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tgba_digraph: add a set_single_acceptance_set() method.

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* src/tgba/tgbagraph.cc: New file.
* src/tgba/Makefile.am: Adjust.
* src/tgba/tgbagraph.hh (set_single_acceptance_set,
new_acc_transition): New methods.
(set_acceptance_conditions, merge_transitions): Move body
to tgbagraph.cc.
* src/tgbaalgos/complete.cc, src/tgbaalgos/degen.cc,
src/tgbaalgos/dtbasat.cc, src/tgbaalgos/dtgbacomp.cc,
src/neverparse/neverclaimparse.yy, src/dstarparse/dra2ba.cc,
src/dstarparse/nra2nba.cc: Simplify using these new methods.
This commit is contained in:
Alexandre Duret-Lutz 2014-08-13 11:37:39 +02:00
parent 5739240c0f
commit 917f70073f
10 changed files with 144 additions and 145 deletions
Download patch file Download diff file Expand all files Collapse all files

16
src/dstarparse/dra2ba.cc
View file

@ -23,7 +23,6 @@
#include "tgbaalgos/reachiter.hh"
#include "tgbaalgos/gtec/gtec.hh"
#include "tgbaalgos/sccfilter.hh"
#include "ltlast/constant.hh"
namespace spot
{
@ -239,13 +238,7 @@ namespace spot
bdd_dict* bd = a->aut->get_dict();
bd->register_all_variables_of(a->aut, out_);
out_->set_bprop(tgba_digraph::StateBasedAcc);
// Invent a new acceptance set for the degeneralized automaton.
int accvar =
bd->register_acceptance_variable(ltl::constant::true_instance(),
out_);
acc_ = bdd_ithvar(accvar);
out_->set_acceptance_conditions(acc_);
acc_ = out_->set_single_acceptance_set();
out_->new_states(num_states_ * (a->accpair_count + 1));
out_->set_init_state(a->aut->get_init_state_number());
}
@ -299,10 +292,9 @@ namespace spot
// accepting cycle.
out_->new_transition(in, out + shift, cond);
bdd acc = bddfalse;
if (l.get(i)) // In the Li set. (Löding's Fi set.)
acc = acc_;
out_->new_transition(in + shift, out + shift, cond, acc);
// Acceptance transitions are those in the Li set. (Löding's Fi set.)
out_->new_acc_transition(in + shift, out + shift, cond,
l.get(i));
}
}
}

17
src/dstarparse/nra2nba.cc
View file

@ -20,7 +20,6 @@
#include "public.hh"
#include "tgbaalgos/reachiter.hh"
#include "tgbaalgos/sccfilter.hh"
#include "ltlast/constant.hh"
namespace spot
{
@ -49,13 +48,8 @@ namespace spot
bd->register_all_variables_of(aut, out_);
// Invent a new acceptance set for the degeneralized automaton.
int accvar =
bd->register_acceptance_variable(ltl::constant::true_instance(),
out_);
out_->set_single_acceptance_set();
out_->set_bprop(tgba_digraph::StateBasedAcc);
acc_ = bdd_ithvar(accvar);
out_->set_acceptance_conditions(acc_);
out_->new_states(num_states_ * (d_->accpair_count + 1));
auto i = aut->get_init_state();
@ -104,10 +98,10 @@ namespace spot
// accepting cycle.
out_->new_transition(in, out + shift, cond);
bdd acc = bddfalse;
if (l.get(i)) // In the Li set. (Löding's Fi set.)
acc = acc_;
out_->new_transition(in + shift, out + shift, cond, acc);
// A transition is accepting if it is in the Li
// set. (Löding's Fi set.)
out_->new_acc_transition(in + shift, out + shift, cond,
l.get(i));
}
}
}
@ -116,7 +110,6 @@ namespace spot
tgba_digraph* out_;
const dstar_aut* d_;
size_t num_states_;
bdd acc_;
};
}

