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Clean the as_bdd() cache after LTL simplification.

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Syntactic implication checks may use as_bdd() to compare Boolean
formulae.  By doing so, they register Boolean variables in an order
that is usially detrimental to the LTL translator.  The new,
clear_as_bdd_cache() function offers a mean to unregister these
variables, so that the LTL translator will register them again in the
a more natural way.

* src/ltlvisit/simplify.hh, src/ltlvisit/simplify.cc
(clear_as_bdd_cache): New function.
* src/tgbatest/ltl2tgba.cc, wrap/python/ajax/spot.in: Call it.
This commit is contained in:
Alexandre Duret-Lutz 2012-05-19 22:51:18 +02:00
parent 9633dd6e88
commit e5a86290cf
4 changed files with 32 additions and 0 deletions
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2
wrap/python/ajax/spot.in
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@ -391,6 +391,8 @@ if dored:
f2 = simp.simplify(f)
f.destroy()
f = f2
# This also clears the as_bdd() cache.
simp = None
# Formula manipulation only.
if output_type == 'f':