Gurobi 5.0.1 (linux64) logging started Mon Feb  4 18:54:30 2013

Optimize a model with 19649 rows, 2401 columns and 60025 nonzeros
Presolve removed 3589 rows and 1262 columns
Presolve time: 0.14s
Presolved: 16060 rows, 1139 columns, 49007 nonzeros
Variable types: 18 continuous, 1121 integer (1121 binary)
Found heuristic solution: objective 52085.000000

Root relaxation: objective 3.800372e+04, 5311 iterations, 0.32 seconds

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

     0     0 38003.7222    0   10 52085.0000 38003.7222  27.0%     -    0s
H    0     0                    38021.000000 38003.7222  0.05%     -    0s
H    0     0                    38015.000000 38003.7222  0.03%     -    0s
     0     0 38003.7222    0   18 38015.0000 38003.7222  0.03%     -    0s
     0     0 38003.7222    0   11 38015.0000 38003.7222  0.03%     -    0s
     0     0 38003.7222    0   21 38015.0000 38003.7222  0.03%     -    0s
H    0     0                    38012.000000 38003.7222  0.02%     -    0s
     0     2 38003.7222    0   21 38012.0000 38003.7222  0.02%     -    0s
H  335   141                    38011.000000 38004.6044  0.02%   9.3    0s
*  693   220              45    38010.000000 38005.3000  0.01%   7.1    1s
H  815   170                    38009.000000 38005.6539  0.01%   6.9    1s

Cutting planes:
  Gomory: 6
  MIR: 20
  Zero half: 4

Explored 815 nodes (12840 simplex iterations) in 1.07 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 3.800900000000e+04, best bound 3.800600000000e+04, gap 0.0079%