(0) Obligation:

JBC Problem based on JBC Program:
Manifest-Version: 1.0 Created-By: 1.6.0_16 (Sun Microsystems Inc.) Main-Class: Mod
public class Mod {
public static void main(String[] args) {
int x = args[0].length();
int y = args[1].length();
mod(x, y);
}
public static int mod(int x, int y) {

while (x >= y && y > 0) {
x = minus(x,y);

}
return x;
}

public static int minus(int x, int y) {
while (y != 0) {
if (y > 0) {
y--;
x--;
} else {
y++;
x++;
}
}
return x;
}

}


(1) JBCToGraph (SOUND transformation)

Constructed TerminationGraph.

(2) Obligation:

Termination Graph based on JBC Program:
Mod.main([Ljava/lang/String;)V: Graph of 178 nodes with 1 SCC.


(3) TerminationGraphToSCCProof (SOUND transformation)

Splitted TerminationGraph to 1 SCCs.

(4) Obligation:

SCC of termination graph based on JBC Program.
SCC contains nodes from the following methods: Mod.main([Ljava/lang/String;)V
SCC calls the following helper methods:
Performed SCC analyses: UsedFieldsAnalysis

(5) SCCToIDPv1Proof (SOUND transformation)

Transformed FIGraph SCCs to IDPs. Log:

Generated 27 rules for P and 0 rules for R.


P rules:
508_0_mod_Load(EOS(STATIC_508), i84, i83, i84, i83) → 510_0_mod_LT(EOS(STATIC_510), i84, i83, i84, i83, i84)
510_0_mod_LT(EOS(STATIC_510), i84, i83, i84, i83, i84) → 513_0_mod_LT(EOS(STATIC_513), i84, i83, i84, i83, i84)
513_0_mod_LT(EOS(STATIC_513), i84, i83, i84, i83, i84) → 517_0_mod_Load(EOS(STATIC_517), i84, i83, i84) | >=(i83, i84)
517_0_mod_Load(EOS(STATIC_517), i84, i83, i84) → 521_0_mod_LE(EOS(STATIC_521), i84, i83, i84, i84)
521_0_mod_LE(EOS(STATIC_521), i90, i83, i90, i90) → 526_0_mod_LE(EOS(STATIC_526), i90, i83, i90, i90)
526_0_mod_LE(EOS(STATIC_526), i90, i83, i90, i90) → 533_0_mod_Load(EOS(STATIC_533), i90, i83, i90) | >(i90, 0)
533_0_mod_Load(EOS(STATIC_533), i90, i83, i90) → 540_0_mod_Load(EOS(STATIC_540), i90, i90, i83)
540_0_mod_Load(EOS(STATIC_540), i90, i90, i83) → 546_0_mod_InvokeMethod(EOS(STATIC_546), i90, i90, i83, i90)
546_0_mod_InvokeMethod(EOS(STATIC_546), i90, i90, i83, i90) → 550_0_minus_Load(EOS(STATIC_550), i90, i90, i83, i90, i83, i90)
550_0_minus_Load(EOS(STATIC_550), i90, i90, i83, i90, i83, i90) → 576_0_minus_Load(EOS(STATIC_576), i90, i90, i83, i90, i83, i90)
576_0_minus_Load(EOS(STATIC_576), i90, i90, i83, i90, i98, i99) → 580_0_minus_EQ(EOS(STATIC_580), i90, i90, i83, i90, i98, i99, i99)
580_0_minus_EQ(EOS(STATIC_580), i90, i90, i83, i90, i98, i106, i106) → 582_0_minus_EQ(EOS(STATIC_582), i90, i90, i83, i90, i98, i106, i106)
580_0_minus_EQ(EOS(STATIC_580), i90, i90, i83, i90, i98, matching1, matching2) → 583_0_minus_EQ(EOS(STATIC_583), i90, i90, i83, i90, i98, 0, 0) | &&(=(matching1, 0), =(matching2, 0))
582_0_minus_EQ(EOS(STATIC_582), i90, i90, i83, i90, i98, i106, i106) → 585_0_minus_Load(EOS(STATIC_585), i90, i90, i83, i90, i98, i106) | >(i106, 0)
585_0_minus_Load(EOS(STATIC_585), i90, i90, i83, i90, i98, i106) → 590_0_minus_LE(EOS(STATIC_590), i90, i90, i83, i90, i98, i106, i106)
590_0_minus_LE(EOS(STATIC_590), i90, i90, i83, i90, i98, i106, i106) → 594_0_minus_Inc(EOS(STATIC_594), i90, i90, i83, i90, i98, i106) | >(i106, 0)
594_0_minus_Inc(EOS(STATIC_594), i90, i90, i83, i90, i98, i106) → 598_0_minus_Inc(EOS(STATIC_598), i90, i90, i83, i90, i98, +(i106, -1)) | >(i106, 0)
598_0_minus_Inc(EOS(STATIC_598), i90, i90, i83, i90, i98, i107) → 603_0_minus_JMP(EOS(STATIC_603), i90, i90, i83, i90, +(i98, -1), i107)
603_0_minus_JMP(EOS(STATIC_603), i90, i90, i83, i90, i108, i107) → 623_0_minus_Load(EOS(STATIC_623), i90, i90, i83, i90, i108, i107)
623_0_minus_Load(EOS(STATIC_623), i90, i90, i83, i90, i108, i107) → 576_0_minus_Load(EOS(STATIC_576), i90, i90, i83, i90, i108, i107)
583_0_minus_EQ(EOS(STATIC_583), i90, i90, i83, i90, i98, matching1, matching2) → 588_0_minus_Load(EOS(STATIC_588), i90, i90, i83, i90, i98) | &&(=(matching1, 0), =(matching2, 0))
588_0_minus_Load(EOS(STATIC_588), i90, i90, i83, i90, i98) → 592_0_minus_Return(EOS(STATIC_592), i90, i90, i83, i90, i98)
592_0_minus_Return(EOS(STATIC_592), i90, i90, i83, i90, i98) → 596_0_mod_Store(EOS(STATIC_596), i90, i90, i98)
596_0_mod_Store(EOS(STATIC_596), i90, i90, i98) → 601_0_mod_JMP(EOS(STATIC_601), i90, i98, i90)
601_0_mod_JMP(EOS(STATIC_601), i90, i98, i90) → 618_0_mod_Load(EOS(STATIC_618), i90, i98, i90)
618_0_mod_Load(EOS(STATIC_618), i90, i98, i90) → 505_0_mod_Load(EOS(STATIC_505), i90, i98, i90)
505_0_mod_Load(EOS(STATIC_505), i84, i83, i84) → 508_0_mod_Load(EOS(STATIC_508), i84, i83, i84, i83)
R rules:

Combined rules. Obtained 2 conditional rules for P and 0 conditional rules for R.


