current bounds on the number of colors: 0 -- 101 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:24:52 2012 Optimize a model with 13001 rows, 5308 columns and 43750 nonzeros Presolve time: 0.09s Presolved: 13001 rows, 5308 columns, 43750 nonzeros Variable types: 0 continuous, 5308 integer (5308 binary) Root relaxation: objective 0.000000e+00, 269 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 (446 simplex iterations) in 0.12 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 -- 50 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:24:52 2012 Optimize a model with 6551 rows, 2783 columns and 21875 nonzeros Presolve time: 0.03s Presolved: 6551 rows, 2783 columns, 21875 nonzeros Variable types: 0 continuous, 2783 integer (2783 binary) Root relaxation: objective 0.000000e+00, 248 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 0.04 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 -- 25 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:24:52 2012 Optimize a model with 3197 rows, 1470 columns and 10500 nonzeros Presolve time: 0.01s Presolved: 3197 rows, 1470 columns, 10500 nonzeros Variable types: 0 continuous, 1470 integer (1470 binary) Root relaxation: objective 0.000000e+00, 212 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 (365 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 -- 12 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:24:52 2012 Optimize a model with 1649 rows, 864 columns and 5250 nonzeros Presolve time: 0.00s Presolved: 1649 rows, 864 columns, 5250 nonzeros Variable types: 0 continuous, 864 integer (864 binary) Root relaxation: objective 0.000000e+00, 243 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 (437 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 -- 6 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:24:52 2012 Optimize a model with 875 rows, 561 columns and 2625 nonzeros Presolve time: 0.00s Presolved: 875 rows, 561 columns, 2625 nonzeros Variable types: 0 continuous, 561 integer (561 binary) Root relaxation: objective 0.000000e+00, 252 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 0 188 - 0.00000 - - 0s 0 0 0.00000 0 194 - 0.00000 - - 0s 0 0 0.00000 0 180 - 0.00000 - - 0s 0 0 0.00000 0 180 - 0.00000 - - 0s 0 0 0.00000 0 174 - 0.00000 - - 0s 0 0 0.00000 0 208 - 0.00000 - - 0s 0 0 0.00000 0 212 - 0.00000 - - 0s 0 0 0.00000 0 177 - 0.00000 - - 0s 0 0 0.00000 0 197 - 0.00000 - - 0s 0 0 0.00000 0 197 - 0.00000 - - 0s 0 2 0.00000 0 197 - 0.00000 - - 0s Cutting planes: Zero half: 8 Explored 13 nodes (8608 simplex iterations) in 0.43 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound -, gap - current bounds on the number of colors: 3 -- 6 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:24:53 2012 Optimize a model with 1133 rows, 662 columns and 3500 nonzeros Presolve time: 0.00s Presolved: 1133 rows, 662 columns, 3500 nonzeros Variable types: 0 continuous, 662 integer (662 binary) Root relaxation: objective 0.000000e+00, 247 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 (456 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: 4