ChangeLog 380 KB
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2011-08-28  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Fix errors reported by clang++-2.9.

	* src/evtgbaalgos/tgba2evtgba.cc (process_link): Fix prototype
	to match tgba_reachable_iterator::process_link.
	* src/ltlvisit/tunabbrev.hh: Add using super::visit, so that the
	other visit() method are in scope when we overload one.
	* src/tgba/tgbareduc.hh, src/tgba/tgbareduc.cc (start, end,
	process_link): Remove these empty methods.  The default
	implementations are empty too, and process_link had the
	wrong prototype.
	* src/tgbaalgos/reductgba_sim.hh, src/tgbaalgos/reductgba_sim.cc
	(start, end, process_link): Likewise.

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2011-08-27  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Improve SCC simplification by removing implied acceptance conditions.

	Spot 0.7.1 used to need 190 acceptance conditions to translate the
	188 literature formulae.  With this patch we are down to 185.
	That's not an impressive, but there are only ~20 formulae that
	require more than 1 acceptance conditions; hence little room for
	improvement.

	* src/misc/bddlt.hh (bdd_hash): New function.
	* src/misc/accconv.hh, src/misc/accconv.cc: New files.
	* src/misc/Makefile.am: Add them.
	* src/tgbaalgos/scc.cc (scc_map::build_map): Adjust
	to record all combination of acceptance conditions occurring in a SCC.
	* src/tgbaalgos/scc.hh (scc_map::scc::useful_acc): Update description.
	* src/tgbaalgos/sccfilter.cc (scc_filter): Simplify acceptance
	conditions that are always implied by another acceptance
	conditions.  Previously, we only removed acceptance conditions
	that where always present in accepting SCCs.
	* src/tgbatest/sccsimpl.test: New file.
	* src/tgbatest/Makefile.am (TESTS): Add it.

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2011-08-26  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Refine yesterday's change to the degeneralization.

	This avoids a small regression on the size of degeneralized
	automata of our usual list of literature formulae.

	* src/tgba/tgbatba.hh, src/tgba/tgbatba.cc
	(tgba_tba_proxy::union_acceptance_conditions_of_original_state):
	New method.
	* src/tgba/tgbatba.cc (tgba_tba_proxy_succ_iterator): In accepting
	states, ignore only the last expected acceptance condition if its
	common to all outgoing transitions AND if it is not used by any
	outgoing transitions of the destination.

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2011-08-25  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Make sure the degeneralization is idempotent (up to renaming of
	states).

	* src/tgbaalgos/tgbatba.cc: When degeneralizing to SBA, remove the
	acceptance conditions that are common to all outgoing transitions
	of this state.  This helps to make the degeneralization
	idempotent.
	* src/tgbatest/degenid.test: New test case.
	* src/tgbatest/Makefile.am: Add it.

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2011-08-25  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Fix escaping of state name in save_reachable()'s output.

	* src/tgbaalgos/save.c (process_state): Escape quotes in the
	name of source and destination states.  This fixes a side bug
	in the upcoming degenid.test test case.

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2011-08-25  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Running `ltl2tgba -R1q -R1t -N` would degeneralize before and
	after the simulation-reduction.

	Report from Tomáš Babiak <xbabiak@fi.muni.cz>.

	* src/tgbaalgos/neverclaim.hh (never_claim_reachable): Take
	a tgba as input.
	* src/tgbaalgos/neverclaim.cc (never_claim_bfs): Call
	state_is_accepting() only if this tgba turns out to be
	a tgba_sba_proxy.  Otherwise check the acceptance of one
	outgoing transition as we do in dotty_bfs since 2011-03-05.
	* src/tgbatest/ltl2tgba.cc: Do not redegeneralize before
	calling never_claim_reachable() if we know the automaton is
	degeneralized already.
	* src/tgbatest/ltl2tgba.test: Add a test case.

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2011-08-17  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Please GCC 4.6.

	* src/tgbatest/complementation.cc (check, automaton): Remove
	these unused variables.

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2011-08-17  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Fix a nondeterministic behavior of the degeneralization algorithm.

	Reported by Tomáš Babiak <xbabiak@fi.muni.cz>.

	* src/tgba/tgbatba.cc (tgba_tba_proxy): Replace the std::map used
	to record outgoing transitions by an Sgi::hash_map, and keep the
	order of these transitions in a separate list.
	* src/tgbatest/degendet.test: New file.
	* src/tgbatest/Makefile.am (TESTS): Add it.
	* THANKS: Add Tomáš and convert to utf8.

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2011-08-17  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	* src/tgbatest/ltl2tgba.cc (syntax): -N implies -DS, not -D.

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2011-07-26  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	* iface/dve2/dve2check.cc: Add option -W and simplify formulae.

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2011-07-26  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	-e means we expect an accepting run.

	* iface/dve2/dve2check.cc: Reverse the value of
	expect_counter_example with respect to the -e/-E options.
	* iface/dve2/dve2check.test: Swap -e and -E.

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2011-06-26  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Add some "drop shadow" in ltl2tgba.html.

	* wrap/python/ajax/ltl2tgba.html: Add shadow to all boxes.
	* wrap/python/ajax/css/ltl2tgba.css (.shadow): New class.

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2011-06-25  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Revamp the ltl2tgba benchmark.

	* bench/ltl2tgba/algorithms: Reduce the number of Spot configuration
	tested.
	* bench/ltl2tgba/Makefile.am (run, small.txt, big.txt, known.txt):
	New rules.
	* bench/ltl2tgba/big, bench/ltl2tgba/small, bench/ltl2tgba/known:
	Add a 15min timeout to the lbtt configuration.
	* bench/ltl2tgba/defs.in: Adjust variable definitions to accept
	variable inderections.
	* bench/ltl2tgba/parseout.pl: Add an option to output the table in
	LaTeX.  Also consider all formulae, not just the positive
	formulae.
	* bench/ltl2tgba/README: Update.

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2011-06-16  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	* src/ltlvisit/tostring.cc (to_spin_string_visitor): Add missing break.

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2011-06-10  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	* wrap/python/ajax/spot.in: Touch the directory containing
	the cached result for the requests.  So that it survives
	the browser's cache.
	(finish): Prune the cache only once per hour, and only eraes
	files that are older than 2 hours.

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2011-06-09  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	* wrap/python/ajax/ltl2tgba.html: Add focus on the formula field
	on page load.

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2011-06-08  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	* NEWS: Update with recent changes.

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2011-06-08  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Implement cache pruning in the CGI script.

	* wrap/python/ajax/spot.in (finish): Prune the cache once in a
	while.  We rely on hardlinks for garbage collecting the pictures
	and dot sources that may be shared by different requests.

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2011-06-08  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Cache dot sources in the CGI script.

	* wrap/python/ajax/spot.in (render_dot, render_dot_maybe)
	(render_automaton, render_formula): Cache the dot source, so that
	we do not have to regenerate two pictures from the same contents.
	* wrap/python/spot.i: Typo in the ostringstream declaration.

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2011-06-08  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Output a "Cache-Control:" header in the CGI script.

	* wrap/python/ajax/spot.in: Output a cache-control header, so that
	browsers do no even send two identical requests.

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2011-06-08  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Cache results of the spot.py CGI script.

	* wrap/python/ajax/spot.in: Use the QUERY_STRING as a hash key to
	cache the result of the script.  Open stdout without buffering and
	redirect it to a file that we can dump later on cache hits.  Parts
	of this change are extracted from code from Pierre Parutto
	<parutto@lrde.epita.fr>.
	* AUTHORS: Add him.

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2011-06-07  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	* src/ltltest/genltl.cc (X_n): Fix assertion.

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2011-06-06  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	* src/ltlvisit/dotty.cc (dotty_visitor): Reorder attributes.

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2011-06-06  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	* src/ltltest/genltl.cc (fair_response): Typo.

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2011-06-06  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	DVE2: Do not display state variables with only one possible value.

	* iface/dve2/dve2.cc (dve2_kripke::dve2_kripke): Fill
	a format_filter_ array with boolean indicating whether each
	variable should be printed.  Ignore variable with only one
	possible value.
	(dve2_kripke::~dve2_kripke): Destroy it.
	(dve2_kripke::format_state): Use it.
	* iface/dve2/finite.test: Adjust.

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2011-06-06  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Remove Kristin Rozier's LTLcounter.pl scripts, now that we can
	generate these formulae with "genltl".

	* src/tgbatest/ltlcounter/: Remove this directory.
	* src/tgbatest/Makefile.am: Adjust.
	* src/tgbatest/ltlcounter.test, bench/ltlcounter/run: Use genltl
	to generate the formulae.
	* bench/ltlcounter/README: Do not mention src/tgbatest/ltlcounter/
	anymore.

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2011-06-06  Alexandre Duret-Lutz  <adl@va-et-vient.net>

	Better layout of the LTL formula parse tree.

	* src/ltlvisit/dotty.cc: Display "L" and "R" tail-labels
	for binary operators.  Gather all constants and atomic
	propositions in a sub-graph with "rank=sink".

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2011-06-06  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Add more formula families to genltl.

	* src/ltltest/genltl.cc (fair_response, ltl_counter)
	(ltl_counter_carry): New functions, constructing function from
	gastin.03.cav and rozier.07.cav.  The LTL counter will replace the
	scripts in src/tgbatest/ltlcounter/.
	(X_n): New helper function.

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2011-06-03  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Install a misc/_config.h to hide all the defines that clutter the
	built output.

	This is also a step towards better checks for things like
	__attribute__ or std::tr1.

	* m4/ax_prefix_config_h.m4: New file.
	* configure.ac: Call AC_CONFIG_HEADERS and AX_PREFIX_CONFIG_H.
	* src/misc/Makefile.am: Install misc/_config.h.
	* src/misc/random.cc, src/misc/version.cc: Include misc/_config.h.

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2011-06-03  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Document the protocol used between ltl2tgba.html and spot.py.

	* wrap/python/ajax/protocol.txt: New file.
	* wrap/python/ajax/Makefile.am (EXTRA_DIST): Add it.

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2011-06-02  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	* iface/dve2/README: Document state compression.

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2011-06-02  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Update jQuery and jQuery-UI.

