Gurobi 5.0.1 (linux64) logging started Sun Nov 18 00:47:27 2012 Optimize a model with 267 rows, 186 columns and 851 nonzeros Presolve time: 0.00s Presolved: 267 rows, 186 columns, 851 nonzeros Variable types: 0 continuous, 186 integer (186 binary) Found heuristic solution: objective 60.0000000 Root relaxation: objective 0.000000e+00, 93 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 53 60.00000 0.00000 100% - 0s H 0 0 51.0000000 0.00000 100% - 0s H 0 0 49.0000000 0.00000 100% - 0s 0 0 0.60541 0 55 49.00000 0.60541 98.8% - 0s H 0 0 44.0000000 0.60541 98.6% - 0s 0 0 0.66475 0 57 44.00000 0.66475 98.5% - 0s H 0 0 39.0000000 0.66475 98.3% - 0s 0 0 0.78623 0 58 39.00000 0.78623 98.0% - 0s 0 0 0.80399 0 58 39.00000 0.80399 97.9% - 0s 0 0 0.81925 0 63 39.00000 0.81925 97.9% - 0s 0 0 0.83560 0 58 39.00000 0.83560 97.9% - 0s 0 0 0.83560 0 58 39.00000 0.83560 97.9% - 0s 0 0 0.83560 0 58 39.00000 0.83560 97.9% - 0s H 0 0 36.0000000 0.83560 97.7% - 0s 0 2 0.84814 0 58 36.00000 0.84814 97.6% - 0s * 269 166 19 35.0000000 10.27586 70.6% 20.2 0s * 274 155 21 33.0000000 10.27586 68.9% 19.9 0s * 398 196 18 32.0000000 10.77174 66.3% 19.2 0s * 463 216 15 31.0000000 12.29602 60.3% 19.0 0s * 636 256 30 30.0000000 14.55863 51.5% 20.1 0s * 797 293 29 29.0000000 14.55863 49.8% 21.1 0s * 990 275 36 28.0000000 14.55863 48.0% 20.9 0s H 2375 246 27.0000000 19.02564 29.5% 20.5 1s Explored 3276 nodes (66213 simplex iterations) in 1.95 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.700000000000e+01, best bound 2.700000000000e+01, gap 0.0%