%------------------------------------------------------------------------------
% File : Zipperpin---2.1.9999
% Problem : CSR109+3 : TPTP v9.2.0. Bugfixed v7.3.0.
% Transfm : none
% Format : tptp:raw
% Command : python3 /export/starexec/sandbox2/solver/bin/portfolio.lams.parallel.py %s %d /export/starexec/sandbox2/tmp/tmp.tKTcXyNUTQ 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 04:31:47 PM UTC 2025
% Result : Theorem 27.80s 4.58s
% Output : Refutation 27.80s
% Verified :
% SZS Type : Refutation
% Derivation depth : 15
% Number of leaves : 5
% Syntax : Number of formulae : 75 ( 37 unt; 0 typ; 0 def)
% Number of atoms : 152 ( 0 equ; 0 cnn)
% Maximal formula atoms : 22 ( 2 avg)
% Number of connectives : 441 ( 62 ~; 50 |; 23 &; 302 @)
% ( 0 <=>; 4 =>; 0 <=; 0 <~>)
% Maximal formula depth : 34 ( 5 avg)
% Number of types : 2 ( 0 usr)
% Number of type conns : 0 ( 0 >; 0 *; 0 +; 0 <<)
% Number of symbols : 17 ( 16 usr; 15 con; 0-2 aty)
% Number of variables : 65 ( 0 ^; 55 !; 10 ?; 65 :)
% Comments :
%------------------------------------------------------------------------------
thf(s__Creature50_1_type,type,
s__Creature50_1: $i ).
thf(sk__9_type,type,
sk__9: $i ).
thf(s__Reptile_type,type,
s__Reptile: $i ).
thf(sk__10_type,type,
sk__10: $i ).
thf(sk__8_type,type,
sk__8: $i ).
thf(s__instance_type,type,
s__instance: $i > $i > $o ).
thf(sk__16_type,type,
sk__16: $i ).
thf(s__Animal_type,type,
s__Animal: $i ).
thf(s__SetOrClass_type,type,
s__SetOrClass: $i ).
thf(sk__11_type,type,
sk__11: $i ).
thf(sk__15_type,type,
sk__15: $i ).
thf(s__subclass_type,type,
s__subclass: $i > $i > $o ).
thf(sk__17_type,type,
sk__17: $i ).
thf(sk__14_type,type,
sk__14: $i ).
thf(sk__13_type,type,
sk__13: $i ).
thf(sk__12_type,type,
sk__12: $i ).
thf(local_2,axiom,
( ( s__subclass @ s__Reptile @ s__Animal )
=> ? [V_C1: $i,V_C2: $i,V_C3: $i,V_C4: $i,V_C5: $i,V_C6: $i,V_C7: $i,V_C8: $i,V_C9: $i,V_C10: $i] :
( ( s__instance @ s__Creature50_1 @ V_C1 )
& ( s__subclass @ V_C10 @ s__Reptile )
& ( s__subclass @ V_C9 @ V_C10 )
& ( s__subclass @ V_C8 @ V_C9 )
& ( s__subclass @ V_C7 @ V_C8 )
& ( s__subclass @ V_C6 @ V_C7 )
& ( s__subclass @ V_C5 @ V_C6 )
& ( s__subclass @ V_C4 @ V_C5 )
& ( s__subclass @ V_C3 @ V_C4 )
& ( s__subclass @ V_C2 @ V_C3 )
& ( s__subclass @ V_C1 @ V_C2 )
& ( s__instance @ V_C10 @ s__SetOrClass )
& ( s__instance @ V_C9 @ s__SetOrClass )
& ( s__instance @ V_C8 @ s__SetOrClass )
& ( s__instance @ V_C7 @ s__SetOrClass )
& ( s__instance @ V_C6 @ s__SetOrClass )
& ( s__instance @ V_C5 @ s__SetOrClass )
& ( s__instance @ V_C4 @ s__SetOrClass )
& ( s__instance @ V_C3 @ s__SetOrClass )
& ( s__instance @ V_C2 @ s__SetOrClass )
& ( s__instance @ V_C1 @ s__SetOrClass ) ) ) ).
thf(zip_derived_cl337,plain,
( ( s__subclass @ sk__8 @ sk__9 )
| ~ ( s__subclass @ s__Reptile @ s__Animal ) ),
inference(cnf,[status(esa)],[local_2]) ).
