sat-minimize: generalize to any acceptance
This is still missing tests. * src/bin/autfilt.cc: Add a --sat-minimize option. * src/misc/optionmap.cc, src/misc/optionmap.hh: Allow passing strings. * src/twa/acc.cc, src/twa/acc.hh: Add helper functions needed by the SAT-encoder. * src/twaalgos/complete.hh: Typos. * src/twaalgos/dtbasat.hh: Adjust comment. * src/twaalgos/dtgbasat.cc, src/twaalgos/dtgbasat.hh: Generalize to take the target acceptance as input. * src/twaalgos/postproc.cc, src/tests/ltl2tgba.cc: Adjust calls. * src/twaalgos/sbacc.cc, src/twaalgos/sbacc.hh: Don't pass the pointer by reference. * src/tests/acc.cc, src/tests/acc.test: More tests for the acceptance helper function.
This commit is contained in:
Alexandre Duret-Lutz
parent
19a273929c
commit
0874980574
15 changed files with 419 additions and 147 deletions
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@ -54,7 +54,7 @@
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#include "twaalgos/stripacc.hh"
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#include "twaalgos/remfin.hh"
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#include "twaalgos/cleanacc.hh"
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#include "twaalgos/dtgbasat.hh"
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static const char argp_program_doc[] ="\
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Convert, transform, and filter Büchi automata.\v\
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@ -91,6 +91,7 @@ enum {
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OPT_REM_DEAD,
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OPT_REM_UNREACH,
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OPT_REM_FIN,
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OPT_SAT_MINIMIZE,
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OPT_SEED,
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OPT_SEP_SETS,
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OPT_SIMPLIFY_EXCLUSIVE_AP,
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@ -167,6 +168,10 @@ static const argp_option options[] =
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{ "separate-sets", OPT_SEP_SETS, 0, 0,
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"if both Inf(x) and Fin(x) appear in the acceptance condition, replace "
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"Fin(x) by a new Fin(y) and adjust the automaton", 0 },
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{ "sat-minimize", OPT_SAT_MINIMIZE, "options", OPTION_ARG_OPTIONAL,
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"minimize the automaton using a SAT solver (only work for deterministic"
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" automata)", 0 },
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/**************************************************/
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{ 0, 0, 0, 0, "Filtering options:", 6 },
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{ "are-isomorphic", OPT_ARE_ISOMORPHIC, "FILENAME", 0,
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"keep automata that are isomorphic to the automaton in FILENAME", 0 },
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@ -261,6 +266,7 @@ static bool opt_simplify_exclusive_ap = false;
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static bool opt_rem_dead = false;
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static bool opt_rem_unreach = false;
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static bool opt_sep_sets = false;
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static const char* opt_sat_minimize = nullptr;
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static int
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parse_opt(int key, char* arg, struct argp_state*)
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@ -431,6 +437,9 @@ parse_opt(int key, char* arg, struct argp_state*)
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case OPT_REM_UNREACH:
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opt_rem_unreach = true;
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break;
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case OPT_SAT_MINIMIZE:
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opt_sat_minimize = arg ? arg : "";
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break;
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case OPT_SEED:
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opt_seed = to_int(arg);
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break;
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@ -574,6 +583,13 @@ namespace
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if (opt->product)
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aut = spot::product(std::move(aut), opt->product);
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if (opt_sat_minimize)
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{
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aut = spot::sat_minimize(aut, opt_sat_minimize);
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if (!aut)
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return 0;
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}
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aut = post.run(aut, nullptr);
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if (randomize_st || randomize_tr)
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@ -1,5 +1,5 @@
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// -*- coding: utf-8 -*-
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// Copyright (C) 2008, 2013, 2014 Laboratoire de Recherche et
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// Copyright (C) 2008, 2013, 2014, 2015 Laboratoire de Recherche et
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// Développement de l'Epita (LRDE).
