Gurobi 5.0.1 (linux64) logging started Fri Jan 18 04:02:39 2013

Optimize a model with 828 rows, 844 columns and 3282 nonzeros
Presolve removed 778 rows and 778 columns
Presolve time: 0.01s
Presolved: 50 rows, 66 columns, 201 nonzeros
Variable types: 43 continuous, 23 integer (23 binary)

Root relaxation: objective 4.810927e+03, 30 iterations, 0.00 seconds

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

     0     0 4810.92679    0    2          - 4810.92679     -      -    0s
     0     0 4828.99369    0    2          - 4828.99369     -      -    0s
     0     0 4830.14781    0    4          - 4830.14781     -      -    0s
     0     0 4831.05492    0    4          - 4831.05492     -      -    0s
H    0     0                    4831.3317165 4831.05492  0.01%     -    0s

Cutting planes:
  Gomory: 1
  Cover: 1
  Flow cover: 2

Explored 0 nodes (67 simplex iterations) in 0.02 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.831331716518e+03, best bound 4.831054920536e+03, gap 0.0057%