./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_75-tricky_address2_racefree.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_032276d8-f5e2-4d2c-ae28-5f0275b41bbe/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_032276d8-f5e2-4d2c-ae28-5f0275b41bbe/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_032276d8-f5e2-4d2c-ae28-5f0275b41bbe/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_032276d8-f5e2-4d2c-ae28-5f0275b41bbe/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_75-tricky_address2_racefree.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_032276d8-f5e2-4d2c-ae28-5f0275b41bbe/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_032276d8-f5e2-4d2c-ae28-5f0275b41bbe/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 3c0354ee6107efc04d15102ecf9eef73430e38e14b70f16419cd07cd733fd0df --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:42:33,651 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:42:33,746 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_032276d8-f5e2-4d2c-ae28-5f0275b41bbe/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 07:42:33,753 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:42:33,754 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:42:33,793 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:42:33,793 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:42:33,794 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:42:33,795 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:42:33,796 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:42:33,796 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:42:33,797 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:42:33,798 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:42:33,798 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:42:33,799 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:42:33,799 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:42:33,800 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:42:33,800 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:42:33,801 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:42:33,801 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:42:33,802 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:42:33,802 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:42:33,803 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:42:33,803 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:42:33,804 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:42:33,804 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:42:33,805 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:42:33,805 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:42:33,806 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:42:33,806 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:42:33,807 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:42:33,807 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:42:33,807 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:42:33,808 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:42:33,808 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:42:33,809 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:42:33,809 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:42:33,810 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:42:33,810 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:42:33,810 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_032276d8-f5e2-4d2c-ae28-5f0275b41bbe/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_032276d8-f5e2-4d2c-ae28-5f0275b41bbe/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3c0354ee6107efc04d15102ecf9eef73430e38e14b70f16419cd07cd733fd0df [2023-11-19 07:42:34,096 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:42:34,128 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:42:34,131 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:42:34,133 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:42:34,133 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:42:34,135 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_032276d8-f5e2-4d2c-ae28-5f0275b41bbe/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/goblint-regression/28-race_reach_75-tricky_address2_racefree.i [2023-11-19 07:42:37,301 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:42:37,667 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:42:37,667 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_032276d8-f5e2-4d2c-ae28-5f0275b41bbe/sv-benchmarks/c/goblint-regression/28-race_reach_75-tricky_address2_racefree.i [2023-11-19 07:42:37,692 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_032276d8-f5e2-4d2c-ae28-5f0275b41bbe/bin/uautomizer-verify-uCwYo4JHxu/data/4bb55e9b4/ad2cb9a45e86437b9053fc850cf1a41c/FLAG582760808 [2023-11-19 07:42:37,716 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_032276d8-f5e2-4d2c-ae28-5f0275b41bbe/bin/uautomizer-verify-uCwYo4JHxu/data/4bb55e9b4/ad2cb9a45e86437b9053fc850cf1a41c [2023-11-19 07:42:37,721 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:42:37,722 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:42:37,724 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:42:37,724 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:42:37,732 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:42:37,734 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:42:37" (1/1) ... [2023-11-19 07:42:37,736 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6cbd53c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:42:37, skipping insertion in model container [2023-11-19 07:42:37,736 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:42:37" (1/1) ... [2023-11-19 07:42:37,801 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:42:38,347 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_032276d8-f5e2-4d2c-ae28-5f0275b41bbe/sv-benchmarks/c/goblint-regression/28-race_reach_75-tricky_address2_racefree.i[41323,41336] [2023-11-19 07:42:38,398 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:42:38,433 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:42:38,487 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_032276d8-f5e2-4d2c-ae28-5f0275b41bbe/sv-benchmarks/c/goblint-regression/28-race_reach_75-tricky_address2_racefree.i[41323,41336] [2023-11-19 07:42:38,499 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:42:38,589 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:42:38,590 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:42:38 WrapperNode [2023-11-19 07:42:38,590 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:42:38,591 