Gurobi 5.0.1 (linux64) logging started Fri Nov 16 01:35:40 2012 Optimize a model with 5347 rows, 812 columns and 16714 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.07s Presolved: 5345 rows, 810 columns, 21032 nonzeros Variable types: 0 continuous, 810 integer (810 binary) Found heuristic solution: objective 28.0000000 Root relaxation: objective 3.677419e+00, 4779 iterations, 0.26 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3.67742 0 609 28.00000 3.67742 86.9% - 1s 0 0 6.00000 0 102 28.00000 6.00000 78.6% - 1s H 0 0 24.0000000 6.00000 75.0% - 1s 0 0 6.00000 0 106 24.00000 6.00000 75.0% - 1s H 0 0 12.0000000 6.00000 50.0% - 1s H 0 0 10.0000000 6.00000 40.0% - 1s H 0 0 7.0000000 6.00000 14.3% - 1s 0 0 6.00000 0 20 7.00000 6.00000 14.3% - 1s 0 0 6.00000 0 39 7.00000 6.00000 14.3% - 1s 0 0 6.00000 0 80 7.00000 6.00000 14.3% - 1s 0 0 6.00000 0 94 7.00000 6.00000 14.3% - 1s 0 0 6.00000 0 58 7.00000 6.00000 14.3% - 1s 0 0 6.00000 0 61 7.00000 6.00000 14.3% - 1s 0 0 6.00000 0 72 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: 7 Zero half: 5 Explored 9 nodes (15779 simplex iterations) in 2.23 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%