current bounds on the number of colors: 0 -- 111 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 20:06:22 2012 Optimize a model with 34706 rows, 6734 columns and 109890 nonzeros Presolve time: 0.15s Presolved: 34706 rows, 6734 columns, 109890 nonzeros Variable types: 0 continuous, 6734 integer (6734 binary) Root relaxation: objective 0.000000e+00, 296 iterations, 0.04 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 (536 simplex iterations) in 0.24 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 Thu Dec 13 20:06:22 2012 Optimize a model with 17094 rows, 3626 columns and 53946 nonzeros Presolve time: 0.07s Presolved: 17094 rows, 3626 columns, 53946 nonzeros Variable types: 0 continuous, 3626 integer (3626 binary) Root relaxation: objective 0.000000e+00, 274 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 (510 simplex iterations) in 0.10 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 Thu Dec 13 20:06:23 2012 Optimize a model with 8288 rows, 2072 columns and 25974 nonzeros Presolve time: 0.03s Presolved: 8288 rows, 2072 columns, 25974 nonzeros Variable types: 0 continuous, 2072 integer (2072 binary) Root relaxation: objective 0.000000e+00, 232 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 (457 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 20:06:23 2012 Optimize a model with 3885 rows, 1295 columns and 11988 nonzeros Presolve time: 0.01s Presolved: 3885 rows, 1295 columns, 11988 nonzeros Variable types: 0 continuous, 1295 integer (1295 binary) Root relaxation: objective 0.000000e+00, 242 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 0 196 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (1052 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 -- 6 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 20:06:23 2012 Optimize a model with 1998 rows, 962 columns and 5994 nonzeros Presolve time: 0.00s Presolved: 1998 rows, 962 columns, 5994 nonzeros Variable types: 0 continuous, 962 integer (962 binary) Root relaxation: objective 0.000000e+00, 241 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 0 222 - 0.00000 - - 0s 0 0 0.00000 0 232 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (3454 simplex iterations) in 0.36 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 20:06:23 2012 Optimize a model with 2627 rows, 1073 columns and 7992 nonzeros Presolve time: 0.01s Presolved: 2627 rows, 1073 columns, 7992 nonzeros Variable types: 0 continuous, 1073 integer (1073 binary) Root relaxation: objective 0.000000e+00, 250 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 0 216 - 0.00000 - - 0s 0 0 0.00000 0 136 - 0.00000 - - 0s 0 0 0.00000 0 305 - 0.00000 - - 0s 0 0 0.00000 0 339 - 0.00000 - - 0s 0 0 0.00000 0 328 - 0.00000 - - 1s 0 0 0.00000 0 322 - 0.00000 - - 1s 0 0 0.00000 0 311 - 0.00000 - - 2s 0 0 0.00000 0 308 - 0.00000 - - 2s 0 0 0.00000 0 305 - 0.00000 - - 3s 0 0 0.00000 0 313 - 0.00000 - - 3s 0 0 0.00000 0 308 - 0.00000 - - 4s 0 0 0.00000 0 307 - 0.00000 - - 4s 0 0 0.00000 0 298 - 0.00000 - - 5s 0 0 0.00000 0 296 - 0.00000 - - 5s 0 0 0.00000 0 300 - 0.00000 - - 5s 0 0 0.00000 0 300 - 0.00000 - - 6s 0 0 0.00000 0 300 - 0.00000 - - 6s 0 2 0.00000 0 300 - 0.00000 - - 6s Cutting planes: Clique: 7 Zero half: 20 Explored 12 nodes (38656 simplex iterations) in 6.93 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 20:06:30 2012 Optimize a model with 3256 rows, 1184 columns and 9990 nonzeros Presolve time: 0.01s Presolved: 3256 rows, 1184 columns, 9990 nonzeros Variable types: 0 continuous, 1184 integer (1184 binary) Root relaxation: objective 0.000000e+00, 242 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 0 131 - 0.00000 - - 0s 0 0 0.00000 0 166 - 0.00000 - - 0s 0 0 0.00000 0 220 - 0.00000 - - 0s 0 0 0.00000 0 225 - 0.00000 - - 0s 0 0 0.00000 0 116 - 0.00000 - - 1s H 0 0 0.0000000 0.00000 0.0% - 1s Cutting planes: Clique: 2 Zero half: 6 Explored 0 nodes (12641 simplex iterations) in 1.22 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% optimal solution found: number of colors: 5