%------------------------------------------------------------------------------
% File : Drodi---4.1.1
% Problem : PLA018-1 : TPTP v9.3.1. Released v1.1.0.
% Transfm : none
% Format : tptp:raw
% Command : drodi -timeout(300) /export/starexec/sandbox/benchmark/theBenchmark.p
% Computer : n002.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 01:58:33 PM UTC 2026
% Result : Unsatisfiable 0.23s 5.62s
% Output : CNFRefutation 0.23s
% Verified :
% SZS Type : Refutation
% Derivation depth : 41
% Number of leaves : 26
% Syntax : Number of formulae : 104 ( 35 unt; 0 def)
% Number of atoms : 314 ( 0 equ)
% Maximal formula atoms : 8 ( 3 avg)
% Number of connectives : 460 ( 250 ~; 210 |; 0 &)
% ( 0 <=>; 0 =>; 0 <=; 0 <~>)
% Maximal formula depth : 11 ( 5 avg)
% Maximal term depth : 3 ( 1 avg)
% Number of predicates : 3 ( 2 usr; 1 prp; 0-2 aty)
% Number of functors : 14 ( 14 usr; 7 con; 0-2 aty)
% Number of variables : 158 ( 158 !; 0 ?)
% Comments :
%------------------------------------------------------------------------------
fof(f1,axiom,
! [X,Y,State] :
( ~ holds(Y,State)
| ~ holds(X,State)
| holds(and(X,Y),State) ),
file('/export/starexec/sandbox/benchmark/theBenchmark.p') ).
fof(f2,axiom,
! [X,State] :
( ~ differ(X,table)
| ~ holds(clear(X),State)
| ~ holds(empty,State)
| holds(holding(X),do(pickup(X),State)) ),
file('/export/starexec/sandbox/benchmark/theBenchmark.p') ).
fof(f3,axiom,
! [Y,X,State] :
( ~ holds(empty,State)
| ~ holds(clear(X),State)
| ~ holds(on(X,Y),State)
| holds(clear(Y),do(pickup(X),State)) ),
file('/export/starexec/sandbox/benchmark/theBenchmark.p') ).
fof(f4,axiom,
! [X,Y,Z,State] :
( ~ differ(X,Z)
| ~ holds(on(X,Y),State)
| holds(on(X,Y),do(pickup(Z),State)) ),
file('/export/starexec/sandbox/benchmark/theBenchmark.p') ).
fof(f5,axiom,
! [X,Z,State] :
( ~ differ(X,Z)
| ~ holds(clear(X),State)
| holds(clear(X),do(pickup(Z),State)) ),
file('/export/starexec/sandbox/benchmark/theBenchmark.p') ).
fof(f6,axiom,
! [X,Y,State] :
( ~ holds(clear(Y),State)
| ~ holds(holding(X),State)
| holds(empty,do(putdown(X,Y),State)) ),
file('/export/starexec/sandbox/benchmark/theBenchmark.p') ).
fof(f7,axiom,
! [X,Y,State] :
( ~ holds(clear(Y),State)
| ~ holds(holding(X),State)
| holds(on(X,Y),do(putdown(X,Y),State)) ),
file('/export/starexec/sandbox/benchmark/theBenchmark.p') ).
fof(f8,axiom,
! [X,Y,State] :
( ~ holds(clear(Y),State)
| ~ holds(holding(X),State)
| holds(clear(X),do(putdown(X,Y),State)) ),
file('/export/starexec/sandbox/benchmark/theBenchmark.p') ).
fof(f9,axiom,
! [X,Y,Z,W,State] :
( ~ holds(on(X,Y),State)
| holds(on(X,Y),do(putdown(Z,W),State)) ),
file('/export/starexec/sandbox/benchmark/theBenchmark.p') ).
fof(f10,axiom,
! [Z,X,Y,State] :
( ~ differ(Z,Y)
| ~ holds(clear(Z),State)
| holds(clear(Z),do(putdown(X,Y),State)) ),
file('/export/starexec/sandbox/benchmark/theBenchmark.p') ).
