Gurobi 5.0.1 (linux64) logging started Sun Nov 18 06:37:29 2012

Optimize a model with 469 rows, 453 columns and 1623 nonzeros
Presolve removed 0 rows and 25 columns
Presolve time: 0.00s
Presolved: 469 rows, 428 columns, 1598 nonzeros
Variable types: 0 continuous, 428 integer (427 binary)
Found heuristic solution: objective 84.0000000

Root relaxation: objective 0.000000e+00, 260 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  175   84.00000    0.00000   100%     -    0s
H    0     0                      61.0000000    0.00000   100%     -    0s
H    0     0                      52.0000000    0.00000   100%     -    0s
     0     0    0.25000    0  177   52.00000    0.25000   100%     -    0s
H    0     0                      46.0000000    0.25000  99.5%     -    0s
H    0     0                      42.0000000    0.25000  99.4%     -    0s
     0     0    0.76989    0  180   42.00000    0.76989  98.2%     -    0s
H    0     0                      38.0000000    0.76989  98.0%     -    0s
     0     0    0.77192    0  183   38.00000    0.77192  98.0%     -    0s
     0     0    0.77192    0  183   38.00000    0.77192  98.0%     -    0s
     0     2    0.77892    0  183   38.00000    0.77892  98.0%     -    0s
H   27    27                      30.0000000    1.00000  96.7%  51.5    0s
*   42    41              27      16.0000000    1.00000  93.8%  38.9    0s
*  222   131              27      15.0000000    1.08829  92.7%  35.9    0s

Cutting planes:
  Gomory: 4
  Zero half: 5
  Mod-K: 1

Explored 1577 nodes (43308 simplex iterations) in 2.19 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%