rename src/tgbaalgos/ as src/twaalgos/
Automatic mass renaming. * src/tgbaalgos/: Rename as... * src/twaalgos/: ... this. * README, configure.ac, iface/ltsmin/modelcheck.cc, src/Makefile.am, src/bin/autfilt.cc, src/bin/common_aoutput.cc, src/bin/common_aoutput.hh, src/bin/common_output.hh, src/bin/common_post.hh, src/bin/dstar2tgba.cc, src/bin/ltl2tgba.cc, src/bin/ltl2tgta.cc, src/bin/ltlcross.cc, src/bin/ltldo.cc, src/bin/ltlfilt.cc, src/bin/randaut.cc, src/dstarparse/dra2ba.cc, src/dstarparse/nra2nba.cc, src/dstarparse/nsa2tgba.cc, src/graphtest/twagraph.cc, src/kripke/kripkeprint.cc, src/ltlvisit/contain.cc, src/ltlvisit/contain.hh, src/ltlvisit/exclusive.cc, src/taalgos/emptinessta.hh, src/tgbatest/checkpsl.cc, src/tgbatest/checkta.cc, src/tgbatest/complementation.cc, src/tgbatest/emptchk.cc, src/tgbatest/ltl2tgba.cc, src/tgbatest/ltlprod.cc, src/tgbatest/randtgba.cc, src/tgbatest/taatgba.cc, src/twa/twa.cc, src/twa/twagraph.hh, src/twa/twasafracomplement.cc, wrap/python/spot_impl.i: Adjust.
This commit is contained in:
Alexandre Duret-Lutz
parent
703fbd0e99
commit
de529df59f
159 changed files with 260 additions and 272 deletions
998
src/twaalgos/dtgbasat.cc
Normal file
998
src/twaalgos/dtgbasat.cc
Normal file
|
|
@ -0,0 +1,998 @@
|
|||
// -*- coding: utf-8 -*-
|
||||
// Copyright (C) 2013, 2014, 2015 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 <iostream>
|
||||
#include <fstream>
|
||||
#include <sstream>
|
||||
#include "dtgbasat.hh"
|
||||
#include "reachiter.hh"
|
||||
#include <map>
|
||||
#include <utility>
|
||||
#include "sccinfo.hh"
|
||||
#include "twa/bddprint.hh"
|
||||
#include "ltlast/constant.hh"
|
||||
#include "stats.hh"
|
||||
#include "ltlenv/defaultenv.hh"
|
||||
#include "misc/satsolver.hh"
|
||||
#include "misc/timer.hh"
|
||||
#include "isweakscc.hh"
|
||||
#include "dotty.hh"
|
||||
|
||||
// If you set the SPOT_TMPKEEP environment variable the temporary
|
||||
// file used to communicate with the sat solver will be left in
|
||||
// the current directory.
|
||||
//
|
||||
// Additionally, if the following DEBUG macro is set to 1, the CNF
|
||||
// file will be output with a comment before each clause, and an
|
||||
// additional output file (dtgba-sat.dbg) will be created with a list
|
||||
// of all positive variables in the result and their meaning.
|
||||
|
||||
#define DEBUG 0
|
||||
#if DEBUG
|
||||
#define dout out << "c "
|
||||
#define trace std::cerr
|
||||
#else
|
||||
#define dout while (0) std::cout
|
||||
#define trace dout
|
||||
#endif
|
||||
|
||||
namespace spot
|
||||
{
|
||||
namespace
|
||||
{
|
||||
static bdd_dict_ptr debug_dict = 0;
|
||||
static const acc_cond* debug_ref_acc = 0;
|
||||
static const acc_cond* debug_cand_acc = 0;
|
||||
|
||||
struct transition
|
||||
{
|
||||
unsigned src;
|
||||
bdd cond;
|
||||
unsigned dst;
|
||||
|
||||
transition(int src, bdd cond, int dst)
|
||||
: src(src), cond(cond), dst(dst)
|
||||
{
|
||||
}
|
||||
|
||||
bool operator<(const transition& other) const
|
||||
{
|
||||
if (this->src < other.src)
|
||||
return true;
|
||||
if (this->src > other.src)
|
||||
return false;
|
||||
if (this->dst < other.dst)
|
||||
return true;
|
||||
if (this->dst > other.dst)
|
||||
return false;
|
||||
return this->cond.id() < other.cond.id();
|
||||
}
|
||||
|
||||
bool operator==(const transition& other) const
|
||||
{
|
||||
return (this->src == other.src
|
||||
&& this->dst == other.dst
|
||||
&& this->cond.id() == other.cond.id());
|
||||
}
|
||||
};
|
||||
|
||||
struct src_cond
|
||||
{
|
||||
unsigned src;
|
||||
bdd cond;
|
||||
|
||||
src_cond(int src, bdd cond)
|
||||
: src(src), cond(cond)
|
||||
{
|
||||
}
|
||||
|
||||
bool operator<(const src_cond& other) const
|
||||
{
|
||||
if (this->src < other.src)
