{
  "scope": "Exhaustive finite-state check of a teaching model, not field equipment or collision freedom.",
  "assumptions": [
    "Atomic transitions",
    "A tick always occurs",
    "Displayed signals equal model outputs",
    "Two incompatible through movements only",
    "All detector input sequences allowed"
  ],
  "controllers": [
    {
      "mode": "conflict",
      "config": {
        "northGreen": 4,
        "eastGreen": 4,
        "yellow": 2,
        "clearance": 1
      },
      "reachableStates": 2,
      "inputTransitions": 8,
      "noConflictingGreens": false,
      "conflictTrace": [
        {
          "from": "STOP:1",
          "to": "BOTH:1",
          "input": {
            "north": false,
            "east": false
          }
        }
      ],
      "north": {
        "guaranteed": true,
        "maxTicksToGreen": 1,
        "witness": null
      },
      "east": {
        "guaranteed": true,
        "maxTicksToGreen": 1,
        "witness": null
      }
    },
    {
      "mode": "all-red",
      "config": {
        "northGreen": 4,
        "eastGreen": 4,
        "yellow": 2,
        "clearance": 1
      },
      "reachableStates": 1,
      "inputTransitions": 4,
      "noConflictingGreens": true,
      "conflictTrace": null,
      "north": {
        "guaranteed": false,
        "maxTicksToGreen": null,
        "witness": {
          "prefix": [],
          "cycle": [
            {
              "from": "STOP:1",
              "to": "STOP:1",
              "input": {
                "north": false,
                "east": false
              }
            }
          ]
        }
      },
      "east": {
        "guaranteed": false,
        "maxTicksToGreen": null,
        "witness": {
          "prefix": [],
          "cycle": [
            {
              "from": "STOP:1",
              "to": "STOP:1",
              "input": {
                "north": false,
                "east": false
              }
            }
          ]
        }
      }
    },
    {
      "mode": "priority",
      "config": {
        "northGreen": 4,
        "eastGreen": 4,
        "yellow": 2,
        "clearance": 1
      },
      "reachableStates": 14,
      "inputTransitions": 56,
      "noConflictingGreens": true,
      "conflictTrace": null,
      "north": {
        "guaranteed": true,
        "maxTicksToGreen": 10,
        "witness": null
      },
      "east": {
        "guaranteed": false,
        "maxTicksToGreen": null,
        "witness": {
          "prefix": [
            {
              "from": "N_GREEN:4",
              "to": "N_GREEN:3",
              "input": {
                "north": false,
                "east": false
              }
            },
            {
              "from": "N_GREEN:3",
              "to": "N_GREEN:2",
              "input": {
                "north": false,
                "east": false
              }
            },
            {
              "from": "N_GREEN:2",
              "to": "N_GREEN:1",
              "input": {
                "north": false,
                "east": false
              }
            }
          ],
          "cycle": [
            {
              "from": "N_GREEN:1",
              "to": "N_GREEN:1",
              "input": {
                "north": true,
                "east": false
              }
            }
          ]
        }
      }
    },
    {
      "mode": "cycle",
      "config": {
        "northGreen": 4,
        "eastGreen": 4,
        "yellow": 2,
        "clearance": 1
      },
      "reachableStates": 14,
      "inputTransitions": 56,
      "noConflictingGreens": true,
      "conflictTrace": null,
      "north": {
        "guaranteed": true,
        "maxTicksToGreen": 10,
        "witness": null
      },
      "east": {
        "guaranteed": true,
        "maxTicksToGreen": 10,
        "witness": null
      }
    }
  ]
}