Gurobi 5.0.1 (linux64) logging started Fri Nov 16 01:06:57 2012 Optimize a model with 2040 rows, 420 columns and 6460 nonzeros Presolve removed 1120 rows and 0 columns Presolve time: 0.03s Presolved: 920 rows, 420 columns, 5040 nonzeros Variable types: 0 continuous, 420 integer (420 binary) Found heuristic solution: objective 17.0000000 Root relaxation: objective 5.000000e+00, 1099 iterations, 0.05 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 5.00000 0 34 17.00000 5.00000 70.6% - 0s H 0 0 8.0000000 5.00000 37.5% - 0s H 0 0 6.0000000 5.00000 16.7% - 0s 0 0 5.00000 0 60 6.00000 5.00000 16.7% - 0s 0 0 5.00000 0 49 6.00000 5.00000 16.7% - 0s 0 0 5.00000 0 50 6.00000 5.00000 16.7% - 0s 0 0 5.00000 0 34 6.00000 5.00000 16.7% - 0s 0 0 5.00000 0 67 6.00000 5.00000 16.7% - 0s 0 0 5.00000 0 51 6.00000 5.00000 16.7% - 0s 0 0 5.00000 0 34 6.00000 5.00000 16.7% - 0s 0 0 5.00000 0 66 6.00000 5.00000 16.7% - 0s 0 0 5.00000 0 34 6.00000 5.00000 16.7% - 0s 0 0 5.00000 0 49 6.00000 5.00000 16.7% - 0s 0 0 5.00000 0 51 6.00000 5.00000 16.7% - 1s 0 0 5.00000 0 50 6.00000 5.00000 16.7% - 1s 0 0 5.00000 0 49 6.00000 5.00000 16.7% - 1s 0 0 5.00000 0 51 6.00000 5.00000 16.7% - 1s 0 0 5.00000 0 44 6.00000 5.00000 16.7% - 1s 0 0 5.00000 0 50 6.00000 5.00000 16.7% - 1s 0 0 5.00000 0 34 6.00000 5.00000 16.7% - 1s 0 2 5.00000 0 34 6.00000 5.00000 16.7% - 1s Explored 3 nodes (21740 simplex iterations) in 1.82 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 6.000000000000e+00, best bound 6.000000000000e+00, gap 0.0%