current bounds on the number of colors: 0 -- 25 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:19:23 2012 Optimize a model with 229 rows, 317 columns and 912 nonzeros Presolve removed 5 rows and 60 columns Presolve time: 0.00s Presolved: 224 rows, 257 columns, 852 nonzeros Variable types: 0 continuous, 257 integer (257 binary) Root relaxation: objective 0.000000e+00, 32 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 (32 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 -- 12 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:19:23 2012 Optimize a model with 127 rows, 167 columns and 456 nonzeros Presolve removed 5 rows and 30 columns Presolve time: 0.00s Presolved: 122 rows, 137 columns, 426 nonzeros Variable types: 0 continuous, 137 integer (137 binary) Root relaxation: objective 0.000000e+00, 34 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 (34 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 -- 6 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:19:23 2012 Optimize a model with 76 rows, 92 columns and 228 nonzeros Presolve removed 5 rows and 15 columns Presolve time: 0.00s Presolved: 71 rows, 77 columns, 213 nonzeros Variable types: 0 continuous, 77 integer (77 binary) Root relaxation: objective 0.000000e+00, 34 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 (34 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 Fri Dec 14 18:19:23 2012 Optimize a model with 42 rows, 42 columns and 76 nonzeros Presolve removed 42 rows and 42 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 Fri Dec 14 18:19:23 2012 Optimize a model with 59 rows, 67 columns and 152 nonzeros Presolve removed 29 rows and 36 columns Presolve time: 0.00s Presolved: 30 rows, 31 columns, 90 nonzeros Variable types: 0 continuous, 31 integer (31 binary) Root relaxation: objective 0.000000e+00, 17 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 12 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (46 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 - optimal solution found: number of colors: 3