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ltlsynt: add option --global-equivalence

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Fixes issue #529.

* spot/tl/apcollect.hh,
spot/tl/apcollect.cc (collect_equivalent_literals): New function.
* python/spot/impl.i: Adjust.
* spot/tl/formula.hh,
spot/tl/formula.cc (formula_ptr_less_than_bool_first): New comparison
function.
* spot/twaalgos/aiger.hh, spot/twaalgos/aiger.cc: Adjust to deal
with equivalent assignments.
* bin/ltlsynt.cc: Implement the new option.
* tests/core/ltlsynt.test: Adjust test cases.
This commit is contained in:
Alexandre Duret-Lutz 2023-10-02 14:11:45 +02:00
parent c016f561fa
commit 9bf1edd80d
10 changed files with 515 additions and 70 deletions
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18
NEWS
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@ -16,13 +16,25 @@ New in spot 2.11.6.dev (not yet released)
will replace boolean subformulas by fresh atomic propositions even
if those subformulas share atomic propositions.
- ltlsynt will no check for output atomic propositions that always
have the same polarity in the specification. When this happens,
these output APs are replaced by true or false before running the
- ltlsynt will now check for atomic propositions that always have
the same polarity in the specification. When this happens, these
output APs are replaced by true or false before running the
synthesis pipeline, and the resulting game, Mealy machine, or
Aiger circuit is eventually patched to include that constant
output. This can be disabled with --polarity=no.
- ltlsynt will now check for atomic propositions that are specified
as equivalent. When this is detected, equivalent atomic
propositions are replaced by one representative of their class, to
limit the number of different APs processed by the synthesis
pipeline. The resulting game, Mealy machine, or Aiger circuit is
eventually patched to include the removed APs. This optimization
can be disabled with --global-equivalence=no. As an exception, an
equivalence between input and output signals (such as G(in<->out))
will be ignored if ltlsynt is configured to output a game (because
patching the game a posteriori is cumbersome if the equivalence
concerns different players).
Library:
- The following new trivial simplifications have been implemented for SEREs: