Commit graph

188 commits

Author SHA1 Message Date
Alexandre Duret-Lutz
20a4959ff6 stats: fix slow %s and inappropriate %S output
Fixes #269.

* spot/twaalgos/stats.cc: Use twa_statistics instead of
twa_sub_statistics when %t is not used.
* bin/common_aoutput.cc: Likewise, also fix %S to use twa_statistics
instead of num_states(), and document that %s,%t,%e all return
statistics about the reachable part of the automaton.
* tests/core/format.test: Add more tests.
* NEWS: Document the issue.
2017-06-19 17:52:41 +02:00
Etienne Renault
440380c5ca ikwiad: fix accepting run printing
* tests/core/ikwiad.cc: here.
2017-06-11 23:12:03 +02:00
Alexandre Duret-Lutz
526e19d4b6 * tests/core/ltlcross4.test: Ignore space diff in pandas' output. 2017-06-03 11:03:58 +02:00
Alexandre Duret-Lutz
526b299de8 work around change in pandas 0.20
* tests/core/ltlcross4.test: Replace describe() by agg() to work
around a backward incompatible change in pandas 0.20.
2017-06-03 10:04:14 +02:00
Alexandre Duret-Lutz
ae0e84ac9e simulation: do not depend on bdd numbers for ordering classes
Fixes #262 again.  Reported by Maximilien Colange.

* spot/twaalgos/simulation.cc: Use state numbers to order classes, not
their signatures.  The problem was that even if two simulation of the
same automaton assign the same signature, the BDD identifier used for
that signature might be different, and therefore the ordering obtained
by using BDDs as keys in a map can be different.  A side-effect of
this change is that the order of states in automata produced by
simulation-based reduction may change; many tests had to be updated.
* tests/core/ltl2tgba.test: Add a new test case based on Maximilien's
report.
* tests/core/complement.test, tests/core/det.test,
tests/core/parseaut.test, tests/core/prodor.test,
tests/python/atva16-fig2a.ipynb, tests/python/automata.ipynb,
tests/python/decompose.ipynb, tests/python/highlighting.ipynb,
tests/python/piperead.ipynb, tests/python/testingaut.ipynb,
tests/python/word.ipynb: Update test cases for new order of states.
2017-06-03 10:03:59 +02:00
Alexandre Duret-Lutz
7b6cfd448c dot: fix printing of alternating automata
Related to #208.

* spot/twaalgos/dot.cc: Fix missing definitions of universal nodes,
and inclusion of universal nodes inside of SCC when none of the
destination comes back to the SCC.
* tests/python/_altscc.ipynb: Adjust and add more test cases.
* tests/core/alternating.test, tests/core/neverclaimread.test,
tests/core/readsave.test, tests/core/sccdot.test,
tests/python/decompose.ipynb: Adjust test cases.
* NEWS: Mention the bug.
2017-06-02 11:38:43 +02:00
Alexandre Duret-Lutz
f6607f1a2c bin: release all subformulas between runs
Fixes #262, reported by Maximilien Colange.

* bin/common_output.cc, bin/common_aoutput.cc, bin/common_aoutput.hh:
Clear the set of atomic propositions if --stats=%[...]x was used.
* spot/twa/bdddict.cc: Release any formula associated to a BDD when it
is unregistered, do not wait for the dictionary's destruction.  This
was the main culprit for #262.
* tests/core/ltl2tgba.test: Add test cases.
* NEWS: Mention the bug.
2017-05-18 18:25:55 +02:00
Alexandre Duret-Lutz
aa40482352 ltl2tgba: clear simplification cache between translations
The cache used in formula simplification will keep atomic propositions
defined between several translations, and may impact variable order.
Reported by Maximilien Colange.

* spot/tl/simplify.hh, spot/tl/simplify.cc,
spot/twaalgos/translate.cc, spot/twaalgos/translate.hh (clear_cache):
New method.
* bin/ltl2tgba.cc, bin/ltl2tgta.cc: Call it.
* spot/twaalgos/stats.cc: Do not keep a point to the formula after
printing statistics.
* tests/core/ltl2tgba.test: Add a test case.
* tests/core/readsave.test: Adjust one formula.
* NEWS: Mention the issue.
2017-05-10 17:03:05 +02:00
Alexandre Duret-Lutz
8968bf6c4e simplify: fix related to event_univ handling
Fixes #260.  Reported by František Blahoudek.

