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Fixes #50.

* src/tgbaalgos/cycles.cc, src/tgbaalgos/cycles.hh: Rewrite using
unsigned instead of state*, and std::vector instead of std::map.
* src/tgbaalgos/isweakscc.cc, src/tgbaalgos/powerset.cc: Adjust.

This fixes #44.

* src/bin/ltlfilt.cc: Implement -n/--max-count.
* doc/org/ltlfilt.org, src/tgbatest/randpsl.test: Use it
* NEWS: Document it.

* src/bin/ltlfilt.cc: Remove short option -n for --negate.

* src/tgbaalgos/neverclaim.cc: Make sure the any accepting initial state
is not output as an accept_all state.  This bug caused ltl2dstar.test to
fail.

Because -s can now take arguments.

* src/tgbatest/ltl2dstar2.test: Here.

* src/tgbaalgos/minimize.cc (minimize_monitor): Simplify the call to
tgba_powerset.

This helps issue #26 considerably, but I'm not closing it because there
are a few places here and there that can be cleaned up.  For instance
build_state_set in minimize.cc should be rewritten.

* src/misc/bitvect.hh (bitvector_array::clear_all): New method.
* src/tgbaalgos/powerset.cc (tgba_powerset): Rewrite it.
* src/tgbaalgos/powerset.hh (power_map): Simplify.

* src/tgbaalgos/powerset.cc: Replace std::deque by vector, and take
the return of aut->out(s) by reference.

* src/tgbaalgos/powerset.cc: Use bdd_implies.

* src/tgbaalgos/isdet.cc, src/tgbaalgos/isdet.hh: Rewrite
using the tgba_digraph interface.
* src/tgbatest/ltl2tgba.cc: Adjust call.

* src/ltltest/equals.cc: Delete.
* src/ltltest/Makefile.am: Adjust.
* src/ltltest/unabbrevwm.test: Rewrite using ltlfilt.

Fixes #46.

* src/tgbaalgos/neverclaim.cc: Add option '6'.
* src/bin/common_aoutput.cc, src/bin/dstar2tgba.cc: Make it
possible to use the option.
* NEWS, doc/org/oaut.org: Document it.
* src/tgbatest/ltlcross2.test: Test it.

* src/tgbaalgos/postproc.cc: Here.  Otherwise, reading
a neverclaim with autfilt would loose the SBA property
and degeneralize again.

* src/tgbaalgos/degen.cc: Here.

* src/tgbaalgos/neverclaim.cc, src/tgbaalgos/neverclaim.hh: Here.
Also take a string to supply options.
* src/tgbatest/ltl2tgba.cc: Adjust call.

Fixes #48.

* src/tgbaalgos/powerset.cc, src/tgbaalgos/powerset.hh: Here.
* src/tgbaalgos/minimize.cc: Adjust usage.

* doc/org/oaut.org: Show another way to perform the last computation.

* src/sanity/style.test: Check for it.
* src/dstarparse/nra2nba.cc, src/dstarparse/nsa2tgba.cc,
src/tgbaalgos/randomize.cc, src/tgbaalgos/stutter.cc: Fix all those.

The namespace dstaryy was declared inline and then reopened as
non-inline.  Likewise for hoayy.  Let's use different names.

* src/dstarparse/dstarparse.yy, src/hoaparse/hoaparse.yy: Here.

* src/ltlvisit/randomltl.cc: Make sure generation of binary operator is
done in a deterministic order.

* src/ltlvisit/mutation.cc: Force order of evaluation of arguments of
binops.

* src/tgbaalgos/sccinfo.cc, src/tgbaalgos/sccinfo.hh: add
scc_info::begin() and scc_info::end() methods to iterate over the
node_ vector.   Tidy the scc_node structure that that its member
are accessed via methods.
* src/tgbaalgos/safety.cc, src/bin/ltlcross.cc: Simplify using
this interface.