fof(f11,axiom,
! [X,Y] :
( ~ differ(Y,X)
| differ(X,Y) ),
file('/export/starexec/sandbox/benchmark/theBenchmark.p') ).
fof(f12,axiom,
differ(a,b),
file('/export/starexec/sandbox/benchmark/theBenchmark.p') ).
fof(f13,axiom,
differ(a,c),
file('/export/starexec/sandbox/benchmark/theBenchmark.p') ).
fof(f14,axiom,
differ(a,d),
file('/export/starexec/sandbox/benchmark/theBenchmark.p') ).
fof(f15,axiom,
differ(a,table),
file('/export/starexec/sandbox/benchmark/theBenchmark.p') ).
fof(f16,axiom,
differ(b,c),
file('/export/starexec/sandbox/benchmark/theBenchmark.p') ).
fof(f19,axiom,
differ(c,d),
file('/export/starexec/sandbox/benchmark/theBenchmark.p') ).
fof(f20,axiom,
differ(c,table),
file('/export/starexec/sandbox/benchmark/theBenchmark.p') ).
fof(f21,axiom,
differ(d,table),
file('/export/starexec/sandbox/benchmark/theBenchmark.p') ).
fof(f24,axiom,
holds(on(c,d),s0),
file('/export/starexec/sandbox/benchmark/theBenchmark.p') ).
fof(f26,axiom,
holds(clear(a),s0),
file('/export/starexec/sandbox/benchmark/theBenchmark.p') ).
fof(f27,axiom,
holds(clear(b),s0),
file('/export/starexec/sandbox/benchmark/theBenchmark.p') ).
fof(f28,axiom,
holds(clear(c),s0),
file('/export/starexec/sandbox/benchmark/theBenchmark.p') ).
fof(f29,axiom,
holds(empty,s0),
file('/export/starexec/sandbox/benchmark/theBenchmark.p') ).
fof(f30,axiom,
! [State] : holds(clear(table),State),
file('/export/starexec/sandbox/benchmark/theBenchmark.p') ).
fof(f31,negated_conjecture,
! [State] : ~ holds(and(on(a,b),on(d,c)),State),
file('/export/starexec/sandbox/benchmark/theBenchmark.p') ).
fof(f32,plain,
! [Y,State] :
( ~ holds(Y,State)
| ! [X] :
( ~ holds(X,State)
| holds(and(X,Y),State) ) ),
inference(miniscoping,[status(thm)],[f1]) ).
fof(f33,plain,
! [X0,X1,X2] :
( ~ holds(X1,X2)
| ~ holds(X0,X2)
| holds(and(X0,X1),X2) ),
inference(cnf_transformation,[status(thm)],[f32]) ).
fof(f34,plain,
! [X] :
( ~ differ(X,table)
| ! [State] :
( ~ holds(clear(X),State)
| ~ holds(empty,State)
| holds(holding(X),do(pickup(X),State)) ) ),
inference(miniscoping,[status(thm)],[f2]) ).
fof(f35,plain,
! [X0,X1] :
( ~ differ(X0,table)
| ~ holds(clear(X0),X1)
| ~ holds(empty,X1)
| holds(holding(X0),do(pickup(X0),X1)) ),
inference(cnf_transformation,[status(thm)],[f34]) ).
fof(f36,plain,
! [State] :
( ~ holds(empty,State)
| ! [X] :
( ~ holds(clear(X),State)
| ! [Y] :
( ~ holds(on(X,Y),State)
| holds(clear(Y),do(pickup(X),State)) ) ) ),
inference(miniscoping,[status(thm)],[f3]) ).
fof(f37,plain,
! [X0,X1,X2] :
( ~ holds(empty,X2)
| ~ holds(clear(X1),X2)
| ~ holds(on(X1,X0),X2)
| holds(clear(X0),do(pickup(X1),X2)) ),
inference(cnf_transformation,[status(thm)],[f36]) ).
