{"abstract":"tc is high whenever the counter sits at its terminal value, even with enable low.","category":"Digital logic simulation","checks":7,"contract":"Input [m, q0, ops]: ops per clock [load, value, en, up]. Before the edge tc = en==1 and ((up==1 and q==m-1) or (up==0 and q==0)). At the edge load==1 sets q = value mod m (load has priority and ignores en); else en==1 counts up or down modulo m. Return [q after edge, tc] per clock.","evaluation_group":"w2-digital-logic-simulation-updown-counter","failed_approach":"Qualifying with load instead of enable still asserts tc while disabled.","family":"w2-digital-logic-simulation-updown-counter-terminal-count-gating","id":"FA-89256","implementations":{"attempt":{"sha256":"4ac62407857bf0033a28e3267c88c9622a8644000fe5b566d0ba0f7c08f95bba","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\n\nN = 1\nobservations = []\ndef solve(*args):\n    m, q, ops = args\n    out = []\n    for load, v, en, up in ops:\n        tc = int(load == 0 and ((up == 1 and q == m - 1) or (up == 0 and q == 0)))\n        if load == 1:\n            q = v % m\n        elif en == 1:\n            q = (q + 1) % m if up == 1 else (q - 1) % m\n        out.append([q, tc])\n    return out\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\nfixtures = [[('count up through wrap', [6, 4, [[0, 0, 1, 1], [0, 0, 1, 1], [0, 0, 1, 1], [0, 0, 1, 1]]], [[5, 0], [0, 1], [1, 0], [2, 0]]), ('count down through zero', [6, 1, [[0, 0, 1, 0], [0, 0, 1, 0], [0, 0, 1, 0]]], [[0, 0], [5, 1], [4, 0]]), ('terminal count needs enable', [6, 5, [[0, 0, 0, 1], [0, 0, 1, 1], [0, 0, 0, 0]]], [[5, 0], [0, 1], [0, 0]]), ('load with enable low', [6, 0, [[1, 3, 0, 1], [0, 0, 1, 1]]], [[3, 0], [4, 0]]), ('load value reduced modulo', [6, 0, [[1, 8, 1, 1], [0, 0, 1, 0]]], [[2, 0], [1, 0]]), ('load while enabled does not count', [6, 2, [[1, 1, 1, 1], [0, 0, 1, 1]]], [[1, 0], [2, 0]]), ('down terminal count at zero', [6, 0, [[0, 0, 1, 0], [0, 0, 1, 1]]], [[5, 1], [0, 1]])], [('count up through wrap', [5, 3, [[0, 0, 1, 1], [0, 0, 1, 1], [0, 0, 1, 1], [0, 0, 1, 1]]], [[4, 0], [0, 1], [1, 0], [2, 0]]), ('count down through zero', [5, 1, [[0, 0, 1, 0], [0, 0, 1, 0], [0, 0, 1, 0]]], [[0, 0], [4, 1], [3, 0]]), ('terminal count needs enable', [5, 4, [[0, 0, 0, 1], [0, 0, 1, 1], [0, 0, 0, 0]]], [[4, 0], [0, 1], [0, 0]]), ('load with enable low', [5, 0, [[1, 3, 0, 1], [0, 0, 1, 1]]], [[3, 0], [4, 0]]), ('load value reduced modulo', [5, 0, [[1, 6, 1, 1], [0, 0, 1, 0]]], [[1, 0], [0, 0]]), ('load while enabled does not count', [5, 2, [[1, 1, 1, 1], [0, 0, 1, 1]]], [[1, 0], [2, 0]]), ('down terminal count at zero', [5, 0, [[0, 0, 1, 0], [0, 0, 1, 1], [0, 0, 1, 1]]], [[4, 1], [0, 1], [1, 0]])], [('count up through wrap', [6, 4, [[0, 0, 1, 1], [0, 0, 1, 1], [0, 0, 1, 1], [0, 0, 1, 1]]], [[5, 0], [0, 1], [1, 0], [2, 0]]), ('count down through zero', [6, 1, [[0, 0, 1, 0], [0, 0, 1, 0], [0, 0, 1, 0]]], [[0, 0], [5, 1], [4, 0]]), ('terminal count needs enable', [6, 