%------------------------------------------------------------------------------
% File : Zipperpin---2.1.9999
% Problem : SWC017-1 : TPTP v9.2.0. Released v2.4.0.
% Transfm : none
% Format : tptp:raw
% Command : python3 /export/starexec/sandbox/solver/bin/portfolio.lams.parallel.py %s %d /export/starexec/sandbox/tmp/tmp.ULmX1exhxL true
% Computer : n022.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 04:58:17 PM UTC 2025
% Result : Unsatisfiable 0.53s 0.78s
% Output : Refutation 0.53s
% Verified :
% SZS Type : -
% Comments :
%------------------------------------------------------------------------------
%----WARNING: Could not form TPTP format derivation
%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.02/0.11 % Problem : SWC017-1 : TPTP v9.2.0. Released v2.4.0.
% 0.02/0.13 % Command : python3 /export/starexec/sandbox/solver/bin/portfolio.lams.parallel.py %s %d /export/starexec/sandbox/tmp/tmp.ULmX1exhxL true
% 0.13/0.34 % Computer : n022.cluster.edu
% 0.13/0.34 % Model : x86_64 x86_64
% 0.13/0.34 % CPU : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz
% 0.13/0.34 % Memory : 8042.1875MB
% 0.13/0.34 % OS : Linux 3.10.0-693.el7.x86_64
% 0.13/0.34 % CPULimit : 300
% 0.13/0.34 % WCLimit : 300
% 0.13/0.34 % DateTime : Wed Oct 1 17:12:23 EDT 2025
% 0.13/0.34 % CPUTime :
% 0.13/0.34 % Running portfolio for 300 s
% 0.13/0.34 % File : /export/starexec/sandbox/benchmark/theBenchmark.p
% 0.13/0.34 % Number of cores: 8
% 0.13/0.34 % Python version: Python 3.6.8
% 0.13/0.34 % Running in FO mode
% 0.52/0.63 % Total configuration time : 435
% 0.52/0.63 % Estimated wc time : 1092
% 0.52/0.63 % Estimated cpu time (7 cpus) : 156.0
% 0.52/0.69 % /export/starexec/sandbox/solver/bin/fo/fo3_bce.sh running for 75s
% 0.52/0.70 % /export/starexec/sandbox/solver/bin/fo/fo6_bce.sh running for 75s
% 0.52/0.72 % /export/starexec/sandbox/solver/bin/fo/fo1_av.sh running for 75s
% 0.52/0.72 % /export/starexec/sandbox/solver/bin/fo/fo7.sh running for 63s
% 0.53/0.72 % /export/starexec/sandbox/solver/bin/fo/fo13.sh running for 50s
% 0.53/0.73 % /export/starexec/sandbox/solver/bin/fo/fo5.sh running for 50s
% 0.53/0.74 % /export/starexec/sandbox/solver/bin/fo/fo4.sh running for 50s
% 0.53/0.78 % Solved by fo/fo3_bce.sh.
% 0.53/0.78 % BCE start: 46
% 0.53/0.78 % BCE eliminated: 12
% 0.53/0.78 % PE start: 34
% 0.53/0.78 logic: eq
% 0.53/0.78 % PE eliminated: -4
% 0.53/0.78 % done 40 iterations in 0.038s
% 0.53/0.78 % SZS status Theorem for '/export/starexec/sandbox/benchmark/theBenchmark.p'
% 0.53/0.78 % SZS output start Refutation
% 0.53/0.78 thf(nil_type, type, nil: $i).
% 0.53/0.78 thf(frontsegP_type, type, frontsegP: $i > $i > $o).
% 0.53/0.78 thf(sk2_type, type, sk2: $i).
% 0.53/0.78 thf(sk4_type, type, sk4: $i).
% 0.53/0.78 thf(sk3_type, type, sk3: $i).
% 0.53/0.78 thf(neq_type, type, neq: $i > $i > $o).
% 0.53/0.78 thf(ssList_type, type, ssList: $i > $o).
% 0.53/0.78 thf(sk1_type, type, sk1: $i).
% 0.53/0.78 thf(clause60, axiom, (( ~( ssList @ U ) ) | ( frontsegP @ U @ nil ))).
