Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:08 2012 Optimize a model with 226 rows, 97 columns and 452 nonzeros Presolve removed 96 rows and 29 columns Presolve time: 0.00s Presolved: 130 rows, 68 columns, 266 nonzeros Variable types: 0 continuous, 68 integer (68 binary) Found heuristic solution: objective 41.0000000 Root relaxation: objective 4.600000e+01, 95 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 46.00000 0 63 41.00000 46.00000 12.2% - 0s H 0 0 45.0000000 46.00000 2.22% - 0s Cutting planes: Zero half: 2 Explored 0 nodes (113 simplex iterations) in 0.01 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.500000000000e+01, best bound 4.600000000000e+01, gap 2.2222%