./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-data-race.prp --file ../../sv-benchmarks/c/pthread-ext/02_inc_cas.i --full-output --architecture 32bit
--------------------------------------------------------------------------------
Checking for data races
Using default analysis
Version 2329fc70
Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3e748aa-8f38-4dd0-b396-7f9ace77dab4/bin/ugemcutter-rbreBovr8w/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3e748aa-8f38-4dd0-b396-7f9ace77dab4/bin/ugemcutter-rbreBovr8w/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3e748aa-8f38-4dd0-b396-7f9ace77dab4/bin/ugemcutter-rbreBovr8w/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3e748aa-8f38-4dd0-b396-7f9ace77dab4/bin/ugemcutter-rbreBovr8w/config/GemCutterReach.xml -i ../../sv-benchmarks/c/pthread-ext/02_inc_cas.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3e748aa-8f38-4dd0-b396-7f9ace77dab4/bin/ugemcutter-rbreBovr8w/config/svcomp-DataRace-32bit-GemCutter_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3e748aa-8f38-4dd0-b396-7f9ace77dab4/bin/ugemcutter-rbreBovr8w --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! data-race) )
--witnessprinter.graph.data.producer GemCutter --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ede09850ec25b369afc0cd16258beff942f9fc7c5304532be31fd5925a934e14
--- Real Ultimate output ---
[0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset.
This is Ultimate 0.2.2-dev-2329fc7
[2022-12-13 09:10:35,553 INFO L177 SettingsManager]: Resetting all preferences to default values...
[2022-12-13 09:10:35,555 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values
[2022-12-13 09:10:35,567 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2022-12-13 09:10:35,568 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2022-12-13 09:10:35,568 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2022-12-13 09:10:35,569 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2022-12-13 09:10:35,570 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values
[2022-12-13 09:10:35,571 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values
[2022-12-13 09:10:35,572 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values
[2022-12-13 09:10:35,573 INFO L181 SettingsManager]: Resetting Sifa preferences to default values
[2022-12-13 09:10:35,573 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2022-12-13 09:10:35,574 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values
[2022-12-13 09:10:35,574 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values
[2022-12-13 09:10:35,575 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2022-12-13 09:10:35,576 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values
[2022-12-13 09:10:35,577 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2022-12-13 09:10:35,577 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2022-12-13 09:10:35,578 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2022-12-13 09:10:35,580 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values
[2022-12-13 09:10:35,581 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2022-12-13 09:10:35,582 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values
[2022-12-13 09:10:35,582 INFO L181 SettingsManager]: Resetting Referee preferences to default values
[2022-12-13 09:10:35,583 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values
[2022-12-13 09:10:35,585 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2022-12-13 09:10:35,586 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2022-12-13 09:10:35,586 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values
[2022-12-13 09:10:35,586 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values
[2022-12-13 09:10:35,587 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values
[2022-12-13 09:10:35,587 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring...
[2022-12-13 09:10:35,588 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values
[2022-12-13 09:10:35,588 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2022-12-13 09:10:35,589 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values
[2022-12-13 09:10:35,589 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values
[2022-12-13 09:10:35,590 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2022-12-13 09:10:35,590 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values
[2022-12-13 09:10:35,590 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2022-12-13 09:10:35,591 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring...
[2022-12-13 09:10:35,591 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values
[2022-12-13 09:10:35,591 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values
[2022-12-13 09:10:35,592 INFO L188 SettingsManager]: Finished resetting all preferences to default values...
