%------------------------------------------------------------------------------
% File : Drodi---4.1.1
% Problem : SET574+3 : TPTP v9.3.1. Released v2.2.0.
% Transfm : none
% Format : tptp:raw
% Command : drodi -timeout(300) /export/starexec/sandbox/benchmark/theBenchmark.p
% Computer : n001.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 02:10:06 PM UTC 2026
% Result : Theorem 0.22s 0.62s
% Output : CNFRefutation 0.22s
% Verified :
% SZS Type : Refutation
% Derivation depth : 8
% Number of leaves : 2
% Syntax : Number of formulae : 16 ( 5 unt; 0 def)
% Number of atoms : 46 ( 0 equ)
% Maximal formula atoms : 6 ( 2 avg)
% Number of connectives : 47 ( 17 ~; 12 |; 15 &)
% ( 1 <=>; 2 =>; 0 <=; 0 <~>)
% Maximal formula depth : 8 ( 5 avg)
% Maximal term depth : 2 ( 1 avg)
% Number of predicates : 3 ( 2 usr; 1 prp; 0-2 aty)
% Number of functors : 4 ( 4 usr; 3 con; 0-2 aty)
% Number of variables : 34 ( 25 !; 9 ?)
% Comments :
%------------------------------------------------------------------------------
fof(f1,axiom,
! [B,C] :
( intersect(B,C)
<=> ? [D] :
( member(D,C)
& member(D,B) ) ),
file('/export/starexec/sandbox/benchmark/theBenchmark.p') ).
fof(f3,conjecture,
! [B,C,D] :
( ( member(B,D)
& member(B,C) )
=> intersect(C,D) ),
file('/export/starexec/sandbox/benchmark/theBenchmark.p') ).
fof(f4,negated_conjecture,
~ ! [B,C,D] :
( ( member(B,D)
& member(B,C) )
=> intersect(C,D) ),
inference(negated_conjecture,[status(cth)],[f3]) ).
fof(f5,plain,
! [B,C] :
( ( ! [D] :
( ~ member(D,C)
| ~ member(D,B) )
| intersect(B,C) )
& ( ? [D] :
( member(D,C)
& member(D,B) )
| ~ intersect(B,C) ) ),
inference(NNF_transformation,[status(thm)],[f1]) ).
fof(f6,plain,
( ! [B,C] :
( ! [D] :
( ~ member(D,C)
| ~ member(D,B) )
| intersect(B,C) )
& ! [B,C] :
( ? [D] :
( member(D,C)
& member(D,B) )
| ~ intersect(B,C) ) ),
inference(miniscoping,[status(thm)],[f5]) ).
fof(f7,plain,
( ! [B,C] :
( ! [D] :
( ~ member(D,C)
| ~ member(D,B) )
| intersect(B,C) )
& ! [B,C] :
( ( member(sK0_skl(C,B),C)
& member(sK0_skl(C,B),B) )
| ~ intersect(B,C) ) ),
inference(skolemize,[status(esa),new_symbols(skolem,[sK0_skl]),skolemize(D,sK0_skl(C,B))],[f6]) ).
fof(f10,plain,
! [X0,X1,X2] :
( ~ member(X2,X1)
| ~ member(X2,X0)
| intersect(X0,X1) ),
inference(cnf_transformation,[status(thm)],[f7]) ).
fof(f13,plain,
? [B,C,D] :
( ~ intersect(C,D)
& member(B,D)
& member(B,C) ),
inference(pre_NNF_transformation,[status(thm)],[f4]) ).
fof(f14,plain,
? [C,D] :
( ~ intersect(C,D)
& ? [B] :
( member(B,D)
& member(B,C) ) ),
inference(miniscoping,[status(thm)],[f13]) ).
fof(f15,plain,
( ~ intersect(sK1_skl,sK2_skl)
& member(sK3_skl,sK2_skl)
& member(sK3_skl,sK1_skl) ),
inference(skolemize,[status(esa),new_symbols(skolem,[sK1_skl,sK2_skl,sK3_skl]),skolemize(C,sK1_skl),skolemize(D,sK2_skl),skolemize(B,sK3_skl)],[f14]) ).
fof(f16,plain,
member(sK3_skl,sK1_skl),
inference(cnf_transformation,[status(thm)],[f15]) ).
fof(f17,plain,
member(sK3_skl,sK2_skl),
inference(cnf_transformation,[status(thm)],[f15]) ).
fof(f18,plain,
~ intersect(sK1_skl,sK2_skl),
inference(cnf_transformation,[status(thm)],[f15]) ).
fof(f22,plain,
! [X0] :
( ~ member(sK3_skl,X0)
| intersect(sK1_skl,X0) ),
inference(resolution,[status(thm)],[f10,f16]) ).
fof(f28,plain,
intersect(sK1_skl,sK2_skl),
inference(resolution,[status(thm)],[f22,f17]) ).
fof(f30,plain,
$false,
inference(forward_subsumption_resolution,[status(thm)],[f28,f18]) ).
%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.00/0.05 % Problem : SET574+3 : TPTP v9.3.1. Released v2.2.0.
% 0.00/0.06 % Command : drodi -timeout(300) /export/starexec/sandbox/benchmark/theBenchmark.p
% 0.17/0.58 % Computer : n001.cluster.edu
% 0.17/0.58 % Model : x86_64 x86_64
% 0.17/0.58 % CPU : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz
% 0.17/0.58 % Memory : 8046.5625MB
% 0.17/0.58 % OS : Linux 6.8.0-71-generic
% 0.17/0.58 % CPULimit : 300
% 0.17/0.58 % WCLimit : 300
% 0.17/0.58 % DateTime : Mon Sep 21 05:31:59 UTC 2026
% 0.17/0.59 % CPUTime :
% 0.17/0.60 % Drodi V4.1.1
% 0.22/0.62 % Refutation found
% 0.22/0.62 % SZS status Theorem for theBenchmark: Theorem is valid
% 0.22/0.62 % SZS output start CNFRefutation for theBenchmark
% See solution above
% 0.22/0.65 % Elapsed time: 0.054792 seconds
% 0.22/0.65 % CPU time: 0.144089 seconds
% 0.22/0.65 % Total memory used: 36.322 MB
% 0.22/0.65 % Net memory used: 35.962 MB
%------------------------------------------------------------------------------