About the Execution of LTSMin+red for ShieldRVt-PT-020A
Execution Summary | |||||
Max Memory Used (MB) |
Time wait (ms) | CPU Usage (ms) | I/O Wait (ms) | Computed Result | Execution Status |
353.911 | 13752.00 | 25946.00 | 48.20 | FTFFTFFFTFFFFFFT | normal |
Execution Chart
We display below the execution chart for this examination (boot time has been removed).
Trace from the execution
Formatting '/mnt/tpsp/fkordon/mcc2023-input.r425-tajo-167905978000275.qcow2', fmt=qcow2 size=4294967296 backing_file='/mnt/tpsp/fkordon/mcc2023-input.qcow2' encryption=off cluster_size=65536 lazy_refcounts=off
Waiting for the VM to be ready (probing ssh)
.......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................
=====================================================================
Generated by BenchKit 2-5348
Executing tool ltsminxred
Input is ShieldRVt-PT-020A, examination is LTLCardinality
Time confinement is 3600 seconds
Memory confinement is 16384 MBytes
Number of cores is 4
Run identifier is r425-tajo-167905978000275
=====================================================================
--------------------
preparation of the directory to be used:
/home/mcc/execution
total 488K
-rw-r--r-- 1 mcc users 7.7K Feb 25 23:37 CTLCardinality.txt
-rw-r--r-- 1 mcc users 88K Feb 25 23:37 CTLCardinality.xml
-rw-r--r-- 1 mcc users 5.0K Feb 25 23:17 CTLFireability.txt
-rw-r--r-- 1 mcc users 45K Feb 25 23:17 CTLFireability.xml
-rw-r--r-- 1 mcc users 4.2K Jan 29 11:41 GenericPropertiesDefinition.xml
-rw-r--r-- 1 mcc users 6.6K Jan 29 11:41 GenericPropertiesVerdict.xml
-rw-r--r-- 1 mcc users 3.7K Feb 25 17:04 LTLCardinality.txt
-rw-r--r-- 1 mcc users 26K Feb 25 17:04 LTLCardinality.xml
-rw-r--r-- 1 mcc users 2.2K Feb 25 17:04 LTLFireability.txt
-rw-r--r-- 1 mcc users 19K Feb 25 17:04 LTLFireability.xml
-rw-r--r-- 1 mcc users 9.7K Feb 25 23:56 ReachabilityCardinality.txt
-rw-r--r-- 1 mcc users 103K Feb 25 23:56 ReachabilityCardinality.xml
-rw-r--r-- 1 mcc users 7.2K Feb 25 23:46 ReachabilityFireability.txt
-rw-r--r-- 1 mcc users 61K Feb 25 23:46 ReachabilityFireability.xml
-rw-r--r-- 1 mcc users 1.6K Feb 25 17:04 UpperBounds.txt
-rw-r--r-- 1 mcc users 3.6K Feb 25 17:04 UpperBounds.xml
-rw-r--r-- 1 mcc users 6 Mar 5 18:23 equiv_col
-rw-r--r-- 1 mcc users 5 Mar 5 18:23 instance
-rw-r--r-- 1 mcc users 6 Mar 5 18:23 iscolored
-rw-r--r-- 1 mcc users 54K Mar 5 18:23 model.pnml
--------------------
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 ShieldRVt-PT-020A-LTLCardinality-00
FORMULA_NAME ShieldRVt-PT-020A-LTLCardinality-01
FORMULA_NAME ShieldRVt-PT-020A-LTLCardinality-02
FORMULA_NAME ShieldRVt-PT-020A-LTLCardinality-03
FORMULA_NAME ShieldRVt-PT-020A-LTLCardinality-04
FORMULA_NAME ShieldRVt-PT-020A-LTLCardinality-05
FORMULA_NAME ShieldRVt-PT-020A-LTLCardinality-06
FORMULA_NAME ShieldRVt-PT-020A-LTLCardinality-07
FORMULA_NAME ShieldRVt-PT-020A-LTLCardinality-08
FORMULA_NAME ShieldRVt-PT-020A-LTLCardinality-09
FORMULA_NAME ShieldRVt-PT-020A-LTLCardinality-10
FORMULA_NAME ShieldRVt-PT-020A-LTLCardinality-11
FORMULA_NAME ShieldRVt-PT-020A-LTLCardinality-12
FORMULA_NAME ShieldRVt-PT-020A-LTLCardinality-13
FORMULA_NAME ShieldRVt-PT-020A-LTLCardinality-14
FORMULA_NAME ShieldRVt-PT-020A-LTLCardinality-15
=== Now, execution of the tool begins
BK_START 1679306306062
bash -c /home/mcc/BenchKit/BenchKit_head.sh 2> STDERR ; echo ; echo -n "BK_STOP " ; date -u +%s%3N
Invoking MCC driver with
BK_TOOL=ltsminxred
BK_EXAMINATION=LTLCardinality
BK_BIN_PATH=/home/mcc/BenchKit/bin/
BK_TIME_CONFINEMENT=3600
BK_INPUT=ShieldRVt-PT-020A
Applying reductions before tool ltsmin
Invoking reducer
Running Version 202303021504
[2023-03-20 09:58:27] [INFO ] Running its-tools with arguments : [-pnfolder, /home/mcc/execution, -examination, LTLCardinality, -timeout, 360, -rebuildPNML]
[2023-03-20 09:58:27] [INFO ] Parsing pnml file : /home/mcc/execution/model.pnml
[2023-03-20 09:58:27] [INFO ] Load time of PNML (sax parser for PT used): 47 ms
[2023-03-20 09:58:27] [INFO ] Transformed 163 places.
[2023-03-20 09:58:27] [INFO ] Transformed 163 transitions.
[2023-03-20 09:58:27] [INFO ] Found NUPN structural information;
[2023-03-20 09:58:27] [INFO ] Parsed PT model containing 163 places and 163 transitions and 686 arcs in 110 ms.
