Gurobi 5.0.1 (linux64) logging started Mon Nov 19 06:52:10 2012 Optimize a model with 2984 rows, 110 columns and 5968 nonzeros Presolve removed 2096 rows and 0 columns Presolve time: 0.11s Presolved: 888 rows, 110 columns, 6041 nonzeros Variable types: 0 continuous, 110 integer (110 binary) Found heuristic solution: objective 6.0000000 Root relaxation: objective 1.501573e+01, 582 iterations, 0.02 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 15.01573 0 106 6.00000 15.01573 150% - 0s H 0 0 8.0000000 15.01573 87.7% - 0s 0 0 14.78710 0 107 8.00000 14.78710 84.8% - 0s 0 0 14.69063 0 108 8.00000 14.69063 83.6% - 0s 0 0 14.64463 0 110 8.00000 14.64463 83.1% - 0s H 0 0 9.0000000 14.64463 62.7% - 0s 0 0 14.63429 0 109 9.00000 14.63429 62.6% - 0s 0 0 14.62486 0 109 9.00000 14.62486 62.5% - 0s 0 0 14.62458 0 110 9.00000 14.62458 62.5% - 0s 0 2 14.62262 0 110 9.00000 14.62262 62.5% - 1s Cutting planes: Clique: 53 Zero half: 4 Explored 285 nodes (19330 simplex iterations) in 2.29 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 9.000000000000e+00, best bound 9.000000000000e+00, gap 0.0%