current bounds on the number of colors: 0 -- 83 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:14:19 2012 Optimize a model with 1395 rows, 3435 columns and 7339 nonzeros Presolve removed 38 rows and 1558 columns Presolve time: 0.02s Presolved: 1357 rows, 1877 columns, 5781 nonzeros Variable types: 0 continuous, 1877 integer (1877 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 -- 41 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:14:19 2012 Optimize a model with 723 rows, 1692 columns and 3580 nonzeros Presolve removed 38 rows and 760 columns Presolve time: 0.01s Presolved: 685 rows, 932 columns, 2820 nonzeros Variable types: 0 continuous, 932 integer (932 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 -- 20 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:14:19 2012 Optimize a model with 403 rows, 862 columns and 1790 nonzeros Presolve removed 38 rows and 380 columns Presolve time: 0.00s Presolved: 365 rows, 482 columns, 1410 nonzeros Variable types: 0 continuous, 482 integer (482 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 (106 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 Sat Dec 15 16:14:19 2012 Optimize a model with 243 rows, 447 columns and 895 nonzeros Presolve removed 38 rows and 190 columns Presolve time: 0.00s Presolved: 205 rows, 257 columns, 705 nonzeros Variable types: 0 continuous, 257 integer (257 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 -- 5 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:14:19 2012 Optimize a model with 147 rows, 198 columns and 358 nonzeros Presolve removed 97 rows and 142 columns Presolve time: 0.00s Presolved: 50 rows, 56 columns, 150 nonzeros Variable types: 0 continuous, 56 integer (56 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 0.00000 0 6 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (64 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 Sat Dec 15 16:14:19 2012 Optimize a model with 179 rows, 281 columns and 537 nonzeros Presolve removed 38 rows and 114 columns Presolve time: 0.00s Presolved: 141 rows, 167 columns, 423 nonzeros Variable types: 0 continuous, 167 integer (167 binary) Root relaxation: objective 0.000000e+00, 59 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 (59 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