Gurobi 5.0.1 (linux64) logging started Mon Feb  4 18:57:09 2013

Optimize a model with 30913 rows, 3249 columns and 94221 nonzeros
Presolve removed 3121 rows and 1657 columns
Presolve time: 0.22s
Presolved: 27792 rows, 1592 columns, 84670 nonzeros
Variable types: 24 continuous, 1568 integer (1568 binary)
Found heuristic solution: objective 72607.000000

Root relaxation: objective 5.337196e+04, 8641 iterations, 0.58 seconds

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

     0     0 53371.9597    0   16 72607.0000 53371.9597  26.5%     -    0s
H    0     0                    53394.000000 53371.9597  0.04%     -    0s
H    0     0                    53384.000000 53371.9597  0.02%     -    0s
H    0     0                    53381.000000 53371.9597  0.02%     -    0s
     0     0 53372.0649    0   42 53381.0000 53372.0649  0.02%     -    1s
     0     0 53372.0649    0   19 53381.0000 53372.0649  0.02%     -    1s
     0     0 53372.0702    0   33 53381.0000 53372.0702  0.02%     -    1s
     0     2 53372.2021    0   33 53381.0000 53372.2021  0.02%     -    1s

Cutting planes:
  Gomory: 6
  Cover: 5
  Implied bound: 1
  MIR: 35
  Zero half: 7

Explored 234 nodes (15289 simplex iterations) in 1.79 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.338100000000e+04, best bound 5.337600000000e+04, gap 0.0094%