Gurobi 5.0.1 (linux64) logging started Sat Nov 17 23:38:06 2012

Optimize a model with 63 rows, 56 columns and 211 nonzeros
Presolve time: 0.00s
Presolved: 63 rows, 56 columns, 211 nonzeros
Variable types: 0 continuous, 56 integer (56 binary)
Found heuristic solution: objective 15.0000000
Found heuristic solution: objective 13.0000000

Root relaxation: objective 0.000000e+00, 37 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   24   13.00000    0.00000   100%     -    0s
H    0     0                      11.0000000    0.00000   100%     -    0s
H    0     0                       9.0000000    0.00000   100%     -    0s
     0     0    0.50000    0   25    9.00000    0.50000  94.4%     -    0s
     0     0    1.00000    0   24    9.00000    1.00000  88.9%     -    0s
     0     0    1.00000    0   27    9.00000    1.00000  88.9%     -    0s
     0     0    1.00000    0   24    9.00000    1.00000  88.9%     -    0s
H    0     0                       8.0000000    1.00000  87.5%     -    0s
H    0     0                       6.0000000    1.00000  83.3%     -    0s
     0     2    1.00000    0   24    6.00000    1.00000  83.3%     -    0s
*    9     3               3       5.0000000    2.10000  58.0%  19.9    0s
*   12     2               4       4.0000000    2.10000  47.5%  15.7    0s

Cutting planes:
  Gomory: 1
  Zero half: 2

Explored 17 nodes (399 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%