Build (method = -2) #dp: 17646 Step-3' Graph: 97 vertices and 3986 arcs (0.09s) Step-4' Graph: 97 vertices and 3986 arcs (0.09s) #V4/#V3 = 1.00 #A4/#A3 = 1.00 Ready! (0.09s) Optimize a model with 177 rows, 3987 columns and 11778 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.03s Presolved: 175 rows, 3985 columns, 11774 nonzeros Variable types: 0 continuous, 3985 integer (0 binary) Found heuristic solution: objective 1241.0000000 Found heuristic solution: objective 951.0000000 Optimize a model with 175 rows, 3985 columns and 11774 nonzeros Presolved: 175 rows, 3985 columns, 11774 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 6.115e+03 Factor NZ : 9.391e+03 (roughly 2 MBytes of memory) Factor Ops : 6.987e+05 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 4.69957707e+04 -1.78698710e+05 5.60e+04 2.22e-16 4.28e+02 0s 1 1.09122246e+04 -7.63009811e+04 8.39e+03 1.22e-15 6.89e+01 0s 2 2.39649601e+03 -3.86332496e+04 9.52e+02 7.55e-14 1.08e+01 0s 3 1.26040396e+03 -1.15207221e+04 2.21e+01 2.44e-14 1.67e+00 0s 4 1.19081133e+03 -3.58563536e+03 6.11e-02 8.88e-15 5.94e-01 0s 5 1.10856465e+03 -2.92399966e+03 4.84e-02 7.11e-15 5.01e-01 0s 6 8.66917778e+02 -1.19372500e+03 1.23e-02 3.11e-15 2.56e-01 0s 7 6.09245526e+02 -3.69463985e+02 5.73e-03 8.88e-16 1.22e-01 0s 8 4.34344600e+02 -1.23696827e+01 2.88e-03 7.16e-16 5.55e-02 0s 9 3.31406194e+02 8.08733558e+01 1.50e-03 7.04e-16 3.11e-02 0s 10 3.08826485e+02 1.40881475e+02 1.15e-03 6.84e-16 2.09e-02 0s 11 2.77926288e+02 1.83784722e+02 5.60e-04 7.70e-16 1.17e-02 0s 12 2.68491356e+02 2.11058054e+02 3.86e-04 7.19e-16 7.13e-03 0s 13 2.63876199e+02 2.19040823e+02 2.95e-04 7.85e-16 5.57e-03 0s 14 2.62590894e+02 2.25527010e+02 2.10e-04 7.77e-16 4.60e-03 0s 15 2.62813338e+02 2.28920039e+02 1.62e-04 8.88e-16 4.21e-03 0s 16 2.60649002e+02 2.30541705e+02 1.00e-04 9.60e-16 3.74e-03 0s 17 2.57950142e+02 2.40942532e+02 6.61e-05 6.72e-16 2.11e-03 0s 18 2.57108375e+02 2.44857855e+02 5.46e-05 8.07e-16 1.52e-03 0s 19 2.56272229e+02 2.48552820e+02 3.76e-05 8.88e-16 9.59e-04 0s 20 2.55992887e+02 2.51307408e+02 3.29e-05 6.55e-16 5.82e-04 0s 21 2.55125486e+02 2.53499981e+02 1.51e-05 7.30e-16 2.02e-04 0s 22 2.54455799e+02 2.54406047e+02 7.35e-08 6.27e-16 6.18e-06 0s 23 2.54450006e+02 2.54449955e+02 2.80e-12 7.21e-16 6.27e-09 0s 24 2.54450000e+02 2.54450000e+02 2.37e-12 6.06e-16 6.27e-12 0s Barrier solved model in 24 iterations and 0.08 seconds Optimal objective 2.54450000e+02 Root relaxation: objective 2.544500e+02, 3579 iterations, 0.12 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 254.45000 0 66 951.00000 254.45000 73.2% - 0s H 0 0 256.0000000 254.45000 0.61% - 0s H 0 0 255.0000000 254.45000 0.22% - 0s Explored 0 nodes (5051 simplex iterations) in 0.61 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 2.550000000000e+02, best bound 2.550000000000e+02, gap 0.0% Preprocessing time: 0.12 seconds Gurobi run time: 0.61 seconds Total run time: 0.73 seconds Objective: 255 Solution: 2 x [45, 45, 58] 5 x [23, 57, 69] 26 x [23, 29, 45] 3 x [19, 55, 64, 65, 69] 1 x [1, 19, 23, 45] 3 x [7, 24, 25, 45, 54, 70] 2 x [15, 23, 44, 54] 19 x [15, 18, 33, 80] 1 x [7, 15, 28, 41] 1 x [15, 19, 28, 35, 36] 1 x [8, 12, 37, 44] 4 x [12, 34, 75, 79] 6 x [12, 24, 28, 41] 3 x [12, 26, 39, 49, 67] 4 x [12, 21, 25, 30, 42, 54] 4 x [12, 12, 12, 54] 5 x [16, 34, 36, 73, 76] 1 x [16, 17, 19, 35, 40, 67, 73, 76] 9 x [41, 44, 60, 66] 4 x [1, 19, 30, 66, 72] 11 x [34, 44, 51, 79] 1 x [8, 37, 44] 7 x [10, 33, 41, 43, 63] 7 x [3, 20, 32, 73, 80] 9 x [1, 41, 43, 63, 74] 1 x [1, 41, 43, 53, 63] 4 x [10, 24, 30, 34, 46, 65, 79] 4 x [14, 19, 46, 51, 56, 71] 12 x [4, 51, 60, 71] 2 x [7, 19, 28, 36, 71] 1 x [5, 14, 19, 19, 28, 28, 71] 5 x [22, 27, 49, 60, 71] 4 x [13, 30, 38, 47, 51, 68] 1 x [16, 17, 19, 35, 40, 49, 51, 67] 1 x [11, 13, 30, 38, 47, 51, 62] 10 x [13, 31, 47, 50, 68] 1 x [13, 26, 31, 49, 54, 61] 1 x [11, 13, 31, 38, 47, 62, 74] 1 x [6, 28, 36, 41] 11 x [6, 20, 28, 36] 1 x [19, 19, 28, 36, 72, 73] 1 x [21, 25, 36, 37, 42, 48, 54] 12 x [27, 36, 37, 42, 48, 74] 2 x [25, 28, 42, 48, 54, 70, 74] 2 x [17, 28, 28, 35, 46, 61, 62] 3 x [3, 20, 34, 34, 64, 74] 1 x [3, 20, 59, 70, 73] 1 x [3, 20, 21, 25, 42, 43, 54] 11 x [3, 16, 17, 35, 70, 73, 77] 1 x [3, 16, 26, 30, 30, 64] 1 x [2, 3, 59, 67, 70, 74] 2 x [2, 14, 19, 19, 59, 63, 70, 74] 2 x [6, 10, 24, 43, 46, 65, 68] 6 x [7, 19, 26, 39, 52, 67, 78] 2 x [3, 11, 21, 25, 30, 35, 38, 62] 3 x [16, 21, 35, 46, 60, 73, 74] 1 x [5, 14, 16, 21, 35, 46, 74] 4 x [9, 21, 25, 35, 38, 43, 53] 1 x [10, 24, 43, 43, 46, 53, 63, 65]