Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:26 2012 Optimize a model with 376 rows, 122 columns and 752 nonzeros Presolve removed 63 rows and 4 columns Presolve time: 0.00s Presolved: 313 rows, 118 columns, 658 nonzeros Variable types: 0 continuous, 118 integer (118 binary) Found heuristic solution: objective 43.0000000 Root relaxation: objective 5.450000e+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 54.50000 0 101 43.00000 54.50000 26.7% - 0s 0 0 53.27536 0 117 43.00000 53.27536 23.9% - 0s H 0 0 44.0000000 53.27536 21.1% - 0s 0 0 52.86364 0 118 44.00000 52.86364 20.1% - 0s 0 0 52.54120 0 118 44.00000 52.54120 19.4% - 0s 0 0 52.20945 0 118 44.00000 52.20945 18.7% - 0s H 0 0 47.0000000 52.20945 11.1% - 0s 0 0 51.77066 0 118 47.00000 51.77066 10.2% - 0s 0 0 51.50491 0 117 47.00000 51.50491 9.58% - 0s 0 0 51.36838 0 115 47.00000 51.36838 9.29% - 0s 0 0 51.26722 0 115 47.00000 51.26722 9.08% - 0s 0 0 51.15194 0 118 47.00000 51.15194 8.83% - 0s 0 0 51.01695 0 117 47.00000 51.01695 8.55% - 0s 0 0 50.91746 0 118 47.00000 50.91746 8.34% - 0s 0 0 50.84300 0 118 47.00000 50.84300 8.18% - 0s 0 0 50.63310 0 117 47.00000 50.63310 7.73% - 0s 0 0 50.56627 0 118 47.00000 50.56627 7.59% - 0s 0 0 50.45967 0 116 47.00000 50.45967 7.36% - 0s 0 0 50.45171 0 116 47.00000 50.45171 7.34% - 0s 0 0 50.45171 0 116 47.00000 50.45171 7.34% - 0s 0 2 50.44103 0 116 47.00000 50.44103 7.32% - 0s * 83 5 5 48.0000000 49.23860 2.58% 35.1 0s Cutting planes: Zero half: 104 Explored 89 nodes (4024 simplex iterations) in 0.20 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.800000000000e+01, best bound 4.800000000000e+01, gap 0.0%