	* wrap/python/ajax/ltl2tgba.html: Adjust to use
	jQuery 1.6.1 and jQuery-UI 1.8.13.  Remove a useless check
	of $("#autoupdate").attr("checked") since this checkbox no longer
	exists.
	* wrap/python/ajax/css/ui-lightness/jquery-ui-1.8.8.custom.css:
	Replace by ...
	* wrap/python/ajax/css/ui-lightness/jquery-ui-1.8.13.custom.css: This.
	* wrap/python/ajax/Makefile.am (EXTRA_DIST): Adjust.

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2011-05-30  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	* iface/dve2/dve2.cc: Kill a spurious warning.

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2011-05-30  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	* bench/wdba/README: Typos.

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2011-05-18  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Some intvcomp2 speedups.

	* src/misc/intvcmp2.cc (stream_compression_base::run):
	Implement a shift-less encoding for the 1-bit and 3-bit cases.
	Also declare offsets as size_t, to help 64-bit compilers.

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2011-05-16  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	* src/misc/intvcomp.hh, src/misc/intvcmp2.hh: Include stddef.h for
	size_t.

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2011-05-05  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	* src/misc/intvcmp2.cc: Cosmetics to please sanity checks.

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2011-05-05  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Fix compilation error with g++ <= 4.3.

	* src/misc/intvcmp2.cc (int_array_array_compression): Specify full
	type of stream_compression_base<int_array_array_compression> in
	constructor to please g++ versions <= 4.3.

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2011-05-02  Alexandre Duret-Lutz  <adl@va-et-vient.net>

	DVE2: Minor memory compaction.

	* iface/dve2/dve2.cc (dve2_state, dve2_compressed_state): Store
	size and count on 16 bits, and hash on 32 bits, to limit memory
	wasted.

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2011-05-01  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	DVE2: Optionally use the new compression.

	* iface/dve2/dve2.cc, iface/dve2/dve2.hh, iface/dve2/dve2check.cc:
	Add a -Z option and pass it through.

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2011-05-01  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Implement a new compression inspired from simple-9.

	* src/misc/intvcmp2.cc, src/misc/intvcmp2.hh: New files.
	* src/misc/Makefile.am: Add them.
	* src/tgbatest/intvcmp2.cc: New test.
	* src/tgbatest/Makefile.am: Add it.
	* src/tgbatest/intvcomp.test: Call it.

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2011-04-15  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	* src/misc/intvcomp.cc: Low-level fine-tuning.

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2011-04-13  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Fix compression of large repetitions

	* src/misc/intvcomp.cc (stream_compression_base::run): Limit
	repeatitions to 40, not 42.
	(stream_decompression_base::refill): Refill the end of the stream
	with 0.
	(stream_decompression_base::look_n_bits): Add assertion.
	* src/tgbatest/intvcomp.cc: Add a new test case.

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2011-04-12  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	More interfaces to the int array compression routines.

	* src/misc/intvcomp.cc, src/misc/intvcomp.cc: Add interfaces to
	compress vector<int> to vector<unsigned>.
	* src/tgbatest/intvcomp.cc: Test them.
	* src/sanity/style.test: Refine check to avoid a spurious report.

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2011-04-11  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	* iface/dve2/dve2.cc: Typo when handling dead==true.

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2011-04-10  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Always pass --enable-devel or --disable-devel to BuDDy.

	* configure.ac: Do not add CXXFLAGS and CFLAGS in ac_configure_args,
	it causes problem when using config.cache.  Instead ...
	* m4/devel.m4: Add --enable-devel or --disable-devel on
	ac_configure_args, now that BuDDy understands that.

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2011-04-10  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	* src/misc/escape.hh: Fix Doxygen documentation.
	* src/misc/intvcomp.hh: Likewise.

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2011-04-09  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Move the compression routines into their own *.cc file.

	* src/misc/intvcomp.hh: Move all code...
	* src/misc/intvcomp.cc: ... in this new file.
	* src/misc/Makefile.am: Add invcomp.cc

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2011-04-09  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	DVE2: Use mspool for compressed states.

	* iface/dve2/dve2.cc: Adjust to use the new mspool allocator,
	and get rid of the std::vector used to store compressed states.
	* src/misc/intvcomp.hh: Add an "int* -> int*" interface
	in addition to the "int* -> vector<unsigned>*" interface.
	* src/tgbatest/intvcomp.cc: Test the two interfaces.

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2011-04-09  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Add a multiple-size memory pool implementation.

	* src/misc/mspool.hh: New file.
	* src/misc/Makefile.am: Add it.

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2011-04-08  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	* src/misc/fixpool.hh: Typo in comment.

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2011-04-08  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	DVE2: preliminary implementation of compressed states.

	* iface/dve2/dve2.cc (dve2_compressed_state): New class.
	(callback_context): Deal with general state*s, not dve2_state*s.
	(transition_callback_compress): New function.
	(dve2_kripke): Take a compress option.
	(get_init_state, compute_state_condition, succ_iter,
	format_state, state_condition): Handle compressed states.
	(get_vars, compute_state_condition_aux): New helper methods.
	* iface/dve2/dve2.hh (load_dve2): Add a compress option.
	* iface/dve2/dve2check.cc: Add a -z option.
	* iface/dve2/finite.test, iface/dve2/dve2check.test: Add more
	tests.

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2011-04-08  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Preliminary implementation of an int array compressor.

	* src/misc/intvcomp.hh: New file.
	* src/misc/Makefile.am: Add it.
	* src/tgbatest/intvcomp.cc, src/tgbatest/intvcomp.test: New files.
	* src/tgbatest/Makefile.am: Add them.

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2011-04-09  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Fix two spurious segfaults in test cases for the Python interface.

	* wrap/python/tests/setxor.py, wrap/python/tests/bddnqueen.py:
	Clean all used bdd variables before calling bdd_done(), so that
	bdd_delref() is never called after bdd_done().  In NDEBUG builds,
	bdd_delref() does not check whether the BuDDy is running or not,
	and calling it after bdd_done() will crash.

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2011-04-09  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	* HACKING: Add an example for using callgrind.

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2011-04-06  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	* iface/dve2/dve2check.cc (main): Catch out-of-memory errors
	during emptiness check or counterexample generation.

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2011-04-03  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	* src/tgba/tgbaproduct.hh, src/tgba/tgbaproduct.cc: Use
	a fixed-size memory pool for product_state instances.

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	* iface/dve2/dve2.cc: Use a fixed-size memory pool for dve2_state
	instances and their variables.

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2011-04-03  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Add a fixed-size memory pool implementation.

	* src/misc/fixpool.hh: New file.
	* src/misc/Makefile.am (misc_HEADERS): Add fixpool.hh.

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2011-04-03  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	* HACKING (command): Some notes about link-time optimizations.

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2011-04-03  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	* configure.ac: Pass CXXFLAGS/CFLAGS/CPPFLAGS debug/optimization
	settings to sub configure.

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2011-03-31  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Introduct a down_cast macro.

	* src/misc/casts.hh: New file.
	* src/misc/Makefile.am: Add it.
	* iface/dve2/dve2.cc, iface/gspn/gspn.cc, iface/gspn/ssp.cc,
	src/evtgba/explicit.cc, src/evtgba/product.cc, src/misc/casts.hh,
	src/tgba/state.hh, src/tgba/statebdd.cc, src/tgba/taatgba.cc,
	src/tgba/taatgba.hh, src/tgba/tgbabddconcrete.cc,
	src/tgba/tgbaexplicit.cc, src/tgba/tgbaexplicit.hh,
	src/tgba/tgbakvcomplement.cc, src/tgba/tgbaproduct.cc,
	src/tgba/tgbasafracomplement.cc, src/tgba/tgbasgba.cc,
	src/tgba/tgbatba.cc, src/tgba/tgbaunion.cc, src/tgba/wdbacomp.cc,
	src/tgbaalgos/ndfs_result.hxx, src/tgbaalgos/reductgba_sim.cc,
	src/tgbaalgos/reductgba_sim_del.cc: Use down_cast when
	appropriate.

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2011-03-31  Alexandre Duret-Lutz  <adl@va-et-vient.net>

	Cosmetics.

	* src/sanity/style.test: Catch some binary operators not
	delimited with spaces.
	* src/tgbaalgos/bfssteps.cc, src/tgbaalgos/magic.cc,
	src/tgbaalgos/reducerun.cc, src/tgbaalgos/se05.cc,
	src/tgbaalgos/tau03.cc, src/tgbaalgos/tau03opt.cc: Fix these.

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2011-03-31  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Make state_explicit instances persistent objects.

	* src/tgba/tgbaexplicit.cc, src/tgba/tgbaexplicit.hh: Merge
	state_explicit and tgba_explicit::state.  In the past,
	state_explicit was a small object encapsulating a pointer to the
	persistent tgba_explicit::state; and we used to clone() and
	destroy() a lot of state_explicit instance.  Now state_explicit is
	persistent, and clone() and destroy() have no effects.
	* src/tgba/tgbareduce.cc: Adjust, since this inherits from
	tgbaexplicit and uses the internals of state_explicit.
	* src/tgbatest/reductgba.cc: Fix deletion order for automata.
	* src/tgba/tgba.hh (last_support_conditions_input_,
	last_support_variables_input_): Make these protected, so
	they can be zeroed by tgba_explicit.

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2011-03-30  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Remove tgba_reduc::format_state().

	* src/tgba/tgbareduc.cc, src/tgba/tgbareduc.hh (format_state):
	Remove this useless copy of the tgba_explicit_string::format_state
	method.

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2011-03-30  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Protect the state destructor.

	Client code should always call the destroy() method instead.  (It
	was introduced in Spot 0.7.)

	* src/tgba/state.hh (state::~state): Make it protected.

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2011-03-30  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Speedup tgba_product when one of the argument is a Kripke structure.

	The gain is not very impressive.  The runtime of the first example
	in iface/dve2/README (also in dve2check.test) is 15% faster.

