./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-C-DAC/pthread-demo-datarace-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66a57874-f885-4eda-9491-2cc67cc6a1a1/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66a57874-f885-4eda-9491-2cc67cc6a1a1/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66a57874-f885-4eda-9491-2cc67cc6a1a1/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66a57874-f885-4eda-9491-2cc67cc6a1a1/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-C-DAC/pthread-demo-datarace-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66a57874-f885-4eda-9491-2cc67cc6a1a1/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66a57874-f885-4eda-9491-2cc67cc6a1a1/bin/uautomizer-verify-uCwYo4JHxu --witnessprinter.witness.filename witness --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 81147b3e42a82bd92b2fd1c17836bc41bf8598e66ad2317620561a8ac507fa9a --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 08:00:48,263 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 08:00:48,329 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66a57874-f885-4eda-9491-2cc67cc6a1a1/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 08:00:48,335 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 08:00:48,336 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 08:00:48,360 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 08:00:48,361 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 08:00:48,361 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 08:00:48,362 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 08:00:48,363 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 08:00:48,364 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 08:00:48,364 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 08:00:48,365 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 08:00:48,366 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 08:00:48,366 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 08:00:48,367 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 08:00:48,368 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 08:00:48,368 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 08:00:48,369 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 08:00:48,370 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 08:00:48,370 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 08:00:48,371 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 08:00:48,372 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 08:00:48,372 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 08:00:48,373 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 08:00:48,374 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 08:00:48,374 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 08:00:48,375 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 08:00:48,375 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 08:00:48,376 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 08:00:48,376 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 08:00:48,377 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 08:00:48,377 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 08:00:48,391 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 08:00:48,391 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 08:00:48,391 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 08:00:48,392 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 08:00:48,392 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 08:00:48,392 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 08:00:48,393 INFO L153 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_66a57874-f885-4eda-9491-2cc67cc6a1a1/bin/uautomizer-verify-uCwYo4JHxu/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66a57874-f885-4eda-9491-2cc67cc6a1a1/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 81147b3e42a82bd92b2fd1c17836bc41bf8598e66ad2317620561a8ac507fa9a [2023-11-19 08:00:48,705 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 08:00:48,729 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 08:00:48,734 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 08:00:48,736 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 08:00:48,737 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 08:00:48,738 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66a57874-f885-4eda-9491-2cc67cc6a1a1/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/pthread-C-DAC/pthread-demo-datarace-1.i [2023-11-19 08:00:51,928 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 08:00:52,283 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 08:00:52,291 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66a57874-f885-4eda-9491-2cc67cc6a1a1/sv-benchmarks/c/pthread-C-DAC/pthread-demo-datarace-1.i [2023-11-19 08:00:52,316 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66a57874-f885-4eda-9491-2cc67cc6a1a1/bin/uautomizer-verify-uCwYo4JHxu/data/b8e9dfdd4/7e5866d7854042699cfc4470ccdd111a/FLAG8c26451ac [2023-11-19 08:00:52,331 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66a57874-f885-4eda-9491-2cc67cc6a1a1/bin/uautomizer-verify-uCwYo4JHxu/data/b8e9dfdd4/7e5866d7854042699cfc4470ccdd111a [2023-11-19 08:00:52,334 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 08:00:52,335 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 08:00:52,337 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 08:00:52,337 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 08:00:52,343 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 08:00:52,344 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:00:52" (1/1) ... [2023-11-19 08:00:52,345 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57b50a78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:52, skipping insertion in model container [2023-11-19 08:00:52,345 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:00:52" (1/1) ... [2023-11-19 08:00:52,406 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 08:00:52,614 WARN L240 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_66a57874-f885-4eda-9491-2cc67cc6a1a1/sv-benchmarks/c/pthread-C-DAC/pthread-demo-datarace-1.i[820,833] [2023-11-19 08:00:53,177 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 08:00:53,199 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 08:00:53,213 WARN L240 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_66a57874-f885-4eda-9491-2cc67cc6a1a1/sv-benchmarks/c/pthread-C-DAC/pthread-demo-datarace-1.i[820,833] [2023-11-19 08:00:53,273 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 08:00:53,424 INFO L206 MainTranslator]: Completed translation [2023-11-19 08:00:53,425 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:53 WrapperNode [2023-11-19 08:00:53,425 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 08:00:53,426 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 08:00:53,427 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 08:00:53,427 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 08:00:53,435 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:53" (1/1) ... [2023-11-19 08:00:53,459 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:53" (1/1) ... [2023-11-19 08:00:53,485 INFO L138 Inliner]: procedures = 364, calls = 20, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 61 [2023-11-19 08:00:53,485 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 08:00:53,486 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 08:00:53,486 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 08:00:53,487 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 08:00:53,497 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:53" (1/1) ... [2023-11-19 08:00:53,497 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:53" (1/1) ... [2023-11-19 08:00:53,502 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:53" (1/1) ... [2023-11-19 08:00:53,503 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:53" (1/1) ... [2023-11-19 08:00:53,509 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:53" (1/1) ... [2023-11-19 08:00:53,513 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:53" (1/1) ... [2023-11-19 08:00:53,515 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:53" (1/1) ... [2023-11-19 08:00:53,517 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:53" (1/1) ... [2023-11-19 08:00:53,520 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 08:00:53,521 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 08:00:53,522 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 08:00:53,522 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 08:00:53,523 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:53" (1/1) ... [2023-11-19 08:00:53,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 08:00:53,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66a57874-f885-4eda-9491-2cc67cc6a1a1/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:00:53,569 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66a57874-f885-4eda-9491-2cc67cc6a1a1/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 