Parsed 16 properties from file /home/mcc/execution/LTLCardinality.xml in 8 ms.
Working with output stream class java.io.PrintStream
Initial state reduction rules removed 2 formulas.
Ensure Unique test removed 1 transitions
Reduce redundant transitions removed 1 transitions.
FORMULA ShieldRVt-PT-020A-LTLCardinality-01 TRUE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA ShieldRVt-PT-020A-LTLCardinality-03 FALSE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA ShieldRVt-PT-020A-LTLCardinality-05 FALSE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA ShieldRVt-PT-020A-LTLCardinality-06 FALSE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA ShieldRVt-PT-020A-LTLCardinality-13 FALSE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA ShieldRVt-PT-020A-LTLCardinality-15 TRUE TECHNIQUES TOPOLOGICAL INITIAL_STATE
Support contains 36 out of 163 places. Attempting structural reductions.
Starting structural reductions in LTL mode, iteration 0 : 163/163 places, 162/162 transitions.
Applied a total of 0 rules in 21 ms. Remains 163 /163 variables (removed 0) and now considering 162/162 (removed 0) transitions.
// Phase 1: matrix 162 rows 163 cols
[2023-03-20 09:58:28] [INFO ] Computed 81 place invariants in 14 ms
[2023-03-20 09:58:28] [INFO ] Implicit Places using invariants in 205 ms returned []
[2023-03-20 09:58:28] [INFO ] Invariant cache hit.
[2023-03-20 09:58:28] [INFO ] Implicit Places using invariants and state equation in 160 ms returned []
Implicit Place search using SMT with State Equation took 391 ms to find 0 implicit places.
[2023-03-20 09:58:28] [INFO ] Invariant cache hit.
[2023-03-20 09:58:28] [INFO ] Dead Transitions using invariants and state equation in 124 ms found 0 transitions.
Finished structural reductions in LTL mode , in 1 iterations and 538 ms. Remains : 163/163 places, 162/162 transitions.
Support contains 36 out of 163 places after structural reductions.
[2023-03-20 09:58:28] [INFO ] Flatten gal took : 37 ms
[2023-03-20 09:58:28] [INFO ] Flatten gal took : 18 ms
[2023-03-20 09:58:28] [INFO ] Input system was already deterministic with 162 transitions.
Incomplete random walk after 10000 steps, including 2 resets, run finished after 461 ms. (steps per millisecond=21 ) properties (out of 20) seen :14
Incomplete Best-First random walk after 10001 steps, including 2 resets, run finished after 52 ms. (steps per millisecond=192 ) properties (out of 6) seen :0
Incomplete Best-First random walk after 10000 steps, including 2 resets, run finished after 42 ms. (steps per millisecond=238 ) properties (out of 6) seen :0
Incomplete Best-First random walk after 10001 steps, including 2 resets, run finished after 35 ms. (steps per millisecond=285 ) properties (out of 6) seen :0
Incomplete Best-First random walk after 10001 steps, including 2 resets, run finished after 51 ms. (steps per millisecond=196 ) properties (out of 6) seen :0
Incomplete Best-First random walk after 10001 steps, including 2 resets, run finished after 50 ms. (steps per millisecond=200 ) properties (out of 6) seen :0
Incomplete Best-First random walk after 10001 steps, including 2 resets, run finished after 48 ms. (steps per millisecond=208 ) properties (out of 6) seen :0
Running SMT prover for 6 properties.
[2023-03-20 09:58:29] [INFO ] Invariant cache hit.
[2023-03-20 09:58:29] [INFO ] [Real]Absence check using 81 positive place invariants in 11 ms returned sat
[2023-03-20 09:58:29] [INFO ] After 208ms SMT Verify possible using all constraints in real domain returned unsat :0 sat :0 real:6
[2023-03-20 09:58:29] [INFO ] [Nat]Absence check using 81 positive place invariants in 13 ms returned sat
[2023-03-20 09:58:30] [INFO ] After 97ms SMT Verify possible using state equation in natural domain returned unsat :0 sat :6
[2023-03-20 09:58:30] [INFO ] After 180ms SMT Verify possible using trap constraints in natural domain returned unsat :0 sat :6
Attempting to minimize the solution found.
Minimization took 68 ms.
[2023-03-20 09:58:30] [INFO ] After 344ms SMT Verify possible using all constraints in natural domain returned unsat :0 sat :6
Parikh walk visited 0 properties in 52 ms.
Support contains 12 out of 163 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 163/163 places, 162/162 transitions.
Performed 1 Post agglomeration using F-continuation condition.Transition count delta: 1
Deduced a syphon composed of 1 places in 1 ms
Reduce places removed 1 places and 0 transitions.
Iterating global reduction 0 with 2 rules applied. Total rules applied 2 place count 162 transition count 161
Partial Free-agglomeration rule applied 14 times.
Drop transitions removed 14 transitions
Iterating global reduction 0 with 14 rules applied. Total rules applied 16 place count 162 transition count 161
Drop transitions removed 14 transitions
Redundant transition composition rules discarded 14 transitions
Iterating global reduction 0 with 14 rules applied. Total rules applied 30 place count 162 transition count 147
Applied a total of 30 rules in 49 ms. Remains 162 /163 variables (removed 1) and now considering 147/162 (removed 15) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 49 ms. Remains : 162/163 places, 147/162 transitions.
Incomplete random walk after 10000 steps, including 2 resets, run finished after 114 ms. (steps per millisecond=87 ) properties (out of 6) seen :3
Incomplete Best-First random walk after 10001 steps, including 2 resets, run finished after 22 ms. (steps per millisecond=454 ) properties (out of 3) seen :0
Incomplete Best-First random walk after 10001 steps, including 2 resets, run finished after 21 ms. (steps per millisecond=476 ) properties (out of 3) seen :0
Incomplete Best-First random walk after 10000 steps, including 2 resets, run finished after 20 ms. (steps per millisecond=500 ) properties (out of 3) seen :1
Running SMT prover for 2 properties.