The simplification F(f)|q = F(f|q), where q designates an event_univ
formula, was not always applied because of a couple of issue: (1) the
mospliter was ignoring event_univ unless favor_event_univ was set, (2)
when processing formulas from res_EventUniv they were not put back
into res_F or res_G to be subject to the F/G rules.

* spot/tl/simplify.cc: Improve handling of the above points.
* tests/core/reduccmp.test: Adjust and add test case.
* tests/core/ltl2tgba2.test, tests/python/atva16-fig2a.ipynb: Adjust.
2017-05-08 13:32:55 +02:00
Alexandre Duret-Lutz
04640af135 bin: remove temporary files even on errors
Fixes #259.

* bin/common_setup.cc: Register a cleanup_tmpfiles() via atexit.
* tests/core/ltldo.test: Add a test case.
* NEWS: Mention the bug.
2017-05-04 15:37:39 +02:00
Alexandre Duret-Lutz
f02ca87f07 sbacc: fix a serious bug
Reported by Thibaud Michaud

* spot/twaalgos/sbacc.cc: Do not label rejecting SCCs with the empty
mark, as it might be accepting.
* tests/core/sbacc.test: Add test cases.
* NEWS: Mention the bug.
2017-04-19 20:55:42 +02:00
Alexandre Duret-Lutz
08c153d3bb genltl: add support for --p-patterns
Fixes #246.

* bin/genltl.cc: Implement it.
* bin/man/genltl.x, doc/org/genltl.org, NEWS: Document it.
* tests/core/ltl2tgba2.test: Test it.
2017-04-07 11:30:31 +02:00
Alexandre Duret-Lutz
4b7a6238b4 genltl: add --hkrss-patterns
Fixes #245.

* bin/genltl.cc: Add the option.
* bin/man/genltl.x: Add reference.
* tests/core/ltl2tgba2.test: Use these patterns.
* doc/org/genltl.org, NEWS: Document the options.
2017-04-07 11:29:49 +02:00
Alexandre Duret-Lutz
1daffe12f0 remfin: fix a corner case for rabin_to_buchi_maybe
when fin_alone sets where presents (i.e., not really Rabin condition),
the rabin_to_buchi_maybe() could fail to notice DBA-typeness.

* spot/twaalgos/remfin.cc: Don't set scc_ba_type to false when
fin_alone is present.
* tests/core/remfin.test: Add a test case.
2017-04-07 11:14:06 +02:00
Alexandre Duret-Lutz
6623af67e6 twa_graph: fix purge_unreachable_states on alternating automata
The algorithm had two problems: it was removing only useless
destination from universal destination (instead of removing the entire
edge), and it was not properly iterating over the entire reachable
automaton.

* spot/twa/twagraph.cc: Fix it.
* spot/twa/twagraph.hh: Adjust documentation.
* tests/core/alternating.test: Add more tests.
* tests/python/twagraph.py: Adjust.
* NEWS: Mention the bug.
2017-03-29 10:34:41 +02:00
Alexandre Duret-Lutz
73bb562bf5 complement: reset the terminal property
Reported by Thomas Medioni.

* spot/twaalgos/complement.cc: Here.
* tests/core/complement.test: Add a test case.
* NEWS: Mention it.
2017-03-28 07:28:52 +02:00
Alexandre Duret-Lutz
cdf699ff23 genltl: fix %F for --r-left and --r-right
Fixes #247.

* bin/genltl.cc: Here.
* tests/core/genltl.test: Make sure %F always return a correct pattern
name..
* NEWS: Mention the bug.
2017-03-22 22:48:16 +01:00
Alexandre Duret-Lutz
650bb7ed03 twa_graph: fix set_univ_init_state() with initializer_list
Reported by Thomas Medioni.

* spot/twa/twagraph.hh (set_univ_init_state): Remove the bogus
template parameter.
* tests/core/twagraph.cc, tests/core/tgbagraph.test: Test the method.
* NEWS: Mention the bug.
2017-03-07 15:39:17 +01:00
Alexandre Duret-Lutz
0621e0e9c5 monitor: fix -MD/-M difference in property output
Fixes #241.

