%------------------------------------------------------------------------------
% File : Zipperpin---2.1.9999
% Problem : CSR019+1 : TPTP v9.2.0. Bugfixed v3.1.0.
% Transfm : none
% Format : tptp:raw
% Command : python3 /export/starexec/sandbox/solver/bin/portfolio.lams.parallel.py %s %d /export/starexec/sandbox/tmp/tmp.WW5tS1f6Iq true
% Computer : n008.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 04:30:51 PM UTC 2025
% Result : Theorem 2.68s 2.96s
% Output : Refutation 2.68s
% Verified :
% SZS Type : -
% Comments :
%------------------------------------------------------------------------------
%----WARNING: Could not form TPTP format derivation
%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.09/0.99 % Problem : CSR019+1 : TPTP v9.2.0. Bugfixed v3.1.0.
% 0.11/1.07 % Command : python3 /export/starexec/sandbox/solver/bin/portfolio.lams.parallel.py %s %d /export/starexec/sandbox/tmp/tmp.WW5tS1f6Iq true
% 0.13/1.36 % Computer : n008.cluster.edu
% 0.13/1.36 % Model : x86_64 x86_64
% 0.13/1.36 % CPU : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz
% 0.13/1.36 % Memory : 8042.1875MB
% 0.13/1.36 % OS : Linux 3.10.0-693.el7.x86_64
% 0.13/1.36 % CPULimit : 300
% 0.13/1.36 % WCLimit : 300
% 0.13/1.36 % DateTime : Wed Oct 1 15:05:39 EDT 2025
% 0.13/1.37 % CPUTime :
% 0.13/1.37 % Running portfolio for 300 s
% 0.13/1.37 % File : /export/starexec/sandbox/benchmark/theBenchmark.p
% 0.15/1.39 % Number of cores: 8
% 0.15/1.40 % Python version: Python 3.6.8
% 0.15/1.42 % Running in FO mode
% 0.37/1.86 % Total configuration time : 435
% 0.37/1.86 % Estimated wc time : 1092
% 0.37/1.86 % Estimated cpu time (7 cpus) : 156.0
% 0.38/2.13 % /export/starexec/sandbox/solver/bin/fo/fo6_bce.sh running for 75s
% 0.38/2.17 % /export/starexec/sandbox/solver/bin/fo/fo3_bce.sh running for 75s
% 0.38/2.23 % /export/starexec/sandbox/solver/bin/fo/fo1_av.sh running for 75s
% 0.38/2.26 % /export/starexec/sandbox/solver/bin/fo/fo13.sh running for 50s
% 0.38/2.28 % /export/starexec/sandbox/solver/bin/fo/fo5.sh running for 50s
% 0.94/2.30 % /export/starexec/sandbox/solver/bin/fo/fo7.sh running for 63s
% 0.94/2.31 % /export/starexec/sandbox/solver/bin/fo/fo4.sh running for 50s
% 1.32/2.59 % /export/starexec/sandbox/solver/bin/fo/fo1_lcnf.sh running for 50s
% 2.68/2.96 % Solved by fo/fo6_bce.sh.
% 2.68/2.96 % BCE start: 135
% 2.68/2.96 % BCE eliminated: 2
% 2.68/2.96 % PE start: 133
% 2.68/2.96 logic: eq
% 2.68/2.96 % PE eliminated: 5
% 2.68/2.96 % done 699 iterations in 0.711s
% 2.68/2.96 % SZS status Theorem for '/export/starexec/sandbox/benchmark/theBenchmark.p'
% 2.68/2.96 % SZS output start Refutation
% 2.68/2.96 thf(zip_tseitin_8_type, type, zip_tseitin_8: $i > $i > $i > $o).
% 2.68/2.96 thf(push_type, type, push: $i).
% 2.68/2.96 thf(backwards_type, type, backwards: $i).
% 2.68/2.96 thf(zip_tseitin_12_type, type, zip_tseitin_12: $i > $i > $o).
