{"abstract":"The returned state is for T-h rather than T.","category":"Orbital propagation","checks":7,"contract":"Input [r0, v0, mu, T, steps] for a planar two-body orbit. Integrate state [x,y,vx,vy] with acceleration -mu r/|r|^3 using classical RK4 with h=T/steps for exactly steps steps. Return the final state rounded to 6 decimals.","contract_signature":"x","evaluation_group":"w2-orbital_propagation-rk4_two_body","failed_approach":"Running steps+1 times overshoots the end time.","family":"w2-orbital_propagation-rk4_two_body-step-count","id":"FA-69541","implementations":{"attempt":{"sha256":"3fc057c6b677a8c74afab49b5942990ca0bb810f6f3f3d0ade36bdf443cb5c41","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\nimport math\nN = 1\nobservations = []\ndef solve(x):\n    r0,v0,mu,T,steps=x\n    h=T/steps\n    def f(s):\n        px,py,vx,vy=s\n        rr=(px*px+py*py)**1.5\n        return [vx,vy,-mu*px/rr,-mu*py/rr]\n    s=list(r0)+list(v0)\n    for _ in range(steps+1):\n        k1=f(s)\n        k2=f([s[i]+h/2*k1[i] for i in range(4)])\n        k3=f([s[i]+h/2*k2[i] for i in range(4)])\n        k4=f([s[i]+h*k3[i] for i in range(4)])\n        s=[s[i]+h/6*(k1[i]+2*k2[i]+2*k3[i]+k4[i]) for i in range(4)]\n    return [round(c,6) for c in s]\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\nfixtures = [[('fixed-step rk4 two-body propagation [[7000.0, 0.0], [0.0, 7.546], 398600.4418, 600.0, 12]', [[7000.0, 0.0], [0.0, 7.546], 398600.4418, 600.0, 12], [5586.092992, 4218.445527, -4.547562, 6.021804]), ('fixed-step rk4 two-body propagation [[7000.0, 0.0], [0.0, 8.5], 398600.4418, 900.0, 20]', [[7000.0, 0.0], [0.0, 8.5], 398600.4418, 900.0, 20], [4101.15166, 6610.394483, -5.692596, 5.332573]), ('fixed-step rk4 two-body propagation [[0.0, 9000.0], [-6.2, 0.8], 398600.4418, 1200.0, 15]', [[0.0, 9000.0], [-6.2, 0.8], 398600.4418, 1200.0, 15], [-6593.162659, 6759.502773, -4.170281, -4.18782]), ('fixed-step rk4 two-body propagation [[1.0, 0.0], [0.0, 1.0], 1.0, 3.0, 30]', [[1.0, 0.0], [0.0, 1.0], 1.0, 3.0, 30], [-0.98999, 0.141112, -0.141113, -0.989997]), ('fixed-step rk4 two-body propagation [[1.0, 0.0], [0.0, 1.2], 1.0, 5.0, 25]', [[1.0, 0.0], [0.0, 1.2], 1.0, 5.0, 25], [-2.095663, 1.089551, -0.384431, -0.37274]), ('fixed-step rk4 two-body propagation [[-1.5, 0.5], [0.1, -0.7], 1.0, 2.0, 10]', [[-1.5, 0.5], [0.1, -0.7], 1.0, 2.0, 10], [-0.154684, -0.721678, 1.394034, 0.039166]), ('fixed-step rk4 two-body propagation [[6800.0, 1200.0], [-1.1, 7.4], 398600.4418, 300.0, 6]', [[6800.0, 1200.0], [-1.1, 7.4], 398600.4418, 300.0, 6], [6111.623093, 3316.078893, -3.439749, 6.583115])], [('fixed-step rk4 two-body propagation [[7000.0, 0.0], [0.0, 8.5], 398600.4418, 900.0, 20]', [[7000.0, 0.0], [0.0, 8.5], 398600.4418, 900.0, 20], [4101.15166, 6610.394483, -5.692596, 5.332573]), ('fixed-step rk4 two-body