|
||||
return true;
|
||||
if (this->src > other.src)
|
||||
return false;
|
||||
return this->cond.id() < other.cond.id();
|
||||
}
|
||||
|
||||
bool operator==(const src_cond& other) const
|
||||
{
|
||||
return (this->src == other.src
|
||||
&& this->cond.id() == other.cond.id());
|
||||
}
|
||||
};
|
||||
|
||||
struct transition_acc
|
||||
{
|
||||
unsigned src;
|
||||
bdd cond;
|
||||
acc_cond::mark_t acc;
|
||||
unsigned dst;
|
||||
|
||||
transition_acc(int src, bdd cond, acc_cond::mark_t acc, int dst)
|
||||
: src(src), cond(cond), acc(acc), dst(dst)
|
||||
{
|
||||
}
|
||||
|
||||
bool operator<(const transition_acc& other) const
|
||||
{
|
||||
if (this->src < other.src)
|
||||
return true;
|
||||
if (this->src > other.src)
|
||||
return false;
|
||||
if (this->dst < other.dst)
|
||||
return true;
|
||||
if (this->dst > other.dst)
|
||||
return false;
|
||||
if (this->cond.id() < other.cond.id())
|
||||
return true;
|
||||
if (this->cond.id() > other.cond.id())
|
||||
return false;
|
||||
return this->acc < other.acc;
|
||||
}
|
||||
|
||||
bool operator==(const transition_acc& other) const
|
||||
{
|
||||
return (this->src == other.src
|
||||
&& this->dst == other.dst
|
||||
&& this->cond.id() == other.cond.id()
|
||||
&& this->acc == other.acc);
|
||||
}
|
||||
};
|
||||
|
||||
struct path
|
||||
{
|
||||
unsigned src_cand;
|
||||
unsigned src_ref;
|
||||
unsigned dst_cand;
|
||||
unsigned dst_ref;
|
||||
acc_cond::mark_t acc_cand;
|
||||
acc_cond::mark_t acc_ref;
|
||||
|
||||
path(unsigned src_cand, unsigned src_ref)
|
||||
: src_cand(src_cand), src_ref(src_ref),
|
||||
dst_cand(src_cand), dst_ref(src_ref),
|
||||
acc_cand(0U), acc_ref(0U)
|
||||
{
|
||||
}
|
||||
|
||||
path(unsigned src_cand, unsigned src_ref,
|
||||
unsigned dst_cand, unsigned dst_ref,
|
||||
acc_cond::mark_t acc_cand, acc_cond::mark_t acc_ref)
|
||||
: src_cand(src_cand), src_ref(src_ref),
|
||||
dst_cand(dst_cand), dst_ref(dst_ref),
|
||||
acc_cand(acc_cand), acc_ref(acc_ref)
|
||||
{
|
||||
}
|
||||
|
||||
bool operator<(const path& other) const
|
||||
{
|
||||
if (this->src_cand < other.src_cand)
|
||||
return true;
|
||||
if (this->src_cand > other.src_cand)
|
||||
return false;
|
||||
if (this->src_ref < other.src_ref)
|
||||
return true;
|
||||
if (this->src_ref > other.src_ref)
|
||||
return false;
|
||||
if (this->dst_cand < other.dst_cand)
|
||||
return true;
|
||||
if (this->dst_cand > other.dst_cand)
|
||||
return false;
|
||||
if (this->dst_ref < other.dst_ref)
|
||||
return true;
|
||||
if (this->dst_ref > other.dst_ref)
|
||||
return false;
|
||||
if (this->acc_ref < other.acc_ref)
|
||||
return true;
|
||||
if (this->acc_ref > other.acc_ref)
|
||||
return false;
|
||||
if (this->acc_cand < other.acc_cand)
|
||||
return true;
|
||||
if (this->acc_cand > other.acc_cand)
|
||||
return false;
|
||||
|
||||
return false;
|
||||
}
|
||||
|
||||
};
|
||||
|
||||
std::ostream& operator<<(std::ostream& os, const transition& t)
|
||||
{
|
||||
os << '<' << t.src << ','
|
||||
<< bdd_format_formula(debug_dict, t.cond)
|
||||
<< ',' << t.dst << '>';
|
||||
return os;
|
||||
}
|
||||
|
||||
|
||||
std::ostream& operator<<(std::ostream& os, const transition_acc& t)
|
||||
{
|
||||
os << '<' << t.src << ','
|
||||
<< bdd_format_formula(debug_dict, t.cond) << ','
|
||||
<< debug_cand_acc->format(t.acc)
|
||||
<< ',' << t.dst << '>';
|
||||
return os;
|
||||
}
|
||||
|
||||
std::ostream& operator<<(std::ostream& os, const path& p)
|
||||
{
|
||||
os << '<'
|
||||
<< p.src_cand << ','
|
||||
<< p.src_ref << ','
|
||||
<< p.dst_cand << ','
|
||||
<< p.dst_ref << ", "
|
||||
<< debug_cand_acc->format(p.acc_cand) << ", "
|
||||
<< debug_ref_acc->format(p.acc_ref) << '>';
|
||||
return os;
|
||||
}
|
||||
|
