Gurobi 5.0.1 (linux64) logging started Mon Nov 19 06:43:41 2012 Optimize a model with 1097 rows, 66 columns and 2194 nonzeros Presolve removed 771 rows and 0 columns Presolve time: 0.03s Presolved: 326 rows, 66 columns, 2017 nonzeros Variable types: 0 continuous, 66 integer (66 binary) Found heuristic solution: objective 7.0000000 Root relaxation: objective 1.068315e+01, 152 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 10.68315 0 61 7.00000 10.68315 52.6% - 0s H 0 0 8.0000000 10.68315 33.5% - 0s 0 0 10.38374 0 64 8.00000 10.38374 29.8% - 0s 0 0 10.29039 0 64 8.00000 10.29039 28.6% - 0s 0 0 10.27290 0 64 8.00000 10.27290 28.4% - 0s 0 0 10.25730 0 62 8.00000 10.25730 28.2% - 0s 0 0 10.24091 0 63 8.00000 10.24091 28.0% - 0s 0 0 10.23017 0 64 8.00000 10.23017 27.9% - 0s 0 0 10.22011 0 65 8.00000 10.22011 27.8% - 0s 0 0 10.20926 0 65 8.00000 10.20926 27.6% - 0s 0 0 10.20778 0 65 8.00000 10.20778 27.6% - 0s 0 2 10.20681 0 65 8.00000 10.20681 27.6% - 0s Cutting planes: Clique: 18 Zero half: 11 Explored 19 nodes (1174 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%