3.88/1.83 YES 3.88/1.84 proof of /export/starexec/sandbox/benchmark/theBenchmark.itrs 3.88/1.84 # AProVE Commit ID: 48fb2092695e11cc9f56e44b17a92a5f88ffb256 marcel 20180622 unpublished dirty 3.88/1.84 3.88/1.84 3.88/1.84 Termination of the given ITRS could be proven: 3.88/1.84 3.88/1.84 (0) ITRS 3.88/1.84 (1) ITRStoIDPProof [EQUIVALENT, 0 ms] 3.88/1.84 (2) IDP 3.88/1.84 (3) UsableRulesProof [EQUIVALENT, 0 ms] 3.88/1.84 (4) IDP 3.88/1.84 (5) IDPNonInfProof [SOUND, 140 ms] 3.88/1.84 (6) IDP 3.88/1.84 (7) IDependencyGraphProof [EQUIVALENT, 0 ms] 3.88/1.84 (8) TRUE 3.88/1.84 3.88/1.84 3.88/1.84 ---------------------------------------- 3.88/1.84 3.88/1.84 (0) 3.88/1.84 Obligation: 3.88/1.84 ITRS problem: 3.88/1.84 3.88/1.84 The following function symbols are pre-defined: 3.88/1.84 <<< 3.88/1.84 & ~ Bwand: (Integer, Integer) -> Integer 3.88/1.84 >= ~ Ge: (Integer, Integer) -> Boolean 3.88/1.84 | ~ Bwor: (Integer, Integer) -> Integer 3.88/1.84 / ~ Div: (Integer, Integer) -> Integer 3.88/1.84 != ~ Neq: (Integer, Integer) -> Boolean 3.88/1.84 && ~ Land: (Boolean, Boolean) -> Boolean 3.88/1.84 ! ~ Lnot: (Boolean) -> Boolean 3.88/1.84 = ~ Eq: (Integer, Integer) -> Boolean 3.88/1.84 <= ~ Le: (Integer, Integer) -> Boolean 3.88/1.84 ^ ~ Bwxor: (Integer, Integer) -> Integer 3.88/1.84 % ~ Mod: (Integer, Integer) -> Integer 3.88/1.84 > ~ Gt: (Integer, Integer) -> Boolean 3.88/1.84 + ~ Add: (Integer, Integer) -> Integer 3.88/1.84 -1 ~ UnaryMinus: (Integer) -> Integer 3.88/1.84 < ~ Lt: (Integer, Integer) -> Boolean 3.88/1.84 || ~ Lor: (Boolean, Boolean) -> Boolean 3.88/1.84 - ~ Sub: (Integer, Integer) -> Integer 3.88/1.84 ~ ~ Bwnot: (Integer) -> Integer 3.88/1.84 * ~ Mul: (Integer, Integer) -> Integer 3.88/1.84 >>> 3.88/1.84 3.88/1.84 The TRS R consists of the following rules: 3.88/1.84 eval(x, y) -> Cond_eval(x > 0 && y > 0, x, y) 3.88/1.84 Cond_eval(TRUE, x, y) -> eval(x - 1, y - 1) 3.88/1.84 The set Q consists of the following terms: 3.88/1.84 eval(x0, x1) 3.88/1.84 Cond_eval(TRUE, x0, x1) 3.88/1.84 3.88/1.84 ---------------------------------------- 3.88/1.84 3.88/1.84 (1) ITRStoIDPProof (EQUIVALENT) 3.88/1.84 Added dependency pairs 3.88/1.84 ---------------------------------------- 3.88/1.84 3.88/1.84 (2) 3.88/1.84 Obligation: 3.88/1.84 IDP problem: 3.88/1.84 The following function symbols are pre-defined: 3.88/1.84 <<< 3.88/1.84 & ~ Bwand: (Integer, Integer) -> Integer 3.88/1.84 >= ~ Ge: (Integer, Integer) -> Boolean 3.88/1.84 | ~ Bwor: (Integer, Integer) -> Integer 3.88/1.84 / ~ Div: (Integer, Integer) -> Integer 3.88/1.84 != ~ Neq: (Integer, Integer) -> Boolean 3.88/1.84 && ~ Land: (Boolean, Boolean) -> Boolean 3.88/1.84 ! ~ Lnot: (Boolean) -> Boolean 3.88/1.84 = ~ Eq: (Integer, Integer) -> Boolean 3.88/1.84 <= ~ Le: (Integer, Integer) -> Boolean 3.88/1.84 ^ ~ Bwxor: (Integer, Integer) -> Integer 3.88/1.84 % ~ Mod: (Integer, Integer) -> Integer 3.88/1.84 > ~ Gt: (Integer, Integer) -> Boolean 3.88/1.84 + ~ Add: (Integer, Integer) -> Integer 3.88/1.84 -1 ~ UnaryMinus: (Integer) -> Integer 3.88/1.84 < ~ Lt: (Integer, Integer) -> Boolean 3.88/1.84 || ~ Lor: (Boolean, Boolean) -> Boolean 3.88/1.84 - ~ Sub: (Integer, Integer) -> Integer 3.88/1.84 ~ ~ Bwnot: (Integer) -> Integer 3.88/1.84 * ~ Mul: (Integer, Integer) -> Integer 3.88/1.84 >>> 3.88/1.84 3.88/1.84 3.88/1.84 The following domains are used: 3.88/1.84 Boolean, Integer 3.88/1.84 3.88/1.84 The ITRS R consists of the following rules: 3.88/1.84 eval(x, y) -> Cond_eval(x > 0 && y > 0, x, y) 3.88/1.84 Cond_eval(TRUE, x, y) -> eval(x - 1, y - 1) 3.88/1.84 3.88/1.84 The integer pair graph contains the following rules and edges: 3.88/1.84 (0): EVAL(x[0], y[0]) -> COND_EVAL(x[0] > 0 && y[0] > 0, x[0], y[0]) 3.88/1.84 (1): COND_EVAL(TRUE, x[1], y[1]) -> EVAL(x[1] - 1, y[1] - 1) 3.88/1.84 3.88/1.84 (0) -> (1), if (x[0] > 0 && y[0] > 0 & x[0] ->^* x[1] & y[0] ->^* y[1]) 3.88/1.84 (1) -> (0), if (x[1] - 1 ->^* x[0] & y[1] - 1 ->^* y[0]) 3.88/1.84 3.88/1.84 The set Q consists of the following terms: 3.88/1.84 eval(x0, x1) 3.88/1.84 Cond_eval(TRUE, x0, x1) 3.88/1.84 3.88/1.84 ---------------------------------------- 3.88/1.84 3.88/1.84 (3) UsableRulesProof (EQUIVALENT) 3.88/1.84 As all Q-normal forms are R-normal forms we are in the innermost case. Hence, by the usable rules processor [LPAR04] we can delete all non-usable rules [FROCOS05] from R. 3.88/1.84 ---------------------------------------- 3.88/1.84 3.88/1.84 (4) 3.88/1.84 Obligation: 3.88/1.84 IDP problem: 3.88/1.84 The following function symbols are pre-defined: 3.88/1.84 <<< 3.88/1.84 & ~ Bwand: (Integer, Integer) -> Integer 3.88/1.84 >= ~ Ge: (Integer, Integer) -> Boolean 3.88/1.84 | ~ Bwor: (Integer, Integer) -> Integer 3.88/1.84 / ~ Div: (Integer, Integer) -> Integer 3.88/1.84 != ~ Neq: (Integer, Integer) -> Boolean 3.88/1.84 && ~ Land: (Boolean, Boolean) -> Boolean 3.88/1.84 ! ~ Lnot: (Boolean) -> Boolean 3.88/1.84 = ~ Eq: (Integer, Integer) -> Boolean 3.88/1.84 <= ~ Le: (Integer, Integer) -> Boolean 3.88/1.84 ^ ~ Bwxor: (Integer, Integer) -> Integer 3.88/1.84 % ~ Mod: (Integer, Integer) -> Integer 3.88/1.84 > ~ Gt: (Integer, Integer) -> Boolean 