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:42:38,592 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:42:38,592 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:42:38,601 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:42:38" (1/1) ... [2023-11-19 07:42:38,634 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:42:38" (1/1) ... [2023-11-19 07:42:38,689 INFO L138 Inliner]: procedures = 270, calls = 41, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 192 [2023-11-19 07:42:38,690 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:42:38,690 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:42:38,691 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:42:38,691 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:42:38,701 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:42:38" (1/1) ... [2023-11-19 07:42:38,701 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:42:38" (1/1) ... [2023-11-19 07:42:38,715 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:42:38" (1/1) ... [2023-11-19 07:42:38,729 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:42:38" (1/1) ... [2023-11-19 07:42:38,738 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:42:38" (1/1) ... [2023-11-19 07:42:38,755 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:42:38" (1/1) ... [2023-11-19 07:42:38,757 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:42:38" (1/1) ... [2023-11-19 07:42:38,759 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:42:38" (1/1) ... [2023-11-19 07:42:38,767 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:42:38,768 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:42:38,769 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:42:38,769 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:42:38,770 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:42:38" (1/1) ... [2023-11-19 07:42:38,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:42:38,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_032276d8-f5e2-4d2c-ae28-5f0275b41bbe/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:42:38,808 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_032276d8-f5e2-4d2c-ae28-5f0275b41bbe/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:42:38,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_032276d8-f5e2-4d2c-ae28-5f0275b41bbe/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:42:38,846 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 07:42:38,846 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 07:42:38,846 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 07:42:38,847 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 07:42:38,847 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-19 07:42:38,848 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:42:38,848 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-11-19 07:42:38,848 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-11-19 07:42:38,848 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:42:38,848 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:42:38,849 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:42:38,851 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 07:42:39,073 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:42:39,076 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:42:39,541 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:42:39,552 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:42:39,557 INFO L302 CfgBuilder]: Removed 23 assume(true) statements. [2023-11-19 07:42:39,565 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:42:39 BoogieIcfgContainer [2023-11-19 07:42:39,565 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:42:39,571 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:42:39,571 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:42:39,575 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:42:39,576 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:42:37" (1/3) ... [2023-11-19 07:42:39,577 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@579b5e49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:42:39, skipping insertion in model container [2023-11-19 07:42:39,577 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:42:38" (2/3) ... [2023-11-19 07:42:39,580 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@579b5e49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:42:39, skipping insertion in model container [2023-11-19 07:42:39,580 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:42:39" (3/3) ... [2023-11-19 07:42:39,582 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_75-tricky_address2_racefree.i [2023-11-19 07:42:39,592 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-19 07:42:39,601 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:42:39,602 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-19 07:42:39,602 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 07:42:39,675 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-11-19 07:42:39,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 172 places, 200 transitions, 407 flow [2023-11-19 07:42:39,815 INFO L124 PetriNetUnfolderBase]: 45/275 cut-off events. [2023-11-19 07:42:39,815 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-19 07:42:39,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 280 conditions, 275 events. 45/275 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 893 event pairs, 0 based on Foata normal form. 0/224 useless extension candidates. Maximal degree in co-relation 152. Up to 8 conditions per place. [2023-11-19 07:42:39,823 INFO L82 GeneralOperation]: Start removeDead. Operand has 172 places, 200 transitions, 407 flow [2023-11-19 07:42:39,831 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 168 places, 195 transitions, 394 flow [2023-11-19 07:42:39,835 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:42:39,846 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 168 places, 195 transitions, 394 flow [2023-11-19 07:42:39,849 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 168 places, 195 transitions, 394 flow [2023-11-19 07:42:39,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 168 places, 195 transitions, 394 flow [2023-11-19 07:42:39,956 INFO L124 PetriNetUnfolderBase]: 44/270 cut-off events. [2023-11-19 07:42:39,957 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:42:39,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 274 conditions, 270 events. 