Build (method = -2) #dp: 554 Step-3' Graph: 47 vertices and 270 arcs (0.00s) Step-4' Graph: 30 vertices and 236 arcs (0.00s) #V4/#V3 = 0.64 #A4/#A3 = 0.87 Ready! (0.00s) Optimize a model with 68 rows, 237 columns and 658 nonzeros Presolve removed 25 rows and 31 columns Presolve time: 0.00s Presolved: 43 rows, 206 columns, 571 nonzeros Variable types: 0 continuous, 206 integer (10 binary) Found heuristic solution: objective 3841.0000000 Found heuristic solution: objective 3270.0000000 Optimize a model with 43 rows, 206 columns and 571 nonzeros Presolved: 43 rows, 206 columns, 571 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 2.500e+02 Factor NZ : 6.790e+02 Factor Ops : 1.278e+04 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 1.58856665e+04 -2.55631806e+04 7.39e+04 1.10e-01 5.09e+02 0s 1 5.51437191e+03 -1.02170245e+04 7.52e+03 1.11e-15 7.18e+01 0s 2 3.39234337e+03 -1.32419974e+03 4.21e+02 5.00e-16 1.22e+01 0s 3 2.74248779e+03 1.27908957e+03 2.94e+01 3.33e-16 3.47e+00 0s 4 2.51608035e+03 2.23878458e+03 4.87e+00 3.33e-16 6.54e-01 0s 5 2.45591381e+03 2.42161176e+03 5.32e-01 3.35e-16 8.08e-02 0s 6 2.45123033e+03 2.45055657e+03 1.90e-02 3.08e-16 1.59e-03 0s 7 2.45100003e+03 2.45099997e+03 2.63e-06 4.44e-16 1.39e-07 0s 8 2.45100000e+03 2.45100000e+03 4.55e-13 5.82e-16 1.39e-10 0s Barrier solved model in 8 iterations and 0.00 seconds Optimal objective 2.45100000e+03 Root relaxation: objective 2.451000e+03, 75 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 2451.0000000 2451.00000 0.0% - 0s Explored 0 nodes (75 simplex iterations) in 0.01 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 2.451000000000e+03, best bound 2.451000000000e+03, gap 0.0% Preprocessing time: 0.01 seconds Gurobi run time: 0.01 seconds Total run time: 0.02 seconds Objective: 2451 Solution: 19 x [16] 157 x [16, 18] 80 x [35] 44 x [29] 7 x [29, 37] 181 x [14] 14 x [26, 37] 44 x [21] 22 x [2, 21] 142 x [30, 37] 254 x [19] 25 x [7, 13] 2 x [13, 37] 13 x [2, 10] 6 x [10, 37] 155 x [36] 106 x [6, 33] 19 x [4] 51 x [4, 33] 79 x [27] 83 x [22, 25] 20 x [24] 7 x [15] 11 x [15, 22] 40 x [12, 15] 44 x [3, 15] 1 x [15, 38] 168 x [8, 32] 22 x [5, 17] 90 x [1, 17] 88 x [1, 11] 62 x [23, 34] 111 x [20, 34] 34 x [17, 34] 124 x [23, 31] 83 x [9, 31] 4 x [28, 32] 39 x [9, 28]