current bounds on the number of colors: 0 -- 63 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:20:22 2012 Optimize a model with 2729 rows, 2039 columns and 9951 nonzeros Presolve removed 5 rows and 155 columns Presolve time: 0.02s Presolved: 2724 rows, 1884 columns, 9796 nonzeros Variable types: 0 continuous, 1884 integer (1884 binary) Root relaxation: objective 0.000000e+00, 123 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 (123 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 -- 31 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:20:22 2012 Optimize a model with 1353 rows, 1031 columns and 4815 nonzeros Presolve removed 5 rows and 75 columns Presolve time: 0.01s Presolved: 1348 rows, 956 columns, 4740 nonzeros Variable types: 0 continuous, 956 integer (956 binary) Root relaxation: objective 0.000000e+00, 122 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 (206 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 -- 15 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:20:22 2012 Optimize a model with 665 rows, 527 columns and 2247 nonzeros Presolve removed 5 rows and 35 columns Presolve time: 0.00s Presolved: 660 rows, 492 columns, 2212 nonzeros Variable types: 0 continuous, 492 integer (492 binary) Root relaxation: objective 0.000000e+00, 118 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 (118 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 Fri Dec 14 18:20:22 2012 Optimize a model with 321 rows, 275 columns and 963 nonzeros Presolve removed 5 rows and 15 columns Presolve time: 0.00s Presolved: 316 rows, 260 columns, 948 nonzeros Variable types: 0 continuous, 260 integer (260 binary) Root relaxation: objective 0.000000e+00, 123 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 (183 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 18:20:22 2012 Optimize a model with 149 rows, 149 columns and 321 nonzeros Presolve removed 149 rows and 149 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 18:20:22 2012 Optimize a model with 235 rows, 212 columns and 642 nonzeros Presolve removed 63 rows and 68 columns Presolve time: 0.00s Presolved: 172 rows, 144 columns, 516 nonzeros Variable types: 0 continuous, 144 integer (144 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 0.00000 0 58 - 0.00000 - - 0s Explored 0 nodes (207 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