Gurobi 5.0.1 (linux64) logging started Sun Nov 18 06:19:40 2012

Optimize a model with 469 rows, 447 columns and 1617 nonzeros
Presolve removed 0 rows and 23 columns
Presolve time: 0.00s
Presolved: 469 rows, 424 columns, 1594 nonzeros
Variable types: 0 continuous, 424 integer (423 binary)
Found heuristic solution: objective 84.0000000

Root relaxation: objective 0.000000e+00, 236 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  174   84.00000    0.00000   100%     -    0s
H    0     0                      57.0000000    0.00000   100%     -    0s
     0     0    0.23968    0  176   57.00000    0.23968   100%     -    0s
H    0     0                      44.0000000    0.23968  99.5%     -    0s
     0     0    0.77592    0  177   44.00000    0.77592  98.2%     -    0s
H    0     0                      33.0000000    0.77592  97.6%     -    0s
     0     0    0.77625    0  181   33.00000    0.77625  97.6%     -    0s
     0     0    0.77625    0  179   33.00000    0.77625  97.6%     -    0s
H    0     0                      30.0000000    0.77625  97.4%     -    0s
     0     2    0.77953    0  179   30.00000    0.77953  97.4%     -    0s
H   27    27                      27.0000000    1.00000  96.3%  27.7    0s
H   54    48                      17.0000000    1.00000  94.1%  22.4    0s
H   81    56                      15.0000000    1.00000  93.3%  25.3    0s

Explored 1597 nodes (46820 simplex iterations) in 2.05 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%