fond
Model Checking Contest 2025
15th edition, Paris, France, June 24, 2025
Execution of r018-smll-174853767200238
Last Updated
June 24, 2025

About the Execution of Tapaal for BridgeAndVehicles-COL-V50P20N20

Execution Summary
Max Memory
Used (MB)
Time wait (ms) CPU Usage (ms) I/O Wait (ms) Computed Result Execution
Status
15688.920 864097.00 1004792.00 2351.50 FFTFFFTFTFFTFTFF normal

Execution Chart

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

Trace from the execution

Formatting '/data/fkordon/mcc2025-input.r018-smll-174853767200238.qcow2', fmt=qcow2 size=4294967296 backing_file=/data/fkordon/mcc2025-input.qcow2 backing_fmt=qcow2 cluster_size=65536 lazy_refcounts=off refcount_bits=16
Waiting for the VM to be ready (probing ssh)
..............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................
=====================================================================
Generated by BenchKit 2-5832
Executing tool tapaal
Input is BridgeAndVehicles-COL-V50P20N20, examination is ReachabilityCardinality
Time confinement is 3600 seconds
Memory confinement is 16384 MBytes
Number of cores is 4
Run identifier is r018-smll-174853767200238
=====================================================================

--------------------
preparation of the directory to be used:
/home/mcc/execution
total 588K
-rw-r--r-- 1 mcc users 8.3K May 29 14:47 CTLCardinality.txt
-rw-r--r-- 1 mcc users 80K May 29 14:47 CTLCardinality.xml
-rw-r--r-- 1 mcc users 7.1K May 29 14:47 CTLFireability.txt
-rw-r--r-- 1 mcc users 54K May 29 14:47 CTLFireability.xml
-rw-r--r-- 1 mcc users 4.2K May 29 14:32 GenericPropertiesDefinition.xml
-rw-r--r-- 1 mcc users 6.4K May 29 14:32 GenericPropertiesVerdict.xml
-rw-r--r-- 1 mcc users 4.1K May 29 14:47 LTLCardinality.txt
-rw-r--r-- 1 mcc users 26K May 29 14:47 LTLCardinality.xml
-rw-r--r-- 1 mcc users 3.0K May 29 14:47 LTLFireability.txt
-rw-r--r-- 1 mcc users 20K May 29 14:47 LTLFireability.xml
-rw-r--r-- 1 mcc users 16K May 29 14:47 ReachabilityCardinality.txt
-rw-r--r-- 1 mcc users 153K May 29 14:47 ReachabilityCardinality.xml
-rw-r--r-- 1 mcc users 14K May 29 14:47 ReachabilityFireability.txt
-rw-r--r-- 1 mcc users 104K May 29 14:47 ReachabilityFireability.xml
-rw-r--r-- 1 mcc users 1.9K May 29 14:47 UpperBounds.txt
-rw-r--r-- 1 mcc users 3.9K May 29 14:47 UpperBounds.xml
-rw-r--r-- 1 mcc users 5 May 29 14:32 equiv_pt
-rw-r--r-- 1 mcc users 10 May 29 14:32 instance
-rw-r--r-- 1 mcc users 5 May 29 14:32 iscolored
-rw-r--r-- 1 mcc users 42K May 29 14:32 model.pnml

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

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

The expected result is a vector of booleans
BOOL_VECTOR

echo here is the order used to build the result vector(from xml file)
FORMULA_NAME BridgeAndVehicles-COL-V50P20N20-ReachabilityCardinality-2025-00
FORMULA_NAME BridgeAndVehicles-COL-V50P20N20-ReachabilityCardinality-2025-01
FORMULA_NAME BridgeAndVehicles-COL-V50P20N20-ReachabilityCardinality-2025-02
FORMULA_NAME BridgeAndVehicles-COL-V50P20N20-ReachabilityCardinality-2025-03
FORMULA_NAME BridgeAndVehicles-COL-V50P20N20-ReachabilityCardinality-2025-04
FORMULA_NAME BridgeAndVehicles-COL-V50P20N20-ReachabilityCardinality-2025-05
FORMULA_NAME BridgeAndVehicles-COL-V50P20N20-ReachabilityCardinality-2025-06
FORMULA_NAME BridgeAndVehicles-COL-V50P20N20-ReachabilityCardinality-2025-07
FORMULA_NAME BridgeAndVehicles-COL-V50P20N20-ReachabilityCardinality-2025-08
FORMULA_NAME BridgeAndVehicles-COL-V50P20N20-ReachabilityCardinality-2025-09
FORMULA_NAME BridgeAndVehicles-COL-V50P20N20-ReachabilityCardinality-2025-10
FORMULA_NAME BridgeAndVehicles-COL-V50P20N20-ReachabilityCardinality-2025-11
FORMULA_NAME BridgeAndVehicles-COL-V50P20N20-ReachabilityCardinality-2025-12
FORMULA_NAME BridgeAndVehicles-COL-V50P20N20-ReachabilityCardinality-2025-13
FORMULA_NAME BridgeAndVehicles-COL-V50P20N20-ReachabilityCardinality-2025-14
FORMULA_NAME BridgeAndVehicles-COL-V50P20N20-ReachabilityCardinality-2025-15

=== Now, execution of the tool begins

BK_START 1748780072142

tapaal
Got BK_BIN_PATH=/home/mcc/BenchKit/bin/
---> tapaal --- TAPAAL 2025-v2
Setting MODEL_PATH=.
Setting VERIFYPN=/home/mcc/BenchKit/bin/verifypn
Got BK_TIME_CONFINEMENT=3600
Setting TEMPDIR=/home/mcc/BenchKit/bin/tmp
Got BK_MEMORY_CONFINEMENT=16384
Limiting to 16265216 kB
Total timeout: 3590
Time left: 3590

