%------------------------------------------------------------------------------
% File : FindProof---0.1
% Problem : LCL257-1 : TPTP v9.3.1. Released v2.0.0.
% Transfm : none
% Format : tptp:raw
% Command : run_findproof /export/starexec/sandbox/benchmark/theBenchmark.p 300
% 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 : Fri Sep 25 02:01:36 PM UTC 2026
% Result : Unsatisfiable 3.51s 0.81s
% Output : Proof 3.51s
% Verified :
% SZS Type : Refutation
% Derivation depth : 12
% Number of leaves : 3
% Syntax : Number of formulae : 36 ( 32 unt; 0 def)
% Number of atoms : 44 ( 23 equ)
% Maximal formula atoms : 3 ( 1 avg)
% Number of connectives : 22 ( 14 ~; 8 |; 0 &)
% ( 0 <=>; 0 =>; 0 <=; 0 <~>)
% Maximal formula depth : 6 ( 2 avg)
% Maximal term depth : 10 ( 2 avg)
% Number of predicates : 3 ( 1 usr; 1 prp; 0-2 aty)
% Number of functors : 6 ( 6 usr; 4 con; 0-4 aty)
% Number of variables : 25 ( 0 sgn 10 !; 0 ?)
% Comments :
%------------------------------------------------------------------------------
cnf(f0,axiom,
( is_a_theorem(Y)
| ~ is_a_theorem(X)
| ~ is_a_theorem(equivalent(X,Y)) ),
file('/export/starexec/sandbox/benchmark/theBenchmark.p',condensed_detachment) ).
fof(f0_nnf,plain,
! [X,Y] :
( is_a_theorem(Y)
| ~ is_a_theorem(X)
| ~ is_a_theorem(equivalent(X,Y)) ),
inference(nnf_transformation,[status(thm)],[f0]) ).
fof(f0_sk,plain,
! [X,Y] :
( is_a_theorem(Y)
| ~ is_a_theorem(X)
| ~ is_a_theorem(equivalent(X,Y)) ),
inference(skolemisation,[status(esa)],[f0_nnf]) ).
cnf(c0,plain,
( is_a_theorem(X1)
| ~ is_a_theorem(X0)
| ~ is_a_theorem(equivalent(X0,X1)) ),
inference(cnf_transformation,[status(esa)],[f0_sk]) ).
cnf(hi0,axiom,
ifeq(is_a_theorem(equivalent(X0,X1)),true,ifeq(is_a_theorem(X0),true,is_a_theorem(X1),true),true) = true,
inference(equality_encoding,[status(esa)],[c0]) ).
cnf(f1,axiom,
is_a_theorem(equivalent(equivalent(X,Y),equivalent(equivalent(Z,Y),equivalent(X,Z)))),
file('/export/starexec/sandbox/benchmark/theBenchmark.p',yql) ).
fof(f1_nnf,plain,
! [X,Y,Z] : is_a_theorem(equivalent(equivalent(X,Y),equivalent(equivalent(Z,Y),equivalent(X,Z)))),
inference(nnf_transformation,[status(thm)],[f1]) ).
fof(f1_sk,plain,
! [X,Y,Z] : is_a_theorem(equivalent(equivalent(X,Y),equivalent(equivalent(Z,Y),equivalent(X,Z)))),
inference(skolemisation,[status(esa)],[f1_nnf]) ).
cnf(c1,plain,
is_a_theorem(equivalent(equivalent(X0,X1),equivalent(equivalent(X2,X1),equivalent(X0,X2)))),
inference(cnf_transformation,[status(esa)],[f1_sk]) ).
cnf(hi1,axiom,
is_a_theorem(equivalent(equivalent(X0,X1),equivalent(equivalent(X2,X1),equivalent(X0,X2)))) = true,
inference(equality_encoding,[status(esa)],[c1]) ).
