Gurobi 5.0.1 (linux64) logging started Mon Dec 10 23:29:48 2012 Optimize a model with 2190 rows, 2160 columns and 7153 nonzeros Presolve removed 98 rows and 59 columns Presolve time: 0.02s Presolved: 2092 rows, 2101 columns, 6923 nonzeros Variable types: 1399 continuous, 702 integer (702 binary) Root relaxation: objective 1.783954e+05, 1061 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 178395.424 0 375 - 178395.424 - - 0s H 0 0 325073.00000 178395.424 45.1% - 0s 0 0 226682.574 0 65 325073.000 226682.574 30.3% - 0s H 0 0 259464.36998 226682.574 12.6% - 0s 0 0 228605.053 0 57 259464.370 228605.053 11.9% - 0s H 0 0 255419.65157 228605.053 10.5% - 0s 0 0 229053.264 0 18 255419.652 229053.264 10.3% - 0s H 0 0 237243.91578 229053.264 3.45% - 0s * 0 0 0 229176.00000 229176.000 0.0% - 0s Cutting planes: Gomory: 25 Cover: 4 Implied bound: 1 Flow cover: 232 Flow path: 166 Explored 0 nodes (1544 simplex iterations) in 0.17 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.291760000000e+05, best bound 2.291760000000e+05, gap 0.0%