{"abstract":"Accelerating or decelerating frame rates distort the trajectory in opposite directions.","category":"Physics integrator stability","checks":8,"contract":"solve(x0, v0, w2, g, dts): position Verlet with variable steps, acceleration -w2*x+g. First step is Taylor x1=x0+v0*h0+0.5*a(x0)*h0^2; then x_{n+1}=x_n+(x_n-x_{n-1})*(h_n/h_{n-1})+a(x_n)*h_n*(h_n+h_{n-1})/2. Velocity estimate is (x_n-x_{n-1})/h_last. Empty dts returns the initial state. Return [x, v] rounded.","evaluation_group":"w2-physics_integrator_stability-time-corrected-verlet","failed_approach":"Using the first step as the permanent previous step fails after several changes.","family":"w2-physics_integrator_stability-time-corrected-verlet-step-pairing","id":"FA-87141","implementations":{"attempt":{"sha256":"d47583ccbd1d87f52bce2ea46672771c2e6c1535c8b84493481769caebe52f3b","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\nimport math\nN = 1\nobservations = []\ndef solve(x0, v0, w2, g, dts):\n    def acc(p):\n        return -w2 * p + g\n    if not dts:\n        return [round(x0, 6), round(v0, 6)]\n    prev = x0\n    x = x0 + v0 * dts[0] + 0.5 * acc(x0) * dts[0] * dts[0]\n    for i in range(1, len(dts)):\n        h, hp = dts[i], dts[0]\n        nxt = x + (x - prev) * (h / hp) + acc(x) * h * (h + hp) / 2\n        prev, x = x, nxt\n    v = (x - prev) / dts[-1]\n    return [round(x, 6), round(v, 6)]\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\nfixtures = [[[[0.159, 1.403, 12.469, 0.0, [0.01, 0.02, 0.05]], [0.263816, 1.273396]], [[0.78, -0.691, 5.2, -9.81, [0.01, 0.05, 0.05]], [0.621082, -1.85117]], [[-1.619, -0.338, 11.211, 0.0, [0.03, 0.01, 0.02, 0.01]], [-1.598199, 0.839977]], [[1.835, -1.641, 6.597, 2.0, [0.02, 0.02]], [1.761368, -1.939568]], [[1.699, 1.89, 11.648, 2.0, [0.01, 0.01, 0.01]], [1.747613, 1.439167]], [[-1.409, 0.693, 7.348, -9.81, [0.02, 0.02, 0.05, 0.05, 0.05, 0.01]], [-1.266157, 0.69937]], [[-1.118, 1.653, 18.431, 0.0, [0.03, 0.03]], [-0.982706, 2.547717]], [[1.52, -0.79, 13.208, 2.0, [0.03, 0.03, 0.02, 0.02, 0.05, 0.05]], [1.02811, -3.599677]]], [[[1.821, 1.198, 3.771, 0.0, [0.02, 0.01, 0.05, 0.02, 0.01]], [1.910483, 0.457456]], [[0.644, -0.151, 13.871, -9.81, [0.02, 0.02, 0.01, 0.01, 0.05, 0.02, 0.03]], [0.387894, -2.717601]], [[-1.926, 1.549, 6.213, -9.81, [0.01, 0.03, 0.01, 0.02, 0.02]], [-1.778987, 1.690133]], [[-0.485, 1.456, 18.965, 2.0, [0.01, 0.03, 0.05, 0.05, 0.02, 0.02]], [-0.07504, 2.805631]], [[1.693, 1.184, 10.982, -9.81, [0.02, 0.03, 0.05, 0.05]], [1.550068, -2.368135]], [[0.454, 0.048, 11.925, 0.0, [0.01, 0.01, 0.01]], [0.453003, -0.087359]], [[0.426, -0.985, 9.249, -9.81, [0.02, 0.05, 0.05]], [0.211891, -2.236693]], [[-1.855, 0.692, 12.133, 2.0, [0.02, 0.01, 0.01, 0.03]], [-1.747187, 2.021157]]], [[[1.462, -1.373, 3.135, 0.0, [0.05, 0.02, 0.02, 0.01, 0.02, 0.05, 