./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-complex/safestack_relacy.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability 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_072225cc-5f5c-4588-990c-cca1431577cc/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_072225cc-5f5c-4588-990c-cca1431577cc/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_072225cc-5f5c-4588-990c-cca1431577cc/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_072225cc-5f5c-4588-990c-cca1431577cc/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-complex/safestack_relacy.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_072225cc-5f5c-4588-990c-cca1431577cc/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_072225cc-5f5c-4588-990c-cca1431577cc/bin/uautomizer-uyxdKDjOR8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1d61eb304445c3cb39dfadfa4748d680ea5f0f4958f8bc176e8bc3c77c47e674 --- 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 15:00:55,309 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 15:00:55,311 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 15:00:55,328 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 15:00:55,329 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 15:00:55,329 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 15:00:55,331 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 15:00:55,332 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 15:00:55,333 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 15:00:55,334 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 15:00:55,335 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 15:00:55,336 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 15:00:55,337 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 15:00:55,338 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 15:00:55,339 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 15:00:55,340 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 15:00:55,340 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 15:00:55,341 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 15:00:55,343 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 15:00:55,345 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 15:00:55,346 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 15:00:55,347 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 15:00:55,348 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 15:00:55,349 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 15:00:55,351 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 15:00:55,352 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 15:00:55,352 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 15:00:55,352 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 15:00:55,353 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 15:00:55,353 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 15:00:55,353 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 15:00:55,354 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 15:00:55,354 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 15:00:55,355 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 15:00:55,355 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 15:00:55,355 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 15:00:55,356 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 15:00:55,356 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 15:00:55,356 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 15:00:55,357 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 15:00:55,357 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 15:00:55,358 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_072225cc-5f5c-4588-990c-cca1431577cc/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 15:00:55,371 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 15:00:55,371 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 15:00:55,371 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 15:00:55,371 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 15:00:55,372 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 15:00:55,372 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 15:00:55,372 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 15:00:55,372 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 15:00:55,373 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 15:00:55,373 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 15:00:55,373 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 15:00:55,373 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 15:00:55,373 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 15:00:55,373 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 15:00:55,373 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 15:00:55,373 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 15:00:55,373 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 15:00:55,373 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 15:00:55,373 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 15:00:55,374 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 15:00:55,374 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 15:00:55,374 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 15:00:55,374 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 15:00:55,374 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 15:00:55,374 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 15:00:55,374 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 15:00:55,374 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 15:00:55,374 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 15:00:55,374 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 15:00:55,375 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 15:00:55,375 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 15:00:55,375 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 15:00:55,375 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 15:00:55,375 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 15:00:55,375 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 15:00:55,375 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_072225cc-5f5c-4588-990c-cca1431577cc/bin/uautomizer-uyxdKDjOR8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_072225cc-5f5c-4588-990c-cca1431577cc/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1d61eb304445c3cb39dfadfa4748d680ea5f0f4958f8bc176e8bc3c77c47e674 [2022-12-13 15:00:55,541 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 15:00:55,558 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 15:00:55,560 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 15:00:55,561 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 15:00:55,562 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 15:00:55,563 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_072225cc-5f5c-4588-990c-cca1431577cc/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/pthread-complex/safestack_relacy.i [2022-12-13 15:00:58,095 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 15:00:58,363 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 15:00:58,363 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_072225cc-5f5c-4588-990c-cca1431577cc/sv-benchmarks/c/pthread-complex/safestack_relacy.i [2022-12-13 15:00:58,380 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_072225cc-5f5c-4588-990c-cca1431577cc/bin/uautomizer-uyxdKDjOR8/data/1a7309f15/3cc62c0ef52b43c88b2a295041ba33a5/FLAG74564c714 [2022-12-13 15:00:58,392 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_072225cc-5f5c-4588-990c-cca1431577cc/bin/uautomizer-uyxdKDjOR8/data/1a7309f15/3cc62c0ef52b43c88b2a295041ba33a5 [2022-12-13 15:00:58,394 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 15:00:58,395 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 15:00:58,396 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 15:00:58,396 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 15:00:58,399 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 15:00:58,400 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 03:00:58" (1/1) ... [2022-12-13 15:00:58,400 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ac1aa5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:00:58, skipping insertion in model container [2022-12-13 15:00:58,401 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 03:00:58" (1/1) ... [2022-12-13 15:00:58,406 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 15:00:58,438 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 15:00:58,952 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:00:58,953 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:00:58,956 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:00:58,957 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:00:58,958 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:00:58,959 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:00:58,960 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:00:58,961 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:00:58,962 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:00:58,962 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:00:58,978 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_072225cc-5f5c-4588-990c-cca1431577cc/sv-benchmarks/c/pthread-complex/safestack_relacy.i[78860,78873] [2022-12-13 15:00:58,987 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 15:00:58,995 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 15:00:59,039 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:00:59,040 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:00:59,040 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:00:59,041 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:00:59,041 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:00:59,042 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:00:59,043 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:00:59,043 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:00:59,044 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:00:59,044 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:00:59,054 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_072225cc-5f5c-4588-990c-cca1431577cc/sv-benchmarks/c/pthread-complex/safestack_relacy.i[78860,78873] [2022-12-13 15:00:59,056 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 15:00:59,135 INFO L208 MainTranslator]: Completed translation [2022-12-13 15:00:59,136 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:00:59 WrapperNode [2022-12-13 15:00:59,136 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 15:00:59,137 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 15:00:59,137 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 15:00:59,137 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 15:00:59,142 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:00:59" (1/1) ... [2022-12-13 15:00:59,167 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:00:59" (1/1) ... [2022-12-13 15:00:59,205 INFO L138 Inliner]: procedures = 481, calls = 74, calls flagged for inlining = 19, calls inlined = 19, statements flattened = 283 [2022-12-13 15:00:59,206 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 15:00:59,206 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 15:00:59,207 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 15:00:59,207 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 15:00:59,214 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:00:59" (1/1) ... [2022-12-13 15:00:59,214 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:00:59" (1/1) ... [2022-12-13 15:00:59,220 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:00:59" (1/1) ... [2022-12-13 15:00:59,220 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:00:59" (1/1) ... [2022-12-13 15:00:59,234 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:00:59" (1/1) ... [2022-12-13 15:00:59,239 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:00:59" (1/1) ... [2022-12-13 15:00:59,243 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:00:59" (1/1) ... [2022-12-13 15:00:59,245 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:00:59" (1/1) ... [2022-12-13 15:00:59,251 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 15:00:59,252 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 15:00:59,252 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 15:00:59,252 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 15:00:59,253 