Gurobi 5.0.1 (linux64) logging started Sun Nov 18 07:47:59 2012 Optimize a model with 563 rows, 513 columns and 1918 nonzeros Presolve removed 0 rows and 16 columns Presolve time: 0.00s Presolved: 563 rows, 497 columns, 1902 nonzeros Variable types: 0 continuous, 497 integer (496 binary) Found heuristic solution: objective 104.0000000 Root relaxation: objective 0.000000e+00, 301 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 0 201 104.00000 0.00000 100% - 0s H 0 0 73.0000000 0.00000 100% - 0s 0 0 0.37446 0 203 73.00000 0.37446 99.5% - 0s H 0 0 66.0000000 0.37446 99.4% - 0s 0 0 0.89558 0 207 66.00000 0.89558 98.6% - 0s H 0 0 56.0000000 0.89558 98.4% - 0s 0 0 0.89621 0 210 56.00000 0.89621 98.4% - 0s 0 0 0.89621 0 208 56.00000 0.89621 98.4% - 0s 0 2 0.89633 0 208 56.00000 0.89633 98.4% - 0s H 27 27 40.0000000 1.00000 97.5% 47.4 0s H 54 54 39.0000000 1.00000 97.4% 33.2 0s * 74 51 43 26.0000000 1.00000 96.2% 36.3 0s * 401 241 23 25.0000000 5.47423 78.1% 34.3 0s * 420 229 16 24.0000000 6.71757 72.0% 34.0 0s * 704 333 51 23.0000000 7.53846 67.2% 32.0 1s H 1248 434 22.0000000 7.53846 65.7% 30.0 2s * 1258 384 38 21.0000000 7.53846 64.1% 30.0 2s 2804 951 cutoff 27 21.00000 11.00000 47.6% 27.6 5s 6048 1676 19.94915 26 208 21.00000 13.50000 35.7% 24.8 10s 9338 2065 cutoff 29 21.00000 14.51493 30.9% 24.0 15s 12876 2155 18.79487 32 189 21.00000 15.18182 27.7% 24.1 20s 16320 1981 18.72727 27 206 21.00000 15.76923 24.9% 23.8 25s 19921 1619 18.63128 27 209 21.00000 16.38272 22.0% 24.1 30s 23444 1033 19.83333 30 191 21.00000 17.34146 17.4% 24.7 35s Explored 25568 nodes (639018 simplex iterations) in 37.82 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.100000000000e+01, best bound 2.100000000000e+01, gap 0.0%