Gurobi 5.0.1 (linux64) logging started Sun Nov 18 08:03:52 2012 Optimize a model with 573 rows, 520 columns and 1950 nonzeros Presolve removed 0 rows and 19 columns Presolve time: 0.00s Presolved: 573 rows, 501 columns, 1931 nonzeros Variable types: 0 continuous, 501 integer (500 binary) Found heuristic solution: objective 111.0000000 Root relaxation: objective 0.000000e+00, 319 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 208 111.00000 0.00000 100% - 0s H 0 0 79.0000000 0.00000 100% - 0s H 0 0 77.0000000 0.00000 100% - 0s H 0 0 72.0000000 0.00000 100% - 0s 0 0 0.43402 0 211 72.00000 0.43402 99.4% - 0s H 0 0 64.0000000 0.43402 99.3% - 0s 0 0 0.77194 0 212 64.00000 0.77194 98.8% - 0s H 0 0 63.0000000 0.77194 98.8% - 0s 0 0 0.77229 0 215 63.00000 0.77229 98.8% - 0s 0 0 0.77229 0 214 63.00000 0.77229 98.8% - 0s H 0 0 53.0000000 0.77229 98.5% - 0s H 0 0 45.0000000 0.77229 98.3% - 0s H 0 0 44.0000000 0.77229 98.2% - 0s H 0 0 43.0000000 0.77229 98.2% - 0s 0 2 0.77312 0 214 43.00000 0.77312 98.2% - 0s * 60 50 32 26.0000000 1.73016 93.3% 33.5 0s * 89 65 17 24.0000000 1.74273 92.7% 36.0 0s * 136 88 34 23.0000000 3.71667 83.8% 32.9 0s * 189 100 25 21.0000000 4.00000 81.0% 33.7 0s * 1532 426 40 20.0000000 10.93258 45.3% 30.3 2s 2930 681 14.82609 22 210 20.00000 13.25000 33.8% 25.8 5s 6502 872 17.01099 26 214 20.00000 15.35897 23.2% 22.2 10s 10017 417 18.31757 29 187 20.00000 16.98701 15.1% 21.4 15s Explored 10985 nodes (238225 simplex iterations) in 16.24 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.000000000000e+01, best bound 2.000000000000e+01, gap 0.0%