%------------------------------------------------------------------------------
% File : Z3---4.15.1
% Problem : KRS141+1 : TPTP v9.0.0. Released v3.1.0.
% Transfm : none
% Format : tptp
% Command : run_E %s %d THM
% Computer : n014.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 : Sat Jun 21 05:13:28 AM UTC 2025
% Result : Theorem 0.17s 0.35s
% Output : Assurance 0s
% Verified :
% SZS Type : -
% Comments :
%------------------------------------------------------------------------------
%----No solution output by system
%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.10/0.11 % Problem : KRS141+1 : TPTP v9.0.0. Released v3.1.0.
% 0.10/0.11 % Command : run_E %s %d THM
% 0.11/0.31 % Computer : n014.cluster.edu
% 0.11/0.31 % Model : x86_64 x86_64
% 0.11/0.31 % CPU : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz
% 0.11/0.31 % Memory : 8042.1875MB
% 0.11/0.31 % OS : Linux 3.10.0-693.el7.x86_64
% 0.11/0.31 % CPULimit : 300
% 0.11/0.31 % WCLimit : 300
% 0.11/0.31 % DateTime : Thu Jun 19 19:11:54 EDT 2025
% 0.11/0.32 % CPUTime :
% 0.17/0.35 % SZS status Theorem
% 0.17/0.35 % SZS output start Proof
% 0.17/0.35 tff(xsd_string_type, type, (
% 0.17/0.35 xsd_string: $i > $o)).
% 0.17/0.35 tff(tptp_fun_X_1_type, type, (
% 0.17/0.35 tptp_fun_X_1: $i)).
% 0.17/0.35 tff(xsd_integer_type, type, (
% 0.17/0.35 xsd_integer: $i > $o)).
% 0.17/0.35 tff(cowlThing_type, type, (
% 0.17/0.35 cowlThing: $i > $o)).
% 0.17/0.35 tff(tptp_fun_X_0_type, type, (
% 0.17/0.35 tptp_fun_X_0: $i)).
% 0.17/0.35 tff(cowlNothing_type, type, (
% 0.17/0.35 cowlNothing: $i > $o)).
% 0.17/0.35 tff(cc_type, type, (
% 0.17/0.35 cc: $i > $o)).
% 0.17/0.35 tff(io_type, type, (
% 0.17/0.35 io: $i)).
% 0.17/0.35 tff(rp_type, type, (
% 0.17/0.35 rp: ( $i * $i ) > $o)).
% 0.17/0.35 tff(ii_type, type, (
% 0.17/0.35 ii: $i)).
% 0.17/0.35 tff(cr_type, type, (
% 0.17/0.35 cr: $i > $o)).
% 0.17/0.35 tff(1,assumption,(cowlNothing(X!0) | (~cowlThing(X!0))), introduced(assumption)).
% 0.17/0.35 tff(2,plain,
% 0.17/0.35 (^[X: $i] : refl((~(cowlNothing(X) | (~cowlThing(X)))) <=> (~(cowlNothing(X) | (~cowlThing(X)))))),
% 0.17/0.35 inference(bind,[status(th)],[])).
% 0.17/0.35 tff(3,plain,
% 0.17/0.35 (![X: $i] : (~(cowlNothing(X) | (~cowlThing(X)))) <=> ![X: $i] : (~(cowlNothing(X) | (~cowlThing(X))))),
% 0.17/0.35 inference(quant_intro,[status(thm)],[2])).
% 0.17/0.35 tff(4,plain,
% 0.17/0.35 (^[X: $i] : rewrite((cowlThing(X) & (~cowlNothing(X))) <=> (~(cowlNothing(X) | (~cowlThing(X)))))),
% 0.17/0.35 inference(bind,[status(th)],[])).
% 0.17/0.35 tff(5,plain,
% 0.17/0.35 (![X: $i] : (cowlThing(X) & (~cowlNothing(X))) <=> ![X: $i] : (~(cowlNothing(X) | (~cowlThing(X))))),
% 0.17/0.35 inference(quant_intro,[status(thm)],[4])).
% 0.17/0.35 tff(6,plain,
% 0.17/0.35 (![X: $i] : (cowlThing(X) & (~cowlNothing(X))) <=> ![X: $i] : (cowlThing(X) & (~cowlNothing(X)))),
% 0.17/0.35 inference(rewrite,[status(thm)],[])).