	* src/tgba/tgbaproduct.hh (tgba_succ_iterator_product): Move ...
	* src/tgba/tgbaproduct.cc (tgba_succ_iterator_product,
	tgba_succ_iterator_product_common): ... in these two classes.
	(tgba_succ_iterator_product_kripke): New class to speedup
	successor computation on Kripke structures.  We can assume that
	all the transitions leaving the same state have the same label.
	(tgba_product::tgba_product, tgba_product::succ_iter): Use
	tgba_succ_iterator_product_kripke when appropriate.
	(tgba_product_init::tgba_product_init): Adjust for the case
	where tgba_product did reverse its operands.

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2011-03-30  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	* iface/dve2/dve2check.cc: Remove stray debug output.

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2011-03-30  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	* src/tgba/tgbaproduct.hh: Do not include statebdd.hh.

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2011-03-29  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Include <cstddef> in python modules to workaround Swig bug.

	* wrap/python/spot.i, wrap/python/buddy.i: Include <cstddef>
	because Swig 2.0.2 uses ptrdiff_t and does not do the include
	itself.  In g++ most libstdc++ standard headers have been changed
	to no longer include <cstddef> as an implementation detail, so
	the difference shows.

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2011-03-20  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	* THANKS: Add Michael Weber for his help on the DiVinE interface.

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2011-03-18  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	* src/ltltest/genltl.cc (syntax): Typos in the help text.

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2011-03-17  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Improve a reduction rule for "a M b".

	* src/ltlvisit/reduce.cc (reduce_visitor): Always reduce "a M b"
	to "a & b" if "a" is a pure eventual formula, remove the
	constraint on "b".
	* src/ltltest/reduccmp.test: Add two tests.

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2011-03-11  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	* NEWS: Mention recent changes to dotty_reachable.

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2011-03-10  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Add support for finite behaviors in the DVE interface.

	* iface/dve2/dve2.hh (load_dve2): Take a "dead" argument.
	* iface/dve2/dve2.cc (callback_context): Add a destructor
	to simplify...
	(dve2_succ_iterator::~dve2_succ_iterator) ... this one.
	(convert_aps): Skip the dead proposition.
	(dve2_kripke::dve2_kripke): Take a dead argument, and
	setup alive_prop and dead_prop.
	(compute_state_condition, get_succ): Use a cache for the
	conditions and successor of the last state, to share
	some work between these two function.  Add loops on dead
	states.
	(load_dve2): Pass dead to dve2_kripke and convert_aps.
	* iface/dve2/dve2check.cc: Add a -dDEAD option.
	* iface/dve2/finite.test, iface/dve2/finite.dve: New file.
	* iface/dve2/Makefile.am: Declare them.

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2011-03-10  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	* iface/dve2/dve2.cc (convert_aps): Fix two typos while
	parsing >= and >, mistakenly registered as <= and <.

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2011-03-07  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Remove the Nips interface.

	* NEWS: Mention it.
	* configure.ac, README: Remove it.
	* iface/Makefile.am (SUBDIRS): Remove nips.
	* iface/nips/: Delete this directory.

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2011-03-07  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Accept "P_0 == CS" as synonym for "P_0.CS" in the dve2 interface.
	Suggested by Yann Thierry-Mieg.

	* iface/dve2/dve2.cc (convert_aps): Allow string on the right
	of operators, and look them up.
	* iface/dve2/dve2check.test: Test this syntax.

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2011-03-07  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Add some tests for the DVE2 interface.

	* iface/dve2/defs.in, iface/dve2/dve2check.test,
	iface/dve2/beem-peterson.4.dve: New files.
	* iface/dve2/Makefile.am: Add them.
	* configure.ac: Generate iface/dve2/defs.

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2011-03-07  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Clear the timer map to help valgrind.

	* src/misc/timer.hh (reset_all): New method.
	* iface/dve2/dve2check.cc: Use it to help valgrind.

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2011-03-07  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Some documentation of about the dve2 interface.

	* iface/dve2/README: New file.
	* NEWS: Mention it.

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2011-03-06  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	* iface/dve2/dve2.cc, iface/dve2/dve2check.cc: Cosmetic changes
	to please sanity checks.

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2011-03-06  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Call divine to compile dve models.

	* iface/dve2/dve2.cc (compile_dve2): New function.  Compile
	the *.dve source if there is no newer *.dve2C already.
	(load_dve2): Call compile_dve2 when given a *.dve file.
	* iface/dve2/dve2.hh (load_dve2): Document it.

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2011-03-06  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Allow atomic propositions and identifiers like `X.Y'.

	* src/ltlparse/ltlscan.ll: Do not recognize `.' as an AND.  Allow
	it in atomic propositions.
	* src/evtgbaparse/evtgbascan.ll, src/tgbaparse/tgbascan.ll: Accept
	`.' in identifiers.
	* src/misc/bareword.cc (is_bareword): Accept `.' inside
	barewords, so that there is no need to quote `X.Y'.
	* src/ltltest/parse.test: Do not use `.' as and operator..

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2011-03-06  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Augment dve2check to perform LTL model checking.

	* iface/dve2/dve2check.cc: Add many option to perform
	emptiness check and other debugging tasks.

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2011-03-05  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Teach the DVE2 interface about enumerated types.

	* iface/dve2/dve2.cc (convert_aps): Add support for
	enumerated types.  E.g. an atomic proposition such
	as "P_0.CS" really means "P_0 == CS".

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	Teach the DVE2 interface about atomic propositions such as "a <=
	10" or "b != 3".  This only work for integer variables presently.

	* iface/dve2/dve2.hh (load_dve2): Take an atomic_prop_set
	argument to indicate the AP to observe.
	* iface/dve2/dve2.cc (convert_aps): New function.  Parse the
	atomic propositions in format them in a prop_set structure that
	will allow fast generation of the state condition.
	(load_dve2): Call convert_aps, and pass the resulting prop_set
	structure to the kripke object.
	(dve2_kripke::dve2_kripke): Store the prop_set structure.
	(dve2_kripke::~dve2_kripke): Release the prop_set, and unregister
	the bdd_variable associated to it.
	(compute_state_condition): New method that uses the prop_set.
	(succ_iter, state_condition): Call compute_state_condition().
	* iface/dve2/dve2check.cc: Adjust the call to load_dve2 to
	pass it atomic propositions read from the command line.

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2011-03-05  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Display states variables in the state label.

	* iface/dve2/dve2.cc (dve2_kripke::dve2_kripke): Retrieve
	the name of all the state variables.
	(dve2_kripke::format_state): Use them to format the name
	of the state.

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2011-03-05  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	We can now explore a divine2 compiled model, but the atomic
	properties are still missing.

	* iface/dve2/dve2.cc, iface/dve2/dve2.hh: Add
	classes for presenting the DiVinE2 model as a kripke object.
	(load_dve2): Load the *.dve2C file using libltdl.
	* iface/dve2/Makefile.am: Add a dve2check program.
	* iface/dve2/dve2check.cc: New file.  Currently it just
	outputs the reachability graph using dotty.

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2011-03-05  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Setup libltdl in ltdl/, so we can use it in the dve2 interface.

	Don't keep it under version control since it is installed by
	autoreconf.

	* configure.ac: Call LT_CONFIG_LTDL_DIR and LTDL_INIT.
	* README: Mention ltdl/.
	* Makefile.am: Recurse into ldtl.
	* iface/dve2/Makefile.am: Link with it.

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2011-03-05  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Setup build system for a new dve2 interface.

	* iface/dve2/dve2.cc, iface/dve2/dve2.hh: New dummy files.
	* iface/dve2/Makefile.am: New file.
	* iface/Makefile.am (SUBDIRS): Add dve2.
	* configure.ac: Build iface/dve2/Makefile.
	* README: Mention the new directory.

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2011-03-05  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Using double borders for acceptance states in SBAs.

	* src/tgbaalgos/dotty.hh (dotty_reachable): Take a new
	assume_sba argument.
	* src/tgbaalgos/dotty.cc (dotty_bfs): Take a new
	mark_accepting_states arguments.
	(dotty_bfs::process_state): Check if a state is accepting using
	the state_is_accepting() method for tgba_sba_proxies, or by
	looking at the first outgoing transition of the state.  Pass
	the result to the dectorator.
	(dotty_reachable): Adjust function.
	* src/tgbaalgos/dottydec.hh, src/tgbaalgos/dottydec.cc,
	src/tgbaalgos/rundotdec.hh, src/tgbaalgos/rundotdec.cc
	(state_decl): Add an "accepting" argument, and use it to
	decorate accepting states with a double border.
	* src/tgbatest/ltl2tgba.cc: Keep track of whether the output
	is an SBA or not, so that we can tell it to dotty().
	* wrap/python/ajax/spot.in: Likewise.
	* wrap/python/cgi-bin/ltl2tgba.in: Likewise.

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2011-03-05  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	* src/ltltest/genltl.cc (GF_n): Really use "op".

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2011-03-04  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	* wrap/python/ajax/spot.in: Use the degeneralized automaton if
	available while computing the emptiness check.

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2011-03-04  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Speedup build_result() called by minimize_dfa().

	* src/tgbaalgos/minimize.cc (build_result): Speed it up by
	removing one useless loop, creating many duplicate transitions
	that had to be merged.

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2011-03-01  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	* src/ltltest/genltl.cc: Add 10 more LTL formula classes.

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2011-02-21  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	* src/tgba/bdddict.hh: Add more documentation.

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2011-02-21  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	* src/misc/escape.hh: Correct documentation.

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2011-02-14  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Correct tgba_explicit::compute_support_conditions.

	* src/tgba/tgbaexplicit.cc (tgba_explicit::compute_support_conditions):
	Fix logic.  This function has always been returning bddtrue instead
	of the actual computed value...

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2011-02-10  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Enable VERBOSE logs for nips, greatspn, and python tests.

	* wrap/python/tests/run.in, iface/nips/nipstest/defs.in,
	iface/gspn/defs.in: Do not disable VERBOSE when running from "make
	check".  Since we have started using parallel-check on 2009-08-31,
	we should always send verbose output to the log.

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2011-02-10  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	This should finally fix kv.test and dotty.test on the LIP6 buildfarm.

	* src/tgbatest/kv.test, iface/nips/nipstest/dotty.test: Don't rely
	on the ${DOT-...} syntax, because DOT is always set and might be
	set to the empty value.