% 0.53/0.78 thf(zip_derived_cl1, plain,
% 0.53/0.78 (![X0 : $i]: (~ (ssList @ X0) | (frontsegP @ X0 @ nil))),
% 0.53/0.78 inference('cnf', [status(esa)], [clause60])).
% 0.53/0.78 thf(co1_14, conjecture,
% 0.53/0.78 (~( ( frontsegP @ sk4 @ sk3 ) | ( ( nil ) = ( sk3 ) ) ))).
% 0.53/0.78 thf(zf_stmt_0, negated_conjecture,
% 0.53/0.78 (( frontsegP @ sk4 @ sk3 ) | ( ( nil ) = ( sk3 ) )),
% 0.53/0.78 inference('cnf.neg', [status(esa)], [co1_14])).
% 0.53/0.78 thf(zip_derived_cl32, plain, (( (frontsegP @ sk4 @ sk3) | ((nil) = (sk3)))),
% 0.53/0.78 inference('cnf', [status(esa)], [zf_stmt_0])).
% 0.53/0.78 thf(co1_5, conjecture, (( sk2 ) != ( sk4 ))).
% 0.53/0.78 thf(zf_stmt_1, negated_conjecture, (( sk2 ) = ( sk4 )),
% 0.53/0.78 inference('cnf.neg', [status(esa)], [co1_5])).
% 0.53/0.78 thf(zip_derived_cl41, plain, (((sk2) = (sk4))),
% 0.53/0.78 inference('cnf', [status(esa)], [zf_stmt_1])).
% 0.53/0.78 thf(co1_6, conjecture, (( sk1 ) != ( sk3 ))).
% 0.53/0.78 thf(zf_stmt_2, negated_conjecture, (( sk1 ) = ( sk3 )),
% 0.53/0.78 inference('cnf.neg', [status(esa)], [co1_6])).
% 0.53/0.78 thf(zip_derived_cl40, plain, (((sk1) = (sk3))),
% 0.53/0.78 inference('cnf', [status(esa)], [zf_stmt_2])).
% 0.53/0.78 thf(zip_derived_cl40, plain, (((sk1) = (sk3))),
% 0.53/0.78 inference('cnf', [status(esa)], [zf_stmt_2])).
% 0.53/0.78 thf(zip_derived_cl267, plain, (( (frontsegP @ sk2 @ sk1) | ((nil) = (sk1)))),
% 0.53/0.78 inference('demod', [status(thm)],
% 0.53/0.78 [zip_derived_cl32, zip_derived_cl41, zip_derived_cl40,
% 0.53/0.78 zip_derived_cl40])).
% 0.53/0.78 thf(clause129, axiom,
% 0.53/0.78 (( ~( frontsegP @ U @ V ) ) | ( ~( frontsegP @ V @ U ) ) |
% 0.53/0.78 ( ~( ssList @ U ) ) | ( ~( ssList @ V ) ) | ( ( V ) = ( U ) ))).
% 0.53/0.78 thf(zip_derived_cl18, plain,
% 0.53/0.78 (![X0 : $i, X1 : $i]:
% 0.53/0.78 (~ (frontsegP @ X0 @ X1)
% 0.53/0.78 | ~ (frontsegP @ X1 @ X0)
% 0.53/0.78 | ~ (ssList @ X0)
% 0.53/0.78 | ~ (ssList @ X1)
% 0.53/0.78 | ((X1) = (X0)))),
% 0.53/0.78 inference('cnf', [status(esa)], [clause129])).
% 0.53/0.78 thf(zip_derived_cl296, plain,
% 0.53/0.78 ((((nil) = (sk1))
% 0.53/0.78 | ((sk1) = (sk2))
% 0.53/0.78 | ~ (ssList @ sk1)
% 0.53/0.78 | ~ (ssList @ sk2)
% 0.53/0.78 | ~ (frontsegP @ sk1 @ sk2))),
% 0.53/0.78 inference('sup-', [status(thm)], [zip_derived_cl267, zip_derived_cl18])).
% 0.53/0.78 thf(co1_3, conjecture, (~( ssList @ sk3 ))).
% 0.53/0.78 thf(zf_stmt_3, negated_conjecture, (ssList @ sk3),
% 0.53/0.78 inference('cnf.neg', [status(esa)], [co1_3])).
% 0.53/0.78 thf(zip_derived_cl43, plain, ( (ssList @ sk3)),
% 0.53/0.78 inference('cnf', [status(esa)], [zf_stmt_3])).
% 0.53/0.78 thf(zip_derived_cl40, plain, (((sk1) = (sk3))),
% 0.53/0.78 inference('cnf', [status(esa)], [zf_stmt_2])).
% 0.53/0.78 thf(zip_derived_cl256, plain, ( (ssList @ sk1)),
% 0.53/0.78 inference('demod', [status(thm)], [zip_derived_cl43, zip_derived_cl40])).
% 0.53/0.78 thf(co1_4, conjecture, (~( ssList @ sk4 ))).
% 0.53/0.78 thf(zf_stmt_4, negated_conjecture, (ssList @ sk4),
% 0.53/0.78 inference('cnf.neg', [status(esa)], [co1_4])).
% 0.53/0.78 thf(zip_derived_cl42, plain, ( (ssList @ sk4)),
% 0.53/0.78 inference('cnf', [status(esa)], [zf_stmt_4])).
% 0.53/0.78 thf(zip_derived_cl41, plain, (((sk2) = (sk4))),
% 0.53/0.78 inference('cnf', [status(esa)], [zf_stmt_1])).
% 0.53/0.78 thf(zip_derived_cl255, plain, ( (ssList @ sk2)),
% 0.53/0.78 inference('demod', [status(thm)], [zip_derived_cl42, zip_derived_cl41])).
% 0.53/0.78 thf(zip_derived_cl305, plain,
% 0.53/0.78 ((((nil) = (sk1)) | ((sk1) = (sk2)) | ~ (frontsegP @ sk1 @ sk2))),
% 0.53/0.78 inference('demod', [status(thm)],
% 0.53/0.78 [zip_derived_cl296, zip_derived_cl256, zip_derived_cl255])).
% 0.53/0.78 thf(co1_11, conjecture, (~( ( neq @ sk3 @ nil ) | ( ( nil ) = ( sk4 ) ) ))).
% 0.53/0.78 thf(zf_stmt_5, negated_conjecture,
% 0.53/0.78 (( neq @ sk3 @ nil ) | ( ( nil ) = ( sk4 ) )),
% 0.53/0.78 inference('cnf.neg', [status(esa)], [co1_11])).
% 0.53/0.78 thf(zip_derived_cl35, plain, (( (neq @ sk3 @ nil) | ((nil) = (sk4)))),
% 0.53/0.78 inference('cnf', [status(esa)], [zf_stmt_5])).
% 0.53/0.78 thf(clause115, axiom,
% 0.53/0.78 (( ( U ) != ( V ) ) | ( ~( neq @ U @ V ) ) | ( ~( ssList @ V ) ) |
% 0.53/0.78 ( ~( ssList @ U ) ))).
% 0.53/0.78 thf(zip_derived_cl13, plain,
% 0.53/0.78 (![X0 : $i, X1 : $i]:
% 0.53/0.78 (((X1) != (X0))
% 0.53/0.78 | ~ (neq @ X1 @ X0)
% 0.53/0.78 | ~ (ssList @ X0)
% 0.53/0.78 | ~ (ssList @ X1))),
% 0.53/0.78 inference('cnf', [status(esa)], [clause115])).
% 0.53/0.78 thf(zip_derived_cl234, plain,
% 0.53/0.78 ((((nil) = (sk4))
% 0.53/0.78 | ~ (ssList @ sk3)
% 0.53/0.78 | ~ (ssList @ nil)
% 0.53/0.78 | ((sk3) != (nil)))),
% 0.53/0.78 inference('dp-resolution', [status(thm)],
% 0.53/0.78 [zip_derived_cl35, zip_derived_cl13])).
% 0.53/0.78 thf(zip_derived_cl269, plain,
% 0.53/0.78 ((((nil) = (sk4)) | ~ (ssList @ nil) | ((sk3) != (nil)))),
% 0.53/0.78 inference('local_rewriting', [status(thm)], [zip_derived_cl234])).
% 0.53/0.78 thf(zip_derived_cl41, plain, (((sk2) = (sk4))),
% 0.53/0.78 inference('cnf', [status(esa)], [zf_stmt_1])).
