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Improve simplification of expr[*0..1]

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Fixes #108.

* spot/tl/simplify.cc: Implement the reduction.
* doc/tl/tl.tex, NEWS: Document it.
* tests/core/reduccmp.test: Test it.
This commit is contained in:
Alexandre Duret-Lutz 2017-09-02 16:35:18 +02:00
parent 190d4cfaf1
commit e8527d5ae9
4 changed files with 10 additions and 2 deletions
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NEWS
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@ -184,6 +184,10 @@ New in spot 2.3.5.dev (not yet released)
G(a & XF(b & XFc & Fd) can be simplified to G(a & Fb & Fc & Fd),
and dually F(a | XG(b | XGc | Gd)) = F(a | Gb | Gc | Gd).
When working with SERE, the simplification of "expr[*0..1]" was
improved. E.g. {{a[*]|b}[*0..1]} becomes {a[*]|b} instead of
{{a[+]|b}[*0..1]}.
- The new function spot::to_weak_alternating() is able to take an
input automaton with generalized Büchi/co-Büchi acceptance and
convert it to a weak alternating automaton.