solidity/test/cmdlineTests/standard_model_checker_targets_underflow_chc/output.json

{
    "errors":
    [
        {
            "component": "general",
            "errorCode": "3944",
            "formattedMessage": "Warning: CHC: Underflow (resulting value less than 0) happens here.
Counterexample:
arr = []
a = 0x0
x = 0

Transaction trace:
test.constructor()
State: arr = []
test.f(0x0, 0)
 --> A:8:7:
  |
8 | \t\t\t\t\t\t--x;
  | \t\t\t\t\t\t^^^

",
            "message": "CHC: Underflow (resulting value less than 0) happens here.
Counterexample:
arr = []
a = 0x0
x = 0

Transaction trace:
test.constructor()
State: arr = []
test.f(0x0, 0)",
            "severity": "warning",
            "sourceLocation":
            {
                "end": 177,
                "file": "A",
                "start": 174
            },
            "type": "Warning"
        }
    ],
    "sources":
    {
        "A":
        {
            "id": 0
        }
    }
}