Execution Chart

We display below the execution chart for this examination (boot time has been removed).

Trace from the execution

Waiting for the VM to be ready (probing ssh)
..................
=====================================================================
Generated by BenchKit 2-3253
Executing tool tapaal
Input is SmallOperatingSystem-PT-MT8192DC2048, examination is CTLFireability
Time confinement is 3600 seconds
Memory confinement is 16384 MBytes
Number of cores is 4
Run identifier is r079-ebro-149441009300049
=====================================================================

--------------------
content from stdout:

=== Data for post analysis generated by BenchKit (invocation template)

The expected result is a vector of booleans
BOOL_VECTOR

here is the order used to build the result vector(from text file)
FORMULA_NAME SmallOperatingSystem-PT-MT8192DC2048-CTLFireability-0
FORMULA_NAME SmallOperatingSystem-PT-MT8192DC2048-CTLFireability-1
FORMULA_NAME SmallOperatingSystem-PT-MT8192DC2048-CTLFireability-10
FORMULA_NAME SmallOperatingSystem-PT-MT8192DC2048-CTLFireability-11
FORMULA_NAME SmallOperatingSystem-PT-MT8192DC2048-CTLFireability-12
FORMULA_NAME SmallOperatingSystem-PT-MT8192DC2048-CTLFireability-13
FORMULA_NAME SmallOperatingSystem-PT-MT8192DC2048-CTLFireability-14
FORMULA_NAME SmallOperatingSystem-PT-MT8192DC2048-CTLFireability-15
FORMULA_NAME SmallOperatingSystem-PT-MT8192DC2048-CTLFireability-2
FORMULA_NAME SmallOperatingSystem-PT-MT8192DC2048-CTLFireability-3
FORMULA_NAME SmallOperatingSystem-PT-MT8192DC2048-CTLFireability-4
FORMULA_NAME SmallOperatingSystem-PT-MT8192DC2048-CTLFireability-5
FORMULA_NAME SmallOperatingSystem-PT-MT8192DC2048-CTLFireability-6
FORMULA_NAME SmallOperatingSystem-PT-MT8192DC2048-CTLFireability-7
FORMULA_NAME SmallOperatingSystem-PT-MT8192DC2048-CTLFireability-8
FORMULA_NAME SmallOperatingSystem-PT-MT8192DC2048-CTLFireability-9

=== Now, execution of the tool begins

BK_START 1494955975353

---> tapaal --- TAPAAL
Total timeout: 3600

*************************************
* TAPAAL verifying CTLFireability *
*************************************
---------------------------------------------------
Step 1: Parallel processing
---------------------------------------------------
Doing parallel verification of individual queries (16 in total)
Each query is verified by 2 parallel strategies for 60 seconds
------------------- QUERY 1 ----------------------
No solution found
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
LANGUAGE = (unset),
LC_ALL = (unset),
LANG = "fr_FR.UTF-8"
are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
LANGUAGE = (unset),
LC_ALL = (unset),
LANG = "fr_FR.UTF-8"
are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").

Parameters: -s DFS -d 10 ./model.pnml ./CTLFireability.xml -x 1

Parameters: -s DFS -q 0 -d 10 ./model.pnml ./CTLFireability.xml -x 1


------------------- QUERY 2 ----------------------
Solution found
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
LANGUAGE = (unset),
LC_ALL = (unset),
LANG = "fr_FR.UTF-8"
are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
LANGUAGE = (unset),
LC_ALL = (unset),
LANG = "fr_FR.UTF-8"
are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").

Parameters: -s DFS -d 10 ./model.pnml ./CTLFireability.xml -x 2

Search=DFS,Trace=DISABLED,State_Space_Exploration=DISABLED,Structural_Reduction=AGGRESSIVE,Struct_Red_Timout=10,Stubborn_Reduction=ENABLED,Query_Simplication=ENABLED,QSTimeout=30,Siphon_Trap=DISABLED,LPSolve_Timeout=10

Query before reduction: EF (not ((((TaskSuspended >= 1) and (CPUUnit >= 1)) or (ExecutingTask >= 1)) or (not (((DiskControllerUnit >= 1) and ((FreeMemSegment >= 1) and (TaskOnDisk >= 1))) and (ExecutingTask >= 1)))))
Query after reduction: false
Query size reduced from 28 to 1 nodes (96.43 percent reduction).
Query reduction finished after 0.002810 seconds.


Query is NOT satisfied.

Query solved by Query Simplification.

parallel: This job succeeded:
/home/mcc/BenchKit/start.sh 7250000 /home/mcc/BenchKit/bin/verifypn-linux64 -s\ DFS\ -d\ 10 ./model.pnml ./CTLFireability.xml -x 2

FORMULA SmallOperatingSystem-PT-MT8192DC2048-CTLFireability-1 FALSE TECHNIQUES COLLATERAL_PROCESSING EXPLICIT STRUCTURAL_REDUCTION STATE_COMPRESSION STUBBORN_SETS
------------------- QUERY 3 ----------------------
No solution found
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
LANGUAGE = (unset),
LC_ALL = (unset),
LANG = "fr_FR.UTF-8"
are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
LANGUAGE = (unset),
LC_ALL = (unset),
LANG = "fr_FR.UTF-8"
are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").

Parameters: -s DFS -d 10 ./model.pnml ./CTLFireability.xml -x 3

Parameters: -s DFS -q 0 -d 10 ./model.pnml ./CTLFireability.xml -x 3


------------------- QUERY 4 ----------------------
No solution found
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
LANGUAGE = (unset),
LC_ALL = (unset),
LANG = "fr_FR.UTF-8"
are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
LANGUAGE = (unset),
LC_ALL = (unset),
LANG = "fr_FR.UTF-8"
are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").

