current bounds on the number of colors: 0 -- 85 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:22:04 2012 Optimize a model with 7645 rows, 3750 columns and 26250 nonzeros Presolve removed 1 rows and 42 columns Presolve time: 0.05s Presolved: 7644 rows, 3708 columns, 26208 nonzeros Variable types: 0 continuous, 3708 integer (3708 binary) Root relaxation: objective 0.000000e+00, 179 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 (179 simplex iterations) in 0.06 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 -- 42 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:22:04 2012 Optimize a model with 3865 rows, 1965 columns and 13125 nonzeros Presolve removed 1 rows and 21 columns Presolve time: 0.02s Presolved: 3864 rows, 1944 columns, 13104 nonzeros Variable types: 0 continuous, 1944 integer (1944 binary) Root relaxation: objective 0.000000e+00, 195 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 (310 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 -- 21 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:22:05 2012 Optimize a model with 1885 rows, 1030 columns and 6250 nonzeros Presolve removed 1 rows and 10 columns Presolve time: 0.01s Presolved: 1884 rows, 1020 columns, 6240 nonzeros Variable types: 0 continuous, 1020 integer (1020 binary) Root relaxation: objective 0.000000e+00, 191 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 (316 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 Fri Dec 14 18:22:05 2012 Optimize a model with 985 rows, 605 columns and 3125 nonzeros Presolve removed 1 rows and 5 columns Presolve time: 0.00s Presolved: 984 rows, 600 columns, 3120 nonzeros Variable types: 0 continuous, 600 integer (600 binary) Root relaxation: objective 0.000000e+00, 205 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 (416 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 -- 5 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:22:05 2012 Optimize a model with 445 rows, 350 columns and 1250 nonzeros Presolve removed 85 rows and 86 columns Presolve time: 0.00s Presolved: 360 rows, 264 columns, 1080 nonzeros Variable types: 0 continuous, 264 integer (264 binary) Root relaxation: objective 0.000000e+00, 92 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 84 - 0.00000 - - 0s Explored 0 nodes (321 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 Fri Dec 14 18:22:05 2012 Optimize a model with 625 rows, 435 columns and 1875 nonzeros Presolve removed 1 rows and 3 columns Presolve time: 0.00s Presolved: 624 rows, 432 columns, 1872 nonzeros Variable types: 0 continuous, 432 integer (432 binary) Root relaxation: objective 0.000000e+00, 196 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 0 140 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (559 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% optimal solution found: number of colors: 3