Gurobi 5.0.1 (linux64) logging started Mon Feb  4 19:02:39 2013

Optimize a model with 52462 rows, 4624 columns and 159528 nonzeros
Presolve removed 4038 rows and 2339 columns
Presolve time: 0.41s
Presolved: 48424 rows, 2285 columns, 147479 nonzeros
Variable types: 34 continuous, 2251 integer (2251 binary)
Found heuristic solution: objective 91397.000000

Root relaxation: objective 6.849020e+04, 16295 iterations, 1.46 seconds

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

     0     0 68490.2000    0    5 91397.0000 68490.2000  25.1%     -    2s
H    0     0                    68496.000000 68490.2000  0.01%     -    2s

Explored 0 nodes (16342 simplex iterations) in 2.16 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 6.849600000000e+04, best bound 6.849100000000e+04, gap 0.0073%