/export/starexec/sandbox/solver/bin/starexec_run_c /export/starexec/sandbox/benchmark/theBenchmark.c /export/starexec/sandbox/output/output_files


--------------------------------------------------------------------------------


YES
proof of /export/starexec/sandbox/benchmark/theBenchmark.c
# AProVE Commit ID: 48fb2092695e11cc9f56e44b17a92a5f88ffb256 marcel 20180622 unpublished dirty


Termination of the given C Problem could be proven:

(0) C Problem
(1) CToLLVMProof [EQUIVALENT, 180 ms]
(2) LLVM problem
(3) LLVMToTerminationGraphProof [EQUIVALENT, 700 ms]
(4) LLVM Symbolic Execution Graph
(5) SymbolicExecutionGraphToSCCProof [SOUND, 0 ms]
(6) LLVM Symbolic Execution SCC
(7) SCC2IRS [SOUND, 105 ms]
(8) IntTRS
(9) IRS2T2 [EQUIVALENT, 0 ms]
(10) T2IntSys
(11) T2 [EQUIVALENT, 743 ms]
(12) YES


----------------------------------------

(0)
Obligation:
c file /export/starexec/sandbox/benchmark/theBenchmark.c
----------------------------------------

(1) CToLLVMProof (EQUIVALENT)
Compiled c-file /export/starexec/sandbox/benchmark/theBenchmark.c to LLVM.
----------------------------------------

(2)
Obligation:
LLVM Problem

Aliases:

Data layout:

"e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"

Machine:

"x86_64-pc-linux-gnu"

Type definitions:

Global variables:

Name: x initVal: 0 type: i32 addrSpace: null alignment: 4 threadLocal: false constant: false linkageType: COMMON section: null

Function declarations and definitions:

*BasicFunctionTypename: "__VERIFIER_nondet_int" returnParam: i32 parameters: () variableLength: false visibilityType: DEFAULT callingConvention: ccc
*BasicFunctionTypename: "foo" linkageType: EXTERNALLY_VISIBLE returnParam: BasicVoidType parameters: () variableLength: false visibilityType: DEFAULT callingConvention: ccc
	0:
		%1 = load @x
		%2 = add %1 -1
		store %2, @x
		ret void

*BasicFunctionTypename: "main" linkageType: EXTERNALLY_VISIBLE returnParam: i32 parameters: () variableLength: false visibilityType: DEFAULT callingConvention: ccc
	0:
		%1 = alloca i32, align 4
		store 0, %1
		%2 = call i32 @__VERIFIER_nondet_int()
		store %2, @x
		br %3
	3:
		%4 = load @x
		%5 = icmp sgt %4 0
		br %5, %6, %12
	6:
		%7 = call i32 @__VERIFIER_nondet_int()
		%8 = icmp ne %7 0
		br %8, %9, %10
	9:
		Unnamed Call-Instruction = call BasicVoidType @foo()
		br %11
	10:
		Unnamed Call-Instruction = call BasicVoidType @foo()
		br %11
	11:
		br %3
	12:
		ret 0


Analyze Termination of all function calls matching the pattern:
main()
----------------------------------------

(3) LLVMToTerminationGraphProof (EQUIVALENT)
Constructed symbolic execution graph for LLVM program and proved memory safety.
----------------------------------------

(4)
Obligation:
SE Graph
----------------------------------------

(5) SymbolicExecutionGraphToSCCProof (SOUND)
Splitted symbolic execution graph to 1 SCC.
----------------------------------------