* spot/twaalgos/postproc.cc: Use the deterministic monitor if it
has as many states as the non-deterministic one.
* spot/twaalgos/minimize.cc (minimize_monitor): Quickly check
for terminal automata.
* spot/twaalgos/stripacc.cc: Set the weak property.
* spot/twaalgos/stripacc.hh: Improve documentation.
* tests/core/monitor.test, tests/core/sbacc.test: Update.
* NEWS: Mention the issue.
2017-03-03 22:57:55 +01:00
Alexandre Duret-Lutz
9defdad2bc postproc: fix monitor code
Fixes #240.

* spot/twaalgos/postproc.cc: Do not call do_simul on the output of
minimize_monitor(), and do not skip complete() when PREF_==Any.
* tests/core/monitor.test: Add a test case.
* NEWS: Mention the bug.
* doc/org/ltl2tgba.org: Document complete monitors.
2017-03-03 22:57:08 +01:00
Alexandre Duret-Lutz
57ea6d9634 sbacc: fix a typo and remove some useless code
* spot/twaalgos/sbacc.cc: Do not assign to one_in twice, and
fix the value of init_acc.
* tests/core/sbacc.test: Add a test case.
* NEWS: Mention the bug.
2017-03-03 22:57:08 +01:00
Alexandre Duret-Lutz
dfe02f722e add options to %x to list atomic propositions
* bin/common_aoutput.cc, bin/common_aoutput.hh, bin/common_output.cc,
bin/common_output.hh: Add options to %x to list atomic propositions
with various quoting scheme.  Deprecate --format=%a in favor of the
new --format=%x for consistency with --stats=%x.
* tests/core/format.test, tests/core/remprop.test: Adjust and add more
tests.
* NEWS: Mention these changes.
2017-03-02 14:19:16 +01:00
Alexandre Duret-Lutz
e0d3291881 correct handling of --stats=%P
Fixes #236.

* bin/common_aoutput.cc: Fix it.
* tests/core/format.test: Improve test cases.
* NEWS: Mention the bug.
2017-02-28 16:58:31 +01:00
Alexandre Duret-Lutz
6c218e4828 bin: --stats=%x to count atomic propositions
* bin/common_aoutput.cc, bin/common_aoutput.hh: Implement %x and %X.
* tests/core/remprop.test: Test them.
* NEWS: Mention them.
2017-02-28 16:58:23 +01:00
Alexandre Duret-Lutz
1c96afb1d0 genltl: --kv-phi is in fact --kv-psi
* bin/genltl.cc: Change the name and add the bibtex entry.
* bin/man/genltl.x: Replace LNCS by LNAI.
* tests/core/genltl.test: Also test the %F output.
2017-02-18 10:49:36 +01:00
Vincent Tourneur
fc2831bf24 genltl: Add 3 families of LTL formulas from a paper
Fixes #80.

* bin/genltl.cc: Add --kr-n2, --kr-nlogn and --kr-n.
* bin/man/genltl.x: Add the paper in the documentation.
* tests/core/genltl.test: Test them.
2017-02-16 18:59:34 +01:00
Arthur Remaud
f7bbfd2812 autfilt: Better display of cluster when universal edge loops in it
Fixes #208

* NEWS: Informations about the modifications
* spot/twaalgos/dot.cc (print): Gestion of cluster for
universal transitions
* tests/core/alternating.test: tests added
* tests/core/neverclaimread.test: tests changed for
new dot format
* tests/core/readsave.test: tests changed
* tests/core/sccdot.test: tests changed
* tests/python/_altscc.ipynb: tests changed
* tests/python/decompose.ipynb: tests changed
2017-02-16 18:53:18 +01:00
Arthur Remaud
34859568cd autfilt: add option (y) to --dot to split universal transitions
Fixes #207

* NEWS: Informations about the option 'y' for --dot added
* bin/common_aoutput.cc: Documentation for the option 'y'
for --dot added
* spot/twaalgos/dot.cc (print_dst, process_link): Functions
modified for the new option
* tests/core/alternating.test: Tests added
2017-02-16 18:52:37 +01:00
Alexandre Duret-Lutz
fefb375d5f is_alternating() -> !is_existential()
Part of #212.

