The Actor model, introduced by Hewitt and Agha in the late 80s,
describes a concurrent communicating system as a set of autonomous
agents, with non uniform interfaces and communicating by the use of
labeled messages. The CAP process calculus, proposed by Colaço, is based
on this model and allows to describe non trivial realistic systems,
without the need of complex encodings. CAP is a higher-order calculus:
messages can carry actor behaviors. Multiple works address the analysis
of CAP properties, mainly by the use of inference-based type systems
using behavioral types and sub-typing. We propose here the use of
another approach, based on the abstract interpretation methodlogy to
address principal CAP issues such as the linearity of terms or the
absence of orphan messages.