(6)
Obligation:
SCC
----------------------------------------

(7) SCC2IRS (SOUND)
Transformed LLVM symbolic execution graph SCC into a rewrite problem. Log: 
Generated rules. Obtained 40 rulesP rules:
f_177(v106, v109, v112, v107, v113, 0, v108, 1, 3, 4) -> f_179(v106, v109, v116, v112, v107, v113, 0, v108, 1, 3, 4) :|: 1 + v116 = v109 && 0 <= v116
f_179(v106, v109, v116, v112, v107, v113, 0, v108, 1, 3, 4) -> f_181(v106, v109, v116, v112, v107, v113, 0, v108, 1, 3, 4) :|: TRUE
f_181(v106, v109, v116, v112, v107, v113, 0, v108, 1, 3, 4) -> f_183(v106, v107, v108, v109, 1, 0, v112, v113, v116, 3, 4) :|: TRUE
f_183(v106, v107, v108, v109, 1, 0, v112, v113, v116, 3, 4) -> f_185(v106, v107, v108, v109, 1, 0, v112, v113, v116, 3, 4) :|: TRUE
f_185(v106, v107, v108, v109, 1, 0, v112, v113, v116, 3, 4) -> f_188(v106, v107, v108, v109, 1, 0, v112, v113, v116, 3, 4) :|: TRUE
f_188(v106, v107, v108, v109, 1, 0, v112, v113, v116, 3, 4) -> f_190(v106, v107, v108, v116, 1, 0, v112, v113, 3, 4) :|: 0 = 0
f_190(v106, v107, v108, v116, 1, 0, v112, v113, 3, 4) -> f_193(v106, v107, v108, v116, 1, 0, v112, v113, 3, 2, 4) :|: 0 < v116 && 2 <= v108
f_193(v106, v107, v108, v116, 1, 0, v112, v113, 3, 2, 4) -> f_197(v106, v107, v108, v116, 1, 0, v112, v113, 3, 2, 4) :|: 0 = 0
f_197(v106, v107, v108, v116, 1, 0, v112, v113, 3, 2, 4) -> f_201(v106, v107, v108, v116, 1, 0, v112, v113, 3, 2, 4) :|: TRUE
f_201(v106, v107, v108, v116, 1, 0, v112, v113, 3, 2, 4) -> f_204(v106, v107, v108, v116, 1, v146, 0, v112, v113, 3, 2, 4) :|: TRUE
f_204(v106, v107, v108, v116, 1, v146, 0, v112, v113, 3, 2, 4) -> f_207(v106, v107, v108, v116, 1, v146, 0, v112, v113, 3, 2, 4) :|: v146 != 0
f_204(v106, v107, v108, v116, 1, v146, 0, v112, v113, 3, 2, 4) -> f_208(v106, v107, v108, v116, 1, 0, v112, v113, 3, 2, 4) :|: v146 = 0
f_207(v106, v107, v108, v116, 1, v146, 0, v112, v113, 3, 2, 4) -> f_211(v106, v107, v108, v116, 1, v146, v112, v113, 0, 3, 2, 4) :|: 0 = 0
f_211(v106, v107, v108, v116, 1, v146, v112, v113, 0, 3, 2, 4) -> f_215(v106, v107, v108, v116, 1, v146, v112, v113, 0, 3, 2, 4) :|: TRUE
f_215(v106, v107, v108, v116, 1, v146, v112, v113, 0, 3, 2, 4) -> f_213(v106, v107, v108, v116, 1, v146, v112, v113, 0, 3, 2, 4) :|: TRUE
f_213(v121, v122, v123, v129, 1, v145, v127, v128, 0, 3, 2, 4) -> f_217(v121, v127, v122, v128, v129, 0, v123, 1, v145, 3, 2, 4) :|: TRUE
f_217(v121, v127, v122, v128, v129, 0, v123, 1, v145, 3, 2, 4) -> f_219(v121, v129, v127, v122, v128, 0, v123, 1, v145, 3, 2, 4) :|: 0 = 0
f_219(v121, v129, v127, v122, v128, 0, v123, 1, v145, 3, 2, 4) -> f_220(v121, v129, v174, v127, v122, v128, 0, v123, 1, v145, 3, 2, 4) :|: 1 + v174 = v129 && 0 <= v174
