I will be giving a one-day class on proof & test with SPARK 2014 at STRESS
international school this coming October. The program also includes classes on
symbolic execution of SPARK programs with Bakar Kiasan, prototype-driven
development of process-oriented web applications with DyWA, SMT solving with
CVC4 and model checking with Kind 2. A very exciting mix!
I should also stress that Corfu must provide a rather relaxing surrounding
around this time of the year, despite the name of the school. See you there...
--
Yannick Moy, Senior Software Engineer, AdaCore
==========================================================================================
2014 International School on
Tool-based Rigorous Engineering of Software Systems (STRESS 2014)
(Associated with ISoLA 2014 -- 6th International Symposium on
Leveraging Applications of Formal Methods)
October 3 - 7, 2012
Corfu, Greece
"STRESSING rigorous, tool-based, development approaches to software
engineering"
http://santos.cis.ksu.edu/STRESS/2014/
The International School on Tool-based Rigorous Engineering of Software Systems
(STRESS)
series aims to provide top-quality lectures and innovative pedagogical material
that
provide young researchers with:
* instruction in existing and emerging formal methods and software engineering
techniques
that are tool-supported and process-oriented,
* insights into how software is developed in the real world, including emphasis
on domains
such as safety/mission-critical software and embedded systems where the
development
effort associated with tool-based formal methods promises greatest returns,
* case-studies and example domains in which formal methods have been
successfully
transitioned into actual development along with insights in how to bridge the
gap
between research tools and actual development processes, and
* additional pedagogical resources and personal contacts that they can explore
for the
purpose of increasing the impact of their research.
The theme of the 2014 International School is on Software Specification,
Verification, and
Variation. It features lecturers from academic and industry with significant
experience in
software contract, software analysis and certification, and software product
lines.
Lectures will emphasize the use of program analyzers and verifiers,
model-driven development and software architecture tools, and industry-relevant
challenge
problems.
--------
Lectures
--------
Introduction to Verification with Spark 2014
Lecturer: Yannick Moy (AdaCore)
SPARK 2014 is the latest evolution of the SPARK programming language. Based on
Ada 2012,
it encompasses a rich subset of the language and augments it with further
language
contracts designed to support advanced static verification techniques.
This lecture will provide a broad overview of the SPARK 2014 language: the
subset of Ada
2012 which it includes and the additional constructs which it adds to support
verification. The morning session will cover basic features and static analysis
techniques. This will be followed by an introduction to one of the most novel
features of
the language - the dual nature of the contracts as both executable and
mathematical
statements and how these can be verified by testing, proof, or a combination of
the two.
In the afternoon, the tutorial will look at more advanced language features
that are
essential for industrial-scale specification, such as abstraction and
refinement.
We will also look at more advanced verification techniques supported by the
language
such as information flow analysis and proving the absence of run-time exceptions
(divide-by-zero, numeric overflow). Finally, we will touch on some of the more
advanced
proof techniques that may be required.
Bakar Kiasan – A Certifying Program Verifier for High-Integrity Systems
Lecturers: Robby (Kansas State University) and John Hatcliff (Kansas State
University)
Software-dependent critical systems that impact daily life are rapidly
increasing in
number, size, and complexity. Unfortunately, inadequate software and systems
engineering
can lead to accidents that cause economic disaster, injuries or death. There is
a growing
reliance on development and verification tools to reduce costs, better manage
complexity,
and to increase confidence in these systems. Recent standards for critical
systems have
an increased emphasis on characterizing the requirements of tools used in the
certification context and the particular certification obligations that these
tools can
discharge. In the case of avionics, DO-333 explicitly addresses the role/use of
formal
methods tools, e.g., allowing formal verification of code compliance to
procedure
contracts to replace unit testing.
This lecture presents the next generation Bakar Kiasan verifier in the Sireum
platform
(sireum.org). Bakar Kiasan is a certifying symbolic execution-based program
verifier for
high-integrity critical systems written using the Spark 2014 safe subset of Ada
2012.
It checks conformance of Spark programs against their contracts and produce
evidence for
its analysis results. For example, it produces counter-examples and test cases
for
contract violations. In addition, Bakar Kiasan produces test cases to
illustrate contract
satisfactions as well as machine-checkable proofs for its contract
verifications.
The lecture will present foundations of symbolic execution, discuss how
evidence can be
generated from symbolic execution-based analysis, and will provide hands-on
exercises
using Bakar Kiasan to verify Spark 2014 program units.
SCCE: Variability and Evolution through Integrated Domain, Data and Process
Modeling
Lecturers: Bernhard Steffen (TU Dortmund), Tiziana Margaria (University of
Potsdam),
Stefan Naujokat (TU Dortmund), and Johannes Neubauer (TU Dortmund)
Domain-specific tool support is the key towards opening development
responsibility for
a wider public without dedicated programming knowledge. This is, for example,
important in
areas like business process modelling or scientific workflows. The intention
behind the
tools and methods presented in this lecture lies in providing domain experts
with
appropriate (non-programming) tools, so that they can solve problems within
their domain
in a non-technical way and even construct domain-specific software products
without
dedicated programming knowledge.
In the first session of this lecture we will introduce the Dynamic Web
Application (DyWA)
framework that supports the prototype-driven development of process-oriented web
applications. It is a generic, fully functional prototype that accompanies the
development
right from the beginning, offering a web-based definition facility for
application domains
in terms of type schemata that captures the data types and their associations.
The session
will provide hands-on experience on domain modeling with DyWA which
automatically
generates the (complex) modeled data structures together with their fully
executable
access functionality.
The second session focuses on ‘breathing life’ into the DyWA domain models via
the process
modeling environment jABC4. In particular, it will illustrate the power of
prototype-driven process development throughout the whole system lifecylce,
with a focus
on system evolution and system migration.
The third session presents Cinco, a particularly powerful application of our
process
modeling framework based on the Eclipse ecosystem. Cinco is a meta tooling
suite for
generating domain-specific graphical development tools in terms of fully
operative
Eclipse products. It can be regarded as a domain-specific instance of generic
meta
modeling frameworks such as Eclipse EMF/Graphiti which radically eases their
use through
its domain-specific focus. Cinco is an application of our process modeling and
design
framework jABC4 as all the required transformations, be they model-to-model or
model-to-code, are modeled with jABC4 so that they can also be developed without
specific programming knowledge. Please note that Cinco is a prime example for
bootstrapping. It is a tool for delevoping domain-specific development tools
that is build
with a domain-specific development tool (jABC4). Indeed, the next version of
jABC4,
jABC5 will be constructed in this very fashion. In the hands-on tutorial part
of this
session the participants will use Cinco to create a full graphical DSL modeling
tool of
their choice (e.g., for State Charts, Petri Nets, BPMN, Timed Automata, or even
architectural models or industrial plant layouts) consisting of an abstract
specification
describing its structure and appearance, accompanied by a code generator that
is modeled
in jABC4 using modeling components generated from the very same specification.
SMT-LIB and Kind
Lecturer: Cesare Tinelli (University of Iowa)
Many problems in computer science, in particular in formal methods, can be
reduced to
checking the satisfiability of a formula in some logic. Several of these
problems can be
naturally formulated as Satisfiability Modulo Theories (SMT) problems which are
about
checking the satisfiability of first-order formulas with respect to some
logical theory T
of interest. SMT differs from general automated deduction in that the
background theory T
need not be finitely or even first-order axiomatizable, and specialized
inference methods
are used for each theory. By being theory-specific and restricting their
language to
certain classes of formulas, these specialized methods can be implemented in
solvers that
are more efficient in practice than general-purpose theorem provers. SMT
solvers have been
used successfully in several application ares including hardware verification,
equivalence
checking, bounded and unbounded model checking, predicate abstraction, static
analysis,
automated test case generation, extended static checking, and type checking.
The first session of this lecture will start with an overview of SMT and its
applications,
followed by exercises using SMT solvers supporting the standard SMT-LIB input
format, with
a focus on the CVC4 solver. CVC4 is a widely-used open-source SMT solver
supporting a rich
set of logical theories including the theory of arrays, bit vectors, linear
integer and
real arithmetic, algebraic data types and strings.
The second session will give a brief overview of model checking techniques
relying on SMT
solvers, and show how to use the SMT-based Kind 2 model checker to prove
invariant
properties of transition systems. Kind 2 checks multiple properties
simultaneously by
running in parallel several model checking engines based on such techniques as
bounded
model checking (BMC), k-induction, IC3/PDR, and automatic invariant generation.
The engines cooperate by exchanging information about the proven or disproven
properties
as well as auxiliary invariants. Examples and exercises will use transition
systems and
properties specified in the synchronous data flow language Lustre.
---------------
Important Dates
---------------
Early Registration Deadline: Sept. 1, 2014.
STRESS 2014: October 3-7, 2014.
-----
Venue
-----
STRESS is associated with the International Symposium on Leveraging Applications
of Formal Methods (ISoLA 2014). It will be held at the Grecotel Corfu Imperial
(http://www.corfuimperial.com/).
More information is available from the ISoLA 2014 general information page
(http://www.cs.uni-potsdam.de/isola/isola2014/general_information.html).
------------------------------
Registration and Accommodation
------------------------------
Please register and view accommodation information via ISoLA 2014 site
(http://www.cs.uni-potsdam.de/isola/isola2014/registration.html).
--------------------
Organizing Committee
--------------------
* John Hatcliff (Kansas State Univerisity)
* Tiziana Margaria (University of Potsdam)
* Robby (Kansas State Univerisity)
* Bernhard Steffen (TU Dortmund)
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