VERIFICATION:- FAILED

Concrete playback
```
#[test]
fn kani_concrete_playback_harness
    let concrete_vals: Vec<Vec<u8>> = vec![
        // 1
        vec![1],
        // 101
        vec![101],
        // 0
        vec![0],
        // 102
        vec![102]
    ];
    kani::concrete_playback_run(concrete_vals, harness);
}
```