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// Copyright (C) 2005 Laboratoire d'Informatique de Paris 6 (LIP6),
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// département Systèmes Répartis Coopératifs (SRC), Université Pierre
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@ -84,6 +84,22 @@ namespace spot
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if (!*options)
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return name_start;
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if (*options == '\'' || *options == '"')
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{
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auto sep = *options;
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auto start = options + 1;
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do
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++options;
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while (*options && *options != sep);
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if (*options != sep)
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return start - 1;
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std::string val(start, options);
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options_str_[name] = val;
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if (*options)
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++options;
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}
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else
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{
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char* val_end;
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int val = strtol(options, &val_end, 10);
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if (val_end == options)
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@ -103,24 +119,26 @@ namespace spot
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{
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return options;
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}
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options = val_end;
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options_[name] = val;
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}
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}
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}
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return 0;
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}
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int
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option_map::get(const char* option, int def) const
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{
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std::map<std::string, int>::const_iterator it = options_.find(option);
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if (it == options_.end())
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// default value if not declared
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return def;
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else
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return it->second;
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auto it = options_.find(option);
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return (it == options_.end()) ? def : it->second;
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}
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std::string
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option_map::get_str(const char* option, std::string def) const
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{
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auto it = options_str_.find(option);
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return (it == options_str_.end()) ? def : it->second;
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}
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int
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@ -137,12 +155,19 @@ namespace spot
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return old;
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}
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std::string
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option_map::set_str(const char* option, std::string val, std::string def)
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{
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std::string old = get_str(option, def);
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options_str_[option] = val;
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return old;
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}
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void
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option_map::set(const option_map& o)
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{
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for (std::map<std::string, int>::const_iterator it = o.options_.begin();
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it != o.options_.end(); ++it)
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options_[it->first] = it->second;
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options_ = o.options_;
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options_str_ = o.options_str_;
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}
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int&
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@ -154,9 +179,10 @@ namespace spot
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std::ostream&
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operator<<(std::ostream& os, const option_map& m)
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{
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for (std::map<std::string, int>::const_iterator it = m.options_.begin();
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it != m.options_.end(); ++it)
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os << '"' << it->first << "\" = " << it->second << '\n';
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for (auto p: m.options_)
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os << '"' << p.first << "\" = " << p.second << '\n';
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for (auto p: m.options_str_)
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os << '"' << p.first << "\" = \"" << p.second << "\"\n";
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return os;
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}
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}
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@ -1,5 +1,5 @@
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// -*- coding: utf-8 -*-
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// Copyright (C) 2013 Laboratoire de Recherche et Developpement de
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// Copyright (C) 2013, 2015 Laboratoire de Recherche et Developpement de
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// l'Epita (LRDE)
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// Copyright (C) 2005 Laboratoire d'Informatique de Paris 6 (LIP6),
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// département Systèmes Répartis Coopératifs (SRC), Université Pierre
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@ -60,6 +60,13 @@ namespace spot
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/// \see operator[]()
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int get(const char* option, int def = 0) const;
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/// \brief Get the value of \a option.
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///
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/// \return The value associated to \a option if it exists,
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/// \a def otherwise.
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/// \see operator[]()
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std::string get_str(const char* option, std::string def = {}) const;
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/// \brief Get the value of \a option.
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///
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/// \return The value associated to \a option if it exists, 0 otherwise.
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@ -72,6 +79,13 @@ namespace spot
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/// or \a def otherwise.
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int set(const char* option, int val, int def = 0);
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/// \brief Set the value of a string \a option to \a val.
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///
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/// \return The previous value associated to \a option if declared,
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/// or \a def otherwise.
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std::string set_str(const char* option,
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std::string val, std::string def = {});
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/// Acquire all the settings of \a o.
