smtv2: blacklist "concat" used by CVC4
smtv2: blacklist "concat" used by CVC4

we really, really should implement blacklists in drivers

jpdeplaix/why3,douglas-larocca/why3,jpdeplaix/why3,ssaavedra/why3,ssaavedra/why3,douglas-larocca/why3,jpdeplaix/why3,douglas-larocca/why3,ssaavedra/why3