Build (method = -2) #dp: 2697 Step-3' Graph: 442 vertices and 1319 arcs (0.02s) Step-4' Graph: 142 vertices and 719 arcs (0.03s) #V4/#V3 = 0.32 #A4/#A3 = 0.55 Ready! (0.03s) Optimize a model with 202 rows, 720 columns and 1880 nonzeros Presolve removed 51 rows and 52 columns Presolve time: 0.01s Presolved: 151 rows, 668 columns, 1758 nonzeros Variable types: 0 continuous, 668 integer (473 binary) Found heuristic solution: objective 47.0000000 Optimize a model with 151 rows, 668 columns and 1758 nonzeros Presolved: 151 rows, 668 columns, 1758 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 9.990e+02 Factor NZ : 3.476e+03 Factor Ops : 9.638e+04 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 1.85732510e+03 -1.58496355e+03 4.75e+03 2.21e-01 1.59e+01 0s 1 3.46112259e+02 -7.09447599e+02 7.97e+02 4.44e-16 2.89e+00 0s 2 8.56885555e+01 -2.16375572e+02 8.08e+01 4.44e-16 4.06e-01 0s 3 4.57843433e+01 -3.35256371e+01 1.64e+01 3.61e-16 8.93e-02 0s 4 3.74698224e+01 1.50057696e+01 3.94e+00 4.16e-16 2.10e-02 0s 5 3.64161494e+01 2.84516414e+01 1.44e+00 4.44e-16 6.88e-03 0s 6 3.60481048e+01 3.51862826e+01 1.83e-01 4.44e-16 7.03e-04 0s 7 3.60001483e+01 3.59978546e+01 2.75e-14 5.55e-16 1.72e-06 0s 8 3.60000001e+01 3.59999979e+01 2.13e-14 4.44e-16 1.72e-09 0s 9 3.60000000e+01 3.60000000e+01 1.42e-14 4.44e-16 1.74e-15 0s Barrier solved model in 9 iterations and 0.01 seconds Optimal objective 3.60000000e+01 Root relaxation: objective 3.600000e+01, 438 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 36.0000000 36.00000 0.0% - 0s Explored 0 nodes (438 simplex iterations) in 0.03 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 3.600000000000e+01, best bound 3.600000000000e+01, gap 0.0% Preprocessing time: 0.04 seconds Gurobi run time: 0.03 seconds Total run time: 0.06 seconds Objective: 36 Solution: 1 x [6] 1 x [45] 1 x [26] 1 x [52] 1 x [55] 1 x [28] 1 x [18] 1 x [11, 40] 1 x [34] 1 x [31] 1 x [7] 1 x [46, 58] 1 x [36] 1 x [19, 24, 56] 1 x [20, 29, 43] 1 x [1, 2, 32] 1 x [5, 44] 1 x [16, 47] 1 x [50] 1 x [10] 1 x [30, 33] 1 x [37, 53] 1 x [25, 57] 1 x [8, 23] 1 x [4, 14] 1 x [22] 1 x [27, 42] 1 x [54] 1 x [21, 41] 1 x [12, 39] 1 x [9, 15] 1 x [3, 51] 1 x [38, 60] 1 x [13, 59] 1 x [35, 49] 1 x [17, 48]