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void set(const option_map& o);
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@ -84,5 +98,6 @@ namespace spot
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private:
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std::map<std::string, int> options_;
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std::map<std::string, std::string> options_str_;
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};
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}
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@ -34,6 +34,25 @@ void check(spot::acc_cond& ac, spot::acc_cond::mark_t m)
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std::cout << '\n';
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}
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void print(const std::vector<std::vector<int>>& res)
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{
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for (auto& v: res)
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{
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std::cout << '{';
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const char* comma = "";
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for (int s: v)
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{
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std::cout << comma;
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if (s < 0)
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std::cout << '!' << (-s - 1);
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else
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std::cout << s;
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comma = ", ";
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}
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std::cout << "}\n";
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}
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}
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int main()
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{
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spot::acc_cond ac(4);
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@ -128,6 +147,16 @@ int main()
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code3.append_and(ac.fin({2, 3}));
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std::cout << code3.size() << ' ' << code3 << ' ' << code3.is_dnf() << '\n';
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// code3 == (Fin(2)|Fin(3)) & (Inf(0)&Inf(1))
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// {0}
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// {1}
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// {2, 3}
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std::cout << code3 << ' ' << "{0} true\n";
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spot::acc_cond::mark_t m = 0U;
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m.set(0);
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print(code3.missing(m, true));
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std::cout << code3 << ' ' << "{0} false\n";
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print(code3.missing(m, false));
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std::cout << spot::parse_acc_code("t") << '\n';
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std::cout << spot::parse_acc_code("f") << '\n';
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@ -68,6 +68,12 @@ stripping
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2 f 1
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9 (Fin(0)|Fin(1)) | Fin(0) | Fin(2) | (Inf(0)&Inf(1)&Inf(3)) 1
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5 (Fin(2)|Fin(3)) & (Inf(0)&Inf(1)) 0
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(Fin(2)|Fin(3)) & (Inf(0)&Inf(1)) {0} true
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{1}
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{!2, !3}
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(Fin(2)|Fin(3)) & (Inf(0)&Inf(1)) {0} false
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{!1, 2}
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{!1, 3}
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t
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f
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Fin(2)
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@ -1278,8 +1278,9 @@ checked_main(int argc, char** argv)
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else if (opt_dtgbasat >= 0)
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{
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tm.start("dtgbasat");
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auto satminimized = dtgba_sat_minimize(ensure_digraph(a),
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opt_dtgbasat);
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auto satminimized = dtgba_sat_minimize
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(ensure_digraph(a), opt_dtgbasat,
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spot::acc_cond::generalized_buchi(opt_dtgbasat));
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tm.stop("dtgbasat");
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if (satminimized)
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a = satminimized;
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@ -293,18 +293,18 @@ namespace spot
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}
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}
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bool acc_cond::accepting(mark_t inf) const
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bool acc_cond::acc_code::accepting(mark_t inf) const
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{
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if (code_.empty())
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if (empty())
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return true;
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return eval(inf, &code_.back());
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return eval(inf, &back());
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}
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bool acc_cond::inf_satisfiable(mark_t inf) const
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bool acc_cond::acc_code::inf_satisfiable(mark_t inf) const
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{
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if (code_.empty())
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if (empty())
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return true;
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return inf_eval(inf, &code_.back());
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return inf_eval(inf, &back());
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}
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acc_cond::mark_t acc_cond::accepting_sets(mark_t inf) const
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@ -602,6 +602,81 @@ namespace spot
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return {true, i};
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}
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std::vector<std::vector<int>>
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acc_cond::acc_code::missing(mark_t inf, bool accepting) const
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{
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if (empty())
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{
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if (accepting)
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return {};
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else
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return {
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{}
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};
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}
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auto used = acc_cond::acc_code::used_sets();
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unsigned c = used.count();
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bdd_allocator ba;
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int base = ba.allocate_variables(c);
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assert(base == 0);
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std::vector<bdd> r;
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std::vector<unsigned> sets(c);
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bdd known = bddtrue;
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for (unsigned i = 0; r.size() < c; ++i)
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{
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if (used.has(i))
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{
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sets[base] = i;
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bdd v = bdd_ithvar(base++);
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r.push_back(v);
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if (inf.has(i))
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known &= v;
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}
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else
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{
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r.push_back(bddfalse);
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}
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}
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bdd res = to_bdd_rec(&back(), &r[0]);
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res = bdd_restrict(res, known);
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if (accepting)
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res = !res;
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if (res == bddfalse)
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return {};
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minato_isop isop(res);
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bdd cube;
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std::vector<std::vector<int>> result;
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while ((cube = isop.next()) != bddfalse)
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{
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std::vector<int> partial;
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while (cube != bddtrue)
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{
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// The acceptance set associated to this BDD variable
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int s = sets[bdd_var(cube)];
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bdd h = bdd_high(cube);
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if (h == bddfalse) // Negative variable
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{
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partial.push_back(s);
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cube = bdd_low(cube);
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}
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else // Positive variable
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{
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partial.push_back(-s - 1);
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cube = h;
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}
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}
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result.emplace_back(std::move(partial));
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}
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return result;
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}
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bool acc_cond::acc_code::is_dnf() const
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{
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if (empty() || size() == 2)
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|
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@ -674,6 +674,18 @@ namespace spot
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acc_code complement() const;
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// Return a list of acceptance marks needed to close a cycle
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// that already visit INF infinitely often, so that the cycle is
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// accepting (ACCEPTING=true) or rejecting (ACCEPTING=false).
