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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

25
ChangeLog
View file

@ -1,3 +1,28 @@
2010-04-07 Alexandre Duret-Lutz <adl@lrde.epita.fr>
Add support for W (weak until) and M (strong release) operators.
* 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.
2010-04-12 Alexandre Duret-Lutz <adl@lrde.epita.fr>
Adjust ltl2tgba.py to call scc_filter() with the "full" option as

12
src/ltlast/binop.cc
View file

@ -1,4 +1,4 @@
// Copyright (C) 2009 Laboratoire de Recherche et Développement
// Copyright (C) 2009, 2010 Laboratoire de Recherche et Développement
// de l'Epita (LRDE).
// Copyright (C) 2003, 2005 Laboratoire d'Informatique de Paris
// 6 (LIP6), département Systèmes Répartis Coopératifs (SRC),
@ -115,6 +115,10 @@ namespace spot
return "U";
case R:
return "R";
case W:
return "W";
case M:
return "M";
}
// Unreachable code.
assert(0);
@ -126,7 +130,7 @@ namespace spot
binop*
binop::instance(type op, formula* first, formula* second)
{
// Sort the operands of associative operators, so that for
// Sort the operands of commutative operators, so that for
// example the formula instance for 'a xor b' is the same as
// that for 'b xor a'.
switch (op)
@ -139,7 +143,9 @@ namespace spot
case Implies:
case U:
case R:
// Non associative operators.
case W:
case M:
// Non commutative operators.
break;
}

11
src/ltlast/binop.hh
View file

@ -1,4 +1,4 @@
// Copyright (C) 2009 Laboratoire de Recherche et Développement
// Copyright (C) 2009, 2010 Laboratoire de Recherche et Développement
// de l'Epita (LRDE).
// Copyright (C) 2003, 2004 Laboratoire d'Informatique de Paris
// 6 (LIP6), département Systèmes Répartis Coopératifs (SRC),
@ -47,7 +47,14 @@ namespace spot
///
/// And and Or are not here. Because they
/// are often nested we represent them as multops.
enum type { Xor, Implies, Equiv, U, R };
enum type { Xor,
Implies,
Equiv,
U, //< until
R, //< release (dual of until)
W, //< weak until
M //< strong release (dual of weak until)
};
/// Build an unary operator with operation \a op and
/// children \a first and \a second.

11
src/ltlparse/ltlparse.yy
View file

@ -79,6 +79,7 @@ using namespace spot::ltl;
%token OP_OR "or operator" OP_XOR "xor operator" OP_AND "and operator"
%token OP_IMPLIES "implication operator" OP_EQUIV "equivalent operator"
%token OP_U "until operator" OP_R "release operator"
%token OP_W "weak until operator" OP_M "strong release operator"
%token OP_F "sometimes operator" OP_G "always operator"
%token OP_X "next operator" OP_NOT "not operator"
%token <str> ATOMIC_PROP "atomic proposition"
@ -95,7 +96,7 @@ using namespace spot::ltl;
%left OP_AND
/* LTL operators. */
%left OP_U OP_R
%left OP_U OP_R OP_M OP_W
%nonassoc OP_F OP_G
%nonassoc OP_X
@ -239,6 +240,14 @@ subformula: ATOMIC_PROP
{ $$ = binop::instance(binop::R, $1, $3); }
| subformula OP_R error
{ missing_right_binop($$, $1, @2, "release operator"); }
| subformula OP_W subformula
{ $$ = binop::instance(binop::W, $1, $3); }
| subformula OP_W error
{ missing_right_binop($$, $1, @2, "weak until operator"); }
| subformula OP_M subformula
{ $$ = binop::instance(binop::M, $1, $3); }
| subformula OP_M error
{ missing_right_binop($$, $1, @2, "strong release operator"); }
| OP_F subformula
{ $$ = unop::instance(unop::F, $2); }
| OP_F error

2
src/ltlparse/ltlscan.ll
View file

@ -90,6 +90,8 @@ flex_set_buffer(const char* buf)
"U" BEGIN(0); return token::OP_U;
"R"|"V" BEGIN(0); return token::OP_R;
"X"|"()" BEGIN(0); return token::OP_X;
"W" BEGIN(0); return token::OP_W;
"M" BEGIN(0); return token::OP_M;
"=0" return token::OP_POST_NEG;
"=1" return token::OP_POST_POS;

