Gurobi 5.0.1 (linux64) logging started Sat Dec 8 02:35:17 2012 Optimize a model with 285 rows, 270 columns and 890 nonzeros Presolve removed 20 rows and 12 columns Presolve time: 0.00s Presolved: 265 rows, 258 columns, 853 nonzeros Variable types: 172 continuous, 86 integer (86 binary) Root relaxation: objective 2.893718e+04, 147 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 28937.1796 0 51 - 28937.1796 - - 0s H 0 0 41771.000000 28937.1796 30.7% - 0s 0 0 33007.7979 0 25 41771.0000 33007.7979 21.0% - 0s 0 0 33138.8906 0 19 41771.0000 33138.8906 20.7% - 0s 0 0 33168.1709 0 18 41771.0000 33168.1709 20.6% - 0s 0 0 33176.8925 0 32 41771.0000 33176.8925 20.6% - 0s H 0 0 34533.000000 33176.8925 3.93% - 0s 0 2 33179.4890 0 32 34533.0000 33179.4890 3.92% - 0s * 63 46 29 34398.000000 33271.8676 3.27% 5.7 0s H 89 52 34219.000000 33333.0929 2.59% 5.8 0s * 98 57 30 34187.000000 33333.0929 2.50% 5.6 0s H 132 68 34130.000000 33427.6477 2.06% 6.2 0s * 144 72 25 34098.000000 33427.6477 1.97% 5.9 0s * 273 102 24 33999.000000 33557.1883 1.30% 5.3 0s * 367 110 21 33919.000000 33623.5574 0.87% 5.6 0s * 458 122 22 33906.000000 33650.8015 0.75% 5.4 0s * 1078 37 30 33874.000000 33824.5620 0.15% 5.8 0s * 1104 20 29 33870.000000 33849.4311 0.06% 5.8 0s Cutting planes: Gomory: 17 Cover: 1 Flow cover: 48 Flow path: 28 Explored 1127 nodes (6733 simplex iterations) in 0.39 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.387000000000e+04, best bound 3.386672365578e+04, gap 0.0097%