Gurobi 5.0.1 (linux64) logging started Mon Nov 19 06:45:13 2012 Optimize a model with 1828 rows, 85 columns and 3656 nonzeros Presolve removed 1262 rows and 0 columns Presolve time: 0.05s Presolved: 566 rows, 85 columns, 3690 nonzeros Variable types: 0 continuous, 85 integer (85 binary) Found heuristic solution: objective 6.0000000 Root relaxation: objective 1.275107e+01, 345 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 12.75107 0 78 6.00000 12.75107 113% - 0s H 0 0 7.0000000 12.75107 82.2% - 0s 0 0 12.41261 0 84 7.00000 12.41261 77.3% - 0s 0 0 12.34915 0 84 7.00000 12.34915 76.4% - 0s H 0 0 8.0000000 12.34915 54.4% - 0s 0 0 12.30277 0 85 8.00000 12.30277 53.8% - 0s 0 0 12.26549 0 85 8.00000 12.26549 53.3% - 0s 0 0 12.23966 0 84 8.00000 12.23966 53.0% - 0s 0 0 12.23293 0 85 8.00000 12.23293 52.9% - 0s 0 0 12.23070 0 85 8.00000 12.23070 52.9% - 0s 0 0 12.22625 0 85 8.00000 12.22625 52.8% - 0s 0 0 12.21634 0 85 8.00000 12.21634 52.7% - 0s 0 0 12.19007 0 84 8.00000 12.19007 52.4% - 0s 0 0 12.16945 0 85 8.00000 12.16945 52.1% - 0s 0 0 12.15225 0 85 8.00000 12.15225 51.9% - 0s 0 0 12.14644 0 85 8.00000 12.14644 51.8% - 0s 0 0 12.14547 0 85 8.00000 12.14547 51.8% - 0s 0 0 12.14404 0 84 8.00000 12.14404 51.8% - 0s 0 0 12.14394 0 84 8.00000 12.14394 51.8% - 0s 0 2 12.14148 0 84 8.00000 12.14148 51.8% - 1s Cutting planes: Clique: 65 Zero half: 1 Explored 135 nodes (6851 simplex iterations) in 1.29 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 8.000000000000e+00, best bound 8.000000000000e+00, gap 0.0%