Gurobi 5.0.1 (linux64) logging started Sun Nov 18 07:20:44 2012 Optimize a model with 571 rows, 513 columns and 1938 nonzeros Presolve removed 0 rows and 16 columns Presolve time: 0.00s Presolved: 571 rows, 497 columns, 1922 nonzeros Variable types: 0 continuous, 497 integer (496 binary) Found heuristic solution: objective 109.0000000 Root relaxation: objective 0.000000e+00, 292 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 206 109.00000 0.00000 100% - 0s H 0 0 67.0000000 0.00000 100% - 0s 0 0 0.44660 0 207 67.00000 0.44660 99.3% - 0s H 0 0 60.0000000 0.44660 99.3% - 0s 0 0 0.99398 0 208 60.00000 0.99398 98.3% - 0s H 0 0 54.0000000 0.99398 98.2% - 0s H 0 0 44.0000000 0.99398 97.7% - 0s 0 0 1.15936 0 210 44.00000 1.15936 97.4% - 0s H 0 0 39.0000000 1.15936 97.0% - 0s 0 0 1.16052 0 215 39.00000 1.16052 97.0% - 0s 0 0 1.16052 0 215 39.00000 1.16052 97.0% - 0s H 0 0 36.0000000 1.16052 96.8% - 0s 0 2 1.16082 0 211 36.00000 1.16082 96.8% - 0s H 27 27 35.0000000 1.16101 96.7% 48.3 0s * 53 53 29 23.0000000 1.16101 95.0% 33.8 0s * 57 47 31 22.0000000 1.16101 94.7% 31.9 0s 2721 789 18.68927 21 209 22.00000 12.00000 45.5% 31.9 5s 5959 980 20.59748 27 196 22.00000 15.43850 29.8% 30.1 10s 10092 535 20.04118 23 203 22.00000 18.60000 15.5% 27.2 15s Explored 11423 nodes (301863 simplex iterations) in 16.24 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.200000000000e+01, best bound 2.200000000000e+01, gap 0.0%