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More simplifications rules for M.

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* src/ltlvisit/reduce.cc (reduce_visitor): Add the following
implication rewriting rules:
a M (b M c) = a M c if a implies b.
a M (b R c) = a M c if a implies b.
a R (b R c) = a R c if a implies b.
a R (b M c) = b M c if b implies a.
a M (b M c) = b M c if b implies a.
The latter rule was fixed from an incorrectly copied&pasted
rule for a M (b R c) = b R c if b implies a (this is wrong).
* src/ltltest/reduccmp.test: Add more tests.
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Alexandre Duret-Lutz 2010-04-15 13:01:21 +02:00
parent 946f305f7c
commit 1a91208933
3 changed files with 56 additions and 5 deletions
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@ -1,3 +1,19 @@
2010-04-15 Alexandre Duret-Lutz <adl@lrde.epita.fr>
More simplifications rules for M.
* src/ltlvisit/reduce.cc (reduce_visitor): Add the following
implication rewriting rules:
a M (b M c) = a M c if a implies b.
a M (b R c) = a M c if a implies b.
a R (b R c) = a R c if a implies b.
a R (b M c) = b M c if b implies a.
a M (b M c) = b M c if b implies a.
The latter rule was fixed from an incorrectly copied&pasted
rule for a M (b R c) = b R c if b implies a (this is wrong).
Also remove the wrong rule for a W (b U c) = b U c if a implies b.
* src/ltltest/reduccmp.test: Add more tests.
2010-04-15 Alexandre Duret-Lutz <adl@lrde.epita.fr>
Speed up syntactic_implication() for constants.