% 0.17/0.35 tff(7,axiom,(![X: $i] : (cowlThing(X) & (~cowlNothing(X)))), file('/export/starexec/sandbox/benchmark/theBenchmark.p','axiom_0')).
% 0.17/0.35 tff(8,plain,
% 0.17/0.35 (![X: $i] : (cowlThing(X) & (~cowlNothing(X)))),
% 0.17/0.35 inference(modus_ponens,[status(thm)],[7, 6])).
% 0.17/0.35 tff(9,plain,(
% 0.17/0.35 ![X: $i] : (cowlThing(X) & (~cowlNothing(X)))),
% 0.17/0.35 inference(skolemize,[status(sab)],[8])).
% 0.17/0.35 tff(10,plain,
% 0.17/0.35 (![X: $i] : (~(cowlNothing(X) | (~cowlThing(X))))),
% 0.17/0.35 inference(modus_ponens,[status(thm)],[9, 5])).
% 0.17/0.35 tff(11,plain,
% 0.17/0.35 (![X: $i] : (~(cowlNothing(X) | (~cowlThing(X))))),
% 0.17/0.35 inference(modus_ponens,[status(thm)],[10, 3])).
% 0.17/0.35 tff(12,plain,
% 0.17/0.35 ((~![X: $i] : (~(cowlNothing(X) | (~cowlThing(X))))) | (~(cowlNothing(X!0) | (~cowlThing(X!0))))),
% 0.17/0.35 inference(quant_inst,[status(thm)],[])).
% 0.17/0.35 tff(13,plain,
% 0.17/0.35 ($false),
% 0.17/0.35 inference(unit_resolution,[status(thm)],[12, 11, 1])).
% 0.17/0.35 tff(14,plain,(~(cowlNothing(X!0) | (~cowlThing(X!0)))), inference(lemma,lemma(discharge,[]))).
% 0.17/0.35 tff(15,plain,
% 0.17/0.35 ((cowlNothing(X!0) | (~cowlThing(X!0))) | cowlThing(X!0)),
% 0.17/0.35 inference(tautology,[status(thm)],[])).
% 0.17/0.35 tff(16,plain,
% 0.17/0.35 (cowlThing(X!0)),
% 0.17/0.35 inference(unit_resolution,[status(thm)],[15, 14])).
% 0.17/0.35 tff(17,plain,
% 0.17/0.35 ((cowlNothing(X!0) | (~cowlThing(X!0))) | (~cowlNothing(X!0))),
% 0.17/0.35 inference(tautology,[status(thm)],[])).
% 0.17/0.35 tff(18,plain,
% 0.17/0.35 (~cowlNothing(X!0)),
% 0.17/0.35 inference(unit_resolution,[status(thm)],[17, 14])).
% 0.17/0.35 tff(19,plain,
% 0.17/0.35 (cr(ii) <=> cr(ii)),
% 0.17/0.35 inference(rewrite,[status(thm)],[])).
% 0.17/0.35 tff(20,axiom,(cr(ii)), file('/export/starexec/sandbox/benchmark/theBenchmark.p','axiom_3')).
% 0.17/0.35 tff(21,plain,
% 0.17/0.35 (cr(ii)),
% 0.17/0.35 inference(modus_ponens,[status(thm)],[20, 19])).
% 0.17/0.35 tff(22,plain,
% 0.17/0.35 (^[X: $i] : refl(((~cr(X)) | ![Y: $i] : (cc(Y) | (~rp(X, Y)))) <=> ((~cr(X)) | ![Y: $i] : (cc(Y) | (~rp(X, Y)))))),
% 0.17/0.35 inference(bind,[status(th)],[])).
% 0.17/0.35 tff(23,plain,
% 0.17/0.35 (![X: $i] : ((~cr(X)) | ![Y: $i] : (cc(Y) | (~rp(X, Y)))) <=> ![X: $i] : ((~cr(X)) | ![Y: $i] : (cc(Y) | (~rp(X, Y))))),
% 0.17/0.35 inference(quant_intro,[status(thm)],[22])).
