Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:14 2012 Optimize a model with 329 rows, 109 columns and 658 nonzeros Presolve removed 64 rows and 7 columns Presolve time: 0.00s Presolved: 265 rows, 102 columns, 557 nonzeros Variable types: 0 continuous, 102 integer (102 binary) Found heuristic solution: objective 38.0000000 Root relaxation: objective 4.800000e+01, 127 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 48.00000 0 76 38.00000 48.00000 26.3% - 0s H 0 0 41.0000000 48.00000 17.1% - 0s 0 0 47.00000 0 96 41.00000 47.00000 14.6% - 0s H 0 0 42.0000000 47.00000 11.9% - 0s 0 0 46.64286 0 98 42.00000 46.64286 11.1% - 0s 0 0 46.63636 0 99 42.00000 46.63636 11.0% - 0s 0 0 46.32143 0 99 42.00000 46.32143 10.3% - 0s H 0 0 43.0000000 46.32143 7.72% - 0s 0 0 46.03074 0 100 43.00000 46.03074 7.05% - 0s 0 0 45.92308 0 99 43.00000 45.92308 6.80% - 0s 0 0 45.60000 0 97 43.00000 45.60000 6.05% - 0s 0 0 45.36364 0 100 43.00000 45.36364 5.50% - 0s 0 0 45.23223 0 99 43.00000 45.23223 5.19% - 0s 0 0 44.95000 0 99 43.00000 44.95000 4.53% - 0s 0 0 44.88462 0 98 43.00000 44.88462 4.38% - 0s 0 0 44.87500 0 101 43.00000 44.87500 4.36% - 0s 0 0 44.87500 0 92 43.00000 44.87500 4.36% - 0s 0 2 44.87500 0 91 43.00000 44.87500 4.36% - 0s Cutting planes: Zero half: 79 Explored 51 nodes (1831 simplex iterations) in 0.09 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.300000000000e+01, best bound 4.300000000000e+01, gap 0.0%