Parameters: -s DFS -d 10 ./model.pnml ./CTLFireability.xml -x 4

Parameters: -s DFS -q 0 -d 10 ./model.pnml ./CTLFireability.xml -x 4


------------------- QUERY 5 ----------------------
Solution found
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
LANGUAGE = (unset),
LC_ALL = (unset),
LANG = "fr_FR.UTF-8"
are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
LANGUAGE = (unset),
LC_ALL = (unset),
LANG = "fr_FR.UTF-8"
are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").

Parameters: -s DFS -d 10 ./model.pnml ./CTLFireability.xml -x 5

Parameters: -s DFS -q 0 -d 10 ./model.pnml ./CTLFireability.xml -x 5

Search=DFS,Trace=DISABLED,State_Space_Exploration=DISABLED,Structural_Reduction=AGGRESSIVE,Struct_Red_Timout=10,Stubborn_Reduction=ENABLED,Query_Simplication=DISABLED,Siphon_Trap=DISABLED,LPSolve_Timeout=10


Query is satisfied.

STATS:
Time (seconds): 0.01368
Configurations: 4101
Markings: 4098
Edges: 4101
Processed Edges: 8197
Processed N. Edges: 4
Explored Configs: 4101
Query: !((!(EF!((tokens-count(TransferToDisk) ge integer-constant(1) | (tokens-count(TaskOnDisk) ge integer-constant(1) & (tokens-count(DiskControllerUnit) ge integer-constant(1) & tokens-count(TaskSuspended) ge integer-constant(1)))))) | E(!(tokens-count(TaskReady) ge integer-constant(1))) U ((tokens-count(TransferToDisk) ge integer-constant(1) | tokens-count(ExecutingTask) ge integer-constant(1)))))


Search=DFS,Trace=DISABLED,State_Space_Exploration=DISABLED,Structural_Reduction=AGGRESSIVE,Struct_Red_Timout=10,Stubborn_Reduction=ENABLED,Query_Simplication=ENABLED,QSTimeout=30,Siphon_Trap=DISABLED,LPSolve_Timeout=10

Query before reduction: (not (AG ((TransferToDisk >= 1) or ((TaskOnDisk >= 1) and ((DiskControllerUnit >= 1) and (TaskSuspended >= 1)))) or E ((not (TaskReady >= 1)) U ((TransferToDisk >= 1) or (ExecutingTask >= 1)))))
Query after reduction: (EF ((TransferToDisk < 1) and ((DiskControllerUnit < 1) or (TaskSuspended < 1))) and (not E ((TaskReady < 1) U ((TransferToDisk >= 1) or (ExecutingTask >= 1)))))
Query size reduced from 28 to 24 nodes (14.29 percent reduction).
Query reduction finished after 0.001846 seconds.


Query is satisfied.

STATS:
Time (seconds): 0.01833
Configurations: 4100
Markings: 4098
Edges: 4099
Processed Edges: 8196
Processed N. Edges: 2
Explored Configs: 4100
Query: (EF(tokens-count(TransferToDisk) ls integer-constant(1) & (tokens-count(DiskControllerUnit) ls integer-constant(1) | tokens-count(TaskSuspended) ls integer-constant(1))) & !(E(tokens-count(TaskReady) ls integer-constant(1)) U ((tokens-count(TransferToDisk) ge integer-constant(1) | tokens-count(ExecutingTask) ge integer-constant(1)))))

parallel: This job succeeded:
/home/mcc/BenchKit/start.sh 14500000 /home/mcc/BenchKit/bin/verifypn-linux64 -s\ DFS\ -q\ 0\ -d\ 10 ./model.pnml ./CTLFireability.xml -x 5

FORMULA SmallOperatingSystem-PT-MT8192DC2048-CTLFireability-4 TRUE TECHNIQUES COLLATERAL_PROCESSING EXPLICIT STRUCTURAL_REDUCTION STATE_COMPRESSION STUBBORN_SETS
------------------- QUERY 6 ----------------------
Solution found
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
LANGUAGE = (unset),
LC_ALL = (unset),
LANG = "fr_FR.UTF-8"
are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
LANGUAGE = (unset),
LC_ALL = (unset),
LANG = "fr_FR.UTF-8"
are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").

Parameters: -s DFS -d 10 ./model.pnml ./CTLFireability.xml -x 6

Parameters: -s DFS -q 0 -d 10 ./model.pnml ./CTLFireability.xml -x 6

Search=DFS,Trace=DISABLED,State_Space_Exploration=DISABLED,Structural_Reduction=AGGRESSIVE,Struct_Red_Timout=10,Stubborn_Reduction=ENABLED,Query_Simplication=ENABLED,QSTimeout=30,Siphon_Trap=DISABLED,LPSolve_Timeout=10

Query before reduction: EG AF (TaskReady >= 1)
Query after reduction: EG AF (TaskReady >= 1)
Query size reduced from 5 to 5 nodes (0.00 percent reduction).
Query reduction finished after 0.000370 seconds.


Query is satisfied.

STATS:
Time (seconds): 0.01323
Configurations: 4107
Markings: 4098
Edges: 4107
Processed Edges: 8202
Processed N. Edges: 9
Explored Configs: 4104
Query: !(AF!(AFtokens-count(TaskReady) ge integer-constant(1)))

parallel: This job succeeded:
/home/mcc/BenchKit/start.sh 7250000 /home/mcc/BenchKit/bin/verifypn-linux64 -s\ DFS\ -d\ 10 ./model.pnml ./CTLFireability.xml -x 6

FORMULA SmallOperatingSystem-PT-MT8192DC2048-CTLFireability-5 TRUE TECHNIQUES COLLATERAL_PROCESSING EXPLICIT STRUCTURAL_REDUCTION STATE_COMPRESSION STUBBORN_SETS
------------------- QUERY 7 ----------------------
Solution found
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
LANGUAGE = (unset),
LC_ALL = (unset),
LANG = "fr_FR.UTF-8"
are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
LANGUAGE = (unset),
LC_ALL = (unset),
LANG = "fr_FR.UTF-8"
are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").

