference('cnf', [status(esa)], [wajsberg_1])).
% 0.50/0.97 thf(zip_derived_cl0, plain, (![X0 : $i]: ((implies @ truth @ X0) = (X0))),
% 0.50/0.97 inference('cnf', [status(esa)], [wajsberg_1])).
% 0.50/0.97 thf(zip_derived_cl819, plain,
% 0.50/0.97 (![X0 : $i, X1 : $i]: ((implies @ X0 @ (implies @ X1 @ X0)) = (truth))),
% 0.50/0.97 inference('demod', [status(thm)],
% 0.50/0.97 [zip_derived_cl803, zip_derived_cl0, zip_derived_cl0])).
% 0.50/0.97 thf(zip_derived_cl2, plain,
% 0.50/0.97 (![X0 : $i, X1 : $i]:
% 0.50/0.97 ((implies @ (implies @ X1 @ X0) @ X0)
% 0.50/0.97 = (implies @ (implies @ X0 @ X1) @ X1))),
% 0.50/0.97 inference('cnf', [status(esa)], [wajsberg_3])).
% 0.50/0.97 thf(zip_derived_cl835, plain,
% 0.50/0.97 (![X0 : $i, X1 : $i]:
% 0.50/0.97 ((implies @ (implies @ (implies @ X1 @ X0) @ X0) @ X0)
% 0.50/0.97 = (implies @ truth @ (implies @ X1 @ X0)))),
% 0.50/0.97 inference('s_sup+', [status(thm)], [zip_derived_cl819, zip_derived_cl2])).
% 0.50/0.97 thf(zip_derived_cl0, plain, (![X0 : $i]: ((implies @ truth @ X0) = (X0))),
% 0.50/0.97 inference('cnf', [status(esa)], [wajsberg_1])).
% 0.50/0.97 thf(zip_derived_cl859, plain,
% 0.50/0.97 (![X0 : $i, X1 : $i]:
% 0.50/0.97 ((implies @ (implies @ (implies @ X1 @ X0) @ X0) @ X0)
% 0.50/0.97 = (implies @ X1 @ X0))),
% 0.50/0.97 inference('demod', [status(thm)], [zip_derived_cl835, zip_derived_cl0])).
% 0.50/0.97 thf(zip_derived_cl889, plain,
% 0.50/0.97 (((implies @ truth @ (not @ truth))
% 0.50/0.97 = (implies @ (not @ (not @ truth)) @ (not @ truth)))),
% 0.50/0.97 inference('s_sup+', [status(thm)], [zip_derived_cl7, zip_derived_cl859])).
% 0.50/0.97 thf(zip_derived_cl0, plain, (![X0 : $i]: ((implies @ truth @ X0) = (X0))),
% 0.50/0.97 inference('cnf', [status(esa)], [wajsberg_1])).
% 0.50/0.97 thf(zip_derived_cl903, plain,
% 0.50/0.97 (((not @ truth) = (implies @ (not @ (not @ truth)) @ (not @ truth)))),
% 0.50/0.97 inference('demod', [status(thm)], [zip_derived_cl889, zip_derived_cl0])).
% 0.50/0.97 thf(zip_derived_cl3, plain,
% 0.50/0.97 (![X0 : $i, X1 : $i]:
% 0.50/0.97 ((implies @ (implies @ (not @ X0) @ (not @ X1)) @ (implies @ X1 @ X0))
% 0.50/0.97 = (truth))),
% 0.50/0.97 inference('cnf', [status(esa)], [wajsberg_4])).
% 0.50/0.97 thf(zip_derived_cl916, plain,
% 0.50/0.97 (((implies @
% 0.50/0.97 (implies @ (not @ (not @ truth)) @ (not @ (not @ (not @ truth)))) @
% 0.50/0.97 (not @ truth)) = (truth))),
% 0.50/0.97 inference('s_sup+', [status(thm)], [zip_derived_cl903, zip_derived_cl3])).