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// Positive values describe positive set.
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// A negative value x means the set -x-1 must be absent.
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std::vector<std::vector<int>>
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missing(mark_t inf, bool accepting) const;
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bool accepting(mark_t inf) const;
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bool inf_satisfiable(mark_t inf) const;
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// Remove all the acceptance sets in rem.
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//
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// If MISSING is set, the acceptance sets are assumed to be
|
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|
|
@ -766,6 +778,14 @@ namespace spot
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(s == 2 && code_[1].op == acc_op::Inf && code_[0].mark == all_sets());
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}
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|
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static acc_code generalized_buchi(unsigned n)
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{
|
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mark_t m((1U << n) - 1);
|
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if (n == 8 * sizeof(mark_t::value_t))
|
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m = mark_t(-1U);
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return acc_code::inf(m);
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}
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|
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bool is_buchi() const
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{
|
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unsigned s = code_.size();
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|
|
@ -900,11 +920,15 @@ namespace spot
|
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return all_;
|
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}
|
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|
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bool accepting(mark_t inf) const;
|
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bool accepting(mark_t inf) const
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{
|
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return code_.accepting(inf);
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}
|
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|
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// Assume all Fin(x) in the condition a true. Would the resulting
|
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// condition (involving only Inf(y)) be satisfiable?
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bool inf_satisfiable(mark_t inf) const;
|
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bool inf_satisfiable(mark_t inf) const
|
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{
|
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return code_.inf_satisfiable(inf);
|
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}
|
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|
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mark_t accepting_sets(mark_t inf) const;
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|
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|
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|
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|
|
@ -1,5 +1,5 @@
|
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// -*- coding: utf-8 -*-
|
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// Copyright (C) 2013, 2014 Laboratoire de Recherche et Développement
|
||||
// Copyright (C) 2013, 2014, 2015 Laboratoire de Recherche et Développement
|
||||
// de l'Epita.
|
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//
|
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// This file is part of Spot, a model checking library.
|
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|
|
@ -28,7 +28,7 @@ namespace spot
|
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/// If the tgba has no acceptance set, one will be added. The
|
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/// returned value is the number of the sink state (it can be a new
|
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/// state added for completion, or an existing non-accepting state
|
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/// that has been reused as sink state because it had not outgoing
|
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/// that has been reused as sink state because it had no outgoing
|
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/// transitions apart from self-loops.)
|
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SPOT_API unsigned tgba_complete_here(twa_graph_ptr aut);
|
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|
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|
|
|
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|
|
@ -26,7 +26,7 @@ namespace spot
|
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/// \brief Attempt to synthetize an equivalent deterministic TBA
|
||||
/// with a SAT solver.
|
||||
///
|
||||
/// \param a the input TGBA. It should have only one acceptance
|
||||
/// \param a the input TGA. It should have only one acceptance
|
||||
/// set and be deterministic. I.e., it should be a deterministic TBA.
