Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:11 2012 Optimize a model with 257 rows, 103 columns and 514 nonzeros Presolve removed 40 rows and 4 columns Presolve time: 0.00s Presolved: 217 rows, 99 columns, 453 nonzeros Variable types: 0 continuous, 99 integer (99 binary) Found heuristic solution: objective 38.0000000 Root relaxation: objective 4.600000e+01, 125 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 82 38.00000 46.00000 21.1% - 0s 0 0 44.50000 0 96 38.00000 44.50000 17.1% - 0s H 0 0 40.0000000 44.50000 11.2% - 0s H 0 0 41.0000000 44.50000 8.54% - 0s 0 0 44.00000 0 72 41.00000 44.00000 7.32% - 0s 0 0 44.00000 0 82 41.00000 44.00000 7.32% - 0s 0 0 43.89474 0 94 41.00000 43.89474 7.06% - 0s 0 0 43.50000 0 71 41.00000 43.50000 6.10% - 0s 0 0 43.44000 0 98 41.00000 43.44000 5.95% - 0s 0 0 43.40000 0 97 41.00000 43.40000 5.85% - 0s H 0 0 42.0000000 43.40000 3.33% - 0s 0 0 43.37615 0 98 42.00000 43.37615 3.28% - 0s 0 0 43.37615 0 98 42.00000 43.37615 3.28% - 0s 0 2 43.37615 0 98 42.00000 43.37615 3.28% - 0s Cutting planes: Gomory: 3 Zero half: 27 Explored 15 nodes (641 simplex iterations) in 0.04 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.200000000000e+01, best bound 4.200000000000e+01, gap 0.0%