**********************************************
* TAPAAL verifying ReachabilityCardinality *
**********************************************
TEMPDIR=/home/mcc/BenchKit/bin/tmp
QF=/home/mcc/BenchKit/bin/tmp/tmp.NnQ3mUY0Cs
MF=/home/mcc/BenchKit/bin/tmp/tmp.j9JIkpjnWo
Time left: 3590
---------------------------------------------------
Step -1: Stripping Colors
---------------------------------------------------
Verifying stripped models (16 in total)
Solution found by stripping colors (step -1) for query index 0
Solution found by stripping colors (step -1) for query index 1
Solution found by stripping colors (step -1) for query index 4
Solution found by stripping colors (step -1) for query index 5
Solution found by stripping colors (step -1) for query index 6
Solution found by stripping colors (step -1) for query index 7
Solution found by stripping colors (step -1) for query index 8
Solution found by stripping colors (step -1) for query index 9
Solution found by stripping colors (step -1) for query index 10
Solution found by stripping colors (step -1) for query index 13
Solution found by stripping colors (step -1) for query index 15

FORMULA BridgeAndVehicles-COL-V50P20N20-ReachabilityCardinality-2025-00 FALSE TECHNIQUES COLLATERAL_PROCESSING STRUCTURAL_REDUCTION QUERY_REDUCTION SAT_SMT LP_APPROX CPN_APPROX
Query index 0 was solved

Query is NOT satisfied.

Solved using CPN Approximation



FORMULA BridgeAndVehicles-COL-V50P20N20-ReachabilityCardinality-2025-01 FALSE TECHNIQUES COLLATERAL_PROCESSING STRUCTURAL_REDUCTION QUERY_REDUCTION SAT_SMT LP_APPROX CPN_APPROX
Query index 1 was solved

Query is NOT satisfied.

Solved using CPN Approximation



FORMULA BridgeAndVehicles-COL-V50P20N20-ReachabilityCardinality-2025-04 FALSE TECHNIQUES COLLATERAL_PROCESSING STRUCTURAL_REDUCTION QUERY_REDUCTION SAT_SMT LP_APPROX CPN_APPROX
Query index 4 was solved

Query is NOT satisfied.

Solved using CPN Approximation



FORMULA BridgeAndVehicles-COL-V50P20N20-ReachabilityCardinality-2025-05 FALSE TECHNIQUES COLLATERAL_PROCESSING STRUCTURAL_REDUCTION QUERY_REDUCTION SAT_SMT LP_APPROX CPN_APPROX
Query index 5 was solved

Query is NOT satisfied.

Solved using CPN Approximation



FORMULA BridgeAndVehicles-COL-V50P20N20-ReachabilityCardinality-2025-06 TRUE TECHNIQUES COLLATERAL_PROCESSING STRUCTURAL_REDUCTION QUERY_REDUCTION SAT_SMT LP_APPROX CPN_APPROX
Query index 6 was solved

Query is satisfied.

Solved using CPN Approximation



FORMULA BridgeAndVehicles-COL-V50P20N20-ReachabilityCardinality-2025-07 FALSE TECHNIQUES COLLATERAL_PROCESSING STRUCTURAL_REDUCTION QUERY_REDUCTION SAT_SMT LP_APPROX CPN_APPROX
Query index 7 was solved

Query is NOT satisfied.

Solved using CPN Approximation



FORMULA BridgeAndVehicles-COL-V50P20N20-ReachabilityCardinality-2025-08 TRUE TECHNIQUES COLLATERAL_PROCESSING STRUCTURAL_REDUCTION QUERY_REDUCTION SAT_SMT LP_APPROX CPN_APPROX
Query index 8 was solved

Query is satisfied.

Solved using CPN Approximation



FORMULA BridgeAndVehicles-COL-V50P20N20-ReachabilityCardinality-2025-09 FALSE TECHNIQUES COLLATERAL_PROCESSING STRUCTURAL_REDUCTION QUERY_REDUCTION SAT_SMT LP_APPROX CPN_APPROX
Query index 9 was solved

Query is NOT satisfied.

Solved using CPN Approximation



FORMULA BridgeAndVehicles-COL-V50P20N20-ReachabilityCardinality-2025-10 FALSE TECHNIQUES COLLATERAL_PROCESSING STRUCTURAL_REDUCTION QUERY_REDUCTION SAT_SMT LP_APPROX CPN_APPROX
Query index 10 was solved

Query is NOT satisfied.

Solved using CPN Approximation



FORMULA BridgeAndVehicles-COL-V50P20N20-ReachabilityCardinality-2025-13 TRUE TECHNIQUES COLLATERAL_PROCESSING STRUCTURAL_REDUCTION QUERY_REDUCTION SAT_SMT LP_APPROX CPN_APPROX
Query index 13 was solved

Query is satisfied.

Solved using CPN Approximation



FORMULA BridgeAndVehicles-COL-V50P20N20-ReachabilityCardinality-2025-15 FALSE TECHNIQUES COLLATERAL_PROCESSING STRUCTURAL_REDUCTION QUERY_REDUCTION SAT_SMT LP_APPROX CPN_APPROX
Query index 15 was solved

Query is NOT satisfied.

Solved using CPN Approximation



Unable to decide if BridgeAndVehicles-COL-V50P20N20-ReachabilityCardinality-2025-14 is satisfied.

Query is MAYBE satisfied.


Unable to decide if BridgeAndVehicles-COL-V50P20N20-ReachabilityCardinality-2025-02 is satisfied.

Query is MAYBE satisfied.


Unable to decide if BridgeAndVehicles-COL-V50P20N20-ReachabilityCardinality-2025-12 is satisfied.

Query is MAYBE satisfied.


Unable to decide if BridgeAndVehicles-COL-V50P20N20-ReachabilityCardinality-2025-03 is satisfied.

Query is MAYBE satisfied.


Unable to decide if BridgeAndVehicles-COL-V50P20N20-ReachabilityCardinality-2025-11 is satisfied.

Query is MAYBE satisfied.