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2011-02-10  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	* HACKING (Running coverage tests): New section.

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2011-02-09  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Previous patch did not work on MacOS X, and I don't have shell
	access to that host.

	* src/tgbatest/kv.test: Use ${DOT-true} instead of ${DOT-:}.  I
	don't know, the MacOS shell must be mixing the syntaxes for
	${DOT:-} and ${DOT-:}.
	* iface/nips/nipstest/dotty.test: Likewise

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2011-02-09  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Avoid running "dot" when it is not installed...

	* src/tgbatest/kv.test: Do not run dot if it is not installed.
	* iface/nips/nipstest/dotty.test: Likewise

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2011-02-08  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Add some tricks into HACKING.

	* README: Typo.
	* HACKING: s/CVS/GIT/ and add some tricks about libtool and doxygen.

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2011-02-08  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Adjust the WDBA test to count for sub-transitions.

	* bench/wdba/run: Use -kt to count sub-transitions.
	* bench/wdba/README: Adjust comments.

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2011-02-08  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Fix a spurious g++ warning observed on Darwin builds.

	* src/tgba/taatgba.cc (taa_succ_iterator::taa_succ_iterator):
	Initialize iterator i to silence a spurious g++ warning on Darwin.

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2011-02-07  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	* configure.ac: s/gnit/gnu so that we can use 0.7.1a as a version.

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2011-02-07  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	* NEWS: Typos.

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2011-02-07  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	* NEWS, configure.ac: Bump version to 0.7.1a

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2011-02-07  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Release Spot 0.7.1.

	* NEWS: Update for 0.7.1.
	* configure.ac: Bump version to 0.7.1.

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2011-02-07  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Generalize patch from 2011-02-03 by allowing guards like "! (...)".

	* src/neverparse/neverclaimscan.ll: Allow space between ! and (.
	* src/tgbatest/neverclaimread.test: Add space for testing.

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2011-02-06  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Speedup scc_filter on tgba_explicit_number automata.

	* src/tgbaalgos/sccfilter.cc (scc_filter): If the input automaton
	is an instance of tgba_explicit_number, create a similar automaton
	for output, instead of a tgba_explicit_string.

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2011-02-06  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Document the new operators in the on-line tools.

	* wrap/python/ajax/ltl2tgba.html: Mention Goal's ~, -->, and <-->
	operators.
	* wrap/python/cgi-bin/ltl2tgba.in: Likewise.

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2011-02-06  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Fix a segfault in WDBA minimization.

	* src/tgbaalgos/minimize.cc (build_result, minimize_dfa,
	minimize_wdba): Correctly handle (i.e. ignore) useless states.
	* src/tgbatest/ltl2tgba.test: Add two more tests.

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2011-02-05  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Fix call to scc_filter in the CGI script.

	* wrap/python/ajax/spot.in: Do full scc_filter for TGBA (-R3f),
	and keep some extra acceptance conditions (-R3) when
	degeneralizing.  The converse was done.

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2011-02-04  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	* wrap/python/cgi-bin/ltl2tgba.in: Fix python error occurring
	only when the user did not make any error...

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2011-02-04  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Prevent Spot from using an installed BuDDy version that does not
	have the latest function we added.  Reported by Kristin Rozier.

	* m4/buddy.m4 (AX_CHECK_BUDDY): Check for bdd_setxor.

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2011-02-04  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Add a way to count the number of sub-transitions.

	* src/tgbaalgos/stats.hh (tgba_sub_statistics): New class.
	(sub_stats_reachable): New function.
	* src/tgbaalgos/stats.cc (sub_stats_bfs): New class.
	(tgba_sub_statistics::dump, sub_stats_reachable): New function.
	* src/tgbatest/ltl2tgba.cc (-kt): New option.
	* src/tgbatest/ltl2tgba.test: Use -kt.

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2011-02-03  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Read guard of the form !(x) in neverclaims.

	So far all neverclaims encountered would use (!(x)), but the
	files from the Büchi store do not.

	* src/neverparse/neverclaimscan.ll: Accept ! in front of guard,
	so that we can read Promela files from Goal's Büchi store.
	* src/tgbatest/neverclaimread.test: Test it.

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2011-02-03  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Recognize Goal's syntax for Boolean operators.

	* src/ltlparse/ltlscan.ll: Recognize ~, -->, and <--> operators
	from Goal, to ease the use of formulas provided by the Goal team.
	* src/ltltest/equals.test: Use these once, just to be on the
	safe side.

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2011-02-03  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Minor fixes to ltl2tgba.html.

	* wrap/python/ajax/css/ltl2tgba.css,
	wrap/python/ajax/ltl2tgba.html: Tweak a few things for Firefox
	3.0, and fix a </li> tag.

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2011-02-01  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	* NEWS, configure.ac: Bump version to 0.7a.

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2011-02-01  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Release Spot 0.7.

	* NEWS, configure.ac: Bump version to 0.7.

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2011-02-01  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	* src/tgbatest/ltl2tgba.test: Fix previous test case.

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2011-01-28  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Fixup minimize_monitor().

	* src/tgbaalgos/minimize.cc (minimize_monitor): Fix typo yielding
	incorrect monitor if the input tgba is not deterministic.
	* src/tgbatest/ltl2tgba.test: Add test case.

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2011-01-27  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Report formulas that are both safety and guarantee.

	* src/tgbatest/ltl2tgba.cc (-O): Report formulas that are both
	safety and guarantee.
	* src/tgbatest/obligation.test: Add cases.

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2011-01-27  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Rename is_safety_automaton() as is_guarantee_automaton() and
	implement is_safety_mwdba().

	Note: I swapped the name of safety and guarantee when I
	implemented is_safety_automaton() on 2010-03-20.  Fortunately,
	is_safety_automaton() was only used where is_guarantee_automaton()
	would have been correct.

	* src/tgbaalgos/safety.cc (is_guarantee_automaton): Rename as ...
	(is_guarantee_automaton): ... this.
	(is_safety_mwdba): New function.
	* src/tgbaalgos/safety.hh: Adjust and add documentation.
	* src/tgbaalgos/minimize.cc: Use is_guarantee_automaton() instead
	of is_safety_automaton().
	* src/tgbatests/safety.test: Rename as ...
	* src/tgbatests/obligation.test: ... this, and augment the
	test.
	* src/tgbatest/Makefile.am: Adjust.
	* src/tgbatest/ltl2tgba.cc (-O): Display whether a formula
	represent a safety, guarantee, or obligation property.
	* NEWS: Adjust.

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	* NEWS: Minor rewritings.

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2011-01-27  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Replace delete by destroy in comments dealing with states.

	* src/tgba/succiter.hh, src/tgba/tgba.hh,
	src/tgba/tgbabddconcrete.hh, src/tgba/tgbaproduct.hh,
	src/tgba/tgbaunion.hh, src/tgbaalgos/bfssteps.hh,
	src/tgbaalgos/gtec/ce.cc, src/tgbaalgos/gtec/explscc.hh,
	src/tgbaalgos/gtec/gtec.cc, src/tgbaalgos/replayrun.cc,
	src/tgbaalgos/scc.cc, src/tgbaalgos/scc.hh: Update comments
	to say that we "destroy" a state instead of "deleting" it.

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2011-01-26  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Update gspn interface for recent tools.

	* iface/gspn/ssp.cc: Use the new destroy() interface, and
	fix a couple of recent g++ reports.
	* iface/gspn/gspn.cc: Adjust to newer g++.

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2011-01-25  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Introduce a destroy() method on states, and use it instead of delete.

	Right now, destroy() just executes "delete this".  But in a later
	version, we will rewrite tgba_explicit so that it does not
	allocate new states (and the destroy() method for explicit state
	will do nothing).

	* src/tgba/state.hh (state::destroy): New method, to replace
	state::~state() in the future.
	(shared_state_deleter): New function.
	* src/evtgba/product.cc, src/evtgbaalgos/reachiter.cc,
	src/evtgbaalgos/save.cc, src/evtgbaalgos/tgba2evtgba.cc,
	src/tgba/tgba.cc, src/tgba/tgbaproduct.cc, src/tgba/tgbareduc.cc,
	src/tgba/tgbasafracomplement.cc, src/tgba/tgbasgba.cc,
	src/tgba/tgbatba.cc, src/tgba/tgbaunion.cc, src/tgba/wdbacomp.cc,
	src/tgbaalgos/cutscc.cc, src/tgbaalgos/emptiness.cc,
	src/tgbaalgos/gtec/ce.cc, src/tgbaalgos/gtec/explscc.cc,
	src/tgbaalgos/gtec/gtec.cc, src/tgbaalgos/gtec/nsheap.cc,
	src/tgbaalgos/gv04.cc, src/tgbaalgos/magic.cc,
	src/tgbaalgos/minimize.cc, src/tgbaalgos/ndfs_result.hxx,
	src/tgbaalgos/neverclaim.cc, src/tgbaalgos/powerset.hh,
	src/tgbaalgos/reachiter.cc, src/tgbaalgos/reducerun.cc,
	src/tgbaalgos/reductgba_sim.cc,
	src/tgbaalgos/reductgba_sim_del.cc, src/tgbaalgos/replayrun.cc,
	src/tgbaalgos/safety.cc, src/tgbaalgos/save.cc,
	src/tgbaalgos/scc.cc, src/tgbaalgos/se05.cc,
	src/tgbaalgos/tau03.cc, src/tgbaalgos/tau03opt.cc: Adjust to call
	"s->destroy()" instead of "delete s".
	* src/saba/sabacomplementtgba.cc, src/tgba/tgbakvcomplement.cc:
	Pass shared_state_deleter to the shared_ptr constructor, so that
	it calls destroy() instead of delete.

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	* wrap/python/ajax/ltl2tgba.html: Display the Spot version in
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	the tooltip over the Spot logo.

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	* wrap/python/ajax/Makefile.am (EXTRA_DIST): Add icons/mail.png.

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2011-01-26  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	* NEWS: Mention the new on-line ltl2tgba version.

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2011-01-26  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Updates to the ltl2tgba ajax version.