propagation [[1.0, 0.0], [0.0, 1.0], 1.0, 3.0, 30]', [[1.0, 0.0], [0.0, 1.0], 1.0, 3.0, 30], [-0.98999, 0.141112, -0.141113, -0.989997]), ('fixed-step rk4 two-body propagation [[1.0, 0.0], [0.0, 1.2], 1.0, 5.0, 25]', [[1.0, 0.0], [0.0, 1.2], 1.0, 5.0, 25], [-2.095663, 1.089551, -0.384431, -0.37274]), ('fixed-step rk4 two-body propagation [[-1.5, 0.5], [0.1, -0.7], 1.0, 2.0, 10]', [[-1.5, 0.5], [0.1, -0.7], 1.0, 2.0, 10], [-0.154684, -0.721678, 1.394034, 0.039166]), ('fixed-step rk4 two-body propagation [[6800.0, 1200.0], [-1.1, 7.4], 398600.4418, 300.0, 6]', [[6800.0, 1200.0], [-1.1, 7.4], 398600.4418, 300.0, 6], [6111.623093, 3316.078893, -3.439749, 6.583115]), ('fixed-step rk4 two-body propagation [[2.0, 0.0], [0.0, 0.5], 1.0, 4.0, 8]', [[2.0, 0.0], [0.0, 0.5], 1.0, 4.0, 8], [-0.108631, 0.939625, -0.993051, -0.614991]), ('fixed-step rk4 two-body propagation [[7000.0, 0.0], [0.0, 7.546], 398600.4418, 600.0, 12]', [[7000.0, 0.0], [0.0, 7.546], 398600.4418, 600.0, 12], [5586.092992, 4218.445527, -4.547562, 6.021804])], [('fixed-step rk4 two-body propagation [[0.0, 9000.0], [-6.2, 0.8], 398600.4418, 1200.0, 15]', [[0.0, 9000.0], [-6.2, 0.8], 398600.4418, 1200.0, 15], [-6593.162659, 6759.502773, -4.170281, -4.18782]), ('fixed-step rk4 two-body propagation [[6800.0, 1200.0], [-1.1, 7.4], 398600.4418, 300.0, 6]', [[6800.0, 1200.0], [-1.1, 7.4], 398600.4418, 300.0, 6], [6111.623093, 3316.078893, -3.439749, 6.583115]), ('fixed-step rk4 two-body propagation [[2.0, 0.0], [0.0, 0.5], 1.0, 4.0, 8]', [[2.0, 0.0], [0.0, 0.5], 1.0, 4.0, 8], [-0.108631, 0.939625, -0.993051, -0.614991]), ('fixed-step rk4 two-body propagation [[7000.0, 0.0], [0.0, 7.546], 398600.4418, 600.0, 12]', [[7000.0, 0.0], [0.0, 7.546], 398600.4418, 600.0, 12], [5586.092992, 4218.445527, -4.547562, 6.021804]), ('fixed-step rk4 two-body propagation [[7000.0, 0.0], [0.0, 8.5], 398600.4418, 900.0, 20]', [[7000.0, 0.0], [0.0, 8.5], 398600.4418, 900.0, 20], [4101.15166, 6610.394483, -5.692596, 5.332573]), ('fixed-step rk4 two-body propagation [[1.0, 0.0], [0.0, 1.0], 1.0, 3.0, 30]', [[1.0, 0.0], [0.0, 1.0], 1.0, 3.0, 30], [-0.98999, 0.141112, -0.141113, -0.989997]), ('fixed-step rk4 two-body propagation [[1.0, 0.0], [0.0, 1.2], 1.0, 5.0, 25]', [[1.0, 0.0], [0.0, 1.2], 1.0, 5.0, 25], [-2.095663, 1.089551, -0.384431, -0.37274])], [('fixed-step rk4 two-body propagation [[1.0, 0.0], [0.0, 1.0], 1.0, 3.0, 30]', [[1.0, 0.0], [0.0, 1.0], 1.0, 3.0, 30], [-0.98999, 0.141112, -0.141113, -0.989997]), ('fixed-step rk4 two-body propagation [[7000.0, 0.0], [0.0, 8.5], 398600.4418, 900.0, 20]', [[7000.0, 0.0], [0.0, 8.5], 398600.4418, 900.0, 20], [4101.15166, 6610.394483, -5.692596, 5.332573]), ('fixed-step rk4 two-body propagation [[0.0, 9000.0], [-6.2, 0.8], 398600.4418, 1200.0, 15]', [[0.0, 9000.0], [-6.2, 0.8], 398600.4418, 1200.0, 15], [-6593.162659, 