Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:44:10 2012 Optimize a model with 648 rows, 161 columns and 1296 nonzeros Presolve removed 128 rows and 0 columns Presolve time: 0.01s Presolved: 520 rows, 161 columns, 1120 nonzeros Variable types: 0 continuous, 161 integer (161 binary) Found heuristic solution: objective 48.0000000 Root relaxation: objective 6.700000e+01, 295 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 67.00000 0 132 48.00000 67.00000 39.6% - 0s 0 0 65.90820 0 159 48.00000 65.90820 37.3% - 0s H 0 0 52.0000000 65.90820 26.7% - 0s 0 0 64.23324 0 158 52.00000 64.23324 23.5% - 0s 0 0 63.56204 0 158 52.00000 63.56204 22.2% - 0s 0 0 63.35494 0 159 52.00000 63.35494 21.8% - 0s 0 0 63.23511 0 159 52.00000 63.23511 21.6% - 0s 0 0 62.91920 0 161 52.00000 62.91920 21.0% - 0s H 0 0 54.0000000 62.91920 16.5% - 0s 0 0 62.80328 0 161 54.00000 62.80328 16.3% - 0s 0 0 62.76761 0 160 54.00000 62.76761 16.2% - 0s 0 0 62.65922 0 161 54.00000 62.65922 16.0% - 0s 0 0 62.56127 0 160 54.00000 62.56127 15.9% - 0s 0 0 62.42904 0 161 54.00000 62.42904 15.6% - 0s H 0 0 55.0000000 62.42904 13.5% - 0s 0 0 62.34195 0 161 55.00000 62.34195 13.3% - 0s 0 0 62.28433 0 160 55.00000 62.28433 13.2% - 0s 0 0 62.23255 0 159 55.00000 62.23255 13.2% - 0s 0 0 62.19263 0 161 55.00000 62.19263 13.1% - 0s 0 0 62.19263 0 161 55.00000 62.19263 13.1% - 0s 0 2 62.18796 0 160 55.00000 62.18796 13.1% - 0s * 16 14 10 56.0000000 62.00708 10.7% 70.6 0s H 27 17 57.0000000 62.00637 8.78% 77.6 0s Cutting planes: Gomory: 1 Zero half: 159 Explored 417 nodes (22071 simplex iterations) in 1.01 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.700000000000e+01, best bound 5.700000000000e+01, gap 0.0%