* src/tgba/wdbacomp.cc
(tgba_wdba_comp_proxy::compute_support_conditions): Fix.
* src/tgbatest/wdba2.test: Test a formula that used to be wrongly
minimized if translated by LaCIM, because the product of a
tgbabddconcrete automaton with another automaton (done during
WDBA-minimization) use the support conditions to speed things up.
* src/tgbaalgos/minimize.cc (minimize_obligation): Delete the powerset
automaton when we return 0 because we know if the result is correct
and don't have the formulae to check it. Reported by Étienne Renault.
This is motivated by the fact that sog-its used the low-level data
structures used by the bdd_dict to do such work, and broke because of
the recent changes in this area.
* src/tgba/bdddict.cc, src/tgba/bdddict.hh (oneacc_to_formula):
New method.
* src/tgbaalgos/save.cc: Use it.
Doing so will release all BDD variables used by automata created for
syntactic implication. This way the main translation will create
acceptance variables again in a more natural order, which will help
the degeneralization (until we get a better degeneralization).
* src/ltlvisit/contain.cc, src/ltlvisit/contain.hh
(language_containment_checker::clear): New method to clear the
containment cache.
* src/ltlvisit/simplify.cc, src/ltlvisit/simplify.hh
(clear_as_bdd_cache): Also call language_containment_checker::clear.
This cause double-circles for accepting states in dot output.
* src/tgbatest/ltl2tgba.cc: Set assume_sba for automata read from
neverclaims. Reset assume_sba after scc_filter and simulation.
* src/tgbatest/neverclaimread.test: Expect a double circle.
Syntactic implication checks may use as_bdd() to compare Boolean
formulae. By doing so, they register Boolean variables in an order
that is usially detrimental to the LTL translator. The new,
clear_as_bdd_cache() function offers a mean to unregister these
variables, so that the LTL translator will register them again in the
a more natural way.
* src/ltlvisit/simplify.hh, src/ltlvisit/simplify.cc
(clear_as_bdd_cache): New function.
* src/tgbatest/ltl2tgba.cc, wrap/python/ajax/spot.in: Call it.
* src/ltlvisit/simplify.cc
(ltl_simplifier_cache::syntactic_implication): If the lhs and rhs are
literals that are not equal, return false immediately.
* src/tgba/bdddict.hh, src/tgba/bdddict.cc: Store variable types and
associated formula in a vector indexed by BDD variable numbers,
instead of using several maps.
* src/evtgbaalgos/tgba2evtgba.cc, src/tgba/bddprint.cc,
src/tgba/formula2bdd.cc, src/tgbaalgos/ltl2tgba_fm.cc,
src/tgbaalgos/save.cc: Adjust usage.
* src/tgbaalgos/ltl2tgba_fm.cc (implied_subforfmulae): New function.
(ltl_trad_visitor::visit(const binop*)): Use it. This is an attempt
to correct the unoptimal translation of 'Fa & GFa' left by previous
patch. It still fails to optimize 'Fa & GF(a&b)', but this is not a
regression compared to previous version.
* src/tgbaalgos/ltl2tgba_fm.cc: Add a "recurring" mode for the
translation of the child of G. This generalizes Couvreur's original
trick to translate GFa as (a|Prom(a))&X(GFa) without generating an
intermediate GF(a)&F(a) state that would have to be merged with GF(a)
latter. This implementation will also speedup formulas such a G((a U
b) & (c M d)). With this patch, translating GF(p1) & GF(p2) &
... GF(p20) into a TGBA takes 57s instead of 128s on my computer.
However it alsos causes some formulas to be translated into larger
automata that are not immediately reduced (the simulation-reduction is
needed). For instance Fa & GFa now has a different signature than
GFa, so translating 'Fa & GFa' generates two states where is used to
generate only one.
We need a marked version of !{r} to perform breakpoint unroling.
* src/ltlast/unop.cc, src/ltlast/unop.hh: Declare a NegClosureMarked
operator.
* src/ltlvisit/mark.hh, src/ltlvisit/mark.cc,
src/tgbaalgos/ltl2tgba_fm.cc: Adjust to deal with NegClosureMarked
and NegClosure as apropriate.