	* wrap/python/ajax/ltl2tgba.html: Remove the auto-update button, and
	enable auto-update automatically after the first submission.  Add
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	tools tips for the "Desired Output" tabs, and the Spot logo.
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	Add a email icon to encourage feedback.
	* wrap/python/ajax/ltl2tgba.css: fix sizes of formula field and
	send button.  Set position of mail icon.
	* wrap/python/ajax/logos/mail.png: New logo, based on a public
	domain SVG icon retrieved today from
	http://commons.wikimedia.org/wiki/File:Internet-mail.svg

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	* wrap/python/ajax/ltl2tgba.html: Disable the browser spellcheck
	on the input box.

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	Preliminary implementation of an ajax-based ltl2tgba translator.

	* configure.ac: Output wrap/python/ajax/Makefile.
	* wrap/python/Makefile.am (SUBDIRS): Add ajax.
	* wrap/python/ajax/Makefile.am, wrap/python/ajax/README,
	wrap/python/ajax/ltl2tgba.html, wrap/python/ajax/spot.in: New files.
	* wrap/python/ajax/css/, wrap/python/ajax/js,
	wrap/python/ajax/logos: New directories.
	* README: Document wrap/python/ajax/.

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2011-01-17  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Do not output empty parse error blocks in the CGI script.

	* wrap/python/spot.i: Provide a __nonzero__() method for
	parse_error_list.
	* wrap/python/cgi-bin/ltl2tgba.in: Do not call format_parse_errors()
	unconditionally.

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	Fix "unused function" warnings reported by clang++.

	* src/evtgbaparse/Makefile.am, src/ltlparse/Makefile.am,
	src/neverparse/Makefile.am, src/tgbaparse/Makefile.am
	(AM_CPPFLAGS): Define -DYY_NO_INPUT so that the unused yyinput()
	function does not get compiled.
	* src/eltlparse/Makefile.am (AM_CPPFLAGS): Likewise.
	(AM_CXXFLAGS): Also enable warnings.
	* src/eltlparse/eltlparse.yy: Move helper functions from
	the "%code requires" block to the "%code" block, so that they
	do not appear in the eltlparse.hh file (which is included in
	two places...).
	* iface/nips/nips.cc (search_error_callback_assert): Comment
	this unused function.

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	Fix segfault with g++-3.3.

	* src/tgbaalgos/minimize.cc (minimize_dfa): Fix deletion of the
	state_set_map.  It led to a crash when compiled with g++-3.3.

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2011-01-12  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Fix a compilation failure with g++-3.3.

	* src/misc/hash.hh (identity_hash): New function.
	* src/tgba/tgbaexplicit.hh (tgba_explicit_number): Use
	identity_hash<int> instead of std::tr1::hash<int> that does not
	exist with g++-3.3.

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	Fix usage of minimize_obligation in the CGI script.

	* wrap/python/cgi-bin/ltl2tgba.py (reduce_wdba): Use
	minimize_obligation_new a pass the formula.
	* wrap/python/spot.i (minimize_obligation_new): New function, to
	cope with the strange specification of spot::minimize_obligation()
	not always creating a new automaton.

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	* NEWS: Convert to utf-8 and fix a few typos.

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	'([]a && XXXX!a)' was not properly minimized because its
	translation contain useless SCCs that where not ignored for
	minimization.

	* src/tgbaalgos/minimize.cc (minimize_wdba): Strip useless
	SCCs before minimization.
	* src/tgbatest/ltl2tgba.test: Add a check.

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	The neverclaim output by spin -f '([]a && XXXX!a)' was not
	understood by Spot.

	* src/neverparse/neverclaimparse.yy: Support "if :: false fi;"
	instructions.  Spin sometimes output these on dead states.
	Also rewrite the "transitions" rule as a left recursion.
	* src/tgbatest/neverclaimread.test: Adjust output because
	of the right->left recursion change, and add two more formula
	to submit to Spin to test its output.

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	Speed up computation of non_final states for minimize_wdba.

	* src/tgbaalgos/minimize.cc (minimize_dfa): Take final and
	non_final sets.
	(minimize_wdba): Fill in non_final at the same time as final.
	(minimize_monitor): Call state_set() to fill non_final.
	(init_sets): Simplify and rename as ...
	(state_set): ... this.

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2011-01-06  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Introduce a class to complement a WDBA on-the-fly.

	* src/tgba/wdbacomp.hh, src/tgba/wdbacomp.cc: New file.
	* src/tgba/Makefile.am: Add them.
	* src/tgbaalgos/minimize.cc (minimize_obligation): Use
	wdba_complement().

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	* src/tgbatest/Makefile.am: Remove the unused minimize program.
	* src/tgbatest/minimize.cc: Delete.

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	Cleanup the minimize.hh interface.

	* src/tgbaalgos/minimize.hh, src/tgbaalgos/minimize.cc
	(minimize): Split into ...
	(minimize_wdba, minimize_monitor): ... these two functions.
	* src/tgbatest/ltl2tgba.cc (main): Adjust the call to
	minimize_monitor.
	* wrap/python/cgi-bin/ltl2tgba.in: Adjust the calls to
	minimize_monitor and minimize_obligation.
	* wrap/python/spot.i: Declare minimize_monitor, minimize_wdba,
	minimize_obligations.
	* src/tgba/tgbaexplicit.hh (tgba_explicit_string)
	(tgba_explicit_formula, tgba_explicit_number): Add fake
	declarations so that SWIG can see they inherits from tgba.

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	Cleanup the DFA minimization algorithm.

	* src/tgbaalgos/minimize.cc (minimize):  Move the minimization
	code into...
	(minimize_dfa): ... this new function, and fix the condition
	under which a partition is considered to be minimal.  Also
	use a map instead of a list to lookup known formulae.

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	Speed up the obligation test.

	* src/tgbaalgos/minimize.cc (minimize_obligation): Do not
	minimize aut_neg_f, complement min_aut_f instead.
	* src/tgbaalgos/minimize.hh: Adjust description.

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	* src/tgbaalgos/minimize.cc (minimize): Use the Loeding algorithm
	to label transient states.

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	Rewrite the check of WDBA state acceptance in minimize().

	* src/tgbaalgos/powerset.hh (power_map): New structure, allowing
	the caller to retrieve the set of original states corresponding to
	the set in the deterministic automaton.
	(power_set): Adjust prototype to take a power_map instead of the
	acc_list.
	* src/tgbaalgos/powerset.cc (power_set): Strip all code using
	acc_list, and update power_set.
	* src/tgbaalgos/minimize.cc (minimize): Rewrite, using an
	algorithm similar to the one in the Dax paper to check whether
	state of the minimized automaton should be accepting.

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	* src/tgbaalgos/scc.hh, src/tgbaalgos/scc.cc (scc_map::trivial,
	scc_map::one_state_of): Two new helper functions.

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	* src/tgba/tgbaunion.hh: Remove one useless include.

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	* README: Mention bench/wdba/.

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	Define tgba_product_init, a new kind of product with different
	initial states.

	* src/tgba/tgbaproduct.hh, src/tgba/tgbaproduct.cc
	(tgba_product_init): New class.

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	* src/tgbatest/spotlbtt.test: Add test for -l -R3b, showing many
	failure because the minimization() algorithm is currently
	incorrect when applied to non-weak automata.

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	* src/tgbaalgos/scc.hh: Typo in documentation.

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	Move the logic for detecting when the minimize() algorithm is
	correct from ltl2tgba to the library.

	* src/tgbaalgos/minimize.hh,
	src/tgbaalgos/minimize.cc (minimize_obligation): New function.
	* src/tgbatests/ltl2tgba.cc (main): Fix constness of automata,
	and call minimize_obligation() for -R3b.

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2010-12-26  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Make minimization of obligation properties and deterministic
	monitor available in the CGI script.

	* wrap/python/spot.i: Declare the minimize() interface.
	* wrap/python/cgi-bin/ltl2tgba.in: Add reduce_dmonitor and
	reduce_wdba options.

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2010-12-14  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Add a WDBA benchmark.

	* bench/wdba/: New directory.
	* bench/Makefile.am (SUBDIRS): Add wdba.
	* NEWS: Mention it.
	* configure.ac: Output bench/wdba/defs and bench/wdba/Makefile.

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2010-12-13  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	* NEWS: Update the news about minimization.

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2010-11-26  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Speed up wdba.test, it was too slow for our buildfarm.

	* src/tgbatest/wdba.test: Speed up execution by running only a
	couple of formula with valgrind.  Half of those with`-l -R3b' and
	the other half with `-f -R3'.

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2010-11-26  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	* src/tgbatest/ltl2tgba.cc (syntax): Regroup -M, -s, and -S option
	under the same heading "automaton conversion".

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2010-11-25  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Preliminary support for monitors.

	* src/tgbatest/ltl2tgba.cc (-M): New option for building
	deterministic monitors.
	* src/tgbaalgos/minimize.cc (minimize): Take a monitor
	argument and adjust the code.
	* src/tgbaalgos/minimize.hh (minimize): Document it.

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2010-11-25  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	"ltl2tgba -Rm -X foo.tgba" would fail.

	* src/tgbatest/ltl2tgba.cc (main): Warn if -Rm is used without
	knowing the formula whose automaton is minimized.

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2010-11-25  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Fix bugs in minimize().

	* src/tgbaalgos/minimize.cc (init_sets, minimize): Fix memory
	leaks and a usage of the wrong automaton.
	* src/tgbatest/wdba.test: Try using -Rm with -R3 or -R3b, and with
	valgrind.  This caught all the bugs fixed above.

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2010-04-13  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Fix bugs in minimize(), caught by spotlbtt.test.

	* src/tgbaalgos/minimize.cc (minimize): Don't add acceptance
	conditions if the final set is empty.
	* src/tgbaalgos/powerset.cc (tgba_powerset): Add the initial state
	to acc_list if it is accepting.  Also do not compute an SCC build
	map if we don't have to build acc_list.

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2010-04-13  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	"ltl2tgba -Rm" will apply WDBA-minimization only if correct.

	* src/tgbatest/ltl2tgba.cc (main): Use WDBA-minimization only when
	it is correct. Either we can quickly determine that a formula or
	its negation is a safety formula, or we can slowly check the
	equivalence of the WDBA-minimized automaton and the original
	automaton.
	* src/tgbatest/wdba.test: New test.
	* src/tgbatest/safety.test: Adjust comment.
	* src/tgbatest/spotlbtt.test: Use -Rm.
	* src/tgbatest/Makefile.am (TESTS): Add wdba.test.

