GitLab

* src/ltlparse/public.hh: Rename as...
* src/tl/parse.hh: ... this.
* src/ltlparse/: Rename as...
* src/parsetl/: ... this.
* NEWS: Mention the change.
* README, configure.ac, doc/org/tut01.org, doc/org/tut02.org,
doc/org/tut03.org, doc/org/tut10.org, src/Makefile.am,
src/bin/common_finput.cc, src/bin/common_finput.hh, src/bin/ltl2tgta.cc,
src/kripkeparse/kripkeparse.yy, src/parseaut/parseaut.yy,
src/tests/checkpsl.cc, src/tests/checkta.cc,
src/tests/complementation.cc, src/tests/consterm.cc,
src/tests/emptchk.cc, src/tests/equalsf.cc, src/tests/ikwiad.cc,
src/tests/kind.cc, src/tests/length.cc, src/tests/ltlprod.cc,
src/tests/ltlrel.cc, src/tests/randtgba.cc, src/tests/readltl.cc,
src/tests/reduc.cc, src/tests/syntimpl.cc, src/tests/tostring.cc,
src/tl/Makefile.am, src/twaalgos/lbtt.cc, wrap/python/spot_impl.i,
iface/ltsmin/modelcheck.cc: Adjust.

* NEWS: Mention it.
* bench/stutter/stutter_invariance_formulas.cc,
bench/stutter/stutter_invariance_randomgraph.cc, doc/mainpage.dox,
doc/org/tut01.org, doc/org/tut02.org, doc/org/tut10.org, doc/tl/tl.tex,
iface/ltsmin/ltsmin.cc, iface/ltsmin/ltsmin.hh,
iface/ltsmin/modelcheck.cc, src/bin/autfilt.cc,
src/bin/common_aoutput.cc, src/bin/common_aoutput.hh,
src/bin/common_finput.cc, src/bin/common_finput.hh,
src/bin/common_output.cc, src/bin/common_output.hh, src/bin/common_r.hh,
src/bin/common_trans.cc, src/bin/common_trans.hh, src/bin/dstar2tgba.cc,
src/bin/genltl.cc, src/bin/ltl2tgba.cc, src/bin/ltl2tgta.cc,
src/bin/ltlcross.cc, src/bin/ltldo.cc, src/bin/ltlfilt.cc,
src/bin/ltlgrind.cc, src/bin/randaut.cc, src/bin/randltl.cc,
src/kripke/kripkeexplicit.cc, src/kripke/kripkeexplicit.hh,
src/kripkeparse/kripkeparse.yy, src/kripkeparse/public.hh,
src/ltlparse/fmterror.cc, src/ltlparse/ltlparse.yy,
src/ltlparse/ltlscan.ll, src/ltlparse/parsedecl.hh,
src/ltlparse/public.hh, src/parseaut/parseaut.yy,
src/parseaut/public.hh, src/tests/checkpsl.cc, src/tests/checkta.cc,
src/tests/complementation.cc, src/tests/consterm.cc,
src/tests/emptchk.cc, src/tests/equalsf.cc, src/tests/ikwiad.cc,
src/tests/kind.cc, src/tests/length.cc, src/tests/ltlprod.cc,
src/tests/ltlrel.cc, src/tests/parse.test,
src/tests/parse_print_test.cc, src/tests/randtgba.cc,
src/tests/readltl.cc, src/tests/reduc.cc, src/tests/syntimpl.cc,
src/tests/taatgba.cc, src/tests/tostring.cc, src/tests/tostring.test,
src/tl/apcollect.cc, src/tl/apcollect.hh, src/tl/contain.cc,
src/tl/contain.hh, src/tl/declenv.cc, src/tl/declenv.hh,
src/tl/defaultenv.cc, src/tl/defaultenv.hh, src/tl/dot.cc,
src/tl/dot.hh, src/tl/environment.hh, src/tl/exclusive.cc,
src/tl/exclusive.hh, src/tl/formula.cc, src/tl/formula.hh,
src/tl/length.cc, src/tl/length.hh, src/tl/mark.cc, src/tl/mark.hh,
src/tl/mutation.cc, src/tl/mutation.hh, src/tl/nenoform.cc,
src/tl/nenoform.hh, src/tl/print.cc, src/tl/print.hh,
src/tl/randomltl.cc, src/tl/randomltl.hh, src/tl/relabel.cc,
src/tl/relabel.hh, src/tl/remove_x.cc, src/tl/remove_x.hh,
src/tl/simpfg.cc, src/tl/simpfg.hh, src/tl/simplify.cc,
src/tl/simplify.hh, src/tl/snf.cc, src/tl/snf.hh, src/tl/unabbrev.cc,
src/tl/unabbrev.hh, src/twa/bdddict.cc, src/twa/bdddict.hh,
src/twa/bddprint.cc, src/twa/formula2bdd.cc, src/twa/formula2bdd.hh,
src/twa/taatgba.cc, src/twa/taatgba.hh, src/twa/twa.hh,
src/twa/twagraph.cc, src/twa/twagraph.hh, src/twaalgos/compsusp.cc,
src/twaalgos/compsusp.hh, src/twaalgos/ltl2taa.cc,
src/twaalgos/ltl2taa.hh, src/twaalgos/ltl2tgba_fm.cc,
src/twaalgos/ltl2tgba_fm.hh, src/twaalgos/minimize.cc,
src/twaalgos/minimize.hh, src/twaalgos/neverclaim.cc,
src/twaalgos/postproc.cc, src/twaalgos/postproc.hh,
src/twaalgos/powerset.cc, src/twaalgos/powerset.hh,
src/twaalgos/randomgraph.cc, src/twaalgos/randomgraph.hh,
src/twaalgos/relabel.cc, src/twaalgos/relabel.hh,
src/twaalgos/remprop.cc, src/twaalgos/remprop.hh, src/twaalgos/stats.cc,
src/twaalgos/stats.hh, src/twaalgos/stutter.cc, src/twaalgos/stutter.hh,
src/twaalgos/translate.cc, src/twaalgos/translate.hh,
wrap/python/spot_impl.i: Remove the ltl namespace.

