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translate: add support for -x exprop

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This helped confirming a behavior observed in #298.

* spot/twaalgos/translate.cc, spot/twaalgos/translate.hh: Add support
for -x exprop.
* bin/spot-x.cc, NEWS: Document it.
* tests/core/ltl2tgba2.test: Test it.
This commit is contained in:
Alexandre Duret-Lutz 2020-12-14 15:53:19 +01:00
parent 71f1928052
commit 142460628c
5 changed files with 44 additions and 5 deletions
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18
NEWS
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@ -135,11 +135,21 @@ New in spot 2.9.5.dev (not yet released)
automaton, but we should not waste too much space and time trying
that.
spot::translator additionally honor the following new variable:
spot::translator additionally honor the following new variables:
tls-max-states Maximum number of states of automata involved in
automata-based implication checks for formula
simplifications. Defaults to 64.
tls-max-states Maximum number of states of automata involved in
automata-based implication checks for formula
simplifications. Defaults to 64.
exprop When set, this causes the core LTL translation to
explicitly iterate over all possible valuations of
atomic propositions when considering the successors
of a BDD-encoded state, instead of discovering
possible successors by rewriting the BDD as a sum of
product. This is enabled by default for --high,
and disabled by default otherwise. When unambiguous
automata are required, this option forced and
cannot be disabled. (This feature is not new, but
was not tunable before.)
- tgba_powerset() now takes an extra optional argument to specify a
list of accepting sinks states if some are known. Doing so can