||||
struct dict
|
||||
{
|
||||
dict(const const_twa_ptr& a)
|
||||
: aut(a)
|
||||
{
|
||||
}
|
||||
|
||||
const_twa_ptr aut;
|
||||
typedef std::map<transition, int> trans_map;
|
||||
typedef std::map<transition_acc, int> trans_acc_map;
|
||||
trans_map transid;
|
||||
trans_acc_map transaccid;
|
||||
typedef std::map<int, transition> rev_map;
|
||||
typedef std::map<int, transition_acc> rev_acc_map;
|
||||
rev_map revtransid;
|
||||
rev_acc_map revtransaccid;
|
||||
|
||||
std::map<path, int> pathid;
|
||||
int nvars = 0;
|
||||
//typedef std::unordered_map<const state*, int,
|
||||
//state_ptr_hash, state_ptr_equal> state_map;
|
||||
//typedef std::unordered_map<int, const state*> int_map;
|
||||
//state_map state_to_int;
|
||||
// int_map int_to_state;
|
||||
unsigned cand_size;
|
||||
unsigned int cand_nacc;
|
||||
std::vector<acc_cond::mark_t> cand_acc; // size cand_nacc
|
||||
|
||||
std::vector<acc_cond::mark_t> all_cand_acc;
|
||||
std::vector<acc_cond::mark_t> all_ref_acc;
|
||||
|
||||
std::vector<bool> is_weak_scc;
|
||||
|
||||
acc_cond cacc;
|
||||
|
||||
~dict()
|
||||
{
|
||||
aut->get_dict()->unregister_all_my_variables(this);
|
||||
}
|
||||
};
|
||||
|
||||
|
||||
unsigned declare_vars(const const_twa_graph_ptr& aut,
|
||||
dict& d, bdd ap, bool state_based, scc_info& sm)
|
||||
{
|
||||
bdd_dict_ptr bd = aut->get_dict();
|
||||
d.cand_acc.resize(d.cand_nacc);
|
||||
d.cacc.add_sets(d.cand_nacc);
|
||||
d.all_cand_acc.push_back(0U);
|
||||
for (unsigned n = 0; n < d.cand_nacc; ++n)
|
||||
{
|
||||
auto c = d.cacc.mark(n);
|
||||
d.cand_acc[n] = c;
|
||||
size_t s = d.all_cand_acc.size();
|
||||
for (size_t i = 0; i < s; ++i)
|
||||
d.all_cand_acc.push_back(d.all_cand_acc[i] | c);
|
||||
}
|
||||
|
||||
|
||||
d.all_ref_acc.push_back(0U);
|
||||
unsigned ref_nacc = aut->acc().num_sets();
|
||||
for (unsigned n = 0; n < ref_nacc; ++n)
|
||||
{
|
||||
auto c = aut->acc().mark(n);
|
||||
size_t s = d.all_ref_acc.size();
|
||||
for (size_t i = 0; i < s; ++i)
|
||||
d.all_ref_acc.push_back(d.all_ref_acc[i] | c);
|
||||
}
|
||||
|
||||
unsigned ref_size = aut->num_states();
|
||||
|
||||
if (d.cand_size == -1U)
|
||||
for (unsigned i = 0; i < ref_size; ++i)
|
||||
if (sm.reachable_state(i))
|
||||
++d.cand_size; // Note that we start from -1U the
|
||||
// cand_size is one less than the
|
||||
// number of reachable states.
|
||||
|
||||
for (unsigned i = 0; i < ref_size; ++i)
|
||||
{
|
||||
if (!sm.reachable_state(i))
|
||||
continue;
|
||||
unsigned i_scc = sm.scc_of(i);
|
||||
bool is_weak = d.is_weak_scc[i_scc];
|
||||
|
||||
for (unsigned j = 0; j < d.cand_size; ++j)
|
||||
{
|
||||
for (unsigned k = 0; k < ref_size; ++k)
|
||||
{
|
||||
if (!sm.reachable_state(k))
|
||||
continue;
|
||||
if (sm.scc_of(k) != i_scc)
|
||||
continue;
|
||||
for (unsigned l = 0; l < d.cand_size; ++l)
|
||||
{
|
||||
size_t sfp = is_weak ? 1 : d.all_ref_acc.size();
|
||||
for (size_t fp = 0; fp < sfp; ++fp)
|
||||
{
|
||||
size_t sf = d.all_cand_acc.size();
|
||||
for (size_t f = 0; f < sf; ++f)
|
||||
{
|
||||
path p(j, i, l, k,
|
||||
d.all_cand_acc[f],
|
||||
d.all_ref_acc[fp]);
|
||||
d.pathid[p] = ++d.nvars;
|
||||
}
|
||||
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
if (!state_based)
|
||||
{
|
||||
for (unsigned i = 0; i < d.cand_size; ++i)
|
||||
for (unsigned j = 0; j < d.cand_size; ++j)
|
||||
{
|
||||
bdd all = bddtrue;
|
||||
while (all != bddfalse)
|
||||
{
|
||||
bdd one = bdd_satoneset(all, ap, bddfalse);
|
||||
all -= one;
|
||||
|
||||
transition t(i, one, j);
|
||||
d.transid[t] = ++d.nvars;
|
||||
d.revtransid.emplace(d.nvars, t);
|
||||
|
||||
// Create the variable for the accepting transition
|
||||
// immediately afterwards. It helps parsing the
|
||||
// result.