Parameters: -s DFS -d 10 ./model.pnml ./CTLFireability.xml -x 7

Parameters: -s DFS -q 0 -d 10 ./model.pnml ./CTLFireability.xml -x 7

Search=DFS,Trace=DISABLED,State_Space_Exploration=DISABLED,Structural_Reduction=AGGRESSIVE,Struct_Red_Timout=10,Stubborn_Reduction=ENABLED,Query_Simplication=ENABLED,QSTimeout=30,Siphon_Trap=DISABLED,LPSolve_Timeout=10

Query before reduction: A ((not ((TaskOnDisk >= 1) and ((DiskControllerUnit >= 1) and (TaskSuspended >= 1)))) U ((CPUUnit >= 1) and (TaskReady >= 1)))
Query after reduction: A (((DiskControllerUnit < 1) or (TaskSuspended < 1)) U ((CPUUnit >= 1) and (TaskReady >= 1)))
Query size reduced from 19 to 15 nodes (21.05 percent reduction).
Query reduction finished after 0.001249 seconds.


Query is satisfied.

STATS:
Time (seconds): 0.0131
Configurations: 4097
Markings: 4097
Edges: 4097
Processed Edges: 8193
Processed N. Edges: 0
Explored Configs: 4097
Query: A((tokens-count(DiskControllerUnit) ls integer-constant(1) | tokens-count(TaskSuspended) ls integer-constant(1))) U ((tokens-count(CPUUnit) ge integer-constant(1) & tokens-count(TaskReady) ge integer-constant(1)))

parallel: This job succeeded:
/home/mcc/BenchKit/start.sh 7250000 /home/mcc/BenchKit/bin/verifypn-linux64 -s\ DFS\ -d\ 10 ./model.pnml ./CTLFireability.xml -x 7

FORMULA SmallOperatingSystem-PT-MT8192DC2048-CTLFireability-6 TRUE TECHNIQUES COLLATERAL_PROCESSING EXPLICIT STRUCTURAL_REDUCTION STATE_COMPRESSION STUBBORN_SETS
------------------- QUERY 8 ----------------------
Solution found
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
LANGUAGE = (unset),
LC_ALL = (unset),
LANG = "fr_FR.UTF-8"
are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
LANGUAGE = (unset),
LC_ALL = (unset),
LANG = "fr_FR.UTF-8"
are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").

Parameters: -s DFS -d 10 ./model.pnml ./CTLFireability.xml -x 8

Parameters: -s DFS -q 0 -d 10 ./model.pnml ./CTLFireability.xml -x 8

Search=DFS,Trace=DISABLED,State_Space_Exploration=DISABLED,Structural_Reduction=AGGRESSIVE,Struct_Red_Timout=10,Stubborn_Reduction=ENABLED,Query_Simplication=ENABLED,QSTimeout=30,Siphon_Trap=DISABLED,LPSolve_Timeout=10

Query before reduction: EG ((((TaskOnDisk >= 1) and ((DiskControllerUnit >= 1) and (TaskSuspended >= 1))) or AF ((CPUUnit >= 1) and (TaskReady >= 1))) and (not (((CPUUnit >= 1) and (TaskReady >= 1)) and ((CPUUnit >= 1) and (TaskReady >= 1)))))
Query after reduction: EG ((((TaskOnDisk >= 1) and ((DiskControllerUnit >= 1) and (TaskSuspended >= 1))) or AF ((CPUUnit >= 1) and (TaskReady >= 1))) and (((CPUUnit < 1) or (TaskReady < 1)) or ((CPUUnit < 1) or (TaskReady < 1))))
Query size reduced from 37 to 37 nodes (0.00 percent reduction).
Query reduction finished after 0.002327 seconds.


Query is NOT satisfied.

STATS:
Time (seconds): 0.04569
Configurations: 22534
Markings: 8193
Edges: 20487
Processed Edges: 28680
Processed N. Edges: 10245
Explored Configs: 18438
Query: !(AF!((((tokens-count(TaskOnDisk) ge integer-constant(1) & (tokens-count(DiskControllerUnit) ge integer-constant(1) & tokens-count(TaskSuspended) ge integer-constant(1))) | AF(tokens-count(CPUUnit) ge integer-constant(1) & tokens-count(TaskReady) ge integer-constant(1))) & ((tokens-count(CPUUnit) ls integer-constant(1) | tokens-count(TaskReady) ls integer-constant(1)) | (tokens-count(CPUUnit) ls integer-constant(1) | tokens-count(TaskReady) ls integer-constant(1))))))

parallel: This job succeeded:
/home/mcc/BenchKit/start.sh 7250000 /home/mcc/BenchKit/bin/verifypn-linux64 -s\ DFS\ -d\ 10 ./model.pnml ./CTLFireability.xml -x 8

FORMULA SmallOperatingSystem-PT-MT8192DC2048-CTLFireability-7 FALSE TECHNIQUES COLLATERAL_PROCESSING EXPLICIT STRUCTURAL_REDUCTION STATE_COMPRESSION STUBBORN_SETS
------------------- QUERY 9 ----------------------
Solution found
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
LANGUAGE = (unset),
LC_ALL = (unset),
LANG = "fr_FR.UTF-8"
are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
LANGUAGE = (unset),
LC_ALL = (unset),
LANG = "fr_FR.UTF-8"
are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").

