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Add support for W (weak until) and M (strong release) operators.

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* src/ltlast/binop.cc, src/ltlast/binop.cc: Add support for
these new operators.
* src/ltlparse/ltlparse.yy, src/ltlparse/ltlscan.ll: Parse them.
* src/ltltest/reduccmp.test: Add new tests for W and M.
* src/ltlvisit/basicreduce.cc, src/ltlvisit/contain.cc,
src/ltlvisit/lunabbrev.cc, src/ltlvisit/nenoform.cc,
src/ltlvisit/randomltl.cc, src/ltlvisit/randomltl.hh,
src/ltlvisit/reduce.cc, src/ltlvisite/simpfg.cc,
src/ltlvisit/simpfg.hh, src/ltlvisit/syntimpl.cc,
src/ltlvisit/tostring.cc, src/tgba/formula2bdd.cc,
src/tgbaalgos/eltl2tgba_lacim.cc, src/tgbaalgos/ltl2taa.cc,
src/tgbaalgos/ltl2tgba_fm.cc, src/tgbaalgos/ltl2tgba_lacim.cc:
Add support for W and M.
* src/tgbatest/ltl2neverclaim.test: Test never claim output
using LBTT, this is more thorough.  Also we cannot use -N
any more in the spotlbtt.test.
* src/tgbatests/ltl2tgba.cc: Define M and W for ELTL.
* src/tgbatest/ltl2neverclaim.test: Test W and M, and use
-DS instead of -N, because lbtt-translate does not want
to translate these operators for tools that masquerade as Spin.
This commit is contained in:
Alexandre Duret-Lutz 2010-04-07 10:44:07 +02:00
parent 35a57c6dff
commit 0fc0ea3166
25 changed files with 584 additions and 123 deletions
Download patch file Download diff file Expand all files Collapse all files

111
src/ltlvisit/reduce.cc
View file

@ -1,5 +1,5 @@
// Copyright (C) 2008, 2009 Laboratoire de Recherche et Développement
// de l'Epita (LRDE).
// Copyright (C) 2008, 2009, 2010 Laboratoire de Recherche et
// Développement de l'Epita (LRDE).
// Copyright (C) 2004, 2006, 2007 Laboratoire d'Informatique de
// Paris 6 (LIP6), département Systèmes Répartis Coopératifs (SRC),
// Université Pierre et Marie Curie.
@ -110,23 +110,46 @@ namespace spot
void
visit(binop* bo)
{
binop::type op = bo->op();
formula* f2 = recurse(bo->second());
bool f2_eventual = false;
/* If b is a pure eventuality formula then a U b = b.
If b is a pure universality formula a R b = b. */
if ((opt_ & Reduce_Eventuality_And_Universality)
&& ((is_eventual(f2) && ((bo->op()) == binop::U))
|| (is_universal(f2) && ((bo->op()) == binop::R))))
if (opt_ & Reduce_Eventuality_And_Universality)
{
result_ = f2;
return;
f2_eventual = is_eventual(f2);
/* If b is a pure eventuality formula then a U b = b.
If b is a pure universality formula a R b = b. */
if ((f2_eventual && (op == binop::U))
|| (is_universal(f2) && (op == binop::R)))
{
result_ = f2;
return;
}
}
/* case of implies */
formula* f1 = recurse(bo->first());
formula* f1 = recurse(bo->first());
if (opt_ & Reduce_Eventuality_And_Universality)
{
/* If a&b is a pure eventuality formula then a M b = a & b.
If a is a pure universality formula a W b = a|b. */
if (is_eventual(f1) && f2_eventual && (op == binop::M))
{
result_ = multop::instance(multop::And, f1, f2);
return;
}
if (is_universal(f1) && (op == binop::W))
{
result_ = multop::instance(multop::Or, f1, f2);
return;
}
}
/* case of implies */
if (opt_ & Reduce_Syntactic_Implications)
{
switch (bo->op())
switch (op)
{
case binop::Xor:
case binop::Equiv:
@ -149,9 +172,10 @@ namespace spot
return;
}
/* a < b => a U (b U c) = (b U c) */
/* a < b => a U (b W c) = (b W c) */
{
binop* bo = dynamic_cast<binop*>(f2);
if (bo && bo->op() == binop::U
if (bo && (bo->op() == binop::U || bo->op() == binop::W)
&& syntactic_implication(f1, bo->first()))
{
result_ = f2;
@ -188,9 +212,68 @@ namespace spot
}
}
break;
case binop::W:
/* a < b => a W b = b */
if (syntactic_implication(f1, f2))
{
result_ = f2;
f1->destroy();
return;
}
/* !b < a => a W b = 1 */
if (syntactic_implication_neg(f2, f1, false))
{
result_ = constant::true_instance();
f1->destroy();
f2->destroy();
return;
}
/* a < b => a W (b U c) = (b U c) */
/* a < b => a W (b W c) = (b W c) */
{
binop* bo = dynamic_cast<binop*>(f2);
if (bo && (bo->op() == binop::U || bo->op() == binop::W)
&& syntactic_implication(f1, bo->first()))
{
result_ = f2;
f1->destroy();
return;
}
}
break;
case binop::M:
/* b < a => a M b = b */
if (syntactic_implication(f2, f1))
{
result_ = f2;
f1->destroy();
return;
}
/* b < !a => a M b = 0 */
if (syntactic_implication_neg(f2, f1, true))
{
result_ = constant::false_instance();
f1->destroy();
f2->destroy();
return;
}
/* b < a => a R (b R c) = b R c */
{
binop* bo = dynamic_cast<binop*>(f2);
if (bo && bo->op() == binop::R
&& syntactic_implication(bo->first(), f1))
{
result_ = f2;
f1->destroy();
return;
}
}
break;
}
}
result_ = binop::instance(bo->op(), f1, f2);
result_ = binop::instance(op, f1, f2);
}
void