0.03]], [1.102151, -2.133217]], [[-1.478, -0.428, 14.024, 2.0, [0.01, 0.02, 0.01]], [-1.476913, 0.36867]], [[1.606, 1.967, 9.66, 0.0, [0.05, 0.03, 0.01, 0.02, 0.03, 0.05, 0.01]], [1.674706, -1.223548]], [[-0.31, -1.257, 5.955, 0.0, [0.05, 0.03, 0.05]], [-0.455535, -1.0263]], [[-0.686, 1.111, 17.91, -9.81, [0.05, 0.03, 0.03, 0.03]], [-0.5152, 1.255652]], [[0.106, -1.937, 2.608, 0.0, [0.03, 0.01, 0.03, 0.05, 0.01, 0.05, 0.05, 0.02]], [-0.374085, -1.858207]], [[0.68, 1.896, 12.013, -9.81, [0.03, 0.03, 0.03]], [0.775896, 0.500859]], [[0.152, -1.091, 14.043, 0.0, [0.01, 0.02, 0.01, 0.02, 0.05, 0.01]], [0.009941, -1.229064]]], [[[-1.698, 0.325, 6.546, -9.81, [0.02, 0.02]], [-1.683974, 0.363268]], [[0.382, 0.792, 11.215, 0.0, [0.05, 0.01, 0.02, 0.05, 0.05, 0.03, 0.05, 0.03]], [0.411226, -0.538349]], [[-0.101, 1.196, 2.452, -9.81, [0.03, 0.02, 0.01, 0.03, 0.03, 0.02, 0.03, 0.01, 0.01]], [-0.048386, -0.598008]], [[-0.101, -1.02, 19.226, 2.0, [0.05, 0.01]], [-0.154839, -0.776626]], [[1.286, 1.196, 2.402, 0.0, [0.05, 0.05, 0.02, 0.01, 0.05, 0.05, 0.05, 0.03, 0.05]], [1.499807, 0.049865]], [[1.484, 1.78, 2.899, 2.0, [0.01, 0.02, 0.05, 0.01, 0.03]], [1.679732, 1.511762]], [[1.406, -0.862, 9.145, 0.0, [0.03, 0.01, 0.01, 0.03, 0.01, 0.01]], [1.257218, -2.031082]], [[-0.434, -1.688, 15.899, 0.0, [0.03, 0.05, 0.01, 0.02]], [-0.573341, -0.885589]]], [[[-0.841, -0.714, 0.875, 2.0, [0.05, 0.02, 0.02, 0.01, 0.01, 0.02, 0.02, 0.01]], [-0.919878, -0.283965]], [[-1.17, -1.869, 6.983, 2.0, [0.02, 0.02, 0.01, 0.01, 0.01, 0.03]], [-1.304253, -0.965785]], [[-0.421, -1.461, 6.131, 2.0, [0.02, 0.01, 0.03, 0.05, 0.01, 0.05]], [-0.597191, -0.719646]], [[0.363, 0.71, 3.317, 0.0, [0.01, 0.02]], [0.383751, 0.685568]], [[1.217, -0.953, 5.249, -9.81, [0.02, 0.01]], [1.181138, -1.356195]], [[1.94, 0.689, 18.476, 0.0, [0.05, 0.01, 0.03, 0.01, 0.05, 0.02, 0.03, 0.02, 0.02]], [1.133627, -6.57541]], [[1.097, 0.642, 16.162, 2.0, [0.01, 0.03]], [1.110042, 0.246936]], [[-1.434, -0.348, 10.741, -9.81, [0.03, 0.03, 0.03, 0.01, 0.05, 0.03, 0.03, 0.03, 0.01, 0.01]], [-1.336072, 1.031162]]]]\nfor i, (args, expected) in enumerate(fixtures[N-1]):\n    check(\"case %d\" % i, 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":"2675a869d65db3814cbebb33bbc6545fc8025e586ecf3c0081236dedb9acaf7f","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\nimport math\nN = 1\nobservations = []\ndef solve(x0, v0, w2, g, dts):\n    def acc(p):\n        return -w2 * p + g\n    if not dts:\n        return [round(x0, 6), round(v0, 6)]\n    prev = x0\n    x = x0 + v0 * dts[0] + 0.5 * acc(x0) * dts[0] * dts[0]\n    for i in range(1, len(dts)):\n        h, hp = dts[i - 1], dts[i]\n        nxt = x + (x - prev) * (h / hp) + acc(x) * h * (h + hp) / 2\n        prev, x = x, nxt\n    v = (x - prev) / dts[-1]\n    return [round(x, 6), round(v, 6)]\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\nfixtures = [[[[0.159, 1.403, 12.469, 0.0, [0.01, 0.02, 0.05]], [0.263816, 1.273396]], [[0.78, -0.691, 5.2, -9.81, [0.01, 0.05, 0.05]], [0.621082, -1.85117]], [[-1.619, -0.338, 11.211, 0.0, [0.03, 0.01, 0.02, 0.01]], [-1.598199, 0.839977]], [[1.835, -1.641, 6.597, 2.0, [0.02, 0.02]], [1.761368, -1.939568]], [[1.699, 1.89, 11.648, 2.0, [0.01, 0.01, 0.01]], [1.747613, 1.439167]], [[-1.409, 0.693, 7.348, -9.81, [0.02, 0.02, 0.05, 0.05, 0.05, 0.01]], [-1.266157, 0.69937]], [[-1.118, 1.653, 18.431, 0.0, [0.03, 0.03]], [-0.982706, 2.547717]], [[1.52, -0.79, 13.208, 2.0, [0.03, 0.03, 0.02, 0.02, 0.05, 0.05]], [1.02811, -3.599677]]], [[[1.821, 1.198, 3.771, 0.0, [0.02, 0.01, 0.05, 0.02, 0.01]], [1.910483, 0.457456]], [[0.644, -0.151, 13.871, -9.81, [0.02, 0.02, 0.01, 0.01, 0.05, 0.02, 0.03]], [0.387894, -2.717601]], [[-1.926, 1.549, 6.213, -9.81, [0.01, 0.03, 0.01, 0.02, 0.02]], [-1.778987, 1.690133]], [[-0.485, 1.456, 18.965, 2.0, [0.01, 0.03, 0.05, 0.05, 0.02, 0.02]], [-0.07504, 2.805631]], [[1.693, 1.184, 10.982, -9.81, [0.02, 0.03, 0.05, 0.05]], [1.550068, -2.368135]], [[0.454, 0.048, 11.925, 0.0, [0.01, 0.01, 0.01]], [0.453003, -0.087359]], [[0.426, -0.985, 9.249, -9.81, [0.02, 0.05, 0.05]], [0.211891, -2.236693]], [[-1.855, 0.692, 12.133, 2.0, [0.02, 0.01, 0.01, 0.03]], [-1.747187, 2.021157]]], [[[1.462, -1.373, 3.135, 0.0, [0.05, 0.02, 0.02, 0.01, 0.02, 0.05, 0.03]], [1.102151, -2.133217]], [[-1.478, -0.428, 14.024, 2.0, [0.01, 0.02, 0.01]], [-1.476913, 0.36867]], [[1.606, 1.967, 9.66, 0.0, [0.05, 0.03, 0.01, 0.02, 0.03, 0.05, 0.01]], [1.674706, -1.223548]], [[-0.31, -1.257, 5.955, 0.0, [0.05, 0.03, 0.05]], [-0.455535, -1.0263]], [[-0.686, 1.111, 17.91, -9.81, [0.05, 0.03, 0.03, 0.03]], [-0.5152, 1.255652]], [[0.106, -1.937, 2.608, 0.0, [0.03, 0.01, 0.03, 0.05, 0.01, 0.05, 0.05, 0.02]], [-0.374085, -1.858207]], [[0.68, 1.896, 12.013, -9.81, [0.03, 0.03, 0.03]], [0.775896, 0.500859]], [[0.152, -1.091, 14.043, 0.0, [0.01, 0.02, 0.01, 0.02, 0.05, 0.01]], [0.009941, -1.229064]]], [[[-1.698, 0.325, 6.546, -9.81, [0.02, 0.02]], [-1.683974, 0.363268]], [[0.382, 0.792, 11.215, 0.0, [0.05, 0.01, 0.02, 0.05, 0.05, 0.03, 0.05, 0.03]], [0.411226, -0.538349]], [[-0.101, 1.196, 2.452, -9.81, [0.03, 0.02, 0.01, 0.03, 0.03, 0.02, 0.03, 0.01, 0.01]], [-0.048386, -0.598008]], [[-0.101, -1.02, 19.226, 2.0, [0.05, 0.01]], [-0.154839, -0.776626]], [[1.286, 1.196, 2.402, 0.0, [0.05, 0.05, 0.02, 0.01, 0.05, 0.05, 0.05, 0.03, 0.05]], [1.499807, 0.049865]], [[1.484, 1.78, 2.899, 2.0, [0.01, 0.02, 0.05, 0.01, 0.03]], [1.679732, 1.511762]], [[1.406, -0.862, 9.145, 0.0, [0.03, 0.01, 0.01, 0.03, 0.01, 0.01]], [1.257218, -2.031082]], [[-0.434, -1.688, 15.899, 0.0, [0.03, 0.05, 0.01, 0.02]], [-0.573341, -0.885589]]], [[[-0.841, -0.714, 0.875, 2.0, [0.05, 0.02, 0.02, 0.01, 0.01, 0.02, 0.02, 0.01]], [-0.919878, -0.283965]], [[-1.17, -1.869, 