6759.502773, -4.170281, -4.18782]), ('fixed-step rk4 two-body propagation [[1.0, 0.0], [0.0, 1.2], 1.0, 5.0, 25]', [[1.0, 0.0], [0.0, 1.2], 1.0, 5.0, 25], [-2.095663, 1.089551, -0.384431, -0.37274]), ('fixed-step rk4 two-body propagation [[-1.5, 0.5], [0.1, -0.7], 1.0, 2.0, 10]', [[-1.5, 0.5], [0.1, -0.7], 1.0, 2.0, 10], [-0.154684, -0.721678, 1.394034, 0.039166]), ('fixed-step rk4 two-body propagation [[6800.0, 1200.0], [-1.1, 7.4], 398600.4418, 300.0, 6]', [[6800.0, 1200.0], [-1.1, 7.4], 398600.4418, 300.0, 6], [6111.623093, 3316.078893, -3.439749, 6.583115]), ('fixed-step rk4 two-body propagation [[2.0, 0.0], [0.0, 0.5], 1.0, 4.0, 8]', [[2.0, 0.0], [0.0, 0.5], 1.0, 4.0, 8], [-0.108631, 0.939625, -0.993051, -0.614991])], [('fixed-step rk4 two-body propagation [[1.0, 0.0], [0.0, 1.2], 1.0, 5.0, 25]', [[1.0, 0.0], [0.0, 1.2], 1.0, 5.0, 25], [-2.095663, 1.089551, -0.384431, -0.37274]), ('fixed-step rk4 two-body propagation [[-1.5, 0.5], [0.1, -0.7], 1.0, 2.0, 10]', [[-1.5, 0.5], [0.1, -0.7], 1.0, 2.0, 10], [-0.154684, -0.721678, 1.394034, 0.039166]), ('fixed-step rk4 two-body propagation [[6800.0, 1200.0], [-1.1, 7.4], 398600.4418, 300.0, 6]', [[6800.0, 1200.0], [-1.1, 7.4], 398600.4418, 300.0, 6], [6111.623093, 3316.078893, -3.439749, 6.583115]), ('fixed-step rk4 two-body propagation [[2.0, 0.0], [0.0, 0.5], 1.0, 4.0, 8]', [[2.0, 0.0], [0.0, 0.5], 1.0, 4.0, 8], [-0.108631, 0.939625, -0.993051, -0.614991]), ('fixed-step rk4 two-body propagation [[7000.0, 0.0], [0.0, 7.546], 398600.4418, 600.0, 12]', [[7000.0, 0.0], [0.0, 7.546], 398600.4418, 600.0, 12], [5586.092992, 4218.445527, -4.547562, 6.021804]), ('fixed-step rk4 two-body propagation [[7000.0, 0.0], [0.0, 8.5], 398600.4418, 900.0, 20]', [[7000.0, 0.0], [0.0, 8.5], 398600.4418, 900.0, 20], [4101.15166, 6610.394483, -5.692596, 5.332573]), ('fixed-step rk4 two-body propagation [[0.0, 9000.0], [-6.2, 0.8], 398600.4418, 1200.0, 15]', [[0.0, 9000.0], [-6.2, 0.8], 398600.4418, 1200.0, 15], [-6593.162659, 6759.502773, -4.170281, -4.18782])]]\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":"643d529cce4a2dd44fabee92d7f9dedca921c0d7283b9162f13fade2ffa0b84e","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\nimport math\nN = 1\nobservations = []\ndef solve(x):\n    r0,v0,mu,T,steps=x\n    h=T/steps\n    def f(s):\n        px,py,vx,vy=s\n        rr=(px*px+py*py)**1.5\n        return [vx,vy,-mu*px/rr,-mu*py/rr]\n    s=list(r0)+list(v0)\n    for _ in range(steps-1):\n        k1=f(s)\n        k2=f([s[i]+h/2*k1[i] for i in range(4)])\n        k3=f([s[i]+h/2*k2[i] for i in range(4)])\n        k4=f([s[i]+h*k3[i] for i in range(4)])\n        s=[s[i]+h/6*(k1[i]+2*k2[i]+2*k3[i]+k4[i]) for i in range(4)]\n    return [round(c,6) for c in s]\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\nfixtures = [[('fixed-step rk4 two-body