Spent 498.095 on verification
Time left: 3092
---------------------------------------------------
Step -0.5: Explicit parallel processing
---------------------------------------------------
Doing explicit parallel verification of individual queries (5 in total)
Each query is verified by 4 parallel strategies for 119 seconds
------------------- QUERY 3 ----------------------

Parameters: -C -s BestFS --colored-successor-generator fixed -q 0 ./model.pnml ./ReachabilityCardinality.xml -x 3

Search=HEUR,Trace=DISABLED,PrintBindings=DISABLED,State_Space_Exploration=DISABLED,Colored_Structural_Reduction=ALL,Colored_Struct_Red_Timout=30,Structural_Reduction=AGGRESSIVE,Struct_Red_Timout=60,Stubborn_Reduction=ENABLED,Query_Simplication=DISABLED,Init_Potency=ENABLED,InitPotencyTimeout=10,Siphon_Trap=DISABLED,LPSolve_Timeout=10,ExplicitColored=ENABLED,ColoredSuccessorGenerator=FIXED

Colored structural reductions computed in 0.00027 seconds
Reduced from 15 to 14 places (1, 6.66667%)
Reduced from 11 to 11 transitions (0, 0%)
Applications of rule AtomicPreAgglomeration: 0
Applications of rule DeadTransitions: 0
Applications of rule ParallelPlaces: 0
Applications of rule ParallelTransitions: 0
Applications of rule PreemptiveFiring: 0
Applications of rule RedundantPlaces: 0
Applications of rule Relevance: 1


Parameters: -C -s BFS --colored-successor-generator even -R 0 -q 0 ./model.pnml ./ReachabilityCardinality.xml -x 3

Parameters: -C -s DFS --colored-successor-generator even -q 0 ./model.pnml ./ReachabilityCardinality.xml -x 3

Parameters: -C -s RDFS --colored-successor-generator even ./model.pnml ./ReachabilityCardinality.xml -x 3

Search=RDFS,Trace=DISABLED,PrintBindings=DISABLED,State_Space_Exploration=DISABLED,Colored_Structural_Reduction=ALL,Colored_Struct_Red_Timout=30,Structural_Reduction=AGGRESSIVE,Struct_Red_Timout=60,Stubborn_Reduction=ENABLED,Query_Simplication=ENABLED,QSTimeout=30,Init_Potency=ENABLED,InitPotencyTimeout=10,Siphon_Trap=DISABLED,LPSolve_Timeout=10,ExplicitColored=ENABLED,ColoredSuccessorGenerator=EVEN

Colored structural reductions computed in 0.000336 seconds
Reduced from 15 to 14 places (1, 6.66667%)
Reduced from 11 to 11 transitions (0, 0%)
Applications of rule AtomicPreAgglomeration: 0
Applications of rule DeadTransitions: 0
Applications of rule ParallelPlaces: 0
Applications of rule ParallelTransitions: 0
Applications of rule PreemptiveFiring: 0
Applications of rule RedundantPlaces: 0
Applications of rule Relevance: 1


Query before reduction: EF ((52 <= SORTI_A) or (ROUTE_A <= CHOIX))
RWSTATS PRE:0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
RWSTATS POST:0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,

Query after reduction: EF (ROUTE_A <= CHOIX)
Query reduction finished after 0.000604 seconds.
Query size reduced from 8 to 4 nodes ( 50 percent reduction).
Query index 0 was solved

Query is satisfied
STATS:
discovered states: 559
explored states: 559
peak waiting states: 558
end waiting states: 558
biggest encoded state: 44 bytes
@@@0.04,6956@@@

Search=DFS,Trace=DISABLED,PrintBindings=DISABLED,State_Space_Exploration=DISABLED,Colored_Structural_Reduction=ALL,Colored_Struct_Red_Timout=30,Structural_Reduction=AGGRESSIVE,Struct_Red_Timout=60,Stubborn_Reduction=ENABLED,Query_Simplication=DISABLED,Init_Potency=ENABLED,InitPotencyTimeout=10,Siphon_Trap=DISABLED,LPSolve_Timeout=10,ExplicitColored=ENABLED,ColoredSuccessorGenerator=EVEN

Colored structural reductions computed in 0.001431 seconds
Reduced from 15 to 14 places (1, 6.66667%)
Reduced from 11 to 11 transitions (0, 0%)
Applications of rule AtomicPreAgglomeration: 0
Applications of rule DeadTransitions: 0
Applications of rule ParallelPlaces: 0
Applications of rule ParallelTransitions: 0
Applications of rule PreemptiveFiring: 0
Applications of rule RedundantPlaces: 0
Applications of rule Relevance: 1

Query index 0 was solved

Query is satisfied
STATS:
discovered states: 50
explored states: 50
peak waiting states: 49
end waiting states: 49
biggest encoded state: 38 bytes
parallel: This job succeeded:
eval /usr/bin/time -f "@@@%e,%M@@@" /home/mcc/BenchKit/bin/verifypn '-C -s RDFS --colored-successor-generator even' ./model.pnml ./ReachabilityCardinality.xml -x 3
@@@0.04,5624@@@
parallel: This job succeeded:
eval /usr/bin/time -f "@@@%e,%M@@@" /home/mcc/BenchKit/bin/verifypn '-C -s DFS --colored-successor-generator even -q 0' ./model.pnml ./ReachabilityCardinality.xml -x 3
Solution found by explicit exploration (step -0.5)

FORMULA BridgeAndVehicles-COL-V50P20N20-ReachabilityCardinality-2025-02 TRUE TECHNIQUES STRUCTURAL_REDUCTION CPN_EXPLICIT
Time left: 3091
------------------- QUERY 4 ----------------------

Parameters: -C -s RDFS --colored-successor-generator even ./model.pnml ./ReachabilityCardinality.xml -x 4

Search=RDFS,Trace=DISABLED,PrintBindings=DISABLED,State_Space_Exploration=DISABLED,Colored_Structural_Reduction=ALL,Colored_Struct_Red_Timout=30,Structural_Reduction=AGGRESSIVE,Struct_Red_Timout=60,Stubborn_Reduction=ENABLED,Query_Simplication=ENABLED,QSTimeout=30,Init_Potency=ENABLED,InitPotencyTimeout=10,Siphon_Trap=DISABLED,LPSolve_Timeout=10,ExplicitColored=ENABLED,ColoredSuccessorGenerator=EVEN