thf(kb_SUMO_59871,axiom,
s__subclass @ s__Reptile @ s__Animal ).
thf(zip_derived_cl274,plain,
s__subclass @ s__Reptile @ s__Animal,
inference(cnf,[status(esa)],[kb_SUMO_59871]) ).
thf(zip_derived_cl948,plain,
s__subclass @ sk__8 @ sk__9,
inference(demod,[status(thm)],[zip_derived_cl337,zip_derived_cl274]) ).
thf(kb_SUMO_26636,axiom,
! [V__X: $i,V__Y: $i,V__Z: $i] :
( ( ( s__instance @ V__Y @ s__SetOrClass )
& ( s__instance @ V__X @ s__SetOrClass ) )
=> ( ( ( s__subclass @ V__X @ V__Y )
& ( s__instance @ V__Z @ V__X ) )
=> ( s__instance @ V__Z @ V__Y ) ) ) ).
thf(zip_derived_cl29,plain,
! [X0: $i,X1: $i,X2: $i] :
( ~ ( s__subclass @ X0 @ X1 )
| ~ ( s__instance @ X0 @ s__SetOrClass )
| ~ ( s__instance @ X1 @ s__SetOrClass )
| ( s__instance @ X2 @ X1 )
| ~ ( s__instance @ X2 @ X0 ) ),
inference(cnf,[status(esa)],[kb_SUMO_26636]) ).
thf(kb_SUMO_26635,axiom,
! [V__X: $i,V__Y: $i] :
( ( s__subclass @ V__X @ V__Y )
=> ( ( s__instance @ V__X @ s__SetOrClass )
& ( s__instance @ V__Y @ s__SetOrClass ) ) ) ).
thf(zip_derived_cl27,plain,
! [X0: $i,X1: $i] :
( ( s__instance @ X0 @ s__SetOrClass )
| ~ ( s__subclass @ X0 @ X1 ) ),
inference(cnf,[status(esa)],[kb_SUMO_26635]) ).
thf(zip_derived_cl1536,plain,
! [X0: $i,X1: $i,X2: $i] :
( ~ ( s__instance @ X2 @ X0 )
| ( s__instance @ X2 @ X1 )
| ~ ( s__instance @ X1 @ s__SetOrClass )
| ~ ( s__subclass @ X0 @ X1 ) ),
inference(clc,[status(thm)],[zip_derived_cl29,zip_derived_cl27]) ).
thf(zip_derived_cl28,plain,
! [X0: $i,X1: $i] :
( ( s__instance @ X0 @ s__SetOrClass )
| ~ ( s__subclass @ X1 @ X0 ) ),
inference(cnf,[status(esa)],[kb_SUMO_26635]) ).
thf(zip_derived_cl1537,plain,
! [X0: $i,X1: $i,X2: $i] :
( ~ ( s__subclass @ X0 @ X1 )
| ( s__instance @ X2 @ X1 )
| ~ ( s__instance @ X2 @ X0 ) ),
inference(clc,[status(thm)],[zip_derived_cl1536,zip_derived_cl28]) ).
thf(zip_derived_cl1852,plain,
! [X0: $i] :
( ~ ( s__instance @ X0 @ sk__8 )
| ( s__instance @ X0 @ sk__9 ) ),
inference('sup-',[status(thm)],[zip_derived_cl948,zip_derived_cl1537]) ).
thf(zip_derived_cl336,plain,
( ( s__subclass @ sk__9 @ sk__10 )
| ~ ( s__subclass @ s__Reptile @ s__Animal ) ),
inference(cnf,[status(esa)],[local_2]) ).
thf(zip_derived_cl274_001,plain,
s__subclass @ s__Reptile @ s__Animal,
inference(cnf,[status(esa)],[kb_SUMO_59871]) ).
thf(zip_derived_cl947,plain,
s__subclass @ sk__9 @ sk__10,
inference(demod,[status(thm)],[zip_derived_cl336,zip_derived_cl274]) ).
thf(zip_derived_cl1537_002,plain,
! [X0: $i,X1: $i,X2: $i] :
( ~ ( s__subclass @ X0 @ X1 )
| ( s__instance @ X2 @ X1 )
| ~ ( s__instance @ X2 @ X0 ) ),
inference(clc,[status(thm)],[zip_derived_cl1536,zip_derived_cl28]) ).