% 0.17/0.35 tff(24,plain,
% 0.17/0.35 (^[X: $i] : rewrite(((~cr(X)) | ![Y: $i] : (cc(Y) | (~rp(X, Y)))) <=> ((~cr(X)) | ![Y: $i] : (cc(Y) | (~rp(X, Y)))))),
% 0.17/0.35 inference(bind,[status(th)],[])).
% 0.17/0.35 tff(25,plain,
% 0.17/0.35 (![X: $i] : ((~cr(X)) | ![Y: $i] : (cc(Y) | (~rp(X, Y)))) <=> ![X: $i] : ((~cr(X)) | ![Y: $i] : (cc(Y) | (~rp(X, Y))))),
% 0.17/0.35 inference(quant_intro,[status(thm)],[24])).
% 0.17/0.35 tff(26,plain,
% 0.17/0.35 (![X: $i] : ((~cr(X)) | ![Y: $i] : (cc(Y) | (~rp(X, Y)))) <=> ![X: $i] : ((~cr(X)) | ![Y: $i] : (cc(Y) | (~rp(X, Y))))),
% 0.17/0.35 inference(transitivity,[status(thm)],[25, 23])).
% 0.17/0.35 tff(27,plain,
% 0.17/0.35 (![X: $i] : ((~cr(X)) | ![Y: $i] : (cc(Y) | (~rp(X, Y)))) <=> ![X: $i] : ((~cr(X)) | ![Y: $i] : (cc(Y) | (~rp(X, Y))))),
% 0.17/0.35 inference(rewrite,[status(thm)],[])).
% 0.17/0.35 tff(28,plain,
% 0.17/0.35 (^[X: $i] : trans(monotonicity(quant_intro(proof_bind(^[Y: $i] : rewrite((rp(X, Y) => cc(Y)) <=> (cc(Y) | (~rp(X, Y))))), (![Y: $i] : (rp(X, Y) => cc(Y)) <=> ![Y: $i] : (cc(Y) | (~rp(X, Y))))), ((cr(X) => ![Y: $i] : (rp(X, Y) => cc(Y))) <=> (cr(X) => ![Y: $i] : (cc(Y) | (~rp(X, Y)))))), rewrite((cr(X) => ![Y: $i] : (cc(Y) | (~rp(X, Y)))) <=> ((~cr(X)) | ![Y: $i] : (cc(Y) | (~rp(X, Y))))), ((cr(X) => ![Y: $i] : (rp(X, Y) => cc(Y))) <=> ((~cr(X)) | ![Y: $i] : (cc(Y) | (~rp(X, Y))))))),
% 0.17/0.35 inference(bind,[status(th)],[])).
% 0.17/0.35 tff(29,plain,
% 0.17/0.35 (![X: $i] : (cr(X) => ![Y: $i] : (rp(X, Y) => cc(Y))) <=> ![X: $i] : ((~cr(X)) | ![Y: $i] : (cc(Y) | (~rp(X, Y))))),
% 0.17/0.35 inference(quant_intro,[status(thm)],[28])).
% 0.17/0.35 tff(30,axiom,(![X: $i] : (cr(X) => ![Y: $i] : (rp(X, Y) => cc(Y)))), file('/export/starexec/sandbox/benchmark/theBenchmark.p','axiom_2')).
% 0.17/0.35 tff(31,plain,
% 0.17/0.35 (![X: $i] : ((~cr(X)) | ![Y: $i] : (cc(Y) | (~rp(X, Y))))),
% 0.17/0.35 inference(modus_ponens,[status(thm)],[30, 29])).
% 0.17/0.35 tff(32,plain,
% 0.17/0.35 (![X: $i] : ((~cr(X)) | ![Y: $i] : (cc(Y) | (~rp(X, Y))))),
% 0.17/0.35 inference(modus_ponens,[status(thm)],[31, 27])).
% 0.17/0.35 tff(33,plain,(
% 0.17/0.35 ![X: $i] : ((~cr(X)) | ![Y: $i] : (cc(Y) | (~rp(X, Y))))),
% 0.17/0.35 inference(skolemize,[status(sab)],[32])).
% 0.17/0.35 tff(34,plain,
% 0.17/0.35 (![X: $i] : ((~cr(X)) | ![Y: $i] : (cc(Y) | (~rp(X, Y))))),
% 0.17/0.35 inference(modus_ponens,[status(thm)],[33, 26])).
