Build (method = -2) #dp: 3273 Step-3' Graph: 601 vertices and 1825 arcs (0.03s) Step-4' Graph: 156 vertices and 935 arcs (0.03s) #V4/#V3 = 0.26 #A4/#A3 = 0.51 Ready! (0.03s) Optimize a model with 216 rows, 936 columns and 2500 nonzeros Presolve removed 48 rows and 48 columns Presolve time: 0.02s Presolved: 168 rows, 888 columns, 2405 nonzeros Variable types: 0 continuous, 888 integer (684 binary) Found heuristic solution: objective 34.0000000 Optimize a model with 168 rows, 888 columns and 2405 nonzeros Presolved: 168 rows, 888 columns, 2405 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 1.340e+03 Factor NZ : 4.520e+03 Factor Ops : 1.504e+05 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 2.36115460e+03 -2.77641773e+03 5.71e+03 2.61e-01 1.49e+01 0s 1 4.18223815e+02 -9.85955250e+02 8.34e+02 5.55e-16 2.42e+00 0s 2 9.91224026e+01 -2.12988013e+02 1.14e+02 4.44e-16 3.67e-01 0s 3 4.38744771e+01 -4.01426846e+01 2.04e+01 3.05e-16 7.64e-02 0s 4 3.23198479e+01 6.59452647e+00 4.17e+00 3.19e-16 1.81e-02 0s 5 2.91262482e+01 1.77006101e+01 9.87e-01 2.22e-16 6.95e-03 0s 6 2.83292254e+01 2.09226090e+01 5.93e-01 2.12e-16 4.43e-03 0s 7 2.76680880e+01 2.28771804e+01 3.40e-01 1.62e-16 2.84e-03 0s 8 2.71441906e+01 2.56700428e+01 6.67e-02 2.22e-16 8.54e-04 0s 9 2.70072622e+01 2.69612603e+01 6.04e-04 3.33e-16 2.61e-05 0s 10 2.70000077e+01 2.69999613e+01 3.73e-14 2.73e-16 2.62e-08 0s 11 2.70000000e+01 2.70000000e+01 3.40e-14 3.33e-16 2.62e-11 0s 12 2.70000000e+01 2.70000000e+01 2.06e-14 3.33e-16 2.62e-14 0s Barrier solved model in 12 iterations and 0.01 seconds Optimal objective 2.70000000e+01 Root relaxation: objective 2.700000e+01, 483 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 27.0000000 27.00000 0.0% - 0s Explored 0 nodes (483 simplex iterations) in 0.04 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 2.700000000000e+01, best bound 2.700000000000e+01, gap 0.0% Preprocessing time: 0.04 seconds Gurobi run time: 0.04 seconds Total run time: 0.08 seconds Objective: 27 Solution: 1 x [4, 48] 1 x [11, 47] 1 x [9, 33] 1 x [3, 51] 1 x [18] 1 x [21, 24, 26] 1 x [28, 52] 1 x [41, 55] 1 x [36] 1 x [34, 56] 1 x [5, 27] 1 x [14, 37] 1 x [15, 42, 46] 1 x [1, 25] 1 x [16, 17, 44] 1 x [30] 1 x [19, 39, 50] 1 x [2, 13, 53] 1 x [22, 60] 1 x [10, 32] 1 x [31, 38] 1 x [7, 40] 1 x [20, 29, 59] 1 x [8, 45, 54] 1 x [23, 57, 58] 1 x [12, 49] 1 x [6, 35, 43]