----- Otter 3.0.4, August 1995 -----
The job was started by Macintosh user on a Macintosh, Mon Jun 14 13:17:05 1999
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).

formula_list(usable).
At(ahome,as0).
all x (At(ahome,x)->At(atheatre,drive(x))).
-(exists x (At(atheatre,x)&$ANSWER(x))).
end_of_list.

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

list(usable).
0 [] At(ahome,as0).
0 [] -At(ahome,x)|At(atheatre,drive(x)).
0 [] -At(atheatre,x)| -$ANSWER(x).
end_of_list.

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

This is a Horn set without equality.  The strategy will
be hyperresolution, with satellites in sos and nuclei
in usable.

   dependent: set(hyper_res).
   dependent: clear(order_hyper).

------------> process usable:
** KEPT (pick-wt=7): 1 [] -At(ahome,x)|At(atheatre,drive(x)).
** KEPT (pick-wt=3): 2 [] -At(atheatre,x)| -$ANSWER(x).

------------> process sos:
** KEPT (pick-wt=3): 3 [] At(ahome,as0).

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

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

given clause #1: (wt=3) 3 [] At(ahome,as0).

----> UNIT CONFLICT at   0.65 sec ----> 5 [binary,4.1,2.1] -$ANSWER(drive(as0)).

Length of proof is 1.  Level of proof is 1.

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

1 [] -At(ahome,x)|At(atheatre,drive(x)).
2 [] -At(atheatre,x)| -$ANSWER(x).
3 [] At(ahome,as0).
4 [hyper,3,1] At(atheatre,drive(as0)).
5 [binary,4.1,2.1] -$ANSWER(drive(as0)).

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


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          1.42          (0 hr, 0 min, 1 sec)
system CPU time        0.00          (0 hr, 0 min, 0 sec)
wall-clock time        1             (0 hr, 0 min, 1 sec)
hyper_res time         0.00
for_sub time           0.00
back_sub time          0.00
conflict time          0.55

The job finished        Mon Jun 14 13:17:06 1999