08:00:53,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66a57874-f885-4eda-9491-2cc67cc6a1a1/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 08:00:53,604 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 08:00:53,604 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 08:00:53,605 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 08:00:53,605 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 08:00:53,605 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-19 08:00:53,605 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 08:00:53,605 INFO L130 BoogieDeclarations]: Found specification of procedure thread_function_mutex [2023-11-19 08:00:53,606 INFO L138 BoogieDeclarations]: Found implementation of procedure thread_function_mutex [2023-11-19 08:00:53,606 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 08:00:53,606 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 08:00:53,606 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 08:00:53,608 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-19 08:00:53,771 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 08:00:53,773 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 08:00:53,937 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 08:00:53,947 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 08:00:53,948 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-19 08:00:53,952 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:00:53 BoogieIcfgContainer [2023-11-19 08:00:53,952 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 08:00:53,955 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 08:00:53,955 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 08:00:53,958 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 08:00:53,959 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 08:00:52" (1/3) ... [2023-11-19 08:00:53,960 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@429aaf65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:00:53, skipping insertion in model container [2023-11-19 08:00:53,960 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:53" (2/3) ... [2023-11-19 08:00:53,960 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@429aaf65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:00:53, skipping insertion in model container [2023-11-19 08:00:53,960 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:00:53" (3/3) ... [2023-11-19 08:00:53,962 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-demo-datarace-1.i [2023-11-19 08:00:53,972 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-19 08:00:53,984 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 08:00:53,984 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 08:00:53,984 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 08:00:54,046 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-11-19 08:00:54,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 85 places, 88 transitions, 183 flow [2023-11-19 08:00:54,158 INFO L124 PetriNetUnfolderBase]: 7/87 cut-off events. [2023-11-19 08:00:54,158 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-19 08:00:54,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92 conditions, 87 events. 7/87 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 82 event pairs, 0 based on Foata normal form. 0/79 useless extension candidates. Maximal degree in co-relation 38. Up to 2 conditions per place. [2023-11-19 08:00:54,164 INFO L82 GeneralOperation]: Start removeDead. Operand has 85 places, 88 transitions, 183 flow [2023-11-19 08:00:54,169 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 74 places, 76 transitions, 158 flow [2023-11-19 08:00:54,173 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 08:00:54,185 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 74 places, 76 transitions, 158 flow [2023-11-19 08:00:54,188 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 74 places, 76 transitions, 158 flow [2023-11-19 08:00:54,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 74 places, 76 transitions, 158 flow [2023-11-19 08:00:54,221 INFO L124 PetriNetUnfolderBase]: 6/76 cut-off events. [2023-11-19 08:00:54,221 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-19 08:00:54,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81 conditions, 76 events. 6/76 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 77 event pairs, 0 based on Foata normal form. 0/70 useless extension candidates. Maximal degree in co-relation 38. Up to 2 conditions per place. [2023-11-19 08:00:54,224 INFO L119 LiptonReduction]: Number of co-enabled transitions 722 [2023-11-19 08:00:56,319 INFO L134 LiptonReduction]: Checked pairs total: 866 [2023-11-19 08:00:56,319 INFO L136 LiptonReduction]: Total number of compositions: 67 [2023-11-19 08:00:56,335 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 08:00:56,343 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=LoopHeads, 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;@453dda3a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 08:00:56,343 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-19 08:00:56,349 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 08:00:56,350 INFO L124 PetriNetUnfolderBase]: 2/14 cut-off events. [2023-11-19 08:00:56,350 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-19 08:00:56,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:00:56,351 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:00:56,351 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 08:00:56,357 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:56,357 INFO L85 PathProgramCache]: Analyzing trace with hash -1177362520, now seen corresponding path program 1 times [2023-11-19 08:00:56,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:56,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079478856] [2023-11-19 08:00:56,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:56,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:56,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:56,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:00:56,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:56,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079478856] [2023-11-19 08:00:56,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079478856] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:00:56,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:00:56,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 08:00:56,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962599590] [2023-11-19 08:00:56,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:00:56,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:00:56,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:56,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:00:56,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:00:56,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 155 [2023-11-19 08:00:56,810 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 17 places, 15 transitions, 36 flow. Second operand has 3 states, 3 states have (on average 76.66666666666667) internal successors, (230), 3 states have internal predecessors, (230), 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) [2023-11-19 08:00:56,810 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:00:56,810 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 155 [2023-11-19 08:00:56,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:00:56,881 INFO L124 PetriNetUnfolderBase]: 41/86 cut-off events. [2023-11-19 08:00:56,881 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-19 08:00:56,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 176 conditions, 86 events. 