|
||||
///
|
||||
/// \param target_state_number the desired number of states wanted
|
||||
|
|
|
|||
|
|
@ -32,7 +32,13 @@
|
|||
#include "misc/satsolver.hh"
|
||||
#include "misc/timer.hh"
|
||||
#include "isweakscc.hh"
|
||||
#include "isdet.hh"
|
||||
#include "dotty.hh"
|
||||
#include "complete.hh"
|
||||
#include "misc/optionmap.hh"
|
||||
#include "dtbasat.hh"
|
||||
#include "sccfilter.hh"
|
||||
#include "sbacc.hh"
|
||||
|
||||
// If you set the SPOT_TMPKEEP environment variable the temporary
|
||||
// file used to communicate with the sat solver will be left in
|
||||
|
|
@ -269,7 +275,7 @@ namespace spot
|
|||
// int_map int_to_state;
|
||||
unsigned cand_size;
|
||||
unsigned int cand_nacc;
|
||||
std::vector<acc_cond::mark_t> cand_acc; // size cand_nacc
|
||||
acc_cond::acc_code cand_acc;
|
||||
|
||||
std::vector<acc_cond::mark_t> all_cand_acc;
|
||||
std::vector<acc_cond::mark_t> all_ref_acc;
|
||||
|
|
@ -289,13 +295,11 @@ namespace spot
|
|||
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);
|
||||
|
|
@ -376,7 +380,7 @@ namespace spot
|
|||
// result.
|
||||
for (unsigned n = 0; n < d.cand_nacc; ++n)
|
||||
{
|
||||
transition_acc ta(i, one, d.cand_acc[n], j);
|
||||
transition_acc ta(i, one, d.cacc.mark(n), j);
|
||||
d.transaccid[ta] = ++d.nvars;
|
||||
d.revtransaccid.emplace(d.nvars, ta);
|
||||
}
|
||||
|
|
@ -389,7 +393,7 @@ namespace spot
|
|||
for (unsigned n = 0; n < d.cand_nacc; ++n)
|
||||
{
|
||||
++d.nvars;
|
||||
for (unsigned j = 1; j < d.cand_size; ++j)
|
||||
for (unsigned j = 0; j < d.cand_size; ++j)
|
||||
{
|
||||
bdd all = bddtrue;
|
||||
while (all != bddfalse)
|
||||
|
|
@ -397,7 +401,7 @@ namespace spot
|
|||
bdd one = bdd_satoneset(all, ap, bddfalse);
|
||||
all -= one;
|
||||
|
||||
transition_acc ta(i, one, d.cand_acc[n], j);
|
||||
transition_acc ta(i, one, d.cacc.mark(n), j);
|
||||
d.transaccid[ta] = d.nvars;
|
||||
d.revtransaccid.emplace(d.nvars, ta);
|
||||
}
|
||||
|
|
@ -427,6 +431,9 @@ namespace spot
|
|||
sat_stats dtgba_to_sat(std::ostream& out, const_twa_graph_ptr ref,
|
||||
dict& d, bool state_based)
|
||||
{
|
||||
#if DEBUG
|
||||
debug_dict = ref->get_dict();
|
||||
#endif
|
||||
clause_counter nclauses;
|
||||
|
||||
// Compute the AP used in the hard way.
|
||||
|
|
@ -447,6 +454,7 @@ namespace spot
|
|||
}
|
||||
|
||||
scc_info sm(ref);
|
||||
sm.determine_unknown_acceptance();
|
||||
d.is_weak_scc = sm.weak_sccs();
|
||||
|
||||
// Number all the SAT variables we may need.
|
||||
|
|
@ -463,7 +471,6 @@ namespace spot
|
|||
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';
|
||||
|
|
@ -586,7 +593,7 @@ namespace spot
|
|||
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);
|
||||
bool is_rej = sm.is_rejecting_scc(q1p_scc);
|
||||
|
||||
for (unsigned q1 = 0; q1 < d.cand_size; ++q1)
|
||||
for (unsigned q2 = 0; q2 < d.cand_size; ++q2)
|
||||
|
|
@ -624,87 +631,68 @@ namespace spot
|
|||
|
||||
if (dp == q1p && q3 == q1) // (11,12) loop
|
||||
{
|
||||
if ((!is_acc) ||
|
||||
(!is_weak &&
|
||||
bool rejloop =
|
||||
(is_rej ||
|
||||
!racc.accepting
|
||||
(curacc | d.all_ref_acc[fp])))
|
||||
(curacc | d.all_ref_acc[fp]));
|
||||
|
||||
auto missing =
|
||||
d.cand_acc.
|
||||
missing(d.all_cand_acc[f],
|
||||
!rejloop);
|
||||
|
||||
for (auto& v: missing)
|
||||
{
|
||||
#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_))
|
||||
dout << (rejloop ?