% 0.50/0.97 thf(zip_derived_cl7, plain,
% 0.50/0.97 (![X0 : $i]:
% 0.50/0.97 ((implies @ (implies @ (not @ X0) @ (not @ truth)) @ X0) = (truth))),
% 0.50/0.97 inference('s_sup+', [status(thm)], [zip_derived_cl0, zip_derived_cl3])).
% 0.50/0.97 thf(zip_derived_cl2, plain,
% 0.50/0.97 (![X0 : $i, X1 : $i]:
% 0.50/0.97 ((implies @ (implies @ X1 @ X0) @ X0)
% 0.50/0.97 = (implies @ (implies @ X0 @ X1) @ X1))),
% 0.50/0.97 inference('cnf', [status(esa)], [wajsberg_3])).
% 0.50/0.97 thf(zip_derived_cl859, plain,
% 0.50/0.97 (![X0 : $i, X1 : $i]:
% 0.50/0.97 ((implies @ (implies @ (implies @ X1 @ X0) @ X0) @ X0)
% 0.50/0.97 = (implies @ X1 @ X0))),
% 0.50/0.97 inference('demod', [status(thm)], [zip_derived_cl835, zip_derived_cl0])).
% 0.50/0.97 thf(zip_derived_cl886, plain,
% 0.50/0.97 (![X0 : $i, X1 : $i]:
% 0.50/0.97 ((implies @ (implies @ (implies @ X1 @ X0) @ X0) @ X1)
% 0.50/0.97 = (implies @ X0 @ X1))),
% 0.50/0.97 inference('s_sup+', [status(thm)], [zip_derived_cl2, zip_derived_cl859])).
% 0.50/0.97 thf(zip_derived_cl1402, plain,
% 0.50/0.97 (((implies @ truth @ (not @ (not @ truth)))
% 0.50/0.97 = (implies @ (not @ truth) @ (not @ (not @ truth))))),
% 0.50/0.97 inference('s_sup+', [status(thm)], [zip_derived_cl7, zip_derived_cl886])).
% 0.50/0.97 thf(zip_derived_cl0, plain, (![X0 : $i]: ((implies @ truth @ X0) = (X0))),
% 0.50/0.97 inference('cnf', [status(esa)], [wajsberg_1])).
% 0.50/0.97 thf(zip_derived_cl1426, plain,
% 0.50/0.97 (((not @ (not @ truth))
% 0.50/0.97 = (implies @ (not @ truth) @ (not @ (not @ truth))))),
% 0.50/0.97 inference('demod', [status(thm)], [zip_derived_cl1402, zip_derived_cl0])).
% 0.50/0.97 thf(zip_derived_cl3, plain,
% 0.50/0.97 (![X0 : $i, X1 : $i]:
% 0.50/0.97 ((implies @ (implies @ (not @ X0) @ (not @ X1)) @ (implies @ X1 @ X0))
% 0.50/0.97 = (truth))),
% 0.50/0.97 inference('cnf', [status(esa)], [wajsberg_4])).
% 0.50/0.97 thf(zip_derived_cl1461, plain,
% 0.50/0.97 (((implies @
% 0.50/0.97 (implies @ (not @ (not @ (not @ truth))) @ (not @ (not @ truth))) @
% 0.50/0.97 (not @ (not @ truth))) = (truth))),
% 0.50/0.97 inference('s_sup+', [status(thm)], [zip_derived_cl1426, zip_derived_cl3])).
% 0.50/0.97 thf(zip_derived_cl886, plain,
% 0.50/0.97 (![X0 : $i, X1 : $i]:
% 0.50/0.97 ((implies @ (implies @ (implies @ X1 @ X0) @ X0) @ X1)
% 0.50/0.97 = (implies @ X0 @ X1))),
% 0.50/0.97 inference('s_sup+', [status(thm)], [zip_derived_cl2, zip_derived_cl859])).
% 0.50/0.97 thf(zip_derived_cl1504, plain,
% 0.50/0.97 (((implies @ truth @ (not @ (not @ (not @ truth))))
% 0.50/0.97 = (implies @ (not @ (not @ truth)) @ (not @ (not @ (not @ truth)))))),
% 0.50/0.97 inference('s_sup+', [status(thm)],
% 0.50/0.97 [zip_derived_cl1461, zip_derived_cl886])).