10
src/neverparse/neverclaimparse.yy
View file

@ -31,7 +31,6 @@
{
#include <string>
#include <cstring>
#include "ltlast/constant.hh"
#include "public.hh"
#include "tgba/formula2bdd.hh"
@ -168,7 +167,6 @@ state:
| ident_list "false" { delete $1; }
| ident_list transition_block
{
std::list<pair>::iterator it;
bdd acc = !strncmp("accept", $1->c_str(), 6) ?
result->all_acceptance_conditions() :
static_cast<const bdd>(bddfalse);
@ -304,11 +302,7 @@ namespace spot
formula_cache fcache;
tgba_digraph* result = new tgba_digraph(dict);
auto namer = result->create_namer<std::string>();
const ltl::formula* t = ltl::constant::true_instance();
bdd acc = bdd_ithvar(dict->register_acceptance_variable(t, result));
result->set_acceptance_conditions(acc);
result->set_single_acceptance_set();
result->set_bprop(tgba_digraph::SBA);
neverclaimyy::parser parser(error_list, env, result, namer, fcache);
@ -319,7 +313,7 @@ namespace spot
if (accept_all_needed && !accept_all_seen)
{
unsigned n = namer->new_state("accept_all");
result->new_transition(n, n, bddtrue, acc);
result->new_acc_transition(n, n, bddtrue);
}
accept_all_needed = false;
accept_all_seen = false;

1
src/tgba/Makefile.am
View file

@ -53,6 +53,7 @@ libtgba_la_SOURCES = \
futurecondcol.cc \
taatgba.cc \
tgba.cc \
tgbagraph.cc \
tgbakvcomplement.cc \
tgbaproduct.cc \
tgbamask.cc \

102
src/tgba/tgbagraph.cc Normal file
View file

@ -0,0 +1,102 @@
// -*- coding: utf-8 -*-
// Copyright (C) 2014 Laboratoire de Recherche et Développement de
// l'Epita.
//
// This file is part of Spot, a model checking library.
//
// Spot is free software; you can redistribute it and/or modify it
// under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 3 of the License, or
// (at your option) any later version.
//
// Spot is distributed in the hope that it will be useful, but WITHOUT
// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
// or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
// License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
#include "tgbagraph.hh"
#include "ltlast/constant.hh"
namespace spot
{
void tgba_digraph::set_acceptance_conditions(bdd all)
{
if (all_acceptance_conditions_ != bddfalse)
dict_->unregister_all_typed_variables(bdd_dict::acc, this);
bdd sup = bdd_support(all);
dict_->register_acceptance_variables(sup, this);
neg_acceptance_conditions_ = bddtrue;
while (sup != bddtrue)
{
neg_acceptance_conditions_ &= bdd_nithvar(bdd_var(sup));
sup = bdd_high(sup);
}
all_acceptance_conditions_ =
compute_all_acceptance_conditions(neg_acceptance_conditions_);
if (number_of_acceptance_conditions() == 1)
set_bprop(tgba_digraph::SingleAccSet);
else
clear_bprop(tgba_digraph::SingleAccSet);
}
bdd tgba_digraph::set_single_acceptance_set()
{
if (all_acceptance_conditions_ != bddfalse)
dict_->unregister_all_typed_variables(bdd_dict::acc, this);
set_bprop(tgba_digraph::SingleAccSet);
int accvar =
dict_->register_acceptance_variable(ltl::constant::true_instance(),
this);
bdd degen_acc = bdd_ithvar(accvar);
all_acceptance_conditions_ = degen_acc;
neg_acceptance_conditions_ = bdd_nithvar(accvar);
return degen_acc;
}
void tgba_digraph::merge_transitions()
{
for (auto& s: g_.states())
{
// Map a pair (dest state, acc) to the first transition seen
// with such characteristic.
typedef std::pair<graph_t::state, int> key_t;
std::unordered_map<key_t, graph_t::transition, pair_hash> trmap;
auto t = g_.out_iteraser(s);
while (t)
{
// Simply skip false transitions.
if (t->cond == bddfalse)
{
t.erase();
continue;
}
key_t k(t->dst, t->acc.id());
auto p = trmap.emplace(k, t.trans());
if (!p.second)
{
// A previous transitions exist for k, merge the
// condition, and schedule the transition for
// removal.
g_.trans_data(p.first->second).cond |= t->cond;
t.erase();
}
else
{
++t;
}
}
}
g_.defrag();
}
}

