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

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

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

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

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2011-01-04  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

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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.

2011-01-04  Alexandre Duret-Lutz  <adl@lrde.epita.fr>
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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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2011-01-04  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

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

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2011-01-04  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	* README: Mention bench/wdba/.

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2011-01-04  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	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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2011-01-04  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	* 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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2011-01-04  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

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

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2011-01-04  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

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

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	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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	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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	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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2010-03-05  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	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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2010-03-05  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

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

	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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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
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	is the BibTex entry used as comment, because some version of sed
	will choke on non-ascii character and cause sanity/style.test to
	fail.

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

	Fix random_graph() not to generate dead states.

	This is actually the third time I fix random_graph().  On
	2007-02-06 I changed the function not to generated dead states,
	but in a way that made it non-deterministic.  On 2010-01-20 I made
	the function deterministic again, but it started to generate dead
	states as a side effect.  This time, I'm making sure that dead
	states won't come again with a test-case that we should have had
	from the beginning.

	* src/tgbaalgos/randomgraph.cc (random_graph): Add an extra
	indirection array, state_randomizer[], so that we can reorder
	states indices after a random selection without actually changing
	the value of the indices used by unreachable_states and
	nodes_to_process.
	* src/tgbatest/randtgba.test: New file.
	* src/tgbatest/Makefile.am: Add randtgba.test.

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2010-02-17  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	ltl2tgba cgi updates.

	* wrap/python/cgi-bin/ltl2tgba.in (dot): Use the value computed by
	configure.
	(os.system): Cleanup stale files only when the form has been
	submitted.
	(list options): Keep track of the selected value.
	(draw_acc_run|print_acc_run): set ec=0 to detect if it has been
	later set or not.  Fix error message when using generalized
	automata with degeneralized emptiness checks.
	* wrap/python/cgi-bin/Makefile.am (ltl2tgba.py): Substitute @DOT@.

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

	* wrap/python/cgi-bin/ltl2tgba.in: Reword description of svg_output.

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

	Add SVG output and language containment options to the cgi script.

	* wrap/python/cgi-bin/ltl2tgba.in (new): Mark new options as new.
	(svg_output, reduce_langcout): Add these new options.
	(render_dot): Support svg_output.

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

	* NEWS: Typo.

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2010-02-01  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	* NEWS, configure.ac: Bump version to 0.5a.

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2010-02-01  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Release Spot 0.5.

	* NEWS, configure.in: Bump version to 0.5.

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2010-01-31  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	* doc/Makefile.am ($(srcdir)/stamp): Do not depend on dot
	explicitly, otherwise the documentation is always built and
	distcheck fails.

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2010-01-31  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	More Doxygen fixes.

	* src/sabaalgos/sabareachiter.hh (process_link): Document argument SI.
	* src/eltlparse/public.hh (format_parse_errors): Remove the
	non-existing eltl_string argument from the description.
	(parse_file): Fix name of parameters in documentation.

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2010-01-31  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Build doxygen pictures with libgd to reduce their size.

	Doxygen only knows how to call dot with -Tpng, while using
	-Tpng:gd produces pictures that are 10 times smaller.  Use a
	simple wrapper around dot to simplify this.

	* doc/dot.in: New file, that wrap the system's dot and replace
	-Tpng by -Tpng:gd.
	* doc/Makefile.am ($(srcdir)/stamp): Depend on dot.
	* doc/Doxyfile.in: Update to 1.6.2.
	(DOT_PATH): Set to @srcdir@ to use doc/dot instead of the
	system's dot.
	* configure.ac: Find the absolute path of dot, and generate
	the doc/dot script.

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2010-01-31  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	More Doxygen fixes.

	* src/tgba/tgbakvcomplement.hh: Use \verbatim around the bibtex
	entry.
	* src/saba/sabacomplementtgba.hh: Use latin1.

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2010-01-30  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	* bench/split-product/Makefile.am (nodist_noinst_DATA): Do not
	depend on files that cannot be built.

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2010-01-30  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Replace spot::ltl_file by a rewritten spot::ltl::ltl_file.

	* src/tgba/tgbafromfile.cc, src/tgba/tgbafromfile.hh: Delete these
	files.
	* src/tgba/Makefile.am: Remove them.
	* src/ltl/ltlparse/ltlfile.hh, src/ltl/ltlparse/ltlfile.cc: New
	files.
	* src/ltl/ltlparse/Makefile.am: Add them.
	* bench/scc-stats/stats.cc, bench/split-product/cutscc.cc: Rewrite
	using the new class.

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2010-01-30  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Check for missing Copyright blurbs, and add them.

	* src/sanity/style.test: Check for missing Copyrights blurbs.
	* src/sanity/Makefile.am: Run style.test before includes.test.
	* iface/gspn/dcswave.test, iface/gspn/dcswaveeltl.test,
	iface/gspn/dcswavefm.test, iface/gspn/dcswaveltl.test,
	iface/gspn/simple.test, iface/gspn/udcsefm.test,
	iface/gspn/udcseltl.test, iface/gspn/udcsfm.test,
	iface/gspn/udcsltl.test, iface/nips/nipstest/dotty.test,
	iface/nips/nipstest/emptiness.test, src/eltltest/acc.test,
	src/eltltest/nfa.test, src/saba/sabacomplementtgba.cc,
	src/sabatest/sabacomplementtgba.cc, src/tgbatest/eltl2tgba.test,
	src/tgbatest/taatgba.test: Add missing Copyright blurb.

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2010-01-30  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	* NEWS: More text.

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2010-01-30  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Touch up some doxygen comments and copyrights.

	* eltlparse/public.hh, saba/saba.hh, tgba/tgbakvcomplement.hh,
	tgba/tgbasafracomplement.hh, tgbaalgos/eltl2tgba_lacim.cc,
	tgbaalgos/eltl2tgba_lacim.hh, tgbaalgos/ltl2taa.hh: Comment
	changes.

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2010-01-30  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Add SCC pruning options to the CGI script.

	* wrap/python/cgi-bin/ltl2tgba.in: Add options to symbolically
	prune unaccepting SCCs in LaCIM, and explicitely pruns unaccepting
	SCCs in all algorithms.
	* src/tgbaalgos/reductgba_sim.hh: Conceal most of the file to
	SWIG.
	* wrap/python/spot.i: Include reductgba_sim.hh.

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2010-01-30  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	* src/evtgbatest/ltl2evtgba.test: Replace * by &.

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2010-01-30  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Make it possible to use the cgi script without installing a web
	server.

	* wrap/python/cgi-bin/ltl2tgba.in: Starts a web server if the
	script is not called as a CGI.  Arrange to load libraries from
	the build directory.  Create the spotimg/ if needed when run as
	a web server.
	* wrap/python/cgi-bin/Makefile.am: Adjust build rule and clean
	the spotimg directory.
	* wrap/python/cgi-bin/README, NEWS: Update.

