%------------------------------------------------------------------------------
% File : Drodi---4.1.1
% Problem : SET238-6 : TPTP v9.3.1. Bugfixed v2.1.0.
% Transfm : none
% Format : tptp:raw
% Command : drodi -timeout(300) /export/starexec/sandbox/benchmark/theBenchmark.p
% Computer : n016.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 02:09:42 PM UTC 2026
% Result : Unsatisfiable 0.17s 5.66s
% Output : CNFRefutation 0.17s
% Verified :
% SZS Type : Refutation
% Derivation depth : 7
% Number of leaves : 5
% Syntax : Number of formulae : 17 ( 9 unt; 0 def)
% Number of atoms : 25 ( 7 equ)
% Maximal formula atoms : 2 ( 1 avg)
% Number of connectives : 19 ( 11 ~; 8 |; 0 &)
% ( 0 <=>; 0 =>; 0 <=; 0 <~>)
% Maximal formula depth : 7 ( 4 avg)
% Maximal term depth : 3 ( 1 avg)
% Number of predicates : 3 ( 1 usr; 1 prp; 0-2 aty)
% Number of functors : 10 ( 10 usr; 4 con; 0-3 aty)
% Number of variables : 32 ( 32 !; 0 ?)
% Comments :
%------------------------------------------------------------------------------
fof(f17,axiom,
! [Z,X,Y] :
( ordered_pair(first(Z),second(Z)) = Z
| ~ member(Z,cross_product(X,Y)) ),
file('/export/starexec/sandbox/benchmark/theBenchmark.p') ).
fof(f21,axiom,
! [Z,X,Y] :
( member(Z,X)
| ~ member(Z,intersection(X,Y)) ),
file('/export/starexec/sandbox/benchmark/theBenchmark.p') ).
fof(f29,axiom,
! [X,Y,Xr] : intersection(cross_product(X,Y),Xr) = restrict(Xr,X,Y),
file('/export/starexec/sandbox/benchmark/theBenchmark.p') ).
fof(f113,negated_conjecture,
member(z,restrict(xr,x,y)),
file('/export/starexec/sandbox/benchmark/theBenchmark.p') ).
fof(f114,negated_conjecture,
~ member(ordered_pair(first(z),second(z)),restrict(xr,x,y)),
file('/export/starexec/sandbox/benchmark/theBenchmark.p') ).
fof(f137,plain,
! [Z] :
( ordered_pair(first(Z),second(Z)) = Z
| ! [X,Y] : ~ member(Z,cross_product(X,Y)) ),
inference(miniscoping,[status(thm)],[f17]) ).
fof(f138,plain,
! [X0,X1,X2] :
( ordered_pair(first(X0),second(X0)) = X0
| ~ member(X0,cross_product(X1,X2)) ),
inference(cnf_transformation,[status(thm)],[f137]) ).
fof(f142,plain,
! [Z,X] :
( member(Z,X)
| ! [Y] : ~ member(Z,intersection(X,Y)) ),
inference(miniscoping,[status(thm)],[f21]) ).
fof(f143,plain,
! [X0,X1,X2] :
( member(X0,X1)
| ~ member(X0,intersection(X1,X2)) ),
inference(cnf_transformation,[status(thm)],[f142]) ).
fof(f152,plain,
! [X0,X1,X2] : intersection(cross_product(X0,X1),X2) = restrict(X2,X0,X1),
inference(cnf_transformation,[status(thm)],[f29]) ).
fof(f246,plain,
member(z,restrict(xr,x,y)),
inference(cnf_transformation,[status(thm)],[f113]) ).
fof(f247,plain,
~ member(ordered_pair(first(z),second(z)),restrict(xr,x,y)),
inference(cnf_transformation,[status(thm)],[f114]) ).
fof(f410,plain,
! [X0,X1,X2,X3] :
( member(X0,cross_product(X2,X3))
| ~ member(X0,restrict(X1,X2,X3)) ),
inference(paramodulation,[status(thm)],[f152,f143]) ).
fof(f489,plain,
! [X0,X1,X2,X3] :
( ordered_pair(first(X0),second(X0)) = X0
| ~ member(X0,restrict(X1,X2,X3)) ),
inference(resolution,[status(thm)],[f410,f138]) ).
fof(f558,plain,
ordered_pair(first(z),second(z)) = z,
inference(resolution,[status(thm)],[f489,f246]) ).
fof(f566,plain,
~ member(z,restrict(xr,x,y)),
inference(backward_demodulation,[status(thm)],[f558,f247]) ).
fof(f579,plain,
$false,
inference(forward_subsumption_resolution,[status(thm)],[f566,f246]) ).
%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.00/0.03 % Problem : SET238-6 : TPTP v9.3.1. Bugfixed v2.1.0.
% 0.00/0.04 % Command : drodi -timeout(300) /export/starexec/sandbox/benchmark/theBenchmark.p
% 0.12/5.57 % Computer : n016.cluster.edu
% 0.12/5.57 % Model : x86_64 x86_64
% 0.12/5.57 % CPU : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz
% 0.12/5.57 % Memory : 8046.5625MB
% 0.12/5.57 % OS : Linux 6.8.0-71-generic
% 0.12/5.57 % CPULimit : 300
% 0.12/5.57 % WCLimit : 300
% 0.12/5.57 % DateTime : Mon Sep 21 05:07:30 UTC 2026
% 0.12/5.57 % CPUTime :
% 0.12/5.59 % Drodi V4.1.1
% 0.17/5.66 % Refutation found
% 0.17/5.66 % SZS status Unsatisfiable for theBenchmark: Theory is unsatisfiable
% 0.17/5.66 % SZS output start CNFRefutation for theBenchmark
% See solution above
% 0.17/5.69 % Elapsed time: 0.098442 seconds
% 0.17/5.69 % CPU time: 0.408530 seconds
% 0.17/5.69 % Total memory used: 110.255 MB
% 0.17/5.69 % Net memory used: 109.911 MB
%------------------------------------------------------------------------------