current bounds on the number of colors: 0 -- 155 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:57:09 2012 Optimize a model with 46124 rows, 12532 columns and 149842 nonzeros Presolve time: 0.16s Presolved: 46124 rows, 12532 columns, 149842 nonzeros Variable types: 0 continuous, 12532 integer (12532 binary) Root relaxation: objective 0.000000e+00, 547 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 (881 simplex iterations) in 0.26 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 -- 77 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:57:09 2012 Optimize a model with 22841 rows, 6487 columns and 73948 nonzeros Presolve time: 0.12s Presolved: 22841 rows, 6487 columns, 73948 nonzeros Variable types: 0 continuous, 6487 integer (6487 binary) Root relaxation: objective 0.000000e+00, 457 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 (763 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 -- 38 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:57:10 2012 Optimize a model with 11498 rows, 3542 columns and 36974 nonzeros Presolve time: 0.04s Presolved: 11498 rows, 3542 columns, 36974 nonzeros Variable types: 0 continuous, 3542 integer (3542 binary) Root relaxation: objective 0.000000e+00, 316 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 (585 simplex iterations) in 0.07 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 -- 19 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:57:10 2012 Optimize a model with 5528 rows, 1992 columns and 17514 nonzeros Presolve time: 0.02s Presolved: 5528 rows, 1992 columns, 17514 nonzeros Variable types: 0 continuous, 1992 integer (1992 binary) Root relaxation: objective 0.000000e+00, 342 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 (590 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 -- 9 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:57:10 2012 Optimize a model with 2543 rows, 1217 columns and 7784 nonzeros Presolve time: 0.01s Presolved: 2543 rows, 1217 columns, 7784 nonzeros Variable types: 0 continuous, 1217 integer (1217 binary) Root relaxation: objective 0.000000e+00, 343 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 302 - 0.00000 - - 0s 0 0 0.00000 0 225 - 0.00000 - - 0s 0 0 0.00000 0 280 - 0.00000 - - 0s 0 0 0.00000 0 280 - 0.00000 - - 0s 0 0 0.00000 0 252 - 0.00000 - - 0s 0 0 0.00000 0 260 - 0.00000 - - 0s 0 0 0.00000 0 232 - 0.00000 - - 1s 0 0 0.00000 0 238 - 0.00000 - - 1s 0 0 0.00000 0 224 - 0.00000 - - 1s 0 0 0.00000 0 217 - 0.00000 - - 1s 0 0 0.00000 0 188 - 0.00000 - - 1s 0 0 0.00000 0 180 - 0.00000 - - 1s 0 0 0.00000 0 182 - 0.00000 - - 1s 0 0 0.00000 0 174 - 0.00000 - - 2s 0 0 0.00000 0 152 - 0.00000 - - 2s 0 0 0.00000 0 140 - 0.00000 - - 2s 0 0 0.00000 0 259 - 0.00000 - - 2s 0 0 0.00000 0 259 - 0.00000 - - 2s 0 2 0.00000 0 259 - 0.00000 - - 3s * 134 0 23 0.0000000 0.00000 0.0% 66.5 3s Cutting planes: Zero half: 3 Explored 135 nodes (44813 simplex iterations) in 3.75 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 -- 4 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:57:14 2012 Optimize a model with 1349 rows, 907 columns and 3892 nonzeros Presolve removed 155 rows and 155 columns Presolve time: 0.00s Presolved: 1194 rows, 752 columns, 3582 nonzeros Variable types: 0 continuous, 752 integer (752 binary) Root relaxation: objective 0.000000e+00, 164 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 0 155 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (683 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 -- 4 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:57:14 2012 Optimize a model with 1946 rows, 1062 columns and 5838 nonzeros Presolve time: 0.00s Presolved: 1946 rows, 1062 columns, 5838 nonzeros Variable types: 0 continuous, 1062 integer (1062 binary) Root relaxation: objective 0.000000e+00, 360 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 0 306 - 0.00000 - - 0s 0 0 0.00000 0 308 - 0.00000 - - 0s 0 0 0.00000 0 394 - 0.00000 - - 0s 0 0 0.00000 0 422 - 0.00000 - - 0s 0 0 0.00000 0 379 - 0.00000 - - 0s 0 0 0.00000 0 406 - 0.00000 - - 1s 0 0 0.00000 0 391 - 0.00000 - - 1s 0 0 0.00000 0 385 - 0.00000 - - 1s 0 0 0.00000 0 410 - 0.00000 - - 2s 0 0 infeasible 0 - 0.10000 - - 2s Cutting planes: Clique: 1 Zero half: 303 Explored 0 nodes (18036 simplex iterations) in 2.27 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound 1.000000000000e+00, gap - optimal solution found: number of colors: 4