Gurobi 5.0.1 (linux64) logging started Mon Feb  4 17:24:09 2013

Optimize a model with 6017 rows, 1089 columns and 18513 nonzeros
Presolve removed 851 rows and 556 columns
Presolve time: 0.03s
Presolved: 5166 rows, 533 columns, 15948 nonzeros
Variable types: 15 continuous, 518 integer (518 binary)
Found heuristic solution: objective 25745.000000

Root relaxation: objective 2.043633e+04, 2411 iterations, 0.06 seconds

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

     0     0 20436.3333    0    8 25745.0000 20436.3333  20.6%     -    0s
H    0     0                    20457.000000 20436.3333  0.10%     -    0s
H    0     0                    20450.000000 20436.3333  0.07%     -    0s
H    0     0                    20445.000000 20436.3333  0.04%     -    0s
     0     0 20436.3333    0   12 20445.0000 20436.3333  0.04%     -    0s
     0     0 20436.3333    0    8 20445.0000 20436.3333  0.04%     -    0s
     0     0 20437.0000    0   11 20445.0000 20437.0000  0.04%     -    0s
     0     2 20437.0000    0    7 20445.0000 20437.0000  0.04%     -    0s

Cutting planes:
  Gomory: 5
  Cover: 3
  MIR: 30
  Zero half: 5

Explored 66 nodes (3589 simplex iterations) in 0.25 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 2.044500000000e+04, best bound 2.044400000000e+04, gap 0.0049%