current bounds on the number of colors: 0 -- 79 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:14:10 2012 Optimize a model with 1288 rows, 3112 columns and 6708 nonzeros Presolve removed 35 rows and 1365 columns Presolve time: 0.01s Presolved: 1253 rows, 1747 columns, 5343 nonzeros Variable types: 0 continuous, 1747 integer (1747 binary) Root relaxation: objective 0.000000e+00, 72 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 (72 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 -- 39 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:14:11 2012 Optimize a model with 668 rows, 1532 columns and 3268 nonzeros Presolve removed 35 rows and 665 columns Presolve time: 0.00s Presolved: 633 rows, 867 columns, 2603 nonzeros Variable types: 0 continuous, 867 integer (867 binary) Root relaxation: objective 0.000000e+00, 72 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 (72 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 -- 19 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:14:11 2012 Optimize a model with 358 rows, 742 columns and 1548 nonzeros Presolve removed 35 rows and 315 columns Presolve time: 0.00s Presolved: 323 rows, 427 columns, 1233 nonzeros Variable types: 0 continuous, 427 integer (427 binary) Root relaxation: objective 0.000000e+00, 69 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 (69 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 -- 9 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:14:11 2012 Optimize a model with 203 rows, 347 columns and 688 nonzeros Presolve removed 35 rows and 140 columns Presolve time: 0.00s Presolved: 168 rows, 207 columns, 548 nonzeros Variable types: 0 continuous, 207 integer (207 binary) Root relaxation: objective 0.000000e+00, 60 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 (60 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 -- 4 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:14:11 2012 Optimize a model with 141 rows, 189 columns and 344 nonzeros Presolve removed 91 rows and 132 columns Presolve time: 0.00s Presolved: 50 rows, 57 columns, 150 nonzeros Variable types: 0 continuous, 57 integer (57 binary) Root relaxation: objective 0.000000e+00, 21 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 (21 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 16:14:11 2012 Optimize a model with 110 rows, 110 columns and 172 nonzeros Presolve removed 110 rows and 110 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