aad5b135ef
* spot/twa/acc.cc: Fix detection of single-pairs gen-Rabin and gen-Streett. * tests/core/randaut.test: Add test case. * NEWS: Mention this issue.
2415 lines
64 KiB
C++
2415 lines
64 KiB
C++
// -*- coding: utf-8 -*-
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// Copyright (C) 2015-2019 Laboratoire de Recherche et Développement
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// 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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//
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// Spot is free software; you can redistribute it and/or modify it
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// under the terms of the GNU General Public License as published by
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// the Free Software Foundation; either version 3 of the License, or
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// (at your option) any later version.
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//
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// Spot is distributed in the hope that it will be useful, but WITHOUT
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// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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// or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
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// License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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#include "config.h"
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#include <iostream>
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#include <sstream>
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#include <set>
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#include <cctype>
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#include <cstring>
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#include <map>
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#include <spot/twa/acc.hh>
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#include "spot/priv/bddalloc.hh"
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#include <spot/misc/minato.hh>
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#include <spot/misc/random.hh>
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using namespace std::string_literals;
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namespace spot
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{
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void acc_cond::report_too_many_sets()
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{
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#define STR(x) #x
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#define VALUESTR(x) STR(x)
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throw std::runtime_error("Too many acceptance sets used. "
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"The limit is " VALUESTR(SPOT_MAX_ACCSETS) ".");
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}
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std::ostream& operator<<(std::ostream& os, spot::acc_cond::mark_t m)
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{
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auto a = m;
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os << '{';
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unsigned level = 0;
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const char* comma = "";
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while (a)
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{
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if (a.has(0))
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{
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os << comma << level;
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comma = ",";
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}
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a >>= 1;
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++level;
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}
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os << '}';
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return os;
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}
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std::ostream& operator<<(std::ostream& os, const acc_cond& acc)
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{
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return os << '(' << acc.num_sets() << ", " << acc.get_acceptance() << ')';
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}
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namespace
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{
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void default_set_printer(std::ostream& os, int v)
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{
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os << v;
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}
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enum code_output {HTML, TEXT, LATEX};
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template<enum code_output style>
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static void
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print_code(std::ostream& os,
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const acc_cond::acc_code& code, unsigned pos,
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std::function<void(std::ostream&, int)> set_printer)
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{
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const char* op_ = style == LATEX ? " \\lor " : " | ";
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auto& w = code[pos];
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const char* negated_pre = "";
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const char* negated_post = "";
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auto set_neg = [&]() {
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if (style == LATEX)
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{
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negated_pre = "\\overline{";
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negated_post = "}";
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}
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else
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{
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negated_pre = "!";
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}
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};
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bool top = pos == code.size() - 1;
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switch (w.sub.op)
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{
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case acc_cond::acc_op::And:
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switch (style)
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{
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case HTML:
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op_ = " & ";
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break;
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case TEXT:
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op_ = " & ";
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break;
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case LATEX:
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op_ = " \\land ";
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break;
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}
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SPOT_FALLTHROUGH;
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case acc_cond::acc_op::Or:
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{
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unsigned sub = pos - w.sub.size;
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if (!top)
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os << '(';
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bool first = true;
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while (sub < pos)
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{
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--pos;
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if (first)
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first = false;
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else
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os << op_;
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print_code<style>(os, code, pos, set_printer);
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pos -= code[pos].sub.size;
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}
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if (!top)
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os << ')';
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}
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break;
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case acc_cond::acc_op::InfNeg:
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set_neg();
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SPOT_FALLTHROUGH;
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case acc_cond::acc_op::Inf:
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{
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auto a = code[pos - 1].mark;
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if (!a)
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{
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if (style == LATEX)
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os << "\\mathsf{t}";
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else
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os << 't';
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}
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else
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{
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if (!top)
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// Avoid extra parentheses if there is only one set
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top = code[pos - 1].mark.count() == 1;
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unsigned level = 0;
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const char* and_ = "";
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const char* and_next_ = []() {
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// The lack of surrounding space in HTML and
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// TEXT is on purpose: we want to
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// distinguish those grouped "Inf"s from
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// other terms that are ANDed together.
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switch (style)
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{
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case HTML:
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return "&";
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case TEXT:
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return "&";
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case LATEX:
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return " \\land ";
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}
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}();
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if (!top)
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os << '(';
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const char* inf_ = (style == LATEX) ? "\\mathsf{Inf}(" : "Inf(";
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while (a)
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{
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if (a.has(0))
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{
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os << and_ << inf_ << negated_pre;
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set_printer(os, level);
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os << negated_post << ')';
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and_ = and_next_;
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}
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a >>= 1;
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++level;
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}
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if (!top)
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os << ')';
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}
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}
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break;
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case acc_cond::acc_op::FinNeg:
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set_neg();
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SPOT_FALLTHROUGH;
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case acc_cond::acc_op::Fin:
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{
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auto a = code[pos - 1].mark;
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if (!a)
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{
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if (style == LATEX)
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os << "\\mathsf{f}";
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else
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os << 'f';
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}
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else
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{
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if (!top)
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// Avoid extra parentheses if there is only one set
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top = code[pos - 1].mark.count() == 1;
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unsigned level = 0;
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const char* or_ = "";
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if (!top)
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os << '(';
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const char* fin_ = (style == LATEX) ? "\\mathsf{Fin}(" : "Fin(";
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while (a)
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{
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if (a.has(0))
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{
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os << or_ << fin_ << negated_pre;
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set_printer(os, level);
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os << negated_post << ')';
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// The lack of surrounding space in HTML and
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// TEXT is on purpose: we want to distinguish
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// those grouped "Fin"s from other terms that
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// are ORed together.
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or_ = style == LATEX ? " \\lor " : "|";
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}
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a >>= 1;
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++level;
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}
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if (!top)
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os << ')';
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}
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}
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break;
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}
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}
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static bool
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eval(acc_cond::mark_t inf, const acc_cond::acc_word* pos)
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{
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switch (pos->sub.op)
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{
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case acc_cond::acc_op::And:
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{
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auto sub = pos - pos->sub.size;
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while (sub < pos)
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{
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--pos;
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if (!eval(inf, pos))
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return false;
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pos -= pos->sub.size;
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}
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return true;
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}
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case acc_cond::acc_op::Or:
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{
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auto sub = pos - pos->sub.size;
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while (sub < pos)
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{
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--pos;
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if (eval(inf, pos))
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return true;
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pos -= pos->sub.size;
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}
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return false;
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}
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case acc_cond::acc_op::Inf:
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return (pos[-1].mark & inf) == pos[-1].mark;
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case acc_cond::acc_op::Fin:
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return (pos[-1].mark & inf) != pos[-1].mark;
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case acc_cond::acc_op::FinNeg:
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case acc_cond::acc_op::InfNeg:
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SPOT_UNREACHABLE();
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}
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SPOT_UNREACHABLE();
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return false;
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}
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static trival
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partial_eval(acc_cond::mark_t infinitely_often,
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acc_cond::mark_t always_present,
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const acc_cond::acc_word* pos)
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{
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switch (pos->sub.op)
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{
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case acc_cond::acc_op::And:
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{
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auto sub = pos - pos->sub.size;
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trival res = true;
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while (sub < pos)
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{
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--pos;
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res = res &&
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partial_eval(infinitely_often, always_present, pos);
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if (res.is_false())
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return res;
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pos -= pos->sub.size;
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}
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return res;
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}
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case acc_cond::acc_op::Or:
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{
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auto sub = pos - pos->sub.size;
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trival res = false;
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while (sub < pos)
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{
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--pos;
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res = res ||
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partial_eval(infinitely_often, always_present, pos);
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if (res.is_true())
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return res;
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pos -= pos->sub.size;
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}
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return res;
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}
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case acc_cond::acc_op::Inf:
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return (pos[-1].mark & infinitely_often) == pos[-1].mark;
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case acc_cond::acc_op::Fin:
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if ((pos[-1].mark & always_present) == pos[-1].mark)
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return false;
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else if ((pos[-1].mark & infinitely_often) != pos[-1].mark)
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return true;
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else
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return trival::maybe();
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case acc_cond::acc_op::FinNeg:
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case acc_cond::acc_op::InfNeg:
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SPOT_UNREACHABLE();
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}
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SPOT_UNREACHABLE();
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return false;
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}
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static acc_cond::mark_t
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eval_sets(acc_cond::mark_t inf, const acc_cond::acc_word* pos)
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{
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switch (pos->sub.op)
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{
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case acc_cond::acc_op::And:
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{
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auto sub = pos - pos->sub.size;
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acc_cond::mark_t m = {};
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while (sub < pos)
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{
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--pos;
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if (auto s = eval_sets(inf, pos))
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m |= s;
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else
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return {};
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pos -= pos->sub.size;
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}
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return m;
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}
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case acc_cond::acc_op::Or:
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{
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auto sub = pos - pos->sub.size;
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while (sub < pos)
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{
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--pos;
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if (auto s = eval_sets(inf, pos))
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return s;
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pos -= pos->sub.size;
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}
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return {};
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}
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case acc_cond::acc_op::Inf:
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if ((pos[-1].mark & inf) == pos[-1].mark)
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return pos[-1].mark;
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else
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return {};
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case acc_cond::acc_op::Fin:
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case acc_cond::acc_op::FinNeg:
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case acc_cond::acc_op::InfNeg:
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SPOT_UNREACHABLE();
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}
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SPOT_UNREACHABLE();
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return {};
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}
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}
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bool acc_cond::acc_code::accepting(mark_t inf) const
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{
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if (empty())
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return true;
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return eval(inf, &back());
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}
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trival acc_cond::acc_code::maybe_accepting(mark_t infinitely_often,
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mark_t always_present) const
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{
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if (empty())
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return true;
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return partial_eval(infinitely_often | always_present,
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always_present, &back());
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}
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bool acc_cond::acc_code::inf_satisfiable(mark_t inf) const
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{
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return !maybe_accepting(inf, {}).is_false();
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}
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acc_cond::mark_t acc_cond::accepting_sets(mark_t inf) const
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{
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if (uses_fin_acceptance())
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throw std::runtime_error
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("Fin acceptance is not supported by this code path.");
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if (code_.empty())
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return {};
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return eval_sets(inf, &code_.back());
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}
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bool acc_cond::check_fin_acceptance() const
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{
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if (code_.empty())
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return false;
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unsigned pos = code_.size();
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do
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{
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switch (code_[pos - 1].sub.op)
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{
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case acc_cond::acc_op::And:
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case acc_cond::acc_op::Or:
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--pos;
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break;
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case acc_cond::acc_op::Inf:
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case acc_cond::acc_op::InfNeg:
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pos -= 2;
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break;
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case acc_cond::acc_op::Fin:
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if (!code_[pos - 2].mark) // f
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{
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pos -= 2;
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break;
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}
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SPOT_FALLTHROUGH;
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case acc_cond::acc_op::FinNeg:
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return true;
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}
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}
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while (pos > 0);
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return false;
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}
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namespace
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{
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// Is Rabin or Streett, depending on highop and lowop.