41/86 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 203 event pairs, 15 based on Foata normal form. 0/72 useless extension candidates. Maximal degree in co-relation 162. Up to 53 conditions per place. [2023-11-19 08:00:56,884 INFO L140 encePairwiseOnDemand]: 152/155 looper letters, 20 selfloop transitions, 2 changer transitions 0/23 dead transitions. [2023-11-19 08:00:56,884 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 19 places, 23 transitions, 96 flow [2023-11-19 08:00:56,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:00:56,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:00:56,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 245 transitions. [2023-11-19 08:00:56,905 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5268817204301075 [2023-11-19 08:00:56,906 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 245 transitions. [2023-11-19 08:00:56,907 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 245 transitions. [2023-11-19 08:00:56,908 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:00:56,911 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 245 transitions. [2023-11-19 08:00:56,915 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 81.66666666666667) internal successors, (245), 3 states have internal predecessors, (245), 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) [2023-11-19 08:00:56,920 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 155.0) internal successors, (620), 4 states have internal predecessors, (620), 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) [2023-11-19 08:00:56,921 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 155.0) internal successors, (620), 4 states have internal predecessors, (620), 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) [2023-11-19 08:00:56,923 INFO L175 Difference]: Start difference. First operand has 17 places, 15 transitions, 36 flow. Second operand 3 states and 245 transitions. [2023-11-19 08:00:56,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 19 places, 23 transitions, 96 flow [2023-11-19 08:00:56,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 17 places, 23 transitions, 92 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 08:00:56,928 INFO L231 Difference]: Finished difference. Result has 18 places, 16 transitions, 44 flow [2023-11-19 08:00:56,931 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=155, PETRI_DIFFERENCE_MINUEND_FLOW=32, PETRI_DIFFERENCE_MINUEND_PLACES=15, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=44, PETRI_PLACES=18, PETRI_TRANSITIONS=16} [2023-11-19 08:00:56,934 INFO L281 CegarLoopForPetriNet]: 17 programPoint places, 1 predicate places. [2023-11-19 08:00:56,935 INFO L495 AbstractCegarLoop]: Abstraction has has 18 places, 16 transitions, 44 flow [2023-11-19 08:00:56,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.66666666666667) internal successors, (230), 3 states have internal predecessors, (230), 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) [2023-11-19 08:00:56,936 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:00:56,936 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:00:56,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 08:00:56,937 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 08:00:56,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:56,937 INFO L85 PathProgramCache]: Analyzing trace with hash 1533867538, now seen corresponding path program 1 times [2023-11-19 08:00:56,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:56,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804857659] [2023-11-19 08:00:56,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:56,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:56,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:57,107 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:00:57,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:57,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804857659] [2023-11-19 08:00:57,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804857659] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:00:57,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:00:57,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 08:00:57,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11995999] [2023-11-19 08:00:57,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:00:57,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:00:57,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:57,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:00:57,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:00:57,136 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 155 [2023-11-19 08:00:57,137 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 18 places, 16 transitions, 44 flow. Second operand has 3 states, 3 states have (on average 76.0) internal successors, (228), 3 states have internal predecessors, (228), 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) [2023-11-19 08:00:57,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:00:57,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 155 [2023-11-19 08:00:57,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:00:57,245 INFO L124 PetriNetUnfolderBase]: 61/143 cut-off events. [2023-11-19 08:00:57,246 INFO L125 PetriNetUnfolderBase]: For 28/28 co-relation queries the response was YES. [2023-11-19 08:00:57,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 302 conditions, 143 events. 61/143 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 481 event pairs, 27 based on Foata normal form. 0/133 useless extension candidates. Maximal degree in co-relation 92. Up to 85 conditions per place. [2023-11-19 08:00:57,250 INFO L140 encePairwiseOnDemand]: 152/155 looper letters, 22 selfloop transitions, 2 changer transitions 0/25 dead transitions. [2023-11-19 08:00:57,251 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 20 places, 25 transitions, 120 flow [2023-11-19 08:00:57,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:00:57,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:00:57,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 239 transitions. [2023-11-19 08:00:57,258 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.513978494623656 [2023-11-19 08:00:57,259 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 239 transitions. [2023-11-19 08:00:57,259 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 239 transitions. [2023-11-19 08:00:57,260 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:00:57,260 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 239 transitions. [2023-11-19 08:00:57,263 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 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) [2023-11-19 08:00:57,266 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 155.0) internal successors, (620), 4 states have internal predecessors, (620), 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) [2023-11-19 08:00:57,267 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 155.0) internal successors, (620), 4 states have internal predecessors, (620), 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) [2023-11-19 08:00:57,267 INFO L175 Difference]: Start difference. First operand has 18 places, 16 transitions, 44 flow. Second operand 3 states and 239 transitions. [2023-11-19 08:00:57,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 20 places, 25 transitions, 120 flow [2023-11-19 08:00:57,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 25 transitions, 116 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 08:00:57,274 INFO L231 Difference]: Finished difference. Result has 20 places, 17 transitions, 54 flow [2023-11-19 08:00:57,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=155, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=54, PETRI_PLACES=20, PETRI_TRANSITIONS=17} [2023-11-19 08:00:57,276 INFO L281 CegarLoopForPetriNet]: 17 programPoint places, 3 predicate places. [2023-11-19 08:00:57,276 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 17 transitions, 54 flow [2023-11-19 08:00:57,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.0) internal successors, (228), 3 states have internal predecessors, (228), 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) [2023-11-19 08:00:57,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:00:57,278 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:00:57,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 08:00:57,279 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 08:00:57,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:57,288 INFO L85 PathProgramCache]: Analyzing trace with hash -583994317, now seen corresponding path program 1 times [2023-11-19 08:00:57,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:57,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872918917] [2023-11-19 08:00:57,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:57,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:57,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:57,407 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:00:57,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:57,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872918917] [2023-11-19 08:00:57,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872918917] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:00:57,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970510864] [2023-11-19 08:00:57,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:57,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:00:57,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66a57874-f885-4eda-9491-2cc67cc6a1a1/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:00:57,411 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66a57874-f885-4eda-9491-2cc67cc6a1a1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:00:57,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66a57874-f885-4eda-9491-2cc67cc6a1a1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 08:00:57,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:57,519 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 08:00:57,525 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:00:57,599 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:00:57,603 