* src/sanity/style.test: Test for the missing header.
* iface/ltsmin/check.test, src/kripketest/kripke.test,
src/kripketest/parse_print_test.cc, src/ltlparse/fmterror.cc,
src/ltltest/consterm.test, src/ltltest/kind.test,
src/ltltest/length.test, src/ltltest/ltlfilt.test,
src/ltltest/reduc.cc, src/ltltest/reduc.test,
src/ltltest/reduc0.test, src/ltltest/reducpsl.test,
src/ltltest/remove_x.test, src/ltltest/unabbrevwm.test,
src/ltltest/utf8.test, src/ltltest/uwrm.test, src/ltlvisit/dump.cc,
src/ltlvisit/remove_x.cc, src/misc/casts.hh, src/misc/fixpool.hh,
src/misc/hashfunc.hh, src/misc/ltstr.hh, src/sanity/readme.test,
src/taalgos/tgba2ta.cc, src/tgbaalgos/bfssteps.cc,
src/tgbaalgos/stats.cc, src/tgbatest/acc.test,
src/tgbatest/bitvect.test, src/tgbatest/complementation.test,
src/tgbatest/cycles.test, src/tgbatest/degendet.test,
src/tgbatest/dfs.test, src/tgbatest/dupexp.test,
src/tgbatest/emptchkr.test, src/tgbatest/intvcomp.test,
src/tgbatest/ltl2ta.test, src/tgbatest/ltl2ta2.test,
src/tgbatest/ltlprod.test, src/tgbatest/maskacc.test,
src/tgbatest/obligation.test, src/tgbatest/randpsl.test,
src/tgbatest/readsat.cc, src/tgbatest/readsat.test,
src/tgbatest/scc.test, src/tgbatest/sccsimpl.test,
src/tgbatest/taatgba.test, src/tgbatest/tgbaread.test,
src/tgbatest/tripprod.test, src/tgbatest/uniq.test,
src/tgbatest/wdba.test: Add it.

* src/tgbaalgos/emptiness.hh (step): Add constructors...
* src/tgbaalgos/projrun.cc: ... to simplify this.

This avoid compiler errors about ambiguous calls and make sure we are
calling the intended algorithms everywhere (this wasn't the case).

* src/tgba/tgbaproduct.hh (product, product_at): Rename as...
(otf_product, otf_product_at): ... this.
* iface/ltsmin/modelcheck.cc, src/bin/autfilt.cc, src/bin/ltlfilt.cc,
src/tgbaalgos/minimize.cc, src/tgbaalgos/powerset.cc,
src/tgbatest/ltl2tgba.cc, src/tgbatest/checkpsl.cc,
src/tgbatest/complementation.cc, src/tgbatest/ltlprod.cc: Adjust
callers.

* src/ltlvisit/contain.cc, src/ltlvisit/contain.hh: Here.

* src/tgba/tgbasl.cc, src/tgba/tgbasl.hh, src/tgbaalgos/closure.cc,
src/tgbaalgos/closure.hh, src/tgbaalgos/stutter_invariance.cc,
src/tgbaalgos/stutter_invariance.hh, src/tgbaalgos/stutterize.cc,
src/tgbaalgos/stutterize.hh: Delete these files, and merge their
contents into...
* src/tgbaalgos/stutter.cc, src/tgbaalgos/stutter.hh: ... these two.
* src/tgba/Makefile.am, src/tgbaalgos/Makefile.am: Adjust.
* wrap/python/spot.i: Adjust.

autfilt would segfault after reading any file, because the local result_
structure used in hoaparse has the same name as the local result_
structure used in dstarparse.  For some reason I can only see this
problem using clang-3.5, not with gcc.

* src/dstarparse/dstarparse.yy, src/hoaparse/hoaparse.yy: Declare both
structures in a different namespace.

* src/tgbaalgos/lbtt.hh, src/tgbaalgos/neverclaim.hh: Remove obsolete
comments.  Reported by Claire Parquier.

* doc/org/setup.org: New file.
* doc/Makefile.am: Distribute it.
* doc/org/autfilt.org, doc/org/csv.org, doc/org/dstar2tgba.org,
doc/org/genltl.org, doc/org/ioltl.org, doc/org/ltl2tgba.org,
doc/org/ltl2tgta.org, doc/org/ltlcross.org, doc/org/ltlfilt.org,
doc/org/ltlgrind.org, doc/org/oaut.org, doc/org/randaut.org,
doc/org/randltl.org, doc/org/satmin.org, doc/org/tools.org: Use
setup.org.

* doc/org/randltl.org: The first example used to output '1' as
only random formula.  This is not very sexy.

* doc/org/spot.css: New file.
* doc/Makefile.am: Distribute it.
* doc/org/init.el.in, doc/org/.dir-locals.el: Adjust links.

The dotty output changed to be horizontal, and also
the acceptance sets are now numbers.

* doc/org/dstar2tgba.org, doc/org/ltl2tgba.org, doc/org/ltl2tgta.org,
doc/org/satmin.org: Adjust these four.

* doc/org/autfilt.org, doc/org/csv.org, doc/org/dstar2tgba.org,
doc/org/genltl.org, doc/org/ioltl.org, doc/org/ltl2tgba.org,
doc/org/ltl2tgta.org, doc/org/ltlcross.org, doc/org/ltlfilt.org,
doc/org/ltlgrind.org, doc/org/oaut.org, doc/org/randaut.org,
doc/org/randltl.org, doc/org/satmin.org, doc/org/tools.org: Here.