16
src/ltltest/reduccmp.test
View file

@ -40,16 +40,26 @@ for x in ../reduccmp ../reductaustr; do
# Syntactic reduction
run 0 $x 'a & (!b R !a)' 'false'
run 0 $x '(!b R !a) & a' 'false'
run 0 $x 'a & (!b R !a) & c' 'false'
run 0 $x 'c & (!b R !a) & a' 'false'
run 0 $x 'a & (!b M !a)' 'false'
run 0 $x '(!b M !a) & a' 'false'
run 0 $x 'a & (!b M !a) & c' 'false'
run 0 $x 'c & (!b M !a) & a' 'false'
run 0 $x 'a & (b U a)' 'a'
run 0 $x '(b U a) & a' 'a'
run 0 $x 'a | (b U a)' '(b U a)'
run 0 $x '(b U a) | a' '(b U a)'
run 0 $x 'a U (b U a)' '(b U a)'
run 0 $x 'a & (b W a)' 'a'
run 0 $x '(b W a) & a' 'a'
run 0 $x 'a | (b W a)' '(b W a)'
run 0 $x '(b W a) | a' '(b W a)'
run 0 $x 'a W (b W a)' '(b W a)'
run 0 $x 'a & (b U a) & a' 'a'
run 0 $x 'a & (b U a) & a' 'a'
run 0 $x 'a | (b U a) | a' '(b U a)'
@ -101,6 +111,9 @@ for x in ../reduccmp ../reductaustr; do
# reason as above.
run 0 $x 'F(a & GFb & c)' 'F(a & GFb & c)'
run 0 $x 'G(a | GFb | c)' 'G(a | c) | GFb'
run 0 $x 'Gb W a' 'Gb|a'
run 0 $x 'Fb M Fa' 'Fa & Fb'
;;
esac
@ -113,5 +126,4 @@ for x in ../reduccmp ../reductaustr; do
run 0 $x 'GFGa' 'FGa'
run 0 $x 'b R Ga' 'Ga'
run 0 $x 'b R FGa' 'FGa'
done

29
src/ltlvisit/basicreduce.cc
View file

@ -253,7 +253,8 @@ namespace spot
formula* f2 = bo->second();
unop* fu1;
unop* fu2;
switch (bo->op())
binop::type op = bo->op();
switch (op)
{
case binop::Xor:
case binop::Equiv:
@ -262,31 +263,49 @@ namespace spot
basic_reduce(f1),
basic_reduce(f2));
return;
case binop::W:
case binop::M:
case binop::U:
case binop::R:
f1 = basic_reduce(f1);
f2 = basic_reduce(f2);
// a W false = Ga
if (op == binop::W && f2 == constant::false_instance())
{
result_ = unop::instance(unop::G, f1);
return;
}
// a M true = Fa
if (op == binop::M && f2 == constant::true_instance())
{
result_ = unop::instance(unop::F, f1);
return;
}
// a U false = false
// a U true = true
// a R false = false
// a R true = true
// a W true = true
// a M false = false
if (dynamic_cast<constant*>(f2))
{
result_ = f2;
f1->destroy();
return;
}
f1 = basic_reduce(f1);
// X(a) U X(b) = X(a U b)
// X(a) R X(b) = X(a R b)
// X(a) W X(b) = X(a W b)
// X(a) M X(b) = X(a M b)
fu1 = dynamic_cast<unop*>(f1);
fu2 = dynamic_cast<unop*>(f2);
if (fu1 && fu2
&& fu1->op() == unop::X
&& fu2->op() == unop::X)
{
formula* ftmp = binop::instance(bo->op(),
formula* ftmp = binop::instance(op,
basic_reduce(fu1->child()),
basic_reduce(fu2->child()));
result_ = unop::instance(unop::X, basic_reduce(ftmp));
@ -296,7 +315,7 @@ namespace spot
return;
}
result_ = binop::instance(bo->op(), f1, f2);
result_ = binop::instance(op, f1, f2);
return;
}
/* Unreachable code. */

