relabel: introduce an overlapping relabeling version
Related to issue #500 and issue #536. * spot/tl/relabel.hh (relabel_overlapping_bse): New function. * spot/tl/relabel.cc: Implement it. * bin/ltlfilt.cc: Add a --relabel-overlapping-bool option. * tests/core/ltlfilt.test: Test it. * NEWS: Mention it.
This commit is contained in:
Alexandre Duret-Lutz
parent
14347cdc52
commit
18478e663f
5 changed files with 207 additions and 48 deletions
8
NEWS
8
NEWS
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@ -12,6 +12,10 @@ New in spot 2.11.6.dev (not yet released)
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autfilt input.hoa -o output-%l.hoa
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- ltlfilt has a new option --relabel-overlapping-bool=abc|pnn that
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will replace boolean subformulas by fresh atomic propositions even
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if those subformulas share atomic propositions.
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Library:
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- The following new trivial simplifications have been implemented for SEREs:
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@ -29,6 +33,10 @@ New in spot 2.11.6.dev (not yet released)
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- spot::bdd_to_cnf_formula() is a new variant of spot::bdd_to_formula()
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that converts a BDD into a CNF instead of a DNF.
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- spot::relabel_overlapping_bse() is a new function that will
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replace boolean subformulas by fresh atomic propositions even if
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those subformulas share atomic propositions.
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New in spot 2.11.6 (2023-08-01)
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Bug fixes:
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@ -94,6 +94,7 @@ enum {
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OPT_REJECT_WORD,
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OPT_RELABEL,
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OPT_RELABEL_BOOL,
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OPT_RELABEL_OVERLAP,
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OPT_REMOVE_WM,
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OPT_REMOVE_X,
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OPT_SAFETY,
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@ -139,8 +140,12 @@ static const argp_option options[] =
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"relabel all atomic propositions, alphabetically unless " \
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"specified otherwise", 0 },
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{ "relabel-bool", OPT_RELABEL_BOOL, "abc|pnn", OPTION_ARG_OPTIONAL,
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"relabel Boolean subexpressions, alphabetically unless " \
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"specified otherwise", 0 },
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"relabel Boolean subexpressions that do not share atomic propositions,"
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" relabel alphabetically unless specified otherwise", 0 },
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{ "relabel-overlapping-bool", OPT_RELABEL_OVERLAP, "abc|pnn",
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OPTION_ARG_OPTIONAL,
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"relabel Boolean subexpressions even if they share atomic propositions,"
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" relabel alphabetically unless specified otherwise", 0 },
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{ "define", OPT_DEFINE, "FILENAME", OPTION_ARG_OPTIONAL,
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"when used with --relabel or --relabel-bool, output the relabeling map "
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"using #define statements", 0 },
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@ -316,7 +321,10 @@ static bool recurrence = false;
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static bool persistence = false;
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static range size = { -1, -1 };
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static range bsize = { -1, -1 };
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enum relabeling_mode { NoRelabeling = 0, ApRelabeling, BseRelabeling };
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enum relabeling_mode { NoRelabeling = 0,
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ApRelabeling,
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BseRelabeling,
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OverlappingRelabeling };
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static relabeling_mode relabeling = NoRelabeling;
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static spot::relabeling_style style = spot::Abc;
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static bool remove_x = false;
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@ -358,6 +366,19 @@ parse_formula_arg(const std::string& input)
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return pf.f;
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}
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static void
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parse_relabeling_style(const char* arg, const char* optname)
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{
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if (!arg || !strncasecmp(arg, "abc", 6))
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style = spot::Abc;
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else if (!strncasecmp(arg, "pnn", 4))
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style = spot::Pnn;
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else
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error(2, 0, "invalid argument for --relabel%s: '%s'\n"
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"expecting 'abc' or 'pnn'", optname, arg);
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}
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static int
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parse_opt(int key, char* arg, struct argp_state*)
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{
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@ -500,16 +521,16 @@ parse_opt(int key, char* arg, struct argp_state*)
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}
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break;
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case OPT_RELABEL:
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relabeling = ApRelabeling;
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parse_relabeling_style(arg, "");
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break;
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case OPT_RELABEL_BOOL:
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relabeling = (key == OPT_RELABEL_BOOL ? BseRelabeling : ApRelabeling);
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if (!arg || !strncasecmp(arg, "abc", 6))
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style = spot::Abc;
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else if (!strncasecmp(arg, "pnn", 4))
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style = spot::Pnn;
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else
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error(2, 0, "invalid argument for --relabel%s: '%s'",
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(key == OPT_RELABEL_BOOL ? "-bool" : ""),
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arg);
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relabeling = BseRelabeling;
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parse_relabeling_style(arg, "-bool");
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break;
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case OPT_RELABEL_OVERLAP:
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relabeling = OverlappingRelabeling;
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parse_relabeling_style(arg, "-overlapping-bool");
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break;
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case OPT_REMOVE_WM:
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unabbreviate += "MW";
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@ -701,6 +722,12 @@ namespace
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f = spot::relabel_bse(f, style, &relmap);
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break;
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}
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case OverlappingRelabeling:
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{
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relmap.clear();
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f = spot::relabel_overlapping_bse(f, style, &relmap);
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break;
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}
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case NoRelabeling:
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break;
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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) 2012-2016, 2018-2020, 2022 Laboratoire de Recherche et
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// Copyright (C) 2012-2016, 2018-2020, 2022, 2023 Laboratoire de Recherche et
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// Développement de l'Epita (LRDE).
