Gurobi 5.0.1 (linux64) logging started Mon Feb  4 18:57:13 2013

Optimize a model with 30913 rows, 3249 columns and 94221 nonzeros
Presolve removed 3782 rows and 1671 columns
Presolve time: 0.23s
Presolved: 27131 rows, 1578 columns, 82634 nonzeros
Variable types: 23 continuous, 1555 integer (1555 binary)
Found heuristic solution: objective 56802.000000

Root relaxation: objective 4.215397e+04, 9891 iterations, 0.68 seconds

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

     0     0 42153.9707    0   11 56802.0000 42153.9707  25.8%     -    0s
H    0     0                    42158.000000 42153.9707  0.01%     -    1s

Explored 0 nodes (9906 simplex iterations) in 1.01 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.215800000000e+04, best bound 4.215400000000e+04, gap 0.0095%