%------------------------------------------------------------------------------
% File : Drodi---4.1.1
% Problem : SWC288-1 : TPTP v9.3.1. Released v2.4.0.
% Transfm : none
% Format : tptp:raw
% Command : drodi -timeout(300) /export/starexec/sandbox2/benchmark/theBenchmark.p
% Computer : n014.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 02:40:39 PM UTC 2026
% Result : Unsatisfiable 0.18s 0.48s
% Output : CNFRefutation 0.18s
% Verified :
% SZS Type : Refutation
% Derivation depth : 5
% Number of leaves : 10
% Syntax : Number of formulae : 30 ( 10 unt; 4 def)
% Number of atoms : 52 ( 12 equ)
% Maximal formula atoms : 3 ( 1 avg)
% Number of connectives : 39 ( 17 ~; 18 |; 0 &)
% ( 4 <=>; 0 =>; 0 <=; 0 <~>)
% Maximal formula depth : 4 ( 2 avg)
% Maximal term depth : 2 ( 1 avg)
% Number of predicates : 8 ( 6 usr; 5 prp; 0-2 aty)
% Number of functors : 5 ( 5 usr; 4 con; 0-2 aty)
% Number of variables : 2 ( 2 !; 0 ?)
% Comments :
%------------------------------------------------------------------------------
fof(f3,axiom,
strictorderedP(nil),
file('/export/starexec/sandbox2/benchmark/theBenchmark.p') ).
fof(f66,axiom,
! [U] :
( strictorderedP(cons(U,nil))
| ~ ssItem(U) ),
file('/export/starexec/sandbox2/benchmark/theBenchmark.p') ).
fof(f191,negated_conjecture,
sk1 = sk3,
file('/export/starexec/sandbox2/benchmark/theBenchmark.p') ).
fof(f192,negated_conjecture,
~ strictorderedP(sk1),
file('/export/starexec/sandbox2/benchmark/theBenchmark.p') ).
fof(f194,negated_conjecture,
( nil = sk3
| ssItem(sk5) ),
file('/export/starexec/sandbox2/benchmark/theBenchmark.p') ).
fof(f203,negated_conjecture,
( nil = sk3
| cons(sk5,nil) = sk3 ),
file('/export/starexec/sandbox2/benchmark/theBenchmark.p') ).
fof(f209,plain,
strictorderedP(nil),
inference(cnf_transformation,[status(thm)],[f3]) ).
fof(f272,plain,
! [X0] :
( strictorderedP(cons(X0,nil))
| ~ ssItem(X0) ),
inference(cnf_transformation,[status(thm)],[f66]) ).
fof(f442,plain,
sk1 = sk3,
inference(cnf_transformation,[status(thm)],[f191]) ).
fof(f443,plain,
~ strictorderedP(sk1),
inference(cnf_transformation,[status(thm)],[f192]) ).
fof(f445,plain,
( nil = sk3
| ssItem(sk5) ),
inference(cnf_transformation,[status(thm)],[f194]) ).
fof(f456,plain,
( nil = sk3
| cons(sk5,nil) = sk3 ),
inference(cnf_transformation,[status(thm)],[f203]) ).
fof(f469,definition,
( sQ2_spl
<=> ssItem(sk5) ),
introduced(definition,[new_symbols(definition,[sQ2_spl])],[split_symbol_definition]) ).
fof(f476,definition,
( sQ4_spl
<=> nil = sk3 ),
introduced(definition,[new_symbols(definition,[sQ4_spl])],[split_symbol_definition]) ).
fof(f477,plain,
( ~ sQ4_spl
| nil = sk3 ),
inference(component_clause,[status(thm)],[f476]) ).
fof(f479,plain,
( sQ4_spl
| sQ2_spl ),
inference(split_clause,[status(thm)],[f445,f469,f476]) ).
fof(f488,definition,
( sQ7_spl
<=> cons(sk5,nil) = sk3 ),
introduced(definition,[new_symbols(definition,[sQ7_spl])],[split_symbol_definition]) ).
fof(f489,plain,
( ~ sQ7_spl
| cons(sk5,nil) = sk3 ),
inference(component_clause,[status(thm)],[f488]) ).
fof(f506,plain,
( sQ4_spl
| sQ7_spl ),
inference(split_clause,[status(thm)],[f456,f488,f476]) ).
fof(f541,plain,
~ strictorderedP(sk3),
inference(forward_demodulation,[status(thm)],[f442,f443]) ).
fof(f543,plain,
( ~ sQ4_spl
| strictorderedP(sk3) ),
inference(backward_demodulation,[status(thm)],[f477,f209]) ).
fof(f544,plain,
( ~ sQ4_spl
| $false ),
inference(forward_subsumption_resolution,[status(thm)],[f543,f541]) ).
fof(f545,plain,
~ sQ4_spl,
inference(contradiction_clause,[status(thm)],[f544]) ).
fof(f546,plain,
( ~ sQ7_spl
| strictorderedP(sk3)
| ~ ssItem(sk5) ),
inference(paramodulation,[status(thm)],[f489,f272]) ).
fof(f547,definition,
( sQ11_spl
<=> strictorderedP(sk3) ),
introduced(definition,[new_symbols(definition,[sQ11_spl])],[split_symbol_definition]) ).
fof(f548,plain,
( ~ sQ11_spl
| strictorderedP(sk3) ),
inference(component_clause,[status(thm)],[f547]) ).
fof(f550,plain,
( ~ sQ7_spl
| sQ11_spl
| ~ sQ2_spl ),
inference(split_clause,[status(thm)],[f546,f469,f547,f488]) ).
fof(f551,plain,
( ~ sQ11_spl
| $false ),
inference(forward_subsumption_resolution,[status(thm)],[f548,f541]) ).
fof(f552,plain,
~ sQ11_spl,
inference(contradiction_clause,[status(thm)],[f551]) ).
fof(f553,plain,
$false,
inference(sat_refutation,[status(thm)],[f479,f506,f545,f550,f552]) ).
%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.00/0.05 % Problem : SWC288-1 : TPTP v9.3.1. Released v2.4.0.
% 0.00/0.06 % Command : drodi -timeout(300) /export/starexec/sandbox2/benchmark/theBenchmark.p
% 0.18/0.42 % Computer : n014.cluster.edu
% 0.18/0.42 % Model : x86_64 x86_64
% 0.18/0.42 % CPU : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz
% 0.18/0.42 % Memory : 8046.5625MB
% 0.18/0.42 % OS : Linux 6.8.0-71-generic
% 0.18/0.43 % CPULimit : 300
% 0.18/0.43 % WCLimit : 300
% 0.18/0.43 % DateTime : Mon Sep 21 08:12:20 UTC 2026
% 0.18/0.43 % CPUTime :
% 0.18/0.45 % Drodi V4.1.1
% 0.18/0.48 % Refutation found
% 0.18/0.48 % SZS status Unsatisfiable for theBenchmark: Theory is unsatisfiable
% 0.18/0.48 % SZS output start CNFRefutation for theBenchmark
% See solution above
% 0.25/0.51 % Elapsed time: 0.066957 seconds
% 0.25/0.51 % CPU time: 0.149353 seconds
% 0.25/0.51 % Total memory used: 44.269 MB
% 0.25/0.51 % Net memory used: 44.217 MB
%------------------------------------------------------------------------------