Gurobi 5.0.1 (linux64) logging started Mon Feb 4 16:00:51 2013 Optimize a model with 45 rows, 36 columns and 120 nonzeros Presolve removed 15 rows and 15 columns Presolve time: 0.00s Presolved: 30 rows, 21 columns, 90 nonzeros Variable types: 6 continuous, 15 integer (15 binary) Root relaxation: objective 3.970000e+02, 13 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 397.00000 0 11 - 397.00000 - - 0s 0 0 540.32156 0 10 - 540.32156 - - 0s 0 0 541.86709 0 10 - 541.86709 - - 0s 0 0 541.86709 0 10 - 541.86709 - - 0s H 0 0 834.0000000 541.86709 35.0% - 0s 0 2 557.43675 0 10 834.00000 557.43675 33.2% - 0s * 11 5 8 826.0000000 557.63920 32.5% 1.8 0s * 24 9 7 825.0000000 562.73529 31.8% 2.2 0s Cutting planes: MIR: 26 Explored 100 nodes (307 simplex iterations) in 0.01 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 8.250000000000e+02, best bound 8.250000000000e+02, gap 0.0%