Gurobi 5.0.1 (linux64) logging started Sat Nov 17 23:37:47 2012

Optimize a model with 51 rows, 45 columns and 170 nonzeros
Presolve time: 0.00s
Presolved: 51 rows, 45 columns, 170 nonzeros
Variable types: 0 continuous, 45 integer (45 binary)
Found heuristic solution: objective 13.0000000

Root relaxation: objective 0.000000e+00, 26 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   19   13.00000    0.00000   100%     -    0s
H    0     0                       9.0000000    0.00000   100%     -    0s
H    0     0                       8.0000000    0.00000   100%     -    0s
     0     0    0.31034    0   21    8.00000    0.31034  96.1%     -    0s
H    0     0                       5.0000000    0.31034  93.8%     -    0s
     0     0    0.97691    0   22    5.00000    0.97691  80.5%     -    0s
     0     0    0.97713    0   23    5.00000    0.97713  80.5%     -    0s
H    0     0                       4.0000000    0.97713  75.6%     -    0s
     0     2    0.99375    0   23    4.00000    0.99375  75.2%     -    0s

Cutting planes:
  Gomory: 2
  Mod-K: 1

Explored 5 nodes (154 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%