Gurobi 5.0.1 (linux64) logging started Fri Nov 16 03:34:09 2012 Optimize a model with 4179 rows, 1980 columns and 14298 nonzeros Presolve removed 882 rows and 2 columns Presolve time: 0.12s Presolved: 3341 rows, 1978 columns, 14104 nonzeros Variable types: 0 continuous, 1978 integer (1978 binary) Found heuristic solution: objective 44.0000000 Root relaxation: objective 3.000000e+00, 2717 iterations, 0.21 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3.00000 0 64 44.00000 3.00000 93.2% - 1s H 0 0 27.0000000 3.00000 88.9% - 1s H 0 0 18.0000000 3.00000 83.3% - 1s H 0 0 5.0000000 3.00000 40.0% - 1s 0 0 3.00000 0 52 5.00000 3.00000 40.0% - 1s H 0 0 4.0000000 3.00000 25.0% - 1s 0 0 3.00000 0 195 4.00000 3.00000 25.0% - 1s 0 0 3.00000 0 83 4.00000 3.00000 25.0% - 2s 0 0 3.00000 0 40 4.00000 3.00000 25.0% - 3s 0 0 3.00000 0 42 4.00000 3.00000 25.0% - 3s 0 0 3.00000 0 53 4.00000 3.00000 25.0% - 4s 0 0 3.00000 0 61 4.00000 3.00000 25.0% - 5s 0 0 3.00000 0 42 4.00000 3.00000 25.0% - 5s 0 0 3.00000 0 55 4.00000 3.00000 25.0% - 6s 0 0 3.00000 0 55 4.00000 3.00000 25.0% - 6s 0 2 3.00000 0 54 4.00000 3.00000 25.0% - 7s 5 5 3.00000 1 44 4.00000 3.00000 25.0% 332 10s 10 10 3.00000 14 80 4.00000 3.00000 25.0% 3543 16s Cutting planes: Gomory: 6 Zero half: 3 Explored 20 nodes (90900 simplex iterations) in 19.97 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%