P rules:
580_0_minus_EQ(EOS(STATIC_580), x0, x0, x1, x0, x2, x3, x3) → 580_0_minus_EQ(EOS(STATIC_580), x0, x0, x1, x0, +(x2, -1), +(x3, -1), +(x3, -1)) | >(x3, 0)
580_0_minus_EQ(EOS(STATIC_580), x0, x0, x1, x0, x2, 0, 0) → 580_0_minus_EQ(EOS(STATIC_580), x0, x0, x2, x0, x2, x0, x0) | &&(>=(x2, x0), >(x0, 0))
R rules:

Filtered ground terms:



580_0_minus_EQ(x1, x2, x3, x4, x5, x6, x7, x8) → 580_0_minus_EQ(x2, x3, x4, x5, x6, x7, x8)
EOS(x1) → EOS
Cond_580_0_minus_EQ1(x1, x2, x3, x4, x5, x6, x7, x8, x9) → Cond_580_0_minus_EQ1(x1, x3, x4, x5, x6, x7)
Cond_580_0_minus_EQ(x1, x2, x3, x4, x5, x6, x7, x8, x9) → Cond_580_0_minus_EQ(x1, x3, x4, x5, x6, x7, x8, x9)

Filtered duplicate args:



580_0_minus_EQ(x1, x2, x3, x4, x5, x6, x7) → 580_0_minus_EQ(x3, x4, x5, x7)
Cond_580_0_minus_EQ(x1, x2, x3, x4, x5, x6, x7, x8) → Cond_580_0_minus_EQ(x1, x4, x5, x6, x8)
Cond_580_0_minus_EQ1(x1, x2, x3, x4, x5, x6) → Cond_580_0_minus_EQ1(x1, x4, x5, x6)

Filtered unneeded arguments:



Cond_580_0_minus_EQ(x1, x2, x3, x4, x5) → Cond_580_0_minus_EQ(x1, x3, x4, x5)
580_0_minus_EQ(x1, x2, x3, x4) → 580_0_minus_EQ(x2, x3, x4)
Cond_580_0_minus_EQ1(x1, x2, x3, x4) → Cond_580_0_minus_EQ1(x1, x3, x4)

Combined rules. Obtained 2 conditional rules for P and 0 conditional rules for R.


P rules:
580_0_minus_EQ(x0, x2, x3) → 580_0_minus_EQ(x0, +(x2, -1), +(x3, -1)) | >(x3, 0)
580_0_minus_EQ(x0, x2, 0) → 580_0_minus_EQ(x0, x2, x0) | &&(>=(x2, x0), >(x0, 0))
R rules:

Finished conversion. Obtained 4 rules for P and 0 rules for R. System has predefined symbols.


P rules:
580_0_MINUS_EQ(x0, x2, x3) → COND_580_0_MINUS_EQ(>(x3, 0), x0, x2, x3)
COND_580_0_MINUS_EQ(TRUE, x0, x2, x3) → 580_0_MINUS_EQ(x0, +(x2, -1), +(x3, -1))
580_0_MINUS_EQ(x0, x2, 0) → COND_580_0_MINUS_EQ1(&&(>=(x2, x0), >(x0, 0)), x0, x2, 0)
COND_580_0_MINUS_EQ1(TRUE, x0, x2, 0) → 580_0_MINUS_EQ(x0, x2, x0)
R rules:

(6) Obligation:

IDP problem:
The following function symbols are pre-defined:
!=~Neq: (Integer, Integer) -> Boolean
*~Mul: (Integer, Integer) -> Integer
>=~Ge: (Integer, Integer) -> Boolean
-1~UnaryMinus: (Integer) -> Integer
|~Bwor: (Integer, Integer) -> Integer
/~Div: (Integer, Integer) -> Integer
=~Eq: (Integer, Integer) -> Boolean
~Bwxor: (Integer, Integer) -> Integer
||~Lor: (Boolean, Boolean) -> Boolean
!~Lnot: (Boolean) -> Boolean
<~Lt: (Integer, Integer) -> Boolean
-~Sub: (Integer, Integer) -> Integer
<=~Le: (Integer, Integer) -> Boolean
>~Gt: (Integer, Integer) -> Boolean
~~Bwnot: (Integer) -> Integer
%~Mod: (Integer, Integer) -> Integer
&~Bwand: (Integer, Integer) -> Integer
+~Add: (Integer, Integer) -> Integer
&&~Land: (Boolean, Boolean) -> Boolean


The following domains are used:

Integer, Boolean


R is empty.

The integer pair graph contains the following rules and edges:
(0): 580_0_MINUS_EQ(x0[0], x2[0], x3[0]) → COND_580_0_MINUS_EQ(x3[0] > 0, x0[0], x2[0], x3[0])
(1): COND_580_0_MINUS_EQ(TRUE, x0[1], x2[1], x3[1]) → 580_0_MINUS_EQ(x0[1], x2[1] + -1, x3[1] + -1)
(2): 580_0_MINUS_EQ(x0[2], x2[2], 0) → COND_580_0_MINUS_EQ1(x2[2] >= x0[2] && x0[2] > 0, x0[2], x2[2], 0)
(3): COND_580_0_MINUS_EQ1(TRUE, x0[3], x2[3], 0) → 580_0_MINUS_EQ(x0[3], x2[3], x0[3])

(0) -> (1), if (x3[0] > 0x0[0]* x0[1]x2[0]* x2[1]x3[0]* x3[1])


(1) -> (0), if (x0[1]* x0[0]x2[1] + -1* x2[0]x3[1] + -1* x3[0])


(1) -> (2), if (x0[1]* x0[2]x2[1] + -1* x2[2]x3[1] + -1* 0)


(2) -> (3), if (x2[2] >= x0[2] && x0[2] > 0x0[2]* x0[3]x2[2]* x2[3])


(3) -> (0), if (x0[3]* x0[0]x2[3]* x2[0]x0[3]* x3[0])


(3) -> (2), if (x0[3]* x0[2]x2[3]* x2[2]x0[3]* 0)



The set Q is empty.

(7) IDPNonInfProof (SOUND transformation)

Used the following options for this NonInfProof:
IDPGPoloSolver: Range: [(-1,2)] IsNat: false Interpretation Shape Heuristic: aprove.DPFramework.IDPProblem.Processors.nonInf.poly.IdpDefaultShapeHeuristic@2f2bbce3 Constraint Generator: NonInfConstraintGenerator: PathGenerator: MetricPathGenerator: Max Left Steps: 1 Max Right Steps: 1

The constraints were generated the following way:
The DP Problem is simplified using the Induction Calculus [NONINF] with the following steps:
Note that final constraints are written in bold face.


For Pair 580_0_MINUS_EQ(x0, x2, x3) → COND_580_0_MINUS_EQ(>(x3, 0), x0, x2, x3) the following chains were created:
  • We consider the chain 580_0_MINUS_EQ(x0[0], x2[0], x3[0]) → COND_580_0_MINUS_EQ(>(x3[0], 0), x0[0], x2[0], x3[0]), COND_580_0_MINUS_EQ(TRUE, x0[1], x2[1], x3[1]) → 580_0_MINUS_EQ(x0[1], +(x2[1], -1), +(x3[1], -1)) which results in the following constraint:

    (1)    (>(x3[0], 0)=TRUEx0[0]=x0[1]x2[0]=x2[1]x3[0]=x3[1]580_0_MINUS_EQ(x0[0], x2[0], x3[0])≥NonInfC∧580_0_MINUS_EQ(x0[0], x2[0], x3[0])≥COND_580_0_MINUS_EQ(>(x3[0], 0), x0[0], x2[0], x3[0])∧(UIncreasing(COND_580_0_MINUS_EQ(>(x3[0], 0), x0[0], x2[0], x3[0])), ≥))



    We simplified constraint (1) using rule (IV) which results in the following new constraint:

    (2)    (>(x3[0], 0)=TRUE580_0_MINUS_EQ(x0[0], x2[0], x3[0])≥NonInfC∧580_0_MINUS_EQ(x0[0], x2[0], x3[0])≥COND_580_0_MINUS_EQ(>(x3[0], 0), x0[0], x2[0], x3[0])∧(UIncreasing(COND_580_0_MINUS_EQ(>(x3[0], 0), x0[0], x2[0], x3[0])), ≥))