Parameters: -s DFS -d 10 ./model.pnml ./CTLFireability.xml -x 9

Parameters: -s DFS -q 0 -d 10 ./model.pnml ./CTLFireability.xml -x 9

Search=DFS,Trace=DISABLED,State_Space_Exploration=DISABLED,Structural_Reduction=AGGRESSIVE,Struct_Red_Timout=10,Stubborn_Reduction=ENABLED,Query_Simplication=ENABLED,QSTimeout=30,Siphon_Trap=DISABLED,LPSolve_Timeout=10

Query before reduction: (A ((not (TransferToDisk >= 1)) U (((TaskReady >= 1) and (LoadingMem >= 1)) or ((CPUUnit >= 1) and (TaskReady >= 1)))) and AX EG (((DiskControllerUnit >= 1) and ((FreeMemSegment >= 1) and (TaskOnDisk >= 1))) or (TransferToDisk >= 1)))
Query after reduction: (A ((TransferToDisk < 1) U (((TaskReady >= 1) and (LoadingMem >= 1)) or ((CPUUnit >= 1) and (TaskReady >= 1)))) and AX EG (((DiskControllerUnit >= 1) and ((FreeMemSegment >= 1) and (TaskOnDisk >= 1))) or (TransferToDisk >= 1)))
Query size reduced from 37 to 37 nodes (0.00 percent reduction).
Query reduction finished after 0.002181 seconds.


Query is satisfied.

STATS:
Time (seconds): 0.01211
Configurations: 4106
Markings: 4098
Edges: 4103
Processed Edges: 8201
Processed N. Edges: 2
Explored Configs: 4103
Query: (A(tokens-count(TransferToDisk) ls integer-constant(1)) U (((tokens-count(TaskReady) ge integer-constant(1) & tokens-count(LoadingMem) ge integer-constant(1)) | (tokens-count(CPUUnit) ge integer-constant(1) & tokens-count(TaskReady) ge integer-constant(1)))) & AX!(AF!(((tokens-count(DiskControllerUnit) ge integer-constant(1) & (tokens-count(FreeMemSegment) ge integer-constant(1) & tokens-count(TaskOnDisk) ge integer-constant(1))) | tokens-count(TransferToDisk) ge integer-constant(1)))))

parallel: This job succeeded:
/home/mcc/BenchKit/start.sh 7250000 /home/mcc/BenchKit/bin/verifypn-linux64 -s\ DFS\ -d\ 10 ./model.pnml ./CTLFireability.xml -x 9

FORMULA SmallOperatingSystem-PT-MT8192DC2048-CTLFireability-8 TRUE TECHNIQUES COLLATERAL_PROCESSING EXPLICIT STRUCTURAL_REDUCTION STATE_COMPRESSION STUBBORN_SETS
------------------- QUERY 10 ----------------------
Solution found
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
LANGUAGE = (unset),
LC_ALL = (unset),
LANG = "fr_FR.UTF-8"
are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
LANGUAGE = (unset),
LC_ALL = (unset),
LANG = "fr_FR.UTF-8"
are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").

Parameters: -s DFS -d 10 ./model.pnml ./CTLFireability.xml -x 10

Parameters: -s DFS -q 0 -d 10 ./model.pnml ./CTLFireability.xml -x 10

Search=DFS,Trace=DISABLED,State_Space_Exploration=DISABLED,Structural_Reduction=AGGRESSIVE,Struct_Red_Timout=10,Stubborn_Reduction=ENABLED,Query_Simplication=ENABLED,QSTimeout=30,Siphon_Trap=DISABLED,LPSolve_Timeout=10

Query before reduction: AF (A ((LoadingMem >= 1) U ((TaskSuspended >= 1) and (CPUUnit >= 1))) or ((CPUUnit >= 1) and (TaskReady >= 1)))
Query after reduction: AF (A ((LoadingMem >= 1) U ((TaskSuspended >= 1) and (CPUUnit >= 1))) or ((CPUUnit >= 1) and (TaskReady >= 1)))
Query size reduced from 20 to 20 nodes (0.00 percent reduction).
Query reduction finished after 0.001300 seconds.


Query is satisfied.

STATS:
Time (seconds): 0.04134
Configurations: 20482
Markings: 8193
Edges: 16386
Processed Edges: 26628
Processed N. Edges: 0
Explored Configs: 12291
Query: AF(A(tokens-count(LoadingMem) ge integer-constant(1)) U ((tokens-count(TaskSuspended) ge integer-constant(1) & tokens-count(CPUUnit) ge integer-constant(1))) | (tokens-count(CPUUnit) ge integer-constant(1) & tokens-count(TaskReady) ge integer-constant(1)))

parallel: This job succeeded:
/home/mcc/BenchKit/start.sh 7250000 /home/mcc/BenchKit/bin/verifypn-linux64 -s\ DFS\ -d\ 10 ./model.pnml ./CTLFireability.xml -x 10

FORMULA SmallOperatingSystem-PT-MT8192DC2048-CTLFireability-9 TRUE TECHNIQUES COLLATERAL_PROCESSING EXPLICIT STRUCTURAL_REDUCTION STATE_COMPRESSION STUBBORN_SETS
------------------- QUERY 11 ----------------------
No solution found
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
LANGUAGE = (unset),
LC_ALL = (unset),
LANG = "fr_FR.UTF-8"
are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
LANGUAGE = (unset),
LC_ALL = (unset),
LANG = "fr_FR.UTF-8"
are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").

Parameters: -s DFS -d 10 ./model.pnml ./CTLFireability.xml -x 11

Parameters: -s DFS -q 0 -d 10 ./model.pnml ./CTLFireability.xml -x 11


------------------- QUERY 12 ----------------------
No solution found
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
LANGUAGE = (unset),
LC_ALL = (unset),
LANG = "fr_FR.UTF-8"
are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
LANGUAGE = (unset),
LC_ALL = (unset),
LANG = "fr_FR.UTF-8"
are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").

