Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:52:02 2012 Optimize a model with 722 rows, 165 columns and 1444 nonzeros Presolve removed 157 rows and 0 columns Presolve time: 0.00s Presolved: 565 rows, 165 columns, 1244 nonzeros Variable types: 0 continuous, 165 integer (165 binary) Found heuristic solution: objective 48.0000000 Root relaxation: objective 6.550000e+01, 286 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 65.50000 0 131 48.00000 65.50000 36.5% - 0s 0 0 64.03189 0 162 48.00000 64.03189 33.4% - 0s H 0 0 49.0000000 64.03189 30.7% - 0s 0 0 62.85714 0 153 49.00000 62.85714 28.3% - 0s 0 0 62.74825 0 159 49.00000 62.74825 28.1% - 0s H 0 0 51.0000000 62.74825 23.0% - 0s 0 0 62.14442 0 160 51.00000 62.14442 21.9% - 0s 0 0 61.66559 0 163 51.00000 61.66559 20.9% - 0s 0 0 61.49187 0 165 51.00000 61.49187 20.6% - 0s 0 0 61.31022 0 163 51.00000 61.31022 20.2% - 0s 0 0 61.18232 0 163 51.00000 61.18232 20.0% - 0s 0 0 61.12332 0 163 51.00000 61.12332 19.8% - 0s 0 0 60.98793 0 165 51.00000 60.98793 19.6% - 0s 0 0 60.90605 0 165 51.00000 60.90605 19.4% - 0s 0 0 60.89899 0 165 51.00000 60.89899 19.4% - 0s 0 0 60.89899 0 163 51.00000 60.89899 19.4% - 0s 0 2 60.89841 0 163 51.00000 60.89841 19.4% - 0s H 10 10 53.0000000 60.76762 14.7% 64.7 0s * 12 10 7 54.0000000 60.76762 12.5% 56.2 0s 611 184 56.55734 12 164 54.00000 58.22468 7.82% 40.7 5s 623 192 56.55036 9 159 54.00000 58.22468 7.82% 39.9 10s 1796 316 57.00000 34 125 54.00000 57.22449 5.97% 44.1 15s Cutting planes: Gomory: 2 Zero half: 196 Explored 3136 nodes (123533 simplex iterations) in 17.53 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%