% 0.17/0.35 tff(35,plain,
% 0.17/0.35 (((~![X: $i] : ((~cr(X)) | ![Y: $i] : (cc(Y) | (~rp(X, Y))))) | ((~cr(ii)) | ![Y: $i] : (cc(Y) | (~rp(ii, Y))))) <=> ((~![X: $i] : ((~cr(X)) | ![Y: $i] : (cc(Y) | (~rp(X, Y))))) | (~cr(ii)) | ![Y: $i] : (cc(Y) | (~rp(ii, Y))))),
% 0.17/0.35 inference(rewrite,[status(thm)],[])).
% 0.17/0.35 tff(36,plain,
% 0.17/0.35 ((~![X: $i] : ((~cr(X)) | ![Y: $i] : (cc(Y) | (~rp(X, Y))))) | ((~cr(ii)) | ![Y: $i] : (cc(Y) | (~rp(ii, Y))))),
% 0.17/0.35 inference(quant_inst,[status(thm)],[])).
% 0.17/0.35 tff(37,plain,
% 0.17/0.35 ((~![X: $i] : ((~cr(X)) | ![Y: $i] : (cc(Y) | (~rp(X, Y))))) | (~cr(ii)) | ![Y: $i] : (cc(Y) | (~rp(ii, Y)))),
% 0.17/0.35 inference(modus_ponens,[status(thm)],[36, 35])).
% 0.17/0.35 tff(38,plain,
% 0.17/0.35 (![Y: $i] : (cc(Y) | (~rp(ii, Y)))),
% 0.17/0.35 inference(unit_resolution,[status(thm)],[37, 34, 21])).
% 0.17/0.35 tff(39,plain,
% 0.17/0.35 (rp(ii, io) <=> rp(ii, io)),
% 0.17/0.35 inference(rewrite,[status(thm)],[])).
% 0.17/0.35 tff(40,axiom,(rp(ii, io)), file('/export/starexec/sandbox/benchmark/theBenchmark.p','axiom_5')).
% 0.17/0.35 tff(41,plain,
% 0.17/0.35 (rp(ii, io)),
% 0.17/0.35 inference(modus_ponens,[status(thm)],[40, 39])).
% 0.17/0.35 tff(42,plain,
% 0.17/0.35 (((~![Y: $i] : (cc(Y) | (~rp(ii, Y)))) | (cc(io) | (~rp(ii, io)))) <=> ((~![Y: $i] : (cc(Y) | (~rp(ii, Y)))) | cc(io) | (~rp(ii, io)))),
% 0.17/0.35 inference(rewrite,[status(thm)],[])).
% 0.17/0.35 tff(43,plain,
% 0.17/0.35 ((~![Y: $i] : (cc(Y) | (~rp(ii, Y)))) | (cc(io) | (~rp(ii, io)))),
% 0.17/0.35 inference(quant_inst,[status(thm)],[])).
% 0.17/0.35 tff(44,plain,
% 0.17/0.35 ((~![Y: $i] : (cc(Y) | (~rp(ii, Y)))) | cc(io) | (~rp(ii, io))),
% 0.17/0.35 inference(modus_ponens,[status(thm)],[43, 42])).
% 0.17/0.35 tff(45,plain,
% 0.17/0.35 (cc(io)),
% 0.17/0.35 inference(unit_resolution,[status(thm)],[44, 41, 38])).
% 0.17/0.35 tff(46,plain,
% 0.17/0.35 (cowlThing(io) <=> cowlThing(io)),
% 0.17/0.35 inference(rewrite,[status(thm)],[])).
% 0.17/0.35 tff(47,axiom,(cowlThing(io)), file('/export/starexec/sandbox/benchmark/theBenchmark.p','axiom_6')).
% 0.17/0.35 tff(48,plain,
% 0.17/0.35 (cowlThing(io)),
% 0.17/0.35 inference(modus_ponens,[status(thm)],[47, 46])).
% 0.17/0.35 tff(49,plain,
% 0.17/0.35 (((cowlNothing(X!0) | (~cowlThing(X!0))) | (xsd_integer(X!1) <=> xsd_string(X!1)) | (~cc(io)) | (~cowlThing(io))) <=> (cowlNothing(X!0) | (xsd_integer(X!1) <=> xsd_string(X!1)) | (~cc(io)) | (~cowlThing(io)) | (~cowlThing(X!0)))),
% 0.17/0.35 inference(rewrite,[status(thm)],[])).
