Gurobi 5.0.1 (linux64) logging started Sun Nov 18 03:09:19 2012

Optimize a model with 59 rows, 59 columns and 204 nonzeros
Presolve removed 0 rows and 5 columns
Presolve time: 0.00s
Presolved: 59 rows, 54 columns, 199 nonzeros
Variable types: 0 continuous, 54 integer (53 binary)
Found heuristic solution: objective 13.0000000

Root relaxation: objective 0.000000e+00, 32 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                       8.0000000    0.00000   100%     -    0s
H    0     0                       5.0000000    0.00000   100%     -    0s
     0     0    0.44262    0   26    5.00000    0.44262  91.1%     -    0s
H    0     0                       4.0000000    0.44262  88.9%     -    0s
     0     0    0.97358    0   31    4.00000    0.97358  75.7%     -    0s
     0     0    0.97358    0   31    4.00000    0.97358  75.7%     -    0s
     0     2    1.00000    0   31    4.00000    1.00000  75.0%     -    0s

Cutting planes:
  Gomory: 4
  Zero half: 2

Explored 135 nodes (1339 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%