Gurobi 5.0.1 (linux64) logging started Mon Feb  4 17:43:50 2013

Optimize a model with 7175 rows, 1225 columns and 22050 nonzeros
Presolve removed 1096 rows and 632 columns
Presolve time: 0.04s
Presolved: 6079 rows, 593 columns, 18653 nonzeros
Variable types: 13 continuous, 580 integer (580 binary)
Found heuristic solution: objective 33278.000000

Root relaxation: objective 2.777581e+04, 1556 iterations, 0.05 seconds

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

     0     0 27775.8065    0    7 33278.0000 27775.8065  16.5%     -    0s
H    0     0                    27809.000000 27775.8065  0.12%     -    0s
H    0     0                    27793.000000 27775.8065  0.06%     -    0s
H    0     0                    27785.000000 27775.8065  0.03%     -    0s
     0     0 27778.3203    0   20 27785.0000 27778.3203  0.02%     -    0s
     0     0 27778.3203    0    6 27785.0000 27778.3203  0.02%     -    0s
     0     0 27778.4372    0   21 27785.0000 27778.4372  0.02%     -    0s
     0     0 27779.7284    0   23 27785.0000 27779.7284  0.02%     -    0s
     0     1 27779.8594    0   23 27785.0000 27779.8594  0.02%     -    0s

Cutting planes:
  Gomory: 5
  MIR: 7

Explored 21 nodes (1917 simplex iterations) in 0.20 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 2.778500000000e+04, best bound 2.778300000000e+04, gap 0.0072%