expr mk_and(expr_vector args) {
vector<Z3_ast> array;
for (int i = 0; i < args.size(); i++)
array.push_back(args[i]);
return to_expr(args.ctx(), Z3_mk_and(args.ctx(), array.size(), &(array[0])));
}
inline expr MkAtMost(expr_vector vars, unsigned k) {
array<Z3_ast> _vars(vars.size());
for (unsigned i = 0; i < vars.size(); ++i) {
_vars[i] = vars[i];
}
expr r{ vars.ctx(), Z3_mk_atmost(vars.ctx(), vars.size(), _vars.ptr(), k) };
vars.check_error();
return r;
}