// Phase 1: matrix 147 rows 162 cols
[2023-03-20 09:58:30] [INFO ] Computed 81 place invariants in 1 ms
[2023-03-20 09:58:30] [INFO ] [Real]Absence check using 81 positive place invariants in 10 ms returned sat
[2023-03-20 09:58:30] [INFO ] After 142ms SMT Verify possible using all constraints in real domain returned unsat :0 sat :0 real:2
[2023-03-20 09:58:30] [INFO ] [Nat]Absence check using 81 positive place invariants in 10 ms returned sat
[2023-03-20 09:58:30] [INFO ] After 50ms SMT Verify possible using state equation in natural domain returned unsat :0 sat :2
[2023-03-20 09:58:30] [INFO ] State equation strengthened by 2 read => feed constraints.
[2023-03-20 09:58:30] [INFO ] After 17ms SMT Verify possible using 2 Read/Feed constraints in natural domain returned unsat :0 sat :2
[2023-03-20 09:58:30] [INFO ] After 42ms SMT Verify possible using trap constraints in natural domain returned unsat :0 sat :2
Attempting to minimize the solution found.
Minimization took 23 ms.
[2023-03-20 09:58:30] [INFO ] After 169ms SMT Verify possible using all constraints in natural domain returned unsat :0 sat :2
Parikh walk visited 0 properties in 7 ms.
Support contains 4 out of 162 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 162/162 places, 147/147 transitions.
Partial Free-agglomeration rule applied 5 times.
Drop transitions removed 5 transitions
Iterating global reduction 0 with 5 rules applied. Total rules applied 5 place count 162 transition count 147
Drop transitions removed 5 transitions
Redundant transition composition rules discarded 5 transitions
Iterating global reduction 0 with 5 rules applied. Total rules applied 10 place count 162 transition count 142
Applied a total of 10 rules in 16 ms. Remains 162 /162 variables (removed 0) and now considering 142/147 (removed 5) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 16 ms. Remains : 162/162 places, 142/147 transitions.
Finished random walk after 1101 steps, including 0 resets, run visited all 2 properties in 8 ms. (steps per millisecond=137 )
Computed a total of 1 stabilizing places and 1 stable transitions
Running Spot : '/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.ltl.spot.binaries_1.0.0.202303021504/bin/ltl2tgba-linux64' '--check=stutter' '--hoaf=tv' '-f' '!(G((X(p0)&&(G(p2)||p1))))'
Support contains 6 out of 163 places. Attempting structural reductions.
Starting structural reductions in LTL mode, iteration 0 : 163/163 places, 162/162 transitions.
Applied a total of 0 rules in 1 ms. Remains 163 /163 variables (removed 0) and now considering 162/162 (removed 0) transitions.
// Phase 1: matrix 162 rows 163 cols
[2023-03-20 09:58:31] [INFO ] Computed 81 place invariants in 1 ms
[2023-03-20 09:58:31] [INFO ] Implicit Places using invariants in 87 ms returned []
[2023-03-20 09:58:31] [INFO ] Invariant cache hit.
[2023-03-20 09:58:31] [INFO ] Implicit Places using invariants and state equation in 145 ms returned []
Implicit Place search using SMT with State Equation took 235 ms to find 0 implicit places.
[2023-03-20 09:58:31] [INFO ] Invariant cache hit.
[2023-03-20 09:58:31] [INFO ] Dead Transitions using invariants and state equation in 96 ms found 0 transitions.
Finished structural reductions in LTL mode , in 1 iterations and 333 ms. Remains : 163/163 places, 162/162 transitions.
Stuttering acceptance computed with spot in 281 ms :[true, (OR (NOT p0) (AND (NOT p1) (NOT p2))), (OR (NOT p0) (NOT p2)), (OR (NOT p0) (AND (NOT p1) (NOT p2)))]
Running random walk in product with property : ShieldRVt-PT-020A-LTLCardinality-00 automaton TGBA Formula[mat=[[{ cond=true, acceptance={0} source=0 dest: 0}], [{ cond=(AND (NOT p1) (NOT p2)), acceptance={} source=1 dest: 0}, { cond=(AND (NOT p1) p2), acceptance={} source=1 dest: 2}, { cond=p1, acceptance={} source=1 dest: 3}], [{ cond=(OR (NOT p2) (NOT p0)), acceptance={} source=2 dest: 0}, { cond=(AND p2 p0), acceptance={} source=2 dest: 2}], [{ cond=(OR (AND (NOT p1) (NOT p2)) (NOT p0)), acceptance={} source=3 dest: 0}, { cond=(AND (NOT p1) p2 p0), acceptance={} source=3 dest: 2}, { cond=(AND p1 p0), acceptance={} source=3 dest: 3}]], initial=1, aps=[p1:(OR (EQ s50 0) (EQ s98 1)), p2:(OR (EQ s90 0) (EQ s26 1)), p0:(OR (AND (EQ s26 0) (EQ s90 1)) (AND (EQ s2 0) (EQ s68 1)))], nbAcceptance=1, properties=[trans-labels, explicit-labels, trans-acc, complete, deterministic, no-univ-branch, unambiguous, semi-deterministic, stutter-sensitive, terminal, very-weak, weak, inherently-weak], stateDesc=[null, null, null, null][false, false, false, false]]
Entered a terminal (fully accepting) state of product in 920 steps with 0 reset in 30 ms.
FORMULA ShieldRVt-PT-020A-LTLCardinality-00 FALSE TECHNIQUES STUTTER_TEST
Treatment of property ShieldRVt-PT-020A-LTLCardinality-00 finished in 710 ms.
Running Spot : '/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.ltl.spot.binaries_1.0.0.202303021504/bin/ltl2tgba-linux64' '--check=stutter' '--hoaf=tv' '-f' '!(X(G(((X(p2)||p1)&&p0))))'
Support contains 5 out of 163 places. Attempting structural reductions.