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:00:59" (1/1) ... [2022-12-13 15:00:59,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 15:00:59,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_072225cc-5f5c-4588-990c-cca1431577cc/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:00:59,284 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_072225cc-5f5c-4588-990c-cca1431577cc/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 15:00:59,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_072225cc-5f5c-4588-990c-cca1431577cc/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 15:00:59,319 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-13 15:00:59,319 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 15:00:59,319 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-13 15:00:59,319 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 15:00:59,319 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 15:00:59,319 INFO L130 BoogieDeclarations]: Found specification of procedure thread [2022-12-13 15:00:59,319 INFO L138 BoogieDeclarations]: Found implementation of procedure thread [2022-12-13 15:00:59,320 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 15:00:59,320 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 15:00:59,320 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 15:00:59,320 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 15:00:59,320 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 15:00:59,322 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 15:00:59,560 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 15:00:59,562 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 15:00:59,834 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 15:00:59,877 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 15:00:59,877 INFO L300 CfgBuilder]: Removed 7 assume(true) statements. [2022-12-13 15:00:59,879 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 03:00:59 BoogieIcfgContainer [2022-12-13 15:00:59,879 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 15:00:59,881 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 15:00:59,881 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 15:00:59,883 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 15:00:59,883 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 03:00:58" (1/3) ... [2022-12-13 15:00:59,884 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33b590b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 03:00:59, skipping insertion in model container [2022-12-13 15:00:59,884 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:00:59" (2/3) ... [2022-12-13 15:00:59,884 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33b590b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 03:00:59, skipping insertion in model container [2022-12-13 15:00:59,884 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 03:00:59" (3/3) ... [2022-12-13 15:00:59,885 INFO L112 eAbstractionObserver]: Analyzing ICFG safestack_relacy.i [2022-12-13 15:00:59,891 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-12-13 15:00:59,898 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 15:00:59,898 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-13 15:00:59,898 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 15:00:59,959 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-12-13 15:00:59,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 269 places, 283 transitions, 574 flow [2022-12-13 15:01:00,065 INFO L130 PetriNetUnfolder]: 19/298 cut-off events. [2022-12-13 15:01:00,065 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 15:01:00,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 304 conditions, 298 events. 19/298 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 449 event pairs, 0 based on Foata normal form. 0/275 useless extension candidates. Maximal degree in co-relation 206. Up to 4 conditions per place. [2022-12-13 15:01:00,070 INFO L82 GeneralOperation]: Start removeDead. Operand has 269 places, 283 transitions, 574 flow [2022-12-13 15:01:00,074 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 265 places, 278 transitions, 561 flow [2022-12-13 15:01:00,077 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 15:01:00,085 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 265 places, 278 transitions, 561 flow [2022-12-13 15:01:00,087 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 265 places, 278 transitions, 561 flow [2022-12-13 15:01:00,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 265 places, 278 transitions, 561 flow [2022-12-13 15:01:00,128 INFO L130 PetriNetUnfolder]: 18/293 cut-off events. [2022-12-13 15:01:00,128 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 15:01:00,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 298 conditions, 293 events. 18/293 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 407 event pairs, 0 based on Foata normal form. 0/270 useless extension candidates. Maximal degree in co-relation 206. Up to 4 conditions per place. [2022-12-13 15:01:00,132 INFO L119 LiptonReduction]: Number of co-enabled transitions 7812 [2022-12-13 15:01:06,410 INFO L134 LiptonReduction]: Checked pairs total: 7419 [2022-12-13 15:01:06,410 INFO L136 LiptonReduction]: Total number of compositions: 276 [2022-12-13 15:01:06,421 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 15:01:06,428 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@1de77b4c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 15:01:06,428 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-12-13 15:01:06,431 INFO L130 PetriNetUnfolder]: 1/16 cut-off events. [2022-12-13 15:01:06,431 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 15:01:06,431 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:01:06,431 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2022-12-13 15:01:06,432 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:01:06,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:01:06,435 INFO L85 PathProgramCache]: Analyzing trace with hash -368233502, now seen corresponding path program 1 times [2022-12-13 15:01:06,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:01:06,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824830685] [2022-12-13 15:01:06,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:01:06,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:01:06,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:01:06,688 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 15:01:06,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:01:06,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824830685] [2022-12-13 15:01:06,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824830685] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:01:06,689 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:01:06,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 15:01:06,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234879841] [2022-12-13 15:01:06,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:01:06,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:01:06,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:01:06,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:01:06,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 15:01:06,730 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 260 out of 559 [2022-12-13 15:01:06,733 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 37 transitions, 79 flow. Second operand has 3 states, 3 states have (on average 261.6666666666667) internal successors, (785), 3 states have internal predecessors, (785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:01:06,733 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:01:06,733 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 260 of 559 [2022-12-13 15:01:06,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:01:06,828 INFO L130 PetriNetUnfolder]: 82/168 cut-off events. [2022-12-13 15:01:06,828 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 15:01:06,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 341 conditions, 168 events. 82/168 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 453 event pairs, 57 based on Foata normal form. 0/118 useless extension candidates. Maximal degree in co-relation 320. Up to 167 conditions per place. [2022-12-13 15:01:06,830 INFO L137 encePairwiseOnDemand]: 552/559 looper letters, 31 selfloop transitions, 2 changer transitions 0/34 dead transitions. [2022-12-13 15:01:06,830 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 34 transitions, 139 flow [2022-12-13 15:01:06,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:01:06,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 15:01:06,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 818 transitions. [2022-12-13 15:01:06,843 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4877757901013715 [2022-12-13 15:01:06,843 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 818 transitions. [2022-12-13 15:01:06,844 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 818 transitions. [2022-12-13 15:01:06,845 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:01:06,847 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 818 transitions. [2022-12-13 15:01:06,852 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 272.6666666666667) internal successors, (818), 3 states have internal predecessors, (818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:01:06,860 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 559.0) internal successors, (2236), 4 states have internal predecessors, (2236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:01:06,861 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 559.0) internal successors, (2236), 4 states have internal predecessors, (2236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:01:06,863 INFO L175 Difference]: Start difference. First operand has 30 places, 37 transitions, 79 flow. Second operand 3 states and 818 transitions. [2022-12-13 15:01:06,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 34 transitions, 139 flow [2022-12-13 15:01:06,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 34 transitions, 139 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 15:01:06,868 INFO L231 Difference]: Finished difference. Result has 32 places, 34 transitions, 83 flow [2022-12-13 15:01:06,870 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=559, PETRI_DIFFERENCE_MINUEND_FLOW=71, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=83, PETRI_PLACES=32, PETRI_TRANSITIONS=34} [2022-12-13 15:01:06,873 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 2 predicate places. [2022-12-13 15:01:06,873 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 34 transitions, 83 flow [2022-12-13 15:01:06,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 261.6666666666667) internal successors, (785), 3 states have internal predecessors, (785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:01:06,874 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:01:06,874 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2022-12-13 15:01:06,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 15:01:06,875 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:01:06,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:01:06,875 INFO L85 PathProgramCache]: Analyzing trace with hash -1017756051, now seen corresponding path program 1 times [2022-12-13 15:01:06,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:01:06,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370323916] [2022-12-13 15:01:06,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:01:06,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:01:06,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:01:06,992 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 15:01:06,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:01:06,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370323916] [2022-12-13 15:01:06,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370323916] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:01:06,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936865533] [2022-12-13 15:01:06,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:01:06,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:01:06,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_072225cc-5f5c-4588-990c-cca1431577cc/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:01:06,994 