44/270 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 856 event pairs, 0 based on Foata normal form. 0/219 useless extension candidates. Maximal degree in co-relation 152. Up to 8 conditions per place. [2023-11-19 07:42:39,993 INFO L119 LiptonReduction]: Number of co-enabled transitions 11664 [2023-11-19 07:42:43,633 INFO L134 LiptonReduction]: Checked pairs total: 18293 [2023-11-19 07:42:43,634 INFO L136 LiptonReduction]: Total number of compositions: 171 [2023-11-19 07:42:43,651 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:42:43,680 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;@d9d97b1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:42:43,680 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-19 07:42:43,687 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:42:43,687 INFO L124 PetriNetUnfolderBase]: 8/29 cut-off events. [2023-11-19 07:42:43,688 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:42:43,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:42:43,689 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-19 07:42:43,689 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-19 07:42:43,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:42:43,705 INFO L85 PathProgramCache]: Analyzing trace with hash 2070542085, now seen corresponding path program 1 times [2023-11-19 07:42:43,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:42:43,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203334482] [2023-11-19 07:42:43,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:42:43,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:42:43,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:44,032 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 07:42:44,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:42:44,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203334482] [2023-11-19 07:42:44,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203334482] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:42:44,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:42:44,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:42:44,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045689616] [2023-11-19 07:42:44,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:42:44,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:42:44,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:42:44,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:42:44,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:42:44,110 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 371 [2023-11-19 07:42:44,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 66 transitions, 136 flow. Second operand has 3 states, 3 states have (on average 165.0) internal successors, (495), 3 states have internal predecessors, (495), 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 07:42:44,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:42:44,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 371 [2023-11-19 07:42:44,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:42:44,322 INFO L124 PetriNetUnfolderBase]: 301/651 cut-off events. [2023-11-19 07:42:44,322 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:42:44,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1244 conditions, 651 events. 301/651 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 3186 event pairs, 266 based on Foata normal form. 107/643 useless extension candidates. Maximal degree in co-relation 1189. Up to 588 conditions per place. [2023-11-19 07:42:44,327 INFO L140 encePairwiseOnDemand]: 347/371 looper letters, 36 selfloop transitions, 2 changer transitions 0/46 dead transitions. [2023-11-19 07:42:44,328 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 46 transitions, 172 flow [2023-11-19 07:42:44,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:42:44,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:42:44,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 549 transitions. [2023-11-19 07:42:44,353 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49326145552560646 [2023-11-19 07:42:44,354 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 549 transitions. [2023-11-19 07:42:44,355 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 549 transitions. [2023-11-19 07:42:44,359 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:42:44,362 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 549 transitions. [2023-11-19 07:42:44,368 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 183.0) internal successors, (549), 3 states have internal predecessors, (549), 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 07:42:44,375 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 371.0) internal successors, (1484), 4 states have internal predecessors, (1484), 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 07:42:44,377 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 371.0) internal successors, (1484), 4 states have internal predecessors, (1484), 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 07:42:44,379 INFO L175 Difference]: Start difference. First operand has 45 places, 66 transitions, 136 flow. Second operand 3 states and 549 transitions. [2023-11-19 07:42:44,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 46 transitions, 172 flow [2023-11-19 07:42:44,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 46 transitions, 172 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-19 07:42:44,386 INFO L231 Difference]: Finished difference. Result has 48 places, 46 transitions, 106 flow [2023-11-19 07:42:44,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=371, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=48, PETRI_TRANSITIONS=46} [2023-11-19 07:42:44,392 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 3 predicate places. [2023-11-19 07:42:44,393 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 46 transitions, 106 flow [2023-11-19 07:42:44,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 165.0) internal successors, (495), 3 states have internal predecessors, (495), 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 07:42:44,394 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:42:44,394 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:42:44,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 07:42:44,395 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-19 07:42:44,406 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:42:44,406 INFO L85 PathProgramCache]: Analyzing trace with hash -833231303, now seen corresponding path program 1 times [2023-11-19 07:42:44,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:42:44,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394403535] [2023-11-19 