f_220(v121, v129, v174, v127, v122, v128, 0, v123, 1, v145, 3, 2, 4) -> f_221(v121, v129, v174, v127, v122, v128, 0, v123, 1, v145, 3, 2, 4) :|: TRUE
f_221(v121, v129, v174, v127, v122, v128, 0, v123, 1, v145, 3, 2, 4) -> f_222(v121, v122, v123, v129, 1, v145, v127, v128, 0, v174, 3, 2, 4) :|: TRUE
f_222(v121, v122, v123, v129, 1, v145, v127, v128, 0, v174, 3, 2, 4) -> f_223(v121, v122, v123, v129, 1, v145, v127, v128, 0, v174, 3, 2, 4) :|: TRUE
f_223(v121, v122, v123, v129, 1, v145, v127, v128, 0, v174, 3, 2, 4) -> f_224(v121, v122, v123, v129, 1, v145, v127, v128, 0, v174, 3, 2, 4) :|: TRUE
f_224(v121, v122, v123, v129, 1, v145, v127, v128, 0, v174, 3, 2, 4) -> f_187(v121, v122, v123, v129, 1, v145, v127, v128, v174, 0, 3, 4) :|: TRUE
f_187(v121, v122, v123, v124, 1, v126, v127, v128, v129, 0, 3, 4) -> f_189(v121, v122, v123, v129, 1, v126, v127, v128, 0, 3, 4) :|: 0 = 0
f_189(v121, v122, v123, v129, 1, v126, v127, v128, 0, 3, 4) -> f_191(v121, v122, v123, v129, 1, v126, v127, v128, 0, 3, 2, 4) :|: 0 < v129 && 2 <= v123
f_191(v121, v122, v123, v129, 1, v126, v127, v128, 0, 3, 2, 4) -> f_195(v121, v122, v123, v129, 1, v126, v127, v128, 0, 3, 2, 4) :|: 0 = 0
f_195(v121, v122, v123, v129, 1, v126, v127, v128, 0, 3, 2, 4) -> f_199(v121, v122, v123, v129, 1, v126, v127, v128, 0, 3, 2, 4) :|: TRUE
f_199(v121, v122, v123, v129, 1, v126, v127, v128, 0, 3, 2, 4) -> f_203(v121, v122, v123, v129, 1, v145, v127, v128, 0, 3, 2, 4) :|: TRUE
f_203(v121, v122, v123, v129, 1, v145, v127, v128, 0, 3, 2, 4) -> f_205(v121, v122, v123, v129, 1, v145, v127, v128, 0, 3, 2, 4) :|: v145 != 0
f_203(v121, v122, v123, v129, 1, v145, v127, v128, 0, 3, 2, 4) -> f_206(v121, v122, v123, v129, 1, 0, v127, v128, 3, 2, 4) :|: v145 = 0
f_205(v121, v122, v123, v129, 1, v145, v127, v128, 0, 3, 2, 4) -> f_209(v121, v122, v123, v129, 1, v145, v127, v128, 0, 3, 2, 4) :|: 0 = 0
f_209(v121, v122, v123, v129, 1, v145, v127, v128, 0, 3, 2, 4) -> f_213(v121, v122, v123, v129, 1, v145, v127, v128, 0, 3, 2, 4) :|: TRUE
f_206(v121, v122, v123, v129, 1, 0, v127, v128, 3, 2, 4) -> f_210(v121, v122, v123, v129, 1, 0, v127, v128, 3, 2, 4) :|: 0 = 0
f_210(v121, v122, v123, v129, 1, 0, v127, v128, 3, 2, 4) -> f_214(v121, v122, v123, v129, 1, 0, v127, v128, 3, 2, 4) :|: TRUE
f_214(v121, v122, v123, v129, 1, 0, v127, v128, 3, 2, 4) -> f_218(v121, v127, v122, v128, v129, 0, v123, 1, 3, 2, 4) :|: TRUE
f_218(v121, v127, v122, v128, v129, 0, v123, 1, 3, 2, 4) -> f_175(v121, v127, v122, v128, v129, 0, v108, 1, 3, 4) :|: TRUE
