source: CIVL/examples/languageFeatures/sumExpression.cvl

$input int N;
$assume(N > 0 && N <= 10);
$input int a[N];

int main() {
    int sum = 0;
    for (int i = 0; i < N; i++) {
        sum += a[i] + 1;
    }
    $assert(sum == $sum(int t : 0 .. N-1) a[t] + 1);
    return 0;
}