thf(zip_derived_cl1854,plain,
! [X0: $i] :
( ~ ( s__instance @ X0 @ sk__9 )
| ( s__instance @ X0 @ sk__10 ) ),
inference('sup-',[status(thm)],[zip_derived_cl947,zip_derived_cl1537]) ).
thf(zip_derived_cl335,plain,
( ( s__subclass @ sk__10 @ sk__11 )
| ~ ( s__subclass @ s__Reptile @ s__Animal ) ),
inference(cnf,[status(esa)],[local_2]) ).
thf(zip_derived_cl274_003,plain,
s__subclass @ s__Reptile @ s__Animal,
inference(cnf,[status(esa)],[kb_SUMO_59871]) ).
thf(zip_derived_cl946,plain,
s__subclass @ sk__10 @ sk__11,
inference(demod,[status(thm)],[zip_derived_cl335,zip_derived_cl274]) ).
thf(zip_derived_cl1537_004,plain,
! [X0: $i,X1: $i,X2: $i] :
( ~ ( s__subclass @ X0 @ X1 )
| ( s__instance @ X2 @ X1 )
| ~ ( s__instance @ X2 @ X0 ) ),
inference(clc,[status(thm)],[zip_derived_cl1536,zip_derived_cl28]) ).
thf(zip_derived_cl1856,plain,
! [X0: $i] :
( ~ ( s__instance @ X0 @ sk__10 )
| ( s__instance @ X0 @ sk__11 ) ),
inference('sup-',[status(thm)],[zip_derived_cl946,zip_derived_cl1537]) ).
thf(zip_derived_cl334,plain,
( ( s__subclass @ sk__11 @ sk__12 )
| ~ ( s__subclass @ s__Reptile @ s__Animal ) ),
inference(cnf,[status(esa)],[local_2]) ).
thf(zip_derived_cl274_005,plain,
s__subclass @ s__Reptile @ s__Animal,
inference(cnf,[status(esa)],[kb_SUMO_59871]) ).
thf(zip_derived_cl945,plain,
s__subclass @ sk__11 @ sk__12,
inference(demod,[status(thm)],[zip_derived_cl334,zip_derived_cl274]) ).
thf(zip_derived_cl1537_006,plain,
! [X0: $i,X1: $i,X2: $i] :
( ~ ( s__subclass @ X0 @ X1 )
| ( s__instance @ X2 @ X1 )
| ~ ( s__instance @ X2 @ X0 ) ),
inference(clc,[status(thm)],[zip_derived_cl1536,zip_derived_cl28]) ).
thf(zip_derived_cl1858,plain,
! [X0: $i] :
( ~ ( s__instance @ X0 @ sk__11 )
| ( s__instance @ X0 @ sk__12 ) ),
inference('sup-',[status(thm)],[zip_derived_cl945,zip_derived_cl1537]) ).
thf(zip_derived_cl333,plain,
( ( s__subclass @ sk__12 @ sk__13 )
| ~ ( s__subclass @ s__Reptile @ s__Animal ) ),
inference(cnf,[status(esa)],[local_2]) ).
thf(zip_derived_cl274_007,plain,
s__subclass @ s__Reptile @ s__Animal,
inference(cnf,[status(esa)],[kb_SUMO_59871]) ).
thf(zip_derived_cl944,plain,
s__subclass @ sk__12 @ sk__13,
inference(demod,[status(thm)],[zip_derived_cl333,zip_derived_cl274]) ).
thf(zip_derived_cl1537_008,plain,
! [X0: $i,X1: $i,X2: $i] :
( ~ ( s__subclass @ X0 @ X1 )
| ( s__instance @ X2 @ X1 )
| ~ ( s__instance @ X2 @ X0 ) ),
inference(clc,[status(thm)],[zip_derived_cl1536,zip_derived_cl28]) ).
thf(zip_derived_cl1860,plain,
! [X0: $i] :
( ~ ( s__instance @ X0 @ sk__12 )
| ( s__instance @ X0 @ sk__13 ) ),
inference('sup-',[status(thm)],[zip_derived_cl944,zip_derived_cl1537]) ).
