Build (method = -2) #dp: 320 Step-3' Graph: 99 vertices and 290 arcs (0.00s) Step-4' Graph: 30 vertices and 152 arcs (0.00s) #V4/#V3 = 0.30 #A4/#A3 = 0.52 Ready! (0.00s) Optimize a model with 90 rows, 153 columns and 403 nonzeros Presolve removed 57 rows and 57 columns Presolve time: 0.00s Presolved: 33 rows, 96 columns, 249 nonzeros Variable types: 0 continuous, 96 integer (62 binary) Found heuristic solution: objective 52.0000000 Optimize a model with 33 rows, 96 columns and 249 nonzeros Presolved: 33 rows, 96 columns, 249 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 1.330e+02 Factor NZ : 3.900e+02 Factor Ops : 5.540e+03 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 1.72318697e+02 -9.06136419e+01 1.54e+02 1.88e-01 4.99e+00 0s 1 6.80834791e+01 -9.30718168e+00 1.52e+01 3.33e-16 6.85e-01 0s 2 5.35680136e+01 3.78214260e+01 1.41e+00 4.44e-16 9.75e-02 0s 3 5.07836604e+01 4.58674514e+01 5.63e-02 2.64e-16 2.59e-02 0s 4 4.97556273e+01 4.79580801e+01 5.08e-03 2.36e-16 9.37e-03 0s 5 4.94088160e+01 4.89338110e+01 9.04e-04 2.71e-16 2.48e-03 0s 6 4.93456518e+01 4.93023523e+01 1.12e-04 1.55e-16 2.26e-04 0s 7 4.93335577e+01 4.93332282e+01 2.02e-06 3.78e-16 1.72e-06 0s 8 4.93333336e+01 4.93333332e+01 4.03e-13 6.66e-16 1.72e-09 0s 9 4.93333333e+01 4.93333333e+01 1.09e-13 3.46e-16 1.77e-15 0s Barrier solved model in 9 iterations and 0.00 seconds Optimal objective 4.93333333e+01 Root relaxation: objective 4.933333e+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 49.33333 0 12 52.00000 49.33333 5.13% - 0s H 0 0 50.0000000 49.33333 1.33% - 0s Explored 0 nodes (54 simplex iterations) in 0.01 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 5.000000000000e+01, best bound 5.000000000000e+01, gap 0.0% Preprocessing time: 0.01 seconds Gurobi run time: 0.01 seconds Total run time: 0.02 seconds Objective: 50 Solution: 1 x [10] 1 x [13] 1 x [19] 1 x [22] 1 x [43] 1 x [31] 1 x [28] 1 x [4] 1 x [34] 1 x [7] 1 x [58] 1 x [49] 1 x [42] 1 x [16] 1 x [39] 1 x [37] 1 x [18] 1 x [46] 1 x [40] 1 x [48] 1 x [52] 1 x [54] 1 x [36] 1 x [60] 1 x [6] 1 x [9] 1 x [27] 1 x [47] 1 x [30] 1 x [8] 1 x [33] 1 x [21] 1 x [59] 1 x [15] 1 x [41] 1 x [32] 1 x [38] 1 x [17] 1 x [24] 1 x [2] 1 x [5] 1 x [44] 1 x [26] 1 x [11] 1 x [14, 23, 29] 1 x [12, 20, 55] 1 x [25, 53, 56] 1 x [1, 45, 51] 1 x [35, 50, 57] 1 x [3]