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_072225cc-5f5c-4588-990c-cca1431577cc/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:01:06,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_072225cc-5f5c-4588-990c-cca1431577cc/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 15:01:07,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:01:07,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-13 15:01:07,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:01:07,135 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 15:01:07,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:01:07,150 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 15:01:07,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936865533] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:01:07,150 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:01:07,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-12-13 15:01:07,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151027827] [2022-12-13 15:01:07,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:01:07,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 15:01:07,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:01:07,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 15:01:07,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2022-12-13 15:01:07,194 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 258 out of 559 [2022-12-13 15:01:07,196 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 34 transitions, 83 flow. Second operand has 7 states, 7 states have (on average 259.57142857142856) internal successors, (1817), 7 states have internal predecessors, (1817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:01:07,196 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:01:07,196 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 258 of 559 [2022-12-13 15:01:07,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:01:07,301 INFO L130 PetriNetUnfolder]: 82/169 cut-off events. [2022-12-13 15:01:07,301 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 15:01:07,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 351 conditions, 169 events. 82/169 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 453 event pairs, 57 based on Foata normal form. 0/119 useless extension candidates. Maximal degree in co-relation 339. Up to 167 conditions per place. [2022-12-13 15:01:07,303 INFO L137 encePairwiseOnDemand]: 556/559 looper letters, 31 selfloop transitions, 3 changer transitions 0/35 dead transitions. [2022-12-13 15:01:07,303 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 35 transitions, 155 flow [2022-12-13 15:01:07,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 15:01:07,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 15:01:07,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1067 transitions. [2022-12-13 15:01:07,307 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47719141323792486 [2022-12-13 15:01:07,307 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1067 transitions. [2022-12-13 15:01:07,307 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1067 transitions. [2022-12-13 15:01:07,308 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:01:07,308 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1067 transitions. [2022-12-13 15:01:07,309 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 266.75) internal successors, (1067), 4 states have internal predecessors, (1067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:01:07,312 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 559.0) internal successors, (2795), 5 states have internal predecessors, (2795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:01:07,313 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 559.0) internal successors, (2795), 5 states have internal predecessors, (2795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:01:07,313 INFO L175 Difference]: Start difference. First operand has 32 places, 34 transitions, 83 flow. Second operand 4 states and 1067 transitions. [2022-12-13 15:01:07,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 35 transitions, 155 flow [2022-12-13 15:01:07,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 35 transitions, 151 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-12-13 15:01:07,314 INFO L231 Difference]: Finished difference. Result has 35 places, 35 transitions, 95 flow [2022-12-13 15:01:07,314 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=559, PETRI_DIFFERENCE_MINUEND_FLOW=79, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=95, PETRI_PLACES=35, PETRI_TRANSITIONS=35} [2022-12-13 15:01:07,315 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 5 predicate places. [2022-12-13 15:01:07,315 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 35 transitions, 95 flow [2022-12-13 15:01:07,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 259.57142857142856) internal successors, (1817), 7 states have internal predecessors, (1817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:01:07,315 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:01:07,315 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2022-12-13 15:01:07,322 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_072225cc-5f5c-4588-990c-cca1431577cc/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 15:01:07,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_072225cc-5f5c-4588-990c-cca1431577cc/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:01:07,516 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:01:07,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:01:07,517 INFO L85 PathProgramCache]: Analyzing trace with hash 321881410, now seen corresponding path program 2 times [2022-12-13 15:01:07,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:01:07,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352625477] [2022-12-13 15:01:07,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:01:07,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:01:07,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 15:01:07,547 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 15:01:07,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 15:01:07,584 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 15:01:07,585 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 15:01:07,586 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2022-12-13 15:01:07,587 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2022-12-13 15:01:07,588 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2022-12-13 15:01:07,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 15:01:07,588 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1] [2022-12-13 15:01:07,591 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 15:01:07,591 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-12-13 15:01:07,644 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-13 15:01:07,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 446 places, 471 transitions, 960 flow [2022-12-13 15:01:07,737 INFO L130 PetriNetUnfolder]: 36/524 cut-off events. [2022-12-13 15:01:07,737 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-12-13 15:01:07,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 538 conditions, 524 events. 36/524 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1633 event pairs, 0 based on Foata normal form. 0/482 useless extension candidates. Maximal degree in co-relation 406. Up to 8 conditions per place. [2022-12-13 15:01:07,741 INFO L82 GeneralOperation]: Start removeDead. Operand has 446 places, 471 transitions, 960 flow [2022-12-13 15:01:07,743 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 446 places, 471 transitions, 960 flow [2022-12-13 15:01:07,744 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 15:01:07,744 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 446 places, 471 transitions, 960 flow [2022-12-13 15:01:07,744 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 446 places, 471 transitions, 960 flow [2022-12-13 15:01:07,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 446 places, 471 transitions, 960 flow [2022-12-13 15:01:07,817 INFO L130 PetriNetUnfolder]: 36/524 cut-off events. [2022-12-13 15:01:07,818 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-12-13 15:01:07,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 538 conditions, 524 events. 36/524 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1633 event pairs, 0 based on Foata normal form. 0/482 useless extension candidates. Maximal degree in co-relation 406. Up to 8 conditions per place. [2022-12-13 15:01:07,844 INFO L119 LiptonReduction]: Number of co-enabled transitions 88908 [2022-12-13 15:01:16,231 INFO L134 LiptonReduction]: Checked pairs total: 90306 [2022-12-13 15:01:16,231 INFO L136 LiptonReduction]: Total number of compositions: 450 [2022-12-13 15:01:16,232 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 15:01:16,233 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@1de77b4c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 15:01:16,233 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-12-13 15:01:16,236 INFO L130 PetriNetUnfolder]: 1/20 cut-off events. [2022-12-13 15:01:16,236 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 15:01:16,236 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:01:16,236 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:01:16,237 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting threadErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-12-13 15:01:16,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:01:16,237 INFO L85 PathProgramCache]: Analyzing trace with hash -1883266129, now seen corresponding path program 1 times [2022-12-13 15:01:16,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:01:16,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640905361] [2022-12-13 15:01:16,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:01:16,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:01:16,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:01:16,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:01:16,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:01:16,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640905361] [2022-12-13 15:01:16,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640905361] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:01:16,314 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:01:16,314 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 15:01:16,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574928453] [2022-12-13 15:01:16,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:01:16,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:01:16,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:01:16,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:01:16,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 15:01:16,328 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 433 out of 921 [2022-12-13 15:01:16,329 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 80 transitions, 178 flow. Second operand has 3 states, 3 states have (on average 435.6666666666667) internal successors, (1307), 3 states have internal predecessors, (1307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:01:16,329 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:01:16,329 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 433 of 921 [2022-12-13 15:01:16,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:01:17,443 INFO L130 PetriNetUnfolder]: 8425/12342 cut-off events. [2022-12-13 15:01:17,443 INFO L131 PetriNetUnfolder]: For 207/207 co-relation queries the response was YES. [2022-12-13 15:01:17,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24788 conditions, 12342 events. 