propagation [[7000.0, 0.0], [0.0, 7.546], 398600.4418, 600.0, 12]', [[7000.0, 0.0], [0.0, 7.546], 398600.4418, 600.0, 12], [5586.092992, 4218.445527, -4.547562, 6.021804]), ('fixed-step rk4 two-body propagation [[7000.0, 0.0], [0.0, 8.5], 398600.4418, 900.0, 20]', [[7000.0, 0.0], [0.0, 8.5], 398600.4418, 900.0, 20], [4101.15166, 6610.394483, -5.692596, 5.332573]), ('fixed-step rk4 two-body propagation [[0.0, 9000.0], [-6.2, 0.8], 398600.4418, 1200.0, 15]', [[0.0, 9000.0], [-6.2, 0.8], 398600.4418, 1200.0, 15], [-6593.162659, 6759.502773, -4.170281, -4.18782]), ('fixed-step rk4 two-body propagation [[1.0, 0.0], [0.0, 1.0], 1.0, 3.0, 30]', [[1.0, 0.0], [0.0, 1.0], 1.0, 3.0, 30], [-0.98999, 0.141112, -0.141113, -0.989997]), ('fixed-step rk4 two-body propagation [[1.0, 0.0], [0.0, 1.2], 1.0, 5.0, 25]', [[1.0, 0.0], [0.0, 1.2], 1.0, 5.0, 25], [-2.095663, 1.089551, -0.384431, -0.37274]), ('fixed-step rk4 two-body propagation [[-1.5, 0.5], [0.1, -0.7], 1.0, 2.0, 10]', [[-1.5, 0.5], [0.1, -0.7], 1.0, 2.0, 10], [-0.154684, -0.721678, 1.394034, 0.039166]), ('fixed-step rk4 two-body propagation [[6800.0, 1200.0], [-1.1, 7.4], 398600.4418, 300.0, 6]', [[6800.0, 1200.0], [-1.1, 7.4], 398600.4418, 300.0, 6], [6111.623093, 3316.078893, -3.439749, 6.583115])], [('fixed-step rk4 two-body propagation [[7000.0, 0.0], [0.0, 8.5], 398600.4418, 900.0, 20]', [[7000.0, 0.0], [0.0, 8.5], 398600.4418, 900.0, 20], [4101.15166, 6610.394483, -5.692596, 5.332573]), ('fixed-step rk4 two-body propagation [[1.0, 0.0], [0.0, 1.0], 1.0, 3.0, 30]', [[1.0, 0.0], [0.0, 1.0], 1.0, 3.0, 30], [-0.98999, 0.141112, -0.141113, -0.989997]), ('fixed-step rk4 two-body propagation [[1.0, 0.0], [0.0, 1.2], 1.0, 5.0, 25]', [[1.0, 0.0], [0.0, 1.2], 1.0, 5.0, 25], [-2.095663, 1.089551, -0.384431, -0.37274]), ('fixed-step rk4 two-body propagation [[-1.5, 0.5], [0.1, -0.7], 1.0, 2.0, 10]', [[-1.5, 0.5], [0.1, -0.7], 1.0, 2.0, 10], [-0.154684, -0.721678, 1.394034, 0.039166]), ('fixed-step rk4 two-body propagation [[6800.0, 1200.0], [-1.1, 7.4], 398600.4418, 300.0, 6]', [[6800.0, 1200.0], [-1.1, 7.4], 398600.4418, 300.0, 6], [6111.623093, 3316.078893, -3.439749, 6.583115]), ('fixed-step rk4 two-body propagation [[2.0, 0.0], [0.0, 0.5], 1.0, 4.0, 8]', [[2.0, 0.0], [0.0, 0.5], 1.0, 4.0, 8], [-0.108631, 0.939625, -0.993051, -0.614991]), ('fixed-step rk4 two-body propagation [[7000.0, 0.0], [0.0, 7.546], 398600.4418, 600.0, 12]', [[7000.0, 0.0], [0.0, 7.546], 398600.4418, 600.0, 12], [5586.092992, 4218.445527, -4.547562, 6.021804])], [('fixed-step rk4 two-body propagation [[0.0, 9000.0], [-6.2, 0.8], 398600.4418, 1200.0, 15]', [[0.0, 9000.0], [-6.2, 0.8], 398600.4418, 1200.0, 15], [-6593.162659, 6759.502773, -4.170281, -4.18782]), ('fixed-step rk4 two-body propagation [[6800.0, 1200.0], [-1.1, 7.4], 398600.4418, 300.0, 6]', [[6800.0, 