Gurobi 5.0.1 (linux64) logging started Sun Nov 18 08:03:14 2012 Optimize a model with 607 rows, 537 columns and 2052 nonzeros Presolve removed 0 rows and 21 columns Presolve time: 0.00s Presolved: 607 rows, 516 columns, 2031 nonzeros Variable types: 0 continuous, 516 integer (515 binary) Found heuristic solution: objective 109.0000000 Root relaxation: objective 0.000000e+00, 260 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 0 107.0000000 0.00000 100% - 0s H 0 0 89.0000000 0.00000 100% - 0s H 0 0 83.0000000 0.00000 100% - 0s 0 0 0.44171 0 209 83.00000 0.44171 99.5% - 0s 0 0 0.76000 0 210 83.00000 0.76000 99.1% - 0s H 0 0 76.0000000 0.76000 99.0% - 0s H 0 0 73.0000000 0.76000 99.0% - 0s 0 0 0.76152 0 212 73.00000 0.76152 99.0% - 0s 0 0 0.76152 0 211 73.00000 0.76152 99.0% - 0s H 0 0 68.0000000 0.76152 98.9% - 0s H 0 0 66.0000000 0.76152 98.8% - 0s 0 2 0.76362 0 211 66.00000 0.76362 98.8% - 0s H 27 27 53.0000000 1.00000 98.1% 38.6 0s H 81 77 35.0000000 1.00000 97.1% 32.0 0s * 83 60 48 33.0000000 1.00000 97.0% 33.6 0s * 121 75 19 31.0000000 2.65672 91.4% 37.2 0s H 189 109 28.0000000 4.04545 85.6% 37.3 0s * 700 284 38 26.0000000 9.56863 63.2% 39.0 1s 2452 657 20.55191 25 226 26.00000 14.25000 45.2% 32.6 5s 5269 1080 20.65957 24 230 26.00000 17.58824 32.4% 28.2 10s 8254 1311 cutoff 28 26.00000 19.23214 26.0% 27.0 15s 11590 1178 24.00000 24 205 26.00000 20.59722 20.8% 25.9 20s 14843 635 24.74324 27 192 26.00000 22.15625 14.8% 25.6 25s Explored 16202 nodes (409057 simplex iterations) in 26.63 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.600000000000e+01, best bound 2.600000000000e+01, gap 0.0%