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simplify: fix handling of keep_top_xor

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Under that option, !(a ^ b) was converted
to (!a <=> !b) instead of simply (a <=> b).

* spot/tl/simplify.cc (equiv_or_xor): Improve
rewriting.
* tests/core/ltl2tgba2.test, tests/python/simstate.py: Adjust test
cases.
This commit is contained in:
Alexandre Duret-Lutz 2020-07-22 16:23:34 +02:00
parent 2ce84f7889
commit 2c267cac40
4 changed files with 19 additions and 16 deletions
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6
tests/python/simstate.py
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@ -178,13 +178,13 @@ b.copy_state_names_from(a)
assert b.to_str() == """HOA: v1
States: 1
Start: 0
AP: 2 "p1" "p0"
AP: 2 "p0" "p1"
acc-name: Buchi
Acceptance: 1 Inf(0)
properties: trans-labels explicit-labels trans-acc complete
properties: deterministic stutter-invariant
--BODY--
State: 0 "[1,7]"
[!0] 0 {0}
[0] 0
[!1] 0 {0}
[1] 0
--END--"""