Gurobi 5.0.1 (linux64) logging started Wed Apr 24 00:51:54 2013

Optimize a model with 4240 rows, 4040 columns and 16040 nonzeros
Presolve removed 20 rows and 0 columns
Presolve time: 0.02s
Presolved: 4220 rows, 4040 columns, 16020 nonzeros
Variable types: 4020 continuous, 20 integer (20 binary)

Root relaxation: objective 2.082623e+04, 541 iterations, 0.03 seconds

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

     0     0 20826.2270    0   13          - 20826.2270     -      -    0s
H    0     0                    21996.000000 20826.2270  5.32%     -    0s
*    0     0               0    21511.000000 21511.0000   0.0%     -    0s

Cutting planes:
  Gomory: 10
  Implied bound: 12

Explored 0 nodes (655 simplex iterations) in 0.11 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 2.151100000000e+04, best bound 2.151100000000e+04, gap 0.0%