Starting structural reductions in LTL mode, iteration 0 : 163/163 places, 162/162 transitions.
Applied a total of 0 rules in 2 ms. Remains 163 /163 variables (removed 0) and now considering 162/162 (removed 0) transitions.
[2023-03-20 09:58:31] [INFO ] Invariant cache hit.
[2023-03-20 09:58:31] [INFO ] Implicit Places using invariants in 126 ms returned []
[2023-03-20 09:58:31] [INFO ] Invariant cache hit.
[2023-03-20 09:58:32] [INFO ] Implicit Places using invariants and state equation in 153 ms returned []
Implicit Place search using SMT with State Equation took 282 ms to find 0 implicit places.
[2023-03-20 09:58:32] [INFO ] Invariant cache hit.
[2023-03-20 09:58:32] [INFO ] Dead Transitions using invariants and state equation in 81 ms found 0 transitions.
Finished structural reductions in LTL mode , in 1 iterations and 366 ms. Remains : 163/163 places, 162/162 transitions.
Stuttering acceptance computed with spot in 166 ms :[true, (OR (NOT p0) (AND (NOT p1) (NOT p2))), (OR (NOT p0) (AND (NOT p1) (NOT p2))), (OR (NOT p0) (NOT p2))]
Running random walk in product with property : ShieldRVt-PT-020A-LTLCardinality-02 automaton TGBA Formula[mat=[[{ cond=true, acceptance={0} source=0 dest: 0}], [{ cond=true, acceptance={} source=1 dest: 2}], [{ cond=(NOT p0), acceptance={} source=2 dest: 0}, { cond=(AND p0 p1), acceptance={} source=2 dest: 2}, { cond=(AND p0 (NOT p1)), acceptance={} source=2 dest: 3}], [{ cond=(OR (NOT p0) (NOT p2)), acceptance={} source=3 dest: 0}, { cond=(AND p0 p1 p2), acceptance={} source=3 dest: 2}, { cond=(AND p0 (NOT p1) p2), acceptance={} source=3 dest: 3}]], initial=1, aps=[p0:(AND (NEQ s21 0) (NEQ s106 1)), p1:(OR (EQ s99 0) (EQ s39 1)), p2:(EQ s42 0)], nbAcceptance=1, properties=[trans-labels, explicit-labels, trans-acc, complete, deterministic, no-univ-branch, unambiguous, semi-deterministic, stutter-sensitive, terminal, weak, inherently-weak], stateDesc=[null, null, null, null][false, false, false, false]]
Entered a terminal (fully accepting) state of product in 1 steps with 0 reset in 0 ms.
FORMULA ShieldRVt-PT-020A-LTLCardinality-02 FALSE TECHNIQUES STUTTER_TEST
Treatment of property ShieldRVt-PT-020A-LTLCardinality-02 finished in 549 ms.
Running Spot : '/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.ltl.spot.binaries_1.0.0.202303021504/bin/ltl2tgba-linux64' '--check=stutter' '--hoaf=tv' '-f' '!(X(X(F(p0))))'
Support contains 2 out of 163 places. Attempting structural reductions.
Starting structural reductions in LTL mode, iteration 0 : 163/163 places, 162/162 transitions.
Applied a total of 0 rules in 2 ms. Remains 163 /163 variables (removed 0) and now considering 162/162 (removed 0) transitions.
[2023-03-20 09:58:32] [INFO ] Invariant cache hit.
[2023-03-20 09:58:32] [INFO ] Implicit Places using invariants in 95 ms returned []
[2023-03-20 09:58:32] [INFO ] Invariant cache hit.
[2023-03-20 09:58:32] [INFO ] Implicit Places using invariants and state equation in 150 ms returned []
Implicit Place search using SMT with State Equation took 249 ms to find 0 implicit places.
[2023-03-20 09:58:32] [INFO ] Invariant cache hit.
[2023-03-20 09:58:32] [INFO ] Dead Transitions using invariants and state equation in 130 ms found 0 transitions.
Finished structural reductions in LTL mode , in 1 iterations and 383 ms. Remains : 163/163 places, 162/162 transitions.
Stuttering acceptance computed with spot in 98 ms :[(NOT p0), (NOT p0), (NOT p0)]
Running random walk in product with property : ShieldRVt-PT-020A-LTLCardinality-04 automaton TGBA Formula[mat=[[{ cond=(NOT p0), acceptance={0} source=0 dest: 0}], [{ cond=true, acceptance={} source=1 dest: 0}], [{ cond=true, acceptance={} source=2 dest: 1}]], initial=2, aps=[p0:(OR (EQ s77 0) (EQ s48 1))], nbAcceptance=1, properties=[trans-labels, explicit-labels, trans-acc, deterministic, no-univ-branch, unambiguous, semi-deterministic, stutter-sensitive, very-weak, weak, inherently-weak], stateDesc=[null, null, null][false, false, false]]
Product exploration explored 100000 steps with 33333 reset in 594 ms.
Product exploration explored 100000 steps with 33333 reset in 417 ms.
Computed a total of 1 stabilizing places and 1 stable transitions
Computed a total of 1 stabilizing places and 1 stable transitions
Knowledge obtained : [p0, (X (X p0))]
False Knowledge obtained : []
Property proved to be true thanks to knowledge :(X (X p0))
Knowledge based reduction with 2 factoid took 86 ms. Reduced automaton from 3 states, 3 edges and 1 AP (stutter sensitive) to 1 states, 0 edges and 0 AP (stutter insensitive).
FORMULA ShieldRVt-PT-020A-LTLCardinality-04 TRUE TECHNIQUES KNOWLEDGE
Treatment of property ShieldRVt-PT-020A-LTLCardinality-04 finished in 1593 ms.
Running Spot : '/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.ltl.spot.binaries_1.0.0.202303021504/bin/ltl2tgba-linux64' '--check=stutter' '--hoaf=tv' '-f' '!(X(X(G((X(p1)||p0)))))'
Support contains 4 out of 163 places. Attempting structural reductions.