5, [[0, 0, 0, 1], [0, 0, 1, 1], [0, 0, 0, 0]]], [[5, 0], [0, 1], [0, 0]]), ('load with enable low', [6, 0, [[1, 3, 0, 1], [0, 0, 1, 1]]], [[3, 0], [4, 0]]), ('load value reduced modulo', [6, 0, [[1, 8, 1, 1], [0, 0, 1, 0]]], [[2, 0], [1, 0]]), ('load while enabled does not count', [6, 2, [[1, 1, 1, 1], [0, 0, 1, 1]]], [[1, 0], [2, 0]]), ('down terminal count at zero', [6, 0, [[0, 0, 1, 0], [0, 0, 1, 1], [0, 0, 1, 1], [0, 0, 1, 1]]], [[5, 1], [0, 1], [1, 0], [2, 0]])], [('count up through wrap', [5, 3, [[0, 0, 1, 1], [0, 0, 1, 1], [0, 0, 1, 1], [0, 0, 1, 1]]], [[4, 0], [0, 1], [1, 0], [2, 0]]), ('count down through zero', [5, 1, [[0, 0, 1, 0], [0, 0, 1, 0], [0, 0, 1, 0]]], [[0, 0], [4, 1], [3, 0]]), ('terminal count needs enable', [5, 4, [[0, 0, 0, 1], [0, 0, 1, 1], [0, 0, 0, 0]]], [[4, 0], [0, 1], [0, 0]]), ('load with enable low', [5, 0, [[1, 3, 0, 1], [0, 0, 1, 1]]], [[3, 0], [4, 0]]), ('load value reduced modulo', [5, 0, [[1, 6, 1, 1], [0, 0, 1, 0]]], [[1, 0], [0, 0]]), ('load while enabled does not count', [5, 2, [[1, 1, 1, 1], [0, 0, 1, 1]]], [[1, 0], [2, 0]]), ('down terminal count at zero', [5, 0, [[0, 0, 1, 0], [0, 0, 1, 1], [0, 0, 1, 1], [0, 0, 1, 1], [0, 0, 1, 1]]], [[4, 1], [0, 1], [1, 0], [2, 0], [3, 0]])], [('count up through wrap', [6, 4, [[0, 0, 1, 1], [0, 0, 1, 1], [0, 0, 1, 1], [0, 0, 1, 1]]], [[5, 0], [0, 1], [1, 0], [2, 0]]), ('count down through zero', [6, 1, [[0, 0, 1, 0], [0, 0, 1, 0], [0, 0, 1, 0]]], [[0, 0], [5, 1], [4, 0]]), ('terminal count needs enable', [6, 5, [[0, 0, 0, 1], [0, 0, 1, 1], [0, 0, 0, 0]]], [[5, 0], [0, 1], [0, 0]]), ('load with enable low', [6, 0, [[1, 3, 0, 1], [0, 0, 1, 1]]], [[3, 0], [4, 0]]), ('load value reduced modulo', [6, 0, [[1, 8, 1, 1], [0, 0, 1, 0]]], [[2, 0], [1, 0]]), ('load while enabled does not count', [6, 2, [[1, 1, 1, 1], [0, 0, 1, 1]]], [[1, 0], [2, 0]]), ('down terminal count at zero', [6, 0, [[0, 0, 1, 0], [0, 0, 1, 1], [0, 0, 1, 1], [0, 0, 1, 1], [0, 0, 1, 1], [0, 0, 1, 1]]], [[5, 1], [0, 1], [1, 0], [2, 0], [3, 0], [4, 0]])]]\nfor label, args, expected in fixtures[N-1]:\n    check(label, solve(*args), expected)\nprint(json.dumps({\"observations\": observations, \"passed\": all(x[\"passed\"] for x in observations)}, ensure_ascii=False))\nraise SystemExit(0 if all(x[\"passed\"] for x in observations) else 1)\n"},"broken":{"sha256":"bda296bd34ede02dee467d0d4409eb32ea5d8e0cf5f06b7c37ee426a1e72d57b","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\n\nN = 1\nobservations = []\ndef solve(*args):\n    m, q, ops = args\n    out = []\n    for load, v, en, up in ops:\n        tc = int(True and ((up == 1 and q == m - 1) or (up == 0 and q == 0)))\n        if load == 1:\n            q = v % m\n        elif en == 1:\n            q = (q + 1) % m if up == 1 else (q - 1) % m\n        out.append([q, tc])\n    return out\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\nfixtures = [[('count up through wrap', [6, 4, [[0, 0, 1, 1], [0, 0, 1, 1], [0, 0, 1, 1], [0, 