current bounds on the number of colors: 0 -- 84 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:14:21 2012 Optimize a model with 1764 rows, 3568 columns and 8568 nonzeros Presolve removed 32 rows and 1344 columns Presolve time: 0.02s Presolved: 1732 rows, 2224 columns, 7224 nonzeros Variable types: 0 continuous, 2224 integer (2224 binary) Root relaxation: objective 0.000000e+00, 85 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 (85 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 -- 42 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:14:21 2012 Optimize a model with 924 rows, 1804 columns and 4284 nonzeros Presolve removed 32 rows and 672 columns Presolve time: 0.01s Presolved: 892 rows, 1132 columns, 3612 nonzeros Variable types: 0 continuous, 1132 integer (1132 binary) Root relaxation: objective 0.000000e+00, 85 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 (85 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 -- 21 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:14:21 2012 Optimize a model with 484 rows, 880 columns and 2040 nonzeros Presolve removed 32 rows and 320 columns Presolve time: 0.00s Presolved: 452 rows, 560 columns, 1720 nonzeros Variable types: 0 continuous, 560 integer (560 binary) Root relaxation: objective 0.000000e+00, 83 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 (83 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 -- 10 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:14:21 2012 Optimize a model with 284 rows, 460 columns and 1020 nonzeros Presolve removed 32 rows and 160 columns Presolve time: 0.00s Presolved: 252 rows, 300 columns, 860 nonzeros Variable types: 0 continuous, 300 integer (300 binary) Root relaxation: objective 0.000000e+00, 78 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 (78 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 -- 5 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:14:21 2012 Optimize a model with 164 rows, 208 columns and 408 nonzeros Presolve removed 86 rows and 119 columns Presolve time: 0.00s Presolved: 78 rows, 89 columns, 234 nonzeros Variable types: 0 continuous, 89 integer (89 binary) Root relaxation: objective 0.000000e+00, 29 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 (29 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 -- 2 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:14:21 2012 Optimize a model with 124 rows, 124 columns and 204 nonzeros Presolve removed 124 rows and 124 columns Presolve time: 0.00s Explored 0 nodes (0 simplex iterations) in 0.00 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound -, gap - optimal solution found: number of colors: 2