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2010-01-30  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	More * -> & replacements.

	* src/ltltest/parse.test, src/ltltest/syntimpl.test: Replace * by &.

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2010-01-30  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Remove the theoretically bogus "containment" option of ltl2tgba_fm.

	* src/tgbaalgos/ltl2tgba_fm.cc, src/tgbaalgos/ltl2tgba_fm.hh:
	Remove the containment option.
	* src/tgbafromfile.cc, src/tgbafromfile.hh: Remove the
	containment_ member.
	* src/tgbatest/ltl2tgba.cc (syntax): Remove -c option for
	FM algorithm, use it exclusively for TAA.

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2010-01-30  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	* src/tgba/tgbasafracomplement.hh: Add missing copyright and
	fix some comments.

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2010-01-30  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Rename tgba_complement as tgba_kv_complement.

	* src/tgba/tgbacomplement.hh, src/tgba/tgbacomplement.cc: Rename
	as...
	* src/tgba/tgbakvcomplement.hh, src/tgba/tgbakvcomplement.cc:
	... these. It makes more sense since we also have
	tgba_safra_complement.
	* src/tgba/Makefile.am, src/tgbatest/complement.cc, NEWS: Adjust.

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2010-01-30  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Do not recognize "*" as "and".  This leaves room for an
	implementation of rational operators in a future version.

	* src/ltlparse/ltlscan.ll: Do not recognize "*".
	* wrap/python/cgi-bin/ltl2tgba.in: Undocument it.
	* NEWS: Mention this.
	* src/tgbatest/kv.test, src/tgbatest/ltl2tgba.test,
	src/tgbatest/reductgba.test: Replace "*" by "&".

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2010-01-30  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Make Couvreur/FM the default translation.

	* src/tgbatest/ltl2tgba.cc (syntax, main): Do it.
	* NEWS: Mention it.
	* src/tgbatest/emptchk.test: Add missing -l.

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2010-01-30  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Overhaul LaCIM's ELTL options.

	* src/tgbatest/ltl2tgba.cc (syntax, main): Introduce -le to select
	this algorithm and -lo to add the default LTL operators.  This
	replace the undocumented hack to add LTL operators when the
	formula with read for command-line, or the automaton was output
	for LBTT.
	* src/tgbatest/eltl2tgba.test, src/tgbatest/spotlbtt.test: Update
	call syntax.
	* NEWS: Mention -le, -lo, and -taa.

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2010-01-30  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Touch up -R3b handling.

	* src/tgbatest/ltl2tgba.cc (syntax): Move -R3b with the other
	LaCIM options.
	(main): Speak of "symbolic SCC pruning" instead of "deleting
	unaccepting SCC", and do that right after the translation, before
	degeneralization.  Also error out when -R3b is used on non
	symbolic automata.

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2010-01-29  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Update some text files for upcoming 0.5.

	* NEWS: Update for upcoming 0.5.
	* HACKING: Update Automake requirement.
	* README: Mention the mailing list.
	* bench/ltlcounter/README: More text.
	* configure.ac: Report bugs to spot@lrde.epita.fr.

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2010-01-29  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Rename wrap/python/cgi/ as wrap/python/cgi-bin/.

	* wrap/python/cgi/: Rename as ...
	* wrap/python/cgi-bin/: ... this.
	* configure.ac, spot/wrap/python/Makefile.am, README: Adjust.

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2010-01-29  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	* src/tgbaalgos/gtec/gtec.hh: Fix copyright.

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2010-01-29  Felix Abecassis <felix.abecassis@lrde.epita.fr>

	* src/tgba/taatgba.cc, src/tgba/taatbga.hh: Fix a memory issue on
	Darwin.

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2010-01-25  Damien Lefortier <dam@lrde.epita.fr>

	* wrap/python/cgi/ltl2tgba.in, wrap/python/spot.i: Add a new
	translation algorithm: Tauriainen/TAA.

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2010-01-25  Damien Lefortier <dam@lrde.epita.fr>

	* wrap/python/cgi/ltl2tgba.in: Use the uuid Python module instead
	of the UNIQUE_ID environment variable to avoid being
	Apache-specific.

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2010-01-24  Guillaume Sadegh  <sadegh@lrde.epita.fr>

	Fix copyrights.

