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Sobeih, Ahmed A.; Viswanathan, Mahesh; Hou, Jennifer C. (200504)Network simulators perform well in evaluating the performance of network protocols, but lack the capability of verifying their correctness. In order to address this lacuna, we have extended the J Sim network simulator ...
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Chadha, Rohit; Legay, Axel; Prabhakar, Pavithra; Viswanathan, Mahesh (Springer Verlag, 2009)We present uniform approaches to establish complexity bounds for decision problems such as reachability and simulation, that arise naturally in the verification of timed software systems. We model timed software systems ...
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Alur, Rajeev; Kumar, Viraj; Madhusudan, P.; Viswanathan, Mahesh (200504)We study congruences on words in order to characterize the class of visibly pushdown languages (VPL), a subclass of contextfree languages. For any language L, we define a natural congruence on words that resembles the ...
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Chadha, Rohit; Viswanathan, Mahesh (200706)We consider the problem of verifying the safety of wellstructured transition systems (WSTS) with auxiliary storage. WSTSs with storage are automata that have ( possibly) infinitely many control states along with an auxiliary ...
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Prabhakar, Pavithra; Vladimerou, Vladimeros; Viswanathan, Mahesh; Dullerud, Geir E. (200801)The paper shows the decidability of the reachability problem for planar, monotonic, linear hybrid automata without resets. These automata are a special class of linear hybrid automata with only two variables, whose flows ...
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Sobeih, Ahmed A.; Viswanathan, Mahesh; Hou, Jennifer C. (200407)Existing network simulators perform reasonably well in evaluating the performance of network protocols, but lack the capability of verifying the correctness of network protocols. In this paper, we present our ongoing ...
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Vardhan, Abhay; Viswanathan, Mahesh (200508)We present a new model checking algorithm for verifying computation tree logic (CTL) properties. Our technique is based on using language inference to learn the fixpoints necessary for checking a CTL formula instead of ...
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Vardhan, Abhay; Sen, Koushik; Viswanathan, Mahesh; Agha, Gul A. (200406)We present a novel approach for verifying safety properties of finite state machines communicating over unbounded FIFO channels that is based on applying machine learning techniques. We assume that we are given a model of ...
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Kumar, Viraj; Madhusudan, P.; Viswanathan, Mahesh (200606)Boolean programs with recursion are convenient abstractions of sequential, imperative programs. Recursive state machines (RSM) serve as machine models for Boolean programs and are semantically equivalent to pushdown automata. ...
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Sen, Koushik; Viswanathan, Mahesh (200601)In order to make multithreaded programming manageable, programmers often follow a design principle where they break the problem into tasks which are then solved asynchronously and concurrently on different threads. This ...
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Sen, Koushik; Viswanathan, Mahesh; Agha, Gul A. (200601)We investigate the problem of model checking Intervalvalued Discretetime Markov Chains (IDTMC). IDTMCs are discretetime finite Markov Chains for which the exact transition probabilities are not known. Instead in IDTMCs, ...
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Sen, Koushik; Viswanathan, Mahesh; Agha, Gul A. (200412)Statistical methods to model check stochastic systems have been, thus far, developed only for a sublogic of continuous stochastic logic (CSL) that does not have steady state operators and unbounded until formulas. In this ...
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Chadha, Rohit; Sistla, A. Parsad; Viswanathan, Mahesh (200902)The continuous runtime monitoring of the behavior of a system is a technique that is used both as a complementary approach to formal verification and testing to ensure reliability, as well as a means to discover emergent ...
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Chadha, Rohit; Sistla, A. Parsad; Viswanathan, Mahesh (200902)The continuous runtime monitoring of the behavior of a system is a technique that is used both as a complementary approach to formal verification and testing to ensure reliability, as well as a means to discover emergent ...
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Chadha, Rohit; Sistla, A. Parsad; Viswanathan, Mahesh (2009)Probabilistic B\"{u}chi Automata (\PBA) are randomized, finite state automata that process input strings of infinite length. Based on the threshold chosen for the acceptance probability, different classes of languages can ...
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Kini, Dileep; Viswanathan, Mahesh (2015)LTL\GU is a fragment of linear temporal logic (LTL), where negations appear only on propositions, and formulas are built using the temporal operators X (next), F (eventually), G (always), and U (until, with the restriction ...
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Hendrix, Joe; Ohsaki, Hitoshi; Viswanathan, Mahesh (200602)In the paper, we introduce a new tree automata framework, called propositional tree automata, capturing the class of tree languages that are closed under an equational theory and Boolean operations. This framework originates ...
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Korthikanti, Vijay Anand; Viswanathan, Mahesh; Kwon, YoungMin; Agha, Gul A. (2010)We consider Markov Decision Processes (MDPs) as transformers on probability distributions, where with respect to a scheduler that resolves nondeterminism, the MDP can be seen as exhibiting a behavior that is a sequence of ...
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Roohi, Nima; Viswanathan, Mahesh (Springer, 20140623)Initialized hybrid automata with linear differential inclusions and rectangular constraints are hybrid automata where the invariants, guards, resets, and initial values are given by rectangular constraints, the flows are ...
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Sobeih, Ahmed A.; d'Amorim, Marcelo; Viswanathan, Mahesh; Marinov, Darko; Hou, Jennifer C. (200708)Verification and Validation (V&V) is a critically important phase in the development life cycle of a simulation model. In the context of network simulation, traditional network simulators perform well in using a simulation ...
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Now showing items 120 of 20