Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:51:44 2012 Optimize a model with 677 rows, 165 columns and 1354 nonzeros Presolve removed 141 rows and 1 columns Presolve time: 0.00s Presolved: 536 rows, 164 columns, 1169 nonzeros Variable types: 0 continuous, 164 integer (164 binary) Found heuristic solution: objective 52.0000000 Root relaxation: objective 6.850000e+01, 272 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 68.50000 0 133 52.00000 68.50000 31.7% - 0s 0 0 67.33766 0 162 52.00000 67.33766 29.5% - 0s 0 0 66.21658 0 163 52.00000 66.21658 27.3% - 0s H 0 0 53.0000000 66.21658 24.9% - 0s 0 0 65.20430 0 160 53.00000 65.20430 23.0% - 0s 0 0 64.94650 0 161 53.00000 64.94650 22.5% - 0s 0 0 64.77153 0 161 53.00000 64.77153 22.2% - 0s 0 0 64.48689 0 161 53.00000 64.48689 21.7% - 0s 0 0 64.40266 0 164 53.00000 64.40266 21.5% - 0s 0 0 64.38857 0 163 53.00000 64.38857 21.5% - 0s 0 0 64.31910 0 161 53.00000 64.31910 21.4% - 0s 0 0 64.28360 0 163 53.00000 64.28360 21.3% - 0s 0 0 64.28360 0 161 53.00000 64.28360 21.3% - 0s 0 2 64.28193 0 161 53.00000 64.28193 21.3% - 0s H 34 19 54.0000000 64.09193 18.7% 49.1 0s * 35 18 7 56.0000000 64.09193 14.4% 49.3 0s 614 249 58.76923 11 162 56.00000 61.67500 10.1% 39.0 5s 627 257 61.09375 9 164 56.00000 61.67500 10.1% 38.2 10s H 1115 280 57.0000000 61.20161 7.37% 46.9 15s Cutting planes: Zero half: 206 Mod-K: 2 Explored 2155 nodes (91427 simplex iterations) in 17.37 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%