current bounds on the number of colors: 0 -- 41 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:35:57 2012 Optimize a model with 1881 rows, 912 columns and 6340 nonzeros Presolve removed 1 rows and 20 columns Presolve time: 0.01s Presolved: 1880 rows, 892 columns, 6320 nonzeros Variable types: 0 continuous, 892 integer (892 binary) Root relaxation: objective 0.000000e+00, 90 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 (157 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 -- 20 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:35:57 2012 Optimize a model with 961 rows, 502 columns and 3170 nonzeros Presolve removed 1 rows and 10 columns Presolve time: 0.00s Presolved: 960 rows, 492 columns, 3160 nonzeros Variable types: 0 continuous, 492 integer (492 binary) Root relaxation: objective 0.000000e+00, 84 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 (144 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 -- 10 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:35:57 2012 Optimize a model with 501 rows, 297 columns and 1585 nonzeros Presolve removed 1 rows and 5 columns Presolve time: 0.00s Presolved: 500 rows, 292 columns, 1580 nonzeros Variable types: 0 continuous, 292 integer (292 binary) Root relaxation: objective 0.000000e+00, 94 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 (156 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 -- 5 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:35:57 2012 Optimize a model with 225 rows, 174 columns and 634 nonzeros Presolve removed 41 rows and 42 columns Presolve time: 0.00s Presolved: 184 rows, 132 columns, 552 nonzeros Variable types: 0 continuous, 132 integer (132 binary) Root relaxation: objective 0.000000e+00, 41 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 40 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (163 simplex iterations) in 0.00 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: 2 -- 5 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:35:57 2012 Optimize a model with 317 rows, 215 columns and 951 nonzeros Presolve removed 1 rows and 3 columns Presolve time: 0.00s Presolved: 316 rows, 212 columns, 948 nonzeros Variable types: 0 continuous, 212 integer (212 binary) Root relaxation: objective 0.000000e+00, 108 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 (202 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: 3