This fixes#412.
* spot/twaalgos/translate.cc: Add the quick syntactic simplification.
* spot/twaalgos/relabel.cc: Do not register old unused APs.
* tests/core/ltl2tgba2.test: Add test case.
* tests/core/bdd.test, tests/python/automata.ipynb: Adjust.
* NEWS: Mention this.
Under that option, !(a ^ b) was converted
to (!a <=> !b) instead of simply (a <=> b).
* spot/tl/simplify.cc (equiv_or_xor): Improve
rewriting.
* tests/core/ltl2tgba2.test, tests/python/simstate.py: Adjust test
cases.
Reported by Florian Renkin.
* spot/twaalgos/emptiness.cc (reduce): If the automaton uses Fin
acceptance, check the reduced cycle and revert to the original cycle
if necessary.
* tests/python/intrun.py: New file.
* tests/Makefile.am: Add it.
* spot/twaalgos/emptiness.hh: Improve documentation.
* spot/twaalgos/remfin.cc (default_strategy): Detect transitions
from the main copy that are completely accepting and that do not
need to be repeated in the clones.
* tests/python/remfin.py: Add a test case.
* tests/core/ltl2dstar4.test: Improve expected results.
* NEWS: Mention the change.
This remove some restrictions that prevented fuse_marks_here from
simplifying certain patterns, as noted in the first comment of
issue #405.
* spot/twaalgos/cleanacc.cc (find_interm_rec, find_fusable): Remove
some unnecessary restrictions to singleton marks, and replace the hack
put one non-singleton mark at the beginning of the singleton list by a
sort.
* tests/python/simplacc.py: Add two test cases.
* tests/python/automata.ipynb, tests/core/remfin.test: Improve
expected results.
* NEWS: Mention the bug.
* spot/tl/formula.hh: Add variant of formula::is that support 4
arguments.
* spot/tl/simplify.hh, spot/tl/simplify.cc: Add option keep_top_xor
to preserve Xor and Equiv at the top-level.
* spot/twaalgos/translate.cc: Adjust ltl-split to deal with Xor and
Equiv for the -D -G case.
* NEWS: Mention that.
* tests/core/ltl2tgba2.test: Add test case.
* tests/python/simstate.py: Adjust expected result.
* spot/twaalgos/dot.cc: Add support for option 'E', and default to
rectangle nodes for large labels.
* bin/common_aoutput.cc, NEWS: Document it.
* tests/core/alternating.test, tests/core/dstar.test,
tests/core/readsave.test, tests/core/sccdot.test,
tests/core/tgbagraph.test, tests/python/_product_weak.ipynb,
tests/python/alternation.ipynb, tests/python/atva16-fig2b.ipynb,
tests/python/automata.ipynb, tests/python/decompose.ipynb,
tests/python/gen.ipynb, tests/python/highlighting.ipynb,
tests/python/ltsmin-dve.ipynb, tests/python/ltsmin-pml.ipynb,
tests/python/parity.ipynb, tests/python/pdegen.py,
tests/python/satmin.ipynb, tests/python/stutter-inv.ipynb: Adjust all
test cases.
* spot/twaalgos/cleanacc.cc (remove_compl_rec): Rewrite to preserve
the original order of the acceptance condition while rewriting it.
* tests/core/sccdot.test, tests/python/merge.py,
tests/python/simplacc.py, tests/python/toparity.py: Adjust test cases.
Calling reduce_parity() in to_parity() is confusing, because then
running to_parity() on one SCC does not necessarily produce the same
output as running to_parity() on the entire automaton. However it is
necessary for the implementation of parity_prefix. As a compromise,
disable reduce_parity() when parity_prefix is disabled, this way we
can use that to demonstrate how the algorithm works.
* spot/twaalgos/toparity.hh, spot/twaalgos/toparity.cc: Do not
call reduce_parity() when parity_prefix is disabled.
* tests/python/toparity.py: Adjust.
* spot/twaalgos/cleanacc.cc (simplify_acceptance_here): Run the
simplifications in a loop until the condition does not change anymore.
