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formula: b* is siSERE

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Since b[+] and [*0] are siSERE, b* is siSERE as well.
Suggested by Victor Khomenko.

* spot/tl/formula.cc: Implement that for Star and also
in the concatenation rule.
* tests/core/kind.test, tests/core/ltlfilt.test: Adjust.
This commit is contained in:
Alexandre Duret-Lutz 2019-04-26 22:14:19 +02:00
parent 38f0cfd4c0
commit 4d16c0760f
3 changed files with 6 additions and 4 deletions
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7
spot/tl/formula.cc
View file

@ -1549,7 +1549,8 @@ namespace spot
// concatenation, it means all arguments should be of the
// form b*, except one that is siSERE (i.e., a sub-formula
// that verify is_syntactic_stutter_invariant() and
// !is_boolean());
// !is_boolean()). Since b* is siSERE, that means we
// want at least s-1 operands of the form b*.
if (op_ == op::Concat)
{
unsigned sb = 0; // stared Boolean formulas seen
@ -1567,7 +1568,7 @@ namespace spot
break;
}
}
is_.syntactic_si = sb == s - 1;
is_.syntactic_si = sb >= s - 1;
}
break;
}
@ -1594,7 +1595,7 @@ namespace spot
if (max_ == unbounded())
{
is_.finite = false;
is_.syntactic_si = min_ == 1 && children[0]->is_boolean();
is_.syntactic_si = min_ <= 1 && children[0]->is_boolean();
}
else
{

2
tests/core/kind.test
View file

@ -135,7 +135,7 @@ Fa M b,&!xLPgopra
{p[+]:p[+]},&!xfPsoprla
(!p W Gp) | ({(!p[*];(p[+]:(p[*];!p[+])))[:*4][:+]}<>-> (!p W Gp)),&!xPpla
{b[+][:*0..3]},&!fPsopra
{a->c[*]},fPsopra
{a->c[*]},xfPsopra
EOF
run 0 ../kind input

1
tests/core/ltlfilt.test
View file

@ -130,6 +130,7 @@ b W GFa
a U Fb
a & (b | c)
{{!a}[*];a[+]}[]-> b
{a[*];{!a}[*];a[*]}[]-> b
{a[*];{!a}[+];a[*]}[]-> b
{a[+];{!a}[*];a[*]}[]-> b
{a[*];{!a}[*];a[+]}[]-> b