current bounds on the number of colors: 0 -- 81 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:21:35 2012 Optimize a model with 7761 rows, 3432 columns and 26280 nonzeros Presolve time: 0.05s Presolved: 7761 rows, 3432 columns, 26280 nonzeros Variable types: 0 continuous, 3432 integer (3432 binary) Root relaxation: objective 0.000000e+00, 210 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 (355 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 -- 40 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:21:35 2012 Optimize a model with 3921 rows, 1812 columns and 13140 nonzeros Presolve time: 0.02s Presolved: 3921 rows, 1812 columns, 13140 nonzeros Variable types: 0 continuous, 1812 integer (1812 binary) Root relaxation: objective 0.000000e+00, 189 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 (321 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 -- 20 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:21:35 2012 Optimize a model with 2001 rows, 1002 columns and 6570 nonzeros Presolve time: 0.01s Presolved: 2001 rows, 1002 columns, 6570 nonzeros Variable types: 0 continuous, 1002 integer (1002 binary) Root relaxation: objective 0.000000e+00, 177 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 (306 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 Fri Dec 14 18:21:35 2012 Optimize a model with 1041 rows, 597 columns and 3285 nonzeros Presolve time: 0.00s Presolved: 1041 rows, 597 columns, 3285 nonzeros Variable types: 0 continuous, 597 integer (597 binary) Root relaxation: objective 0.000000e+00, 199 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 (322 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 -- 5 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:21:35 2012 Optimize a model with 465 rows, 354 columns and 1314 nonzeros Presolve removed 81 rows and 81 columns Presolve time: 0.00s Presolved: 384 rows, 273 columns, 1152 nonzeros Variable types: 0 continuous, 273 integer (273 binary) Root relaxation: objective 0.000000e+00, 90 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 81 - 0.00000 - - 0s Explored 0 nodes (327 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 Fri Dec 14 18:21:35 2012 Optimize a model with 657 rows, 435 columns and 1971 nonzeros Presolve time: 0.00s Presolved: 657 rows, 435 columns, 1971 nonzeros Variable types: 0 continuous, 435 integer (435 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 0.00000 0 154 - 0.00000 - - 0s 0 0 0.00000 0 136 - 0.00000 - - 0s 0 0 0.00000 0 152 - 0.00000 - - 0s 0 0 0.00000 0 152 - 0.00000 - - 0s 0 0 0.00000 0 148 - 0.00000 - - 0s 0 0 0.00000 0 140 - 0.00000 - - 0s 0 0 0.00000 0 149 - 0.00000 - - 0s 0 0 0.00000 0 128 - 0.00000 - - 0s 0 0 0.00000 0 126 - 0.00000 - - 0s 0 0 0.00000 0 116 - 0.00000 - - 0s 0 0 0.00000 0 146 - 0.00000 - - 0s 0 0 0.00000 0 137 - 0.00000 - - 0s 0 0 0.00000 0 120 - 0.00000 - - 0s 0 0 0.00000 0 144 - 0.00000 - - 0s 0 0 0.00000 0 152 - 0.00000 - - 0s 0 0 0.00000 0 143 - 0.00000 - - 0s 0 2 0.00000 0 143 - 0.00000 - - 0s Cutting planes: Zero half: 36 Explored 23 nodes (9795 simplex iterations) in 0.41 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 -- 5 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:21:36 2012 Optimize a model with 849 rows, 516 columns and 2628 nonzeros Presolve time: 0.00s Presolved: 849 rows, 516 columns, 2628 nonzeros Variable types: 0 continuous, 516 integer (516 binary) Root relaxation: objective 0.000000e+00, 205 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 (339 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% optimal solution found: number of colors: 4