Gurobi 5.0.1 (linux64) logging started Mon Nov 19 06:43:17 2012

Optimize a model with 600 rows, 49 columns and 1200 nonzeros
Presolve removed 431 rows and 0 columns
Presolve time: 0.01s
Presolved: 169 rows, 49 columns, 957 nonzeros
Variable types: 0 continuous, 49 integer (49 binary)
Found heuristic solution: objective 6.0000000

Root relaxation: objective 8.588552e+00, 97 iterations, 0.00 seconds

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

     0     0    8.58855    0   47    6.00000    8.58855  43.1%     -    0s
H    0     0                       7.0000000    8.58855  22.7%     -    0s
     0     0    8.40716    0   45    7.00000    8.40716  20.1%     -    0s
     0     0    8.34148    0   45    7.00000    8.34148  19.2%     -    0s
     0     0    8.31118    0   47    7.00000    8.31118  18.7%     -    0s
     0     0    8.31094    0   47    7.00000    8.31094  18.7%     -    0s
     0     2    8.30773    0   47    7.00000    8.30773  18.7%     -    0s

Cutting planes:
  Gomory: 1
  Clique: 13
  Zero half: 8

Explored 7 nodes (341 simplex iterations) in 0.05 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%