Gurobi 5.0.1 (linux64) logging started Mon Feb 4 16:01:15 2013 Optimize a model with 129 rows, 81 columns and 405 nonzeros Presolve removed 60 rows and 44 columns Presolve time: 0.00s Presolved: 69 rows, 37 columns, 231 nonzeros Variable types: 4 continuous, 33 integer (33 binary) Found heuristic solution: objective 942.0000000 Found heuristic solution: objective 868.0000000 Root relaxation: objective 8.250250e+02, 10 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 825.02500 0 5 868.00000 825.02500 4.95% - 0s 0 0 828.28133 0 12 868.00000 828.28133 4.58% - 0s H 0 0 836.0000000 828.28133 0.92% - 0s H 0 0 832.0000000 828.28133 0.45% - 0s 0 0 829.85070 0 12 832.00000 829.85070 0.26% - 0s 0 0 829.85070 0 7 832.00000 829.85070 0.26% - 0s 0 0 830.31429 0 4 832.00000 830.31429 0.20% - 0s Cutting planes: MIR: 2 Explored 0 nodes (71 simplex iterations) in 0.01 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 8.320000000000e+02, best bound 8.320000000000e+02, gap 0.0%