|
||||
for (unsigned n = 0; n < d.cand_nacc; ++n)
|
||||
{
|
||||
transition_acc ta(i, one, d.cand_acc[n], j);
|
||||
d.transaccid[ta] = ++d.nvars;
|
||||
d.revtransaccid.emplace(d.nvars, ta);
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
else // state based
|
||||
{
|
||||
for (unsigned i = 0; i < d.cand_size; ++i)
|
||||
for (unsigned n = 0; n < d.cand_nacc; ++n)
|
||||
{
|
||||
++d.nvars;
|
||||
for (unsigned j = 1; j < d.cand_size; ++j)
|
||||
{
|
||||
bdd all = bddtrue;
|
||||
while (all != bddfalse)
|
||||
{
|
||||
bdd one = bdd_satoneset(all, ap, bddfalse);
|
||||
all -= one;
|
||||
|
||||
transition_acc ta(i, one, d.cand_acc[n], j);
|
||||
d.transaccid[ta] = d.nvars;
|
||||
d.revtransaccid.emplace(d.nvars, ta);
|
||||
}
|
||||
}
|
||||
}
|
||||
for (unsigned i = 0; i < d.cand_size; ++i)
|
||||
for (unsigned j = 0; j < d.cand_size; ++j)
|
||||
{
|
||||
bdd all = bddtrue;
|
||||
while (all != bddfalse)
|
||||
{
|
||||
bdd one = bdd_satoneset(all, ap, bddfalse);
|
||||
all -= one;
|
||||
|
||||
transition t(i, one, j);
|
||||
d.transid[t] = ++d.nvars;
|
||||
d.revtransid.emplace(d.nvars, t);
|
||||
}
|
||||
}
|
||||
}
|
||||
return ref_size;
|
||||
}
|
||||
|
||||
typedef std::pair<int, int> sat_stats;
|
||||
|
||||
static
|
||||
sat_stats dtgba_to_sat(std::ostream& out, const_twa_graph_ptr ref,
|
||||
dict& d, bool state_based)
|
||||
{
|
||||
clause_counter nclauses;
|
||||
|
||||
// Compute the AP used in the hard way.
|
||||
bdd ap = bddtrue;
|
||||
for (auto& t: ref->transitions())
|
||||
ap &= bdd_support(t.cond);
|
||||
|
||||
// Count the number of atomic propositions
|
||||
int nap = 0;
|
||||
{
|
||||
bdd cur = ap;
|
||||
while (cur != bddtrue)
|
||||
{
|
||||
++nap;
|
||||
cur = bdd_high(cur);
|
||||
}
|
||||
nap = 1 << nap;
|
||||
}
|
||||
|
||||
scc_info sm(ref);
|
||||
d.is_weak_scc = sm.weak_sccs();
|
||||
|
||||
// Number all the SAT variables we may need.