1200.0], [-1.1, 7.4], 398600.4418, 300.0, 6], [6111.623093, 3316.078893, -3.439749, 6.583115]), ('fixed-step rk4 two-body propagation [[2.0, 0.0], [0.0, 0.5], 1.0, 4.0, 8]', [[2.0, 0.0], [0.0, 0.5], 1.0, 4.0, 8], [-0.108631, 0.939625, -0.993051, -0.614991]), ('fixed-step rk4 two-body propagation [[7000.0, 0.0], [0.0, 7.546], 398600.4418, 600.0, 12]', [[7000.0, 0.0], [0.0, 7.546], 398600.4418, 600.0, 12], [5586.092992, 4218.445527, -4.547562, 6.021804]), ('fixed-step rk4 two-body propagation [[7000.0, 0.0], [0.0, 8.5], 398600.4418, 900.0, 20]', [[7000.0, 0.0], [0.0, 8.5], 398600.4418, 900.0, 20], [4101.15166, 6610.394483, -5.692596, 5.332573]), ('fixed-step rk4 two-body propagation [[1.0, 0.0], [0.0, 1.0], 1.0, 3.0, 30]', [[1.0, 0.0], [0.0, 1.0], 1.0, 3.0, 30], [-0.98999, 0.141112, -0.141113, -0.989997]), ('fixed-step rk4 two-body propagation [[1.0, 0.0], [0.0, 1.2], 1.0, 5.0, 25]', [[1.0, 0.0], [0.0, 1.2], 1.0, 5.0, 25], [-2.095663, 1.089551, -0.384431, -0.37274])], [('fixed-step rk4 two-body propagation [[1.0, 0.0], [0.0, 1.0], 1.0, 3.0, 30]', [[1.0, 0.0], [0.0, 1.0], 1.0, 3.0, 30], [-0.98999, 0.141112, -0.141113, -0.989997]), ('fixed-step rk4 two-body propagation [[7000.0, 0.0], [0.0, 8.5], 398600.4418, 900.0, 20]', [[7000.0, 0.0], [0.0, 8.5], 398600.4418, 900.0, 20], [4101.15166, 6610.394483, -5.692596, 5.332573]), ('fixed-step rk4 two-body propagation [[0.0, 9000.0], [-6.2, 0.8], 398600.4418, 1200.0, 15]', [[0.0, 9000.0], [-6.2, 0.8], 398600.4418, 1200.0, 15], [-6593.162659, 6759.502773, -4.170281, -4.18782]), ('fixed-step rk4 two-body propagation [[1.0, 0.0], [0.0, 1.2], 1.0, 5.0, 25]', [[1.0, 0.0], [0.0, 1.2], 1.0, 5.0, 25], [-2.095663, 1.089551, -0.384431, -0.37274]), ('fixed-step rk4 two-body propagation [[-1.5, 0.5], [0.1, -0.7], 1.0, 2.0, 10]', [[-1.5, 0.5], [0.1, -0.7], 1.0, 2.0, 10], [-0.154684, -0.721678, 1.394034, 0.039166]), ('fixed-step rk4 two-body propagation [[6800.0, 1200.0], [-1.1, 7.4], 398600.4418, 300.0, 6]', [[6800.0, 1200.0], [-1.1, 7.4], 398600.4418, 300.0, 6], [6111.623093, 3316.078893, -3.439749, 6.583115]), ('fixed-step rk4 two-body propagation [[2.0, 0.0], [0.0, 0.5], 1.0, 4.0, 8]', [[2.0, 0.0], [0.0, 0.5], 1.0, 4.0, 8], [-0.108631, 0.939625, -0.993051, -0.614991])], [('fixed-step rk4 two-body propagation [[1.0, 0.0], [0.0, 1.2], 1.0, 5.0, 25]', [[1.0, 0.0], [0.0, 1.2], 1.0, 5.0, 25], [-2.095663, 1.089551, -0.384431, -0.37274]), ('fixed-step rk4 two-body propagation [[-1.5, 0.5], [0.1, -0.7], 1.0, 2.0, 10]', [[-1.5, 0.5], [0.1, -0.7], 1.0, 2.0, 10], [-0.154684, -0.721678, 1.394034, 0.039166]), ('fixed-step rk4 two-body propagation [[6800.0, 1200.0], [-1.1, 7.4], 398600.4418, 300.0, 6]', [[6800.0, 1200.0], [-1.1, 7.4], 398600.4418, 300.0, 6], [6111.623093, 3316.078893, -3.439749, 6.583115]), ('fixed-step rk4 two-body propagation [[2.0, 0.0], [0.0, 0.5], 1.0, 4.0, 