Gurobi 5.0.1 (linux64) logging started Mon Feb  4 16:17:29 2013

Optimize a model with 832 rows, 13257 columns and 534794 nonzeros
Presolve removed 44 rows and 292 columns
Presolve time: 4.36s
Presolved: 788 rows, 12965 columns, 521139 nonzeros
Variable types: 0 continuous, 12965 integer (12965 binary)
Found heuristic solution: objective 5815.0000000

Root relaxation: objective 4.509833e+03, 2734 iterations, 0.67 seconds

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

     0     0 4509.83333    0   49 5815.00000 4509.83333  22.4%     -    5s
H    0     0                    4613.0000000 4509.83333  2.24%     -    5s
     0     0 4516.00000    0   49 4613.00000 4516.00000  2.10%     -    6s
H    0     0                    4609.0000000 4516.00000  2.02%     -    7s
     0     0 4516.00000    0   49 4609.00000 4516.00000  2.02%     -    8s
     0     0 4517.77778    0   76 4609.00000 4517.77778  1.98%     -    8s
H    0     0                    4569.0000000 4517.77778  1.12%     -    9s
*    0     0               0    4519.0000000 4519.00000   0.0%     -    9s

Cutting planes:
  Clique: 12
  Zero half: 24

Explored 0 nodes (6112 simplex iterations) in 9.34 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.519000000000e+03, best bound 4.519000000000e+03, gap 0.0%