Gurobi 5.0.1 (linux64) logging started Fri Nov 16 04:28:34 2012 Optimize a model with 7292 rows, 2652 columns and 24274 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.13s Presolved: 7341 rows, 2650 columns, 26589 nonzeros Variable types: 0 continuous, 2650 integer (2650 binary) Found heuristic solution: objective 51.0000000 Root relaxation: objective 2.000000e+00, 2130 iterations, 0.06 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 102 51.00000 2.00000 96.1% - 0s H 0 0 45.0000000 2.00000 95.6% - 0s H 0 0 5.0000000 2.00000 60.0% - 0s 0 0 2.66667 0 124 5.00000 2.66667 46.7% - 0s H 0 0 4.0000000 2.66667 33.3% - 0s 0 0 2.67123 0 2198 4.00000 2.67123 33.2% - 1s 0 0 2.67123 0 2185 4.00000 2.67123 33.2% - 1s 0 0 2.67123 0 2186 4.00000 2.67123 33.2% - 2s 0 0 2.67123 0 2038 4.00000 2.67123 33.2% - 3s 0 0 2.67123 0 2039 4.00000 2.67123 33.2% - 4s 0 0 2.67123 0 1989 4.00000 2.67123 33.2% - 4s 0 0 2.67123 0 1858 4.00000 2.67123 33.2% - 5s 0 0 2.67123 0 1855 4.00000 2.67123 33.2% - 5s 0 0 2.67123 0 1898 4.00000 2.67123 33.2% - 6s 0 0 2.67123 0 1887 4.00000 2.67123 33.2% - 7s 0 0 2.67123 0 1939 4.00000 2.67123 33.2% - 7s 0 0 2.67123 0 1948 4.00000 2.67123 33.2% - 8s 0 0 2.67123 0 1900 4.00000 2.67123 33.2% - 8s 0 2 3.00000 0 1900 4.00000 3.00000 25.0% - 9s 2 4 3.00000 2 100 4.00000 3.00000 25.0% 749 10s Cutting planes: Clique: 56 Zero half: 13 Explored 17 nodes (36711 simplex iterations) in 10.12 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%