Build (method = -2) #dp: 101 Step-3' Graph: 27 vertices and 74 arcs (0.00s) Step-4' Graph: 10 vertices and 40 arcs (0.00s) #V4/#V3 = 0.37 #A4/#A3 = 0.54 Ready! (0.00s) Optimize a model with 30 rows, 41 columns and 107 nonzeros Presolve removed 19 rows and 19 columns Presolve time: 0.00s Presolved: 11 rows, 22 columns, 52 nonzeros Variable types: 0 continuous, 22 integer (2 binary) Found heuristic solution: objective 160.0000000 Optimize a model with 11 rows, 22 columns and 52 nonzeros Presolved: 11 rows, 22 columns, 52 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 2.300e+01 Factor NZ : 6.600e+01 Factor Ops : 5.060e+02 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 5.07823472e+02 -1.24417842e+02 2.06e+02 2.22e-16 4.19e+01 0s 1 2.03234616e+02 2.49234162e+01 1.28e+01 1.67e-16 5.20e+00 0s 2 1.66805461e+02 1.35229122e+02 1.04e+00 1.22e-15 7.65e-01 0s 3 1.60202794e+02 1.58879562e+02 1.64e-02 4.16e-16 3.09e-02 0s 4 1.60000221e+02 1.59998886e+02 3.55e-14 3.33e-16 3.10e-05 0s Barrier performed 4 iterations in 0.00 seconds Objective cutoff exceeded Root relaxation: cutoff, 0 iterations, 0.00 seconds Explored 0 nodes (0 simplex iterations) in 0.00 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 1.600000000000e+02, best bound 1.600000000000e+02, gap 0.0% Preprocessing time: 0.01 seconds Gurobi run time: 0.00 seconds Total run time: 0.01 seconds Objective: 160 Solution: 15 x [1] 3 x [2, 19] 8 x [3] 1 x [3, 20] 12 x [4] 17 x [5] 7 x [6] 1 x [6, 20] 20 x [7] 21 x [8] 1 x [9, 20] 2 x [10, 19, 20] 1 x [10, 20] 3 x [11, 16] 1 x [11, 17] 22 x [12] 18 x [13, 16] 1 x [14, 15] 6 x [14, 18]