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:00:57,644 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:00:57,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970510864] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:00:57,644 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:00:57,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-11-19 08:00:57,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910682813] [2023-11-19 08:00:57,645 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:00:57,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 08:00:57,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:57,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 08:00:57,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-19 08:00:57,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 155 [2023-11-19 08:00:57,677 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 17 transitions, 54 flow. Second operand has 7 states, 7 states have (on average 74.57142857142857) internal successors, (522), 7 states have internal predecessors, (522), 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) [2023-11-19 08:00:57,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:00:57,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 155 [2023-11-19 08:00:57,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:00:57,816 INFO L124 PetriNetUnfolderBase]: 111/264 cut-off events. [2023-11-19 08:00:57,816 INFO L125 PetriNetUnfolderBase]: For 113/113 co-relation queries the response was YES. [2023-11-19 08:00:57,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 608 conditions, 264 events. 111/264 cut-off events. For 113/113 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 935 event pairs, 18 based on Foata normal form. 30/294 useless extension candidates. Maximal degree in co-relation 198. Up to 55 conditions per place. [2023-11-19 08:00:57,821 INFO L140 encePairwiseOnDemand]: 151/155 looper letters, 44 selfloop transitions, 6 changer transitions 0/51 dead transitions. [2023-11-19 08:00:57,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 51 transitions, 258 flow [2023-11-19 08:00:57,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 08:00:57,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-19 08:00:57,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 474 transitions. [2023-11-19 08:00:57,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5096774193548387 [2023-11-19 08:00:57,824 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 474 transitions. [2023-11-19 08:00:57,824 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 474 transitions. [2023-11-19 08:00:57,825 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:00:57,825 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 474 transitions. [2023-11-19 08:00:57,826 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 79.0) internal successors, (474), 6 states have internal predecessors, (474), 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) [2023-11-19 08:00:57,829 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 155.0) internal successors, (1085), 7 states have internal predecessors, (1085), 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) [2023-11-19 08:00:57,830 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 155.0) internal successors, (1085), 7 states have internal predecessors, (1085), 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) [2023-11-19 08:00:57,830 INFO L175 Difference]: Start difference. First operand has 20 places, 17 transitions, 54 flow. Second operand 6 states and 474 transitions. [2023-11-19 08:00:57,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 51 transitions, 258 flow [2023-11-19 08:00:57,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 51 transitions, 256 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 08:00:57,833 INFO L231 Difference]: Finished difference. Result has 28 places, 20 transitions, 92 flow [2023-11-19 08:00:57,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=155, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=92, PETRI_PLACES=28, PETRI_TRANSITIONS=20} [2023-11-19 08:00:57,834 INFO L281 CegarLoopForPetriNet]: 17 programPoint places, 11 predicate places. [2023-11-19 08:00:57,834 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 20 transitions, 92 flow [2023-11-19 08:00:57,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 74.57142857142857) internal successors, (522), 7 states have internal predecessors, (522), 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) [2023-11-19 08:00:57,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:00:57,835 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:00:57,862 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66a57874-f885-4eda-9491-2cc67cc6a1a1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-19 08:00:58,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66a57874-f885-4eda-9491-2cc67cc6a1a1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:00:58,058 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 08:00:58,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:58,058 INFO L85 PathProgramCache]: Analyzing trace with hash -1938670526, now seen corresponding path program 2 times [2023-11-19 08:00:58,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:58,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12071186] [2023-11-19 08:00:58,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:58,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:58,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:58,216 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-19 08:00:58,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:58,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12071186] [2023-11-19 08:00:58,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12071186] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:00:58,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108730613] [2023-11-19 08:00:58,217 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 08:00:58,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:00:58,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66a57874-f885-4eda-9491-2cc67cc6a1a1/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:00:58,219 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66a57874-f885-4eda-9491-2cc67cc6a1a1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:00:58,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66a57874-f885-4eda-9491-2cc67cc6a1a1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 08:00:58,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 08:00:58,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 08:00:58,329 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 08:00:58,340 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:00:58,447 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 08:00:58,448 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:00:58,565 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 08:00:58,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108730613] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:00:58,565 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:00:58,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2023-11-19 08:00:58,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95865528] [2023-11-19 08:00:58,566 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:00:58,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-19 08:00:58,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:58,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-19 08:00:58,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-11-19 08:00:58,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 155 [2023-11-19 08:00:58,640 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 20 transitions, 92 flow. Second operand has 14 states, 14 states have (on average 70.21428571428571) internal successors, (983), 14 states have internal predecessors, (983), 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) [2023-11-19 08:00:58,640 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:00:58,641 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 155 [2023-11-19 08:00:58,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:00:59,241 INFO L124 PetriNetUnfolderBase]: 323/744 cut-off events. [2023-11-19 08:00:59,242 INFO L125 PetriNetUnfolderBase]: For 1524/1524 co-relation queries the response was YES. [2023-11-19 08:00:59,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2272 conditions, 744 events. 