Build (method = -2) #dp: 3774 Step-3' Graph: 87 vertices and 1565 arcs (0.01s) Step-4' Graph: 87 vertices and 1565 arcs (0.02s) #V4/#V3 = 1.00 #A4/#A3 = 1.00 Ready! (0.02s) Optimize a model with 158 rows, 1566 columns and 4532 nonzeros Presolve removed 27 rows and 35 columns Presolve time: 0.02s Presolved: 131 rows, 1531 columns, 4437 nonzeros Variable types: 0 continuous, 1531 integer (0 binary) Found heuristic solution: objective 499.0000000 Found heuristic solution: objective 450.0000000 Optimize a model with 131 rows, 1531 columns and 4437 nonzeros Presolved: 131 rows, 1531 columns, 4437 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 2.374e+03 Factor NZ : 4.530e+03 Factor Ops : 2.156e+05 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 6.43583907e+03 -2.56730550e+04 8.13e+04 2.22e-16 6.94e+01 0s 1 2.03345956e+03 -8.38295163e+03 1.50e+04 3.50e-14 1.36e+01 0s 2 5.90114387e+02 -3.24319666e+03 1.17e+03 1.96e-14 1.89e+00 0s 3 4.18875637e+02 -1.09086516e+03 7.49e+01 1.91e-14 5.14e-01 0s 4 3.30539588e+02 -1.02615799e+02 1.99e+01 2.21e-14 1.44e-01 0s 5 2.74350224e+02 2.03322664e+01 8.44e+00 1.95e-14 8.34e-02 0s 6 2.56422148e+02 9.26423757e+01 5.34e+00 2.12e-14 5.36e-02 0s 7 2.42138714e+02 1.64703692e+02 3.36e+00 2.29e-14 2.53e-02 0s 8 2.29229018e+02 1.96571548e+02 6.68e-01 2.49e-14 1.06e-02 0s 9 2.25129818e+02 2.11049085e+02 2.52e-01 2.27e-14 4.55e-03 0s 10 2.22679178e+02 2.14462644e+02 3.58e-02 2.35e-14 2.65e-03 0s 11 2.22089952e+02 2.20146690e+02 7.31e-03 1.80e-14 6.26e-04 0s 12 2.21826726e+02 2.20992934e+02 2.62e-03 2.31e-14 2.68e-04 0s 13 2.21707751e+02 2.21511264e+02 5.59e-04 1.98e-14 6.32e-05 0s 14 2.21655142e+02 2.21643438e+02 5.26e-05 2.10e-14 3.77e-06 0s 15 2.21649127e+02 2.21649115e+02 3.62e-08 2.61e-14 4.03e-09 0s 16 2.21649123e+02 2.21649123e+02 2.90e-12 1.48e-14 4.12e-15 0s Barrier solved model in 16 iterations and 0.02 seconds Optimal objective 2.21649123e+02 Root relaxation: objective 2.216491e+02, 255 iterations, 0.02 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 221.64912 0 36 450.00000 221.64912 50.7% - 0s H 0 0 223.0000000 221.64912 0.61% - 0s H 0 0 222.0000000 221.64912 0.16% - 0s Explored 0 nodes (407 simplex iterations) in 0.10 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 2.220000000000e+02, best bound 2.220000000000e+02, gap 0.0% Preprocessing time: 0.03 seconds Gurobi run time: 0.10 seconds Total run time: 0.13 seconds Objective: 222 Solution: 3 x [19, 71] 7 x [21, 70] 2 x [19, 70] 1 x [18, 70] 9 x [22, 69] 5 x [20, 69] 6 x [23, 68] 4 x [25, 67] 2 x [23, 67] 1 x [18, 67] 3 x [26, 66] 6 x [27, 65] 1 x [26, 65] 1 x [26, 64] 8 x [24, 64] 3 x [28, 63] 2 x [26, 63] 6 x [30, 62] 6 x [29, 62] 8 x [31, 61] 8 x [32, 60] 1 x [1, 2, 60] 6 x [33, 59] 4 x [1, 3, 59] 5 x [34, 58] 5 x [35, 57] 2 x [1, 5, 57] 2 x [2, 4, 57] 5 x [36, 56] 8 x [37, 55] 7 x [38, 54] 1 x [4, 5, 54] 4 x [39, 53] 5 x [40, 52] 1 x [5, 6, 52] 9 x [41, 51] 5 x [42, 50] 5 x [43, 49] 2 x [44, 48] 1 x [4, 11, 48] 2 x [5, 10, 48] 2 x [6, 9, 48] 4 x [45, 47] 2 x [4, 12, 47] 3 x [7, 9, 47] 4 x [46, 46] 2 x [2, 17, 44] 1 x [6, 14, 43] 1 x [7, 13, 43] 4 x [8, 12, 43] 1 x [9, 11, 43] 3 x [10, 11, 42] 1 x [11, 13, 39] 2 x [12, 12, 39] 1 x [10, 39] 2 x [13, 13, 37] 2 x [10, 17, 36] 1 x [8, 16, 36] 1 x [13, 14, 36] 2 x [12, 17, 34] 4 x [14, 16, 33] 2 x [14, 18, 31] 1 x [16, 16, 31] 1 x [15, 18, 20] 2 x [18, 20, 20] 1 x [6, 6, 7, 15]