current bounds on the number of colors: 0 -- 45 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:03:58 2012 Optimize a model with 11111 rows, 1493 columns and 34188 nonzeros Presolve time: 0.04s Presolved: 11111 rows, 1493 columns, 34188 nonzeros Variable types: 0 continuous, 1493 integer (1493 binary) Root relaxation: objective 0.000000e+00, 99 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 (231 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 -- 22 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:03:58 2012 Optimize a model with 5578 rows, 998 columns and 17094 nonzeros Presolve time: 0.02s Presolved: 5578 rows, 998 columns, 17094 nonzeros Variable types: 0 continuous, 998 integer (998 binary) Root relaxation: objective 0.000000e+00, 102 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 24 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (839 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 -- 11 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:03:58 2012 Optimize a model with 2560 rows, 728 columns and 7770 nonzeros Presolve time: 0.01s Presolved: 2560 rows, 728 columns, 7770 nonzeros Variable types: 0 continuous, 728 integer (728 binary) Root relaxation: objective 0.000000e+00, 94 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 66 - 0.00000 - - 0s 0 0 0.00000 0 56 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (2011 simplex iterations) in 0.21 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: 5 -- 11 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:03:58 2012 Optimize a model with 4069 rows, 863 columns and 12432 nonzeros Presolve time: 0.01s Presolved: 4069 rows, 863 columns, 12432 nonzeros Variable types: 0 continuous, 863 integer (863 binary) Root relaxation: objective 0.000000e+00, 90 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 79 - 0.00000 - - 0s 0 0 0.00000 0 22 - 0.00000 - - 0s 0 0 0.00000 0 142 - 0.00000 - - 0s 0 0 0.00000 0 184 - 0.00000 - - 0s 0 0 0.00000 0 150 - 0.00000 - - 1s 0 0 0.00000 0 144 - 0.00000 - - 1s 0 0 0.00000 0 103 - 0.00000 - - 1s 0 0 0.00000 0 127 - 0.00000 - - 2s 0 0 0.00000 0 159 - 0.00000 - - 2s 0 0 0.00000 0 134 - 0.00000 - - 2s 0 0 0.00000 0 182 - 0.00000 - - 3s 0 0 0.00000 0 180 - 0.00000 - - 3s 0 2 0.00000 0 180 - 0.00000 - - 3s Cutting planes: Clique: 95 Zero half: 7 Explored 53 nodes (33839 simplex iterations) in 4.41 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: 8 -- 11 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:04:03 2012 Optimize a model with 4572 rows, 908 columns and 13986 nonzeros Presolve time: 0.01s Presolved: 4572 rows, 908 columns, 13986 nonzeros Variable types: 0 continuous, 908 integer (908 binary) Root relaxation: objective 0.000000e+00, 101 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 34 - 0.00000 - - 0s * 0 0 0 0.0000000 0.00000 0.0% - 0s Cutting planes: Gomory: 1 Clique: 51 MIR: 7 Zero half: 34 Explored 0 nodes (1202 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% optimal solution found: number of colors: 9