Gurobi 5.0.1 (linux64) logging started Mon Feb  4 18:54:18 2013

Optimize a model with 18472 rows, 2304 columns and 56448 nonzeros
Presolve removed 2308 rows and 1179 columns
Presolve time: 0.14s
Presolved: 16164 rows, 1125 columns, 49526 nonzeros
Variable types: 23 continuous, 1102 integer (1102 binary)
Found heuristic solution: objective 51430.000000

Root relaxation: objective 3.776306e+04, 7341 iterations, 0.35 seconds

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

     0     0 37763.0551    0    8 51430.0000 37763.0551  26.6%     -    0s
H    0     0                    37774.000000 37763.0551  0.03%     -    0s
H    0     0                    37765.000000 37763.0551  0.01%     -    0s

Explored 0 nodes (7366 simplex iterations) in 0.56 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 3.776500000000e+04, best bound 3.776400000000e+04, gap 0.0026%