fof(f38,plain,
! [X,Z] :
( ~ differ(X,Z)
| ! [Y,State] :
( ~ holds(on(X,Y),State)
| holds(on(X,Y),do(pickup(Z),State)) ) ),
inference(miniscoping,[status(thm)],[f4]) ).
fof(f39,plain,
! [X0,X1,X2,X3] :
( ~ differ(X0,X2)
| ~ holds(on(X0,X1),X3)
| holds(on(X0,X1),do(pickup(X2),X3)) ),
inference(cnf_transformation,[status(thm)],[f38]) ).
fof(f40,plain,
! [X,Z] :
( ~ differ(X,Z)
| ! [State] :
( ~ holds(clear(X),State)
| holds(clear(X),do(pickup(Z),State)) ) ),
inference(miniscoping,[status(thm)],[f5]) ).
fof(f41,plain,
! [X0,X1,X2] :
( ~ differ(X0,X1)
| ~ holds(clear(X0),X2)
| holds(clear(X0),do(pickup(X1),X2)) ),
inference(cnf_transformation,[status(thm)],[f40]) ).
fof(f42,plain,
! [Y,State] :
( ~ holds(clear(Y),State)
| ! [X] :
( ~ holds(holding(X),State)
| holds(empty,do(putdown(X,Y),State)) ) ),
inference(miniscoping,[status(thm)],[f6]) ).
fof(f43,plain,
! [X0,X1,X2] :
( ~ holds(clear(X1),X2)
| ~ holds(holding(X0),X2)
| holds(empty,do(putdown(X0,X1),X2)) ),
inference(cnf_transformation,[status(thm)],[f42]) ).
fof(f44,plain,
! [Y,State] :
( ~ holds(clear(Y),State)
| ! [X] :
( ~ holds(holding(X),State)
| holds(on(X,Y),do(putdown(X,Y),State)) ) ),
inference(miniscoping,[status(thm)],[f7]) ).
fof(f45,plain,
! [X0,X1,X2] :
( ~ holds(clear(X1),X2)
| ~ holds(holding(X0),X2)
| holds(on(X0,X1),do(putdown(X0,X1),X2)) ),
inference(cnf_transformation,[status(thm)],[f44]) ).
fof(f46,plain,
! [Y,State] :
( ~ holds(clear(Y),State)
| ! [X] :
( ~ holds(holding(X),State)
| holds(clear(X),do(putdown(X,Y),State)) ) ),
inference(miniscoping,[status(thm)],[f8]) ).
fof(f47,plain,
! [X0,X1,X2] :
( ~ holds(clear(X1),X2)
| ~ holds(holding(X0),X2)
| holds(clear(X0),do(putdown(X0,X1),X2)) ),
inference(cnf_transformation,[status(thm)],[f46]) ).
fof(f48,plain,
! [X,Y,State] :
( ~ holds(on(X,Y),State)
| ! [Z,W] : holds(on(X,Y),do(putdown(Z,W),State)) ),
inference(miniscoping,[status(thm)],[f9]) ).
fof(f49,plain,
! [X0,X1,X2,X3,X4] :
( ~ holds(on(X0,X1),X4)
| holds(on(X0,X1),do(putdown(X2,X3),X4)) ),
inference(cnf_transformation,[status(thm)],[f48]) ).
fof(f50,plain,
! [Z,Y] :
( ~ differ(Z,Y)
| ! [State] :
( ~ holds(clear(Z),State)
| ! [X] : holds(clear(Z),do(putdown(X,Y),State)) ) ),
inference(miniscoping,[status(thm)],[f10]) ).
fof(f51,plain,
! [X0,X1,X2,X3] :
( ~ differ(X0,X2)
| ~ holds(clear(X0),X3)
| holds(clear(X0),do(putdown(X1,X2),X3)) ),
inference(cnf_transformation,[status(thm)],[f50]) ).
fof(f52,plain,
! [X0,X1] :
( ~ differ(X1,X0)
| differ(X0,X1) ),
inference(cnf_transformation,[status(thm)],[f11]) ).
fof(f53,plain,
differ(a,b),
inference(cnf_transformation,[status(thm)],[f12]) ).
