LTS Termination Proof

by AProVE

Input

Integer Transition System

Proof

1 Switch to Cooperation Termination Proof

We consider the following cutpoint-transitions:
f323_0_createTree_Return f323_0_createTree_Return f323_0_createTree_Return: x1 = x1x2 = x2x3 = x3x4 = x4
f977_0_random_ArrayAccess f977_0_random_ArrayAccess f977_0_random_ArrayAccess: x1 = x1x2 = x2x3 = x3x4 = x4
f521_0_createNode_Return f521_0_createNode_Return f521_0_createNode_Return: x1 = x1x2 = x2x3 = x3x4 = x4
f1_0_main_Load f1_0_main_Load f1_0_main_Load: x1 = x1x2 = x2x3 = x3x4 = x4
f931_0_random_ArrayAccess f931_0_random_ArrayAccess f931_0_random_ArrayAccess: x1 = x1x2 = x2x3 = x3x4 = x4
f2251_0_createTree_LE f2251_0_createTree_LE f2251_0_createTree_LE: x1 = x1x2 = x2x3 = x3x4 = x4
f2233_0_randomlyDuplicate_NULL f2233_0_randomlyDuplicate_NULL f2233_0_randomlyDuplicate_NULL: x1 = x1x2 = x2x3 = x3x4 = x4
f588_0_createNode_Return f588_0_createNode_Return f588_0_createNode_Return: x1 = x1x2 = x2x3 = x3x4 = x4
f1843_0_main_InvokeMethod f1843_0_main_InvokeMethod f1843_0_main_InvokeMethod: x1 = x1x2 = x2x3 = x3x4 = x4
__init __init __init: x1 = x1x2 = x2x3 = x3x4 = x4
and for every transition t, a duplicate t is considered.

2 SCC Decomposition

We consider subproblems for each of the 2 SCC(s) of the program graph.

2.1 SCC Subproblem 1/2

Here we consider the SCC { f2251_0_createTree_LE }.

2.1.1 Transition Removal

We remove transitions 9, 10, 11 using the following ranking functions, which are bounded by 0.

f2251_0_createTree_LE: x2

2.1.2 Trivial Cooperation Program

There are no more "sharp" transitions in the cooperation program. Hence the cooperation termination is proved.

2.2 SCC Subproblem 2/2

Here we consider the SCC { f2233_0_randomlyDuplicate_NULL }.

2.2.1 Transition Removal

We remove transitions 16, 17 using the following ranking functions, which are bounded by 0.

f2233_0_randomlyDuplicate_NULL: x1

2.2.2 Trivial Cooperation Program

There are no more "sharp" transitions in the cooperation program. Hence the cooperation termination is proved.

Tool configuration

AProVE