%------------------------------------------------------------------------------
% File : Drodi---4.1.1
% Problem : GEO221+1 : TPTP v9.3.1. Released v3.3.0.
% 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 12:24:35 PM UTC 2026
% Result : Theorem 0.10s 0.42s
% Output : CNFRefutation 0.10s
% Verified :
% SZS Type : Refutation
% Derivation depth : 7
% Number of leaves : 6
% Syntax : Number of formulae : 27 ( 9 unt; 2 def)
% Number of atoms : 63 ( 0 equ)
% Maximal formula atoms : 5 ( 2 avg)
% Number of connectives : 59 ( 23 ~; 29 |; 2 &)
% ( 2 <=>; 3 =>; 0 <=; 0 <~>)
% Maximal formula depth : 9 ( 4 avg)
% Maximal term depth : 2 ( 1 avg)
% Number of predicates : 6 ( 5 usr; 3 prp; 0-2 aty)
% Number of functors : 4 ( 4 usr; 3 con; 0-2 aty)
% Number of variables : 39 ( 36 !; 3 ?)
% Comments :
%------------------------------------------------------------------------------
fof(f20,axiom,
! [A,L] : ~ unorthogonal_lines(orthogonal_through_point(L,A),L),
file('/export/starexec/sandbox/benchmark/theBenchmark.p') ).
fof(f21,axiom,
! [A,L] : ~ apart_point_and_line(A,orthogonal_through_point(L,A)),
file('/export/starexec/sandbox/benchmark/theBenchmark.p') ).
fof(f22,axiom,
! [A,L,M,N] :
( distinct_lines(L,M)
=> ( unorthogonal_lines(M,N)
| unorthogonal_lines(L,N)
| apart_point_and_line(A,M)
| apart_point_and_line(A,L) ) ),
file('/export/starexec/sandbox/benchmark/theBenchmark.p') ).
fof(f23,conjecture,
! [A,B,L] :
( ~ apart_point_and_line(B,orthogonal_through_point(L,A))
=> ~ distinct_lines(orthogonal_through_point(L,A),orthogonal_through_point(L,B)) ),
file('/export/starexec/sandbox/benchmark/theBenchmark.p') ).
fof(f24,negated_conjecture,
~ ! [A,B,L] :
( ~ apart_point_and_line(B,orthogonal_through_point(L,A))
=> ~ distinct_lines(orthogonal_through_point(L,A),orthogonal_through_point(L,B)) ),
inference(negated_conjecture,[status(cth)],[f23]) ).
fof(f68,plain,
! [X0,X1] : ~ unorthogonal_lines(orthogonal_through_point(X0,X1),X0),
inference(cnf_transformation,[status(thm)],[f20]) ).
fof(f69,plain,
! [X0,X1] : ~ apart_point_and_line(X0,orthogonal_through_point(X1,X0)),
inference(cnf_transformation,[status(thm)],[f21]) ).
fof(f70,plain,
! [A,L,M,N] :
( unorthogonal_lines(M,N)
| unorthogonal_lines(L,N)
| apart_point_and_line(A,M)
| apart_point_and_line(A,L)
| ~ distinct_lines(L,M) ),
inference(pre_NNF_transformation,[status(thm)],[f22]) ).
fof(f71,plain,
! [L,M] :
( ! [N] :
( unorthogonal_lines(M,N)
| unorthogonal_lines(L,N)
| ! [A] :
( apart_point_and_line(A,M)
| apart_point_and_line(A,L) ) )
| ~ distinct_lines(L,M) ),
inference(miniscoping,[status(thm)],[f70]) ).
fof(f72,plain,
! [X0,X1,X2,X3] :
( unorthogonal_lines(X1,X3)
| unorthogonal_lines(X0,X3)
| apart_point_and_line(X2,X1)
| apart_point_and_line(X2,X0)
| ~ distinct_lines(X0,X1) ),
inference(cnf_transformation,[status(thm)],[f71]) ).
fof(f73,plain,
? [A,B,L] :
( distinct_lines(orthogonal_through_point(L,A),orthogonal_through_point(L,B))
& ~ apart_point_and_line(B,orthogonal_through_point(L,A)) ),
inference(pre_NNF_transformation,[status(thm)],[f24]) ).
fof(f74,plain,
( distinct_lines(orthogonal_through_point(sK2_skl,sK0_skl),orthogonal_through_point(sK2_skl,sK1_skl))
& ~ apart_point_and_line(sK1_skl,orthogonal_through_point(sK2_skl,sK0_skl)) ),
inference(skolemize,[status(esa),new_symbols(skolem,[sK0_skl,sK1_skl,sK2_skl]),skolemize(A,sK0_skl),skolemize(B,sK1_skl),skolemize(L,sK2_skl)],[f73]) ).
fof(f75,plain,
~ apart_point_and_line(sK1_skl,orthogonal_through_point(sK2_skl,sK0_skl)),
inference(cnf_transformation,[status(thm)],[f74]) ).