cnf(h13,plain,
is_a_theorem(equivalent(equivalent(equivalent(equivalent(equivalent(z,x),z),equivalent(z,x)),equivalent(equivalent(z,x),equivalent(equivalent(z,x),z))),equivalent(equivalent(equivalent(z,x),x),equivalent(equivalent(equivalent(z,x),z),equivalent(z,x))))) = true,
inference(hyper_resolution,[status(thm)],[hi0,hi1,hi1]) ).
cnf(h12,plain,
is_a_theorem(equivalent(equivalent(equivalent(equivalent(equivalent(equivalent(z,x),z),equivalent(z,x)),equivalent(equivalent(z,x),equivalent(equivalent(z,x),z))),equivalent(equivalent(equivalent(z,x),x),equivalent(equivalent(equivalent(z,x),z),equivalent(z,x)))),equivalent(equivalent(equivalent(equivalent(z,x),z),x),equivalent(equivalent(equivalent(equivalent(z,x),z),equivalent(z,x)),equivalent(equivalent(z,x),equivalent(equivalent(z,x),z)))))) = true,
inference(hyper_resolution,[status(thm)],[hi0,hi1,hi1]) ).
cnf(h14,plain,
is_a_theorem(equivalent(equivalent(equivalent(equivalent(z,x),z),x),equivalent(equivalent(equivalent(equivalent(z,x),z),equivalent(z,x)),equivalent(equivalent(z,x),equivalent(equivalent(z,x),z))))) = true,
inference(hyper_resolution,[status(thm)],[hi0,h12,h13]) ).
cnf(h11,plain,
is_a_theorem(equivalent(equivalent(equivalent(equivalent(equivalent(z,x),z),x),equivalent(equivalent(equivalent(equivalent(z,x),z),equivalent(z,x)),equivalent(equivalent(z,x),equivalent(equivalent(z,x),z)))),equivalent(equivalent(equivalent(z,x),equivalent(z,x)),equivalent(equivalent(equivalent(z,x),z),x)))) = true,
inference(hyper_resolution,[status(thm)],[hi0,hi1,hi1]) ).
cnf(h15,plain,
is_a_theorem(equivalent(equivalent(equivalent(z,x),equivalent(z,x)),equivalent(equivalent(equivalent(z,x),z),x))) = true,
inference(hyper_resolution,[status(thm)],[hi0,h11,h14]) ).
cnf(h9,plain,
is_a_theorem(equivalent(equivalent(x,equivalent(equivalent(y,z),equivalent(equivalent(z,x),y))),equivalent(equivalent(equivalent(z,x),z),x))) = true,
inference(hyper_resolution,[status(thm)],[hi0,hi1,hi1]) ).
cnf(h10,plain,
is_a_theorem(equivalent(equivalent(equivalent(equivalent(z,x),equivalent(z,x)),equivalent(equivalent(equivalent(z,x),z),x)),equivalent(equivalent(x,equivalent(equivalent(y,z),equivalent(equivalent(z,x),y))),equivalent(equivalent(z,x),equivalent(z,x))))) = true,
inference(hyper_resolution,[status(thm)],[hi0,hi1,h9]) ).
cnf(h16,plain,
is_a_theorem(equivalent(equivalent(x,equivalent(equivalent(y,z),equivalent(equivalent(z,x),y))),equivalent(equivalent(z,x),equivalent(z,x)))) = true,
inference(hyper_resolution,[status(thm)],[hi0,h10,h15]) ).
cnf(h5,plain,
is_a_theorem(equivalent(equivalent(equivalent(equivalent(equivalent(z,x),equivalent(x,equivalent(equivalent(y,z),equivalent(equivalent(z,x),y)))),equivalent(z,x)),equivalent(equivalent(equivalent(x,equivalent(equivalent(y,z),equivalent(equivalent(z,x),y))),equivalent(equivalent(z,x),equivalent(z,x))),equivalent(equivalent(z,x),equivalent(x,equivalent(equivalent(y,z),equivalent(equivalent(z,x),y)))))),equivalent(equivalent(equivalent(z,x),equivalent(equivalent(z,x),equivalent(z,x))),equivalent(equivalent(equivalent(z,x),equivalent(x,equivalent(equivalent(y,z),equivalent(equivalent(z,x),y)))),equivalent(z,x))))) = true,
inference(hyper_resolution,[status(thm)],[hi0,hi1,hi1]) ).
