Gurobi 5.0.1 (linux64) logging started Mon Feb  4 19:01:07 2013

Optimize a model with 47971 rows, 4356 columns and 145926 nonzeros
Presolve removed 5775 rows and 2247 columns
Presolve time: 0.35s
Presolved: 42196 rows, 2109 columns, 128034 nonzeros
Variable types: 23 continuous, 2086 integer (2086 binary)
Found heuristic solution: objective 100049.00000

Root relaxation: objective 8.534492e+04, 9745 iterations, 0.80 seconds

    Nodes    |    Current Node    |     Objective Bounds      |     Work
 Expl Unexpl |  Obj  Depth IntInf | Incumbent    BestBd   Gap | It/Node Time

     0     0 85344.9176    0    8 100049.000 85344.9176  14.7%     -    1s
H    0     0                    85374.000000 85344.9176  0.03%     -    1s
H    0     0                    85358.000000 85344.9176  0.02%     -    1s
H    0     0                    85353.000000 85344.9176  0.01%     -    1s

Explored 0 nodes (9749 simplex iterations) in 1.32 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 8.535300000000e+04, best bound 8.534500000000e+04, gap 0.0094%