8425/12342 cut-off events. For 207/207 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 66139 event pairs, 6567 based on Foata normal form. 0/8929 useless extension candidates. Maximal degree in co-relation 20012. Up to 12304 conditions per place. [2022-12-13 15:01:17,484 INFO L137 encePairwiseOnDemand]: 913/921 looper letters, 71 selfloop transitions, 2 changer transitions 0/76 dead transitions. [2022-12-13 15:01:17,484 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 76 transitions, 316 flow [2022-12-13 15:01:17,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:01:17,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 15:01:17,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1378 transitions. [2022-12-13 15:01:17,487 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49873326094824466 [2022-12-13 15:01:17,487 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1378 transitions. [2022-12-13 15:01:17,487 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1378 transitions. [2022-12-13 15:01:17,488 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:01:17,488 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1378 transitions. [2022-12-13 15:01:17,489 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 459.3333333333333) internal successors, (1378), 3 states have internal predecessors, (1378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:01:17,492 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 921.0) internal successors, (3684), 4 states have internal predecessors, (3684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:01:17,493 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 921.0) internal successors, (3684), 4 states have internal predecessors, (3684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:01:17,493 INFO L175 Difference]: Start difference. First operand has 65 places, 80 transitions, 178 flow. Second operand 3 states and 1378 transitions. [2022-12-13 15:01:17,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 76 transitions, 316 flow [2022-12-13 15:01:17,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 76 transitions, 316 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 15:01:17,495 INFO L231 Difference]: Finished difference. Result has 68 places, 76 transitions, 180 flow [2022-12-13 15:01:17,495 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=921, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=180, PETRI_PLACES=68, PETRI_TRANSITIONS=76} [2022-12-13 15:01:17,496 INFO L288 CegarLoopForPetriNet]: 65 programPoint places, 3 predicate places. [2022-12-13 15:01:17,496 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 76 transitions, 180 flow [2022-12-13 15:01:17,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 435.6666666666667) internal successors, (1307), 3 states have internal predecessors, (1307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:01:17,496 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:01:17,497 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:01:17,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 15:01:17,497 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting threadErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-12-13 15:01:17,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:01:17,497 INFO L85 PathProgramCache]: Analyzing trace with hash 37769878, now seen corresponding path program 1 times [2022-12-13 15:01:17,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:01:17,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55666996] [2022-12-13 15:01:17,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:01:17,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:01:17,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:01:17,612 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 15:01:17,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:01:17,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55666996] [2022-12-13 15:01:17,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55666996] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:01:17,613 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:01:17,613 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 15:01:17,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188199231] [2022-12-13 15:01:17,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:01:17,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:01:17,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:01:17,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:01:17,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 15:01:17,715 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 425 out of 921 [2022-12-13 15:01:17,717 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 76 transitions, 180 flow. Second operand has 3 states, 3 states have (on average 428.6666666666667) internal successors, (1286), 3 states have internal predecessors, (1286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:01:17,717 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:01:17,717 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 425 of 921 [2022-12-13 15:01:17,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:01:18,882 INFO L130 PetriNetUnfolder]: 10222/15054 cut-off events. [2022-12-13 15:01:18,882 INFO L131 PetriNetUnfolder]: For 231/231 co-relation queries the response was YES. [2022-12-13 15:01:18,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30248 conditions, 15054 events. 10222/15054 cut-off events. For 231/231 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 86598 event pairs, 5709 based on Foata normal form. 0/11096 useless extension candidates. Maximal degree in co-relation 30235. Up to 12497 conditions per place. [2022-12-13 15:01:18,924 INFO L137 encePairwiseOnDemand]: 910/921 looper letters, 104 selfloop transitions, 10 changer transitions 2/119 dead transitions. [2022-12-13 15:01:18,924 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 119 transitions, 506 flow [2022-12-13 15:01:18,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:01:18,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 15:01:18,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1391 transitions. [2022-12-13 15:01:18,927 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5034382917119073 [2022-12-13 15:01:18,927 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1391 transitions. [2022-12-13 15:01:18,927 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1391 transitions. [2022-12-13 15:01:18,928 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:01:18,928 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1391 transitions. [2022-12-13 15:01:18,929 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 463.6666666666667) internal successors, (1391), 3 states have internal predecessors, (1391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:01:18,932 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 921.0) internal successors, (3684), 4 states have internal predecessors, (3684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:01:18,933 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 921.0) internal successors, (3684), 4 states have internal predecessors, (3684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:01:18,933 INFO L175 Difference]: Start difference. First operand has 68 places, 76 transitions, 180 flow. Second operand 3 states and 1391 transitions. [2022-12-13 15:01:18,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 119 transitions, 506 flow [2022-12-13 15:01:18,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 119 transitions, 502 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-12-13 15:01:18,936 INFO L231 Difference]: Finished difference. Result has 71 places, 85 transitions, 254 flow [2022-12-13 15:01:18,936 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=921, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=254, PETRI_PLACES=71, PETRI_TRANSITIONS=85} [2022-12-13 15:01:18,936 INFO L288 CegarLoopForPetriNet]: 65 programPoint places, 6 predicate places. [2022-12-13 15:01:18,936 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 85 transitions, 254 flow [2022-12-13 15:01:18,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 428.6666666666667) internal successors, (1286), 3 states have internal predecessors, (1286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:01:18,937 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:01:18,937 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2022-12-13 15:01:18,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-13 15:01:18,938 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-12-13 15:01:18,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:01:18,938 INFO L85 PathProgramCache]: Analyzing trace with hash 1841570711, now seen corresponding path program 1 times [2022-12-13 15:01:18,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:01:18,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558659401] [2022-12-13 15:01:18,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:01:18,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:01:18,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:01:19,017 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-13 15:01:19,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:01:19,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558659401] [2022-12-13 15:01:19,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558659401] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:01:19,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352840909] [2022-12-13 15:01:19,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:01:19,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:01:19,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_072225cc-5f5c-4588-990c-cca1431577cc/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:01:19,019 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_072225cc-5f5c-4588-990c-cca1431577cc/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:01:19,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_072225cc-5f5c-4588-990c-cca1431577cc/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 15:01:19,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:01:19,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-13 15:01:19,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:01:19,143 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-13 15:01:19,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:01:19,159 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-13 15:01:19,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352840909] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:01:19,160 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:01:19,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2022-12-13 15:01:19,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7347534] [2022-12-13 15:01:19,160 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:01:19,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 15:01:19,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:01:19,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 15:01:19,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2022-12-13 15:01:19,206 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 431 out of 921 [2022-12-13 15:01:19,208 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 85 transitions, 254 flow. Second operand has 8 states, 8 states have (on average 432.625) internal successors, (3461), 8 states have internal predecessors, (3461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:01:19,209 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:01:19,209 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 431 of 921 [2022-12-13 15:01:19,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:01:20,534 INFO L130 PetriNetUnfolder]: 10222/15067 cut-off events. [2022-12-13 15:01:20,534 INFO L131 PetriNetUnfolder]: For 2730/2730 co-relation queries the response was YES. [2022-12-13 15:01:20,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33910 conditions, 15067 events. 