	* bench/Makefile.am, bench/gspn-ssp/Makefile.am,
	bench/gspn-ssp/defs.in, bench/scc-stats/Makefile.am,
	bench/split-product/Makefile.am, configure.ac,
	iface/Makefile.am, iface/gspn/Makefile.am, iface/gspn/ssp.hh,
	iface/nips/Makefile.am, iface/nips/common.cc,
	iface/nips/common.hh, iface/nips/dottynips.cc,
	iface/nips/nips.cc, iface/nips/nips.hh, src/Makefile.am,
	src/eltlparse/Makefile.am, src/eltlparse/eltlparse.yy,
	src/eltlparse/eltlscan.ll, src/eltlparse/fmterror.cc,
	src/eltlparse/parsedecl.hh, src/eltltest/Makefile.am,
	src/eltltest/defs.in, src/eltltest/nfa.cc, src/evtgba/evtgba.hh,
	src/evtgba/product.cc, src/evtgba/product.hh,
	src/evtgbaalgos/tgba2evtgba.cc, src/evtgbaparse/Makefile.am,
	src/evtgbaparse/evtgbaparse.yy, src/evtgbatest/defs.in,
	src/evtgbatest/explicit.test, src/evtgbatest/ltl2evtgba.cc,
	src/evtgbatest/ltl2evtgba.test, src/evtgbatest/product.cc,
	src/evtgbatest/product.test, src/evtgbatest/readsave.cc,
	src/evtgbatest/readsave.test, src/ltlast/atomic_prop.cc,
	src/ltlast/atomic_prop.hh, src/ltlast/binop.cc,
	src/ltlast/binop.hh, src/ltlast/constant.cc,
	src/ltlast/constant.hh, src/ltlast/formula.cc,
	src/ltlast/formula.hh, src/ltlast/formula_tree.cc,
	src/ltlast/formula_tree.hh, src/ltlast/multop.cc,
	src/ltlast/multop.hh, src/ltlast/nfa.cc, src/ltlast/nfa.hh,
	src/ltlast/unop.cc, src/ltlast/unop.hh, src/ltlenv/declenv.cc,
	src/ltlenv/declenv.hh, src/ltlenv/environment.hh,
	src/ltlparse/Makefile.am, src/ltlparse/ltlparse.yy,
	src/ltltest/Makefile.am, src/ltltest/defs.in,
	src/ltltest/equals.cc, src/ltltest/equals.test,
	src/ltltest/lunabbrev.test, src/ltltest/nenoform.test,
	src/ltltest/parse.test, src/ltltest/parseerr.test,
	src/ltltest/randltl.cc, src/ltltest/readltl.cc,
	src/ltltest/reduccmp.test, src/ltltest/syntimpl.cc,
	src/ltltest/syntimpl.test, src/ltltest/tostring.cc,
	src/ltltest/tostring.test, src/ltltest/tunabbrev.test,
	src/ltltest/tunenoform.test, src/ltlvisit/basicreduce.cc,
	src/ltlvisit/clone.cc, src/ltlvisit/clone.hh,
	src/ltlvisit/contain.cc, src/ltlvisit/destroy.cc,
	src/ltlvisit/destroy.hh, src/ltlvisit/lunabbrev.cc,
	src/ltlvisit/nenoform.cc, src/ltlvisit/randomltl.cc,
	src/ltlvisit/reduce.cc, src/ltlvisit/syntimpl.cc,
	src/ltlvisit/tostring.cc, src/misc/bddalloc.cc,
	src/misc/bddop.cc, src/misc/bddop.hh, src/misc/freelist.hh,
	src/misc/hash.hh, src/misc/minato.cc, src/misc/minato.hh,
	src/misc/optionmap.cc, src/misc/timer.cc, src/misc/timer.hh,
	src/saba/Makefile.am, src/saba/explicitstateconjunction.cc,
	src/saba/explicitstateconjunction.hh, src/saba/saba.cc,
	src/saba/saba.hh, src/saba/sabacomplementtgba.cc,
	src/saba/sabacomplementtgba.hh, src/saba/sabastate.hh,
	src/saba/sabasucciter.hh, src/sabaalgos/Makefile.am,
	src/sabaalgos/sabadotty.cc, src/sabaalgos/sabadotty.hh,
	src/sabaalgos/sabareachiter.cc, src/sabaalgos/sabareachiter.hh,
	src/sabatest/Makefile.am, src/sabatest/defs.in,
	src/sanity/Makefile.am, src/tgba/Makefile.am,
	src/tgba/bdddict.cc, src/tgba/bddprint.cc,
	src/tgba/formula2bdd.cc, src/tgba/state.hh,
	src/tgba/succiterconcrete.cc, src/tgba/taatgba.hh,
	src/tgba/tgba.hh, src/tgba/tgbabddconcretefactory.cc,
	src/tgba/tgbabddconcretefactory.hh, src/tgba/tgbacomplement.cc,
	src/tgba/tgbacomplement.hh, src/tgba/tgbaexplicit.cc,
	src/tgba/tgbaexplicit.hh, src/tgba/tgbaproduct.cc,
	src/tgba/tgbareduc.cc, src/tgba/tgbareduc.hh,
	src/tgba/tgbasafracomplement.cc, src/tgba/tgbasgba.cc,
	src/tgba/tgbasgba.hh, src/tgba/tgbaunion.cc,
	src/tgba/tgbaunion.hh, src/tgbaalgos/dupexp.cc,
	src/tgbaalgos/eltl2tgba_lacim.cc,
	src/tgbaalgos/eltl2tgba_lacim.hh, src/tgbaalgos/emptiness.cc,
	src/tgbaalgos/gtec/gtec.cc, src/tgbaalgos/ltl2taa.cc,
	src/tgbaalgos/ltl2taa.hh, src/tgbaalgos/ltl2tgba_lacim.cc,
	src/tgbaalgos/neverclaim.cc, src/tgbaalgos/neverclaim.hh,
	src/tgbaalgos/powerset.cc, src/tgbaalgos/reachiter.cc,
	src/tgbaalgos/reachiter.hh, src/tgbaalgos/reductgba_sim.cc,
	src/tgbaalgos/reductgba_sim.hh,
	src/tgbaalgos/reductgba_sim_del.cc, src/tgbaalgos/stats.cc,
	src/tgbaalgos/stats.hh, src/tgbaparse/Makefile.am,
	src/tgbaparse/tgbaparse.yy, src/tgbatest/Makefile.am,
	src/tgbatest/bddprod.test, src/tgbatest/complementation.cc,
	src/tgbatest/complementation.test, src/tgbatest/defs.in,
	src/tgbatest/dfs.test, src/tgbatest/dupexp.test,
	src/tgbatest/explicit.cc, src/tgbatest/explicit.test,
	src/tgbatest/explpro3.test, src/tgbatest/explpro4.test,
	src/tgbatest/explprod.cc, src/tgbatest/explprod.test,
	src/tgbatest/ltl2neverclaim.test, src/tgbatest/ltl2tgba.cc,
	src/tgbatest/ltl2tgba.test, src/tgbatest/ltlprod.cc,
	src/tgbatest/ltlprod.test, src/tgbatest/mixprod.cc,
	src/tgbatest/mixprod.test, src/tgbatest/powerset.cc,
	src/tgbatest/readsave.cc, src/tgbatest/readsave.test,
	src/tgbatest/reduccmp.test, src/tgbatest/reductgba.cc,
	src/tgbatest/reductgba.test, src/tgbatest/taatgba.cc,
	src/tgbatest/tgbaread.cc, src/tgbatest/tgbaread.test,
	src/tgbatest/tripprod.cc, src/tgbatest/tripprod.test,
	wrap/python/cgi/ltl2tgba.in, wrap/python/tests/ltl2tgba.py,
	wrap/python/tests/ltlparse.py, wrap/python/tests/ltlsimple.py:
	Fix copyrights.

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2010-01-24  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	* src/tgbaalgos/ltl2tgba_fm.cc: More comments.

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2010-01-24  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

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	Check that all directories are documented.

	* src/sanity/readme.test: For each AC_OUTPUT Makefile, check that
	the directory is documented in README.  Also skip non distributed
	directories in readme.test.
	* README: Fit on 80 columns.

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	* README: Typo.

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2010-01-24  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	* src/sanity/Makefile.am (EXTRA_DIST): Distribute readme.test.

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2010-01-24  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	* README: Add descriptions for subdirectories of bench/, src/sanity,
	and src/kripke.

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2010-01-24  Guillaume Sadegh  <sadegh@lrde.epita.fr>

	* src/sanity/readme.test: A script to check whether all the
	directories referenced in README exist.
	* src/sanity/Makefile.am: Adjust to call `readme.test' when make
	check is invoked.

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2010-01-24  Guillaume Sadegh  <sadegh@lrde.epita.fr>

	Update the README.

	* README: Reference src/saba/, src/sabaalgos/, src/sabatest/,
	iface/nips/, iface/nips/nipstest/ and iface/nips/nips_vm/.