cnf(h4,plain,
is_a_theorem(equivalent(equivalent(equivalent(equivalent(equivalent(equivalent(z,x),equivalent(x,equivalent(equivalent(y,z),equivalent(equivalent(z,x),y)))),equivalent(z,x)),equivalent(equivalent(equivalent(x,equivalent(equivalent(y,z),equivalent(equivalent(z,x),y))),equivalent(equivalent(z,x),equivalent(z,x))),equivalent(equivalent(z,x),equivalent(x,equivalent(equivalent(y,z),equivalent(equivalent(z,x),y)))))),equivalent(equivalent(equivalent(z,x),equivalent(equivalent(z,x),equivalent(z,x))),equivalent(equivalent(equivalent(z,x),equivalent(x,equivalent(equivalent(y,z),equivalent(equivalent(z,x),y)))),equivalent(z,x)))),equivalent(equivalent(equivalent(equivalent(z,x),equivalent(x,equivalent(equivalent(y,z),equivalent(equivalent(z,x),y)))),equivalent(equivalent(z,x),equivalent(z,x))),equivalent(equivalent(equivalent(equivalent(z,x),equivalent(x,equivalent(equivalent(y,z),equivalent(equivalent(z,x),y)))),equivalent(z,x)),equivalent(equivalent(equivalent(x,equivalent(equivalent(y,z),equivalent(equivalent(z,x),y))),equivalent(equivalent(z,x),equivalent(z,x))),equivalent(equivalent(z,x),equivalent(x,equivalent(equivalent(y,z),equivalent(equivalent(z,x),y))))))))) = true,
inference(hyper_resolution,[status(thm)],[hi0,hi1,hi1]) ).
cnf(h6,plain,
is_a_theorem(equivalent(equivalent(equivalent(equivalent(z,x),equivalent(x,equivalent(equivalent(y,z),equivalent(equivalent(z,x),y)))),equivalent(equivalent(z,x),equivalent(z,x))),equivalent(equivalent(equivalent(equivalent(z,x),equivalent(x,equivalent(equivalent(y,z),equivalent(equivalent(z,x),y)))),equivalent(z,x)),equivalent(equivalent(equivalent(x,equivalent(equivalent(y,z),equivalent(equivalent(z,x),y))),equivalent(equivalent(z,x),equivalent(z,x))),equivalent(equivalent(z,x),equivalent(x,equivalent(equivalent(y,z),equivalent(equivalent(z,x),y)))))))) = true,
inference(hyper_resolution,[status(thm)],[hi0,h4,h5]) ).
cnf(h3,plain,
is_a_theorem(equivalent(equivalent(equivalent(equivalent(equivalent(z,x),equivalent(x,equivalent(equivalent(y,z),equivalent(equivalent(z,x),y)))),equivalent(equivalent(z,x),equivalent(z,x))),equivalent(equivalent(equivalent(equivalent(z,x),equivalent(x,equivalent(equivalent(y,z),equivalent(equivalent(z,x),y)))),equivalent(z,x)),equivalent(equivalent(equivalent(x,equivalent(equivalent(y,z),equivalent(equivalent(z,x),y))),equivalent(equivalent(z,x),equivalent(z,x))),equivalent(equivalent(z,x),equivalent(x,equivalent(equivalent(y,z),equivalent(equivalent(z,x),y))))))),equivalent(equivalent(equivalent(equivalent(x,equivalent(equivalent(y,z),equivalent(equivalent(z,x),y))),equivalent(equivalent(z,x),equivalent(z,x))),equivalent(z,x)),equivalent(equivalent(equivalent(z,x),equivalent(x,equivalent(equivalent(y,z),equivalent(equivalent(z,x),y)))),equivalent(equivalent(z,x),equivalent(z,x)))))) = true,
inference(hyper_resolution,[status(thm)],[hi0,hi1,hi1]) ).
