int main() {
    SmtEngine smt(&em);
    smt.setLogic("AUFLIRA"); // Set the logic

    Expr three = em.mkConst(Rational(3));
    Expr  four = em.mkConst(Rational(4));

    // make the list of bound variables in CVC4
    Expr bound_var = em.mkBoundVar("x_bound",  em.integerType());
    vector<Expr> bound_vars;
    bound_vars.push_back(bound_var);
    Expr bound_var_list = em.mkExpr(kind::BOUND_VAR_LIST, bound_vars);

    Expr declare = em.mkExpr(kind::EQUAL, bound_var, three); //x_bound =3

    Expr check = em.mkExpr(kind::EQUAL, bound_var, four); //x_bound=4

    //forall x_bound, x_bound=3, the constraint I want to declare as true
    Expr expr = em.mkExpr(kind::FORALL, bound_var_list, declare);

    smt.assertFormula(expr);
    smt.push();

    // expect to be INVALID
    // I want to check that given forall x_bound, x_bound = 3
    // then I ask CVC4: is it true that x_bound=4, or is it false?
    std::cout << "Quantifier " << smt.query(check) << std::endl;

    return 0;
}

Quantifier not defined.