Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:18 2012 Optimize a model with 335 rows, 115 columns and 670 nonzeros Presolve removed 65 rows and 2 columns Presolve time: 0.00s Presolved: 270 rows, 113 columns, 569 nonzeros Variable types: 0 continuous, 113 integer (113 binary) Found heuristic solution: objective 44.0000000 Root relaxation: objective 5.000000e+01, 171 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 50.00000 0 101 44.00000 50.00000 13.6% - 0s H 0 0 46.0000000 50.00000 8.70% - 0s 0 0 48.87097 0 107 46.00000 48.87097 6.24% - 0s 0 0 48.71296 0 112 46.00000 48.71296 5.90% - 0s H 0 0 47.0000000 48.71296 3.64% - 0s 0 0 48.57143 0 104 47.00000 48.57143 3.34% - 0s 0 0 48.56338 0 104 47.00000 48.56338 3.33% - 0s 0 0 48.56338 0 98 47.00000 48.56338 3.33% - 0s 0 2 48.56338 0 98 47.00000 48.56338 3.33% - 0s Cutting planes: Gomory: 1 Zero half: 18 Explored 22 nodes (649 simplex iterations) in 0.04 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.700000000000e+01, best bound 4.700000000000e+01, gap 0.0%