current bounds on the number of colors: 0 -- 71 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:38:14 2012 Optimize a model with 9766 rows, 2762 columns and 31570 nonzeros Presolve time: 0.05s Presolved: 9766 rows, 2762 columns, 31570 nonzeros Variable types: 0 continuous, 2762 integer (2762 binary) Root relaxation: objective 0.000000e+00, 195 iterations, 0.01 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 (329 simplex iterations) in 0.07 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 -- 35 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:38:14 2012 Optimize a model with 4780 rows, 1484 columns and 15334 nonzeros Presolve time: 0.02s Presolved: 4780 rows, 1484 columns, 15334 nonzeros Variable types: 0 continuous, 1484 integer (1484 binary) Root relaxation: objective 0.000000e+00, 145 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 (265 simplex iterations) in 0.03 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 -- 17 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:38:14 2012 Optimize a model with 2287 rows, 845 columns and 7216 nonzeros Presolve time: 0.01s Presolved: 2287 rows, 845 columns, 7216 nonzeros Variable types: 0 continuous, 845 integer (845 binary) Root relaxation: objective 0.000000e+00, 149 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 (295 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 -- 8 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:38:14 2012 Optimize a model with 1179 rows, 561 columns and 3608 nonzeros Presolve time: 0.00s Presolved: 1179 rows, 561 columns, 3608 nonzeros Variable types: 0 continuous, 561 integer (561 binary) Root relaxation: objective 0.000000e+00, 152 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 0 122 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (825 simplex iterations) in 0.02 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 -- 4 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:38:14 2012 Optimize a model with 625 rows, 419 columns and 1804 nonzeros Presolve removed 71 rows and 71 columns Presolve time: 0.00s Presolved: 554 rows, 348 columns, 1662 nonzeros Variable types: 0 continuous, 348 integer (348 binary) Root relaxation: objective 0.000000e+00, 75 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 71 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (295 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: 2 -- 4 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:38:14 2012 Optimize a model with 902 rows, 490 columns and 2706 nonzeros Presolve time: 0.00s Presolved: 902 rows, 490 columns, 2706 nonzeros Variable types: 0 continuous, 490 integer (490 binary) Root relaxation: objective 0.000000e+00, 165 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 0 142 - 0.00000 - - 0s 0 0 0.00000 0 136 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (1724 simplex iterations) in 0.09 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: 4