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static bool
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is_rs(const acc_cond::acc_code& code,
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acc_cond::acc_op highop,
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acc_cond::acc_op lowop,
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acc_cond::mark_t all_sets)
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{
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unsigned s = code.back().sub.size;
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auto mainop = code.back().sub.op;
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if (mainop == highop)
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{
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// The size must be a multiple of 5.
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if ((s != code.size() - 1) || (s % 5))
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return false;
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}
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else // Single pair?
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{
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if (s != 4 || mainop != lowop)
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return false;
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// Pretend we were in a unary highop.
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s = 5;
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}
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acc_cond::mark_t seen_fin = {};
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acc_cond::mark_t seen_inf = {};
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while (s)
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{
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if (code[--s].sub.op != lowop)
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return false;
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auto o1 = code[--s].sub.op;
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auto m1 = code[--s].mark;
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auto o2 = code[--s].sub.op;
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auto m2 = code[--s].mark;
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// We assume
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// Fin(n) lowop Inf(n+1)
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// o1 (m1) o2 (m2)
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// swap if it is the converse
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if (o2 == acc_cond::acc_op::Fin)
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{
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std::swap(o1, o2);
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std::swap(m1, m2);
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}
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if (o1 != acc_cond::acc_op::Fin
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|| o2 != acc_cond::acc_op::Inf
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|| m1.count() != 1
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|| m2 != (m1 << 1))
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return false;
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seen_fin |= m1;
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seen_inf |= m2;
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}
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return (!(seen_fin & seen_inf)
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&& (seen_fin | seen_inf) == all_sets);
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}
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// Is Rabin-like or Streett-like, depending on highop and lowop.
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static bool
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is_rs_like(const acc_cond::acc_code& code,
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acc_cond::acc_op highop,
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acc_cond::acc_op lowop,
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acc_cond::acc_op singleop,
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std::vector<acc_cond::rs_pair>& pairs)
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{
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assert(pairs.empty());
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unsigned s = code.back().sub.size;
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auto mainop = code.back().sub.op;
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if (mainop == acc_cond::acc_op::Fin || mainop == acc_cond::acc_op::Inf)
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{
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assert(code.size() == 2);
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auto m = code[0].mark;
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if (mainop == singleop && m.count() != 1)
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return false;
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acc_cond::mark_t fin = {};
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acc_cond::mark_t inf = {};
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for (unsigned mark: m.sets())
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{
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if (mainop == acc_cond::acc_op::Fin)
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fin = {mark};
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else
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inf = {mark};
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pairs.emplace_back(fin, inf);
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}
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return true;
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}
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else if (mainop == lowop) // Single pair?
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{
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if (s != 4)
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return false;
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// Pretend we were in a unary highop.
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s = 5;
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}
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else if (mainop != highop)
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{
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return false;
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}
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while (s)
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{
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auto op = code[--s].sub.op;
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auto size = code[s].sub.size;
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if (op == acc_cond::acc_op::Fin
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|| op == acc_cond::acc_op::Inf)
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{
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auto m = code[--s].mark;
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acc_cond::mark_t fin = {};
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acc_cond::mark_t inf = {};
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if (op == singleop && m.count() != 1)
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{
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pairs.clear();
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return false;
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}
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for (unsigned mark: m.sets())
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{
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if (op == acc_cond::acc_op::Fin)
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fin = {mark};
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else //fin
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inf = {mark};
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pairs.emplace_back(fin, inf);
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}
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}
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else
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{
|
|
if (op != lowop || size != 4)
|
|
{
|
|
pairs.clear();
|
|
return false;
|
|
}
|
|
|
|
auto o1 = code[--s].sub.op;
|
|
auto m1 = code[--s].mark;
|
|
auto o2 = code[--s].sub.op;
|
|
auto m2 = code[--s].mark;
|
|
|
|
// We assume
|
|
// Fin(n) lowop Inf(n+1)
|
|
// o1 (m1) o2 (m2)
|
|
// swap if it is the converse
|
|
if (o2 == acc_cond::acc_op::Fin)
|
|
{
|
|
std::swap(o1, o2);
|
|
std::swap(m1, m2);
|
|
}
|
|
if (o1 != acc_cond::acc_op::Fin
|
|
|| o2 != acc_cond::acc_op::Inf
|
|
|| m1.count() != 1
|
|
|| m2.count() != 1)
|
|
{
|
|
pairs.clear();
|
|
return false;
|
|
}
|
|
pairs.emplace_back(m1, m2);
|
|
}
|
|
}
|
|
|
|
return true;
|
|
}
|
|
}
|
|
|
|
int acc_cond::is_rabin() const
|
|
{
|
|
if (code_.is_f())
|
|
return num_ == 0 ? 0 : -1;
|
|
if ((num_ & 1) || code_.is_t())
|
|
return -1;
|
|
|
|
if (is_rs(code_, acc_op::Or, acc_op::And, all_sets()))
|
|
return num_ / 2;
|
|
else
|
|
return -1;
|
|
}
|
|
|
|
int acc_cond::is_streett() const
|
|
{
|
|
if (code_.is_t())
|
|
return num_ == 0 ? 0 : -1;
|
|
if ((num_ & 1) || code_.is_f())
|
|
return -1;
|
|
|
|
if (is_rs(code_, acc_op::And, acc_op::Or, all_sets()))
|
|
return num_ / 2;
|
|
else
|
|
return -1;
|
|
}
|
|
|
|
bool acc_cond::is_streett_like(std::vector<rs_pair>& pairs) const
|
|
{
|
|
pairs.clear();
|
|
if (code_.is_t())
|
|
return true;
|
|
if (code_.is_f())
|
|
{
|
|
pairs.emplace_back(mark_t({}), mark_t({}));
|
|
return true;
|
|
}
|
|
return is_rs_like(code_, acc_op::And, acc_op::Or, acc_op::Fin, pairs);
|
|
}
|
|
|
|
bool acc_cond::is_rabin_like(std::vector<rs_pair>& pairs) const
|
|
{
|
|
pairs.clear();
|
|
if (code_.is_f())
|
|
return true;
|
|
if (code_.is_t())
|
|
{
|
|
pairs.emplace_back(mark_t({}), mark_t({}));
|
|
return true;
|
|
}
|
|
return is_rs_like(code_, acc_op::Or, acc_op::And, acc_op::Inf, pairs);
|
|
}
|
|
|
|
|
|
// PAIRS contains the number of Inf in each pair.
|
|
bool acc_cond::is_generalized_rabin(std::vector<unsigned>& pairs) const
|
|
{
|
|
pairs.clear();
|
|
if (is_generalized_co_buchi())
|
|
{
|
|
pairs.resize(num_);
|
|
return true;
|
|
}
|
|
// "Acceptance: 0 f" is caught by is_generalized_rabin() above.
|
|
// Therefore is_f() below catches "Acceptance: n f" with n>0.
|
|
if (code_.is_f() || code_.is_t())
|
|
return false;
|
|
|
|
auto s = code_.back().sub.size;
|
|
acc_cond::mark_t seen_fin = {};
|
|
acc_cond::mark_t seen_inf = {};
|
|
|
|
// generalized Rabin should start with Or, unless
|
|
// it has a single pair.
|
|
bool singlepair = false;
|
|
{
|
|
auto topop = code_.back().sub.op;
|
|
if (topop == acc_op::And)
|
|
{
|
|
// Probably single-pair generalized-Rabin. Shift the source
|
|
// by one position as if we had an invisible Or in front.
|
|
++s;
|
|
singlepair = true;
|
|
}
|
|
else if (topop != acc_op::Or)
|
|
{
|
|
return false;
|
|
}
|
|
}
|
|
|
|
// Each pair is the position of a Fin followed
|
|
// by the number of Inf.