07:42:44,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:42:44,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:42:44,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:44,534 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:42:44,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:42:44,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394403535] [2023-11-19 07:42:44,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394403535] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:42:44,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601139471] [2023-11-19 07:42:44,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:42:44,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:42:44,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_032276d8-f5e2-4d2c-ae28-5f0275b41bbe/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:42:44,538 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_032276d8-f5e2-4d2c-ae28-5f0275b41bbe/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:42:44,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_032276d8-f5e2-4d2c-ae28-5f0275b41bbe/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:42:44,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:44,628 INFO L262 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 07:42:44,632 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:42:44,659 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:42:44,659 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:42:44,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601139471] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:42:44,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:42:44,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-11-19 07:42:44,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026833699] [2023-11-19 07:42:44,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:42:44,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:42:44,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:42:44,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:42:44,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:42:44,690 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 371 [2023-11-19 07:42:44,692 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 46 transitions, 106 flow. Second operand has 3 states, 3 states have (on average 165.33333333333334) internal successors, (496), 3 states have internal predecessors, (496), 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 07:42:44,692 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:42:44,692 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 371 [2023-11-19 07:42:44,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:42:44,845 INFO L124 PetriNetUnfolderBase]: 283/635 cut-off events. [2023-11-19 07:42:44,845 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:42:44,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1218 conditions, 635 events. 283/635 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 3540 event pairs, 0 based on Foata normal form. 0/534 useless extension candidates. Maximal degree in co-relation 1206. Up to 555 conditions per place. [2023-11-19 07:42:44,850 INFO L140 encePairwiseOnDemand]: 368/371 looper letters, 51 selfloop transitions, 2 changer transitions 0/61 dead transitions. [2023-11-19 07:42:44,850 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 61 transitions, 242 flow [2023-11-19 07:42:44,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:42:44,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:42:44,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 542 transitions. [2023-11-19 07:42:44,861 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48697214734950584 [2023-11-19 07:42:44,861 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 542 transitions. [2023-11-19 07:42:44,861 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 542 transitions. [2023-11-19 07:42:44,862 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:42:44,862 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 542 transitions. [2023-11-19 07:42:44,866 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 180.66666666666666) internal successors, (542), 3 states have internal predecessors, (542), 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 07:42:44,870 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 371.0) internal successors, (1484), 4 states have internal predecessors, (1484), 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 07:42:44,871 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 371.0) internal successors, (1484), 4 states have internal predecessors, (1484), 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 07:42:44,877 INFO L175 Difference]: Start difference. First operand has 48 places, 46 transitions, 106 flow. Second operand 3 states and 542 transitions. [2023-11-19 07:42:44,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 61 transitions, 242 flow [2023-11-19 07:42:44,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 61 transitions, 238 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-19 07:42:44,881 INFO L231 Difference]: Finished difference. Result has 50 places, 46 transitions, 110 flow [2023-11-19 07:42:44,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=371, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=110, PETRI_PLACES=50, PETRI_TRANSITIONS=46} [2023-11-19 07:42:44,883 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 5 predicate places. [2023-11-19 07:42:44,883 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 46 transitions, 110 flow [2023-11-19 07:42:44,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 165.33333333333334) internal successors, (496), 3 states have internal predecessors, (496), 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 07:42:44,884 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:42:44,884 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-11-19 07:42:44,911 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_032276d8-f5e2-4d2c-ae28-5f0275b41bbe/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 07:42:45,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_032276d8-f5e2-4d2c-ae28-5f0275b41bbe/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:42:45,106 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-19 07:42:45,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:42:45,106 INFO L85 PathProgramCache]: Analyzing trace with hash -82574732, now seen corresponding path program 1 times [2023-11-19 07:42:45,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:42:45,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716747471] [2023-11-19 