|
||||
unsigned ref_size = declare_vars(ref, d, ap, state_based, sm);
|
||||
|
||||
// empty automaton is impossible
|
||||
if (d.cand_size == 0)
|
||||
{
|
||||
out << "p cnf 1 2\n-1 0\n1 0\n";
|
||||
return std::make_pair(1, 2);
|
||||
}
|
||||
|
||||
// An empty line for the header
|
||||
out << " \n";
|
||||
|
||||
#if DEBUG
|
||||
debug_dict = ref->get_dict();
|
||||
debug_ref_acc = &ref->acc();
|
||||
debug_cand_acc = &d.cacc;
|
||||
dout << "ref_size: " << ref_size << '\n';
|
||||
dout << "cand_size: " << d.cand_size << '\n';
|
||||
#endif
|
||||
auto& racc = ref->acc();
|
||||
|
||||
dout << "symmetry-breaking clauses\n";
|
||||
int j = 0;
|
||||
bdd all = bddtrue;
|
||||
while (all != bddfalse)
|
||||
{
|
||||
bdd s = bdd_satoneset(all, ap, bddfalse);
|
||||
all -= s;
|
||||
for (unsigned i = 0; i < d.cand_size - 1; ++i)
|
||||
for (unsigned k = i * nap + j + 2; k < d.cand_size; ++k)
|
||||
{
|
||||
transition t(i, s, k);
|
||||
int ti = d.transid[t];
|
||||
dout << "¬" << t << '\n';
|
||||
out << -ti << " 0\n";
|
||||
++nclauses;
|
||||
}
|
||||
++j;
|
||||
}
|
||||
if (!nclauses.nb_clauses())
|
||||
dout << "(none)\n";
|
||||
|
||||
dout << "(8) the candidate automaton is complete\n";
|
||||
for (unsigned q1 = 0; q1 < d.cand_size; ++q1)
|
||||
{
|
||||
bdd all = bddtrue;
|
||||
while (all != bddfalse)
|
||||
{
|
||||
bdd s = bdd_satoneset(all, ap, bddfalse);
|
||||
all -= s;
|
||||
|
||||
#if DEBUG
|
||||
dout;
|
||||
for (unsigned q2 = 0; q2 < d.cand_size; ++q2)
|
||||
{
|
||||
transition t(q1, s, q2);
|
||||
out << t << "δ";
|
||||
if (q2 != d.cand_size)
|
||||
out << " ∨ ";
|
||||
}
|
||||
out << '\n';
|
||||
#endif
|
||||
|
||||
for (unsigned q2 = 0; q2 < d.cand_size; ++q2)
|
||||
{
|
||||
transition t(q1, s, q2);
|
||||
int ti = d.transid[t];
|
||||
|
||||
out << ti << ' ';
|
||||
}
|
||||
out << "0\n";
|
||||
++nclauses;
|
||||
}
|
||||
}
|
||||
|
||||
dout << "(9) the initial state is reachable\n";
|
||||
{
|
||||
unsigned init = ref->get_init_state_number();
|
||||
dout << path(0, init) << '\n';
|
||||
out << d.pathid[path(0, init)] << " 0\n";
|
||||
++nclauses;
|
||||
}
|
||||
|
||||
for (unsigned q1 = 0; q1 < d.cand_size; ++q1)
|
||||
for (unsigned q1p = 0; q1p < ref_size; ++q1p)
|
||||
{
|
||||
if (!sm.reachable_state(q1p))
|
||||
continue;
|
||||
dout << "(10) augmenting paths based on Cand[" << q1
|
||||
<< "] and Ref[" << q1p << "]\n";
|
||||
path p1(q1, q1p);
|
||||
int p1id = d.pathid[p1];
|
||||
|
||||
for (auto& tr: ref->out(q1p))
|
||||
{
|
||||
unsigned dp = tr.dst;
|
||||
bdd all = tr.cond;
|
||||
while (all != bddfalse)
|
||||
{
|
||||
bdd s = bdd_satoneset(all, ap, bddfalse);
|
||||
all -= s;
|
||||
|
||||
for (unsigned q2 = 0; q2 < d.cand_size; ++q2)
|
||||
{
|
||||
transition t(q1, s, q2);
|
||||
int ti = d.transid[t];
|
||||
|
||||
path p2(q2, dp);
|
||||
int succ = d.pathid[p2];
|
||||
|
||||
if (p1id == succ)
|
||||
continue;
|
||||
|
||||
dout << p1 << " ∧ " << t << "δ → " << p2 << '\n';
|
||||
out << -p1id << ' ' << -ti << ' ' << succ << " 0\n";
|
||||
++nclauses;
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// construction of constraints (11,12,13)
|
||||
for (unsigned q1p = 0; q1p < ref_size; ++q1p)
|
||||
{
|
||||
if (!sm.reachable_state(q1p))
|
||||
continue;
|
||||
unsigned q1p_scc = sm.scc_of(q1p);
|
||||
for (unsigned q2p = 0; q2p < ref_size; ++q2p)
|
||||
{
|
||||
if (!sm.reachable_state(q2p))
|
||||
continue;
|
||||
// We are only interested in transition that can form a
|
||||
// cycle, so they must belong to the same SCC.
|
||||
if (sm.scc_of(q2p) != q1p_scc)
|
||||
continue;
|
||||
bool is_weak = d.is_weak_scc[q1p_scc];
|
||||
bool is_acc = sm.is_accepting_scc(q1p_scc);
|
||||
|
||||
for (unsigned q1 = 0; q1 < d.cand_size; ++q1)
|
||||
for (unsigned q2 = 0; q2 < d.cand_size; ++q2)
|
||||
{
|
||||
size_t sf = d.all_cand_acc.size();
|
||||
size_t sfp = is_weak ? 1 : d.all_ref_acc.size();
|
||||
for (size_t f = 0; f < sf; ++f)
|
||||
for (size_t fp = 0; fp < sfp; ++fp)
|
||||
{
|
||||
path p(q1, q1p, q2, q2p,
|
||||
d.all_cand_acc[f], d.all_ref_acc[fp]);
|
||||
|
||||
dout << "(11&12&13) paths from " << p << '\n';
|
||||
|
||||
int pid = d.pathid[p];
|
||||
|
||||
for (auto& tr: ref->out(q2p))
|
||||
{
|
||||
unsigned dp = tr.dst;
|
||||
// Skip destinations not in the SCC.
