Build (method = -2) #dp: 2548 Step-3' Graph: 496 vertices and 1481 arcs (0.02s) Step-4' Graph: 179 vertices and 847 arcs (0.02s) #V4/#V3 = 0.36 #A4/#A3 = 0.57 Ready! (0.02s) Optimize a model with 218 rows, 848 columns and 2190 nonzeros Presolve removed 39 rows and 63 columns Presolve time: 0.01s Presolved: 179 rows, 785 columns, 2106 nonzeros Variable types: 0 continuous, 785 integer (0 binary) Found heuristic solution: objective 2677.0000000 Optimize a model with 179 rows, 785 columns and 2106 nonzeros Presolved: 179 rows, 785 columns, 2106 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 1.556e+03 Factor NZ : 4.509e+03 Factor Ops : 1.469e+05 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 1.56186978e+04 -1.25668274e+05 9.49e+04 2.22e-16 4.71e+02 0s 1 6.73245180e+03 -5.37545105e+04 1.83e+04 6.66e-16 1.04e+02 0s 2 3.43057373e+03 -1.41463041e+04 1.75e+03 9.99e-16 1.59e+01 0s 3 2.69991259e+03 -3.22636173e+03 9.80e+01 6.38e-16 3.89e+00 0s 4 2.39132557e+03 -5.05979567e+02 4.32e+01 4.44e-16 1.87e+00 0s 5 2.13011180e+03 6.82155408e+02 1.61e+01 3.05e-16 9.23e-01 0s 6 1.98089418e+03 1.60690495e+03 4.29e+00 2.74e-16 2.38e-01 0s 7 1.91749893e+03 1.85762604e+03 7.42e-01 3.01e-16 3.81e-02 0s 8 1.90501292e+03 1.90335992e+03 1.36e-12 3.38e-16 1.04e-03 0s 9 1.90450051e+03 1.90449886e+03 6.25e-13 3.37e-16 1.04e-06 0s 10 1.90450000e+03 1.90450000e+03 8.85e-13 3.73e-16 1.04e-09 0s Barrier solved model in 10 iterations and 0.01 seconds Optimal objective 1.90450000e+03 Root relaxation: objective 1.904500e+03, 304 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 1904.50000 0 11 2677.00000 1904.50000 28.9% - 0s H 0 0 1906.0000000 1904.50000 0.08% - 0s H 0 0 1905.0000000 1904.50000 0.03% - 0s Explored 0 nodes (487 simplex iterations) in 0.04 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 1.905000000000e+03, best bound 1.905000000000e+03, gap 0.0% Preprocessing time: 0.03 seconds Gurobi run time: 0.04 seconds Total run time: 0.07 seconds Objective: 1905 Solution: 116 x [1, 35, 38] 120 x [2] 58 x [2, 31] 44 x [2, 34] 33 x [3] 24 x [3, 27] 79 x [3, 27, 36] 71 x [3, 29] 65 x [3, 32] 38 x [4, 29] 4 x [4, 30] 29 x [4, 33] 61 x [5, 34] 4 x [6] 5 x [6, 27] 70 x [6, 27, 37] 7 x [6, 28, 39] 1 x [6, 31] 72 x [6, 34] 2 x [6, 34, 35] 1 x [6, 34, 35, 36] 18 x [6, 39] 5 x [7] 32 x [7, 26] 107 x [7, 31, 35] 10 x [7, 38, 39] 1 x [8] 70 x [8, 28] 2 x [8, 38] 1 x [8, 38, 39] 29 x [9] 11 x [9, 39] 69 x [10, 25] 65 x [10, 26] 4 x [10, 39] 11 x [11] 142 x [11, 23] 33 x [11, 24] 16 x [12, 22] 1 x [13] 40 x [13, 17] 36 x [13, 19] 22 x [14, 20] 9 x [15, 18] 70 x [15, 19] 25 x [15, 20] 21 x [16, 18] 46 x [16, 22] 19 x [17, 21] 48 x [18, 19] 38 x [18, 20]