  We present Montre, a monitoring tool to search patterns specified by timed
regular expressions over real-time behaviors. We use timed regular expressions
as a compact, natural, and highly-expressive pattern specification language for
monitoring applications involving quantitative timing constraints. Our tool
essentially incorporates online and offline timed pattern matching algorithms
so it is capable of finding all occurrences of a given pattern over both logged
and streaming behaviors. Furthermore, Montre is designed to work with other
tools via standard interfaces to perform more complex and versatile tasks for
analyzing and reasoning about cyber-physical systems. As the first of its kind,
we believe Montre will enable a new line of inquiries and techniques in these
fields.
