Gurobi 5.0.1 (linux64) logging started Sun Nov 18 07:31:05 2012

Optimize a model with 535 rows, 497 columns and 1832 nonzeros
Presolve removed 0 rows and 28 columns
Presolve time: 0.00s
Presolved: 535 rows, 469 columns, 1804 nonzeros
Variable types: 0 continuous, 469 integer (468 binary)
Found heuristic solution: objective 94.0000000

Root relaxation: objective 0.000000e+00, 247 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  193   94.00000    0.00000   100%     -    0s
H    0     0                      60.0000000    0.00000   100%     -    0s
     0     0    0.24597    0  195   60.00000    0.24597   100%     -    0s
H    0     0                      47.0000000    0.24597  99.5%     -    0s
     0     0    0.71780    0  200   47.00000    0.71780  98.5%     -    0s
H    0     0                      33.0000000    0.71780  97.8%     -    0s
     0     2    0.71798    0  200   33.00000    0.71798  97.8%     -    0s
H   45    45                      28.0000000    1.00000  96.4%  29.9    0s
H   54    54                      25.0000000    1.00000  96.0%  26.3    0s
*   66    57              37      22.0000000    1.00000  95.5%  24.5    0s
H  108    59                      19.0000000    1.00000  94.7%  24.2    0s
*  144    73              23      18.0000000    1.00000  94.4%  25.9    0s

Explored 1442 nodes (49664 simplex iterations) in 2.35 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%