    We simplified constraint (2) using rule (POLY_CONSTRAINTS) which results in the following new constraint:

    (3)    (x3[0] + [-1] ≥ 0 ⇒ (UIncreasing(COND_580_0_MINUS_EQ(>(x3[0], 0), x0[0], x2[0], x3[0])), ≥)∧[(-1)bni_20 + (-1)Bound*bni_20] + [(-1)bni_20]x3[0] + [bni_20]x2[0] ≥ 0∧[(-1)bso_21] ≥ 0)



    We simplified constraint (3) using rule (IDP_POLY_SIMPLIFY) which results in the following new constraint:

    (4)    (x3[0] + [-1] ≥ 0 ⇒ (UIncreasing(COND_580_0_MINUS_EQ(>(x3[0], 0), x0[0], x2[0], x3[0])), ≥)∧[(-1)bni_20 + (-1)Bound*bni_20] + [(-1)bni_20]x3[0] + [bni_20]x2[0] ≥ 0∧[(-1)bso_21] ≥ 0)



    We simplified constraint (4) using rule (POLY_REMOVE_MIN_MAX) which results in the following new constraint:

    (5)    (x3[0] + [-1] ≥ 0 ⇒ (UIncreasing(COND_580_0_MINUS_EQ(>(x3[0], 0), x0[0], x2[0], x3[0])), ≥)∧[(-1)bni_20 + (-1)Bound*bni_20] + [(-1)bni_20]x3[0] + [bni_20]x2[0] ≥ 0∧[(-1)bso_21] ≥ 0)



    We simplified constraint (5) using rule (IDP_UNRESTRICTED_VARS) which results in the following new constraint:

    (6)    (x3[0] + [-1] ≥ 0 ⇒ (UIncreasing(COND_580_0_MINUS_EQ(>(x3[0], 0), x0[0], x2[0], x3[0])), ≥)∧[bni_20] = 0∧0 = 0∧[(-1)bni_20 + (-1)Bound*bni_20] + [(-1)bni_20]x3[0] ≥ 0∧0 = 0∧0 = 0∧[(-1)bso_21] ≥ 0)



    We simplified constraint (6) using rule (IDP_SMT_SPLIT) which results in the following new constraint:

    (7)    (x3[0] ≥ 0 ⇒ (UIncreasing(COND_580_0_MINUS_EQ(>(x3[0], 0), x0[0], x2[0], x3[0])), ≥)∧[bni_20] = 0∧0 = 0∧[(-2)bni_20 + (-1)Bound*bni_20] + [(-1)bni_20]x3[0] ≥ 0∧0 = 0∧0 = 0∧[(-1)bso_21] ≥ 0)







For Pair COND_580_0_MINUS_EQ(TRUE, x0, x2, x3) → 580_0_MINUS_EQ(x0, +(x2, -1), +(x3, -1)) the following chains were created:
  • We consider the chain 580_0_MINUS_EQ(x0[0], x2[0], x3[0]) → COND_580_0_MINUS_EQ(>(x3[0], 0), x0[0], x2[0], x3[0]), COND_580_0_MINUS_EQ(TRUE, x0[1], x2[1], x3[1]) → 580_0_MINUS_EQ(x0[1], +(x2[1], -1), +(x3[1], -1)), 580_0_MINUS_EQ(x0[0], x2[0], x3[0]) → COND_580_0_MINUS_EQ(>(x3[0], 0), x0[0], x2[0], x3[0]) which results in the following constraint:

    (8)    (>(x3[0], 0)=TRUEx0[0]=x0[1]x2[0]=x2[1]x3[0]=x3[1]x0[1]=x0[0]1+(x2[1], -1)=x2[0]1+(x3[1], -1)=x3[0]1COND_580_0_MINUS_EQ(TRUE, x0[1], x2[1], x3[1])≥NonInfC∧COND_580_0_MINUS_EQ(TRUE, x0[1], x2[1], x3[1])≥580_0_MINUS_EQ(x0[1], +(x2[1], -1), +(x3[1], -1))∧(UIncreasing(580_0_MINUS_EQ(x0[1], +(x2[1], -1), +(x3[1], -1))), ≥))



    We simplified constraint (8) using rules (III), (IV) which results in the following new constraint:

    (9)    (>(x3[0], 0)=TRUECOND_580_0_MINUS_EQ(TRUE, x0[0], x2[0], x3[0])≥NonInfC∧COND_580_0_MINUS_EQ(TRUE, x0[0], x2[0], x3[0])≥580_0_MINUS_EQ(x0[0], +(x2[0], -1), +(x3[0], -1))∧(UIncreasing(580_0_MINUS_EQ(x0[1], +(x2[1], -1), +(x3[1], -1))), ≥))



    We simplified constraint (9) using rule (POLY_CONSTRAINTS) which results in the following new constraint:

    (10)    (x3[0] + [-1] ≥ 0 ⇒ (UIncreasing(580_0_MINUS_EQ(x0[1], +(x2[1], -1), +(x3[1], -1))), ≥)∧[(-1)bni_22 + (-1)Bound*bni_22] + [(-1)bni_22]x3[0] + [bni_22]x2[0] ≥ 0∧[(-1)bso_23] ≥ 0)



    We simplified constraint (10) using rule (IDP_POLY_SIMPLIFY) which results in the following new constraint:

    (11)    (x3[0] + [-1] ≥ 0 ⇒ (UIncreasing(580_0_MINUS_EQ(x0[1], +(x2[1], -1), +(x3[1], -1))), ≥)∧[(-1)bni_22 + (-1)Bound*bni_22] + [(-1)bni_22]x3[0] + [bni_22]x2[0] ≥ 0∧[(-1)bso_23] ≥ 0)



    We simplified constraint (11) using rule (POLY_REMOVE_MIN_MAX) which results in the following new constraint:

    (12)    (x3[0] + [-1] ≥ 0 ⇒ (UIncreasing(580_0_MINUS_EQ(x0[1], +(x2[1], -1), +(x3[1], -1))), ≥)∧[(-1)bni_22 + (-1)Bound*bni_22] + [(-1)bni_22]x3[0] + [bni_22]x2[0] ≥ 0∧[(-1)bso_23] ≥ 0)



    We simplified constraint (12) using rule (IDP_UNRESTRICTED_VARS) which results in the following new constraint:

    (13)    (x3[0] + [-1] ≥ 0 ⇒ (UIncreasing(580_0_MINUS_EQ(x0[1], +(x2[1], -1), +(x3[1], -1))), ≥)∧[bni_22] = 0∧0 = 0∧[(-1)bni_22 + (-1)Bound*bni_22] + [(-1)bni_22]x3[0] ≥ 0∧0 = 0∧0 = 0∧[(-1)bso_23] ≥ 0)



    We simplified constraint (13) using rule (IDP_SMT_SPLIT) which results in the following new constraint:

    (14)    (x3[0] ≥ 0 ⇒ (UIncreasing(580_0_MINUS_EQ(x0[1], +(x2[1], -1), +(x3[1], -1))), ≥)∧[bni_22] = 0∧0 = 0∧[(-2)bni_22 + (-1)Bound*bni_22] + [(-1)bni_22]x3[0] ≥ 0∧0 = 0∧0 = 0∧[(-1)bso_23] ≥ 0)



