3.66/1.78 WORST_CASE(Omega(n^1), O(n^1)) 3.66/1.79 proof of /export/starexec/sandbox/benchmark/theBenchmark.koat 3.66/1.79 # AProVE Commit ID: 48fb2092695e11cc9f56e44b17a92a5f88ffb256 marcel 20180622 unpublished dirty 3.66/1.79 3.66/1.79 3.66/1.79 The runtime complexity of the given CpxIntTrs could be proven to be BOUNDS(n^1, max(1, 1 + Arg_0 + -1 * Arg_1)). 3.66/1.79 3.66/1.79 (0) CpxIntTrs 3.66/1.79 (1) Koat2 Proof [FINISHED, 27 ms] 3.66/1.79 (2) BOUNDS(1, max(1, 1 + Arg_0 + -1 * Arg_1)) 3.66/1.79 (3) Loat Proof [FINISHED, 120 ms] 3.66/1.79 (4) BOUNDS(n^1, INF) 3.66/1.79 3.66/1.79 3.66/1.79 ---------------------------------------- 3.66/1.79 3.66/1.79 (0) 3.66/1.79 Obligation: 3.66/1.79 Complexity Int TRS consisting of the following rules: 3.66/1.79 eval(A, B) -> Com_1(eval(A - 1, B)) :|: A >= B + 1 3.66/1.79 start(A, B) -> Com_1(eval(A, B)) :|: TRUE 3.66/1.79 3.66/1.79 The start-symbols are:[start_2] 3.66/1.79 3.66/1.79 3.66/1.79 ---------------------------------------- 3.66/1.79 3.66/1.79 (1) Koat2 Proof (FINISHED) 3.66/1.79 YES( ?, max([1, 1+Arg_0-Arg_1]) {O(n)}) 3.66/1.79 3.66/1.79 3.66/1.79 3.66/1.79 Initial Complexity Problem: 3.66/1.79 3.66/1.79 Start: start 3.66/1.79 3.66/1.79 Program_Vars: Arg_0, Arg_1 3.66/1.79 3.66/1.79 Temp_Vars: 3.66/1.79 3.66/1.79 Locations: eval, start 3.66/1.79 3.66/1.79 Transitions: 3.66/1.79 3.66/1.79 eval(Arg_0,Arg_1) -> eval(Arg_0-1,Arg_1):|:Arg_1+1 <= Arg_0 3.66/1.79 3.66/1.79 start(Arg_0,Arg_1) -> eval(Arg_0,Arg_1):|: 3.66/1.79 3.66/1.79 3.66/1.79 3.66/1.79 Timebounds: 3.66/1.79 3.66/1.79 Overall timebound: max([1, 1+Arg_0-Arg_1]) {O(n)} 3.66/1.79 3.66/1.79 0: eval->eval: max([0, Arg_0-Arg_1]) {O(n)} 3.66/1.79 3.66/1.79 1: start->eval: 1 {O(1)} 3.66/1.79 3.66/1.79 3.66/1.79 3.66/1.79 Costbounds: 3.66/1.79 3.66/1.79 Overall costbound: max([1, 1+Arg_0-Arg_1]) {O(n)} 3.66/1.79 3.66/1.79 0: eval->eval: max([0, Arg_0-Arg_1]) {O(n)} 3.66/1.79 3.66/1.79 1: start->eval: 1 {O(1)} 3.66/1.79 3.66/1.79 3.66/1.79 3.66/1.79 Sizebounds: 3.66/1.79 3.66/1.79 `Lower: 3.66/1.79 3.66/1.79 0: eval->eval, Arg_0: Arg_0-max([0, Arg_0-Arg_1]) {O(n)} 3.66/1.79 3.66/1.79 0: eval->eval, Arg_1: Arg_1 {O(n)} 3.66/1.79 3.66/1.79 1: start->eval, Arg_0: Arg_0 {O(n)} 3.66/1.79 3.66/1.79 1: start->eval, Arg_1: Arg_1 {O(n)} 3.66/1.79 3.66/1.79 `Upper: 3.66/1.79 3.66/1.79 0: eval->eval, Arg_0: Arg_0 {O(n)} 3.66/1.79 3.66/1.79 0: eval->eval, Arg_1: Arg_1 {O(n)} 3.66/1.79 3.66/1.79 1: start->eval, Arg_0: Arg_0 {O(n)} 3.66/1.79 3.66/1.79 1: start->eval, Arg_1: Arg_1 {O(n)} 3.66/1.79 3.66/1.79 3.66/1.79 ---------------------------------------- 3.66/1.79 3.66/1.79 (2) 3.66/1.79 BOUNDS(1, max(1, 1 + Arg_0 + -1 * Arg_1)) 3.66/1.79 3.66/1.79 ---------------------------------------- 3.66/1.79 3.66/1.79 (3) Loat Proof (FINISHED) 3.66/1.79 3.66/1.79 3.66/1.79 ### Pre-processing the ITS problem ### 3.66/1.79 3.66/1.79 3.66/1.79 3.66/1.79 Initial linear ITS problem 3.66/1.79 3.66/1.79 Start location: start 3.66/1.79 3.66/1.79 0: eval -> eval : A'=-1+A, [ A>=1+B ], cost: 1 3.66/1.79 3.66/1.79 1: start -> eval : [], cost: 1 3.66/1.79 3.66/1.79 3.66/1.79 3.66/1.79 ### Simplification by acceleration and chaining ### 3.66/1.79 3.66/1.79 3.66/1.79 3.66/1.79 Accelerating simple loops of location 0. 