Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:08 2012 Optimize a model with 239 rows, 96 columns and 478 nonzeros Presolve removed 39 rows and 7 columns Presolve time: 0.00s Presolved: 200 rows, 89 columns, 407 nonzeros Variable types: 0 continuous, 89 integer (89 binary) Found heuristic solution: objective 38.0000000 Root relaxation: objective 4.550000e+01, 115 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 45.50000 0 73 38.00000 45.50000 19.7% - 0s 0 0 43.80000 0 73 38.00000 43.80000 15.3% - 0s H 0 0 41.0000000 43.80000 6.83% - 0s 0 0 43.28571 0 79 41.00000 43.28571 5.57% - 0s 0 0 43.00000 0 79 41.00000 43.00000 4.88% - 0s 0 0 42.80000 0 69 41.00000 42.80000 4.39% - 0s 0 0 42.41667 0 67 41.00000 42.41667 3.46% - 0s 0 0 42.14286 0 63 41.00000 42.14286 2.79% - 0s 0 0 42.00000 0 50 41.00000 42.00000 2.44% - 0s Cutting planes: Zero half: 43 Explored 0 nodes (334 simplex iterations) in 0.02 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.100000000000e+01, best bound 4.100000000000e+01, gap 0.0%