current bounds on the number of colors: 0 -- 111 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:27:26 2012 Optimize a model with 18591 rows, 6441 columns and 61545 nonzeros Presolve time: 0.12s Presolved: 18591 rows, 6441 columns, 61545 nonzeros Variable types: 0 continuous, 6441 integer (6441 binary) Root relaxation: objective 0.000000e+00, 346 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 (576 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 18:27:27 2012 Optimize a model with 9183 rows, 3333 columns and 30213 nonzeros Presolve time: 0.04s Presolved: 9183 rows, 3333 columns, 30213 nonzeros Variable types: 0 continuous, 3333 integer (3333 binary) Root relaxation: objective 0.000000e+00, 291 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 (496 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 18:27:27 2012 Optimize a model with 4479 rows, 1779 columns and 14547 nonzeros Presolve time: 0.02s Presolved: 4479 rows, 1779 columns, 14547 nonzeros Variable types: 0 continuous, 1779 integer (1779 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 (427 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 18:27:27 2012 Optimize a model with 2127 rows, 1002 columns and 6714 nonzeros Presolve time: 0.01s Presolved: 2127 rows, 1002 columns, 6714 nonzeros Variable types: 0 continuous, 1002 integer (1002 binary) Root relaxation: objective 0.000000e+00, 254 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 (469 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 18:27:27 2012 Optimize a model with 1119 rows, 669 columns and 3357 nonzeros Presolve time: 0.00s Presolved: 1119 rows, 669 columns, 3357 nonzeros Variable types: 0 continuous, 669 integer (669 binary) Root relaxation: objective 0.000000e+00, 270 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 0 206 - 0.00000 - - 0s 0 0 0.00000 0 210 - 0.00000 - - 0s 0 0 0.00000 0 210 - 0.00000 - - 0s 0 0 0.00000 0 212 - 0.00000 - - 0s 0 0 0.00000 0 206 - 0.00000 - - 0s 0 0 0.00000 0 202 - 0.00000 - - 0s 0 0 0.00000 0 237 - 0.00000 - - 0s 0 0 0.00000 0 267 - 0.00000 - - 0s 0 0 0.00000 0 279 - 0.00000 - - 0s 0 0 0.00000 0 279 - 0.00000 - - 0s 0 2 0.00000 0 279 - 0.00000 - - 0s Cutting planes: Zero half: 11 Explored 3 nodes (9744 simplex iterations) in 0.62 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 18:27:27 2012 Optimize a model with 1455 rows, 780 columns and 4476 nonzeros Presolve time: 0.00s Presolved: 1455 rows, 780 columns, 4476 nonzeros Variable types: 0 continuous, 780 integer (780 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 0.00000 0 96 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (1163 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