Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:25 2012 Optimize a model with 342 rows, 121 columns and 684 nonzeros Presolve removed 92 rows and 9 columns Presolve time: 0.00s Presolved: 250 rows, 112 columns, 527 nonzeros Variable types: 0 continuous, 112 integer (112 binary) Found heuristic solution: objective 46.0000000 Root relaxation: objective 5.400000e+01, 160 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 54.00000 0 92 46.00000 54.00000 17.4% - 0s 0 0 52.80000 0 105 46.00000 52.80000 14.8% - 0s H 0 0 47.0000000 52.80000 12.3% - 0s 0 0 52.00000 0 88 47.00000 52.00000 10.6% - 0s 0 0 51.70588 0 108 47.00000 51.70588 10.0% - 0s 0 0 51.44444 0 105 47.00000 51.44444 9.46% - 0s 0 0 51.27500 0 108 47.00000 51.27500 9.10% - 0s H 0 0 48.0000000 51.27500 6.82% - 0s 0 0 51.00000 0 109 48.00000 51.00000 6.25% - 0s 0 0 50.83333 0 106 48.00000 50.83333 5.90% - 0s 0 0 50.72000 0 108 48.00000 50.72000 5.67% - 0s 0 0 50.66568 0 110 48.00000 50.66568 5.55% - 0s 0 0 50.50000 0 108 48.00000 50.50000 5.21% - 0s 0 0 50.50000 0 109 48.00000 50.50000 5.21% - 0s 0 0 50.50000 0 101 48.00000 50.50000 5.21% - 0s H 0 0 49.0000000 50.50000 3.06% - 0s 0 2 50.50000 0 101 49.00000 50.50000 3.06% - 0s Cutting planes: Zero half: 26 Explored 15 nodes (1188 simplex iterations) in 0.06 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.900000000000e+01, best bound 4.900000000000e+01, gap 0.0%