|
||||
"(11) " : "(12) ")
|
||||
<< p << " ∧ "
|
||||
<< t << "δ → (";
|
||||
const char* orsep = "";
|
||||
for (int s: v)
|
||||
{
|
||||
if (s < 0)
|
||||
{
|
||||
transition_acc
|
||||
ta(q2, l,
|
||||
d.cacc.mark(m), q1);
|
||||
if (notfirst)
|
||||
out << " ∧ ";
|
||||
d.cacc.mark(-s - 1),
|
||||
q1);
|
||||
out << orsep << "¬" << ta;
|
||||
}
|
||||
else
|
||||
notfirst = true;
|
||||
out << ta << "FC";
|
||||
{
|
||||
transition_acc
|
||||
ta(q2, l,
|
||||
d.cacc.mark(s), q1);
|
||||
out << orsep << ta;
|
||||
}
|
||||
orsep = " ∨ ";
|
||||
}
|
||||
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))
|
||||
for (int s: v)
|
||||
if (s < 0)
|
||||
{
|
||||
transition_acc
|
||||
ta(q2, l,
|
||||
d.cacc.mark(m), q1);
|
||||
d.cacc.mark(-s - 1),
|
||||
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);
|
||||
d.cacc.mark(s), q1);
|
||||
int tai = d.transaccid[ta];
|
||||
assert(tai != 0);
|
||||
|
||||
out << -pid << ' ' << -ti
|
||||
<< ' ' << tai << " 0\n";
|
||||
++nclauses;
|
||||
out << ' ' << tai;
|
||||
}
|
||||
out << " 0\n";
|
||||
++nclauses;
|
||||
}
|
||||
}
|
||||
// (13) augmenting paths (always).
|
||||
|
|
@ -779,9 +767,9 @@ namespace spot
|
|||
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->set_acceptance(satdict.cand_nacc, satdict.cand_acc);
|
||||
a->new_states(satdict.cand_size);
|
||||
|
||||
// Last transition set in the automaton.
|
||||
|
|
@ -876,20 +864,20 @@ namespace spot
|
|||
twa_graph_ptr
|
||||
dtgba_sat_synthetize(const const_twa_graph_ptr& a,
|
||||
unsigned target_acc_number,
|
||||
const acc_cond::acc_code& target_acc,
|
||||
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
|
||||
trace << "dtgba_sat_synthetize(..., nacc = " << target_acc_number
|
||||
<< ", acc = \"" << target_acc
|
||||
<< "\", states = " << target_state_number
|
||||
<< ", state_based = " << state_based << ")\n";
|
||||
|
||||
dict d(a);
|
||||
d.cand_size = target_state_number;
|
||||
d.cand_nacc = target_acc_number;
|
||||
d.cand_acc = target_acc;
|
||||
|
||||
satsolver solver;
|
||||
satsolver::solution_pair solution;
|
||||
|
|
@ -948,6 +936,7 @@ namespace spot
|
|||
twa_graph_ptr
|
||||
dtgba_sat_minimize(const const_twa_graph_ptr& a,
|
||||
unsigned target_acc_number,
|
||||
const acc_cond::acc_code& target_acc,
|
||||
bool state_based)
|
||||
{
|
||||
int n_states = stats_reachable(a).states;
|
||||
|
|
@ -957,7 +946,7 @@ namespace spot
|
|||
{
|
||||
auto next =
|
||||
dtgba_sat_synthetize(prev ? prev : a, target_acc_number,
|
||||
--n_states, state_based);
|
||||
target_acc, --n_states, state_based);
|
||||
if (!next)
|
||||
return prev;
|
||||
else
|
||||
|
|
@ -970,6 +959,7 @@ namespace spot
|
|||
twa_graph_ptr
|
||||
dtgba_sat_minimize_dichotomy(const const_twa_graph_ptr& a,
|
||||
unsigned target_acc_number,
|
||||
const acc_cond::acc_code& target_acc,
|
||||
bool state_based)
|
||||
{
|
||||
int max_states = stats_reachable(a).states - 1;
|
||||
|
|
