Gurobi 5.0.1 (linux64) logging started Mon Feb  4 18:55:23 2013

Optimize a model with 23478 rows, 2704 columns and 71656 nonzeros
Presolve removed 1996 rows and 1369 columns
Presolve time: 0.16s
Presolved: 21482 rows, 1335 columns, 65524 nonzeros
Variable types: 22 continuous, 1313 integer (1313 binary)
Found heuristic solution: objective 56547.000000

Root relaxation: objective 4.218073e+04, 8854 iterations, 0.49 seconds

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

     0     0 42180.7333    0   11 56547.0000 42180.7333  25.4%     -    0s
H    0     0                    42196.000000 42180.7333  0.04%     -    0s
H    0     0                    42187.000000 42180.7333  0.01%     -    0s
     0     0 42181.9760    0   24 42187.0000 42181.9760  0.01%     -    0s
     0     0 42181.9760    0   10 42187.0000 42181.9760  0.01%     -    0s
     0     0 42182.4320    0   24 42187.0000 42182.4320  0.01%     -    0s
     0     0 42183.9173    0   24 42187.0000 42183.9173  0.01%     -    0s

Cutting planes:
  Implied bound: 7
  MIR: 14
  Zero half: 3

Explored 0 nodes (9257 simplex iterations) in 0.94 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.218700000000e+04, best bound 4.218400000000e+04, gap 0.0071%