Actors: a model of concurrent computation in distributed systems
Actors: a model of concurrent computation in distributed systems
Conditional rewriting logic as a unified model of concurrency
Selected papers of the Second Workshop on Concurrency and compositionality
Membership algebra as a logical framework for equational specification
WADT '97 Selected papers from the 12th International Workshop on Recent Trends in Algebraic Development Techniques
Verifying Continuous Time Markov Chains
CAV '96 Proceedings of the 8th International Conference on Computer Aided Verification
VESTA: A Statistical Model-checker and Analyzer for Probabilistic Systems
QEST '05 Proceedings of the Second International Conference on the Quantitative Evaluation of Systems
Spin model checker, the: primer and reference manual
Spin model checker, the: primer and reference manual
PRISM: probabilistic model checking for performance and reliability analysis
ACM SIGMETRICS Performance Evaluation Review
Intra-Object versus Inter-Object: Concurrency and Reasoning in Creol
Electronic Notes in Theoretical Computer Science (ENTCS)
A Run-Time Environment for Concurrent Objects With Asynchronous Method Calls
Electronic Notes in Theoretical Computer Science (ENTCS)
PMaude: Rewrite-based Specification Language for Probabilistic Object Systems
Electronic Notes in Theoretical Computer Science (ENTCS)
A probabilistic formal analysis approach to cross layer optimization in distributed embedded systems
FMOODS'07 Proceedings of the 9th IFIP WG 6.1 international conference on Formal methods for open object-based distributed systems
All about maude - a high-performance logical framework: how to specify, program and verify systems in rewriting logic
PVESTA: a parallel statistical model checking and quantitative analysis tool
CALCO'11 Proceedings of the 4th international conference on Algebra and coalgebra in computer science
On statistical model checking of stochastic systems
CAV'05 Proceedings of the 17th international conference on Computer Aided Verification
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Creol is an executable, formally defined modeling language with advanced object-oriented features, tailored for modeling software systems consisting of physically distributed components, each running on its own processor and communicating by means of asynchronous method calls. Creol is oriented towards qualitative analysis, abstracting away from underlying software and hardware system properties. In this paper we propose a probabilistic extension of Creol, oriented towards quantitative analysis, called PCreol, and give its operational semantics by means of probabilistic rewrite theories. This extension is motivated by the need to model a) communication over networks of different quality, b) software components running randomized algorithms, c) independent processor speeds, d) process scheduling, and e) an open environment exhibiting probabilistic behavior. The syntax of PCreol therefore includes means for modeling random expressions, a probabilistic choice operator, random assignment, call statements with priorities, and object creation statements that set an object's computation speed, as well as its quality of communication with other objects. We give details on the implementation of a prototype PCreol interpreter--on top of the existing one for Creol--which is executable in Maude. Furthermore, we integrate PCreol with the VeStA tool, to support probabilistic reasoning of PCreol models by statistical model checking and quantitative analysis. By probabilistic modeling of independent processor speeds, representative runs of a PCreol model are obtained using discrete-event simulation, and the model checking problem of large models becomes feasible. We provide concrete examples of PCreol models and show how VeStA can be used to reason about them.