Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:07 2012 Optimize a model with 217 rows, 94 columns and 434 nonzeros Presolve removed 42 rows and 8 columns Presolve time: 0.00s Presolved: 175 rows, 86 columns, 361 nonzeros Variable types: 0 continuous, 86 integer (86 binary) Found heuristic solution: objective 36.0000000 Root relaxation: objective 4.350000e+01, 113 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 43.50000 0 69 36.00000 43.50000 20.8% - 0s H 0 0 37.0000000 43.50000 17.6% - 0s 0 0 42.75000 0 77 37.00000 42.75000 15.5% - 0s 0 0 42.20000 0 81 37.00000 42.20000 14.1% - 0s H 0 0 38.0000000 42.20000 11.1% - 0s 0 0 41.75000 0 74 38.00000 41.75000 9.87% - 0s 0 0 41.41667 0 72 38.00000 41.41667 8.99% - 0s 0 0 41.10000 0 71 38.00000 41.10000 8.16% - 0s 0 0 41.00000 0 71 38.00000 41.00000 7.89% - 0s 0 0 40.95000 0 75 38.00000 40.95000 7.76% - 0s 0 0 40.88571 0 76 38.00000 40.88571 7.59% - 0s 0 0 40.50000 0 71 38.00000 40.50000 6.58% - 0s 0 0 40.33333 0 73 38.00000 40.33333 6.14% - 0s 0 0 40.33333 0 73 38.00000 40.33333 6.14% - 0s 0 0 40.33333 0 61 38.00000 40.33333 6.14% - 0s H 0 0 39.0000000 40.33333 3.42% - 0s H 0 0 40.0000000 40.33333 0.83% - 0s Cutting planes: Zero half: 20 Explored 0 nodes (455 simplex iterations) in 0.03 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.000000000000e+01, best bound 4.000000000000e+01, gap 0.0%