Build (method = -2) #dp: 267 Step-3' Graph: 29 vertices and 120 arcs (0.00s) Step-4' Graph: 19 vertices and 100 arcs (0.00s) #V4/#V3 = 0.66 #A4/#A3 = 0.83 Ready! (0.00s) Optimize a model with 39 rows, 101 columns and 272 nonzeros Presolve removed 11 rows and 12 columns Presolve time: 0.00s Presolved: 28 rows, 89 columns, 230 nonzeros Variable types: 0 continuous, 89 integer (0 binary) Found heuristic solution: objective 198.0000000 Found heuristic solution: objective 186.0000000 Found heuristic solution: objective 169.0000000 Optimize a model with 28 rows, 89 columns and 230 nonzeros Presolved: 28 rows, 89 columns, 230 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 1.090e+02 Factor NZ : 2.810e+02 Factor Ops : 3.419e+03 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 9.90646951e+02 -1.25784767e+03 1.50e+03 1.11e-16 4.10e+01 0s 1 3.20123436e+02 -4.09970916e+02 1.83e+02 3.33e-16 6.52e+00 0s 2 1.58262168e+02 4.79169726e-01 1.60e-14 2.22e-16 8.35e-01 0s 3 1.11405360e+02 8.23947371e+01 1.42e-14 2.22e-16 1.53e-01 0s 4 1.02501649e+02 9.85264495e+01 1.42e-14 2.22e-16 2.10e-02 0s 5 1.01488663e+02 9.99174834e+01 1.42e-14 1.11e-16 8.31e-03 0s 6 1.01224824e+02 1.00811379e+02 9.95e-14 2.22e-16 2.19e-03 0s 7 1.01173085e+02 1.01158943e+02 4.26e-14 2.22e-16 7.48e-05 0s 8 1.01166673e+02 1.01166659e+02 5.68e-14 1.68e-16 7.50e-08 0s 9 1.01166667e+02 1.01166667e+02 4.26e-14 2.22e-16 7.50e-14 0s Barrier solved model in 9 iterations and 0.00 seconds Optimal objective 1.01166667e+02 Root relaxation: objective 1.011667e+02, 28 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 101.16667 0 8 169.00000 101.16667 40.1% - 0s H 0 0 102.0000000 101.16667 0.82% - 0s Explored 0 nodes (33 simplex iterations) in 0.00 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 1.020000000000e+02, best bound 1.020000000000e+02, gap 0.0% Preprocessing time: 0.01 seconds Gurobi run time: 0.00 seconds Total run time: 0.01 seconds Objective: 102 Solution: 14 x [19] 2 x [5, 13] 2 x [2, 16] 1 x [15, 16] 16 x [12, 16] 1 x [13, 16] 8 x [1, 15] 2 x [4, 18] 13 x [9, 18] 2 x [4, 14] 6 x [8, 10] 9 x [6, 8] 1 x [4, 8] 1 x [4, 20] 7 x [13, 20] 1 x [7] 6 x [3, 7, 17] 4 x [7, 7] 2 x [3, 11, 13] 3 x [2, 3, 15] 1 x [2, 9]