Starting structural reductions in LTL mode, iteration 0 : 163/163 places, 162/162 transitions.
Applied a total of 0 rules in 2 ms. Remains 163 /163 variables (removed 0) and now considering 162/162 (removed 0) transitions.
[2023-03-20 09:58:33] [INFO ] Invariant cache hit.
[2023-03-20 09:58:33] [INFO ] Implicit Places using invariants in 89 ms returned []
[2023-03-20 09:58:33] [INFO ] Invariant cache hit.
[2023-03-20 09:58:34] [INFO ] Implicit Places using invariants and state equation in 154 ms returned []
Implicit Place search using SMT with State Equation took 247 ms to find 0 implicit places.
[2023-03-20 09:58:34] [INFO ] Invariant cache hit.
[2023-03-20 09:58:34] [INFO ] Dead Transitions using invariants and state equation in 113 ms found 0 transitions.
Finished structural reductions in LTL mode , in 1 iterations and 363 ms. Remains : 163/163 places, 162/162 transitions.
Stuttering acceptance computed with spot in 161 ms :[true, (NOT p1), (AND (NOT p0) (NOT p1)), (AND (NOT p1) (NOT p0)), (AND (NOT p1) (NOT p0))]
Running random walk in product with property : ShieldRVt-PT-020A-LTLCardinality-07 automaton TGBA Formula[mat=[[{ cond=true, acceptance={0} source=0 dest: 0}], [{ cond=(NOT p1), acceptance={} source=1 dest: 0}, { cond=(AND (NOT p0) p1), acceptance={} source=1 dest: 1}, { cond=(AND p0 p1), acceptance={} source=1 dest: 2}], [{ cond=(NOT p0), acceptance={} source=2 dest: 1}, { cond=p0, acceptance={} source=2 dest: 2}], [{ cond=true, acceptance={} source=3 dest: 2}], [{ cond=true, acceptance={} source=4 dest: 3}]], initial=4, aps=[p1:(AND (EQ s97 0) (EQ s0 1)), p0:(OR (EQ s1 0) (EQ s110 1))], nbAcceptance=1, properties=[trans-labels, explicit-labels, trans-acc, complete, deterministic, no-univ-branch, unambiguous, semi-deterministic, stutter-sensitive, terminal, weak, inherently-weak], stateDesc=[null, null, null, null, null][false, false, false, false, false]]
Entered a terminal (fully accepting) state of product in 251 steps with 0 reset in 1 ms.
FORMULA ShieldRVt-PT-020A-LTLCardinality-07 FALSE TECHNIQUES STUTTER_TEST
Treatment of property ShieldRVt-PT-020A-LTLCardinality-07 finished in 541 ms.
Running Spot : '/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.ltl.spot.binaries_1.0.0.202303021504/bin/ltl2tgba-linux64' '--check=stutter' '--hoaf=tv' '-f' '!(((G(!p0)||X(!p1)) U p2))'
Support contains 5 out of 163 places. Attempting structural reductions.
Starting structural reductions in LTL mode, iteration 0 : 163/163 places, 162/162 transitions.
Applied a total of 0 rules in 1 ms. Remains 163 /163 variables (removed 0) and now considering 162/162 (removed 0) transitions.
[2023-03-20 09:58:34] [INFO ] Invariant cache hit.
[2023-03-20 09:58:34] [INFO ] Implicit Places using invariants in 77 ms returned []
[2023-03-20 09:58:34] [INFO ] Invariant cache hit.
[2023-03-20 09:58:34] [INFO ] Implicit Places using invariants and state equation in 159 ms returned []
Implicit Place search using SMT with State Equation took 238 ms to find 0 implicit places.
[2023-03-20 09:58:34] [INFO ] Invariant cache hit.
[2023-03-20 09:58:34] [INFO ] Dead Transitions using invariants and state equation in 98 ms found 0 transitions.
Finished structural reductions in LTL mode , in 1 iterations and 340 ms. Remains : 163/163 places, 162/162 transitions.
Stuttering acceptance computed with spot in 161 ms :[(NOT p2), p1, (AND p0 p1), true, p0]
Running random walk in product with property : ShieldRVt-PT-020A-LTLCardinality-08 automaton TGBA Formula[mat=[[{ cond=(NOT p2), acceptance={0} source=0 dest: 0}, { cond=(AND (NOT p2) p0), acceptance={0} source=0 dest: 1}, { cond=(AND (NOT p2) (NOT p0)), acceptance={0} source=0 dest: 2}], [{ cond=p1, acceptance={} source=1 dest: 3}], [{ cond=(AND p0 p1), acceptance={} source=2 dest: 3}, { cond=(AND (NOT p0) p1), acceptance={} source=2 dest: 4}], [{ cond=true, acceptance={0} source=3 dest: 3}], [{ cond=p0, acceptance={} source=4 dest: 3}, { cond=(NOT p0), acceptance={} source=4 dest: 4}]], initial=0, aps=[p2:(EQ s52 1), p0:(AND (OR (EQ s132 0) (EQ s137 1)) (OR (EQ s45 0) (EQ s119 1))), p1:(AND (OR (EQ s132 0) (EQ s137 1)) (EQ s52 1))], nbAcceptance=1, properties=[trans-labels, explicit-labels, trans-acc, no-univ-branch, stutter-sensitive, very-weak, weak, inherently-weak], stateDesc=[null, null, null, null, null][false, false, false, false, false]]
Product exploration explored 100000 steps with 50000 reset in 531 ms.
Product exploration explored 100000 steps with 50000 reset in 508 ms.