fof(f54,plain,
differ(a,c),
inference(cnf_transformation,[status(thm)],[f13]) ).
fof(f55,plain,
differ(a,d),
inference(cnf_transformation,[status(thm)],[f14]) ).
fof(f56,plain,
differ(a,table),
inference(cnf_transformation,[status(thm)],[f15]) ).
fof(f57,plain,
differ(b,c),
inference(cnf_transformation,[status(thm)],[f16]) ).
fof(f60,plain,
differ(c,d),
inference(cnf_transformation,[status(thm)],[f19]) ).
fof(f61,plain,
differ(c,table),
inference(cnf_transformation,[status(thm)],[f20]) ).
fof(f62,plain,
differ(d,table),
inference(cnf_transformation,[status(thm)],[f21]) ).
fof(f65,plain,
holds(on(c,d),s0),
inference(cnf_transformation,[status(thm)],[f24]) ).
fof(f67,plain,
holds(clear(a),s0),
inference(cnf_transformation,[status(thm)],[f26]) ).
fof(f68,plain,
holds(clear(b),s0),
inference(cnf_transformation,[status(thm)],[f27]) ).
fof(f69,plain,
holds(clear(c),s0),
inference(cnf_transformation,[status(thm)],[f28]) ).
fof(f70,plain,
holds(empty,s0),
inference(cnf_transformation,[status(thm)],[f29]) ).
fof(f71,plain,
! [X0] : holds(clear(table),X0),
inference(cnf_transformation,[status(thm)],[f30]) ).
fof(f72,plain,
! [X0] : ~ holds(and(on(a,b),on(d,c)),X0),
inference(cnf_transformation,[status(thm)],[f31]) ).
fof(f73,plain,
! [X0] :
( ~ holds(on(d,c),X0)
| ~ holds(on(a,b),X0) ),
inference(resolution,[status(thm)],[f33,f72]) ).
fof(f79,plain,
differ(c,b),
inference(resolution,[status(thm)],[f52,f57]) ).
fof(f82,plain,
differ(c,a),
inference(resolution,[status(thm)],[f52,f54]) ).
fof(f83,plain,
differ(b,a),
inference(resolution,[status(thm)],[f52,f53]) ).
fof(f99,plain,
! [X0] :
( ~ holds(on(a,b),do(putdown(d,c),X0))
| ~ holds(clear(c),X0)
| ~ holds(holding(d),X0) ),
inference(resolution,[status(thm)],[f45,f73]) ).
fof(f103,plain,
! [X0] :
( ~ holds(on(a,b),X0)
| ~ holds(clear(c),X0)
| ~ holds(holding(d),X0) ),
inference(resolution,[status(thm)],[f99,f49]) ).
fof(f106,plain,
! [X0,X1] :
( ~ differ(a,X0)
| ~ holds(on(a,b),X1)
| ~ holds(clear(c),do(pickup(X0),X1))
| ~ holds(holding(d),do(pickup(X0),X1)) ),
inference(resolution,[status(thm)],[f103,f39]) ).
fof(f109,plain,
! [X0] :
( ~ differ(d,table)
| ~ holds(clear(d),X0)
| ~ holds(empty,X0)
| ~ differ(a,d)
| ~ holds(on(a,b),X0)
| ~ holds(clear(c),do(pickup(d),X0)) ),
inference(resolution,[status(thm)],[f106,f35]) ).
fof(f110,plain,
! [X0] :
( ~ differ(d,table)
| ~ holds(clear(d),X0)
| ~ holds(empty,X0)
| ~ holds(on(a,b),X0)
| ~ holds(clear(c),do(pickup(d),X0)) ),
inference(forward_subsumption_resolution,[status(thm)],[f109,f55]) ).
fof(f120,plain,
! [X0] :
( ~ holds(clear(d),X0)
| ~ holds(empty,X0)
| ~ holds(on(a,b),X0)
| ~ holds(clear(c),do(pickup(d),X0)) ),
inference(forward_subsumption_resolution,[status(thm)],[f110,f62]) ).