The ltl prefix does not make a lot of sens anymore (since we
support psl as well).  ltlast/ and ltlenv/ were almost empty.
And ltlvisit/ did not contain any visitor anymore.

* src/ltlvisit/, src/ltlast/, src/ltlenv/: Merge into...
* src/tl/: ...this.
* NEWS: Mention the change.
* README, bench/stutter/stutter_invariance_formulas.cc,
bench/stutter/stutter_invariance_randomgraph.cc, configure.ac,
doc/org/tut01.org, doc/org/tut02.org, doc/org/tut10.org, doc/tl/tl.tex,
iface/ltsmin/ltsmin.hh, iface/ltsmin/modelcheck.cc, src/Makefile.am,
src/bin/autfilt.cc, src/bin/common_output.cc, src/bin/common_output.hh,
src/bin/common_r.hh, src/bin/common_trans.cc, src/bin/genltl.cc,
src/bin/ltl2tgba.cc, src/bin/ltl2tgta.cc, src/bin/ltlcross.cc,
src/bin/ltldo.cc, src/bin/ltlfilt.cc, src/bin/ltlgrind.cc,
src/bin/randltl.cc, src/kripke/kripkeexplicit.hh,
src/kripkeparse/public.hh, src/parseaut/public.hh, src/priv/accmap.hh,
src/ta/taexplicit.hh, src/ta/tgtaexplicit.hh, src/tests/equalsf.cc,
src/tests/ikwiad.cc, src/tests/length.cc, src/tests/ltlrel.cc,
src/tests/randtgba.cc, src/tests/readltl.cc, src/tests/reduc.cc,
src/tests/syntimpl.cc, src/tests/taatgba.cc, src/tests/tostring.cc,
src/tests/twagraph.cc, src/twa/acc.hh, src/twa/bdddict.cc,
src/twa/bdddict.hh, src/twa/bddprint.cc, src/twa/taatgba.cc,
src/twa/taatgba.hh, src/twa/twa.hh, src/twa/twagraph.cc,
src/twa/twagraph.hh, src/twa/twasafracomplement.cc,
src/twaalgos/compsusp.cc, src/twaalgos/compsusp.hh,
src/twaalgos/dtgbasat.cc, src/twaalgos/hoa.cc,
src/twaalgos/isweakscc.cc, src/twaalgos/lbtt.cc,
src/twaalgos/ltl2taa.cc, src/twaalgos/ltl2taa.hh,
src/twaalgos/ltl2tgba_fm.cc, src/twaalgos/ltl2tgba_fm.hh,
src/twaalgos/minimize.hh, src/twaalgos/neverclaim.cc,
src/twaalgos/randomgraph.hh, src/twaalgos/relabel.hh,
src/twaalgos/remprop.hh, src/twaalgos/stats.cc, src/twaalgos/stutter.cc,
src/twaalgos/translate.hh, wrap/python/spot_impl.i,
src/ltlparse/ltlparse.yy, src/ltlparse/public.hh: Adjust.