0, 1, 1]]], [[5, 0], [0, 1], [1, 0], [2, 0]]), ('count down through zero', [6, 1, [[0, 0, 1, 0], [0, 0, 1, 0], [0, 0, 1, 0]]], [[0, 0], [5, 1], [4, 0]]), ('terminal count needs enable', [6, 5, [[0, 0, 0, 1], [0, 0, 1, 1], [0, 0, 0, 0]]], [[5, 0], [0, 1], [0, 0]]), ('load with enable low', [6, 0, [[1, 3, 0, 1], [0, 0, 1, 1]]], [[3, 0], [4, 0]]), ('load value reduced modulo', [6, 0, [[1, 8, 1, 1], [0, 0, 1, 0]]], [[2, 0], [1, 0]]), ('load while enabled does not count', [6, 2, [[1, 1, 1, 1], [0, 0, 1, 1]]], [[1, 0], [2, 0]]), ('down terminal count at zero', [6, 0, [[0, 0, 1, 0], [0, 0, 1, 1]]], [[5, 1], [0, 1]])], [('count up through wrap', [5, 3, [[0, 0, 1, 1], [0, 0, 1, 1], [0, 0, 1, 1], [0, 0, 1, 1]]], [[4, 0], [0, 1], [1, 0], [2, 0]]), ('count down through zero', [5, 1, [[0, 0, 1, 0], [0, 0, 1, 0], [0, 0, 1, 0]]], [[0, 0], [4, 1], [3, 0]]), ('terminal count needs enable', [5, 4, [[0, 0, 0, 1], [0, 0, 1, 1], [0, 0, 0, 0]]], [[4, 0], [0, 1], [0, 0]]), ('load with enable low', [5, 0, [[1, 3, 0, 1], [0, 0, 1, 1]]], [[3, 0], [4, 0]]), ('load value reduced modulo', [5, 0, [[1, 6, 1, 1], [0, 0, 1, 0]]], [[1, 0], [0, 0]]), ('load while enabled does not count', [5, 2, [[1, 1, 1, 1], [0, 0, 1, 1]]], [[1, 0], [2, 0]]), ('down terminal count at zero', [5, 0, [[0, 0, 1, 0], [0, 0, 1, 1], [0, 0, 1, 1]]], [[4, 1], [0, 1], [1, 0]])], [('count up through wrap', [6, 4, [[0, 0, 1, 1], [0, 0, 1, 1], [0, 0, 1, 1], [0, 0, 1, 1]]], [[5, 0], [0, 1], [1, 0], [2, 0]]), ('count down through zero', [6, 1, [[0, 0, 1, 0], [0, 0, 1, 0], [0, 0, 1, 0]]], [[0, 0], [5, 1], [4, 0]]), ('terminal count needs enable', [6, 5, [[0, 0, 0, 1], [0, 0, 1, 1], [0, 0, 0, 0]]], [[5, 0], [0, 1], [0, 0]]), ('load with enable low', [6, 0, [[1, 3, 0, 1], [0, 0, 1, 1]]], [[3, 0], [4, 0]]), ('load value reduced modulo', [6, 0, [[1, 8, 1, 1], [0, 0, 1, 0]]], [[2, 0], [1, 0]]), ('load while enabled does not count', [6, 2, [[1, 1, 1, 1], [0, 0, 1, 1]]], [[1, 0], [2, 0]]), ('down terminal count at zero', [6, 0, [[0, 0, 1, 0], [0, 0, 1, 1], [0, 0, 1, 1], [0, 0, 1, 1]]], [[5, 1], [0, 1], [1, 0], [2, 0]])], [('count up through wrap', [5, 3, [[0, 0, 1, 1], [0, 0, 1, 1], [0, 0, 1, 1], [0, 0, 1, 1]]], [[4, 0], [0, 1], [1, 0], [2, 0]]), ('count down through zero', [5, 1, [[0, 0, 1, 0], [0, 0, 1, 0], [0, 0, 1, 0]]], [[0, 0], [4, 1], [3, 0]]), ('terminal count needs enable', [5, 4, [[0, 0, 0, 1], [0, 0, 1, 1], [0, 0, 0, 0]]], [[4, 0], [0, 1], [0, 0]]), ('load with enable low', [5, 0, [[1, 3, 0, 1], [0, 0, 1, 1]]], [[3, 0], [4, 0]]), ('load value reduced modulo', [5, 0, [[1, 6, 1, 1], [0, 0, 1, 0]]], [[1, 0], [0, 0]]), ('load while enabled does not count', [5, 2, [[1, 1, 1, 1], [0, 0, 1, 1]]], [[1, 0], [2, 0]]), ('down terminal count at zero', [5, 0, [[0, 0, 1, 0], [0, 0, 1, 1], [0, 0, 1, 1], [0, 0, 1, 1], [0, 0, 1, 1]]], [[4, 1], [0, 1], [1, 0], [2, 0], [3, 0]])], [('count up through wrap', [6, 4, [[0, 0, 1, 1], [0, 0, 1, 1], [0, 0, 1, 1], [0, 0, 1, 1]]], [[5, 0], [0, 1], [1, 0], [2, 