fof(f121,plain,
! [X0] :
( ~ differ(c,d)
| ~ holds(clear(c),X0)
| ~ holds(clear(d),X0)
| ~ holds(empty,X0)
| ~ holds(on(a,b),X0) ),
inference(resolution,[status(thm)],[f120,f41]) ).
fof(f123,plain,
! [X0] :
( ~ holds(clear(c),X0)
| ~ holds(clear(d),X0)
| ~ holds(empty,X0)
| ~ holds(on(a,b),X0) ),
inference(forward_subsumption_resolution,[status(thm)],[f121,f60]) ).
fof(f126,plain,
! [X0,X1,X2] :
( ~ holds(on(a,b),X2)
| ~ holds(clear(c),do(putdown(X0,X1),X2))
| ~ holds(clear(d),do(putdown(X0,X1),X2))
| ~ holds(empty,do(putdown(X0,X1),X2)) ),
inference(resolution,[status(thm)],[f123,f49]) ).
fof(f157,plain,
! [X0,X1,X2] :
( ~ differ(d,X1)
| ~ holds(clear(d),X2)
| ~ holds(on(a,b),X2)
| ~ holds(clear(c),do(putdown(X0,X1),X2))
| ~ holds(empty,do(putdown(X0,X1),X2)) ),
inference(resolution,[status(thm)],[f126,f51]) ).
fof(f162,plain,
! [X0,X1] :
( ~ holds(clear(X0),X1)
| ~ holds(holding(c),X1)
| ~ differ(d,X0)
| ~ holds(clear(d),X1)
| ~ holds(on(a,b),X1)
| ~ holds(empty,do(putdown(c,X0),X1)) ),
inference(resolution,[status(thm)],[f157,f47]) ).
fof(f164,plain,
! [X0,X1] :
( ~ holds(clear(X1),X0)
| ~ holds(holding(c),X0)
| ~ differ(d,X1)
| ~ holds(clear(d),X0)
| ~ holds(on(a,b),X0) ),
inference(forward_subsumption_resolution,[status(thm)],[f162,f43]) ).
fof(f167,plain,
! [X0,X1,X2] :
( ~ differ(a,X0)
| ~ holds(on(a,b),X1)
| ~ holds(clear(X2),do(pickup(X0),X1))
| ~ holds(holding(c),do(pickup(X0),X1))
| ~ differ(d,X2)
| ~ holds(clear(d),do(pickup(X0),X1)) ),
inference(resolution,[status(thm)],[f164,f39]) ).
fof(f300,plain,
! [X0,X1] :
( ~ differ(c,table)
| ~ holds(clear(c),X0)
| ~ holds(empty,X0)
| ~ differ(a,c)
| ~ holds(on(a,b),X0)
| ~ holds(clear(X1),do(pickup(c),X0))
| ~ differ(d,X1)
| ~ holds(clear(d),do(pickup(c),X0)) ),
inference(resolution,[status(thm)],[f167,f35]) ).
fof(f301,plain,
! [X0,X1] :
( ~ differ(c,table)
| ~ holds(clear(c),X0)
| ~ holds(empty,X0)
| ~ holds(on(a,b),X0)
| ~ holds(clear(X1),do(pickup(c),X0))
| ~ differ(d,X1)
| ~ holds(clear(d),do(pickup(c),X0)) ),
inference(forward_subsumption_resolution,[status(thm)],[f300,f54]) ).
fof(f369,plain,
! [X0,X1] :
( ~ holds(clear(c),X0)
| ~ holds(empty,X0)
| ~ holds(on(a,b),X0)
| ~ holds(clear(X1),do(pickup(c),X0))
| ~ differ(d,X1)
| ~ holds(clear(d),do(pickup(c),X0)) ),
inference(forward_subsumption_resolution,[status(thm)],[f301,f61]) ).
fof(f371,plain,
! [X0,X1] :
( ~ holds(empty,X1)
| ~ holds(clear(c),X1)
| ~ holds(on(c,d),X1)
| ~ holds(clear(c),X1)
| ~ holds(empty,X1)
| ~ holds(on(a,b),X1)
| ~ holds(clear(X0),do(pickup(c),X1))
| ~ differ(d,X0) ),
inference(resolution,[status(thm)],[f369,f37]) ).
