Regular Linear Temporal Logic

Abstract

We present regular linear temporal logic (RLTL), a logic that generalizes linear temporal logic with the ability to use regular expressions arbitrarily as sub-expressions. Every LTL operator can be defined as a context in regular linear temporal logic. This implies that there is a (linear) translation from LTL to RLTL. Unlike LTL, regular linear temporal logic can define all omega-regular languages, while still keeping the satisfiability problem in PSPACE. Unlike the extended temporal logics ETL_*, RLTL is defined with an algebraic signature. In contrast to the linear time mu-calculus, RLTL does not depend on fix-points in its syntax.