3.88/1.84 + ~ Add: (Integer, Integer) -> Integer 3.88/1.84 -1 ~ UnaryMinus: (Integer) -> Integer 3.88/1.84 < ~ Lt: (Integer, Integer) -> Boolean 3.88/1.84 || ~ Lor: (Boolean, Boolean) -> Boolean 3.88/1.84 - ~ Sub: (Integer, Integer) -> Integer 3.88/1.84 ~ ~ Bwnot: (Integer) -> Integer 3.88/1.84 * ~ Mul: (Integer, Integer) -> Integer 3.88/1.84 >>> 3.88/1.84 3.88/1.84 3.88/1.84 The following domains are used: 3.88/1.84 Boolean, Integer 3.88/1.84 3.88/1.84 R is empty. 3.88/1.84 3.88/1.84 The integer pair graph contains the following rules and edges: 3.88/1.84 (0): EVAL(x[0], y[0]) -> COND_EVAL(x[0] > 0 && y[0] > 0, x[0], y[0]) 3.88/1.84 (1): COND_EVAL(TRUE, x[1], y[1]) -> EVAL(x[1] - 1, y[1] - 1) 3.88/1.84 3.88/1.84 (0) -> (1), if (x[0] > 0 && y[0] > 0 & x[0] ->^* x[1] & y[0] ->^* y[1]) 3.88/1.84 (1) -> (0), if (x[1] - 1 ->^* x[0] & y[1] - 1 ->^* y[0]) 3.88/1.84 3.88/1.84 The set Q consists of the following terms: 3.88/1.84 eval(x0, x1) 3.88/1.84 Cond_eval(TRUE, x0, x1) 3.88/1.84 3.88/1.84 ---------------------------------------- 3.88/1.84 3.88/1.84 (5) IDPNonInfProof (SOUND) 3.88/1.84 Used the following options for this NonInfProof: 3.88/1.84 3.88/1.84 IDPGPoloSolver: 3.88/1.84 Range: [(-1,2)] 3.88/1.84 IsNat: false 3.88/1.84 Interpretation Shape Heuristic: aprove.DPFramework.IDPProblem.Processors.nonInf.poly.IdpDefaultShapeHeuristic@43b4af30 3.88/1.84 Constraint Generator: NonInfConstraintGenerator: 3.88/1.84 PathGenerator: MetricPathGenerator: 3.88/1.84 Max Left Steps: 1 3.88/1.84 Max Right Steps: 1 3.88/1.84 3.88/1.84 3.88/1.84 3.88/1.84 The constraints were generated the following way: 3.88/1.84 3.88/1.84 The DP Problem is simplified using the Induction Calculus [NONINF] with the following steps: 3.88/1.84 3.88/1.84 Note that final constraints are written in bold face. 3.88/1.84 3.88/1.84 3.88/1.84 3.88/1.84 For Pair EVAL(x, y) -> COND_EVAL(&&(>(x, 0), >(y, 0)), x, y) the following chains were created: 3.88/1.84 *We consider the chain EVAL(x[0], y[0]) -> COND_EVAL(&&(>(x[0], 0), >(y[0], 0)), x[0], y[0]), COND_EVAL(TRUE, x[1], y[1]) -> EVAL(-(x[1], 1), -(y[1], 1)) which results in the following constraint: 3.88/1.84 3.88/1.84 (1) (&&(>(x[0], 0), >(y[0], 0))=TRUE & x[0]=x[1] & y[0]=y[1] ==> EVAL(x[0], y[0])_>=_NonInfC & EVAL(x[0], y[0])_>=_COND_EVAL(&&(>(x[0], 0), >(y[0], 0)), x[0], y[0]) & (U^Increasing(COND_EVAL(&&(>(x[0], 0), >(y[0], 0)), x[0], y[0])), >=)) 3.88/1.84 3.88/1.84 3.88/1.84 3.88/1.84 We simplified constraint (1) using rules (IV), (IDP_BOOLEAN) which results in the following new constraint: 3.88/1.84 