Gurobi 5.0.1 (linux64) logging started Mon Feb  4 18:54:38 2013

Optimize a model with 20875 rows, 2500 columns and 63750 nonzeros
Presolve removed 2323 rows and 1274 columns
Presolve time: 0.16s
Presolved: 18552 rows, 1226 columns, 56781 nonzeros
Variable types: 24 continuous, 1202 integer (1202 binary)
Found heuristic solution: objective 50410.000000

Root relaxation: objective 3.700373e+04, 7371 iterations, 0.33 seconds

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

     0     0 37003.7273    0   20 50410.0000 37003.7273  26.6%     -    0s
H    0     0                    37023.000000 37003.7273  0.05%     -    0s
H    0     0                    37022.000000 37003.7273  0.05%     -    0s
     0     0 37003.7273    0   20 37022.0000 37003.7273  0.05%     -    0s
     0     0 37003.7273    0   13 37022.0000 37003.7273  0.05%     -    0s
H    0     0                    37013.000000 37003.7273  0.03%     -    0s
     0     0 37003.7273    0   22 37013.0000 37003.7273  0.03%     -    0s
     0     2 37003.7273    0   15 37013.0000 37003.7273  0.03%     -    1s
H    1     2                    37012.000000 37003.7273  0.02%  75.0    1s
H  309   109                    37010.000000 37004.7563  0.01%  13.6    1s

Cutting planes:
  Gomory: 9
  Cover: 2
  Implied bound: 13
  Clique: 1
  MIR: 30
  Zero half: 11

Explored 1562 nodes (24327 simplex iterations) in 1.74 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 3.701000000000e+04, best bound 3.700700000000e+04, gap 0.0081%