%------------------------------------------------------------------------------
% File : Drodi---4.1.1
% Problem : SWC209+1 : TPTP v9.3.1. Released v2.4.0.
% Transfm : none
% Format : tptp:raw
% Command : drodi -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 02:40:24 PM UTC 2026
% Result : Theorem 0.03s 11.37s
% Output : CNFRefutation 0.03s
% Verified :
% SZS Type : Refutation
% Derivation depth : 10
% Number of leaves : 2
% Syntax : Number of formulae : 23 ( 12 unt; 1 def)
% Number of atoms : 91 ( 32 equ)
% Maximal formula atoms : 12 ( 3 avg)
% Number of connectives : 97 ( 29 ~; 24 |; 35 &)
% ( 1 <=>; 8 =>; 0 <=; 0 <~>)
% Maximal formula depth : 17 ( 5 avg)
% Maximal term depth : 1 ( 1 avg)
% Number of predicates : 6 ( 4 usr; 1 prp; 0-2 aty)
% Number of functors : 5 ( 5 usr; 5 con; 0-0 aty)
% Number of variables : 28 ( 20 !; 8 ?)
% Comments :
%------------------------------------------------------------------------------
fof(f96,conjecture,
! [U] :
( ssList(U)
=> ! [V] :
( ssList(V)
=> ! [W] :
( ssList(W)
=> ! [X] :
( ssList(X)
=> ( ( ( ~ segmentP(X,W)
| ~ neq(W,nil) )
& ( nil != W
| nil != X ) )
| neq(U,nil)
| ~ neq(V,nil)
| U != W
| V != X ) ) ) ) ),
file('/export/starexec/sandbox2/benchmark/theBenchmark.p') ).
fof(f97,negated_conjecture,
~ ! [U] :
( ssList(U)
=> ! [V] :
( ssList(V)
=> ! [W] :
( ssList(W)
=> ! [X] :
( ssList(X)
=> ( ( ( ~ segmentP(X,W)
| ~ neq(W,nil) )
& ( nil != W
| nil != X ) )
| neq(U,nil)
| ~ neq(V,nil)
| U != W
| V != X ) ) ) ) ),
inference(negated_conjecture,[status(cth)],[f96]) ).
fof(f415,plain,
? [U] :
( ? [V] :
( ? [W] :
( ? [X] :
( ( ( segmentP(X,W)
& neq(W,nil) )
| ( nil = W
& nil = X ) )
& ~ neq(U,nil)
& neq(V,nil)
& U = W
& V = X
& ssList(X) )
& ssList(W) )
& ssList(V) )
& ssList(U) ),
inference(pre_NNF_transformation,[status(thm)],[f97]) ).
fof(f416,definition,
! [W,X] :
( sP0_prd(X,W)
<=> ( nil = W
& nil = X ) ),
introduced(definition,[new_symbols(definition,[sP0_prd])],[]) ).
fof(f417,plain,
? [U] :
( ? [V] :
( ? [W] :
( ? [X] :
( ( ( segmentP(X,W)
& neq(W,nil) )
| sP0_prd(X,W) )
& ~ neq(U,nil)
& neq(V,nil)
& U = W
& V = X
& ssList(X) )
& ssList(W) )
& ssList(V) )
& ssList(U) ),
inference(formula_renaming,[status(thm)],[f415,f416]) ).
fof(f418,plain,
( ( ( segmentP(sK50_skl,sK49_skl)
& neq(sK49_skl,nil) )
| sP0_prd(sK50_skl,sK49_skl) )
& ~ neq(sK47_skl,nil)
& neq(sK48_skl,nil)
& sK47_skl = sK49_skl
& sK48_skl = sK50_skl
& ssList(sK50_skl)
& ssList(sK49_skl)
& ssList(sK48_skl)
& ssList(sK47_skl) ),
inference(skolemize,[status(esa),new_symbols(skolem,[sK47_skl,sK48_skl,sK49_skl,sK50_skl]),skolemize(U,sK47_skl),skolemize(V,sK48_skl),skolemize(W,sK49_skl),skolemize(X,sK50_skl)],[f417]) ).