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2010-01-22  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Turn parse_error_list into an opaque type for Swig.  This
	kills a memory leak warning from swig/python.

	* src/ltlparse/public.hh (parse_error_list): Declare
	as an empty struct for Swig.
	* wrap/python/tests/ltlparse.py: Fix copyright.

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2010-01-22  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Fix the computation of the length of multops.

	* src/ltlvisit/length.cc (visit(multop*)): New function. "a & b &
	c" has length 5, not 4, even though it is stored as And(a,b,c).
	This caused reduc.test to fail on some formulae.

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2010-01-21  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Please the style checks...

	* src/tgbaalgos/randomgraph.cc: Fix the copyright and make it fit
	on 80 columns.

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2010-01-21  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	* src/ltltest/reduc.cc (main): Fix harmless memory leak introduced
	today.

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2010-01-21  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Fix taa_tgba_formula's destructor.

	* src/tgba/taatgba.cc (taa_tgba_formula::~taa_tgba_formula):
	Really destroy all formulae, not only half of them.

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2010-01-21  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	* src/tgbatest/randtgba.cc: Do not include <string> twice.

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	Speedup reduc.test by not spawning one process per formula.

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	* src/ltltest/reduc.cc: Add an option -f to read a lot of
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	formulae from a file.  Running a process for each formula was
	too slow.  Also add an option -h to hide reduced formulae.
	* src/ltltest/reduc.test: Simplify accordingly.

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2010-01-21  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Move the last test from emptchk.test to emptchke.test.

	* src/tgbatest/emptchk.test: Move the newly added test ...
	* src/tgbatest/emptchke.test: ... here, with other explicit test.
	Also test more algorithms.

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2010-01-21  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Fix a memory leak in Cou99 statistics.

	* src/tgbaalgos/gtec/ce.cc (couvreur99_check_result::acss_states):
	Delete the iterator after using it.
	* src/tgbatest/emptchkr.test: Run 'randtgba -z' with valgrind too.

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2010-01-21  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Fix a longstanding bug in our implementation of GV04.

	* src/tgbaalgos/gv04.cc (push): Fix the tracking of the accepting
	link.  This bug was discovered on a random generated graph with
	a complex accepting cycle.
	* src/tgbatest/emptchk.test: Add the troublesome graph as
	test case.

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	When iterating a hash_map, be careful not to delete i->first
	before doing ++i to avoid memory issues.

	* src/tgba/taatgba.cc, src/tgba/taatgba.hh,
	src/tgba/tgbaexplicit.cc, src/tgba/tgbaexplicit.hh: Fix them.

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2010-01-20  Damien Lefortier <dam@lrde.epita.fr>

	Minor fixes to compile with GCC 3.3

	* src/ltlast/automatop.cc, src/ltlast/automatop.hh: Rename nfa as
	get_nfa to avoid a name clash with the `nfa' class.
	* src/ltlvisit/clone.cc, src/ltlvisit/nenoform.cc,
	src/ltlvisit/tostring.cc, src/tgbaalgos/eltl2tgba_lacim.cc: Use
	get_nfa instead of nfa.
	* src/tgba/tgbasafracomplement.cc: Don't use a
	const_reverse_iterator.

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	Remove some non-determinism in random_graph()

	* src/tgbaalgos/randomgraph.cc (random_graph): Revert the part of
	the patch from 2007-02-06 which silently replaced the use of state
	index by state pointers.  Storing states pointer in this map cause
	some non-determinism because of the memory layout.  It was almost
	impossible to reproduce bugs found by tests based on randtgba.

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	* src/tgbaalgos/ltl2taa.cc: Fix the previous patch.

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	* src/tgba/taatgba.cc, src/tgba/taatgba.hh: Fix memory issues
	occuring when labels are pointers.
	* src/tgbaalgos/ltl2taa.cc: Fix a bug.
	* src/tgbatest/ltl2tgba.cc: Fix a bug.

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	* src/saba/sabacomplementtgba.cc: Fix a bug.

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	Use taa_tgba_formula instead of taa_tgba_string in ltl_to_taa to
	speed up a little the translation.

	* src/tgbaalgos/ltl2taa.cc: Adjust.  Also fix a bug with
	acceptance conditions in all_n_tuples.
	* src/tgba/taatgba.cc, src/tgba/taatgba.hh: Adjust.

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2010-01-16  Damien Lefortier <dam@lrde.epita.fr>

	Introduce taa_tgba_labelled<label> so that we can build
	taa_tgba instances labelled by other objects than strings
	in the same way Alexandre did for tgba_explicit.

	* src/tgba/taatgba.cc, src/tgba/taatgba.hh: Split taa_tgba in two
	levels: taa_tgba with no label and taa_tgba_labelled templated by
	the type of the label.  Define taa_tgba_string (with the interface
	of the former taa_tgba class) and taa_tgba_formula for future use
	in ltl2taa.cc.
	* src/tgbaalgos/ltl2taa.cc, src/tgbatest/taatgba.cc: Adjust to use
	taa_tgba_string.

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	Fix a longstanding bug reported by Guillaume Sadegh.

	* src/eltlparse/eltlscan.ll: Fix a typo.

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2010-01-05  Damien Lefortier <dam@lrde.epita.fr>

	Merge eltl2tgba.cc into ltl2tgba.cc.

	* src/tgbatest/eltl2tgba.cc: Remove.
	* src/tgbatest/Makefile.am: Adjust.
	* src/tgbatest/ltl2tgba.cc: New option: -xltl to translate an
	extended LTL instead of an LTL, a feature previously offered by
	eltl2tgba.cc. Also: -R3b to use delete_unaccepting_scc.
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	* src/tgbatest/spotlbtt.test, src/tgbatest/eltl2tgba.test: Adjust.
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	* src/tgba/tgbabddcoredata.cc (delete_unaccepting_scc): Fix a bug.
	* src/tgbatest/spotlbtt.test: Use the above function with LaCIM
	for ELTL which greatly reduce the size of the automata!

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	* src/misc/timer.hh (timer::timer): Initialize running...

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	* src/Makefile.am (SUBDIRS): Fix missing ".", mistakenly removed
	by previous patch.

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	An algorithm to complement TGBA into SABA.

	* src/saba/sabacomplementtgba.hh,
	src/saba/sabacomplementtgba.cc: New.  The algorithm.
	* src/saba/Makefile.am: Adjust.
	* src/sabatest/sabacomplementtgba.cc, src/sabatest/Makefile.am,
	src/sabatest/defs.in: New.  Test the algorithm.
	* configure.ac, src/Makefile.am: Adjust to the new directory
	`sabatest'.

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	Add a new type of automata: State-labeled Alternating Büchi
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	Automata (SABA).