8]', [[2.0, 0.0], [0.0, 0.5], 1.0, 4.0, 8], [-0.108631, 0.939625, -0.993051, -0.614991]), ('fixed-step rk4 two-body propagation [[7000.0, 0.0], [0.0, 7.546], 398600.4418, 600.0, 12]', [[7000.0, 0.0], [0.0, 7.546], 398600.4418, 600.0, 12], [5586.092992, 4218.445527, -4.547562, 6.021804]), ('fixed-step rk4 two-body propagation [[7000.0, 0.0], [0.0, 8.5], 398600.4418, 900.0, 20]', [[7000.0, 0.0], [0.0, 8.5], 398600.4418, 900.0, 20], [4101.15166, 6610.394483, -5.692596, 5.332573]), ('fixed-step rk4 two-body propagation [[0.0, 9000.0], [-6.2, 0.8], 398600.4418, 1200.0, 15]', [[0.0, 9000.0], [-6.2, 0.8], 398600.4418, 1200.0, 15], [-6593.162659, 6759.502773, -4.170281, -4.18782])]]\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 toy two-body model with stipulated constants and conventions; not flight dynamics software or a validated SGP4 implementation. 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-orbital_propagation-rk4_two_body-step-count","generated_at":"2026-09-29T14:48:12.457957+00:00","license":"CC0-1.0","python":"3.12.14","seed":1,"split":"open-access"},"relevance":"Orbit determination and mission planning chain many small conversions; one wrong branch or unit silently moves a spacecraft by kilometres.","root_cause":"The step loop runs steps-1 times.","sha256":"c95e88fa7ba46f976f92ada0988b07349b28cf5f9098db5ce661acb2b82397f3","title":"Fixed-step RK4 two-body propagation: Loop stops one step short of the end time · case 01","variant":1,"variant_policy":"Five numbered records share a model and may reuse boundary fixtures.","verified":true,"visibility":"public","verification":{"attempt":{"elapsed_ms":42.127,"exit_code":1,"observations":[{"actual":[5350.712369,4513.263533,-4.865384,5.768062],"check":"fixed-step rk4 two-body propagation [[7000.0, 0.0], [0.0, 7.546], 398600.4418, 600.0, 12]","expected":[5586.092992,4218.445527,-4.547562,6.021804],"passed":false},{"actual":[3841.572789,6844.676546,-5.841949,5.079625],"check":"fixed-step rk4 two-body propagation [[7000.0, 0.0], [0.0, 8.5], 398600.4418, 900.0, 20]","expected":[4101.15166,6610.394483,-5.692596,5.332573],"passed":false},{"actual":[-6916.621339,6414.399377,-3.914015,-4.437708],"check":"fixed-step rk4 two-body propagation [[0.0, 9000.0], [-6.2, 0.8], 398600.4418, 1200.0, 15]","expected":[-6593.162659,6759.502773,-4.170281,-4.18782],"passed":false},{"actual":[-0.999132,0.041572,-0.041572,-0.999139],"check":"fixed-step rk4 two-body propagation [[1.0, 0.0], [0.0, 1.0], 1.0, 3.0, 30]","expected":[-0.98999,0.141112,-0.141113,-0.989997],"passed":false},{"actual":[-2.169375,1.01341,-0.352725,-0.388379],"check":"fixed-step rk4 two-body propagation [[1.0, 0.0], [0.0, 1.2], 1.0, 5.0, 25]","expected":[-2.095663,1.089551,-0.384431,-0.37274],"passed":false},{"actual":[0.127185,-0.675339,1.398962,0.433932],"check":"fixed-step