Gurobi 5.6.3 (linux64) logging started Tue Oct  7 20:26:49 2014

Optimize a model with 991 rows, 507 columns and 2420 nonzeros
Presolve removed 22 rows and 0 columns
Presolve time: 0.02s
Presolved: 969 rows, 507 columns, 2398 nonzeros
Variable types: 1 continuous, 506 integer (506 binary)
Found heuristic solution: objective 0.9297205
Found heuristic solution: objective 0.8983469
Found heuristic solution: objective 0.6112811

Root relaxation: objective 2.596052e-02, 533 iterations, 0.01 seconds

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

     0     0    0.02596    0  320    0.61128    0.02596  95.8%     -    0s
H    0     0                       0.6014301    0.02596  95.7%     -    0s
     0     0    0.02764    0  308    0.60143    0.02764  95.4%     -    0s
     0     0    0.24528    0  156    0.60143    0.24528  59.2%     -    0s
H    0     0                       0.5811642    0.24528  57.8%     -    0s
H    0     0                       0.5013748    0.24528  51.1%     -    0s
     0     0    0.26795    0  117    0.50137    0.26795  46.6%     -    0s
     0     0    0.27807    0  106    0.50137    0.27807  44.5%     -    0s
H    0     0                       0.4144435    0.27807  32.9%     -    0s
     0     0    0.37598    0   38    0.41444    0.37598  9.28%     -    0s
H    0     0                       0.4002760    0.37598  6.07%     -    0s
     0     1    0.37598    0   38    0.40028    0.37598  6.07%     -    0s

Explored 3 nodes (2871 simplex iterations) in 0.21 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.002760221446e-01, best bound 4.002760221446e-01, gap 0.0%