Gurobi 5.0.1 (linux64) logging started Sat Nov 17 19:52:19 2012

Optimize a model with 73 rows, 48 columns and 228 nonzeros
Presolve time: 0.00s
Presolved: 73 rows, 48 columns, 228 nonzeros
Variable types: 0 continuous, 48 integer (48 binary)
Found heuristic solution: objective 19.0000000

Root relaxation: objective 0.000000e+00, 18 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   12   19.00000    0.00000   100%     -    0s
     0     0    0.75000    0   14   19.00000    0.75000  96.1%     -    0s
     0     0    0.81022    0   21   19.00000    0.81022  95.7%     -    0s
H    0     0                      15.0000000    0.81022  94.6%     -    0s
     0     0    0.91667    0   14   15.00000    0.91667  93.9%     -    0s
     0     0    1.00000    0   14   15.00000    1.00000  93.3%     -    0s
     0     0    1.08333    0   16   15.00000    1.08333  92.8%     -    0s
     0     0    1.11180    0   23   15.00000    1.11180  92.6%     -    0s
     0     0    1.16593    0   27   15.00000    1.16593  92.2%     -    0s
     0     0    1.30882    0   31   15.00000    1.30882  91.3%     -    0s
     0     0    1.37626    0   38   15.00000    1.37626  90.8%     -    0s
     0     0    1.41667    0   15   15.00000    1.41667  90.6%     -    0s
     0     0    1.41667    0   15   15.00000    1.41667  90.6%     -    0s
     0     2    1.53431    0   15   15.00000    1.53431  89.8%     -    0s

Cutting planes:
  Gomory: 1
  Mod-K: 9

Explored 71 nodes (558 simplex iterations) in 0.02 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 1.500000000000e+01, best bound 1.500000000000e+01, gap 0.0%