Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:51 2012 Optimize a model with 477 rows, 134 columns and 954 nonzeros Presolve removed 89 rows and 0 columns Presolve time: 0.00s Presolved: 388 rows, 134 columns, 831 nonzeros Variable types: 0 continuous, 134 integer (134 binary) Found heuristic solution: objective 44.0000000 Root relaxation: objective 5.700000e+01, 185 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 57.00000 0 110 44.00000 57.00000 29.5% - 0s 0 0 55.33333 0 130 44.00000 55.33333 25.8% - 0s H 0 0 46.0000000 55.33333 20.3% - 0s 0 0 54.83333 0 120 46.00000 54.83333 19.2% - 0s 0 0 54.64815 0 129 46.00000 54.64815 18.8% - 0s H 0 0 48.0000000 54.64815 13.9% - 0s 0 0 54.21875 0 129 48.00000 54.21875 13.0% - 0s H 0 0 49.0000000 54.21875 10.7% - 0s 0 0 53.72727 0 129 49.00000 53.72727 9.65% - 0s 0 0 53.35294 0 131 49.00000 53.35294 8.88% - 0s 0 0 53.12317 0 132 49.00000 53.12317 8.41% - 0s 0 0 52.94236 0 132 49.00000 52.94236 8.05% - 0s 0 0 52.89193 0 131 49.00000 52.89193 7.94% - 0s 0 0 52.77451 0 130 49.00000 52.77451 7.70% - 0s 0 0 52.72157 0 130 49.00000 52.72157 7.60% - 0s 0 0 52.65537 0 130 49.00000 52.65537 7.46% - 0s 0 0 52.62849 0 132 49.00000 52.62849 7.41% - 0s 0 0 52.62849 0 132 49.00000 52.62849 7.41% - 0s 0 2 52.62833 0 132 49.00000 52.62833 7.40% - 0s Cutting planes: Gomory: 1 Zero half: 115 Explored 130 nodes (5818 simplex iterations) in 0.26 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%