* NEWS, configure.ac, doc/org/tools.org: Bump version to 1.2.

* src/tgbaalgos/postproc.cc: Initialize option
variables when opt is not given.

We still want to remain compatible with Bison 2.7 so instead of fixing
all the new errors reported by 3.0 we silence some warning.  We should
fix these for good once Bison 3.0 is more widespread.

* m4/bison.m4: New file. Test if bison support -Wno-empty-rule and
-Wno-deprecated.  Define BISON and BISON_EXTRA_FLAGS.
* configure.ac: Do not test for yacc, use the above test instead.
* src/dstarparse/Makefile.am, src/eltlparse/Makefile.am,
src/kripkeparse/Makefile.am, src/ltlparse/Makefile.am,
src/neverparse/Makefile.am, src/tgbaparse/Makefile.am: Use BISON
and BISON_EXTRA_FLAGS.
* src/ltlparse/ltlparse.yy: Fix or and remove useless %right/%nonassoc
settings.
* src/eltlparse/eltlparse.yy: Likewise, and remove "%pure-parser".

* src/ltltest/latex.test: Use latexmk -pvc- like in doc/tl/Makefile.am.
Reported by Étienne Renault.

And also speedup implication checks for Boolean expressions.

* src/ltlvisit/simplify.cc: Improve implication-based rules
rules for multops by checking one operand against all the
other at once (instead of one by one).  Do not break
Boolean expressions while performing implication checks.
* src/ltlvisit/simplify.hh: Typo.
* src/ltltest/reduccmp.test: More tests.

* src/ltlast/formula.hh (is_literal): Rename as...
(get_literal): ... this.
(is_literal): New method.
(formula_ptr_less_than_multop): Rename as...
(formula_ptr_less_than_bool_first): ... this.
* src/ltlast/binop.cc: Use formula_ptr_less_than_bool_first.
* src/ltlast/multop.cc, src/ltlast/formula.cc: Adjust
to renamings.

* src/ltlast/Makefile.am: Include lib/ in search path.
* src/ltlast/atomic_prop.cc, src/ltlast/automatop.cc,
src/ltlast/binop.cc, src/ltlast/bunop.cc,
src/ltlast/constant.cc, src/ltlast/formula_tree.cc,
src/ltlast/multop.cc, src/ltlast/nfa.cc,
src/ltlast/refformula.cc, src/ltlast/unop.cc: Include
config.h.

* src/ltlast/multop.cc, src/ltlast/multop.hh (multop::boolean_operands,
multop::boolean_count): New methods.
* src/ltlvisit/relabel.cc, src/ltlvisit/relabel.hh
(relabel): Take an optional relabeling_map as parameter.
(relabel_bse): New.
* src/ltltest/ltlrel.test, src/ltltest/ltlrel.cc: New files.
* src/ltltest/Makefile.am: Add them.
* src/bin/ltlfilt.cc: Add option --relabel-bool.
* src/ltltest/ltlfilt.test: Test it.
* NEWS: Mention it.
* doc/org/ltlfilt.org: Illustrate it.

This helps recursive implication checks.  Also order
atomic propositions with strverscmp().

* src/ltlast/formula.hh (formula_ptr_less_than_multop,
is_literal, atomic_prop_cmp): New.
* src/ltlast/formula.cc (is_literal, atomic_prop_cmp): Implement them.
* src/ltlast/multop.cc: Use formula_ptr_less_than_multop.
* src/ltltest/isop.test, src/ltltest/ltlfilt.test,
src/tgbatest/det.test, src/tgbatest/dstar.test,
src/tgbatest/explicit.test, src/tgbatest/explpro2.test,
src/tgbatest/explpro3.test, src/tgbatest/explprod.test,
src/tgbatest/nondet.test, src/tgbatest/tripprod.test: Adjust tests.
* NEWS: Mention the new order.

* lib/strverscmp.c, m4/strverscmp.m4: New files.
* lib/Makefile.am, m4/gnulib-cache.m4, m4/gnulib-comp.m4: Update.

* src/tgbaalgos/gtec/ce.cc, src/tgbaalgos/reducerun.cc: Remove
superfluous definition of state_set.  Reported by František Blahoudek.

* src/bin/common_output.cc: Add option --format and implement
it.
* src/bin/ltlfilt.cc, src/bin/randltl.cc: Document the
supported %-sequences.
* src/bin/genltl.cc: Document the %-sequences, and supply
the name of the pattern to output_formula().
* doc/org/genltl.org, doc/org/ioltl.org, doc/org/ltlfilt.org,
NEWS: Document it.
* src/ltltest/latex.test: Use it.

* bench/dtgbasat/: New directory.
* bench/Makefile.am: New file.
* configure.ac, README: Adjust.

* doc/org/satmin.org, doc/org/satmin.tex: New files.
* doc/Makefile.am: Add them.
* doc/org/tools.org: Point to satmin.org.
* NEWS: Mention satmin.html.