3.88/1.84 (2) (>(x[0], 0)=TRUE & >(y[0], 0)=TRUE ==> EVAL(x[0], y[0])_>=_NonInfC & EVAL(x[0], y[0])_>=_COND_EVAL(&&(>(x[0], 0), >(y[0], 0)), x[0], y[0]) & (U^Increasing(COND_EVAL(&&(>(x[0], 0), >(y[0], 0)), x[0], y[0])), >=)) 3.88/1.84 3.88/1.84 3.88/1.84 3.88/1.84 We simplified constraint (2) using rule (POLY_CONSTRAINTS) which results in the following new constraint: 3.88/1.84 3.88/1.84 (3) (x[0] + [-1] >= 0 & y[0] + [-1] >= 0 ==> (U^Increasing(COND_EVAL(&&(>(x[0], 0), >(y[0], 0)), x[0], y[0])), >=) & [(-1)bni_12 + (-1)Bound*bni_12] + [bni_12]x[0] >= 0 & [(-1)bso_13] >= 0) 3.88/1.84 3.88/1.84 3.88/1.84 3.88/1.84 We simplified constraint (3) using rule (IDP_POLY_SIMPLIFY) which results in the following new constraint: 3.88/1.84 3.88/1.84 (4) (x[0] + [-1] >= 0 & y[0] + [-1] >= 0 ==> (U^Increasing(COND_EVAL(&&(>(x[0], 0), >(y[0], 0)), x[0], y[0])), >=) & [(-1)bni_12 + (-1)Bound*bni_12] + [bni_12]x[0] >= 0 & [(-1)bso_13] >= 0) 3.88/1.84 3.88/1.84 3.88/1.84 3.88/1.84 We simplified constraint (4) using rule (POLY_REMOVE_MIN_MAX) which results in the following new constraint: 3.88/1.84 3.88/1.84 (5) (x[0] + [-1] >= 0 & y[0] + [-1] >= 0 ==> (U^Increasing(COND_EVAL(&&(>(x[0], 0), >(y[0], 0)), x[0], y[0])), >=) & [(-1)bni_12 + (-1)Bound*bni_12] + [bni_12]x[0] >= 0 & [(-1)bso_13] >= 0) 3.88/1.84 3.88/1.84 3.88/1.84 3.88/1.84 3.88/1.84 3.88/1.84 3.88/1.84 3.88/1.84 3.88/1.84 For Pair COND_EVAL(TRUE, x, y) -> EVAL(-(x, 1), -(y, 1)) the following chains were created: 3.88/1.84 *We consider the chain EVAL(x[0], y[0]) -> COND_EVAL(&&(>(x[0], 0), >(y[0], 0)), x[0], y[0]), COND_EVAL(TRUE, x[1], y[1]) -> EVAL(-(x[1], 1), -(y[1], 1)), EVAL(x[0], y[0]) -> COND_EVAL(&&(>(x[0], 0), >(y[0], 0)), x[0], y[0]) which results in the following constraint: 3.88/1.84 3.88/1.84 (1) (&&(>(x[0], 0), >(y[0], 0))=TRUE & x[0]=x[1] & y[0]=y[1] & -(x[1], 1)=x[0]1 & -(y[1], 1)=y[0]1 ==> COND_EVAL(TRUE, x[1], y[1])_>=_NonInfC & COND_EVAL(TRUE, x[1], y[1])_>=_EVAL(-(x[1], 1), -(y[1], 1)) & (U^Increasing(EVAL(-(x[1], 1), -(y[1], 1))), >=)) 3.88/1.84 3.88/1.84 3.88/1.84 3.88/1.84 We simplified constraint (1) using rules (III), (IV), (IDP_BOOLEAN) which results in the following new constraint: 3.88/1.84 3.88/1.84 (2) (>(x[0], 0)=TRUE & >(y[0], 0)=TRUE ==> COND_EVAL(TRUE, x[0], y[0])_>=_NonInfC & COND_EVAL(TRUE, x[0], y[0])_>=_EVAL(-(x[0], 1), -(y[0], 1)) & (U^Increasing(EVAL(-(x[1], 1), -(y[1], 1))), >=)) 3.88/1.84 3.88/1.84 3.88/1.84 3.88/1.84 We simplified constraint (2) using rule (POLY_CONSTRAINTS) which results in the following new constraint: 3.88/1.84 