Gurobi 5.0.1 (linux64) logging started Mon Nov 19 07:00:33 2012 Optimize a model with 3825 rows, 123 columns and 7650 nonzeros Presolve removed 2694 rows and 0 columns Presolve time: 0.15s Presolved: 1131 rows, 123 columns, 8307 nonzeros Variable types: 0 continuous, 123 integer (123 binary) Found heuristic solution: objective 9.0000000 Root relaxation: objective 1.597318e+01, 496 iterations, 0.03 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 15.97318 0 122 9.00000 15.97318 77.5% - 0s 0 0 15.79731 0 123 9.00000 15.79731 75.5% - 0s H 0 0 10.0000000 15.79731 58.0% - 0s 0 0 15.75984 0 123 10.00000 15.75984 57.6% - 0s 0 0 15.71235 0 123 10.00000 15.71235 57.1% - 0s 0 0 15.70651 0 123 10.00000 15.70651 57.1% - 0s 0 0 15.70541 0 123 10.00000 15.70541 57.1% - 1s 0 0 15.69152 0 123 10.00000 15.69152 56.9% - 1s 0 0 15.65769 0 123 10.00000 15.65769 56.6% - 1s 0 0 15.64294 0 123 10.00000 15.64294 56.4% - 1s 0 0 15.63815 0 122 10.00000 15.63815 56.4% - 1s 0 0 15.63797 0 122 10.00000 15.63797 56.4% - 1s 0 0 15.63792 0 122 10.00000 15.63792 56.4% - 1s 0 0 15.63298 0 123 10.00000 15.63298 56.3% - 2s 0 0 15.63099 0 123 10.00000 15.63099 56.3% - 2s 0 0 15.63089 0 123 10.00000 15.63089 56.3% - 2s 0 0 15.63066 0 123 10.00000 15.63066 56.3% - 2s 0 2 15.62994 0 123 10.00000 15.62994 56.3% - 3s Cutting planes: Clique: 53 Zero half: 5 Explored 224 nodes (21124 simplex iterations) in 4.70 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%