f_175(v106, v112, v107, v113, v109, 0, v108, 1, 3, 4) -> f_177(v106, v109, v112, v107, v113, 0, v108, 1, 3, 4) :|: 0 = 0
f_208(v106, v107, v108, v116, 1, 0, v112, v113, 3, 2, 4) -> f_212(v106, v107, v108, v116, 1, 0, v112, v113, 3, 2, 4) :|: 0 = 0
f_212(v106, v107, v108, v116, 1, 0, v112, v113, 3, 2, 4) -> f_216(v106, v107, v108, v116, 1, 0, v112, v113, 3, 2, 4) :|: TRUE
f_216(v106, v107, v108, v116, 1, 0, v112, v113, 3, 2, 4) -> f_214(v106, v107, v108, v116, 1, 0, v112, v113, 3, 2, 4) :|: TRUE
Combined rules. Obtained 6 rulesP rules:
f_203(v121:0, v122:0, v123:0, 1 + v174:0, 1, v145:0, v127:0, v128:0, 0, 3, 2, 4) -> f_203(v121:0, v122:0, v123:0, v174:0, 1, v145:1, v127:0, v128:0, 0, 3, 2, 4) :|: v174:0 > 0 && v145:0 < 0 && v123:0 > 1
f_203(v121:0, v122:0, v123:0, 1 + v174:0, 1, v145:0, v127:0, v128:0, 0, 3, 2, 4) -> f_203(v121:0, v122:0, v123:0, v174:0, 1, v145:1, v127:0, v128:0, 0, 3, 2, 4) :|: v174:0 > 0 && v145:0 > 0 && v123:0 > 1
f_177(v106:0, 1 + v116:0, v112:0, v107:0, v113:0, 0, v108:0, 1, 3, 4) -> f_177(v106:0, v116:0, v112:0, v107:0, v113:0, 0, v108:1, 1, 3, 4) :|: v108:0 > 1 && v116:0 > 0
f_177(v106:0, 1 + (1 + v174:0), v112:0, v107:0, v113:0, 0, v108:0, 1, 3, 4) -> f_203(v106:0, v107:0, v108:0, v174:0, 1, v145:0, v112:0, v113:0, 0, 3, 2, 4) :|: v174:0 > 0 && v108:0 > 1 && v146:0 < 0
f_177(v106:0, 1 + (1 + v174:0), v112:0, v107:0, v113:0, 0, v108:0, 1, 3, 4) -> f_203(v106:0, v107:0, v108:0, v174:0, 1, v145:0, v112:0, v113:0, 0, 3, 2, 4) :|: v174:0 > 0 && v108:0 > 1 && v146:0 > 0
f_203(v121:0, v122:0, v123:0, v129:0, 1, 0, v127:0, v128:0, 0, 3, 2, 4) -> f_177(v121:0, v129:0, v127:0, v122:0, v128:0, 0, v108:0, 1, 3, 4) :|: TRUE
Filtered unneeded arguments:
   f_203(x1, x2, x3, x4, x5, x6, x7, x8, x9, x10, x11, x12) -> f_203(x3, x4, x6)
   f_177(x1, x2, x3, x4, x5, x6, x7, x8, x9, x10) -> f_177(x2, x7)
Removed division, modulo operations, cleaned up constraints. Obtained 5 rules.P rules:
f_203(v123:0, sum~cons_1~v174:0, v145:0) -> f_203(v123:0, v174:0, v145:1) :|: v145:0 < 0 && v123:0 > 1 && v174:0 > 0 && sum~cons_1~v174:0 = 1 + v174:0
f_203(v123:0, sum~cons_1~v174:0, v145:0) -> f_203(v123:0, v174:0, v145:1) :|: v145:0 > 0 && v123:0 > 1 && v174:0 > 0 && sum~cons_1~v174:0 = 1 + v174:0
f_177(sum~cons_1~v116:0, v108:0) -> f_177(v116:0, v108:1) :|: v108:0 > 1 && v116:0 > 0 && sum~cons_1~v116:0 = 1 + v116:0
f_177(sum~cons_1~sum~cons_1~v174:0, v108:0) -> f_203(v108:0, v174:0, v145:0) :|: v174:0 > 0 && v108:0 > 1 && sum~cons_1~sum~cons_1~v174:0 = 1 + (1 + v174:0)
f_203(v123:0, v129:0, cons_0) -> f_177(v129:0, v108:0) :|: TRUE && cons_0 = 0