0]]), ('count down through zero', [6, 1, [[0, 0, 1, 0], [0, 0, 1, 0], [0, 0, 1, 0]]], [[0, 0], [5, 1], [4, 0]]), ('terminal count needs enable', [6, 5, [[0, 0, 0, 1], [0, 0, 1, 1], [0, 0, 0, 0]]], [[5, 0], [0, 1], [0, 0]]), ('load with enable low', [6, 0, [[1, 3, 0, 1], [0, 0, 1, 1]]], [[3, 0], [4, 0]]), ('load value reduced modulo', [6, 0, [[1, 8, 1, 1], [0, 0, 1, 0]]], [[2, 0], [1, 0]]), ('load while enabled does not count', [6, 2, [[1, 1, 1, 1], [0, 0, 1, 1]]], [[1, 0], [2, 0]]), ('down terminal count at zero', [6, 0, [[0, 0, 1, 0], [0, 0, 1, 1], [0, 0, 1, 1], [0, 0, 1, 1], [0, 0, 1, 1], [0, 0, 1, 1]]], [[5, 1], [0, 1], [1, 0], [2, 0], [3, 0], [4, 0]])]]\nfor label, args, expected in fixtures[N-1]:\n    check(label, solve(*args), expected)\nprint(json.dumps({\"observations\": observations, \"passed\": all(x[\"passed\"] for x in observations)}, ensure_ascii=False))\nraise SystemExit(0 if all(x[\"passed\"] for x in observations) else 1)\n"},"fixed":{"sha256":"66dfcb15296c2eb648dcde061c7fb0bf64f01adc8e5943e662de376064341050","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\n\nN = 1\nobservations = []\ndef solve(*args):\n    m, q, ops = args\n    out = []\n    for load, v, en, up in ops:\n        tc = int(en == 1 and ((up == 1 and q == m - 1) or (up == 0 and q == 0)))\n        if load == 1:\n            q = v % m\n        elif en == 1:\n            q = (q + 1) % m if up == 1 else (q - 1) % m\n        out.append([q, tc])\n    return out\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\nfixtures = [[('count up through wrap', [6, 4, [[0, 0, 1, 1], [0, 0, 1, 1], [0, 0, 1, 1], [0, 0, 1, 1]]], [[5, 0], [0, 1], [1, 0], [2, 0]]), ('count down through zero', [6, 1, [[0, 0, 1, 0], [0, 0, 1, 0], [0, 0, 1, 0]]], [[0, 0], [5, 1], [4, 0]]), ('terminal count needs enable', [6, 5, [[0, 0, 0, 1], [0, 0, 1, 1], [0, 0, 0, 0]]], [[5, 0], [0, 1], [0, 0]]), ('load with enable low', [6, 0, [[1, 3, 0, 1], [0, 0, 1, 1]]], [[3, 0], [4, 0]]), ('load value reduced modulo', [6, 0, [[1, 8, 1, 1], [0, 0, 1, 0]]], [[2, 0], [1, 0]]), ('load while enabled does not count', [6, 2, [[1, 1, 1, 1], [0, 0, 1, 1]]], [[1, 0], [2, 0]]), ('down terminal count at zero', [6, 0, [[0, 0, 1, 0], [0, 0, 1, 1]]], [[5, 1], [0, 1]])], [('count up through wrap', [5, 3, [[0, 0, 1, 1], [0, 0, 1, 1], [0, 0, 1, 1], [0, 0, 1, 1]]], [[4, 0], [0, 1], [1, 0], [2, 0]]), ('count down through zero', [5, 1, [[0, 0, 1, 0], [0, 0, 1, 0], [0, 0, 1, 0]]], [[0, 0], [4, 1], [3, 0]]), ('terminal count needs enable', [5, 4, [[0, 0, 0, 1], [0, 0, 1, 1], [0, 0, 0, 0]]], [[4, 0], [0, 1], [0, 0]]), ('load with enable low', [5, 0, [[1, 3, 0, 1], [0, 0, 1, 1]]], [[3, 0], [4, 0]]), ('load value reduced modulo', [5, 0, [[1, 6, 1, 1], [0, 0, 1, 0]]], [[1, 0], [0, 0]]), ('load while enabled does not count', [5, 2, [[1, 1, 1, 1], [0, 0, 1, 1]]], [[1, 0], [2, 0]]), ('down terminal count at zero', [5, 0, [[0, 0, 1, 0], [0, 0, 1, 1], [0, 0, 1, 1]]], [[4, 1], [0, 1], [1, 0]])], [('count up through wrap', [6, 