Gurobi 5.0.1 (linux64) logging started Mon Nov 19 06:52:55 2012 Optimize a model with 3107 rows, 111 columns and 6214 nonzeros Presolve removed 2245 rows and 0 columns Presolve time: 0.10s Presolved: 862 rows, 111 columns, 5966 nonzeros Variable types: 0 continuous, 111 integer (111 binary) Found heuristic solution: objective 7.0000000 Root relaxation: objective 1.529536e+01, 432 iterations, 0.02 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 15.29536 0 105 7.00000 15.29536 119% - 0s H 0 0 8.0000000 15.29536 91.2% - 0s 0 0 14.84007 0 110 8.00000 14.84007 85.5% - 0s 0 0 14.75774 0 109 8.00000 14.75774 84.5% - 0s 0 0 14.69742 0 110 8.00000 14.69742 83.7% - 0s 0 0 14.68561 0 109 8.00000 14.68561 83.6% - 0s H 0 0 9.0000000 14.68561 63.2% - 0s 0 0 14.67304 0 109 9.00000 14.67304 63.0% - 0s 0 0 14.65958 0 109 9.00000 14.65958 62.9% - 0s 0 0 14.63297 0 110 9.00000 14.63297 62.6% - 1s 0 0 14.62145 0 111 9.00000 14.62145 62.5% - 1s 0 0 14.61348 0 111 9.00000 14.61348 62.4% - 1s 0 0 14.61201 0 110 9.00000 14.61201 62.4% - 1s 0 0 14.61187 0 110 9.00000 14.61187 62.4% - 1s 0 2 14.61119 0 110 9.00000 14.61119 62.3% - 1s * 115 48 8 10.0000000 13.76484 37.6% 64.7 2s Cutting planes: Clique: 64 Zero half: 3 Explored 172 nodes (12390 simplex iterations) in 2.55 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%