Gurobi 5.0.1 (linux64) logging started Mon Nov 19 06:43:52 2012 Optimize a model with 1223 rows, 70 columns and 2446 nonzeros Presolve removed 862 rows and 0 columns Presolve time: 0.02s Presolved: 361 rows, 70 columns, 2230 nonzeros Variable types: 0 continuous, 70 integer (70 binary) Found heuristic solution: objective 7.0000000 Root relaxation: objective 1.082265e+01, 212 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 10.82265 0 63 7.00000 10.82265 54.6% - 0s H 0 0 8.0000000 10.82265 35.3% - 0s 0 0 10.55060 0 69 8.00000 10.55060 31.9% - 0s 0 0 10.50744 0 69 8.00000 10.50744 31.3% - 0s 0 0 10.47684 0 69 8.00000 10.47684 31.0% - 0s 0 0 10.45080 0 68 8.00000 10.45080 30.6% - 0s 0 0 10.45033 0 69 8.00000 10.45033 30.6% - 0s 0 0 10.45027 0 69 8.00000 10.45027 30.6% - 0s 0 2 10.44881 0 69 8.00000 10.44881 30.6% - 0s Cutting planes: Clique: 36 Zero half: 5 Explored 25 nodes (1614 simplex iterations) in 0.23 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%