%------------------------------------------------------------------------------
% File : Prover9---2026-6A
% Problem : SYN073+1 : TPTP v9.3.1. Released v2.0.0.
% Transfm : none
% Format : tptp:raw
% Command : prover9 -casc 300 -f /export/starexec/sandbox2/benchmark/theBenchmark.p
% Computer : n004.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 : Sun Sep 27 09:36:58 AM UTC 2026
% Result : Theorem 0.09s 0.38s
% Output : CNFRefutation 0.09s
% Verified :
% SZS Type : Refutation
% Derivation depth : 7
% Number of leaves : 1
% Syntax : Number of formulae : 9 ( 3 unt; 0 def)
% Number of atoms : 20 ( 0 equ)
% Maximal formula atoms : 3 ( 2 avg)
% Number of connectives : 16 ( 5 ~; 6 |; 3 &)
% ( 0 <=>; 2 =>; 0 <=; 0 <~>)
% Maximal formula depth : 6 ( 4 avg)
% Maximal term depth : 2 ( 1 avg)
% Number of predicates : 2 ( 1 usr; 1 prp; 0-2 aty)
% Number of functors : 2 ( 2 usr; 1 con; 0-1 aty)
% Number of variables : 22 ( 2 sgn 15 !; 3 ?)
% Comments :
%------------------------------------------------------------------------------
fof(pel50,conjecture,
( ! [X] :
( ! [Y] : big_f(X,Y)
| big_f(a,X) )
=> ? [X1] :
! [Y1] : big_f(X1,Y1) ),
file('theBenchmark.p',pel50) ).
fof(pel50_neg,negated_conjecture,
~ ( ! [X] :
( ! [Y] : big_f(X,Y)
| big_f(a,X) )
=> ? [X1] :
! [Y1] : big_f(X1,Y1) ),
inference(assume_negation,[status(cth)],[pel50]) ).
fof(nnf_1,plain,
( ! [X1] :
? [Y1] : ~ big_f(X1,Y1)
& ! [X] :
( ! [Y] : big_f(X,Y)
| big_f(a,X) ) ),
inference(fof_nnf,[status(thm)],[pel50_neg]) ).
fof(sk_pel50_neg_sk,plain,
( ! [X1] : ~ big_f(X1,sK0(X1))
& ! [X] :
( ! [Y] : big_f(X,Y)
| big_f(a,X) ) ),
inference(skolemize,[status(esa),new_symbols(skolem,[sK0]),skolemize(Y1,sK0(X1))],[nnf_1]) ).
fof(sk_pel50_neg,plain,
( ! [VAR_0] : ~ big_f(VAR_0,sK0(VAR_0))
& ! [VAR_0,VAR_1] :
( big_f(VAR_0,VAR_1)
| big_f(a,VAR_0) ) ),
inference(cnf_transformation,[status(thm)],[sk_pel50_neg_sk]) ).
cnf(c_2,negated_conjecture,
( big_f(A,B)
| big_f(a,A) ),
inference(split_conjunct,[status(thm)],[sk_pel50_neg]) ).
cnf(c_3,negated_conjecture,
~ big_f(A,sK0(A)),
inference(split_conjunct,[status(thm)],[sk_pel50_neg]) ).
cnf(c_5,plain,
big_f(a,A),
inference(resolve,[status(thm)],[c_3,c_2]) ).
cnf(c_6,plain,
$false,
inference(resolve,[status(thm)],[c_5,c_3]) ).
%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.00/0.02 % Problem : SYN073+1 : TPTP v9.3.1. Released v2.0.0.
% 0.00/0.04 % Command : prover9 -casc 300 -f /export/starexec/sandbox2/benchmark/theBenchmark.p
% 0.09/0.36 % Computer : n004.cluster.edu
% 0.09/0.36 % Model : x86_64 x86_64
% 0.09/0.36 % CPU : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz
% 0.09/0.36 % Memory : 8046.5625MB
% 0.09/0.36 % OS : Linux 6.8.0-71-generic
% 0.09/0.36 % CPULimit : 300
% 0.09/0.36 % WCLimit : 300
% 0.09/0.36 % DateTime : Sat Sep 26 17:09:21 UTC 2026
% 0.09/0.36 % CPUTime :
% 0.09/0.36 % Prover9 (64) version 2026-6A, July 2026, CASC-J13.
% 0.09/0.36 % Process 2224168 was started by sandbox2 on n004,
% 0.09/0.36 % Sat Sep 26 17:09:21 2026
% 0.09/0.36 % The command was "/export/starexec/sandbox2/solver/bin/prover9 -casc 300 -f /export/starexec/sandbox2/benchmark/theBenchmark.p".
% 0.09/0.37
% 0.09/0.37 % From the command line: assign(max_seconds, 300).
% 0.09/0.38
% 0.09/0.38 % SZS status Theorem for theBenchmark
% 0.09/0.38
% 0.09/0.38 % Proof 1 at 0.00 (+ 0.00) seconds.
% 0.09/0.38 % Length of proof is 5.
% 0.09/0.38 % Level of proof is 3.
% 0.09/0.38 % Maximum clause weight is 6.000.
% 0.09/0.38 % Given clauses 2.
% 0.09/0.38
% 0.09/0.38 % SZS output start CNFRefutation for theBenchmark
% See solution above
%------------------------------------------------------------------------------