  • We consider the chain 580_0_MINUS_EQ(x0[0], x2[0], x3[0]) → COND_580_0_MINUS_EQ(>(x3[0], 0), x0[0], x2[0], x3[0]), COND_580_0_MINUS_EQ(TRUE, x0[1], x2[1], x3[1]) → 580_0_MINUS_EQ(x0[1], +(x2[1], -1), +(x3[1], -1)), 580_0_MINUS_EQ(x0[2], x2[2], 0) → COND_580_0_MINUS_EQ1(&&(>=(x2[2], x0[2]), >(x0[2], 0)), x0[2], x2[2], 0) which results in the following constraint:

    (15)    (>(x3[0], 0)=TRUEx0[0]=x0[1]x2[0]=x2[1]x3[0]=x3[1]x0[1]=x0[2]+(x2[1], -1)=x2[2]+(x3[1], -1)=0COND_580_0_MINUS_EQ(TRUE, x0[1], x2[1], x3[1])≥NonInfC∧COND_580_0_MINUS_EQ(TRUE, x0[1], x2[1], x3[1])≥580_0_MINUS_EQ(x0[1], +(x2[1], -1), +(x3[1], -1))∧(UIncreasing(580_0_MINUS_EQ(x0[1], +(x2[1], -1), +(x3[1], -1))), ≥))



    We simplified constraint (15) using rules (III), (IV) which results in the following new constraint:

    (16)    (>(x3[0], 0)=TRUE+(x3[0], -1)=0COND_580_0_MINUS_EQ(TRUE, x0[0], x2[0], x3[0])≥NonInfC∧COND_580_0_MINUS_EQ(TRUE, x0[0], x2[0], x3[0])≥580_0_MINUS_EQ(x0[0], +(x2[0], -1), +(x3[0], -1))∧(UIncreasing(580_0_MINUS_EQ(x0[1], +(x2[1], -1), +(x3[1], -1))), ≥))



    We simplified constraint (16) using rule (POLY_CONSTRAINTS) which results in the following new constraint:

    (17)    (x3[0] + [-1] ≥ 0∧x3[0] + [-1] ≥ 0 ⇒ (UIncreasing(580_0_MINUS_EQ(x0[1], +(x2[1], -1), +(x3[1], -1))), ≥)∧[(-1)bni_22 + (-1)Bound*bni_22] + [(-1)bni_22]x3[0] + [bni_22]x2[0] ≥ 0∧[(-1)bso_23] ≥ 0)



    We simplified constraint (17) using rule (IDP_POLY_SIMPLIFY) which results in the following new constraint:

    (18)    (x3[0] + [-1] ≥ 0∧x3[0] + [-1] ≥ 0 ⇒ (UIncreasing(580_0_MINUS_EQ(x0[1], +(x2[1], -1), +(x3[1], -1))), ≥)∧[(-1)bni_22 + (-1)Bound*bni_22] + [(-1)bni_22]x3[0] + [bni_22]x2[0] ≥ 0∧[(-1)bso_23] ≥ 0)



    We simplified constraint (18) using rule (POLY_REMOVE_MIN_MAX) which results in the following new constraint:

    (19)    (x3[0] + [-1] ≥ 0∧x3[0] + [-1] ≥ 0 ⇒ (UIncreasing(580_0_MINUS_EQ(x0[1], +(x2[1], -1), +(x3[1], -1))), ≥)∧[(-1)bni_22 + (-1)Bound*bni_22] + [(-1)bni_22]x3[0] + [bni_22]x2[0] ≥ 0∧[(-1)bso_23] ≥ 0)



    We simplified constraint (19) using rule (IDP_UNRESTRICTED_VARS) which results in the following new constraint:

    (20)    (x3[0] + [-1] ≥ 0∧x3[0] + [-1] ≥ 0 ⇒ (UIncreasing(580_0_MINUS_EQ(x0[1], +(x2[1], -1), +(x3[1], -1))), ≥)∧[bni_22] = 0∧0 = 0∧[(-1)bni_22 + (-1)Bound*bni_22] + [(-1)bni_22]x3[0] ≥ 0∧0 = 0∧0 = 0∧[(-1)bso_23] ≥ 0)



    We simplified constraint (20) using rule (IDP_SMT_SPLIT) which results in the following new constraint:

    (21)    (x3[0] ≥ 0∧x3[0] ≥ 0 ⇒ (UIncreasing(580_0_MINUS_EQ(x0[1], +(x2[1], -1), +(x3[1], -1))), ≥)∧[bni_22] = 0∧0 = 0∧[(-2)bni_22 + (-1)Bound*bni_22] + [(-1)bni_22]x3[0] ≥ 0∧0 = 0∧0 = 0∧[(-1)bso_23] ≥ 0)







For Pair 580_0_MINUS_EQ(x0, x2, 0) → COND_580_0_MINUS_EQ1(&&(>=(x2, x0), >(x0, 0)), x0, x2, 0) the following chains were created:
  • We consider the chain 580_0_MINUS_EQ(x0[2], x2[2], 0) → COND_580_0_MINUS_EQ1(&&(>=(x2[2], x0[2]), >(x0[2], 0)), x0[2], x2[2], 0), COND_580_0_MINUS_EQ1(TRUE, x0[3], x2[3], 0) → 580_0_MINUS_EQ(x0[3], x2[3], x0[3]) which results in the following constraint:

    (22)    (&&(>=(x2[2], x0[2]), >(x0[2], 0))=TRUEx0[2]=x0[3]x2[2]=x2[3]580_0_MINUS_EQ(x0[2], x2[2], 0)≥NonInfC∧580_0_MINUS_EQ(x0[2], x2[2], 0)≥COND_580_0_MINUS_EQ1(&&(>=(x2[2], x0[2]), >(x0[2], 0)), x0[2], x2[2], 0)∧(UIncreasing(COND_580_0_MINUS_EQ1(&&(>=(x2[2], x0[2]), >(x0[2], 0)), x0[2], x2[2], 0)), ≥))



    We simplified constraint (22) using rules (IV), (IDP_BOOLEAN) which results in the following new constraint:

    (23)    (>=(x2[2], x0[2])=TRUE>(x0[2], 0)=TRUE580_0_MINUS_EQ(x0[2], x2[2], 0)≥NonInfC∧580_0_MINUS_EQ(x0[2], x2[2], 0)≥COND_580_0_MINUS_EQ1(&&(>=(x2[2], x0[2]), >(x0[2], 0)), x0[2], x2[2], 0)∧(UIncreasing(COND_580_0_MINUS_EQ1(&&(>=(x2[2], x0[2]), >(x0[2], 0)), x0[2], x2[2], 0)), ≥))



    We simplified constraint (23) using rule (POLY_CONSTRAINTS) which results in the following new constraint:

    (24)    (x2[2] + [-1]x0[2] ≥ 0∧x0[2] + [-1] ≥ 0 ⇒ (UIncreasing(COND_580_0_MINUS_EQ1(&&(>=(x2[2], x0[2]), >(x0[2], 0)), x0[2], x2[2], 0)), ≥)∧[(-1)bni_24 + (-1)Bound*bni_24] + [bni_24]x2[2] ≥ 0∧[(-1)bso_25] + x0[2] ≥ 0)



    We simplified constraint (24) using rule (IDP_POLY_SIMPLIFY) which results in the following new constraint:

    (25)    (x2[2] + [-1]x0[2] ≥ 0∧x0[2] + [-1] ≥ 0 ⇒ (UIncreasing(COND_580_0_MINUS_EQ1(&&(>=(x2[2], x0[2]), >(x0[2], 0)), x0[2], x2[2], 0)), ≥)∧[(-1)bni_24 + (-1)Bound*bni_24] + [bni_24]x2[2] ≥ 0∧[(-1)bso_25] + x0[2] ≥ 0)



