current bounds on the number of colors: 0 -- 84 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:41:20 2012 Optimize a model with 14154 rows, 3863 columns and 45738 nonzeros Presolve time: 0.08s Presolved: 14154 rows, 3863 columns, 45738 nonzeros Variable types: 0 continuous, 3863 integer (3863 binary) Root relaxation: objective 0.000000e+00, 221 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 (391 simplex iterations) in 0.11 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 -- 42 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:41:20 2012 Optimize a model with 7119 rows, 2099 columns and 22869 nonzeros Presolve time: 0.03s Presolved: 7119 rows, 2099 columns, 22869 nonzeros Variable types: 0 continuous, 2099 integer (2099 binary) Root relaxation: objective 0.000000e+00, 197 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 (349 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 -- 21 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:41:20 2012 Optimize a model with 3434 rows, 1175 columns and 10890 nonzeros Presolve time: 0.01s Presolved: 3434 rows, 1175 columns, 10890 nonzeros Variable types: 0 continuous, 1175 integer (1175 binary) Root relaxation: objective 0.000000e+00, 172 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 (301 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 -- 10 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:41:20 2012 Optimize a model with 1759 rows, 755 columns and 5445 nonzeros Presolve time: 0.00s Presolved: 1759 rows, 755 columns, 5445 nonzeros Variable types: 0 continuous, 755 integer (755 binary) Root relaxation: objective 0.000000e+00, 185 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 58 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (881 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 -- 5 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:41:20 2012 Optimize a model with 754 rows, 503 columns and 2178 nonzeros Presolve removed 84 rows and 84 columns Presolve time: 0.00s Presolved: 670 rows, 419 columns, 2010 nonzeros Variable types: 0 continuous, 419 integer (419 binary) Root relaxation: objective 0.000000e+00, 87 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 84 - 0.00000 - - 0s Explored 0 nodes (361 simplex iterations) in 0.01 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: 2 -- 5 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:41:20 2012 Optimize a model with 1089 rows, 587 columns and 3267 nonzeros Presolve time: 0.00s Presolved: 1089 rows, 587 columns, 3267 nonzeros Variable types: 0 continuous, 587 integer (587 binary) Root relaxation: objective 0.000000e+00, 202 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 0 166 - 0.00000 - - 0s 0 0 0.00000 0 168 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (1583 simplex iterations) in 0.09 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 -- 5 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:41:21 2012 Optimize a model with 1424 rows, 671 columns and 4356 nonzeros Presolve time: 0.00s Presolved: 1424 rows, 671 columns, 4356 nonzeros Variable types: 0 continuous, 671 integer (671 binary) Root relaxation: objective 0.000000e+00, 188 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 0 160 - 0.00000 - - 0s 0 0 0.00000 0 158 - 0.00000 - - 0s 0 0 0.00000 0 115 - 0.00000 - - 0s 0 0 0.00000 0 177 - 0.00000 - - 0s 0 0 0.00000 0 169 - 0.00000 - - 0s 0 0 0.00000 0 157 - 0.00000 - - 0s 0 0 0.00000 0 152 - 0.00000 - - 0s 0 0 0.00000 0 105 - 0.00000 - - 0s 0 0 0.00000 0 170 - 0.00000 - - 0s 0 0 0.00000 0 168 - 0.00000 - - 0s 0 0 0.00000 0 165 - 0.00000 - - 0s 0 0 0.00000 0 95 - 0.00000 - - 0s 0 0 0.00000 0 115 - 0.00000 - - 0s 0 0 0.00000 0 196 - 0.00000 - - 0s 0 0 0.00000 0 181 - 0.00000 - - 0s 0 2 0.00000 0 181 - 0.00000 - - 0s * 157 2 9 0.0000000 0.00000 0.0% 49.3 1s Cutting planes: Zero half: 43 Explored 158 nodes (22039 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: 4