Parameters: -s DFS -d 10 ./model.pnml ./CTLFireability.xml -x 12

Parameters: -s DFS -q 0 -d 10 ./model.pnml ./CTLFireability.xml -x 12


------------------- QUERY 13 ----------------------
Solution found
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
LANGUAGE = (unset),
LC_ALL = (unset),
LANG = "fr_FR.UTF-8"
are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
LANGUAGE = (unset),
LC_ALL = (unset),
LANG = "fr_FR.UTF-8"
are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").

Parameters: -s DFS -d 10 ./model.pnml ./CTLFireability.xml -x 13

Parameters: -s DFS -q 0 -d 10 ./model.pnml ./CTLFireability.xml -x 13

Search=DFS,Trace=DISABLED,State_Space_Exploration=DISABLED,Structural_Reduction=AGGRESSIVE,Struct_Red_Timout=10,Stubborn_Reduction=ENABLED,Query_Simplication=ENABLED,QSTimeout=30,Siphon_Trap=DISABLED,LPSolve_Timeout=10

Query before reduction: EX E ((((CPUUnit >= 1) and (TaskReady >= 1)) or ((CPUUnit >= 1) and (TaskReady >= 1))) U (not ((DiskControllerUnit >= 1) and ((FreeMemSegment >= 1) and (TaskOnDisk >= 1)))))
Query after reduction: EX E ((((CPUUnit >= 1) and (TaskReady >= 1)) or ((CPUUnit >= 1) and (TaskReady >= 1))) U ((DiskControllerUnit < 1) or (FreeMemSegment < 1)))
Query size reduced from 28 to 24 nodes (14.29 percent reduction).
Query reduction finished after 0.003070 seconds.


Query is NOT satisfied.

STATS:
Time (seconds): 1.9e-05
Configurations: 2
Markings: 3
Edges: 1
Processed Edges: 2
Processed N. Edges: 0
Explored Configs: 2
Query: EXE(((tokens-count(CPUUnit) ge integer-constant(1) & tokens-count(TaskReady) ge integer-constant(1)) | (tokens-count(CPUUnit) ge integer-constant(1) & tokens-count(TaskReady) ge integer-constant(1)))) U ((tokens-count(DiskControllerUnit) ls integer-constant(1) | tokens-count(FreeMemSegment) ls integer-constant(1)))

parallel: This job succeeded:
/home/mcc/BenchKit/start.sh 7250000 /home/mcc/BenchKit/bin/verifypn-linux64 -s\ DFS\ -d\ 10 ./model.pnml ./CTLFireability.xml -x 13

FORMULA SmallOperatingSystem-PT-MT8192DC2048-CTLFireability-12 FALSE TECHNIQUES COLLATERAL_PROCESSING EXPLICIT STRUCTURAL_REDUCTION STATE_COMPRESSION STUBBORN_SETS
------------------- QUERY 14 ----------------------
Solution found
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
LANGUAGE = (unset),
LC_ALL = (unset),
LANG = "fr_FR.UTF-8"
are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
LANGUAGE = (unset),
LC_ALL = (unset),
LANG = "fr_FR.UTF-8"
are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").

Parameters: -s DFS -d 10 ./model.pnml ./CTLFireability.xml -x 14

Parameters: -s DFS -q 0 -d 10 ./model.pnml ./CTLFireability.xml -x 14

Search=DFS,Trace=DISABLED,State_Space_Exploration=DISABLED,Structural_Reduction=AGGRESSIVE,Struct_Red_Timout=10,Stubborn_Reduction=ENABLED,Query_Simplication=DISABLED,Siphon_Trap=DISABLED,LPSolve_Timeout=10


Query is satisfied.

STATS:
Time (seconds): 0.08937
Configurations: 24582
Markings: 8195
Edges: 26629
Processed Edges: 32781
Processed N. Edges: 0
Explored Configs: 16389
Query: AF(EF(tokens-count(TaskOnDisk) ge integer-constant(1) & (tokens-count(DiskControllerUnit) ge integer-constant(1) & tokens-count(TaskSuspended) ge integer-constant(1))) & EX((tokens-count(TaskOnDisk) ge integer-constant(1) & (tokens-count(DiskControllerUnit) ge integer-constant(1) & tokens-count(TaskSuspended) ge integer-constant(1))) | tokens-count(ExecutingTask) ge integer-constant(1)))


Search=DFS,Trace=DISABLED,State_Space_Exploration=DISABLED,Structural_Reduction=AGGRESSIVE,Struct_Red_Timout=10,Stubborn_Reduction=ENABLED,Query_Simplication=ENABLED,QSTimeout=30,Siphon_Trap=DISABLED,LPSolve_Timeout=10

Query before reduction: AF (EF ((TaskOnDisk >= 1) and ((DiskControllerUnit >= 1) and (TaskSuspended >= 1))) and EX (((TaskOnDisk >= 1) and ((DiskControllerUnit >= 1) and (TaskSuspended >= 1))) or (ExecutingTask >= 1)))
Query after reduction: AF (EF ((TaskOnDisk >= 1) and ((DiskControllerUnit >= 1) and (TaskSuspended >= 1))) and EX (((TaskOnDisk >= 1) and ((DiskControllerUnit >= 1) and (TaskSuspended >= 1))) or (ExecutingTask >= 1)))
Query size reduced from 30 to 30 nodes (0.00 percent reduction).
Query reduction finished after 0.003791 seconds.


Query is satisfied.