|
|
std::map<unsigned, unsigned> p;
|
|
while (s)
|
|
{
|
|
--s;
|
|
if (code_[s].sub.op == acc_op::And)
|
|
{
|
|
auto o1 = code_[--s].sub.op;
|
|
auto m1 = code_[--s].mark;
|
|
auto o2 = code_[--s].sub.op;
|
|
auto m2 = code_[--s].mark;
|
|
|
|
// We assume
|
|
// Fin(n) & Inf({n+1,n+2,...,n+i})
|
|
// o1 (m1) o2 (m2)
|
|
// swap if it is the converse
|
|
if (o2 == acc_cond::acc_op::Fin)
|
|
{
|
|
std::swap(o1, o2);
|
|
std::swap(m1, m2);
|
|
}
|
|
|
|
if (o1 != acc_cond::acc_op::Fin
|
|
|| o2 != acc_cond::acc_op::Inf
|
|
|| m1.count() != 1)
|
|
return false;
|
|
|
|
unsigned i = m2.count();
|
|
// If we have seen this pair already, it must have the
|
|
// same size.
|
|
if (p.emplace(m1.max_set() - 1, i).first->second != i)
|
|
return false;
|
|
assert(i > 0);
|
|
unsigned j = m1.max_set(); // == n+1
|
|
do
|
|
if (!m2.has(j++))
|
|
return false;
|
|
while (--i);
|
|
seen_fin |= m1;
|
|
seen_inf |= m2;
|
|
}
|
|
else if (code_[s].sub.op == acc_op::Fin)
|
|
{
|
|
auto m1 = code_[--s].mark;
|
|
for (auto s: m1.sets())
|
|
// If we have seen this pair already, it must have the
|
|
// same size.
|
|
{
|
|
if (p.emplace(s, 0U).first->second != 0U)
|
|
return false;
|
|
}
|
|
seen_fin |= m1;
|
|
}
|
|
else
|
|
{
|
|
return false;
|
|
}
|
|
}
|
|
for (auto i: p)
|
|
pairs.emplace_back(i.second);
|
|
return ((!singlepair || pairs.size() == 1)
|
|
&& !(seen_fin & seen_inf)
|
|
&& (seen_fin | seen_inf) == all_sets());
|
|
}
|
|
|
|
// PAIRS contains the number of Inf in each pair.
|
|
bool acc_cond::is_generalized_streett(std::vector<unsigned>& pairs) const
|
|
{
|
|
pairs.clear();
|
|
if (is_generalized_buchi())
|
|
{
|
|
pairs.resize(num_);
|
|
return true;
|
|
}
|
|
// "Acceptance: 0 t" is caught by is_generalized_buchi() above.
|
|
// Therefore is_t() below catches "Acceptance: n t" with n>0.
|
|
if (code_.is_t() || code_.is_f())
|
|
return false;
|
|
|
|
auto s = code_.back().sub.size;
|
|
acc_cond::mark_t seen_fin = {};
|
|
acc_cond::mark_t seen_inf = {};
|
|
|
|
// generalized Streett should start with And, unless
|
|
// it has a single pair.
|
|
bool singlepair = false;
|
|
{
|
|
auto topop = code_.back().sub.op;
|
|
if (topop == acc_op::Or)
|
|
{
|
|
// Probably single-pair generalized-Streett. Shift the source
|
|
// by one position as if we had an invisible And in front.
|
|
++s;
|
|
singlepair = true;
|
|
}
|
|
else if (topop != acc_op::And)
|
|
{
|
|
return false;
|
|
}
|
|
}
|
|
|
|
|
|
// Each pairs is the position of a Inf followed
|
|
// by the number of Fin.
|
|
std::map<unsigned, unsigned> p;
|
|
while (s)
|
|
{
|
|
--s;
|
|
if (code_[s].sub.op == acc_op::Or)
|
|
{
|
|
auto o1 = code_[--s].sub.op;
|
|
auto m1 = code_[--s].mark;
|
|
auto o2 = code_[--s].sub.op;
|
|
auto m2 = code_[--s].mark;
|
|
|
|
// We assume
|
|
// Inf(n) | Fin({n+1,n+2,...,n+i})
|
|
// o1 (m1) o2 (m2)
|
|
// swap if it is the converse
|
|
if (o2 == acc_cond::acc_op::Inf)
|
|
{
|
|
std::swap(o1, o2);
|
|
std::swap(m1, m2);
|
|
}
|
|
|
|
if (o1 != acc_cond::acc_op::Inf
|
|
|| o2 != acc_cond::acc_op::Fin
|
|
|| m1.count() != 1)
|
|
return false;
|
|
|
|
unsigned i = m2.count();
|
|
// If we have seen this pair already, it must have the
|
|
// same size.
|
|
if (p.emplace(m1.max_set() - 1, i).first->second != i)
|
|
return false;
|
|
assert(i > 0);
|
|
unsigned j = m1.max_set(); // == n+1
|
|
do
|
|
if (!m2.has(j++))
|
|
return false;
|
|
while (--i);
|
|
|
|
seen_inf |= m1;
|
|
seen_fin |= m2;
|
|
}
|
|
else if (code_[s].sub.op == acc_op::Inf)
|
|
{
|
|
auto m1 = code_[--s].mark;
|
|
for (auto s: m1.sets())
|
|
// If we have seen this pair already, it must have the
|
|
// same size.
|
|
if (p.emplace(s, 0U).first->second != 0U)
|
|
return false;
|
|
seen_inf |= m1;
|
|
}
|
|
else
|
|
{
|
|
return false;
|
|
}
|
|
}
|
|
for (auto i: p)
|
|
pairs.emplace_back(i.second);
|
|
return ((!singlepair || pairs.size() == 1)
|
|
&& !(seen_inf & seen_fin)
|
|
&& (seen_inf | seen_fin) == all_sets());
|
|
}
|
|
|
|
acc_cond::acc_code
|
|
acc_cond::acc_code::parity(bool max, bool odd, unsigned sets)
|
|
{
|
|
acc_cond::acc_code res;
|
|
|
|
if (max)
|
|
res = odd ? t() : f();
|
|
else
|
|
res = ((sets & 1) == odd) ? t() : f();
|
|
|
|
if (sets == 0)
|
|
return res;
|
|
|
|
// When you look at something like
|
|
// acc-name: parity min even 5
|
|
// Acceptance: 5 Inf(0) | (Fin(1) & (Inf(2) | (Fin(3) & Inf(4))))
|
|
// remember that we build it from right to left.
|
|
int start = max ? 0 : sets - 1;
|
|
int inc = max ? 1 : -1;
|
|
int end = max ? sets : -1;
|
|
for (int i = start; i != end; i += inc)
|
|
{
|
|
if ((i & 1) == odd)
|
|
res |= inf({(unsigned)i});
|
|
else
|
|
res &= fin({(unsigned)i});
|
|
}
|
|
return res;
|
|
}
|
|
|
|
acc_cond::acc_code
|
|
acc_cond::acc_code::random(unsigned n_accs, double reuse)
|
|
{
|
|
// With 0 acceptance sets, we always generate the true acceptance.
|
|
// (Working with false is somehow pointless, and the formulas we
|
|
// generate for n_accs>0 are always satisfiable, so it makes sense
|
|
// that it should be satisfiable for n_accs=0 as well.)
