Gurobi 5.0.1 (linux64) logging started Mon Nov 19 06:43:21 2012 Optimize a model with 733 rows, 54 columns and 1466 nonzeros Presolve removed 517 rows and 0 columns Presolve time: 0.01s Presolved: 216 rows, 54 columns, 1252 nonzeros Variable types: 0 continuous, 54 integer (54 binary) Found heuristic solution: objective 5.0000000 Root relaxation: objective 9.181696e+00, 118 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 9.18170 0 49 5.00000 9.18170 83.6% - 0s H 0 0 6.0000000 9.18170 53.0% - 0s 0 0 8.91758 0 51 6.00000 8.91758 48.6% - 0s 0 0 8.86728 0 50 6.00000 8.86728 47.8% - 0s 0 0 8.85265 0 51 6.00000 8.85265 47.5% - 0s H 0 0 7.0000000 8.85265 26.5% - 0s 0 0 8.81128 0 50 7.00000 8.81128 25.9% - 0s 0 0 8.78425 0 49 7.00000 8.78425 25.5% - 0s 0 0 8.75188 0 48 7.00000 8.75188 25.0% - 0s 0 0 8.74448 0 48 7.00000 8.74448 24.9% - 0s 0 0 8.72115 0 50 7.00000 8.72115 24.6% - 0s 0 0 8.70629 0 51 7.00000 8.70629 24.4% - 0s 0 0 8.70046 0 52 7.00000 8.70046 24.3% - 0s 0 0 8.68765 0 49 7.00000 8.68765 24.1% - 0s 0 0 8.68240 0 49 7.00000 8.68240 24.0% - 0s 0 0 8.68234 0 49 7.00000 8.68234 24.0% - 0s 0 2 8.67698 0 49 7.00000 8.67698 24.0% - 0s Cutting planes: Clique: 23 Zero half: 6 Explored 13 nodes (777 simplex iterations) in 0.12 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%