fof(f76,plain,
distinct_lines(orthogonal_through_point(sK2_skl,sK0_skl),orthogonal_through_point(sK2_skl,sK1_skl)),
inference(cnf_transformation,[status(thm)],[f74]) ).
fof(f84,definition,
! [X0] :
( sQ0_spl
<=> ( apart_point_and_line(X0,orthogonal_through_point(sK2_skl,sK1_skl))
| apart_point_and_line(X0,orthogonal_through_point(sK2_skl,sK0_skl)) ) ),
introduced(definition,[new_symbols(definition,[sQ0_spl])],[split_symbol_definition]) ).
fof(f85,plain,
! [X0] :
( ~ sQ0_spl
| apart_point_and_line(X0,orthogonal_through_point(sK2_skl,sK1_skl))
| apart_point_and_line(X0,orthogonal_through_point(sK2_skl,sK0_skl)) ),
inference(component_clause,[status(thm)],[f84]) ).
fof(f96,plain,
( ~ sQ0_spl
| apart_point_and_line(sK1_skl,orthogonal_through_point(sK2_skl,sK0_skl)) ),
inference(resolution,[status(thm)],[f85,f69]) ).
fof(f98,plain,
( ~ sQ0_spl
| $false ),
inference(forward_subsumption_resolution,[status(thm)],[f96,f75]) ).
fof(f99,plain,
~ sQ0_spl,
inference(contradiction_clause,[status(thm)],[f98]) ).
fof(f166,plain,
! [X0,X1] :
( unorthogonal_lines(orthogonal_through_point(sK2_skl,sK1_skl),X1)
| unorthogonal_lines(orthogonal_through_point(sK2_skl,sK0_skl),X1)
| apart_point_and_line(X0,orthogonal_through_point(sK2_skl,sK1_skl))
| apart_point_and_line(X0,orthogonal_through_point(sK2_skl,sK0_skl)) ),
inference(resolution,[status(thm)],[f72,f76]) ).
fof(f167,definition,
! [X1] :
( sQ7_spl
<=> ( unorthogonal_lines(orthogonal_through_point(sK2_skl,sK1_skl),X1)
| unorthogonal_lines(orthogonal_through_point(sK2_skl,sK0_skl),X1) ) ),
introduced(definition,[new_symbols(definition,[sQ7_spl])],[split_symbol_definition]) ).
fof(f168,plain,
! [X0] :
( ~ sQ7_spl
| unorthogonal_lines(orthogonal_through_point(sK2_skl,sK1_skl),X0)
| unorthogonal_lines(orthogonal_through_point(sK2_skl,sK0_skl),X0) ),
inference(component_clause,[status(thm)],[f167]) ).
fof(f170,plain,
( sQ7_spl
| sQ0_spl ),
inference(split_clause,[status(thm)],[f166,f84,f167]) ).
fof(f233,plain,
( ~ sQ7_spl
| unorthogonal_lines(orthogonal_through_point(sK2_skl,sK0_skl),sK2_skl) ),
inference(resolution,[status(thm)],[f168,f68]) ).
fof(f234,plain,
( ~ sQ7_spl
| $false ),
inference(forward_subsumption_resolution,[status(thm)],[f233,f68]) ).
fof(f235,plain,
~ sQ7_spl,
inference(contradiction_clause,[status(thm)],[f234]) ).
fof(f236,plain,
$false,
inference(sat_refutation,[status(thm)],[f99,f170,f235]) ).
%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.00/0.02 % Problem : GEO221+1 : TPTP v9.3.1. Released v3.3.0.
% 0.00/0.03 % Command : drodi -timeout(300) /export/starexec/sandbox/benchmark/theBenchmark.p
% 0.10/0.37 % Computer : n001.cluster.edu
% 0.10/0.37 % Model : x86_64 x86_64
% 0.10/0.37 % CPU : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz
% 0.10/0.37 % Memory : 8046.5625MB
% 0.10/0.37 % OS : Linux 6.8.0-71-generic
% 0.10/0.37 % CPULimit : 300
% 0.10/0.37 % WCLimit : 300
% 0.10/0.37 % DateTime : Sun Sep 20 13:49:42 UTC 2026
% 0.10/0.37 % CPUTime :
% 0.10/0.38 % Drodi V4.1.1
% 0.10/0.42 % Refutation found
% 0.10/0.42 % SZS status Theorem for theBenchmark: Theorem is valid
% 0.10/0.42 % SZS output start CNFRefutation for theBenchmark
% See solution above
% 0.10/0.45 % Elapsed time: 0.061899 seconds
% 0.10/0.45 % CPU time: 0.303984 seconds
% 0.10/0.45 % Total memory used: 20.819 MB
% 0.10/0.45 % Net memory used: 20.153 MB
%------------------------------------------------------------------------------