%------------------------------------------------------------------------------
% File : Drodi-SAT---4.1.1
% Problem : SET062+1 : TPTP v9.3.1. Bugfixed v5.4.0.
% Transfm : none
% Format : tptp:raw
% Command : drodi -satmode(on) -timeout(300) /export/starexec/sandbox2/benchmark/theBenchmark.p
% Computer : n012.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 : Thu Sep 24 02:11:23 PM UTC 2026
% Result : Theorem 0.08s 0.33s
% Output : Assurance 0s
% Verified :
% SZS Type : -
% Comments :
%------------------------------------------------------------------------------
%----No solution output by system
%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.00/0.01 % Problem : SET062+1 : TPTP v9.3.1. Bugfixed v5.4.0.
% 0.00/0.02 % Command : drodi -satmode(on) -timeout(300) /export/starexec/sandbox2/benchmark/theBenchmark.p
% 0.03/0.30 % Computer : n012.cluster.edu
% 0.03/0.30 % Model : x86_64 x86_64
% 0.03/0.30 % CPU : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz
% 0.03/0.30 % Memory : 8046.5625MB
% 0.03/0.30 % OS : Linux 6.8.0-71-generic
% 0.03/0.30 % CPULimit : 300
% 0.03/0.30 % WCLimit : 300
% 0.03/0.30 % DateTime : Mon Sep 21 04:48:23 UTC 2026
% 0.03/0.30 % CPUTime :
% 0.03/0.31 % Drodi V4.1.1
% 0.08/0.33 % Refutation found
% 0.08/0.33 % SZS status Theorem for theBenchmark: Theorem is valid
% 0.08/0.33 % SZS output start CNFRefutation for theBenchmark
% 0.08/0.33 fof(f1,axiom,(
% 0.08/0.33 (! [X,Y] :( subclass(X,Y)<=> (! [U] :( member(U,X)=> member(U,Y) ) )) )),
% 0.08/0.33 file('/export/starexec/sandbox2/benchmark/theBenchmark.p')).
% 0.08/0.33 fof(f16,axiom,(
% 0.08/0.33 (! [X] : ~ member(X,null_class) )),
% 0.08/0.33 file('/export/starexec/sandbox2/benchmark/theBenchmark.p')).
% 0.08/0.33 fof(f44,conjecture,(
% 0.08/0.33 (! [X] : subclass(null_class,X) )),
% 0.08/0.33 file('/export/starexec/sandbox2/benchmark/theBenchmark.p')).
% 0.08/0.33 fof(f45,negated_conjecture,(
% 0.08/0.33 ~((! [X] : subclass(null_class,X) ))),
% 0.08/0.33 inference(negated_conjecture,[status(cth)],[f44])).
% 0.08/0.33 fof(f46,plain,(
% 0.08/0.33 ![X,Y]: (subclass(X,Y)<=>(![U]: (~member(U,X)|member(U,Y))))),
% 0.08/0.33 inference(pre_NNF_transformation,[status(thm)],[f1])).
% 0.08/0.33 fof(f47,plain,(
% 0.08/0.33 ![X,Y]: ((~subclass(X,Y)|(![U]: (~member(U,X)|member(U,Y))))&(subclass(X,Y)|(?[U]: (member(U,X)&~member(U,Y)))))),
% 0.08/0.33 inference(NNF_transformation,[status(thm)],[f46])).
% 0.08/0.33 fof(f48,plain,(
% 0.08/0.33 (![X,Y]: (~subclass(X,Y)|(![U]: (~member(U,X)|member(U,Y)))))&(![X,Y]: (subclass(X,Y)|(?[U]: (member(U,X)&~member(U,Y)))))),
% 0.08/0.33 inference(miniscoping,[status(thm)],[f47])).
% 0.08/0.33 fof(f49,plain,(
% 0.08/0.33 (![X,Y]: (~subclass(X,Y)|(![U]: (~member(U,X)|member(U,Y)))))&(![X,Y]: (subclass(X,Y)|(member(sK0_skl(Y,X),X)&~member(sK0_skl(Y,X),Y))))),
% 0.08/0.33 inference(skolemize,[status(esa),new_symbols(skolem,[sK0_skl]),skolemize(U,sK0_skl(Y,X))],[f48])).
% 0.08/0.33 fof(f51,plain,(
% 0.08/0.33 ![X0,X1]: (subclass(X0,X1)|member(sK0_skl(X1,X0),X0))),
% 0.08/0.33 inference(cnf_transformation,[status(thm)],[f49])).
% 0.08/0.33 fof(f96,plain,(
% 0.08/0.33 ![X0]: (~member(X0,null_class))),
% 0.08/0.33 inference(cnf_transformation,[status(thm)],[f16])).
% 0.08/0.33 fof(f191,plain,(
% 0.08/0.33 (?[X]: ~subclass(null_class,X))),
% 0.08/0.33 inference(pre_NNF_transformation,[status(thm)],[f45])).
% 0.08/0.33 fof(f192,plain,(
% 0.08/0.33 ~subclass(null_class,sK7_skl)),
% 0.08/0.33 inference(skolemize,[status(esa),new_symbols(skolem,[sK7_skl]),skolemize(X,sK7_skl)],[f191])).
% 0.08/0.33 fof(f193,plain,(
% 0.08/0.33 ~subclass(null_class,sK7_skl)),
% 0.08/0.33 inference(cnf_transformation,[status(thm)],[f192])).
% 0.08/0.33 fof(f210,plain,(
% 0.08/0.33 ![X0]: (subclass(null_class,X0))),
% 0.08/0.33 inference(resolution,[status(thm)],[f51,f96])).
% 0.08/0.33 fof(f213,plain,(
% 0.08/0.33 $false),
% 0.08/0.33 inference(backward_subsumption_resolution,[status(thm)],[f193,f210])).
% 0.08/0.33 % SZS output end CNFRefutation for theBenchmark.p
% 0.08/0.35 % Elapsed time: 0.046353 seconds
% 0.08/0.35 % CPU time: 0.086295 seconds
% 0.08/0.35 % Total memory used: 104.442 MB
% 0.08/0.35 % Net memory used: 104.350 MB
%------------------------------------------------------------------------------