52
src/ltlvisit/contain.cc
View file

@ -1,4 +1,4 @@
// Copyright (C) 2009 Laboratoire de Recherche et Développement
// Copyright (C) 2009, 2010 Laboratoire de Recherche et Développement
// de l'Epita (LRDE).
// Copyright (C) 2006, 2007 Laboratoire d'Informatique de Paris 6 (LIP6),
// département Systèmes Répartis Coopératifs (SRC), Université Pierre
@ -202,6 +202,31 @@ namespace spot
result_ = binop::instance(binop::U, a, b);
}
break;
case binop::W:
// if (a W b) => b, then keep b !
if (stronger && lcc->contained(bo, b))
{
a->destroy();
result_ = b;
}
// if a => b, then a W b = b.
else if ((!stronger) && lcc->contained(a, b))
{
a->destroy();
result_ = b;
}
// if !a => b, then a W b = 1
else if (lcc->neg_contained(a, b))
{
a->destroy();
b->destroy();
result_ = constant::true_instance();
}
else
{
result_ = binop::instance(binop::W, a, b);
}
break;
case binop::R:
// if (a R b) => b, then keep b !
if (stronger && lcc->contained(b, bo))
@ -226,6 +251,31 @@ namespace spot
result_ = binop::instance(binop::R, a, b);
}
break;
case binop::M:
// if (a M b) => b, then keep b !
if (stronger && lcc->contained(b, bo))
{
a->destroy();
result_ = b;
}
// if b => a, then a M b = b.
else if ((!stronger) && lcc->contained(b, a))
{
a->destroy();
result_ = b;
}
// if a => !b, then a M b = 0
else if (lcc->contained_neg(a, b))
{
a->destroy();
b->destroy();
result_ = constant::false_instance();
}
else
{
result_ = binop::instance(binop::M, a, b);
}
break;
default:
result_ = binop::instance(bo->op(), a, b);
}

11
src/ltlvisit/lunabbrev.cc
View file

@ -1,4 +1,4 @@
// Copyright (C) 2009 Laboratoire de Recherche et Développement
// Copyright (C) 2009, 2010 Laboratoire de Recherche et Développement
// de l'Epita (LRDE).
// Copyright (C) 2003, 2004 Laboratoire d'Informatique de Paris 6 (LIP6),
// département Systèmes Répartis Coopératifs (SRC), Université Pierre
@ -44,7 +44,8 @@ namespace spot
formula* f1 = recurse(bo->first());
formula* f2 = recurse(bo->second());
switch (bo->op())
binop::type op = bo->op();
switch (op)
{
/* f1 ^ f2 == (f1 & !f2) | (f2 & !f1) */
case binop::Xor:
@ -74,9 +75,13 @@ namespace spot
return;
/* f1 U f2 == f1 U f2 */
/* f1 R f2 == f1 R f2 */
/* f1 W f2 == f1 W f2 */
/* f1 M f2 == f1 M f2 */
case binop::U:
case binop::R:
result_ = binop::instance(bo->op(), f1, f2);
case binop::W:
case binop::M:
result_ = binop::instance(op, f1, f2);
return;
}
/* Unreachable code. */

12
src/ltlvisit/nenoform.cc
View file

@ -1,4 +1,4 @@
// Copyright (C) 2009 Laboratoire de Recherche et Développement
// Copyright (C) 2009, 2010 Laboratoire de Recherche et Développement
// de l'Epita (LRDE).
// Copyright (C) 2003, 2004 Laboratoire d'Informatique de Paris 6 (LIP6),
// département Systèmes Répartis Coopératifs (SRC), Université Pierre
@ -154,6 +154,16 @@ namespace spot
result_ = binop::instance(negated_ ? binop::U : binop::R,
recurse(f1), recurse(f2));
return;
case binop::W:
/* !(a W b) == !a M !b */
result_ = binop::instance(negated_ ? binop::M : binop::W,
recurse(f1), recurse(f2));
return;
case binop::M:
/* !(a M b) == !a W !b */
result_ = binop::instance(negated_ ? binop::W : binop::M,
recurse(f1), recurse(f2));
return;
}
/* Unreachable code. */
assert(0);

10
src/ltlvisit/randomltl.cc
View file

@ -1,4 +1,4 @@
// Copyright (C) 2008, 2009 Laboratoire de Recherche et Développement
// Copyright (C) 2008, 2009, 2010 Laboratoire de Recherche et Développement
// de l'Epita (LRDE).
// Copyright (C) 2005 Laboratoire d'Informatique de Paris 6
// (LIP6), département Systèmes Répartis Coopératifs (SRC), Université
@ -102,7 +102,7 @@ namespace spot
namespace
{
const int proba_size = 14;
const int proba_size = 16;
}
random_ltl::random_ltl(const atomic_prop_set* ap)
@ -122,8 +122,10 @@ namespace spot
proba_[9].setup("xor", 3, binop_builder<binop::Xor>);
proba_[10].setup("R", 3, binop_builder<binop::R>);
proba_[11].setup("U", 3, binop_builder<binop::U>);
proba_[12].setup("and", 3, multop_builder<multop::And>);
proba_[13].setup("or", 3, multop_builder<multop::Or>);
proba_[12].setup("W", 3, binop_builder<binop::W>);
proba_[13].setup("M", 3, binop_builder<binop::M>);
proba_[14].setup("and", 3, multop_builder<multop::And>);
proba_[15].setup("or", 3, multop_builder<multop::Or>);
proba_[0].proba = ap_->size();

