Gurobi 5.0.1 (linux64) logging started Wed Apr 24 00:51:59 2013

Optimize a model with 4662 rows, 4452 columns and 17682 nonzeros
Presolve removed 21 rows and 0 columns
Presolve time: 0.02s
Presolved: 4641 rows, 4452 columns, 17661 nonzeros
Variable types: 4431 continuous, 21 integer (21 binary)

Root relaxation: objective 2.037923e+04, 632 iterations, 0.03 seconds

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

     0     0 20379.2307    0   13          - 20379.2307     -      -    0s
H    0     0                    21747.000000 20379.2307  6.29%     -    0s
     0     0     cutoff    0      21747.0000 21747.0000   0.0%     -    0s

Cutting planes:
  Gomory: 6
  Implied bound: 13

Explored 0 nodes (767 simplex iterations) in 0.12 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 2.174700000000e+04, best bound 2.174700000000e+04, gap 0.0%