current bounds on the number of colors: 0 -- 110 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:26:57 2012 Optimize a model with 17160 rows, 6360 columns and 57200 nonzeros Presolve removed 1 rows and 55 columns Presolve time: 0.12s Presolved: 17159 rows, 6305 columns, 57145 nonzeros Variable types: 0 continuous, 6305 integer (6305 binary) Root relaxation: objective 0.000000e+00, 356 iterations, 0.02 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 (562 simplex iterations) in 0.16 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 -- 55 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:26:57 2012 Optimize a model with 8480 rows, 3280 columns and 28080 nonzeros Presolve removed 1 rows and 27 columns Presolve time: 0.04s Presolved: 8479 rows, 3253 columns, 28053 nonzeros Variable types: 0 continuous, 3253 integer (3253 binary) Root relaxation: objective 0.000000e+00, 255 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 (431 simplex iterations) in 0.06 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 -- 27 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:26:58 2012 Optimize a model with 4140 rows, 1740 columns and 13520 nonzeros Presolve removed 1 rows and 13 columns Presolve time: 0.01s Presolved: 4139 rows, 1727 columns, 13507 nonzeros Variable types: 0 continuous, 1727 integer (1727 binary) Root relaxation: objective 0.000000e+00, 226 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 (482 simplex iterations) in 0.03 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 -- 13 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:26:58 2012 Optimize a model with 1970 rows, 970 columns and 6240 nonzeros Presolve removed 1 rows and 6 columns Presolve time: 0.01s Presolved: 1969 rows, 964 columns, 6234 nonzeros Variable types: 0 continuous, 964 integer (964 binary) Root relaxation: objective 0.000000e+00, 251 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 (442 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 -- 6 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:26:58 2012 Optimize a model with 1040 rows, 640 columns and 3120 nonzeros Presolve removed 1 rows and 3 columns Presolve time: 0.00s Presolved: 1039 rows, 637 columns, 3117 nonzeros Variable types: 0 continuous, 637 integer (637 binary) Root relaxation: objective 0.000000e+00, 252 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 0 186 - 0.00000 - - 0s 0 0 0.00000 0 182 - 0.00000 - - 0s 0 0 0.00000 0 226 - 0.00000 - - 0s 0 0 0.00000 0 266 - 0.00000 - - 0s 0 0 0.00000 0 247 - 0.00000 - - 0s 0 0 0.00000 0 152 - 0.00000 - - 0s 0 0 0.00000 0 250 - 0.00000 - - 0s 0 0 0.00000 0 164 - 0.00000 - - 0s 0 0 0.00000 0 264 - 0.00000 - - 0s 0 0 0.00000 0 160 - 0.00000 - - 0s 0 2 0.00000 0 160 - 0.00000 - - 0s Cutting planes: Zero half: 48 Explored 9 nodes (10344 simplex iterations) in 0.68 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound -, gap - current bounds on the number of colors: 3 -- 6 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:26:58 2012 Optimize a model with 1350 rows, 750 columns and 4160 nonzeros Presolve removed 1 rows and 4 columns Presolve time: 0.00s Presolved: 1349 rows, 746 columns, 4156 nonzeros Variable types: 0 continuous, 746 integer (746 binary) Root relaxation: objective 0.000000e+00, 281 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 55 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (1193 simplex iterations) in 0.03 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: 4