Gurobi 5.0.1 (linux64) logging started Sat Nov 17 23:38:01 2012

Optimize a model with 63 rows, 55 columns and 210 nonzeros
Presolve time: 0.00s
Presolved: 63 rows, 55 columns, 210 nonzeros
Variable types: 0 continuous, 55 integer (55 binary)
Found heuristic solution: objective 11.0000000

Root relaxation: objective 0.000000e+00, 31 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   22   11.00000    0.00000   100%     -    0s
H    0     0                       6.0000000    0.00000   100%     -    0s
     0     0    0.61350    0   24    6.00000    0.61350  89.8%     -    0s
     0     0    1.18415    0   25    6.00000    1.18415  80.3%     -    0s
     0     0    1.49559    0   28    6.00000    1.49559  75.1%     -    0s
     0     0    1.50397    0   29    6.00000    1.50397  74.9%     -    0s
     0     2    1.52404    0   29    6.00000    1.52404  74.6%     -    0s
*    8     4               7       4.0000000    2.87768  28.1%  10.4    0s

Cutting planes:
  Gomory: 4
  Mod-K: 2

Explored 13 nodes (238 simplex iterations) in 0.03 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%