6.983, 2.0, [0.02, 0.02, 0.01, 0.01, 0.01, 0.03]], [-1.304253, -0.965785]], [[-0.421, -1.461, 6.131, 2.0, [0.02, 0.01, 0.03, 0.05, 0.01, 0.05]], [-0.597191, -0.719646]], [[0.363, 0.71, 3.317, 0.0, [0.01, 0.02]], [0.383751, 0.685568]], [[1.217, -0.953, 5.249, -9.81, [0.02, 0.01]], [1.181138, -1.356195]], [[1.94, 0.689, 18.476, 0.0, [0.05, 0.01, 0.03, 0.01, 0.05, 0.02, 0.03, 0.02, 0.02]], [1.133627, -6.57541]], [[1.097, 0.642, 16.162, 2.0, [0.01, 0.03]], [1.110042, 0.246936]], [[-1.434, -0.348, 10.741, -9.81, [0.03, 0.03, 0.03, 0.01, 0.05, 0.03, 0.03, 0.03, 0.01, 0.01]], [-1.336072, 1.031162]]]]\nfor i, (args, expected) in enumerate(fixtures[N-1]):\n    check(\"case %d\" % i, 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":"7bcd2586e5b1f9442b5f074d07072332dafbef201ea1b471eca080ee68a41776","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\nimport math\nN = 1\nobservations = []\ndef solve(x0, v0, w2, g, dts):\n    def acc(p):\n        return -w2 * p + g\n    if not dts:\n        return [round(x0, 6), round(v0, 6)]\n    prev = x0\n    x = x0 + v0 * dts[0] + 0.5 * acc(x0) * dts[0] * dts[0]\n    for i in range(1, len(dts)):\n        h, hp = dts[i], dts[i - 1]\n        nxt = x + (x - prev) * (h / hp) + acc(x) * h * (h + hp) / 2\n        prev, x = x, nxt\n    v = (x - prev) / dts[-1]\n    return [round(x, 6), round(v, 6)]\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\nfixtures = [[[[0.159, 1.403, 12.469, 0.0, [0.01, 0.02, 0.05]], [0.263816, 1.273396]], [[0.78, -0.691, 5.2, -9.81, [0.01, 0.05, 0.05]], [0.621082, -1.85117]], [[-1.619, -0.338, 11.211, 0.0, [0.03, 0.01, 0.02, 0.01]], [-1.598199, 0.839977]], [[1.835, -1.641, 6.597, 2.0, [0.02, 0.02]], [1.761368, -1.939568]], [[1.699, 1.89, 11.648, 2.0, [0.01, 0.01, 0.01]], [1.747613, 1.439167]], [[-1.409, 0.693, 7.348, -9.81, [0.02, 0.02, 0.05, 0.05, 0.05, 0.01]], [-1.266157, 0.69937]], [[-1.118, 1.653, 18.431, 0.0, [0.03, 0.03]], [-0.982706, 2.547717]], [[1.52, -0.79, 13.208, 2.0, [0.03, 0.03, 0.02, 0.02, 0.05, 0.05]], [1.02811, -3.599677]]], [[[1.821, 1.198, 3.771, 0.0, [0.02, 0.01, 0.05, 0.02, 0.01]], [1.910483, 0.457456]], [[0.644, -0.151, 13.871, -9.81, [0.02, 0.02, 0.01, 0.01, 0.05, 0.02, 0.03]], [0.387894, -2.717601]], [[-1.926, 1.549, 6.213, -9.81, [0.01, 0.03, 0.01, 0.02, 0.02]], [-1.778987, 1.690133]], [[-0.485, 1.456, 18.965, 2.0, [0.01, 0.03, 0.05, 0.05, 0.02, 0.02]], [-0.07504, 2.805631]], [[1.693, 1.184, 10.982, -9.81, [0.02, 0.03, 0.05, 0.05]], [1.550068, -2.368135]], [[0.454, 0.048, 11.925, 0.0, [0.01, 0.01, 0.01]], [0.453003, -0.087359]], [[0.426, -0.985, 9.249, -9.81, [0.02, 0.05, 0.05]], [0.211891, -2.236693]], [[-1.855, 0.692, 12.133, 2.0, [0.02, 0.01, 0.01, 0.03]], [-1.747187, 2.021157]]], [[[1.462, -1.373, 3.135, 0.0, [0.05, 0.02, 0.02, 0.01, 0.02, 0.05, 0.03]], [1.102151, -2.133217]], [[-1.478, -0.428, 14.024, 