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2010-04-13  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Better resource handling in minimization.

	* src/tgbatest/ltl2tgba.cc (main): Delete the minimized automaton.
	* src/tgbaalgos/minimize.cc (minimize): Remove the call to
	unregister_variable() at the end.  It was both
	wrong (unregistering only the first variable) and useless ("delete
	del_a" will unregister all these variables).  Use a map and a set
	to keep track of free BDD variable and reuse them, otherwise the
	algorithm would sometimes use more variables than allocated.

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2010-03-20  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Implement is_safety_automaton().

	* src/tgbaalgos/safety.hh, src/tgbaalgos/safety.cc: New
	files.
	* src/tgbaalgos/Makefile.am: Add them.
	* src/tgbatests/ltl2tgba.cc: Add option "-O".
	* src/tgbaalgos/scc.hh: Update documentation.
	* src/tgbatest/Makefile.am (TESTS): Add safety.test.
	* src/tgbatest/safety.test: New file.

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2010-03-26  Felix Abecassis  <abecassis@lrde.epita.fr>

	* src/tgbaalgos/minimize.cc: Now use register_anonymous_variables.

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2010-03-20  Felix Abecassis  <abecassis@lrde.epita.fr>

	Small fixes.

	* src/tgbatest/minimize.cc: Delete useless includes.
	* src/tgbaalgos/minimize.cc: Delete useless includes,
	fixed acceptance conditions.
	* src/tgbatest/ltl2tgba.cc: Add -Rm option for minimization.
	* src/tgba/tgbaexplicit.cc: Fixed typo.

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2010-03-20  Felix Abecassis  <abecassis@lrde.epita.fr>

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	Test program for the minimization algorithm.

	* src/tgbatest/minimize.cc: New file.  Minimize an automaton
	from a LTL formula and compare the size of the initial automaton
	to the size of the minimized automaton.

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	* src/tgbaalgos/minimize.cc, src/tgbaalgos/minimize.hh:
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	New files.  Algorithm to minimize an automaton using first the powerset
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	construction to determinize the input automaton, the automaton is then
	minimized using the standard algorithm, using BDDs to check if states
	are equivalent.

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2010-03-20  Felix Abecassis  <abecassis@lrde.epita.fr>

	Modify the powerset algorithm to keep track of accepting states
	from the initial automaton.

	* src/tgba/tgbaexplicit.cc, src/tgba/tgbaexplicit.hh:
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	Added class tgba_explicit_number, a tgba_explicit where states are
	labelled by integers.
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	* src/tgbaalgos/powerset.hh, src/tgbaalgos/powerset.cc:
	When building the deterministic automaton, keep track of which states
	were created from an accepting state in the initial automaton.
	The states are added to the new optional parameter (if not 0),
	acc_list.
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	Use tgba_explicit_number instead of tgba_explicit_string to build
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	the result.
	* src/tgbaalgos/scc.cc (spot): Small fix.
	Print everything on std::cout.

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2011-01-05  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Fix computation of support_conditions for bdd-based TGBA.
	This fixes a bug in the powerset of such TGBA on the minimize branch.

	* src/tgba/tgbabddconcrete.cc (compute_support_conditions): Also
	account for the conditions from the acceptance relations.
	* rc/tgba/tgbabddconcretefactory.hh, rc/tgba/tgbabddconcretefactory.cc
	(acceptance_conditions_support): New variable to hold the value
	of bdd_support(acceptance_conditions_support).
	* src/tgba/tgbabddconcretefactory.cc (finish): Update
	data_.acceptance_conditions_support.

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2010-12-26  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	* wrap/python/cgi-bin/ltl2tgba.in: Remove all "new" markers.

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2010-12-23  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Define SWIG_TYPE_TABLE as suggested by the SWIG documentation.

	* wrap/python/Makefile.am: Add -DSWIG_TYPE_TABLE=spot.

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2010-12-23  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Use swig2.0 if available.

	* configure.ac: Search for swig2.0 and swig.
	* wrap/python/Makefile.am: Use $(SWIG).

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2010-12-23  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Get rid of ltihooks.py.

	ltihooks.py apparently breaks the import mechanisms of Python 2.6,
	causes SWIG's runtime to fail to share a global type table, and
	yields various failures in our tests.

	* wrap/python/ltihooks.py: Delete.
	* wrap/python/Makefile.am (EXTRA_DIST): remove ltihooks.py.
	* wrap/python/tests/bddnqueen.py, wrap/python/tests/interdep.py,
	wrap/python/tests/ltl2tgba.py, wrap/python/tests/ltlparse.py,
	wrap/python/tests/ltlsimple.py, wrap/python/tests/minato.py,
	wrap/python/tests/modgray.py, wrap/python/tests/optionmap.py,
	wrap/python/tests/setxor.py: Do not use ltihooks.
	* wrap/python/tests/run.in (pypath): Include the .libs/ directories
	in the search path so that Python can find the *.so libraries.
	* wrap/python/cgi-bin/ltl2tgba.in: Insert the .libs/ directories
	into sys.path instead of importing ltihooks.

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2010-12-12  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	* NEWS: Summarize recent changes.

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2010-12-11  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Merge transitions in tgba_tba_proxy.

	With this change the output of
	ltl2tgba -f -x -k -DS "GF(p_1) & ... & GF(p_n)
	uses less than (n+1)^2 transitions when it used
	exactly (n+1)*(2^n) transitions before.

	* src/tgba/tgbatba.cc (tgba_tba_proxy_succ_iterator): Merge
	transitions going to the same states if they are both accepting or
	if neither are.
	(state_ptr_bool_t, state_ptr_bool_less_than): Helper type to
	store a transition in tgba_tba_proxy_succ_iterator.
	* src/tgba/tgbatba.cc, src/tgba/tgbatba.hh
	(tgba_tba_proxy::transition_annotation): Remove.  We cannot
	implement this method if transitions are merged.
	* src/tgbatest/ltl2tgba.test: Add a test.

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2010-12-10  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Augment the size of the ltlclasses benchmark.

	* bench/ltlclasses/run: Augment the max size to 20.
	* bench/ltlcounter/run: Typo in comment.

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2010-12-10  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Introduce -ks to print only the size of the automaton (without
	SCC information).

	* src/tgbatest/ltl2tgba.cc (syntax, main): Add a -ks option.
	* src/tgbatest/ltl2tgba.test, bench/ltlclasses/run,
	bench/ltlcounter/run: Use -ks instead of -k to speed things up.

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2010-12-09  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Use a cache to speed up tgba_tba_proxy.

	tgba_tba_proxy used to spend a lot of time (re)computing the
	acceptance condition common to all outgoing transition of a state.

	* src/tgba/tgbatba.hh (accmap_): New cache.
	(common_acceptance_conditions_of_original_state): New method.
	* src/tgba/tgbatba.cc (tgba_tba_proxy_succ_iterator::~sync)
	Call common_acceptance_conditions_of_original_state() instead of
	computing the result.
	(~tgba_tba_proxy): Cleanup the cache.
	(common_acceptance_conditions_of_original_state): Implement it.

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2010-12-07  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	* src/ltltest/Makefile.am (genltl_SOURCES): Add missing variable.

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2010-12-07  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	* README: Mention bench/ltlclases/.

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2010-12-04  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Preliminary benchmark using genltl, introduced earlier.

	* bench/ltlclasses/: New benchmark.
	* bench/Makefile.am: Add it.
	* configure.ac: Adjust.

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2010-12-04  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	* src/ltlvisit/syntimpl.cc: Reduce the number of dynamic_cast<>s.

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2010-12-04  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Preliminary implementation of a tool to generate some interesting
	families of LTL formulae.

	* src/ltltest/genltl.cc: New file.  Based on five classes of
	formulae defined in a paper by Cichón, Czubak, and Jasiński.
	* src/ltltest/Makefile.am (noinst_PROGRAMS): Build genltl.

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2010-12-03  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Add full_parent support to to_spin_string().

	* src/ltlvisit/tostrinc.hh (to_spin_string): Add a full_parent
	optional parameter, like for the to_string() function.
	* src/ltlvisit/tostrinc.cc (to_string_visitor): Fix the
	handling of full_parent.
	(to_spin_string_visitor): Handle full_parent.

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	Halve the number of application of eventual_universal_visitor in
	reduce_visitor::visit(binop).

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	* src/ltlvisit/reduce.cc (eventual_universal_visitor::recurse_):
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	Move this method...
	(recurse_eu): ... outside as a separate function.  Likewise for
	the universal/eventual result struct.
	(reduce_visitor::visit(binop)): Call recurse_eu() once to replace
	two calls to is_eventual and is_universal, thus replacing two
	recursions by one.

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2010-12-01  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Move the eventual-universal functions where the belong.

	* src/ltlvisit/syntimpl.cc (eventual_universal_visitor,
	is_eventual, is_universal): Move ...
	* src/ltlvisit/reduce.cc (eventual_universal_visitor,
	is_eventual, is_universal): ... here.

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2010-11-30  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	* src/ltlvisit/randomltl.cc (random_ltl::update_sums): Typo in string.

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2010-11-30  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Remove a quadratic behavior in eventual_universal_visitor.

	* src/ltlvisit/syntimpl.cc (eventual_universal_visitor): Use
	a union to store the eventual and universal properties as two
	bit in a bit-field, and "AND" both of them at once.
	(eventual_universal_visitor::recurse_un,
	eventual_universal_visitor::recurse_ev): Replace these
	two functions by ...
	(eventual_universal_visitor::recurse_): ... this one, that
	returns both bits as an unsigned.

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2010-12-01  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	* src/tgbatest/ltl2tgba.cc (main): Delete the accepting run
	even if it hasn't been printed.

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2010-11-30  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Rationalize options for counter-example output.

	* src/tgbatest/ltl2tgba.cc (main): Either replay the accepting
	run or print it, but do not do both.
	* src/tgbatest/emptchk.test: Adjust. I.e. use -C instead of -CR
	when we expect the run to be displayed.

