current bounds on the number of colors: 0 -- 96 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:49:07 2012 Optimize a model with 20976 rows, 5043 columns and 67248 nonzeros Presolve time: 0.12s Presolved: 20976 rows, 5043 columns, 67248 nonzeros Variable types: 0 continuous, 5043 integer (5043 binary) Root relaxation: objective 0.000000e+00, 293 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 (535 simplex iterations) in 0.17 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 -- 48 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:49:07 2012 Optimize a model with 10536 rows, 2739 columns and 33624 nonzeros Presolve time: 0.04s Presolved: 10536 rows, 2739 columns, 33624 nonzeros Variable types: 0 continuous, 2739 integer (2739 binary) Root relaxation: objective 0.000000e+00, 231 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 (431 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 -- 24 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:49:08 2012 Optimize a model with 5316 rows, 1587 columns and 16812 nonzeros Presolve time: 0.02s Presolved: 5316 rows, 1587 columns, 16812 nonzeros Variable types: 0 continuous, 1587 integer (1587 binary) Root relaxation: objective 0.000000e+00, 203 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 (383 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 -- 12 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:49:08 2012 Optimize a model with 2706 rows, 1011 columns and 8406 nonzeros Presolve time: 0.01s Presolved: 2706 rows, 1011 columns, 8406 nonzeros Variable types: 0 continuous, 1011 integer (1011 binary) Root relaxation: objective 0.000000e+00, 217 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 (585 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 -- 6 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:49:08 2012 Optimize a model with 1401 rows, 723 columns and 4203 nonzeros Presolve time: 0.00s Presolved: 1401 rows, 723 columns, 4203 nonzeros Variable types: 0 continuous, 723 integer (723 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 0 188 - 0.00000 - - 0s 0 0 0.00000 0 192 - 0.00000 - - 0s 0 0 0.00000 0 280 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Cutting planes: Gomory: 27 Zero half: 552 Explored 0 nodes (3374 simplex iterations) in 0.32 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 19:49:08 2012 Optimize a model with 1836 rows, 819 columns and 5604 nonzeros Presolve time: 0.00s Presolved: 1836 rows, 819 columns, 5604 nonzeros Variable types: 0 continuous, 819 integer (819 binary) Root relaxation: objective 0.000000e+00, 222 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 0 188 - 0.00000 - - 0s 0 0 0.00000 0 196 - 0.00000 - - 0s 0 0 0.00000 0 208 - 0.00000 - - 0s 0 0 0.00000 0 262 - 0.00000 - - 0s 0 0 0.00000 0 164 - 0.00000 - - 0s 0 0 0.00000 0 234 - 0.00000 - - 0s 0 0 0.00000 0 247 - 0.00000 - - 1s 0 0 0.00000 0 251 - 0.00000 - - 1s 0 0 0.00000 0 251 - 0.00000 - - 1s 0 2 0.00000 0 251 - 0.00000 - - 1s 707 23 0.00000 0 147 - 0.00000 - 65.4 5s Cutting planes: Clique: 1 Zero half: 5 Explored 825 nodes (95147 simplex iterations) in 8.08 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 19:49:16 2012 Optimize a model with 2271 rows, 915 columns and 7005 nonzeros Presolve time: 0.01s Presolved: 2271 rows, 915 columns, 7005 nonzeros Variable types: 0 continuous, 915 integer (915 binary) Root relaxation: objective 0.000000e+00, 203 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 (1435 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% optimal solution found: number of colors: 5