Build (method = -2) #dp: 143 Step-3' Graph: 35 vertices and 98 arcs (0.00s) Step-4' Graph: 14 vertices and 56 arcs (0.00s) #V4/#V3 = 0.40 #A4/#A3 = 0.57 Ready! (0.00s) Optimize a model with 33 rows, 57 columns and 147 nonzeros Presolve removed 15 rows and 16 columns Presolve time: 0.00s Presolved: 18 rows, 41 columns, 102 nonzeros Variable types: 0 continuous, 41 integer (0 binary) Found heuristic solution: objective 1868.0000000 Found heuristic solution: objective 1614.0000000 Optimize a model with 18 rows, 41 columns and 102 nonzeros Presolved: 18 rows, 41 columns, 102 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 5.600e+01 Factor NZ : 1.710e+02 Factor Ops : 2.109e+03 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 4.49300915e+03 -5.14736244e+03 5.34e+03 2.22e-16 3.32e+02 0s 1 2.21592985e+03 -2.21709088e+02 4.24e+02 3.61e-16 4.06e+01 0s 2 1.77556642e+03 1.28595764e+03 2.27e+01 9.99e-16 5.96e+00 0s 3 1.63538724e+03 1.54758890e+03 5.16e-01 3.33e-16 1.00e+00 0s 4 1.61584939e+03 1.60799638e+03 1.86e-03 1.53e-16 8.92e-02 0s 5 1.61400952e+03 1.61399016e+03 3.18e-12 2.22e-16 2.20e-04 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 1.614000000000e+03, best bound 1.614000000000e+03, gap 0.0% Preprocessing time: 0.01 seconds Gurobi run time: 0.00 seconds Total run time: 0.01 seconds Objective: 1614 Solution: 176 x [1] 63 x [2] 21 x [3] 16 x [4] 81 x [5] 15 x [5, 18] 113 x [5, 19] 130 x [6] 4 x [6, 17] 303 x [7] 119 x [8, 16] 158 x [9] 5 x [10] 67 x [10, 16] 186 x [11] 11 x [11, 14] 7 x [11, 15] 89 x [12] 50 x [12, 13]