cnf(h7,plain,
is_a_theorem(equivalent(equivalent(equivalent(equivalent(x,equivalent(equivalent(y,z),equivalent(equivalent(z,x),y))),equivalent(equivalent(z,x),equivalent(z,x))),equivalent(z,x)),equivalent(equivalent(equivalent(z,x),equivalent(x,equivalent(equivalent(y,z),equivalent(equivalent(z,x),y)))),equivalent(equivalent(z,x),equivalent(z,x))))) = true,
inference(hyper_resolution,[status(thm)],[hi0,h3,h6]) ).
cnf(h0,plain,
is_a_theorem(equivalent(equivalent(equivalent(equivalent(equivalent(x,equivalent(equivalent(y,z),equivalent(equivalent(z,x),y))),equivalent(equivalent(z,x),equivalent(z,x))),equivalent(z,x)),equivalent(equivalent(equivalent(z,x),equivalent(x,equivalent(equivalent(y,z),equivalent(equivalent(z,x),y)))),equivalent(equivalent(z,x),equivalent(z,x)))),equivalent(equivalent(equivalent(z,x),equivalent(x,equivalent(equivalent(y,z),equivalent(equivalent(z,x),y)))),equivalent(equivalent(equivalent(x,equivalent(equivalent(y,z),equivalent(equivalent(z,x),y))),equivalent(equivalent(z,x),equivalent(z,x))),equivalent(z,x))))) = true,
inference(hyper_resolution,[status(thm)],[hi0,hi1,hi1]) ).
cnf(h1,plain,
is_a_theorem(equivalent(equivalent(equivalent(equivalent(equivalent(x,equivalent(equivalent(y,z),equivalent(equivalent(z,x),y))),equivalent(equivalent(z,x),equivalent(z,x))),equivalent(x,equivalent(equivalent(y,z),equivalent(equivalent(z,x),y)))),equivalent(equivalent(equivalent(z,x),equivalent(x,equivalent(equivalent(y,z),equivalent(equivalent(z,x),y)))),equivalent(equivalent(equivalent(x,equivalent(equivalent(y,z),equivalent(equivalent(z,x),y))),equivalent(equivalent(z,x),equivalent(z,x))),equivalent(z,x)))),equivalent(equivalent(equivalent(equivalent(equivalent(x,equivalent(equivalent(y,z),equivalent(equivalent(z,x),y))),equivalent(equivalent(z,x),equivalent(z,x))),equivalent(z,x)),equivalent(equivalent(equivalent(z,x),equivalent(x,equivalent(equivalent(y,z),equivalent(equivalent(z,x),y)))),equivalent(equivalent(z,x),equivalent(z,x)))),equivalent(equivalent(equivalent(x,equivalent(equivalent(y,z),equivalent(equivalent(z,x),y))),equivalent(equivalent(z,x),equivalent(z,x))),equivalent(x,equivalent(equivalent(y,z),equivalent(equivalent(z,x),y))))))) = true,
inference(hyper_resolution,[status(thm)],[hi0,hi1,h0]) ).
cnf(h2,plain,
is_a_theorem(equivalent(equivalent(equivalent(equivalent(equivalent(x,equivalent(equivalent(y,z),equivalent(equivalent(z,x),y))),equivalent(equivalent(z,x),equivalent(z,x))),equivalent(z,x)),equivalent(equivalent(equivalent(z,x),equivalent(x,equivalent(equivalent(y,z),equivalent(equivalent(z,x),y)))),equivalent(equivalent(z,x),equivalent(z,x)))),equivalent(equivalent(equivalent(x,equivalent(equivalent(y,z),equivalent(equivalent(z,x),y))),equivalent(equivalent(z,x),equivalent(z,x))),equivalent(x,equivalent(equivalent(y,z),equivalent(equivalent(z,x),y)))))) = true,
inference(hyper_resolution,[status(thm)],[hi0,h1,hi1]) ).
cnf(h8,plain,
is_a_theorem(equivalent(equivalent(equivalent(x,equivalent(equivalent(y,z),equivalent(equivalent(z,x),y))),equivalent(equivalent(z,x),equivalent(z,x))),equivalent(x,equivalent(equivalent(y,z),equivalent(equivalent(z,x),y))))) = true,
inference(hyper_resolution,[status(thm)],[hi0,h2,h7]) ).
cnf(t2,plain,
is_a_theorem(equivalent(x,equivalent(equivalent(y,z),equivalent(equivalent(z,x),y)))) = true,
inference(hyper_resolution,[status(thm)],[hi0,h8,h16]) ).
cnf(t6,plain,
is_a_theorem(equivalent(x,equivalent(equivalent(y,z),equivalent(equivalent(z,x),y)))) = true,
inference(orient,[status(thm)],[t2]) ).
cnf(f2,negated_conjecture,
~ is_a_theorem(equivalent(x,equivalent(equivalent(y,z),equivalent(equivalent(z,x),y)))),
file('/export/starexec/sandbox/benchmark/theBenchmark.p',prove_xhn) ).
fof(f2_nnf,plain,
~ is_a_theorem(equivalent(x,equivalent(equivalent(y,z),equivalent(equivalent(z,x),y)))),
inference(nnf_transformation,[status(thm)],[f2]) ).
fof(f2_sk,plain,
~ is_a_theorem(equivalent(x,equivalent(equivalent(y,z),equivalent(equivalent(z,x),y)))),
inference(skolemisation,[status(esa)],[f2_nnf]) ).
cnf(c2,plain,
~ is_a_theorem(equivalent(x,equivalent(equivalent(y,z),equivalent(equivalent(z,x),y)))),
inference(cnf_transformation,[status(esa)],[f2_sk]) ).
cnf(goal_0,negated_conjecture,
is_a_theorem(equivalent(x,equivalent(equivalent(y,z),equivalent(equivalent(z,x),y)))) != true,
inference(equality_encoding,[status(esa)],[c2]) ).
cnf(g0_0,plain,
true != true,
inference(rw,[status(thm)],[goal_0,t6]) ).
cnf(contradiction_0,plain,
$false,
inference(trivial_inequality_removal,[status(thm)],[g0_0]) ).
%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.00/0.01 % Problem : LCL257-1 : TPTP v9.3.1. Released v2.0.0.
% 0.00/0.02 % Command : run_findproof /export/starexec/sandbox/benchmark/theBenchmark.p 300
% 0.04/0.30 % Computer : n012.cluster.edu
% 0.04/0.30 % Model : x86_64 x86_64
% 0.04/0.30 % CPU : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz
% 0.04/0.30 % Memory : 8046.5625MB
% 0.04/0.30 % OS : Linux 6.8.0-71-generic
% 0.04/0.30 % CPULimit : 300
% 0.04/0.30 % WCLimit : 300
% 0.04/0.30 % DateTime : Wed Sep 23 22:38:05 UTC 2026
% 0.04/0.30 % CPUTime :
% 0.04/0.30 Running run_findproof /export/starexec/sandbox/benchmark/theBenchmark.p 300
% 3.51/0.81 % SZS status Unsatisfiable for /export/starexec/sandbox/benchmark/theBenchmark.p
% 3.51/0.81 % SZS output start Proof for /export/starexec/sandbox/benchmark/theBenchmark.p
% See solution above
%------------------------------------------------------------------------------