% 2.68/2.96 thf(zip_tseitin_6_type, type, zip_tseitin_6: $i > $i > $i > $o).
% 2.68/2.96 thf(initiates_type, type, initiates: $i > $i > $i > $o).
% 2.68/2.96 thf(happens_type, type, happens: $i > $i > $o).
% 2.68/2.96 thf(n1_type, type, n1: $i).
% 2.68/2.96 thf(forwards_type, type, forwards: $i).
% 2.68/2.96 thf(zip_tseitin_3_type, type, zip_tseitin_3: $i > $i > $i > $o).
% 2.68/2.96 thf(n2_type, type, n2: $i).
% 2.68/2.96 thf(pull_type, type, pull: $i).
% 2.68/2.96 thf(zip_tseitin_7_type, type, zip_tseitin_7: $i > $i > $i > $o).
% 2.68/2.96 thf(zip_tseitin_10_type, type, zip_tseitin_10: $i > $i > $o).
% 2.68/2.96 thf(plus_type, type, plus: $i > $i > $i).
% 2.68/2.96 thf(spinning_type, type, spinning: $i).
% 2.68/2.96 thf(holdsAt_type, type, holdsAt: $i > $i > $o).
% 2.68/2.96 thf(n0_type, type, n0: $i).
% 2.68/2.96 thf(terminates_type, type, terminates: $i > $i > $i > $o).
% 2.68/2.96 thf(zip_tseitin_2_type, type, zip_tseitin_2: $i > $i > $i > $o).
% 2.68/2.96 thf(zip_tseitin_11_type, type, zip_tseitin_11: $i > $i > $o).
% 2.68/2.96 thf(zip_tseitin_5_type, type, zip_tseitin_5: $i > $i > $i > $o).
% 2.68/2.96 thf(zip_tseitin_4_type, type, zip_tseitin_4: $i > $i > $i > $o).
% 2.68/2.96 thf(zip_tseitin_9_type, type, zip_tseitin_9: $i > $i > $o).
% 2.68/2.96 thf(terminates_all_defn, axiom,
% 2.68/2.96 (![Event:$i,Fluent:$i,Time:$i]:
% 2.68/2.96 ( ( terminates @ Event @ Fluent @ Time ) <=>
% 2.68/2.96 ( ( ( ~( happens @ push @ Time ) ) & ( ( Fluent ) = ( spinning ) ) &
% 2.68/2.96 ( ( Event ) = ( pull ) ) ) |
% 2.68/2.96 ( ( ~( happens @ pull @ Time ) ) & ( ( Fluent ) = ( spinning ) ) &
% 2.68/2.96 ( ( Event ) = ( push ) ) ) |
% 2.68/2.96 ( ( happens @ push @ Time ) & ( ( Fluent ) = ( backwards ) ) &
% 2.68/2.96 ( ( Event ) = ( pull ) ) ) |
% 2.68/2.96 ( ( happens @ push @ Time ) & ( ( Fluent ) = ( forwards ) ) &
% 2.68/2.96 ( ( Event ) = ( pull ) ) ) |
% 2.68/2.96 ( ( ~( happens @ push @ Time ) ) & ( ( Fluent ) = ( forwards ) ) &
% 2.68/2.96 ( ( Event ) = ( pull ) ) ) |
% 2.68/2.96 ( ( ~( happens @ pull @ Time ) ) & ( ( Fluent ) = ( backwards ) ) &
% 2.68/2.96 ( ( Event ) = ( push ) ) ) ) ))).
% 2.68/2.96 thf(zf_stmt_0, axiom,
% 2.68/2.96 (![Time:$i,Fluent:$i,Event:$i]:
% 2.68/2.96 ( ( zip_tseitin_6 @ Time @ Fluent @ Event ) <=>
% 2.68/2.96 ( ( ( Event ) = ( pull ) ) & ( ( Fluent ) = ( forwards ) ) &
% 2.68/2.96 ( happens @ push @ Time ) ) ))).
