Build (method = -2) #dp: 696 Step-3' Graph: 145 vertices and 428 arcs (0.00s) Step-4' Graph: 39 vertices and 216 arcs (0.00s) #V4/#V3 = 0.27 #A4/#A3 = 0.50 Ready! (0.00s) Optimize a model with 78 rows, 217 columns and 577 nonzeros Presolve removed 25 rows and 29 columns Presolve time: 0.00s Presolved: 53 rows, 188 columns, 496 nonzeros Variable types: 0 continuous, 188 integer (15 binary) Found heuristic solution: objective 328.0000000 Found heuristic solution: objective 321.0000000 Found heuristic solution: objective 316.0000000 Optimize a model with 53 rows, 188 columns and 496 nonzeros Presolved: 53 rows, 188 columns, 496 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 2.790e+02 Factor NZ : 8.330e+02 Factor Ops : 1.507e+04 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 1.77762418e+03 -4.33888789e+03 4.49e+03 2.22e-16 8.59e+01 0s 1 6.90288750e+02 -1.37467589e+03 5.11e+02 6.66e-16 1.20e+01 0s 2 3.39471114e+02 -1.44648262e+02 1.29e+01 2.22e-15 1.34e+00 0s 3 2.73427381e+02 1.40753687e+02 2.42e-01 4.44e-16 3.39e-01 0s 4 2.29187532e+02 1.89715984e+02 1.64e-02 3.05e-16 1.01e-01 0s 5 2.18430965e+02 2.09878973e+02 5.64e-03 3.21e-16 2.18e-02 0s 6 2.15686889e+02 2.13358375e+02 9.98e-04 3.33e-16 5.94e-03 0s 7 2.15167438e+02 2.14695457e+02 2.44e-04 4.44e-16 1.20e-03 0s 8 2.15004618e+02 2.14993725e+02 3.89e-06 4.13e-16 2.78e-05 0s 9 2.15000000e+02 2.15000000e+02 5.07e-11 4.44e-16 4.19e-10 0s Barrier solved model in 9 iterations and 0.00 seconds Optimal objective 2.15000000e+02 Root relaxation: objective 2.150000e+02, 58 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 215.0000000 215.00000 0.0% - 0s Explored 0 nodes (58 simplex iterations) in 0.01 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 2.150000000000e+02, best bound 2.150000000000e+02, gap 0.0% Preprocessing time: 0.01 seconds Gurobi run time: 0.01 seconds Total run time: 0.02 seconds Objective: 215 Solution: 18 x [1] 11 x [2, 39] 2 x [3] 3 x [3, 38] 1 x [3, 39] 13 x [4, 38] 16 x [5] 2 x [6, 36] 1 x [7, 35] 2 x [8, 35] 15 x [8, 37] 14 x [9, 34] 7 x [10, 31] 3 x [11, 33] 11 x [12, 30] 13 x [13, 29] 2 x [13, 32] 1 x [14, 27] 10 x [14, 28] 13 x [15, 27] 5 x [16, 33] 1 x [17, 27] 3 x [17, 31] 8 x [18, 25] 1 x [19, 25] 1 x [19, 30] 2 x [20, 23] 9 x [21, 22] 16 x [22, 23] 1 x [22, 24] 4 x [22, 25] 1 x [22, 34, 39] 2 x [22, 35, 37] 3 x [26, 32, 33]