* src/tgbaalgos/dtbasat.cc: Skip variables of the form <q,q',q,q'>C or
<q,q',q,q'>R and replace them by <q,q'>G.

* src/tgbaalgos/dtgbasat.cc: Here.

Reuse the existing <q1,q1',q1,q1',0,0> instead.

* src/tgbaalgos/dtgbasat.cc: Simplify.

* src/tgbaalgos/dtbasat.cc, src/tgbaalgos/dtgbasat.cc: Here.

* src/tgbaalgos/degen.cc: Here.
* src/tgbatest/degenid.test: Add a test case that is improved
by this.
* src/tgbatest/ltl2ta.test, src/tgbatest/ltl2tgba.test: Adjust.

* src/tgbaalgos/dtbasat.cc, src/tgbaalgos/dtgbasat.cc: Throw
exceptions on write errors.

* src/misc/satsolver.hh (clause_counter): New class.
* src/tgbaalgos/dtbasat.cc, src/tgbaalgos/dtgbasat.cc: Use it.

* src/tgbaalgos/degen.cc: Implement it.
* src/tgbatest/degenid.test: New test cases.

* src/tgbaalgos/postproc.cc: Handle negative values for
sat_minimize_ as a force option.

* src/tgbaalgos/postproc.cc: Compute original_acc before calling
scc_filter(), and do not degeneralize the automaton before calling
tba_determinize() even when building a BA.

* src/tgbaalgos/dtbasat.cc, src/tgbaalgos/dtgbasat.cc: Greatly reduce
the number of clauses and variable by removing any path variable that
reference a reference transition that is not in a SCC.

Thanks to Rüdiger Ehlers for his helpful email.

* src/tgbaalgos/dtbasat.cc, src/tgbaalgos/dtgbasat.cc: Here.

* src/ltlvisit/tostring.cc, src/ltlvisit/tostring.hh
(to_latex_string): New function.
* src/bin/common_output.cc, src/bin/common_output.hh:
Add a --latex option.
* doc/tl/spotltl.sty: New file.
* doc/tl/Makefile.am: Distribute it.
* src/ltltest/latex.test: New test.
* src/ltltest/Makefile.am: Add it.
* NEWS: Mention it.

* src/misc/satsolver.cc, src/misc/satsolver.hh (satsolver_get_solution):
New function, that accepts a solution split on multiple 'v ' lines.
* src/tgbaalgos/dtbasat.cc, src/tgbaalgos/dtgbasat.cc (get_solution):
Remove, and adjust existing code to use satsolver_get_solution().
* src/tgbatest/readsat.cc, src/tgbatest/readsat.test: New files.
* src/tgbatest/Makefile.am: Add them.
* src/bin/man/spot-x.x: Mention the SAT competition rules for
the expected input/output format.

* src/tgbaalgos/postproc.cc, src/tgbaalgos/postproc.hh: Tweak set_pref()
to also accept Any|Complete, Small|Complete, or Deterministic|Complete.
* src/bin/common_post.hh, src/bin/common_post.cc: Add option --complete
and set comp.
* src/bin/dstar2tgba.cc, src/bin/ltl2tgba.cc, src/bin/ltl2tgta.cc: Pass
comp to set_pref().
* src/tgbaalgos/complete.cc: Preserve state-based acceptance.
* src/tgbatest/dstar.test, src/tgbatest/ltlcross2.test,
src/tgbatest/nondet.test: Augment tests.
* doc/org/dstar2tgba.org, doc/org/ltl2tgba.org, NEWS: Document.

* src/tgbaalgos/dbacomp.cc, src/tgbaalgos/dbacomp.hh
(dba_complement): Rename to...
* src/tgbaalgos/dtgbacomp.cc, src/tgbaalgos/dtgbacomp.hh
(dtgba_complement): ... this.
* src/tgbaalgos/minimize.cc, src/tgbaalgos/powerset.cc,
src/tgbatest/ltl2tgba.cc, src/bin/ltlcross.cc,
src/tgbaalgos/Makefile.am: Adjust to name change.

* src/tgbaalgos/dtbasat.cc, src/tgbaalgos/dtbasat.hh:
(dtba_sat_minimize): Split into...
(dtba_sat_synthetize, dtba_sat_minimize): These.
(dtba_sat_minimize_dichotomy): New function.
* src/tgbaalgos/dtgbasat.cc, src/tgbaalgos/dtgbasat.hh
(dtgba_sat_minimize, dtgba_sat_synthetize): Likewise.
* src/tgbatest/ltl2tgba.cc: Adjust to new interface.
* src/tgbaalgos/postproc.cc, src/tgbaalgos/postproc.hh:
Cleanup option processing for SAT options.
* src/tgbatest/satmin.test: Adjust.
* src/bin/spot-x.cc, src/bin/man/spot-x.x, NEWS: Document.

* src/tgbaalgos/postproc.cc, src/tgbaalgos/postproc.hh:
Implement the wdba-minimize option.
* src/bin/spot-x.cc (wdba-minimize): Document.
* src/bin/man/spot-x.x: Update references.