	* src/saba/saba.hh, src/saba/saba.cc, src/saba/sabastate.hh,
	src/saba/sabasucciter.hh: New.  Interface for
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	SABA (State-labeled Alternating Büchi Automata).
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	* src/saba/explicitstateconjunction.cc,
	src/saba/explicitstateconjunction.hh: New.  Default
	implementation for a conjunction of states.
	* src/saba/Makefile.am: New.
	* src/Makefile.am, configure.ac: Adjust.
	* src/sabaalgos/sabareachiter.cc,
	src/sabaalgos/sabareachiter.hh: New.  Iterate over all reachable
	states of a spot::saba.
	* src/sabaalgos/sabadotty.cc, src/sabaalgos/sabadotty.hh: New.
	Print reachable states in dot format.
	* src/sabaalgos/Makefile.am: New.

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2009-11-27  Guillaume Sadegh  <sadegh@lrde.epita.fr>

	Rename the class taa as taa_tgba.

	* src/tgba/taa.cc, src/tgba/taa.hh: Rename as ...
	* src/tgba/taatgba.cc, src/tgba/taatgba.hh: ... these, and
	rename the class taa as taa_tgba.
	* src/tgbaalgos/ltl2taa.cc, src/tgbaalgos/ltl2taa.hh,
	src/tgbaalgos/Makefile.am: Adjust.
	* src/tgbatest/ltl2tgba.cc, src/tgbatest/Makefile.am: Adjust.
	* src/tgbatest/taa.test: Rename as ...
	* src/tgbatest/taatgba.test ... this.
	* src/tgbatest/taa.cc: Rename as ...
	* src/tgbatest/taatgba.cc ... this, and adjust.

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	* src/tgbatest/ltl2tgba.cc (main): Fix typo to re-enable
	reductions by simulation.

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	* m4/buddy.m4 (AX_CHECK_BUDDY): Check for bdd_satprefix, the
	latest function added to BuDDy.

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	* src/tgbatest/ltl2tgba.cc (main): Stop the SCC timer.  I mean
	really stop it!

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	Detect running timers, and stop a timer in ltl2tgba.

	* src/misc/timer.hh (time_info::running): New attribute.
	(time_info::start, time_info::stop): Update and check
	time_info::running.
	* src/misc/timer.cc (timer_map::print): Mark running timers with
	a "+" in the output.
	* src/tgbatest/ltl2tgba.cc (main): Rename the name of the timers
	for SCC and simulation reduction, and actually stop the SCC timer.

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	* src/tgbaalgos/sccfilter.cc (create_transition): Do not clone
	the same node twice when dealing with loops.

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	Use bdd_satprefix() to speedup minato on BDDs that are almost cubes.

	* src/misc/minato.cc (minato_isop::minato_isop): Call bdd_satprefix.
	(minato_isop::next): Avoid useless intermediate variables.
	* src/misc/minato.hh: Typo in comments.

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2009-11-23  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Specialize scc_filter when handling tgba_explicit_formula automata.

	If the input is a tgba_explicit_formula we can output a
	tgba_explicit_formula too, and we want to do that because it is
	more space efficient.

	* src/tgba/tgbaexplicit.hh (get_label): New method.
	* src/tgbaalgos/sccfilter.cc (create_transition): New function,
	to handle tgba_explicit_formula and tgba_explicit_string output
	differently.
	(filter_iter): Template it on the output tgba type, and adjust
	to call create_transition.
	(scc_filter): Use filter_iter<tgba_explicit_formula> or
	filter_iter<tgba_explicit_string> depending on the input tgba
	type.

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2009-11-20  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Strip useless acceptance conditions in scc_filter().

	A useless acceptance conditions is one that is always implied by
	another.

	* src/misc/bddop.hh, src/misc/bddop.cc
	(compute_neg_acceptance_conditions): New function.
	* src/tgba/tgbaexplicit.hh, src/tgba/tgbaexplicit.cc
	(set_acceptance_conditions): New function.
	* src/tgbaalgos/scc.cc (build_map, build_scc_stats, dump_scc_dot):
	Keep track of useful acceptance conditions.
	(useful_acc_of): New function.
	* src/tgbaalgos/scc.hh (scc_stats, scc_map::scc::useful_scc): New
	attributes.
	* src/tgbaalgos/sccfilter.cc (filter_iter): Adjust to filter
	useless acceptance conditions.
	(scc_filter): Compute useful acceptance conditions and pass them
	to filter_iter.

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	* src/tgbaalgos/sccfilter.cc (scc_filter): Merge transitions
	after removing acceptance conditions.

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	Remove prune_scc(), prune_acc(), and related fonctions.

	* src/tgba/tgbareduc.cc, src/tgba/tgbareduc.hh (prune_scc,
	prune_acc, remove_component, compute_scc, remove_acc,
	is_not_accepting, delete_scc, is_terminal, remove_scc,
	display_scc): Remove anything related to the simplification of
	SCCs.

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2009-11-18  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Replace prune_scc() by scc_filter().

	prune_scc() leaked memory and failed to remove chains of useless SCCs.

	* src/tgbaalgos/reductgba_sim.cc (reduc_tgba_sim): Call
	scc_filter() instead of prune_scc(), and do it before running
	any simulation-based reduction.
	* src/tgbaalgos/reductgba_sim.hh (reduc_tgba_sim): Return a const
	tgba*.
	* src/tgbatest/ltl2tgba.cc, src/tgbatest/reductgba.cc: Call
	scc_filter() instead of prune_scc().
	* src/tgbatest/scc.test: Add two more tests that failed with
	prune_scc().

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2009-11-18  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Quick implementation of a "useless SCC" filter using scc_map.

	* src/tgbaalgos/sccfilter.hh, src/tgbaalgos/sccfilter.cc: New
	files.
	* src/tgbaalgos/Makefile.am: Add them.

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2009-11-18  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Fix acceptance check in scc_map: trivial SCCs are not accepting.
	Also compute useless SCCs.

	* src/tgbaalgos/scc.cc (scc_map::scc::trivial): New field.
	(scc_stats::useless_scc_map): New field.
	* src/tgbaalgos/scc.cc (scc_map::build_map): Mark SCCs that are
	not trivial.
	(scc_map::accepting): Always return false for trivial SCC.
	(build_scc_stats): Fill in useless_scc_map.

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2009-11-18  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Make it easy to filter states while iterating over an automaton.

	* src/tgbaalgos/reachiter.hh (tgba_reachable_iterator::want_state):
	New method.
	* src/tgbaalgos/reachiter.cc (tgba_reachable_iterator::want_state):
	Implement it.
	(tgba_reachable_iterator::run): Call want_state before processing
	a state.