323/744 cut-off events. For 1524/1524 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 3089 event pairs, 10 based on Foata normal form. 107/851 useless extension candidates. Maximal degree in co-relation 584. Up to 168 conditions per place. [2023-11-19 08:00:59,251 INFO L140 encePairwiseOnDemand]: 148/155 looper letters, 158 selfloop transitions, 69 changer transitions 0/228 dead transitions. [2023-11-19 08:00:59,251 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 228 transitions, 1346 flow [2023-11-19 08:00:59,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-19 08:00:59,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-11-19 08:00:59,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 2534 transitions. [2023-11-19 08:00:59,262 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4808349146110057 [2023-11-19 08:00:59,263 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 2534 transitions. [2023-11-19 08:00:59,263 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 2534 transitions. [2023-11-19 08:00:59,266 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:00:59,267 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 2534 transitions. [2023-11-19 08:00:59,276 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 74.52941176470588) internal successors, (2534), 34 states have internal predecessors, (2534), 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) [2023-11-19 08:00:59,290 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 155.0) internal successors, (5425), 35 states have internal predecessors, (5425), 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) [2023-11-19 08:00:59,293 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 155.0) internal successors, (5425), 35 states have internal predecessors, (5425), 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) [2023-11-19 08:00:59,293 INFO L175 Difference]: Start difference. First operand has 28 places, 20 transitions, 92 flow. Second operand 34 states and 2534 transitions. [2023-11-19 08:00:59,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 228 transitions, 1346 flow [2023-11-19 08:00:59,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 228 transitions, 1286 flow, removed 27 selfloop flow, removed 1 redundant places. [2023-11-19 08:00:59,307 INFO L231 Difference]: Finished difference. Result has 85 places, 82 transitions, 724 flow [2023-11-19 08:00:59,307 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=155, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=724, PETRI_PLACES=85, PETRI_TRANSITIONS=82} [2023-11-19 08:00:59,308 INFO L281 CegarLoopForPetriNet]: 17 programPoint places, 68 predicate places. [2023-11-19 08:00:59,308 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 82 transitions, 724 flow [2023-11-19 08:00:59,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 70.21428571428571) internal successors, (983), 14 states have internal predecessors, (983), 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) [2023-11-19 08:00:59,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:00:59,309 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:00:59,331 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66a57874-f885-4eda-9491-2cc67cc6a1a1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 08:00:59,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66a57874-f885-4eda-9491-2cc67cc6a1a1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:00:59,523 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 08:00:59,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:59,524 INFO L85 PathProgramCache]: Analyzing trace with hash -1848940042, now seen corresponding path program 3 times [2023-11-19 08:00:59,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:59,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937393358] [2023-11-19 08:00:59,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:59,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:59,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:59,982 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-19 08:00:59,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:59,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937393358] [2023-11-19 08:00:59,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937393358] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:00:59,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847978513] [2023-11-19 08:00:59,983 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 08:00:59,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:00:59,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66a57874-f885-4eda-9491-2cc67cc6a1a1/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:00:59,985 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66a57874-f885-4eda-9491-2cc67cc6a1a1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:01:00,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66a57874-f885-4eda-9491-2cc67cc6a1a1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 08:01:00,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-19 08:01:00,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 08:01:00,117 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 08:01:00,121 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:01:00,176 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2023-11-19 08:01:00,176 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:01:00,234 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2023-11-19 08:01:00,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847978513] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:01:00,234 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:01:00,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5, 5] total 19 [2023-11-19 08:01:00,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400194355] [2023-11-19 08:01:00,235 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:01:00,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-19 08:01:00,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:01:00,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-19 08:01:00,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2023-11-19 08:01:00,296 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 155 [2023-11-19 08:01:00,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 82 transitions, 724 flow. Second operand has 19 states, 19 states have (on average 69.94736842105263) internal successors, (1329), 19 states have internal predecessors, (1329), 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) [2023-11-19 08:01:00,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:01:00,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 155 [2023-11-19 08:01:00,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:01:02,229 INFO L124 PetriNetUnfolderBase]: 703/1500 cut-off events. [2023-11-19 08:01:02,229 INFO L125 PetriNetUnfolderBase]: For 27827/27827 co-relation queries the response was YES. [2023-11-19 08:01:02,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7760 conditions, 1500 events. 703/1500 cut-off events. For 27827/27827 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 7285 event pairs, 14 based on Foata normal form. 131/1631 useless extension candidates. Maximal degree in co-relation 5829. Up to 351 conditions per place. [2023-11-19 08:01:02,253 INFO L140 encePairwiseOnDemand]: 148/155 looper letters, 330 selfloop transitions, 186 changer transitions 0/517 dead transitions. [2023-11-19 08:01:02,254 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 517 transitions, 5320 flow [2023-11-19 08:01:02,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2023-11-19 08:01:02,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2023-11-19 08:01:02,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 6260 transitions. [2023-11-19 08:01:02,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47514231499051235 [2023-11-19 08:01:02,276 INFO L72 ComplementDD]: Start complementDD. Operand 85 states and 6260 transitions. [2023-11-19 08:01:02,276 INFO L73 IsDeterministic]: Start isDeterministic. Operand 85 states and 6260 transitions. [2023-11-19 08:01:02,281 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:01:02,281 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 85 states and 6260 transitions. [2023-11-19 08:01:02,299 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 86 states, 85 states have (on average 73.6470588235294) internal successors, (6260), 85 states have internal predecessors, (6260), 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) [2023-11-19 08:01:02,326 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 86 states, 86 states have (on average 155.0) internal successors, (13330), 86 states have internal predecessors, (13330), 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) [2023-11-19 08:01:02,333 INFO L81 ComplementDD]: Finished complementDD. Result has 86 states, 86 states have (on average 155.0) internal successors, (13330), 86 states have internal predecessors, (13330), 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) [2023-11-19 08:01:02,333 INFO L175 Difference]: Start difference. First operand has 85 places, 82 transitions, 724 flow. Second operand 85 states and 6260 transitions. [2023-11-19 08:01:02,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 517 transitions, 5320 flow [2023-11-19 08:01:02,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 517 transitions, 5222 flow, removed 14 selfloop flow, removed 4 redundant places. [2023-11-19 