rk4 two-body propagation [[-1.5, 0.5], [0.1, -0.7], 1.0, 2.0, 10]","expected":[-0.154684,-0.721678,1.394034,0.039166],"passed":false},{"actual":[5930.672027,3640.162676,-3.796369,6.377119],"check":"fixed-step rk4 two-body propagation [[6800.0, 1200.0], [-1.1, 7.4], 398600.4418, 300.0, 6]","expected":[6111.623093,3316.078893,-3.439749,6.583115],"passed":false}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"fixed-step rk4 two-body propagation [[7000.0, 0.0], [0.0, 7.546], 398600.4418, 600.0, 12]\", \"actual\": [5350.712369, 4513.263533, -4.865384, 5.768062], \"expected\": [5586.092992, 4218.445527, -4.547562, 6.021804], \"passed\": false}, {\"check\": \"fixed-step rk4 two-body propagation [[7000.0, 0.0], [0.0, 8.5], 398600.4418, 900.0, 20]\", \"actual\": [3841.572789, 6844.676546, -5.841949, 5.079625], \"expected\": [4101.15166, 6610.394483, -5.692596, 5.332573], \"passed\": false}, {\"check\": \"fixed-step rk4 two-body propagation [[0.0, 9000.0], [-6.2, 0.8], 398600.4418, 1200.0, 15]\", \"actual\": [-6916.621339, 6414.399377, -3.914015, -4.437708], \"expected\": [-6593.162659, 6759.502773, -4.170281, -4.18782], \"passed\": false}, {\"check\": \"fixed-step rk4 two-body propagation [[1.0, 0.0], [0.0, 1.0], 1.0, 3.0, 30]\", \"actual\": [-0.999132, 0.041572, -0.041572, -0.999139], \"expected\": [-0.98999, 0.141112, -0.141113, -0.989997], \"passed\": false}, {\"check\": \"fixed-step rk4 two-body propagation [[1.0, 0.0], [0.0, 1.2], 1.0, 5.0, 25]\", \"actual\": [-2.169375, 1.01341, -0.352725, -0.388379], \"expected\": [-2.095663, 1.089551, -0.384431, -0.37274], \"passed\": false}, {\"check\": \"fixed-step rk4 two-body propagation [[-1.5, 0.5], [0.1, -0.7], 1.0, 2.0, 10]\", \"actual\": [0.127185, -0.675339, 1.398962, 0.433932], \"expected\": [-0.154684, -0.721678, 1.394034, 0.039166], \"passed\": false}, {\"check\": \"fixed-step rk4 two-body propagation [[6800.0, 1200.0], [-1.1, 7.4], 398600.4418, 300.0, 6]\", \"actual\": [5930.672027, 3640.162676, -3.796369, 6.377119], \"expected\": [6111.623093, 3316.078893, -3.439749, 6.583115], \"passed\": false}], \"passed\": false}\n"},"broken":{"elapsed_ms":39.188,"exit_code":1,"observations":[{"actual":[5805.248401,3911.374738,-4.216532,6.258055],"check":"fixed-step rk4 two-body propagation [[7000.0, 0.0], [0.0, 7.546], 398600.4418, 600.0, 12]","expected":[5586.092992,4218.445527,-4.547562,6.021804],"passed":false},{"actual":[4353.697853,6364.781831,-5.529339,5.583062],"check":"fixed-step rk4 two-body propagation [[7000.0, 0.0], [0.0, 8.5], 398600.4418, 900.0, 20]","expected":[4101.15166,6610.394483,-5.692596,5.332573],"passed":false},{"actual":[-6249.728053,7084.127014,-4.413362,-3.9258],"check":"fixed-step rk4 two-body propagation [[0.0, 9000.0], [-6.2, 0.8], 398600.4418, 1200.0, 