current bounds on the number of colors: 0 -- 43 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:19:41 2012 Optimize a model with 1009 rows, 949 columns and 3801 nonzeros Presolve removed 2 rows and 42 columns Presolve time: 0.01s Presolved: 1007 rows, 907 columns, 3759 nonzeros Variable types: 0 continuous, 907 integer (907 binary) Root relaxation: objective 0.000000e+00, 70 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 (70 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 Fri Dec 14 18:19:41 2012 Optimize a model with 503 rows, 476 columns and 1810 nonzeros Presolve removed 2 rows and 20 columns Presolve time: 0.00s Presolved: 501 rows, 456 columns, 1790 nonzeros Variable types: 0 continuous, 456 integer (456 binary) Root relaxation: objective 0.000000e+00, 68 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 (68 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 Fri Dec 14 18:19:41 2012 Optimize a model with 273 rows, 261 columns and 905 nonzeros Presolve removed 2 rows and 10 columns Presolve time: 0.00s Presolved: 271 rows, 251 columns, 895 nonzeros Variable types: 0 continuous, 251 integer (251 binary) Root relaxation: objective 0.000000e+00, 75 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 (75 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 Fri Dec 14 18:19:41 2012 Optimize a model with 135 rows, 132 columns and 362 nonzeros Presolve removed 43 rows and 45 columns Presolve time: 0.00s Presolved: 92 rows, 87 columns, 276 nonzeros Variable types: 0 continuous, 87 integer (87 binary) Root relaxation: objective 0.000000e+00, 44 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 41 - 0.00000 - - 0s Explored 0 nodes (136 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 18:19:41 2012 Optimize a model with 181 rows, 175 columns and 543 nonzeros Presolve removed 2 rows and 6 columns Presolve time: 0.00s Presolved: 179 rows, 169 columns, 537 nonzeros Variable types: 0 continuous, 169 integer (169 binary) Root relaxation: objective 0.000000e+00, 66 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 (66 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: 3