4
src/ltlvisit/randomltl.hh
View file

@ -1,3 +1,5 @@
// Copyright (C) 2010 Laboratoire de Recherche et Développement de
// l'Epita (LRDE).
// Copyright (C) 2005 Laboratoire d'Informatique de Paris 6 (LIP6),
// département Systèmes Répartis Coopératifs (SRC), Université Pierre
// et Marie Curie.
@ -82,6 +84,8 @@ namespace spot
/// xor 1
/// R 1
/// U 1
/// W 1
/// M 1
/// and 1
/// or 1
/// \endverbatim

105
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)
{
formula* f2 = recurse(bo->second());
binop::type op = bo->op();
formula* f2 = recurse(bo->second());
bool f2_eventual = false;
if (opt_ & Reduce_Eventuality_And_Universality)
{
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 ((opt_ & Reduce_Eventuality_And_Universality)
&& ((is_eventual(f2) && ((bo->op()) == binop::U))
|| (is_universal(f2) && ((bo->op()) == binop::R))))
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;
}
}
result_ = binop::instance(bo->op(), f1, f2);
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(op, f1, f2);
}
void

23
src/ltlvisit/simpfg.cc
View file

@ -1,3 +1,7 @@
// Copyright (C) 2010 Laboratoire de Recherche et Développement de
// l'Epita (LRDE).
// département Systèmes Répartis Coopératifs (SRC), Université Pierre
// et Marie Curie.
// Copyright (C) 2004 Laboratoire d'Informatique de Paris 6 (LIP6),
// département Systèmes Répartis Coopératifs (SRC), Université Pierre
// et Marie Curie.
@ -42,13 +46,14 @@ namespace spot
{
formula* f1 = recurse(bo->first());
formula* f2 = recurse(bo->second());
binop::type op = bo->op();
switch (bo->op())
switch (op)
{
case binop::Xor:
case binop::Implies:
case binop::Equiv:
result_ = binop::instance(bo->op(), f1, f2);
result_ = binop::instance(op, f1, f2);
return;
/* true U f2 == F(f2) */
case binop::U:
@ -64,6 +69,20 @@ namespace spot
else
result_ = binop::instance(binop::R, f1, f2);
return;
/* f1 W false == G(f1) */
case binop::W:
if (f2 == constant::false_instance())
result_ = unop::instance(unop::G, f1);
else
result_ = binop::instance(binop::W, f1, f2);
return;
/* f1 M true == F(f1) */
case binop::M:
if (f1 == constant::true_instance())
result_ = unop::instance(unop::F, f2);
else
result_ = binop::instance(binop::M, f1, f2);
return;
}
/* Unreachable code. */
assert(0);

18
src/ltlvisit/simpfg.hh
View file

@ -1,3 +1,5 @@
// Copyright (C) 2010 Laboratoire de Recherche et Développement de
// l'Epita (LRDE).
// Copyright (C) 2004 Laboratoire d'Informatique de Paris 6 (LIP6),
// département Systèmes Répartis Coopératifs (SRC), Université Pierre
// et Marie Curie.
@ -30,6 +32,14 @@ namespace spot
{
/// \brief Replace <code>true U f</code> and <code>false R g</code> by
/// <code>F f</code> and <code>G g</code>.
///
/// Perform the following rewriting (from left to right):
///
/// - true U a = F a
/// - a M true = F a
/// - false R a = G a
/// - a W false = G a
///
/// \ingroup ltl_visitor
class simplify_f_g_visitor : public clone_visitor
{
@ -46,6 +56,14 @@ namespace spot
/// \brief Replace <code>true U f</code> and <code>false R g</code> by
/// <code>F f</code> and <code>G g</code>.
///
/// Perform the following rewriting (from left to right):
///
/// - true U a = F a
/// - a M true = F a
/// - false R a = G a
/// - a W false = G a
///
/// \ingroup ltl_rewriting
formula* simplify_f_g(const formula* f);
}

