Gurobi 5.0.1 (linux64) logging started Sun Nov 18 09:13:53 2012 Optimize a model with 607 rows, 544 columns and 2059 nonzeros Presolve removed 0 rows and 8 columns Presolve time: 0.00s Presolved: 607 rows, 536 columns, 2051 nonzeros Variable types: 0 continuous, 536 integer (535 binary) Found heuristic solution: objective 107.0000000 Root relaxation: objective 0.000000e+00, 293 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 0 221 107.00000 0.00000 100% - 0s H 0 0 85.0000000 0.00000 100% - 0s H 0 0 76.0000000 0.00000 100% - 0s 0 0 0.42327 0 222 76.00000 0.42327 99.4% - 0s H 0 0 66.0000000 0.42327 99.4% - 0s 0 0 1.02216 0 224 66.00000 1.02216 98.5% - 0s H 0 0 57.0000000 1.02216 98.2% - 0s 0 0 1.21956 0 227 57.00000 1.21956 97.9% - 0s H 0 0 54.0000000 1.21956 97.7% - 0s 0 0 1.21956 0 226 54.00000 1.21956 97.7% - 0s 0 0 1.21956 0 226 54.00000 1.21956 97.7% - 0s H 0 0 48.0000000 1.21956 97.5% - 0s H 0 0 47.0000000 1.21956 97.4% - 0s 0 2 1.22037 0 226 47.00000 1.22037 97.4% - 0s H 27 27 43.0000000 1.24354 97.1% 65.9 0s H 54 54 39.0000000 1.24354 96.8% 44.4 0s * 76 74 45 26.0000000 1.24354 95.2% 35.3 0s H 81 63 25.0000000 1.24354 95.0% 34.9 0s * 117 75 19 24.0000000 1.42977 94.0% 38.2 0s * 737 328 32 22.0000000 8.42857 61.7% 37.3 1s * 1086 323 28 21.0000000 8.42857 59.9% 36.8 2s 2386 426 19.84211 20 221 21.00000 13.76699 34.4% 32.7 5s Explored 4856 nodes (156291 simplex iterations) in 9.56 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%