Gurobi 5.0.1 (linux64) logging started Mon Nov 19 06:53:21 2012 Optimize a model with 3081 rows, 112 columns and 6162 nonzeros Presolve removed 2209 rows and 0 columns Presolve time: 0.09s Presolved: 872 rows, 112 columns, 5946 nonzeros Variable types: 0 continuous, 112 integer (112 binary) Found heuristic solution: objective 8.0000000 Root relaxation: objective 1.542257e+01, 458 iterations, 0.02 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 15.42257 0 108 8.00000 15.42257 92.8% - 0s H 0 0 9.0000000 15.42257 71.4% - 0s 0 0 14.99388 0 112 9.00000 14.99388 66.6% - 0s 0 0 14.91055 0 112 9.00000 14.91055 65.7% - 0s 0 0 14.89096 0 112 9.00000 14.89096 65.5% - 0s 0 0 14.88113 0 111 9.00000 14.88113 65.3% - 0s 0 0 14.86372 0 110 9.00000 14.86372 65.2% - 0s H 0 0 10.0000000 14.86372 48.6% - 0s 0 0 14.86225 0 111 10.00000 14.86225 48.6% - 0s 0 0 14.86207 0 111 10.00000 14.86207 48.6% - 1s 0 2 14.85935 0 111 10.00000 14.85935 48.6% - 1s Cutting planes: Clique: 96 Explored 172 nodes (13720 simplex iterations) in 2.24 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.000000000000e+01, best bound 1.000000000000e+01, gap 0.0%