% 0.53/0.78 thf(clause8, axiom, (ssList @ nil)).
% 0.53/0.78 thf(zip_derived_cl0, plain, ( (ssList @ nil)),
% 0.53/0.78 inference('cnf', [status(esa)], [clause8])).
% 0.53/0.78 thf(zip_derived_cl40, plain, (((sk1) = (sk3))),
% 0.53/0.78 inference('cnf', [status(esa)], [zf_stmt_2])).
% 0.53/0.78 thf(zip_derived_cl270, plain, ((((nil) = (sk2)) | ((sk1) != (nil)))),
% 0.53/0.78 inference('demod', [status(thm)],
% 0.53/0.78 [zip_derived_cl269, zip_derived_cl41, zip_derived_cl0,
% 0.53/0.78 zip_derived_cl40])).
% 0.53/0.78 thf(co1_9, conjecture, (~( ( neq @ sk2 @ nil ) | ( ( nil ) != ( sk1 ) ) ))).
% 0.53/0.78 thf(zf_stmt_6, negated_conjecture,
% 0.53/0.78 (( neq @ sk2 @ nil ) | ( ( nil ) != ( sk1 ) )),
% 0.53/0.78 inference('cnf.neg', [status(esa)], [co1_9])).
% 0.53/0.78 thf(zip_derived_cl37, plain, (( (neq @ sk2 @ nil) | ((nil) != (sk1)))),
% 0.53/0.78 inference('cnf', [status(esa)], [zf_stmt_6])).
% 0.53/0.78 thf(zip_derived_cl13, plain,
% 0.53/0.78 (![X0 : $i, X1 : $i]:
% 0.53/0.78 (((X1) != (X0))
% 0.53/0.78 | ~ (neq @ X1 @ X0)
% 0.53/0.78 | ~ (ssList @ X0)
% 0.53/0.78 | ~ (ssList @ X1))),
% 0.53/0.78 inference('cnf', [status(esa)], [clause115])).
% 0.53/0.78 thf(zip_derived_cl241, plain,
% 0.53/0.78 ((((nil) != (sk1))
% 0.53/0.78 | ~ (ssList @ sk2)
% 0.53/0.78 | ~ (ssList @ nil)
% 0.53/0.78 | ((sk2) != (nil)))),
% 0.53/0.78 inference('dp-resolution', [status(thm)],
% 0.53/0.78 [zip_derived_cl37, zip_derived_cl13])).
% 0.53/0.78 thf(zip_derived_cl257, plain,
% 0.53/0.78 ((((nil) != (sk1)) | ~ (ssList @ nil) | ((sk2) != (nil)))),
% 0.53/0.78 inference('local_rewriting', [status(thm)], [zip_derived_cl241])).
% 0.53/0.78 thf(zip_derived_cl0, plain, ( (ssList @ nil)),
% 0.53/0.78 inference('cnf', [status(esa)], [clause8])).
% 0.53/0.78 thf(zip_derived_cl258, plain, ((((nil) != (sk1)) | ((sk2) != (nil)))),
% 0.53/0.78 inference('demod', [status(thm)], [zip_derived_cl257, zip_derived_cl0])).
% 0.53/0.78 thf(zip_derived_cl271, plain, (((sk1) != (nil))),
% 0.53/0.78 inference('clc', [status(thm)], [zip_derived_cl270, zip_derived_cl258])).
% 0.53/0.78 thf(zip_derived_cl306, plain,
% 0.53/0.78 ((((sk1) = (sk2)) | ~ (frontsegP @ sk1 @ sk2))),
% 0.53/0.78 inference('simplify_reflect-', [status(thm)],
% 0.53/0.78 [zip_derived_cl305, zip_derived_cl271])).
% 0.53/0.78 thf(clause61, axiom, (( ~( ssList @ U ) ) | ( frontsegP @ U @ U ))).
% 0.53/0.78 thf(zip_derived_cl2, plain,
% 0.53/0.78 (![X0 : $i]: (~ (ssList @ X0) | (frontsegP @ X0 @ X0))),
% 0.53/0.78 inference('cnf', [status(esa)], [clause61])).
% 0.53/0.78 thf(co1_13, conjecture, (~( ( neq @ sk3 @ nil ) | ( ( nil ) = ( sk3 ) ) ))).
