Gurobi 5.0.1 (linux64) logging started Mon Nov 19 06:43:32 2012 Optimize a model with 943 rows, 62 columns and 1886 nonzeros Presolve removed 656 rows and 0 columns Presolve time: 0.02s Presolved: 287 rows, 62 columns, 1726 nonzeros Variable types: 0 continuous, 62 integer (62 binary) Found heuristic solution: objective 7.0000000 Root relaxation: objective 1.066603e+01, 126 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 10.66603 0 54 7.00000 10.66603 52.4% - 0s H 0 0 8.0000000 10.66603 33.3% - 0s 0 0 10.35887 0 57 8.00000 10.35887 29.5% - 0s 0 0 10.25884 0 56 8.00000 10.25884 28.2% - 0s 0 0 10.22321 0 55 8.00000 10.22321 27.8% - 0s 0 0 10.20259 0 57 8.00000 10.20259 27.5% - 0s 0 0 10.19423 0 56 8.00000 10.19423 27.4% - 0s 0 0 10.18279 0 57 8.00000 10.18279 27.3% - 0s 0 0 10.16241 0 58 8.00000 10.16241 27.0% - 0s 0 0 10.15856 0 58 8.00000 10.15856 27.0% - 0s 0 0 10.15827 0 58 8.00000 10.15827 27.0% - 0s 0 0 10.15825 0 58 8.00000 10.15825 27.0% - 0s 0 2 10.15285 0 58 8.00000 10.15285 26.9% - 0s Cutting planes: Clique: 36 Zero half: 5 Explored 16 nodes (907 simplex iterations) in 0.17 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%