thf(zip_derived_cl332,plain,
( ( s__subclass @ sk__13 @ sk__14 )
| ~ ( s__subclass @ s__Reptile @ s__Animal ) ),
inference(cnf,[status(esa)],[local_2]) ).
thf(zip_derived_cl274_009,plain,
s__subclass @ s__Reptile @ s__Animal,
inference(cnf,[status(esa)],[kb_SUMO_59871]) ).
thf(zip_derived_cl943,plain,
s__subclass @ sk__13 @ sk__14,
inference(demod,[status(thm)],[zip_derived_cl332,zip_derived_cl274]) ).
thf(zip_derived_cl1537_010,plain,
! [X0: $i,X1: $i,X2: $i] :
( ~ ( s__subclass @ X0 @ X1 )
| ( s__instance @ X2 @ X1 )
| ~ ( s__instance @ X2 @ X0 ) ),
inference(clc,[status(thm)],[zip_derived_cl1536,zip_derived_cl28]) ).
thf(zip_derived_cl1862,plain,
! [X0: $i] :
( ~ ( s__instance @ X0 @ sk__13 )
| ( s__instance @ X0 @ sk__14 ) ),
inference('sup-',[status(thm)],[zip_derived_cl943,zip_derived_cl1537]) ).
thf(zip_derived_cl331,plain,
( ( s__subclass @ sk__14 @ sk__15 )
| ~ ( s__subclass @ s__Reptile @ s__Animal ) ),
inference(cnf,[status(esa)],[local_2]) ).
thf(zip_derived_cl274_011,plain,
s__subclass @ s__Reptile @ s__Animal,
inference(cnf,[status(esa)],[kb_SUMO_59871]) ).
thf(zip_derived_cl942,plain,
s__subclass @ sk__14 @ sk__15,
inference(demod,[status(thm)],[zip_derived_cl331,zip_derived_cl274]) ).
thf(zip_derived_cl1537_012,plain,
! [X0: $i,X1: $i,X2: $i] :
( ~ ( s__subclass @ X0 @ X1 )
| ( s__instance @ X2 @ X1 )
| ~ ( s__instance @ X2 @ X0 ) ),
inference(clc,[status(thm)],[zip_derived_cl1536,zip_derived_cl28]) ).
thf(zip_derived_cl1864,plain,
! [X0: $i] :
( ~ ( s__instance @ X0 @ sk__14 )
| ( s__instance @ X0 @ sk__15 ) ),
inference('sup-',[status(thm)],[zip_derived_cl942,zip_derived_cl1537]) ).
thf(zip_derived_cl330,plain,
( ( s__subclass @ sk__15 @ sk__16 )
| ~ ( s__subclass @ s__Reptile @ s__Animal ) ),
inference(cnf,[status(esa)],[local_2]) ).
thf(zip_derived_cl274_013,plain,
s__subclass @ s__Reptile @ s__Animal,
inference(cnf,[status(esa)],[kb_SUMO_59871]) ).
thf(zip_derived_cl941,plain,
s__subclass @ sk__15 @ sk__16,
inference(demod,[status(thm)],[zip_derived_cl330,zip_derived_cl274]) ).
thf(zip_derived_cl1537_014,plain,
! [X0: $i,X1: $i,X2: $i] :
( ~ ( s__subclass @ X0 @ X1 )
| ( s__instance @ X2 @ X1 )
| ~ ( s__instance @ X2 @ X0 ) ),
inference(clc,[status(thm)],[zip_derived_cl1536,zip_derived_cl28]) ).
thf(zip_derived_cl1866,plain,
! [X0: $i] :
( ~ ( s__instance @ X0 @ sk__15 )
| ( s__instance @ X0 @ sk__16 ) ),
inference('sup-',[status(thm)],[zip_derived_cl941,zip_derived_cl1537]) ).
thf(zip_derived_cl348,plain,
( ( s__subclass @ sk__16 @ sk__17 )
| ~ ( s__subclass @ s__Reptile @ s__Animal ) ),
inference(cnf,[status(esa)],[local_2]) ).
thf(zip_derived_cl274_015,plain,
s__subclass @ s__Reptile @ s__Animal,
inference(cnf,[status(esa)],[kb_SUMO_59871]) ).
