current bounds on the number of colors: 0 -- 68 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:20:36 2012 Optimize a model with 4930 rows, 2455 columns and 16898 nonzeros Presolve removed 1 rows and 34 columns Presolve time: 0.03s Presolved: 4929 rows, 2421 columns, 16864 nonzeros Variable types: 0 continuous, 2421 integer (2421 binary) Root relaxation: objective 0.000000e+00, 160 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 (258 simplex iterations) in 0.04 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 -- 34 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:20:37 2012 Optimize a model with 2499 rows, 1299 columns and 8449 nonzeros Presolve removed 1 rows and 17 columns Presolve time: 0.01s Presolved: 2498 rows, 1282 columns, 8432 nonzeros Variable types: 0 continuous, 1282 integer (1282 binary) Root relaxation: objective 0.000000e+00, 143 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 (238 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 -- 17 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:20:37 2012 Optimize a model with 1212 rows, 687 columns and 3976 nonzeros Presolve removed 1 rows and 8 columns Presolve time: 0.00s Presolved: 1211 rows, 679 columns, 3968 nonzeros Variable types: 0 continuous, 679 integer (679 binary) Root relaxation: objective 0.000000e+00, 155 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 (261 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 Fri Dec 14 18:20:37 2012 Optimize a model with 640 rows, 415 columns and 1988 nonzeros Presolve removed 1 rows and 4 columns Presolve time: 0.00s Presolved: 639 rows, 411 columns, 1984 nonzeros Variable types: 0 continuous, 411 integer (411 binary) Root relaxation: objective 0.000000e+00, 156 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 (246 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 -- 4 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:20:37 2012 Optimize a model with 354 rows, 279 columns and 994 nonzeros Presolve removed 68 rows and 69 columns Presolve time: 0.00s Presolved: 286 rows, 210 columns, 858 nonzeros Variable types: 0 continuous, 210 integer (210 binary) Root relaxation: objective 0.000000e+00, 67 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 67 - 0.00000 - - 0s Explored 0 nodes (255 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 -- 4 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:20:37 2012 Optimize a model with 497 rows, 347 columns and 1491 nonzeros Presolve removed 1 rows and 3 columns Presolve time: 0.00s Presolved: 496 rows, 344 columns, 1488 nonzeros Variable types: 0 continuous, 344 integer (344 binary) Root relaxation: objective 0.000000e+00, 171 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 0 118 - 0.00000 - - 0s 0 0 0.00000 0 114 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (1017 simplex iterations) in 0.03 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