3.88/1.84 (3) (x[0] + [-1] >= 0 & y[0] + [-1] >= 0 ==> (U^Increasing(EVAL(-(x[1], 1), -(y[1], 1))), >=) & [(-1)bni_14 + (-1)Bound*bni_14] + [bni_14]x[0] >= 0 & [1 + (-1)bso_15] >= 0) 3.88/1.84 3.88/1.84 3.88/1.84 3.88/1.84 We simplified constraint (3) using rule (IDP_POLY_SIMPLIFY) which results in the following new constraint: 3.88/1.84 3.88/1.84 (4) (x[0] + [-1] >= 0 & y[0] + [-1] >= 0 ==> (U^Increasing(EVAL(-(x[1], 1), -(y[1], 1))), >=) & [(-1)bni_14 + (-1)Bound*bni_14] + [bni_14]x[0] >= 0 & [1 + (-1)bso_15] >= 0) 3.88/1.84 3.88/1.84 3.88/1.84 3.88/1.84 We simplified constraint (4) using rule (POLY_REMOVE_MIN_MAX) which results in the following new constraint: 3.88/1.84 3.88/1.84 (5) (x[0] + [-1] >= 0 & y[0] + [-1] >= 0 ==> (U^Increasing(EVAL(-(x[1], 1), -(y[1], 1))), >=) & [(-1)bni_14 + (-1)Bound*bni_14] + [bni_14]x[0] >= 0 & [1 + (-1)bso_15] >= 0) 3.88/1.84 3.88/1.84 3.88/1.84 3.88/1.84 3.88/1.84 3.88/1.84 3.88/1.84 3.88/1.84 3.88/1.84 To summarize, we get the following constraints P__>=_ for the following pairs. 3.88/1.84 3.88/1.84 *EVAL(x, y) -> COND_EVAL(&&(>(x, 0), >(y, 0)), x, y) 3.88/1.84 3.88/1.84 *(x[0] + [-1] >= 0 & y[0] + [-1] >= 0 ==> (U^Increasing(COND_EVAL(&&(>(x[0], 0), >(y[0], 0)), x[0], y[0])), >=) & [(-1)bni_12 + (-1)Bound*bni_12] + [bni_12]x[0] >= 0 & [(-1)bso_13] >= 0) 3.88/1.84 3.88/1.84 3.88/1.84 3.88/1.84 3.88/1.84 *COND_EVAL(TRUE, x, y) -> EVAL(-(x, 1), -(y, 1)) 3.88/1.84 3.88/1.84 *(x[0] + [-1] >= 0 & y[0] + [-1] >= 0 ==> (U^Increasing(EVAL(-(x[1], 1), -(y[1], 1))), >=) & [(-1)bni_14 + (-1)Bound*bni_14] + [bni_14]x[0] >= 0 & [1 + (-1)bso_15] >= 0) 3.88/1.84 3.88/1.84 3.88/1.84 3.88/1.84 3.88/1.84 3.88/1.84 3.88/1.84 3.88/1.84 3.88/1.84 The constraints for P_> respective P_bound are constructed from P__>=_ where we just replace every occurence of "t _>=_ s" in P__>=_ by "t > s" respective "t _>=_ c". Here c stands for the fresh constant used for P_bound. 3.88/1.84 3.88/1.84 Using the following integer polynomial ordering the resulting constraints can be solved 3.88/1.84 3.88/1.84 Polynomial interpretation over integers[POLO]: 3.88/1.84 3.88/1.84 POL(TRUE) = 0 3.88/1.84 POL(FALSE) = [1] 3.88/1.84 POL(EVAL(x_1, x_2)) = [-1] + x_1 3.88/1.84 POL(COND_EVAL(x_1, x_2, x_3)) = [-1] + x_2 3.88/1.84 POL(&&(x_1, x_2)) = [-1] 3.88/1.84 POL(>(x_1, x_2)) = [-1] 3.88/1.84 POL(0) = 0 3.88/1.84 POL(-(x_1, x_2)) = x_1 + [-1]x_2 3.88/1.84 POL(1) = [1] 3.88/1.84 3.88/1.84 3.88/1.84 The following pairs are in P_>: 3.88/1.84 3.88/1.84 3.88/1.84 COND_EVAL(TRUE, x[1], y[1]) -> EVAL(-(x[1], 1), -(y[1], 1)) 3.88/1.84 