current bounds on the number of colors: 0 -- 75 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:21:06 2012 Optimize a model with 4589 rows, 2897 columns and 16317 nonzeros Presolve removed 1 rows and 37 columns Presolve time: 0.03s Presolved: 4588 rows, 2860 columns, 16280 nonzeros Variable types: 0 continuous, 2860 integer (2860 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 (160 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 -- 37 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:21:06 2012 Optimize a model with 2271 rows, 1472 columns and 7938 nonzeros Presolve removed 1 rows and 18 columns Presolve time: 0.01s Presolved: 2270 rows, 1454 columns, 7920 nonzeros Variable types: 0 continuous, 1454 integer (1454 binary) Root relaxation: objective 0.000000e+00, 157 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 (247 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 -- 18 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:21:06 2012 Optimize a model with 1173 rows, 797 columns and 3969 nonzeros Presolve removed 1 rows and 9 columns Presolve time: 0.00s Presolved: 1172 rows, 788 columns, 3960 nonzeros Variable types: 0 continuous, 788 integer (788 binary) Root relaxation: objective 0.000000e+00, 158 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 (249 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 Fri Dec 14 18:21:06 2012 Optimize a model with 563 rows, 422 columns and 1764 nonzeros Presolve removed 1 rows and 4 columns Presolve time: 0.00s Presolved: 562 rows, 418 columns, 1760 nonzeros Variable types: 0 continuous, 418 integer (418 binary) Root relaxation: objective 0.000000e+00, 147 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 (147 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 18:21:06 2012 Optimize a model with 319 rows, 272 columns and 882 nonzeros Presolve removed 75 rows and 76 columns Presolve time: 0.00s Presolved: 244 rows, 196 columns, 732 nonzeros Variable types: 0 continuous, 196 integer (196 binary) Root relaxation: objective 0.000000e+00, 79 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 74 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (302 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 18:21:06 2012 Optimize a model with 441 rows, 347 columns and 1323 nonzeros Presolve removed 1 rows and 3 columns Presolve time: 0.00s Presolved: 440 rows, 344 columns, 1320 nonzeros Variable types: 0 continuous, 344 integer (344 binary) Root relaxation: objective 0.000000e+00, 167 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 (167 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