Build (method = -2) #dp: 1120 Step-3' Graph: 196 vertices and 581 arcs (0.01s) Step-4' Graph: 68 vertices and 325 arcs (0.01s) #V4/#V3 = 0.35 #A4/#A3 = 0.56 Ready! (0.01s) Optimize a model with 128 rows, 326 columns and 846 nonzeros Presolve removed 47 rows and 77 columns Presolve time: 0.00s Presolved: 81 rows, 249 columns, 657 nonzeros Variable types: 0 continuous, 249 integer (0 binary) Found heuristic solution: objective 2420.0000000 Found heuristic solution: objective 2414.0000000 Optimize a model with 81 rows, 249 columns and 657 nonzeros Presolved: 81 rows, 249 columns, 657 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 3.930e+02 Factor NZ : 1.371e+03 Factor Ops : 2.580e+04 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 1.58412768e+04 -2.17868802e+04 5.96e+04 2.22e-16 4.44e+02 0s 1 5.03468079e+03 -7.67683473e+03 7.30e+03 2.44e-15 6.43e+01 0s 2 2.72443734e+03 -6.95749988e+02 5.68e+02 1.31e-14 8.87e+00 0s 3 2.33445242e+03 7.96416740e+02 2.96e+01 5.11e-15 3.05e+00 0s 4 2.22664732e+03 1.58293172e+03 1.26e+00 1.44e-15 1.25e+00 0s 5 2.19156175e+03 1.96234357e+03 4.78e-01 8.67e-16 4.44e-01 0s 6 2.17820343e+03 2.15652860e+03 1.03e-01 1.43e-15 4.20e-02 0s 7 2.17600243e+03 2.17597988e+03 1.57e-04 1.21e-15 4.37e-05 0s 8 2.17600000e+03 2.17599998e+03 2.49e-13 9.99e-16 4.37e-08 0s 9 2.17600000e+03 2.17600000e+03 3.41e-13 8.82e-16 4.95e-14 0s Barrier solved model in 9 iterations and 0.00 seconds Optimal objective 2.17600000e+03 Root relaxation: objective 2.176000e+03, 154 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 2176.0000000 2176.00000 0.0% - 0s Explored 0 nodes (154 simplex iterations) in 0.01 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 2.176000000000e+03, best bound 2.176000000000e+03, gap 0.0% Preprocessing time: 0.02 seconds Gurobi run time: 0.01 seconds Total run time: 0.03 seconds Objective: 2176 Solution: 90 x [31] 11 x [7] 30 x [4] 61 x [46] 4 x [58] 72 x [1] 87 x [52] 43 x [18] 85 x [43] 48 x [54] 61 x [19] 35 x [30] 75 x [36] 53 x [3] 56 x [6] 40 x [2] 76 x [9] 100 x [20] 45 x [56] 31 x [41] 79 x [23] 89 x [50] 68 x [29] 9 x [29, 38] 20 x [10] 6 x [55] 14 x [14, 55] 32 x [27] 20 x [25, 27] 55 x [44] 74 x [59] 1 x [45] 10 x [16, 45] 2 x [8] 62 x [8, 53] 1 x [17] 62 x [17, 51] 1 x [37] 25 x [21, 37] 9 x [37, 47] 4 x [33] 3 x [24, 33] 9 x [22] 25 x [22, 40] 27 x [22, 34] 9 x [22, 28] 16 x [5] 17 x [5, 12] 33 x [39] 18 x [11, 39] 10 x [35, 49] 18 x [42, 49] 48 x [15] 18 x [13, 15] 5 x [11, 15] 2 x [15, 51] 7 x [60] 13 x [35] 34 x [32] 5 x [32, 40] 37 x [11, 25, 32] 2 x [48] 7 x [48, 57] 36 x [13, 26, 48] 31 x [11, 13, 48]