Build (method = -2) #dp: 171 Step-3' Graph: 40 vertices and 113 arcs (0.00s) Step-4' Graph: 17 vertices and 67 arcs (0.00s) #V4/#V3 = 0.42 #A4/#A3 = 0.59 Ready! (0.00s) Optimize a model with 37 rows, 68 columns and 174 nonzeros Presolve removed 16 rows and 16 columns Presolve time: 0.00s Presolved: 21 rows, 52 columns, 128 nonzeros Variable types: 0 continuous, 52 integer (0 binary) Found heuristic solution: objective 1810.0000000 Found heuristic solution: objective 1604.0000000 Optimize a model with 21 rows, 52 columns and 128 nonzeros Presolved: 21 rows, 52 columns, 128 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 8.000e+01 Factor NZ : 2.310e+02 Factor Ops : 3.311e+03 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 3.65816092e+03 -9.08347196e+03 5.12e+03 2.22e-16 3.36e+02 0s 1 2.10246256e+03 -1.44505807e+03 4.85e+02 3.33e-16 4.70e+01 0s 2 1.71264600e+03 9.92939418e+02 9.45e+00 2.89e-15 6.67e+00 0s 3 1.61471318e+03 1.51214288e+03 3.69e-01 2.22e-16 9.34e-01 0s 4 1.60411567e+03 1.60220672e+03 2.84e-13 1.84e-16 1.74e-02 0s 5 1.60400001e+03 1.60399997e+03 1.02e-12 2.22e-16 3.13e-07 0s Barrier performed 5 iterations in 0.00 seconds Objective cutoff exceeded Root relaxation: cutoff, 0 iterations, 0.00 seconds Explored 0 nodes (0 simplex iterations) in 0.00 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 1.604000000000e+03, best bound 1.604000000000e+03, gap 0.0% Preprocessing time: 0.01 seconds Gurobi run time: 0.00 seconds Total run time: 0.01 seconds Objective: 1604 Solution: 72 x [1] 5 x [2, 19, 20] 131 x [3] 109 x [4] 97 x [5] 154 x [6] 5 x [6, 16, 19] 5 x [6, 19] 186 x [7] 144 x [8] 26 x [8, 18] 108 x [9, 17] 16 x [9, 18] 5 x [9, 19, 20] 177 x [10, 15] 4 x [10, 19, 20] 184 x [11] 1 x [11, 19, 20] 18 x [12] 133 x [13] 24 x [13, 14]