Build (method = -2) #dp: 1293 Step-3' Graph: 55 vertices and 190 arcs (0.00s) Step-4' Graph: 24 vertices and 128 arcs (0.00s) #V4/#V3 = 0.44 #A4/#A3 = 0.67 Ready! (0.00s) Optimize a model with 84 rows, 129 columns and 343 nonzeros Presolve removed 54 rows and 59 columns Presolve time: 0.00s Presolved: 30 rows, 70 columns, 172 nonzeros Variable types: 0 continuous, 70 integer (12 binary) Found heuristic solution: objective 78.0000000 Found heuristic solution: objective 71.0000000 Optimize a model with 30 rows, 70 columns and 172 nonzeros Presolved: 30 rows, 70 columns, 172 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 5.700e+01 Factor NZ : 2.850e+02 Factor Ops : 3.515e+03 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 1.01703081e+03 -7.27020607e+02 1.07e+02 2.22e-16 3.12e+01 0s 1 2.32225813e+02 -2.07718845e+02 1.18e+01 5.55e-16 4.40e+00 0s 2 8.70926804e+01 2.16699382e+01 2.79e-01 2.55e-15 4.51e-01 0s 3 7.02510119e+01 5.60430130e+01 1.50e-02 2.11e-15 9.48e-02 0s 4 6.22475344e+01 5.97536467e+01 2.51e-03 1.11e-15 1.66e-02 0s 5 6.19183111e+01 6.11735477e+01 5.73e-04 1.89e-15 4.96e-03 0s 6 6.15032663e+01 6.14685207e+01 2.56e-05 2.22e-15 2.31e-04 0s 7 6.15000004e+01 6.14999995e+01 2.91e-10 1.13e-15 6.27e-09 0s 8 6.15000000e+01 6.15000000e+01 9.33e-14 8.50e-16 6.27e-12 0s Barrier solved model in 8 iterations and 0.00 seconds Optimal objective 6.15000000e+01 Root relaxation: objective 6.150000e+01, 28 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 61.50000 0 2 71.00000 61.50000 13.4% - 0s H 0 0 62.0000000 61.50000 0.81% - 0s Explored 0 nodes (28 simplex iterations) in 0.00 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 6.200000000000e+01, best bound 6.200000000000e+01, gap 0.0% Preprocessing time: 0.01 seconds Gurobi run time: 0.00 seconds Total run time: 0.02 seconds Objective: 62 Solution: 1 x [60] 1 x [59] 2 x [58] 3 x [57] 3 x [56] 2 x [55] 2 x [54] 1 x [53] 2 x [52] 2 x [51] 2 x [50] 1 x [1, 49] 3 x [2, 48] 1 x [3, 47] 2 x [4, 46] 1 x [6, 45] 1 x [7, 44] 1 x [5, 44] 1 x [8, 43] 2 x [42] 2 x [9, 42] 1 x [3, 42] 1 x [12, 41] 1 x [11, 40] 3 x [13, 39] 1 x [10, 38] 2 x [15, 37] 1 x [16, 36] 2 x [14, 35] 2 x [19, 34] 1 x [20, 33] 2 x [22, 32] 1 x [21, 31] 1 x [24, 30] 2 x [24, 29] 1 x [18, 28] 1 x [17, 27] 1 x [25, 26] 1 x [22, 23] 1 x [18]