Build (method = -2) #dp: 111 Step-3' Graph: 29 vertices and 80 arcs (0.00s) Step-4' Graph: 12 vertices and 46 arcs (0.00s) #V4/#V3 = 0.41 #A4/#A3 = 0.57 Ready! (0.00s) Optimize a model with 31 rows, 47 columns and 121 nonzeros Presolve removed 16 rows and 16 columns Presolve time: 0.00s Presolved: 15 rows, 31 columns, 75 nonzeros Variable types: 0 continuous, 31 integer (0 binary) Found heuristic solution: objective 1789.0000000 Found heuristic solution: objective 1679.0000000 Optimize a model with 15 rows, 31 columns and 75 nonzeros Presolved: 15 rows, 31 columns, 75 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 3.800e+01 Factor NZ : 1.200e+02 Factor Ops : 1.240e+03 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 3.35405551e+03 -4.72535860e+03 2.60e+03 1.11e-16 2.58e+02 0s 1 1.91725662e+03 5.19069957e+01 1.66e+01 4.44e-16 2.83e+01 0s 2 1.72628575e+03 7.87209753e+02 7.74e-01 6.66e-16 1.40e+01 0s 3 1.62225808e+03 1.40333877e+03 8.38e-04 2.22e-16 3.27e+00 0s 4 1.55672898e+03 1.53296223e+03 1.71e-04 2.22e-16 3.55e-01 0s 5 1.55138115e+03 1.55010460e+03 3.09e-06 1.11e-16 1.91e-02 0s 6 1.55100020e+03 1.55099991e+03 2.16e-10 2.22e-16 4.28e-06 0s 7 1.55100000e+03 1.55100000e+03 5.68e-13 2.22e-16 6.18e-12 0s Barrier solved model in 7 iterations and 0.00 seconds Optimal objective 1.55100000e+03 Root relaxation: objective 1.551000e+03, 19 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 1551.0000000 1551.00000 0.0% - 0s Explored 0 nodes (19 simplex iterations) in 0.00 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 1.551000000000e+03, best bound 1.551000000000e+03, gap 0.0% Preprocessing time: 0.01 seconds Gurobi run time: 0.00 seconds Total run time: 0.01 seconds Objective: 1551 Solution: 174 x [1] 2 x [2] 190 x [3] 23 x [4] 168 x [5] 132 x [6] 16 x [6, 18] 216 x [7] 99 x [8, 17] 35 x [9] 47 x [9, 16] 2 x [9, 17] 38 x [10, 17] 162 x [11] 81 x [12, 15] 12 x [12, 19] 110 x [13, 14] 43 x [13, 18] 1 x [13, 19]