Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:40 2012 Optimize a model with 462 rows, 130 columns and 924 nonzeros Presolve removed 92 rows and 0 columns Presolve time: 0.00s Presolved: 370 rows, 130 columns, 797 nonzeros Variable types: 0 continuous, 130 integer (130 binary) Found heuristic solution: objective 40.0000000 Root relaxation: objective 5.316667e+01, 199 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 53.16667 0 114 40.00000 53.16667 32.9% - 0s H 0 0 42.0000000 53.16667 26.6% - 0s 0 0 52.43056 0 126 42.00000 52.43056 24.8% - 0s 0 0 52.15385 0 124 42.00000 52.15385 24.2% - 0s H 0 0 43.0000000 52.15385 21.3% - 0s 0 0 51.34129 0 129 43.00000 51.34129 19.4% - 0s 0 0 50.88291 0 127 43.00000 50.88291 18.3% - 0s H 0 0 44.0000000 50.88291 15.6% - 0s 0 0 50.72092 0 129 44.00000 50.72092 15.3% - 0s 0 0 50.54453 0 129 44.00000 50.54453 14.9% - 0s 0 0 50.40762 0 127 44.00000 50.40762 14.6% - 0s 0 0 50.37317 0 130 44.00000 50.37317 14.5% - 0s 0 0 50.29836 0 130 44.00000 50.29836 14.3% - 0s H 0 0 45.0000000 50.29836 11.8% - 0s 0 0 50.22642 0 130 45.00000 50.22642 11.6% - 0s 0 0 50.20722 0 128 45.00000 50.20722 11.6% - 0s 0 0 50.19492 0 129 45.00000 50.19492 11.5% - 0s 0 0 50.19492 0 127 45.00000 50.19492 11.5% - 0s 0 2 50.18541 0 127 45.00000 50.18541 11.5% - 0s * 27 18 7 46.0000000 49.77564 8.21% 36.4 0s Cutting planes: Zero half: 91 Explored 195 nodes (6207 simplex iterations) in 0.26 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.600000000000e+01, best bound 4.600000000000e+01, gap 0.0%