Gurobi 5.0.1 (linux64) logging started Mon Feb 4 17:56:29 2013 Optimize a model with 7806 rows, 1296 columns and 23976 nonzeros Presolve removed 2446 rows and 719 columns Presolve time: 0.06s Presolved: 5360 rows, 577 columns, 16408 nonzeros Variable types: 10 continuous, 567 integer (567 binary) Found heuristic solution: objective 27881.000000 Root relaxation: objective 2.447762e+04, 1085 iterations, 0.03 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 24477.6167 0 5 27881.0000 24477.6167 12.2% - 0s H 0 0 24492.000000 24477.6167 0.06% - 0s 0 0 24480.2158 0 16 24492.0000 24480.2158 0.05% - 0s 0 0 24480.2158 0 5 24492.0000 24480.2158 0.05% - 0s 0 0 24480.2158 0 16 24492.0000 24480.2158 0.05% - 0s H 0 0 24490.000000 24480.2158 0.04% - 0s H 0 0 24485.000000 24480.2158 0.02% - 0s 0 1 24480.5493 0 16 24485.0000 24480.5493 0.02% - 0s Cutting planes: Gomory: 3 Cover: 2 MIR: 5 Explored 4 nodes (1197 simplex iterations) in 0.17 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.448500000000e+04, best bound 2.448500000000e+04, gap 0.0%