73
src/tgba/tgbagraph.hh
View file

@ -90,7 +90,7 @@ namespace spot
template<class Graph>
class tgba_digraph_succ_iterator: public tgba_succ_iterator
class SPOT_API tgba_digraph_succ_iterator: public tgba_succ_iterator
{
private:
typedef typename Graph::transition transition;
@ -153,7 +153,7 @@ namespace spot
};
class tgba_digraph: public tgba
class SPOT_API tgba_digraph: public tgba
{
public:
typedef digraph<tgba_graph_state, tgba_graph_trans_data> graph_t;
@ -302,24 +302,8 @@ namespace spot
return g_.trans_data(t);
}
void set_acceptance_conditions(bdd all)
{
bdd sup = bdd_support(all);
this->dict_->register_acceptance_variables(sup, this);
neg_acceptance_conditions_ = bddtrue;
while (sup != bddtrue)
{
neg_acceptance_conditions_ &= bdd_nithvar(bdd_var(sup));
sup = bdd_high(sup);
}
all_acceptance_conditions_ =
compute_all_acceptance_conditions(neg_acceptance_conditions_);
if (number_of_acceptance_conditions() == 1)
set_bprop(tgba_digraph::SingleAccSet);
else
clear_bprop(tgba_digraph::SingleAccSet);
}
void set_acceptance_conditions(bdd all);
bdd set_single_acceptance_set();
unsigned new_state()
{
@ -337,6 +321,15 @@ namespace spot
return g_.new_transition(src, dst, cond, acc);
}
unsigned new_acc_transition(unsigned src, unsigned dst,
bdd cond, bool acc = true)
{
if (acc)
return g_.new_transition(src, dst, cond, all_acceptance_conditions_);
else
return g_.new_transition(src, dst, cond);
}
auto out(unsigned src) const
SPOT_RETURN(g_.out(src));
auto out(unsigned src)
@ -378,45 +371,7 @@ namespace spot
/// Iterate over all transitions, and merge those with compatible
/// extremities and acceptance.
void merge_transitions()
{
for (auto& s: g_.states())
{
// Map a pair (dest state, acc) to the first transition seen
// with such characteristic.
typedef std::pair<graph_t::state, int> key_t;
std::unordered_map<key_t, graph_t::transition, pair_hash> trmap;
auto t = g_.out_iteraser(s);
while (t)
{
// Simply skip false transitions.
if (t->cond == bddfalse)
{
t.erase();
continue;
}
key_t k(t->dst, t->acc.id());
auto p = trmap.emplace(k, t.trans());
if (!p.second)
{
// A previous transitions exist for k, merge the
// condition, and schedule the transition for
// removal.
g_.trans_data(p.first->second).cond |= t->cond;
t.erase();
}
else
{
++t;
}
}
}
g_.defrag();
}
void merge_transitions();
protected:
unsigned bprops_ = 0;

6
src/tgbaalgos/complete.cc
View file

@ -18,7 +18,6 @@
// along with this program. If not, see <http://www.gnu.org/licenses/>.
#include "complete.hh"
#include "ltlast/constant.hh"
#include "dupexp.hh"
namespace spot
@ -33,10 +32,7 @@ namespace spot
// We cannot safely complete an automaton if it has no
// acceptance set as the added sink would become accepting.
// In this case, add an acceptance set to all transitions.
const ltl::formula* t = ltl::constant::true_instance();
int v = aut->get_dict()->register_acceptance_variable(t, aut);
allacc = bdd_ithvar(v);
aut->set_acceptance_conditions(allacc);
allacc = aut->set_single_acceptance_set();
for (auto& t: aut->transitions())
t.acc = allacc;
}