08:01:02,396 INFO L231 Difference]: Finished difference. Result has 227 places, 208 transitions, 3292 flow [2023-11-19 08:01:02,397 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=155, PETRI_DIFFERENCE_MINUEND_FLOW=662, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=85, PETRI_FLOW=3292, PETRI_PLACES=227, PETRI_TRANSITIONS=208} [2023-11-19 08:01:02,398 INFO L281 CegarLoopForPetriNet]: 17 programPoint places, 210 predicate places. [2023-11-19 08:01:02,398 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 208 transitions, 3292 flow [2023-11-19 08:01:02,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 69.94736842105263) internal successors, (1329), 19 states have internal predecessors, (1329), 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) [2023-11-19 08:01:02,399 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:01:02,399 INFO L208 CegarLoopForPetriNet]: trace histogram [11, 11, 11, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:01:02,426 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66a57874-f885-4eda-9491-2cc67cc6a1a1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 08:01:02,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66a57874-f885-4eda-9491-2cc67cc6a1a1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:01:02,615 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 08:01:02,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:01:02,616 INFO L85 PathProgramCache]: Analyzing trace with hash -1467666847, now seen corresponding path program 4 times [2023-11-19 08:01:02,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:01:02,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452325604] [2023-11-19 08:01:02,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:02,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:01:02,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:01:02,961 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 11 proven. 66 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2023-11-19 08:01:02,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:01:02,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452325604] [2023-11-19 08:01:02,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452325604] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:01:02,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724578010] [2023-11-19 08:01:02,962 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-19 08:01:02,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:01:02,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66a57874-f885-4eda-9491-2cc67cc6a1a1/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:01:02,963 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66a57874-f885-4eda-9491-2cc67cc6a1a1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:01:02,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66a57874-f885-4eda-9491-2cc67cc6a1a1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 08:01:03,219 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-19 08:01:03,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 08:01:03,221 INFO L262 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 08:01:03,224 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:01:03,332 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 11 proven. 66 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2023-11-19 08:01:03,332 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:01:03,491 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 11 proven. 66 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2023-11-19 08:01:03,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724578010] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:01:03,492 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:01:03,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2023-11-19 08:01:03,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656275494] [2023-11-19 08:01:03,492 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:01:03,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-19 08:01:03,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:01:03,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-19 08:01:03,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2023-11-19 08:01:03,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 155 [2023-11-19 08:01:03,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 208 transitions, 3292 flow. Second operand has 17 states, 17 states have (on average 77.0) internal successors, (1309), 17 states have internal predecessors, (1309), 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) [2023-11-19 08:01:03,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:01:03,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 155 [2023-11-19 08:01:03,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:01:05,350 INFO L124 PetriNetUnfolderBase]: 1535/3145 cut-off events. [2023-11-19 08:01:05,351 INFO L125 PetriNetUnfolderBase]: For 349906/349908 co-relation queries the response was YES. [2023-11-19 08:01:05,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23102 conditions, 3145 events. 1535/3145 cut-off events. For 349906/349908 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 16922 event pairs, 96 based on Foata normal form. 210/3355 useless extension candidates. Maximal degree in co-relation 20262. Up to 767 conditions per place. [2023-11-19 08:01:05,421 INFO L140 encePairwiseOnDemand]: 151/155 looper letters, 494 selfloop transitions, 198 changer transitions 0/693 dead transitions. [2023-11-19 08:01:05,421 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 693 transitions, 12154 flow [2023-11-19 08:01:05,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-19 08:01:05,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-19 08:01:05,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1299 transitions. [2023-11-19 08:01:05,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5237903225806452 [2023-11-19 08:01:05,427 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1299 transitions. [2023-11-19 08:01:05,427 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1299 transitions. [2023-11-19 08:01:05,428 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:01:05,428 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1299 transitions. [2023-11-19 08:01:05,431 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 81.1875) internal successors, (1299), 16 states have internal predecessors, (1299), 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) [2023-11-19 08:01:05,435 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 155.0) internal successors, (2635), 17 states have internal predecessors, (2635), 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) [2023-11-19 08:01:05,436 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 155.0) internal successors, (2635), 17 states have internal predecessors, (2635), 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) [2023-11-19 08:01:05,436 INFO L175 Difference]: Start difference. First operand has 227 places, 208 transitions, 3292 flow. Second operand 16 states and 1299 transitions. [2023-11-19 08:01:05,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 693 transitions, 12154 flow [2023-11-19 08:01:06,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 693 transitions, 8518 flow, removed 1584 selfloop flow, removed 27 redundant places. [2023-11-19 08:01:06,292 INFO L231 Difference]: Finished difference. Result has 224 places, 316 transitions, 3574 flow [2023-11-19 08:01:06,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=155, PETRI_DIFFERENCE_MINUEND_FLOW=2056, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=3574, PETRI_PLACES=224, PETRI_TRANSITIONS=316} [2023-11-19 08:01:06,293 INFO L281 CegarLoopForPetriNet]: 17 programPoint places, 207 predicate places. [2023-11-19 08:01:06,293 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 316 transitions, 3574 flow [2023-11-19 08:01:06,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 77.0) internal successors, (1309), 17 states have internal predecessors, (1309), 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) [2023-11-19 08:01:06,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:01:06,295 INFO L208 CegarLoopForPetriNet]: trace histogram [14, 14, 14, 14, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:01:06,322 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66a57874-f885-4eda-9491-2cc67cc6a1a1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 08:01:06,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66a57874-f885-4eda-9491-2cc67cc6a1a1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-19 08:01:06,511 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 08:01:06,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:01:06,512 INFO L85 PathProgramCache]: Analyzing trace with hash -1604000257, now seen corresponding path program 5 times [2023-11-19 08:01:06,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:01:06,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057488463] [2023-11-19 08:01:06,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:06,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:01:06,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:01:07,085 INFO L134 CoverageAnalysis]: Checked inductivity of 554 backedges. 