%------------------------------------------------------------------------------
% File : CSE_E---1.7
% Problem : LCL015-1 : TPTP v9.2.1. Released v1.0.0.
% Transfm : none
% Format : tptp:raw
% Command : /export/starexec/sandbox/solver/bin/lemma_parallel_prover %s --lemma-prover /export/starexec/sandbox/solver/bin/cse --final-prover /export/starexec/sandbox/solver/bin/eprover --proof-time %d --global-time-limit %d
% Computer : n020.cluster.edu
% Model : x86_64 x86_64
% CPU : Intel(R) Xeon(R) CPU E5-2620 v4 2.10GHz
% Memory : 8042.1875MB
% OS : Linux 3.10.0-693.el7.x86_64
% CPULimit : 300s
% WCLimit : 300s
% DateTime : Tue May 5 04:39:11 PM UTC 2026
% Result : Unsatisfiable 1.39s 1.77s
% Output : CNFRefutation 1.39s
% Verified :
% SZS Type : Refutation
% Derivation depth : 21
% Number of leaves : 3
% Syntax : Number of clauses : 31 ( 15 unt; 0 nHn; 17 RR)
% Number of literals : 56 ( 0 equ; 27 neg)
% Maximal clause size : 4 ( 1 avg)
% Maximal term depth : 6 ( 2 avg)
% Number of predicates : 2 ( 1 usr; 1 prp; 0-1 aty)
% Number of functors : 4 ( 4 usr; 3 con; 0-2 aty)
% Number of variables : 81 ( 0 sgn)
% Comments :
%------------------------------------------------------------------------------
cnf(condensed_detachment,axiom,
( is_a_theorem(X2)
| ~ is_a_theorem(equivalent(X1,X2))
| ~ is_a_theorem(X1) ),
file('/export/starexec/sandbox/benchmark/theBenchmark.p',condensed_detachment) ).
cnf(yrm,axiom,
is_a_theorem(equivalent(equivalent(X1,X2),equivalent(X3,equivalent(equivalent(X2,X3),X1)))),
file('/export/starexec/sandbox/benchmark/theBenchmark.p',yrm) ).
cnf(prove_wn,negated_conjecture,
~ is_a_theorem(equivalent(equivalent(a,equivalent(b,c)),equivalent(c,equivalent(a,b)))),
file('/export/starexec/sandbox/benchmark/theBenchmark.p',prove_wn) ).
cnf(c_0_3,axiom,
( is_a_theorem(X2)
| ~ is_a_theorem(equivalent(X1,X2))
| ~ is_a_theorem(X1) ),
condensed_detachment ).
cnf(c_0_4,axiom,
is_a_theorem(equivalent(equivalent(X1,X2),equivalent(X3,equivalent(equivalent(X2,X3),X1)))),
yrm ).
cnf(c_0_5,plain,
( is_a_theorem(equivalent(X1,equivalent(equivalent(X2,X1),X3)))
| ~ is_a_theorem(equivalent(X3,X2)) ),
inference(spm,[status(thm)],[c_0_3,c_0_4]) ).
cnf(c_0_6,plain,
( is_a_theorem(equivalent(equivalent(X1,X2),X3))
| ~ is_a_theorem(equivalent(X3,X1))
| ~ is_a_theorem(X2) ),
inference(spm,[status(thm)],[c_0_3,c_0_5]) ).
cnf(c_0_7,plain,
( is_a_theorem(X1)
| ~ is_a_theorem(equivalent(X2,X3))
| ~ is_a_theorem(equivalent(X1,X2))
| ~ is_a_theorem(X3) ),
inference(spm,[status(thm)],[c_0_3,c_0_6]) ).
cnf(c_0_8,plain,
( is_a_theorem(X1)
| ~ is_a_theorem(equivalent(X2,equivalent(equivalent(X3,X2),X4)))
| ~ is_a_theorem(equivalent(X1,equivalent(X4,X3))) ),
inference(spm,[status(thm)],[c_0_7,c_0_4]) ).
cnf(c_0_9,plain,
( is_a_theorem(X1)
| ~ is_a_theorem(equivalent(X1,equivalent(X2,X3)))
| ~ is_a_theorem(equivalent(X2,X3)) ),
inference(spm,[status(thm)],[c_0_8,c_0_5]) ).
cnf(c_0_10,plain,
( is_a_theorem(X1)
| ~ is_a_theorem(equivalent(equivalent(X2,X1),X3))
| ~ is_a_theorem(equivalent(X3,X2)) ),
inference(spm,[status(thm)],[c_0_9,c_0_5]) ).
cnf(c_0_11,plain,
( is_a_theorem(X1)
| ~ is_a_theorem(equivalent(equivalent(X2,equivalent(equivalent(X1,X2),X3)),X3)) ),
inference(spm,[status(thm)],[c_0_10,c_0_4]) ).
cnf(c_0_12,plain,
( is_a_theorem(equivalent(X1,X2))
| ~ is_a_theorem(equivalent(X3,equivalent(equivalent(X2,X3),X1))) ),
inference(spm,[status(thm)],[c_0_9,c_0_4]) ).
cnf(c_0_13,plain,
( is_a_theorem(X1)
| ~ is_a_theorem(equivalent(equivalent(X1,X2),X3))
| ~ is_a_theorem(equivalent(X3,X2)) ),
inference(spm,[status(thm)],[c_0_11,c_0_6]) ).
cnf(c_0_14,plain,
is_a_theorem(equivalent(equivalent(equivalent(X1,equivalent(X2,equivalent(X3,X1))),X3),X2)),
inference(spm,[status(thm)],[c_0_12,c_0_4]) ).
cnf(c_0_15,plain,
( is_a_theorem(equivalent(X1,equivalent(X2,equivalent(X3,X1))))
| ~ is_a_theorem(equivalent(X2,X3)) ),
inference(spm,[status(thm)],[c_0_13,c_0_14]) ).
cnf(c_0_16,plain,
( is_a_theorem(X1)
| ~ is_a_theorem(equivalent(X2,equivalent(X3,equivalent(X2,equivalent(X1,X3))))) ),
inference(spm,[status(thm)],[c_0_10,c_0_14]) ).
cnf(c_0_17,plain,
( is_a_theorem(equivalent(equivalent(X1,X2),X3))
| ~ is_a_theorem(equivalent(equivalent(X3,X2),X1)) ),
inference(spm,[status(thm)],[c_0_12,c_0_15]) ).
cnf(c_0_18,plain,
( is_a_theorem(X1)
| ~ is_a_theorem(equivalent(X2,equivalent(X1,X2))) ),
inference(spm,[status(thm)],[c_0_16,c_0_15]) ).
cnf(c_0_19,plain,
is_a_theorem(equivalent(equivalent(X1,X2),equivalent(X3,equivalent(X1,equivalent(X2,X3))))),
inference(spm,[status(thm)],[c_0_17,c_0_14]) ).
cnf(c_0_20,plain,
( is_a_theorem(equivalent(X1,X2))
| ~ is_a_theorem(equivalent(X2,X1)) ),
inference(spm,[status(thm)],[c_0_18,c_0_5]) ).
cnf(c_0_21,plain,
is_a_theorem(equivalent(equivalent(X1,equivalent(X2,equivalent(X3,equivalent(X1,X2)))),X3)),
inference(spm,[status(thm)],[c_0_12,c_0_19]) ).
cnf(c_0_22,plain,
is_a_theorem(equivalent(X1,equivalent(X2,equivalent(X3,equivalent(X1,equivalent(X2,X3)))))),
inference(spm,[status(thm)],[c_0_20,c_0_21]) ).
cnf(c_0_23,plain,
is_a_theorem(equivalent(equivalent(X1,equivalent(X2,equivalent(equivalent(X3,X2),X1))),X3)),
inference(spm,[status(thm)],[c_0_12,c_0_22]) ).
cnf(c_0_24,plain,
is_a_theorem(equivalent(X1,equivalent(X2,equivalent(X3,equivalent(equivalent(X1,X3),X2))))),
inference(spm,[status(thm)],[c_0_20,c_0_23]) ).
cnf(c_0_25,plain,
is_a_theorem(equivalent(equivalent(X1,equivalent(equivalent(X2,X1),equivalent(X3,X2))),X3)),
inference(spm,[status(thm)],[c_0_12,c_0_24]) ).
cnf(c_0_26,plain,
is_a_theorem(equivalent(X1,equivalent(X2,equivalent(equivalent(X3,X2),equivalent(X1,X3))))),
inference(spm,[status(thm)],[c_0_20,c_0_25]) ).
cnf(c_0_27,plain,
is_a_theorem(equivalent(equivalent(equivalent(X1,equivalent(X2,X3)),equivalent(X3,X1)),X2)),
inference(spm,[status(thm)],[c_0_12,c_0_26]) ).
cnf(c_0_28,negated_conjecture,
~ is_a_theorem(equivalent(equivalent(a,equivalent(b,c)),equivalent(c,equivalent(a,b)))),
prove_wn ).
cnf(c_0_29,plain,
is_a_theorem(equivalent(equivalent(X1,equivalent(X2,X3)),equivalent(X3,equivalent(X1,X2)))),
inference(spm,[status(thm)],[c_0_17,c_0_27]) ).
cnf(c_0_30,negated_conjecture,
$false,
inference(cn,[status(thm)],[inference(rw,[status(thm)],[c_0_28,c_0_29])]),
[proof] ).
%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.13/0.12 % Problem : LCL015-1 : TPTP v9.2.1. Released v1.0.0.
% 0.13/0.12 % Command : /export/starexec/sandbox/solver/bin/lemma_parallel_prover %s --lemma-prover /export/starexec/sandbox/solver/bin/cse --final-prover /export/starexec/sandbox/solver/bin/eprover --proof-time %d --global-time-limit %d
% 0.16/0.34 % Computer : n020.cluster.edu
% 0.16/0.34 % Model : x86_64 x86_64
% 0.16/0.34 % CPU : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz
% 0.16/0.34 % Memory : 8042.1875MB
% 0.16/0.34 % OS : Linux 3.10.0-693.el7.x86_64
% 0.16/0.34 % CPULimit : 300
% 0.16/0.34 % WCLimit : 300
% 0.16/0.34 % DateTime : Mon May 4 21:52:20 EDT 2026
% 0.16/0.34 % CPUTime :
% 0.16/0.35 % start to proof: theBenchmark
% 1.39/1.77 % Version : CSE_E---1.7
% 1.39/1.77 % Problem : theBenchmark.p
% 1.39/1.77 % SZS status Unsatisfiable for theBenchmark.p
% 1.39/1.77 % SZS output start CNFRefutation
% See solution above
% 1.39/1.78 % Total time : 1.371s
%------------------------------------------------------------------------------