Build (method = -2) #dp: 180 Step-3' Graph: 45 vertices and 128 arcs (0.00s) Step-4' Graph: 16 vertices and 70 arcs (0.00s) #V4/#V3 = 0.36 #A4/#A3 = 0.55 Ready! (0.00s) Optimize a model with 36 rows, 71 columns and 185 nonzeros Presolve removed 14 rows and 16 columns Presolve time: 0.00s Presolved: 22 rows, 55 columns, 137 nonzeros Variable types: 0 continuous, 55 integer (9 binary) Found heuristic solution: objective 170.0000000 Found heuristic solution: objective 161.0000000 Optimize a model with 22 rows, 55 columns and 137 nonzeros Presolved: 22 rows, 55 columns, 137 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 7.500e+01 Factor NZ : 1.970e+02 Factor Ops : 2.115e+03 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 6.14224974e+02 -4.94075070e+02 4.58e+02 1.52e-01 3.53e+01 0s 1 2.10479950e+02 -6.17603897e+01 2.27e+01 4.44e-16 3.34e+00 0s 2 1.71851820e+02 1.30651674e+02 1.18e+00 2.33e-15 3.73e-01 0s 3 1.63152245e+02 1.52096305e+02 6.98e-02 4.44e-16 9.58e-02 0s 4 1.57945320e+02 1.56042729e+02 7.73e-03 2.78e-16 1.64e-02 0s 5 1.57090655e+02 1.56962230e+02 6.70e-04 2.22e-16 1.11e-03 0s 6 1.57000005e+02 1.56999991e+02 4.84e-08 2.26e-16 1.21e-07 0s 7 1.57000000e+02 1.57000000e+02 4.62e-14 3.33e-16 1.21e-13 0s Barrier solved model in 7 iterations and 0.00 seconds Optimal objective 1.57000000e+02 Root relaxation: objective 1.570000e+02, 17 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 157.0000000 157.00000 0.0% - 0s Explored 0 nodes (17 simplex iterations) in 0.00 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 1.570000000000e+02, best bound 1.570000000000e+02, gap 0.0% Preprocessing time: 0.01 seconds Gurobi run time: 0.00 seconds Total run time: 0.01 seconds Objective: 157 Solution: 11 x [1] 2 x [2, 19] 8 x [2, 20] 14 x [3] 22 x [4] 1 x [5, 18] 11 x [5, 20] 19 x [6] 2 x [6, 17] 24 x [7] 24 x [8] 1 x [9, 15] 6 x [9, 16] 2 x [10, 12] 6 x [10, 14] 1 x [11, 12] 1 x [11, 13] 2 x [12, 13]