Gurobi 5.0.1 (linux64) logging started Mon Nov 19 06:43:15 2012 Optimize a model with 469 rows, 45 columns and 938 nonzeros Presolve removed 319 rows and 0 columns Presolve time: 0.01s Presolved: 150 rows, 45 columns, 770 nonzeros Variable types: 0 continuous, 45 integer (45 binary) Found heuristic solution: objective 6.0000000 Root relaxation: objective 8.737615e+00, 84 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 8.73761 0 40 6.00000 8.73761 45.6% - 0s H 0 0 7.0000000 8.73761 24.8% - 0s 0 0 8.43175 0 42 7.00000 8.43175 20.5% - 0s 0 0 8.40477 0 40 7.00000 8.40477 20.1% - 0s 0 0 8.39103 0 43 7.00000 8.39103 19.9% - 0s 0 0 8.36306 0 41 7.00000 8.36306 19.5% - 0s 0 0 8.33186 0 42 7.00000 8.33186 19.0% - 0s 0 0 8.31305 0 43 7.00000 8.31305 18.8% - 0s 0 0 8.30028 0 42 7.00000 8.30028 18.6% - 0s 0 0 8.27964 0 42 7.00000 8.27964 18.3% - 0s 0 0 8.26863 0 42 7.00000 8.26863 18.1% - 0s 0 0 8.26468 0 42 7.00000 8.26468 18.1% - 0s 0 2 8.26359 0 42 7.00000 8.26359 18.1% - 0s Cutting planes: Clique: 14 Zero half: 10 Explored 5 nodes (349 simplex iterations) in 0.06 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%