Build (method = -2) #dp: 162 Step-3' Graph: 42 vertices and 119 arcs (0.00s) Step-4' Graph: 15 vertices and 65 arcs (0.00s) #V4/#V3 = 0.36 #A4/#A3 = 0.55 Ready! (0.00s) Optimize a model with 35 rows, 66 columns and 172 nonzeros Presolve removed 18 rows and 21 columns Presolve time: 0.00s Presolved: 17 rows, 45 columns, 112 nonzeros Variable types: 0 continuous, 45 integer (0 binary) Found heuristic solution: objective 157.0000000 Found heuristic solution: objective 128.0000000 Optimize a model with 17 rows, 45 columns and 112 nonzeros Presolved: 17 rows, 45 columns, 112 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 5.800e+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 3.42614686e+02 -4.95352142e+02 3.72e+02 1.11e-16 2.43e+01 0s 1 1.78407406e+02 -1.02467039e+02 1.85e+01 4.44e-16 3.46e+00 0s 2 1.51645160e+02 3.14377314e+01 2.74e+00 3.33e-16 1.30e+00 0s 3 1.37667184e+02 1.14265939e+02 2.96e-04 3.33e-16 2.46e-01 0s 4 1.29514971e+02 1.24191136e+02 4.77e-05 2.22e-16 5.60e-02 0s 5 1.28059628e+02 1.27824546e+02 3.70e-06 2.22e-16 2.47e-03 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 1.280000000000e+02, best bound 1.280000000000e+02, gap 0.0% Preprocessing time: 0.01 seconds Gurobi run time: 0.00 seconds Total run time: 0.01 seconds Objective: 128 Solution: 2 x [1] 14 x [1, 20] 6 x [2] 11 x [3] 3 x [3, 17] 2 x [4] 2 x [5] 1 x [6] 16 x [6, 18] 3 x [7] 13 x [7, 15] 17 x [8] 1 x [9] 3 x [10, 16] 6 x [11] 11 x [11, 19] 3 x [12] 12 x [13, 14] 2 x [14]