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//
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// This file is part of Spot, a model checking library.
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@ -80,7 +80,9 @@ namespace spot
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}
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};
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// if subexp == false, matches APs
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// if subexp == true, matches boolean subexps
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template <bool subexp>
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class relabeler
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{
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public:
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@ -101,40 +103,62 @@ namespace spot
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formula rename(formula old)
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{
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if constexpr (subexp)
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{
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// have we given a name to the negation of this formula?
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auto neg = newname.find(formula::Not(old));
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if (neg != newname.end())
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return formula::Not(neg->second);
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}
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auto r = newname.emplace(old, nullptr);
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if (!r.second)
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{
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return r.first->second;
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}
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else
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{
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formula res = gen->next();
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r.first->second = res;
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if (oldnames)
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(*oldnames)[res] = old;
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return res;
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}
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}
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formula
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visit(formula f)
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{
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if (f.is(op::ap))
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if ((!subexp && f.is(op::ap))
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|| (subexp && f.is_boolean()))
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{
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return rename(f);
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}
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if (subexp && f.is(op::Or, op::And) && f[0].is_boolean())
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{
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// Boolean terms are always beginning of And and Or, so
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// the above test capture Or/And that some Boolean arguments
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// and some non-Boolean arguments.
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unsigned i = 0;
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formula b = f.boolean_operands(&i);
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unsigned sz = f.size();
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std::vector<formula> res;
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res.reserve(sz - i + 1);
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res.emplace_back(visit(b));
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for (; i < sz; ++i)
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res.emplace_back(visit(f[i]));
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return formula::multop(f.kind(), res);
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}
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else
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{
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return f.map([this](formula f)
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{
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return this->visit(f);
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});
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}
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}
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};
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}
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template<bool subexp>
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formula
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relabel(formula f, relabeling_style style, relabeling_map* m)
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relabel_do(formula f, relabeling_style style, relabeling_map* m)
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{
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ap_generator* gen = nullptr;
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switch (style)
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@ -147,9 +171,22 @@ namespace spot
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break;
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}
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relabeler r(gen, m);
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relabeler<subexp> r(gen, m);
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return r.visit(f);
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}
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}
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formula
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relabel(formula f, relabeling_style style, relabeling_map* m)
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{
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return relabel_do<false>(f, style, m);
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}
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formula
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relabel_overlapping_bse(formula f, relabeling_style style, relabeling_map* m)
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{
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return relabel_do<true>(f, style, m);
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}
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namespace
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{
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@ -502,7 +539,7 @@ namespace spot
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}
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class bse_relabeler final: public relabeler
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class bse_relabeler final: public relabeler<false>
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{
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public:
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const fset& c;
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@ -1,5 +1,5 @@
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// -*- coding: utf-8 -*-
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// Copyright (C) 2012, 2013, 2015, 2019 Laboratoire de Recherche et
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// Copyright (C) 2012, 2013, 2015, 2019, 2023 Laboratoire de Recherche et
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// Développement de l'Epita (LRDE).
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//
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// This file is part of Spot, a model checking library.
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@ -34,6 +34,9 @@ namespace spot
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///
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/// If \a m is non-null, it is filled with correspondence
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/// between the new names (keys) and the old names (values).
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///
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/// \see relabel_bse
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/// \see relabel_overlaping_bse
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SPOT_API
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formula relabel(formula f, relabeling_style style,
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relabeling_map* m = nullptr);
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@ -45,9 +48,27 @@ namespace spot
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///
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/// If \a m is non-null, it is filled with correspondence
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/// between the new names (keys) and the old names (values).
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///
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/// The relabel_overlapping_bse() will introduce a new atomic
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/// proposition for each maximal Boolean subexpression encountered,
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/// even if they overlap (i.e., share common atomic
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/// propositions). For instance `(a & b & c) U (c & d & e)` will be
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/// simply be relabeled as `p0 U p1`. This kind of renaming to not
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/// preserves the
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///
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/// The relabel_bse() version will make sure that the replaced
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/// subexpressions do not share atomic propositions. For instance
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/// `(a & b & c) U (c & d & e)` will be simply be relabeled as
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/// `(p0 & p1) U (p1 & p2)`, were `p1` replaces `c` and the rest
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/// is obvious.