4, [[0, 0, 1, 1], [0, 0, 1, 1], [0, 0, 1, 1], [0, 0, 1, 1]]], [[5, 0], [0, 1], [1, 0], [2, 0]]), ('count down through zero', [6, 1, [[0, 0, 1, 0], [0, 0, 1, 0], [0, 0, 1, 0]]], [[0, 0], [5, 1], [4, 0]]), ('terminal count needs enable', [6, 5, [[0, 0, 0, 1], [0, 0, 1, 1], [0, 0, 0, 0]]], [[5, 0], [0, 1], [0, 0]]), ('load with enable low', [6, 0, [[1, 3, 0, 1], [0, 0, 1, 1]]], [[3, 0], [4, 0]]), ('load value reduced modulo', [6, 0, [[1, 8, 1, 1], [0, 0, 1, 0]]], [[2, 0], [1, 0]]), ('load while enabled does not count', [6, 2, [[1, 1, 1, 1], [0, 0, 1, 1]]], [[1, 0], [2, 0]]), ('down terminal count at zero', [6, 0, [[0, 0, 1, 0], [0, 0, 1, 1], [0, 0, 1, 1], [0, 0, 1, 1]]], [[5, 1], [0, 1], [1, 0], [2, 0]])], [('count up through wrap', [5, 3, [[0, 0, 1, 1], [0, 0, 1, 1], [0, 0, 1, 1], [0, 0, 1, 1]]], [[4, 0], [0, 1], [1, 0], [2, 0]]), ('count down through zero', [5, 1, [[0, 0, 1, 0], [0, 0, 1, 0], [0, 0, 1, 0]]], [[0, 0], [4, 1], [3, 0]]), ('terminal count needs enable', [5, 4, [[0, 0, 0, 1], [0, 0, 1, 1], [0, 0, 0, 0]]], [[4, 0], [0, 1], [0, 0]]), ('load with enable low', [5, 0, [[1, 3, 0, 1], [0, 0, 1, 1]]], [[3, 0], [4, 0]]), ('load value reduced modulo', [5, 0, [[1, 6, 1, 1], [0, 0, 1, 0]]], [[1, 0], [0, 0]]), ('load while enabled does not count', [5, 2, [[1, 1, 1, 1], [0, 0, 1, 1]]], [[1, 0], [2, 0]]), ('down terminal count at zero', [5, 0, [[0, 0, 1, 0], [0, 0, 1, 1], [0, 0, 1, 1], [0, 0, 1, 1], [0, 0, 1, 1]]], [[4, 1], [0, 1], [1, 0], [2, 0], [3, 0]])], [('count up through wrap', [6, 4, [[0, 0, 1, 1], [0, 0, 1, 1], [0, 0, 1, 1], [0, 0, 1, 1]]], [[5, 0], [0, 1], [1, 0], [2, 0]]), ('count down through zero', [6, 1, [[0, 0, 1, 0], [0, 0, 1, 0], [0, 0, 1, 0]]], [[0, 0], [5, 1], [4, 0]]), ('terminal count needs enable', [6, 5, [[0, 0, 0, 1], [0, 0, 1, 1], [0, 0, 0, 0]]], [[5, 0], [0, 1], [0, 0]]), ('load with enable low', [6, 0, [[1, 3, 0, 1], [0, 0, 1, 1]]], [[3, 0], [4, 0]]), ('load value reduced modulo', [6, 0, [[1, 8, 1, 1], [0, 0, 1, 0]]], [[2, 0], [1, 0]]), ('load while enabled does not count', [6, 2, [[1, 1, 1, 1], [0, 0, 1, 1]]], [[1, 0], [2, 0]]), ('down terminal count at zero', [6, 0, [[0, 0, 1, 0], [0, 0, 1, 1], [0, 0, 1, 1], [0, 0, 1, 1], [0, 0, 1, 1], [0, 0, 1, 1]]], [[5, 1], [0, 1], [1, 0], [2, 0], [3, 0], [4, 0]])]]\nfor label, args, expected in fixtures[N-1]:\n    check(label, solve(*args), expected)\nprint(json.dumps({\"observations\": observations, \"passed\": all(x[\"passed\"] for x in observations)}, ensure_ascii=False))\nraise SystemExit(0 if all(x[\"passed\"] for x in observations) else 1)\n"}},"limitations":"A deterministic bounded teaching model of one simulator rule set; the contract is stipulated and is not a claim of conformance to any HDL standard or commercial simulator. This reproducer isolates one failure mechanism. Results cover the supplied fixtures. Variants within a family share a test contract and should remain grouped when constructing evaluation splits. Related mechanisms with a shared