% 2.68/2.96 thf(zip_derived_cl56, plain,
% 2.68/2.96 (![X0 : $i, X1 : $i, X2 : $i]:
% 2.68/2.96 ( (zip_tseitin_6 @ X0 @ X1 @ X2)
% 2.68/2.96 | ~ (happens @ push @ X0)
% 2.68/2.96 | ((X1) != (forwards))
% 2.68/2.96 | ((X2) != (pull)))),
% 2.68/2.96 inference('cnf', [status(esa)], [zf_stmt_0])).
% 2.68/2.96 thf(zf_stmt_1, type, zip_tseitin_8 : $i > $i > $i > $o).
% 2.68/2.96 thf(zf_stmt_2, axiom,
% 2.68/2.96 (![Time:$i,Fluent:$i,Event:$i]:
% 2.68/2.96 ( ( zip_tseitin_8 @ Time @ Fluent @ Event ) <=>
% 2.68/2.96 ( ( ( Event ) = ( push ) ) & ( ( Fluent ) = ( backwards ) ) &
% 2.68/2.96 ( ~( happens @ pull @ Time ) ) ) ))).
% 2.68/2.96 thf(zf_stmt_3, type, zip_tseitin_7 : $i > $i > $i > $o).
% 2.68/2.96 thf(zf_stmt_4, axiom,
% 2.68/2.96 (![Time:$i,Fluent:$i,Event:$i]:
% 2.68/2.96 ( ( zip_tseitin_7 @ Time @ Fluent @ Event ) <=>
% 2.68/2.96 ( ( ( Event ) = ( pull ) ) & ( ( Fluent ) = ( forwards ) ) &
% 2.68/2.96 ( ~( happens @ push @ Time ) ) ) ))).
% 2.68/2.96 thf(zf_stmt_5, type, zip_tseitin_6 : $i > $i > $i > $o).
% 2.68/2.96 thf(zf_stmt_6, type, zip_tseitin_5 : $i > $i > $i > $o).
% 2.68/2.96 thf(zf_stmt_7, axiom,
% 2.68/2.96 (![Time:$i,Fluent:$i,Event:$i]:
% 2.68/2.96 ( ( zip_tseitin_5 @ Time @ Fluent @ Event ) <=>
% 2.68/2.96 ( ( ( Event ) = ( pull ) ) & ( ( Fluent ) = ( backwards ) ) &
% 2.68/2.96 ( happens @ push @ Time ) ) ))).
% 2.68/2.96 thf(zf_stmt_8, type, zip_tseitin_4 : $i > $i > $i > $o).
% 2.68/2.96 thf(zf_stmt_9, axiom,
% 2.68/2.96 (![Time:$i,Fluent:$i,Event:$i]:
% 2.68/2.96 ( ( zip_tseitin_4 @ Time @ Fluent @ Event ) <=>
% 2.68/2.96 ( ( ( Event ) = ( push ) ) & ( ( Fluent ) = ( spinning ) ) &
% 2.68/2.96 ( ~( happens @ pull @ Time ) ) ) ))).
% 2.68/2.96 thf(zf_stmt_10, type, zip_tseitin_3 : $i > $i > $i > $o).
% 2.68/2.96 thf(zf_stmt_11, axiom,
% 2.68/2.96 (![Time:$i,Fluent:$i,Event:$i]:
% 2.68/2.96 ( ( zip_tseitin_3 @ Time @ Fluent @ Event ) <=>
% 2.68/2.96 ( ( ( Event ) = ( pull ) ) & ( ( Fluent ) = ( spinning ) ) &
% 2.68/2.96 ( ~( happens @ push @ Time ) ) ) ))).
