Gurobi 5.0.1 (linux64) logging started Fri Nov 16 01:09:16 2012

Optimize a model with 3081 rows, 552 columns and 9681 nonzeros
Presolve removed 2 rows and 2 columns
Presolve time: 0.07s
Presolved: 3102 rows, 550 columns, 16849 nonzeros
Variable types: 0 continuous, 550 integer (550 binary)
Found heuristic solution: objective 23.0000000

Root relaxation: objective 5.000000e+00, 2979 iterations, 0.25 seconds

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

     0     0    5.00000    0   86   23.00000    5.00000  78.3%     -    0s
H    0     0                       7.0000000    5.00000  28.6%     -    0s
     0     0    5.00000    0  150    7.00000    5.00000  28.6%     -    0s
     0     0    5.00000    0   96    7.00000    5.00000  28.6%     -    1s
     0     0    5.00000    0   89    7.00000    5.00000  28.6%     -    2s
     0     0    5.00000    0  114    7.00000    5.00000  28.6%     -    2s
     0     0    5.00000    0  464    7.00000    5.00000  28.6%     -    3s
H    0     0                       6.0000000    5.00000  16.7%     -    3s
     0     0    5.00000    0  449    6.00000    5.00000  16.7%     -    3s
     0     0 infeasible    0         6.00000    5.00001  16.7%     -    3s

Cutting planes:
  Clique: 10
  Zero half: 37

Explored 0 nodes (20968 simplex iterations) in 3.80 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%