Fixes #106.

* m4/gccwarn.m4: Use -Wzero-as-null-pointer-constant if supported.
* src/bin/autfilt.cc, src/bin/common_aoutput.cc,
src/bin/common_finput.cc, src/bin/common_finput.hh,
src/bin/common_output.cc, src/bin/common_output.hh,
src/bin/common_post.cc, src/bin/common_r.hh, src/bin/common_range.hh,
src/bin/common_setup.cc, src/bin/common_trans.cc, src/bin/dstar2tgba.cc,
src/bin/genltl.cc, src/bin/ltl2tgba.cc, src/bin/ltl2tgta.cc,
src/bin/ltlcross.cc, src/bin/ltldo.cc, src/bin/ltlfilt.cc,
src/bin/ltlgrind.cc, src/bin/randaut.cc, src/bin/randltl.cc,
src/bin/spot-x.cc, src/kripke/kripkeexplicit.cc, src/ltlast/formula.cc,
src/ltlvisit/randomltl.cc, src/ltlvisit/randomltl.hh,
src/ltlvisit/relabel.cc, src/ltlvisit/relabel.hh,
src/ltlvisit/simplify.cc, src/ltlvisit/snf.hh, src/misc/fixpool.hh,
src/misc/mspool.hh, src/misc/hash.hh, src/misc/optionmap.cc,
src/misc/satsolver.cc, src/misc/tmpfile.cc, src/misc/tmpfile.hh,
src/priv/bddalloc.cc, src/ta/ta.hh, src/ta/taexplicit.cc,
src/ta/taexplicit.hh, src/ta/taproduct.cc, src/ta/tgtaexplicit.hh,
src/ta/tgtaproduct.cc, src/taalgos/minimize.cc,
src/taalgos/reachiter.cc, src/taalgos/tgba2ta.cc,
src/tests/complementation.cc, src/tests/ikwiad.cc,
src/tests/randtgba.cc, src/tests/reduc.cc, src/twa/bdddict.cc,
src/twa/bddprint.cc, src/twa/taatgba.cc, src/twa/twa.cc,
src/twa/twagraph.hh, src/twa/twaproduct.cc,
src/twa/twasafracomplement.cc, src/twaalgos/bfssteps.cc,
src/twaalgos/compsusp.cc, src/twaalgos/dtgbasat.cc,
src/twaalgos/emptiness.cc, src/twaalgos/gtec/ce.cc,
src/twaalgos/gv04.cc, src/twaalgos/ltl2taa.cc,
src/twaalgos/ltl2tgba_fm.cc, src/twaalgos/ltl2tgba_fm.hh,
src/twaalgos/magic.cc, src/twaalgos/minimize.cc,
src/twaalgos/ndfs_result.hxx, src/twaalgos/postproc.cc,
src/twaalgos/postproc.hh, src/twaalgos/reachiter.cc,
src/twaalgos/reducerun.cc, src/twaalgos/safety.hh,
src/twaalgos/sccfilter.hh, src/twaalgos/se05.cc,
src/twaalgos/simulation.cc, src/twaalgos/tau03.cc,
src/twaalgos/tau03opt.cc, src/twaalgos/translate.cc,
src/twaalgos/translate.hh, utf8/utf8/core.h,
bench/stutter/stutter_invariance_formulas.cc, iface/ltsmin/ltsmin.cc,
iface/ltsmin/modelcheck.cc: Use nullptr to fix the warning.