67
src/ltlvisit/syntimpl.cc
View file

@ -1,4 +1,4 @@
// Copyright (C) 2009 Laboratoire de Recherche et Développement
// Copyright (C) 2009, 2010 Laboratoire de Recherche et Développement
// de l'Epita (LRDE).
// Copyright (C) 2004, 2005 Laboratoire d'Informatique de Paris 6 (LIP6),
// département Systèmes Répartis Coopératifs (SRC), Université Pierre
@ -108,7 +108,13 @@ namespace spot
// Both operand must be purely eventual, unlike in
// the proceedings of Concur'00. (The revision of
// the paper available at
// http://www1.bell-labs.com/project/TMP/ is fixed.)
// http://www.bell-labs.com/project/TMP/ is fixed.)
|| (recurse_ev(f1) && recurse_ev(f2)))
eventual = true;
return;
case binop::W:
universal = recurse_un(f1) && recurse_un(f2);
if ((f2 == constant::true_instance())
|| (recurse_ev(f1) && recurse_ev(f2)))
eventual = true;
return;
@ -118,6 +124,12 @@ namespace spot
|| (recurse_un(f1) && recurse_un(f2)))
universal = true;
return;
case binop::M:
eventual = recurse_ev(f1) && recurse_ev(f2);
if ((f2 == constant::false_instance())
|| (recurse_un(f1) && recurse_un(f2)))
universal = true;
return;
}
/* Unreachable code. */
assert(0);
@ -263,6 +275,7 @@ namespace spot
case binop::Implies:
return;
case binop::U:
case binop::W:
if (syntactic_implication(f, f2))
result_ = true;
return;
@ -285,6 +298,25 @@ namespace spot
&& syntactic_implication(f, f2))
result_ = true;
return;
case binop::M:
if (fb && fb->op() == binop::M)
if (syntactic_implication(fb->first(), f1) &&
syntactic_implication(fb->second(), f2))
{
result_ = true;
return;
}
if (fu && fu->op() == unop::F)
if (f2 == constant::true_instance() &&
syntactic_implication(fu->child(), f1))
{
result_ = true;
return;
}
if (syntactic_implication(f, f1)
&& syntactic_implication(f, f2))
result_ = true;
return;
}
/* Unreachable code. */
assert(0);
@ -480,6 +512,26 @@ namespace spot
&& syntactic_implication(f2, f))
result_ = true;
return;
case binop::W:
/* (a < c) && (c < d) => a W b < c W d */
if (fb && fb->op() == binop::W)
if (syntactic_implication(f1, fb->first()) &&
syntactic_implication(f2, fb->second()))
{
result_ = true;
return;
}
if (fu && fu->op() == unop::G)
if (f2 == constant::false_instance() &&
syntactic_implication(f1, fu->child()))
{
result_ = true;
return;
}
if (syntactic_implication(f1, f)
&& syntactic_implication(f2, f))
result_ = true;
return;
case binop::R:
if (fu && fu->op() == unop::G)
if (f1 == constant::false_instance() &&
@ -491,6 +543,17 @@ namespace spot
if (syntactic_implication(f2, f))
result_ = true;
return;
case binop::M:
if (fu && fu->op() == unop::F)
if (f2 == constant::true_instance() &&
syntactic_implication(f1, fu->child()))
{
result_ = true;
return;
}
if (syntactic_implication(f2, f))
result_ = true;
return;
}
/* Unreachable code. */
assert(0);

19
src/ltlvisit/tostring.cc
View file

@ -1,4 +1,4 @@
// Copyright (C) 2008 Laboratoire de Recherche et Développement
// Copyright (C) 2008, 2010 Laboratoire de Recherche et Développement
// de l'Epita (LRDE).
// Copyright (C) 2003, 2004 Laboratoire d'Informatique de Paris 6 (LIP6),
// département Systèmes Répartis Coopératifs (SRC), Université Pierre
@ -118,6 +118,12 @@ namespace spot
case binop::R:
os_ << " R ";
break;
case binop::W:
os_ << " W ";
break;
case binop::M:
os_ << " M ";
break;
}
bo->second()->accept(*this);
@ -276,6 +282,17 @@ namespace spot
os_ << " V ";
bo->second()->accept(*this);
break;
/* W and M are not supported by Spin */
case binop::W:
bo->first()->accept(*this);
os_ << " W ";
bo->second()->accept(*this);
break;
case binop::M:
bo->first()->accept(*this);
os_ << " M ";
bo->second()->accept(*this);
break;
}
if (!top_level)

