Gurobi 5.0.1 (linux64) logging started Mon Feb  4 19:03:04 2013

Optimize a model with 54809 rows, 4761 columns and 166635 nonzeros
Presolve removed 3940 rows and 2406 columns
Presolve time: 0.43s
Presolved: 50869 rows, 2355 columns, 154782 nonzeros
Variable types: 33 continuous, 2322 integer (2322 binary)
Found heuristic solution: objective 104948.00000

Root relaxation: objective 7.135994e+04, 15564 iterations, 1.33 seconds

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

     0     0 71359.9355    0   11 104948.000 71359.9355  32.0%     -    2s
H    0     0                    71376.000000 71359.9355  0.02%     -    2s
H    0     0                    71370.000000 71359.9355  0.01%     -    2s
H    0     0                    71365.000000 71359.9355  0.01%     -    2s

Explored 0 nodes (15645 simplex iterations) in 2.11 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 7.136500000000e+04, best bound 7.136000000000e+04, gap 0.0070%