Build (method = -2) #dp: 1563 Step-3' Graph: 61 vertices and 203 arcs (0.00s) Step-4' Graph: 27 vertices and 135 arcs (0.00s) #V4/#V3 = 0.44 #A4/#A3 = 0.67 Ready! (0.00s) Optimize a model with 85 rows, 136 columns and 358 nonzeros Presolve removed 52 rows and 62 columns Presolve time: 0.00s Presolved: 33 rows, 74 columns, 183 nonzeros Variable types: 0 continuous, 74 integer (13 binary) Found heuristic solution: objective 80.0000000 Found heuristic solution: objective 76.0000000 Found heuristic solution: objective 58.0000000 Optimize a model with 33 rows, 74 columns and 183 nonzeros Presolved: 33 rows, 74 columns, 183 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 6.300e+01 Factor NZ : 3.210e+02 Factor Ops : 3.889e+03 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 1.27464170e+03 -8.83289283e+02 6.20e+01 2.22e-16 3.84e+01 0s 1 2.88865667e+02 -2.75825485e+02 1.09e+01 4.44e-16 5.72e+00 0s 2 8.40213413e+01 1.98531563e+00 1.48e-01 3.75e-14 5.30e-01 0s 3 6.21298250e+01 3.53242093e+01 4.69e-04 1.30e-14 1.67e-01 0s 4 5.42931168e+01 5.07197105e+01 2.51e-05 6.66e-16 2.22e-02 0s 5 5.30723191e+01 5.27206314e+01 2.91e-06 2.22e-16 2.18e-03 0s 6 5.30042070e+01 5.29967895e+01 1.61e-08 1.13e-16 4.61e-05 0s 7 5.30000000e+01 5.29999999e+01 5.07e-12 2.22e-16 8.90e-10 0s 8 5.30000000e+01 5.30000000e+01 9.55e-12 2.22e-16 8.90e-13 0s Barrier solved model in 8 iterations and 0.00 seconds Optimal objective 5.30000000e+01 Root relaxation: objective 5.300000e+01, 31 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 53.0000000 53.00000 0.0% - 0s Explored 0 nodes (31 simplex iterations) in 0.00 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 5.300000000000e+01, best bound 5.300000000000e+01, gap 0.0% Preprocessing time: 0.01 seconds Gurobi run time: 0.00 seconds Total run time: 0.02 seconds Objective: 53 Solution: 1 x [1, 58] 1 x [57] 5 x [56] 1 x [2, 55] 1 x [3, 54] 1 x [4, 53] 1 x [5, 52] 1 x [5, 51] 1 x [7, 50] 2 x [8, 49] 1 x [9, 48] 1 x [10, 47] 1 x [12, 46] 1 x [12, 45] 1 x [6, 44] 2 x [13, 43] 1 x [14, 42] 1 x [6, 42] 4 x [11, 41] 1 x [17, 40] 3 x [15, 40] 1 x [20, 39] 1 x [22, 38] 2 x [19, 38] 2 x [18, 37] 1 x [24, 36] 2 x [23, 36] 2 x [16, 35] 1 x [21, 34] 1 x [26, 33] 4 x [25, 32] 1 x [27, 31] 1 x [26, 30] 1 x [26, 29] 1 x [27, 28]