Gurobi 5.0.1 (linux64) logging started Fri Jan 18 07:07:37 2013

Optimize a model with 4028 rows, 4044 columns and 16082 nonzeros
Presolve removed 2054 rows and 2057 columns
Presolve time: 0.19s
Presolved: 1974 rows, 1987 columns, 5942 nonzeros
Variable types: 1003 continuous, 984 integer (984 binary)

Root relaxation: objective 5.281733e+03, 796 iterations, 0.03 seconds

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

     0     0 5281.73269    0    1          - 5281.73269     -      -    0s
H    0     0                    5327.1674700 5281.73269  0.85%     -    0s
     0     0 5296.31107    0    2 5327.16747 5296.31107  0.58%     -    0s
     0     0 5296.31107    0    1 5327.16747 5296.31107  0.58%     -    0s
*    0     0               0    5296.3130139 5296.31301   0.0%     -    0s

Cutting planes:
  Gomory: 1
  Implied bound: 2
  Flow cover: 2

Explored 0 nodes (1072 simplex iterations) in 0.30 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.296313013898e+03, best bound 5.296313013898e+03, gap 0.0%