Gurobi 5.0.1 (linux64) logging started Fri Nov 16 01:17:06 2012

Optimize a model with 4237 rows, 702 columns and 13284 nonzeros
Presolve removed 2 rows and 2 columns
Presolve time: 0.07s
Presolved: 4261 rows, 700 columns, 21522 nonzeros
Variable types: 0 continuous, 700 integer (700 binary)
Found heuristic solution: objective 26.0000000

Root relaxation: objective 4.285714e+00, 3700 iterations, 0.25 seconds

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

     0     0    4.28571    0  353   26.00000    4.28571  83.5%     -    0s
H    0     0                      24.0000000    4.28571  82.1%     -    0s
     0     0    6.00000    0   73   24.00000    6.00000  75.0%     -    0s
H    0     0                      18.0000000    6.00000  66.7%     -    0s
H    0     0                      16.0000000    6.00000  62.5%     -    0s
H    0     0                       7.0000000    6.00000  14.3%     -    0s
H    0     0                       6.0000000    6.00000   0.0%     -    0s

Cutting planes:
  Zero half: 1

Explored 0 nodes (7128 simplex iterations) in 0.98 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 6.000000000000e+00, best bound 6.000000000000e+00, gap 0.0%