thf(zip_derived_cl959,plain,
s__subclass @ sk__16 @ sk__17,
inference(demod,[status(thm)],[zip_derived_cl348,zip_derived_cl274]) ).
thf(zip_derived_cl1537_016,plain,
! [X0: $i,X1: $i,X2: $i] :
( ~ ( s__subclass @ X0 @ X1 )
| ( s__instance @ X2 @ X1 )
| ~ ( s__instance @ X2 @ X0 ) ),
inference(clc,[status(thm)],[zip_derived_cl1536,zip_derived_cl28]) ).
thf(zip_derived_cl1868,plain,
! [X0: $i] :
( ~ ( s__instance @ X0 @ sk__16 )
| ( s__instance @ X0 @ sk__17 ) ),
inference('sup-',[status(thm)],[zip_derived_cl959,zip_derived_cl1537]) ).
thf(zip_derived_cl349,plain,
( ( s__subclass @ sk__17 @ s__Reptile )
| ~ ( s__subclass @ s__Reptile @ s__Animal ) ),
inference(cnf,[status(esa)],[local_2]) ).
thf(zip_derived_cl274_017,plain,
s__subclass @ s__Reptile @ s__Animal,
inference(cnf,[status(esa)],[kb_SUMO_59871]) ).
thf(zip_derived_cl960,plain,
s__subclass @ sk__17 @ s__Reptile,
inference(demod,[status(thm)],[zip_derived_cl349,zip_derived_cl274]) ).
thf(zip_derived_cl1537_018,plain,
! [X0: $i,X1: $i,X2: $i] :
( ~ ( s__subclass @ X0 @ X1 )
| ( s__instance @ X2 @ X1 )
| ~ ( s__instance @ X2 @ X0 ) ),
inference(clc,[status(thm)],[zip_derived_cl1536,zip_derived_cl28]) ).
thf(zip_derived_cl1869,plain,
! [X0: $i] :
( ~ ( s__instance @ X0 @ sk__17 )
| ( s__instance @ X0 @ s__Reptile ) ),
inference('sup-',[status(thm)],[zip_derived_cl960,zip_derived_cl1537]) ).
thf(prove_from_SUMO_MILO,conjecture,
s__instance @ s__Creature50_1 @ s__Reptile ).
thf(zf_stmt_0,negated_conjecture,
~ ( s__instance @ s__Creature50_1 @ s__Reptile ),
inference('cnf.neg',[status(esa)],[prove_from_SUMO_MILO]) ).
thf(zip_derived_cl350,plain,
~ ( s__instance @ s__Creature50_1 @ s__Reptile ),
inference(cnf,[status(esa)],[zf_stmt_0]) ).
thf(zip_derived_cl2261,plain,
~ ( s__instance @ s__Creature50_1 @ sk__17 ),
inference('sup-',[status(thm)],[zip_derived_cl1869,zip_derived_cl350]) ).
thf(zip_derived_cl2262,plain,
~ ( s__instance @ s__Creature50_1 @ sk__16 ),
inference('sup-',[status(thm)],[zip_derived_cl1868,zip_derived_cl2261]) ).
thf(zip_derived_cl2263,plain,
~ ( s__instance @ s__Creature50_1 @ sk__15 ),
inference('sup-',[status(thm)],[zip_derived_cl1866,zip_derived_cl2262]) ).
thf(zip_derived_cl2264,plain,
~ ( s__instance @ s__Creature50_1 @ sk__14 ),
inference('sup-',[status(thm)],[zip_derived_cl1864,zip_derived_cl2263]) ).
thf(zip_derived_cl2265,plain,
~ ( s__instance @ s__Creature50_1 @ sk__13 ),
inference('sup-',[status(thm)],[zip_derived_cl1862,zip_derived_cl2264]) ).
thf(zip_derived_cl2266,plain,
~ ( s__instance @ s__Creature50_1 @ sk__12 ),
inference('sup-',[status(thm)],[zip_derived_cl1860,zip_derived_cl2265]) ).
thf(zip_derived_cl2267,plain,
~ ( s__instance @ s__Creature50_1 @ sk__11 ),
inference('sup-',[status(thm)],[zip_derived_cl1858,zip_derived_cl2266]) ).