* src/twaalgos/product.cc, src/twaalgos/product.hh: Implement
the variance.
* src/bin/autfilt.cc: Expose it.
* src/tests/prodor.test: New file.
* src/tests/Makefile.am: Add it.
* NEWS: Mention it.

Flatten the formula ltl::formula hiearchy into a single ltl::vnode that
has an enumerator to distinguish the types of node, and a common
interface to access children, update reference counts, etc.  The
ltl::formula class is now a thin wrapper around an ltl::vnode pointer to
keep track of reference counts automatically.  Visitor are not used
anymore; we now have map() and traversor() methods that are more
concise.

This basically fixes #43, but should be followed by some fine tuning
that should now be localized to the formula.hh and formula.cc files.

Some statistics about this patch.  I started working on it on Sep 9, had
a first compiling version two weeks later on Sep 22, and it then took 5
days to fixes the ~70 distincts bugs that were introduced during the
conversion.  About 13200 lines were modified, and one third of those
were removed.

* src/ltlast/formula.cc, src/ltlast/formula.hh: Complete rewrite,
including what was in separate nearby files.
* src/ltla...

* NEWS: Mention the changes.
* doc/org/autfilt.org, doc/org/dstar2tgba.org,
doc/org/ltlcross.org, doc/org/tools.org, doc/org/tut20.org,
src/bin/man/dstar2tgba.x, src/bin/man/ltlcross.x: Adjust
documentation.
* src/bin/common_trans.cc: Use %O instead of %D, but keep %D
hidden for backward compatibility.

* src/parseaut/parseaut.yy, src/parseaut/scanaut.ll: All multiple
dstar automata to be chained.
* src/bin/dstar2tgba.cc: Loop over multiple automata in a file.
* src/tests/dstar.test: Test that.

Note that the parser is still not able to reader multiple dstar
automata.

* src/dstarparse/: Delete.
* configure.ac, src/Makefile.am, README: Adjust.
* src/parseaut/parseaut.yy, src/parseaut/scanaut.ll: Merge in the
dstarparser rules.
* src/bin/common_trans.cc, src/bin/common_trans.hh,
src/bin/dstar2tgba.cc, src/bin/ltlcross.cc, src/bin/ltldo.cc,
src/tests/ikwiad.cc: Adjust usage.
* src/tests/parseaut.test: Adjust expected output.

Fixes #96, reported by Vitus Lam & Christopher Ziegler.

* src/bin/ltlcross.cc: Catch std::bad_alloc, skip those
products and the related tests.  Display a count of
those skipped tests at the end.
* NEWS: Mention it.
* src/tests/ltlcross3.test: Adjust expected error
message.

This implies learning alternative rules for G, and W as well, since
those would use R.

Fixes #103.  Suggested by Joachim Klein.

* src/ltlvisit/unabbrev.cc, src/ltlvisit/unabbrev.hh: Implement the
new rules.
* doc/tl/tl.tex: Document the rules.
* src/tests/unabbrevwm.test: Test them.
* src/bin/ltlfilt.cc, NEWS: Mention that --unabbreviate accepts R.

Fixes #8.

* src/bin/dstar2tgba.cc: Here.

* src/dstarparse/dstarparse.yy, src/dstarparse/dstarscan.ll
src/dstarparse/parsedecl.hh, src/dstarparse/public.hh:
Adjust to return the same return types as parse_aut.
* src/dstarparse/fmterror.cc: Delete, we can use
the one of parse_aut.
* src/dstarparse/Makefile.am: Adjust.
* src/tests/ikwiad.cc, src/bin/dstar2tgba.cc,
src/bin/ltldo.cc: Adjust usage.
* src/bin/ltlcross.cc: The the result of dstar_parse() as-is, now that
it is a TωA like those produced by parse_aut().  As a consequence,
get rid of all the code storing statistics about the input
automaton.
* src/tests/ltlcross3.test, src/tests/ltl2dstar.test: Adjust expected
CSV output.
* doc/org/ltlcross.org, src/bin/man/ltlcross.x: Adjust to not
mention that %D performs a tranformation to Büchi.

