Gurobi 5.0.1 (linux64) logging started Fri Nov 16 01:35:46 2012 Optimize a model with 5235 rows, 812 columns and 16378 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.07s Presolved: 5233 rows, 810 columns, 20748 nonzeros Variable types: 0 continuous, 810 integer (810 binary) Found heuristic solution: objective 28.0000000 Root relaxation: objective 3.704918e+00, 5504 iterations, 0.38 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3.70492 0 572 28.00000 3.70492 86.8% - 1s 0 0 6.00000 0 106 28.00000 6.00000 78.6% - 1s H 0 0 19.0000000 6.00000 68.4% - 1s H 0 0 15.0000000 6.00000 60.0% - 1s 0 0 6.00000 0 103 15.00000 6.00000 60.0% - 1s H 0 0 7.0000000 6.00000 14.3% - 1s 0 0 6.00000 0 16 7.00000 6.00000 14.3% - 1s 0 0 6.00000 0 20 7.00000 6.00000 14.3% - 1s 0 0 6.00000 0 98 7.00000 6.00000 14.3% - 1s 0 0 6.00000 0 47 7.00000 6.00000 14.3% - 1s 0 0 6.00000 0 49 7.00000 6.00000 14.3% - 1s 0 0 6.00000 0 53 7.00000 6.00000 14.3% - 1s 0 0 6.00000 0 60 7.00000 6.00000 14.3% - 1s 0 0 6.00000 0 60 7.00000 6.00000 14.3% - 2s 0 2 6.00000 0 60 7.00000 6.00000 14.3% - 2s Cutting planes: Clique: 4 Zero half: 3 Explored 9 nodes (14734 simplex iterations) in 2.12 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%