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2009-11-17  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	* src/tgbaalgos/cutscc.cc (cut_scc): Pass `s' by reference instead
	of by pointer.
	* src/tgbaalgos/cutscc.cc, src/tgbaalgos/cutscc.hh: Fix copyright
	header.

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2009-11-13  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Replace the hash key construction of LTL formulae by a simple
	counter updated each time we create a new (unique) formula.

	Doing so saves a lot of memory during the translation of the
	ltlcounter formulae, because the formulae are quite big and
	storing a string representation of each formula on its node was a
	bad idea.  For instance with n=12, the translation now uses 40MB
	where it used 290MB.  (Note: in both cases, 20MB is being used by
	the BDD cache.)

	* src/ltlast/formula.hh (hash_key_): Rename as ...
	(count_): ... this.
	(hash): Adjust.
	(max_count): New static variable to count the number of
	formulae created.
	(formula): Update max_count and set count_.
	(dump): Make it a virtual pure method.
	(set_key_): Remove.
	(formula_ptr_less_than): Speed up and return false when
	the two formula pointer are equal.
	* src/ltlast/formula.cc (set_key_, dump): Remove.
	* src/ltlast/atomic_prop.cc, src/ltlast/atomic_prop.hh,
	src/ltlast/automatop.cc, src/ltlast/automatop.hh,
	src/ltlast/binop.cc, src/ltlast/binop.hh, src/ltlast/constant.cc,
	src/ltlast/constant.hh, src/ltlast/multop.cc,
	src/ltlast/multop.hh, src/ltlast/unop.cc, src/ltlast/unop.hh:
	Empty the constructor (do not precompute the dump_ anymore),
	and add a dump() implementation.

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2009-11-12  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Use -l wherever we where expecting ltl2tgba to default to LaCIM.

	* bench/ltl2tgba/algorithms: Use -l for all LaCIM invocations.
	* src/tgbatest/dupexp.test, src/tgbatest/emptchk.test,
	src/tgbatest/spotlbtt.test: Likewise.

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2009-11-12  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Cleanup the help of ltl2tgba.

	* src/tgbatest/ltl2tgba.cc (syntax): Reorganize the help text, so
	that we can find options without resorting to grep...  Also
	cleanup the program name if it is a libtool wrapper.

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2009-11-12  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	* src/tgbatest/ltl2tgba.cc (-l): New option to select the lacim
	translation.  It still is the default translation.
	(opt_fm, opt_taa): Replace these two variables by ...
	(translation): ... this enum.  And use a switch to call the
	correct translation.

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2009-11-11  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Remove python bindings for ltl::clone and ltl::destroy.

	* wrap/python/spot.i: Do not include clone.hh and destroy.hh.

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2009-11-10  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Typo from a previous patch.

	* src/tgbaalgos/ltl2tgba_fm.cc (ltl_to_tgba_fm): Fix a typo
	introduced three patches ago in the handling of unobserved events.

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2009-11-10  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Do not comment states in the never claim by default.  It takes too
	much time when the formula is large, and it is useless when the
	purpose is model-checking with Spin.

	* src/tgbaalgos/neverclaim.hh (never_claim_reachable): Add the
	comments option.
	* src/tgbaalgos/neverclaim.cc (never_claim_bfs,
	never_claim_reachable): Honor the comment option.
	* src/tgba/tests/ltl2tgba.cc (-N): Do not comment states.
	(-NN) New option to output a commented never claim.

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2009-11-10  Damien Lefortier <dam@lrde.epita.fr>

	* src/tgba/taa.cc, src/tgba/taa.hh: Fix it.
	* src/tgbaalgos/ltl2taa.cc: Do NOT use the same bdd_dict for both
	the translation and the language containment checker.
	* src/tgbatest/spotlbtt.test: Update TAA related tests.

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2009-11-10  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Use tgba_explicit_formula instead of tgba_explicit_string in FM.

	This gives a nice speedup (>1.4) in the ltlcounter benchmark,
	because we no longer have to generate a copy the string
	representations of the LTL formulae.

	* src/tgbaalgos/ltl2tgba_fm.cc: Adjust.  Also get rid of the
	formulae_seen map, since we can now ask the tgba_explicit_formula
	if it knows the state.

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2009-11-10  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Ease debugging of LTL formulae leaks.

	* src/tgbatest/ltl2tgba.cc: Dump all LTLinstances with their
	reference count.

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2009-11-10  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Introduce tgba_explicit_labelled<label> so that we can build
	tgba_explicit instances labelled by other objects than strings.

	* src/tgba/tgbaexplicit.cc, src/tgba/tgbaexplicit.hh:
	Split tgba_explicit in two levels: tgba_explicit with unlabelled
	states, and tgba_explicit_labelled templated by the type of
	the label.  Define tgba_explicit_string (with the interface
	of the former tgba_explicit class) and tgba_explicit_formula
	for future use in ltl2tgba.cc.
	* src/tgba/tgbareduc.cc, src/tgba/tgbareduc.hh,
	src/tgbaalgos/cutscc.cc, src/tgbaalgos/dupexp.cc,
	src/tgbaalgos/emptiness.cc, src/tgbaalgos/ltl2tgba_fm.cc,
	src/tgbaalgos/powerset.cc, src/tgbaalgos/randomgraph.cc,
	src/tgbaparse/public.hh, src/tgbaparse/tgbaparse.yy,
	src/tgbatest/explicit.cc, src/tgbatest/ltl2tgba.cc: Adjust to
	use tgba_explicit_string when appropriate.

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2009-11-09  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Do not use the Boost macro from the Autoconf macro archive.

	* m4/boost.m4: Rewrite like I already did in Vaucanson.

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2009-11-09  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	* src/tgbatest/ltlcounter.test (run): Do not run with n=12, as
	the test case might become too slow for the autobuilder.

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2009-11-06  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Add a benchmark using Kristin Y. Rozier's LTLcounter scripts.

	* bench/ltlcounter/README, bench/ltlcounter/run,
	bench/ltlcounter/plot.gnu, bench/ltlcounter/defs.in,
	bench/ltlcounter/Makefile.am: New files.
	* bench/Makefile.am (SUBDIRS): Add ltlcounter.
	* configure.ac (AC_CONFIG_FILES): Adjust.
	* THANKS: Add her.

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2009-11-06  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Use a timer to clock the different phases of the translation.

	* src/tgbatest/ltl2tgba.cc: Add option -T.