|
|
if (n_accs == 0)
|
|
return {};
|
|
|
|
std::vector<acc_cond::acc_code> codes;
|
|
codes.reserve(n_accs);
|
|
for (unsigned i = 0; i < n_accs; ++i)
|
|
{
|
|
codes.emplace_back(drand() < 0.5 ? inf({i}) : fin({i}));
|
|
if (reuse > 0.0 && drand() < reuse)
|
|
--i;
|
|
}
|
|
|
|
int s = codes.size();
|
|
while (s > 1)
|
|
{
|
|
// Pick a random code and put it at the end
|
|
int p1 = mrand(s--);
|
|
if (p1 != s) // https://gcc.gnu.org/bugzilla//show_bug.cgi?id=59603
|
|
std::swap(codes[p1], codes[s]);
|
|
// and another one
|
|
int p2 = mrand(s);
|
|
|
|
if (drand() < 0.5)
|
|
codes[p2] |= std::move(codes.back());
|
|
else
|
|
codes[p2] &= std::move(codes.back());
|
|
|
|
codes.pop_back();
|
|
}
|
|
return codes[0];
|
|
}
|
|
|
|
namespace
|
|
{
|
|
bdd to_bdd_rec(const acc_cond::acc_word* c, const bdd* map)
|
|
{
|
|
auto sz = c->sub.size;
|
|
auto start = c - sz - 1;
|
|
auto op = c->sub.op;
|
|
switch (op)
|
|
{
|
|
case acc_cond::acc_op::Or:
|
|
{
|
|
--c;
|
|
bdd res = bddfalse;
|
|
do
|
|
{
|
|
res |= to_bdd_rec(c, map);
|
|
c -= c->sub.size + 1;
|
|
}
|
|
while (c > start);
|
|
return res;
|
|
}
|
|
case acc_cond::acc_op::And:
|
|
{
|
|
--c;
|
|
bdd res = bddtrue;
|
|
do
|
|
{
|
|
res &= to_bdd_rec(c, map);
|
|
c -= c->sub.size + 1;
|
|
}
|
|
while (c > start);
|
|
return res;
|
|
}
|
|
case acc_cond::acc_op::Fin:
|
|
{
|
|
bdd res = bddfalse;
|
|
for (auto i: c[-1].mark.sets())
|
|
res |= !map[i];
|
|
return res;
|
|
}
|
|
case acc_cond::acc_op::Inf:
|
|
{
|
|
bdd res = bddtrue;
|
|
for (auto i: c[-1].mark.sets())
|
|
res &= map[i];
|
|
return res;
|
|
}
|
|
case acc_cond::acc_op::InfNeg:
|
|
case acc_cond::acc_op::FinNeg:
|
|
SPOT_UNREACHABLE();
|
|
return bddfalse;
|
|
}
|
|
SPOT_UNREACHABLE();
|
|
return bddfalse;
|
|
}
|
|
|
|
static bool
|
|
equiv_codes(const acc_cond::acc_code& lhs,
|
|
const acc_cond::acc_code& rhs)
|
|
{
|
|
auto used = lhs.used_sets() | rhs.used_sets();
|
|
unsigned c = used.count();
|
|
unsigned umax = used.max_set();
|
|
|
|
bdd_allocator ba;
|
|
int base = ba.allocate_variables(c);
|
|
assert(base == 0);
|
|
std::vector<bdd> r;
|
|
for (unsigned i = 0; r.size() < umax; ++i)
|
|
if (used.has(i))
|
|
r.emplace_back(bdd_ithvar(base++));
|
|
else
|
|
r.emplace_back(bddfalse);
|
|
return to_bdd_rec(&lhs.back(), &r[0]) == to_bdd_rec(&rhs.back(), &r[0]);
|
|
}
|
|
}
|
|
|
|
std::vector<unsigned>
|
|
acc_cond::acc_code::symmetries() const
|
|
{
|
|
auto used = used_sets();
|
|
unsigned umax = used.max_set();
|
|
|
|
bdd_allocator ba;
|
|
int base = ba.allocate_variables(umax+2);
|
|
assert(base == 0);
|
|
std::vector<bdd> r;
|
|
for (unsigned i = 0; r.size() < umax; ++i)
|
|
r.emplace_back(bdd_ithvar(base++));
|
|
bdd bddcode = to_bdd_rec(&back(), &r[0]);
|
|
bdd tmp;
|
|
|
|
std::vector<unsigned> res(umax);
|
|
for (unsigned x = 0; x < umax; ++x)
|
|
res[x] = x;
|
|
|
|
for (unsigned x : used.sets())
|
|
for (unsigned y : used.sets())
|
|
{
|
|
if (x >= y)
|
|
continue;
|
|
if (res[x] != x)
|
|
continue;
|
|
|
|
{
|
|
bddPair* p = bdd_newpair();
|
|
bdd_setpair(p, x, umax + 0);
|
|
bdd_setpair(p, y, umax + 1);
|
|
tmp = bdd_replace(bddcode, p);
|
|
bdd_freepair(p);
|
|
|
|
p = bdd_newpair();
|
|
bdd_setpair(p, umax + 0, y);
|
|
bdd_setpair(p, umax + 1, x);
|
|
tmp = bdd_replace(tmp, p);
|
|
bdd_freepair(p);
|
|
}
|
|
|
|
if (tmp == bddcode)
|
|
res[y] = x;
|
|
}
|
|
|
|
return res;
|
|
}
|
|
|
|
bool acc_cond::is_parity(bool& max, bool& odd, bool equiv) const
|
|
{
|
|
unsigned sets = num_;
|
|
if (sets == 0)
|
|
{
|
|
max = true;
|
|
odd = is_t();
|
|
return true;
|
|
}
|
|
acc_cond::mark_t u_inf;
|
|
acc_cond::mark_t u_fin;
|
|
std::tie(u_inf, u_fin) = code_.used_inf_fin_sets();
|
|
|
|
odd = !u_inf.has(0);
|
|
for (auto s: u_inf.sets())
|
|
if ((s & 1) != odd)
|
|
{
|
|
max = false; // just so the value is not uninitialized
|
|
return false;
|
|
}
|
|
|
|
auto max_code = acc_code::parity(true, odd, sets);
|
|
if (max_code == code_)
|
|
{
|
|
max = true;
|
|
return true;
|
|
}
|
|
auto min_code = acc_code::parity(false, odd, sets);
|
|
if (min_code == code_)
|
|
{
|
|
max = false;
|
|
return true;
|
|
}
|
|
|
|
if (!equiv)
|
|
{
|
|
max = false;
|
|
return false;
|
|
}
|
|
|
|
if (equiv_codes(code_, max_code))
|
|
{
|
|
max = true;
|
|
return true;
|
|
}
|
|
if (equiv_codes(code_, min_code))
|
|
{
|
|
max = false;
|
|
return true;
|
|
}
|
|
max = false;
|
|
return false;
|
|
}
|
|
|
|
acc_cond::acc_code acc_cond::acc_code::to_dnf() const
|
|
{
|
|
if (empty() || size() == 2)
|
|
return *this;
|
|
|
|
auto used = acc_cond::acc_code::used_sets();
|
|
unsigned c = used.count();
|
|
unsigned max = used.max_set();
|
|
|
|
bdd_allocator ba;
|
|
int base = ba.allocate_variables(c);
|
|
assert(base == 0);
|
|
std::vector<bdd> r;
|
|
std::vector<unsigned> sets(c);
|
|
for (unsigned i = 0; r.size() < max; ++i)
|
|
{
|
|
if (used.has(i))
|
|
{
|
|
sets[base] = i;
|
|
r.emplace_back(bdd_ithvar(base++));
|
|
}
|
|
else
|
|
{
|
|
r.emplace_back(bddfalse);
|
|
}
|
|
}
|
|
|
|
bdd res = to_bdd_rec(&back(), &r[0]);
|
|
|
|
if (res == bddtrue)
|
|
return t();
|
|
if (res == bddfalse)
|
|
return f();
|
|
|
|
minato_isop isop(res);
|
|
bdd cube;
|
|
acc_code rescode = f();
|
|
while ((cube = isop.next()) != bddfalse)
|
|
{
|
|
mark_t i = {};
|
|
acc_code f;
|
|
while (cube != bddtrue)
|
|
{
|
|
// The acceptance set associated to this BDD variable
|
|
mark_t s = {};
|
|
s.set(sets[bdd_var(cube)]);
|
|
|
|
bdd h = bdd_high(cube);
|
|
if (h == bddfalse) // Negative variable? -> Fin
|
|
{
|
|
cube = bdd_low(cube);
|
|
// The strange order here make sure we can smaller set
|
|
// numbers at the end of the acceptance code, i.e., at
|
|
// the front of the output.
|
|
f = fin(s) & f;
|
|
}
|
|
else // Positive variable? -> Inf
|
|
{
|
|
i |= s;
|
|
cube = h;
|
|
}
|
|
}
|
|
// See comment above for the order.
|
|
rescode = (inf(i) & f) | rescode;
|
|
}
|
|
|
|
return rescode;
|
|
}
|
|
|
|
acc_cond::acc_code acc_cond::acc_code::to_cnf() const
|
|
{
|
|
if (empty() || size() == 2)
|
|
return *this;
|
|
|
|
auto used = acc_cond::acc_code::used_sets();
|
|
unsigned c = used.count();
|
|
unsigned max = used.max_set();
|
|
|
|
bdd_allocator ba;
|
|
int base = ba.allocate_variables(c);
|
|
assert(base == 0);
|
|
std::vector<bdd> r;
|
|
std::vector<unsigned> sets(c);
|
|
for (unsigned i = 0; r.size() < max; ++i)
|
|
{
|
|
if (used.has(i))
|
|
{
|
|
sets[base] = i;
|
|
r.emplace_back(bdd_ithvar(base++));
|
|
}
|
|
else
|
|
{
|
|
r.emplace_back(bddfalse);
|
|
}
|
|
}
|
|
|
|
bdd res = to_bdd_rec(&back(), &r[0]);
|
|
|
|
if (res == bddtrue)
|
|
return t();
|
|
if (res == bddfalse)
|
|
return f();
|
|
|
|
minato_isop isop(!res);
|
|
bdd cube;
|
|
acc_code rescode;
|
|
while ((cube = isop.next()) != bddfalse)
|
|
{
|
|
mark_t m = {};
|
|
acc_code i = f();
|
|
while (cube != bddtrue)
|
|
{
|
|
// The acceptance set associated to this BDD variable
|
|
mark_t s = {};
|
|
s.set(sets[bdd_var(cube)]);
|
|
|
|
bdd h = bdd_high(cube);
|
|
if (h == bddfalse) // Negative variable? -> Inf
|
|
{
|
|
cube = bdd_low(cube);
|
|
// The strange order here make sure we can smaller set
|
|
// numbers at the end of the acceptance code, i.e., at
|
|
// the front of the output.
|
|
i = inf(s) | i;
|
|
}
|
|
else // Positive variable? -> Fin
|
|
{
|
|
m |= s;
|
|
cube = h;
|
|
}
|
|
}
|
|
// See comment above for the order.
