Gurobi 5.0.1 (linux64) logging started Fri Nov 16 01:06:18 2012

Optimize a model with 479 rows, 156 columns and 1534 nonzeros
Presolve removed 278 rows and 2 columns
Presolve time: 0.00s
Presolved: 213 rows, 154 columns, 1104 nonzeros
Variable types: 0 continuous, 154 integer (154 binary)
Found heuristic solution: objective 12.0000000

Root relaxation: objective 4.000000e+00, 266 iterations, 0.00 seconds

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

     0     0    4.00000    0   18   12.00000    4.00000  66.7%     -    0s
H    0     0                       6.0000000    4.00000  33.3%     -    0s
H    0     0                       5.0000000    4.00000  20.0%     -    0s
     0     0    4.00000    0   22    5.00000    4.00000  20.0%     -    0s
H    0     0                       4.0000000    4.00000   0.0%     -    0s

Cutting planes:
  Zero half: 2

Explored 0 nodes (590 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%