Build (method = -2) #dp: 9046 Step-3' Graph: 136 vertices and 3565 arcs (0.04s) Step-4' Graph: 134 vertices and 3561 arcs (0.04s) #V4/#V3 = 0.99 #A4/#A3 = 1.00 Ready! (0.04s) Optimize a model with 217 rows, 3562 columns and 10424 nonzeros Presolve removed 29 rows and 30 columns Presolve time: 0.05s Presolved: 188 rows, 3532 columns, 10353 nonzeros Variable types: 0 continuous, 3532 integer (985 binary) Found heuristic solution: objective 163.0000000 Found heuristic solution: objective 147.0000000 Optimize a model with 188 rows, 3532 columns and 10353 nonzeros Presolved: 188 rows, 3532 columns, 10353 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 8.130e+03 Factor NZ : 1.244e+04 (roughly 2 MBytes of memory) Factor Ops : 1.102e+06 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 7.06726338e+03 -1.97407804e+04 1.26e+04 1.30e-01 6.28e+01 0s 1 2.03060770e+03 -1.03492939e+04 2.29e+03 6.66e-16 1.22e+01 0s 2 5.19574020e+02 -4.32751645e+03 2.74e+02 1.11e-15 1.83e+00 0s 3 2.68453625e+02 -1.28819259e+03 2.67e+01 8.88e-16 2.96e-01 0s 4 1.79188199e+02 -2.71814939e+02 5.52e+00 4.44e-16 7.38e-02 0s 5 1.49316124e+02 -1.02692904e+02 3.58e+00 2.67e-16 4.06e-02 0s 6 1.20496502e+02 -3.83852750e+01 2.07e+00 2.32e-16 2.49e-02 0s 7 1.02374454e+02 4.28002591e+00 1.23e+00 2.22e-16 1.51e-02 0s 8 8.57659331e+01 3.35182286e+01 5.88e-01 2.22e-16 7.82e-03 0s 9 7.88929795e+01 5.88982758e+01 2.50e-01 2.38e-16 2.93e-03 0s 10 7.76109787e+01 6.32068954e+01 1.92e-01 2.22e-16 2.10e-03 0s 11 7.50286042e+01 6.61419047e+01 1.06e-01 1.70e-16 1.28e-03 0s 12 7.42368545e+01 6.84900869e+01 7.22e-02 2.22e-16 8.26e-04 0s 13 7.36283946e+01 6.94243700e+01 4.69e-02 2.43e-16 6.01e-04 0s 14 7.31559898e+01 7.13484740e+01 2.43e-02 2.22e-16 2.57e-04 0s 15 7.30813740e+01 7.17096521e+01 2.12e-02 2.22e-16 1.95e-04 0s 16 7.27636218e+01 7.20382617e+01 7.42e-03 2.22e-16 1.03e-04 0s 17 7.27267741e+01 7.21519014e+01 6.34e-03 2.22e-16 8.13e-05 0s 18 7.26771569e+01 7.23408288e+01 4.18e-03 3.33e-16 4.75e-05 0s 19 7.26456435e+01 7.24305138e+01 2.81e-03 2.77e-16 3.04e-05 0s 20 7.26104363e+01 7.25999040e+01 3.01e-05 3.33e-16 1.48e-06 0s 21 7.26066709e+01 7.26059737e+01 4.81e-08 3.33e-16 9.81e-08 0s 22 7.26066667e+01 7.26066667e+01 7.67e-13 2.46e-16 2.13e-13 0s Barrier solved model in 22 iterations and 0.07 seconds Optimal objective 7.26066667e+01 Root relaxation: objective 7.260667e+01, 3117 iterations, 0.12 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 72.60667 0 50 147.00000 72.60667 50.6% - 0s H 0 0 74.0000000 72.60667 1.88% - 0s H 0 0 73.0000000 72.60667 0.54% - 0s Explored 0 nodes (5180 simplex iterations) in 0.60 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 7.300000000000e+01, best bound 7.300000000000e+01, gap 0.0% Preprocessing time: 0.07 seconds Gurobi run time: 0.60 seconds Total run time: 0.67 seconds Objective: 73 Solution: 1 x [39, 83] 2 x [17, 20, 82] 4 x [41, 81] 1 x [9, 29, 81] 4 x [42, 80] 3 x [44, 79] 1 x [45, 78] 1 x [16, 24, 78] 1 x [10, 33, 77] 2 x [47, 76] 3 x [48, 75] 3 x [49, 74] 1 x [50, 73] 1 x [51, 72] 1 x [7, 11, 19, 72] 1 x [52, 71] 1 x [18, 28, 71] 2 x [21, 25, 70] 2 x [54, 69] 2 x [1, 53, 69] 2 x [15, 35, 68] 1 x [24, 24, 68] 1 x [8, 46, 67] 1 x [12, 42, 66] 1 x [57, 65] 1 x [1, 55, 65] 3 x [58, 64] 1 x [2, 56, 64] 1 x [59, 63] 1 x [3, 55, 63] 1 x [5, 53, 63] 2 x [25, 26, 63] 1 x [7, 8, 18, 19, 63] 1 x [4, 55, 62] 1 x [25, 28, 61] 2 x [18, 40, 60] 1 x [3, 31, 56] 2 x [15, 50, 53] 1 x [22, 42, 53] 2 x [30, 32, 53] 1 x [29, 40, 47] 1 x [9, 24, 34, 46] 1 x [6, 9, 12, 14, 28, 43] 1 x [36, 38, 42] 1 x [37, 38, 41] 1 x [4, 26, 34, 39] 2 x [13, 27, 33, 39] 1 x [4, 19, 23, 29, 34]