* src/ltlvisit/simplify.cc, src/ltlvisit/tostring.cc,
src/ltlvisit/tunabbrev.cc, src/tgbaalgos/eltl2tgba_lacim.cc,
src/tgbaalgos/ltl2taa.cc, src/tgbaalgos/ltl2tgba_lacim.cc,
src/tgba/formula2bdd.cc: Deal with NegClosureMarked in the same way as
we deal with NegClosure.
* src/tgbatest/ltl2tgba.test: More tests.
* src/ltltest/kind.test: Adjust.
* doc/tl/tl.tex: Mention the marked negated closure.
Because only the configure macros of spot::srand() had been updated to
the introduction of _config.h, rand() was used even if drand48() was
available, and yet srand48() was being called by spot::srand(). The
consequence is that setting the seed with srand48() had not effect on
the value returned by rand(). Reported by Etienne Renault.
* src/misc/random.cc (drand): Fix configure macros used.
* src/misc/acccompl.hh, src/misc/acccompl.cc (AccCompl): Rename to
acc_compl.
* src/tgbaalgos/simulation.cc (AccComplAutomaton, Simulation): Rename
to acc_compl_automaton and direct_simulation. At the same time,
reindent the whole file.
* src/sanity/style.test: Detect capitalized class names.
* src/kripke/kripkeexplicit.hh (KripkePrint): Remove useless
predeclaration.
* src/tgbaalgos/simulation.hh: Typo in comment.
* src/ltlvisit/wmunabbrev.hh, src/ltlvisit/wmunabbrev.cc: New files.
* src/ltlvisit/Makefile.am: Add them.
* src/ltlvisit/tostring.cc (to_spin_string): Use the new rewriting.
* wrap/python/ajax/spot.in: Warn when a "Spin" still contain PSL
operators.
* wrap/python/ajax/ltl2tgba.html: Adjust help text.
* doc/tl/tl.tex, NEWS: Document the new rewriting.
* src/ltlparse/ltlscan.ll: Understand the combining overline, and
combining overbar as synonym for =0.
* src/ltlvisit/tostring.cc: Emit a combining overline for
single-letter atomic propositions.
* src/ltlast/atomic_prop.hh (is_atomic_prop): New function.
* doc/tl/tl.tex: Document these two characters.
* src/tgba/tgbaexplicit.hh: Rerganize a bit to
allow different functions to be used to format
states. Add an enabled_utf8() method to
tgba_explicit_formula.
* src/tgbaalgos/dotty.hh, src/tgbaalgos/dotty.cc:
Simplify the interface by not depending on
dotty_decorator explicitely.
* src/tgba/bddprint.hh (enable_utf8): New function.
* src/tgba/bddprint.cc (enable_utf8): Implement it
and use the global utf8 flag in other functions.
* src/tgbatest/ltl2tgba.cc: Add an -8 option for
UTF-8 outpout.
* wrap/python/spot.i: Adjust for tgbexplicit.hh
changes.
* src/ltlparse/public.hh (fix_utf8_locations): New function.
* src/ltlparse/fmterror.cc (fix_utf8_locations): Implement it.
(format_parse_errors): Rename as ...
(format_parse_errors_aux): ... this.
(format_parse_errors): New implementation that call fix_utf8_locations()
before format_parse_errors_aux() on valid utf8 strings.
* src/ltlparse/Makefile.am: Include $(top_srcdir).
* src/ltltest/utf8.test: New file.
* src/ltltest/Makefile.am: Add it.
* src/ltltest/parse.test: Fix header.
* src/ltlparse/ltlparse.yy: Make all the above operators
right-associative. Also let `:' have precedence over `;'.
* src/ltltest/reduccmp.test: Adjust for the `:' precedence.
* doc/tl/tl.tex, NEWS: Document this.
* src/ltlvisit/simplify.cc (reduce_sere_ltl): New function,
to factor the code of the []-> and <>-> rewrittings.
* src/ltltest/reduccmp.test: Add more tests.
* doc/tl/tl.tex: Document these rewritings.
* src/ltlvisit/simplify.cc: Here.
* doc/tl/tl.tex: Document then.
* src/ltlast/bunop.hh (as_KleenStar): New helper function.
* src/ltltest/reduccmp.test: Add more tests.
* src/ltltest/reduc.cc: Also display the resulting formula
without reduce_size_stricly.