|
|
rescode = (fin(m) | i) & rescode;
|
|
}
|
|
return rescode;
|
|
}
|
|
|
|
namespace
|
|
{
|
|
template<typename Fun>
|
|
static void
|
|
top_clauses(const acc_cond::acc_code& code,
|
|
acc_cond::acc_op connect, acc_cond::acc_op inf_fin,
|
|
Fun store)
|
|
{
|
|
if (!code.empty())
|
|
{
|
|
auto pos = &code.back();
|
|
auto start = &code.front();
|
|
assert(pos - pos->sub.size == start);
|
|
if (pos->sub.op == connect)
|
|
{
|
|
do
|
|
{
|
|
--pos;
|
|
if (pos->sub.op == inf_fin)
|
|
{
|
|
for (unsigned d: pos[-1].mark.sets())
|
|
{
|
|
acc_cond::acc_code tmp;
|
|
tmp.resize(2);
|
|
tmp[0].mark = {d};
|
|
tmp[1].sub.op = inf_fin;
|
|
tmp[1].sub.size = 1;
|
|
store(tmp);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
store(pos);
|
|
}
|
|
pos -= pos->sub.size;
|
|
}
|
|
while (pos > start);
|
|
return;
|
|
}
|
|
if (pos->sub.op == inf_fin)
|
|
{
|
|
for (unsigned d: pos[-1].mark.sets())
|
|
{
|
|
acc_cond::acc_code tmp;
|
|
tmp.resize(2);
|
|
tmp[0].mark = {d};
|
|
tmp[1].sub.op = inf_fin;
|
|
tmp[1].sub.size = 1;
|
|
store(tmp);
|
|
}
|
|
return;
|
|
}
|
|
}
|
|
store(code);
|
|
return;
|
|
}
|
|
}
|
|
|
|
std::vector<acc_cond::acc_code> acc_cond::acc_code::top_disjuncts() const
|
|
{
|
|
std::vector<acc_cond::acc_code> res;
|
|
top_clauses(*this, acc_cond::acc_op::Or, acc_cond::acc_op::Fin,
|
|
[&](const acc_cond::acc_code& c) { res.emplace_back(c); });
|
|
return res;
|
|
}
|
|
|
|
std::vector<acc_cond::acc_code> acc_cond::acc_code::top_conjuncts() const
|
|
{
|
|
std::vector<acc_cond::acc_code> res;
|
|
top_clauses(*this, acc_cond::acc_op::And, acc_cond::acc_op::Inf,
|
|
[&](const acc_cond::acc_code& c) { res.emplace_back(c); });
|
|
return res;
|
|
}
|
|
|
|
std::vector<acc_cond> acc_cond::top_disjuncts() const
|
|
{
|
|
std::vector<acc_cond> res;
|
|
top_clauses(code_, acc_cond::acc_op::Or, acc_cond::acc_op::Fin,
|
|
[&](const acc_cond::acc_code& c)
|
|
{ res.emplace_back(num_, c); });
|
|
return res;
|
|
}
|
|
|
|
std::vector<acc_cond> acc_cond::top_conjuncts() const
|
|
{
|
|
std::vector<acc_cond> res;
|
|
top_clauses(code_, acc_cond::acc_op::And, acc_cond::acc_op::Inf,
|
|
[&](const acc_cond::acc_code& c)
|
|
{ res.emplace_back(num_, c); });
|
|
return res;
|
|
}
|
|
|
|
std::pair<bool, acc_cond::mark_t>
|
|
acc_cond::sat_unsat_mark(bool sat) const
|
|
{
|
|
if (sat)
|
|
{
|
|
if (is_f())
|
|
return {false, mark_t({})};
|
|
if (!uses_fin_acceptance())
|
|
return {true, all_sets()};
|
|
}
|
|
else
|
|
{
|
|
if (is_t())
|
|
return {false, mark_t({})};
|
|
if (!uses_fin_acceptance())
|
|
return {true, mark_t({})};
|
|
}
|
|
|
|
auto used = code_.used_sets();
|
|
unsigned c = used.count();
|
|
unsigned max = used.max_set();
|
|
|
|
bdd_allocator ba;
|
|
int base = ba.allocate_variables(c);
|
|
assert(base == 0);
|
|
std::vector<bdd> r;
|
|
std::vector<unsigned> sets(c);
|
|
for (unsigned i = 0; r.size() < max; ++i)
|
|
{
|
|
if (used.has(i))
|
|
{
|
|
sets[base] = i;
|
|
r.emplace_back(bdd_ithvar(base++));
|
|
}
|
|
else
|
|
{
|
|
r.emplace_back(bddfalse);
|
|
}
|
|
}
|
|
|
|
bdd res = to_bdd_rec(&code_.back(), &r[0]);
|
|
|
|
if (res == bddtrue)
|
|
return {sat, mark_t({})};
|
|
if (res == bddfalse)
|
|
return {!sat, mark_t({})};
|
|
|
|
bdd cube = bdd_satone(sat ? res : !res);
|
|
mark_t i = {};
|
|
while (cube != bddtrue)
|
|
{
|
|
// The acceptance set associated to this BDD variable
|
|
int s = sets[bdd_var(cube)];
|
|
|
|
bdd h = bdd_high(cube);
|
|
if (h == bddfalse) // Negative variable? -> skip
|
|
{
|
|
cube = bdd_low(cube);
|
|
}
|
|
else // Positive variable? -> Inf
|
|
{
|
|
i.set(s);
|
|
cube = h;
|
|
}
|
|
}
|
|
return {true, i};
|
|
}
|
|
|
|
std::vector<std::vector<int>>
|
|
acc_cond::acc_code::missing(mark_t inf, bool accepting) const
|
|
{
|
|
if (empty())
|
|
{
|
|
if (accepting)
|
|
return {};
|
|
else
|
|
return {
|
|
{}
|
|
};
|
|
}
|
|
auto used = acc_cond::acc_code::used_sets();
|
|
unsigned c = used.count();
|
|
unsigned max = used.max_set();
|
|
|
|
bdd_allocator ba;
|
|
int base = ba.allocate_variables(c);
|
|
assert(base == 0);
|
|
std::vector<bdd> r;
|
|
std::vector<unsigned> sets(c);
|
|
bdd known = bddtrue;
|
|
for (unsigned i = 0; r.size() < max; ++i)
|
|
{
|
|
if (used.has(i))
|
|
{
|
|
sets[base] = i;
|
|
bdd v = bdd_ithvar(base++);
|
|
r.emplace_back(v);
|
|
if (inf.has(i))
|
|
known &= v;
|
|
}
|
|
else
|
|
{
|
|
r.emplace_back(bddfalse);
|
|
}
|
|
}
|
|
|
|
bdd res = to_bdd_rec(&back(), &r[0]);
|
|
|
|
res = bdd_restrict(res, known);
|
|
|
|
if (accepting)
|
|
res = !res;
|
|
|
|
if (res == bddfalse)
|
|
return {};
|
|
|
|
minato_isop isop(res);
|
|
bdd cube;
|
|
std::vector<std::vector<int>> result;
|
|
while ((cube = isop.next()) != bddfalse)
|
|
{
|
|
std::vector<int> partial;
|
|
while (cube != bddtrue)
|
|
{
|
|
// The acceptance set associated to this BDD variable
|
|
int s = sets[bdd_var(cube)];
|
|
|
|
bdd h = bdd_high(cube);
|
|
if (h == bddfalse) // Negative variable
|
|
{
|
|
partial.emplace_back(s);
|
|
cube = bdd_low(cube);
|
|
}
|
|
else // Positive variable
|
|
{
|
|
partial.emplace_back(-s - 1);
|
|
cube = h;
|
|
}
|
|
}
|
|
result.emplace_back(std::move(partial));
|
|
}
|
|
return result;
|
|
}
|
|
|
|
bool acc_cond::acc_code::is_dnf() const
|
|
{
|
|
if (empty() || size() == 2)
|
|
return true;
|
|
auto pos = &back();
|
|
auto start = &front();
|
|
auto and_scope = pos + 1;
|
|
if (pos->sub.op == acc_cond::acc_op::Or)
|
|
--pos;
|
|
while (pos > start)
|
|
{
|
|
switch (pos->sub.op)
|
|
{
|
|
case acc_cond::acc_op::Or:
|
|
return false;
|
|
case acc_cond::acc_op::And:
|
|
and_scope = std::min(and_scope, pos - pos->sub.size);
|
|
--pos;
|
|
break;
|
|
case acc_cond::acc_op::Fin:
|
|
case acc_cond::acc_op::FinNeg:
|
|
if (pos[-1].mark.count() > 1 && pos > and_scope)
|
|
return false;
|
|
SPOT_FALLTHROUGH;
|
|
case acc_cond::acc_op::Inf:
|
|
case acc_cond::acc_op::InfNeg:
|
|
pos -= 2;
|
|
break;
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
|
|
bool acc_cond::acc_code::is_cnf() const
|
|
{
|
|
if (empty() || size() == 2)
|
|
return true;
|
|
auto pos = &back();
|
|
auto start = &front();
|
|
auto or_scope = pos + 1;
|
|
if (pos->sub.op == acc_cond::acc_op::And)
|
|
--pos;
|
|
while (pos > start)
|
|
{
|
|
switch (pos->sub.op)
|
|
{
|
|
case acc_cond::acc_op::And:
|
|
return false;
|
|
case acc_cond::acc_op::Or:
|
|
or_scope = std::min(or_scope, pos - pos->sub.size);
|
|
--pos;
|
|
break;
|
|
case acc_cond::acc_op::Inf:
|
|
case acc_cond::acc_op::InfNeg:
|
|
if (pos[-1].mark.count() > 1 && pos > or_scope)
|
|
return false;
|
|
SPOT_FALLTHROUGH;
|
|
case acc_cond::acc_op::Fin:
|
|
case acc_cond::acc_op::FinNeg:
|
|
pos -= 2;
|
|
break;
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
|
|
namespace
|
|
{
