Build (method = -2) #dp: 171 Step-3' Graph: 17 vertices and 64 arcs (0.00s) Step-4' Graph: 11 vertices and 52 arcs (0.00s) #V4/#V3 = 0.65 #A4/#A3 = 0.81 Ready! (0.00s) Optimize a model with 31 rows, 53 columns and 143 nonzeros Presolve removed 12 rows and 12 columns Presolve time: 0.00s Presolved: 19 rows, 41 columns, 109 nonzeros Variable types: 0 continuous, 41 integer (0 binary) Found heuristic solution: objective 198.0000000 Found heuristic solution: objective 179.0000000 Found heuristic solution: objective 141.0000000 Optimize a model with 19 rows, 41 columns and 109 nonzeros Presolved: 19 rows, 41 columns, 109 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 4.400e+01 Factor NZ : 1.900e+02 Factor Ops : 2.470e+03 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 5.47819945e+02 -4.75892876e+02 4.40e+02 2.22e-16 2.48e+01 0s 1 1.90354166e+02 -8.91375376e+01 2.16e+01 2.78e-16 3.42e+00 0s 2 1.34272219e+02 1.91166310e+01 2.28e+00 1.94e-16 1.27e+00 0s 3 1.05006828e+02 9.20247172e+01 1.18e-02 3.33e-16 1.41e-01 0s 4 1.02507041e+02 1.00598061e+02 1.21e-03 2.22e-16 2.07e-02 0s 5 1.02147081e+02 1.02073940e+02 6.87e-05 3.33e-16 7.95e-04 0s 6 1.02125002e+02 1.02124995e+02 1.86e-09 2.22e-16 7.21e-08 0s 7 1.02125000e+02 1.02125000e+02 2.84e-14 2.22e-16 7.37e-14 0s Barrier solved model in 7 iterations and 0.00 seconds Optimal objective 1.02125000e+02 Root relaxation: objective 1.021250e+02, 15 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 102.12500 0 8 141.00000 102.12500 27.6% - 0s H 0 0 103.0000000 102.12500 0.85% - 0s Explored 0 nodes (15 simplex iterations) in 0.00 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 1.030000000000e+02, best bound 1.030000000000e+02, gap 0.0% Preprocessing time: 0.01 seconds Gurobi run time: 0.00 seconds Total run time: 0.01 seconds Objective: 103 Solution: 4 x [15] 3 x [10] 7 x [11] 9 x [14, 19] 7 x [4, 17] 8 x [7, 8] 2 x [9, 12] 5 x [2, 5] 3 x [1, 18] 17 x [6, 12] 13 x [3, 18] 4 x [18, 20] 1 x [20] 10 x [4, 8] 2 x [4, 16, 16] 1 x [14, 16] 7 x [13, 13, 16]