4
src/tgba/formula2bdd.cc
View file

@ -1,4 +1,4 @@
// Copyright (C) 2009 Laboratoire de Recherche et Développement
// Copyright (C) 2009, 2010 Laboratoire de Recherche et Développement
// de l'Epita (LRDE).
// Copyright (C) 2003, 2004 Laboratoire d'Informatique de Paris
// 6 (LIP6), département Systèmes Répartis Coopératifs (SRC),
@ -107,6 +107,8 @@ namespace spot
return;
case binop::U:
case binop::R:
case binop::W:
case binop::M:
assert(!"unsupported operator");
}
/* Unreachable code. */

6
src/tgbaalgos/eltl2tgba_lacim.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).
//
// This file is part of Spot, a model checking library.
//
@ -124,6 +124,8 @@ namespace spot
return;
case binop::U:
case binop::R:
case binop::W:
case binop::M:
assert(!"unsupported operator");
}
/* Unreachable code. */

32
src/tgbaalgos/ltl2taa.cc
View file

@ -1,4 +1,4 @@
// Copyright (C) 2009 Laboratoire de Recherche et Développement
// Copyright (C) 2009, 2010 Laboratoire de Recherche et Développement
// de l'Epita (LRDE).
//
// This file is part of Spot, a model checking library.
@ -155,9 +155,14 @@ namespace spot
std::vector<succ_state>::iterator i2;
taa_tgba::transition* t = 0;
bool contained = false;
bool strong = false;
switch (node->op())
{
case binop::U: // Strong
case binop::U:
strong = true;
// fall thru
case binop::W:
if (refined_)
contained = lcc_->contained(node->second(), node->first());
for (i1 = v1.succ_.begin(); i1 != v1.succ_.end(); ++i1)
@ -168,10 +173,15 @@ namespace spot
(remove(i1->Q.begin(), i1->Q.end(), v1.init_), i1->Q.end());
i1->Q.push_back(init_); // Add the initial state
if (strong)
i1->acc.push_back(node->second());
t = res_->create_transition(init_, i1->Q);
res_->add_condition(t, i1->condition->clone());
if (strong)
res_->add_acceptance_condition(t, node->second()->clone());
else
for (unsigned i = 0; i < i1->acc.size(); ++i)
res_->add_acceptance_condition(t, i1->acc[i]->clone());
succ_.push_back(*i1);
}
for (i2 = v2.succ_.begin(); i2 != v2.succ_.end(); ++i2)
@ -181,9 +191,12 @@ namespace spot
succ_.push_back(*i2);
}
return;
case binop::R: // Weak
case binop::M: // Strong Release
strong = true;
case binop::R: // Weak Release
if (refined_)
contained = lcc_->contained(node->first(), node->second());
for (i2 = v2.succ_.begin(); i2 != v2.succ_.end(); ++i2)
{
for (i1 = v1.succ_.begin(); i1 != v1.succ_.end(); ++i1)
@ -195,10 +208,10 @@ namespace spot
if (!refined_ || !contained)
{
std::copy(i2->Q.begin(), i2->Q.end(), ii(u, u.end()));
f = multop::instance(multop::And, f, i2->condition->clone());
f = multop::instance(multop::And, f,
i2->condition->clone());
}
to_free_.push_back(f);
t = res_->create_transition(init_, u);
res_->add_condition(t, f->clone());
succ_state ss = { u, f, a };
@ -209,10 +222,17 @@ namespace spot
i2->Q.erase
(remove(i2->Q.begin(), i2->Q.end(), v2.init_), i2->Q.end());
i2->Q.push_back(init_); // Add the initial state
t = res_->create_transition(init_, i2->Q);
res_->add_condition(t, i2->condition->clone());
if (refined_)
if (strong)
{
i2->acc.push_back(node->first());
res_->add_acceptance_condition(t, node->first()->clone());
}
else if (refined_)
for (unsigned i = 0; i < i2->acc.size(); ++i)
res_->add_acceptance_condition(t, i2->acc[i]->clone());
succ_.push_back(*i2);

21
src/tgbaalgos/ltl2tgba_fm.cc
View file

@ -393,6 +393,13 @@ namespace spot
res_ = f2 | (bdd_ithvar(a) & f1 & bdd_ithvar(x));
return;
}
case binop::W:
{
// r(f1 W f2) = r(f2) + r(f1)r(X(f1 U f2))
int x = dict_.register_next_variable(node);
res_ = f2 | (f1 & bdd_ithvar(x));
return;
}
case binop::R:
{
// r(f1 R f2) = r(f1)r(f2) + r(f2)r(X(f1 U f2))
@ -400,6 +407,14 @@ namespace spot
res_ = (f1 & f2) | (f2 & bdd_ithvar(x));
return;
}
case binop::M:
{
// r(f1 M f2) = r(f1)r(f2) + a(f1)r(f2)r(X(f1 M f2))
int a = dict_.register_a_variable(node->first());
int x = dict_.register_next_variable(node);
res_ = (f1 & f2) | (bdd_ithvar(a) & f2 & bdd_ithvar(x));
return;
}
}
/* Unreachable code. */
assert(0);
@ -449,8 +464,8 @@ namespace spot
};
// Check whether a formula has a R or G operator at its top-level
// (preceding logical operators do not count).
// Check whether a formula has a R, W, or G operator at its
// top-level (preceding logical operators do not count).
class ltl_possible_fair_loop_visitor: public const_visitor
{
public:
@ -501,8 +516,10 @@ namespace spot
node->second()->accept(*this);
return;
case binop::U:
case binop::M:
return;
case binop::R:
case binop::W:
res_ = true;
return;
}

45
src/tgbaalgos/ltl2tgba_lacim.cc
View file

@ -1,4 +1,4 @@
// Copyright (C) 2009 Laboratoire de Recherche et Développement
// Copyright (C) 2009, 2010 Laboratoire de Recherche et Développement
// de l'Epita (LRDE).
// Copyright (C) 2003, 2004 Laboratoire d'Informatique de Paris 6 (LIP6),
// département Systèmes Répartis Coopératifs (SRC), Université Pierre
@ -160,7 +160,8 @@ namespace spot
bdd f1 = recurse(node->first());
bdd f2 = recurse(node->second());
switch (node->op())
binop::type op = node->op();
switch (op)
{
case binop::Xor:
res_ = bdd_apply(f1, f2, bddop_xor);
@ -172,39 +173,47 @@ namespace spot
res_ = bdd_apply(f1, f2, bddop_biimp);
return;
case binop::U:
case binop::W:
{
/*
f1 U f2 <=> f2 | (f1 & X(f1 U f2))
In other words:
now <=> f2 | (f1 & next)
*/
// f1 U f2 <=> f2 | (f1 & X(f1 U f2))
// In other words:
// now <=> f2 | (f1 & next)
int v = fact_.create_state(node);
bdd now = bdd_ithvar(v);
bdd next = bdd_ithvar(v + 1);
fact_.constrain_relation(bdd_apply(now, f2 | (f1 & next),
bddop_biimp));
/*
The rightmost conjunction, f1 & next, doesn't actually
encode the fact that f2 should be fulfilled eventually.
We declare an acceptance condition for this purpose (see
the comment in the unop::F case).
*/
if (op == binop::U)
{
// The rightmost conjunction, f1 & next, doesn't
// actually encode the fact that f2 should be
// fulfilled eventually. We declare an acceptance
// condition for this purpose (see the comment in
// the unop::F case).
fact_.declare_acceptance_condition(f2 | !now, node->second());
}
res_ = now;
return;
}
case binop::R:
case binop::M:
{
/*
f1 R f2 <=> f2 & (f1 | X(f1 R f2))
In other words:
now <=> f2 & (f1 | next)
*/
// f1 R f2 <=> f2 & (f1 | X(f1 R f2))
// In other words:
// now <=> f2 & (f1 | next)
int v = fact_.create_state(node);
bdd now = bdd_ithvar(v);
bdd next = bdd_ithvar(v + 1);
fact_.constrain_relation(bdd_apply(now, f2 & (f1 | next),
bddop_biimp));
if (op == binop::M)
{
// f2 & next, doesn't actually encode the fact that
// f1 should be fulfilled eventually. We declare an
// acceptance condition for this purpose (see the
// comment in the unop::F case).
fact_.declare_acceptance_condition(f1 | !now, node->second());
}
res_ = now;
return;
}

