current bounds on the number of colors: 0 -- 69 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:13:51 2012 Optimize a model with 885 rows, 2370 columns and 4794 nonzeros Presolve removed 33 rows and 1122 columns Presolve time: 0.01s Presolved: 852 rows, 1248 columns, 3672 nonzeros Variable types: 0 continuous, 1248 integer (1248 binary) Root relaxation: objective 0.000000e+00, 58 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 (58 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 -- 34 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:13:51 2012 Optimize a model with 477 rows, 1197 columns and 2397 nonzeros Presolve removed 33 rows and 561 columns Presolve time: 0.00s Presolved: 444 rows, 636 columns, 1836 nonzeros Variable types: 0 continuous, 636 integer (636 binary) Root relaxation: objective 0.000000e+00, 58 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 (58 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 -- 17 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:13:51 2012 Optimize a model with 261 rows, 576 columns and 1128 nonzeros Presolve removed 33 rows and 264 columns Presolve time: 0.00s Presolved: 228 rows, 312 columns, 864 nonzeros Variable types: 0 continuous, 312 integer (312 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 -- 8 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:13:51 2012 Optimize a model with 165 rows, 300 columns and 564 nonzeros Presolve removed 33 rows and 132 columns Presolve time: 0.00s Presolved: 132 rows, 168 columns, 432 nonzeros Variable types: 0 continuous, 168 integer (168 binary) Root relaxation: objective 0.000000e+00, 51 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 (51 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 16:13:51 2012 Optimize a model with 117 rows, 162 columns and 282 nonzeros Presolve removed 81 rows and 120 columns Presolve time: 0.00s Presolved: 36 rows, 42 columns, 108 nonzeros Variable types: 0 continuous, 42 integer (42 binary) Root relaxation: objective 0.000000e+00, 16 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 (16 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 16:13:51 2012 Optimize a model with 93 rows, 93 columns and 141 nonzeros Presolve removed 93 rows and 93 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