----- Otter 3.0.4, August 1995 -----
The job was started by Macintosh user on a Macintosh, Wed Feb  4 08:33:50 1998
The command was "OTTER 3.0.4".

set(auto).
   dependent: set(process_input).
   dependent: clear(print_kept).
   dependent: clear(print_new_demod).
   dependent: clear(print_back_demod).
   dependent: clear(print_back_sub).
   dependent: set(control_memory).
   dependent: assign(max_mem, 12000).
   dependent: assign(pick_given_ratio, 4).
   dependent: assign(stats_level, 1).
   dependent: assign(max_seconds, 10800).
set(propositional).
   dependent: set(sort_literals).

formula_list(usable).
-((p->q)<-> (-q-> -p)).
end_of_list.

-------> usable clausifies to:

list(usable).
0 [] -p|q.
0 [] p.
0 [] -q.
end_of_list.

SCAN INPUT: prop=1, horn=1, equality=0, symmetry=0, max_lits=2.

The clause set is propositional; the strategy will be
ordered hyperresolution with the propositional
optimizations, with satellites in sos and nuclei in usable.

   dependent: set(hyper_res).

------------> process usable:
** KEPT (pick-wt=2): 1 [] -p|q.
** KEPT (pick-wt=1): 2 [] -q.

------------> process sos:
** KEPT (pick-wt=1): 3 [] p.

======= end of input processing =======

=========== start of search ===========

given clause #1: (wt=1) 3 [] p.
.
----> UNIT CONFLICT at   0.23 sec ----> 5 [binary,4.1,2.1] $F.


-------- PROOF -------- 
Length of proof is 1.  Level of proof is 1.

---------------- PROOF ----------------

1 [] -p|q.
2 [] -q.
3 [] p.
4 [hyper,3,1] q.
5 [binary,4.1,2.1] $F.

------------ end of proof -------------


Search stopped by max_proofs option.


Search stopped by max_proofs option.

============ end of search ============

-------------- statistics -------------
clauses given                  1
clauses generated              1
clauses kept                   4
clauses forward subsumed       0
clauses back subsumed          0
Kbytes malloced               55

----------- times (seconds) -----------
user CPU time          0.75          (0 hr, 0 min, 0 sec)
system CPU time        0.00          (0 hr, 0 min, 0 sec)
wall-clock time        0             (0 hr, 0 min, 0 sec)
hyper_res time         0.00
for_sub time           0.00
back_sub time          0.00
conflict time          0.22
demod time             0.00

The job finished        Wed Feb  4 08:33:50 1998