Gurobi 5.0.1 (linux64) logging started Fri Nov 16 01:12:18 2012

Optimize a model with 3899 rows, 650 columns and 12223 nonzeros
Presolve removed 2 rows and 2 columns
Presolve time: 0.07s
Presolved: 3922 rows, 648 columns, 20320 nonzeros
Variable types: 0 continuous, 648 integer (648 binary)
Found heuristic solution: objective 25.0000000

Root relaxation: objective 4.486486e+00, 3646 iterations, 0.28 seconds

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

     0     0    4.48649    0  318   25.00000    4.48649  82.1%     -    0s
     0     0    6.00000    0   81   25.00000    6.00000  76.0%     -    0s
H    0     0                      12.0000000    6.00000  50.0%     -    0s
H    0     0                       7.0000000    6.00000  14.3%     -    0s
     0     0    6.00000    0   16    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   49    7.00000    6.00000  14.3%     -    1s
     0     0    6.00000    0   18    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   16    7.00000    6.00000  14.3%     -    1s
     0     0    6.00000    0   18    7.00000    6.00000  14.3%     -    1s
     0     0    6.00000    0   42    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   31    7.00000    6.00000  14.3%     -    1s
     0     0    6.00000    0   28    7.00000    6.00000  14.3%     -    1s
     0     2    6.00000    0   28    7.00000    6.00000  14.3%     -    1s

Cutting planes:
  Clique: 2
  Zero half: 1

Explored 5 nodes (10445 simplex iterations) in 1.38 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%