Gurobi 5.0.1 (linux64) logging started Mon Nov 19 06:43:48 2012 Optimize a model with 1161 rows, 69 columns and 2322 nonzeros Presolve removed 798 rows and 0 columns Presolve time: 0.03s Presolved: 363 rows, 69 columns, 2171 nonzeros Variable types: 0 continuous, 69 integer (69 binary) Found heuristic solution: objective 7.0000000 Root relaxation: objective 1.145788e+01, 285 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 11.45788 0 62 7.00000 11.45788 63.7% - 0s H 0 0 8.0000000 11.45788 43.2% - 0s 0 0 11.06110 0 67 8.00000 11.06110 38.3% - 0s 0 0 11.01838 0 67 8.00000 11.01838 37.7% - 0s 0 0 10.97173 0 68 8.00000 10.97173 37.1% - 0s 0 0 10.94053 0 66 8.00000 10.94053 36.8% - 0s 0 0 10.92951 0 68 8.00000 10.92951 36.6% - 0s 0 0 10.92676 0 68 8.00000 10.92676 36.6% - 0s 0 0 10.89810 0 64 8.00000 10.89810 36.2% - 0s 0 0 10.87726 0 65 8.00000 10.87726 36.0% - 0s 0 0 10.86705 0 66 8.00000 10.86705 35.8% - 0s 0 0 10.85767 0 67 8.00000 10.85767 35.7% - 0s 0 0 10.85005 0 68 8.00000 10.85005 35.6% - 0s 0 0 10.84606 0 68 8.00000 10.84606 35.6% - 0s 0 0 10.84563 0 68 8.00000 10.84563 35.6% - 0s 0 0 10.84554 0 68 8.00000 10.84554 35.6% - 0s 0 2 10.84323 0 68 8.00000 10.84323 35.5% - 0s Cutting planes: Clique: 46 Zero half: 2 Explored 49 nodes (2377 simplex iterations) in 0.40 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%