Gurobi 5.0.1 (linux64) logging started Sun Nov 18 06:42:03 2012

Optimize a model with 509 rows, 474 columns and 1744 nonzeros
Presolve removed 0 rows and 17 columns
Presolve time: 0.00s
Presolved: 509 rows, 457 columns, 1727 nonzeros
Variable types: 0 continuous, 457 integer (456 binary)
Found heuristic solution: objective 77.0000000

Root relaxation: objective 0.000000e+00, 235 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  191   77.00000    0.00000   100%     -    0s
H    0     0                      63.0000000    0.00000   100%     -    0s
     0     0    0.25457    0  193   63.00000    0.25457   100%     -    0s
H    0     0                      57.0000000    0.25457   100%     -    0s
     0     0    0.68969    0  195   57.00000    0.68969  98.8%     -    0s
H    0     0                      54.0000000    0.68969  98.7%     -    0s
     0     0    0.69142    0  196   54.00000    0.69142  98.7%     -    0s
     0     0    0.69142    0  195   54.00000    0.69142  98.7%     -    0s
H    0     0                      53.0000000    0.69142  98.7%     -    0s
     0     2    0.69301    0  195   53.00000    0.69301  98.7%     -    0s
H   27    27                      41.0000000    1.00000  97.6%  31.0    0s
*   44    38              30      18.0000000    1.00000  94.4%  26.1    0s
  3511   196     cutoff   26        18.00000   14.81752  17.7%  24.6    5s

Explored 4031 nodes (97983 simplex iterations) in 5.61 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 1.800000000000e+01, best bound 1.800000000000e+01, gap 0.0%