Build (method = -2) #dp: 334 Step-3' Graph: 86 vertices and 251 arcs (0.00s) Step-4' Graph: 14 vertices and 107 arcs (0.00s) #V4/#V3 = 0.16 #A4/#A3 = 0.43 Ready! (0.00s) Optimize a model with 74 rows, 108 columns and 300 nonzeros Presolve removed 55 rows and 58 columns Presolve time: 0.00s Presolved: 19 rows, 50 columns, 130 nonzeros Variable types: 0 continuous, 50 integer (0 binary) Found heuristic solution: objective 2476.0000000 Found heuristic solution: objective 2368.0000000 Optimize a model with 19 rows, 50 columns and 130 nonzeros Presolved: 19 rows, 50 columns, 130 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 7.200e+01 Factor NZ : 1.900e+02 Factor Ops : 2.470e+03 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 3.55661071e+03 -5.66228669e+02 2.49e+03 1.11e-16 1.23e+02 0s 1 2.62728341e+03 1.23728383e+03 9.11e+01 2.22e-16 1.51e+01 0s 2 2.42093899e+03 1.89519235e+03 6.78e+00 2.22e-16 4.99e+00 0s 3 2.33562814e+03 2.25410606e+03 3.63e-03 2.22e-16 7.62e-01 0s 4 2.30691964e+03 2.29652092e+03 4.88e-04 8.33e-17 9.72e-02 0s 5 2.30295407e+03 2.30224046e+03 5.29e-05 2.22e-16 6.67e-03 0s 6 2.30250027e+03 2.30249973e+03 1.96e-08 2.22e-16 5.00e-06 0s 7 2.30250000e+03 2.30250000e+03 4.41e-13 1.11e-16 5.01e-12 0s Barrier solved model in 7 iterations and 0.00 seconds Optimal objective 2.30250000e+03 Root relaxation: objective 2.302500e+03, 22 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2302.50000 0 10 2368.00000 2302.50000 2.77% - 0s H 0 0 2304.0000000 2302.50000 0.07% - 0s H 0 0 2303.0000000 2302.50000 0.02% - 0s Explored 0 nodes (30 simplex iterations) in 0.00 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 2.303000000000e+03, best bound 2.303000000000e+03, gap 0.0% Preprocessing time: 0.01 seconds Gurobi run time: 0.00 seconds Total run time: 0.01 seconds Objective: 2303 Solution: 11 x [31] 24 x [37] 75 x [1] 82 x [55] 31 x [52] 34 x [40] 51 x [58] 84 x [25] 35 x [4] 44 x [43] 40 x [28] 36 x [16] 81 x [19] 4 x [51] 39 x [34] 46 x [9] 20 x [49] 69 x [21] 2 x [36] 56 x [48] 28 x [10, 22] 27 x [22, 46] 36 x [18] 20 x [7, 13] 2 x [13, 46] 63 x [27] 5 x [6] 43 x [35] 83 x [47] 28 x [2, 10] 46 x [60] 22 x [42] 43 x [59] 45 x [50] 6 x [15] 78 x [17] 35 x [8] 30 x [12] 43 x [24] 8 x [57] 46 x [5] 35 x [54] 62 x [26] 85 x [29] 87 x [20] 34 x [41] 33 x [14] 9 x [3] 43 x [56] 96 x [33] 8 x [39] 24 x [11] 84 x [23] 5 x [32] 19 x [7, 45] 28 x [7, 44, 45] 8 x [7, 38, 45] 14 x [30, 46, 53] 3 x [45, 46, 53] 1 x [38, 45, 46] 1 x [46, 53] 23 x [30, 45, 53]