Gurobi 5.0.1 (linux64) logging started Mon Feb  4 19:02:30 2013

Optimize a model with 52462 rows, 4624 columns and 159528 nonzeros
Presolve removed 4563 rows and 2352 columns
Presolve time: 0.42s
Presolved: 47899 rows, 2272 columns, 145579 nonzeros
Variable types: 29 continuous, 2243 integer (2243 binary)
Found heuristic solution: objective 101818.00000

Root relaxation: objective 8.058416e+04, 11379 iterations, 0.96 seconds

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

     0     0 80584.1571    0   11 101818.000 80584.1571  20.9%     -    1s
H    0     0                    80601.000000 80584.1571  0.02%     -    1s
H    0     0                    80590.000000 80584.1571  0.01%     -    1s

Explored 0 nodes (11411 simplex iterations) in 1.62 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 8.059000000000e+04, best bound 8.058500000000e+04, gap 0.0062%