Gurobi 5.0.1 (linux64) logging started Mon Feb  4 18:57:52 2013

Optimize a model with 34279 rows, 3481 columns and 104430 nonzeros
Presolve removed 4887 rows and 1806 columns
Presolve time: 0.25s
Presolved: 29392 rows, 1675 columns, 89514 nonzeros
Variable types: 24 continuous, 1651 integer (1651 binary)
Found heuristic solution: objective 68734.000000

Root relaxation: objective 5.529994e+04, 8023 iterations, 0.58 seconds

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

     0     0 55299.9375    0    8 68734.0000 55299.9375  19.5%     -    0s
H    0     0                    55311.000000 55299.9375  0.02%     -    0s
     0     0 55301.6451    0   26 55311.0000 55301.6451  0.02%     -    1s
     0     0 55301.6451    0    8 55311.0000 55301.6451  0.02%     -    1s
H    0     0                    55308.000000 55301.6451  0.01%     -    1s
     0     0 55301.6799    0   27 55308.0000 55301.6799  0.01%     -    1s
     0     2 55301.7615    0   27 55308.0000 55301.7615  0.01%     -    1s

Cutting planes:
  Gomory: 5
  MIR: 8
  Zero half: 1

Explored 5 nodes (9295 simplex iterations) in 1.33 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.530800000000e+04, best bound 5.530300000000e+04, gap 0.0090%