07:42:45,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:42:45,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:42:45,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:45,283 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 07:42:45,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:42:45,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716747471] [2023-11-19 07:42:45,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716747471] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:42:45,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008979077] [2023-11-19 07:42:45,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:42:45,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:42:45,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_032276d8-f5e2-4d2c-ae28-5f0275b41bbe/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:42:45,289 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_032276d8-f5e2-4d2c-ae28-5f0275b41bbe/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:42:45,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_032276d8-f5e2-4d2c-ae28-5f0275b41bbe/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:42:45,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:45,400 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 07:42:45,402 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:42:45,442 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 07:42:45,442 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:42:45,469 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 07:42:45,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008979077] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:42:45,471 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:42:45,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-19 07:42:45,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740714437] [2023-11-19 07:42:45,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:42:45,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 07:42:45,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:42:45,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 07:42:45,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-19 07:42:45,503 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 371 [2023-11-19 07:42:45,506 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 46 transitions, 110 flow. Second operand has 7 states, 7 states have (on average 163.57142857142858) internal successors, (1145), 7 states have internal predecessors, (1145), 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 07:42:45,506 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:42:45,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 371 [2023-11-19 07:42:45,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:42:45,721 INFO L124 PetriNetUnfolderBase]: 301/637 cut-off events. [2023-11-19 07:42:45,721 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2023-11-19 07:42:45,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1271 conditions, 637 events. 301/637 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 3072 event pairs, 266 based on Foata normal form. 3/547 useless extension candidates. Maximal degree in co-relation 1244. Up to 571 conditions per place. [2023-11-19 07:42:45,726 INFO L140 encePairwiseOnDemand]: 368/371 looper letters, 36 selfloop transitions, 5 changer transitions 0/49 dead transitions. [2023-11-19 07:42:45,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 49 transitions, 204 flow [2023-11-19 07:42:45,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:42:45,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-19 07:42:45,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1016 transitions. [2023-11-19 07:42:45,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4564240790655885 [2023-11-19 07:42:45,731 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1016 transitions. [2023-11-19 07:42:45,731 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1016 transitions. [2023-11-19 07:42:45,732 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:42:45,732 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1016 transitions. [2023-11-19 07:42:45,736 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 169.33333333333334) internal successors, (1016), 6 states have internal predecessors, (1016), 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 07:42:45,741 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 371.0) internal successors, (2597), 7 states have internal predecessors, (2597), 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 07:42:45,743 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 371.0) internal successors, (2597), 7 states have internal predecessors, (2597), 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 07:42:45,744 INFO L175 Difference]: Start difference. First operand has 50 places, 46 transitions, 110 flow. Second operand 6 states and 1016 transitions. [2023-11-19 07:42:45,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 49 transitions, 204 flow [2023-11-19 07:42:45,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 49 transitions, 200 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 07:42:45,749 INFO L231 Difference]: Finished difference. Result has 56 places, 49 transitions, 142 flow [2023-11-19 07:42:45,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=371, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=142, PETRI_PLACES=56, PETRI_TRANSITIONS=49} [2023-11-19 07:42:45,751 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 11 predicate places. [2023-11-19 07:42:45,751 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 49 transitions, 142 flow [2023-11-19 07:42:45,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 163.57142857142858) internal successors, (1145), 7 states have internal predecessors, (1145), 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 07:42:45,752 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:42:45,753 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2023-11-19 07:42:45,782 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_032276d8-f5e2-4d2c-ae28-5f0275b41bbe/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-19 07:42:45,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_032276d8-f5e2-4d2c-ae28-5f0275b41bbe/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:42:45,967 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-19 07:42:45,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:42:45,967 INFO L85 PathProgramCache]: Analyzing trace with hash 15433256, now seen corresponding path program 2 times [2023-11-19 