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

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

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

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

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

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

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

	Better resource handling in minimization.

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

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

	Implement is_safety_automaton().

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

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

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

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

	Small fixes.

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

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

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	Test program for the minimization algorithm.

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

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

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

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

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

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

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

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

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

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

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

	Define SWIG_TYPE_TABLE as suggested by the SWIG documentation.

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

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

	Use swig2.0 if available.

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

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

	Get rid of ltihooks.py.

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

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

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

	* NEWS: Summarize recent changes.

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

	Merge transitions in tgba_tba_proxy.

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

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

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

	Augment the size of the ltlclasses benchmark.

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

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

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

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

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

	Use a cache to speed up tgba_tba_proxy.

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

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

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

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

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

	* README: Mention bench/ltlclases/.

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

	Preliminary benchmark using genltl, introduced earlier.

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

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

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

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

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

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

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

	Add full_parent support to to_spin_string().

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

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

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

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

	Move the eventual-universal functions where the belong.

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

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

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

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

	Remove a quadratic behavior in eventual_universal_visitor.

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

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

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

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

	Rationalize options for counter-example output.

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

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

	Fix a GCC 4.6 warning.

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

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

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

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

	Another Clang report.

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

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

	Fix more errors reported by Clang.

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

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

	Finalize Kripke interface.

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

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

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

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

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

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

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

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

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

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

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

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

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

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

	Fix some struct/class missmatches reported by clang.

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

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

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

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

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

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

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

	Cosmetics to please sanity checks.

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

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

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

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

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

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

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

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

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

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

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

	Cleanup neverclaim support.

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

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

	Add never claim parser.

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

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

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

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

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

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

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

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

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

	Hide the safra_tree_automaton type from the public interface.

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

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

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

	Fix the --enable-optimizations check.

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

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

	* NEWS: Typo.

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

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

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

	Release Spot 0.6.

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

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

	Reorder recent additions to reduccmp.test.

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

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

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

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

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

	More simplifications rules for M.

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

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

	Speed up syntactic_implication() for constants.

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

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

	Fix simplification of "a M true" as Fa.

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

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

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

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

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

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

	* NEWS: Mention W and M.

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

	More LTL reductions for W and M.

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

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

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

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	More LTL reductions for W and M.

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

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

	Add LTL reductions for strong release.

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

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

	Add LTL reductions for weak until.

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

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

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

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

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

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

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

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

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

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

	* NEWS: Summarize recent noteworthy changes.

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

	Modernize Bison parsers.

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

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

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

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

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

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

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

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

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

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

	Reverse the order of expected acceptance conditions in
	degeneralization.

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

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

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

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

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

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

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

	Fix memory leak introduced in yesterday's change.

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

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

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

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

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

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

	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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	Generalize the previous patch to accepting states in SBA.

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

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

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	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,
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