Gurobi 5.0.1 (linux64) logging started Fri Nov 16 01:12:09 2012 Optimize a model with 3674 rows, 650 columns and 11548 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.07s Presolved: 3697 rows, 648 columns, 18858 nonzeros Variable types: 0 continuous, 648 integer (648 binary) Root relaxation: objective 4.787879e+00, 2928 iterations, 0.18 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 4.78788 0 256 - 4.78788 - - 0s H 0 0 25.0000000 4.78788 80.8% - 0s 0 0 6.00000 0 34 25.00000 6.00000 76.0% - 0s H 0 0 23.0000000 6.00000 73.9% - 0s H 0 0 18.0000000 6.00000 66.7% - 0s H 0 0 7.0000000 6.00000 14.3% - 0s 0 0 6.00000 0 24 7.00000 6.00000 14.3% - 0s * 0 0 0 6.0000000 6.00000 0.0% - 1s Explored 0 nodes (7509 simplex iterations) in 1.06 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%