Invited Talks -- A Structure for Dependability Arguments -- Formal Probabilistic Analysis: A Higher-Order Logic Based Approach -- ASM Papers -- Synchronous Message Passing and Semaphores: An Equivalence Proof -- AsmL-Based Concurrency Semantic Variations for Timed Use Case Maps -- Bârun: A Scripting Language for CoreASM -- AsmetaSMV: A Way to Link High-Level ASM Models to Low-Level NuSMV Specifications -- An Executable Semantics of the SystemC UML Profile -- Alloy Papers -- Specifying Self-configurable Component-Based Systems with FracToy -- Trace Specifications in Alloy -- An Imperative Extension to Alloy -- Towards Formalizing Network Architectural Descriptions -- Lightweight Modeling of Java Virtual Machine Security Constraints -- Alloy+HotCore: A Fast Approximation to Unsat Core -- B Papers -- Supporting Reuse in Event B Development: Modularisation Approach -- Reasoned Modelling Critics: Turning Failed Proofs into Modelling Guidance -- Applying the B Method for the Rigorous Development of Smart Card Applications -- Automatic Verification for a Class of Proof Obligations with SMT-Solvers -- A Refinement-Based Correctness Proof of Symmetry Reduced Model Checking -- Development of a Synchronous Subset of AADL -- Matelas: A Predicate Calculus Common Formal Definition for Social Networking -- Structured Event-B Models and Proofs -- Refinement-Animation for Event-B — Towards a Method of Validation -- Reactivising Classical B -- Event-B Decomposition for Parallel Programs -- Z Papers -- Communication Systems in ClawZ -- Formalising and Validating RBAC-to-XACML Translation Using Lightweight Formal Methods -- Towards Formally Templated Relational Database Representations in Z -- Translating Z to Alloy -- ABZ Short Papers (Abstracts) -- B-ASM: Specification of ASM à la B -- A Case for Using Data-Flow Analysis to Optimize Incremental Scope-Bounded Checking -- On the Modelling and Analysis of Amazon Web Services Access Policies -- Architecture as an Independent Variable for Aspect-Oriented Application Descriptions -- ParAlloy: Towards a Framework for Efficient Parallel Analysis of Alloy Models -- Introducing Specification-Based Data Structure Repair Using Alloy -- Secrecy UML Method for Model Transformations -- Improving Traceability between KAOS Requirements Models and B Specifications -- Code Synthesis for Timed Automata: A Comparison Using Case Study -- Towards Validation of Requirements Models -- A Proof Based Approach for Formal Verification of Transactional BPEL Web Services -- On an Extensible Rule-Based Prover for Event-B -- B Model Abstraction Combining Syntactic and Semantic Methods -- A Basis for Feature-Oriented Modelling in Event-B -- Using Event-B to Verify the Kmelia Components and Their Assemblies -- Starting B Specifications from Use Cases -- Integrating SMT-Solvers in Z and B Tools -- Formal Analysis in Model Management: Exploiting the Power of CZT.

This book constitutes the proceedings of the Second International Conference on Abstract State Machines, B and Z, which took place in Orford, QC, Canada, in February 2010. The 26 full papers presented were carefully reviewed and selected from 60 submissions. The book also contains two invited talks and abstracts of 18 short papers which address work in progress, industrial experience reports and tool descriptions. The papers cover recent advances in four equally rigorous methods for software and hardware development: abstract state machines (ASM), Alloy, B and Z. They share a common conceptual framework, centered around the notions of state and operation, and promote mathematical precision in the modeling, verification and construction of highly dependable systems.