* tests/python/simplacc.py, tests/core/accsimpl.test,
tests/core/remfin.test, tests/python/merge.py,
tests/python/simplacc.py, tests/python/toparity.py: Update expected
results.
* tests/python/automata.ipynb: Update the failing example to a more
interesting one, matching the one in doc/org/autfilt.org.
* spot/twaalgos/cleanacc.cc (fuse_mark_here): Fix incorrect cancelling
of n-ary subterms, causing an invalid acceptance condition, and then
an infinite loop.
* tests/python/simplacc.py: Add test case.
* spot/twaalgos/toparity.cc: Use a better search of the
transitions when we search compatible states.
* spot/twaalgos/toparity.hh: Use less that 80 columns.
* tests/python/merge.py, tests/python/toparity.py: Update tests.
* spot/twaalgos/cleanacc.cc: Use cleanup_acceptance if
propagate_fin_inf was useful.
* spot/twa/acc.hh: Avoid to reverse the order of the condition in
propagate_fin_inf.
* tests/core/accsimpl.test, tests/core/remfin.test,
tests/python/merge.py, tests/python/automata.ipynb: Update tests.
* tests/python/toparity.py: Update tests and add tests to check the
number of states.
* spot/twaalgos/toparity.hh, spot/twaalgos/toparity.cc: Use the
original names, to minimize differences with spot 2.8. Deprecate
them.
* tests/python/except.py: Adjust.
* NEWS: Mention the change.
* python/spot/__init__.py (to_parity): Iterate over the attributes
of spot.to_parity_options instead of naming each option explicitely,
also accept a to_parity_options() instance as argument.
* tests/python/toparity.py: Add tests for both styles of calls, and
reduce the number of random tests to lower the run time of this test.
* spot/twaalgos/toparity.hh: Improve doc, and rename car_option into
to_parity_options.
* doc/spot.bib: Add one reference.
* python/spot/__init__.py, spot/twaalgos/toparity.cc,
tests/python/toparity.py: Adjust.
* python/spot/__init__.py: Use keyword arguments in to_parity()
* python/spot/impl.i: remove useless includes.
* spot/twaalgos/car.cc, spot/twaalgos/car.hh,
spot/twaalgos/rabin2parity.cc, spot/twaalgos/rabin2parity.hh,
tests/Makefile.am, spot/twaalgos/Makefile.am:
content moved to toparity.
* spot/twaalgos/postproc.cc: Use the new version of to_parity in
postprocessor::run.
* spot/twaalgos/toparity.cc, spot/twaalgos/toparity.hh: Add the
content of rabin2parity and car.
* tests/python/car.py, tests/python/toparity.py: Moved all tests
from car.py to toparity.py.
* tests/python/except.py: Change iar() to iar_old().
* spot/twa/acc.hh: Remove useless comment.
* spot/twaalgos/car.cc: Rewrite the implementation to try
multiple algorithms and choose the best, add the possibility
to force the order of the colors/pairs in LAR and use
propagate_marks_here.
* spot/twaalgos/car.hh, tests/python/car.py: Create a new system of
options for CAR.
* spot/twaalgos/degen.cc, spot/twaalgos/degen.hh: Add the possibility
to forbid some marks in is_partially_degeneralizable.
Fixes#401, reported by Victor Khomenko.
* spot/twaalgos/stutter.cc (sl, sl2): If {} is accepting, upgrade the
acceptance condition.
* tests/core/stutter-tgba.test, tests/python/stutter.py: Add test cases.
* spot/twaalgos/genem.cc, spot/twaalgos/genem.hh: Improve the worst
case by not recurring twice into each disjunct individually. Keep
the previous two implementation available and add a function
generic_emptiness_check_select_version() so we can benchmark the
difference.
* tests/python/genem.py: Test the three versions.
Reported by Florian Renkin.
* spot/twaalgos/cleanacc.cc: Do not rewrite
...Fin(0)&(Fin(1)|(Fin(3)&Inf(4)))... as Fin(0)&f when it appears that
{1,3} cannot receive {0}, because {1} is used elsewhere in the
acceptance.