94
src/tgbatest/ltl2neverclaim.test
View file

@ -1,9 +1,6 @@
#!/bin/sh
# Copyright (C) 2009 Laboratoire de Recherche et Développement
# Copyright (C) 2010 Laboratoire de Recherche et Développement
# de l'Epita (LRDE).
# Copyright (C) 2004 Laboratoire d'Informatique de Paris 6 (LIP6),
# département Systèmes Répartis Coopératifs (SRC), Université Pierre
# et Marie Curie.
#
# This file is part of Spot, a model checking library.
#
@ -22,22 +19,85 @@
# Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
# 02111-1307, USA.
# Do some quick translations to make sure the neverclaim produced by
# spot actually look correct!
# This test is separate from spotlbtt.test, because lbtt-translate
# will refuse to passe M and W to a tool (spot) that masquerades as
# Spin.
. ./defs
set -e
# We don't check the output, but just running these might be enough to
# trigger assertions.
cat > config <<EOF
Algorithm
{
Name = "Spot (Couvreur -- FM)"
Path = "${LBTT_TRANSLATE}"
Parameters = "--spot '../ltl2tgba -F -f -t'"
Enabled = yes
}
run 0 ../ltl2tgba -N -x a
run 0 ../ltl2tgba -N -x 'a U b'
run 0 ../ltl2tgba -N -x 'X a'
run 0 ../ltl2tgba -N -x 'a & b & c'
run 0 ../ltl2tgba -N -x 'a | b | (c U (d & (g U (h ^ i))))'
run 0 ../ltl2tgba -N -x 'Xa & (b U !a) & (b U !a)'
run 0 ../ltl2tgba -N -x 'Fa & Xb & GFc & Gd'
run 0 ../ltl2tgba -N -x 'Fa & Xa & GFc & Gc'
run 0 ../ltl2tgba -N -x 'Fc & X(a | Xb) & GF(a | Xb) & Gc'
run 0 ../ltl2tgba -N -x 'a R (b R c)'
run 0 ../ltl2tgba -N -x '(a U b) U (c U d)'
Algorithm
{
Name = "Spot (Couvreur -- FM), with reductions"
Path = "${LBTT_TRANSLATE}"
Parameters = "--spot '../ltl2tgba -r4 -R3f -F -f -t'"
Enabled = no
}
Algorithm
{
Name = "Spot (Couvreur -- FM), degeneralized via never claim"
Path = "${LBTT_TRANSLATE}"
Parameters = "--spin '../ltl2tgba -F -f -N'"
Enabled = yes
}
Algorithm
{
Name = "Spot (Couvreur -- FM), reductions, degeneralized via never claim"
Path = "${LBTT_TRANSLATE}"
Parameters = "--spin '../ltl2tgba -F -f -r4 -R3 -N'"
Enabled = yes
}
GlobalOptions
{
Rounds = 100
Interactive = Never
# Verbosity = 5
# ComparisonCheck = no
# ConsistencyCheck = no
# IntersectionCheck = no
}
FormulaOptions
{
Size = 1...13
Propositions = 6
AbbreviatedOperators = Yes
GenerateMode = Normal
OutputMode = Normal
PropositionPriority = 50
TruePriority = 1
FalsePriority = 1
AndPriority = 10
OrPriority = 10
XorPriority = 0
# EquivalencePriority = 0
BeforePriority = 0
StrongReleasePriority = 0
WeakUntilPriority = 0
DefaultOperatorPriority = 5
}
EOF
${LBTT}
rm config

4
src/tgbatest/ltl2tgba.cc
View file

@ -71,7 +71,9 @@ U=(0 0 $0 \
accept 1) \
G=(0 0 $0) \
F=U(true, $0) \
R=!U(!$0, !$1)";
W=G($0)|U($0, $1) \
R=!U(!$0, !$1) \
M=F($0)&R($0, $1)";
return s;
}

10
src/tgbatest/spotlbtt.test
View file

@ -208,9 +208,9 @@ Algorithm
Algorithm
{
Name = "Spot (Couvreur -- FM), degeneralized, via never claim"
Name = "Spot (Couvreur -- FM), degeneralized on states"
Path = "${LBTT_TRANSLATE}"
Parameters = "--spin '../ltl2tgba -F -f -N'"
Parameters = "--spot '../ltl2tgba -F -f -t -DS'"
Enabled = yes
}
@ -272,9 +272,9 @@ Algorithm
Algorithm
{
Name = "Spot (Couvreur -- FM), pre + post reduction, via never claim"
Name = "Spot (Couvreur -- FM), pre + post reduction, degeneralized on states"
Path = "${LBTT_TRANSLATE}"
Parameters = "--spin '../ltl2tgba -F -f -N -R3 -r7'"
Parameters = "--spot '../ltl2tgba -F -f -DS -R3 -r7 -t'"
Enabled = yes
}
@ -339,8 +339,6 @@ FormulaOptions
# EquivalencePriority = 0
BeforePriority = 0
StrongReleasePriority = 0
WeakUntilPriority = 0
DefaultOperatorPriority = 5
}