fof(f372,plain,
! [X0,X1] :
( ~ holds(on(c,d),X1)
| ~ holds(clear(c),X1)
| ~ holds(empty,X1)
| ~ holds(on(a,b),X1)
| ~ holds(clear(X0),do(pickup(c),X1))
| ~ differ(d,X0) ),
inference(duplicate_literals_removal,[status(thm)],[f371]) ).
fof(f392,plain,
! [X0] :
( ~ holds(on(c,d),X0)
| ~ holds(clear(c),X0)
| ~ holds(empty,X0)
| ~ holds(on(a,b),X0)
| ~ differ(d,table) ),
inference(resolution,[status(thm)],[f372,f71]) ).
fof(f395,plain,
! [X0] :
( ~ holds(on(c,d),X0)
| ~ holds(clear(c),X0)
| ~ holds(empty,X0)
| ~ holds(on(a,b),X0) ),
inference(forward_subsumption_resolution,[status(thm)],[f392,f62]) ).
fof(f399,plain,
! [X0,X1,X2] :
( ~ holds(on(c,d),X2)
| ~ holds(clear(c),do(putdown(X0,X1),X2))
| ~ holds(empty,do(putdown(X0,X1),X2))
| ~ holds(on(a,b),do(putdown(X0,X1),X2)) ),
inference(resolution,[status(thm)],[f395,f49]) ).
fof(f424,plain,
! [X0] :
( ~ holds(clear(b),X0)
| ~ holds(holding(a),X0)
| ~ holds(on(c,d),X0)
| ~ holds(clear(c),do(putdown(a,b),X0))
| ~ holds(empty,do(putdown(a,b),X0)) ),
inference(resolution,[status(thm)],[f399,f45]) ).
fof(f426,plain,
! [X0] :
( ~ holds(clear(b),X0)
| ~ holds(holding(a),X0)
| ~ holds(on(c,d),X0)
| ~ holds(clear(c),do(putdown(a,b),X0)) ),
inference(forward_subsumption_resolution,[status(thm)],[f424,f43]) ).
fof(f427,plain,
! [X0] :
( ~ differ(c,b)
| ~ holds(clear(c),X0)
| ~ holds(clear(b),X0)
| ~ holds(holding(a),X0)
| ~ holds(on(c,d),X0) ),
inference(resolution,[status(thm)],[f426,f51]) ).
fof(f428,plain,
! [X0] :
( ~ holds(clear(c),X0)
| ~ holds(clear(b),X0)
| ~ holds(holding(a),X0)
| ~ holds(on(c,d),X0) ),
inference(forward_subsumption_resolution,[status(thm)],[f427,f79]) ).
fof(f432,plain,
! [X0,X1] :
( ~ differ(c,X0)
| ~ holds(on(c,d),X1)
| ~ holds(clear(c),do(pickup(X0),X1))
| ~ holds(clear(b),do(pickup(X0),X1))
| ~ holds(holding(a),do(pickup(X0),X1)) ),
inference(resolution,[status(thm)],[f428,f39]) ).
fof(f454,plain,
! [X0] :
( ~ differ(a,table)
| ~ holds(clear(a),X0)
| ~ holds(empty,X0)
| ~ differ(c,a)
| ~ holds(on(c,d),X0)
| ~ holds(clear(c),do(pickup(a),X0))
| ~ holds(clear(b),do(pickup(a),X0)) ),
inference(resolution,[status(thm)],[f432,f35]) ).
fof(f455,plain,
! [X0] :
( ~ differ(a,table)
| ~ holds(clear(a),X0)
| ~ holds(empty,X0)
| ~ holds(on(c,d),X0)
| ~ holds(clear(c),do(pickup(a),X0))
| ~ holds(clear(b),do(pickup(a),X0)) ),
inference(forward_subsumption_resolution,[status(thm)],[f454,f82]) ).
