Gurobi 5.0.1 (linux64) logging started Fri Nov 16 01:10:15 2012 Optimize a model with 3287 rows, 600 columns and 10342 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.07s Presolved: 3309 rows, 598 columns, 17869 nonzeros Variable types: 0 continuous, 598 integer (598 binary) Found heuristic solution: objective 24.0000000 Root relaxation: objective 5.520000e+00, 2877 iterations, 0.17 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 5.52000 0 196 24.00000 5.52000 77.0% - 0s H 0 0 10.0000000 5.52000 44.8% - 0s 0 0 6.00000 0 32 10.00000 6.00000 40.0% - 0s 0 0 6.00000 0 30 10.00000 6.00000 40.0% - 1s H 0 0 8.0000000 6.00000 25.0% - 1s H 0 0 7.0000000 6.00000 14.3% - 1s 0 0 6.00000 0 26 7.00000 6.00000 14.3% - 1s H 0 0 6.0000000 6.00000 0.0% - 1s Explored 0 nodes (9748 simplex iterations) in 1.14 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%