Gurobi 5.0.1 (linux64) logging started Sun Nov 18 07:26:06 2012 Optimize a model with 575 rows, 516 columns and 1951 nonzeros Presolve removed 0 rows and 16 columns Presolve time: 0.00s Presolved: 575 rows, 500 columns, 1935 nonzeros Variable types: 0 continuous, 500 integer (499 binary) Found heuristic solution: objective 103.0000000 Root relaxation: objective 0.000000e+00, 270 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 0 208 103.00000 0.00000 100% - 0s H 0 0 71.0000000 0.00000 100% - 0s H 0 0 68.0000000 0.00000 100% - 0s 0 0 0.42250 0 210 68.00000 0.42250 99.4% - 0s H 0 0 61.0000000 0.42250 99.3% - 0s 0 0 1.07007 0 212 61.00000 1.07007 98.2% - 0s H 0 0 43.0000000 1.07007 97.5% - 0s 0 0 1.22736 0 212 43.00000 1.22736 97.1% - 0s 0 0 1.22850 0 215 43.00000 1.22850 97.1% - 0s 0 0 1.22850 0 215 43.00000 1.22850 97.1% - 0s 0 2 1.23001 0 214 43.00000 1.23001 97.1% - 0s * 47 44 26 27.0000000 2.91718 89.2% 36.8 0s H 81 53 25.0000000 2.96302 88.1% 32.7 0s * 106 59 12 24.0000000 6.54237 72.7% 34.5 0s H 520 161 23.0000000 12.53333 45.5% 34.1 1s Cutting planes: Gomory: 4 Mod-K: 1 Explored 1501 nodes (49121 simplex iterations) in 2.69 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.300000000000e+01, best bound 2.300000000000e+01, gap 0.0%