Gurobi 5.0.1 (linux64) logging started Fri Jan 18 01:40:20 2013

Optimize a model with 128 rows, 344 columns and 882 nonzeros
Presolve removed 115 rows and 301 columns
Presolve time: 0.00s
Presolved: 13 rows, 43 columns, 86 nonzeros
Variable types: 36 continuous, 7 integer (7 binary)

Root relaxation: objective 3.881594e+03, 5 iterations, 0.00 seconds

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

     0     0 3881.59364    0    1          - 3881.59364     -      -    0s
H    0     0                    3893.8897177 3881.59364  0.32%     -    0s
     0     0 3881.86365    0    1 3893.88972 3881.86365  0.31%     -    0s
     0     0 3893.87084    0    2 3893.88972 3893.87084  0.00%     -    0s

Cutting planes:
  Cover: 2
  Flow cover: 3

Explored 0 nodes (14 simplex iterations) in 0.00 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 3.893889717662e+03, best bound 3.893870837202e+03, gap 0.0005%