Gurobi 5.0.1 (linux64) logging started Mon Feb  4 16:00:46 2013

Optimize a model with 41 rows, 36 columns and 126 nonzeros
Presolve removed 27 rows and 21 columns
Presolve time: 0.00s
Presolved: 14 rows, 15 columns, 48 nonzeros
Variable types: 2 continuous, 13 integer (13 binary)
Found heuristic solution: objective 639.0000000

Root relaxation: objective 6.353014e+02, 1 iterations, 0.00 seconds

    Nodes    |    Current Node    |     Objective Bounds      |     Work
 Expl Unexpl |  Obj  Depth IntInf | Incumbent    BestBd   Gap | It/Node Time

     0     0  635.30137    0    1  639.00000  635.30137  0.58%     -    0s

Explored 0 nodes (1 simplex iterations) in 0.00 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 6.390000000000e+02, best bound 6.390000000000e+02, gap 0.0%