    We simplified constraint (25) using rule (POLY_REMOVE_MIN_MAX) which results in the following new constraint:

    (26)    (x2[2] + [-1]x0[2] ≥ 0∧x0[2] + [-1] ≥ 0 ⇒ (UIncreasing(COND_580_0_MINUS_EQ1(&&(>=(x2[2], x0[2]), >(x0[2], 0)), x0[2], x2[2], 0)), ≥)∧[(-1)bni_24 + (-1)Bound*bni_24] + [bni_24]x2[2] ≥ 0∧[(-1)bso_25] + x0[2] ≥ 0)



    We simplified constraint (26) using rule (IDP_SMT_SPLIT) which results in the following new constraint:

    (27)    (x2[2] ≥ 0∧x0[2] + [-1] ≥ 0 ⇒ (UIncreasing(COND_580_0_MINUS_EQ1(&&(>=(x2[2], x0[2]), >(x0[2], 0)), x0[2], x2[2], 0)), ≥)∧[(-1)bni_24 + (-1)Bound*bni_24] + [bni_24]x0[2] + [bni_24]x2[2] ≥ 0∧[(-1)bso_25] + x0[2] ≥ 0)



    We simplified constraint (27) using rule (IDP_SMT_SPLIT) which results in the following new constraint:

    (28)    (x2[2] ≥ 0∧x0[2] ≥ 0 ⇒ (UIncreasing(COND_580_0_MINUS_EQ1(&&(>=(x2[2], x0[2]), >(x0[2], 0)), x0[2], x2[2], 0)), ≥)∧[(-1)Bound*bni_24] + [bni_24]x0[2] + [bni_24]x2[2] ≥ 0∧[1 + (-1)bso_25] + x0[2] ≥ 0)







For Pair COND_580_0_MINUS_EQ1(TRUE, x0, x2, 0) → 580_0_MINUS_EQ(x0, x2, x0) the following chains were created:
  • We consider the chain COND_580_0_MINUS_EQ1(TRUE, x0[3], x2[3], 0) → 580_0_MINUS_EQ(x0[3], x2[3], x0[3]), 580_0_MINUS_EQ(x0[0], x2[0], x3[0]) → COND_580_0_MINUS_EQ(>(x3[0], 0), x0[0], x2[0], x3[0]) which results in the following constraint:

    (29)    (x0[3]=x0[0]x2[3]=x2[0]x0[3]=x3[0]COND_580_0_MINUS_EQ1(TRUE, x0[3], x2[3], 0)≥NonInfC∧COND_580_0_MINUS_EQ1(TRUE, x0[3], x2[3], 0)≥580_0_MINUS_EQ(x0[3], x2[3], x0[3])∧(UIncreasing(580_0_MINUS_EQ(x0[3], x2[3], x0[3])), ≥))



    We simplified constraint (29) using rule (IV) which results in the following new constraint:

    (30)    (COND_580_0_MINUS_EQ1(TRUE, x0[3], x2[3], 0)≥NonInfC∧COND_580_0_MINUS_EQ1(TRUE, x0[3], x2[3], 0)≥580_0_MINUS_EQ(x0[3], x2[3], x0[3])∧(UIncreasing(580_0_MINUS_EQ(x0[3], x2[3], x0[3])), ≥))



    We simplified constraint (30) using rule (POLY_CONSTRAINTS) which results in the following new constraint:

    (31)    ((UIncreasing(580_0_MINUS_EQ(x0[3], x2[3], x0[3])), ≥)∧[bni_26] = 0∧[(-1)bso_27] ≥ 0)



    We simplified constraint (31) using rule (IDP_POLY_SIMPLIFY) which results in the following new constraint:

    (32)    ((UIncreasing(580_0_MINUS_EQ(x0[3], x2[3], x0[3])), ≥)∧[bni_26] = 0∧[(-1)bso_27] ≥ 0)



    We simplified constraint (32) using rule (POLY_REMOVE_MIN_MAX) which results in the following new constraint:

    (33)    ((UIncreasing(580_0_MINUS_EQ(x0[3], x2[3], x0[3])), ≥)∧[bni_26] = 0∧[(-1)bso_27] ≥ 0)



    We simplified constraint (33) using rule (IDP_UNRESTRICTED_VARS) which results in the following new constraint:

    (34)    ((UIncreasing(580_0_MINUS_EQ(x0[3], x2[3], x0[3])), ≥)∧[bni_26] = 0∧0 = 0∧0 = 0∧[(-1)bso_27] ≥ 0)



  • We consider the chain COND_580_0_MINUS_EQ1(TRUE, x0[3], x2[3], 0) → 580_0_MINUS_EQ(x0[3], x2[3], x0[3]), 580_0_MINUS_EQ(x0[2], x2[2], 0) → COND_580_0_MINUS_EQ1(&&(>=(x2[2], x0[2]), >(x0[2], 0)), x0[2], x2[2], 0) which results in the following constraint:

    (35)    (x0[3]=x0[2]x2[3]=x2[2]x0[3]=0COND_580_0_MINUS_EQ1(TRUE, x0[3], x2[3], 0)≥NonInfC∧COND_580_0_MINUS_EQ1(TRUE, x0[3], x2[3], 0)≥580_0_MINUS_EQ(x0[3], x2[3], x0[3])∧(UIncreasing(580_0_MINUS_EQ(x0[3], x2[3], x0[3])), ≥))



    We simplified constraint (35) using rules (III), (IV) which results in the following new constraint:

    (36)    (COND_580_0_MINUS_EQ1(TRUE, 0, x2[3], 0)≥NonInfC∧COND_580_0_MINUS_EQ1(TRUE, 0, x2[3], 0)≥580_0_MINUS_EQ(0, x2[3], 0)∧(UIncreasing(580_0_MINUS_EQ(x0[3], x2[3], x0[3])), ≥))



    We simplified constraint (36) using rule (POLY_CONSTRAINTS) which results in the following new constraint:

    (37)    ((UIncreasing(580_0_MINUS_EQ(x0[3], x2[3], x0[3])), ≥)∧[bni_26] = 0∧[(-1)bso_27] ≥ 0)



    We simplified constraint (37) using rule (IDP_POLY_SIMPLIFY) which results in the following new constraint:

    (38)    ((UIncreasing(580_0_MINUS_EQ(x0[3], x2[3], x0[3])), ≥)∧[bni_26] = 0∧[(-1)bso_27] ≥ 0)



    We simplified constraint (38) using rule (POLY_REMOVE_MIN_MAX) which results in the following new constraint:

    (39)    ((UIncreasing(580_0_MINUS_EQ(x0[3], x2[3], x0[3])), ≥)∧[bni_26] = 0∧[(-1)bso_27] ≥ 0)



    We simplified constraint (39) using rule (IDP_UNRESTRICTED_VARS) which results in the following new constraint:

    (40)    ((UIncreasing(580_0_MINUS_EQ(x0[3], x2[3], x0[3])), ≥)∧[bni_26] = 0∧0 = 0∧[(-1)bso_27] ≥ 0)







