Build (method = -2) #dp: 2159 Step-3' Graph: 63 vertices and 216 arcs (0.01s) Step-4' Graph: 27 vertices and 144 arcs (0.01s) #V4/#V3 = 0.43 #A4/#A3 = 0.67 Ready! (0.01s) Optimize a model with 92 rows, 145 columns and 385 nonzeros Presolve removed 55 rows and 56 columns Presolve time: 0.00s Presolved: 37 rows, 89 columns, 215 nonzeros Variable types: 0 continuous, 89 integer (17 binary) Found heuristic solution: objective 78.0000000 Found heuristic solution: objective 73.0000000 Found heuristic solution: objective 55.0000000 Optimize a model with 37 rows, 89 columns and 215 nonzeros Presolve removed 1 rows and 1 columns Presolved: 36 rows, 88 columns, 213 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 6.900e+01 Factor NZ : 3.810e+02 Factor Ops : 5.091e+03 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 2.09425210e+03 -2.41477180e+03 2.86e+02 2.22e-16 8.00e+01 0s 1 4.82998614e+02 -8.46059280e+02 4.15e+01 6.66e-16 1.30e+01 0s 2 1.04096527e+02 -9.67320722e+01 1.56e+00 7.82e-14 1.21e+00 0s 3 7.37892255e+01 1.74347877e+01 7.19e-03 2.44e-14 3.00e-01 0s 4 5.96598621e+01 4.79687394e+01 9.21e-15 1.78e-15 6.22e-02 0s 5 5.44620718e+01 4.97932637e+01 1.22e-14 8.88e-16 2.48e-02 0s 6 5.40469935e+01 5.17741592e+01 2.89e-14 5.55e-16 1.21e-02 0s 7 5.35402809e+01 5.34274607e+01 5.91e-14 8.88e-16 6.00e-04 0s 8 5.35000567e+01 5.34999170e+01 3.35e-13 4.44e-16 7.43e-07 0s 9 5.35000000e+01 5.35000000e+01 5.77e-14 3.33e-16 7.44e-13 0s Barrier solved model in 9 iterations and 0.00 seconds Optimal objective 5.35000000e+01 Root relaxation: objective 5.350000e+01, 37 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 53.50000 0 2 55.00000 53.50000 2.73% - 0s H 0 0 54.0000000 53.50000 0.93% - 0s Explored 0 nodes (37 simplex iterations) in 0.01 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 5.400000000000e+01, best bound 5.400000000000e+01, gap 0.0% Preprocessing time: 0.02 seconds Gurobi run time: 0.01 seconds Total run time: 0.03 seconds Objective: 54 Solution: 3 x [65] 1 x [2, 64] 1 x [63] 1 x [4, 62] 1 x [5, 61] 1 x [6, 60] 1 x [3, 59] 2 x [5, 58] 3 x [57] 1 x [7, 56] 1 x [8, 55] 1 x [1, 55] 1 x [54] 1 x [9, 53] 1 x [9, 52] 1 x [11, 51] 1 x [12, 50] 1 x [14, 49] 1 x [12, 48] 2 x [17, 47] 1 x [17, 46] 2 x [18, 45] 2 x [20, 44] 1 x [22, 43] 1 x [23, 42] 2 x [15, 41] 2 x [13, 40] 1 x [24, 39] 2 x [26, 38] 3 x [19, 38] 1 x [27, 37] 1 x [16, 37] 1 x [15, 36] 1 x [29, 35] 1 x [28, 34] 1 x [11, 33] 1 x [30, 32] 1 x [31, 31] 1 x [21, 25] 1 x [25, 25] 1 x [9, 10]