Build (method = -2) #dp: 551 Step-3' Graph: 150 vertices and 443 arcs (0.00s) Step-4' Graph: 35 vertices and 213 arcs (0.01s) #V4/#V3 = 0.23 #A4/#A3 = 0.48 Ready! (0.01s) Optimize a model with 72 rows, 214 columns and 576 nonzeros Presolve removed 25 rows and 31 columns Presolve time: 0.00s Presolved: 47 rows, 183 columns, 491 nonzeros Variable types: 0 continuous, 183 integer (10 binary) Found heuristic solution: objective 3527.0000000 Found heuristic solution: objective 3385.0000000 Optimize a model with 47 rows, 183 columns and 491 nonzeros Presolved: 47 rows, 183 columns, 491 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 2.560e+02 Factor NZ : 7.480e+02 Factor Ops : 1.428e+04 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 1.51579598e+04 -2.34057308e+04 7.01e+04 9.94e-02 5.24e+02 0s 1 5.77700152e+03 -8.03411368e+03 8.31e+03 4.44e-16 7.89e+01 0s 2 3.57234836e+03 3.52648096e+02 5.48e+02 1.78e-15 1.01e+01 0s 3 2.90921833e+03 2.16864267e+03 2.37e+01 6.66e-16 1.99e+00 0s 4 2.77062044e+03 2.70584382e+03 1.91e+00 2.81e-16 1.73e-01 0s 5 2.75716261e+03 2.75651953e+03 1.32e-02 3.33e-16 1.71e-03 0s 6 2.75700003e+03 2.75699996e+03 1.85e-06 2.60e-16 1.67e-07 0s 7 2.75700000e+03 2.75700000e+03 2.27e-12 3.87e-16 1.68e-13 0s Barrier solved model in 7 iterations and 0.00 seconds Optimal objective 2.75700000e+03 Root relaxation: objective 2.757000e+03, 99 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 2757.0000000 2757.00000 0.0% - 0s Explored 0 nodes (99 simplex iterations) in 0.01 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 2.757000000000e+03, best bound 2.757000000000e+03, gap 0.0% Preprocessing time: 0.01 seconds Gurobi run time: 0.01 seconds Total run time: 0.02 seconds Objective: 2757 Solution: 168 x [1] 274 x [2] 117 x [3] 36 x [3, 36] 145 x [4] 125 x [5] 60 x [6] 49 x [6, 35] 144 x [7] 117 x [8] 95 x [9, 33] 106 x [10] 83 x [11] 34 x [11, 28] 28 x [12] 116 x [13, 29] 39 x [13, 33] 140 x [14, 30] 28 x [14, 33] 1 x [14, 34] 4 x [14, 37] 3 x [15] 97 x [15, 26] 16 x [15, 37] 33 x [16, 37] 31 x [17] 65 x [17, 24] 4 x [17, 37] 3 x [18] 74 x [18, 25] 52 x [18, 31] 33 x [19] 134 x [19, 23] 65 x [20] 25 x [20, 27] 53 x [20, 29] 1 x [21] 63 x [21, 26] 3 x [21, 32] 11 x [22] 82 x [22, 25]