To summarize, we get the following constraints P for the following pairs.
  • 580_0_MINUS_EQ(x0, x2, x3) → COND_580_0_MINUS_EQ(>(x3, 0), x0, x2, x3)
    • (x3[0] ≥ 0 ⇒ (UIncreasing(COND_580_0_MINUS_EQ(>(x3[0], 0), x0[0], x2[0], x3[0])), ≥)∧[bni_20] = 0∧0 = 0∧[(-2)bni_20 + (-1)Bound*bni_20] + [(-1)bni_20]x3[0] ≥ 0∧0 = 0∧0 = 0∧[(-1)bso_21] ≥ 0)

  • COND_580_0_MINUS_EQ(TRUE, x0, x2, x3) → 580_0_MINUS_EQ(x0, +(x2, -1), +(x3, -1))
    • (x3[0] ≥ 0 ⇒ (UIncreasing(580_0_MINUS_EQ(x0[1], +(x2[1], -1), +(x3[1], -1))), ≥)∧[bni_22] = 0∧0 = 0∧[(-2)bni_22 + (-1)Bound*bni_22] + [(-1)bni_22]x3[0] ≥ 0∧0 = 0∧0 = 0∧[(-1)bso_23] ≥ 0)
    • (x3[0] ≥ 0∧x3[0] ≥ 0 ⇒ (UIncreasing(580_0_MINUS_EQ(x0[1], +(x2[1], -1), +(x3[1], -1))), ≥)∧[bni_22] = 0∧0 = 0∧[(-2)bni_22 + (-1)Bound*bni_22] + [(-1)bni_22]x3[0] ≥ 0∧0 = 0∧0 = 0∧[(-1)bso_23] ≥ 0)

  • 580_0_MINUS_EQ(x0, x2, 0) → COND_580_0_MINUS_EQ1(&&(>=(x2, x0), >(x0, 0)), x0, x2, 0)
    • (x2[2] ≥ 0∧x0[2] ≥ 0 ⇒ (UIncreasing(COND_580_0_MINUS_EQ1(&&(>=(x2[2], x0[2]), >(x0[2], 0)), x0[2], x2[2], 0)), ≥)∧[(-1)Bound*bni_24] + [bni_24]x0[2] + [bni_24]x2[2] ≥ 0∧[1 + (-1)bso_25] + x0[2] ≥ 0)

  • COND_580_0_MINUS_EQ1(TRUE, x0, x2, 0) → 580_0_MINUS_EQ(x0, x2, x0)
    • ((UIncreasing(580_0_MINUS_EQ(x0[3], x2[3], x0[3])), ≥)∧[bni_26] = 0∧0 = 0∧0 = 0∧[(-1)bso_27] ≥ 0)
    • ((UIncreasing(580_0_MINUS_EQ(x0[3], x2[3], x0[3])), ≥)∧[bni_26] = 0∧0 = 0∧[(-1)bso_27] ≥ 0)




The constraints for P> respective Pbound 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 Pbound.
Using the following integer polynomial ordering the resulting constraints can be solved
Polynomial interpretation over integers[POLO]:

POL(TRUE) = 0   
POL(FALSE) = [3]   
POL(580_0_MINUS_EQ(x1, x2, x3)) = [-1] + [-1]x3 + x2   
POL(COND_580_0_MINUS_EQ(x1, x2, x3, x4)) = [-1] + [-1]x4 + x3   
POL(>(x1, x2)) = [-1]   
POL(0) = 0   
POL(+(x1, x2)) = x1 + x2   
POL(-1) = [-1]   
POL(COND_580_0_MINUS_EQ1(x1, x2, x3, x4)) = [-1] + [-1]x4 + x3 + [-1]x2   
POL(&&(x1, x2)) = [-1]   
POL(>=(x1, x2)) = [-1]   

The following pairs are in P>:

580_0_MINUS_EQ(x0[2], x2[2], 0) → COND_580_0_MINUS_EQ1(&&(>=(x2[2], x0[2]), >(x0[2], 0)), x0[2], x2[2], 0)

The following pairs are in Pbound:

580_0_MINUS_EQ(x0[2], x2[2], 0) → COND_580_0_MINUS_EQ1(&&(>=(x2[2], x0[2]), >(x0[2], 0)), x0[2], x2[2], 0)

The following pairs are in P:

580_0_MINUS_EQ(x0[0], x2[0], x3[0]) → COND_580_0_MINUS_EQ(>(x3[0], 0), x0[0], x2[0], x3[0])
COND_580_0_MINUS_EQ(TRUE, x0[1], x2[1], x3[1]) → 580_0_MINUS_EQ(x0[1], +(x2[1], -1), +(x3[1], -1))
COND_580_0_MINUS_EQ1(TRUE, x0[3], x2[3], 0) → 580_0_MINUS_EQ(x0[3], x2[3], x0[3])

At least the following rules have been oriented under context sensitive arithmetic replacement:

TRUE1&&(TRUE, TRUE)1
FALSE1&&(FALSE, TRUE)1

(8) Obligation:

IDP problem:
The following function symbols are pre-defined:
!=~Neq: (Integer, Integer) -> Boolean
*~Mul: (Integer, Integer) -> Integer
>=~Ge: (Integer, Integer) -> Boolean
-1~UnaryMinus: (Integer) -> Integer
|~Bwor: (Integer, Integer) -> Integer
/~Div: (Integer, Integer) -> Integer
=~Eq: (Integer, Integer) -> Boolean
~Bwxor: (Integer, Integer) -> Integer
||~Lor: (Boolean, Boolean) -> Boolean
!~Lnot: (Boolean) -> Boolean
<~Lt: (Integer, Integer) -> Boolean
-~Sub: (Integer, Integer) -> Integer
<=~Le: (Integer, Integer) -> Boolean
>~Gt: (Integer, Integer) -> Boolean
~~Bwnot: (Integer) -> Integer
%~Mod: (Integer, Integer) -> Integer
&~Bwand: (Integer, Integer) -> Integer
+~Add: (Integer, Integer) -> Integer
&&~Land: (Boolean, Boolean) -> Boolean


The following domains are used:

Integer


R is empty.

The integer pair graph contains the following rules and edges:
(0): 580_0_MINUS_EQ(x0[0], x2[0], x3[0]) → COND_580_0_MINUS_EQ(x3[0] > 0, x0[0], x2[0], x3[0])
(1): COND_580_0_MINUS_EQ(TRUE, x0[1], x2[1], x3[1]) → 580_0_MINUS_EQ(x0[1], x2[1] + -1, x3[1] + -1)
(3): COND_580_0_MINUS_EQ1(TRUE, x0[3], x2[3], 0) → 580_0_MINUS_EQ(x0[3], x2[3], x0[3])

(1) -> (0), if (x0[1]* x0[0]x2[1] + -1* x2[0]x3[1] + -1* x3[0])


(3) -> (0), if (x0[3]* x0[0]x2[3]* x2[0]x0[3]* x3[0])


(0) -> (1), if (x3[0] > 0x0[0]* x0[1]x2[0]* x2[1]x3[0]* x3[1])



The set Q is empty.

(9) IDependencyGraphProof (EQUIVALENT transformation)

The approximation of the Dependency Graph [LPAR04,FROCOS05,EDGSTAR] contains 1 SCC with 1 less node.