% 0.17/0.35 tff(50,plain,
% 0.17/0.35 ((~(~(cowlNothing(X!0) | (~cowlThing(X!0))))) <=> (cowlNothing(X!0) | (~cowlThing(X!0)))),
% 0.17/0.35 inference(rewrite,[status(thm)],[])).
% 0.17/0.35 tff(51,plain,
% 0.17/0.35 ((cowlThing(X!0) & (~cowlNothing(X!0))) <=> (~(cowlNothing(X!0) | (~cowlThing(X!0))))),
% 0.17/0.35 inference(rewrite,[status(thm)],[])).
% 0.17/0.35 tff(52,plain,
% 0.17/0.35 ((~(cowlThing(X!0) & (~cowlNothing(X!0)))) <=> (~(~(cowlNothing(X!0) | (~cowlThing(X!0)))))),
% 0.17/0.35 inference(monotonicity,[status(thm)],[51])).
% 0.17/0.35 tff(53,plain,
% 0.17/0.36 ((~(cowlThing(X!0) & (~cowlNothing(X!0)))) <=> (cowlNothing(X!0) | (~cowlThing(X!0)))),
% 0.17/0.36 inference(transitivity,[status(thm)],[52, 50])).
% 0.17/0.36 tff(54,plain,
% 0.17/0.36 (((~(cowlThing(X!0) & (~cowlNothing(X!0)))) | (xsd_integer(X!1) <=> xsd_string(X!1)) | (~cc(io)) | (~cowlThing(io))) <=> ((cowlNothing(X!0) | (~cowlThing(X!0))) | (xsd_integer(X!1) <=> xsd_string(X!1)) | (~cc(io)) | (~cowlThing(io)))),
% 0.17/0.36 inference(monotonicity,[status(thm)],[53])).
% 0.17/0.36 tff(55,plain,
% 0.17/0.36 (((~(cowlThing(X!0) & (~cowlNothing(X!0)))) | (xsd_integer(X!1) <=> xsd_string(X!1)) | (~cc(io)) | (~cowlThing(io))) <=> (cowlNothing(X!0) | (xsd_integer(X!1) <=> xsd_string(X!1)) | (~cc(io)) | (~cowlThing(io)) | (~cowlThing(X!0)))),
% 0.17/0.36 inference(transitivity,[status(thm)],[54, 49])).
% 0.17/0.36 tff(56,plain,
% 0.17/0.36 (((~(cowlThing(X!0) & (~cowlNothing(X!0)))) | (xsd_integer(X!1) <=> xsd_string(X!1)) | (~cc(io)) | (~cowlThing(io))) <=> ((~(cowlThing(X!0) & (~cowlNothing(X!0)))) | (xsd_integer(X!1) <=> xsd_string(X!1)) | (~cc(io)) | (~cowlThing(io)))),
% 0.17/0.36 inference(rewrite,[status(thm)],[])).
% 0.17/0.36 tff(57,plain,
% 0.17/0.36 ((![X: $i] : (cowlThing(X) & (~cowlNothing(X))) & ![X: $i] : (~(xsd_integer(X) <=> xsd_string(X))) & cc(io) & cowlThing(io)) <=> (![X: $i] : (cowlThing(X) & (~cowlNothing(X))) & ![X: $i] : (~(xsd_integer(X) <=> xsd_string(X))) & cc(io) & cowlThing(io))),
% 0.17/0.36 inference(rewrite,[status(thm)],[])).
% 0.17/0.36 tff(58,plain,
% 0.17/0.36 ((~(![X: $i] : (cowlThing(X) & (~cowlNothing(X))) & ![X: $i] : (~(xsd_integer(X) <=> xsd_string(X))) & cc(io) & cowlThing(io))) <=> (~(![X: $i] : (cowlThing(X) & (~cowlNothing(X))) & ![X: $i] : (~(xsd_integer(X) <=> xsd_string(X))) & cc(io) & cowlThing(io)))),
% 0.17/0.36 inference(monotonicity,[status(thm)],[57])).
% 0.17/0.36 tff(59,plain,
% 0.17/0.36 ((~(![X: $i] : (cowlThing(X) & (~cowlNothing(X))) & ![X: $i] : (~(xsd_integer(X) <=> xsd_string(X))) & cc(io) & cowlThing(io))) <=> (~(![X: $i] : (cowlThing(X) & (~cowlNothing(X))) & ![X: $i] : (~(xsd_integer(X) <=> xsd_string(X))) & cc(io) & cowlThing(io)))),
% 0.17/0.36 inference(rewrite,[status(thm)],[])).
% 0.17/0.36 tff(60,plain,
% 0.17/0.36 ((~(((![X: $i] : (cowlThing(X) & (~cowlNothing(X))) & ![X: $i] : (xsd_string(X) <=> (~xsd_integer(X)))) & cc(io)) & cowlThing(io))) <=> (~(![X: $i] : (cowlThing(X) & (~cowlNothing(X))) & ![X: $i] : (~(xsd_integer(X) <=> xsd_string(X))) & cc(io) & cowlThing(io)))),
% 0.17/0.36 inference(rewrite,[status(thm)],[])).
% 0.17/0.36 tff(61,axiom,(~(((![X: $i] : (cowlThing(X) & (~cowlNothing(X))) & ![X: $i] : (xsd_string(X) <=> (~xsd_integer(X)))) & cc(io)) & cowlThing(io))), file('/export/starexec/sandbox/benchmark/theBenchmark.p','the_axiom')).
% 0.17/0.36 tff(62,plain,
% 0.17/0.36 (~(![X: $i] : (cowlThing(X) & (~cowlNothing(X))) & ![X: $i] : (~(xsd_integer(X) <=> xsd_string(X))) & cc(io) & cowlThing(io))),
% 0.17/0.36 inference(modus_ponens,[status(thm)],[61, 60])).
% 0.17/0.36 tff(63,plain,
% 0.17/0.36 (~(![X: $i] : (cowlThing(X) & (~cowlNothing(X))) & ![X: $i] : (~(xsd_integer(X) <=> xsd_string(X))) & cc(io) & cowlThing(io))),
% 0.17/0.36 inference(modus_ponens,[status(thm)],[62, 58])).
% 0.17/0.36 tff(64,plain,
% 0.17/0.36 (~(![X: $i] : (cowlThing(X) & (~cowlNothing(X))) & ![X: $i] : (~(xsd_integer(X) <=> xsd_string(X))) & cc(io) & cowlThing(io))),
% 0.17/0.36 inference(modus_ponens,[status(thm)],[63, 59])).
% 0.17/0.36 tff(65,plain,
% 0.17/0.36 (~(![X: $i] : (cowlThing(X) & (~cowlNothing(X))) & ![X: $i] : (~(xsd_integer(X) <=> xsd_string(X))) & cc(io) & cowlThing(io))),
% 0.17/0.36 inference(modus_ponens,[status(thm)],[64, 58])).
% 0.17/0.36 unexpected number of arguments: (let ((a!1 (forall ((X $i)) (and (cowlThing X) (not (cowlNothing X)))))
% 0.17/0.36 (a!2 (not (and (cowlThing X!0) (not (cowlNothing X!0)))))
% 0.17/0.36 (a!3 (forall ((X $i)) (not (= (xsd_integer X) (xsd_string X)))))
% 0.17/0.36 (a!5 (refl (~ (not (cc io)) (not (cc io)))))
% 0.17/0.36 (a!6 (refl (~ (not (cowlThing io)) (not (cowlThing io))))))
% 0.17/0.36 (let ((a!4 (sk (~ (not a!3) (= (xsd_integer X!1) (xsd_string X!1)))))
% 0.17/0.36 (a!7 (~ (not (and a!1 a!3 (cc io) (cowlThing io)))
% 0.17/0.36 (or a!2
% 0.17/0.36 (= (xsd_integer X!1) (xsd_string X!1))
% 0.17/0.36 (not (cc io))
% 0.17/0.36 (not (cowlThing io))))))
% 0.17/0.36 (nnf-neg (sk (~ (not a!1) a!2)) a!4 a!5 a!6 a!7)))
% 0.17/0.36 Proof display could not be completed: unexpected number of arguments
% 0.17/0.36 % E exiting
%------------------------------------------------------------------------------