Build (method = -2) #dp: 676 Step-3' Graph: 153 vertices and 452 arcs (0.00s) Step-4' Graph: 37 vertices and 220 arcs (0.00s) #V4/#V3 = 0.24 #A4/#A3 = 0.49 Ready! (0.00s) Optimize a model with 76 rows, 221 columns and 593 nonzeros Presolve removed 23 rows and 34 columns Presolve time: 0.00s Presolved: 53 rows, 187 columns, 505 nonzeros Variable types: 0 continuous, 187 integer (0 binary) Found heuristic solution: objective 3395.0000000 Found heuristic solution: objective 3174.0000000 Optimize a model with 53 rows, 187 columns and 505 nonzeros Presolved: 53 rows, 187 columns, 505 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 2.320e+02 Factor NZ : 7.240e+02 Factor Ops : 1.201e+04 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 1.33639238e+04 -2.55358917e+04 4.67e+04 2.22e-16 3.81e+02 0s 1 5.35185967e+03 -1.08888480e+04 6.31e+03 8.88e-16 7.18e+01 0s 2 2.97877859e+03 -1.79202229e+03 1.31e+02 5.55e-15 1.25e+01 0s 3 2.31270895e+03 1.10385303e+03 2.38e+00 1.11e-15 3.08e+00 0s 4 2.08476467e+03 1.83724190e+03 2.76e-01 7.77e-16 6.30e-01 0s 5 2.05474750e+03 1.98909022e+03 6.76e-02 5.66e-16 1.67e-01 0s 6 2.04748179e+03 2.04610486e+03 2.60e-04 6.66e-16 3.50e-03 0s 7 2.04700002e+03 2.04699996e+03 9.30e-09 4.44e-16 1.51e-07 0s 8 2.04700000e+03 2.04700000e+03 7.96e-13 5.55e-16 1.51e-10 0s Barrier solved model in 8 iterations and 0.00 seconds Optimal objective 2.04700000e+03 Root relaxation: objective 2.047000e+03, 106 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 2047.0000000 2047.00000 0.0% - 0s Explored 0 nodes (106 simplex iterations) in 0.01 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 2.047000000000e+03, best bound 2.047000000000e+03, gap 0.0% Preprocessing time: 0.01 seconds Gurobi run time: 0.01 seconds Total run time: 0.02 seconds Objective: 2047 Solution: 30 x [1] 45 x [2] 34 x [2, 39] 148 x [3, 37] 171 x [4, 38] 143 x [5] 32 x [6, 35] 83 x [7, 31] 38 x [7, 32] 51 x [8, 30] 2 x [9, 26] 17 x [9, 28] 1 x [9, 30] 1 x [9, 32] 73 x [9, 35] 169 x [10, 30] 21 x [11, 24] 107 x [11, 26] 51 x [12, 24] 111 x [12, 29] 13 x [13, 27] 19 x [13, 31] 41 x [14, 31] 93 x [15, 31] 104 x [16, 22] 18 x [17, 22] 4 x [18, 22] 73 x [18, 31] 56 x [19, 22] 19 x [20, 21] 2 x [20, 22] 36 x [23, 29] 98 x [25, 27] 19 x [26, 29] 21 x [31, 33, 37] 9 x [31, 33, 38] 2 x [31, 33, 39] 43 x [31, 35, 36] 49 x [33, 34, 36]