* src/dstarparse/dstarparse.yy: Use the twa_graph_ptr to store the
acceptance condition.
* src/dstarparse/dra2ba.cc, src/dstarparse/dstar2tgba.cc,
src/dstarparse/nra2nba.cc, src/dstarparse/nsa2tgba.cc: Delete
all these conversion routines.
* src/dstarparse/public.hh, src/dstarparse/Makefile.am: Adjust.
* src/bin/dstar2tgba.cc: Adjust to call to_generalized_buchi()
instead.
* src/bin/ltlcross.cc: Adjust to call remove_fin() instead.
* src/bin/ltldo.cc: Use the parsed automaton as-is.
* src/tests/degenid.test, src/tests/dstar.test, src/tests/ikwiad.cc:
Adjust test cases.

* src/bin/ltlfilt.cc: Add option --unabbreviate.
* src/tests/ltlfilt.test: Add a test case.
* NEWS: Mention it.

* src/ltlvisit/lunabbrev.cc, src/ltlvisit/lunabbrev.hh,
src/ltlvisit/tunabbrev.cc, src/ltlvisit/tunabbrev.hh,
src/ltlvisit/wmunabbrev.cc, src/ltlvisit/wmunabbrev.hh: Delete.
* src/ltlvisit/unabbrev.cc, src/ltlvisit/unabbrev.hh: New files.
* src/ltlvisit/Makefile.am: Adjust.
* src/ltlvisit/print.cc, src/tests/equalsf.cc, src/tests/Makefile.am,
src/twaalgos/ltl2taa.cc, wrap/python/spot_impl.i, src/bin/ltlfilt.cc:
Adjust callers.
* src/ltlvisit/contain.cc, src/tests/syntimpl.cc: Remove useless
include.
* wrap/python/tests/formulas.ipynb: New test cases.
* doc/tl/tl.tex: Group all rules in a single section.
* NEWS: Mention it.

* src/bin/man/autfilt.x, src/bin/man/dstar2tgba.x,
src/bin/man/ltl2tgba.x, src/bin/man/ltlcross.x,
src/bin/man/ltlgrind.x, src/bin/man/randltl.x, src/bin/man/spot-x.x:
Improve typesetting and cross-references.
* tools/help2man: Adjust to better detect the optional arguments.
Detect options that are not separated from their description by two
spaces.  Argp output some of those.
* tools/man2html.pl: New file.
* Makefile.am: Distribute it.
* src/bin/ltlfilt.cc: Fix description of --define.
* src/bin/ltlgrind.cc: Fix duplicate description for --help and
--version.  Reorder --help output slightly.
* NEWS: Mention the few fixes.

* src/bin/common_trans.cc: Use double-quotes when single-quotes
cannot do.
* src/tests/ltlcross3.test: Add a test case.
* NEWS: Mention it.

I had no idea this was working...
Reported by Joachim Klein.

* src/bin/common_trans.cc: Document it.
* src/tests/ltlcross3.test: Test it.

* src/bin/autfilt.cc, src/bin/dstar2tgba.cc, src/bin/ltl2tgba.cc: Here.

* src/twaalgos/totgba.hh, src/twaalgos/totgba.cc: Implement
the new function.
* NEWS: Mention this new function.
* src/bin/man/spot-x.x: Document SPOT_STREETT_CONV_MIN.
* src/tests/ltl2dstar4.test: Add tests.
* src/tests/Makefile.am: Add it.
* src/bin/autfilt.cc: Do do call remove_fin explicitely
when --tgba is used, let the postprocessor do it.
* src/twa/acc.hh: Add shift operators for acceptance marks.
* src/twaalgos/remfin.cc: Use the new algorithm.
* src/twaalgos/sccinfo.cc, src/twaalgos/sccinfo.hh: Add
a new method to supply the acceptance sets visited by an SCC.

This helps diagnosing #96.

* src/bin/ltlcross.cc (process_formula): Print product sizes if
--verbose.

Reported by Jan Strejček.

* src/bin/spot-x.cc: Fix documentation.
* src/twaalgos/degen.cc, src/twaalgos/degen.hh: Fix comments.