Computed a total of 1 stabilizing places and 1 stable transitions
Computed a total of 1 stabilizing places and 1 stable transitions
Knowledge obtained : [(AND (NOT p2) p0 (NOT p1)), (X p2), (X (NOT (AND (NOT p2) (NOT p0)))), (X (NOT (AND (NOT p0) p1))), (X (NOT (AND (NOT p2) p0))), (X (NOT p1)), (X (NOT (AND p0 p1))), true, (X (X p2)), (X (X (NOT (AND (NOT p2) (NOT p0))))), (X (X (NOT (AND (NOT p0) p1)))), (X (X (NOT (AND (NOT p2) p0)))), (X (X (NOT p0))), (X (X (NOT p1))), (X (X (NOT (AND p0 p1))))]
False Knowledge obtained : []
Property proved to be true thanks to knowledge :(X (NOT p1))
Knowledge based reduction with 15 factoid took 344 ms. Reduced automaton from 5 states, 9 edges and 3 AP (stutter sensitive) to 1 states, 0 edges and 0 AP (stutter insensitive).
FORMULA ShieldRVt-PT-020A-LTLCardinality-08 TRUE TECHNIQUES KNOWLEDGE
Treatment of property ShieldRVt-PT-020A-LTLCardinality-08 finished in 1907 ms.
Running Spot : '/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.ltl.spot.binaries_1.0.0.202303021504/bin/ltl2tgba-linux64' '--check=stutter' '--hoaf=tv' '-f' '!(X((X(F(p1))&&p0)))'
Support contains 4 out of 163 places. Attempting structural reductions.
Starting structural reductions in LTL mode, iteration 0 : 163/163 places, 162/162 transitions.
Applied a total of 0 rules in 3 ms. Remains 163 /163 variables (removed 0) and now considering 162/162 (removed 0) transitions.
[2023-03-20 09:58:36] [INFO ] Invariant cache hit.
[2023-03-20 09:58:36] [INFO ] Implicit Places using invariants in 98 ms returned []
[2023-03-20 09:58:36] [INFO ] Invariant cache hit.
[2023-03-20 09:58:36] [INFO ] Implicit Places using invariants and state equation in 143 ms returned []
Implicit Place search using SMT with State Equation took 243 ms to find 0 implicit places.
[2023-03-20 09:58:36] [INFO ] Invariant cache hit.
[2023-03-20 09:58:36] [INFO ] Dead Transitions using invariants and state equation in 114 ms found 0 transitions.
Finished structural reductions in LTL mode , in 1 iterations and 361 ms. Remains : 163/163 places, 162/162 transitions.
Stuttering acceptance computed with spot in 148 ms :[(NOT p1), (OR (NOT p0) (NOT p1)), (OR (NOT p0) (NOT p1)), true]
Running random walk in product with property : ShieldRVt-PT-020A-LTLCardinality-09 automaton TGBA Formula[mat=[[{ cond=(NOT p1), acceptance={0} source=0 dest: 0}], [{ cond=p0, acceptance={} source=1 dest: 0}, { cond=(NOT p0), acceptance={} source=1 dest: 3}], [{ cond=true, acceptance={} source=2 dest: 1}], [{ cond=true, acceptance={0} source=3 dest: 3}]], initial=2, aps=[p1:(OR (EQ s158 0) (EQ s113 1)), p0:(AND (EQ s54 0) (EQ s150 1))], nbAcceptance=1, properties=[trans-labels, explicit-labels, trans-acc, deterministic, no-univ-branch, unambiguous, semi-deterministic, stutter-sensitive, very-weak, weak, inherently-weak], stateDesc=[null, null, null, null][false, false, false, false]]
Entered a terminal (fully accepting) state of product in 1 steps with 0 reset in 0 ms.
FORMULA ShieldRVt-PT-020A-LTLCardinality-09 FALSE TECHNIQUES STUTTER_TEST
Treatment of property ShieldRVt-PT-020A-LTLCardinality-09 finished in 526 ms.
Running Spot : '/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.ltl.spot.binaries_1.0.0.202303021504/bin/ltl2tgba-linux64' '--check=stutter' '--hoaf=tv' '-f' '!(X(F(p0)))'
Support contains 2 out of 163 places. Attempting structural reductions.
Starting structural reductions in LTL mode, iteration 0 : 163/163 places, 162/162 transitions.
Applied a total of 0 rules in 2 ms. Remains 163 /163 variables (removed 0) and now considering 162/162 (removed 0) transitions.
[2023-03-20 09:58:36] [INFO ] Invariant cache hit.
[2023-03-20 09:58:36] [INFO ] Implicit Places using invariants in 93 ms returned []
[2023-03-20 09:58:36] [INFO ] Invariant cache hit.
[2023-03-20 09:58:37] [INFO ] Implicit Places using invariants and state equation in 149 ms returned []
Implicit Place search using SMT with State Equation took 247 ms to find 0 implicit places.
[2023-03-20 09:58:37] [INFO ] Invariant cache hit.
[2023-03-20 09:58:37] [INFO ] Dead Transitions using invariants and state equation in 114 ms found 0 transitions.
Finished structural reductions in LTL mode , in 1 iterations and 364 ms. Remains : 163/163 places, 162/162 transitions.
Stuttering acceptance computed with spot in 80 ms :[(NOT p0), (NOT p0)]
Running random walk in product with property : ShieldRVt-PT-020A-LTLCardinality-10 automaton TGBA Formula[mat=[[{ cond=true, acceptance={} source=0 dest: 1}], [{ cond=(NOT p0), acceptance={0} source=1 dest: 1}]], initial=0, aps=[p0:(AND (EQ s140 0) (EQ s44 1))], nbAcceptance=1, properties=[trans-labels, explicit-labels, trans-acc, deterministic, no-univ-branch, unambiguous, semi-deterministic, stutter-sensitive, very-weak, weak, inherently-weak], stateDesc=[null, null][false, false]]
Product exploration explored 100000 steps with 1022 reset in 312 ms.
Stack based approach found an accepted trace after 5 steps with 0 reset with depth 6 and stack size 6 in 0 ms.