15]","expected":[-6593.162659,6759.502773,-4.170281,-4.18782],"passed":false},{"actual":[-0.970956,0.239242,-0.239243,-0.970963],"check":"fixed-step rk4 two-body propagation [[1.0, 0.0], [0.0, 1.0], 1.0, 3.0, 30]","expected":[-0.98999,0.141112,-0.141113,-0.989997],"passed":false},{"actual":[-2.01559,1.162383,-0.416337,-0.355256],"check":"fixed-step rk4 two-body propagation [[1.0, 0.0], [0.0, 1.2], 1.0, 5.0, 25]","expected":[-2.095663,1.089551,-0.384431,-0.37274],"passed":false},{"actual":[-0.422527,-0.696919,1.271349,-0.269727],"check":"fixed-step rk4 two-body propagation [[-1.5, 0.5], [0.1, -0.7], 1.0, 2.0, 10]","expected":[-0.154684,-0.721678,1.394034,0.039166],"passed":false},{"actual":[6274.461901,2982.168181,-3.072028,6.770094],"check":"fixed-step rk4 two-body propagation [[6800.0, 1200.0], [-1.1, 7.4], 398600.4418, 300.0, 6]","expected":[6111.623093,3316.078893,-3.439749,6.583115],"passed":false}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"fixed-step rk4 two-body propagation [[7000.0, 0.0], [0.0, 7.546], 398600.4418, 600.0, 12]\", \"actual\": [5805.248401, 3911.374738, -4.216532, 6.258055], \"expected\": [5586.092992, 4218.445527, -4.547562, 6.021804], \"passed\": false}, {\"check\": \"fixed-step rk4 two-body propagation [[7000.0, 0.0], [0.0, 8.5], 398600.4418, 900.0, 20]\", \"actual\": [4353.697853, 6364.781831, -5.529339, 5.583062], \"expected\": [4101.15166, 6610.394483, -5.692596, 5.332573], \"passed\": false}, {\"check\": \"fixed-step rk4 two-body propagation [[0.0, 9000.0], [-6.2, 0.8], 398600.4418, 1200.0, 15]\", \"actual\": [-6249.728053, 7084.127014, -4.413362, -3.9258], \"expected\": [-6593.162659, 6759.502773, -4.170281, -4.18782], \"passed\": false}, {\"check\": \"fixed-step rk4 two-body propagation [[1.0, 0.0], [0.0, 1.0], 1.0, 3.0, 30]\", \"actual\": [-0.970956, 0.239242, -0.239243, -0.970963], \"expected\": [-0.98999, 0.141112, -0.141113, -0.989997], \"passed\": false}, {\"check\": \"fixed-step rk4 two-body propagation [[1.0, 0.0], [0.0, 1.2], 1.0, 5.0, 25]\", \"actual\": [-2.01559, 1.162383, -0.416337, -0.355256], \"expected\": [-2.095663, 1.089551, -0.384431, -0.37274], \"passed\": false}, {\"check\": \"fixed-step rk4 two-body propagation [[-1.5, 0.5], [0.1, -0.7], 1.0, 2.0, 10]\", \"actual\": [-0.422527, -0.696919, 1.271349, -0.269727], \"expected\": [-0.154684, -0.721678, 1.394034, 0.039166], \"passed\": false}, {\"check\": \"fixed-step rk4 two-body propagation [[6800.0, 1200.0], [-1.1, 7.4], 398600.4418, 300.0, 6]\", \"actual\": [6274.461901, 2982.168181, -3.072028, 6.770094], \"expected\": [6111.623093, 3316.078893, -3.439749, 6.583115], \"passed\": false}], \"passed\": false}\n"}},"member_only":{"stages":["fixed"],"fields":["implementations.fixed","verification.fixed","harness","repair"],"note":"The verified repair, its recorded checks, the repair description, and the scoring harness are available to members."}}