Gurobi 5.0.1 (linux64) logging started Mon Feb  4 17:01:13 2013

Optimize a model with 4525 rows, 900 columns and 13950 nonzeros
Presolve removed 997 rows and 475 columns
Presolve time: 0.04s
Presolved: 3528 rows, 425 columns, 10906 nonzeros
Variable types: 12 continuous, 413 integer (413 binary)
Found heuristic solution: objective 19443.000000

Root relaxation: objective 1.648344e+04, 1607 iterations, 0.04 seconds

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

     0     0 16483.4444    0    8 19443.0000 16483.4444  15.2%     -    0s
H    0     0                    16515.000000 16483.4444  0.19%     -    0s
H    0     0                    16492.000000 16483.4444  0.05%     -    0s
H    0     0                    16488.000000 16483.4444  0.03%     -    0s
     0     0 16485.9426    0   13 16488.0000 16485.9426  0.01%     -    0s
     0     0 16485.9426    0    6 16488.0000 16485.9426  0.01%     -    0s
     0     0     cutoff    0      16488.0000 16487.0165  0.01%     -    0s

Cutting planes:
  Gomory: 2
  Cover: 2
  Implied bound: 3
  Clique: 1
  MIR: 4

Explored 0 nodes (1685 simplex iterations) in 0.11 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 1.648800000000e+04, best bound 1.648800000000e+04, gap 0.0%