Gurobi 5.0.1 (linux64) logging started Mon Feb  4 16:34:24 2013

Optimize a model with 2625 rows, 625 columns and 8125 nonzeros
Presolve removed 379 rows and 314 columns
Presolve time: 0.02s
Presolved: 2246 rows, 311 columns, 7045 nonzeros
Variable types: 14 continuous, 297 integer (297 binary)
Found heuristic solution: objective 11970.000000

Root relaxation: objective 8.681491e+03, 1752 iterations, 0.04 seconds

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

     0     0 8681.49107    0    6 11970.0000 8681.49107  27.5%     -    0s
H    0     0                    8690.0000000 8681.49107  0.10%     -    0s
H    0     0                    8688.0000000 8681.49107  0.07%     -    0s
     0     0 8683.83868    0   11 8688.00000 8683.83868  0.05%     -    0s
     0     0 8683.83868    0    7 8688.00000 8683.83868  0.05%     -    0s
     0     0 8684.14748    0   13 8688.00000 8684.14748  0.04%     -    0s
     0     0 8685.53882    0   12 8688.00000 8685.53882  0.03%     -    0s
     0     1 8685.56292    0   12 8688.00000 8685.56292  0.03%     -    0s

Cutting planes:
  Gomory: 1
  Implied bound: 1
  MIR: 2
  GUB cover: 1

Explored 1 nodes (1835 simplex iterations) in 0.09 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 8.688000000000e+03, best bound 8.688000000000e+03, gap 0.0%