Colored structural reductions computed in 0.00028 seconds
Reduced from 15 to 13 places (2, 13.3333%)
Reduced from 11 to 11 transitions (0, 0%)
Applications of rule AtomicPreAgglomeration: 0
Applications of rule DeadTransitions: 0
Applications of rule ParallelPlaces: 0
Applications of rule ParallelTransitions: 0
Applications of rule PreemptiveFiring: 0
Applications of rule RedundantPlaces: 0
Applications of rule Relevance: 1


Parameters: -C -s BFS --colored-successor-generator even -R 0 -q 0 ./model.pnml ./ReachabilityCardinality.xml -x 4

Parameters: -C -s DFS --colored-successor-generator even -q 0 ./model.pnml ./ReachabilityCardinality.xml -x 4

Search=DFS,Trace=DISABLED,PrintBindings=DISABLED,State_Space_Exploration=DISABLED,Colored_Structural_Reduction=ALL,Colored_Struct_Red_Timout=30,Structural_Reduction=AGGRESSIVE,Struct_Red_Timout=60,Stubborn_Reduction=ENABLED,Query_Simplication=DISABLED,Init_Potency=ENABLED,InitPotencyTimeout=10,Siphon_Trap=DISABLED,LPSolve_Timeout=10,ExplicitColored=ENABLED,ColoredSuccessorGenerator=EVEN

Colored structural reductions computed in 0.000258 seconds
Reduced from 15 to 13 places (2, 13.3333%)
Reduced from 11 to 11 transitions (0, 0%)
Applications of rule AtomicPreAgglomeration: 0
Applications of rule DeadTransitions: 0
Applications of rule ParallelPlaces: 0
Applications of rule ParallelTransitions: 0
Applications of rule PreemptiveFiring: 0
Applications of rule RedundantPlaces: 0
Applications of rule Relevance: 1

Query index 0 was solved

Query is NOT satisfied
STATS:
discovered states: 1872
explored states: 1143
peak waiting states: 413
end waiting states: 273
biggest encoded state: 37 bytes
Command exited with non-zero status 1
@@@0.02,6028@@@

Parameters: -C -s BestFS --colored-successor-generator fixed -q 0 ./model.pnml ./ReachabilityCardinality.xml -x 4

Search=HEUR,Trace=DISABLED,PrintBindings=DISABLED,State_Space_Exploration=DISABLED,Colored_Structural_Reduction=ALL,Colored_Struct_Red_Timout=30,Structural_Reduction=AGGRESSIVE,Struct_Red_Timout=60,Stubborn_Reduction=ENABLED,Query_Simplication=DISABLED,Init_Potency=ENABLED,InitPotencyTimeout=10,Siphon_Trap=DISABLED,LPSolve_Timeout=10,ExplicitColored=ENABLED,ColoredSuccessorGenerator=FIXED

Colored structural reductions computed in 0.000268 seconds
Reduced from 15 to 13 places (2, 13.3333%)
Reduced from 11 to 11 transitions (0, 0%)
Applications of rule AtomicPreAgglomeration: 0
Applications of rule DeadTransitions: 0
Applications of rule ParallelPlaces: 0
Applications of rule ParallelTransitions: 0
Applications of rule PreemptiveFiring: 0
Applications of rule RedundantPlaces: 0
Applications of rule Relevance: 1


Query before reduction: AG ((SUR_PONT_A <= 10) or (52 <= COMPTEUR))
RWSTATS PRE:0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
RWSTATS POST:0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,

Query after reduction: (not EF (10 < SUR_PONT_A))
Query reduction finished after 0.000366 seconds.
Query size reduced from 8 to 5 nodes ( 37.5 percent reduction).
Query index 0 was solved

Query is NOT satisfied
STATS:
discovered states: 2300
explored states: 1587
peak waiting states: 960
end waiting states: 733
biggest encoded state: 41 bytes
Command exited with non-zero status 1
@@@0.07,7620@@@

Search=BFS,Trace=DISABLED,PrintBindings=DISABLED,State_Space_Exploration=DISABLED,Colored_Structural_Reduction=DISABLED,Colored_Struct_Red_Timout=30,Structural_Reduction=AGGRESSIVE,Struct_Red_Timout=60,Stubborn_Reduction=ENABLED,Query_Simplication=DISABLED,Init_Potency=ENABLED,InitPotencyTimeout=10,Siphon_Trap=DISABLED,LPSolve_Timeout=10,ExplicitColored=ENABLED,ColoredSuccessorGenerator=EVEN
Query index 0 was solved

Query is NOT satisfied
STATS:
discovered states: 166818
explored states: 55811
peak waiting states: 8041
end waiting states: 8040
biggest encoded state: 47 bytes
Command exited with non-zero status 1
@@@1.11,19156@@@
parallel: Warning: This job was killed because it timed out:
parallel: Warning: eval /usr/bin/time -f "@@@%e,%M@@@" /home/mcc/BenchKit/bin/verifypn '-C -s BestFS --colored-successor-generator fixed -q 0' ./model.pnml ./ReachabilityCardinality.xml -x 4
Solution found by explicit exploration (step -0.5)

FORMULA BridgeAndVehicles-COL-V50P20N20-ReachabilityCardinality-2025-03 FALSE TECHNIQUES STRUCTURAL_REDUCTION CPN_EXPLICIT
Time left: 2969
------------------- QUERY 12 ----------------------

Parameters: -C -s BFS --colored-successor-generator even -R 0 -q 0 ./model.pnml ./ReachabilityCardinality.xml -x 12

Parameters: -C -s RDFS --colored-successor-generator even ./model.pnml ./ReachabilityCardinality.xml -x 12

