Build (method = -2) #dp: 69660 Step-3' Graph: 552 vertices and 9109 arcs (0.42s) Step-4' Graph: 497 vertices and 8999 arcs (0.43s) #V4/#V3 = 0.90 #A4/#A3 = 0.99 Ready! (0.43s) Optimize a model with 557 rows, 9000 columns and 26016 nonzeros Presolve removed 12 rows and 24 columns Presolve time: 0.13s Presolved: 545 rows, 8976 columns, 25971 nonzeros Variable types: 0 continuous, 8976 integer (96 binary) Found heuristic solution: objective 2546.0000000 Found heuristic solution: objective 2506.0000000 Optimize a model with 545 rows, 8976 columns and 25971 nonzeros Presolved: 545 rows, 8976 columns, 25971 nonzeros Root barrier log... Ordering time: 0.01s Barrier statistics: AA' NZ : 1.703e+04 Factor NZ : 4.846e+04 (roughly 4 MBytes of memory) Factor Ops : 5.716e+06 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 1.47440246e+05 -1.43797600e+06 1.48e+06 9.98e-02 1.55e+03 0s 1 4.03030816e+04 -5.62458442e+05 2.62e+05 2.66e-15 2.84e+02 0s 2 1.12523896e+04 -2.70196142e+05 5.33e+04 1.35e-14 6.43e+01 0s 3 4.50864913e+03 -1.14015711e+05 9.00e+03 1.78e-14 1.37e+01 0s 4 3.05497025e+03 -6.41714182e+04 1.75e+03 1.15e-14 4.92e+00 0s 5 2.62412995e+03 -3.71273192e+04 2.32e+02 6.22e-15 2.33e+00 0s 6 2.62152088e+03 -1.76161180e+04 1.72e+02 2.44e-15 1.18e+00 0s 7 2.34710100e+03 -1.03137332e+04 3.99e+01 1.50e-15 7.13e-01 0s 8 1.82237197e+03 -9.71201801e+03 2.56e+01 1.75e-15 6.47e-01 0s 9 1.18671013e+03 -3.60487133e+03 1.25e+01 1.32e-15 2.69e-01 0s 10 7.82227943e+02 -1.65449657e+03 6.83e+00 1.27e-15 1.37e-01 0s 11 5.67557367e+02 -8.02204214e+02 2.91e+00 1.41e-15 7.65e-02 0s 12 5.13022283e+02 -2.55717012e+02 1.95e+00 1.64e-15 4.29e-02 0s 13 4.73980523e+02 6.52706287e+01 1.10e+00 1.33e-15 2.28e-02 0s 14 4.60048926e+02 2.67869686e+02 8.75e-01 1.46e-15 1.07e-02 0s 15 4.46272854e+02 3.17770163e+02 6.20e-01 1.43e-15 7.16e-03 0s 16 4.29642995e+02 3.83390995e+02 2.90e-01 1.05e-15 2.57e-03 0s 17 4.20644656e+02 4.01736140e+02 8.86e-02 1.31e-15 1.05e-03 0s 18 4.19476342e+02 4.07557576e+02 6.97e-02 1.59e-15 6.63e-04 0s 19 4.17950680e+02 4.10469604e+02 4.51e-02 1.26e-15 4.16e-04 0s 20 4.16331513e+02 4.12888230e+02 1.79e-02 1.23e-15 1.91e-04 0s 21 4.15695445e+02 4.14081715e+02 6.98e-03 1.39e-15 8.97e-05 0s 22 4.15511410e+02 4.14879411e+02 3.82e-03 1.35e-15 3.51e-05 0s 23 4.15291053e+02 4.15284723e+02 2.83e-13 1.06e-15 3.51e-07 0s 24 4.15290000e+02 4.15289999e+02 2.74e-12 1.60e-15 4.19e-11 0s Barrier solved model in 24 iterations and 0.27 seconds Optimal objective 4.15290000e+02 Root relaxation: objective 4.152900e+02, 7171 iterations, 0.48 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 415.29000 0 100 2506.00000 415.29000 83.4% - 2s H 0 0 416.0000000 415.29000 0.17% - 2s Explored 0 nodes (16424 simplex iterations) in 2.72 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 4.160000000000e+02, best bound 4.160000000000e+02, gap 0.0% Preprocessing time: 0.46 seconds Gurobi run time: 2.72 seconds Total run time: 3.18 seconds Objective: 416 Solution: 4 x [11, 19, 32, 35, 49, 53] 14 x [17, 18, 19, 23, 35, 44, 53] 10 x [5, 19, 35, 39, 44, 53] 1 x [11, 14, 14, 19, 35, 53] 3 x [19, 21, 31, 35, 44, 53] 10 x [18, 19, 31, 35, 44, 53, 54] 1 x [3, 11, 22, 26, 39, 53] 1 x [3, 11, 22, 26, 53] 2 x [23, 31, 32, 36, 40, 53] 1 x [23, 31, 36, 40, 53] 11 x [1, 14, 18, 23, 32, 40, 53] 4 x [14, 19, 24, 35, 39, 49, 56] 1 x [18, 19, 24, 31, 35, 49] 6 x [1, 10, 14, 18, 19, 24, 31] 2 x [11, 23, 24, 26, 33, 55] 6 x [14, 23, 23, 24, 40, 52] 1 x [14, 23, 23, 24, 40, 50] 2 x [10, 15, 24, 24, 31, 34, 42] 1 x [3, 25, 26, 51] 5 x [14, 25, 26, 39, 48, 51] 14 x [2, 25, 35, 51] 13 x [11, 13, 25, 48, 51, 51] 1 x [6, 11, 23, 25, 33] 1 x [1, 5, 6, 21, 23, 25] 23 x [5, 6, 23, 25, 32, 34, 42] 19 x [9, 35, 45, 51] 15 x [3, 4, 11, 39, 45, 58] 3 x [1, 26, 27, 39, 45, 47, 56] 3 x [12, 21, 26, 27, 45, 47] 1 x [5, 26, 27, 34, 38, 45, 47] 13 x [10, 26, 26, 31, 34, 42, 45] 32 x [11, 13, 37, 45, 47, 57, 59] 6 x [1, 15, 17, 20, 43, 45, 47] 1 x [1, 15, 15, 43, 45, 47] 12 x [4, 6, 26, 59] 9 x [6, 12, 21, 27, 29, 47] 14 x [6, 6, 7, 18, 30, 32, 57] 6 x [6, 6, 6, 14, 39, 48] 2 x [3, 4, 16, 48, 55, 60] 3 x [3, 4, 14, 16, 31, 60] 1 x [3, 4, 16, 21, 60] 2 x [1, 15, 15, 16, 43, 59] 2 x [1, 15, 15, 16, 17, 43, 59] 19 x [4, 9, 10, 28, 31, 34, 42] 11 x [3, 4, 9, 13, 21, 60] 21 x [4, 31, 32, 36, 41, 58] 1 x [3, 4, 13, 21, 60] 7 x [1, 1, 4, 42, 44, 46, 50] 2 x [1, 1, 4, 35, 42, 44, 50] 3 x [2, 26, 29, 58] 11 x [15, 23, 23, 29, 52, 58] 15 x [11, 13, 26, 29, 33, 47, 57] 8 x [1, 5, 21, 26, 29, 47] 4 x [2, 3, 29, 31, 32, 36] 5 x [14, 14, 15, 17, 29, 59, 59] 1 x [5, 11, 11, 29, 59, 59, 59] 21 x [1, 5, 8, 15, 15, 29, 55] 5 x [5, 8, 15, 35, 37, 50, 55]