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2010-11-30  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Fix a GCC 4.6 warning.

	* src/tgbatest/randtgba.cc (main): Remove the set but unused opt_A
	variable (the upcoming GCC 4.6 would warn about it) and set opt_ec
	to 1 if -A is used without -e.

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2010-11-27  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	* src/tgbatest/ltl2tgba.cc (syntax): Typo.

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2010-11-27  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Another Clang report.

	* iface/nips/nips.cc (format_state): Do not use a variable-sized
	array, this is not allowed in C++.

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2010-11-27  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Fix more errors reported by Clang.

	* src/tgbaalgos/reducerun.hh (tgba_run): Predeclare as a struct
	since this is what it is.
	* src/tgbatest/randtgba.cc (main): Avoid using "i" with two
	different type in the same loop.

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2010-11-26  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Finalize Kripke interface.

	* src/kripke/fairkripke.hh, src/kripke/fairkripke.cc,
	* src/kripke/kripke.hh, src/kripke/kripke.cc: Finalize and
	document the Kripke interface.  I have tested it by updating
	checkpn to use it.

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2010-11-25  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Never claim output used to print the degeneralized automaton
	before some optional operations (like more optimizations, or a
	product).

	* src/tgbatest/ltl2tgba.cc (-N, -NN): Make sure we print the last
	automaton computed, not just the automaton when we degeneralized
	it.  We may have applied other algorithms since the original
	degeneralization.

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2010-11-25  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	* src/tgbatest/ltl2tgba.test: Test both -l and -f.  This should
	have been done on 2010-01-30 when the default translation was
	changed from -l to -f.

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2010-11-25  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	* src/tgbaalgos/scc.hh: Typos in the documentation.

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2010-11-24  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	* src/tgbaalgos/sccfilter.hh: Fix some typos in the documentation.

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2010-11-24  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Suggest using bddtrue and bddfalse instead of bdd_true() and
	bdd_false().

	* src/sanity/style.test: Catch uses of bdd_true() or bdd_false().

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2010-11-20  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Fix some struct/class missmatches reported by clang.

	* src/ltlast/predecl.hh: Predeclare the LTL AST nodes as class,
	not struct.
	* src/ltlast/nfa.hh (formula_tree::node): Predeclare as struct,
	not class.

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2010-11-07  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Add interface for and test the bdd_setxor() function added to Buddy.

	* wrap/python/buddy.i (bdd_setxor): New function.
	* wrap/python/tests/setxor.py: New file.
	* wrap/python/tests/Makefile.am (TESTS): Add setxor.py.

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2010-11-06  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	* src/Makefile.am (libspot_la_LIBADD): Rename libneverclaimparse.la
	as libneverparse.la.
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	* src/neverparse/Makefile.am: Install files in
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	$(pkgincludedir)/neverparse, not $(pkgincludedir)/neverclaimparse.

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2010-11-06  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Cosmetics to please sanity checks.

	* src/neverparse/public.hh, src/neverparse/parsedecl.hh: Fix
	inclusion guards.
	* src/tgba/tgbaexplicit.hh, src/tgbatest/emptchk.test,
	src/tgbatest/ltl2tgba.cc: Fix trailing whitespaces.

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2010-11-06  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	* src/tgbatest/ltl2tgba.cc: Clock the time spent reading -P file.

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	* src/tgbatest/neverclaimread.test: Check that Spot can read the
	neverclaims it outputs.

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2010-11-06  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Do not output a counterexample by default in ltl2tgba, introduce
	options -C and -CR for that.

	* src/tgbatest/ltl2tgba.cc: Add option -C and -CR to control
	whether we want the accepting run to be printed or replayed.
	* src/tgbatest/dfs.test, src/tgbatest/eltl2tgba.test,
	src/tgbatest/emptchk.test, src/tgbatest/emptchke.test,
	src/tgbatest/ltl2tgba.cc, src/tgbatest/ltlcounter.test: Use -CR.

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2010-11-06  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Make sure the neverclaim parser works on the output of spin and
	ltl2ba.

	* src/neverparse/neverclaimparse.yy: Accept multiple labels
	for the same state.  Honor accepting states.  Forward parse
	error from the parser used for guards.  Accept "false" as a
	single instruction for a state.
	* src/neverparse/neverclaimscan.ll: Recognize "false" specifically,
	and remove the ";" hack.
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	* src/tgba/tgbaexplicit.cc
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	(tgba_explicit_string::~tgba_explicit_string): Adjust not to
	destroy a state twice.
	* src/tgba/tgbaexplicit.hh
	(tgba_explicit_string::add_state_alias): New function.
	* src/tgbatest/defs.in (SPIN, LTL2BA): New variables.
	* src/tgbatest/neverclaimread.test: Check error messages for
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	syntax errors in guards.  Make sure we can read the output
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	of `spin -f' and `ltl2ba -f' on a few test formulae.

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2010-11-06  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Cleanup neverclaim support.

	* src/neverclaimparse/: Shorthen as ...
	* src/neverparse/:... this.
	* src/Makefile.am: Adjust, and add back the directories mistakenly
	removed by previous patch.
	* README: Adjust, and keep the file's width under 80 columns.
	* configure.ac: Adjust.
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	* src/neverparse/Makefile.am, src/neverparse/fmterror.cc,
	src/neverparse/neverclaimparse.yy,
	src/neverparse/neverclaimscan.ll, src/neverparse/public.hh:
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	Fix copyright.
	* src/tgbatest/Makefile.am (check_PROGRAMS): Remove neverclaimread.
	* src/tgbatest/ltl2tgba.cc: Add option -XN to read a neverclaim.
	* src/tgbatest/readneverclaim.cc: Delete.
	* src/tgbatest/neverclaimread.test: Use ltl2tgba instead of
	neverclaimread.

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2010-05-25  Felix Abecassis  <abecassis@lrde.epita.fr>

	Add never claim parser.

	* src/neverclaimparse/: New directory.
	* src/neverclaimparse/fmterror.cc: New file.  Print a formatted parse
	error on a output stream.
	* src/neverclaimparse/neverclaimparse.yy: New file.  Parser declaration
	for Bison.
	* src/neverclaimparse/neverclaimscan.ll: New file.  Scanner declaration
	for Flex.
	* src/neverclaimparse/public.hh: New file.  Public header for external
	use.
	* src/neverclaimparse/parsedecl.hh: New file.  Header file for
	Flex-Bison interaction.
	* src/neverclaimparse/Makefile.am: New Makefile.
	* src/tgbatest/neverclaimread.cc: New file.  Test program for the
	never claim parser.
	* src/tgbatest/neverclaimread.test: New file.  Test script for the
	never claim parser.
	* src/tgbatest/Makefile.am: Adjust.
	* configure.ac : Adjust.
	* README: Adjust.

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2010-11-06  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Remove `readsave' and fix line numbers in tgbaparse error messages.

	* src/tgbaparse/tgbaparse.yy (line): Fix computation of line number
	for error messages when parsing conditions.
	* src/tgbatest/readsave.test: Check the syntax position of syntax errors
	in the diagnostics.  Use ltl2tgba instead of readsave.
	* src/tgbatest/Makefile.am (check_PROGRAMS): Remove readsave.

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2010-11-06  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	* bench/emptchk/pml2tgba.pl: Adjust to work with Spin 5.2.5.

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2010-10-07  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	* configure.ac: Do not run CF_GXX_WARNINGS unless they are enabled.

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2010-10-07  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Hide the safra_tree_automaton type from the public interface.

	We do that because the declaration of this type, which is local to
	src/tgba/tgbasafracomplement.cc has a member in an anonymous
	namespace, and some versions of g++-4.2 issue a very annoying
	warning about this legitimate code.  See Bug 29365 on GCC's
	Bugzilla.  Report by Silien Hong <silien.hong@lip6.fr>.

	* src/tgba/tgbasafracomplement.hh (safra_tree_automaton): Do not
	forward declare.
	(tgba_safra_complement): Use void* instead of
	safra_tree_automaton*.
	* src/tgba/tgbasafracomplement.cc: static_cast void* to
	safra_tree_automaton* anywhere needed.

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2010-05-20  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Fix the --enable-optimizations check.

	* m4/gccoptim.m4: Add missing AC_LANG_PUSH/AC_LANG_POP around the
	C test.  It was using the C++ compiler instead...

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2010-04-16  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	* NEWS: Typo.

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2010-04-16  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	* NEWS, configure.ac: Bump version to 0.6a.

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2010-04-16  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Release Spot 0.6.

	* NEWS, configure.ac: Bump version to 0.6.

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2010-04-15  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Reorder recent additions to reduccmp.test.

	* src/ltltest/reduccmp.test: Reorder the test added by the
	previous patches.  Some are not supposed to be reduced by
	reductaustr.

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2010-04-15  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Fix a long-standing bug in the stronger rule for R and its recent
	clone for M.

	* src/ltlvisit/contain.cc (reduce_tau03_visitor): Remove
	the stronger rules for R and M.  They were wrong.
	* src/ltltest/reduccmp.test: Test a simpple counterexample.

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2010-04-15  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	More simplifications rules for M.

	* src/ltlvisit/reduce.cc (reduce_visitor): Add the following
	implication rewriting rules:
	a M (b M c) = a M c if a implies b.
	a M (b R c) = a M c if a implies b.
	a R (b R c) = a R c if a implies b.
	a R (b M c) = b M c if b implies a.
	a M (b M c) = b M c if b implies a.
	The latter rule was fixed from an incorrectly copied&pasted
	rule for a M (b R c) = b R c if b implies a (this is wrong).
	Also remove the wrong rule for a W (b U c) = b U c if a implies b.
	* src/ltltest/reduccmp.test: Add more tests.

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2010-04-15  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Speed up syntactic_implication() for constants.

	* src/ltlvisit/syntimpl.cc (syntactic_implication): Do not
	create visitors if arguments are constant.

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2010-04-15  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Fix simplification of "a M true" as Fa.

	* src/ltlvisit/simpfg.cc: Typo.
	* src/ltltest/reduccmp.test: Add more tests.

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2010-04-15  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	* HACKING: Bison 2.4.2 has a bugfix we rely on.