STATS:
Time (seconds): 0.09133
Configurations: 24582
Markings: 8195
Edges: 26629
Processed Edges: 32781
Processed N. Edges: 0
Explored Configs: 16389
Query: AF(EF(tokens-count(TaskOnDisk) ge integer-constant(1) & (tokens-count(DiskControllerUnit) ge integer-constant(1) & tokens-count(TaskSuspended) ge integer-constant(1))) & EX((tokens-count(TaskOnDisk) ge integer-constant(1) & (tokens-count(DiskControllerUnit) ge integer-constant(1) & tokens-count(TaskSuspended) ge integer-constant(1))) | tokens-count(ExecutingTask) ge integer-constant(1)))

parallel: This job succeeded:
/home/mcc/BenchKit/start.sh 7250000 /home/mcc/BenchKit/bin/verifypn-linux64 -s\ DFS\ -d\ 10 ./model.pnml ./CTLFireability.xml -x 14
parallel: This job succeeded:
/home/mcc/BenchKit/start.sh 14500000 /home/mcc/BenchKit/bin/verifypn-linux64 -s\ DFS\ -q\ 0\ -d\ 10 ./model.pnml ./CTLFireability.xml -x 14

FORMULA SmallOperatingSystem-PT-MT8192DC2048-CTLFireability-13 TRUE TECHNIQUES COLLATERAL_PROCESSING EXPLICIT STRUCTURAL_REDUCTION STATE_COMPRESSION STUBBORN_SETS
------------------- QUERY 15 ----------------------
Solution found
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
LANGUAGE = (unset),
LC_ALL = (unset),
LANG = "fr_FR.UTF-8"
are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
LANGUAGE = (unset),
LC_ALL = (unset),
LANG = "fr_FR.UTF-8"
are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").

Parameters: -s DFS -d 10 ./model.pnml ./CTLFireability.xml -x 15

Parameters: -s DFS -q 0 -d 10 ./model.pnml ./CTLFireability.xml -x 15

Search=DFS,Trace=DISABLED,State_Space_Exploration=DISABLED,Structural_Reduction=AGGRESSIVE,Struct_Red_Timout=10,Stubborn_Reduction=ENABLED,Query_Simplication=ENABLED,QSTimeout=30,Siphon_Trap=DISABLED,LPSolve_Timeout=10

Query before reduction: (not (AF (not (not (TaskReady >= 1))) or ((TaskReady >= 1) or EX (((DiskControllerUnit >= 1) and ((FreeMemSegment >= 1) and (TaskOnDisk >= 1))) and (TaskReady >= 1)))))
Query after reduction: (EG (TaskReady < 1) and ((TaskReady < 1) and AX (((DiskControllerUnit < 1) or (FreeMemSegment < 1)) or (TaskReady < 1))))
Query size reduced from 25 to 21 nodes (16.00 percent reduction).
Query reduction finished after 0.002086 seconds.


Query is NOT satisfied.

STATS:
Time (seconds): 0.02111
Configurations: 4101
Markings: 4097
Edges: 4101
Processed Edges: 8199
Processed N. Edges: 2
Explored Configs: 4101
Query: (!(AF!(tokens-count(TaskReady) ls integer-constant(1))) & (tokens-count(TaskReady) ls integer-constant(1) & AX((tokens-count(DiskControllerUnit) ls integer-constant(1) | tokens-count(FreeMemSegment) ls integer-constant(1)) | tokens-count(TaskReady) ls integer-constant(1))))

parallel: This job succeeded:
/home/mcc/BenchKit/start.sh 7250000 /home/mcc/BenchKit/bin/verifypn-linux64 -s\ DFS\ -d\ 10 ./model.pnml ./CTLFireability.xml -x 15

FORMULA SmallOperatingSystem-PT-MT8192DC2048-CTLFireability-14 FALSE TECHNIQUES COLLATERAL_PROCESSING EXPLICIT STRUCTURAL_REDUCTION STATE_COMPRESSION STUBBORN_SETS
------------------- QUERY 16 ----------------------
No solution found
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
LANGUAGE = (unset),
LC_ALL = (unset),
LANG = "fr_FR.UTF-8"
are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
LANGUAGE = (unset),
LC_ALL = (unset),
LANG = "fr_FR.UTF-8"
are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").

Parameters: -s DFS -d 10 ./model.pnml ./CTLFireability.xml -x 16

Parameters: -s DFS -q 0 -d 10 ./model.pnml ./CTLFireability.xml -x 16


---------------------------------------------------
Step 2: Sequential processing
---------------------------------------------------
Remaining queries are verified sequentially.
Each query is verified for a dynamic timeout (at least 480 seconds)
------------------- QUERY 1 ----------------------
Running query 1 for 538 seconds. Remaining: 6 queries and 3219 seconds

Parameters: -s DFS -d 100 -q 100 ./model.pnml ./CTLFireability.xml -x 1
No solution found
------------------- QUERY 3 ----------------------
Running query 3 for 618 seconds. Remaining: 5 queries and 3081 seconds

Parameters: -s DFS -d 100 -q 100 ./model.pnml ./CTLFireability.xml -x 3

Search=DFS,Trace=DISABLED,State_Space_Exploration=DISABLED,Structural_Reduction=AGGRESSIVE,Struct_Red_Timout=100,Stubborn_Reduction=ENABLED,Query_Simplication=ENABLED,QSTimeout=100,Siphon_Trap=DISABLED,LPSolve_Timeout=10

Query before reduction: EF AG ((CPUUnit >= 1) and (TaskReady >= 1))
Query after reduction: EF AG ((CPUUnit >= 1) and (TaskReady >= 1))
Query size reduced from 9 to 9 nodes (0.00 percent reduction).
Query reduction finished after 0.000784 seconds.
No solution found
------------------- QUERY 4 ----------------------
Running query 4 for 738 seconds. Remaining: 4 queries and 2945 seconds

Parameters: -s DFS -d 100 -q 100 ./model.pnml ./CTLFireability.xml -x 4

Search=DFS,Trace=DISABLED,State_Space_Exploration=DISABLED,Structural_Reduction=AGGRESSIVE,Struct_Red_Timout=100,Stubborn_Reduction=ENABLED,Query_Simplication=ENABLED,QSTimeout=100,Siphon_Trap=DISABLED,LPSolve_Timeout=10

