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 39 rows and 1521 columns Presolve time: 0.01s Presolved: 1249 rows, 1591 columns, 5187 nonzeros Variable types: 0 continuous, 1591 integer (1591 binary) Root relaxation: objective 0.000000e+00, 67 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 (67 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 -- 39 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:14:10 2012 Optimize a model with 668 rows, 1532 columns and 3268 nonzeros Presolve removed 39 rows and 741 columns Presolve time: 0.00s Presolved: 629 rows, 791 columns, 2527 nonzeros Variable types: 0 continuous, 791 integer (791 binary) Root relaxation: objective 0.000000e+00, 67 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 (67 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 16:14:10 2012 Optimize a model with 358 rows, 742 columns and 1548 nonzeros Presolve removed 39 rows and 351 columns Presolve time: 0.00s Presolved: 319 rows, 391 columns, 1197 nonzeros Variable types: 0 continuous, 391 integer (391 binary) Root relaxation: objective 0.000000e+00, 64 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 (64 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 16:14:10 2012 Optimize a model with 203 rows, 347 columns and 688 nonzeros Presolve removed 39 rows and 156 columns Presolve time: 0.00s Presolved: 164 rows, 191 columns, 532 nonzeros Variable types: 0 continuous, 191 integer (191 binary) Root relaxation: objective 0.000000e+00, 56 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 (56 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 16:14:10 2012 Optimize a model with 141 rows, 189 columns and 344 nonzeros Presolve removed 85 rows and 127 columns Presolve time: 0.00s Presolved: 56 rows, 62 columns, 168 nonzeros Variable types: 0 continuous, 62 integer (62 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 16:14:10 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