Gurobi 5.0.1 (linux64) logging started Sun Nov 18 03:09:59 2012

Optimize a model with 83 rows, 80 columns and 285 nonzeros
Presolve removed 0 rows and 6 columns
Presolve time: 0.00s
Presolved: 83 rows, 74 columns, 279 nonzeros
Variable types: 0 continuous, 74 integer (73 binary)
Found heuristic solution: objective 13.0000000

Root relaxation: objective 0.000000e+00, 46 iterations, 0.00 seconds

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

     0     0    0.00000    0   29   13.00000    0.00000   100%     -    0s
H    0     0                       9.0000000    0.00000   100%     -    0s
H    0     0                       4.0000000    0.00000   100%     -    0s
     0     0    0.34483    0   30    4.00000    0.34483  91.4%     -    0s
     0     0    1.00000    0   31    4.00000    1.00000  75.0%     -    0s
     0     0    1.00000    0   31    4.00000    1.00000  75.0%     -    0s
     0     0    1.00000    0   29    4.00000    1.00000  75.0%     -    0s
     0     2    1.00000    0   29    4.00000    1.00000  75.0%     -    0s

Cutting planes:
  Gomory: 2
  Zero half: 6
  Mod-K: 1

Explored 30 nodes (660 simplex iterations) in 0.02 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.000000000000e+00, best bound 4.000000000000e+00, gap 0.0%