current bounds on the number of colors: 0 -- 63 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:13:40 2012 Optimize a model with 683 rows, 1973 columns and 3813 nonzeros Presolve removed 32 rows and 992 columns Presolve time: 0.01s Presolved: 651 rows, 981 columns, 2821 nonzeros Variable types: 0 continuous, 981 integer (981 binary) Root relaxation: objective 0.000000e+00, 49 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 (49 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 -- 31 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:13:40 2012 Optimize a model with 363 rows, 965 columns and 1845 nonzeros Presolve removed 32 rows and 480 columns Presolve time: 0.00s Presolved: 331 rows, 485 columns, 1365 nonzeros Variable types: 0 continuous, 485 integer (485 binary) Root relaxation: objective 0.000000e+00, 49 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 (49 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 -- 15 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:13:40 2012 Optimize a model with 203 rows, 461 columns and 861 nonzeros Presolve removed 32 rows and 224 columns Presolve time: 0.00s Presolved: 171 rows, 237 columns, 637 nonzeros Variable types: 0 continuous, 237 integer (237 binary) Root relaxation: objective 0.000000e+00, 46 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 (46 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 -- 7 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:13:40 2012 Optimize a model with 123 rows, 209 columns and 369 nonzeros Presolve removed 32 rows and 96 columns Presolve time: 0.00s Presolved: 91 rows, 113 columns, 273 nonzeros Variable types: 0 continuous, 113 integer (113 binary) Root relaxation: objective 0.000000e+00, 42 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 (42 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 -- 3 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:13:40 2012 Optimize a model with 83 rows, 83 columns and 123 nonzeros Presolve removed 83 rows and 83 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 - current bounds on the number of colors: 1 -- 3 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:13:40 2012 Optimize a model with 103 rows, 146 columns and 246 nonzeros Presolve removed 81 rows and 122 columns Presolve time: 0.00s Presolved: 22 rows, 24 columns, 66 nonzeros Variable types: 0 continuous, 24 integer (24 binary) Root relaxation: objective 0.000000e+00, 9 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 (9 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: 2