fof(f467,plain,
! [X0] :
( ~ holds(clear(a),X0)
| ~ holds(empty,X0)
| ~ holds(on(c,d),X0)
| ~ holds(clear(c),do(pickup(a),X0))
| ~ holds(clear(b),do(pickup(a),X0)) ),
inference(forward_subsumption_resolution,[status(thm)],[f455,f56]) ).
fof(f468,plain,
! [X0] :
( ~ differ(c,a)
| ~ holds(clear(c),X0)
| ~ holds(clear(a),X0)
| ~ holds(empty,X0)
| ~ holds(on(c,d),X0)
| ~ holds(clear(b),do(pickup(a),X0)) ),
inference(resolution,[status(thm)],[f467,f41]) ).
fof(f470,plain,
! [X0] :
( ~ holds(clear(c),X0)
| ~ holds(clear(a),X0)
| ~ holds(empty,X0)
| ~ holds(on(c,d),X0)
| ~ holds(clear(b),do(pickup(a),X0)) ),
inference(forward_subsumption_resolution,[status(thm)],[f468,f82]) ).
fof(f472,plain,
! [X0] :
( ~ differ(b,a)
| ~ holds(clear(b),X0)
| ~ holds(clear(c),X0)
| ~ holds(clear(a),X0)
| ~ holds(empty,X0)
| ~ holds(on(c,d),X0) ),
inference(resolution,[status(thm)],[f470,f41]) ).
fof(f474,plain,
! [X0] :
( ~ holds(clear(b),X0)
| ~ holds(clear(c),X0)
| ~ holds(clear(a),X0)
| ~ holds(empty,X0)
| ~ holds(on(c,d),X0) ),
inference(forward_subsumption_resolution,[status(thm)],[f472,f83]) ).
fof(f476,plain,
( ~ holds(clear(b),s0)
| ~ holds(clear(c),s0)
| ~ holds(clear(a),s0)
| ~ holds(empty,s0) ),
inference(resolution,[status(thm)],[f474,f65]) ).
fof(f480,plain,
( ~ holds(clear(b),s0)
| ~ holds(clear(c),s0)
| ~ holds(clear(a),s0) ),
inference(forward_subsumption_resolution,[status(thm)],[f476,f70]) ).
fof(f482,plain,
( ~ holds(clear(b),s0)
| ~ holds(clear(c),s0) ),
inference(forward_subsumption_resolution,[status(thm)],[f480,f67]) ).
fof(f483,plain,
~ holds(clear(b),s0),
inference(resolution,[status(thm)],[f482,f69]) ).
fof(f484,plain,
$false,
inference(forward_subsumption_resolution,[status(thm)],[f483,f68]) ).
%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.00/0.05 % Problem : PLA018-1 : TPTP v9.3.1. Released v1.1.0.
% 0.00/0.06 % Command : drodi -timeout(300) /export/starexec/sandbox/benchmark/theBenchmark.p
% 0.19/5.46 % Computer : n002.cluster.edu
% 0.19/5.46 % Model : x86_64 x86_64
% 0.19/5.46 % CPU : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz
% 0.19/5.46 % Memory : 8046.5625MB
% 0.19/5.46 % OS : Linux 6.8.0-71-generic
% 0.19/5.46 % CPULimit : 300
% 0.19/5.46 % WCLimit : 300
% 0.19/5.46 % DateTime : Mon Sep 21 03:35:07 UTC 2026
% 0.19/5.46 % CPUTime :
% 0.19/5.47 % Drodi V4.1.1
% 0.23/5.62 % Refutation found
% 0.23/5.62 % SZS status Unsatisfiable for theBenchmark: Theory is unsatisfiable
% 0.23/5.62 % SZS output start CNFRefutation for theBenchmark
% See solution above
% 0.23/5.67 % Elapsed time: 0.192068 seconds
% 0.23/5.67 % CPU time: 1.147417 seconds
% 0.23/5.67 % Total memory used: 78.340 MB
% 0.23/5.67 % Net memory used: 76.397 MB
%------------------------------------------------------------------------------