* tests/python/simplacc.py: Add test case.
* spot/twaalgos/degen.cc (keep_bottommost_copies): Fix intialisation
of bottommost_occurence.
* tests/python/pdegen.py: Add test case sent by Florian Renkin.
doing it too early breaks the "redirect all-accepting transitions"
optimization
* spot/twaalgos/degen.cc: move the original-states composition
code.
* tests/python/pdegen.py: Add test-case from Florian Renkin.
* bin/autfilt.cc: Add a --partial-degeneralize option.
* NEWS: Mention it.
* spot/twaalgos/degen.cc: Do not restrict partial_degeneralize() to
deterministic automata.
* spot/twaalgos/degen.hh: Adjust documentation.
* tests/core/pdegen.test: New test case.
* tests/Makefile.am: Add it.
* tests/python/pdegen.py: Adjust.
* spot/twaalgos/degen.cc: If an all-accepting transition has been
redirected, we need to force purge_unreachable_state() to be called,
otherwise we may have unreachable states.
* tests/python/pdegen.py: Add test case.
Reported by Florian Renkin
* spot/twaalgos/degen.cc (partial_degeneralize): Update
original-state when partial_degeneralize is executed more
than once in a loop.
* tests/python/pdegen.py: Add test case.
* spot/twaalgos/degen.cc,
spot/twaalgos/degen.hh (is_partially_degeneralizable): New function.
(partial_degeneralize): New version without todegen argument.
* tests/python/pdegen.py: Add test cases.
* spot/twaalgos/degen.cc, spot/twaalgos/degen.hh: Implement this.
Also throw a runtime error in case were todegen does not match any
subformula.
* tests/python/pdegen.py: Add tests.
On these 4 cases, added to pdegen.py, and supplied by Florian Renkin,
partial_degeneralize() is now at least as good as degeneralize_tba(),
and sometimes better. This is achieved as follows: (1) a
propagate_marks procedure is introduced to propagate marks as far as
possible on the automaton (e.g., common outgoing marks can be push
onto the incoming transitions and vice-versa), (2) the
degeneralization order is compute dynamically, and (3) whenever and
fully-accepting transition is taken in the original automaton, the
destination level is chosen to be the highest existing level.
* spot/twaalgos/degen.cc,
spot/twaalgos/degen.hh (propagate_marks_vector, propagate_marks_here):
New functions.
(partial_degeneralize): Improve, as described above.
* tests/python/pdegen.py: Add test cases.
* spot/twaalgos/degen.hh, spot/twaalgos/degen.cc: Implement it.
* tests/python/pdegen.py: New file.
* tests/Makefile.am: Add it.
* NEWS: Mention the new function.
* spot/twaalgos/remfin.cc (tra_to_tba): Remove the SCC-emptiness
check that was done by creating a temporary automaton. Use the
scc_info::check_scc_emptiness() function instead.
* spot/twaalgos/sccinfo.cc,
spot/twaalgos/sccinfo.hh (scc_info::check_scc_emptiness): Mark
this function as const.
(scc_and_mark_filter): Make sure we only combine with a lower filter
of the same type.
* spot/twaalgos/genem.cc: Remove one stray debugging statement.
* tests/python/genem.py: Remove a duplicate test.
This is to workaround differences in minidom's pretty-printing that
occurred between Python 3.7 and 3.8.
* python/spot/jupyter.py (SVG): New class.
* python/spot/__init__.py: Use it.
* tests/python/_altscc.ipynb, tests/python/alternation.ipynb,
tests/python/automata.ipynb, tests/python/formulas.ipynb,
tests/python/gen.ipynb, tests/python/highlighting.ipynb,
tests/python/ltsmin-dve.ipynb, tests/python/ltsmin-pml.ipynb,
tests/python/product.ipynb, tests/python/randaut.ipynb,
tests/python/testingaut.ipynb, tests/python/twagraph-internals.ipynb,
tests/python/word.ipynb: Adjust.
