Gurobi 5.0.1 (linux64) logging started Fri Nov 16 03:09:51 2012 Optimize a model with 2209 rows, 1190 columns and 7648 nonzeros Presolve removed 444 rows and 2 columns Presolve time: 0.09s Presolved: 1799 rows, 1188 columns, 7714 nonzeros Variable types: 0 continuous, 1188 integer (1188 binary) Found heuristic solution: objective 34.0000000 Root relaxation: objective 3.000000e+00, 1524 iterations, 0.06 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3.00000 0 50 34.00000 3.00000 91.2% - 0s H 0 0 21.0000000 3.00000 85.7% - 0s H 0 0 4.0000000 3.00000 25.0% - 0s 0 0 3.00000 0 116 4.00000 3.00000 25.0% - 0s 0 0 3.00000 0 53 4.00000 3.00000 25.0% - 0s 0 0 3.00000 0 47 4.00000 3.00000 25.0% - 0s 0 0 3.00000 0 32 4.00000 3.00000 25.0% - 1s 0 0 3.00000 0 37 4.00000 3.00000 25.0% - 1s 0 0 3.00000 0 51 4.00000 3.00000 25.0% - 1s 0 0 3.00000 0 42 4.00000 3.00000 25.0% - 1s 0 0 3.00000 0 66 4.00000 3.00000 25.0% - 2s 0 0 3.00000 0 66 4.00000 3.00000 25.0% - 2s 0 2 3.00000 0 66 4.00000 3.00000 25.0% - 2s Cutting planes: Gomory: 18 Zero half: 120 Explored 8 nodes (46628 simplex iterations) in 4.50 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%