Gurobi 5.0.1 (linux64) logging started Mon Feb 4 16:14:16 2013 Optimize a model with 833 rows, 289 columns and 2601 nonzeros Presolve removed 154 rows and 140 columns Presolve time: 0.00s Presolved: 679 rows, 149 columns, 2233 nonzeros Variable types: 14 continuous, 135 integer (135 binary) Found heuristic solution: objective 3726.0000000 Root relaxation: objective 2.248667e+03, 61 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2248.66667 0 9 3726.00000 2248.66667 39.6% - 0s H 0 0 2266.0000000 2248.66667 0.76% - 0s 0 0 2250.16520 0 20 2266.00000 2250.16520 0.70% - 0s 0 0 2251.11828 0 22 2266.00000 2251.11828 0.66% - 0s 0 0 2251.11828 0 10 2266.00000 2251.11828 0.66% - 0s H 0 0 2263.0000000 2251.11828 0.53% - 0s 0 0 2251.41593 0 26 2263.00000 2251.41593 0.51% - 0s 0 0 2252.11820 0 24 2263.00000 2252.11820 0.48% - 0s 0 0 2252.42565 0 20 2263.00000 2252.42565 0.47% - 0s 0 0 2252.70922 0 24 2263.00000 2252.70922 0.45% - 0s 0 0 2252.99018 0 25 2263.00000 2252.99018 0.44% - 0s 0 0 2253.58341 0 25 2263.00000 2253.58341 0.42% - 0s 0 0 2253.70915 0 27 2263.00000 2253.70915 0.41% - 0s 0 0 2253.77044 0 27 2263.00000 2253.77044 0.41% - 0s 0 0 2253.91270 0 26 2263.00000 2253.91270 0.40% - 0s 0 0 2253.93157 0 26 2263.00000 2253.93157 0.40% - 0s 0 0 2254.03204 0 24 2263.00000 2254.03204 0.40% - 0s 0 0 2254.03677 0 24 2263.00000 2254.03677 0.40% - 0s 0 0 2254.03706 0 24 2263.00000 2254.03706 0.40% - 0s H 0 0 2262.0000000 2254.03706 0.35% - 0s 0 2 2254.12996 0 24 2262.00000 2254.12996 0.35% - 0s H 18 11 2259.0000000 2255.00523 0.18% 4.8 0s * 25 0 6 2257.0000000 2257.00000 0.0% 7.1 0s Cutting planes: Gomory: 1 Cover: 1 Implied bound: 1 MIR: 34 Mod-K: 1 Explored 26 nodes (670 simplex iterations) in 0.07 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.257000000000e+03, best bound 2.257000000000e+03, gap 0.0%