10222/15067 cut-off events. For 2730/2730 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 85467 event pairs, 7559 based on Foata normal form. 0/12369 useless extension candidates. Maximal degree in co-relation 33889. Up to 14997 conditions per place. [2022-12-13 15:01:20,578 INFO L137 encePairwiseOnDemand]: 918/921 looper letters, 80 selfloop transitions, 3 changer transitions 0/86 dead transitions. [2022-12-13 15:01:20,578 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 86 transitions, 424 flow [2022-12-13 15:01:20,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 15:01:20,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 15:01:20,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1799 transitions. [2022-12-13 15:01:20,580 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48832790445168295 [2022-12-13 15:01:20,581 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1799 transitions. [2022-12-13 15:01:20,581 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1799 transitions. [2022-12-13 15:01:20,581 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:01:20,581 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1799 transitions. [2022-12-13 15:01:20,583 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 449.75) internal successors, (1799), 4 states have internal predecessors, (1799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:01:20,586 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 921.0) internal successors, (4605), 5 states have internal predecessors, (4605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:01:20,588 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 921.0) internal successors, (4605), 5 states have internal predecessors, (4605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:01:20,588 INFO L175 Difference]: Start difference. First operand has 71 places, 85 transitions, 254 flow. Second operand 4 states and 1799 transitions. [2022-12-13 15:01:20,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 86 transitions, 424 flow [2022-12-13 15:01:20,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 86 transitions, 404 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 15:01:20,607 INFO L231 Difference]: Finished difference. Result has 73 places, 86 transitions, 250 flow [2022-12-13 15:01:20,607 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=921, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=250, PETRI_PLACES=73, PETRI_TRANSITIONS=86} [2022-12-13 15:01:20,607 INFO L288 CegarLoopForPetriNet]: 65 programPoint places, 8 predicate places. [2022-12-13 15:01:20,608 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 86 transitions, 250 flow [2022-12-13 15:01:20,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 432.625) internal successors, (3461), 8 states have internal predecessors, (3461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:01:20,609 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:01:20,609 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1] [2022-12-13 15:01:20,613 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_072225cc-5f5c-4588-990c-cca1431577cc/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 15:01:20,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_072225cc-5f5c-4588-990c-cca1431577cc/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-12-13 15:01:20,810 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-12-13 15:01:20,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:01:20,812 INFO L85 PathProgramCache]: Analyzing trace with hash 1063027637, now seen corresponding path program 2 times [2022-12-13 15:01:20,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:01:20,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550726531] [2022-12-13 15:01:20,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:01:20,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:01:20,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 15:01:20,840 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 15:01:20,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 15:01:20,858 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 15:01:20,858 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 15:01:20,859 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2022-12-13 15:01:20,859 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2022-12-13 15:01:20,859 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2022-12-13 15:01:20,859 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-12-13 15:01:20,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-13 15:01:20,859 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1] [2022-12-13 15:01:20,860 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 15:01:20,860 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-12-13 15:01:20,915 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-12-13 15:01:20,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 623 places, 659 transitions, 1348 flow [2022-12-13 15:01:21,079 INFO L130 PetriNetUnfolder]: 58/779 cut-off events. [2022-12-13 15:01:21,079 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-12-13 15:01:21,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 807 conditions, 779 events. 58/779 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 3292 event pairs, 1 based on Foata normal form. 0/714 useless extension candidates. Maximal degree in co-relation 622. Up to 16 conditions per place. [2022-12-13 15:01:21,087 INFO L82 GeneralOperation]: Start removeDead. Operand has 623 places, 659 transitions, 1348 flow [2022-12-13 15:01:21,091 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 623 places, 659 transitions, 1348 flow [2022-12-13 15:01:21,091 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 15:01:21,092 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 623 places, 659 transitions, 1348 flow [2022-12-13 15:01:21,092 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 623 places, 659 transitions, 1348 flow [2022-12-13 15:01:21,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 623 places, 659 transitions, 1348 flow [2022-12-13 15:01:21,235 INFO L130 PetriNetUnfolder]: 58/779 cut-off events. [2022-12-13 15:01:21,235 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-12-13 15:01:21,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 807 conditions, 779 events. 58/779 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 3292 event pairs, 1 based on Foata normal form. 0/714 useless extension candidates. Maximal degree in co-relation 622. Up to 16 conditions per place. [2022-12-13 15:01:21,295 INFO L119 LiptonReduction]: Number of co-enabled transitions 238824 [2022-12-13 15:01:32,992 INFO L134 LiptonReduction]: Checked pairs total: 248042 [2022-12-13 15:01:32,992 INFO L136 LiptonReduction]: Total number of compositions: 632 [2022-12-13 15:01:32,994 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 15:01:32,994 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@1de77b4c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 15:01:32,994 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-12-13 15:01:32,997 INFO L130 PetriNetUnfolder]: 1/20 cut-off events. [2022-12-13 15:01:32,997 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 15:01:32,997 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:01:32,998 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:01:32,998 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting threadErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-12-13 15:01:32,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:01:32,998 INFO L85 PathProgramCache]: Analyzing trace with hash -1542125795, now seen corresponding path program 1 times [2022-12-13 15:01:32,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:01:32,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824887914] [2022-12-13 15:01:32,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:01:32,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:01:33,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:01:33,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:01:33,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:01:33,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824887914] [2022-12-13 15:01:33,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824887914] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:01:33,059 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:01:33,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 15:01:33,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996286357] [2022-12-13 15:01:33,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:01:33,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:01:33,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:01:33,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:01:33,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 15:01:33,077 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 606 out of 1291 [2022-12-13 15:01:33,079 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 117 transitions, 264 flow. Second operand has 3 states, 3 states have (on average 608.6666666666666) internal successors, (1826), 3 states have internal predecessors, (1826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:01:33,079 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:01:33,079 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 606 of 1291 [2022-12-13 15:01:33,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:02:03,975 INFO L130 PetriNetUnfolder]: 345555/449883 cut-off events. [2022-12-13 15:02:03,975 INFO L131 PetriNetUnfolder]: For 9624/9624 co-relation queries the response was YES. [2022-12-13 15:02:04,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 903766 conditions, 449883 events. 345555/449883 cut-off events. For 9624/9624 co-relation queries the response was YES. Maximal size of possible extension queue 7611. Compared 2823370 event pairs, 272761 based on Foata normal form. 0/331924 useless extension candidates. Maximal degree in co-relation 196232. Up to 449063 conditions per place. [2022-12-13 15:02:05,851 INFO L137 encePairwiseOnDemand]: 1280/1291 looper letters, 104 selfloop transitions, 2 changer transitions 0/109 dead transitions. [2022-12-13 15:02:05,851 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 109 transitions, 460 flow [2022-12-13 15:02:05,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:02:05,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 15:02:05,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1933 transitions. [2022-12-13 15:02:05,855 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4990963077717532 [2022-12-13 15:02:05,855 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1933 transitions. [2022-12-13 15:02:05,855 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1933 transitions. [2022-12-13 15:02:05,856 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:02:05,856 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1933 transitions. [2022-12-13 15:02:05,859 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 644.3333333333334) internal successors, (1933), 3 states have internal predecessors, (1933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:02:05,863 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1291.0) internal successors, (5164), 4 states have internal predecessors, (5164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:02:05,864 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1291.0) internal successors, (5164), 4 states have internal predecessors, (5164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:02:05,864 INFO L175 Difference]: Start difference. First operand has 94 places, 117 transitions, 264 flow. Second operand 3 states and 1933 transitions. [2022-12-13 15:02:05,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 109 transitions, 460 flow [2022-12-13 15:02:05,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 109 transitions, 460 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 15:02:05,869 INFO L231 Difference]: Finished difference. Result has 96 places, 109 transitions, 258 flow [2022-12-13 15:02:05,870 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1291, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=258, PETRI_PLACES=96, PETRI_TRANSITIONS=109} [2022-12-13 15:02:05,870 INFO L288 CegarLoopForPetriNet]: 94 programPoint places, 2 predicate places. [2022-12-13 15:02:05,870 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 109 transitions, 258 flow [2022-12-13 15:02:05,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 608.6666666666666) internal successors, (1826), 3 states have internal predecessors, (1826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:02:05,871 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:02:05,871 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:02:05,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-13 15:02:05,871 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting threadErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-12-13 15:02:05,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:02:05,871 INFO L85 PathProgramCache]: Analyzing trace with hash -177060163, now seen corresponding path program 1 times [2022-12-13 15:02:05,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:02:05,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123462404] [2022-12-13 15:02:05,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:02:05,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:02:05,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:02:05,927 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 15:02:05,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:02:05,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123462404] [2022-12-13 15:02:05,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123462404] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:02:05,928 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:02:05,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 15:02:05,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131171484] [2022-12-13 15:02:05,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:02:05,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:02:05,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:02:05,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:02:05,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 15:02:06,034 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 596 out of 1291 [2022-12-13 15:02:06,035 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 109 transitions, 258 flow. Second operand has 3 states, 3 states have (on average 599.6666666666666) internal successors, (1799), 3 states have internal predecessors, (1799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:02:06,036 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:02:06,036 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 596 of 1291 [2022-12-13 15:02:06,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:02:41,463 INFO L130 PetriNetUnfolder]: 422124/550682 cut-off events. [2022-12-13 15:02:41,463 INFO L131 PetriNetUnfolder]: For 11405/11405 co-relation queries the response was YES. [2022-12-13 15:02:42,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1106298 conditions, 550682 events. 