Gurobi 5.0.1 (linux64) logging started Mon Nov 19 06:44:01 2012 Optimize a model with 1270 rows, 72 columns and 2540 nonzeros Presolve removed 883 rows and 0 columns Presolve time: 0.03s Presolved: 387 rows, 72 columns, 2387 nonzeros Variable types: 0 continuous, 72 integer (72 binary) Found heuristic solution: objective 6.0000000 Root relaxation: objective 1.138327e+01, 273 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 11.38327 0 67 6.00000 11.38327 89.7% - 0s H 0 0 7.0000000 11.38327 62.6% - 0s 0 0 11.12552 0 69 7.00000 11.12552 58.9% - 0s H 0 0 8.0000000 11.12552 39.1% - 0s 0 0 11.05053 0 69 8.00000 11.05053 38.1% - 0s 0 0 11.01518 0 67 8.00000 11.01518 37.7% - 0s 0 0 11.00724 0 72 8.00000 11.00724 37.6% - 0s 0 0 10.99763 0 71 8.00000 10.99763 37.5% - 0s 0 0 10.99021 0 70 8.00000 10.99021 37.4% - 0s 0 0 10.98932 0 72 8.00000 10.98932 37.4% - 0s 0 2 10.98877 0 72 8.00000 10.98877 37.4% - 0s Cutting planes: Clique: 24 Zero half: 14 Explored 39 nodes (2373 simplex iterations) in 0.28 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%