Gurobi 5.0.1 (linux64) logging started Sun Nov 18 06:48:17 2012

Optimize a model with 553 rows, 498 columns and 1878 nonzeros
Presolve removed 0 rows and 10 columns
Presolve time: 0.00s
Presolved: 553 rows, 488 columns, 1868 nonzeros
Variable types: 0 continuous, 488 integer (487 binary)
Found heuristic solution: objective 105.0000000

Root relaxation: objective 0.000000e+00, 276 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  204  105.00000    0.00000   100%     -    0s
H    0     0                      94.0000000    0.00000   100%     -    0s
H    0     0                      72.0000000    0.00000   100%     -    0s
H    0     0                      68.0000000    0.00000   100%     -    0s
     0     0    0.44246    0  206   68.00000    0.44246  99.3%     -    0s
H    0     0                      53.0000000    0.44246  99.2%     -    0s
     0     0    0.69647    0  206   53.00000    0.69647  98.7%     -    0s
H    0     0                      50.0000000    0.69647  98.6%     -    0s
     0     0    0.69647    0  206   50.00000    0.69647  98.6%     -    0s
H    0     0                      48.0000000    0.69647  98.5%     -    0s
     0     2    0.73402    0  206   48.00000    0.73402  98.5%     -    0s
H   27    27                      38.0000000    1.00000  97.4%  38.8    0s
*   70    54              43      25.0000000    1.00000  96.0%  23.3    0s
H  134    57                      20.0000000    2.35309  88.2%  22.9    0s
H  444   169                      19.0000000    6.03704  68.2%  28.8    0s
  2995   312   17.37126   21  201   19.00000   13.26923  30.2%  28.2    5s

Explored 4813 nodes (131240 simplex iterations) in 7.72 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 1.900000000000e+01, best bound 1.900000000000e+01, gap 0.0%