|
||||
if (sm.scc_of(dp) != q1p_scc)
|
||||
continue;
|
||||
|
||||
for (unsigned q3 = 0; q3 < d.cand_size; ++q3)
|
||||
{
|
||||
bdd all = tr.cond;
|
||||
acc_cond::mark_t curacc = tr.acc;
|
||||
while (all != bddfalse)
|
||||
{
|
||||
bdd l = bdd_satoneset(all, ap, bddfalse);
|
||||
all -= l;
|
||||
|
||||
transition t(q2, l, q3);
|
||||
int ti = d.transid[t];
|
||||
|
||||
if (dp == q1p && q3 == q1) // (11,12) loop
|
||||
{
|
||||
if ((!is_acc) ||
|
||||
(!is_weak &&
|
||||
!racc.accepting
|
||||
(curacc | d.all_ref_acc[fp])))
|
||||
{
|
||||
#if DEBUG
|
||||
dout << "(11) " << p << " ∧ "
|
||||
<< t << "δ → ¬(";
|
||||
|
||||
bool notfirst = false;
|
||||
acc_cond::mark_t all_ =
|
||||
d.all_cand_acc.back() -
|
||||
d.all_cand_acc[f];
|
||||
for (auto m: d.cacc.sets(all_))
|
||||
{
|
||||
transition_acc
|
||||
ta(q2, l,
|
||||
d.cacc.mark(m), q1);
|
||||
if (notfirst)
|
||||
out << " ∧ ";
|
||||
else
|
||||
notfirst = true;
|
||||
out << ta << "FC";
|
||||
}
|
||||
out << ")\n";
|
||||
#endif // DEBUG
|
||||
out << -pid << ' ' << -ti;
|
||||
|
||||
// 11
|
||||
acc_cond::mark_t all_f =
|
||||
d.all_cand_acc.back() -
|
||||
d.all_cand_acc[f];
|
||||
for (auto m: d.cacc.sets(all_f))
|
||||
{
|
||||
transition_acc
|
||||
ta(q2, l,
|
||||
d.cacc.mark(m), q1);
|
||||
int tai = d.transaccid[ta];
|
||||
assert(tai != 0);
|
||||
out << ' ' << -tai;
|
||||
}
|
||||
out << " 0\n";
|
||||
++nclauses;
|
||||
}
|
||||
else
|
||||
{
|
||||
#if DEBUG
|
||||
dout << "(12) " << p << " ∧ "
|
||||
<< t << "δ → (";
|
||||
bool notfirst = false;
|
||||
// 11
|
||||
acc_cond::mark_t all_ =
|
||||
d.cacc.comp(d.all_cand_acc[f]);
|
||||
for (auto m: d.cacc.sets(all_))
|
||||
{
|
||||
transition_acc
|
||||
ta(q2, l,
|
||||
d.cacc.mark(m), q1);
|
||||
if (notfirst)
|
||||
out << " ∧ ";
|
||||
else
|
||||
notfirst = true;
|
||||
out << ta << "FC";
|
||||
}
|
||||
out << ")\n";
|
||||
#endif // DEBUG
|
||||
// 12
|
||||
acc_cond::mark_t all_f =
|
||||
d.cacc.comp(d.all_cand_acc[f]);
|
||||
for (auto m: d.cacc.sets(all_f))
|
||||
{
|
||||
transition_acc
|
||||
ta(q2, l,
|
||||
d.cacc.mark(m), q1);
|
||||
int tai = d.transaccid[ta];
|
||||
assert(tai != 0);
|
||||
|
||||
out << -pid << ' ' << -ti
|
||||
<< ' ' << tai << " 0\n";
|
||||
++nclauses;
|
||||
}
|
||||
}
|
||||
}
|
||||
// (13) augmenting paths (always).
