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hierarchy: Add is_persistence() and make is_recurrence() use it

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* NEWS: Update.
* bin/man/spot-x.x: Add environment variable.
* spot/tl/hierarchy.cc: Implement them.
* spot/tl/hierarchy.hh: Declare them.
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Alexandre GBAGUIDI AISSE 2017-07-28 13:28:09 +02:00
parent e59274b609
commit c827f75c37
4 changed files with 208 additions and 28 deletions
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@ -99,6 +99,23 @@ in third-party tools that output incorrect HOA (e.g., declaring
the automaton with property "univ-branch" when no universal branching
is actually used)
.TP
\fBSPOT_PR_CHECK\fR
Select the default algorithm that must be used to check the persistence
or recurrence property of a formula f. The values it can take are 1
or 2. Both methods work either on f or !f thanks to the duality of
persistence and recurrence classes.
See "https://spot.lrde.epita.fr/hierarchy.html" for more details. If
it is set to:
.RS
.IP 1
It will try to check if f (or !f) is co-Büchi realizable in order to
tell if f belongs to the persistence (or the recurrence) class.
.IP 2
It checks if f (or !f) is det-Büchi realizable to tell if f belongs
to the recurrence (or the persistence) class.
.RE
.TP
\fBSPOT_SATLOG\fR
If set to a filename, the SAT-based minimization routines will append