3.66/1.79 3.66/1.79 Accelerating the following rules: 3.66/1.79 3.66/1.79 0: eval -> eval : A'=-1+A, [ A>=1+B ], cost: 1 3.66/1.79 3.66/1.79 3.66/1.79 3.66/1.79 Accelerated rule 0 with metering function A-B, yielding the new rule 2. 3.66/1.79 3.66/1.79 Removing the simple loops: 0. 3.66/1.79 3.66/1.79 3.66/1.79 3.66/1.79 Accelerated all simple loops using metering functions (where possible): 3.66/1.79 3.66/1.79 Start location: start 3.66/1.79 3.66/1.79 2: eval -> eval : A'=B, [ A>=1+B ], cost: A-B 3.66/1.79 3.66/1.79 1: start -> eval : [], cost: 1 3.66/1.79 3.66/1.79 3.66/1.79 3.66/1.79 Chained accelerated rules (with incoming rules): 3.66/1.79 3.66/1.79 Start location: start 3.66/1.79 3.66/1.79 1: start -> eval : [], cost: 1 3.66/1.79 3.66/1.79 3: start -> eval : A'=B, [ A>=1+B ], cost: 1+A-B 3.66/1.79 3.66/1.79 3.66/1.79 3.66/1.79 Removed unreachable locations (and leaf rules with constant cost): 3.66/1.79 3.66/1.79 Start location: start 3.66/1.79 3.66/1.79 3: start -> eval : A'=B, [ A>=1+B ], cost: 1+A-B 3.66/1.79 3.66/1.79 3.66/1.79 3.66/1.79 ### Computing asymptotic complexity ### 3.66/1.79 3.66/1.79 3.66/1.79 3.66/1.79 Fully simplified ITS problem 3.66/1.79 3.66/1.79 Start location: start 3.66/1.79 3.66/1.79 3: start -> eval : A'=B, [ A>=1+B ], cost: 1+A-B 3.66/1.79 3.66/1.79 3.66/1.79 3.66/1.79 Computing asymptotic complexity for rule 3 3.66/1.79 3.66/1.79 Solved the limit problem by the following transformations: 3.66/1.79 3.66/1.79 Created initial limit problem: 3.66/1.79 3.66/1.79 1+A-B (+), A-B (+/+!) [not solved] 3.66/1.79 3.66/1.79 3.66/1.79 3.66/1.79 removing all constraints (solved by SMT) 3.66/1.79 3.66/1.79 resulting limit problem: [solved] 3.66/1.79 3.66/1.79 3.66/1.79 3.66/1.79 applying transformation rule (C) using substitution {A==0,B==-n} 3.66/1.79 3.66/1.79 resulting limit problem: 3.66/1.79 3.66/1.79 [solved] 3.66/1.79 3.66/1.79 3.66/1.79 3.66/1.79 Solution: 3.66/1.79 3.66/1.79 A / 0 3.66/1.79 3.66/1.79 B / -n 3.66/1.79 3.66/1.79 Resulting cost 1+n has complexity: Poly(n^1) 3.66/1.79 3.66/1.79 3.66/1.79 3.66/1.79 Found new complexity Poly(n^1). 3.66/1.79 3.66/1.79 3.66/1.79 3.66/1.79 Obtained the following overall complexity (w.r.t. the length of the input n): 3.66/1.79 3.66/1.79 Complexity: Poly(n^1) 3.66/1.79 3.66/1.79 Cpx degree: 1 3.66/1.79 3.66/1.79 Solved cost: 1+n 3.66/1.79 3.66/1.79 Rule cost: 1+A-B 3.66/1.79 3.66/1.79 Rule guard: [ A>=1+B ] 3.66/1.79 3.66/1.79 3.66/1.79 3.66/1.79 WORST_CASE(Omega(n^1),?) 3.66/1.79 3.66/1.79 3.66/1.79 ---------------------------------------- 3.66/1.79 3.66/1.79 (4) 3.66/1.79 BOUNDS(n^1, INF) 3.66/1.81 EOF