Gurobi 5.0.1 (linux64) logging started Mon Feb  4 17:34:28 2013

Optimize a model with 6579 rows, 1156 columns and 20230 nonzeros
Presolve removed 860 rows and 587 columns
Presolve time: 0.04s
Presolved: 5719 rows, 569 columns, 17683 nonzeros
Variable types: 17 continuous, 552 integer (552 binary)
Found heuristic solution: objective 21438.000000

Root relaxation: objective 1.597512e+04, 2178 iterations, 0.06 seconds

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

     0     0 15975.1250    0    6 21438.0000 15975.1250  25.5%     -    0s
H    0     0                    15983.000000 15975.1250  0.05%     -    0s
     0     0 15976.7595    0   19 15983.0000 15976.7595  0.04%     -    0s
     0     0 15976.7595    0    9 15983.0000 15976.7595  0.04%     -    0s
     0     0 15976.9608    0   17 15983.0000 15976.9608  0.04%     -    0s
     0     1 15977.0370    0   17 15983.0000 15977.0370  0.04%     -    0s

Cutting planes:
  Gomory: 8
  Cover: 3
  MIR: 15
  GUB cover: 1
  Zero half: 7

Explored 27 nodes (2667 simplex iterations) in 0.23 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 1.598300000000e+04, best bound 1.598200000000e+04, gap 0.0063%