Build (method = -2) #dp: 613 Step-3' Graph: 48 vertices and 147 arcs (0.00s) Step-4' Graph: 14 vertices and 79 arcs (0.00s) #V4/#V3 = 0.29 #A4/#A3 = 0.54 Ready! (0.00s) Optimize a model with 49 rows, 80 columns and 217 nonzeros Presolve removed 32 rows and 36 columns Presolve time: 0.00s Presolved: 17 rows, 44 columns, 107 nonzeros Variable types: 0 continuous, 44 integer (10 binary) Found heuristic solution: objective 33.0000000 Found heuristic solution: objective 26.0000000 Optimize a model with 17 rows, 44 columns and 107 nonzeros Presolved: 17 rows, 44 columns, 107 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 3.100e+01 Factor NZ : 1.530e+02 Factor Ops : 1.785e+03 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 4.52733084e+02 -3.62656044e+02 1.11e+02 2.22e-16 2.15e+01 0s 1 8.57684052e+01 -1.00645677e+02 7.59e+00 7.77e-16 2.56e+00 0s 2 4.04202193e+01 6.10223284e+00 3.47e-02 2.44e-15 3.69e-01 0s 3 3.15787885e+01 1.66383876e+01 3.96e-03 1.33e-15 1.61e-01 0s 4 2.58491149e+01 2.34114183e+01 1.24e-04 4.44e-16 2.62e-02 0s 5 2.55125929e+01 2.54232990e+01 5.60e-06 2.22e-16 9.60e-04 0s Barrier performed 5 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 2.600000000000e+01, best bound 2.600000000000e+01, gap 0.0% Preprocessing time: 0.01 seconds Gurobi run time: 0.00 seconds Total run time: 0.01 seconds Objective: 26 Solution: 1 x [35] 1 x [3, 34] 1 x [2, 34] 1 x [4, 33] 1 x [5, 32] 1 x [9, 31] 1 x [8, 31] 1 x [10, 30] 1 x [12, 29] 1 x [14, 28] 1 x [15, 27] 1 x [11, 26] 1 x [16, 25] 2 x [15, 25] 1 x [18, 24] 1 x [22, 23] 1 x [21, 23] 1 x [20, 23] 1 x [19, 23] 1 x [17, 23] 1 x [18] 1 x [6, 15] 1 x [13, 14] 1 x [7, 9] 1 x [1, 1]