2.0, [0.01, 0.02, 0.01]], [-1.476913, 0.36867]], [[1.606, 1.967, 9.66, 0.0, [0.05, 0.03, 0.01, 0.02, 0.03, 0.05, 0.01]], [1.674706, -1.223548]], [[-0.31, -1.257, 5.955, 0.0, [0.05, 0.03, 0.05]], [-0.455535, -1.0263]], [[-0.686, 1.111, 17.91, -9.81, [0.05, 0.03, 0.03, 0.03]], [-0.5152, 1.255652]], [[0.106, -1.937, 2.608, 0.0, [0.03, 0.01, 0.03, 0.05, 0.01, 0.05, 0.05, 0.02]], [-0.374085, -1.858207]], [[0.68, 1.896, 12.013, -9.81, [0.03, 0.03, 0.03]], [0.775896, 0.500859]], [[0.152, -1.091, 14.043, 0.0, [0.01, 0.02, 0.01, 0.02, 0.05, 0.01]], [0.009941, -1.229064]]], [[[-1.698, 0.325, 6.546, -9.81, [0.02, 0.02]], [-1.683974, 0.363268]], [[0.382, 0.792, 11.215, 0.0, [0.05, 0.01, 0.02, 0.05, 0.05, 0.03, 0.05, 0.03]], [0.411226, -0.538349]], [[-0.101, 1.196, 2.452, -9.81, [0.03, 0.02, 0.01, 0.03, 0.03, 0.02, 0.03, 0.01, 0.01]], [-0.048386, -0.598008]], [[-0.101, -1.02, 19.226, 2.0, [0.05, 0.01]], [-0.154839, -0.776626]], [[1.286, 1.196, 2.402, 0.0, [0.05, 0.05, 0.02, 0.01, 0.05, 0.05, 0.05, 0.03, 0.05]], [1.499807, 0.049865]], [[1.484, 1.78, 2.899, 2.0, [0.01, 0.02, 0.05, 0.01, 0.03]], [1.679732, 1.511762]], [[1.406, -0.862, 9.145, 0.0, [0.03, 0.01, 0.01, 0.03, 0.01, 0.01]], [1.257218, -2.031082]], [[-0.434, -1.688, 15.899, 0.0, [0.03, 0.05, 0.01, 0.02]], [-0.573341, -0.885589]]], [[[-0.841, -0.714, 0.875, 2.0, [0.05, 0.02, 0.02, 0.01, 0.01, 0.02, 0.02, 0.01]], [-0.919878, -0.283965]], [[-1.17, -1.869, 6.983, 2.0, [0.02, 0.02, 0.01, 0.01, 0.01, 0.03]], [-1.304253, -0.965785]], [[-0.421, -1.461, 6.131, 2.0, [0.02, 0.01, 0.03, 0.05, 0.01, 0.05]], [-0.597191, -0.719646]], [[0.363, 0.71, 3.317, 0.0, [0.01, 0.02]], [0.383751, 0.685568]], [[1.217, -0.953, 5.249, -9.81, [0.02, 0.01]], [1.181138, -1.356195]], [[1.94, 0.689, 18.476, 0.0, [0.05, 0.01, 0.03, 0.01, 0.05, 0.02, 0.03, 0.02, 0.02]], [1.133627, -6.57541]], [[1.097, 0.642, 16.162, 2.0, [0.01, 0.03]], [1.110042, 0.246936]], [[-1.434, -0.348, 10.741, -9.81, [0.03, 0.03, 0.03, 0.01, 0.05, 0.03, 0.03, 0.03, 0.01, 0.01]], [-1.336072, 1.031162]]]]\nfor i, (args, expected) in enumerate(fixtures[N-1]):\n    check(\"case %d\" % i, 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 with stipulated toy conventions and rounded float output; not a production physics engine or a proof of numerical stability. 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-physics_integrator_stability-time-corrected-verlet-step-pairing","generated_at":"2026-09-29T14:50:55.996410+00:00","license":"CC0-1.0","python":"3.12.14","seed":1,"split":"open-access"},"relevance":"Game and robotics physics loops depend on integrator update order, step control and stabilization terms; a wrong decision point turns a stable simulation into drifting or exploding motion.","repair":"The step being taken is dts[i]; the previous one is dts[i-1].","root_cause":"h and h_prev are read as dts[i-1] and