Gurobi 5.0.1 (linux64) logging started Mon Feb  4 18:56:24 2013

Optimize a model with 27775 rows, 3025 columns and 84700 nonzeros
Presolve removed 2855 rows and 1541 columns
Presolve time: 0.18s
Presolved: 24920 rows, 1484 columns, 76058 nonzeros
Variable types: 25 continuous, 1459 integer (1459 binary)
Found heuristic solution: objective 67818.000000

Root relaxation: objective 4.880005e+04, 7799 iterations, 0.48 seconds

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

     0     0 48800.0458    0    7 67818.0000 48800.0458  28.0%     -    0s
H    0     0                    48808.000000 48800.0458  0.02%     -    0s
     0     0 48802.2881    0   27 48808.0000 48802.2881  0.01%     -    0s
     0     0 48802.2881    0    9 48808.0000 48802.2881  0.01%     -    1s
H    0     0                    48806.000000 48802.2881  0.01%     -    1s

Explored 0 nodes (8021 simplex iterations) in 1.02 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.880600000000e+04, best bound 4.880300000000e+04, gap 0.0061%