(10) Obligation:

IDP problem:
The following function symbols are pre-defined:
!=~Neq: (Integer, Integer) -> Boolean
*~Mul: (Integer, Integer) -> Integer
>=~Ge: (Integer, Integer) -> Boolean
-1~UnaryMinus: (Integer) -> Integer
|~Bwor: (Integer, Integer) -> Integer
/~Div: (Integer, Integer) -> Integer
=~Eq: (Integer, Integer) -> Boolean
~Bwxor: (Integer, Integer) -> Integer
||~Lor: (Boolean, Boolean) -> Boolean
!~Lnot: (Boolean) -> Boolean
<~Lt: (Integer, Integer) -> Boolean
-~Sub: (Integer, Integer) -> Integer
<=~Le: (Integer, Integer) -> Boolean
>~Gt: (Integer, Integer) -> Boolean
~~Bwnot: (Integer) -> Integer
%~Mod: (Integer, Integer) -> Integer
&~Bwand: (Integer, Integer) -> Integer
+~Add: (Integer, Integer) -> Integer
&&~Land: (Boolean, Boolean) -> Boolean


The following domains are used:

Integer


R is empty.

The integer pair graph contains the following rules and edges:
(1): COND_580_0_MINUS_EQ(TRUE, x0[1], x2[1], x3[1]) → 580_0_MINUS_EQ(x0[1], x2[1] + -1, x3[1] + -1)
(0): 580_0_MINUS_EQ(x0[0], x2[0], x3[0]) → COND_580_0_MINUS_EQ(x3[0] > 0, x0[0], x2[0], x3[0])

(1) -> (0), if (x0[1]* x0[0]x2[1] + -1* x2[0]x3[1] + -1* x3[0])


(0) -> (1), if (x3[0] > 0x0[0]* x0[1]x2[0]* x2[1]x3[0]* x3[1])



The set Q is empty.

(11) IDPNonInfProof (SOUND transformation)

Used the following options for this NonInfProof:
IDPGPoloSolver: Range: [(-1,2)] IsNat: false Interpretation Shape Heuristic: aprove.DPFramework.IDPProblem.Processors.nonInf.poly.IdpDefaultShapeHeuristic@2f2bbce3 Constraint Generator: NonInfConstraintGenerator: PathGenerator: MetricPathGenerator: Max Left Steps: 1 Max Right Steps: 1

The constraints were generated the following way:
The DP Problem is simplified using the Induction Calculus [NONINF] with the following steps:
Note that final constraints are written in bold face.


For Pair COND_580_0_MINUS_EQ(TRUE, x0[1], x2[1], x3[1]) → 580_0_MINUS_EQ(x0[1], +(x2[1], -1), +(x3[1], -1)) the following chains were created:
  • We consider the chain 580_0_MINUS_EQ(x0[0], x2[0], x3[0]) → COND_580_0_MINUS_EQ(>(x3[0], 0), x0[0], x2[0], x3[0]), COND_580_0_MINUS_EQ(TRUE, x0[1], x2[1], x3[1]) → 580_0_MINUS_EQ(x0[1], +(x2[1], -1), +(x3[1], -1)), 580_0_MINUS_EQ(x0[0], x2[0], x3[0]) → COND_580_0_MINUS_EQ(>(x3[0], 0), x0[0], x2[0], x3[0]) which results in the following constraint:

    (1)    (>(x3[0], 0)=TRUEx0[0]=x0[1]x2[0]=x2[1]x3[0]=x3[1]x0[1]=x0[0]1+(x2[1], -1)=x2[0]1+(x3[1], -1)=x3[0]1COND_580_0_MINUS_EQ(TRUE, x0[1], x2[1], x3[1])≥NonInfC∧COND_580_0_MINUS_EQ(TRUE, x0[1], x2[1], x3[1])≥580_0_MINUS_EQ(x0[1], +(x2[1], -1), +(x3[1], -1))∧(UIncreasing(580_0_MINUS_EQ(x0[1], +(x2[1], -1), +(x3[1], -1))), ≥))



    We simplified constraint (1) using rules (III), (IV) which results in the following new constraint:

    (2)    (>(x3[0], 0)=TRUECOND_580_0_MINUS_EQ(TRUE, x0[0], x2[0], x3[0])≥NonInfC∧COND_580_0_MINUS_EQ(TRUE, x0[0], x2[0], x3[0])≥580_0_MINUS_EQ(x0[0], +(x2[0], -1), +(x3[0], -1))∧(UIncreasing(580_0_MINUS_EQ(x0[1], +(x2[1], -1), +(x3[1], -1))), ≥))



    We simplified constraint (2) using rule (POLY_CONSTRAINTS) which results in the following new constraint:

    (3)    (x3[0] + [-1] ≥ 0 ⇒ (UIncreasing(580_0_MINUS_EQ(x0[1], +(x2[1], -1), +(x3[1], -1))), ≥)∧[(-1)bni_13 + (-1)Bound*bni_13] + [bni_13]x3[0] ≥ 0∧[1 + (-1)bso_14] ≥ 0)



    We simplified constraint (3) using rule (IDP_POLY_SIMPLIFY) which results in the following new constraint:

    (4)    (x3[0] + [-1] ≥ 0 ⇒ (UIncreasing(580_0_MINUS_EQ(x0[1], +(x2[1], -1), +(x3[1], -1))), ≥)∧[(-1)bni_13 + (-1)Bound*bni_13] + [bni_13]x3[0] ≥ 0∧[1 + (-1)bso_14] ≥ 0)



    We simplified constraint (4) using rule (POLY_REMOVE_MIN_MAX) which results in the following new constraint:

    (5)    (x3[0] + [-1] ≥ 0 ⇒ (UIncreasing(580_0_MINUS_EQ(x0[1], +(x2[1], -1), +(x3[1], -1))), ≥)∧[(-1)bni_13 + (-1)Bound*bni_13] + [bni_13]x3[0] ≥ 0∧[1 + (-1)bso_14] ≥ 0)



    We simplified constraint (5) using rule (IDP_UNRESTRICTED_VARS) which results in the following new constraint:

    (6)    (x3[0] + [-1] ≥ 0 ⇒ (UIncreasing(580_0_MINUS_EQ(x0[1], +(x2[1], -1), +(x3[1], -1))), ≥)∧0 = 0∧0 = 0∧[(-1)bni_13 + (-1)Bound*bni_13] + [bni_13]x3[0] ≥ 0∧0 = 0∧0 = 0∧[1 + (-1)bso_14] ≥ 0)



    We simplified constraint (6) using rule (IDP_SMT_SPLIT) which results in the following new constraint:

    (7)    (x3[0] ≥ 0 ⇒ (UIncreasing(580_0_MINUS_EQ(x0[1], +(x2[1], -1), +(x3[1], -1))), ≥)∧0 = 0∧0 = 0∧[(-1)Bound*bni_13] + [bni_13]x3[0] ≥ 0∧0 = 0∧0 = 0∧[1 + (-1)bso_14] ≥ 0)







For Pair 580_0_MINUS_EQ(x0[0], x2[0], x3[0]) → COND_580_0_MINUS_EQ(>(x3[0], 0), x0[0], x2[0], x3[0]) the following chains were created:
  • We consider the chain 580_0_MINUS_EQ(x0[0], x2[0], x3[0]) → COND_580_0_MINUS_EQ(>(x3[0], 0), x0[0], x2[0], x3[0]), COND_580_0_MINUS_EQ(TRUE, x0[1], x2[1], x3[1]) → 580_0_MINUS_EQ(x0[1], +(x2[1], -1), +(x3[1], -1)) which results in the following constraint:

    (8)    (>(x3[0], 0)=TRUEx0[0]=x0[1]x2[0]=x2[1]x3[0]=x3[1]580_0_MINUS_EQ(x0[0], x2[0], x3[0])≥NonInfC∧580_0_MINUS_EQ(x0[0], x2[0], x3[0])≥COND_580_0_MINUS_EQ(>(x3[0], 0), x0[0], x2[0], x3[0])∧(UIncreasing(COND_580_0_MINUS_EQ(>(x3[0], 0), x0[0], x2[0], x3[0])), ≥))



