current bounds on the number of colors: 0 -- 16 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 17:55:56 2012 Optimize a model with 504 rows, 189 columns and 1592 nonzeros Presolve time: 0.00s Presolved: 504 rows, 189 columns, 1592 nonzeros Variable types: 0 continuous, 189 integer (189 binary) Root relaxation: objective 0.000000e+00, 37 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (68 simplex iterations) in 0.00 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 0.000000000000e+00, best bound 0.000000000000e+00, gap 0.0% current bounds on the number of colors: 0 -- 8 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 17:55:56 2012 Optimize a model with 260 rows, 125 columns and 796 nonzeros Presolve time: 0.00s Presolved: 260 rows, 125 columns, 796 nonzeros Variable types: 0 continuous, 125 integer (125 binary) Root relaxation: objective 0.000000e+00, 33 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 27 - 0.00000 - - 0s 0 0 0.00000 0 29 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (363 simplex iterations) in 0.01 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound 1.000000000000e+00, gap - current bounds on the number of colors: 4 -- 8 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 17:55:56 2012 Optimize a model with 382 rows, 157 columns and 1194 nonzeros Presolve time: 0.00s Presolved: 382 rows, 157 columns, 1194 nonzeros Variable types: 0 continuous, 157 integer (157 binary) Root relaxation: objective 0.000000e+00, 33 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (79 simplex iterations) in 0.00 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 0.000000000000e+00, best bound 0.000000000000e+00, gap 0.0% current bounds on the number of colors: 4 -- 6 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 17:55:56 2012 Optimize a model with 321 rows, 141 columns and 995 nonzeros Presolve time: 0.00s Presolved: 321 rows, 141 columns, 995 nonzeros Variable types: 0 continuous, 141 integer (141 binary) Root relaxation: objective 0.000000e+00, 33 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (104 simplex iterations) in 0.00 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 0.000000000000e+00, best bound 0.000000000000e+00, gap 0.0% optimal solution found: number of colors: 5