%------------------------------------------------------------------------------
% File : FindProof---0.1
% Problem : LCL006-1 : TPTP v9.3.1. Released v1.0.0.
% Transfm : none
% Format : tptp:raw
% Command : run_findproof /export/starexec/sandbox/benchmark/theBenchmark.p 300
% Computer : n013.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 02:00:39 PM UTC 2026
% Result : Unsatisfiable 5.43s 1.23s
% Output : Proof 5.43s
% Verified :
% SZS Type : Refutation
% Derivation depth : 11
% Number of leaves : 4
% Syntax : Number of formulae : 32 ( 28 unt; 0 def)
% Number of atoms : 40 ( 15 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 : 9 ( 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 : 35 ( 0 sgn 14 !; 0 ?)
% Comments :
%------------------------------------------------------------------------------
cnf(f2,axiom,
is_a_theorem(equivalent(equivalent(equivalent(X,Y),Z),equivalent(X,equivalent(Y,Z)))),
file('/export/starexec/sandbox/benchmark/theBenchmark.p',ec_5) ).
fof(f2_nnf,plain,
! [X,Y,Z] : is_a_theorem(equivalent(equivalent(equivalent(X,Y),Z),equivalent(X,equivalent(Y,Z)))),
inference(nnf_transformation,[status(thm)],[f2]) ).
fof(f2_sk,plain,
! [X,Y,Z] : is_a_theorem(equivalent(equivalent(equivalent(X,Y),Z),equivalent(X,equivalent(Y,Z)))),
inference(skolemisation,[status(esa)],[f2_nnf]) ).
cnf(c2,plain,
is_a_theorem(equivalent(equivalent(equivalent(X0,X1),X2),equivalent(X0,equivalent(X1,X2)))),
inference(cnf_transformation,[status(esa)],[f2_sk]) ).
cnf(hi2,axiom,
is_a_theorem(equivalent(equivalent(equivalent(X0,X1),X2),equivalent(X0,equivalent(X1,X2)))) = true,
inference(equality_encoding,[status(esa)],[c2]) ).
cnf(h0,plain,
is_a_theorem(equivalent(equivalent(equivalent(b,c),a),equivalent(b,equivalent(c,a)))) = true,
inference(hyper_resolution,[status(thm)],[hi2]) ).
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(h1,plain,
is_a_theorem(equivalent(equivalent(b,c),equivalent(a,equivalent(b,equivalent(c,a))))) = true,
inference(hyper_resolution,[status(thm)],[hi0,hi2,h0]) ).
cnf(f1,axiom,
is_a_theorem(equivalent(equivalent(X,Y),equivalent(Y,X))),
file('/export/starexec/sandbox/benchmark/theBenchmark.p',ec_4) ).
fof(f1_nnf,plain,
! [X,Y] : is_a_theorem(equivalent(equivalent(X,Y),equivalent(Y,X))),
inference(nnf_transformation,[status(thm)],[f1]) ).
fof(f1_sk,plain,
! [X,Y] : is_a_theorem(equivalent(equivalent(X,Y),equivalent(Y,X))),
inference(skolemisation,[status(esa)],[f1_nnf]) ).
cnf(c1,plain,
is_a_theorem(equivalent(equivalent(X0,X1),equivalent(X1,X0))),
inference(cnf_transformation,[status(esa)],[f1_sk]) ).
cnf(hi1,axiom,
is_a_theorem(equivalent(equivalent(X0,X1),equivalent(X1,X0))) = true,
inference(equality_encoding,[status(esa)],[c1]) ).
cnf(h5,plain,
is_a_theorem(equivalent(equivalent(a,equivalent(b,equivalent(c,a))),equivalent(equivalent(a,b),equivalent(c,a)))) = true,
inference(hyper_resolution,[status(thm)],[hi0,hi1,hi2]) ).
cnf(h4,plain,
is_a_theorem(equivalent(equivalent(equivalent(a,equivalent(b,equivalent(c,a))),equivalent(equivalent(a,b),equivalent(c,a))),equivalent(equivalent(equivalent(b,c),equivalent(a,equivalent(b,equivalent(c,a)))),equivalent(equivalent(a,equivalent(b,equivalent(c,a))),equivalent(equivalent(equivalent(a,b),equivalent(c,a)),equivalent(equivalent(b,c),equivalent(a,equivalent(b,equivalent(c,a))))))))) = true,
inference(hyper_resolution,[status(thm)],[hi0,hi2,hi2]) ).
cnf(h6,plain,
is_a_theorem(equivalent(equivalent(equivalent(b,c),equivalent(a,equivalent(b,equivalent(c,a)))),equivalent(equivalent(a,equivalent(b,equivalent(c,a))),equivalent(equivalent(equivalent(a,b),equivalent(c,a)),equivalent(equivalent(b,c),equivalent(a,equivalent(b,equivalent(c,a)))))))) = true,
inference(hyper_resolution,[status(thm)],[hi0,h4,h5]) ).
cnf(h7,plain,
is_a_theorem(equivalent(equivalent(a,equivalent(b,equivalent(c,a))),equivalent(equivalent(equivalent(a,b),equivalent(c,a)),equivalent(equivalent(b,c),equivalent(a,equivalent(b,equivalent(c,a))))))) = true,
inference(hyper_resolution,[status(thm)],[hi0,h6,h1]) ).
cnf(h2,plain,
is_a_theorem(equivalent(equivalent(equivalent(equivalent(a,b),equivalent(c,a)),equivalent(b,c)),equivalent(equivalent(a,equivalent(b,equivalent(c,a))),equivalent(equivalent(equivalent(a,b),equivalent(c,a)),equivalent(equivalent(b,c),equivalent(a,equivalent(b,equivalent(c,a)))))))) = true,
inference(hyper_resolution,[status(thm)],[hi0,hi2,hi2]) ).
cnf(h3,plain,
is_a_theorem(equivalent(equivalent(equivalent(a,equivalent(b,equivalent(c,a))),equivalent(equivalent(equivalent(a,b),equivalent(c,a)),equivalent(equivalent(b,c),equivalent(a,equivalent(b,equivalent(c,a)))))),equivalent(equivalent(equivalent(a,b),equivalent(c,a)),equivalent(b,c)))) = true,
inference(hyper_resolution,[status(thm)],[hi0,hi1,h2]) ).
cnf(t3,plain,
is_a_theorem(equivalent(equivalent(equivalent(a,b),equivalent(c,a)),equivalent(b,c))) = true,
inference(hyper_resolution,[status(thm)],[hi0,h3,h7]) ).
cnf(t8,plain,
is_a_theorem(equivalent(equivalent(equivalent(a,b),equivalent(c,a)),equivalent(b,c))) = true,
inference(orient,[status(thm)],[t3]) ).
cnf(f3,negated_conjecture,
~ is_a_theorem(equivalent(equivalent(equivalent(a,b),equivalent(c,a)),equivalent(b,c))),
file('/export/starexec/sandbox/benchmark/theBenchmark.p',prove_ec_1) ).
fof(f3_nnf,plain,
~ is_a_theorem(equivalent(equivalent(equivalent(a,b),equivalent(c,a)),equivalent(b,c))),
inference(nnf_transformation,[status(thm)],[f3]) ).
fof(f3_sk,plain,
~ is_a_theorem(equivalent(equivalent(equivalent(a,b),equivalent(c,a)),equivalent(b,c))),
inference(skolemisation,[status(esa)],[f3_nnf]) ).
cnf(c3,plain,
~ is_a_theorem(equivalent(equivalent(equivalent(a,b),equivalent(c,a)),equivalent(b,c))),
inference(cnf_transformation,[status(esa)],[f3_sk]) ).
cnf(goal_0,negated_conjecture,
is_a_theorem(equivalent(equivalent(equivalent(a,b),equivalent(c,a)),equivalent(b,c))) != true,
inference(equality_encoding,[status(esa)],[c3]) ).
cnf(g0_0,plain,
true != true,
inference(rw,[status(thm)],[goal_0,t8]) ).
cnf(contradiction_0,plain,
$false,
inference(trivial_inequality_removal,[status(thm)],[g0_0]) ).
%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.00/0.03 % Problem : LCL006-1 : TPTP v9.3.1. Released v1.0.0.
% 0.00/0.04 % Command : run_findproof /export/starexec/sandbox/benchmark/theBenchmark.p 300
% 0.11/0.36 % Computer : n013.cluster.edu
% 0.11/0.36 % Model : x86_64 x86_64
% 0.11/0.36 % CPU : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz
% 0.11/0.36 % Memory : 8046.5625MB
% 0.11/0.36 % OS : Linux 6.8.0-71-generic
% 0.11/0.36 % CPULimit : 300
% 0.11/0.36 % WCLimit : 300
% 0.11/0.36 % DateTime : Wed Sep 23 21:35:05 UTC 2026
% 0.11/0.36 % CPUTime :
% 0.11/0.36 Running run_findproof /export/starexec/sandbox/benchmark/theBenchmark.p 300
% 5.43/1.23 % SZS status Unsatisfiable for /export/starexec/sandbox/benchmark/theBenchmark.p
% 5.43/1.23 % SZS output start Proof for /export/starexec/sandbox/benchmark/theBenchmark.p
% See solution above
%------------------------------------------------------------------------------