thf(zip_derived_cl2268,plain,
~ ( s__instance @ s__Creature50_1 @ sk__10 ),
inference('sup-',[status(thm)],[zip_derived_cl1856,zip_derived_cl2267]) ).
thf(zip_derived_cl2269,plain,
~ ( s__instance @ s__Creature50_1 @ sk__9 ),
inference('sup-',[status(thm)],[zip_derived_cl1854,zip_derived_cl2268]) ).
thf(zip_derived_cl2270,plain,
~ ( s__instance @ s__Creature50_1 @ sk__8 ),
inference('sup-',[status(thm)],[zip_derived_cl1852,zip_derived_cl2269]) ).
thf(zip_derived_cl329,plain,
( ( s__instance @ s__Creature50_1 @ sk__8 )
| ~ ( s__subclass @ s__Reptile @ s__Animal ) ),
inference(cnf,[status(esa)],[local_2]) ).
thf(zip_derived_cl274_019,plain,
s__subclass @ s__Reptile @ s__Animal,
inference(cnf,[status(esa)],[kb_SUMO_59871]) ).
thf(zip_derived_cl940,plain,
s__instance @ s__Creature50_1 @ sk__8,
inference(demod,[status(thm)],[zip_derived_cl329,zip_derived_cl274]) ).
thf(zip_derived_cl2271,plain,
$false,
inference(demod,[status(thm)],[zip_derived_cl2270,zip_derived_cl940]) ).
%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.08/0.16 % Problem : CSR109+3 : TPTP v9.2.0. Bugfixed v7.3.0.
% 0.08/0.17 % Command : python3 /export/starexec/sandbox2/solver/bin/portfolio.lams.parallel.py %s %d /export/starexec/sandbox2/tmp/tmp.tKTcXyNUTQ true
% 0.15/0.42 % Computer : n022.cluster.edu
% 0.15/0.42 % Model : x86_64 x86_64
% 0.15/0.42 % CPU : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz
% 0.15/0.42 % Memory : 8042.1875MB
% 0.15/0.42 % OS : Linux 3.10.0-693.el7.x86_64
% 0.15/0.42 % CPULimit : 300
% 0.15/0.42 % WCLimit : 300
% 0.15/0.42 % DateTime : Wed Oct 1 14:47:53 EDT 2025
% 0.15/0.42 % CPUTime :
% 0.15/0.42 % Running portfolio for 300 s
% 0.15/0.42 % File : /export/starexec/sandbox2/benchmark/theBenchmark.p
% 0.15/0.42 % Number of cores: 8
% 0.15/0.42 % Python version: Python 3.6.8
% 0.15/0.42 % Running in FO mode
% 0.47/0.63 % Total configuration time : 435
% 0.47/0.63 % Estimated wc time : 1092
% 0.47/0.63 % Estimated cpu time (7 cpus) : 156.0
% 0.47/0.72 % /export/starexec/sandbox2/solver/bin/fo/fo6_bce.sh running for 75s
% 0.47/0.73 % /export/starexec/sandbox2/solver/bin/fo/fo3_bce.sh running for 75s
% 0.47/0.74 % /export/starexec/sandbox2/solver/bin/fo/fo1_av.sh running for 75s
% 0.47/0.74 % /export/starexec/sandbox2/solver/bin/fo/fo7.sh running for 63s
% 0.47/0.75 % /export/starexec/sandbox2/solver/bin/fo/fo13.sh running for 50s
% 0.47/0.75 % /export/starexec/sandbox2/solver/bin/fo/fo5.sh running for 50s
% 0.47/0.76 % /export/starexec/sandbox2/solver/bin/fo/fo4.sh running for 50s
% 25.48/4.27 % /export/starexec/sandbox2/solver/bin/fo/fo1_lcnf.sh running for 50s
% 27.80/4.58 % Solved by fo/fo7.sh.
% 27.80/4.58 % done 1580 iterations in 3.812s
% 27.80/4.58 % SZS status Theorem for '/export/starexec/sandbox2/benchmark/theBenchmark.p'
% 27.80/4.58 % SZS output start Refutation
% See solution above
% 27.80/4.59
% 27.80/4.59
% 27.80/4.59 % Terminating...
% 27.80/4.66 % Runner terminated.
% 27.80/4.67 % Zipperpin 1.5 exiting
%------------------------------------------------------------------------------