% 2.68/2.96 thf(zf_stmt_12, axiom,
% 2.68/2.96 (![Event:$i,Fluent:$i,Time:$i]:
% 2.68/2.96 ( ( terminates @ Event @ Fluent @ Time ) <=>
% 2.68/2.96 ( ( zip_tseitin_8 @ Time @ Fluent @ Event ) |
% 2.68/2.96 ( zip_tseitin_7 @ Time @ Fluent @ Event ) |
% 2.68/2.96 ( zip_tseitin_6 @ Time @ Fluent @ Event ) |
% 2.68/2.96 ( zip_tseitin_5 @ Time @ Fluent @ Event ) |
% 2.68/2.96 ( zip_tseitin_4 @ Time @ Fluent @ Event ) |
% 2.68/2.96 ( zip_tseitin_3 @ Time @ Fluent @ Event ) ) ))).
% 2.68/2.96 thf(zip_derived_cl68, plain,
% 2.68/2.96 (![X0 : $i, X1 : $i, X2 : $i]:
% 2.68/2.96 ( (terminates @ X0 @ X1 @ X2) | ~ (zip_tseitin_6 @ X2 @ X1 @ X0))),
% 2.68/2.96 inference('cnf', [status(esa)], [zf_stmt_12])).
% 2.68/2.96 thf(zip_derived_cl985, plain,
% 2.68/2.96 (![X0 : $i, X1 : $i, X2 : $i]:
% 2.68/2.96 (((X0) != (pull))
% 2.68/2.96 | ((X1) != (forwards))
% 2.68/2.96 | ~ (happens @ push @ X2)
% 2.68/2.96 | (terminates @ X0 @ X1 @ X2))),
% 2.68/2.96 inference('s_sup-', [status(thm)], [zip_derived_cl56, zip_derived_cl68])).
% 2.68/2.96 thf(zip_derived_cl60, plain,
% 2.68/2.96 (![X0 : $i, X1 : $i, X2 : $i]:
% 2.68/2.96 ( (zip_tseitin_7 @ X0 @ X1 @ X2)
% 2.68/2.96 | (happens @ push @ X0)
% 2.68/2.96 | ((X1) != (forwards))
% 2.68/2.96 | ((X2) != (pull)))),
% 2.68/2.96 inference('cnf', [status(esa)], [zf_stmt_4])).
% 2.68/2.96 thf(zip_derived_cl67, plain,
% 2.68/2.96 (![X0 : $i, X1 : $i, X2 : $i]:
% 2.68/2.96 ( (terminates @ X0 @ X1 @ X2) | ~ (zip_tseitin_7 @ X2 @ X1 @ X0))),
% 2.68/2.96 inference('cnf', [status(esa)], [zf_stmt_12])).
% 2.68/2.96 thf(zip_derived_cl971, plain,
% 2.68/2.96 (![X0 : $i, X1 : $i, X2 : $i]:
% 2.68/2.96 (((X0) != (pull))
% 2.68/2.96 | ((X1) != (forwards))
% 2.68/2.96 | (happens @ push @ X2)
% 2.68/2.96 | (terminates @ X0 @ X1 @ X2))),
% 2.68/2.96 inference('s_sup-', [status(thm)], [zip_derived_cl60, zip_derived_cl67])).
% 2.68/2.96 thf(zip_derived_cl1520, plain,
% 2.68/2.96 (![X0 : $i, X1 : $i, X2 : $i]:
% 2.68/2.96 ( (terminates @ X0 @ X1 @ X2)
% 2.68/2.96 | ((X1) != (forwards))
% 2.68/2.96 | ((X0) != (pull)))),
% 2.68/2.96 inference('clc', [status(thm)], [zip_derived_cl985, zip_derived_cl971])).
% 2.68/2.96 thf(not_forwards_2, conjecture, (~( holdsAt @ forwards @ n2 ))).
% 2.68/2.96 thf(zf_stmt_13, negated_conjecture, (holdsAt @ forwards @ n2),
% 2.68/2.96 inference('cnf.neg', [status(esa)], [not_forwards_2])).
% 2.68/2.96 thf(zip_derived_cl134, plain, ( (holdsAt @ forwards @ n2)),
% 2.68/2.96 inference('cnf', [status(esa)], [zf_stmt_13])).