* spot/misc/common.hh (SPOT_DEPRECATED): Improve support current
compilers and options flags.
* spot/twa/twagraph.hh, spot/graph/graph.hh (is_alternating): Mark it
as deprecated.
(is_existential): New method.
* bin/autfilt.cc, bin/ltlcross.cc, spot/parseaut/parseaut.yy,
spot/twa/twa.cc, spot/twa/twagraph.cc, spot/twaalgos/alternation.cc,
spot/twaalgos/are_isomorphic.cc, spot/twaalgos/canonicalize.cc,
spot/twaalgos/couvreurnew.cc, spot/twaalgos/cycles.cc,
spot/twaalgos/degen.cc, spot/twaalgos/determinize.cc,
spot/twaalgos/dot.cc, spot/twaalgos/dtbasat.cc,
spot/twaalgos/dtwasat.cc, spot/twaalgos/hoa.cc,
spot/twaalgos/isunamb.cc, spot/twaalgos/isweakscc.cc,
spot/twaalgos/mask.hh, spot/twaalgos/minimize.cc,
spot/twaalgos/postproc.cc, spot/twaalgos/product.cc,
spot/twaalgos/randomize.cc, spot/twaalgos/remfin.cc,
spot/twaalgos/sbacc.cc, spot/twaalgos/sccfilter.cc,
spot/twaalgos/sccinfo.cc, spot/twaalgos/simulation.cc,
spot/twaalgos/strength.cc, tests/core/graph.cc, tests/core/ngraph.cc,
tests/python/alternating.py: Adjust all uses.
* NEWS: Mention the renaming.
2017-02-12 15:56:02 +01:00
Alexandre Duret-Lutz
15c6fd9562 alternation: fix detection of non-weak automata
Fixes #218.

* spot/twaalgos/alternation.cc: Adjust check.
* tests/core/alternating.test: Add test case from #218.
* NEWS: Mention the bug.
2017-02-12 01:37:52 +01:00
Maximilien Colange
3f5470898d Rework the 'down_cast' macro, closing #196.
* spot/misc/casts.hh: New inline functions and compile-time checks.
* spot/kripke/kripkegraph.hh, spot/ta/taexplicit.cc,
  spot/ta/taproduct.cc, spot/ta/tgtaproduct.cc, spot/taalgos/tgba2ta.cc,
  spot/twa/taatgba.hh, spot/twa/taatgba.cc, spot/twa/twagraph.hh,
  spot/twa/twaproduct.cc, spot/twaalgos/emptiness.cc,
  spot/twaalgos/stutter.cc, spot/ltsmin/ltsmin.cc, tests/core/ikwiad.cc,
  tests/core/ngraph.cc: Remove downcast checks from code.
2017-02-02 17:01:40 +01:00
Etienne Renault
63116ff79c Fixes #205.
* tests/core/hierarchy.test: here.
2017-02-01 19:41:54 +01:00
Alexandre Duret-Lutz
a4b575db1c ltldo: add portfolio options
Fixes #206.

* bin/ltldo.cc: Implement --smallest and --greatest.
* tests/core/ltldo2.test: Test them.
* NEWS, doc/org/ltldo.org: Document them.
2017-01-27 20:35:40 +01:00
Alexandre Duret-Lutz
0ad62cb97b langmap: adjust to only color non-unique languages
Fixes #203.

* spot/twaalgos/langmap.hh (highlight_languages): Simplify the
interface by only taking the automaton to color.
* spot/twaalgos/langmap.cc (highlight_languages): Only introduce
color for states that have a non-unique language.
* tests/core/highlightstate.test: Update and add more tests.
* tests/python/langmap.py: Keep the tests simple.
* bin/autfilt.cc: Adjust usage and help string.
2017-01-17 21:58:03 +01:00
Alexandre Duret-Lutz
c7141bd189 ltlcross: disable products columns in CSV if --products=0
* bin/ltlcross.cc: Fix it.
* tests/core/ltlcross3.test: Test it.
* NEWS: Mention the bug.
2017-01-14 10:43:35 +01:00
Alexandre Duret-Lutz
b210db8949 sat_minimize: do not complete in the preproc step
Fixes #204.

