Build (method = -2) #dp: 7374 Step-3' Graph: 287 vertices and 850 arcs (0.07s) Step-4' Graph: 85 vertices and 446 arcs (0.07s) #V4/#V3 = 0.30 #A4/#A3 = 0.52 Ready! (0.07s) Optimize a model with 127 rows, 447 columns and 1179 nonzeros Presolve removed 24 rows and 46 columns Presolve time: 0.00s Presolved: 103 rows, 401 columns, 1091 nonzeros Variable types: 0 continuous, 401 integer (65 binary) Found heuristic solution: objective 80.0000000 Optimize a model with 103 rows, 401 columns and 1091 nonzeros Presolved: 103 rows, 401 columns, 1091 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 4.940e+02 Factor NZ : 9.040e+02 Factor Ops : 9.948e+03 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 3.85881444e+02 -7.71032244e+02 3.77e+02 9.87e-02 5.05e+00 0s 1 8.71727285e+01 -3.94926669e+02 1.96e+01 1.33e-15 7.36e-01 0s 2 4.15242864e+01 -6.31240262e+01 2.22e-01 6.11e-16 1.28e-01 0s 3 2.23963352e+01 -2.16156670e+00 1.54e-02 1.07e-15 2.96e-02 0s 4 2.02539486e+01 1.92398517e+01 4.75e-13 1.23e-15 1.22e-03 0s 5 2.00008306e+01 1.99994797e+01 2.75e-14 9.23e-16 1.63e-06 0s 6 2.00000000e+01 2.00000000e+01 9.75e-14 8.88e-16 1.63e-12 0s Barrier solved model in 6 iterations and 0.00 seconds Optimal objective 2.00000000e+01 Root relaxation: objective 2.000000e+01, 278 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 20.0000000 20.00000 0.0% - 0s Explored 0 nodes (278 simplex iterations) in 0.01 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 2.000000000000e+01, best bound 2.000000000000e+01, gap 0.0% Preprocessing time: 0.08 seconds Gurobi run time: 0.01 seconds Total run time: 0.09 seconds Objective: 20 Solution: 2 x [5, 11, 29, 34, 42] 1 x [5, 26, 37, 37, 41] 1 x [1, 3, 5, 12, 41] 3 x [11, 16, 23, 25, 40] 1 x [9, 9, 30, 32, 39] 3 x [13, 19, 25, 27, 38] 2 x [1, 2, 15, 17, 38] 1 x [1, 4, 8, 24, 36] 1 x [4, 6, 13, 20, 35] 1 x [3, 12, 14, 30, 33] 1 x [7, 18, 18, 28, 31] 1 x [1, 3, 12, 22, 31] 2 x [6, 10, 15, 17, 21]