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

Optimize a model with 587 rows, 50 columns and 1174 nonzeros
Presolve removed 407 rows and 0 columns
Presolve time: 0.01s
Presolved: 180 rows, 50 columns, 961 nonzeros
Variable types: 0 continuous, 50 integer (50 binary)
Found heuristic solution: objective 6.0000000

Root relaxation: objective 9.615318e+00, 104 iterations, 0.00 seconds

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

     0     0    9.61532    0   45    6.00000    9.61532  60.3%     -    0s
H    0     0                       7.0000000    9.61532  37.4%     -    0s
     0     0    9.38334    0   48    7.00000    9.38334  34.0%     -    0s
H    0     0                       8.0000000    9.38334  17.3%     -    0s
     0     0    9.31555    0   45    8.00000    9.31555  16.4%     -    0s
     0     0    9.26240    0   46    8.00000    9.26240  15.8%     -    0s
     0     0    9.23656    0   48    8.00000    9.23656  15.5%     -    0s
     0     0    9.23311    0   49    8.00000    9.23311  15.4%     -    0s
     0     2    9.23253    0   49    8.00000    9.23253  15.4%     -    0s

Cutting planes:
  Gomory: 1
  Clique: 13
  Zero half: 10

Explored 6 nodes (355 simplex iterations) in 0.05 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 8.000000000000e+00, best bound 8.000000000000e+00, gap 0.0%