Gurobi 5.0.1 (linux64) logging started Mon Feb  4 17:24:08 2013

Optimize a model with 6017 rows, 1089 columns and 18513 nonzeros
Presolve removed 814 rows and 551 columns
Presolve time: 0.05s
Presolved: 5203 rows, 538 columns, 16179 nonzeros
Variable types: 19 continuous, 519 integer (519 binary)
Found heuristic solution: objective 22061.000000
Found heuristic solution: objective 20889.000000

Root relaxation: objective 1.585770e+04, 2543 iterations, 0.07 seconds

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

     0     0 15857.6991    0   11 20889.0000 15857.6991  24.1%     -    0s
H    0     0                    15898.000000 15857.6991  0.25%     -    0s
H    0     0                    15871.000000 15857.6991  0.08%     -    0s
H    0     0                    15864.000000 15857.6991  0.04%     -    0s
     0     0 15858.3943    0   17 15864.0000 15858.3943  0.04%     -    0s
     0     0 15858.3943    0    9 15864.0000 15858.3943  0.04%     -    0s
     0     0 15858.4310    0   19 15864.0000 15858.4310  0.04%     -    0s
     0     1 15858.4325    0   19 15864.0000 15858.4325  0.04%     -    0s
H    4     3                    15862.000000 15859.5645  0.02%   0.0    0s

Cutting planes:
  Gomory: 4
  Cover: 4
  Clique: 1
  MIR: 12
  Zero half: 3

Explored 6 nodes (2835 simplex iterations) in 0.22 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 1.586200000000e+04, best bound 1.586100000000e+04, gap 0.0063%