422124/550682 cut-off events. For 11405/11405 co-relation queries the response was YES. Maximal size of possible extension queue 9598. Compared 3605543 event pairs, 247400 based on Foata normal form. 0/411706 useless extension candidates. Maximal degree in co-relation 1106284. Up to 464785 conditions per place. [2022-12-13 15:02:43,809 INFO L137 encePairwiseOnDemand]: 1269/1291 looper letters, 161 selfloop transitions, 21 changer transitions 0/185 dead transitions. [2022-12-13 15:02:43,809 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 185 transitions, 792 flow [2022-12-13 15:02:43,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:02:43,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 15:02:43,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1970 transitions. [2022-12-13 15:02:43,813 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5086496256132197 [2022-12-13 15:02:43,813 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1970 transitions. [2022-12-13 15:02:43,813 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1970 transitions. [2022-12-13 15:02:43,814 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:02:43,814 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1970 transitions. [2022-12-13 15:02:43,817 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 656.6666666666666) internal successors, (1970), 3 states have internal predecessors, (1970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:02:43,821 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1291.0) internal successors, (5164), 4 states have internal predecessors, (5164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:02:43,822 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1291.0) internal successors, (5164), 4 states have internal predecessors, (5164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:02:43,822 INFO L175 Difference]: Start difference. First operand has 96 places, 109 transitions, 258 flow. Second operand 3 states and 1970 transitions. [2022-12-13 15:02:43,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 185 transitions, 792 flow [2022-12-13 15:02:43,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 185 transitions, 788 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-12-13 15:02:43,828 INFO L231 Difference]: Finished difference. Result has 99 places, 129 transitions, 420 flow [2022-12-13 15:02:43,828 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1291, PETRI_DIFFERENCE_MINUEND_FLOW=254, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=420, PETRI_PLACES=99, PETRI_TRANSITIONS=129} [2022-12-13 15:02:43,829 INFO L288 CegarLoopForPetriNet]: 94 programPoint places, 5 predicate places. [2022-12-13 15:02:43,829 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 129 transitions, 420 flow [2022-12-13 15:02:43,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 599.6666666666666) internal successors, (1799), 3 states have internal predecessors, (1799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:02:43,830 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:02:43,830 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:02:43,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-13 15:02:43,830 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting threadErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-12-13 15:02:43,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:02:43,831 INFO L85 PathProgramCache]: Analyzing trace with hash -1320515309, now seen corresponding path program 1 times [2022-12-13 15:02:43,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:02:43,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322235750] [2022-12-13 15:02:43,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:02:43,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:02:43,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:02:43,896 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 15:02:43,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:02:43,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322235750] [2022-12-13 15:02:43,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322235750] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:02:43,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043621866] [2022-12-13 15:02:43,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:02:43,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:02:43,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_072225cc-5f5c-4588-990c-cca1431577cc/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:02:43,897 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_072225cc-5f5c-4588-990c-cca1431577cc/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:02:43,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_072225cc-5f5c-4588-990c-cca1431577cc/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 15:02:44,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:02:44,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-13 15:02:44,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:02:44,041 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 15:02:44,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:02:44,057 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 15:02:44,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043621866] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:02:44,057 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:02:44,057 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2022-12-13 15:02:44,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451198913] [2022-12-13 15:02:44,057 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:02:44,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 15:02:44,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:02:44,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 15:02:44,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2022-12-13 15:02:44,089 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 604 out of 1291 [2022-12-13 15:02:44,092 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 129 transitions, 420 flow. Second operand has 8 states, 8 states have (on average 606.25) internal successors, (4850), 8 states have internal predecessors, (4850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:02:44,092 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:02:44,092 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 604 of 1291 [2022-12-13 15:02:44,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:03:21,599 INFO L130 PetriNetUnfolder]: 422124/551096 cut-off events. [2022-12-13 15:03:21,599 INFO L131 PetriNetUnfolder]: For 102086/102086 co-relation queries the response was YES. [2022-12-13 15:03:22,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1267563 conditions, 551096 events. 422124/551096 cut-off events. For 102086/102086 co-relation queries the response was YES. Maximal size of possible extension queue 9686. Compared 3590106 event pairs, 311772 based on Foata normal form. 0/450205 useless extension candidates. Maximal degree in co-relation 1267541. Up to 549814 conditions per place. [2022-12-13 15:03:24,014 INFO L137 encePairwiseOnDemand]: 1288/1291 looper letters, 124 selfloop transitions, 3 changer transitions 0/130 dead transitions. [2022-12-13 15:03:24,014 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 130 transitions, 678 flow [2022-12-13 15:03:24,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 15:03:24,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 15:03:24,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 2524 transitions. [2022-12-13 15:03:24,020 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48876839659178933 [2022-12-13 15:03:24,020 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 2524 transitions. [2022-12-13 15:03:24,020 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 2524 transitions. [2022-12-13 15:03:24,021 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:03:24,021 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 2524 transitions. [2022-12-13 15:03:24,025 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 631.0) internal successors, (2524), 4 states have internal predecessors, (2524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:03:24,029 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1291.0) internal successors, (6455), 5 states have internal predecessors, (6455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:03:24,030 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1291.0) internal successors, (6455), 5 states have internal predecessors, (6455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:03:24,031 INFO L175 Difference]: Start difference. First operand has 99 places, 129 transitions, 420 flow. Second operand 4 states and 2524 transitions. [2022-12-13 15:03:24,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 130 transitions, 678 flow [2022-12-13 15:03:37,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 130 transitions, 636 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 15:03:37,931 INFO L231 Difference]: Finished difference. Result has 101 places, 130 transitions, 394 flow [2022-12-13 15:03:37,932 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1291, PETRI_DIFFERENCE_MINUEND_FLOW=378, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=394, PETRI_PLACES=101, PETRI_TRANSITIONS=130} [2022-12-13 15:03:37,932 INFO L288 CegarLoopForPetriNet]: 94 programPoint places, 7 predicate places. [2022-12-13 15:03:37,932 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 130 transitions, 394 flow [2022-12-13 15:03:37,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 606.25) internal successors, (4850), 8 states have internal predecessors, (4850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:03:37,933 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:03:37,933 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:03:37,938 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_072225cc-5f5c-4588-990c-cca1431577cc/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 15:03:38,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_072225cc-5f5c-4588-990c-cca1431577cc/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-13 15:03:38,135 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting threadErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-12-13 15:03:38,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:03:38,136 INFO L85 PathProgramCache]: Analyzing trace with hash 1150612389, now seen corresponding path program 2 times [2022-12-13 15:03:38,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:03:38,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206430745] [2022-12-13 15:03:38,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:03:38,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:03:38,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:03:38,198 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 15:03:38,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:03:38,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206430745] [2022-12-13 15:03:38,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206430745] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:03:38,198 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:03:38,198 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 15:03:38,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669337516] [2022-12-13 15:03:38,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:03:38,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:03:38,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:03:38,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:03:38,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 15:03:38,204 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 609 out of 1291 [2022-12-13 15:03:38,206 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 130 transitions, 394 flow. Second operand has 3 states, 3 states have (on average 613.3333333333334) internal successors, (1840), 3 states have internal predecessors, (1840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:03:38,206 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:03:38,206 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 609 of 1291 [2022-12-13 15:03:38,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:04:19,967 INFO L130 PetriNetUnfolder]: 434888/567512 cut-off events. [2022-12-13 15:04:19,967 INFO L131 PetriNetUnfolder]: For 58728/58728 co-relation queries the response was YES. [2022-12-13 15:04:20,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1272111 conditions, 567512 events. 