adding genuine flag to predicate_compile_quickcheck and prolog_quickcheck (cf. 5e46c225370e);
adjusting smart quickcheck compilation to new signature of exhaustive generators (cf. 1f5fc44254d7);
Arith = FOL +
classes arith < term
consts "0" :: "'a::arith" ("0")
"1" :: "'a::arith" ("1")
"+" :: "['a::arith,'a] => 'a" (infixl 60)
end