% 0.50/0.97 thf(zip_derived_cl0, plain, (![X0 : $i]: ((implies @ truth @ X0) = (X0))),
% 0.50/0.97 inference('cnf', [status(esa)], [wajsberg_1])).
% 0.50/0.97 thf(zip_derived_cl1522, plain,
% 0.50/0.97 (((not @ (not @ (not @ truth)))
% 0.50/0.97 = (implies @ (not @ (not @ truth)) @ (not @ (not @ (not @ truth)))))),
% 0.50/0.97 inference('demod', [status(thm)], [zip_derived_cl1504, zip_derived_cl0])).
% 0.50/0.97 thf(zip_derived_cl1662, plain,
% 0.50/0.97 (((implies @ (not @ (not @ (not @ truth))) @ (not @ truth)) = (truth))),
% 0.50/0.97 inference('demod', [status(thm)], [zip_derived_cl916, zip_derived_cl1522])).
% 0.50/0.97 thf(zip_derived_cl3, plain,
% 0.50/0.97 (![X0 : $i, X1 : $i]:
% 0.50/0.97 ((implies @ (implies @ (not @ X0) @ (not @ X1)) @ (implies @ X1 @ X0))
% 0.50/0.97 = (truth))),
% 0.50/0.97 inference('cnf', [status(esa)], [wajsberg_4])).
% 0.50/0.97 thf(zip_derived_cl1715, plain,
% 0.50/0.97 (((implies @ truth @ (implies @ truth @ (not @ (not @ truth)))) = (truth))),
% 0.50/0.97 inference('s_sup+', [status(thm)], [zip_derived_cl1662, zip_derived_cl3])).
% 0.50/0.97 thf(zip_derived_cl0, plain, (![X0 : $i]: ((implies @ truth @ X0) = (X0))),
% 0.50/0.97 inference('cnf', [status(esa)], [wajsberg_1])).
% 0.50/0.97 thf(zip_derived_cl0, plain, (![X0 : $i]: ((implies @ truth @ X0) = (X0))),
% 0.50/0.97 inference('cnf', [status(esa)], [wajsberg_1])).
% 0.50/0.97 thf(zip_derived_cl1734, plain, (((not @ (not @ truth)) = (truth))),
% 0.50/0.97 inference('demod', [status(thm)],
% 0.50/0.97 [zip_derived_cl1715, zip_derived_cl0, zip_derived_cl0])).
% 0.50/0.97 thf(zip_derived_cl0, plain, (![X0 : $i]: ((implies @ truth @ X0) = (X0))),
% 0.50/0.97 inference('cnf', [status(esa)], [wajsberg_1])).
% 0.50/0.97 thf(zip_derived_cl0, plain, (![X0 : $i]: ((implies @ truth @ X0) = (X0))),
% 0.50/0.97 inference('cnf', [status(esa)], [wajsberg_1])).
% 0.50/0.97 thf(zip_derived_cl1889, plain,
% 0.50/0.97 (![X0 : $i]: ((implies @ (not @ (not @ X0)) @ X0) = (truth))),
% 0.50/0.97 inference('demod', [status(thm)],
% 0.50/0.97 [zip_derived_cl1873, zip_derived_cl1734, zip_derived_cl0,
% 0.50/0.97 zip_derived_cl0])).
% 0.50/0.97 thf(zip_derived_cl1918, plain, (((truth) != (truth))),
% 0.50/0.97 inference('demod', [status(thm)], [zip_derived_cl4, zip_derived_cl1889])).
% 0.50/0.97 thf(zip_derived_cl1919, plain, ($false),
% 0.50/0.97 inference('simplify', [status(thm)], [zip_derived_cl1918])).
% 0.50/0.97
% 0.50/0.97 % SZS output end Refutation
% 0.50/0.97
% 0.50/0.97
% 0.50/0.97 % Terminating...
% 0.50/0.99 % Runner terminated.
% 0.50/1.02 % Zipperpin 1.5 exiting
%------------------------------------------------------------------------------