Search=RDFS,Trace=DISABLED,PrintBindings=DISABLED,State_Space_Exploration=DISABLED,Colored_Structural_Reduction=ALL,Colored_Struct_Red_Timout=30,Structural_Reduction=AGGRESSIVE,Struct_Red_Timout=60,Stubborn_Reduction=ENABLED,Query_Simplication=ENABLED,QSTimeout=30,Init_Potency=ENABLED,InitPotencyTimeout=10,Siphon_Trap=DISABLED,LPSolve_Timeout=10,ExplicitColored=ENABLED,ColoredSuccessorGenerator=EVEN

Colored structural reductions computed in 0.000146 seconds
Reduced from 15 to 15 places (0, 0%)
Reduced from 11 to 11 transitions (0, 0%)
Applications of rule AtomicPreAgglomeration: 0
Applications of rule DeadTransitions: 0
Applications of rule ParallelPlaces: 0
Applications of rule ParallelTransitions: 0
Applications of rule PreemptiveFiring: 0
Applications of rule RedundantPlaces: 0
Applications of rule Relevance: 0
Could not do colored reductions

Parameters: -C -s BestFS --colored-successor-generator fixed -q 0 ./model.pnml ./ReachabilityCardinality.xml -x 12

Parameters: -C -s DFS --colored-successor-generator even -q 0 ./model.pnml ./ReachabilityCardinality.xml -x 12

Search=HEUR,Trace=DISABLED,PrintBindings=DISABLED,State_Space_Exploration=DISABLED,Colored_Structural_Reduction=ALL,Colored_Struct_Red_Timout=30,Structural_Reduction=AGGRESSIVE,Struct_Red_Timout=60,Stubborn_Reduction=ENABLED,Query_Simplication=DISABLED,Init_Potency=ENABLED,InitPotencyTimeout=10,Siphon_Trap=DISABLED,LPSolve_Timeout=10,ExplicitColored=ENABLED,ColoredSuccessorGenerator=FIXED

Colored structural reductions computed in 0.000129 seconds
Reduced from 15 to 15 places (0, 0%)
Reduced from 11 to 11 transitions (0, 0%)
Applications of rule AtomicPreAgglomeration: 0
Applications of rule DeadTransitions: 0
Applications of rule ParallelPlaces: 0
Applications of rule ParallelTransitions: 0
Applications of rule PreemptiveFiring: 0
Applications of rule RedundantPlaces: 0
Applications of rule Relevance: 0
Could not do colored reductions

Search=DFS,Trace=DISABLED,PrintBindings=DISABLED,State_Space_Exploration=DISABLED,Colored_Structural_Reduction=ALL,Colored_Struct_Red_Timout=30,Structural_Reduction=AGGRESSIVE,Struct_Red_Timout=60,Stubborn_Reduction=ENABLED,Query_Simplication=DISABLED,Init_Potency=ENABLED,InitPotencyTimeout=10,Siphon_Trap=DISABLED,LPSolve_Timeout=10,ExplicitColored=ENABLED,ColoredSuccessorGenerator=EVEN

Colored structural reductions computed in 0.000151 seconds
Reduced from 15 to 15 places (0, 0%)
Reduced from 11 to 11 transitions (0, 0%)
Applications of rule AtomicPreAgglomeration: 0
Applications of rule DeadTransitions: 0
Applications of rule ParallelPlaces: 0
Applications of rule ParallelTransitions: 0
Applications of rule PreemptiveFiring: 0
Applications of rule RedundantPlaces: 0
Applications of rule Relevance: 0
Could not do colored reductions

Query before reduction: EF (not ((not ((not (SUR_PONT_A <= 31)) and (COMPTEUR <= 88))) and ((19 <= ATTENTE_A) or ((not ((CONTROLEUR <= SORTI_A) or (SUR_PONT_B <= 27) or (ROUTE_A <= ATTENTE_B))) and ((not (ROUTE_A <= NB_ATTENTE_A)) or (SORTI_B <= 58))) or (SUR_PONT_B <= 94) or (not (ROUTE_A <= 58)) or (not (57 <= NB_ATTENTE_A)) or (not (SUR_PONT_A <= SORTI_B)) or ((SUR_PONT_A <= SORTI_A) and (VIDANGE <= 58)) or (not (ROUTE_B <= 99))) and (SUR_PONT_B <= 19)))
RWSTATS PRE:0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,7,0,0,0,0,
RWSTATS POST:0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,

Query after reduction: EF (19 < SUR_PONT_B)
Query reduction finished after 0.000719 seconds.
Query size reduced from 65 to 4 nodes ( 93.8462 percent reduction).
Query index 0 was solved

Query is satisfied
STATS:
discovered states: 2057
explored states: 1451
peak waiting states: 917
end waiting states: 756
biggest encoded state: 45 bytes
@@@0.03,7716@@@
parallel: This job succeeded:
eval /usr/bin/time -f "@@@%e,%M@@@" /home/mcc/BenchKit/bin/verifypn '-C -s RDFS --colored-successor-generator even' ./model.pnml ./ReachabilityCardinality.xml -x 12
Solution found by explicit exploration (step -0.5)

FORMULA BridgeAndVehicles-COL-V50P20N20-ReachabilityCardinality-2025-11 TRUE TECHNIQUES STRUCTURAL_REDUCTION CPN_EXPLICIT
Time left: 2969
------------------- QUERY 13 ----------------------

Parameters: -C -s DFS --colored-successor-generator even -q 0 ./model.pnml ./ReachabilityCardinality.xml -x 13

Parameters: -C -s BFS --colored-successor-generator even -R 0 -q 0 ./model.pnml ./ReachabilityCardinality.xml -x 13

Parameters: -C -s RDFS --colored-successor-generator even ./model.pnml ./ReachabilityCardinality.xml -x 13

Search=RDFS,Trace=DISABLED,PrintBindings=DISABLED,State_Space_Exploration=DISABLED,Colored_Structural_Reduction=ALL,Colored_Struct_Red_Timout=30,Structural_Reduction=AGGRESSIVE,Struct_Red_Timout=60,Stubborn_Reduction=ENABLED,Query_Simplication=ENABLED,QSTimeout=30,Init_Potency=ENABLED,InitPotencyTimeout=10,Siphon_Trap=DISABLED,LPSolve_Timeout=10,ExplicitColored=ENABLED,ColoredSuccessorGenerator=EVEN