|
||||
{
|
||||
size_t sf = d.all_cand_acc.size();
|
||||
for (size_t f = 0; f < sf; ++f)
|
||||
{
|
||||
acc_cond::mark_t f2 =
|
||||
p.acc_cand | d.all_cand_acc[f];
|
||||
acc_cond::mark_t f2p = 0U;
|
||||
if (!is_weak)
|
||||
f2p = p.acc_ref | curacc;
|
||||
|
||||
path p2(p.src_cand, p.src_ref,
|
||||
q3, dp, f2, f2p);
|
||||
int p2id = d.pathid[p2];
|
||||
if (pid == p2id)
|
||||
continue;
|
||||
#if DEBUG
|
||||
dout << "(13) " << p << " ∧ "
|
||||
<< t << "δ ";
|
||||
|
||||
auto biga_ = d.all_cand_acc[f];
|
||||
for (unsigned m = 0;
|
||||
m < d.cand_nacc; ++m)
|
||||
{
|
||||
transition_acc
|
||||
ta(q2, l,
|
||||
d.cacc.mark(m), q3);
|
||||
const char* not_ = "¬";
|
||||
if (d.cacc.has(biga_, m))
|
||||
not_ = "";
|
||||
out << " ∧ " << not_
|
||||
<< ta << "FC";
|
||||
}
|
||||
out << " → " << p2 << '\n';
|
||||
#endif
|
||||
out << -pid << ' ' << -ti << ' ';
|
||||
auto biga = d.all_cand_acc[f];
|
||||
for (unsigned m = 0;
|
||||
m < d.cand_nacc; ++m)
|
||||
{
|
||||
transition_acc
|
||||
ta(q2, l,
|
||||
d.cacc.mark(m), q3);
|
||||
int tai = d.transaccid[ta];
|
||||
if (d.cacc.has(biga, m))
|
||||
tai = -tai;
|
||||
out << tai << ' ';
|
||||
}
|
||||
|
||||
out << p2id << " 0\n";
|
||||
++nclauses;
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
out.seekp(0);
|
||||
out << "p cnf " << d.nvars << ' ' << nclauses.nb_clauses();
|
||||
return std::make_pair(d.nvars, nclauses.nb_clauses());
|
||||
}
|
||||
|
||||
static twa_graph_ptr
|
||||
sat_build(const satsolver::solution& solution, dict& satdict,
|
||||
const_twa_graph_ptr aut, bool state_based)
|
||||
{
|
||||
auto autdict = aut->get_dict();
|
||||
auto a = make_twa_graph(autdict);
|
||||
a->copy_ap_of(aut);
|
||||
a->set_generalized_buchi(satdict.cand_nacc);
|
||||
if (state_based)
|
||||
a->prop_state_based_acc();
|
||||
a->new_states(satdict.cand_size);
|
||||
|
||||
// Last transition set in the automaton.
|
||||
unsigned last_aut_trans = -1U;
|
||||
// Last transition read from the SAT result.
|
||||
const transition* last_sat_trans = nullptr;
|
||||
|
||||
#if DEBUG
|
||||
std::fstream out("dtgba-sat.dbg",
|
||||
std::ios_base::trunc | std::ios_base::out);
|
||||
out.exceptions(std::ifstream::failbit | std::ifstream::badbit);
|
||||
std::set<int> positive;
|
||||
#endif
|
||||
|
||||
dout << "--- transition variables ---\n";
|
||||
std::map<int, acc_cond::mark_t> state_acc;
|
||||
std::set<src_cond> seen_trans;
|
||||
for (int v: solution)
|
||||
{
|
||||
if (v < 0) // FIXME: maybe we can have (v < NNN)?
|
||||
continue;
|
||||
|
||||
#if DEBUG
|
||||
positive.insert(v);
|
||||
#endif
|
||||
|
||||
dict::rev_map::const_iterator t = satdict.revtransid.find(v);
|
||||
|
||||
if (t != satdict.revtransid.end())
|
||||
{
|
||||
// Skip (s,l,d2) if we have already seen some (s,l,d1).
|
||||
if (seen_trans.insert(src_cond(t->second.src,
|
||||
t->second.cond)).second)
|
||||
{
|
||||
acc_cond::mark_t acc = 0U;
|
||||
if (state_based)
|
||||
{
|
||||
auto i = state_acc.find(t->second.src);
|
||||
if (i != state_acc.end())
|
||||
acc = i->second;
|
||||
}
|
||||
|
||||
last_aut_trans = a->new_transition(t->second.src,
|
||||
t->second.dst,
|
||||
t->second.cond,
|
||||
acc);
|
||||
last_sat_trans = &t->second;
|
||||
|
||||
dout << v << '\t' << t->second << "δ\n";
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
dict::rev_acc_map::const_iterator ta;
|
||||
ta = satdict.revtransaccid.find(v);
|
||||
// This assumes that the sat solvers output variables in
|
||||
// increasing order.