----------------------------------------

(8)
Obligation:
Rules:
f_203(v123:0, sum~cons_1~v174:0, v145:0) -> f_203(v123:0, v174:0, v145:1) :|: v145:0 < 0 && v123:0 > 1 && v174:0 > 0 && sum~cons_1~v174:0 = 1 + v174:0
f_203(x, x1, x2) -> f_203(x, x3, x4) :|: x2 > 0 && x > 1 && x3 > 0 && x1 = 1 + x3
f_177(sum~cons_1~v116:0, v108:0) -> f_177(v116:0, v108:1) :|: v108:0 > 1 && v116:0 > 0 && sum~cons_1~v116:0 = 1 + v116:0
f_177(x5, x6) -> f_203(x6, x7, x8) :|: x7 > 0 && x6 > 1 && x5 = 1 + (1 + x7)
f_203(x9, x10, x11) -> f_177(x10, x12) :|: TRUE && x11 = 0

----------------------------------------

(9) IRS2T2 (EQUIVALENT)
Transformed input IRS into an integer transition system.Used the following mapping from defined symbols to location IDs:

   (f_203_3,1)
   (f_177_3,2)

----------------------------------------

(10)
Obligation:
START: 0;

FROM: 0;
TO: 1;

FROM: 0;
TO: 2;

FROM: 1;
oldX0 := x0;
oldX1 := x1;
oldX2 := x2;
oldX3 := oldX1 - 1;
oldX4 := nondet();
assume(oldX2 < 0 && oldX0 > 1 && oldX3 > 0 && oldX1 = 1 + oldX3);
x0 := oldX0;
x1 := oldX1 - 1;
x2 := oldX4;
TO: 1;

FROM: 1;
oldX0 := x0;
oldX1 := x1;
oldX2 := x2;
oldX3 := oldX1 - 1;
oldX4 := nondet();
assume(oldX2 > 0 && oldX0 > 1 && oldX3 > 0 && oldX1 = 1 + oldX3);
x0 := oldX0;
x1 := oldX1 - 1;
x2 := oldX4;
TO: 1;

FROM: 2;
oldX0 := x0;
oldX1 := x1;
oldX2 := x2;
oldX3 := oldX0 - 1;
oldX4 := nondet();
oldX5 := nondet();
assume(oldX1 > 1 && oldX3 > 0 && oldX0 = 1 + oldX3);
x0 := oldX0 - 1;
x1 := oldX4;
x2 := oldX5;
TO: 2;

FROM: 2;
oldX0 := x0;
oldX1 := x1;
oldX2 := x2;
oldX3 := oldX0 - 2;
oldX4 := nondet();
assume(oldX3 > 0 && oldX1 > 1 && oldX0 = 1 + (1 + oldX3));
x0 := oldX1;
x1 := oldX0 - 2;
x2 := oldX4;
TO: 1;

FROM: 1;
oldX0 := x0;
oldX1 := x1;
oldX2 := x2;
oldX3 := nondet();
oldX4 := nondet();
assume(0 = 0 && oldX2 = 0);
x0 := oldX1;
x1 := oldX3;
x2 := oldX4;
TO: 2;


----------------------------------------

(11) T2 (EQUIVALENT)
Initially, performed program simplifications using lexicographic rank functions:
 * Removed transitions 2, 5, 6, 7, 17, 20, 21 using the following rank functions:
    - Rank function 1:
      RF for loc. 6: 2*x1
      RF for loc. 7: -2+2*x0
      RF for loc. 8: -1+2*x1
      RF for loc. 12: -3+2*x0
      Bound for (chained) transitions 5: 3
      Bound for (chained) transitions 6: 3
      Bound for (chained) transitions 20: 1
      Bound for (chained) transitions 21: 3
    - Rank function 2:
      RF for loc. 6: 1
      RF for loc. 7: -1
      RF for loc. 8: 0
      RF for loc. 12: -2
      Bound for (chained) transitions 2: 1
      Bound for (chained) transitions 7: 0
      Bound for (chained) transitions 17: -1

----------------------------------------

(12)
YES