|
|
acc_cond::acc_code complement_rec(const acc_cond::acc_word* pos)
|
|
{
|
|
auto start = pos - pos->sub.size;
|
|
switch (pos->sub.op)
|
|
{
|
|
case acc_cond::acc_op::And:
|
|
{
|
|
--pos;
|
|
auto res = acc_cond::acc_code::f();
|
|
do
|
|
{
|
|
auto tmp = complement_rec(pos) | std::move(res);
|
|
std::swap(tmp, res);
|
|
pos -= pos->sub.size + 1;
|
|
}
|
|
while (pos > start);
|
|
return res;
|
|
}
|
|
case acc_cond::acc_op::Or:
|
|
{
|
|
--pos;
|
|
auto res = acc_cond::acc_code::t();
|
|
do
|
|
{
|
|
auto tmp = complement_rec(pos) & std::move(res);
|
|
std::swap(tmp, res);
|
|
pos -= pos->sub.size + 1;
|
|
}
|
|
while (pos > start);
|
|
return res;
|
|
}
|
|
case acc_cond::acc_op::Fin:
|
|
return acc_cond::acc_code::inf(pos[-1].mark);
|
|
case acc_cond::acc_op::Inf:
|
|
return acc_cond::acc_code::fin(pos[-1].mark);
|
|
case acc_cond::acc_op::FinNeg:
|
|
return acc_cond::acc_code::inf_neg(pos[-1].mark);
|
|
case acc_cond::acc_op::InfNeg:
|
|
return acc_cond::acc_code::fin_neg(pos[-1].mark);
|
|
}
|
|
SPOT_UNREACHABLE();
|
|
return {};
|
|
}
|
|
}
|
|
|
|
acc_cond::acc_code acc_cond::acc_code::complement() const
|
|
{
|
|
if (is_t())
|
|
return acc_cond::acc_code::f();
|
|
return complement_rec(&back());
|
|
}
|
|
|
|
namespace
|
|
{
|
|
static acc_cond::acc_code
|
|
strip_rec(const acc_cond::acc_word* pos, acc_cond::mark_t rem, bool missing,
|
|
bool strip)
|
|
{
|
|
auto start = pos - pos->sub.size;
|
|
switch (pos->sub.op)
|
|
{
|
|
case acc_cond::acc_op::And:
|
|
{
|
|
--pos;
|
|
auto res = acc_cond::acc_code::t();
|
|
do
|
|
{
|
|
auto tmp = strip_rec(pos, rem, missing, strip) & std::move(res);
|
|
std::swap(tmp, res);
|
|
pos -= pos->sub.size + 1;
|
|
}
|
|
while (pos > start);
|
|
return res;
|
|
}
|
|
case acc_cond::acc_op::Or:
|
|
{
|
|
--pos;
|
|
auto res = acc_cond::acc_code::f();
|
|
do
|
|
{
|
|
auto tmp = strip_rec(pos, rem, missing, strip) | std::move(res);
|
|
std::swap(tmp, res);
|
|
pos -= pos->sub.size + 1;
|
|
}
|
|
while (pos > start);
|
|
return res;
|
|
}
|
|
case acc_cond::acc_op::Fin:
|
|
if (missing && (pos[-1].mark & rem))
|
|
return acc_cond::acc_code::t();
|
|
return acc_cond::acc_code::fin(strip
|
|
? pos[-1].mark.strip(rem)
|
|
: pos[-1].mark - rem);
|
|
case acc_cond::acc_op::Inf:
|
|
if (missing && (pos[-1].mark & rem))
|
|
return acc_cond::acc_code::f();
|
|
return acc_cond::acc_code::inf(strip
|
|
? pos[-1].mark.strip(rem)
|
|
: pos[-1].mark - rem);
|
|
case acc_cond::acc_op::FinNeg:
|
|
case acc_cond::acc_op::InfNeg:
|
|
SPOT_UNREACHABLE();
|
|
return {};
|
|
}
|
|
SPOT_UNREACHABLE();
|
|
return {};
|
|
}
|
|
|
|
static acc_cond::acc_code
|
|
force_inf_rec(const acc_cond::acc_word* pos, acc_cond::mark_t rem)
|
|
{
|
|
auto start = pos - pos->sub.size;
|
|
switch (pos->sub.op)
|
|
{
|
|
case acc_cond::acc_op::And:
|
|
{
|
|
--pos;
|
|
auto res = acc_cond::acc_code::t();
|
|
do
|
|
{
|
|
auto tmp = force_inf_rec(pos, rem) & std::move(res);
|
|
std::swap(tmp, res);
|
|
pos -= pos->sub.size + 1;
|
|
}
|
|
while (pos > start);
|
|
return res;
|
|
}
|
|
case acc_cond::acc_op::Or:
|
|
{
|
|
--pos;
|
|
auto res = acc_cond::acc_code::f();
|
|
do
|
|
{
|
|
auto tmp = force_inf_rec(pos, rem) | std::move(res);
|
|
std::swap(tmp, res);
|
|
pos -= pos->sub.size + 1;
|
|
}
|
|
while (pos > start);
|
|
return res;
|
|
}
|
|
case acc_cond::acc_op::Fin:
|
|
return acc_cond::acc_code::fin(pos[-1].mark - rem);
|
|
case acc_cond::acc_op::Inf:
|
|
return acc_cond::acc_code::inf(pos[-1].mark);
|
|
case acc_cond::acc_op::FinNeg:
|
|
case acc_cond::acc_op::InfNeg:
|
|
SPOT_UNREACHABLE();
|
|
return {};
|
|
}
|
|
SPOT_UNREACHABLE();
|
|
return {};
|
|
}
|
|
}
|
|
|
|
acc_cond::acc_code
|
|
acc_cond::acc_code::strip(acc_cond::mark_t rem, bool missing) const
|
|
{
|
|
if (is_t() || is_f())
|
|
return *this;
|
|
return strip_rec(&back(), rem, missing, true);
|
|
}
|
|
|
|
acc_cond::acc_code
|
|
acc_cond::acc_code::remove(acc_cond::mark_t rem, bool missing) const
|
|
{
|
|
if (is_t() || is_f())
|
|
return *this;
|
|
return strip_rec(&back(), rem, missing, false);
|
|
}
|
|
|
|
acc_cond::acc_code
|
|
acc_cond::acc_code::force_inf(mark_t rem) const
|
|
{
|
|
if (is_t() || is_f())
|
|
return *this;
|
|
return force_inf_rec(&back(), rem);
|
|
}
|
|
|
|
acc_cond::mark_t
|
|
acc_cond::acc_code::used_sets() const
|
|
{
|
|
if (is_t() || is_f())
|
|
return {};
|
|
acc_cond::mark_t used_in_cond = {};
|
|
auto pos = &back();
|
|
auto end = &front();
|
|
while (pos > end)
|
|
{
|
|
switch (pos->sub.op)
|
|
{
|
|
case acc_cond::acc_op::And:
|
|
case acc_cond::acc_op::Or:
|
|
--pos;
|
|
break;
|
|
case acc_cond::acc_op::Fin:
|
|
case acc_cond::acc_op::Inf:
|
|
case acc_cond::acc_op::FinNeg:
|
|
case acc_cond::acc_op::InfNeg:
|
|
used_in_cond |= pos[-1].mark;
|
|
pos -= 2;
|
|
break;
|
|
}
|
|
}
|
|
return used_in_cond;
|
|
}
|
|
|
|
std::pair<acc_cond::mark_t, acc_cond::mark_t>
|
|
acc_cond::acc_code::used_inf_fin_sets() const
|
|
{
|
|
if (is_t() || is_f())
|
|
return {mark_t({}), mark_t({})};
|
|
|
|
acc_cond::mark_t used_fin = {};
|
|
acc_cond::mark_t used_inf = {};
|
|
auto pos = &back();
|
|
auto end = &front();
|
|
while (pos > end)
|
|
{
|
|
switch (pos->sub.op)
|
|
{
|
|
case acc_cond::acc_op::And:
|
|
case acc_cond::acc_op::Or:
|
|
--pos;
|
|
break;
|
|
case acc_cond::acc_op::Fin:
|
|
case acc_cond::acc_op::FinNeg:
|
|
used_fin |= pos[-1].mark;
|
|
pos -= 2;
|
|
break;
|
|
case acc_cond::acc_op::Inf:
|
|
case acc_cond::acc_op::InfNeg:
|
|
used_inf |= pos[-1].mark;
|
|
pos -= 2;
|
|
break;
|
|
}
|
|
}
|
|
return {used_inf, used_fin};
|
|
}
|
|
|
|
std::ostream&
|
|
acc_cond::acc_code::to_html(std::ostream& os,
|
|
std::function<void(std::ostream&, int)>
|
|
set_printer) const
|
|
{
|
|
if (empty())
|
|
os << 't';
|
|
else
|
|
print_code<HTML>(os, *this, size() - 1,
|
|
set_printer ? set_printer : default_set_printer);
|
|
return os;
|
|
}
|
|
|
|
std::ostream&
|
|
acc_cond::acc_code::to_text(std::ostream& os,
|
|
std::function<void(std::ostream&, int)>
|
|
set_printer) const
|
|
{
|
|
if (empty())
|
|
os << 't';
|
|
else
|
|
print_code<TEXT>(os, *this, size() - 1,
|
|
set_printer ? set_printer : default_set_printer);
|
|
return os;
|
|
}
|
|
|
|
std::ostream&
|
|
acc_cond::acc_code::to_latex(std::ostream& os,
|
|
std::function<void(std::ostream&, int)>
|
|
set_printer) const
|
|
{
|
|
if (empty())
|
|
os << "\\mathsf{t}";
|
|
else
|
|
print_code<LATEX>(os, *this, size() - 1,
|
|
set_printer ? set_printer : default_set_printer);
|
|
return os;
|
|
}
|
|
|
|
|
|
std::ostream& operator<<(std::ostream& os,
|
|
const spot::acc_cond::acc_code& code)
|
|
{
|
|
return code.to_text(os);
|
|
}
|
|
|
|
|
|
/// Return the name of this acceptance condition, in the
|
|
/// specified format.
