current bounds on the number of colors: 0 -- 106 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:57:27 2012 Optimize a model with 30316 rows, 6188 columns and 96248 nonzeros Presolve time: 0.14s Presolved: 30316 rows, 6188 columns, 96248 nonzeros Variable types: 0 continuous, 6188 integer (6188 binary) Root relaxation: objective 0.000000e+00, 412 iterations, 0.03 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 (669 simplex iterations) in 0.22 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 -- 53 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:57:27 2012 Optimize a model with 14926 rows, 3326 columns and 47216 nonzeros Presolve time: 0.06s Presolved: 14926 rows, 3326 columns, 47216 nonzeros Variable types: 0 continuous, 3326 integer (3326 binary) Root relaxation: objective 0.000000e+00, 246 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 (484 simplex iterations) in 0.09 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 -- 26 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:57:27 2012 Optimize a model with 7516 rows, 1948 columns and 23608 nonzeros Presolve time: 0.02s Presolved: 7516 rows, 1948 columns, 23608 nonzeros Variable types: 0 continuous, 1948 integer (1948 binary) Root relaxation: objective 0.000000e+00, 214 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 (411 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 -- 13 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:57:28 2012 Optimize a model with 3526 rows, 1206 columns and 10896 nonzeros Presolve time: 0.01s Presolved: 3526 rows, 1206 columns, 10896 nonzeros Variable types: 0 continuous, 1206 integer (1206 binary) Root relaxation: objective 0.000000e+00, 224 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 20 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (1061 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 -- 6 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:57:28 2012 Optimize a model with 1816 rows, 888 columns and 5448 nonzeros Presolve time: 0.00s Presolved: 1816 rows, 888 columns, 5448 nonzeros Variable types: 0 continuous, 888 integer (888 binary) Root relaxation: objective 0.000000e+00, 232 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 0 164 - 0.00000 - - 0s 0 0 0.00000 0 206 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (3205 simplex iterations) in 0.28 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: 3 -- 6 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:57:28 2012 Optimize a model with 2386 rows, 994 columns and 7264 nonzeros Presolve time: 0.01s Presolved: 2386 rows, 994 columns, 7264 nonzeros Variable types: 0 continuous, 994 integer (994 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 0.00000 0 204 - 0.00000 - - 0s 0 0 0.00000 0 190 - 0.00000 - - 0s 0 0 0.00000 0 202 - 0.00000 - - 0s 0 0 0.00000 0 321 - 0.00000 - - 0s 0 0 0.00000 0 302 - 0.00000 - - 0s 0 0 0.00000 0 296 - 0.00000 - - 1s 0 0 0.00000 0 292 - 0.00000 - - 1s 0 0 0.00000 0 287 - 0.00000 - - 2s 0 0 0.00000 0 283 - 0.00000 - - 2s 0 0 0.00000 0 285 - 0.00000 - - 2s 0 0 0.00000 0 276 - 0.00000 - - 2s 0 0 0.00000 0 279 - 0.00000 - - 3s 0 0 0.00000 0 280 - 0.00000 - - 3s 0 0 0.00000 0 280 - 0.00000 - - 3s 0 2 0.00000 0 280 - 0.00000 - - 4s Cutting planes: Clique: 15 Zero half: 24 Explored 27 nodes (32291 simplex iterations) in 4.61 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: 4 -- 6 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:57:33 2012 Optimize a model with 2956 rows, 1100 columns and 9080 nonzeros Presolve time: 0.01s Presolved: 2956 rows, 1100 columns, 9080 nonzeros Variable types: 0 continuous, 1100 integer (1100 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 0.00000 0 200 - 0.00000 - - 0s 0 0 0.00000 0 192 - 0.00000 - - 0s * 0 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (4692 simplex iterations) in 0.43 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: 5