14 proven. 176 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2023-11-19 08:01:07,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:01:07,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057488463] [2023-11-19 08:01:07,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057488463] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:01:07,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709043193] [2023-11-19 08:01:07,086 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-19 08:01:07,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:01:07,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66a57874-f885-4eda-9491-2cc67cc6a1a1/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:01:07,088 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66a57874-f885-4eda-9491-2cc67cc6a1a1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:01:07,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66a57874-f885-4eda-9491-2cc67cc6a1a1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 08:01:07,363 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2023-11-19 08:01:07,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 08:01:07,366 INFO L262 TraceCheckSpWp]: Trace formula consists of 551 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-19 08:01:07,370 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:01:07,512 INFO L134 CoverageAnalysis]: Checked inductivity of 554 backedges. 14 proven. 176 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2023-11-19 08:01:07,512 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:01:07,834 INFO L134 CoverageAnalysis]: Checked inductivity of 554 backedges. 14 proven. 176 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2023-11-19 08:01:07,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709043193] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:01:07,834 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:01:07,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 23 [2023-11-19 08:01:07,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326389083] [2023-11-19 08:01:07,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:01:07,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-19 08:01:07,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:01:07,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-19 08:01:07,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2023-11-19 08:01:07,877 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 155 [2023-11-19 08:01:07,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 316 transitions, 3574 flow. Second operand has 23 states, 23 states have (on average 73.6086956521739) internal successors, (1693), 23 states have internal predecessors, (1693), 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) [2023-11-19 08:01:07,879 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:01:07,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 155 [2023-11-19 08:01:07,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:01:11,201 INFO L124 PetriNetUnfolderBase]: 2538/5992 cut-off events. [2023-11-19 08:01:11,202 INFO L125 PetriNetUnfolderBase]: For 365593/365593 co-relation queries the response was YES. [2023-11-19 08:01:11,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34726 conditions, 5992 events. 2538/5992 cut-off events. For 365593/365593 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 36305 event pairs, 324 based on Foata normal form. 531/6523 useless extension candidates. Maximal degree in co-relation 31240. Up to 1298 conditions per place. [2023-11-19 08:01:11,382 INFO L140 encePairwiseOnDemand]: 151/155 looper letters, 516 selfloop transitions, 150 changer transitions 0/667 dead transitions. [2023-11-19 08:01:11,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 667 transitions, 12380 flow [2023-11-19 08:01:11,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-19 08:01:11,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-19 08:01:11,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1744 transitions. [2023-11-19 08:01:11,386 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5114369501466276 [2023-11-19 08:01:11,386 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1744 transitions. [2023-11-19 08:01:11,387 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1744 transitions. [2023-11-19 08:01:11,388 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:01:11,388 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1744 transitions. [2023-11-19 08:01:11,392 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 79.27272727272727) internal successors, (1744), 22 states have internal predecessors, (1744), 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) [2023-11-19 08:01:11,397 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 155.0) internal successors, (3565), 23 states have internal predecessors, (3565), 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) [2023-11-19 08:01:11,399 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 155.0) internal successors, (3565), 23 states have internal predecessors, (3565), 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) [2023-11-19 08:01:11,400 INFO L175 Difference]: Start difference. First operand has 224 places, 316 transitions, 3574 flow. Second operand 22 states and 1744 transitions. [2023-11-19 08:01:11,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 667 transitions, 12380 flow [2023-11-19 08:01:12,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 667 transitions, 12120 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-11-19 08:01:12,440 INFO L231 Difference]: Finished difference. Result has 250 places, 375 transitions, 4616 flow [2023-11-19 08:01:12,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=155, PETRI_DIFFERENCE_MINUEND_FLOW=3444, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=4616, PETRI_PLACES=250, PETRI_TRANSITIONS=375} [2023-11-19 08:01:12,441 INFO L281 CegarLoopForPetriNet]: 17 programPoint places, 233 predicate places. [2023-11-19 08:01:12,442 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 375 transitions, 4616 flow [2023-11-19 08:01:12,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 73.6086956521739) internal successors, (1693), 23 states have internal predecessors, (1693), 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) [2023-11-19 08:01:12,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:01:12,443 INFO L208 CegarLoopForPetriNet]: trace histogram [20, 20, 20, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:01:12,462 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66a57874-f885-4eda-9491-2cc67cc6a1a1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 08:01:12,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66a57874-f885-4eda-9491-2cc67cc6a1a1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-19 08:01:12,655 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 08:01:12,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:01:12,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1724777588, now seen corresponding path program 6 times [2023-11-19 08:01:12,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:01:12,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407103100] [2023-11-19 08:01:12,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:12,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:01:12,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:01:13,370 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 20 proven. 378 refuted. 0 times theorem prover too weak. 570 trivial. 0 not checked. [2023-11-19 08:01:13,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:01:13,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407103100] [2023-11-19 08:01:13,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407103100] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:01:13,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975829207] [2023-11-19 08:01:13,371 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-19 08:01:13,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:01:13,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66a57874-f885-4eda-9491-2cc67cc6a1a1/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:01:13,384 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66a57874-f885-4eda-9491-2cc67cc6a1a1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:01:13,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66a57874-f885-4eda-9491-2cc67cc6a1a1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 08:01:13,994 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 29 check-sat command(s) [2023-11-19 08:01:13,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 08:01:13,998 INFO L262 TraceCheckSpWp]: Trace formula consists of 656 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-19 08:01:14,004 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:01:14,185 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 20 proven. 