Gurobi 5.0.1 (linux64) logging started Mon Feb  4 18:58:03 2013

Optimize a model with 34279 rows, 3481 columns and 104430 nonzeros
Presolve removed 2691 rows and 1759 columns
Presolve time: 0.26s
Presolved: 31588 rows, 1722 columns, 96327 nonzeros
Variable types: 28 continuous, 1694 integer (1694 binary)
Found heuristic solution: objective 64432.000000

Root relaxation: objective 4.517560e+04, 8519 iterations, 0.58 seconds

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

     0     0 45175.6030    0   10 64432.0000 45175.6030  29.9%     -    0s
H    0     0                    45181.000000 45175.6030  0.01%     -    0s
H    0     0                    45180.000000 45175.6030  0.01%     -    0s

Explored 0 nodes (8543 simplex iterations) in 0.98 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.518000000000e+04, best bound 4.517600000000e+04, gap 0.0089%