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degen: small fixups and interface with ltl2tgba

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* src/tgbaalgos/degen.cc: Fixups.
* src/tgbatest/ltl2tgba.cc: Add switches to enable/disable
the options Tomáš added to degeneralize().
This commit is contained in:
Alexandre Duret-Lutz 2012-12-06 00:34:00 +01:00
parent bb1aa0ca13
commit c04951c444
2 changed files with 64 additions and 20 deletions
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33
src/tgbaalgos/degen.cc
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@ -239,6 +239,8 @@ namespace spot
degeneralize(const tgba* a, bool use_z_lvl, bool use_cust_acc_orders,
bool use_lvl_cache)
{
bool use_scc = use_lvl_cache || use_cust_acc_orders || use_z_lvl;
bdd_dict* dict = a->get_dict();
// The result (degeneralized) automaton uses numbered state.
@ -295,15 +297,13 @@ namespace spot
typedef std::map<int, state_explicit_number::transition*> tr_cache_t;
tr_cache_t tr_cache;
// State level cash
// State level cache
typedef std::map<const state*, int> lvl_cache_t;
lvl_cache_t lvl_cache;
// Compute SCCs in order to use custom acc order for each SCC
// or lvl_cache
// Compute SCCs in order to use any optimization.
scc_map m(a);
if (use_cust_acc_orders || use_lvl_cache)
if (use_cust_acc_orders || use_lvl_cache || use_z_lvl)
m.build_map();
queue_t todo;
@ -337,15 +337,15 @@ namespace spot
std::map<const state*, int>names;
names[s.first] = 1;
ds2num[s] = 10000*names[s.first] + 100*s.second + m.scc_of_state(s.first);
ds2num[s] = 10000 * names[s.first] + 100 * s.second + m.scc_of_state(s.first);
#else
ds2num[s] = 0;
#endif
todo.push_back(s);
// If use_lvl_cache is on insert initial state to level cash
// Level cash stores first encountered level for each state.
// If use_lvl_cache is on insert initial state to level cache
// Level cache stores first encountered level for each state.
// When entering an SCC first the lvl_cache is checked.
// If such state exists level from chache is used.
// If not, a new level (starting with 0) is computed.
@ -367,7 +367,7 @@ namespace spot
// Check SCC for state s
int s_scc = -1;
if (use_lvl_cache || use_cust_acc_orders)
if (use_scc)
s_scc = m.scc_of_state(s.first);
tgba_succ_iterator* i = a->succ_iter(s.first);
@ -382,8 +382,8 @@ namespace spot
// Check whether the target's SCC is accepting
bool is_scc_acc = false;
int scc = m.scc_of_state(i->current_state());
if (m.accepting(scc))
int scc = use_scc ? m.scc_of_state(i->current_state()) : -1;
if (!use_scc || m.accepting(scc))
is_scc_acc = true;
// The old level is slevel. What should be the new one?
@ -460,10 +460,11 @@ namespace spot
{
acc |= otheracc;
// If use_z_lvl is on, start with level zero 0 when swhitching SCCs
unsigned next = (!use_z_lvl || s_scc == scc)?slevel:0;
unsigned next = (!use_z_lvl || s_scc == scc) ? slevel : 0;
// If lvl_cache is used and switching SCCs, use level from cahce
if (use_lvl_cache && s_scc != scc && lvl_cache.find(d.first) != lvl_cache.end())
// If lvl_cache is used and switching SCCs, use level from cache
if (use_lvl_cache && s_scc != scc
&& lvl_cache.find(d.first) != lvl_cache.end())
{
d.second = lvl_cache[d.first];
}
@ -497,13 +498,13 @@ namespace spot
else
{
#ifdef DEGEN_DEBUG
dest = 10000*names[d.first] + 100*d.second + scc;
dest = 10000 * names[d.first] + 100 * d.second + scc;
#else
dest = ds2num.size();
#endif
ds2num[d] = dest;
todo.push_back(d);
// Insert new state to cash
// Insert new state to cache
if (use_lvl_cache && lvl_cache.find(d.first) == lvl_cache.end())
lvl_cache[d.first] = d.second;
}