|
|
std::string acc_cond::name(const char* fmt) const
|
|
{
|
|
bool accentuated = false;
|
|
bool no_extra_param = false;
|
|
bool no_main_param = false;
|
|
bool no_parity_param = false;
|
|
bool abbreviate = false;
|
|
bool like_names = false;
|
|
bool other = false;
|
|
|
|
if (fmt)
|
|
while (*fmt)
|
|
switch (char c = *fmt++)
|
|
{
|
|
case '0': // no param style
|
|
no_extra_param = no_main_param = no_parity_param = true;
|
|
break;
|
|
case 'a':
|
|
accentuated = true;
|
|
break;
|
|
case 'b':
|
|
abbreviate = true;
|
|
break;
|
|
case 'd': // print_dot() style
|
|
accentuated = no_extra_param = abbreviate = like_names = true;
|
|
break;
|
|
case 'g':
|
|
no_extra_param = true;
|
|
break;
|
|
case 'l':
|
|
like_names = true;
|
|
break;
|
|
case 'm':
|
|
no_main_param = true;
|
|
break;
|
|
case 'p':
|
|
no_parity_param = true;
|
|
break;
|
|
case 'o':
|
|
other = true;
|
|
break;
|
|
case 's':
|
|
other = no_extra_param = no_main_param = no_parity_param =
|
|
like_names = true;
|
|
break;
|
|
default:
|
|
throw std::runtime_error
|
|
("unknown option for acc_cond::name(): "s + c);
|
|
}
|
|
|
|
std::ostringstream os;
|
|
|
|
auto gen = [abbreviate]()
|
|
{
|
|
return abbreviate ? "gen. " : "generalized-";
|
|
};
|
|
auto sets = [no_main_param, this]() -> std::string
|
|
{
|
|
return no_main_param ? "" : " " + std::to_string(num_sets());
|
|
};
|
|
|
|
if (is_generalized_buchi())
|
|
{
|
|
if (is_all())
|
|
os << "all";
|
|
else if (is_buchi())
|
|
os << (accentuated ? "Büchi" : "Buchi");
|
|
else
|
|
os << gen() << (accentuated ? "Büchi" : "Buchi") << sets();
|
|
}
|
|
else if (is_generalized_co_buchi())
|
|
{
|
|
if (is_none())
|
|
os << "none";
|
|
else if (is_co_buchi())
|
|
os << (accentuated ? "co-Büchi" : "co-Buchi");
|
|
else
|
|
os << gen() << (accentuated ? "co-Büchi" : "co-Buchi") << sets();
|
|
}
|
|
else
|
|
{
|
|
int r = is_rabin();
|
|
assert(r != 0);
|
|
if (r > 0)
|
|
{
|
|
os << "Rabin";
|
|
if (!no_main_param)
|
|
os << ' ' << r;
|
|
}
|
|
else
|
|
{
|
|
r = is_streett();
|
|
assert(r != 0);
|
|
if (r > 0)
|
|
{
|
|
os << "Streett";
|
|
if (!no_main_param)
|
|
os << ' ' << r;
|
|
}
|
|
else
|
|
{
|
|
std::vector<unsigned> pairs;
|
|
if (is_generalized_rabin(pairs))
|
|
{
|
|
os << gen() << "Rabin";
|
|
if (!no_main_param)
|
|
{
|
|
os << ' ' << pairs.size();
|
|
if (!no_extra_param)
|
|
for (auto p: pairs)
|
|
os << ' ' << p;
|
|
}
|
|
}
|
|
else if (is_generalized_streett(pairs))
|
|
{
|
|
os << gen() << "Streett";
|
|
if (!no_main_param)
|
|
{
|
|
os << ' ' << pairs.size();
|
|
if (!no_extra_param)
|
|
for (auto p: pairs)
|
|
os << ' ' << p;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
bool max = false;
|
|
bool odd = false;
|
|
if (is_parity(max, odd))
|
|
{
|
|
os << "parity";
|
|
if (!no_parity_param)
|
|
os << (max ? " max" : " min")
|
|
<< (odd ? " odd" : " even");
|
|
os << sets();
|
|
}
|
|
else if (like_names)
|
|
{
|
|
if (!uses_fin_acceptance())
|
|
{
|
|
os << "Fin-less" << sets();
|
|
}
|
|
else
|
|
{
|
|
std::vector<acc_cond::rs_pair> r_pairs;
|
|
bool r_like = is_rabin_like(r_pairs);
|
|
unsigned rsz = r_pairs.size();
|
|
std::vector<acc_cond::rs_pair> s_pairs;
|
|
bool s_like = is_streett_like(s_pairs);
|
|
unsigned ssz = s_pairs.size();
|
|
if (r_like && (!s_like || (rsz <= ssz)))
|
|
{
|
|
os << "Rabin-like";
|
|
if (!no_main_param)
|
|
os << ' ' << rsz;
|
|
}
|
|
else if (s_like && (!r_like || (ssz < rsz)))
|
|
{
|
|
os << "Streett-like";
|
|
if (!no_main_param)
|
|
os << ' ' << ssz;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
std::string res = os.str();
|
|
if (other && res.empty())
|
|
res = "other" + sets();
|
|
return res;
|
|
}
|
|
|
|
|
|
namespace
|
|
{
|
|
|
|
static void
|
|
syntax_error(const char* input, const char* message)
|
|
{
|
|
std::ostringstream s;
|
|
s << "syntax error at ";
|
|
if (*input)
|
|
s << '\'' << input << "': ";
|
|
else
|
|
s << "end of acceptance: ";
|
|
s << message;
|
|
throw parse_error(s.str());
|
|
}
|
|
|
|
/// acc ::= term | term "|" acc
|
|
/// term := "t" | "f" | "Inf" "(" num ")"
|
|
/// | "Fin" "(" num ") " | "(" acc ")
|
|
/// | term "&" term
|
|
|
|
static void skip_space(const char*& input)
|
|
{
|
|
while (std::isspace(*input))
|
|
++input;
|
|
}
|
|
|
|
// Eat c and remove the following spaces.
|
|
// Complain if there is no c.
|
|
void expect(const char*& input, char c)
|
|
{
|
|
if (*input != c)
|
|
{
|
|
char msg[20];
|
|
sprintf(msg, "was expecting %c '.'", c);
|
|
syntax_error(input, msg);
|
|
}
|
|
++input;
|
|
skip_space(input);
|
|
}
|
|
|
|
static acc_cond::acc_code parse_term(const char*& input);
|
|
|
|
static acc_cond::acc_code parse_acc(const char*& input)
|
|
{
|
|
auto res = parse_term(input);
|
|
skip_space(input);
|
|
while (*input == '|')
|
|
{
|
|
++input;
|
|
skip_space(input);
|
|
// Prepend instead of append, to preserve the input order.
|
|
auto tmp = parse_term(input);
|
|
std::swap(tmp, res);
|
|
res |= std::move(tmp);
|
|
}
|
|
return res;
|
|
}
|
|
|
|
static unsigned parse_num(const char*& input)
|
|
{
|
|
|
|
errno = 0;
|
|
char* end;
|
|
unsigned long n = strtoul(input, &end, 10);
|
|
unsigned num = n;
|
|
if (errno || num != n)
|
|
syntax_error(input, "invalid number.");
|
|
input = end;
|
|
return n;
|
|
}
|
|
|
|
static unsigned parse_range(const char*& str)
|
|
{
|
|
skip_space(str);
|
|
int min;
|
|
int max;
|
|
char* end;
|
|
errno = 0;
|
|
min = strtol(str, &end, 10);
|
|
if (end == str || errno)
|
|
{
|
|
// No leading number. It's OK as long as '..' or ':' are next.
|
|
if (errno || (*end != ':' && *end != '.'))
|
|
syntax_error(str, "invalid range.");
|
|
min = 1;
|
|
}
|
|
if (!*end || (*end != ':' && *end != '.'))
|
|
{
|
|
// Only one number.
|
|
max = min;
|
|
}
|
|
else
|
|
{
|
|
// Skip : or ..
|
|
if (end[0] == ':')
|
|
++end;
|
|
else if (end[0] == '.' && end[1] == '.')
|
|
end += 2;
|
|
|
|
// Parse the next integer.
