current bounds on the number of colors: 0 -- 106 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:58:08 2012 Optimize a model with 31005 rows, 6201 columns and 98315 nonzeros Presolve time: 0.14s Presolved: 31005 rows, 6201 columns, 98315 nonzeros Variable types: 0 continuous, 6201 integer (6201 binary) Root relaxation: objective 0.000000e+00, 341 iterations, 0.02 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 (604 simplex iterations) in 0.21 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 19:58:08 2012 Optimize a model with 15264 rows, 3339 columns and 48230 nonzeros Presolve time: 0.06s Presolved: 15264 rows, 3339 columns, 48230 nonzeros Variable types: 0 continuous, 3339 integer (3339 binary) Root relaxation: objective 0.000000e+00, 257 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 (470 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 19:58:08 2012 Optimize a model with 7685 rows, 1961 columns and 24115 nonzeros Presolve time: 0.02s Presolved: 7685 rows, 1961 columns, 24115 nonzeros Variable types: 0 continuous, 1961 integer (1961 binary) Root relaxation: objective 0.000000e+00, 219 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 (428 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 19:58:09 2012 Optimize a model with 3604 rows, 1219 columns and 11130 nonzeros Presolve time: 0.01s Presolved: 3604 rows, 1219 columns, 11130 nonzeros Variable types: 0 continuous, 1219 integer (1219 binary) Root relaxation: objective 0.000000e+00, 226 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 0 122 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (2111 simplex iterations) in 0.12 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 19:58:09 2012 Optimize a model with 1855 rows, 901 columns and 5565 nonzeros Presolve time: 0.00s Presolved: 1855 rows, 901 columns, 5565 nonzeros Variable types: 0 continuous, 901 integer (901 binary) Root relaxation: objective 0.000000e+00, 240 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 0 212 - 0.00000 - - 0s 0 0 0.00000 0 232 - 0.00000 - - 0s 0 0 0.00000 0 315 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Cutting planes: Gomory: 41 Zero half: 711 Explored 0 nodes (4093 simplex iterations) in 0.50 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 19:58:09 2012 Optimize a model with 2438 rows, 1007 columns and 7420 nonzeros Presolve time: 0.01s Presolved: 2438 rows, 1007 columns, 7420 nonzeros Variable types: 0 continuous, 1007 integer (1007 binary) Root relaxation: objective 0.000000e+00, 220 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 0 206 - 0.00000 - - 0s 0 0 0.00000 0 198 - 0.00000 - - 0s 0 0 0.00000 0 308 - 0.00000 - - 0s 0 0 0.00000 0 296 - 0.00000 - - 0s 0 0 0.00000 0 284 - 0.00000 - - 1s 0 0 0.00000 0 182 - 0.00000 - - 1s 0 0 0.00000 0 288 - 0.00000 - - 2s 0 0 0.00000 0 286 - 0.00000 - - 2s 0 0 0.00000 0 285 - 0.00000 - - 2s 0 0 0.00000 0 286 - 0.00000 - - 3s 0 0 0.00000 0 288 - 0.00000 - - 3s 0 0 0.00000 0 288 - 0.00000 - - 3s 0 2 0.00000 0 288 - 0.00000 - - 3s Cutting planes: Clique: 14 Zero half: 39 Explored 71 nodes (39410 simplex iterations) in 4.85 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 19:58:14 2012 Optimize a model with 3021 rows, 1113 columns and 9275 nonzeros Presolve time: 0.01s Presolved: 3021 rows, 1113 columns, 9275 nonzeros Variable types: 0 continuous, 1113 integer (1113 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 0.00000 0 120 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (2321 simplex iterations) in 0.12 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