Colored structural reductions computed in 0.000129 seconds
Reduced from 15 to 15 places (0, 0%)
Reduced from 11 to 11 transitions (0, 0%)
Applications of rule AtomicPreAgglomeration: 0
Applications of rule DeadTransitions: 0
Applications of rule ParallelPlaces: 0
Applications of rule ParallelTransitions: 0
Applications of rule PreemptiveFiring: 0
Applications of rule RedundantPlaces: 0
Applications of rule Relevance: 0
Could not do colored reductions

Search=DFS,Trace=DISABLED,PrintBindings=DISABLED,State_Space_Exploration=DISABLED,Colored_Structural_Reduction=ALL,Colored_Struct_Red_Timout=30,Structural_Reduction=AGGRESSIVE,Struct_Red_Timout=60,Stubborn_Reduction=ENABLED,Query_Simplication=DISABLED,Init_Potency=ENABLED,InitPotencyTimeout=10,Siphon_Trap=DISABLED,LPSolve_Timeout=10,ExplicitColored=ENABLED,ColoredSuccessorGenerator=EVEN

Colored structural reductions computed in 0.000113 seconds
Reduced from 15 to 15 places (0, 0%)
Reduced from 11 to 11 transitions (0, 0%)
Applications of rule AtomicPreAgglomeration: 0
Applications of rule DeadTransitions: 0
Applications of rule ParallelPlaces: 0
Applications of rule ParallelTransitions: 0
Applications of rule PreemptiveFiring: 0
Applications of rule RedundantPlaces: 0
Applications of rule Relevance: 0
Could not do colored reductions

Query before reduction: AG (not ((37 <= SORTI_A) and (not ((SUR_PONT_A <= ROUTE_B) and (VIDANGE <= 81) and ((NB_ATTENTE_A <= SUR_PONT_A) or (ROUTE_A <= 78)) and (not (SUR_PONT_B <= CONTROLEUR)) and (99 <= CAPACITE) and (68 <= CONTROLEUR) and (not (CHOIX <= SORTI_B)))) and (not ((((18 <= CHOIX) or (CAPACITE <= VIDANGE) or (30 <= ROUTE_B)) and (((CHOIX <= SUR_PONT_B) and (NB_ATTENTE_B <= 39)) or (not (66 <= ATTENTE_A)))) or (((ATTENTE_A <= ROUTE_A) or (SUR_PONT_A <= NB_ATTENTE_B)) and (SUR_PONT_B <= COMPTEUR) and (10 <= ROUTE_A) and (33 <= NB_ATTENTE_A) and (SORTI_B <= ROUTE_B))))))
RWSTATS PRE:0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,4,0,0,0,0,
RWSTATS POST:0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,

Query after reduction: (not EF ((37 <= SORTI_A) and (VIDANGE < CAPACITE) and (ROUTE_B < 30)))
Query reduction finished after 0.001815 seconds.
Query size reduced from 80 to 12 nodes ( 85 percent reduction).
Query index 0 was solved

Query is NOT satisfied
STATS:
discovered states: 697
explored states: 697
peak waiting states: 696
end waiting states: 696
biggest encoded state: 45 bytes
Query index 0 was solved

Query is NOT satisfied
STATS:
discovered states: 276
explored states: 276
peak waiting states: 275
end waiting states: 275
biggest encoded state: 43 bytes
Command exited with non-zero status 1
@@@0.00,5888@@@
Command exited with non-zero status 1
@@@0.01,7344@@@

Parameters: -C -s BestFS --colored-successor-generator fixed -q 0 ./model.pnml ./ReachabilityCardinality.xml -x 13

Search=HEUR,Trace=DISABLED,PrintBindings=DISABLED,State_Space_Exploration=DISABLED,Colored_Structural_Reduction=ALL,Colored_Struct_Red_Timout=30,Structural_Reduction=AGGRESSIVE,Struct_Red_Timout=60,Stubborn_Reduction=ENABLED,Query_Simplication=DISABLED,Init_Potency=ENABLED,InitPotencyTimeout=10,Siphon_Trap=DISABLED,LPSolve_Timeout=10,ExplicitColored=ENABLED,ColoredSuccessorGenerator=FIXED

Colored structural reductions computed in 0.000114 seconds
Reduced from 15 to 15 places (0, 0%)
Reduced from 11 to 11 transitions (0, 0%)
Applications of rule AtomicPreAgglomeration: 0
Applications of rule DeadTransitions: 0
Applications of rule ParallelPlaces: 0
Applications of rule ParallelTransitions: 0
Applications of rule PreemptiveFiring: 0
Applications of rule RedundantPlaces: 0
Applications of rule Relevance: 0
Could not do colored reductions
parallel: Warning: This job was killed because it timed out:
parallel: Warning: eval /usr/bin/time -f "@@@%e,%M@@@" /home/mcc/BenchKit/bin/verifypn '-C -s BFS --colored-successor-generator even -R 0 -q 0' ./model.pnml ./ReachabilityCardinality.xml -x 13
parallel: Warning: This job was killed because it timed out:
parallel: Warning: eval /usr/bin/time -f "@@@%e,%M@@@" /home/mcc/BenchKit/bin/verifypn '-C -s BestFS --colored-successor-generator fixed -q 0' ./model.pnml ./ReachabilityCardinality.xml -x 13
Solution found by explicit exploration (step -0.5)

FORMULA BridgeAndVehicles-COL-V50P20N20-ReachabilityCardinality-2025-12 FALSE TECHNIQUES STRUCTURAL_REDUCTION CPN_EXPLICIT
Time left: 2848
------------------- QUERY 15 ----------------------

Parameters: -C -s RDFS --colored-successor-generator even ./model.pnml ./ReachabilityCardinality.xml -x 15