Query before reduction: AG EF (ExecutingTask >= 1)
Query after reduction: AG EF (ExecutingTask >= 1)
Query size reduced from 5 to 5 nodes (0.00 percent reduction).
Query reduction finished after 0.000378 seconds.
No solution found
------------------- QUERY 11 ----------------------
Running query 11 for 932 seconds. Remaining: 3 queries and 2790 seconds

Parameters: -s DFS -d 100 -q 100 ./model.pnml ./CTLFireability.xml -x 11
No solution found
------------------- QUERY 12 ----------------------
Running query 12 for 1328 seconds. Remaining: 2 queries and 2653 seconds

Parameters: -s DFS -d 100 -q 100 ./model.pnml ./CTLFireability.xml -x 12
No solution found
------------------- QUERY 16 ----------------------
Running query 16 for 2509 seconds. Remaining: 1 queries and 2507 seconds

Parameters: -s DFS -d 100 -q 100 ./model.pnml ./CTLFireability.xml -x 16
No solution found
---------------------------------------------------
Step 3: Multiquery processing
---------------------------------------------------
Remaining 6 queries are solved using multiquery
Time remaining: 2372 seconds of the initial 3600 seconds
Running multiquery on -x 1,3,4,11,12,16 for 2372 seconds

Parameters: -s DFS -d 100 -q 100 -p ./model.pnml ./CTLFireability.xml -x 1,3,4,11,12,16
End of script.

BK_STOP 1494957341997

--------------------
content from stderr:

Command terminated by signal 11
Command being timed: "timeout 538 /home/mcc/BenchKit/bin/verifypn-linux64 -s DFS -d 100 -q 100 ./model.pnml ./CTLFireability.xml -x 1"
User time (seconds): 128.45
System time (seconds): 9.40
Percent of CPU this job got: 99%
Elapsed (wall clock) time (h:mm:ss or m:ss): 2:17.97
Average shared text size (kbytes): 0
Average unshared data size (kbytes): 0
Average stack size (kbytes): 0
Average total size (kbytes): 0
Maximum resident set size (kbytes): 14438120
Average resident set size (kbytes): 0
Major (requiring I/O) page faults: 0
Minor (reclaiming a frame) page faults: 3740224
Voluntary context switches: 3
Involuntary context switches: 385
Swaps: 0
File system inputs: 0
File system outputs: 0
Socket messages sent: 0
Socket messages received: 0
Signals delivered: 0
Page size (bytes): 4096
Exit status: 0
terminate called after throwing an instance of 'std::bad_alloc'
what(): std::bad_alloc
Command terminated by signal 6
Command being timed: "timeout 618 /home/mcc/BenchKit/bin/verifypn-linux64 -s DFS -d 100 -q 100 ./model.pnml ./CTLFireability.xml -x 3"
User time (seconds): 126.54
System time (seconds): 9.25
Percent of CPU this job got: 99%
Elapsed (wall clock) time (h:mm:ss or m:ss): 2:15.95
Average shared text size (kbytes): 0
Average unshared data size (kbytes): 0
Average stack size (kbytes): 0
Average total size (kbytes): 0
Maximum resident set size (kbytes): 14473420
Average resident set size (kbytes): 0
Major (requiring I/O) page faults: 0
Minor (reclaiming a frame) page faults: 3748918
Voluntary context switches: 5
Involuntary context switches: 389
Swaps: 0
File system inputs: 384
File system outputs: 8
Socket messages sent: 0
Socket messages received: 0
Signals delivered: 0
Page size (bytes): 4096
Exit status: 0
terminate called after throwing an instance of 'std::bad_alloc'
what(): std::bad_alloc
Command terminated by signal 6
Command being timed: "timeout 738 /home/mcc/BenchKit/bin/verifypn-linux64 -s DFS -d 100 -q 100 ./model.pnml ./CTLFireability.xml -x 4"
User time (seconds): 145.40
System time (seconds): 9.19
Percent of CPU this job got: 99%
Elapsed (wall clock) time (h:mm:ss or m:ss): 2:34.61
Average shared text size (kbytes): 0
Average unshared data size (kbytes): 0
Average stack size (kbytes): 0
Average total size (kbytes): 0
Maximum resident set size (kbytes): 14390456
Average resident set size (kbytes): 0
Major (requiring I/O) page faults: 0
Minor (reclaiming a frame) page faults: 3662620
Voluntary context switches: 3
Involuntary context switches: 276
Swaps: 0
File system inputs: 0
File system outputs: 8
Socket messages sent: 0
Socket messages received: 0
Signals delivered: 0
Page size (bytes): 4096
Exit status: 0
Command terminated by signal 11
Command being timed: "timeout 932 /home/mcc/BenchKit/bin/verifypn-linux64 -s DFS -d 100 -q 100 ./model.pnml ./CTLFireability.xml -x 11"
User time (seconds): 127.31
System time (seconds): 9.55
Percent of CPU this job got: 99%
Elapsed (wall clock) time (h:mm:ss or m:ss): 2:17.03
Average shared text size (kbytes): 0
Average unshared data size (kbytes): 0
Average stack size (kbytes): 0
Average total size (kbytes): 0
Maximum resident set size (kbytes): 14438140
Average resident set size (kbytes): 0
Major (requiring I/O) page faults: 0
Minor (reclaiming a frame) page faults: 3740178
Voluntary context switches: 3
Involuntary context switches: 378
Swaps: 0
File system inputs: 0
File system outputs: 0
Socket messages sent: 0
Socket messages received: 0
Signals delivered: 0
Page size (bytes): 4096
Exit status: 0
Command terminated by signal 11
Command being timed: "timeout 1328 /home/mcc/BenchKit/bin/verifypn-linux64 -s DFS -d 100 -q 100 ./model.pnml ./CTLFireability.xml -x 12"
User time (seconds): 136.70
System time (seconds): 9.42
Percent of CPU this job got: 99%
Elapsed (wall clock) time (h:mm:ss or m:ss): 2:26.14
Average shared text size (kbytes): 0
Average unshared data size (kbytes): 0
Average stack size (kbytes): 0
Average total size (kbytes): 0
Maximum resident set size (kbytes): 14479236
Average resident set size (kbytes): 0
Major (requiring I/O) page faults: 0
Minor (reclaiming a frame) page faults: 3685040
Voluntary context switches: 3
Involuntary context switches: 259
Swaps: 0
File system inputs: 0
File system outputs: 0
Socket messages sent: 0
Socket messages received: 0
Signals delivered: 0
Page size (bytes): 4096
Exit status: 0
Command terminated by signal 11
Command being timed: "timeout 2509 /home/mcc/BenchKit/bin/verifypn-linux64 -s DFS -d 100 -q 100 ./model.pnml ./CTLFireability.xml -x 16"
User time (seconds): 127.02
System time (seconds): 9.38
Percent of CPU this job got: 99%
Elapsed (wall clock) time (h:mm:ss or m:ss): 2:16.57
Average shared text size (kbytes): 0
Average unshared data size (kbytes): 0
Average stack size (kbytes): 0
Average total size (kbytes): 0
Maximum resident set size (kbytes): 14253828
Average resident set size (kbytes): 0
Major (requiring I/O) page faults: 0
Minor (reclaiming a frame) page faults: 3694235
Voluntary context switches: 3
Involuntary context switches: 392
Swaps: 0
File system inputs: 0
File system outputs: 0
Socket messages sent: 0
Socket messages received: 0
Signals delivered: 0
Page size (bytes): 4096
Exit status: 0
Command terminated by signal 11
Command being timed: "timeout 2372 /home/mcc/BenchKit/bin/verifypn-linux64 -s DFS -d 100 -q 100 -p ./model.pnml ./CTLFireability.xml -x 1,3,4,11,12,16"
User time (seconds): 127.32
System time (seconds): 9.36
Percent of CPU this job got: 99%
Elapsed (wall clock) time (h:mm:ss or m:ss): 2:16.69
Average shared text size (kbytes): 0
Average unshared data size (kbytes): 0
Average stack size (kbytes): 0
Average total size (kbytes): 0
Maximum resident set size (kbytes): 14438144
Average resident set size (kbytes): 0
Major (requiring I/O) page faults: 0
Minor (reclaiming a frame) page faults: 3740844
Voluntary context switches: 3
Involuntary context switches: 242
Swaps: 0
File system inputs: 0
File system outputs: 0
Socket messages sent: 0
Socket messages received: 0
Signals delivered: 0
Page size (bytes): 4096
Exit status: 0