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2009-11-08  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Deprecate ltl::destroy(f) in favor of f->destroy()

	* src/ltlast/formula.cc, src/ltlast/formula.hh (formula::clone):
	Transform this static function into a member function.
	* src/ltlvisit/destroy.hh (destroy): Document and declare as
	deprecated.
	* bench/split-product/cutscc.cc, iface/gspn/ltlgspn.cc,
	src/eltlparse/eltlparse.yy, src/eltltest/acc.cc,
	src/evtgbaalgos/tgba2evtgba.cc, src/evtgbatest/ltl2evtgba.cc,
	src/ltlast/automatop.cc, src/ltlast/binop.cc,
	src/ltlast/multop.cc, src/ltlast/unop.cc, src/ltlenv/declenv.cc,
	src/ltlenv/declenv.hh, src/ltlparse/ltlparse.yy,
	src/ltltest/equals.cc, src/ltltest/randltl.cc,
	src/ltltest/readltl.cc, src/ltltest/reduc.cc,
	src/ltltest/syntimpl.cc, src/ltltest/tostring.cc,
	src/ltlvisit/destroy.cc src/ltlvisit/basicreduce.cc,
	src/ltlvisit/contain.cc, src/ltlvisit/reduce.cc,
	src/ltlvisit/syntimpl.cc, src/tgba/bdddict.cc,
	src/tgba/bddprint.cc, src/tgba/taa.cc,
	src/tgba/tgbabddconcretefactory.cc, src/tgba/tgbaexplicit.cc,
	src/tgba/tgbafromfile.cc, src/tgbaalgos/eltl2tgba_lacim.cc,
	src/tgbaalgos/ltl2taa.cc, src/tgbaalgos/ltl2tgba_fm.cc,
	src/tgbaalgos/ltl2tgba_lacim.cc, src/tgbaalgos/neverclaim.cc,
	src/tgbaalgos/randomgraph.cc, src/tgbaparse/tgbaparse.yy,
	src/tgbatest/complementation.cc, src/tgbatest/eltl2tgba.cc,
	src/tgbatest/ltl2tgba.cc, src/tgbatest/ltlprod.cc,
	src/tgbatest/mixprod.cc, src/tgbatest/randtgba.cc,
	src/tgbatest/reductgba.cc, wrap/python/cgi/ltl2tgba.in,
	wrap/python/tests/ltl2tgba.py, wrap/python/tests/ltlparse.py,
	wrap/python/tests/ltlsimple.py: Adjust destroy() usage, and remove
	the #include "destroy.hh" when appropriate.

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2009-11-08  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Deprecate ltl::clone(f) in favor of f->clone().

	* src/ltlvisit/clone.hh (clone): Document and declare as deprecated.
	* src/ltlast/formula_tree.cc, src/ltlvisit/basicreduce.cc,
	src/ltlvisit/clone.cc, src/ltlvisit/contain.cc,
	src/ltlvisit/lunabbrev.cc, src/ltlvisit/reduce.cc,
	src/ltlvisit/syntimpl.cc, src/tgba/bdddict.cc,
	src/tgba/formula2bdd.cc, src/tgba/tgbabddconcretefactory.cc,
	src/tgbaalgos/ltl2taa.cc, src/tgbaalgos/ltl2tgba_fm.cc,
	src/tgbatest/complementation.cc, wrap/python/tests/ltlsimple.py:
	Adjust clone() usage, and remove the #include "clone.hh" when
	appropriate.

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2009-11-08  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Make it possible to clone const formulae.

	* src/ltlast/formula.hh, src/ltlast/formula.cc (clone): Declare
	as const.

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2009-11-08  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Rename formula::ref and formula::unref as formula::clone
	and formula::destroy.

	* src/ltlast/atomic_prop.cc, src/ltlast/automatop.cc,
	src/ltlast/binop.cc, src/ltlast/formula.hh, src/ltlast/formula.cc,
	src/ltlast/multop.cc, src/ltlast/unop.cc, src/ltlenv/declenv.cc,
	src/ltlvisit/basicreduce.cc, src/ltlvisit/clone.cc,
	src/ltlvisit/destroy.cc, src/ltlvisit/nenoform.cc,
	src/ltlvisit/randomltl.cc, src/ltlvisit/reduce.cc,
	src/tgbatest/randtgba.cc: Adjust.

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2009-11-07  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Change the way references are counted to speedup cloning.

	Before this patch, every time you cloned a formula, the clone
	visitor would recurse into the entire AST to increment the
	reference count of all nodes.  When running ltl2tgba_fm on
	the formula generated by "LTLcounterLinear.pl 8", approx 27% of
	the time was spent in the clone visitor.

	After this patch, cloning a formula is just an increment of the
	reference count of the top node.  Children are decremented only
	when the top node's ref count is decremented to zero.  With this
	change, clone() and destroy() become constant time, the
	ltl2tgba_fm spend only 0.01% of the time cloning formulae.


	* src/ltlast/automatop.cc (~automatop): Decrement children.
	(instance): Decrement children if the instance already exists.
	* src/ltlast/binop.cc, src/ltlast/multop.cc, src/ltlast/unop.cc:
	Likewise.
	* src/ltlvisit/clone.cc (clone): Simplify, now we only need to
	call ref().
	* src/ltlvisit/destroy.cc (destroy): Simplify, now we only need
	to call unref().
	(destroy_visitor): Remove, no longer needed.

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2009-11-07  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Make it easier to debug reference counts in LTL nodes.

	* src/ltlast/automatop.cc, src/ltlast/automatop.hh,
	src/ltlast/binop.cc, src/ltlast/binop.hh, src/ltlast/multop.cc,
	src/ltlast/multop.hh, src/ltlast/unop.cc, src/ltlast/unop.hh:
	Add a dump_instance() static method to all class.
	* src/ltltest/readltl.cc: Add option -r to dump all instances
	with their reference count, after parsing and after deletion.

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2009-11-07  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Better types for instance maps.

	* src/ltlast/unop.hh (map): Use unop* as values.
	* src/ltlast/binop.hh (map): Use binop* as values.
	* src/ltlast/multop.hh (map): Use multop* as values.
	* src/ltlast/automatop.hh (paircmp): Rename as tripletcmp.
	(map): Use automaton* as values, not formula*.

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2009-11-07  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Add missing instance_count() in automatop and eltl2tgba.

	* src/ltlast/automatop.hh, src/ltlast/automatop.cc: Add missing
	instance_count() functions.
	* src/tgbatests/eltl2tgba.cc: Add missing instance_count()
	assertions at the end.
	* src/tgbatests/ltl2tgba.cc: Also call automatop::instance_count(),
	even if automatop are not used in ltl2tgba yet.  This way we won't
	forget once eltl2tgba and ltl2tgba are merged.

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2009-11-07  Damien Lefortier <dam@lrde.epita.fr>

	* src/tgba/taa.cc, src/tgbatest/taa.cc: Adjust.

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2009-11-07  Damien Lefortier <dam@lrde.epita.fr>

	* src/tgba/taa.cc, src/tgba/taa.hh: Speed up the cartesian product
	in taa_succ_iterator and allow multiple initial states in taa.
	* src/tgba/ltl2taa.cc: Remove temporary printing.

