HANDLING NON LEFT-LINEAR RULES WHEN COMPLETING TREE AUTOMATA
Abstract
This paper addresses the following general problem of tree regular model-checking: decide whether where
is the reflexive and transitive closure of a successor relation induced by a term rewriting system
, and
and
are both regular tree languages. We develop an automatic approximation-based technique to handle this – undecidable in general – problem in the case when term rewriting system rules are non left-linear.
This work was granted by the French ANR project RAVAJ.