current bounds on the number of colors: 0 -- 19 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 17:55:58 2012 Optimize a model with 838 rows, 262 columns and 2628 nonzeros Presolve time: 0.00s Presolved: 838 rows, 262 columns, 2628 nonzeros Variable types: 0 continuous, 262 integer (262 binary) Root relaxation: objective 0.000000e+00, 44 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 (109 simplex iterations) in 0.01 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 -- 9 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 17:55:58 2012 Optimize a model with 383 rows, 167 columns and 1168 nonzeros Presolve time: 0.00s Presolved: 383 rows, 167 columns, 1168 nonzeros Variable types: 0 continuous, 167 integer (167 binary) Root relaxation: objective 0.000000e+00, 38 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 36 - 0.00000 - - 0s 0 0 0.00000 0 34 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (326 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 - current bounds on the number of colors: 4 -- 9 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 17:55:58 2012 Optimize a model with 565 rows, 205 columns and 1752 nonzeros Presolve time: 0.00s Presolved: 565 rows, 205 columns, 1752 nonzeros Variable types: 0 continuous, 205 integer (205 binary) Root relaxation: objective 0.000000e+00, 38 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 12 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (144 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 17:55:58 2012 Optimize a model with 474 rows, 186 columns and 1460 nonzeros Presolve time: 0.00s Presolved: 474 rows, 186 columns, 1460 nonzeros Variable types: 0 continuous, 186 integer (186 binary) Root relaxation: objective 0.000000e+00, 38 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 38 - 0.00000 - - 0s 0 0 0.00000 0 19 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (399 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: 6