evaluation_group must also remain together; these controlled models are not independent production incidents.","method":"Deterministic executable model with adversarial boundary fixtures.","provenance":{"created_by":"Failure Map","dependencies":"Python standard library","family":"w2-digital-logic-simulation-updown-counter-terminal-count-gating","generated_at":"2026-09-29T14:51:15.569870+00:00","license":"CC0-1.0","python":"3.12.14","seed":1,"split":"open-access"},"relevance":"Counters are the most common sequential primitive; wrap, load priority and terminal-count gating are recurring simulation-model bugs.","repair":"Qualify tc with en==1.","root_cause":"The terminal-count decode is not qualified by the count enable.","sha256":"31f23330c6dc93cd45da61da1f0694671fe6ce8d5a0dc1e7aedcfa53b06db6a0","title":"Terminal count asserted while the counter is disabled · case 01","variant":1,"variant_policy":"Five numbered records share a model and may reuse boundary fixtures.","verification":{"attempt":{"elapsed_ms":41.31,"exit_code":1,"observations":[{"actual":[[5,0],[0,1],[1,0],[2,0]],"check":"count up through wrap","expected":[[5,0],[0,1],[1,0],[2,0]],"passed":true},{"actual":[[0,0],[5,1],[4,0]],"check":"count down through zero","expected":[[0,0],[5,1],[4,0]],"passed":true},{"actual":[[5,1],[0,1],[0,1]],"check":"terminal count needs enable","expected":[[5,0],[0,1],[0,0]],"passed":false},{"actual":[[3,0],[4,0]],"check":"load with enable low","expected":[[3,0],[4,0]],"passed":true},{"actual":[[2,0],[1,0]],"check":"load value reduced modulo","expected":[[2,0],[1,0]],"passed":true},{"actual":[[1,0],[2,0]],"check":"load while enabled does not count","expected":[[1,0],[2,0]],"passed":true},{"actual":[[5,1],[0,1]],"check":"down terminal count at zero","expected":[[5,1],[0,1]],"passed":true}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"count up through wrap\", \"actual\": [[5, 0], [0, 1], [1, 0], [2, 0]], \"expected\": [[5, 0], [0, 1], [1, 0], [2, 0]], \"passed\": true}, {\"check\": \"count down through zero\", \"actual\": [[0, 0], [5, 1], [4, 0]], \"expected\": [[0, 0], [5, 1], [4, 0]], \"passed\": true}, {\"check\": \"terminal count needs enable\", \"actual\": [[5, 1], [0, 1], [0, 1]], \"expected\": [[5, 0], [0, 1], [0, 0]], \"passed\": false}, {\"check\": \"load with enable low\", \"actual\": [[3, 0], [4, 0]], \"expected\": [[3, 0], [4, 0]], \"passed\": true}, {\"check\": \"load value reduced modulo\", \"actual\": [[2, 0], [1, 0]], \"expected\": [[2, 0], [1, 0]], \"passed\": true}, {\"check\": \"load while enabled does not count\", \"actual\": [[1, 0], [2, 0]], \"expected\": [[1, 0], [2, 0]], \"passed\": true}, {\"check\": \"down terminal count at zero\", \"actual\": [[5, 1], [0, 1]], \"expected\": [[5, 1], [0, 1]], \"passed\": true}], \"passed\": false}\n"},"broken":{"elapsed_ms":38.812,"exit_code":1,"observations":[{"actual":[[5,0],[0,1],[1,0],[2,0]],"check":"count up through 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