Search=RDFS,Trace=DISABLED,PrintBindings=DISABLED,State_Space_Exploration=DISABLED,Colored_Structural_Reduction=ALL,Colored_Struct_Red_Timout=30,Structural_Reduction=AGGRESSIVE,Struct_Red_Timout=60,Stubborn_Reduction=ENABLED,Query_Simplication=ENABLED,QSTimeout=30,Init_Potency=ENABLED,InitPotencyTimeout=10,Siphon_Trap=DISABLED,LPSolve_Timeout=10,ExplicitColored=ENABLED,ColoredSuccessorGenerator=EVEN

Colored structural reductions computed in 0.000205 seconds
Reduced from 15 to 15 places (0, 0%)
Reduced from 11 to 11 transitions (0, 0%)
Applications of rule AtomicPreAgglomeration: 0
Applications of rule DeadTransitions: 0
Applications of rule ParallelPlaces: 0
Applications of rule ParallelTransitions: 0
Applications of rule PreemptiveFiring: 0
Applications of rule RedundantPlaces: 0
Applications of rule Relevance: 0
Could not do colored reductions

Parameters: -C -s BFS --colored-successor-generator even -R 0 -q 0 ./model.pnml ./ReachabilityCardinality.xml -x 15

Parameters: -C -s BestFS --colored-successor-generator fixed -q 0 ./model.pnml ./ReachabilityCardinality.xml -x 15

Search=HEUR,Trace=DISABLED,PrintBindings=DISABLED,State_Space_Exploration=DISABLED,Colored_Structural_Reduction=ALL,Colored_Struct_Red_Timout=30,Structural_Reduction=AGGRESSIVE,Struct_Red_Timout=60,Stubborn_Reduction=ENABLED,Query_Simplication=DISABLED,Init_Potency=ENABLED,InitPotencyTimeout=10,Siphon_Trap=DISABLED,LPSolve_Timeout=10,ExplicitColored=ENABLED,ColoredSuccessorGenerator=FIXED

Colored structural reductions computed in 0.000106 seconds
Reduced from 15 to 15 places (0, 0%)
Reduced from 11 to 11 transitions (0, 0%)
Applications of rule AtomicPreAgglomeration: 0
Applications of rule DeadTransitions: 0
Applications of rule ParallelPlaces: 0
Applications of rule ParallelTransitions: 0
Applications of rule PreemptiveFiring: 0
Applications of rule RedundantPlaces: 0
Applications of rule Relevance: 0
Could not do colored reductions

Query before reduction: AG ((((not ((61 <= NB_ATTENTE_A) and ((not (80 <= SORTI_B)) or (CHOIX <= 67)))) or (70 <= SORTI_B) or (((91 <= NB_ATTENTE_A) or (not ((52 <= SUR_PONT_B) and (CHOIX <= CHOIX)))) and (ROUTE_B <= 61) and ((11 <= CONTROLEUR) or ((49 <= COMPTEUR) and (CONTROLEUR <= CHOIX)) or (not ((96 <= NB_ATTENTE_B) and (VIDANGE <= SORTI_B)))))) and (CONTROLEUR <= ROUTE_B) and (((SORTI_A <= ROUTE_B) and (9 <= ROUTE_B)) or (((ATTENTE_A <= SORTI_B) or (26 <= COMPTEUR) or (26 <= SORTI_B) or (42 <= NB_ATTENTE_A) or (VIDANGE <= VIDANGE)) and (not ((NB_ATTENTE_B <= ROUTE_A) or (NB_ATTENTE_B <= SUR_PONT_B) or (SORTI_B <= 80) or (ROUTE_B <= VIDANGE))) and ((ROUTE_A <= CHOIX) or (SORTI_B <= 100) or (60 <= ATTENTE_A) or (CHOIX <= 81) or (not ((58 <= SORTI_B) or (SUR_PONT_A <= CHOIX) or (1 <= SUR_PONT_B))))) or ((not (((SORTI_A <= COMPTEUR) and (CHOIX <= SORTI_A)) or (SUR_PONT_A <= NB_ATTENTE_B))) and (VIDANGE <= SORTI_A) and ((NB_ATTENTE_B <= 9) or (ROUTE_A <= 25)) and ((59 <= NB_ATTENTE_A) or (ATTENTE_B <= COMPTEUR))) or (not (((ATTENTE_B <= NB_ATTENTE_A) or (ATTENTE_A <= VIDANGE)) and (CAPACITE <= ROUTE_A) and (COMPTEUR <= 5))))) or (((CAPACITE <= ATTENTE_A) or (NB_ATTENTE_B <= NB_ATTENTE_B)) and (not ((COMPTEUR <= 40) or ((46 <= SUR_PONT_A) and (18 <= SORTI_B) and ((ROUTE_A <= 6) or (86 <= SUR_PONT_B)) and (not (ATTENTE_B <= 60)))))) or ((not (100 <= COMPTEUR)) and (not ((not (((SUR_PONT_B <= 99) or (95 <= SORTI_A) or (ATTENTE_B <= VIDANGE)) and (SUR_PONT_A <= NB_ATTENTE_B) and (ROUTE_A <= ROUTE_A) and (NB_ATTENTE_B <= 47))) or (CONTROLEUR <= VIDANGE)))))
RWSTATS PRE:0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,10,0,0,0,0,
RWSTATS POST:0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,

Query after reduction: (not EF (((ROUTE_B < CONTROLEUR) or (((ROUTE_B < SORTI_A) or (ROUTE_B < 9)) and (((SORTI_A <= COMPTEUR) and (CHOIX <= SORTI_A)) or (SUR_PONT_A <= NB_ATTENTE_B) or (SORTI_A < VIDANGE) or (COMPTEUR < ATTENTE_B)) and ((ATTENTE_B <= NB_ATTENTE_A) or (ATTENTE_A <= VIDANGE)) and (CAPACITE <= ROUTE_A))) and ((NB_ATTENTE_B < SUR_PONT_A) or (CONTROLEUR <= VIDANGE))))
Query reduction finished after 0.002798 seconds.
Query size reduced from 228 to 49 nodes ( 78.5088 percent reduction).
Query index 0 was solved

