WORST_CASE(Omega(1),?) ### Pre-processing the ITS problem ### Initial linear ITS problem Start location: l4 0: l0 -> l1 : x^0'=x^post_1, y^0'=y^post_1, z^0'=z^post_1, [ y^0<=x^0 && x^post_1==-z^0+x^0 && y^post_1==-2*z^0+y^0 && z^post_1==-1+z^0 ], cost: 1 2: l0 -> l2 : x^0'=x^post_3, y^0'=y^post_3, z^0'=z^post_3, [ y^0<=x^0 && x^post_3==1+x^0 && y^post_3==x^post_3+y^0 && z^0==z^post_3 ], cost: 1 1: l1 -> l0 : x^0'=x^post_2, y^0'=y^post_2, z^0'=z^post_2, [ x^0==x^post_2 && y^0==y^post_2 && z^0==z^post_2 ], cost: 1 3: l2 -> l0 : x^0'=x^post_4, y^0'=y^post_4, z^0'=z^post_4, [ x^0==x^post_4 && y^0==y^post_4 && z^0==z^post_4 ], cost: 1 4: l3 -> l0 : x^0'=x^post_5, y^0'=y^post_5, z^0'=z^post_5, [ x^0==x^post_5 && y^0==y^post_5 && z^0==z^post_5 ], cost: 1 5: l4 -> l3 : x^0'=x^post_6, y^0'=y^post_6, z^0'=z^post_6, [ x^0==x^post_6 && y^0==y^post_6 && z^0==z^post_6 ], cost: 1 Checking for constant complexity: The following rule is satisfiable with cost >= 1, yielding constant complexity: 5: l4 -> l3 : x^0'=x^post_6, y^0'=y^post_6, z^0'=z^post_6, [ x^0==x^post_6 && y^0==y^post_6 && z^0==z^post_6 ], cost: 1 Simplified all rules, resulting in: Start location: l4 0: l0 -> l1 : x^0'=-z^0+x^0, y^0'=-2*z^0+y^0, z^0'=-1+z^0, [ y^0<=x^0 ], cost: 1 2: l0 -> l2 : x^0'=1+x^0, y^0'=1+x^0+y^0, [ y^0<=x^0 ], cost: 1 1: l1 -> l0 : [], cost: 1 3: l2 -> l0 : [], cost: 1 4: l3 -> l0 : [], cost: 1 5: l4 -> l3 : [], cost: 1 ### Simplification by acceleration and chaining ### Eliminated locations (on linear paths): Start location: l4 7: l0 -> l0 : x^0'=-z^0+x^0, y^0'=-2*z^0+y^0, z^0'=-1+z^0, [ y^0<=x^0 ], cost: 2 8: l0 -> l0 : x^0'=1+x^0, y^0'=1+x^0+y^0, [ y^0<=x^0 ], cost: 2 6: l4 -> l0 : [], cost: 2 Accelerating simple loops of location 0. Accelerating the following rules: 7: l0 -> l0 : x^0'=-z^0+x^0, y^0'=-2*z^0+y^0, z^0'=-1+z^0, [ y^0<=x^0 ], cost: 2 8: l0 -> l0 : x^0'=1+x^0, y^0'=1+x^0+y^0, [ y^0<=x^0 ], cost: 2 Found no metering function for rule 7. Found no metering function for rule 8. Removing the simple loops:. Accelerated all simple loops using metering functions (where possible): Start location: l4 7: l0 -> l0 : x^0'=-z^0+x^0, y^0'=-2*z^0+y^0, z^0'=-1+z^0, [ y^0<=x^0 ], cost: 2 8: l0 -> l0 : x^0'=1+x^0, y^0'=1+x^0+y^0, [ y^0<=x^0 ], cost: 2 6: l4 -> l0 : [], cost: 2 Chained accelerated rules (with incoming rules): Start location: l4 6: l4 -> l0 : [], cost: 2 9: l4 -> l0 : x^0'=-z^0+x^0, y^0'=-2*z^0+y^0, z^0'=-1+z^0, [ y^0<=x^0 ], cost: 4 10: l4 -> l0 : x^0'=1+x^0, y^0'=1+x^0+y^0, [ y^0<=x^0 ], cost: 4 Removed unreachable locations (and leaf rules with constant cost): Start location: l4 ### Computing asymptotic complexity ### Fully simplified ITS problem Start location: l4 Obtained the following overall complexity (w.r.t. the length of the input n): Complexity: Constant Cpx degree: 0 Solved cost: 1 Rule cost: 1 Rule guard: [ x^0==x^post_6 && y^0==y^post_6 && z^0==z^post_6 ] WORST_CASE(Omega(1),?)