current bounds on the number of colors: 0 -- 144 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:19:08 2012 Optimize a model with 7776 rows, 10474 columns and 33264 nonzeros Presolve removed 30 rows and 2160 columns Presolve time: 0.10s Presolved: 7746 rows, 8314 columns, 31104 nonzeros Variable types: 0 continuous, 8314 integer (8314 binary) Root relaxation: objective 0.000000e+00, 195 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 (283 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 -- 72 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:19:09 2012 Optimize a model with 3960 rows, 5290 columns and 16632 nonzeros Presolve removed 30 rows and 1080 columns Presolve time: 0.03s Presolved: 3930 rows, 4210 columns, 15552 nonzeros Variable types: 0 continuous, 4210 integer (4210 binary) Root relaxation: objective 0.000000e+00, 195 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 (369 simplex iterations) in 0.04 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 -- 36 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:19:09 2012 Optimize a model with 2052 rows, 2698 columns and 8316 nonzeros Presolve removed 30 rows and 540 columns Presolve time: 0.01s Presolved: 2022 rows, 2158 columns, 7776 nonzeros Variable types: 0 continuous, 2158 integer (2158 binary) Root relaxation: objective 0.000000e+00, 196 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 (279 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 -- 18 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:19:09 2012 Optimize a model with 1098 rows, 1402 columns and 4158 nonzeros Presolve removed 30 rows and 270 columns Presolve time: 0.00s Presolved: 1068 rows, 1132 columns, 3888 nonzeros Variable types: 0 continuous, 1132 integer (1132 binary) Root relaxation: objective 0.000000e+00, 191 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 (191 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 -- 9 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:19:09 2012 Optimize a model with 568 rows, 682 columns and 1848 nonzeros Presolve removed 30 rows and 120 columns Presolve time: 0.00s Presolved: 538 rows, 562 columns, 1728 nonzeros Variable types: 0 continuous, 562 integer (562 binary) Root relaxation: objective 0.000000e+00, 172 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 (230 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 16:19:09 2012 Optimize a model with 356 rows, 394 columns and 924 nonzeros Presolve removed 154 rows and 189 columns Presolve time: 0.00s Presolved: 202 rows, 205 columns, 606 nonzeros Variable types: 0 continuous, 205 integer (205 binary) Root relaxation: objective 0.000000e+00, 104 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 74 - 0.00000 - - 0s Explored 0 nodes (313 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 -- 4 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:19:09 2012 Optimize a model with 462 rows, 538 columns and 1386 nonzeros Presolve removed 30 rows and 90 columns Presolve time: 0.00s Presolved: 432 rows, 448 columns, 1296 nonzeros Variable types: 0 continuous, 448 integer (448 binary) Root relaxation: objective 0.000000e+00, 182 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 (240 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