% 0.53/0.78 thf(zf_stmt_7, negated_conjecture,
% 0.53/0.78 (( neq @ sk3 @ nil ) | ( ( nil ) = ( sk3 ) )),
% 0.53/0.78 inference('cnf.neg', [status(esa)], [co1_13])).
% 0.53/0.78 thf(zip_derived_cl33, plain, (( (neq @ sk3 @ nil) | ((nil) = (sk3)))),
% 0.53/0.78 inference('cnf', [status(esa)], [zf_stmt_7])).
% 0.53/0.78 thf(co1_8, conjecture,
% 0.53/0.78 (~( ( ~( frontsegP @ sk1 @ A ) ) | ( ~( frontsegP @ sk2 @ A ) ) |
% 0.53/0.78 ( ~( neq @ A @ nil ) ) | ( ~( ssList @ A ) ) | ( ( nil ) = ( sk2 ) ) ))).
% 0.53/0.78 thf(zf_stmt_8, negated_conjecture,
% 0.53/0.78 (( ~( frontsegP @ sk1 @ A ) ) | ( ~( frontsegP @ sk2 @ A ) ) |
% 0.53/0.78 ( ~( neq @ A @ nil ) ) | ( ~( ssList @ A ) ) | ( ( nil ) = ( sk2 ) )),
% 0.53/0.78 inference('cnf.neg', [status(esa)], [co1_8])).
% 0.53/0.78 thf(zip_derived_cl38, plain,
% 0.53/0.78 (![X0 : $i]:
% 0.53/0.78 (~ (frontsegP @ sk1 @ X0)
% 0.53/0.78 | ~ (frontsegP @ sk2 @ X0)
% 0.53/0.78 | ~ (neq @ X0 @ nil)
% 0.53/0.78 | ~ (ssList @ X0)
% 0.53/0.78 | ((nil) = (sk2)))),
% 0.53/0.78 inference('cnf', [status(esa)], [zf_stmt_8])).
% 0.53/0.78 thf(zip_derived_cl233, plain,
% 0.53/0.78 (![X0 : $i]:
% 0.53/0.78 (((sk3) != (X0))
% 0.53/0.78 | ((nil) != (nil))
% 0.53/0.78 | ((nil) = (sk3))
% 0.53/0.78 | ((nil) = (sk2))
% 0.53/0.78 | ~ (ssList @ X0)
% 0.53/0.78 | ~ (frontsegP @ sk2 @ X0)
% 0.53/0.78 | ~ (frontsegP @ sk1 @ X0))),
% 0.53/0.78 inference('dp-resolution', [status(thm)],
% 0.53/0.78 [zip_derived_cl33, zip_derived_cl38])).
% 0.53/0.78 thf(zip_derived_cl398, plain,
% 0.53/0.78 (![X0 : $i]:
% 0.53/0.78 (~ (frontsegP @ sk1 @ X0)
% 0.53/0.78 | ~ (frontsegP @ sk2 @ X0)
% 0.53/0.78 | ~ (ssList @ X0)
% 0.53/0.78 | ((nil) = (sk2))
% 0.53/0.78 | ((nil) = (sk3))
% 0.53/0.78 | ((sk3) != (X0)))),
% 0.53/0.78 inference('simplify', [status(thm)], [zip_derived_cl233])).
% 0.53/0.78 thf(zip_derived_cl40, plain, (((sk1) = (sk3))),
% 0.53/0.78 inference('cnf', [status(esa)], [zf_stmt_2])).
% 0.53/0.78 thf(zip_derived_cl40, plain, (((sk1) = (sk3))),
% 0.53/0.78 inference('cnf', [status(esa)], [zf_stmt_2])).
% 0.53/0.78 thf(zip_derived_cl399, plain,
% 0.53/0.78 (![X0 : $i]:
% 0.53/0.78 (~ (frontsegP @ sk1 @ X0)
% 0.53/0.78 | ~ (frontsegP @ sk2 @ X0)
% 0.53/0.78 | ~ (ssList @ X0)
% 0.53/0.78 | ((nil) = (sk2))
% 0.53/0.78 | ((nil) = (sk1))
% 0.53/0.78 | ((sk1) != (X0)))),
% 0.53/0.78 inference('demod', [status(thm)],
% 0.53/0.78 [zip_derived_cl398, zip_derived_cl40, zip_derived_cl40])).