fof(f423,plain,
sK48_skl = sK50_skl,
inference(cnf_transformation,[status(thm)],[f418]) ).
fof(f424,plain,
sK47_skl = sK49_skl,
inference(cnf_transformation,[status(thm)],[f418]) ).
fof(f425,plain,
neq(sK48_skl,nil),
inference(cnf_transformation,[status(thm)],[f418]) ).
fof(f426,plain,
~ neq(sK47_skl,nil),
inference(cnf_transformation,[status(thm)],[f418]) ).
fof(f427,plain,
( neq(sK49_skl,nil)
| sP0_prd(sK50_skl,sK49_skl) ),
inference(cnf_transformation,[status(thm)],[f418]) ).
fof(f429,plain,
! [W,X] :
( ( nil != W
| nil != X
| sP0_prd(X,W) )
& ( ( nil = W
& nil = X )
| ~ sP0_prd(X,W) ) ),
inference(NNF_transformation,[status(thm)],[f416]) ).
fof(f430,plain,
( ! [W,X] :
( nil != W
| nil != X
| sP0_prd(X,W) )
& ! [W,X] :
( ( nil = W
& nil = X )
| ~ sP0_prd(X,W) ) ),
inference(miniscoping,[status(thm)],[f429]) ).
fof(f431,plain,
! [X0,X1] :
( nil = X0
| ~ sP0_prd(X0,X1) ),
inference(cnf_transformation,[status(thm)],[f430]) ).
fof(f432,plain,
! [X0,X1] :
( nil = X1
| ~ sP0_prd(X0,X1) ),
inference(cnf_transformation,[status(thm)],[f430]) ).
fof(f467,plain,
neq(sK50_skl,nil),
inference(forward_demodulation,[status(thm)],[f423,f425]) ).
fof(f468,plain,
~ neq(sK49_skl,nil),
inference(forward_demodulation,[status(thm)],[f424,f426]) ).
fof(f473,plain,
sP0_prd(sK50_skl,sK49_skl),
inference(forward_subsumption_resolution,[status(thm)],[f427,f468]) ).
fof(f474,plain,
nil = sK49_skl,
inference(resolution,[status(thm)],[f473,f432]) ).
fof(f475,plain,
nil = sK50_skl,
inference(resolution,[status(thm)],[f473,f431]) ).
fof(f477,plain,
~ neq(nil,nil),
inference(backward_demodulation,[status(thm)],[f474,f468]) ).
fof(f480,plain,
neq(nil,nil),
inference(backward_demodulation,[status(thm)],[f475,f467]) ).
fof(f486,plain,
$false,
inference(forward_subsumption_resolution,[status(thm)],[f480,f477]) ).
%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.00/0.01 % Problem : SWC209+1 : TPTP v9.3.1. Released v2.4.0.
% 0.00/0.02 % Command : drodi -timeout(300) /export/starexec/sandbox2/benchmark/theBenchmark.p
% 0.03/11.35 % Computer : n012.cluster.edu
% 0.03/11.35 % Model : x86_64 x86_64
% 0.03/11.35 % CPU : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz
% 0.03/11.35 % Memory : 8046.5625MB
% 0.03/11.35 % OS : Linux 6.8.0-71-generic
% 0.03/11.35 % CPULimit : 300
% 0.03/11.35 % WCLimit : 300
% 0.03/11.35 % DateTime : Mon Sep 21 08:04:36 UTC 2026
% 0.03/11.35 % CPUTime :
% 0.03/11.36 % Drodi V4.1.1
% 0.03/11.37 % Refutation found
% 0.03/11.37 % SZS status Theorem for theBenchmark: Theorem is valid
% 0.03/11.37 % SZS output start CNFRefutation for theBenchmark
% See solution above
% 0.03/11.38 % Elapsed time: 0.033478 seconds
% 0.03/11.38 % CPU time: 0.091980 seconds
% 0.03/11.38 % Total memory used: 76.018 MB
% 0.03/11.38 % Net memory used: 75.931 MB
%------------------------------------------------------------------------------