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complete: add support for alternating autamata

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* spot/twaalgos/complete.cc: Do not use the initial
state as a sink if it is universal.
* tests/core/complete.test: Add a test case.
This commit is contained in:
Alexandre Duret-Lutz 2016-12-24 18:32:21 +01:00
parent f1b8d5f1d4
commit 071d819c49
2 changed files with 56 additions and 4 deletions
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9
spot/twaalgos/complete.cc
View file

@ -49,7 +49,7 @@ namespace spot
{
bool sinkable = true;
bool first = true;
acc_cond::mark_t commonacc = 0U;
acc_cond::mark_t commonacc = um.second;
for (auto& t: aut->out(i))
{
if (t.dst != i) // Not a self-loop
@ -80,11 +80,12 @@ namespace spot
unsigned t = aut->num_edges();
// If the automaton is empty, pretend that state 0 is a sink.
if (t == 0)
// If the automaton is empty, and the initial state is not
// universal, pretend this is the sink.
if (t == 0 && !aut->is_univ_dest(aut->get_init_state_number()))
sink = aut->get_init_state_number();
// Now complete all states (excluding any newly added the sink).
// Now complete all states (excluding any newly added sink).
for (unsigned i = 0; i < n; ++i)
{
bdd missingcond = bddtrue;

51
tests/core/complete.test
View file

@ -82,6 +82,27 @@ State: 1
[0] 1 {0}
[!0] 1 {0}
--END--
HOA: v1
States: 2
Start: 0
AP: 2 "a" "b"
Acceptance: 1 Fin(0)
properties: very-weak
--BODY--
State: 0
[!0 | 1] 0
[0&!1] 1&0
State: 1 {0}
[0&!1] 1
--END--
HOA: v1
States: 2
Start: 0&1
Acceptance: 1 Fin(0)
--BODY--
State: 0
State: 1 {0}
--END--
EOF
cat >expected <<EOF
@ -171,6 +192,36 @@ State: 1 {0}
[0] 1
[!0] 1
--END--
HOA: v1
States: 2
Start: 0
AP: 2 "a" "b"
acc-name: co-Buchi
Acceptance: 1 Fin(0)
properties: univ-branch trans-labels explicit-labels state-acc complete
properties: deterministic very-weak
--BODY--
State: 0
[!0 | 1] 0
[0&!1] 1&0
State: 1 {0}
[0&!1] 1
[!0 | 1] 1
--END--
HOA: v1
States: 2
Start: 0&1
AP: 0
acc-name: co-Buchi
Acceptance: 1 Fin(0)
properties: univ-branch trans-labels explicit-labels state-acc complete
properties: deterministic
--BODY--
State: 0
[t] 0
State: 1
[t] 0
--END--
EOF
run 0 autfilt -CH automaton >out