FORMULA ShieldRVt-PT-020A-LTLCardinality-10 FALSE TECHNIQUES STACK_TEST
Treatment of property ShieldRVt-PT-020A-LTLCardinality-10 finished in 772 ms.
Running Spot : '/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.ltl.spot.binaries_1.0.0.202303021504/bin/ltl2tgba-linux64' '--check=stutter' '--hoaf=tv' '-f' '!(X(F(p0)))'
Support contains 2 out of 163 places. Attempting structural reductions.
Starting structural reductions in LTL mode, iteration 0 : 163/163 places, 162/162 transitions.
Applied a total of 0 rules in 2 ms. Remains 163 /163 variables (removed 0) and now considering 162/162 (removed 0) transitions.
[2023-03-20 09:58:37] [INFO ] Invariant cache hit.
[2023-03-20 09:58:37] [INFO ] Implicit Places using invariants in 90 ms returned []
[2023-03-20 09:58:37] [INFO ] Invariant cache hit.
[2023-03-20 09:58:37] [INFO ] Implicit Places using invariants and state equation in 151 ms returned []
Implicit Place search using SMT with State Equation took 245 ms to find 0 implicit places.
[2023-03-20 09:58:37] [INFO ] Invariant cache hit.
[2023-03-20 09:58:37] [INFO ] Dead Transitions using invariants and state equation in 111 ms found 0 transitions.
Finished structural reductions in LTL mode , in 1 iterations and 360 ms. Remains : 163/163 places, 162/162 transitions.
Stuttering acceptance computed with spot in 76 ms :[(NOT p0), (NOT p0)]
Running random walk in product with property : ShieldRVt-PT-020A-LTLCardinality-11 automaton TGBA Formula[mat=[[{ cond=true, acceptance={} source=0 dest: 1}], [{ cond=(NOT p0), acceptance={0} source=1 dest: 1}]], initial=0, aps=[p0:(AND (NEQ s78 0) (NEQ s100 1))], nbAcceptance=1, properties=[trans-labels, explicit-labels, trans-acc, deterministic, no-univ-branch, unambiguous, semi-deterministic, stutter-sensitive, very-weak, weak, inherently-weak], stateDesc=[null, null][false, false]]
Product exploration explored 100000 steps with 63 reset in 287 ms.
Stack based approach found an accepted trace after 4 steps with 0 reset with depth 5 and stack size 5 in 0 ms.
FORMULA ShieldRVt-PT-020A-LTLCardinality-11 FALSE TECHNIQUES STACK_TEST
Treatment of property ShieldRVt-PT-020A-LTLCardinality-11 finished in 739 ms.
Running Spot : '/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.ltl.spot.binaries_1.0.0.202303021504/bin/ltl2tgba-linux64' '--check=stutter' '--hoaf=tv' '-f' '!(G((F(p0)&&F(G(p1)))))'
Support contains 4 out of 163 places. Attempting structural reductions.
Starting structural reductions in SI_LTL mode, iteration 0 : 163/163 places, 162/162 transitions.
Performed 1 Post agglomeration using F-continuation condition.Transition count delta: 1
Deduced a syphon composed of 1 places in 0 ms
Reduce places removed 1 places and 0 transitions.
Iterating global reduction 0 with 2 rules applied. Total rules applied 2 place count 162 transition count 161
Applied a total of 2 rules in 11 ms. Remains 162 /163 variables (removed 1) and now considering 161/162 (removed 1) transitions.
// Phase 1: matrix 161 rows 162 cols
[2023-03-20 09:58:38] [INFO ] Computed 81 place invariants in 3 ms
[2023-03-20 09:58:38] [INFO ] Implicit Places using invariants in 139 ms returned [155]
Discarding 1 places :
Implicit Place search using SMT only with invariants took 141 ms to find 1 implicit places.
Starting structural reductions in SI_LTL mode, iteration 1 : 161/163 places, 161/162 transitions.
Applied a total of 0 rules in 7 ms. Remains 161 /161 variables (removed 0) and now considering 161/161 (removed 0) transitions.
Finished structural reductions in SI_LTL mode , in 2 iterations and 160 ms. Remains : 161/163 places, 161/162 transitions.
Stuttering acceptance computed with spot in 134 ms :[(OR (NOT p0) (NOT p1)), (NOT p0), (NOT p1)]
Running random walk in product with property : ShieldRVt-PT-020A-LTLCardinality-12 automaton TGBA Formula[mat=[[{ cond=true, acceptance={} source=0 dest: 0}, { cond=(NOT p0), acceptance={} source=0 dest: 1}, { cond=(NOT p1), acceptance={} source=0 dest: 2}], [{ cond=(NOT p0), acceptance={0} source=1 dest: 1}], [{ cond=p1, acceptance={} source=2 dest: 2}, { cond=(NOT p1), acceptance={0} source=2 dest: 2}]], initial=0, aps=[p0:(AND (OR (EQ s125 0) (EQ s70 1)) (OR (EQ s53 0) (EQ s159 1))), p1:(OR (EQ s53 0) (EQ s159 1))], nbAcceptance=1, properties=[trans-labels, explicit-labels, trans-acc, no-univ-branch, stutter-invariant], stateDesc=[null, null, null][true, true, true]]
Product exploration explored 100000 steps with 0 reset in 285 ms.
Stack based approach found an accepted trace after 22331 steps with 0 reset with depth 22332 and stack size 6505 in 112 ms.
FORMULA ShieldRVt-PT-020A-LTLCardinality-12 FALSE TECHNIQUES STACK_TEST
Treatment of property ShieldRVt-PT-020A-LTLCardinality-12 finished in 719 ms.
Running Spot : '/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.ltl.spot.binaries_1.0.0.202303021504/bin/ltl2tgba-linux64' '--check=stutter' '--hoaf=tv' '-f' '!(X(G((p0&&X(X(G(p1)))))))'
Support contains 2 out of 163 places. Attempting structural reductions.
Starting structural reductions in LTL mode, iteration 0 : 163/163 places, 162/162 transitions.