|
||||
if (ta != satdict.revtransaccid.end())
|
||||
{
|
||||
dout << v << '\t' << ta->second << "F\n";
|
||||
|
||||
if (last_sat_trans &&
|
||||
ta->second.src == last_sat_trans->src &&
|
||||
ta->second.cond == last_sat_trans->cond &&
|
||||
ta->second.dst == last_sat_trans->dst)
|
||||
{
|
||||
assert(!state_based);
|
||||
auto& v = a->trans_data(last_aut_trans).acc;
|
||||
v |= ta->second.acc;
|
||||
}
|
||||
else if (state_based)
|
||||
{
|
||||
auto& v = state_acc[ta->second.src];
|
||||
v |= ta->second.acc;
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
#if DEBUG
|
||||
dout << "--- pathid variables ---\n";
|
||||
for (auto pit: satdict.pathid)
|
||||
if (positive.find(pit.second) != positive.end())
|
||||
dout << pit.second << '\t' << pit.first << "C\n";
|
||||
#endif
|
||||
|
||||
a->merge_transitions();
|
||||
|
||||
return a;
|
||||
}
|
||||
}
|
||||
|
||||
twa_graph_ptr
|
||||
dtgba_sat_synthetize(const const_twa_graph_ptr& a,
|
||||
unsigned target_acc_number,
|
||||
int target_state_number, bool state_based)
|
||||
{
|
||||
if (!a->acc().is_generalized_buchi())
|
||||
throw std::runtime_error
|
||||
("dtgba_sat() can only work with generalized Büchi acceptance");
|
||||
if (target_state_number == 0)
|
||||
return nullptr;
|
||||
trace << "dtgba_sat_synthetize(..., acc = " << target_acc_number
|
||||
<< ", states = " << target_state_number
|
||||
<< ", state_based = " << state_based << ")\n";
|
||||
|
||||
dict d(a);
|
||||
d.cand_size = target_state_number;
|
||||
d.cand_nacc = target_acc_number;
|
||||
|
||||
satsolver solver;
|
||||
satsolver::solution_pair solution;
|
||||
|
||||
timer_map t;
|
||||
t.start("encode");
|
||||
sat_stats s = dtgba_to_sat(solver(), a, d, state_based);
|
||||
t.stop("encode");
|
||||
t.start("solve");
|
||||
solution = solver.get_solution();
|
||||
t.stop("solve");
|
||||
|
||||
twa_graph_ptr res = nullptr;
|
||||
if (!solution.second.empty())
|
||||
res = sat_build(solution.second, d, a, state_based);
|
||||
|
||||
// Always copy the environment variable into a static string,
|
||||
// so that we (1) look it up once, but (2) won't crash if the
|
||||
// environment is changed.
|
||||
static std::string log = []()
|
||||
{
|
||||
auto s = getenv("SPOT_SATLOG");
|
||||
return s ? s : "";
|
||||
}();
|
||||
if (!log.empty())
|
||||
{
|
||||
std::fstream out(log,
|
||||
std::ios_base::app | std::ios_base::out);
|
||||
out.exceptions(std::ifstream::failbit | std::ifstream::badbit);
|
||||
const timer& te = t.timer("encode");
|
||||
const timer& ts = t.timer("solve");
|
||||
out << target_state_number << ',';
|
||||
if (res)
|
||||
{
|
||||
tgba_sub_statistics st = sub_stats_reachable(res);
|
||||
out << st.states << ',' << st.transitions
|
||||
<< ',' << st.sub_transitions;
|
||||
}
|
||||
else
|
||||
{
|
||||
out << ",,";
|
||||
}
|
||||
out << ','
|
||||
<< s.first << ',' << s.second << ','
|
||||
<< te.utime() << ',' << te.stime() << ','
|
||||
<< ts.utime() << ',' << ts.stime() << '\n';
|
||||
}
|
||||
static bool show = getenv("SPOT_SATSHOW");
|
||||
if (show && res)
|
||||
dotty_reachable(std::cout, res);
|
||||
|
||||
trace << "dtgba_sat_synthetize(...) = " << res << '\n';
|
||||
return res;
|
||||
}
|
||||
|
||||
twa_graph_ptr
|
||||
dtgba_sat_minimize(const const_twa_graph_ptr& a,
|
||||
unsigned target_acc_number,
|
||||
bool state_based)
|
||||
{
|
||||
int n_states = stats_reachable(a).states;
|
||||
|
||||
twa_graph_ptr prev = nullptr;
|
||||
for (;;)
|
||||
{
|
||||
auto next =
|
||||
dtgba_sat_synthetize(prev ? prev : a, target_acc_number,
|
||||
--n_states, state_based);
|
||||
if (!next)
|
||||
return prev;
|
||||
else
|
||||
n_states = stats_reachable(next).states;
|
||||
prev = next;
|
||||
}
|
||||
SPOT_UNREACHABLE();
|
||||
}
|
||||
|
||||
twa_graph_ptr
|
||||
dtgba_sat_minimize_dichotomy(const const_twa_graph_ptr& a,
|
||||
unsigned target_acc_number,
|
||||
bool state_based)
|
||||
{
|
||||
int max_states = stats_reachable(a).states - 1;
|
||||
int min_states = 1;
|
||||
|
||||
twa_graph_ptr prev = nullptr;
|
||||
while (min_states <= max_states)
|
||||
{
|
||||
int target = (max_states + min_states) / 2;
|
||||
auto next =
|
||||
dtgba_sat_synthetize(prev ? prev : a, target_acc_number, target,
|
||||
state_based);
|
||||
if (!next)
|
||||
{
|
||||
min_states = target + 1;
|
||||
}
|
||||
else
|
||||
{
|
||||
prev = next;
|
||||
max_states = stats_reachable(next).states - 1;
|
||||
}
|
||||
}
|
||||
return prev;
|
||||
}
|
||||
|
||||
}
|
||||
Loading…
Add table
Add a link
Reference in a new issue