    We simplified constraint (8) using rule (IV) which results in the following new constraint:

    (9)    (>(x3[0], 0)=TRUE580_0_MINUS_EQ(x0[0], x2[0], x3[0])≥NonInfC∧580_0_MINUS_EQ(x0[0], x2[0], x3[0])≥COND_580_0_MINUS_EQ(>(x3[0], 0), x0[0], x2[0], x3[0])∧(UIncreasing(COND_580_0_MINUS_EQ(>(x3[0], 0), x0[0], x2[0], x3[0])), ≥))



    We simplified constraint (9) using rule (POLY_CONSTRAINTS) which results in the following new constraint:

    (10)    (x3[0] + [-1] ≥ 0 ⇒ (UIncreasing(COND_580_0_MINUS_EQ(>(x3[0], 0), x0[0], x2[0], x3[0])), ≥)∧[(-1)bni_15 + (-1)Bound*bni_15] + [bni_15]x3[0] ≥ 0∧[(-1)bso_16] ≥ 0)



    We simplified constraint (10) using rule (IDP_POLY_SIMPLIFY) which results in the following new constraint:

    (11)    (x3[0] + [-1] ≥ 0 ⇒ (UIncreasing(COND_580_0_MINUS_EQ(>(x3[0], 0), x0[0], x2[0], x3[0])), ≥)∧[(-1)bni_15 + (-1)Bound*bni_15] + [bni_15]x3[0] ≥ 0∧[(-1)bso_16] ≥ 0)



    We simplified constraint (11) using rule (POLY_REMOVE_MIN_MAX) which results in the following new constraint:

    (12)    (x3[0] + [-1] ≥ 0 ⇒ (UIncreasing(COND_580_0_MINUS_EQ(>(x3[0], 0), x0[0], x2[0], x3[0])), ≥)∧[(-1)bni_15 + (-1)Bound*bni_15] + [bni_15]x3[0] ≥ 0∧[(-1)bso_16] ≥ 0)



    We simplified constraint (12) using rule (IDP_UNRESTRICTED_VARS) which results in the following new constraint:

    (13)    (x3[0] + [-1] ≥ 0 ⇒ (UIncreasing(COND_580_0_MINUS_EQ(>(x3[0], 0), x0[0], x2[0], x3[0])), ≥)∧0 = 0∧0 = 0∧[(-1)bni_15 + (-1)Bound*bni_15] + [bni_15]x3[0] ≥ 0∧0 = 0∧0 = 0∧[(-1)bso_16] ≥ 0)



    We simplified constraint (13) using rule (IDP_SMT_SPLIT) which results in the following new constraint:

    (14)    (x3[0] ≥ 0 ⇒ (UIncreasing(COND_580_0_MINUS_EQ(>(x3[0], 0), x0[0], x2[0], x3[0])), ≥)∧0 = 0∧0 = 0∧[(-1)Bound*bni_15] + [bni_15]x3[0] ≥ 0∧0 = 0∧0 = 0∧[(-1)bso_16] ≥ 0)







To summarize, we get the following constraints P for the following pairs.
  • COND_580_0_MINUS_EQ(TRUE, x0[1], x2[1], x3[1]) → 580_0_MINUS_EQ(x0[1], +(x2[1], -1), +(x3[1], -1))
    • (x3[0] ≥ 0 ⇒ (UIncreasing(580_0_MINUS_EQ(x0[1], +(x2[1], -1), +(x3[1], -1))), ≥)∧0 = 0∧0 = 0∧[(-1)Bound*bni_13] + [bni_13]x3[0] ≥ 0∧0 = 0∧0 = 0∧[1 + (-1)bso_14] ≥ 0)

  • 580_0_MINUS_EQ(x0[0], x2[0], x3[0]) → COND_580_0_MINUS_EQ(>(x3[0], 0), x0[0], x2[0], x3[0])
    • (x3[0] ≥ 0 ⇒ (UIncreasing(COND_580_0_MINUS_EQ(>(x3[0], 0), x0[0], x2[0], x3[0])), ≥)∧0 = 0∧0 = 0∧[(-1)Bound*bni_15] + [bni_15]x3[0] ≥ 0∧0 = 0∧0 = 0∧[(-1)bso_16] ≥ 0)




The constraints for P> respective Pbound 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 Pbound.
Using the following integer polynomial ordering the resulting constraints can be solved
Polynomial interpretation over integers[POLO]:

POL(TRUE) = 0   
POL(FALSE) = 0   
POL(COND_580_0_MINUS_EQ(x1, x2, x3, x4)) = [-1] + x4   
POL(580_0_MINUS_EQ(x1, x2, x3)) = [-1] + x3   
POL(+(x1, x2)) = x1 + x2   
POL(-1) = [-1]   
POL(>(x1, x2)) = [-1]   
POL(0) = 0   

The following pairs are in P>:

COND_580_0_MINUS_EQ(TRUE, x0[1], x2[1], x3[1]) → 580_0_MINUS_EQ(x0[1], +(x2[1], -1), +(x3[1], -1))

The following pairs are in Pbound:

COND_580_0_MINUS_EQ(TRUE, x0[1], x2[1], x3[1]) → 580_0_MINUS_EQ(x0[1], +(x2[1], -1), +(x3[1], -1))
580_0_MINUS_EQ(x0[0], x2[0], x3[0]) → COND_580_0_MINUS_EQ(>(x3[0], 0), x0[0], x2[0], x3[0])

The following pairs are in P:

580_0_MINUS_EQ(x0[0], x2[0], x3[0]) → COND_580_0_MINUS_EQ(>(x3[0], 0), x0[0], x2[0], x3[0])

There are no usable rules.

(12) Obligation:

IDP problem:
The following function symbols are pre-defined:
!=~Neq: (Integer, Integer) -> Boolean
*~Mul: (Integer, Integer) -> Integer
>=~Ge: (Integer, Integer) -> Boolean
-1~UnaryMinus: (Integer) -> Integer
|~Bwor: (Integer, Integer) -> Integer
/~Div: (Integer, Integer) -> Integer
=~Eq: (Integer, Integer) -> Boolean
~Bwxor: (Integer, Integer) -> Integer
||~Lor: (Boolean, Boolean) -> Boolean
!~Lnot: (Boolean) -> Boolean
<~Lt: (Integer, Integer) -> Boolean
-~Sub: (Integer, Integer) -> Integer
<=~Le: (Integer, Integer) -> Boolean
>~Gt: (Integer, Integer) -> Boolean
~~Bwnot: (Integer) -> Integer
%~Mod: (Integer, Integer) -> Integer
&~Bwand: (Integer, Integer) -> Integer
+~Add: (Integer, Integer) -> Integer
&&~Land: (Boolean, Boolean) -> Boolean


The following domains are used:

Integer


R is empty.

The integer pair graph contains the following rules and edges:
(0): 580_0_MINUS_EQ(x0[0], x2[0], x3[0]) → COND_580_0_MINUS_EQ(x3[0] > 0, x0[0], x2[0], x3[0])


The set Q is empty.

(13) IDependencyGraphProof (EQUIVALENT transformation)

The approximation of the Dependency Graph [LPAR04,FROCOS05,EDGSTAR] contains 0 SCCs with 1 less node.

(14) TRUE