Gurobi 5.0.1 (linux64) logging started Mon Nov 19 06:43:33 2012 Optimize a model with 978 rows, 62 columns and 1956 nonzeros Presolve removed 693 rows and 0 columns Presolve time: 0.02s Presolved: 285 rows, 62 columns, 1756 nonzeros Variable types: 0 continuous, 62 integer (62 binary) Found heuristic solution: objective 6.0000000 Root relaxation: objective 1.012399e+01, 147 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 10.12399 0 53 6.00000 10.12399 68.7% - 0s H 0 0 7.0000000 10.12399 44.6% - 0s 0 0 9.82276 0 59 7.00000 9.82276 40.3% - 0s H 0 0 8.0000000 9.82276 22.8% - 0s 0 0 9.74441 0 57 8.00000 9.74441 21.8% - 0s 0 0 9.69718 0 56 8.00000 9.69718 21.2% - 0s 0 0 9.69541 0 57 8.00000 9.69541 21.2% - 0s 0 0 9.69361 0 56 8.00000 9.69361 21.2% - 0s 0 0 9.69347 0 57 8.00000 9.69347 21.2% - 0s 0 2 9.68600 0 57 8.00000 9.68600 21.1% - 0s Cutting planes: Clique: 23 Zero half: 4 Explored 9 nodes (572 simplex iterations) in 0.13 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%