current bounds on the number of colors: 0 -- 15 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 17:55:55 2012 Optimize a model with 379 rows, 157 columns and 1197 nonzeros Presolve time: 0.00s Presolved: 379 rows, 157 columns, 1197 nonzeros Variable types: 0 continuous, 157 integer (157 binary) Root relaxation: objective 0.000000e+00, 32 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 (84 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 -- 7 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 17:55:55 2012 Optimize a model with 171 rows, 97 columns and 513 nonzeros Presolve time: 0.00s Presolved: 171 rows, 97 columns, 513 nonzeros Variable types: 0 continuous, 97 integer (97 binary) Root relaxation: objective 0.000000e+00, 32 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 24 - 0.00000 - - 0s 0 0 0.00000 0 30 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (237 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: 3 -- 7 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 17:55:55 2012 Optimize a model with 275 rows, 127 columns and 855 nonzeros Presolve time: 0.00s Presolved: 275 rows, 127 columns, 855 nonzeros Variable types: 0 continuous, 127 integer (127 binary) Root relaxation: objective 0.000000e+00, 32 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 (120 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: 3 -- 5 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 17:55:55 2012 Optimize a model with 223 rows, 112 columns and 684 nonzeros Presolve time: 0.00s Presolved: 223 rows, 112 columns, 684 nonzeros Variable types: 0 continuous, 112 integer (112 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 19 - 0.00000 - - 0s 0 0 0.00000 0 21 - 0.00000 - - 0s 0 0 0.00000 0 18 - 0.00000 - - 0s 0 0 0.00000 0 39 - 0.00000 - - 0s 0 0 0.00000 0 28 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Cutting planes: Zero half: 7 Explored 0 nodes (632 simplex iterations) in 0.02 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound 1.000000000000e+00, gap - optimal solution found: number of colors: 5