Gurobi 5.0.1 (linux64) logging started Fri Nov 16 01:36:22 2012 Optimize a model with 5543 rows, 812 columns and 17302 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.08s Presolved: 5569 rows, 810 columns, 22878 nonzeros Variable types: 0 continuous, 810 integer (810 binary) Found heuristic solution: objective 28.0000000 Root relaxation: objective 3.677419e+00, 6623 iterations, 0.45 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3.67742 0 568 28.00000 3.67742 86.9% - 1s H 0 0 23.0000000 3.67742 84.0% - 1s 0 0 6.00000 0 103 23.00000 6.00000 73.9% - 1s H 0 0 22.0000000 6.00000 72.7% - 1s H 0 0 7.0000000 6.00000 14.3% - 2s 0 0 6.00000 0 78 7.00000 6.00000 14.3% - 2s 0 0 6.00000 0 34 7.00000 6.00000 14.3% - 2s 0 0 6.00000 0 76 7.00000 6.00000 14.3% - 2s 0 0 6.00000 0 42 7.00000 6.00000 14.3% - 2s 0 0 6.00000 0 54 7.00000 6.00000 14.3% - 2s 0 0 6.00000 0 52 7.00000 6.00000 14.3% - 2s 0 0 6.00000 0 38 7.00000 6.00000 14.3% - 2s 0 0 6.00000 0 63 7.00000 6.00000 14.3% - 2s 0 0 6.00000 0 54 7.00000 6.00000 14.3% - 2s 0 0 6.00000 0 30 7.00000 6.00000 14.3% - 2s 0 0 6.00000 0 48 7.00000 6.00000 14.3% - 2s 0 0 6.00000 0 48 7.00000 6.00000 14.3% - 2s 0 2 6.00000 0 48 7.00000 6.00000 14.3% - 2s Cutting planes: Clique: 3 Zero half: 12 Explored 22 nodes (23475 simplex iterations) in 3.09 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 7.000000000000e+00, best bound 7.000000000000e+00, gap 0.0%