Query is NOT satisfied
STATS:
discovered states: 685
explored states: 685
peak waiting states: 684
end waiting states: 684
biggest encoded state: 45 bytes
Command exited with non-zero status 1
@@@0.02,7328@@@

Parameters: -C -s DFS --colored-successor-generator even -q 0 ./model.pnml ./ReachabilityCardinality.xml -x 15

Search=DFS,Trace=DISABLED,PrintBindings=DISABLED,State_Space_Exploration=DISABLED,Colored_Structural_Reduction=ALL,Colored_Struct_Red_Timout=30,Structural_Reduction=AGGRESSIVE,Struct_Red_Timout=60,Stubborn_Reduction=ENABLED,Query_Simplication=DISABLED,Init_Potency=ENABLED,InitPotencyTimeout=10,Siphon_Trap=DISABLED,LPSolve_Timeout=10,ExplicitColored=ENABLED,ColoredSuccessorGenerator=EVEN

Colored structural reductions computed in 9.6e-05 seconds
Reduced from 15 to 15 places (0, 0%)
Reduced from 11 to 11 transitions (0, 0%)
Applications of rule AtomicPreAgglomeration: 0
Applications of rule DeadTransitions: 0
Applications of rule ParallelPlaces: 0
Applications of rule ParallelTransitions: 0
Applications of rule PreemptiveFiring: 0
Applications of rule RedundantPlaces: 0
Applications of rule Relevance: 0
Could not do colored reductions
Query index 0 was solved

Query is NOT satisfied
STATS:
discovered states: 622
explored states: 518
peak waiting states: 413
end waiting states: 377
biggest encoded state: 43 bytes
Command exited with non-zero status 1
@@@0.01,6132@@@

Search=BFS,Trace=DISABLED,PrintBindings=DISABLED,State_Space_Exploration=DISABLED,Colored_Structural_Reduction=DISABLED,Colored_Struct_Red_Timout=30,Structural_Reduction=AGGRESSIVE,Struct_Red_Timout=60,Stubborn_Reduction=ENABLED,Query_Simplication=DISABLED,Init_Potency=ENABLED,InitPotencyTimeout=10,Siphon_Trap=DISABLED,LPSolve_Timeout=10,ExplicitColored=ENABLED,ColoredSuccessorGenerator=EVEN
Query index 0 was solved

Query is NOT satisfied
STATS:
discovered states: 660784
explored states: 212609
peak waiting states: 25637
end waiting states: 25632
biggest encoded state: 47 bytes
Command exited with non-zero status 1
@@@4.19,54112@@@
parallel: Warning: This job was killed because it timed out:
parallel: Warning: eval /usr/bin/time -f "@@@%e,%M@@@" /home/mcc/BenchKit/bin/verifypn '-C -s BestFS --colored-successor-generator fixed -q 0' ./model.pnml ./ReachabilityCardinality.xml -x 15
Solution found by explicit exploration (step -0.5)

FORMULA BridgeAndVehicles-COL-V50P20N20-ReachabilityCardinality-2025-14 FALSE TECHNIQUES STRUCTURAL_REDUCTION CPN_EXPLICIT
Time left: 2726
All queries are solved in step -0.5
Time left: 2726
terminated-with-cleanup

BK_STOP 1748780936239

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

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="BridgeAndVehicles-COL-V50P20N20"
export BK_EXAMINATION="ReachabilityCardinality"
export BK_TOOL="tapaal"
export BK_RESULT_DIR="/tmp/BK_RESULTS/OUTPUTS"
export BK_TIME_CONFINEMENT="3600"
export BK_MEMORY_CONFINEMENT="16384"
export BK_BIN_PATH="/home/mcc/BenchKit/bin/"

# 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

# this is for BenchKit: explicit launching of the test
echo "====================================================================="
echo " Generated by BenchKit 2-5832"
echo " Executing tool tapaal"
echo " Input is BridgeAndVehicles-COL-V50P20N20, examination is ReachabilityCardinality"
echo " Time confinement is $BK_TIME_CONFINEMENT seconds"
echo " Memory confinement is 16384 MBytes"
echo " Number of cores is 4"
echo " Run identifier is r018-smll-174853767200238"
echo "====================================================================="
echo
echo "--------------------"
echo "preparation of the directory to be used:"

tar xzf /home/mcc/BenchKit/INPUTS/BridgeAndVehicles-COL-V50P20N20.tgz
mv BridgeAndVehicles-COL-V50P20N20 execution
cd execution
if [ "ReachabilityCardinality" = "ReachabilityDeadlock" ] || [ "ReachabilityCardinality" = "UpperBounds" ] || [ "ReachabilityCardinality" = "QuasiLiveness" ] || [ "ReachabilityCardinality" = "StableMarking" ] || [ "ReachabilityCardinality" = "Liveness" ] || [ "ReachabilityCardinality" = "OneSafe" ] || [ "ReachabilityCardinality" = "StateSpace" ]; then
rm -f GenericPropertiesVerdict.xml
fi
pwd
ls -lh

echo
echo "--------------------"
echo "content from stdout:"
echo
echo "=== Data for post analysis generated by BenchKit (invocation template)"
echo
if [ "ReachabilityCardinality" = "UpperBounds" ] ; then
echo "The expected result is a vector of positive values"
echo NUM_VECTOR
elif [ "ReachabilityCardinality" != "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 "ReachabilityCardinality.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 '' ReachabilityCardinality.xml | cut -d '>' -f 2 | cut -d '<' -f 1 | sort -u) ; do
echo "FORMULA_NAME $x"
done
elif [ "ReachabilityCardinality" = "ReachabilityDeadlock" ] || [ "ReachabilityCardinality" = "QuasiLiveness" ] || [ "ReachabilityCardinality" = "StableMarking" ] || [ "ReachabilityCardinality" = "Liveness" ] || [ "ReachabilityCardinality" = "OneSafe" ] ; then
echo "FORMULA_NAME ReachabilityCardinality"
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 ;