Gurobi 5.0.1 (linux64) logging started Wed Apr 24 00:52:53 2013

Optimize a model with 7072 rows, 6812 columns and 27092 nonzeros
Presolve removed 26 rows and 0 columns
Presolve time: 0.03s
Presolved: 7046 rows, 6812 columns, 27066 nonzeros
Variable types: 6786 continuous, 26 integer (26 binary)

Root relaxation: objective 2.908700e+04, 1245 iterations, 0.14 seconds

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

     0     0 29087.0034    0   21          - 29087.0034     -      -    0s
H    0     0                    31831.000000 29087.0034  8.62%     -    0s
     0     0     cutoff    0      31831.0000 31831.0000   0.0%     -    0s

Cutting planes:
  Gomory: 15
  Implied bound: 21

Explored 0 nodes (1554 simplex iterations) in 0.33 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 3.183100000000e+04, best bound 3.183100000000e+04, gap 0.0%