current bounds on the number of colors: 0 -- 84 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:21:59 2012 Optimize a model with 7182 rows, 3697 columns and 24822 nonzeros Presolve removed 3 rows and 126 columns Presolve time: 0.05s Presolved: 7179 rows, 3571 columns, 24696 nonzeros Variable types: 0 continuous, 3571 integer (3571 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 (310 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 18:21:59 2012 Optimize a model with 3633 rows, 1933 columns and 12411 nonzeros Presolve removed 3 rows and 63 columns Presolve time: 0.02s Presolved: 3630 rows, 1870 columns, 12348 nonzeros Variable types: 0 continuous, 1870 integer (1870 binary) Root relaxation: objective 0.000000e+00, 203 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 (203 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 -- 21 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:21:59 2012 Optimize a model with 1774 rows, 1009 columns and 5910 nonzeros Presolve removed 3 rows and 30 columns Presolve time: 0.01s Presolved: 1771 rows, 979 columns, 5880 nonzeros Variable types: 0 continuous, 979 integer (979 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 (290 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 18:21:59 2012 Optimize a model with 929 rows, 589 columns and 2955 nonzeros Presolve removed 3 rows and 15 columns Presolve time: 0.00s Presolved: 926 rows, 574 columns, 2940 nonzeros Variable types: 0 continuous, 574 integer (574 binary) Root relaxation: objective 0.000000e+00, 200 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 (299 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 18:21:59 2012 Optimize a model with 422 rows, 337 columns and 1182 nonzeros Presolve removed 84 rows and 87 columns Presolve time: 0.00s Presolved: 338 rows, 250 columns, 1014 nonzeros Variable types: 0 continuous, 250 integer (250 binary) Root relaxation: objective 0.000000e+00, 87 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 81 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (334 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 18:21:59 2012 Optimize a model with 591 rows, 421 columns and 1773 nonzeros Presolve removed 3 rows and 9 columns Presolve time: 0.00s Presolved: 588 rows, 412 columns, 1764 nonzeros Variable types: 0 continuous, 412 integer (412 binary) Root relaxation: objective 0.000000e+00, 197 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 0 126 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (729 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