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///
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/// @{
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SPOT_API
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formula relabel_bse(formula f, relabeling_style style,
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relabeling_map* m = nullptr);
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SPOT_API formula
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relabel_overlapping_bse(formula f, relabeling_style style, relabeling_map* m);
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// @}
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/// \ingroup tl_rewriting
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/// \brief Replace atomic propositions of \a f by subformulas
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@ -1,7 +1,7 @@
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#! /bin/sh
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# -*- coding: utf-8 -*-
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# Copyright (C) 2013-2020, 2022 Laboratoire de Recherche et Développement de
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# l'Epita (LRDE).
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# Copyright (C) 2013-2020, 2022, 2023 Laboratoire de Recherche et
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# Développement de l'Epita (LRDE).
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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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@ -361,6 +361,8 @@ G(d & e) | FG(Xf| !c) | h | i
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b & !Xc & e & (f | g)
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b & GF(a | c) & !GF!(a | c)
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F(a <-> b) -> (c xor d)
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(a & b & c) U (c & d & e)
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(a & b & c) U !(a & b & c)
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EOF
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cat >exp <<EOF
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@ -369,6 +371,8 @@ p0 & p1 & GF(p0 | p2) & FG(p0 | p2)
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p0 & GFp1 & FGp1
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p0 | Gp1 | FG(p2 | Xp3)
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p0 | Gp1
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(p0 & p1) U (p1 & p2)
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(p0 & p1 & p2) U (!p0 | !p1 | !p2)
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EOF
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run 0 ltlfilt -u --nnf --relabel-bool=pnn in >out
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@ -393,6 +397,14 @@ p0 || []p1 || <>[](p2 || Xp3)
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#define p0 ((c && !d) || (!c && d))
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#define p1 ((a && !b) || (!a && b))
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p0 || []p1
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#define p0 (a && b)
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#define p1 (c)
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#define p2 (d && e)
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(p0 && p1) U (p1 && p2)
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#define p0 (a)
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#define p1 (b)
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#define p2 (c)
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(p0 && p1 && p2) U (!p0 || !p1 || !p2)
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EOF
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run 0 ltlfilt -s -u --nnf --relabel-bool=pnn --define in >out
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@ -433,11 +445,53 @@ p0 && []<>(p1 || p2) && ![]<>!(p1 || p2)
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#define p2 (c)
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#define p3 (d)
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<>(p0 <-> p1) -> !(p2 <-> p3)
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#define p0 (a)
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#define p1 (b)
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#define p2 (c)
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#define p3 (d)
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#define p4 (e)
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(p0 && p1 && p2) U (p2 && p3 && p4)
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#define p0 (a)
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#define p1 (b)
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#define p2 (c)
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(p0 && p1 && p2) U !(p0 && p1 && p2)
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EOF
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run 0 ltlfilt -s -u --relabel=pnn --define in >out
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diff exp out
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cat >exp <<EOF
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#define p0 (a & c)
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#define p1 (b)
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p0 & Xp1
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#define p0 (a & b)
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#define p1 (a | c)
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p0 & GFp1 & FGp1
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#define p0 (h | i)
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#define p1 (d & e)
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#define p2 (!c)
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#define p3 (f)
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p0 | Gp1 | FG(p2 | Xp3)
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#define p0 (b & e & (f | g))
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#define p1 (c)
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p0 & !Xp1
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#define p0 (b)
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#define p1 (a | c)
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p0 & GFp1 & !GF!p1
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#define p0 (a <-> b)
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#define p1 (c xor d)
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Fp0 -> p1
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#define p0 (a & b & c)
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#define p1 (c & d & e)
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p0 U p1
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#define p0 (a & b & c)
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p0 U !p0
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EOF
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run 0 ltlfilt -u --relabel-over=pnn --define in >out
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diff exp out
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toolong='((p2=0) * (p3=1))' # work around the 80-col check
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cat >exp <<EOF
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#define p0 (a=1)
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@ -470,6 +524,16 @@ cat >exp <<EOF
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#define p2 (a=1)
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#define p3 (b=1)
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((p0=1) * (p1=0)) + ((p0=0) * (p1=1)) + (G(((p2=1) * (p3=0)) + $toolong))
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#define p0 (a=1)
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#define p1 (b=1)
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#define p2 (c=1)
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#define p3 (d=1)
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#define p4 (e=1)
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((p0=1) * (p1=1) * (p2=1)) U ((p2=1) * (p3=1) * (p4=1))
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#define p0 (a=1)
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#define p1 (b=1)
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#define p2 (c=1)
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((p0=1) * (p1=1) * (p2=1)) U ((p0=0) + (p1=0) + (p2=0))
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EOF
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run 0 ltlfilt -p --wring -u --nnf --relabel=pnn --define in >out
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diff exp out
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@ -484,6 +548,8 @@ h | i | G(d & e) | FG(!c | Xf)@
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b & e & (f | g) & !Xc@
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b & GF(a | c) & !GF!(a | c)@
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F(a <-> b) -> (c xor d)@
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(a & b & c) U (c & d & e)@
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(a & b & c) U !(a & b & c)@
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EOF
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diff exp out
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