[2022-12-13 09:10:35,593 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3e748aa-8f38-4dd0-b396-7f9ace77dab4/bin/ugemcutter-rbreBovr8w/config/svcomp-DataRace-32bit-GemCutter_Default.epf
[2022-12-13 09:10:35,607 INFO L113 SettingsManager]: Loading preferences was successful
[2022-12-13 09:10:35,607 INFO L115 SettingsManager]: Preferences different from defaults after loading the file:
[2022-12-13 09:10:35,607 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2022-12-13 09:10:35,607 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2022-12-13 09:10:35,608 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2022-12-13 09:10:35,608 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2022-12-13 09:10:35,608 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2022-12-13 09:10:35,608 INFO L138 SettingsManager]: * Create parallel compositions if possible=false
[2022-12-13 09:10:35,609 INFO L138 SettingsManager]: * Use SBE=true
[2022-12-13 09:10:35,609 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2022-12-13 09:10:35,609 INFO L138 SettingsManager]: * sizeof long=4
[2022-12-13 09:10:35,609 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false
[2022-12-13 09:10:35,609 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true
[2022-12-13 09:10:35,609 INFO L138 SettingsManager]: * sizeof POINTER=4
[2022-12-13 09:10:35,609 INFO L138 SettingsManager]: * Check division by zero=IGNORE
[2022-12-13 09:10:35,609 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE
[2022-12-13 09:10:35,610 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE
[2022-12-13 09:10:35,610 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE
[2022-12-13 09:10:35,610 INFO L138 SettingsManager]: * Check absence of data races in concurrent programs=true
[2022-12-13 09:10:35,610 INFO L138 SettingsManager]: * sizeof long double=12
[2022-12-13 09:10:35,610 INFO L138 SettingsManager]: * Check if freed pointer was valid=false
[2022-12-13 09:10:35,610 INFO L138 SettingsManager]: * Use constant arrays=true
[2022-12-13 09:10:35,610 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE
[2022-12-13 09:10:35,610 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2022-12-13 09:10:35,610 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements
[2022-12-13 09:10:35,611 INFO L138 SettingsManager]: * To the following directory=./dump/
[2022-12-13 09:10:35,611 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode
[2022-12-13 09:10:35,611 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-12-13 09:10:35,611 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2022-12-13 09:10:35,611 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP
[2022-12-13 09:10:35,611 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2022-12-13 09:10:35,611 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL
[2022-12-13 09:10:35,611 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2022-12-13 09:10:35,612 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false
[2022-12-13 09:10:35,612 INFO L138 SettingsManager]: * Abstraction used for commutativity in POR=VARIABLES_GLOBAL
[2022-12-13 09:10:35,612 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PARTIAL_ORDER_FA
[2022-12-13 09:10:35,612 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2022-12-13 09:10:35,612 INFO L138 SettingsManager]: * CEGAR restart behaviour=ONE_CEGAR_PER_THREAD_INSTANCE
[2022-12-13 09:10:35,612 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=PERSISTENT_SLEEP_NEW_STATES_FIXEDORDER
[2022-12-13 09:10:35,612 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3e748aa-8f38-4dd0-b396-7f9ace77dab4/bin/ugemcutter-rbreBovr8w/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int)
WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3e748aa-8f38-4dd0-b396-7f9ace77dab4/bin/ugemcutter-rbreBovr8w
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! data-race) )
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> GemCutter
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ede09850ec25b369afc0cd16258beff942f9fc7c5304532be31fd5925a934e14
[2022-12-13 09:10:35,779 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp
[2022-12-13 09:10:35,796 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2022-12-13 09:10:35,798 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2022-12-13 09:10:35,799 INFO L271 PluginConnector]: Initializing CDTParser...
[2022-12-13 09:10:35,799 INFO L275 PluginConnector]: CDTParser initialized
[2022-12-13 09:10:35,800 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3e748aa-8f38-4dd0-b396-7f9ace77dab4/bin/ugemcutter-rbreBovr8w/../../sv-benchmarks/c/pthread-ext/02_inc_cas.i
[2022-12-13 09:10:38,414 INFO L500 CDTParser]: Created temporary CDT project at NULL
[2022-12-13 09:10:38,569 INFO L351 CDTParser]: Found 1 translation units.
[2022-12-13 09:10:38,570 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3e748aa-8f38-4dd0-b396-7f9ace77dab4/sv-benchmarks/c/pthread-ext/02_inc_cas.i
[2022-12-13 09:10:38,579 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3e748aa-8f38-4dd0-b396-7f9ace77dab4/bin/ugemcutter-rbreBovr8w/data/7ae684bb9/ca3c5d88a3804427854d26b916fef2b9/FLAG7b6ad4515
[2022-12-13 09:10:38,590 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3e748aa-8f38-4dd0-b396-7f9ace77dab4/bin/ugemcutter-rbreBovr8w/data/7ae684bb9/ca3c5d88a3804427854d26b916fef2b9
[2022-12-13 09:10:38,592 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2022-12-13 09:10:38,593 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements.
[2022-12-13 09:10:38,595 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2022-12-13 09:10:38,595 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator...
[2022-12-13 09:10:38,598 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized
[2022-12-13 09:10:38,599 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 09:10:38" (1/1) ...
[2022-12-13 09:10:38,600 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@163d0a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:10:38, skipping insertion in model container
[2022-12-13 09:10:38,600 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 09:10:38" (1/1) ...