Reported by Fanda when he was testing ltl3dra 0.2.2.

* src/bin/ltlcross.cc: Here.
* src/tests/ltl3dra.test: New file.
* src/tests/Makefile.am: Add it.

Reported by Fanda.

* src/bin/common_trans.cc: Here.

And in fact, rename most "trans*" as "edges*", because that what they
really are.

* src/bin/autfilt.cc, src/bin/ltlcross.cc, src/bin/randaut.cc,
src/dstarparse/dra2ba.cc, src/dstarparse/dstarparse.yy,
src/dstarparse/nra2nba.cc, src/dstarparse/nsa2tgba.cc,
src/graph/graph.hh, src/graph/ngraph.hh, src/ltlvisit/exclusive.cc,
src/parseaut/parseaut.yy, src/tests/complementation.cc,
src/tests/graph.cc, src/tests/ltl2tgba.cc, src/tests/ngraph.cc,
src/tests/twagraph.cc, src/twa/twagraph.cc, src/twa/twagraph.hh,
src/twa/twamask.hh, src/twaalgos/are_isomorphic.cc,
src/twaalgos/are_isomorphic.hh, src/twaalgos/canonicalize.cc,
src/twaalgos/cleanacc.cc, src/twaalgos/complete.cc,
src/twaalgos/compsusp.cc, src/twaalgos/cycles.cc,
src/twaalgos/degen.cc, src/twaalgos/dot.cc, src/twaalgos/dtbasat.cc,
src/twaalgos/dtgbacomp.cc, src/twaalgos/dtgbasat.cc,
src/twaalgos/dupexp.cc, src/twaalgos/emptiness.cc,
src/twaalgos/isunamb.cc, src/twaalgos/isweakscc.cc,
src/twaalgos/ltl2tgba_fm.cc, src/twaalgos/mask.hh,
src/twaalgos/minimize.cc, src/twaalgos/postproc.cc,
src/twaalgos/powerset.cc, src/twaalgos/product.cc,
src/twaalgos/randomgraph.cc, src/twaalgos/randomize.cc,
src/twaalgos/randomize.hh, src/twaalgos/relabel.cc,
src/twaalgos/remfin.cc, src/twaalgos/safety.cc, src/twaalgos/sbacc.cc,
src/twaalgos/sccfilter.cc, src/twaalgos/sepsets.cc,
src/twaalgos/simulation.cc, src/twaalgos/stutter.cc,
src/twaalgos/totgba.cc: Rename these.

Because this parser is not specific to HOA anymore.

* src/hoaparse/Makefile.am, src/hoaparse/fmterror.cc,
src/hoaparse/hoaparse.yy, src/hoaparse/parsedecl.hh,
src/parseaut/public.hh, src/hoaparse/hoascan.ll,
src/tests/hoaparse.test: Rename to...
* src/parseaut/Makefile.am, src/parseaut/fmterror.cc,
src/parseaut/parseaut.yy, src/parseaut/parsedecl.hh,
src/hoaparse/public.hh, src/parseaut/scanaut.ll,
src/tests/parseaut.test: ... these, and also adjust the name internally.
For instance hoa_aut_ptr is now parsed_aut_ptr; hoa_stream_parser is now
automaton_stream_parser, and hoa_parse() has become parse_aut().
* NEWS, README, configure.ac, doc/org/tut20.org, src/Makefile.am,
src/bin/autfilt.cc, src/bin/common_aoutput.cc,
src/bin/common_aoutput.hh, src/bin/common_conv.cc,
src/bin/ltlcross.cc, src/bin/ltldo.cc, src/tests/Makefile.am,
src/tests/complementation.cc, src/tests/ltl2tgba.cc,
src/tests/readsave.test, wrap/python/ajax/spot.in,
wrap/python/spot.py, wrap/python/spot_impl.i,
wrap/python/tests/automata-io.ipynb, wrap/python/tests/parsetgba.py:
Adjust.

