Gurobi 5.0.1 (linux64) logging started Mon Nov 19 06:43:34 2012 Optimize a model with 965 rows, 63 columns and 1930 nonzeros Presolve removed 654 rows and 0 columns Presolve time: 0.02s Presolved: 311 rows, 63 columns, 1805 nonzeros Variable types: 0 continuous, 63 integer (63 binary) Found heuristic solution: objective 7.0000000 Root relaxation: objective 1.103487e+01, 145 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 11.03487 0 55 7.00000 11.03487 57.6% - 0s H 0 0 8.0000000 11.03487 37.9% - 0s 0 0 10.63501 0 61 8.00000 10.63501 32.9% - 0s 0 0 10.54860 0 61 8.00000 10.54860 31.9% - 0s 0 0 10.53211 0 62 8.00000 10.53211 31.7% - 0s 0 0 10.51733 0 62 8.00000 10.51733 31.5% - 0s 0 0 10.51664 0 62 8.00000 10.51664 31.5% - 0s 0 0 10.51635 0 63 8.00000 10.51635 31.5% - 0s 0 2 10.51341 0 63 8.00000 10.51341 31.4% - 0s Cutting planes: Clique: 36 Zero half: 4 Explored 22 nodes (1161 simplex iterations) in 0.18 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%