Build (method = -2) #dp: 665 Step-3' Graph: 150 vertices and 443 arcs (0.01s) Step-4' Graph: 55 vertices and 253 arcs (0.01s) #V4/#V3 = 0.37 #A4/#A3 = 0.57 Ready! (0.01s) Optimize a model with 115 rows, 254 columns and 656 nonzeros Presolve removed 62 rows and 67 columns Presolve time: 0.00s Presolved: 53 rows, 187 columns, 489 nonzeros Variable types: 0 continuous, 187 integer (135 binary) Found heuristic solution: objective 48.0000000 Optimize a model with 53 rows, 187 columns and 489 nonzeros Presolved: 53 rows, 187 columns, 489 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 2.490e+02 Factor NZ : 7.860e+02 Factor Ops : 1.344e+04 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 1.08131589e+02 -1.89224101e+02 3.39e+02 3.10e-01 4.72e+00 0s 1 6.25784763e+01 -7.14429804e+01 4.13e+01 1.11e-15 7.70e-01 0s 2 5.13957511e+01 1.34205828e+01 4.76e+00 9.99e-16 1.35e-01 0s 3 4.85511957e+01 4.13066907e+01 2.38e-01 1.78e-15 2.01e-02 0s 4 4.73447308e+01 4.36315710e+01 5.35e-02 1.78e-15 1.01e-02 0s 5 4.71188003e+01 4.61934338e+01 3.06e-02 6.66e-16 2.54e-03 0s 6 4.70025725e+01 4.69773040e+01 3.90e-04 2.22e-15 6.83e-05 0s 7 4.70000000e+01 4.69999999e+01 4.50e-09 8.70e-16 3.62e-10 0s 8 4.70000000e+01 4.70000000e+01 3.71e-15 1.55e-15 3.62e-13 0s Barrier solved model in 8 iterations and 0.00 seconds Optimal objective 4.70000000e+01 Root relaxation: objective 4.700000e+01, 105 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 47.0000000 47.00000 0.0% - 0s Explored 0 nodes (141 simplex iterations) in 0.01 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 4.700000000000e+01, best bound 4.700000000000e+01, gap 0.0% Preprocessing time: 0.01 seconds Gurobi run time: 0.01 seconds Total run time: 0.02 seconds Objective: 47 Solution: 1 x [1] 1 x [25] 1 x [49] 1 x [55] 1 x [46] 1 x [19] 1 x [43] 1 x [16] 1 x [34] 1 x [37] 1 x [24] 1 x [40] 1 x [18] 1 x [33] 1 x [6] 1 x [15] 1 x [58] 1 x [27, 52] 1 x [54] 1 x [45] 1 x [31] 1 x [30] 1 x [32] 1 x [20] 1 x [53] 1 x [29] 1 x [4, 14] 1 x [44] 1 x [48] 1 x [41] 1 x [28, 60] 1 x [5] 1 x [17] 1 x [51] 1 x [56] 1 x [3] 1 x [8] 1 x [23] 1 x [2] 1 x [38] 1 x [11, 42, 59] 1 x [9, 10, 47] 1 x [7, 26, 50] 1 x [35] 1 x [13] 1 x [12, 22, 36] 1 x [21, 39, 57]