Gurobi 5.0.1 (linux64) logging started Mon Feb  4 17:01:11 2013

Optimize a model with 4525 rows, 900 columns and 13950 nonzeros
Presolve removed 1055 rows and 475 columns
Presolve time: 0.03s
Presolved: 3470 rows, 425 columns, 10760 nonzeros
Variable types: 13 continuous, 412 integer (412 binary)
Found heuristic solution: objective 18522.000000

Root relaxation: objective 1.381449e+04, 1466 iterations, 0.04 seconds

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

     0     0 13814.4861    0    6 18522.0000 13814.4861  25.4%     -    0s
H    0     0                    13833.000000 13814.4861  0.13%     -    0s
H    0     0                    13825.000000 13814.4861  0.08%     -    0s
     0     0 13815.0156    0   18 13825.0000 13815.0156  0.07%     -    0s
     0     0 13815.0156    0    6 13825.0000 13815.0156  0.07%     -    0s
H    0     0                    13822.000000 13815.0156  0.05%     -    0s
     0     0 13815.0261    0   19 13822.0000 13815.0261  0.05%     -    0s
H    0     0                    13820.000000 13815.0261  0.04%     -    0s
     0     1 13815.0942    0   19 13820.0000 13815.0942  0.04%     -    0s
H    5     3                    13819.000000 13817.5556  0.01%   0.0    0s

Cutting planes:
  Gomory: 1
  Cover: 1
  MIR: 1
  GUB cover: 1
  Zero half: 4
  Mod-K: 2

Explored 7 nodes (1573 simplex iterations) in 0.14 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 1.381900000000e+04, best bound 1.381900000000e+04, gap 0.0%