434888/567512 cut-off events. For 58728/58728 co-relation queries the response was YES. Maximal size of possible extension queue 7627. Compared 3634735 event pairs, 311772 based on Foata normal form. 4032/464081 useless extension candidates. Maximal degree in co-relation 1272090. Up to 549816 conditions per place. [2022-12-13 15:04:22,541 INFO L137 encePairwiseOnDemand]: 1288/1291 looper letters, 196 selfloop transitions, 2 changer transitions 0/201 dead transitions. [2022-12-13 15:04:22,541 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 201 transitions, 986 flow [2022-12-13 15:04:22,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:04:22,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 15:04:22,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2004 transitions. [2022-12-13 15:04:22,545 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.517428350116189 [2022-12-13 15:04:22,545 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2004 transitions. [2022-12-13 15:04:22,545 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2004 transitions. [2022-12-13 15:04:22,546 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:04:22,546 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2004 transitions. [2022-12-13 15:04:22,549 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 668.0) internal successors, (2004), 3 states have internal predecessors, (2004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:04:22,552 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1291.0) internal successors, (5164), 4 states have internal predecessors, (5164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:04:22,553 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1291.0) internal successors, (5164), 4 states have internal predecessors, (5164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:04:22,553 INFO L175 Difference]: Start difference. First operand has 101 places, 130 transitions, 394 flow. Second operand 3 states and 2004 transitions. [2022-12-13 15:04:22,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 201 transitions, 986 flow [2022-12-13 15:04:22,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 201 transitions, 978 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-12-13 15:04:22,563 INFO L231 Difference]: Finished difference. Result has 102 places, 131 transitions, 398 flow [2022-12-13 15:04:22,563 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1291, PETRI_DIFFERENCE_MINUEND_FLOW=386, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=398, PETRI_PLACES=102, PETRI_TRANSITIONS=131} [2022-12-13 15:04:22,563 INFO L288 CegarLoopForPetriNet]: 94 programPoint places, 8 predicate places. [2022-12-13 15:04:22,563 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 131 transitions, 398 flow [2022-12-13 15:04:22,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 613.3333333333334) internal successors, (1840), 3 states have internal predecessors, (1840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:04:22,564 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:04:22,564 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:04:22,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-13 15:04:22,564 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting threadErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-12-13 15:04:22,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:04:22,565 INFO L85 PathProgramCache]: Analyzing trace with hash -1951775121, now seen corresponding path program 1 times [2022-12-13 15:04:22,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:04:22,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315560178] [2022-12-13 15:04:22,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:04:22,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:04:22,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:04:22,628 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-13 15:04:22,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:04:22,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315560178] [2022-12-13 15:04:22,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315560178] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:04:22,629 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:04:22,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 15:04:22,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722273773] [2022-12-13 15:04:22,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:04:22,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:04:22,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:04:22,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:04:22,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 15:04:22,748 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 596 out of 1291 [2022-12-13 15:04:22,749 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 131 transitions, 398 flow. Second operand has 3 states, 3 states have (on average 600.3333333333334) internal successors, (1801), 3 states have internal predecessors, (1801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:04:22,749 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:04:22,749 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 596 of 1291 [2022-12-13 15:04:22,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:05:14,154 INFO L130 PetriNetUnfolder]: 530568/694261 cut-off events. [2022-12-13 15:05:14,155 INFO L131 PetriNetUnfolder]: For 108012/108012 co-relation queries the response was YES. [2022-12-13 15:05:15,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1577015 conditions, 694261 events. 530568/694261 cut-off events. For 108012/108012 co-relation queries the response was YES. Maximal size of possible extension queue 9477. Compared 4604121 event pairs, 295468 based on Foata normal form. 0/574000 useless extension candidates. Maximal degree in co-relation 1576989. Up to 584090 conditions per place. [2022-12-13 15:05:17,541 INFO L137 encePairwiseOnDemand]: 1270/1291 looper letters, 184 selfloop transitions, 32 changer transitions 0/219 dead transitions. [2022-12-13 15:05:17,541 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 219 transitions, 1081 flow [2022-12-13 15:05:17,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:05:17,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 15:05:17,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1969 transitions. [2022-12-13 15:05:17,546 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5083914278337206 [2022-12-13 15:05:17,546 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1969 transitions. [2022-12-13 15:05:17,546 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1969 transitions. [2022-12-13 15:05:17,547 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:05:17,547 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1969 transitions. [2022-12-13 15:05:17,550 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 656.3333333333334) internal successors, (1969), 3 states have internal predecessors, (1969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:05:17,553 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1291.0) internal successors, (5164), 4 states have internal predecessors, (5164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:05:17,554 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1291.0) internal successors, (5164), 4 states have internal predecessors, (5164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:05:17,554 INFO L175 Difference]: Start difference. First operand has 102 places, 131 transitions, 398 flow. Second operand 3 states and 1969 transitions. [2022-12-13 15:05:17,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 219 transitions, 1081 flow [2022-12-13 15:05:17,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 219 transitions, 1077 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 15:05:17,799 INFO L231 Difference]: Finished difference. Result has 105 places, 161 transitions, 694 flow [2022-12-13 15:05:17,799 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1291, PETRI_DIFFERENCE_MINUEND_FLOW=396, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=694, PETRI_PLACES=105, PETRI_TRANSITIONS=161} [2022-12-13 15:05:17,800 INFO L288 CegarLoopForPetriNet]: 94 programPoint places, 11 predicate places. [2022-12-13 15:05:17,800 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 161 transitions, 694 flow [2022-12-13 15:05:17,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 600.3333333333334) internal successors, (1801), 3 states have internal predecessors, (1801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:05:17,800 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:05:17,800 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2022-12-13 15:05:17,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-13 15:05:17,800 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-12-13 15:05:17,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:05:17,801 INFO L85 PathProgramCache]: Analyzing trace with hash 734886393, now seen corresponding path program 1 times [2022-12-13 15:05:17,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:05:17,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765785175] [2022-12-13 15:05:17,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:05:17,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:05:17,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:05:17,869 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 15:05:17,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:05:17,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765785175] [2022-12-13 15:05:17,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765785175] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:05:17,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486237072] [2022-12-13 15:05:17,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:05:17,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:05:17,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_072225cc-5f5c-4588-990c-cca1431577cc/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:05:17,871 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_072225cc-5f5c-4588-990c-cca1431577cc/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:05:17,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_072225cc-5f5c-4588-990c-cca1431577cc/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 15:05:17,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:05:17,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-13 15:05:17,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:05:18,016 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 15:05:18,016 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 15:05:18,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486237072] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:05:18,016 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 15:05:18,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2022-12-13 15:05:18,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611319933] [2022-12-13 15:05:18,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:05:18,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 15:05:18,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:05:18,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 15:05:18,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-12-13 15:05:18,045 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 601 out of 1291 [2022-12-13 15:05:18,048 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 161 transitions, 694 flow. Second operand has 6 states, 6 states have (on average 603.1666666666666) internal successors, (3619), 6 states have internal predecessors, (3619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:05:18,048 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:05:18,048 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 601 of 1291 [2022-12-13 15:05:18,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:06:05,562 INFO L130 PetriNetUnfolder]: 448236/590561 cut-off events. [2022-12-13 15:06:05,562 INFO L131 PetriNetUnfolder]: For 298412/298412 co-relation queries the response was YES. [2022-12-13 15:06:06,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1450142 conditions, 590561 events. 