Build (method = -2) #dp: 1053 Step-3' Graph: 51 vertices and 180 arcs (0.00s) Step-4' Graph: 21 vertices and 120 arcs (0.00s) #V4/#V3 = 0.41 #A4/#A3 = 0.67 Ready! (0.00s) Optimize a model with 81 rows, 121 columns and 325 nonzeros Presolve removed 54 rows and 58 columns Presolve time: 0.00s Presolved: 27 rows, 63 columns, 154 nonzeros Variable types: 0 continuous, 63 integer (12 binary) Found heuristic solution: objective 86.0000000 Found heuristic solution: objective 77.0000000 Found heuristic solution: objective 65.0000000 Optimize a model with 27 rows, 63 columns and 154 nonzeros Presolved: 27 rows, 63 columns, 154 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 5.100e+01 Factor NZ : 2.280e+02 Factor Ops : 2.430e+03 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 7.91314656e+02 -6.39518548e+02 5.56e+01 2.22e-16 2.72e+01 0s 1 1.99828212e+02 -1.51123508e+02 6.16e+00 3.89e-16 3.80e+00 0s 2 8.44809009e+01 3.23621317e+01 2.13e-14 1.33e-15 3.83e-01 0s 3 6.84696438e+01 5.24406201e+01 1.05e-13 5.55e-16 1.18e-01 0s 4 6.40692164e+01 6.21599752e+01 1.38e-14 3.33e-16 1.40e-02 0s 5 6.35867206e+01 6.33497440e+01 9.33e-15 2.22e-16 1.74e-03 0s 6 6.35016743e+01 6.34989689e+01 4.79e-13 1.48e-16 1.99e-05 0s 7 6.35000000e+01 6.35000000e+01 4.28e-13 2.22e-16 1.33e-10 0s Barrier solved model in 7 iterations and 0.00 seconds Optimal objective 6.35000000e+01 Root relaxation: objective 6.350000e+01, 24 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 63.50000 0 2 65.00000 63.50000 2.31% - 0s H 0 0 64.0000000 63.50000 0.78% - 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 6.400000000000e+01, best bound 6.400000000000e+01, gap 0.0% Preprocessing time: 0.01 seconds Gurobi run time: 0.00 seconds Total run time: 0.01 seconds Objective: 64 Solution: 3 x [60] 2 x [59] 1 x [58] 1 x [57] 2 x [56] 1 x [55] 2 x [54] 1 x [53] 2 x [52] 1 x [51] 2 x [50] 2 x [49] 1 x [48] 1 x [47] 3 x [46] 1 x [45] 1 x [1, 44] 1 x [2, 43] 3 x [3, 42] 1 x [41] 1 x [6, 40] 2 x [5, 40] 1 x [7, 39] 1 x [4, 38] 1 x [9, 37] 1 x [8, 37] 1 x [11, 36] 1 x [12, 35] 2 x [13, 34] 1 x [12, 34] 1 x [14, 33] 2 x [15, 32] 1 x [17, 31] 1 x [20, 30] 2 x [21, 29] 2 x [21, 28] 3 x [22, 27] 2 x [23, 26] 1 x [24, 25] 1 x [16, 25] 1 x [17, 19] 2 x [17, 18] 1 x [10]