% 2.68/2.96 thf(initiates_all_defn, axiom,
% 2.68/2.96 (![Event:$i,Fluent:$i,Time:$i]:
% 2.68/2.96 ( ( initiates @ Event @ Fluent @ Time ) <=>
% 2.68/2.96 ( ( ( happens @ push @ Time ) & ( ( Fluent ) = ( spinning ) ) &
% 2.68/2.96 ( ( Event ) = ( pull ) ) ) |
% 2.68/2.96 ( ( ~( happens @ push @ Time ) ) & ( ( Fluent ) = ( backwards ) ) &
% 2.68/2.96 ( ( Event ) = ( pull ) ) ) |
% 2.68/2.96 ( ( ~( happens @ pull @ Time ) ) & ( ( Fluent ) = ( forwards ) ) &
% 2.68/2.96 ( ( Event ) = ( push ) ) ) ) ))).
% 2.68/2.96 thf(zf_stmt_14, axiom,
% 2.68/2.96 (![Time:$i,Fluent:$i,Event:$i]:
% 2.68/2.96 ( ( zip_tseitin_2 @ Time @ Fluent @ Event ) <=>
% 2.68/2.96 ( ( ( Event ) = ( push ) ) & ( ( Fluent ) = ( forwards ) ) &
% 2.68/2.96 ( ~( happens @ pull @ Time ) ) ) ))).
% 2.68/2.96 thf(zip_derived_cl36, plain,
% 2.68/2.96 (![X0 : $i, X1 : $i, X2 : $i]:
% 2.68/2.96 ( (zip_tseitin_2 @ X0 @ X1 @ X2)
% 2.68/2.96 | (happens @ pull @ X0)
% 2.68/2.96 | ((X1) != (forwards))
% 2.68/2.96 | ((X2) != (push)))),
% 2.68/2.96 inference('cnf', [status(esa)], [zf_stmt_14])).
% 2.68/2.96 thf(happens_all_defn, axiom,
% 2.68/2.96 (![Event:$i,Time:$i]:
% 2.68/2.96 ( ( happens @ Event @ Time ) <=>
% 2.68/2.96 ( ( ( ( Time ) = ( n2 ) ) & ( ( Event ) = ( push ) ) ) |
% 2.68/2.96 ( ( ( Time ) = ( n2 ) ) & ( ( Event ) = ( pull ) ) ) |
% 2.68/2.96 ( ( ( Time ) = ( n1 ) ) & ( ( Event ) = ( pull ) ) ) |
% 2.68/2.96 ( ( ( Time ) = ( n0 ) ) & ( ( Event ) = ( push ) ) ) ) ))).
% 2.68/2.96 thf(zf_stmt_15, axiom,
% 2.68/2.96 (![Time:$i,Event:$i]:
% 2.68/2.96 ( ( zip_tseitin_11 @ Time @ Event ) <=>
% 2.68/2.96 ( ( ( Event ) = ( pull ) ) & ( ( Time ) = ( n1 ) ) ) ))).
% 2.68/2.96 thf(zip_derived_cl81, plain,
% 2.68/2.96 (![X0 : $i, X1 : $i]:
% 2.68/2.96 ( (zip_tseitin_11 @ X0 @ X1) | ((X0) != (n1)) | ((X1) != (pull)))),
% 2.68/2.96 inference('cnf', [status(esa)], [zf_stmt_15])).
% 2.68/2.96 thf(zf_stmt_16, type, zip_tseitin_12 : $i > $i > $o).
% 2.68/2.96 thf(zf_stmt_17, axiom,
% 2.68/2.96 (![Time:$i,Event:$i]:
% 2.68/2.96 ( ( zip_tseitin_12 @ Time @ Event ) <=>
% 2.68/2.96 ( ( ( Event ) = ( push ) ) & ( ( Time ) = ( n0 ) ) ) ))).
% 2.68/2.96 thf(zf_stmt_18, type, zip_tseitin_11 : $i > $i > $o).
