Build (method = -2) #dp: 8810 Step-3' Graph: 281 vertices and 832 arcs (0.09s) Step-4' Graph: 84 vertices and 438 arcs (0.09s) #V4/#V3 = 0.30 #A4/#A3 = 0.53 Ready! (0.09s) Optimize a model with 123 rows, 439 columns and 1157 nonzeros Presolve removed 19 rows and 36 columns Presolve time: 0.00s Presolved: 104 rows, 403 columns, 1089 nonzeros Variable types: 0 continuous, 403 integer (49 binary) Found heuristic solution: objective 88.0000000 Found heuristic solution: objective 65.0000000 Optimize a model with 104 rows, 403 columns and 1089 nonzeros Presolved: 104 rows, 403 columns, 1089 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 5.000e+02 Factor NZ : 9.510e+02 Factor Ops : 1.029e+04 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 4.06651400e+02 -8.18622547e+02 4.66e+02 1.17e-01 5.51e+00 0s 1 9.17442714e+01 -4.29260679e+02 2.68e+01 6.66e-16 8.12e-01 0s 2 4.30683499e+01 -5.96854525e+01 2.58e-02 3.33e-16 1.24e-01 0s 3 2.17338782e+01 7.44661755e+00 2.77e-03 3.05e-16 1.71e-02 0s 4 2.03184917e+01 1.98169653e+01 3.63e-14 4.44e-16 6.01e-04 0s 5 2.00000457e+01 1.99997930e+01 3.99e-14 3.36e-16 3.03e-07 0s 6 2.00000000e+01 2.00000000e+01 4.63e-13 2.79e-16 3.05e-13 0s Barrier solved model in 6 iterations and 0.00 seconds Optimal objective 2.00000000e+01 Root relaxation: objective 2.000000e+01, 267 iterations, 0.01 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 (286 simplex iterations) in 0.02 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: 0.10 seconds Gurobi run time: 0.02 seconds Total run time: 0.12 seconds Objective: 20 Solution: 1 x [4, 5, 33, 35, 37] 2 x [5, 12, 30, 36, 38] 3 x [3, 6, 8, 19, 33] 1 x [3, 32, 32, 32, 32] 1 x [2, 7, 18, 23, 36] 2 x [2, 9, 10, 12, 30] 1 x [1, 6, 19, 28, 34] 1 x [21, 22, 26, 27, 39] 1 x [7, 11, 39, 39, 39] 1 x [11, 15, 20, 23, 38] 1 x [14, 21, 24, 27, 37] 3 x [6, 22, 25, 31, 35] 2 x [11, 13, 16, 17, 29]