|
|
char* end2;
|
|
max = strtol(end, &end2, 10);
|
|
if (end == end2 || errno)
|
|
syntax_error(str, "invalid range (missing end?)");
|
|
end = end2;
|
|
}
|
|
|
|
if (min < 0 || max < 0)
|
|
syntax_error(str, "values in range must be positive.");
|
|
|
|
str = end;
|
|
|
|
if (min == max)
|
|
return min;
|
|
|
|
if (min > max)
|
|
std::swap(min, max);
|
|
return spot::rrand(min, max);
|
|
}
|
|
|
|
static unsigned parse_par_num(const char*& input)
|
|
{
|
|
skip_space(input);
|
|
expect(input, '(');
|
|
unsigned num = parse_num(input);
|
|
skip_space(input);
|
|
expect(input, ')');
|
|
return num;
|
|
}
|
|
|
|
static double parse_proba(const char*& input)
|
|
{
|
|
errno = 0;
|
|
char* end;
|
|
double n = strtod(input, &end);
|
|
if (errno)
|
|
syntax_error(input, "cannot convert to double.");
|
|
if (!(n >= 0.0 && n <= 1.0))
|
|
syntax_error(input, "value should be between 0 and 1.");
|
|
input = end;
|
|
return n;
|
|
}
|
|
|
|
static acc_cond::acc_code parse_term(const char*& input)
|
|
{
|
|
acc_cond::acc_code res;
|
|
if (*input == 't')
|
|
{
|
|
++input;
|
|
res = acc_cond::acc_code::t();
|
|
}
|
|
else if (*input == 'f')
|
|
{
|
|
++input;
|
|
res = acc_cond::acc_code::f();
|
|
}
|
|
else if (*input == '(')
|
|
{
|
|
++input;
|
|
skip_space(input);
|
|
res = parse_acc(input);
|
|
skip_space(input);
|
|
expect(input, ')');
|
|
}
|
|
else if (!strncmp(input, "Inf", 3))
|
|
{
|
|
input += 3;
|
|
res = acc_cond::acc_code::inf({parse_par_num(input)});
|
|
}
|
|
else if (!strncmp(input, "Fin", 3))
|
|
{
|
|
input += 3;
|
|
res = acc_cond::acc_code::fin({parse_par_num(input)});
|
|
}
|
|
else
|
|
{
|
|
syntax_error(input, "unexpected character.");
|
|
}
|
|
|
|
skip_space(input);
|
|
while (*input == '&')
|
|
{
|
|
++input;
|
|
skip_space(input);
|
|
// Prepend instead of append, to preserve the input order.
|
|
auto tmp = parse_term(input);
|
|
std::swap(tmp, res);
|
|
res &= std::move(tmp);
|
|
}
|
|
return res;
|
|
}
|
|
|
|
static bool max_or_min(const char*& input)
|
|
{
|
|
skip_space(input);
|
|
if (!strncmp(input, "max", 3))
|
|
{
|
|
input += 3;
|
|
return true;
|
|
}
|
|
if (!strncmp(input, "min", 3))
|
|
{
|
|
input += 3;
|
|
return false;
|
|
}
|
|
if (!strncmp(input, "rand", 4))
|
|
{
|
|
input += 4;
|
|
return drand() < 0.5;
|
|
}
|
|
if (!strncmp(input, "random", 6))
|
|
{
|
|
input += 6;
|
|
return drand() < 0.5;
|
|
}
|
|
syntax_error(input, "expecting 'min', 'max', or 'rand'.");
|
|
SPOT_UNREACHABLE();
|
|
return false;
|
|
}
|
|
|
|
static bool odd_or_even(const char*& input)
|
|
{
|
|
skip_space(input);
|
|
if (!strncmp(input, "odd", 3))
|
|
{
|
|
input += 3;
|
|
return true;
|
|
}
|
|
if (!strncmp(input, "even", 4))
|
|
{
|
|
input += 4;
|
|
return false;
|
|
}
|
|
if (!strncmp(input, "rand", 4))
|
|
{
|
|
input += 4;
|
|
return drand() < 0.5;
|
|
}
|
|
if (!strncmp(input, "random", 6))
|
|
{
|
|
input += 6;
|
|
return drand() < 0.5;
|
|
}
|
|
syntax_error(input, "expecting 'odd', 'even', or 'rand'.");
|
|
SPOT_UNREACHABLE();
|
|
return false;
|
|
}
|
|
|
|
}
|
|
|
|
acc_cond::acc_code::acc_code(const char* input)
|
|
{
|
|
skip_space(input);
|
|
acc_cond::acc_code c;
|
|
if (!strncmp(input, "all", 3))
|
|
{
|
|
input += 3;
|
|
c = acc_cond::acc_code::t();
|
|
}
|
|
else if (!strncmp(input, "none", 4))
|
|
{
|
|
input += 4;
|
|
c = acc_cond::acc_code::f();
|
|
}
|
|
else if (!strncmp(input, "Buchi", 5))
|
|
{
|
|
input += 5;
|
|
c = acc_cond::acc_code::buchi();
|
|
}
|
|
else if (!strncmp(input, "co-Buchi", 8))
|
|
{
|
|
input += 8;
|
|
c = acc_cond::acc_code::cobuchi();
|
|
}
|
|
else if (!strncmp(input, "generalized-Buchi", 17))
|
|
{
|
|
input += 17;
|
|
c = acc_cond::acc_code::generalized_buchi(parse_range(input));
|
|
}
|
|
else if (!strncmp(input, "generalized-co-Buchi", 20))
|
|
{
|
|
input += 20;
|
|
c = acc_cond::acc_code::generalized_co_buchi(parse_range(input));
|
|
}
|
|
else if (!strncmp(input, "Rabin", 5))
|
|
{
|
|
input += 5;
|
|
c = acc_cond::acc_code::rabin(parse_range(input));
|
|
}
|
|
else if (!strncmp(input, "Streett", 7))
|
|
{
|
|
input += 7;
|
|
c = acc_cond::acc_code::streett(parse_range(input));
|
|
}
|
|
else if (!strncmp(input, "generalized-Rabin", 17))
|
|
{
|
|
input += 17;
|
|
unsigned num = parse_num(input);
|
|
std::vector<unsigned> v;
|
|
v.reserve(num);
|
|
while (num > 0)
|
|
{
|
|
v.emplace_back(parse_range(input));
|
|
--num;
|
|
}
|
|
c = acc_cond::acc_code::generalized_rabin(v.begin(), v.end());
|
|
}
|
|
else if (!strncmp(input, "parity", 6))
|
|
{
|
|
input += 6;
|
|
bool max = max_or_min(input);
|
|
bool odd = odd_or_even(input);
|
|
unsigned num = parse_range(input);
|
|
c = acc_cond::acc_code::parity(max, odd, num);
|
|
}
|
|
else if (!strncmp(input, "random", 6))
|
|
{
|
|
input += 6;
|
|
unsigned n = parse_range(input);
|
|
skip_space(input);
|
|
auto setreuse = input;
|
|
double reuse = (*input) ? parse_proba(input) : 0.0;
|
|
if (reuse >= 1.0)
|
|
syntax_error(setreuse, "probability for set reuse should be <1.");
|
|
c = acc_cond::acc_code::random(n, reuse);
|
|
}
|
|
else
|
|
{
|
|
c = parse_acc(input);
|
|
}
|
|
skip_space(input);
|
|
if (*input)
|
|
syntax_error(input, "unexpected character.");
|
|
|
|
std::swap(c, *this);
|
|
}
|
|
int acc_cond::acc_code::fin_one() const
|
|
{
|
|
if (empty() || is_f())
|
|
return -1;
|
|
const acc_cond::acc_word* pos = &back();
|
|
do
|
|
{
|
|
switch (pos->sub.op)
|
|
{
|
|
case acc_cond::acc_op::And:
|
|
case acc_cond::acc_op::Or:
|
|
--pos;
|
|
break;
|
|
case acc_cond::acc_op::Inf:
|
|
case acc_cond::acc_op::InfNeg:
|
|
case acc_cond::acc_op::FinNeg:
|
|
pos -= 2;
|
|
break;
|
|
case acc_cond::acc_op::Fin:
|
|
return pos[-1].mark.min_set() - 1;
|
|
}
|
|
}
|
|
while (pos >= &front());
|
|
return -1;
|
|
}
|
|
|
|
acc_cond::mark_t acc_cond::acc_code::fin_unit() const
|
|
{
|
|
mark_t res = {};
|
|
if (empty() || is_f())
|
|
return res;
|
|
const acc_cond::acc_word* pos = &back();
|
|
do
|
|
{
|
|
switch (pos->sub.op)
|
|
{
|
|
case acc_cond::acc_op::And:
|
|
--pos;
|
|
break;
|
|
case acc_cond::acc_op::Or:
|
|
pos -= pos->sub.size + 1;
|
|
break;
|
|
case acc_cond::acc_op::Inf:
|
|
case acc_cond::acc_op::InfNeg:
|
|
case acc_cond::acc_op::FinNeg:
|
|
pos -= 2;
|
|
break;
|
|
case acc_cond::acc_op::Fin:
|
|
auto m = pos[-1].mark;
|
|
if (m.count() == 1)
|
|
res |= m;
|
|
pos -= 2;
|
|
break;
|
|
}
|
|
}
|
|
while (pos >= &front());
|
|
return res;
|
|
}
|
|
}
|