[2022-12-13 09:10:38,606 INFO L145 MainTranslator]: Starting translation in SV-COMP mode
[2022-12-13 09:10:38,638 INFO L178 MainTranslator]: Built tables and reachable declarations
[2022-12-13 09:10:38,771 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16
[2022-12-13 09:10:38,864 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin
[2022-12-13 09:10:38,866 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end
[2022-12-13 09:10:38,868 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin
[2022-12-13 09:10:38,869 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3e748aa-8f38-4dd0-b396-7f9ace77dab4/sv-benchmarks/c/pthread-ext/02_inc_cas.i[30873,30886]
[2022-12-13 09:10:38,870 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end
[2022-12-13 09:10:38,872 INFO L210 PostProcessor]: Analyzing one entry point: main
[2022-12-13 09:10:38,878 INFO L203 MainTranslator]: Completed pre-run
[2022-12-13 09:10:38,889 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16
[2022-12-13 09:10:38,907 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin
[2022-12-13 09:10:38,907 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end
[2022-12-13 09:10:38,908 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin
[2022-12-13 09:10:38,909 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3e748aa-8f38-4dd0-b396-7f9ace77dab4/sv-benchmarks/c/pthread-ext/02_inc_cas.i[30873,30886]
[2022-12-13 09:10:38,909 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end
[2022-12-13 09:10:38,910 INFO L210 PostProcessor]: Analyzing one entry point: main
[2022-12-13 09:10:38,930 INFO L208 MainTranslator]: Completed translation
[2022-12-13 09:10:38,930 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:10:38 WrapperNode
[2022-12-13 09:10:38,930 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2022-12-13 09:10:38,931 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2022-12-13 09:10:38,931 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner...
[2022-12-13 09:10:38,931 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized
[2022-12-13 09:10:38,936 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:10:38" (1/1) ...
[2022-12-13 09:10:38,945 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:10:38" (1/1) ...
[2022-12-13 09:10:38,962 INFO L138 Inliner]: procedures = 171, calls = 29, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 116
[2022-12-13 09:10:38,962 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2022-12-13 09:10:38,963 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2022-12-13 09:10:38,963 INFO L271 PluginConnector]: Initializing Boogie Preprocessor...
[2022-12-13 09:10:38,963 INFO L275 PluginConnector]: Boogie Preprocessor initialized
[2022-12-13 09:10:38,970 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:10:38" (1/1) ...
[2022-12-13 09:10:38,970 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:10:38" (1/1) ...
[2022-12-13 09:10:38,972 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:10:38" (1/1) ...
[2022-12-13 09:10:38,973 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:10:38" (1/1) ...
[2022-12-13 09:10:38,979 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:10:38" (1/1) ...
[2022-12-13 09:10:38,981 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:10:38" (1/1) ...
[2022-12-13 09:10:38,983 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:10:38" (1/1) ...
[2022-12-13 09:10:38,984 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:10:38" (1/1) ...
[2022-12-13 09:10:38,986 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2022-12-13 09:10:38,986 INFO L113 PluginConnector]: ------------------------RCFGBuilder----------------------------
[2022-12-13 09:10:38,986 INFO L271 PluginConnector]: Initializing RCFGBuilder...
[2022-12-13 09:10:38,986 INFO L275 PluginConnector]: RCFGBuilder initialized
[2022-12-13 09:10:38,987 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:10:38" (1/1) ...
[2022-12-13 09:10:38,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-12-13 09:10:39,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3e748aa-8f38-4dd0-b396-7f9ace77dab4/bin/ugemcutter-rbreBovr8w/z3
[2022-12-13 09:10:39,011 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3e748aa-8f38-4dd0-b396-7f9ace77dab4/bin/ugemcutter-rbreBovr8w/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
[2022-12-13 09:10:39,013 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3e748aa-8f38-4dd0-b396-7f9ace77dab4/bin/ugemcutter-rbreBovr8w/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process
[2022-12-13 09:10:39,046 INFO L130 BoogieDeclarations]: Found specification of procedure read~int
[2022-12-13 09:10:39,046 INFO L130 BoogieDeclarations]: Found specification of procedure thr1
[2022-12-13 09:10:39,046 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1
[2022-12-13 09:10:39,046 INFO L130 BoogieDeclarations]: Found specification of procedure write~int
[2022-12-13 09:10:39,046 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin
[2022-12-13 09:10:39,046 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2022-12-13 09:10:39,046 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack
[2022-12-13 09:10:39,047 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2022-12-13 09:10:39,047 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int
[2022-12-13 09:10:39,047 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end
[2022-12-13 09:10:39,047 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2022-12-13 09:10:39,047 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2022-12-13 09:10:39,048 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement
[2022-12-13 09:10:39,153 INFO L235 CfgBuilder]: Building ICFG
[2022-12-13 09:10:39,155 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation
[2022-12-13 09:10:39,366 INFO L276 CfgBuilder]: Performing block encoding
[2022-12-13 09:10:39,481 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2022-12-13 09:10:39,481 INFO L300 CfgBuilder]: Removed 2 assume(true) statements.
[2022-12-13 09:10:39,482 ERROR L334 CfgBuilder]: Unexpected successor node of atomic block begin: L718-3 is neither atomic block end nor a sink node.
[2022-12-13 09:10:39,483 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder has thrown an exception:
java.lang.UnsupportedOperationException: Large block encoding incomplete: Is there illegal control flow (e.g. loops) within an atomic block?
at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder.createIcfg(CfgBuilder.java:303)
at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.RCFGBuilderObserver.process(RCFGBuilderObserver.java:88)
at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.DFSTreeWalker.runObserver(DFSTreeWalker.java:65)
at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.BaseWalker.runObserver(BaseWalker.java:93)
at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.BaseWalker.run(BaseWalker.java:86)
at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167)
at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151)
at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128)
at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232)
at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226)
at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142)
at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104)
at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320)
at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145)
at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63)
[2022-12-13 09:10:39,486 INFO L158 Benchmark]: Toolchain (without parser) took 891.86ms. Allocated memory was 115.3MB in the beginning and 167.8MB in the end (delta: 52.4MB). Free memory was 79.2MB in the beginning and 111.0MB in the end (delta: -31.8MB). Peak memory consumption was 44.0MB. Max. memory is 16.1GB.
[2022-12-13 09:10:39,486 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 115.3MB. Free memory is still 90.6MB. There was no memory consumed. Max. memory is 16.1GB.
[2022-12-13 09:10:39,487 INFO L158 Benchmark]: CACSL2BoogieTranslator took 335.72ms. Allocated memory is still 115.3MB. Free memory was 79.2MB in the beginning and 58.7MB in the end (delta: 20.5MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB.
[2022-12-13 09:10:39,487 INFO L158 Benchmark]: Boogie Procedure Inliner took 31.46ms. Allocated memory is still 115.3MB. Free memory was 58.7MB in the beginning and 56.3MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB.
[2022-12-13 09:10:39,487 INFO L158 Benchmark]: Boogie Preprocessor took 23.10ms. Allocated memory is still 115.3MB. Free memory was 56.3MB in the beginning and 54.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB.
[2022-12-13 09:10:39,488 INFO L158 Benchmark]: RCFGBuilder took 498.35ms. Allocated memory was 115.3MB in the beginning and 167.8MB in the end (delta: 52.4MB). Free memory was 54.2MB in the beginning and 111.0MB in the end (delta: -56.9MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB.
[2022-12-13 09:10:39,490 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] #######################
--- Results ---
* Results from de.uni_freiburg.informatik.ultimate.core:
- StatisticsResult: Toolchain Benchmarks
Benchmark results are:
* CDTParser took 0.11ms. Allocated memory is still 115.3MB. Free memory is still 90.6MB. There was no memory consumed. Max. memory is 16.1GB.
* CACSL2BoogieTranslator took 335.72ms. Allocated memory is still 115.3MB. Free memory was 79.2MB in the beginning and 58.7MB in the end (delta: 20.5MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB.
* Boogie Procedure Inliner took 31.46ms. Allocated memory is still 115.3MB. Free memory was 58.7MB in the beginning and 56.3MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB.
* Boogie Preprocessor took 23.10ms. Allocated memory is still 115.3MB. Free memory was 56.3MB in the beginning and 54.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB.
* RCFGBuilder took 498.35ms. Allocated memory was 115.3MB in the beginning and 167.8MB in the end (delta: 52.4MB). Free memory was 54.2MB in the beginning and 111.0MB in the end (delta: -56.9MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB.
* Results from de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder:
- ExceptionOrErrorResult: UnsupportedOperationException: Large block encoding incomplete: Is there illegal control flow (e.g. loops) within an atomic block?
de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: UnsupportedOperationException: Large block encoding incomplete: Is there illegal control flow (e.g. loops) within an atomic block?: de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder.createIcfg(CfgBuilder.java:303)
RESULT: Ultimate could not prove your program: Toolchain returned no result.
[2022-12-13 09:10:39,503 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3e748aa-8f38-4dd0-b396-7f9ace77dab4/bin/ugemcutter-rbreBovr8w/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0
Received shutdown request...
