Gurobi 5.0.1 (linux64) logging started Mon Nov 19 06:43:12 2012

Optimize a model with 321 rows, 37 columns and 642 nonzeros
Presolve removed 218 rows and 0 columns
Presolve time: 0.00s
Presolved: 103 rows, 37 columns, 500 nonzeros
Variable types: 0 continuous, 37 integer (37 binary)
Found heuristic solution: objective 6.0000000

Root relaxation: objective 8.100000e+00, 47 iterations, 0.00 seconds

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

     0     0    8.10000    0   23    6.00000    8.10000  35.0%     -    0s
H    0     0                       7.0000000    8.10000  15.7%     -    0s
     0     0 infeasible    0         7.00000    7.99999  14.3%     -    0s

Cutting planes:
  Clique: 3
  Zero half: 3

Explored 0 nodes (58 simplex iterations) in 0.01 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%