Gurobi 5.0.1 (linux64) logging started Mon Feb  4 19:01:40 2013

Optimize a model with 50183 rows, 4489 columns and 152626 nonzeros
Presolve removed 8365 rows and 2358 columns
Presolve time: 0.38s
Presolved: 41818 rows, 2131 columns, 126729 nonzeros
Variable types: 20 continuous, 2111 integer (2111 binary)
Found heuristic solution: objective 108410.00000

Root relaxation: objective 8.862373e+04, 7738 iterations, 0.65 seconds

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

     0     0 88623.7273    0   10 108410.000 88623.7273  18.3%     -    1s
H    0     0                    88633.000000 88623.7273  0.01%     -    1s
     0     0 88624.0000    0    9 88633.0000 88624.0000  0.01%     -    1s
     0     0 88624.0000    0   10 88633.0000 88624.0000  0.01%     -    1s
H    0     0                    88628.000000 88624.0000  0.00%     -    1s

Explored 0 nodes (8803 simplex iterations) in 1.65 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 8.862800000000e+04, best bound 8.862400000000e+04, gap 0.0045%