% 0.53/0.78 thf(zip_derived_cl271, plain, (((sk1) != (nil))),
% 0.53/0.78 inference('clc', [status(thm)], [zip_derived_cl270, zip_derived_cl258])).
% 0.53/0.78 thf(zip_derived_cl400, plain,
% 0.53/0.78 (![X0 : $i]:
% 0.53/0.78 (~ (frontsegP @ sk1 @ X0)
% 0.53/0.78 | ~ (frontsegP @ sk2 @ X0)
% 0.53/0.78 | ~ (ssList @ X0)
% 0.53/0.78 | ((nil) = (sk2))
% 0.53/0.78 | ((sk1) != (X0)))),
% 0.53/0.78 inference('simplify_reflect-', [status(thm)],
% 0.53/0.78 [zip_derived_cl399, zip_derived_cl271])).
% 0.53/0.78 thf(zip_derived_cl267, plain, (( (frontsegP @ sk2 @ sk1) | ((nil) = (sk1)))),
% 0.53/0.78 inference('demod', [status(thm)],
% 0.53/0.78 [zip_derived_cl32, zip_derived_cl41, zip_derived_cl40,
% 0.53/0.78 zip_derived_cl40])).
% 0.53/0.78 thf(clause154, axiom,
% 0.53/0.78 (( ~( frontsegP @ U @ V ) ) | ( ~( frontsegP @ V @ W ) ) |
% 0.53/0.78 ( ~( ssList @ W ) ) | ( ~( ssList @ V ) ) | ( ~( ssList @ U ) ) |
% 0.53/0.78 ( frontsegP @ U @ W ))).
% 0.53/0.78 thf(zip_derived_cl25, plain,
% 0.53/0.78 (![X0 : $i, X1 : $i, X2 : $i]:
% 0.53/0.78 (~ (frontsegP @ X0 @ X1)
% 0.53/0.78 | ~ (frontsegP @ X1 @ X2)
% 0.53/0.78 | ~ (ssList @ X2)
% 0.53/0.78 | ~ (ssList @ X1)
% 0.53/0.78 | ~ (ssList @ X0)
% 0.53/0.78 | (frontsegP @ X0 @ X2))),
% 0.53/0.78 inference('cnf', [status(esa)], [clause154])).
% 0.53/0.78 thf(zip_derived_cl363, plain,
% 0.53/0.78 (![X0 : $i]:
% 0.53/0.78 (((nil) = (sk1))
% 0.53/0.78 | (frontsegP @ sk2 @ X0)
% 0.53/0.78 | ~ (ssList @ sk2)
% 0.53/0.78 | ~ (ssList @ sk1)
% 0.53/0.78 | ~ (ssList @ X0)
% 0.53/0.78 | ~ (frontsegP @ sk1 @ X0))),
% 0.53/0.78 inference('sup-', [status(thm)], [zip_derived_cl267, zip_derived_cl25])).
% 0.53/0.78 thf(zip_derived_cl255, plain, ( (ssList @ sk2)),
% 0.53/0.78 inference('demod', [status(thm)], [zip_derived_cl42, zip_derived_cl41])).
% 0.53/0.78 thf(zip_derived_cl256, plain, ( (ssList @ sk1)),
% 0.53/0.78 inference('demod', [status(thm)], [zip_derived_cl43, zip_derived_cl40])).
% 0.53/0.78 thf(zip_derived_cl374, plain,
% 0.53/0.78 (![X0 : $i]:
% 0.53/0.78 (((nil) = (sk1))
% 0.53/0.78 | (frontsegP @ sk2 @ X0)
% 0.53/0.78 | ~ (ssList @ X0)
% 0.53/0.78 | ~ (frontsegP @ sk1 @ X0))),
% 0.53/0.78 inference('demod', [status(thm)],
% 0.53/0.78 [zip_derived_cl363, zip_derived_cl255, zip_derived_cl256])).
% 0.53/0.78 thf(zip_derived_cl271, plain, (((sk1) != (nil))),
% 0.53/0.78 inference('clc', [status(thm)], [zip_derived_cl270, zip_derived_cl258])).