448236/590561 cut-off events. For 298412/298412 co-relation queries the response was YES. Maximal size of possible extension queue 8287. Compared 4043109 event pairs, 56469 based on Foata normal form. 24775/512305 useless extension candidates. Maximal degree in co-relation 1450115. Up to 239126 conditions per place. [2022-12-13 15:06:08,550 INFO L137 encePairwiseOnDemand]: 1284/1291 looper letters, 567 selfloop transitions, 11 changer transitions 7/587 dead transitions. [2022-12-13 15:06:08,550 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 587 transitions, 3622 flow [2022-12-13 15:06:08,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 15:06:08,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 15:06:08,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 4003 transitions. [2022-12-13 15:06:08,557 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5167828556674413 [2022-12-13 15:06:08,557 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 4003 transitions. [2022-12-13 15:06:08,557 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 4003 transitions. [2022-12-13 15:06:08,558 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:06:08,558 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 4003 transitions. [2022-12-13 15:06:08,563 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 667.1666666666666) internal successors, (4003), 6 states have internal predecessors, (4003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:06:08,573 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 1291.0) internal successors, (9037), 7 states have internal predecessors, (9037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:06:08,574 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 1291.0) internal successors, (9037), 7 states have internal predecessors, (9037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:06:08,574 INFO L175 Difference]: Start difference. First operand has 105 places, 161 transitions, 694 flow. Second operand 6 states and 4003 transitions. [2022-12-13 15:06:08,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 587 transitions, 3622 flow [2022-12-13 15:06:26,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 587 transitions, 3386 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-12-13 15:06:26,213 INFO L231 Difference]: Finished difference. Result has 106 places, 166 transitions, 667 flow [2022-12-13 15:06:26,213 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1291, PETRI_DIFFERENCE_MINUEND_FLOW=618, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=667, PETRI_PLACES=106, PETRI_TRANSITIONS=166} [2022-12-13 15:06:26,213 INFO L288 CegarLoopForPetriNet]: 94 programPoint places, 12 predicate places. [2022-12-13 15:06:26,213 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 166 transitions, 667 flow [2022-12-13 15:06:26,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 603.1666666666666) internal successors, (3619), 6 states have internal predecessors, (3619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:06:26,214 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:06:26,214 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:06:26,219 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_072225cc-5f5c-4588-990c-cca1431577cc/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-12-13 15:06:26,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_072225cc-5f5c-4588-990c-cca1431577cc/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-13 15:06:26,416 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting threadErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-12-13 15:06:26,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:06:26,417 INFO L85 PathProgramCache]: Analyzing trace with hash -97848807, now seen corresponding path program 2 times [2022-12-13 15:06:26,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:06:26,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167308764] [2022-12-13 15:06:26,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:06:26,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:06:26,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:06:26,476 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-13 15:06:26,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:06:26,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167308764] [2022-12-13 15:06:26,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167308764] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:06:26,477 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:06:26,477 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 15:06:26,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351327142] [2022-12-13 15:06:26,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:06:26,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:06:26,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:06:26,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:06:26,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 15:06:26,488 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 607 out of 1291 [2022-12-13 15:06:26,490 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 166 transitions, 667 flow. Second operand has 3 states, 3 states have (on average 612.0) internal successors, (1836), 3 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:06:26,490 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:06:26,490 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 607 of 1291 [2022-12-13 15:06:26,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:07:29,415 INFO L130 PetriNetUnfolder]: 623411/816459 cut-off events. [2022-12-13 15:07:29,415 INFO L131 PetriNetUnfolder]: For 500846/500846 co-relation queries the response was YES. [2022-12-13 15:07:30,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2148587 conditions, 816459 events. 623411/816459 cut-off events. For 500846/500846 co-relation queries the response was YES. Maximal size of possible extension queue 10391. Compared 5490045 event pairs, 323571 based on Foata normal form. 4395/708839 useless extension candidates. Maximal degree in co-relation 2148559. Up to 583359 conditions per place. [2022-12-13 15:07:33,487 INFO L137 encePairwiseOnDemand]: 1287/1291 looper letters, 265 selfloop transitions, 3 changer transitions 2/272 dead transitions. [2022-12-13 15:07:33,487 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 272 transitions, 1587 flow [2022-12-13 15:07:33,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:07:33,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 15:07:33,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2011 transitions. [2022-12-13 15:07:33,492 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5192357345726827 [2022-12-13 15:07:33,492 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2011 transitions. [2022-12-13 15:07:33,492 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2011 transitions. [2022-12-13 15:07:33,493 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:07:33,493 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2011 transitions. [2022-12-13 15:07:33,495 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 670.3333333333334) internal successors, (2011), 3 states have internal predecessors, (2011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:07:33,499 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1291.0) internal successors, (5164), 4 states have internal predecessors, (5164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:07:33,499 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1291.0) internal successors, (5164), 4 states have internal predecessors, (5164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:07:33,499 INFO L175 Difference]: Start difference. First operand has 106 places, 166 transitions, 667 flow. Second operand 3 states and 2011 transitions. [2022-12-13 15:07:33,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 272 transitions, 1587 flow [2022-12-13 15:07:34,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 272 transitions, 1582 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-12-13 15:07:34,363 INFO L231 Difference]: Finished difference. Result has 109 places, 169 transitions, 692 flow [2022-12-13 15:07:34,363 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1291, PETRI_DIFFERENCE_MINUEND_FLOW=664, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=692, PETRI_PLACES=109, PETRI_TRANSITIONS=169} [2022-12-13 15:07:34,363 INFO L288 CegarLoopForPetriNet]: 94 programPoint places, 15 predicate places. [2022-12-13 15:07:34,363 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 169 transitions, 692 flow [2022-12-13 15:07:34,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 612.0) internal successors, (1836), 3 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:07:34,364 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:07:34,364 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:07:34,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-13 15:07:34,364 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting threadErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-12-13 15:07:34,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:07:34,364 INFO L85 PathProgramCache]: Analyzing trace with hash -597849668, now seen corresponding path program 1 times [2022-12-13 15:07:34,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:07:34,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012709140] [2022-12-13 15:07:34,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:07:34,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:07:34,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:07:34,420 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-13 15:07:34,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:07:34,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012709140] [2022-12-13 15:07:34,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012709140] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:07:34,420 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:07:34,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 15:07:34,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331774129] [2022-12-13 15:07:34,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:07:34,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:07:34,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:07:34,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:07:34,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 15:07:34,519 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 596 out of 1291 [2022-12-13 15:07:34,520 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 169 transitions, 692 flow. Second operand has 3 states, 3 states have (on average 600.6666666666666) internal successors, (1802), 3 states have internal predecessors, (1802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:07:34,521 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:07:34,521 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 596 of 1291 [2022-12-13 15:07:34,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand