**General Actions:**

YoungMin Kwon, Gul Agha

We propose a new probabilistic temporal logic, iLTL, which captures properties of systems whose state can be represented by probability mass functions (pmfs). Using iLTL, we can specify reachability to a state (i.e., a pmf), as well as properties representing the aggregate (expected) behavior of a system. We then consider a class of systems whose transitions are governed by a Markov Chain-in this case, the set of states a system may be in is specified by the transitions of pmfs from all potential initial states to the final state. We then provide a model checking algorithm to check iLTL properties of such systems. Unlike existing model checking techniques, which either compute the portions of the computational paths that satisfy a specification or evaluate properties along a single path of pmf transitions, our model checking technique enables us to do a complete analysis on the expected behaviors of large-scale systems. Desirable system parameters may also be found as a counterexample of a negated goal. Finally, we illustrate the usefulness of iLTL model checking by means of two examples: assessing software reliability and ensuring the results of administering a drug.

Keywords: *Probabilistic model checking, linear temporal logic, Discrete Time Markov Chain, pharmacokinetics*

IEEE Transactions on Software Engineering 37(1), pages 126-141, January 2011, IEEE Press, Piscataway, NJ, USA

@article{KwonTSE2011, author = {Kwon, YoungMin and Agha, Gul}, title = {Verifying the Evolution of Probability Distributions Governed by a DTMC}, journal = {IEEE Transactions on Software Engineering}, volume = 37, number = 1, month = jan, year = 2011, issn = {0098-5589}, pages = {126--141}, doi = {10.1109/TSE.2010.80}, url = {http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=5557891}, acmid = {1936543}, publisher = {IEEE Press}, address = {Piscataway, NJ, USA}, keywords = {Probabilistic model checking, linear temporal logic, Discrete Time Markov Chain, pharmacokinetics}}

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