31
src/tgbaalgos/degen.cc
View file

@ -22,7 +22,6 @@
#include "tgba/tgbagraph.hh"
#include "misc/hash.hh"
#include "misc/hashfunc.hh"
#include "ltlast/constant.hh"
#include <deque>
#include <vector>
#include <algorithm>
@ -261,19 +260,13 @@ namespace spot
// The result automaton is an SBA.
auto res = new tgba_digraph(dict);
res->set_single_acceptance_set();
if (want_sba)
res->set_bprop(tgba_digraph::StateBasedAcc);
// We use the same BDD variables as the input, except for the
// acceptance.
dict->register_all_variables_of(a, res);
dict->unregister_all_typed_variables(bdd_dict::acc, res);
// Invent a new acceptance set for the degeneralized automaton.
int accvar =
dict->register_acceptance_variable(ltl::constant::true_instance(), res);
bdd degen_acc = bdd_ithvar(accvar);
res->set_acceptance_conditions(degen_acc);
// Create an order of acceptance conditions. Each entry in this
// vector correspond to an acceptance set. Each index can
@ -600,23 +593,11 @@ namespace spot
unsigned& t = tr_cache[dest * 2 + is_acc];
if (t == 0)
{
// Actually create the transition. If the source
// state is accepting, we have to put degen_acc on all
// outgoing transitions. (We are still building a
// TGBA; we only assure that it can be used as an
// SBA.)
bdd acc = bddfalse;
if (is_acc)
acc = degen_acc;
t = res->new_transition(src, dest,
i->current_condition(), acc);
}
else
{
res->trans_data(t).cond |= i->current_condition();
}
if (t == 0) // Create transition.
t = res->new_acc_transition(src, dest,
i->current_condition(), is_acc);
else // Update existing transition.
res->trans_data(t).cond |= i->current_condition();
}
tr_cache.clear();
}

20
src/tgbaalgos/dtbasat.cc
View file

@ -26,7 +26,6 @@
#include <utility>
#include "scc.hh"
#include "tgba/bddprint.hh"
#include "ltlast/constant.hh"
#include "stats.hh"
#include "misc/satsolver.hh"
#include "misc/timer.hh"
@ -673,11 +672,7 @@ namespace spot
auto autdict = aut->get_dict();
auto a = new tgba_digraph(autdict);
autdict->register_all_variables_of(aut, a);
const ltl::formula* t = ltl::constant::true_instance();
bdd acc = bdd_ithvar(autdict->register_acceptance_variable(t, a));
a->set_acceptance_conditions(acc);
bdd acc = a->set_single_acceptance_set();
a->new_states(satdict.cand_size);
unsigned last_aut_trans = -1U;
@ -710,16 +705,13 @@ namespace spot
if (seen_trans.insert(src_cond(t->second.src,
t->second.cond)).second)
{
bdd accept = bddfalse;
// Mark the transition as accepting if the source is.
if (state_based
&& acc_states.find(t->second.src) != acc_states.end())
accept = acc;
bool accept = state_based
&& acc_states.find(t->second.src) != acc_states.end();
last_aut_trans = a->new_transition(t->second.src - 1,
t->second.dst - 1,
t->second.cond,
accept);
last_aut_trans =
a->new_acc_transition(t->second.src - 1, t->second.dst - 1,
t->second.cond, accept);
last_sat_trans = &t->second;
dout << v << '\t' << t->second << "δ\n";

13
src/tgbaalgos/dtgbacomp.cc
View file

@ -18,7 +18,6 @@
// along with this program. If not, see <http://www.gnu.org/licenses/>.
#include "dtgbacomp.hh"
#include "ltlast/constant.hh"
#include "dupexp.hh"
namespace spot
@ -28,18 +27,12 @@ namespace spot
// Clone the original automaton.
tgba_digraph* res = tgba_dupexp_dfs(aut);
auto dict = res->get_dict();
bdd oldaccs = aut->all_acceptance_conditions();
bdd oldnegs = aut->neg_acceptance_conditions();
// We will modify res in place, and the resulting
// automaton will only have one acceptance set.
dict->unregister_all_typed_variables(bdd_dict::acc, res);
bdd theacc =
bdd_ithvar(dict->register_acceptance_variable
(ltl::constant::true_instance(), res));
res->set_acceptance_conditions(theacc);
res->set_single_acceptance_set();
unsigned num_acc = aut->number_of_acceptance_conditions();
unsigned n = res->num_states();
@ -48,7 +41,7 @@ namespace spot
res->new_states(num_acc * n + 1);
unsigned sink = res->num_states() - 1;
// The sink state has an accepting self-loop.
res->new_transition(sink, sink, bddtrue, theacc);
res->new_acc_transition(sink, sink, bddtrue);
for (unsigned src = 0; src < n; ++src)
{
@ -85,7 +78,7 @@ namespace spot
if (h == bddfalse)
{
// Clone the transition
res->new_transition(src + add, dst + add, cond, theacc);
res->new_acc_transition(src + add, dst + add, cond);
assert(dst + add < sink);
// Using `t' is disallowed from now on as it is a
// reference to a transition that may have been