%------------------------------------------------------------------------------
% File : Drodi-SAT---4.1.1
% Problem : PUZ020-1 : TPTP v9.3.1. Released v1.0.0.
% Transfm : none
% Format : tptp:raw
% Command : drodi -satmode(on) -timeout(300) /export/starexec/sandbox2/benchmark/theBenchmark.p
% Computer : n017.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 02:00:16 PM UTC 2026
% Result : Unsatisfiable 0.09s 0.39s
% Output : Assurance 0s
% Verified :
% SZS Type : -
% Comments :
%------------------------------------------------------------------------------
%----No solution output by system
%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.00/0.02 % Problem : PUZ020-1 : TPTP v9.3.1. Released v1.0.0.
% 0.00/0.04 % Command : drodi -satmode(on) -timeout(300) /export/starexec/sandbox2/benchmark/theBenchmark.p
% 0.09/0.36 % Computer : n017.cluster.edu
% 0.09/0.36 % Model : x86_64 x86_64
% 0.09/0.36 % CPU : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz
% 0.09/0.36 % Memory : 8046.5625MB
% 0.09/0.36 % OS : Linux 6.8.0-71-generic
% 0.09/0.36 % CPULimit : 300
% 0.09/0.36 % WCLimit : 300
% 0.09/0.36 % DateTime : Mon Sep 21 03:40:27 UTC 2026
% 0.09/0.36 % CPUTime :
% 0.09/0.37 % Drodi V4.1.1
% 0.09/0.39 % Refutation found
% 0.09/0.39 % SZS status Unsatisfiable for theBenchmark: Theory is unsatisfiable
% 0.09/0.39 % SZS output start CNFRefutation for theBenchmark
% 0.09/0.39 fof(f1,axiom,(
% 0.09/0.39 (![X]: (( ~ person(X)| knight(X)| knave(X) ) ))),
% 0.09/0.39 file('/export/starexec/sandbox2/benchmark/theBenchmark.p')).
% 0.09/0.39 fof(f10,axiom,(
% 0.09/0.39 (![X,Y]: (( ~ knave(X)| ~ says(X,Y)| ~ a_truth(Y) ) ))),
% 0.09/0.39 file('/export/starexec/sandbox2/benchmark/theBenchmark.p')).
% 0.09/0.39 fof(f11,hypothesis,(
% 0.09/0.39 person(husband) ),
% 0.09/0.39 file('/export/starexec/sandbox2/benchmark/theBenchmark.p')).
% 0.09/0.39 fof(f14,hypothesis,(
% 0.09/0.39 says(husband,statement_by(husband)) ),
% 0.09/0.39 file('/export/starexec/sandbox2/benchmark/theBenchmark.p')).
% 0.09/0.39 fof(f17,hypothesis,(
% 0.09/0.39 ( a_truth(statement_by(husband))| knight(wife) ) ),
% 0.09/0.39 file('/export/starexec/sandbox2/benchmark/theBenchmark.p')).
% 0.09/0.39 fof(f18,hypothesis,(
% 0.09/0.39 ( ~ knight(wife)| a_truth(statement_by(husband)) ) ),
% 0.09/0.39 file('/export/starexec/sandbox2/benchmark/theBenchmark.p')).
% 0.09/0.39 fof(f19,negated_conjecture,(
% 0.09/0.39 ~ knight(husband) ),
% 0.09/0.39 file('/export/starexec/sandbox2/benchmark/theBenchmark.p')).
% 0.09/0.39 fof(f20,plain,(
% 0.09/0.39 ![X0]: (~person(X0)|knight(X0)|knave(X0))),
% 0.09/0.39 inference(cnf_transformation,[status(thm)],[f1])).
% 0.09/0.39 fof(f32,plain,(
% 0.09/0.39 ![Y]: ((![X]: (~knave(X)|~says(X,Y)))|~a_truth(Y))),
% 0.09/0.39 inference(miniscoping,[status(thm)],[f10])).
% 0.09/0.39 fof(f33,plain,(
% 0.09/0.39 ![X0,X1]: (~knave(X0)|~says(X0,X1)|~a_truth(X1))),
% 0.09/0.39 inference(cnf_transformation,[status(thm)],[f32])).
% 0.09/0.39 fof(f34,plain,(
% 0.09/0.39 person(husband)),
% 0.09/0.39 inference(cnf_transformation,[status(thm)],[f11])).
% 0.09/0.39 fof(f37,plain,(
% 0.09/0.39 says(husband,statement_by(husband))),
% 0.09/0.39 inference(cnf_transformation,[status(thm)],[f14])).
% 0.09/0.39 fof(f40,plain,(
% 0.09/0.39 a_truth(statement_by(husband))|knight(wife)),
% 0.09/0.39 inference(cnf_transformation,[status(thm)],[f17])).
% 0.09/0.39 fof(f41,plain,(
% 0.09/0.39 ~knight(wife)|a_truth(statement_by(husband))),
% 0.09/0.39 inference(cnf_transformation,[status(thm)],[f18])).
% 0.09/0.39 fof(f42,plain,(
% 0.09/0.39 ~knight(husband)),
% 0.09/0.39 inference(cnf_transformation,[status(thm)],[f19])).
% 0.09/0.39 fof(f45,plain,(
% 0.09/0.39 knight(husband)|knave(husband)),
% 0.09/0.39 inference(resolution,[status(thm)],[f34,f20])).
% 0.09/0.39 fof(f46,plain,(
% 0.09/0.39 knave(husband)),
% 0.09/0.39 inference(forward_subsumption_resolution,[status(thm)],[f45,f42])).
% 0.09/0.39 fof(f53,plain,(
% 0.09/0.39 ~knave(husband)|~a_truth(statement_by(husband))),
% 0.09/0.39 inference(resolution,[status(thm)],[f33,f37])).
% 0.09/0.39 fof(f54,plain,(
% 0.09/0.39 ~a_truth(statement_by(husband))),
% 0.09/0.39 inference(forward_subsumption_resolution,[status(thm)],[f53,f46])).
% 0.09/0.39 fof(f57,plain,(
% 0.09/0.39 knight(wife)),
% 0.09/0.39 inference(backward_subsumption_resolution,[status(thm)],[f40,f54])).
% 0.09/0.39 fof(f61,plain,(
% 0.09/0.39 a_truth(statement_by(husband))),
% 0.09/0.39 inference(forward_subsumption_resolution,[status(thm)],[f41,f57])).
% 0.09/0.39 fof(f62,plain,(
% 0.09/0.39 $false),
% 0.09/0.39 inference(backward_subsumption_resolution,[status(thm)],[f54,f61])).
% 0.09/0.39 % SZS output end CNFRefutation for theBenchmark.p
% 0.09/0.41 % Elapsed time: 0.042964 seconds
% 0.09/0.41 % CPU time: 0.099286 seconds
% 0.09/0.41 % Total memory used: 29.990 MB
% 0.09/0.41 % Net memory used: 29.879 MB
%------------------------------------------------------------------------------