Gurobi 5.0.1 (linux64) logging started Fri Nov 16 04:13:37 2012 Optimize a model with 7202 rows, 2450 columns and 23812 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.12s Presolved: 7249 rows, 2448 columns, 25919 nonzeros Variable types: 0 continuous, 2448 integer (2448 binary) Found heuristic solution: objective 49.0000000 Root relaxation: objective 2.000000e+00, 1661 iterations, 0.05 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 98 49.00000 2.00000 95.9% - 0s H 0 0 6.0000000 2.00000 66.7% - 0s 0 0 2.66667 0 184 6.00000 2.66667 55.6% - 0s H 0 0 4.0000000 2.66667 33.3% - 0s 0 0 2.67626 0 2230 4.00000 2.67626 33.1% - 1s 0 0 2.67626 0 2214 4.00000 2.67626 33.1% - 2s 0 0 2.67626 0 2208 4.00000 2.67626 33.1% - 2s 0 0 2.67626 0 2209 4.00000 2.67626 33.1% - 3s 0 0 2.67626 0 2019 4.00000 2.67626 33.1% - 5s 0 0 2.67626 0 2003 4.00000 2.67626 33.1% - 8s 0 0 2.67626 0 2007 4.00000 2.67626 33.1% - 10s 0 0 2.67626 0 2091 4.00000 2.67626 33.1% - 13s 0 0 2.67626 0 2088 4.00000 2.67626 33.1% - 16s 0 0 2.67626 0 1940 4.00000 2.67626 33.1% - 19s 0 0 2.67626 0 1955 4.00000 2.67626 33.1% - 22s 0 0 2.67626 0 2079 4.00000 2.67626 33.1% - 24s 0 0 2.67626 0 2079 4.00000 2.67626 33.1% - 24s 0 1 3.00000 0 2079 4.00000 3.00000 25.0% - 28s Cutting planes: Clique: 80 Zero half: 17 Explored 10 nodes (104810 simplex iterations) in 29.24 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.000000000000e+00, best bound 4.000000000000e+00, gap 0.0%