2 citations · 3 across the 12 of their papers we have counts for
15 papers
Quantitative Analysis of -Regular Robust MDPs
Ali Asadi, Krishnendu Chatterjee, Ehsan Kafshdar Goharshady +3
Robust Markov Decision Processes (RMDPs) generalize classical MDPs by allowing uncertainty in transition probabilities and optimizing against their worst-case realization. We consi…
Generalized Bidding Games: Where Bidding and Stochastic Games Meet
Ali Asadi, Thomas A. Henzinger, Ehsan Kafshdar Goharshady +2
Two-player games on graphs are a classical framework for analyzing strategic decision making. In turn-based games, two players move a token along the edges of the graph, and the ri…
Automated Approach for Solving Infinite-state Polynomial Reachability Games
Krishnendu Chatterjee, Ehsan Kafshdar Goharshady, Mehrdad Karrabi +2
Reachability games are two-player games played on a graph, where the objective of player is to reach the target set whereas the objective of player…
Strongly Polynomial Time Complexity of Policy Iteration for Robust MDPs
Ali Asadi, Krishnendu Chatterjee, Ehsan Goharshady +3
Markov decision processes (MDPs) are a fundamental model in sequential decision making. Robust MDPs (RMDPs) extend this framework by allowing uncertainty in transition probabilitie…
Qualitative Analysis of -Regular Objectives on Robust MDPs
Ali Asadi, Krishnendu Chatterjee, Ehsan Kafshdar Goharshady +2
Robust Markov Decision Processes (RMDPs) generalize classical MDPs that consider uncertainties in transition probabilities by defining a set of possible transition functions. An ob…
Refuting Equivalence in Probabilistic Programs with Conditioning
Krishnendu Chatterjee, Ehsan Kafshdar Goharshady, Petr Novotný +1
We consider the problem of refuting equivalence of probabilistic programs, i.e., the problem of proving that two probabilistic programs induce different output distributions. We st…
Quantified Linear and Polynomial Arithmetic Satisfiability via Template-based Skolemization
Krishnendu Chatterjee, Ehsan Kafshdar Goharshady, Mehrdad Karrabi +3
The problem of checking satisfiability of linear real arithmetic (LRA) and non-linear real arithmetic (NRA) formulas has broad applications, in particular, they are at the heart of…
PolyQEnt: A Polynomial Quantified Entailment Solver
Krishnendu Chatterjee, Amir Kafshdar Goharshady, Ehsan Kafshdar Goharshady +4
Polynomial quantified entailments with existentially and universally quantified variables arise in many problems of verification and program analysis. We present PolyQEnt which is…
Bidding Games with Charging
Guy Avni, Ehsan Kafshdar Goharshady, Thomas A. Henzinger +1
Graph games lie at the algorithmic core of many automated design problems in computer science. These are games usually played between two players on a given graph, where the player…
Equivalence and Similarity Refutation for Probabilistic Programs
Krishnendu Chatterjee, Ehsan Kafshdar Goharshady, Petr Novotný +1
We consider the problems of statically refuting equivalence and similarity of output distributions defined by a pair of probabilistic programs. Equivalence and similarity are two f…
Sound and Complete Witnesses for Template-based Verification of LTL Properties on Polynomial Programs
Krishnendu Chatterjee, Amir Kafshdar Goharshady, Ehsan Kafshdar Goharshady +2
We study the classical problem of verifying programs with respect to formal specifications given in the linear temporal logic (LTL). We first present novel sound and complete witne…
Solving Long-run Average Reward Robust MDPs via Stochastic Games
Krishnendu Chatterjee, Ehsan Kafshdar Goharshady, Mehrdad Karrabi +2
Markov decision processes (MDPs) provide a standard framework for sequential decision making under uncertainty. However, MDPs do not take uncertainty in transition probabilities in…
Proving Non-termination by Program Reversal
Krishnendu Chatterjee, Ehsan Kafshdar Goharshady, Petr Novotný +1
We present a new approach to proving non-termination of non-deterministic integer programs. Our technique is rather simple but efficient. It relies on a purely syntactic reversal o…
Proving Almost-Sure Termination of Probabilistic Programs via Incremental Pruning
Krishnendu Chatterjee, Ehsan Kafshdar Goharshady, Petr Novotný +2
The extension of classical imperative programs with real-valued random variables and random branching gives rise to probabilistic programs. The termination problem is one of the mo…
Polynomial Invariant Generation for Non-deterministic Recursive Programs
Krishnendu Chatterjee, Hongfei Fu, Amir Kafshdar Goharshady +1
We consider the classical problem of invariant generation for programs with polynomial assignments and focus on synthesizing invariants that are a conjunction of strict polynomial…