{
    "0": {
        "score": 0.0,
        "success": {},
        "failure": {
            "1": {
                "modification": "modify: Added a Test operator to validate the generated solution.",
                "score": 0.0
            }
        }
    },
    "1": {
        "score": 0.0,
        "success": {},
        "failure": {
            "2": {
                "modification": "(add a ScEnsemble operator to improve solution selection)",
                "score": 0.0
            }
        }
    }
}