Gurobi 5.0.1 (linux64) logging started Mon Feb  4 19:01:43 2013

Optimize a model with 50183 rows, 4489 columns and 152626 nonzeros
Presolve removed 3672 rows and 2275 columns
Presolve time: 0.34s
Presolved: 46511 rows, 2214 columns, 141133 nonzeros
Variable types: 25 continuous, 2189 integer (2189 binary)
Found heuristic solution: objective 112265.00000

Root relaxation: objective 8.867590e+04, 11662 iterations, 1.02 seconds

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

     0     0 88675.9048    0    9 112265.000 88675.9048  21.0%     -    1s
H    0     0                    88695.000000 88675.9048  0.02%     -    1s
H    0     0                    88688.000000 88675.9048  0.01%     -    1s
     0     0 88676.5882    0   13 88688.0000 88676.5882  0.01%     -    1s
     0     0 88676.5882    0    8 88688.0000 88676.5882  0.01%     -    2s
     0     0 88676.5882    0   13 88688.0000 88676.5882  0.01%     -    2s
H    0     0                    88685.000000 88676.5882  0.01%     -    2s

Cutting planes:
  MIR: 8
  Zero half: 1

Explored 0 nodes (13483 simplex iterations) in 2.12 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 8.868500000000e+04, best bound 8.867700000000e+04, gap 0.0090%