Gurobi 5.0.1 (linux64) logging started Mon Feb  4 18:53:56 2013

Optimize a model with 16261 rows, 2116 columns and 49726 nonzeros
Presolve removed 2340 rows and 1094 columns
Presolve time: 0.12s
Presolved: 13921 rows, 1022 columns, 42531 nonzeros
Variable types: 18 continuous, 1004 integer (1004 binary)
Found heuristic solution: objective 44132.000000

Root relaxation: objective 3.231375e+04, 5230 iterations, 0.23 seconds

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

     0     0 32313.7500    0    5 44132.0000 32313.7500  26.8%     -    0s
H    0     0                    32319.000000 32313.7500  0.02%     -    0s
     0     0 32315.2594    0   15 32319.0000 32315.2594  0.01%     -    0s
     0     0 32315.2594    0    7 32319.0000 32315.2594  0.01%     -    0s
     0     0 32315.6113    0   13 32319.0000 32315.6113  0.01%     -    0s
     0     0 32315.9039    0   17 32319.0000 32315.9039  0.01%     -    0s

Cutting planes:
  Gomory: 1
  Cover: 3
  Implied bound: 2
  MIR: 9
  Zero half: 3
  Mod-K: 2

Explored 0 nodes (5526 simplex iterations) in 0.52 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 3.231900000000e+04, best bound 3.231600000000e+04, gap 0.0093%