dts[i].","sha256":"6774b1cd246932f5cba99593046fb3d53f4fda99298e5807f8c827c988610843","title":"Current and previous step lengths are swapped · case 01","variant":1,"variant_policy":"Five numbered records share a model and may reuse boundary fixtures.","verification":{"attempt":{"elapsed_ms":41.224,"exit_code":1,"observations":[{"actual":[0.332477,2.646618],"check":"case 0","expected":[0.263816,1.273396],"passed":false},{"actual":[0.399578,-6.281247],"check":"case 1","expected":[0.621082,-1.85117],"passed":false},{"actual":[-1.599653,0.728789],"check":"case 2","expected":[-1.598199,0.839977],"passed":false},{"actual":[1.761368,-1.939568],"check":"case 3","expected":[1.761368,-1.939568],"passed":true},{"actual":[1.747613,1.439167],"check":"case 4","expected":[1.747613,1.439167],"passed":true},{"actual":[-0.919286,11.165737],"check":"case 5","expected":[-1.266157,0.69937],"passed":false},{"actual":[-0.982706,2.547717],"check":"case 6","expected":[-0.982706,2.547717],"passed":true},{"actual":[1.093687,-3.613646],"check":"case 7","expected":[1.02811,-3.599677],"passed":false}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"case 0\", \"actual\": [0.332477, 2.646618], \"expected\": [0.263816, 1.273396], \"passed\": false}, {\"check\": \"case 1\", \"actual\": [0.399578, -6.281247], \"expected\": [0.621082, -1.85117], \"passed\": false}, {\"check\": \"case 2\", \"actual\": [-1.599653, 0.728789], \"expected\": [-1.598199, 0.839977], \"passed\": false}, {\"check\": \"case 3\", \"actual\": [1.761368, -1.939568], \"expected\": [1.761368, -1.939568], \"passed\": true}, {\"check\": \"case 4\", \"actual\": [1.747613, 1.439167], \"expected\": [1.747613, 1.439167], \"passed\": true}, {\"check\": \"case 5\", \"actual\": [-0.919286, 11.165737], \"expected\": [-1.266157, 0.69937], \"passed\": false}, {\"check\": \"case 6\", \"actual\": [-0.982706, 2.547717], \"expected\": [-0.982706, 2.547717], \"passed\": true}, {\"check\": \"case 7\", \"actual\": [1.093687, -3.613646], \"expected\": [1.02811, -3.599677], \"passed\": false}], \"passed\": false}\n"},"broken":{"elapsed_ms":39.286,"exit_code":1,"observations":[{"actual":[0.180662,0.021789],"check":"case 0","expected":[0.263816,1.273396],"passed":false},{"actual":[0.726567,-0.803221],"check":"case 1","expected":[0.621082,-1.85117],"passed":false},{"actual":[-1.594935,1.583951],"check":"case 2","expected":[-1.598199,0.839977],"passed":false},{"actual":[1.761368,-1.939568],"check":"case 3","expected":[1.761368,-1.939568],"passed":true},{"actual":[1.747613,1.439167],"check":"case 4","expected":[1.747613,1.439167],"passed":true},{"actual":[-1.324643,3.648329],"check":"case 5","expected":[-1.266157,0.69937],"passed":false},{"actual":[-0.982706,2.547717],"check":"case 6","expected":[-0.982706,2.547717],"passed":true},{"actual":[1.136947,-1.636623],"check":"case 