Constantin Enea

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We propose a logic-based framework for automated reasoning about sequential programs manipulating singly-linked lists and arrays with unbounded data. We introduce the logic SLAD, which allows combining shape constraints, written in a fragment of Separation Logic, with data and size constraints. We address the problem of checking the entailment between SLAD(More)
We define a logic, called CSL, for the specification of complex data structures, and we show its use in program verification. Our framework allows to handle programs with dynamic linked structures and arrays carrying unbounded data, as well as the composition of these structures. The formulas in CSL allow a limited form of alternation between existential(More)
We address the verification problem of eventual consistency of optimistic replication systems. Such systems are typically used to implement distributed data structures over large scale networks. We introduce a formal definition of eventual consistency that applies to a wide class of existing implementations, including the ones using speculative executions.(More)
We address the issue of automatic invariant synthesis for sequential programs manipulating singly-linked lists carrying data over infinite data domains. We define for that a framework based on abstract interpretation which combines a specific finite-range abstraction on the shape of the heap with an abstract domain on sequences of data, considered as a(More)
We introduce a fragment of separation logic, called NOLL, for automated reasoning about programs manipulating overlaid and nested linked lists, where overlaid means that the lists may share the same set of objects. The distinguishing features of NOLL are: (1) it is parametrized by a set of user-defined predicates specifying nested linked list segments, (2)(More)
We present a (semi-)decision procedure for checking entailment between separation logic formulas with inductive predicates specifying complex data structures corresponding to finite nesting of various kinds of linked lists: acyclic or cyclic, singly or doubly linked, skip lists, etc. The decision procedure is compositional in the sense that it reduces the(More)
Security protocols are prescribed sequences of interactions between entities designed to provide various security services across distributed systems. Security protocols are often wrong due to the extremely subtle properties they are supposed to ensure. Deciding whether or not a security protocol assures secrecy is one of the main challenge in this area. In(More)
We address the problem of automatic synthesis of assertions on sequential programs with singly-linked lists containing data over infinite domains such as integers or reals. Our approach is based on an accurate abstract inter-procedural analysis. Program configurations are represented by graphs where nodes represent list segments without sharing. The data in(More)
We present a variant of ATL with distributed knowledge operators based on a synchronous and perfect recall semantics. The coalition modalities in this logic are based on partial observation of the full history, and incorporate a form of cooperation between members of the coalition in which agents issue their actions based on the distributed knowledge, for(More)
Efficient implementations of concurrent objects such as semaphores, locks, and atomic collections are essential to modern computing. Yet programming such objects is error prone: in minimizing the synchronization overhead between concurrent object invocations, one risks the conformance to reference implementations --- or in formal terms, one risks violating(More)