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and automotive products. In 1999,
Onex lost a bid to buy Air Canada.
The Onex quarterly report states: “Onex’
objective is to create long-term value by
building industry-leading businesses and to
have that value reflected in our share price.”
Onex sold Loews Cineplex in July for $2
billion. The company recently reported
having $1.6 billion in cash or near cash
assets on hand. Early this month, Onex
started a real estate firm to acquire new
properties in North America.
Other firms believed in contention were
Washington D.C.-based Carlyle Group,
Dallas’ Vought Aerospace, and BAE
Systems of the United Kingdom. GKN
PLC, believed to be an early front runner,
announced last fall it was no longer
interested.
While originally denying rumors the plant
was for sale, Boeing officials confirmed in
March 2004 that it was, in fact, looking
to sell the most productive plant in the
company’s list of U.S. holdings.
Wichita waits for sale
announcement
Continued from page 1
MoDeVVa @ ICST 2008 1 / 29
Using context descriptions and property definition
patterns for software formal verification
Philippe Dhaussy* — Julien Auvray*
Stéphane de Belloy** — Frédéric Boniol*** — Eric Landel **
* Laboratoire DTN, ENSIETA, BREST, F-29806 cedex 9
dhaussy @ensieta.fr
** THALES AIR SYSTEMS, BP 20351 - F-94628 RUNGIS Cedex
stephane.debelloy @thalesgroup.com
*** IRIT-ENSEEIHT, 2 rue C. Camichel BP 7122 - F-31071 Toulouse, cedex 7
frederic.boniol@enseeiht.fr
09/04/2008
MoDeVVa @ ICST 2008 2 / 29
Outline
1. Context and Motivations
2. Experimentations : Thales Air Systems, Airbus CSSI
3. Context Description Language (CDL)
4. Conclusion and perspectives
MoDeVVa @ ICST 2008 3 / 29
World leader for mission - critical information systems
 R&D at Thales totals €2.2bn (18% of revenues)
 25,000 researchers on cutting - edge technologies
 300 inventions per year
 Over 15,000 patents
 Over 30 cooperation agreements with universities and public research
laboratories in Europe, the United States and Asia
Thales
MoDeVVa @ ICST 2008 4 / 29
Context
Exhaustive simulation based on :
Timed automata (Rajeev Alur and David L. Dill)
Observers (Nicolas Halbwachs, Fabienne Lagnier and Pascal Raymond)
Context (Jon Whittle - Jean-Charles Roger)
Implementation : OBP (Observer-Based Prover)
Industrial experimentations
Thales Air Systems (WS/WO)
CS-SI-Airbus
Inspiration sources : [EIA 632, SPEM, Leblanc et al. 05,
Combemale et al. 06, TopCased 06, Omega project,…]
MoDeVVa @ ICST 2008 5 / 29
Motivations
 Reduce the gap between industrial developments and formal analysis
techniques
 Bypass combinatorial explosion
E M P A R
A U TO _T R A N _
F R O M _ IN N _T O _
M N N . . .
T R A N S I T IO N _
F R O M _S N N _ TO _
S N . . .
T R A N S IT IO N _
F R O M _ M N N _
T O _ S N N . . .
I M M E D I A T E _
N O TI C E _ N O R M A L>
S H O R T_
N O T I C E _
N O R M A L >
T R A N S IT IO N _
F R O M _ S N _
T O _ S N N . . .
S H U T D O W N >
T R A N S I T IO N _
F R O M _I N N _ T O _
M N N . . .
M IN I M A L _
N O T IC E _
N O R M A L >
S T A N D B Y _ N O R M A L >
D I R E C T _
T R A N S I TI O N _
F R O M _ M N N _ TO _
S N N . . .
T R A N S I T IO N _
F R O M _ M N N _ T O _
I N N . . .
T R A N S I T IO N _
F R O M _S N N _ TO _
M N N . . .
C
S A F E T Y _ K E Y _ P O S IT I O N _ C H A N G E
c n x _ to _ M N N
c n x _ to _ M N N
L E G A L _ M N N _ T O _
S N N _S T A T E _
C H A N G E _ R E Q U E S T
c n x _t o _ M N N
c n x _ to _ S N N
LE G A L_ S N _ T O _ S N N _
S TA T E _ C H A N G E _
R E Q U E S T
S A F E T Y _ K E Y _ P O S I TI O N _ C H A N G E
L E G A L _ S N N _ T O _ M N N _
S T A T E _ C H A N G E _
R E Q U E S T
[ ( S U P E R V IS I O N _ D A T A B A S E . g et _ P A A M S _ C O N F I G U R A T I O N =
C S C _ S M _ M A S T E R . C S C _ S E R V IC E S .S M _ T Y P E S . R E V IS E D _
A U T O N O M O U S A N D S U P E R V I S IO N _ D A T A B A S E .g e t_ C O N S O L E S _
A V A IL A B IL I T Y = C S C _ S M _ M A S T E R . C S C _ S E R V IC E S .S M _
TY P E S .A L L _ U N A V A I LA B L E ) ]
c n x _ to _ S N
　
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