378 refuted. 0 times theorem prover too weak. 570 trivial. 0 not checked. [2023-11-19 08:01:14,185 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:01:14,586 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 20 proven. 378 refuted. 0 times theorem prover too weak. 570 trivial. 0 not checked. [2023-11-19 08:01:14,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975829207] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:01:14,587 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:01:14,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 23 [2023-11-19 08:01:14,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091701987] [2023-11-19 08:01:14,588 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:01:14,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-19 08:01:14,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:01:14,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-19 08:01:14,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2023-11-19 08:01:14,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 155 [2023-11-19 08:01:14,648 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 375 transitions, 4616 flow. Second operand has 23 states, 23 states have (on average 77.17391304347827) internal successors, (1775), 23 states have internal predecessors, (1775), 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) [2023-11-19 08:01:14,648 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:01:14,648 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 155 [2023-11-19 08:01:14,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:01:19,371 INFO L124 PetriNetUnfolderBase]: 3570/7327 cut-off events. [2023-11-19 08:01:19,371 INFO L125 PetriNetUnfolderBase]: For 751132/751134 co-relation queries the response was YES. [2023-11-19 08:01:19,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50120 conditions, 7327 events. 3570/7327 cut-off events. For 751132/751134 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 45330 event pairs, 194 based on Foata normal form. 260/7587 useless extension candidates. Maximal degree in co-relation 45514. Up to 1826 conditions per place. [2023-11-19 08:01:19,509 INFO L140 encePairwiseOnDemand]: 151/155 looper letters, 1059 selfloop transitions, 270 changer transitions 0/1330 dead transitions. [2023-11-19 08:01:19,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 1330 transitions, 20652 flow [2023-11-19 08:01:19,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-19 08:01:19,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-19 08:01:19,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1783 transitions. [2023-11-19 08:01:19,513 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5228739002932551 [2023-11-19 08:01:19,513 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1783 transitions. [2023-11-19 08:01:19,514 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1783 transitions. [2023-11-19 08:01:19,515 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:01:19,515 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1783 transitions. [2023-11-19 08:01:19,518 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 81.04545454545455) internal successors, (1783), 22 states have internal predecessors, (1783), 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) [2023-11-19 08:01:19,523 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 155.0) internal successors, (3565), 23 states have internal predecessors, (3565), 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) [2023-11-19 08:01:19,525 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 155.0) internal successors, (3565), 23 states have internal predecessors, (3565), 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) [2023-11-19 08:01:19,525 INFO L175 Difference]: Start difference. First operand has 250 places, 375 transitions, 4616 flow. Second operand 22 states and 1783 transitions. [2023-11-19 08:01:19,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 1330 transitions, 20652 flow [2023-11-19 08:01:20,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 1330 transitions, 19882 flow, removed 0 selfloop flow, removed 11 redundant places. [2023-11-19 08:01:20,686 INFO L231 Difference]: Finished difference. Result has 267 places, 459 transitions, 6216 flow [2023-11-19 08:01:20,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=155, PETRI_DIFFERENCE_MINUEND_FLOW=4462, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=186, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=6216, PETRI_PLACES=267, PETRI_TRANSITIONS=459} [2023-11-19 08:01:20,688 INFO L281 CegarLoopForPetriNet]: 17 programPoint places, 250 predicate places. [2023-11-19 08:01:20,688 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 459 transitions, 6216 flow [2023-11-19 08:01:20,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 77.17391304347827) internal successors, (1775), 23 states have internal predecessors, (1775), 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) [2023-11-19 08:01:20,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:01:20,690 INFO L208 CegarLoopForPetriNet]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:01:20,708 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66a57874-f885-4eda-9491-2cc67cc6a1a1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 08:01:20,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66a57874-f885-4eda-9491-2cc67cc6a1a1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-19 08:01:20,898 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 08:01:20,898 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:01:20,898 INFO L85 PathProgramCache]: Analyzing trace with hash 331553514, now seen corresponding path program 7 times [2023-11-19 08:01:20,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:01:20,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689836968] [2023-11-19 08:01:20,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:20,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:01:21,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:01:26,464 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:01:26,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:01:26,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689836968] [2023-11-19 08:01:26,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689836968] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:01:26,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447373923] [2023-11-19 08:01:26,465 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-19 08:01:26,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:01:26,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66a57874-f885-4eda-9491-2cc67cc6a1a1/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:01:26,468 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66a57874-f885-4eda-9491-2cc67cc6a1a1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:01:26,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66a57874-f885-4eda-9491-2cc67cc6a1a1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 08:01:26,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:01:26,744 INFO L262 TraceCheckSpWp]: Trace formula consists of 812 conjuncts, 165 conjunts are in the unsatisfiable core [2023-11-19 08:01:26,751 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:01:26,981 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:01:26,981 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:01:27,196 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:01:27,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447373923] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:01:27,196 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:01:27,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61, 61] total 61 [2023-11-19 08:01:27,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934864159] [2023-11-19 08:01:27,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:01:27,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2023-11-19 08:01:27,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:01:27,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2023-11-19 08:01:27,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2023-11-19 08:01:28,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 155 [2023-11-19 08:01:28,569 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 459 transitions, 6216 flow. Second operand has 63 states, 63 states have (on average 73.34920634920636) internal successors, (4621), 63 states have internal predecessors, (4621), 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) [2023-11-19 08:01:28,569 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:01:28,569 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 155 [2023-11-19 08:01:28,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand