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 2-2979
Executing tool lola
Input is ERK-PT-100000, examination is CTLFireability
Time confinement is 3600 seconds
Memory confinement is 16384 MBytes
Number of cores is 4
Run identifier is r038kn-smll-146351480500130
=====================================================================

--------------------
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 ERK-PT-100000-CTLFireability-0
FORMULA_NAME ERK-PT-100000-CTLFireability-1
FORMULA_NAME ERK-PT-100000-CTLFireability-10
FORMULA_NAME ERK-PT-100000-CTLFireability-11
FORMULA_NAME ERK-PT-100000-CTLFireability-12
FORMULA_NAME ERK-PT-100000-CTLFireability-13
FORMULA_NAME ERK-PT-100000-CTLFireability-14
FORMULA_NAME ERK-PT-100000-CTLFireability-15
FORMULA_NAME ERK-PT-100000-CTLFireability-2
FORMULA_NAME ERK-PT-100000-CTLFireability-3
FORMULA_NAME ERK-PT-100000-CTLFireability-4
FORMULA_NAME ERK-PT-100000-CTLFireability-5
FORMULA_NAME ERK-PT-100000-CTLFireability-6
FORMULA_NAME ERK-PT-100000-CTLFireability-7
FORMULA_NAME ERK-PT-100000-CTLFireability-8
FORMULA_NAME ERK-PT-100000-CTLFireability-9

=== Now, execution of the tool begins

BK_START 1463526459985

bkconf 3600
make: Nothing to be done for 'prepare'.
in benchkit_head lolaszeit 3539
CTLFireability @ ERK-PT-100000
FORMULA ERK-PT-100000-CTLFireability-0 CANNOT_COMPUTE
FORMULA ERK-PT-100000-CTLFireability-1 CANNOT_COMPUTE
FORMULA ERK-PT-100000-CTLFireability-2 CANNOT_COMPUTE
FORMULA ERK-PT-100000-CTLFireability-3 CANNOT_COMPUTE
FORMULA ERK-PT-100000-CTLFireability-4 FALSE TECHNIQUES PARALLEL_PROCESSING EXPLICIT SAT_SMT STATE_COMPRESSION STUBBORN_SETS TOPOLOGICAL
FORMULA ERK-PT-100000-CTLFireability-5 CANNOT_COMPUTE
FORMULA ERK-PT-100000-CTLFireability-6 TRUE TECHNIQUES PARALLEL_PROCESSING EXPLICIT SAT_SMT STATE_COMPRESSION STUBBORN_SETS TOPOLOGICAL
FORMULA ERK-PT-100000-CTLFireability-7 FALSE TECHNIQUES PARALLEL_PROCESSING EXPLICIT SAT_SMT STATE_COMPRESSION STUBBORN_SETS TOPOLOGICAL
FORMULA ERK-PT-100000-CTLFireability-8 CANNOT_COMPUTE
FORMULA ERK-PT-100000-CTLFireability-9 CANNOT_COMPUTE
FORMULA ERK-PT-100000-CTLFireability-10 TRUE TECHNIQUES PARALLEL_PROCESSING EXPLICIT SAT_SMT STATE_COMPRESSION STUBBORN_SETS TOPOLOGICAL
FORMULA ERK-PT-100000-CTLFireability-11 CANNOT_COMPUTE
FORMULA ERK-PT-100000-CTLFireability-12 FALSE TECHNIQUES PARALLEL_PROCESSING EXPLICIT SAT_SMT STATE_COMPRESSION STUBBORN_SETS TOPOLOGICAL
FORMULA ERK-PT-100000-CTLFireability-13 CANNOT_COMPUTE
FORMULA ERK-PT-100000-CTLFireability-14 FALSE TECHNIQUES PARALLEL_PROCESSING EXPLICIT SAT_SMT STATE_COMPRESSION STUBBORN_SETS TOPOLOGICAL
FORMULA ERK-PT-100000-CTLFireability-15 FALSE TECHNIQUES PARALLEL_PROCESSING EXPLICIT SAT_SMT STATE_COMPRESSION STUBBORN_SETS TOPOLOGICAL
lola: LoLA will run for 3539 seconds at most (--timelimit)
lola: NET
lola: reading net from model.pnml.lola
lola: finished parsing
lola: closed net file model.pnml.lola
lola: 22/65536 symbol table entries, 0 collisions
lola: preprocessing...
lola: finding significant places
lola: 11 places, 11 transitions, 6 significant places
lola: computing forward-conflicting sets
lola: computing back-conflicting sets
lola: 10 transition conflict sets
lola: TASK
lola: reading formula from ERK-PT-100000-CTLFireability.task
lola: read: !(EF ((((FIREABLE(r9) AND FIREABLE(r7)) AND !(FIREABLE(r10))) AND AG (FIREABLE(r3))))) : AG (EF (EF (FIREABLE(r11)))) : EF (AG (FIREABLE(r6))) : AG (AG (EF (FIREABLE(r8)))) : ((AG (AG (FIREABLE(r1))) AND ((EG (FIREABLE(r10)) OR !((FIREABLE(r5) OR FIREABLE(r10)))) OR ((!(FIREABLE(r5)) OR !(FIREABLE(r1))) OR ((FIREABLE(r3) OR FIREABLE(r6)) AND !(FIREABLE(r10)))))) AND !(AG (!(FIREABLE(r4))))) : E(EF... (shortened)
lola: formula length: 1222
lola: computing a collection of formulas
lola: RUNNING
lola: subprocess 0 will run for 221 seconds at most (--localtimelimit=0)
lola: ========================================
lola: ...considering subproblem: AG ((! FIREABLE(r9) OR (! FIREABLE(r7) OR (FIREABLE(r10) OR EF (! FIREABLE(r3))))))
lola: ========================================
lola: SUBTASK
lola: checking CTL
lola: processed formula: !(E(TRUE U !((! FIREABLE(r9) OR (! FIREABLE(r7) OR (FIREABLE(r10) OR E(TRUE U ! FIREABLE(r3))))))))
lola: processed formula length: 99
lola: 66 rewrites
lola: formula mentions 0 of 11 places; total mentions: 0
lola: closed formula file ERK-PT-100000-CTLFireability.task
lola: STORE
lola: using a bit-perfect encoder (--encoder=bit)
lola: using 24 bytes per marking, with 0 unused bits
lola: using a prefix tree store (--store=prefix)
lola: RUNNING
lola: CTL formula contains 2 significant temporal operators and needs 9 bytes of payload
lola: Child process aborted or communication problem between parent and child process
lola: subprocess 1 will run for 226 seconds at most (--localtimelimit=0)
lola: ========================================
lola: ...considering subproblem: AG (EF (FIREABLE(r11)))
lola: ========================================
lola: SUBTASK
lola: checking liveness
lola: liveness not yet implemented, converting to CTL...
lola: processed formula: !(E(TRUE U !(E(TRUE U FIREABLE(r11)))))
lola: processed formula length: 39
lola: 66 rewrites
lola: formula mentions 0 of 11 places; total mentions: 0
lola: closed formula file ERK-PT-100000-CTLFireability.task
lola: STORE
lola: using a bit-perfect encoder (--encoder=bit)
lola: using 24 bytes per marking, with 0 unused bits
lola: using a prefix tree store (--store=prefix)
lola: RUNNING
lola: CTL formula contains 2 significant temporal operators and needs 9 bytes of payload
lola: Child process aborted or communication problem between parent and child process
lola: subprocess 2 will run for 228 seconds at most (--localtimelimit=0)
lola: ========================================
lola: ...considering subproblem: EF (AG (FIREABLE(r6)))
lola: ========================================
lola: SUBTASK
lola: checking possible invariance
lola: possible invariance not yet implemented, converting to CTL...
lola: processed formula: E(TRUE U !(E(TRUE U !(FIREABLE(r6)))))
lola: processed formula length: 38
lola: 66 rewrites
lola: formula mentions 0 of 11 places; total mentions: 0
lola: closed formula file ERK-PT-100000-CTLFireability.task
lola: STORE
lola: using a bit-perfect encoder (--encoder=bit)
lola: using 24 bytes per marking, with 0 unused bits
lola: using a prefix tree store (--store=prefix)
lola: RUNNING
lola: CTL formula contains 2 significant temporal operators and needs 9 bytes of payload
lola: Child process aborted or communication problem between parent and child process
lola: subprocess 3 will run for 229 seconds at most (--localtimelimit=0)
lola: ========================================
lola: ...considering subproblem: AG (EF (FIREABLE(r8)))
lola: ========================================
lola: SUBTASK
lola: checking liveness
lola: liveness not yet implemented, converting to CTL...
lola: processed formula: !(E(TRUE U !(E(TRUE U FIREABLE(r8)))))
lola: processed formula length: 38
lola: 66 rewrites
lola: formula mentions 0 of 11 places; total mentions: 0
lola: closed formula file ERK-PT-100000-CTLFireability.task
lola: STORE
lola: using a bit-perfect encoder (--encoder=bit)
lola: using 24 bytes per marking, with 0 unused bits
lola: using a prefix tree store (--store=prefix)
lola: RUNNING
lola: CTL formula contains 2 significant temporal operators and needs 9 bytes of payload
lola: Child process aborted or communication problem between parent and child process
lola: subprocess 4 will run for 234 seconds at most (--localtimelimit=0)
lola: ========================================
lola: ...considering subproblem: (AG (FIREABLE(r1)) AND ((EG (FIREABLE(r10)) OR ((! FIREABLE(r5) AND ! FIREABLE(r10)) OR (! FIREABLE(r5) OR (! FIREABLE(r1) OR ((FIREABLE(r3) OR FIREABLE(r6)) AND ! FIREABLE(r10)))))) AND EF (FIREABLE(r4))))
lola: ========================================
lola: SUBTASK
lola: checking a Boolean combination of formulas
lola: RUNNING
lola: subprocess 4 will run for 234 seconds at most (--localtimelimit=0)
lola: ========================================
lola: ...considering subproblem: AG (FIREABLE(r1))
lola: ========================================
lola: SUBTASK
lola: checking invariance
lola: Planning: workflow for reachability check: search (--findpath=off)
lola: STORE
lola: using a bit-perfect encoder (--encoder=bit)
lola: using 24 bytes per marking, with 0 unused bits
lola: using a prefix tree store (--store=prefix)
lola: SEARCH
lola: using reachability graph (--search=depth)
lola: using reachability preserving stubborn set method with insertion algorithm (--stubborn=tarjan)
lola: RUNNING
lola: SUBRESULT
lola: result: no
lola: The predicate is not invariant.
lola: SUBRESULT
lola: result: no
lola: The Boolean predicate is false.
lola: ========================================
lola: ========================================
lola: subprocess 5 will run for 256 seconds at most (--localtimelimit=0)
lola: ========================================
lola: ...considering subproblem: E(EF ((FIREABLE(r2) AND FIREABLE(r1))) U AG ((FIREABLE(r4) AND FIREABLE(r6))))
lola: ========================================
lola: SUBTASK
lola: checking CTL
lola: processed formula: E(E(TRUE U (FIREABLE(r2) AND FIREABLE(r1))) U !(E(TRUE U !((FIREABLE(r4) AND FIREABLE(r6))))))
lola: processed formula length: 94
lola: 67 rewrites
lola: formula mentions 0 of 11 places; total mentions: 0
lola: closed formula file ERK-PT-100000-CTLFireability.task
lola: STORE
lola: using a bit-perfect encoder (--encoder=bit)
lola: using 24 bytes per marking, with 0 unused bits
lola: using a prefix tree store (--store=prefix)
lola: RUNNING
lola: CTL formula contains 3 significant temporal operators and needs 13 bytes of payload
lola: local time limit reached - aborting
lola: Child process aborted or communication problem between parent and child process
lola: subprocess 6 will run for 256 seconds at most (--localtimelimit=0)
lola: ========================================
lola: ...considering subproblem: EF (AX ((! FIREABLE(r8) AND ! FIREABLE(r7))))
lola: ========================================
lola: SUBTASK
lola: checking CTL
lola: processed formula: E(TRUE U AX((! FIREABLE(r8) AND ! FIREABLE(r7))))
lola: processed formula length: 49
lola: 66 rewrites
lola: formula mentions 0 of 11 places; total mentions: 0
lola: closed formula file ERK-PT-100000-CTLFireability.task
lola: STORE
lola: using a bit-perfect encoder (--encoder=bit)
lola: using 24 bytes per marking, with 0 unused bits
lola: using a prefix tree store (--store=prefix)
lola: RUNNING
lola: CTL formula contains 1 significant temporal operators and needs 5 bytes of payload
lola: SUBRESULT
lola: result: yes
lola: The net satisfies the given formula.
lola: ========================================
lola: subprocess 7 will run for 284 seconds at most (--localtimelimit=0)
lola: ========================================
lola: ...considering subproblem: AG (EX (FIREABLE(r8)))
lola: ========================================
lola: SUBTASK
lola: checking CTL
lola: processed formula: !(E(TRUE U !(EX(FIREABLE(r8)))))
lola: processed formula length: 32
lola: 66 rewrites
lola: formula mentions 0 of 11 places; total mentions: 0
lola: closed formula file ERK-PT-100000-CTLFireability.task
lola: STORE
lola: using a bit-perfect encoder (--encoder=bit)
lola: using 24 bytes per marking, with 0 unused bits
lola: using a prefix tree store (--store=prefix)
lola: RUNNING
lola: CTL formula contains 1 significant temporal operators and needs 5 bytes of payload
lola: SUBRESULT
lola: result: no
lola: The net does not satisfy the given formula.