* src/twaalgos/lbtt.hh (print_lbtt): Take a const char* opt argument.
* src/twaalgos/lbtt.cc: Use it, select state-based
vs. transition-based using automaton property, and implement output
for generalized state-based acceptance.
* src/bin/common_aoutput.cc, src/bin/common_aoutput.hh,
src/bin/dstar2tgba.cc: Adjust usage.  We do not need to handle
--lbtt=t as a special case anymore.
* src/tests/lbttparse.test, wrap/python/spot.py,
wrap/python/tests/automata-io.ipynb, wrap/python/tests/piperead.ipynb:
Adjust.

As actually claimed (but not done) by
738f939f.

* src/twaalgos/hoa.hh, src/twaalgos/hoa.cc: Rename it.
* src/bin/common_aoutput.cc, src/bin/dstar2tgba.cc,
src/bin/ltlcross.cc, src/tests/complementation.cc,
src/tests/ltl2tgba.cc, src/tests/randtgba.cc, src/twaalgos/hoa.cc,
wrap/python/spot.py: Adjust.

The following renamings are made:

  never_claim_reachable -> print_never_claim
  hoa_reachable   -> print_hoa
  lbtt_reachable  -> print_lbtt
  dotty_reachable -> print_dot
  ltl::dotty      -> print_dot_psl

Fixes #89.

* src/ltlvisit/dotty.cc, src/ltlvisit/dotty.hh, src/taalgos/dotty.cc,
src/taalgos/dotty.hh src/twaalgos/dotty.cc, src/twaalgos/dotty.hh:
Rename...
* src/ltlvisit/dot.cc, src/ltlvisit/dot.hh src/taalgos/dot.cc,
src/taalgos/dot.hh src/twaalgos/dot.cc, src/twaalgos/dot.hh:
... those.
* bench/stutter/stutter_invariance_randomgraph.cc,
iface/ltsmin/modelcheck.cc, src/bin/common_aoutput.cc,
src/bin/dstar2tgba.cc, src/bin/ltl2tgta.cc, src/dstarparse/dra2ba.cc,
src/ltlvisit/Makefile.am, src/taalgos/Makefile.am,
src/tests/checkpsl.cc, src/tests/checkta.cc,
src/tests/complementation.cc, src/tests/emptchk.cc,
src/tests/ltl2tgba.cc, src/tests/ltlprod.cc, src/tests/randtgba.cc,
src/tests/readltl.cc, src/tests/taatgba.cc, src/tests/twagraph.cc,
src/twa/twa.hh, src/twa/twasafracomplement.cc,
src/twaalgos/Makefile.am, src/twaalgos/dtbasat.cc,
src/twaalgos/dtgbasat.cc, src/twaalgos/dupexp.cc,
src/twaalgos/lbtt.cc, src/twaalgos/lbtt.hh,
src/twaalgos/ltl2tgba_fm.cc, src/twaalgos/neverclaim.cc,
src/twaalgos/neverclaim.hh, wrap/python/ajax/spot.in,
wrap/python/spot.py, wrap/python/spot_impl.i,
wrap/python/tests/ltl2tgba.py, wrap/python/tests/parsetgba.py: Adjust.

This actually performs three related changes, but separating them
would be quite inconvenient.

1) rename tostring.hh to print.hh a welcome side-effect is that
I could fix several files that included this file for not reason.

2) de-overload some of the to_string functions, and rename them
as follow:

  to_string -> print_psl, print_sere, str_psl, str_sere
  to_utf8_string -> print_utf8_psl, print_utf8_sere,
                    str_utf8_psl, str_utf8_sere
  to_spin_string -> print_spin_ltl, str_spin_ltl
  to_wring_string -> print_wring_ltl, str_wing_ltl
  to_lbt_string -> print_lbt_ltl, str_lbt_ltl
  to_latex_string -> print_latex_psl, str_latex_psl
  to_sclatex_string -> print_sclatex_psl, str_sclatex_psl

Now it is clearer what these functions do, and their restrictions.

3) all those print_* functions now take the stream to write onto
as their first argument.  This fixes #88.

* src/ltlvisit/tostring.cc, src/ltlvisit/tostring.hh: Rename into...
* src/ltlvisit/print.cc, src/ltlvisit/print.hh: ... those, and make
the changes listed above.
* doc/org/tut01.org, src/bin/common_output.cc,
src/bin/common_trans.cc, src/bin/ltl2tgba.cc, src/bin/ltl2tgta.cc,
src/bin/ltlcross.cc, src/bin/ltldo.cc, src/bin/ltlfilt.cc,
src/bin/randltl.cc, src/ltlparse/ltlparse.yy,
src/ltlvisit/Makefile.am, src/ltlvisit/mark.cc,
src/ltlvisit/relabel.cc, src/ltlvisit/simplify.cc,
src/ltlvisit/snf.cc, src/ta/taexplicit.cc, src/ta/tgtaexplicit.cc,
src/taalgos/tgba2ta.cc, src/tests/equalsf.cc, src/tests/ltl2tgba.cc,
src/tests/ltlrel.cc, src/tests/randtgba.cc, src/tests/reduc.cc,
src/tests/syntimpl.cc, src/tests/tostring.cc, src/twa/bdddict.cc,
src/twa/bddprint.cc, src/twa/taatgba.cc, src/twa/taatgba.hh,
src/twa/twagraph.cc, src/twaalgos/compsusp.cc, src/twaalgos/lbtt.cc,
src/twaalgos/ltl2taa.cc, src/twaalgos/ltl2tgba_fm.cc,
src/twaalgos/neverclaim.cc, src/twaalgos/remprop.cc,
src/twaalgos/stats.cc, wrap/python/ajax/spot.in, wrap/python/spot.py,
wrap/python/spot_impl.i: Adjust.

parse         -> parse_infix_psl
parse_lbt     -> parse_prefix_ltl
parse_sere    -> parse_infix_sere
parse_boolean -> parse_infix_boolean

Fixes #87.

* src/ltlparse/ltlparse.yy, src/ltlparse/public.hh:
Do the above changes.
* doc/mainpage.dox, doc/org/tut01.org, iface/ltsmin/modelcheck.cc,
src/bin/common_finput.cc, src/hoaparse/hoaparse.yy,
src/kripkeparse/kripkeparse.yy, src/tests/checkpsl.cc,
src/tests/checkta.cc, src/tests/complementation.cc,
src/tests/consterm.cc, src/tests/emptchk.cc, src/tests/equalsf.cc,
src/tests/kind.cc, src/tests/length.cc, src/tests/ltl2tgba.cc,
src/tests/ltlprod.cc, src/tests/ltlrel.cc, src/tests/randtgba.cc,
src/tests/readltl.cc, src/tests/reduc.cc, src/tests/syntimpl.cc,
src/tests/tostring.cc, wrap/python/ajax/spot.in,
wrap/python/tests/alarm.py, wrap/python/tests/interdep.py,
wrap/python/tests/ltl2tgba.py, wrap/python/tests/ltlparse.py: Adjust.

Fixes #86.

* src/ltlvisit/lbt.hh, src/ltlvisit/lbt.cc: Delete and move contents
into...
* src/ltlvisit/tostring.hh, src/ltlvisit/tostring.cc: ... these.
* doc/org/tut01.org, src/bin/common_output.cc,
src/bin/common_trans.cc, src/bin/ltlcross.cc,
src/ltlvisit/Makefile.am, src/twaalgos/lbtt.cc,
wrap/python/spot_impl.i: Adjust.

* src/bin/common_trans.cc: Skip leading directories, and
do not require that the prefix is followed by space of 0.
* src/tests/ltldo.test: Add a test.
* doc/org/ltlcross.org: Update.

* src/bin/common_trans.cc: Here.
* doc/org/ltlcross.org: Adjust examples.

Fixes #83.

* src/bin/randaut.cc: Add option.
* src/twaalgos/randomgraph.cc, src/twaalgos/randomgraph.hh: Honor it.
* src/tests/randaut.test: Add tests.
* doc/org/randaut.org: Document it.

This is particularly important for src/tests/satmin.test, where ltl2tgba
might be killed while writing a huge temporary file used for SAT-based
minimization.  Before this patch, the temporary files would remain in
src/tests/satmin.dir/, easily overflowing the 100GB limit of the docker
containers we use on the build farm.

* src/bin/common_setup.cc: Catch termination signals for all tools,
even those that do not yet clear temporary files.
* configure.ac: Check for sigaction.