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2010-04-15  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	* src/tgbatest/ltl2tgba.cc (syntax): Add missing black line in
	help output.

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2010-04-14  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	* NEWS: Mention W and M.

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2010-04-14  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	More LTL reductions for W and M.

	* src/ltlvisit/basicreduce.cc: Perform the following reductions:
	(a R b) | Gb = a R b
	(a M b) | Gb = a R b
	(a U b) & Fb = a U b
	(a W b) & Fb = a U b
	* src/ltltest/reduccmp.test: Test them.

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2010-04-12  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	* wrap/python/cgi-bin/ltl2tgba.in: Document W and M operators.

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2010-04-12  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	More LTL reductions for W and M.

	* src/ltlvisit/basicreduce.cc: Perform the following reductions:
	(a U b) & (c W b) = (a & c) U b
	(a W b) & (c W b) = (a & c) W b
	(a R b) | (c M b) = (a | c) R b
	(a M b) | (c M b) = (a | c) M b
	* src/ltltest/reduccmp.test: Test them.

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2010-04-12  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Add LTL reductions for strong release.

	* src/ltlvisit/basicreduce.cc: Perform the following reductions.
	a R (b & F(a)) = a M b
	a M (b & F(a)) = a M b
	a R Fa = Fa
	a M Fa = Fa
	a R b & Fa = a M b
	a R b & a M c = a M (b & c)
	a M b & a M c = a M (b & c)
	* src/ltltest/reduccmp.test: More tests.

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2010-04-12  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Add LTL reductions for weak until.

	* src/ltlvisit/basicreduce.cc: Perform the following reductions.
	a U (b | Ga) = a W b
	a W (b | Ga) = a W b
	a U b | Ga = a W b
	a U b | a W c = a W (b | c)
	a W b | a W c = a W (b | c)
	a U Ga = Ga
	a W Ga = Ga
	* src/ltltest/reduccmp.test: More tests.

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2010-04-07  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Add support for W (weak until) and M (strong release) operators.

	* src/ltlast/binop.cc, src/ltlast/binop.cc: Add support for
	these new operators.
	* src/ltlparse/ltlparse.yy, src/ltlparse/ltlscan.ll: Parse them.
	* src/ltltest/reduccmp.test: Add new tests for W and M.
	* src/ltlvisit/basicreduce.cc, src/ltlvisit/contain.cc,
	src/ltlvisit/lunabbrev.cc, src/ltlvisit/nenoform.cc,
	src/ltlvisit/randomltl.cc, src/ltlvisit/randomltl.hh,
	src/ltlvisit/reduce.cc, src/ltlvisite/simpfg.cc,
	src/ltlvisit/simpfg.hh, src/ltlvisit/syntimpl.cc,
	src/ltlvisit/tostring.cc, src/tgba/formula2bdd.cc,
	src/tgbaalgos/eltl2tgba_lacim.cc, src/tgbaalgos/ltl2taa.cc,
	src/tgbaalgos/ltl2tgba_fm.cc, src/tgbaalgos/ltl2tgba_lacim.cc:
	Add support for W and M.
	* src/tgbatest/ltl2neverclaim.test: Test never claim output
	using LBTT, this is more thorough.  Also we cannot use -N
	any more in the spotlbtt.test.
	* src/tgbatests/ltl2tgba.cc: Define M and W for ELTL.
	* src/tgbatest/ltl2neverclaim.test: Test W and M, and use
	-DS instead of -N, because lbtt-translate does not want
	to translate these operators for tools that masquerade as Spin.

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2010-04-12  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Adjust ltl2tgba.py to call scc_filter() with the "full" option as
	appropriate.

	* wrap/python/spot.i (spot::scc_filter): Make it available.
	* wrap/python/cgi-bin/ltl2tgba.in (reduce_scc): Call scc_filter.
	Use the "full" option unless the show_degen_png or
	show_never_claim are set.  Also reduce_scc the default.

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2010-04-08  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	* src/ltlvisit/basicreduce.cc: Typo in comment.

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2010-04-08  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	* NEWS: Summarize recent noteworthy changes.

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2010-04-07  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Modernize Bison parsers.

	* src/ltlparse/ltlparse.yy, src/tgbaparse/tgbaparse.yy,
	src/evtgbaparse/evtgbaparse.yy, src/eltlparse/eltlparse.yy: Use
	token types for %destructor and %printer.  Remove the yylex hack,
	since %name-prefix is now honored by Bison.  Also remove the
	useless <token> type.  Suggested by Akim Demaille.

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2010-03-10  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Fix column in LTL error messages, it was off by one.

	* src/ltlparse/fmterror.cc (format_parse_errors): Count columns
	starting at 1.  Older Bison used to start at 0 but changed to
	match the GNU Coding Standards.
	* src/ltltest/parseerr.test: Add a test case.

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2010-03-07  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Do not rewrite F(a & GF(b)) = F(a) & GF(b), this can be harmful.

	* src/ltlvisit/basicreduce.cc (basic_reduce_visitor::recurse):
	Disable this rule unconditionally.
	* src/ltltest/reduccmp.test: Adjust tests.

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2010-03-06  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	* src/tgba/tgbatba.cc: Fix English in comments.

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2010-03-06  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Reverse the order of expected acceptance conditions in
	degeneralization.

	* src/tgba/tgbatba.cc (tgba_sba_proxy::tgba_tba_proxy): Build the
	list of acceptance condition in the reverse order.  The order is
	still arbitrary, but the bdd_satone() call seems to output the
	acceptance conditions that are more used first, and this helps the
	degeneralization process.

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2010-03-06  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Tweak precedence of "->" and <->.

	* src/ltlparse/ltlparse.yy: Change the precedence of "->" and
	"<->" so that "a & b -> c" is interpreted as "(a & b) -> c"
	instead of "a & (b -> c)".  The new interpretation is more
	intuitive, and matches that of LBTT.

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2010-03-06  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	* bench/ltl2tgba/formulae.ltl: Fix three formulae to match the
	original paper by Somenzi and Bloem.  Reported by Ruediger Ehlers.

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2010-03-06  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Fix memory leak introduced in yesterday's change.

	* src/tgba/tgbatba.cc (tgba_sba_proxy::tgba_sba_proxy): Do not
	forget to free the initial state after usage.

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2010-03-06  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Keep acceptance conditions on transitions going to accepting SCCs
	by default in scc_filter().

	Doing so helps the degeneralization algorithm, because it will
	have more opportunity to be in an accepting level when it reaches
	the accepting SCCs.

	* src/tgbaalgos/sccfilter.cc (filter_iter::filter_iter): Take a
	remove_all_useless argument.
	(filter_iter::process_link): Use the flag to decide whether to
	filter acceptance conditions going to accepting SCCs.
	(scc_filter): Take a remove_all_useless argument and pass it to
	filter_iter.
	* src/tgbaalgos/sccfilter.hh (filter_iter): Add the new argument
	and document the function.
	* src/tgbatest/tgbatests/ltl2tgba.cc (main): Add option use -R3
	for remove_all_useless=false and add -R3f for
	remove_all_useless=true.
	* src/tgbatest/ltl2tgba.test: Show one case where -R3f makes
	the degeneralization worse than -R3.

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	Simplify F(a)|F(b) as F(a|b).  Add similar rule for G(a)&G(b).

	* src/ltlvisit/basicreduce.cc (basic_reduce_visitor): Replace
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	the FG(a)|FG(b) == F(Ga|Gb) rule by the above more generic one.
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	Add the dual rule for G(a)&G(b), as we had none (this one won't
	improve anything in the translation, but it is more symmetric
	this way).  Also simplify some pointer checks.

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	Better selection of the acceptance of the initial state in SBA.

	* src/tgba/tgbatba.cc (tgba_sba_proxy::tgba_sba_proxy): Set
	cycle_start_ to start in the accepting layer of the degeneralized
	automaton if the initial state has an accepting self-loop.
	Otherwise, starts at the level of the first acceptance condition
	as previously.
	(tgba_sba_proxy::get_init_state): Use cycle_start_.
	* src/tgba/tgbatba.hh (tgba_tba_proxy::a_): Make it protected so
	that we can use it in tgba_sba_proxy::tgba_sba_proxy.
	(tgba_sba_proxy::cycle_start_, tgba_sba_proxy::get_init_state):
	Declare.
	* src/tgbatest/ltl2tgba.test: More tests.

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	Generalize the previous patch to accepting states in SBA.

	* src/tgba/tgbatba.cc (tgba_tba_proxy_succ_iterator::sync_): Move
	the optimization step added by the previous patch outside the
	before the bddtrue check, so that it also applies to accepting
	states in SBA.

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	Optimize tgba_tba_proxy and tgba_sba_proxy for states that share
	an acceptance condition on all outgoing transitions.

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	This was motivated by experiments from Rüdiger Ehlers, showing
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	that "ltl2ba -f 'a U (b U c)'" outperformed "ltl2tgba -f -N -R3 'a
	U (b U c)'".  With this change and the previous one, it is no
	longer the case.

	* src/tgba/tgbatba.cc (tgba_tba_proxy_succ_iterator::aut_): Store
	a pointer to the source automaton and...
	(tgba_tba_proxy_succ_iterator::sync_): ... use it in an extra
	optimization step to gather the acceptance conditions common
	to all outgoing transitions of the destination state, and pretend
	they are on the current (ingoing) transition.
	(tgba_tba_proxy::succ_iter): Pass the
	source automaton to the constructed iterator.
	* src/tgbatest/spotlbtt.test: Test -f -N -R3 -r7.
	* src/tgbatest/ltl2tgba.test: Add a test case for 'a U (b U c)'.

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2010-03-03  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	ltl2tgba: apply -R3 before -D or -DS.

	* src/tgbatest/ltl2tgba.cc (main): Call scc_filter() before the
	degeneralization, because it might remove useless acceptance
	conditions.  I realized this while looking at experiments from
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	Rüdiger Ehlers.
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2010-02-24  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	* src/sanity/style.test: Better fix for the previous error.

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2010-02-23  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Work around a spurious style.test error.

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	* src/saba/sabacomplementtgba.hh (spot): Rewrite Büchi as B\"uchi