Gurobi 5.0.1 (linux64) logging started Fri Nov 16 04:11:23 2012 Optimize a model with 7202 rows, 2450 columns and 23812 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.12s Presolved: 7200 rows, 2448 columns, 23518 nonzeros Variable types: 0 continuous, 2448 integer (2448 binary) Found heuristic solution: objective 49.0000000 Root relaxation: objective 2.000000e+00, 1854 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 41.0000000 2.00000 95.1% - 0s H 0 0 6.0000000 2.00000 66.7% - 0s 0 0 2.66667 0 139 6.00000 2.66667 55.6% - 0s H 0 0 5.0000000 2.66667 46.7% - 0s 0 0 2.67143 0 2199 5.00000 2.67143 46.6% - 0s H 0 0 4.0000000 2.67143 33.2% - 1s 0 0 2.67143 0 2193 4.00000 2.67143 33.2% - 1s 0 0 2.67143 0 2197 4.00000 2.67143 33.2% - 2s 0 0 2.67143 0 2057 4.00000 2.67143 33.2% - 2s 0 0 2.67143 0 2022 4.00000 2.67143 33.2% - 3s 0 0 2.67143 0 1919 4.00000 2.67143 33.2% - 4s 0 0 2.67143 0 1944 4.00000 2.67143 33.2% - 4s 0 0 2.67143 0 1974 4.00000 2.67143 33.2% - 5s 0 0 2.67143 0 1976 4.00000 2.67143 33.2% - 5s 0 0 2.67143 0 1973 4.00000 2.67143 33.2% - 6s 0 0 2.67143 0 1976 4.00000 2.67143 33.2% - 7s 0 0 2.67143 0 1968 4.00000 2.67143 33.2% - 7s 0 2 3.00000 0 1968 4.00000 3.00000 25.0% - 9s 10 0 cutoff 1 4.00000 4.00000 0.0% 418 10s Cutting planes: Clique: 48 Zero half: 1 Explored 11 nodes (28830 simplex iterations) in 10.30 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%