Gurobi 5.0.1 (linux64) logging started Mon Feb  4 18:22:33 2013

Optimize a model with 9177 rows, 1444 columns and 28158 nonzeros
Presolve removed 1113 rows and 735 columns
Presolve time: 0.06s
Presolved: 8064 rows, 709 columns, 24787 nonzeros
Variable types: 17 continuous, 692 integer (692 binary)
Found heuristic solution: objective 38217.000000

Root relaxation: objective 3.118936e+04, 4547 iterations, 0.16 seconds

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

     0     0 31189.3571    0    6 38217.0000 31189.3571  18.4%     -    0s
H    0     0                    31201.000000 31189.3571  0.04%     -    0s
H    0     0                    31195.000000 31189.3571  0.02%     -    0s
     0     0 31192.7293    0   14 31195.0000 31192.7293  0.01%     -    0s

Cutting planes:
  Gomory: 4
  Implied bound: 2
  MIR: 6
  Mod-K: 2

Explored 0 nodes (4602 simplex iterations) in 0.29 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 3.119500000000e+04, best bound 3.119300000000e+04, gap 0.0064%