Applied a total of 0 rules in 1 ms. Remains 163 /163 variables (removed 0) and now considering 162/162 (removed 0) transitions.
// Phase 1: matrix 162 rows 163 cols
[2023-03-20 09:58:39] [INFO ] Computed 81 place invariants in 6 ms
[2023-03-20 09:58:39] [INFO ] Implicit Places using invariants in 81 ms returned []
[2023-03-20 09:58:39] [INFO ] Invariant cache hit.
[2023-03-20 09:58:39] [INFO ] Implicit Places using invariants and state equation in 157 ms returned []
Implicit Place search using SMT with State Equation took 241 ms to find 0 implicit places.
[2023-03-20 09:58:39] [INFO ] Invariant cache hit.
[2023-03-20 09:58:39] [INFO ] Dead Transitions using invariants and state equation in 104 ms found 0 transitions.
Finished structural reductions in LTL mode , in 1 iterations and 348 ms. Remains : 163/163 places, 162/162 transitions.
Stuttering acceptance computed with spot in 181 ms :[true, (OR (NOT p1) (NOT p0)), (OR (NOT p1) (NOT p0)), (OR (NOT p0) (NOT p1)), (OR (NOT p0) (NOT p1))]
Running random walk in product with property : ShieldRVt-PT-020A-LTLCardinality-14 automaton TGBA Formula[mat=[[{ cond=true, acceptance={0} source=0 dest: 0}], [{ cond=true, acceptance={} source=1 dest: 4}], [{ cond=(OR (NOT p0) (NOT p1)), acceptance={} source=2 dest: 0}, { cond=(AND p0 p1), acceptance={} source=2 dest: 2}], [{ cond=(NOT p0), acceptance={} source=3 dest: 0}, { cond=p0, acceptance={} source=3 dest: 2}], [{ cond=(NOT p0), acceptance={} source=4 dest: 0}, { cond=p0, acceptance={} source=4 dest: 3}]], initial=1, aps=[p0:(EQ s74 1), p1:(EQ s63 1)], nbAcceptance=1, properties=[trans-labels, explicit-labels, trans-acc, complete, deterministic, no-univ-branch, unambiguous, semi-deterministic, stutter-sensitive, terminal, very-weak, weak, inherently-weak], stateDesc=[null, null, null, null, null][false, false, false, false, false]]
Entered a terminal (fully accepting) state of product in 3 steps with 0 reset in 0 ms.
FORMULA ShieldRVt-PT-020A-LTLCardinality-14 FALSE TECHNIQUES STUTTER_TEST
Treatment of property ShieldRVt-PT-020A-LTLCardinality-14 finished in 552 ms.
All properties solved by simple procedures.
Total runtime 11849 ms.
ITS solved all properties within timeout
BK_STOP 1679306319814
--------------------
content from stderr:
+ ulimit -s 65536
+ [[ -z '' ]]
+ export LTSMIN_MEM_SIZE=8589934592
+ LTSMIN_MEM_SIZE=8589934592
+ export PYTHONPATH=/home/mcc/BenchKit/itstools/pylibs
+ PYTHONPATH=/home/mcc/BenchKit/itstools/pylibs
+ export LD_LIBRARY_PATH=/home/mcc/BenchKit/itstools/pylibs:
+ LD_LIBRARY_PATH=/home/mcc/BenchKit/itstools/pylibs:
++ sed s/.jar//
++ perl -pe 's/.*\.//g'
++ ls /home/mcc/BenchKit/bin//../reducer/bin//../../itstools//itstools/plugins/fr.lip6.move.gal.application.pnmcc_1.0.0.202303021504.jar
+ VERSION=202303021504
+ echo 'Running Version 202303021504'
+ /home/mcc/BenchKit/bin//../reducer/bin//../../itstools//itstools/its-tools -pnfolder /home/mcc/execution -examination LTLCardinality -timeout 360 -rebuildPNML
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="ShieldRVt-PT-020A"
export BK_EXAMINATION="LTLCardinality"
export BK_TOOL="ltsminxred"
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 2-5348"
echo " Executing tool ltsminxred"
echo " Input is ShieldRVt-PT-020A, examination is LTLCardinality"
echo " Time confinement is $BK_TIME_CONFINEMENT seconds"
echo " Memory confinement is 16384 MBytes"
echo " Number of cores is 4"
echo " Run identifier is r425-tajo-167905978000275"
echo "====================================================================="
echo
echo "--------------------"
echo "preparation of the directory to be used:"
tar xzf /home/mcc/BenchKit/INPUTS/ShieldRVt-PT-020A.tgz
mv ShieldRVt-PT-020A execution
cd execution
if [ "LTLCardinality" = "ReachabilityDeadlock" ] || [ "LTLCardinality" = "UpperBounds" ] || [ "LTLCardinality" = "QuasiLiveness" ] || [ "LTLCardinality" = "StableMarking" ] || [ "LTLCardinality" = "Liveness" ] || [ "LTLCardinality" = "OneSafe" ] || [ "LTLCardinality" = "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 [ "LTLCardinality" = "UpperBounds" ] ; then
echo "The expected result is a vector of positive values"
echo NUM_VECTOR
elif [ "LTLCardinality" != "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 "LTLCardinality.txt" ] ; then
echo "here is the order used to build the result vector(from text file)"
for x in $(grep Property LTLCardinality.txt | cut -d ' ' -f 2 | sort -u) ; do
echo "FORMULA_NAME $x"
done
elif [ -f "LTLCardinality.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 '
echo "FORMULA_NAME $x"
done
elif [ "LTLCardinality" = "ReachabilityDeadlock" ] || [ "LTLCardinality" = "QuasiLiveness" ] || [ "LTLCardinality" = "StableMarking" ] || [ "LTLCardinality" = "Liveness" ] || [ "LTLCardinality" = "OneSafe" ] ; then
echo "FORMULA_NAME LTLCardinality"
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 ;