* spot/twaalgos/dtwasat.cc (sat_minimize): Here.
* tests/core/satmin2.test: Add a test case.
* NEWS: Mention the bug.
2017-01-14 10:18:16 +01:00
Alexandre Duret-Lutz
3ff2acb397 alternation: better detection of non-weak alternating automata
* spot/twaalgos/alternation.cc: Fix the code to also check the
weakness of single-state SCCs.
* tests/core/alternating.test: Add a test from ltl3hoa.
2017-01-14 10:02:37 +01:00
Alexandre Duret-Lutz
43520a3e87 ltlcross, ltldo: add a --relabel option
* bin/common_trans.cc, bin/common_trans.hh: Add the --relabel option.
* bin/ltlcross.cc, bin/ltldo.cc: Implement it.
* doc/org/ltldo.org, NEWS: Document it.
* tests/core/ltl3ba.test: Test it.
2017-01-13 22:12:43 +01:00
Alexandre Duret-Lutz
b0ba6190b7 ltlcross: relabel unsupported atomic propisitions in %s
* bin/ltlcross.cc: Do it.
* bin/common_trans.cc: Adjust documentation.
* tests/core/ltl3ba.test: Test it.
* NEWS: Document it.
2017-01-13 22:12:43 +01:00
Alexandre Duret-Lutz
c9918f6407 minimize_wdba: fix handling of input with useless SCCs
* spot/twaalgos/minimize.cc (minimize_wdba): Diminish the color of
terminal SCCs that are incomplete, as if they had a non-accepting
sink as successor.
* spot/twaalgos/strength.hh, spot/twaalgos/strength.cc
(is_terminal_automaton): Add an option to ignore trivial SCC as we did
before, since it matters for deciding membership to the guarantee
class.
(is_safety_mwdba): Rewrite as ...
(is_safety_automaton): ... generalizating to any acceptance, and
ignoring trivial SCCs.
* bin/ltlfilt.cc, python/ajax/spotcgi.in, spot/tl/hierarchy.cc,
tests/core/ikwiad.cc: Adjust usage of is_terminal_automaton and
is_safety_automaton().
* tests/core/hierarchy.test: Add a problematic formula as test-case.
* NEWS: Mention the bug.
2017-01-12 21:02:56 +01:00
Alexandre Duret-Lutz
7d9ce0d6fc tl: mp_class() and --format=%[vw]h
Tools for deciding the class of a formula.

