Gurobi 5.0.1 (linux64) logging started Fri Nov 16 05:41:12 2012 Optimize a model with 9844 rows, 3080 columns and 32338 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.21s Presolved: 9897 rows, 3078 columns, 35005 nonzeros Variable types: 0 continuous, 3078 integer (3078 binary) Found heuristic solution: objective 55.0000000 Root relaxation: objective 2.000000e+00, 2316 iterations, 0.07 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 110 55.00000 2.00000 96.4% - 0s H 0 0 50.0000000 2.00000 96.0% - 0s H 0 0 5.0000000 2.00000 60.0% - 0s 0 0 2.66667 0 157 5.00000 2.66667 46.7% - 1s 0 0 2.67089 0 2727 5.00000 2.67089 46.6% - 1s 0 0 2.67089 0 2736 5.00000 2.67089 46.6% - 2s 0 0 2.67089 0 2385 5.00000 2.67089 46.6% - 4s 0 0 2.67089 0 2354 5.00000 2.67089 46.6% - 6s 0 0 2.67089 0 2346 5.00000 2.67089 46.6% - 8s 0 0 2.67089 0 2293 5.00000 2.67089 46.6% - 10s 0 0 2.67089 0 2326 5.00000 2.67089 46.6% - 11s 0 0 2.67089 0 2351 5.00000 2.67089 46.6% - 13s 0 0 2.67089 0 2427 5.00000 2.67089 46.6% - 15s 0 0 2.67089 0 2302 5.00000 2.67089 46.6% - 17s 0 0 2.67089 0 2374 5.00000 2.67089 46.6% - 19s 0 0 2.67089 0 2374 5.00000 2.67089 46.6% - 19s 0 2 2.80000 0 2372 5.00000 2.80000 44.0% - 24s 9 3 4.00000 2 123 5.00000 3.00000 40.0% 743 25s H 28 4 4.0000000 3.00000 25.0% 308 25s Cutting planes: Clique: 48 Zero half: 3 Explored 33 nodes (86426 simplex iterations) in 25.88 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%