@ -980,8 +970,8 @@ namespace spot
|
|||
{
|
||||
int target = (max_states + min_states) / 2;
|
||||
auto next =
|
||||
dtgba_sat_synthetize(prev ? prev : a, target_acc_number, target,
|
||||
state_based);
|
||||
dtgba_sat_synthetize(prev ? prev : a, target_acc_number,
|
||||
target_acc, target, state_based);
|
||||
if (!next)
|
||||
{
|
||||
min_states = target + 1;
|
||||
|
|
@ -995,4 +985,69 @@ namespace spot
|
|||
return prev;
|
||||
}
|
||||
|
||||
twa_graph_ptr
|
||||
sat_minimize(twa_graph_ptr a, const char* opt)
|
||||
{
|
||||
option_map om;
|
||||
auto err = om.parse_options(opt);
|
||||
if (err)
|
||||
{
|
||||
std::string e = "failed to parse option near ";
|
||||
e += err;
|
||||
throw std::runtime_error(e);
|
||||
}
|
||||
|
||||
if (!is_deterministic(a))
|
||||
throw std::runtime_error
|
||||
("SAT-based minimization only work with deterministic automata");
|
||||
|
||||
bool sb = om.get("state-based", 0);
|
||||
bool dicho = om.get("dichotomy", 0);
|
||||
int states = om.get("states", -1);
|
||||
int nacc = om.get("gba", -1);
|
||||
|
||||
acc_cond::acc_code target_acc = a->get_acceptance();
|
||||
if (nacc != -1)
|
||||
target_acc = acc_cond::generalized_buchi(nacc);
|
||||
else
|
||||
nacc = a->acc().num_sets();
|
||||
|
||||
bool target_is_buchi =
|
||||
(nacc == 1 && target_acc.size() == 2 &&
|
||||
target_acc[1].op == acc_cond::acc_op::Inf
|
||||
&& target_acc[0].mark.has(0));
|
||||
|
||||
tgba_complete_here(a);
|
||||
|
||||
if (sb)
|
||||
a = sbacc(a);
|
||||
|
||||
if (states == -1)
|
||||
{
|
||||
if (!target_is_buchi || !a->acc().is_buchi())
|
||||
a = (dicho ? dtgba_sat_minimize_dichotomy : dtgba_sat_minimize)
|
||||
(a, nacc, target_acc, sb);
|
||||
else
|
||||
a = (dicho ? dtba_sat_minimize_dichotomy : dtba_sat_minimize)
|
||||
(a, sb);
|
||||
}
|
||||
else
|
||||
{
|
||||
if (!target_is_buchi || !a->acc().is_buchi())
|
||||
a = dtgba_sat_synthetize(a, nacc, target_acc, states, sb);
|
||||
else
|
||||
a = dtba_sat_synthetize(a, states, sb);
|
||||
}
|
||||
|
||||
if (a)
|
||||
{
|
||||
if (a->acc().is_generalized_buchi())
|
||||
a = scc_filter(a);
|
||||
else
|
||||
a->purge_dead_states();
|
||||
}
|
||||
|
||||
return a;
|
||||
}
|
||||
|
||||
}
|
||||
|
|
|
|||
|
|
@ -1,6 +1,6 @@
|
|||
// -*- coding: utf-8 -*-
|
||||
// Copyright (C) 2013, 2014 Laboratoire de Recherche et Développement
|
||||
// de l'Epita.
|
||||
// Copyright (C) 2013, 2014, 2015 Laboratoire de Recherche et
|
||||
// Développement de l'Epita.
|
||||
//
|
||||
// This file is part of Spot, a model checking library.
|
||||
//
|
||||
|
|
@ -31,6 +31,8 @@ namespace spot
|
|||
/// \param target_acc_number is the number of acceptance sets wanted
|
||||
/// in the result.
|
||||
///
|
||||
/// \param target_acc the target acceptance condition
|
||||
///
|
||||
/// \param target_state_number is the desired number of states in
|
||||
/// the result. The output may have less than \a
|
||||
/// target_state_number reachable states.
