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postproc: add simul-max and wdba-det-max options

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* NEWS, bin/spot-x.cc: Document them.
* spot/twaalgos/postproc.cc, spot/twaalgos/postproc.hh: Implement
them.
* tests/python/stutter-inv.ipynb: Adjust result.
* tests/core/minusx.test: Add test case.
This commit is contained in:
Alexandre Duret-Lutz 2020-09-15 16:57:33 +02:00
parent a814334342
commit 69c821154c
6 changed files with 125 additions and 60 deletions
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25
NEWS
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@ -79,6 +79,31 @@ New in spot 2.9.4.dev (not yet released)
- print_dot() will display states from player 1 using a diamond
shape.
- spot::postproc has two extra configuration variables that are meant
to speedup the processing of large automata.
simul-max Number of states above which simulation-based
reductions are skipped. Defaults to 512. Set to 0
to disable. This also applies to the
simulation-based optimization of the
determinization algorithm.
wdba-det-max Maximum number of additional states allowed in
intermediate steps of WDBA-minimization. If the
number of additional states reached in the
powerset construction or in the followup products
exceeds this value, WDBA-minimization is aborted.
Defaults to 4096. Set to 0 to disable. This limit
is ignored when -D used or when det-max-states is
set.
The reason for disabling simulation-based reduction above 512
states is that the current implementation uses one BDD variable
per state, and makes a number of BDD operations that is quadratic
in the number of states. Similarly, WDBA-mininimization is used
with --small in the off chance that it might produce a smaller
automaton, but we should not waste too much space and time trying
that.
Python:
- Bindings for functions related to parity games.