Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:42:29 2012 Optimize a model with 690 rows, 160 columns and 1380 nonzeros Presolve removed 164 rows and 0 columns Presolve time: 0.00s Presolved: 526 rows, 160 columns, 1160 nonzeros Variable types: 0 continuous, 160 integer (160 binary) Found heuristic solution: objective 49.0000000 Root relaxation: objective 6.425000e+01, 352 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 64.25000 0 128 49.00000 64.25000 31.1% - 0s 0 0 63.23185 0 156 49.00000 63.23185 29.0% - 0s H 0 0 50.0000000 63.23185 26.5% - 0s 0 0 62.05769 0 158 50.00000 62.05769 24.1% - 0s 0 0 61.29941 0 158 50.00000 61.29941 22.6% - 0s 0 0 60.98936 0 158 50.00000 60.98936 22.0% - 0s 0 0 60.67861 0 158 50.00000 60.67861 21.4% - 0s 0 0 60.51955 0 158 50.00000 60.51955 21.0% - 0s 0 0 60.35464 0 160 50.00000 60.35464 20.7% - 0s 0 0 60.26548 0 158 50.00000 60.26548 20.5% - 0s 0 0 60.23235 0 158 50.00000 60.23235 20.5% - 0s 0 0 60.23235 0 158 50.00000 60.23235 20.5% - 0s H 0 0 52.0000000 60.23235 15.8% - 0s 0 2 60.22810 0 157 52.00000 60.22810 15.8% - 0s H 147 71 53.0000000 59.09836 11.5% 44.3 0s 753 242 56.26923 23 109 53.00000 57.50313 8.50% 43.3 5s H 1379 284 54.0000000 57.50313 6.49% 37.2 5s Cutting planes: Gomory: 4 Zero half: 66 Mod-K: 1 Explored 2443 nodes (79015 simplex iterations) in 7.24 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.400000000000e+01, best bound 5.400000000000e+01, gap 0.0%