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2009-11-05  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Fix ltlcounter.test for VPATH builds and n > 2.

	* src/tgbatest/defs.in (srcdir): Adjust from VPATH builds.
	* src/tgbatest/ltlcounter.test (lcdir): Adjust definition to
	new value of $srcdir.
	(run): Fix setting of $run after $n = 2.  Using run=: would in
	fact disable all the big tests...

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2009-11-05  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	* src/tgbatest/ltlcounter.test (run): Only construct small
	formulae (i.e. n<=2) under valgrind.  The test case is too
	slow otherwise.

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2009-11-04  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Fix spurious failure of style.test.

	* src/sanity/style.test: Make sure sh does not abort when read
	exits with false.

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	Fix a longstanding bug reported by Kristin Y. Rozier.
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	* src/ltlast/formula.hh (formula_ptr_less_than::operator()):
	Fix a typo where `l' was typed as `1'.
	* src/tgbatest/ltlcounter/: New files from Kristin Y. Rozier.
	* src/tgbatest/ltlcounter.test: New
	* src/tgbatest/Makefile.am (TESTS): Add ltlcounter.test.
	(EXTRA_DIST): Add files in ltlcounter/.

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2009-11-03  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Fix the help text of ltl2tgba.

	* src/tgbatest/ltl2tgba.cc (syntax): Add missing std::endl
	before -taa.  Remove -r8 and -fr8, since they do not exist.

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2009-10-28  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	* src/tgba/tgbacomplement.cc (state_complement): Remove the copy
	constructor.  It does the same thing as the default copy
	constructor, and g++ 4.2.3 complained that the copy constructor
	of spot::state was not called.  Reported by Denis Poitrenaud.

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2009-10-28  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	* src/ltlast/formula_tree.cc (instanciate, arity): Add a useless
	return 0 at the end to prevent g++ 4.2.3 from complaining about
	a missing return.  Reported by Denis Poitrenaud.

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2009-10-23  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	* src/tgbatest/kv.test: Don't run valgrind on dot!

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2009-10-16  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Escape labels in -KV output.

	* src/tgbaalgos/scc.cc (dump_scc_dot): Escape labels and other
	strings output between quote in dot.
	* src/tgbatest/kv.test: New file.
	* src/tgbatest/Makefile.am (TESTS): Add it.

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2009-10-16  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	* src/tgbaalgos/ltl2tgba_fm.cc: Typos.

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2009-10-22  Damien Lefortier <dam@lrde.epita.fr>

	Improve ltl_to_taa.

	* src/tgba/taa.cc, src/tgba/taa.hh: taa_succ_iterator is not
	on-the-fly anymore allowing some redundant transitions to be
	removed. Also a new function to output a TAA.
	* src/tgbaalgos/ltl2taa.cc, src/tgbaalgos/ltl2taa.hh: Add the
	refined rules from Tauriainen.
	* src/tgbatest/ltl2tgba.cc: Use -c to activate refined rules in
	ltl_to_taa.
	* src/tgbatest/spotlbtt.test: More tests.

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2009-10-17  Damien Lefortier <dam@lrde.epita.fr>

	Fix make check in sanity.

	* src/tgba/taa.cc, src/tgbaalgos/ltl2taa.cc: Fix style.

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2009-10-16  Damien Lefortier <dam@lrde.epita.fr>

	Minor fixes.

	* src/misc/bddop.hh, src/tgba/taa.hh, src/tgbaalgos/ltl2taa.hh:
	Fix sanity (incorrect include guard).
	* src/tgba/tgbacomplement.cc, src/tgba/tgbacomplement.hh:
	Copyright 2009.
	* src/tgbaalgos/eltl2tgba_lacim.cc: Use abbreviations.
	* src/tgbatest/taa.cc: Fix it.

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2009-10-16  Damien Lefortier <dam@lrde.epita.fr>

	Add a new algorithm (from Tauriainen) to translate LTL formulae to
	TGBA which uses TAA as an intermediate representation.  This is a
	basic version, optimizations and enhancements will come later.

	* src/tgbaalgos/ltl2taa.cc, src/tgbaalgos/ltl2taa.hh: The algortihm.
	* src/tgbaalgos/Makefile.am: Adjust.
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	* src/tgbatest/ltl2tgba.cc: New option: -taa, which uses this new
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	translation algorithm.
	* src/tgbatest/spotlbtt.test: Add ltl2tgba -taa.

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2009-10-04  Damien Lefortier <dam@lrde.epita.fr>

	Add a class to represent Transition-based Alternating Automata (TAA).

	* misc/Makefile.am, misc/bbop.cc, misc/bddop.hh: Factorize some
	code on BDDs to compute all_acceptance_conditions from
	neg_acceptance_condition.
	* src/tgba/Makefile.am, src/tgbatest/Makefile.am: Adjust.
	* src/tgba/taa.cc, src/tgba/taa.hh: The TAA class.
	* src/tgba/tgbaexplicit.hh: Use the factorized code in bddop.hh.
	* src/tgbatest/taa.cc, src/tgbatest/taa.test: Some test cases.

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2009-10-07  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

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	* AUTHORS: Add Damien Lefortier, Guillaume Sadegh, and Félix
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	Abecassis.

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2009-10-01  Guillaume Sadegh  <sadegh@lrde.epita.fr>

	The sgba proxy adds an acceptance condition to every states when
	the original automaton has no acceptance condition.

	* src/tgba/tgbasgba.cc, src/tgba/tgbasgba.hh: New option:
	when the original automaton has no accepting condition, it
	explicitly considers that every state is accepting.

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2009-09-30  Guillaume Sadegh  <sadegh@lrde.epita.fr>

	* src/tgba/tgbacomplement.cc: Move functions related to
	shared_ptr on states...
	* src/tgba/state.hh: ... here.
	* src/tgbatest/complementation.test: Do not apply some tests on
	the new algorithm because it takes to much time to run.

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2009-09-29  Guillaume Sadegh  <sadegh@lrde.epita.fr>

	A new complementation construction based on ranking.

	* src/tgba/tgbacomplement.cc, src/tgba/tgbacomplement.hh: The
	construction.
	* src/tgbatest/Makefile.am: Adjust.
	* src/tgbatest/complementation.cc: Add options to support this
	construction in addition to Safra construction.
	* src/tgba/Makefile.am: Adjust.
	* src/tgbatest/complementation.test: Adjust to test also this
	complementation.

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2009-09-29  Guillaume Sadegh  <sadegh@lrde.epita.fr>

	* src/ltltest/randltl.cc, src/ltltest/reduc.test,
	src/tgbatest/dfs.test: Adjust headers to 80 columns.