current bounds on the number of colors: 0 -- 170 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:23:09 2012 Optimize a model with 13940 rows, 14612 columns and 55760 nonzeros Presolve removed 26 rows and 2210 columns Presolve time: 0.11s Presolved: 13914 rows, 12402 columns, 53550 nonzeros Variable types: 0 continuous, 12402 integer (12402 binary) Root relaxation: objective 0.000000e+00, 260 iterations, 0.01 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 (260 simplex iterations) in 0.12 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 -- 85 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:23:09 2012 Optimize a model with 6974 rows, 7302 columns and 27552 nonzeros Presolve removed 26 rows and 1092 columns Presolve time: 0.06s Presolved: 6948 rows, 6210 columns, 26460 nonzeros Variable types: 0 continuous, 6210 integer (6210 binary) Root relaxation: objective 0.000000e+00, 256 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 (256 simplex iterations) in 0.07 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 -- 42 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:23:10 2012 Optimize a model with 3572 rows, 3732 columns and 13776 nonzeros Presolve removed 26 rows and 546 columns Presolve time: 0.02s Presolved: 3546 rows, 3186 columns, 13230 nonzeros Variable types: 0 continuous, 3186 integer (3186 binary) Root relaxation: objective 0.000000e+00, 257 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 (257 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 -- 21 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:23:10 2012 Optimize a model with 1790 rows, 1862 columns and 6560 nonzeros Presolve removed 26 rows and 260 columns Presolve time: 0.01s Presolved: 1764 rows, 1602 columns, 6300 nonzeros Variable types: 0 continuous, 1602 integer (1602 binary) Root relaxation: objective 0.000000e+00, 249 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 (249 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 -- 10 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:23:10 2012 Optimize a model with 980 rows, 1012 columns and 3280 nonzeros Presolve removed 26 rows and 130 columns Presolve time: 0.00s Presolved: 954 rows, 882 columns, 3150 nonzeros Variable types: 0 continuous, 882 integer (882 binary) Root relaxation: objective 0.000000e+00, 237 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 (237 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 16:23:10 2012 Optimize a model with 494 rows, 502 columns and 1312 nonzeros Presolve removed 178 rows and 208 columns Presolve time: 0.00s Presolved: 316 rows, 294 columns, 948 nonzeros Variable types: 0 continuous, 294 integer (294 binary) Root relaxation: objective 0.000000e+00, 156 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 0 132 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (481 simplex iterations) in 0.01 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 16:23:10 2012 Optimize a model with 656 rows, 672 columns and 1968 nonzeros Presolve removed 26 rows and 78 columns Presolve time: 0.00s Presolved: 630 rows, 594 columns, 1890 nonzeros Variable types: 0 continuous, 594 integer (594 binary) Root relaxation: objective 0.000000e+00, 246 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 (336 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