7","expected":[1.02811,-3.599677],"passed":false}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"case 0\", \"actual\": [0.180662, 0.021789], \"expected\": [0.263816, 1.273396], \"passed\": false}, {\"check\": \"case 1\", \"actual\": [0.726567, -0.803221], \"expected\": [0.621082, -1.85117], \"passed\": false}, {\"check\": \"case 2\", \"actual\": [-1.594935, 1.583951], \"expected\": [-1.598199, 0.839977], \"passed\": false}, {\"check\": \"case 3\", \"actual\": [1.761368, -1.939568], \"expected\": [1.761368, -1.939568], \"passed\": true}, {\"check\": \"case 4\", \"actual\": [1.747613, 1.439167], \"expected\": [1.747613, 1.439167], \"passed\": true}, {\"check\": \"case 5\", \"actual\": [-1.324643, 3.648329], \"expected\": [-1.266157, 0.69937], \"passed\": false}, {\"check\": \"case 6\", \"actual\": [-0.982706, 2.547717], \"expected\": [-0.982706, 2.547717], \"passed\": true}, {\"check\": \"case 7\", \"actual\": [1.136947, -1.636623], \"expected\": [1.02811, -3.599677], \"passed\": false}], \"passed\": false}\n"},"fixed":{"elapsed_ms":39.744,"exit_code":0,"observations":[{"actual":[0.263816,1.273396],"check":"case 0","expected":[0.263816,1.273396],"passed":true},{"actual":[0.621082,-1.85117],"check":"case 1","expected":[0.621082,-1.85117],"passed":true},{"actual":[-1.598199,0.839977],"check":"case 2","expected":[-1.598199,0.839977],"passed":true},{"actual":[1.761368,-1.939568],"check":"case 3","expected":[1.761368,-1.939568],"passed":true},{"actual":[1.747613,1.439167],"check":"case 4","expected":[1.747613,1.439167],"passed":true},{"actual":[-1.266157,0.69937],"check":"case 5","expected":[-1.266157,0.69937],"passed":true},{"actual":[-0.982706,2.547717],"check":"case 6","expected":[-0.982706,2.547717],"passed":true},{"actual":[1.02811,-3.599677],"check":"case 7","expected":[1.02811,-3.599677],"passed":true}],"passed":true,"stderr":"","stdout":"{\"observations\": [{\"check\": \"case 0\", \"actual\": [0.263816, 1.273396], \"expected\": [0.263816, 1.273396], \"passed\": true}, {\"check\": \"case 1\", \"actual\": [0.621082, -1.85117], \"expected\": [0.621082, -1.85117], \"passed\": true}, {\"check\": \"case 2\", \"actual\": [-1.598199, 0.839977], \"expected\": [-1.598199, 0.839977], \"passed\": true}, {\"check\": \"case 3\", \"actual\": [1.761368, -1.939568], \"expected\": [1.761368, -1.939568], \"passed\": true}, {\"check\": \"case 4\", \"actual\": [1.747613, 1.439167], \"expected\": [1.747613, 1.439167], \"passed\": true}, {\"check\": \"case 5\", \"actual\": [-1.266157, 0.69937], \"expected\": [-1.266157, 0.69937], \"passed\": true}, {\"check\": \"case 6\", \"actual\": [-0.982706, 2.547717], \"expected\": [-0.982706, 2.547717], \"passed\": true}, {\"check\": \"case 7\", \"actual\": [1.02811, -3.599677], \"expected\": [1.02811, -3.599677], \"passed\": true}], \"passed\": true}\n"}},"verified":true,"visibility":"public"}