lola: ========================================
lola: subprocess 8 will run for 320 seconds at most (--localtimelimit=0)
lola: ========================================
lola: ...considering subproblem: EF (AG (! FIREABLE(r6)))
lola: ========================================
lola: SUBTASK
lola: checking possible invariance
lola: possible invariance not yet implemented, converting to CTL...
lola: processed formula: E(TRUE U !(E(TRUE U !(! FIREABLE(r6)))))
lola: processed formula length: 40
lola: 66 rewrites
lola: formula mentions 0 of 11 places; total mentions: 0
lola: closed formula file ERK-PT-100000-CTLFireability.task
lola: STORE
lola: using a bit-perfect encoder (--encoder=bit)
lola: using 24 bytes per marking, with 0 unused bits
lola: using a prefix tree store (--store=prefix)
lola: RUNNING
lola: CTL formula contains 2 significant temporal operators and needs 9 bytes of payload
lola: Child process aborted or communication problem between parent and child process
lola: subprocess 9 will run for 342 seconds at most (--localtimelimit=0)
lola: ========================================
lola: ...considering subproblem: EF (AG (FIREABLE(r4)))
lola: ========================================
lola: SUBTASK
lola: checking possible invariance
lola: possible invariance not yet implemented, converting to CTL...
lola: processed formula: E(TRUE U !(E(TRUE U !(FIREABLE(r4)))))
lola: processed formula length: 38
lola: 66 rewrites
lola: formula mentions 0 of 11 places; total mentions: 0
lola: closed formula file ERK-PT-100000-CTLFireability.task
lola: STORE
lola: using a bit-perfect encoder (--encoder=bit)
lola: using 24 bytes per marking, with 0 unused bits
lola: using a prefix tree store (--store=prefix)
lola: RUNNING
lola: CTL formula contains 2 significant temporal operators and needs 9 bytes of payload
lola: Child process aborted or communication problem between parent and child process
lola: subprocess 10 will run for 367 seconds at most (--localtimelimit=0)
lola: ========================================
lola: ...considering subproblem: EF (EX ((! FIREABLE(r5) AND ! FIREABLE(r6))))
lola: ========================================
lola: SUBTASK
lola: checking CTL
lola: processed formula: E(TRUE U EX((! FIREABLE(r5) AND ! FIREABLE(r6))))
lola: processed formula length: 49
lola: 66 rewrites
lola: formula mentions 0 of 11 places; total mentions: 0
lola: closed formula file ERK-PT-100000-CTLFireability.task
lola: STORE
lola: using a bit-perfect encoder (--encoder=bit)
lola: using 24 bytes per marking, with 0 unused bits
lola: using a prefix tree store (--store=prefix)
lola: RUNNING
lola: CTL formula contains 1 significant temporal operators and needs 5 bytes of payload
lola: SUBRESULT
lola: result: yes
lola: The net satisfies the given formula.
lola: ========================================
lola: subprocess 11 will run for 440 seconds at most (--localtimelimit=0)
lola: ========================================
lola: ...considering subproblem: AX ((AF (! FIREABLE(r8)) OR (FIREABLE(r4) OR ((FIREABLE(r2) OR FIREABLE(r8)) AND (FIREABLE(r1) AND FIREABLE(r3))))))
lola: ========================================
lola: SUBTASK
lola: checking CTL
lola: processed formula: AX((A(TRUE U ! FIREABLE(r8)) OR (FIREABLE(r4) OR ((FIREABLE(r2) OR FIREABLE(r8)) AND (FIREABLE(r1) AND FIREABLE(r3))))))
lola: processed formula length: 120
lola: 66 rewrites
lola: formula mentions 0 of 11 places; total mentions: 0
lola: closed formula file ERK-PT-100000-CTLFireability.task
lola: STORE
lola: using a bit-perfect encoder (--encoder=bit)
lola: using 24 bytes per marking, with 0 unused bits
lola: using a prefix tree store (--store=prefix)
lola: RUNNING
lola: CTL formula contains 1 significant temporal operators and needs 5 bytes of payload
lola: Child process aborted or communication problem between parent and child process
lola: subprocess 12 will run for 519 seconds at most (--localtimelimit=0)
lola: ========================================
lola: ...considering subproblem: (AX (EG (FIREABLE(r10))) AND ! FIREABLE(r10))
lola: ========================================
lola: SUBTASK
lola: checking a Boolean combination of formulas
lola: RUNNING
lola: subprocess 12 will run for 519 seconds at most (--localtimelimit=0)
lola: ========================================
lola: ...considering subproblem: AX (EG (FIREABLE(r10)))
lola: ========================================
lola: SUBTASK
lola: checking CTL
lola: processed formula: AX(!(A(TRUE U !(FIREABLE(r10)))))
lola: processed formula length: 33
lola: 66 rewrites
lola: formula mentions 0 of 11 places; total mentions: 0
lola: closed formula file ERK-PT-100000-CTLFireability.task
lola: STORE
lola: using a bit-perfect encoder (--encoder=bit)
lola: using 24 bytes per marking, with 0 unused bits
lola: using a prefix tree store (--store=prefix)
lola: RUNNING
lola: CTL formula contains 1 significant temporal operators and needs 5 bytes of payload
lola: SUBRESULT
lola: result: no
lola: The net does not satisfy the given formula.
lola: ========================================
lola: SUBRESULT
lola: result: no
lola: The Boolean predicate is false.
lola: ========================================
lola: subprocess 13 will run for 692 seconds at most (--localtimelimit=0)
lola: ========================================
lola: ...considering subproblem: EG (((AF (FIREABLE(r6)) OR FIREABLE(r1)) AND EF (! FIREABLE(r4))))
lola: ========================================
lola: SUBTASK
lola: checking CTL
lola: processed formula: !(A(TRUE U !(((A(TRUE U FIREABLE(r6)) OR FIREABLE(r1)) AND E(TRUE U ! FIREABLE(r4))))))
lola: processed formula length: 87
lola: 67 rewrites
lola: formula mentions 0 of 11 places; total mentions: 0
lola: closed formula file ERK-PT-100000-CTLFireability.task
lola: STORE
lola: using a bit-perfect encoder (--encoder=bit)
lola: using 24 bytes per marking, with 0 unused bits
lola: using a prefix tree store (--store=prefix)
lola: RUNNING
lola: CTL formula contains 3 significant temporal operators and needs 13 bytes of payload
lola: Child process aborted or communication problem between parent and child process
lola: subprocess 14 will run for 995 seconds at most (--localtimelimit=0)
lola: ========================================
lola: ...considering subproblem: (FIREABLE(r3) AND ((FIREABLE(r3) OR (FIREABLE(r11) AND (FIREABLE(r1) AND (FIREABLE(r3) AND FIREABLE(r10))))) AND (E(! FIREABLE(r4) R ! FIREABLE(r10)) AND (E((FIREABLE(r6) AND FIREABLE(r10)) U (FIREABLE(r6) AND FIREABLE(r9))) AND (E(FIREABLE(r3) U FIREABLE(r7)) OR (! FIREABLE(r11) AND EX (FIREABLE(r11))))))))
lola: ========================================
lola: SUBTASK
lola: checking a Boolean combination of formulas
lola: RUNNING
lola: subprocess 14 will run for 995 seconds at most (--localtimelimit=0)
lola: ========================================
lola: ...considering subproblem: FIREABLE(r3)
lola: ========================================
lola: SUBTASK
lola: checking initial satisfaction
lola: processed formula with 0 atomic propositions
lola: closed formula file ERK-PT-100000-CTLFireability.task
lola: RUNNING
lola: SUBRESULT
lola: result: no
lola: The net violates the given property already in its initial state.
lola: ========================================
lola: SUBRESULT
lola: result: no
lola: The Boolean predicate is false.
lola: ========================================
lola: subprocess 15 will run for 1991 seconds at most (--localtimelimit=0)
lola: ========================================
lola: ...considering subproblem: FIREABLE(r7)
lola: ========================================
lola: SUBTASK
lola: checking initial satisfaction
lola: processed formula with 0 atomic propositions
lola: closed formula file ERK-PT-100000-CTLFireability.task
lola: RUNNING
lola: SUBRESULT
lola: result: no
lola: The net violates the given property already in its initial state.
lola: RESULT
lola: summary: unknown unknown unknown unknown no unknown yes no unknown unknown yes unknown no unknown no no
lola: ========================================

BK_STOP 1463528008349

--------------------
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="ERK-PT-100000"
export BK_EXAMINATION="CTLFireability"
export BK_TOOL="lola"
export BK_RESULT_DIR="/root/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/ERK-PT-100000.tgz
mv ERK-PT-100000 execution

# this is for BenchKit: explicit launching of the test

cd execution
echo "====================================================================="
echo " Generated by BenchKit 2-2979"
echo " Executing tool lola"
echo " Input is ERK-PT-100000, 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 r038kn-smll-146351480500130"
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 ;