% 2.68/2.96 thf(zf_stmt_19, type, zip_tseitin_10 : $i > $i > $o).
% 2.68/2.96 thf(zf_stmt_20, axiom,
% 2.68/2.96 (![Time:$i,Event:$i]:
% 2.68/2.96 ( ( zip_tseitin_10 @ Time @ Event ) <=>
% 2.68/2.96 ( ( ( Event ) = ( pull ) ) & ( ( Time ) = ( n2 ) ) ) ))).
% 2.68/2.96 thf(zf_stmt_21, type, zip_tseitin_9 : $i > $i > $o).
% 2.68/2.96 thf(zf_stmt_22, axiom,
% 2.68/2.96 (![Time:$i,Event:$i]:
% 2.68/2.96 ( ( zip_tseitin_9 @ Time @ Event ) <=>
% 2.68/2.96 ( ( ( Event ) = ( push ) ) & ( ( Time ) = ( n2 ) ) ) ))).
% 2.68/2.96 thf(zf_stmt_23, axiom,
% 2.68/2.96 (![Event:$i,Time:$i]:
% 2.68/2.96 ( ( happens @ Event @ Time ) <=>
% 2.68/2.96 ( ( zip_tseitin_12 @ Time @ Event ) |
% 2.68/2.96 ( zip_tseitin_11 @ Time @ Event ) |
% 2.68/2.96 ( zip_tseitin_10 @ Time @ Event ) | ( zip_tseitin_9 @ Time @ Event ) ) ))).
% 2.68/2.96 thf(zip_derived_cl87, plain,
% 2.68/2.96 (![X0 : $i, X1 : $i]:
% 2.68/2.96 ( (happens @ X0 @ X1) | ~ (zip_tseitin_11 @ X1 @ X0))),
% 2.68/2.96 inference('cnf', [status(esa)], [zf_stmt_23])).
% 2.68/2.96 thf(zip_derived_cl989, plain,
% 2.68/2.96 (![X0 : $i, X1 : $i]:
% 2.68/2.96 (((X0) != (pull)) | ((X1) != (n1)) | (happens @ X0 @ X1))),
% 2.68/2.96 inference('s_sup-', [status(thm)], [zip_derived_cl81, zip_derived_cl87])).
% 2.68/2.96 thf(zip_derived_cl35, plain,
% 2.68/2.96 (![X0 : $i, X1 : $i, X2 : $i]:
% 2.68/2.96 (~ (happens @ pull @ X0) | ~ (zip_tseitin_2 @ X0 @ X1 @ X2))),
% 2.68/2.96 inference('cnf', [status(esa)], [zf_stmt_14])).
% 2.68/2.96 thf(zip_derived_cl1556, plain,
% 2.68/2.96 (![X0 : $i, X1 : $i, X2 : $i]:
% 2.68/2.96 (((X0) != (n1))
% 2.68/2.96 | ((pull) != (pull))
% 2.68/2.96 | ~ (zip_tseitin_2 @ X0 @ X2 @ X1))),
% 2.68/2.96 inference('s_sup-', [status(thm)], [zip_derived_cl989, zip_derived_cl35])).
% 2.68/2.96 thf(zip_derived_cl1560, plain,
% 2.68/2.96 (![X0 : $i, X1 : $i, X2 : $i]:
% 2.68/2.96 (~ (zip_tseitin_2 @ X0 @ X2 @ X1) | ((X0) != (n1)))),
% 2.68/2.96 inference('simplify', [status(thm)], [zip_derived_cl1556])).
% 2.68/2.96 thf(zip_derived_cl1677, plain,
% 2.68/2.96 (![X0 : $i, X1 : $i]: ~ (zip_tseitin_2 @ n1 @ X1 @ X0)),
% 2.68/2.96 inference('eq_res', [status(thm)], [zip_derived_cl1560])).
