Build (method = -2) #dp: 3750 Step-3' Graph: 94 vertices and 1578 arcs (0.01s) Step-4' Graph: 86 vertices and 1562 arcs (0.01s) #V4/#V3 = 0.91 #A4/#A3 = 0.99 Ready! (0.01s) Optimize a model with 157 rows, 1563 columns and 4524 nonzeros Presolve removed 27 rows and 35 columns Presolve time: 0.02s Presolved: 130 rows, 1528 columns, 4429 nonzeros Variable types: 0 continuous, 1528 integer (47 binary) Found heuristic solution: objective 448.0000000 Optimize a model with 130 rows, 1528 columns and 4429 nonzeros Presolved: 130 rows, 1528 columns, 4429 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 2.363e+03 Factor NZ : 4.413e+03 Factor Ops : 2.079e+05 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 9.48698894e+03 -2.27163155e+04 1.32e+05 8.16e-02 1.05e+02 0s 1 2.57985163e+03 -7.21967453e+03 2.04e+04 6.66e-16 1.70e+01 0s 2 6.09049965e+02 -3.20450428e+03 1.40e+03 5.22e-15 2.03e+00 0s 3 4.16660730e+02 -1.31122725e+03 1.02e+02 1.55e-15 5.99e-01 0s 4 3.27131314e+02 -2.49009882e+02 1.74e+01 5.00e-16 1.91e-01 0s 5 2.74911675e+02 -3.53335543e+01 6.96e+00 5.69e-16 1.02e-01 0s 6 2.53031520e+02 7.46925746e+01 3.56e+00 4.37e-16 5.81e-02 0s 7 2.38349675e+02 1.63614959e+02 1.46e+00 5.18e-16 2.43e-02 0s 8 2.30805418e+02 2.04209065e+02 2.68e-01 4.71e-16 8.60e-03 0s 9 2.28104670e+02 2.15148925e+02 1.03e-01 5.55e-16 4.18e-03 0s 10 2.26831560e+02 2.20664581e+02 4.30e-02 5.24e-16 1.99e-03 0s 11 2.26554132e+02 2.22380731e+02 2.94e-02 6.43e-16 1.35e-03 0s 12 2.26003885e+02 2.24497732e+02 8.86e-03 5.91e-16 4.86e-04 0s 13 2.25927077e+02 2.25163197e+02 6.54e-03 5.57e-16 2.47e-04 0s 14 2.25867267e+02 2.25381001e+02 4.79e-03 6.57e-16 1.57e-04 0s 15 2.25783440e+02 2.25587151e+02 2.43e-03 5.55e-16 6.34e-05 0s 16 2.25721688e+02 2.25658247e+02 9.16e-04 5.71e-16 2.05e-05 0s 17 2.25699405e+02 2.25687869e+02 9.24e-05 6.05e-16 3.72e-06 0s 18 2.25692332e+02 2.25692207e+02 1.60e-11 4.85e-16 4.06e-08 0s 19 2.25692308e+02 2.25692308e+02 4.21e-11 6.63e-16 4.06e-11 0s Barrier solved model in 19 iterations and 0.03 seconds Optimal objective 2.25692308e+02 Root relaxation: objective 2.256923e+02, 318 iterations, 0.03 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 225.69231 0 29 448.00000 225.69231 49.6% - 0s H 0 0 229.0000000 225.69231 1.44% - 0s H 0 0 226.0000000 225.69231 0.14% - 0s Explored 0 nodes (493 simplex iterations) in 0.11 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 2.260000000000e+02, best bound 2.260000000000e+02, gap 0.0% Preprocessing time: 0.02 seconds Gurobi run time: 0.11 seconds Total run time: 0.13 seconds Objective: 226 Solution: 6 x [20, 71] 3 x [22, 70] 3 x [21, 70] 2 x [18, 70] 1 x [23, 69] 8 x [19, 69] 1 x [18, 69] 7 x [24, 68] 3 x [23, 68] 2 x [25, 67] 7 x [26, 66] 1 x [25, 66] 8 x [27, 65] 9 x [28, 64] 1 x [27, 64] 3 x [25, 63] 6 x [29, 62] 1 x [25, 62] 5 x [30, 61] 1 x [27, 61] 1 x [23, 61] 2 x [17, 61] 2 x [32, 60] 4 x [31, 60] 2 x [26, 60] 5 x [33, 59] 1 x [32, 59] 4 x [1, 3, 59] 7 x [34, 58] 2 x [2, 3, 58] 7 x [35, 57] 5 x [36, 56] 4 x [2, 5, 56] 9 x [37, 55] 7 x [38, 54] 2 x [3, 6, 54] 3 x [4, 5, 54] 8 x [39, 53] 5 x [40, 52] 3 x [5, 6, 52] 5 x [41, 51] 11 x [42, 50] 3 x [43, 49] 4 x [6, 8, 49] 6 x [44, 48] 1 x [7, 8, 48] 6 x [45, 47] 1 x [7, 9, 46] 5 x [46, 46] 2 x [9, 9, 45] 2 x [8, 12, 43] 2 x [10, 10, 43] 2 x [7, 15, 41] 1 x [8, 14, 41] 1 x [9, 11, 41] 1 x [11, 11, 41] 4 x [13, 15, 35] 3 x [14, 14, 35] 1 x [17, 17, 23] 1 x [15, 16, 21] 1 x [13, 18, 19] 1 x [6, 9, 11] 1 x [7, 8, 8, 11]