Sequence of Actions to be Executed by the VM

This is useful if one wants to reexecute the tool in the VM from the submitted image disk.

set -x
# this is for BenchKit: configuration of major elements for the test
export BK_INPUT="SmallOperatingSystem-PT-MT8192DC2048"
export BK_EXAMINATION="CTLFireability"
export BK_TOOL="tapaal"
export BK_RESULT_DIR="/tmp/BK_RESULTS/OUTPUTS"
export BK_TIME_CONFINEMENT="3600"
export BK_MEMORY_CONFINEMENT="16384"

# this is specific to your benchmark or test

export BIN_DIR="$HOME/BenchKit/bin"

# remove the execution directoty if it exists (to avoid increse of .vmdk images)
if [ -d execution ] ; then
rm -rf execution
fi

tar xzf /home/mcc/BenchKit/INPUTS/SmallOperatingSystem-PT-MT8192DC2048.tgz
mv SmallOperatingSystem-PT-MT8192DC2048 execution

# this is for BenchKit: explicit launching of the test

cd execution
echo "====================================================================="
echo " Generated by BenchKit 2-3253"
echo " Executing tool tapaal"
echo " Input is SmallOperatingSystem-PT-MT8192DC2048, examination is CTLFireability"
echo " Time confinement is $BK_TIME_CONFINEMENT seconds"
echo " Memory confinement is 16384 MBytes"
echo " Number of cores is 4"
echo " Run identifier is r079-ebro-149441009300049"
echo "====================================================================="
echo
echo "--------------------"
echo "content from stdout:"
echo
echo "=== Data for post analysis generated by BenchKit (invocation template)"
echo
if [ "CTLFireability" = "UpperBounds" ] ; then
echo "The expected result is a vector of positive values"
echo NUM_VECTOR
elif [ "CTLFireability" != "StateSpace" ] ; then
echo "The expected result is a vector of booleans"
echo BOOL_VECTOR
else
echo "no data necessary for post analysis"
fi
echo
if [ -f "CTLFireability.txt" ] ; then
echo "here is the order used to build the result vector(from text file)"
for x in $(grep Property CTLFireability.txt | cut -d ' ' -f 2 | sort -u) ; do
echo "FORMULA_NAME $x"
done
elif [ -f "CTLFireability.xml" ] ; then # for cunf (txt files deleted;-)
echo echo "here is the order used to build the result vector(from xml file)"
for x in $(grep '' CTLFireability.xml | cut -d '>' -f 2 | cut -d '<' -f 1 | sort -u) ; do
echo "FORMULA_NAME $x"
done
fi
echo
echo "=== Now, execution of the tool begins"
echo
echo -n "BK_START "
date -u +%s%3N
echo
timeout -s 9 $BK_TIME_CONFINEMENT bash -c "/home/mcc/BenchKit/BenchKit_head.sh 2> STDERR ; echo ; echo -n \"BK_STOP \" ; date -u +%s%3N"
if [ $? -eq 137 ] ; then
echo
echo "BK_TIME_CONFINEMENT_REACHED"
fi
echo
echo "--------------------"
echo "content from stderr:"
echo
cat STDERR ;