Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:22 2012 Optimize a model with 386 rows, 118 columns and 772 nonzeros Presolve removed 74 rows and 2 columns Presolve time: 0.00s Presolved: 312 rows, 116 columns, 667 nonzeros Variable types: 0 continuous, 116 integer (116 binary) Found heuristic solution: objective 41.0000000 Root relaxation: objective 5.100000e+01, 153 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 51.00000 0 92 41.00000 51.00000 24.4% - 0s 0 0 49.77778 0 104 41.00000 49.77778 21.4% - 0s H 0 0 45.0000000 49.77778 10.6% - 0s 0 0 49.09091 0 114 45.00000 49.09091 9.09% - 0s 0 0 48.66667 0 114 45.00000 48.66667 8.15% - 0s 0 0 48.42857 0 111 45.00000 48.42857 7.62% - 0s 0 0 48.20055 0 114 45.00000 48.20055 7.11% - 0s 0 0 48.11504 0 115 45.00000 48.11504 6.92% - 0s 0 0 48.07359 0 115 45.00000 48.07359 6.83% - 0s 0 0 47.98434 0 115 45.00000 47.98434 6.63% - 0s 0 0 47.92577 0 114 45.00000 47.92577 6.50% - 0s 0 0 47.79444 0 115 45.00000 47.79444 6.21% - 0s 0 0 47.75764 0 113 45.00000 47.75764 6.13% - 0s 0 0 47.69775 0 114 45.00000 47.69775 5.99% - 0s 0 0 47.65054 0 115 45.00000 47.65054 5.89% - 0s 0 0 47.62500 0 113 45.00000 47.62500 5.83% - 0s 0 0 47.62205 0 114 45.00000 47.62205 5.83% - 0s 0 0 47.62205 0 113 45.00000 47.62205 5.83% - 0s 0 2 47.61878 0 113 45.00000 47.61878 5.82% - 0s Cutting planes: Zero half: 59 Explored 23 nodes (1695 simplex iterations) in 0.12 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.500000000000e+01, best bound 4.500000000000e+01, gap 0.0%