% 2.68/2.96 thf(zip_derived_cl1686, plain,
% 2.68/2.96 (![X0 : $i, X1 : $i]:
% 2.68/2.96 (((X0) != (push)) | ((X1) != (forwards)) | (happens @ pull @ n1))),
% 2.68/2.96 inference('s_sup-', [status(thm)], [zip_derived_cl36, zip_derived_cl1677])).
% 2.68/2.96 thf(zip_derived_cl1854, plain,
% 2.68/2.96 (![X0 : $i]: ( (happens @ pull @ n1) | ((X0) != (forwards)))),
% 2.68/2.96 inference('eq_res', [status(thm)], [zip_derived_cl1686])).
% 2.68/2.96 thf(zip_derived_cl1930, plain, ( (happens @ pull @ n1)),
% 2.68/2.96 inference('eq_res', [status(thm)], [zip_derived_cl1854])).
% 2.68/2.96 thf(plus1_1, axiom, (( plus @ n1 @ n1 ) = ( n2 ))).
% 2.68/2.96 thf(zip_derived_cl98, plain, (((plus @ n1 @ n1) = (n2))),
% 2.68/2.96 inference('cnf', [status(esa)], [plus1_1])).
% 2.68/2.96 thf(happens_terminates_not_holds, axiom,
% 2.68/2.96 (![Event:$i,Time:$i,Fluent:$i]:
% 2.68/2.96 ( ( ( happens @ Event @ Time ) & ( terminates @ Event @ Fluent @ Time ) ) =>
% 2.68/2.96 ( ~( holdsAt @ Fluent @ ( plus @ Time @ n1 ) ) ) ))).
% 2.68/2.96 thf(zip_derived_cl21, plain,
% 2.68/2.96 (![X0 : $i, X1 : $i, X2 : $i]:
% 2.68/2.96 (~ (happens @ X0 @ X1)
% 2.68/2.96 | ~ (terminates @ X0 @ X2 @ X1)
% 2.68/2.96 | ~ (holdsAt @ X2 @ (plus @ X1 @ n1)))),
% 2.68/2.96 inference('cnf', [status(esa)], [happens_terminates_not_holds])).
% 2.68/2.96 thf(zip_derived_cl906, plain,
% 2.68/2.96 (![X0 : $i, X1 : $i]:
% 2.68/2.96 (~ (happens @ X1 @ n1)
% 2.68/2.96 | ~ (terminates @ X1 @ X0 @ n1)
% 2.68/2.96 | ~ (holdsAt @ X0 @ n2))),
% 2.68/2.96 inference('s_sup-', [status(thm)], [zip_derived_cl98, zip_derived_cl21])).
% 2.68/2.96 thf(zip_derived_cl2321, plain,
% 2.68/2.96 (![X0 : $i]: (~ (terminates @ pull @ X0 @ n1) | ~ (holdsAt @ X0 @ n2))),
% 2.68/2.96 inference('s_sup-', [status(thm)],
% 2.68/2.96 [zip_derived_cl1930, zip_derived_cl906])).
% 2.68/2.96 thf(zip_derived_cl2342, plain, (~ (terminates @ pull @ forwards @ n1)),
% 2.68/2.96 inference('s_sup-', [status(thm)],
% 2.68/2.96 [zip_derived_cl134, zip_derived_cl2321])).
% 2.68/2.96 thf(zip_derived_cl2347, plain,
% 2.68/2.96 ((((pull) != (pull)) | ((forwards) != (forwards)))),
% 2.68/2.96 inference('s_sup-', [status(thm)],
% 2.68/2.96 [zip_derived_cl1520, zip_derived_cl2342])).
% 2.68/2.96 thf(zip_derived_cl2350, plain, ($false),
% 2.68/2.96 inference('simplify', [status(thm)], [zip_derived_cl2347])).
% 2.68/2.96
% 2.68/2.96 % SZS output end Refutation
% 2.68/2.96
% 2.68/2.96
% 2.68/2.96 % Terminating...
% 3.18/3.12 % Runner terminated.
% 3.18/3.13 % Zipperpin 1.5 exiting
%------------------------------------------------------------------------------