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

	Add some tests for the DVE2 interface.

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

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

	Clear the timer map to help valgrind.

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

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

	Some documentation of about the dve2 interface.

	* iface/dve2/README: New file.
	* NEWS: Mention it.
	* THANKS: Add Michael Weber.

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

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

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

	Call divine to compile dve models.

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

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

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

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

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

	Augment dve2check to perform LTL model checking.

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

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

	Teach the DVE2 interface about enumerated types.

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

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

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

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

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

	Display states variables in the state label.

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

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

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

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

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

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

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

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

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

	Setup build system for a new dve2 interface.

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

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

	Using double borders for acceptance states in SBAs.

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

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

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

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

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

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

	Speedup build_result() called by minimize_dfa().

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

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

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

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

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

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

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

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

	Correct tgba_explicit::compute_support_conditions.

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

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

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

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

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

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

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

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

	* HACKING (Running coverage tests): New section.

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

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

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

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

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

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

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

	Add some tricks into HACKING.

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

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

	Adjust the WDBA test to count for sub-transitions.

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

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

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

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

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

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

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

	* NEWS: Typos.

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

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

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

	Release Spot 0.7.1.

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

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

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

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

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

	Speedup scc_filter on tgba_explicit_number automata.

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

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

	Document the new operators in the on-line tools.

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

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

	Fix a segfault in WDBA minimization.

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

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

	Fix call to scc_filter in the CGI script.

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

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

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

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

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

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

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

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

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

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

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

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

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

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

	Recognize Goal's syntax for Boolean operators.

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

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

	Minor fixes to ltl2tgba.html.

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

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

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

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

	Release Spot 0.7.

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

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

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

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

	Fixup minimize_monitor().

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

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

	Report formulas that are both safety and guarantee.

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

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

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

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

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

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

	* NEWS: Minor rewritings.

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

	Replace delete by destroy in comments dealing with states.

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

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

	Update gspn interface for recent tools.

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

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

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

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

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

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

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

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

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

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

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

	Updates to the ltl2tgba ajax version.

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

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2011-01-19  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

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

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2011-01-18  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Preliminary implementation of an ajax-based ltl2tgba translator.

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

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

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

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

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

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

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	Fix segfault with g++-3.3.

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

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

	Fix a compilation failure with g++-3.3.

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

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2011-01-07  Alexandre Duret-Lutz  <adl@lrde.epita.fr>

	Fix usage of minimize_obligation in the CGI script.

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

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

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

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

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

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

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

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

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

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

	Speed up computation of non_final states for minimize_wdba.

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

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

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

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

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

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

	Cleanup the minimize.hh interface.

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

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

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

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

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

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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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	* 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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