current bounds on the number of colors: 0 -- 108 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:26:27 2012 Optimize a model with 15174 rows, 6111 columns and 51030 nonzeros Presolve time: 0.11s Presolved: 15174 rows, 6111 columns, 51030 nonzeros Variable types: 0 continuous, 6111 integer (6111 binary) Root relaxation: objective 0.000000e+00, 300 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 (300 simplex iterations) in 0.13 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 -- 54 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:26:27 2012 Optimize a model with 7641 rows, 3195 columns and 25515 nonzeros Presolve time: 0.04s Presolved: 7641 rows, 3195 columns, 25515 nonzeros Variable types: 0 continuous, 3195 integer (3195 binary) Root relaxation: objective 0.000000e+00, 271 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 (477 simplex iterations) in 0.05 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 18:26:27 2012 Optimize a model with 3735 rows, 1683 columns and 12285 nonzeros Presolve time: 0.01s Presolved: 3735 rows, 1683 columns, 12285 nonzeros Variable types: 0 continuous, 1683 integer (1683 binary) Root relaxation: objective 0.000000e+00, 228 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 (410 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 -- 13 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:26:28 2012 Optimize a model with 1782 rows, 927 columns and 5670 nonzeros Presolve time: 0.01s Presolved: 1782 rows, 927 columns, 5670 nonzeros Variable types: 0 continuous, 927 integer (927 binary) Root relaxation: objective 0.000000e+00, 259 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 (443 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 18:26:28 2012 Optimize a model with 945 rows, 603 columns and 2835 nonzeros Presolve time: 0.00s Presolved: 945 rows, 603 columns, 2835 nonzeros Variable types: 0 continuous, 603 integer (603 binary) Root relaxation: objective 0.000000e+00, 276 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 0 200 - 0.00000 - - 0s 0 0 0.00000 0 202 - 0.00000 - - 0s 0 0 0.00000 0 192 - 0.00000 - - 0s 0 0 0.00000 0 200 - 0.00000 - - 0s 0 0 0.00000 0 188 - 0.00000 - - 0s 0 0 0.00000 0 173 - 0.00000 - - 0s 0 0 0.00000 0 172 - 0.00000 - - 0s 0 0 0.00000 0 162 - 0.00000 - - 0s 0 0 0.00000 0 164 - 0.00000 - - 0s 0 0 0.00000 0 176 - 0.00000 - - 0s 0 0 0.00000 0 199 - 0.00000 - - 0s 0 0 0.00000 0 199 - 0.00000 - - 0s 0 2 0.00000 0 199 - 0.00000 - - 0s Cutting planes: Zero half: 17 Explored 30 nodes (11366 simplex iterations) in 0.57 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 18:26:28 2012 Optimize a model with 1224 rows, 711 columns and 3780 nonzeros Presolve time: 0.00s Presolved: 1224 rows, 711 columns, 3780 nonzeros Variable types: 0 continuous, 711 integer (711 binary) Root relaxation: objective 0.000000e+00, 292 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 8 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (1067 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% optimal solution found: number of colors: 4