Gurobi 5.0.1 (linux64) logging started Wed Apr 24 00:52:39 2013

Optimize a model with 6550 rows, 6300 columns and 25050 nonzeros
Presolve removed 25 rows and 0 columns
Presolve time: 0.03s
Presolved: 6525 rows, 6300 columns, 25025 nonzeros
Variable types: 6275 continuous, 25 integer (25 binary)

Root relaxation: objective 2.019355e+04, 913 iterations, 0.06 seconds

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

     0     0 20193.5457    0   21          - 20193.5457     -      -    0s
H    0     0                    22940.000000 20193.5457  12.0%     -    0s
     0     0 21829.6374    0    3 22940.0000 21829.6374  4.84%     -    0s
H    0     0                    22596.671114 21829.6374  3.39%     -    0s
H    0     0                    21921.000000 21829.6374  0.42%     -    0s
     0     2 21850.7419    0    2 21921.0000 21850.7419  0.32%     -    0s
*    2     2               2    21886.000000 21886.0000   0.0%  16.0    0s

Cutting planes:
  Implied bound: 18

Explored 3 nodes (1325 simplex iterations) in 0.37 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 2.188600000000e+04, best bound 2.188600000000e+04, gap 0.0%