* spot/tl/hierarchy.cc, spot/tl/hierarchy.hh: New files.
* spot/tl/Makefile.am: Add them.
* bin/common_output.cc, bin/common_output.hh: Implement --format=%h.
* tests/core/hierarchy.test: More tests.
* NEWS: Update.
2017-01-10 22:41:11 +01:00
Alexandre Duret-Lutz
de8a248fb2 ltlfilt: add --recurrence and --persistence
* spot/twaalgos/remfin.cc, spot/twaalgos/remfin.hh
(rabin_to_buchi_maybe): Make this function public.
* bin/ltlfilt.cc: Implement the two options.
* tests/core/hierarchy.test: New file.
* tests/Makefile.am: Add it.
* NEWS: Mention the new options.
2017-01-10 16:11:11 +01:00
Alexandre Duret-Lutz
12ecb3febf twagraph: fix purge_dead_states on alternating automata
* tests/core/alternating.test: Run some of the test through
valgrind to exhibit the bug.
* spot/twa/twagraph.cc: Fix it.
2017-01-10 10:29:32 +01:00
Alexandre GBAGUIDI AISSE
ef2355a542 twaalgos: Set 'dicho' algo as default for SAT-based minimization
* python/spot/__init__.py: Handle options.
* spot/twaalgos/dtwasat.cc: Handle options.
* spot/twaalgos/postproc.cc: Handle options.
* spot/twaalgos/postproc.hh: Handle options.
* tests/core/satmin.test: Update tests.
Now use 'sat-minimize=4' to use the naive algo.
* tests/core/satmin2.test: Update tests.
Now use --sat-minimize='naive' to use the naive algo.
* tests/python/satmin.py: Update tests.
Now use 'naive=True' to use the naive algo.
2017-01-06 19:53:21 +01:00
Alexandre GBAGUIDI AISSE
67e3a4f28e spot: Add 'langmap' option with dichotomy (it helps to choose min val)
* python/spot/__init__.py: Handle 'dicho' option in 'sat_minimize'.
* spot/priv/satcommon.cc: Implement get_number_of_distinct_vals.
* spot/priv/satcommon.hh: Declare get_number_of_distinct_vals.
* spot/twaalgos/dtbasat.cc: Use get_number_of_distinct_vals.
* spot/twaalgos/dtbasat.hh: Change dichotomy function's prototype.
* spot/twaalgos/dtwasat.cc: Use get_number_of_distinct_vals.
* spot/twaalgos/dtwasat.hh: Change dichotomy function's prototype.
Handle options.
* spot/twaalgos/postproc.cc: Handle options.
* spot/twaalgos/postproc.hh: Add dicho_langmap_ var for options.
* tests/core/satmin2.test: Add tests for dichotomy.
* tests/core/satmin.test: Add tests for dichotomy.
* tests/python/satmin.py: Replace 'dichotomy' with 'dicho' option.
2017-01-06 19:53:21 +01:00
Alexandre GBAGUIDI AISSE
7046a49622 bin/autfilt.cc: Add '--highlight-languages' option
* bin/autfilt.cc: Add that option.
* tests/core/highlightstate.test: Add test.
* NEWS: Update.
2017-01-06 19:53:21 +01:00
Alexandre GBAGUIDI AISSE
9a204b770f spot: Implement dt*a_sat_minimize_assume(...) methods
* python/spot/__init__.py: Add 'assume' option.
* spot/misc/satsolver.cc: Add function to handle assumptions.
* spot/misc/satsolver.hh: Declare assumption function.
* spot/twaalgos/dtbasat.cc: Implement dtba_sat_minimize_assume.
* spot/twaalgos/dtbasat.hh: Declare it.
* spot/twaalgos/dtwasat.cc: Implement dtwa_sat_minimize_assume and
handle options.
* spot/twaalgos/dtwasat.hh: Declare it.
* spot/twaalgos/postproc.cc: Handle options.
* spot/twaalgos/postproc.hh: Use param_ var for incr and assume.
* tests/core/satmin.test: Add tests for the new function.
* tests/core/satmin2.test: Add tests for the new function.
* tests/python/satmin.py: Add tests for the new function.
2017-01-06 19:53:21 +01:00
Alexandre GBAGUIDI AISSE
ee17c2dee4 twaalgos: Implement dt*a_sat_minimize_incr(...) functions
* python/spot/__init__.py: Add 'incr' boolean argument.
* spot/twaalgos/dtbasat.cc: Implement dtba_sat_minimize_incr(...).
* spot/twaalgos/dtbasat.hh: Declare it.
* spot/twaalgos/dtwasat.cc: Implement dtwa_sat_minimize_incr(...) and
deal with options.
* spot/twaalgos/dtwasat.hh: Declare it.
* spot/twaalgos/postproc.cc: Add option --sat-minimize=incr.
* spot/twaalgos/postproc.hh: Add incr parameter.
* tests/core/satmin.test: Add tests for incremental version.
Update expected result.
* tests/core/satmin2.test: Add tests for incremental version.
* tests/python/satmin.py: Add tests for incremental version.
2017-01-06 19:53:21 +01:00
Alexandre GBAGUIDI AISSE
9acd7370b2 twaalgos: Improve data storage in SAT-minimization
* spot/misc/satsolver.hh: Make solver return vector<bool> instead of
vector<int>.
* spot/misc/satsolver.cc: Update code.
* spot/priv/Makefile.am: Add satcommon.*
* spot/priv/satcommon.hh: Declare helper class and factorize some
duplicate code of dt*asat.cc
* spot/priv/satcommon.cc: Implement helper class and factorize some
duplicate code of dt*asat.cc
* spot/twaalgos/dtbasat.cc: Declare helper, implement some functions
in dict struct and update code.
* spot/twaalgos/dtwasat.cc: Declare helper, implement some functions
in dict struct and update code.
* tests/core/readsat.cc: Update tests.
* tests/core/satmin.test: Typo.
* tests/core/satmin2.test: Update an expected result.
2017-01-06 19:53:21 +01:00
Alexandre GBAGUIDI AISSE
dfd500a559 tests: Improve tests related to SAT-minimization
* tests/core/satmin.test: Delete check for SPOT_SATSOLVER env
variable and add state numbers verification.
* tests/core/satmin2.test: Delete check for SPOT_SATSOLVER
env variable.
* tests/python/satmin.py: Delete check for SPOT_SATSOLVER
env variable.
2017-01-06 19:53:21 +01:00