Gurobi 5.0.1 (linux64) logging started Fri Nov 16 03:40:59 2012 Optimize a model with 4364 rows, 2070 columns and 14938 nonzeros Presolve removed 857 rows and 2 columns Presolve time: 0.10s Presolved: 3552 rows, 2068 columns, 14782 nonzeros Variable types: 0 continuous, 2068 integer (2068 binary) Found heuristic solution: objective 45.0000000 Root relaxation: objective 3.000000e+00, 2844 iterations, 0.22 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3.00000 0 42 45.00000 3.00000 93.3% - 0s H 0 0 22.0000000 3.00000 86.4% - 0s H 0 0 4.0000000 3.00000 25.0% - 0s 0 0 3.00000 0 67 4.00000 3.00000 25.0% - 1s 0 0 3.00000 0 62 4.00000 3.00000 25.0% - 1s 0 0 3.00000 0 55 4.00000 3.00000 25.0% - 2s 0 0 3.00000 0 58 4.00000 3.00000 25.0% - 2s 0 0 3.00000 0 50 4.00000 3.00000 25.0% - 3s 0 0 3.00000 0 93 4.00000 3.00000 25.0% - 4s 0 0 3.00000 0 676 4.00000 3.00000 25.0% - 5s 0 0 3.00000 0 108 4.00000 3.00000 25.0% - 6s H 0 0 3.0000000 3.00000 0.0% - 6s Cutting planes: Zero half: 5 Explored 0 nodes (50155 simplex iterations) in 6.77 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.000000000000e+00, best bound 3.000000000000e+00, gap 0.0%