3.88/1.84 3.88/1.84 The following pairs are in P_bound: 3.88/1.84 3.88/1.84 3.88/1.84 EVAL(x[0], y[0]) -> COND_EVAL(&&(>(x[0], 0), >(y[0], 0)), x[0], y[0]) 3.88/1.84 COND_EVAL(TRUE, x[1], y[1]) -> EVAL(-(x[1], 1), -(y[1], 1)) 3.88/1.84 3.88/1.84 3.88/1.84 The following pairs are in P_>=: 3.88/1.84 3.88/1.84 3.88/1.84 EVAL(x[0], y[0]) -> COND_EVAL(&&(>(x[0], 0), >(y[0], 0)), x[0], y[0]) 3.88/1.84 3.88/1.84 3.88/1.84 At least the following rules have been oriented under context sensitive arithmetic replacement: 3.88/1.84 3.88/1.84 TRUE^1 -> &&(TRUE, TRUE)^1 3.88/1.84 FALSE^1 -> &&(TRUE, FALSE)^1 3.88/1.84 FALSE^1 -> &&(FALSE, TRUE)^1 3.88/1.84 FALSE^1 -> &&(FALSE, FALSE)^1 3.88/1.84 3.88/1.84 ---------------------------------------- 3.88/1.84 3.88/1.84 (6) 3.88/1.84 Obligation: 3.88/1.84 IDP problem: 3.88/1.84 The following function symbols are pre-defined: 3.88/1.84 <<< 3.88/1.84 & ~ Bwand: (Integer, Integer) -> Integer 3.88/1.84 >= ~ Ge: (Integer, Integer) -> Boolean 3.88/1.84 | ~ Bwor: (Integer, Integer) -> Integer 3.88/1.84 / ~ Div: (Integer, Integer) -> Integer 3.88/1.84 != ~ Neq: (Integer, Integer) -> Boolean 3.88/1.84 && ~ Land: (Boolean, Boolean) -> Boolean 3.88/1.84 ! ~ Lnot: (Boolean) -> Boolean 3.88/1.84 = ~ Eq: (Integer, Integer) -> Boolean 3.88/1.84 <= ~ Le: (Integer, Integer) -> Boolean 3.88/1.84 ^ ~ Bwxor: (Integer, Integer) -> Integer 3.88/1.84 % ~ Mod: (Integer, Integer) -> Integer 3.88/1.84 > ~ Gt: (Integer, Integer) -> Boolean 3.88/1.84 + ~ Add: (Integer, Integer) -> Integer 3.88/1.84 -1 ~ UnaryMinus: (Integer) -> Integer 3.88/1.84 < ~ Lt: (Integer, Integer) -> Boolean 3.88/1.84 || ~ Lor: (Boolean, Boolean) -> Boolean 3.88/1.84 - ~ Sub: (Integer, Integer) -> Integer 3.88/1.84 ~ ~ Bwnot: (Integer) -> Integer 3.88/1.84 * ~ Mul: (Integer, Integer) -> Integer 3.88/1.84 >>> 3.88/1.84 3.88/1.84 3.88/1.84 The following domains are used: 3.88/1.84 Boolean, Integer 3.88/1.84 3.88/1.84 R is empty. 3.88/1.84 3.88/1.84 The integer pair graph contains the following rules and edges: 3.88/1.84 (0): EVAL(x[0], y[0]) -> COND_EVAL(x[0] > 0 && y[0] > 0, x[0], y[0]) 3.88/1.84 3.88/1.84 3.88/1.84 The set Q consists of the following terms: 3.88/1.84 eval(x0, x1) 3.88/1.84 Cond_eval(TRUE, x0, x1) 3.88/1.84 3.88/1.84 ---------------------------------------- 3.88/1.84 3.88/1.84 (7) IDependencyGraphProof (EQUIVALENT) 3.88/1.84 The approximation of the Dependency Graph [LPAR04,FROCOS05,EDGSTAR] contains 0 SCCs with 1 less node. 3.88/1.84 ---------------------------------------- 3.88/1.84 3.88/1.84 (8) 3.88/1.84 TRUE 3.88/1.86 EOF