Gurobi 5.0.1 (linux64) logging started Sun Nov 18 07:01:04 2012

Optimize a model with 557 rows, 503 columns and 1893 nonzeros
Presolve removed 0 rows and 13 columns
Presolve time: 0.00s
Presolved: 557 rows, 490 columns, 1880 nonzeros
Variable types: 0 continuous, 490 integer (489 binary)
Found heuristic solution: objective 114.0000000

Root relaxation: objective 0.000000e+00, 271 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  205  114.00000    0.00000   100%     -    0s
H    0     0                      79.0000000    0.00000   100%     -    0s
H    0     0                      67.0000000    0.00000   100%     -    0s
     0     0    0.32228    0  207   67.00000    0.32228   100%     -    0s
H    0     0                      64.0000000    0.32228  99.5%     -    0s
H    0     0                      40.0000000    0.32228  99.2%     -    0s
     0     0    0.74893    0  209   40.00000    0.74893  98.1%     -    0s
     0     0    0.74893    0  209   40.00000    0.74893  98.1%     -    0s
     0     2    0.79369    0  209   40.00000    0.79369  98.0%     -    0s
H   27    27                      35.0000000    1.00000  97.1%  43.7    0s
*   48    35              28      22.0000000    1.00000  95.5%  37.5    0s
H   87    44                      19.0000000    2.51034  86.8%  37.6    0s
*  269    89              12      18.0000000    5.00000  72.2%  41.4    0s

Cutting planes:
  Gomory: 3

Explored 908 nodes (34801 simplex iterations) in 1.55 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%