|
||||
|
|
@ -46,6 +48,7 @@ namespace spot
|
|||
SPOT_API twa_graph_ptr
|
||||
dtgba_sat_synthetize(const const_twa_graph_ptr& a,
|
||||
unsigned target_acc_number,
|
||||
const acc_cond::acc_code& target_acc,
|
||||
int target_state_number,
|
||||
bool state_based = false);
|
||||
|
||||
|
|
@ -58,6 +61,7 @@ namespace spot
|
|||
SPOT_API twa_graph_ptr
|
||||
dtgba_sat_minimize(const const_twa_graph_ptr& a,
|
||||
unsigned target_acc_number,
|
||||
const acc_cond::acc_code& target_acc,
|
||||
bool state_based = false);
|
||||
|
||||
/// \brief Attempt to minimize a deterministic TGBA with a SAT solver.
|
||||
|
|
@ -69,5 +73,21 @@ namespace spot
|
|||
SPOT_API twa_graph_ptr
|
||||
dtgba_sat_minimize_dichotomy(const const_twa_graph_ptr& a,
|
||||
unsigned target_acc_number,
|
||||
const acc_cond::acc_code& target_acc,
|
||||
bool state_based = false);
|
||||
|
||||
/// \brief High-level interface to SAT-based minimization
|
||||
///
|
||||
/// Minimize the automaton \a aut, using options \a opt.
|
||||
/// These options are given a comma-separated list of
|
||||
/// assignments of the form:
|
||||
///
|
||||
/// state-based = 1
|
||||
/// states = 10
|
||||
/// acc = generalized-Buchi 2
|
||||
/// acc = Rabin 3
|
||||
/// acc = same /* default */
|
||||
///
|
||||
SPOT_API twa_graph_ptr
|
||||
sat_minimize(twa_graph_ptr aut, const char* opt);
|
||||
}
|
||||
|
|
|
|||
|
|
@ -355,8 +355,8 @@ namespace spot
|
|||
else
|
||||
// Take the number of acceptance conditions from the input
|
||||
// automaton, not from dba, because dba often has been
|
||||
// degeneralized to beform tba_determinize_check(). MAke
|
||||
// sure it is at least 1.
|
||||
// degeneralized by tba_determinize_check(). Make sure it
|
||||
// is at least 1.
|
||||
target_acc = original_acc > 0 ? original_acc : 1;
|
||||
|
||||
const_twa_graph_ptr in = 0;
|
||||
|
|
@ -390,12 +390,17 @@ namespace spot
|
|||
else
|
||||
{
|
||||
if (sat_states_ != -1)
|
||||
res = dtgba_sat_synthetize(res, target_acc, sat_states_,
|
||||
state_based_);
|
||||
res = dtgba_sat_synthetize
|
||||
(res, target_acc, acc_cond::generalized_buchi(target_acc),
|
||||
sat_states_, state_based_);
|
||||
else if (sat_minimize_ == 1 || sat_minimize_ == -1)
|
||||
res = dtgba_sat_minimize(res, target_acc, state_based_);
|
||||
res = dtgba_sat_minimize
|
||||
(res, target_acc, acc_cond::generalized_buchi(target_acc),
|
||||
state_based_);
|
||||
else // sat_minimize_ == 2
|
||||
res = dtgba_sat_minimize_dichotomy(res, target_acc, state_based_);
|
||||
res = dtgba_sat_minimize_dichotomy
|
||||
(res, target_acc, acc_cond::generalized_buchi(target_acc),
|
||||
state_based_);
|
||||
}
|
||||
|
||||
if (res)
|
||||
|
|
|
|||
|
|
@ -24,7 +24,7 @@
|
|||
|
||||
namespace spot
|
||||
{
|
||||
twa_graph_ptr sbacc(twa_graph_ptr& old)
|
||||
twa_graph_ptr sbacc(twa_graph_ptr old)
|
||||
{
|
||||
if (old->has_state_based_acc())
|
||||
return old;
|
||||
|
|
|
|||
|
|
@ -26,5 +26,5 @@ namespace spot
|
|||
/// \brief Transform an automaton to use state-based acceptance
|
||||
///
|
||||
/// This is independent on the acceptance condition used.
|
||||
SPOT_API twa_graph_ptr sbacc(twa_graph_ptr& aut);
|
||||
SPOT_API twa_graph_ptr sbacc(twa_graph_ptr aut);
|
||||
}
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue