TSTP Solution File: LCL076-1 by Otter---3.3
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%------------------------------------------------------------------------------
% File : Otter---3.3
% Problem : LCL076-1 : TPTP v8.1.0. Released v1.0.0.
% Transfm : none
% Format : tptp:raw
% Command : otter-tptp-script %s
% Computer : n023.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 : Wed Jul 27 13:03:27 EDT 2022
% Result : Unsatisfiable 1.95s 2.14s
% Output : Refutation 1.95s
% Verified :
% SZS Type : Refutation
% Derivation depth : 9
% Number of leaves : 5
% Syntax : Number of clauses : 22 ( 21 unt; 0 nHn; 3 RR)
% Number of literals : 24 ( 0 equ; 3 neg)
% Maximal clause size : 3 ( 1 avg)
% Maximal term depth : 5 ( 2 avg)
% Number of predicates : 2 ( 1 usr; 1 prp; 0-1 aty)
% Number of functors : 3 ( 3 usr; 1 con; 0-2 aty)
% Number of variables : 45 ( 12 sgn)
% Comments :
%------------------------------------------------------------------------------
cnf(1,axiom,
( ~ is_a_theorem(implies(A,B))
| ~ is_a_theorem(A)
| is_a_theorem(B) ),
file('LCL076-1.p',unknown),
[] ).
cnf(2,axiom,
~ is_a_theorem(implies(a,not(not(a)))),
file('LCL076-1.p',unknown),
[] ).
cnf(3,axiom,
is_a_theorem(implies(A,implies(B,A))),
file('LCL076-1.p',unknown),
[] ).
cnf(4,axiom,
is_a_theorem(implies(implies(A,implies(B,C)),implies(implies(A,B),implies(A,C)))),
file('LCL076-1.p',unknown),
[] ).
cnf(5,axiom,
is_a_theorem(implies(implies(not(A),not(B)),implies(B,A))),
file('LCL076-1.p',unknown),
[] ).
cnf(6,plain,
is_a_theorem(implies(A,implies(B,implies(C,B)))),
inference(hyper,[status(thm)],[3,1,3]),
[iquote('hyper,3,1,3')] ).
cnf(8,plain,
is_a_theorem(implies(A,implies(implies(not(B),not(C)),implies(C,B)))),
inference(hyper,[status(thm)],[5,1,3]),
[iquote('hyper,5,1,3')] ).
cnf(11,plain,
is_a_theorem(implies(implies(implies(A,implies(B,C)),implies(A,B)),implies(implies(A,implies(B,C)),implies(A,C)))),
inference(hyper,[status(thm)],[4,1,4]),
[iquote('hyper,4,1,4')] ).
cnf(13,plain,
is_a_theorem(implies(implies(A,implies(not(B),not(C))),implies(A,implies(C,B)))),
inference(hyper,[status(thm)],[4,1,8]),
[iquote('hyper,4,1,8')] ).
cnf(16,plain,
is_a_theorem(implies(implies(A,B),implies(A,A))),
inference(hyper,[status(thm)],[4,1,3]),
[iquote('hyper,4,1,3')] ).
cnf(19,plain,
is_a_theorem(implies(A,A)),
inference(hyper,[status(thm)],[16,1,8]),
[iquote('hyper,16,1,8')] ).
cnf(20,plain,
is_a_theorem(implies(implies(implies(A,B),A),implies(implies(A,B),B))),
inference(hyper,[status(thm)],[19,1,4]),
[iquote('hyper,19,1,4')] ).
cnf(21,plain,
is_a_theorem(implies(A,implies(B,B))),
inference(hyper,[status(thm)],[19,1,3]),
[iquote('hyper,19,1,3')] ).
cnf(22,plain,
is_a_theorem(implies(A,implies(B,implies(C,C)))),
inference(hyper,[status(thm)],[21,1,3]),
[iquote('hyper,21,1,3')] ).
cnf(60,plain,
is_a_theorem(implies(implies(implies(A,implies(B,B)),C),C)),
inference(hyper,[status(thm)],[20,1,22]),
[iquote('hyper,20,1,22')] ).
cnf(66,plain,
is_a_theorem(implies(implies(implies(A,implies(B,A)),C),C)),
inference(hyper,[status(thm)],[20,1,6]),
[iquote('hyper,20,1,6')] ).
cnf(77,plain,
is_a_theorem(implies(implies(A,implies(A,B)),implies(A,B))),
inference(hyper,[status(thm)],[11,1,60]),
[iquote('hyper,11,1,60')] ).
cnf(137,plain,
is_a_theorem(implies(not(A),implies(A,B))),
inference(hyper,[status(thm)],[13,1,66]),
[iquote('hyper,13,1,66')] ).
cnf(154,plain,
is_a_theorem(implies(not(not(A)),implies(B,A))),
inference(hyper,[status(thm)],[137,1,13]),
[iquote('hyper,137,1,13')] ).
cnf(157,plain,
is_a_theorem(implies(not(not(A)),A)),
inference(hyper,[status(thm)],[154,1,77]),
[iquote('hyper,154,1,77')] ).
cnf(169,plain,
is_a_theorem(implies(A,not(not(A)))),
inference(hyper,[status(thm)],[157,1,5]),
[iquote('hyper,157,1,5')] ).
cnf(170,plain,
$false,
inference(binary,[status(thm)],[169,2]),
[iquote('binary,169.1,2.1')] ).
%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.07/0.12 % Problem : LCL076-1 : TPTP v8.1.0. Released v1.0.0.
% 0.07/0.13 % Command : otter-tptp-script %s
% 0.12/0.34 % Computer : n023.cluster.edu
% 0.12/0.34 % Model : x86_64 x86_64
% 0.12/0.34 % CPU : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz
% 0.12/0.34 % Memory : 8042.1875MB
% 0.12/0.34 % OS : Linux 3.10.0-693.el7.x86_64
% 0.12/0.34 % CPULimit : 300
% 0.12/0.34 % WCLimit : 300
% 0.12/0.34 % DateTime : Wed Jul 27 09:42:48 EDT 2022
% 0.12/0.34 % CPUTime :
% 1.95/2.14 ----- Otter 3.3f, August 2004 -----
% 1.95/2.14 The process was started by sandbox on n023.cluster.edu,
% 1.95/2.14 Wed Jul 27 09:42:48 2022
% 1.95/2.14 The command was "./otter". The process ID is 8471.
% 1.95/2.14
% 1.95/2.14 set(prolog_style_variables).
% 1.95/2.14 set(auto).
% 1.95/2.14 dependent: set(auto1).
% 1.95/2.14 dependent: set(process_input).
% 1.95/2.14 dependent: clear(print_kept).
% 1.95/2.14 dependent: clear(print_new_demod).
% 1.95/2.14 dependent: clear(print_back_demod).
% 1.95/2.14 dependent: clear(print_back_sub).
% 1.95/2.14 dependent: set(control_memory).
% 1.95/2.14 dependent: assign(max_mem, 12000).
% 1.95/2.14 dependent: assign(pick_given_ratio, 4).
% 1.95/2.14 dependent: assign(stats_level, 1).
% 1.95/2.14 dependent: assign(max_seconds, 10800).
% 1.95/2.14 clear(print_given).
% 1.95/2.14
% 1.95/2.14 list(usable).
% 1.95/2.14 0 [] -is_a_theorem(implies(X,Y))| -is_a_theorem(X)|is_a_theorem(Y).
% 1.95/2.14 0 [] is_a_theorem(implies(X,implies(Y,X))).
% 1.95/2.14 0 [] is_a_theorem(implies(implies(X,implies(Y,Z)),implies(implies(X,Y),implies(X,Z)))).
% 1.95/2.14 0 [] is_a_theorem(implies(implies(not(X),not(Y)),implies(Y,X))).
% 1.95/2.14 0 [] -is_a_theorem(implies(a,not(not(a)))).
% 1.95/2.14 end_of_list.
% 1.95/2.14
% 1.95/2.14 SCAN INPUT: prop=0, horn=1, equality=0, symmetry=0, max_lits=3.
% 1.95/2.14
% 1.95/2.14 This is a Horn set without equality. The strategy will
% 1.95/2.14 be hyperresolution, with satellites in sos and nuclei
% 1.95/2.14 in usable.
% 1.95/2.14
% 1.95/2.14 dependent: set(hyper_res).
% 1.95/2.14 dependent: clear(order_hyper).
% 1.95/2.14
% 1.95/2.14 ------------> process usable:
% 1.95/2.14 ** KEPT (pick-wt=8): 1 [] -is_a_theorem(implies(A,B))| -is_a_theorem(A)|is_a_theorem(B).
% 1.95/2.14 ** KEPT (pick-wt=6): 2 [] -is_a_theorem(implies(a,not(not(a)))).
% 1.95/2.14
% 1.95/2.14 ------------> process sos:
% 1.95/2.14 ** KEPT (pick-wt=6): 3 [] is_a_theorem(implies(A,implies(B,A))).
% 1.95/2.14 ** KEPT (pick-wt=14): 4 [] is_a_theorem(implies(implies(A,implies(B,C)),implies(implies(A,B),implies(A,C)))).
% 1.95/2.14 ** KEPT (pick-wt=10): 5 [] is_a_theorem(implies(implies(not(A),not(B)),implies(B,A))).
% 1.95/2.14
% 1.95/2.14 ======= end of input processing =======
% 1.95/2.14
% 1.95/2.14 =========== start of search ===========
% 1.95/2.14
% 1.95/2.14 -------- PROOF --------
% 1.95/2.14
% 1.95/2.14 ----> UNIT CONFLICT at 0.01 sec ----> 170 [binary,169.1,2.1] $F.
% 1.95/2.14
% 1.95/2.14 Length of proof is 16. Level of proof is 8.
% 1.95/2.14
% 1.95/2.14 ---------------- PROOF ----------------
% 1.95/2.14 % SZS status Unsatisfiable
% 1.95/2.14 % SZS output start Refutation
% See solution above
% 1.95/2.14 ------------ end of proof -------------
% 1.95/2.14
% 1.95/2.14
% 1.95/2.14 Search stopped by max_proofs option.
% 1.95/2.14
% 1.95/2.14
% 1.95/2.14 Search stopped by max_proofs option.
% 1.95/2.14
% 1.95/2.14 ============ end of search ============
% 1.95/2.14
% 1.95/2.14 -------------- statistics -------------
% 1.95/2.14 clauses given 34
% 1.95/2.14 clauses generated 876
% 1.95/2.14 clauses kept 169
% 1.95/2.14 clauses forward subsumed 712
% 1.95/2.14 clauses back subsumed 3
% 1.95/2.14 Kbytes malloced 976
% 1.95/2.14
% 1.95/2.14 ----------- times (seconds) -----------
% 1.95/2.14 user CPU time 0.01 (0 hr, 0 min, 0 sec)
% 1.95/2.14 system CPU time 0.00 (0 hr, 0 min, 0 sec)
% 1.95/2.14 wall-clock time 2 (0 hr, 0 min, 2 sec)
% 1.95/2.14
% 1.95/2.14 That finishes the proof of the theorem.
% 1.95/2.14
% 1.95/2.14 Process 8471 finished Wed Jul 27 09:42:50 2022
% 1.95/2.14 Otter interrupted
% 1.95/2.14 PROOF FOUND
%------------------------------------------------------------------------------