Gurobi 5.0.1 (linux64) logging started Mon Nov 19 06:53:00 2012 Optimize a model with 3097 rows, 111 columns and 6194 nonzeros Presolve removed 2234 rows and 0 columns Presolve time: 0.09s Presolved: 863 rows, 111 columns, 5994 nonzeros Variable types: 0 continuous, 111 integer (111 binary) Found heuristic solution: objective 5.0000000 Root relaxation: objective 1.513081e+01, 438 iterations, 0.02 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 15.13081 0 104 5.00000 15.13081 203% - 0s H 0 0 8.0000000 15.13081 89.1% - 0s 0 0 14.79330 0 109 8.00000 14.79330 84.9% - 0s 0 0 14.69941 0 108 8.00000 14.69941 83.7% - 0s H 0 0 9.0000000 14.69941 63.3% - 0s 0 0 14.62967 0 110 9.00000 14.62967 62.6% - 0s 0 0 14.62498 0 111 9.00000 14.62498 62.5% - 0s 0 0 14.61569 0 111 9.00000 14.61569 62.4% - 0s 0 0 14.61390 0 111 9.00000 14.61390 62.4% - 0s 0 0 14.61360 0 111 9.00000 14.61360 62.4% - 1s 0 2 14.61102 0 111 9.00000 14.61102 62.3% - 1s Cutting planes: Clique: 86 Explored 332 nodes (19872 simplex iterations) in 2.49 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%