Version 2.7.0 is available upstream. Please consider updating! It seems that version 2.7.0 is available upstream, while the latest version in the Gentoo tree is 2.5.2. You think this warning is false? Read more about it here.
OpenSMT2 is an SMT solver written in C++. It supports reading files in
SMT-LIB2 format and the theories QF_UF, QF_RDL, QF_IDL, QF_LRA, QF_LIA,
QF_UFLRA, QF_UFLIA and QF_AX. The system also provides an API; the
distribution includes a minimal example how to use the API.