Gurobi 5.0.1 (linux64) logging started Sat Nov 17 23:38:10 2012

Optimize a model with 67 rows, 59 columns and 224 nonzeros
Presolve time: 0.00s
Presolved: 67 rows, 59 columns, 224 nonzeros
Variable types: 0 continuous, 59 integer (59 binary)
Found heuristic solution: objective 14.0000000

Root relaxation: objective 0.000000e+00, 38 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   25   14.00000    0.00000   100%     -    0s
H    0     0                      12.0000000    0.00000   100%     -    0s
H    0     0                      10.0000000    0.00000   100%     -    0s
H    0     0                       6.0000000    0.00000   100%     -    0s
     0     0    0.73636    0   30    6.00000    0.73636  87.7%     -    0s
     0     0    0.75636    0   32    6.00000    0.75636  87.4%     -    0s
     0     0    0.81190    0   30    6.00000    0.81190  86.5%     -    0s
     0     2    0.82500    0   30    6.00000    0.82500  86.3%     -    0s
*   11     7               9       5.0000000    2.53846  49.2%  11.5    0s
*   15     3               3       4.0000000    2.71429  32.1%   9.5    0s

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

Explored 19 nodes (273 simplex iterations) in 0.01 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%