--- End real Ultimate output ---
Execution finished normally
Using bit-precise analysis
Retrying with bit-precise analysis
### Bit-precise run ###
Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3e748aa-8f38-4dd0-b396-7f9ace77dab4/bin/ugemcutter-rbreBovr8w/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3e748aa-8f38-4dd0-b396-7f9ace77dab4/bin/ugemcutter-rbreBovr8w/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3e748aa-8f38-4dd0-b396-7f9ace77dab4/bin/ugemcutter-rbreBovr8w/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3e748aa-8f38-4dd0-b396-7f9ace77dab4/bin/ugemcutter-rbreBovr8w/config/GemCutterReach.xml -i ../../sv-benchmarks/c/pthread-ext/02_inc_cas.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3e748aa-8f38-4dd0-b396-7f9ace77dab4/bin/ugemcutter-rbreBovr8w/config/svcomp-DataRace-32bit-GemCutter_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3e748aa-8f38-4dd0-b396-7f9ace77dab4/bin/ugemcutter-rbreBovr8w --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! data-race) )
--witnessprinter.graph.data.producer GemCutter --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ede09850ec25b369afc0cd16258beff942f9fc7c5304532be31fd5925a934e14
--- Real Ultimate output ---
[0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset.
This is Ultimate 0.2.2-dev-2329fc7
[2022-12-13 09:10:41,232 INFO L177 SettingsManager]: Resetting all preferences to default values...
[2022-12-13 09:10:41,234 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values
[2022-12-13 09:10:41,249 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2022-12-13 09:10:41,250 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2022-12-13 09:10:41,250 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2022-12-13 09:10:41,251 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2022-12-13 09:10:41,252 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values
[2022-12-13 09:10:41,253 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values
[2022-12-13 09:10:41,254 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values
[2022-12-13 09:10:41,254 INFO L181 SettingsManager]: Resetting Sifa preferences to default values
[2022-12-13 09:10:41,255 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2022-12-13 09:10:41,255 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values
[2022-12-13 09:10:41,256 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values
[2022-12-13 09:10:41,257 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2022-12-13 09:10:41,257 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values
[2022-12-13 09:10:41,258 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2022-12-13 09:10:41,258 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2022-12-13 09:10:41,259 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2022-12-13 09:10:41,260 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values
[2022-12-13 09:10:41,261 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2022-12-13 09:10:41,262 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values
[2022-12-13 09:10:41,263 INFO L181 SettingsManager]: Resetting Referee preferences to default values
[2022-12-13 09:10:41,264 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values
[2022-12-13 09:10:41,266 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2022-12-13 09:10:41,266 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2022-12-13 09:10:41,266 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values
[2022-12-13 09:10:41,267 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values
[2022-12-13 09:10:41,267 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values
[2022-12-13 09:10:41,268 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring...
[2022-12-13 09:10:41,268 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values
[2022-12-13 09:10:41,268 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2022-12-13 09:10:41,269 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values
[2022-12-13 09:10:41,269 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values
[2022-12-13 09:10:41,270 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2022-12-13 09:10:41,270 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values
[2022-12-13 09:10:41,271 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2022-12-13 09:10:41,271 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring...
[2022-12-13 09:10:41,271 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values
[2022-12-13 09:10:41,272 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values
[2022-12-13 09:10:41,272 INFO L188 SettingsManager]: Finished resetting all preferences to default values...
[2022-12-13 09:10:41,273 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3e748aa-8f38-4dd0-b396-7f9ace77dab4/bin/ugemcutter-rbreBovr8w/config/svcomp-DataRace-32bit-GemCutter_Bitvector.epf
[2022-12-13 09:10:41,288 INFO L113 SettingsManager]: Loading preferences was successful
[2022-12-13 09:10:41,289 INFO L115 SettingsManager]: Preferences different from defaults after loading the file:
[2022-12-13 09:10:41,289 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2022-12-13 09:10:41,289 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2022-12-13 09:10:41,289 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2022-12-13 09:10:41,289 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2022-12-13 09:10:41,290 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2022-12-13 09:10:41,290 INFO L138 SettingsManager]: * Create parallel compositions if possible=false
[2022-12-13 09:10:41,290 INFO L138 SettingsManager]: * Use SBE=true
[2022-12-13 09:10:41,290 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2022-12-13 09:10:41,290 INFO L138 SettingsManager]: * sizeof long=4
[2022-12-13 09:10:41,291 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false
[2022-12-13 09:10:41,291 INFO L138 SettingsManager]: * sizeof POINTER=4
[2022-12-13 09:10:41,291 INFO L138 SettingsManager]: * Check division by zero=IGNORE
[2022-12-13 09:10:41,291 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE
[2022-12-13 09:10:41,291 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE
[2022-12-13 09:10:41,291 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE
[2022-12-13 09:10:41,291 INFO L138 SettingsManager]: * Check absence of data races in concurrent programs=true
[2022-12-13 09:10:41,291 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true
[2022-12-13 09:10:41,291 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution
[2022-12-13 09:10:41,291 INFO L138 SettingsManager]: * sizeof long double=12
[2022-12-13 09:10:41,291 INFO L138 SettingsManager]: * Check if freed pointer was valid=false
[2022-12-13 09:10:41,292 INFO L138 SettingsManager]: * Use constant arrays=true
[2022-12-13 09:10:41,292 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE
[2022-12-13 09:10:41,292 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2022-12-13 09:10:41,292 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements
[2022-12-13 09:10:41,292 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode
[2022-12-13 09:10:41,292 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-12-13 09:10:41,292 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2022-12-13 09:10:41,292 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP
[2022-12-13 09:10:41,292 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2022-12-13 09:10:41,292 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF
[2022-12-13 09:10:41,293 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt
[2022-12-13 09:10:41,293 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false
[2022-12-13 09:10:41,293 INFO L138 SettingsManager]: * Abstraction used for commutativity in POR=VARIABLES_GLOBAL
[2022-12-13 09:10:41,293 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PARTIAL_ORDER_FA
[2022-12-13 09:10:41,293 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2022-12-13 09:10:41,293 INFO L138 SettingsManager]: * CEGAR restart behaviour=ONE_CEGAR_PER_THREAD_INSTANCE
[2022-12-13 09:10:41,293 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=PERSISTENT_SLEEP_NEW_STATES_FIXEDORDER
[2022-12-13 09:10:41,293 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode
[2022-12-13 09:10:41,293 INFO L138 SettingsManager]: * Logic for external solver=AUFBV
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3e748aa-8f38-4dd0-b396-7f9ace77dab4/bin/ugemcutter-rbreBovr8w/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int)
WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3e748aa-8f38-4dd0-b396-7f9ace77dab4/bin/ugemcutter-rbreBovr8w
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! data-race) )
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> GemCutter
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ede09850ec25b369afc0cd16258beff942f9fc7c5304532be31fd5925a934e14
[2022-12-13 09:10:41,538 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp
[2022-12-13 09:10:41,554 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2022-12-13 09:10:41,556 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2022-12-13 09:10:41,557 INFO L271 PluginConnector]: Initializing CDTParser...
[2022-12-13 09:10:41,558 INFO L275 PluginConnector]: CDTParser initialized
[2022-12-13 09:10:41,559 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3e748aa-8f38-4dd0-b396-7f9ace77dab4/bin/ugemcutter-rbreBovr8w/../../sv-benchmarks/c/pthread-ext/02_inc_cas.i
[2022-12-13 09:10:44,137 INFO L500 CDTParser]: Created temporary CDT project at NULL
[2022-12-13 09:10:44,338 INFO L351 CDTParser]: Found 1 translation units.
[2022-12-13 09:10:44,338 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3e748aa-8f38-4dd0-b396-7f9ace77dab4/sv-benchmarks/c/pthread-ext/02_inc_cas.i
[2022-12-13 09:10:44,346 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3e748aa-8f38-4dd0-b396-7f9ace77dab4/bin/ugemcutter-rbreBovr8w/data/3a42d99e4/3a84a25322a04ba7866668baed744f36/FLAG497392a2e
[2022-12-13 09:10:44,695 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3e748aa-8f38-4dd0-b396-7f9ace77dab4/bin/ugemcutter-rbreBovr8w/data/3a42d99e4/3a84a25322a04ba7866668baed744f36
[2022-12-13 09:10:44,697 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2022-12-13 09:10:44,698 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements.
[2022-12-13 09:10:44,698 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2022-12-13 09:10:44,698 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator...
[2022-12-13 09:10:44,701 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized
[2022-12-13 09:10:44,701 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 09:10:44" (1/1) ...
[2022-12-13 09:10:44,702 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78f8502e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:10:44, skipping insertion in model container
[2022-12-13 09:10:44,702 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 09:10:44" (1/1) ...
[2022-12-13 09:10:44,707 INFO L145 MainTranslator]: Starting translation in SV-COMP mode
[2022-12-13 09:10:44,729 INFO L178 MainTranslator]: Built tables and reachable declarations
[2022-12-13 09:10:44,840 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16
[2022-12-13 09:10:44,931 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin
[2022-12-13 09:10:44,933 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end
[2022-12-13 09:10:44,936 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin
[2022-12-13 09:10:44,937 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3e748aa-8f38-4dd0-b396-7f9ace77dab4/sv-benchmarks/c/pthread-ext/02_inc_cas.i[30873,30886]
[2022-12-13 09:10:44,937 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end
[2022-12-13 09:10:44,940 INFO L210 PostProcessor]: Analyzing one entry point: main
[2022-12-13 09:10:44,949 INFO L203 MainTranslator]: Completed pre-run
[2022-12-13 09:10:44,960 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16
[2022-12-13 09:10:44,978 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin
[2022-12-13 09:10:44,979 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end
[2022-12-13 09:10:44,980 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin
[2022-12-13 09:10:44,981 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3e748aa-8f38-4dd0-b396-7f9ace77dab4/sv-benchmarks/c/pthread-ext/02_inc_cas.i[30873,30886]
[2022-12-13 09:10:44,981 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end
[2022-12-13 09:10:44,982 INFO L210 PostProcessor]: Analyzing one entry point: main
[2022-12-13 09:10:45,006 INFO L208 MainTranslator]: Completed translation
[2022-12-13 09:10:45,007 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:10:45 WrapperNode
[2022-12-13 09:10:45,007 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2022-12-13 09:10:45,008 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2022-12-13 09:10:45,008 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner...
[2022-12-13 09:10:45,008 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized
[2022-12-13 09:10:45,023 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:10:45" (1/1) ...
[2022-12-13 09:10:45,045 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:10:45" (1/1) ...
[2022-12-13 09:10:45,066 INFO L138 Inliner]: procedures = 175, calls = 29, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 117
[2022-12-13 09:10:45,067 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2022-12-13 09:10:45,067 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2022-12-13 09:10:45,067 INFO L271 PluginConnector]: Initializing Boogie Preprocessor...
[2022-12-13 09:10:45,068 INFO L275 PluginConnector]: Boogie Preprocessor initialized
[2022-12-13 09:10:45,076 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:10:45" (1/1) ...
[2022-12-13 09:10:45,076 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:10:45" (1/1) ...
[2022-12-13 09:10:45,080 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:10:45" (1/1) ...
[2022-12-13 09:10:45,080 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:10:45" (1/1) ...
[2022-12-13 09:10:45,091 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:10:45" (1/1) ...
[2022-12-13 09:10:45,094 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:10:45" (1/1) ...
[2022-12-13 09:10:45,096 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:10:45" (1/1) ...
[2022-12-13 09:10:45,098 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:10:45" (1/1) ...
[2022-12-13 09:10:45,101 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2022-12-13 09:10:45,102 INFO L113 PluginConnector]: ------------------------RCFGBuilder----------------------------
[2022-12-13 09:10:45,102 INFO L271 PluginConnector]: Initializing RCFGBuilder...
[2022-12-13 09:10:45,102 INFO L275 PluginConnector]: RCFGBuilder initialized
[2022-12-13 09:10:45,103 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:10:45" (1/1) ...
[2022-12-13 09:10:45,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-12-13 09:10:45,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3e748aa-8f38-4dd0-b396-7f9ace77dab4/bin/ugemcutter-rbreBovr8w/z3
[2022-12-13 09:10:45,132 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3e748aa-8f38-4dd0-b396-7f9ace77dab4/bin/ugemcutter-rbreBovr8w/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
[2022-12-13 09:10:45,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3e748aa-8f38-4dd0-b396-7f9ace77dab4/bin/ugemcutter-rbreBovr8w/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process
[2022-12-13 09:10:45,158 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4
[2022-12-13 09:10:45,158 INFO L130 BoogieDeclarations]: Found specification of procedure thr1
[2022-12-13 09:10:45,158 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1
[2022-12-13 09:10:45,158 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin
[2022-12-13 09:10:45,158 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2022-12-13 09:10:45,158 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack
[2022-12-13 09:10:45,159 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2022-12-13 09:10:45,159 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4
[2022-12-13 09:10:45,159 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1
[2022-12-13 09:10:45,159 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4
[2022-12-13 09:10:45,159 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end
[2022-12-13 09:10:45,159 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2022-12-13 09:10:45,159 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2022-12-13 09:10:45,160 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement
[2022-12-13 09:10:45,256 INFO L235 CfgBuilder]: Building ICFG
[2022-12-13 09:10:45,258 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation
[2022-12-13 09:10:45,525 INFO L276 CfgBuilder]: Performing block encoding
[2022-12-13 09:10:45,694 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2022-12-13 09:10:45,694 INFO L300 CfgBuilder]: Removed 2 assume(true) statements.
[2022-12-13 09:10:45,695 ERROR L334 CfgBuilder]: Unexpected successor node of atomic block begin: L718-3 is neither atomic block end nor a sink node.
[2022-12-13 09:10:45,695 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder has thrown an exception:
java.lang.UnsupportedOperationException: Large block encoding incomplete: Is there illegal control flow (e.g. loops) within an atomic block?
at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder.createIcfg(CfgBuilder.java:303)
at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.RCFGBuilderObserver.process(RCFGBuilderObserver.java:88)
at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.DFSTreeWalker.runObserver(DFSTreeWalker.java:65)
at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.BaseWalker.runObserver(BaseWalker.java:93)
at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.BaseWalker.run(BaseWalker.java:86)
at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167)
at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151)
at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128)
at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232)
at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226)
at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142)
at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104)
at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320)
at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145)
at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63)
[2022-12-13 09:10:45,698 INFO L158 Benchmark]: Toolchain (without parser) took 1000.17ms. Allocated memory was 77.6MB in the beginning and 94.4MB in the end (delta: 16.8MB). Free memory was 54.4MB in the beginning and 48.3MB in the end (delta: 6.1MB). Peak memory consumption was 33.8MB. Max. memory is 16.1GB.
[2022-12-13 09:10:45,699 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 77.6MB. Free memory is still 56.3MB. There was no memory consumed. Max. memory is 16.1GB.
[2022-12-13 09:10:45,699 INFO L158 Benchmark]: CACSL2BoogieTranslator took 308.74ms. Allocated memory is still 77.6MB. Free memory was 54.2MB in the beginning and 32.5MB in the end (delta: 21.6MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB.
[2022-12-13 09:10:45,699 INFO L158 Benchmark]: Boogie Procedure Inliner took 59.19ms. Allocated memory is still 77.6MB. Free memory was 32.5MB in the beginning and 54.9MB in the end (delta: -22.4MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB.
[2022-12-13 09:10:45,700 INFO L158 Benchmark]: Boogie Preprocessor took 34.18ms. Allocated memory is still 77.6MB. Free memory was 54.9MB in the beginning and 52.4MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB.
[2022-12-13 09:10:45,701 INFO L158 Benchmark]: RCFGBuilder took 595.08ms. Allocated memory was 77.6MB in the beginning and 94.4MB in the end (delta: 16.8MB). Free memory was 52.4MB in the beginning and 48.3MB in the end (delta: 4.1MB). Peak memory consumption was 31.7MB. Max. memory is 16.1GB.
[2022-12-13 09:10:45,703 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] #######################
--- Results ---
* Results from de.uni_freiburg.informatik.ultimate.core:
- StatisticsResult: Toolchain Benchmarks
Benchmark results are:
* CDTParser took 0.17ms. Allocated memory is still 77.6MB. Free memory is still 56.3MB. There was no memory consumed. Max. memory is 16.1GB.
* CACSL2BoogieTranslator took 308.74ms. Allocated memory is still 77.6MB. Free memory was 54.2MB in the beginning and 32.5MB in the end (delta: 21.6MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB.
* Boogie Procedure Inliner took 59.19ms. Allocated memory is still 77.6MB. Free memory was 32.5MB in the beginning and 54.9MB in the end (delta: -22.4MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB.
* Boogie Preprocessor took 34.18ms. Allocated memory is still 77.6MB. Free memory was 54.9MB in the beginning and 52.4MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB.
* RCFGBuilder took 595.08ms. Allocated memory was 77.6MB in the beginning and 94.4MB in the end (delta: 16.8MB). Free memory was 52.4MB in the beginning and 48.3MB in the end (delta: 4.1MB). Peak memory consumption was 31.7MB. Max. memory is 16.1GB.
* Results from de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder:
- ExceptionOrErrorResult: UnsupportedOperationException: Large block encoding incomplete: Is there illegal control flow (e.g. loops) within an atomic block?
de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: UnsupportedOperationException: Large block encoding incomplete: Is there illegal control flow (e.g. loops) within an atomic block?: de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder.createIcfg(CfgBuilder.java:303)
RESULT: Ultimate could not prove your program: Toolchain returned no result.
[2022-12-13 09:10:45,719 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3e748aa-8f38-4dd0-b396-7f9ace77dab4/bin/ugemcutter-rbreBovr8w/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0
Received shutdown request...
--- End real Ultimate output ---
Execution finished normally
Writing output log to file Ultimate.log
Result:
ERROR: ExceptionOrErrorResult: UnsupportedOperationException: Large block encoding incomplete: Is there illegal control flow (e.g. loops) within an atomic block?