Gurobi 5.0.1 (linux64) logging started Fri Nov 16 01:10:10 2012

Optimize a model with 3599 rows, 600 columns and 11278 nonzeros
Presolve removed 2 rows and 2 columns
Presolve time: 0.07s
Presolved: 3597 rows, 598 columns, 18027 nonzeros
Variable types: 0 continuous, 598 integer (598 binary)

Root relaxation: objective 4.933333e+00, 2432 iterations, 0.14 seconds

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

     0     0    4.93333    0  227          -    4.93333     -      -    0s
H    0     0                      24.0000000    4.93333  79.4%     -    0s
     0     0    6.00000    0   87   24.00000    6.00000  75.0%     -    0s
H    0     0                       7.0000000    6.00000  14.3%     -    0s
     0     0    6.00000    0   18    7.00000    6.00000  14.3%     -    0s
     0     0    6.00000    0   26    7.00000    6.00000  14.3%     -    0s
     0     0    6.00000    0   50    7.00000    6.00000  14.3%     -    0s
     0     0    6.00000    0   39    7.00000    6.00000  14.3%     -    1s
     0     0    6.00000    0   12    7.00000    6.00000  14.3%     -    1s
     0     0    6.00000    0   26    7.00000    6.00000  14.3%     -    1s
     0     0    6.00000    0   16    7.00000    6.00000  14.3%     -    1s
     0     0    6.00000    0   39    7.00000    6.00000  14.3%     -    1s
     0     0    6.00000    0   53    7.00000    6.00000  14.3%     -    1s
     0     0    6.00000    0   34    7.00000    6.00000  14.3%     -    1s
     0     2    6.00000    0   34    7.00000    6.00000  14.3%     -    1s

Cutting planes:
  Zero half: 20

Explored 21 nodes (10693 simplex iterations) in 1.28 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 7.000000000000e+00, best bound 7.000000000000e+00, gap 0.0%