Gurobi 5.0.1 (linux64) logging started Fri Nov 16 01:06:29 2012 Optimize a model with 1325 rows, 306 columns and 4197 nonzeros Presolve removed 801 rows and 2 columns Presolve time: 0.02s Presolved: 524 rows, 304 columns, 2809 nonzeros Variable types: 0 continuous, 304 integer (304 binary) Found heuristic solution: objective 17.0000000 Root relaxation: objective 5.000000e+00, 666 iterations, 0.02 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 5.00000 0 60 17.00000 5.00000 70.6% - 0s H 0 0 13.0000000 5.00000 61.5% - 0s H 0 0 8.0000000 5.00000 37.5% - 0s 0 0 5.00000 0 42 8.00000 5.00000 37.5% - 0s H 0 0 7.0000000 5.00000 28.6% - 0s H 0 0 6.0000000 5.00000 16.7% - 0s 0 0 5.00000 0 36 6.00000 5.00000 16.7% - 0s 0 0 5.00000 0 57 6.00000 5.00000 16.7% - 0s 0 0 5.00000 0 14 6.00000 5.00000 16.7% - 0s 0 0 5.00000 0 41 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 38 6.00000 5.00000 16.7% - 0s 0 2 5.00000 0 38 6.00000 5.00000 16.7% - 0s Explored 3 nodes (4851 simplex iterations) in 0.38 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%