Build (method = -2) #dp: 4201 Step-3' Graph: 124 vertices and 365 arcs (0.02s) Step-4' Graph: 10 vertices and 137 arcs (0.02s) #V4/#V3 = 0.08 #A4/#A3 = 0.38 Ready! (0.02s) Optimize a model with 51 rows, 138 columns and 398 nonzeros Presolve removed 6 rows and 6 columns Presolve time: 0.00s Presolved: 45 rows, 132 columns, 382 nonzeros Variable types: 0 continuous, 132 integer (92 binary) Found heuristic solution: objective 17.0000000 Optimize a model with 45 rows, 132 columns and 382 nonzeros Presolved: 45 rows, 132 columns, 382 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 1.340e+02 Factor NZ : 5.850e+02 Factor Ops : 1.169e+04 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 1.17929001e+02 -1.18412159e+02 8.54e+00 1.75e-02 1.37e+00 0s 1 2.90291055e+01 -2.06269879e+01 2.13e-14 2.22e-16 1.96e-01 0s 2 1.79316051e+01 1.30519961e+01 1.33e-14 1.77e-03 1.86e-02 0s 3 1.66742920e+01 1.66582080e+01 5.03e-14 1.11e-16 5.94e-05 0s Barrier performed 3 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 1.700000000000e+01, best bound 1.700000000000e+01, gap 0.0% Preprocessing time: 0.03 seconds Gurobi run time: 0.00 seconds Total run time: 0.03 seconds Objective: 17 Solution: 1 x [10, 27, 40] 1 x [8, 9, 38] 1 x [7, 17, 36] 1 x [6, 29, 41] 1 x [6, 35, 38] 1 x [5, 17, 34] 1 x [4, 13, 33] 1 x [3, 15, 32] 1 x [2, 20, 31] 1 x [1, 28, 30] 1 x [26, 38, 39] 1 x [17, 25, 37] 1 x [12, 21, 28] 1 x [13, 18, 24] 1 x [15, 16, 23] 1 x [14, 20, 22] 1 x [11, 19]