Gurobi 5.0.1 (linux64) logging started Fri Nov 16 01:07:46 2012 Optimize a model with 2596 rows, 506 columns and 8206 nonzeros Presolve removed 1228 rows and 0 columns Presolve time: 0.04s Presolved: 1368 rows, 506 columns, 7104 nonzeros Variable types: 0 continuous, 506 integer (506 binary) Found heuristic solution: objective 17.0000000 Root relaxation: objective 5.000000e+00, 1750 iterations, 0.12 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 5.00000 0 16 17.00000 5.00000 70.6% - 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 81 6.00000 5.00000 16.7% - 0s 0 0 5.00000 0 26 6.00000 5.00000 16.7% - 0s 0 0 5.00000 0 27 6.00000 5.00000 16.7% - 0s 0 0 5.00000 0 37 6.00000 5.00000 16.7% - 0s 0 0 5.00000 0 27 6.00000 5.00000 16.7% - 0s 0 0 5.00000 0 22 6.00000 5.00000 16.7% - 0s 0 0 5.00000 0 39 6.00000 5.00000 16.7% - 1s 0 0 5.00000 0 48 6.00000 5.00000 16.7% - 1s 0 0 5.00000 0 48 6.00000 5.00000 16.7% - 1s 0 2 5.00000 0 18 6.00000 5.00000 16.7% - 1s Cutting planes: Gomory: 5 Clique: 3 Zero half: 2 Explored 17 nodes (29430 simplex iterations) in 4.04 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%