% 0.53/0.78 thf(zip_derived_cl375, plain,
% 0.53/0.78 (![X0 : $i]:
% 0.53/0.78 ( (frontsegP @ sk2 @ X0) | ~ (ssList @ X0) | ~ (frontsegP @ sk1 @ X0))),
% 0.53/0.78 inference('simplify_reflect-', [status(thm)],
% 0.53/0.78 [zip_derived_cl374, zip_derived_cl271])).
% 0.53/0.78 thf(zip_derived_cl401, plain,
% 0.53/0.78 (![X0 : $i]:
% 0.53/0.78 (((sk1) != (X0))
% 0.53/0.78 | ((nil) = (sk2))
% 0.53/0.78 | ~ (ssList @ X0)
% 0.53/0.78 | ~ (frontsegP @ sk1 @ X0))),
% 0.53/0.78 inference('clc', [status(thm)], [zip_derived_cl400, zip_derived_cl375])).
% 0.53/0.78 thf(zip_derived_cl404, plain,
% 0.53/0.78 ((~ (ssList @ sk1)
% 0.53/0.78 | ~ (ssList @ sk1)
% 0.53/0.78 | ((nil) = (sk2))
% 0.53/0.78 | ((sk1) != (sk1)))),
% 0.53/0.78 inference('sup-', [status(thm)], [zip_derived_cl2, zip_derived_cl401])).
% 0.53/0.78 thf(zip_derived_cl256, plain, ( (ssList @ sk1)),
% 0.53/0.78 inference('demod', [status(thm)], [zip_derived_cl43, zip_derived_cl40])).
% 0.53/0.78 thf(zip_derived_cl256, plain, ( (ssList @ sk1)),
% 0.53/0.78 inference('demod', [status(thm)], [zip_derived_cl43, zip_derived_cl40])).
% 0.53/0.78 thf(zip_derived_cl406, plain, ((((nil) = (sk2)) | ((sk1) != (sk1)))),
% 0.53/0.78 inference('demod', [status(thm)],
% 0.53/0.78 [zip_derived_cl404, zip_derived_cl256, zip_derived_cl256])).
% 0.53/0.78 thf(zip_derived_cl407, plain, (((nil) = (sk2))),
% 0.53/0.78 inference('simplify', [status(thm)], [zip_derived_cl406])).
% 0.53/0.78 thf(zip_derived_cl407, plain, (((nil) = (sk2))),
% 0.53/0.78 inference('simplify', [status(thm)], [zip_derived_cl406])).
% 0.53/0.78 thf(zip_derived_cl416, plain,
% 0.53/0.78 ((((sk1) = (nil)) | ~ (frontsegP @ sk1 @ nil))),
% 0.53/0.78 inference('demod', [status(thm)],
% 0.53/0.78 [zip_derived_cl306, zip_derived_cl407, zip_derived_cl407])).
% 0.53/0.78 thf(zip_derived_cl271, plain, (((sk1) != (nil))),
% 0.53/0.78 inference('clc', [status(thm)], [zip_derived_cl270, zip_derived_cl258])).
% 0.53/0.78 thf(zip_derived_cl417, plain, (~ (frontsegP @ sk1 @ nil)),
% 0.53/0.78 inference('simplify_reflect-', [status(thm)],
% 0.53/0.78 [zip_derived_cl416, zip_derived_cl271])).
% 0.53/0.78 thf(zip_derived_cl433, plain, (~ (ssList @ sk1)),
% 0.53/0.78 inference('sup-', [status(thm)], [zip_derived_cl1, zip_derived_cl417])).
% 0.53/0.78 thf(zip_derived_cl256, plain, ( (ssList @ sk1)),
% 0.53/0.78 inference('demod', [status(thm)], [zip_derived_cl43, zip_derived_cl40])).
% 0.53/0.78 thf(zip_derived_cl434, plain, ($false),
% 0.53/0.78 inference('demod', [status(thm)], [zip_derived_cl433, zip_derived_cl256])).
% 0.53/0.78
% 0.53/0.78 % SZS output end Refutation
% 0.53/0.78
% 0.53/0.78
% 0.53/0.78 % Terminating...
% 0.53/0.83 % Runner terminated.
% 1.67/0.85 % Zipperpin 1.5 exiting
%------------------------------------------------------------------------------