07:42:45,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:42:45,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812489644] [2023-11-19 07:42:45,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:42:45,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:42:46,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:46,128 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 07:42:46,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:42:46,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812489644] [2023-11-19 07:42:46,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812489644] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:42:46,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026040823] [2023-11-19 07:42:46,129 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:42:46,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:42:46,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_032276d8-f5e2-4d2c-ae28-5f0275b41bbe/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:42:46,131 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_032276d8-f5e2-4d2c-ae28-5f0275b41bbe/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:42:46,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_032276d8-f5e2-4d2c-ae28-5f0275b41bbe/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 07:42:46,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:42:46,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:42:46,223 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:42:46,226 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:42:46,256 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 07:42:46,257 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:42:46,331 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 07:42:46,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026040823] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:42:46,332 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:42:46,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-19 07:42:46,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439933773] [2023-11-19 07:42:46,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:42:46,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-19 07:42:46,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:42:46,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-19 07:42:46,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-19 07:42:46,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 371 [2023-11-19 07:42:46,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 49 transitions, 142 flow. Second operand has 13 states, 13 states have (on average 163.30769230769232) internal successors, (2123), 13 states have internal predecessors, (2123), 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 07:42:46,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:42:46,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 371 [2023-11-19 07:42:46,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:42:46,579 INFO L124 PetriNetUnfolderBase]: 301/643 cut-off events. [2023-11-19 07:42:46,579 INFO L125 PetriNetUnfolderBase]: For 54/54 co-relation queries the response was YES. [2023-11-19 07:42:46,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1294 conditions, 643 events. 301/643 cut-off events. For 54/54 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 3084 event pairs, 266 based on Foata normal form. 6/556 useless extension candidates. Maximal degree in co-relation 1235. Up to 571 conditions per place. [2023-11-19 07:42:46,584 INFO L140 encePairwiseOnDemand]: 368/371 looper letters, 36 selfloop transitions, 11 changer transitions 0/55 dead transitions. [2023-11-19 07:42:46,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 55 transitions, 272 flow [2023-11-19 07:42:46,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-19 07:42:46,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-19 07:42:46,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1997 transitions. [2023-11-19 07:42:46,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44856244384546273 [2023-11-19 07:42:46,592 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1997 transitions. [2023-11-19 07:42:46,592 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1997 transitions. [2023-11-19 07:42:46,594 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:42:46,594 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1997 transitions. [2023-11-19 07:42:46,600 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 166.41666666666666) internal successors, (1997), 12 states have internal predecessors, (1997), 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 07:42:46,611 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 371.0) internal successors, (4823), 13 states have internal predecessors, (4823), 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 07:42:46,613 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 371.0) internal successors, (4823), 13 states have internal predecessors, (4823), 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 07:42:46,613 INFO L175 Difference]: Start difference. First operand has 56 places, 49 transitions, 142 flow. Second operand 12 states and 1997 transitions. [2023-11-19 07:42:46,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 55 transitions, 272 flow [2023-11-19 07:42:46,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 55 transitions, 258 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-11-19 07:42:46,617 INFO L231 Difference]: Finished difference. Result has 72 places, 55 transitions, 212 flow [2023-11-19 07:42:46,618 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=371, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=212, PETRI_PLACES=72, PETRI_TRANSITIONS=55} [2023-11-19 07:42:46,618 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 27 predicate places. [2023-11-19 07:42:46,618 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 55 transitions, 212 flow [2023-11-19 07:42:46,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 163.30769230769232) internal successors, (2123), 13 states have internal predecessors, (2123), 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 07:42:46,620 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:42:46,620 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1] [2023-11-19 07:42:46,645 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_032276d8-f5e2-4d2c-ae28-5f0275b41bbe/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 07:42:46,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_032276d8-f5e2-4d2c-ae28-5f0275b41bbe/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:42:46,835 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-19 07:42:46,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:42:46,835 INFO L85 PathProgramCache]: Analyzing trace with hash -1461658968, now seen corresponding path program 3 times [2023-11-19 07:42:46,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:42:46,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440859926] [2023-11-19 07:42:46,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:42:46,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:42:46,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:42:46,900 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 07:42:46,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:42:46,961 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 07:42:46,962 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-19 07:42:46,964 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-11-19 07:42:46,967 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-11-19 07:42:46,968 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-11-19 07:42:46,968 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-11-19 07:42:46,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 07:42:46,969 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1, 1] [2023-11-19 07:42:46,972 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-19 07:42:46,972 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-19 07:42:47,027 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-19 07:42:47,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 234 places, 274 transitions, 564 flow [2023-11-19 07:42:47,101 INFO L124 PetriNetUnfolderBase]: 75/450 cut-off events. [2023-11-19 07:42:47,101 INFO L125 PetriNetUnfolderBase]: For 6/7 co-relation queries the response was YES. [2023-11-19 07:42:47,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 462 conditions, 450 events. 75/450 cut-off events. For 6/7 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1830 event pairs, 0 based on Foata normal form. 0/366 useless extension candidates. Maximal degree in co-relation 277. Up to 12 conditions per place. [2023-11-19 07:42:47,107 INFO L82 GeneralOperation]: Start removeDead. Operand has 234 places, 274 transitions, 564 flow [2023-11-19 07:42:47,113 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 234 places, 274 transitions, 564 flow [2023-11-19 07:42:47,113 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:42:47,114 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 234 places, 274 transitions, 564 flow [2023-11-19 07:42:47,114 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 234 places, 274 transitions, 564 flow [2023-11-19 07:42:47,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 234 places, 274 transitions, 564 flow [2023-11-19 07:42:47,185 INFO L124 PetriNetUnfolderBase]: 75/450 cut-off events. [2023-11-19 07:42:47,185 INFO L125 PetriNetUnfolderBase]: For 6/7 co-relation queries the response was YES. [2023-11-19 07:42:47,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 462 conditions, 450 events. 75/450 cut-off events. For 6/7 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1830 event pairs, 0 based on Foata normal form. 0/366 useless extension candidates. Maximal degree in co-relation 277. Up to 12 conditions per place. [2023-11-19 07:42:47,223 INFO L119 LiptonReduction]: Number of co-enabled transitions 35280 [2023-11-19 07:42:51,464 INFO L134 LiptonReduction]: Checked pairs total: 57679 [2023-11-19 07:42:51,464 INFO L136 LiptonReduction]: Total number of compositions: 233 [2023-11-19 07:42:51,466 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:42:51,468 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;@d9d97b1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:42:51,468 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-19 07:42:51,471 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:42:51,471 INFO L124 PetriNetUnfolderBase]: 4/21 cut-off events. [2023-11-19 07:42:51,472 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:42:51,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:42:51,472 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-19 07:42:51,473 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-19 07:42:51,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:42:51,474 INFO L85 PathProgramCache]: Analyzing trace with hash 2130735075, now seen corresponding path program 1 times [2023-11-19 07:42:51,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:42:51,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783654481] [2023-11-19 07:42:51,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:42:51,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:42:51,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:51,528 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 07:42:51,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:42:51,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783654481] [2023-11-19 07:42:51,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783654481] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:42:51,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:42:51,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:42:51,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510832666] [2023-11-19 07:42:51,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:42:51,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:42:51,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:42:51,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:42:51,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:42:51,542 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 507 [2023-11-19 07:42:51,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 101 transitions, 218 flow. Second operand has 3 states, 3 states have (on average 224.0) internal successors, (672), 3 states have internal predecessors, (672), 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 07:42:51,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:42:51,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 507 [2023-11-19 07:42:51,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:42:53,581 INFO L124 PetriNetUnfolderBase]: 9849/15756 cut-off events. [2023-11-19 07:42:53,581 INFO L125 PetriNetUnfolderBase]: For 109/109 co-relation queries the response was YES. [2023-11-19 07:42:53,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30192 conditions, 15756 events. 9849/15756 cut-off events. For 109/109 co-relation queries the response was YES. Maximal size of possible extension queue 514. Compared 104646 event pairs, 9112 based on Foata normal form. 2729/16053 useless extension candidates. Maximal degree in co-relation 12153. Up to 14349 conditions per place. [2023-11-19 07:42:53,693 INFO L140 encePairwiseOnDemand]: 472/507 looper letters, 55 selfloop transitions, 2 changer transitions 0/70 dead transitions. [2023-11-19 07:42:53,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 70 transitions, 270 flow [2023-11-19 07:42:53,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:42:53,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:42:53,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 756 transitions. [2023-11-19 07:42:53,698 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4970414201183432 [2023-11-19 07:42:53,698 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 756 transitions. [2023-11-19 07:42:53,698 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 756 transitions. [2023-11-19 07:42:53,699 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:42:53,699 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 756 transitions. [2023-11-19 07:42:53,701 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 252.0) internal successors, (756), 3 states have internal predecessors, (756), 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 07:42:53,705 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 507.0) internal successors, (2028), 4 states have internal predecessors, (2028), 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 07:42:53,706 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 507.0) internal successors, (2028), 4 states have internal predecessors, (2028), 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 07:42:53,707 INFO L175 Difference]: Start difference. First operand has 68 places, 101 transitions, 218 flow. Second operand 3 states and 756 transitions. [2023-11-19 07:42:53,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 70 transitions, 270 flow [2023-11-19 07:42:53,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 70 transitions, 270 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-19 07:42:53,710 INFO L231 Difference]: Finished difference. Result has 71 places, 70 transitions, 166 flow [2023-11-19 07:42:53,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=507, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=166, PETRI_PLACES=71, PETRI_TRANSITIONS=70} [2023-11-19 07:42:53,714 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 3 predicate places. [2023-11-19 07:42:53,715 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 70 transitions, 166 flow [2023-11-19 07:42:53,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 224.0) internal successors, (672), 3 states have internal predecessors, (672), 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 07:42:53,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:42:53,716 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:42:53,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 07:42:53,716 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-19 07:42:53,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:42:53,717 INFO L85 PathProgramCache]: Analyzing trace with hash 959240680, now seen corresponding path program 1 times [2023-11-19 07:42:53,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:42:53,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361674091] [2023-11-19 07:42:53,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:42:53,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:42:53,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:53,780 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:42:53,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:42:53,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361674091] [2023-11-19 07:42:53,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361674091] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:42:53,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377221656] [2023-11-19 07:42:53,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:42:53,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:42:53,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_032276d8-f5e2-4d2c-ae28-5f0275b41bbe/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:42:53,783 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_032276d8-f5e2-4d2c-ae28-5f0275b41bbe/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:42:53,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_032276d8-f5e2-4d2c-ae28-5f0275b41bbe/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 07:42:53,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:53,873 INFO L262 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 07:42:53,874 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:42:53,886 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:42:53,886 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:42:53,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377221656] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:42:53,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:42:53,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-11-19 07:42:53,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766935650] [2023-11-19 07:42:53,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:42:53,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:42:53,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:42:53,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:42:53,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:42:53,902 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 507 [2023-11-19 07:42:53,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 70 transitions, 166 flow. Second operand has 3 states, 3 states have (on average 224.33333333333334) internal successors, (673), 3 states have internal predecessors, (673), 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 07:42:53,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:42:53,903 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 507 [2023-11-19 07:42:53,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:42:55,874 INFO L124 PetriNetUnfolderBase]: 9675/15650 cut-off events. [2023-11-19 07:42:55,874 INFO L125 PetriNetUnfolderBase]: For 79/79 co-relation queries the response was YES. [2023-11-19 07:42:55,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30078 conditions, 15650 events. 9675/15650 cut-off events. For 79/79 co-relation queries the response was YES. Maximal size of possible extension queue 515. Compared 106695 event pairs, 4312 based on Foata normal form. 0/13238 useless extension candidates. Maximal degree in co-relation 30065. Up to 14317 conditions per place. [2023-11-19 07:42:55,972 INFO L140 encePairwiseOnDemand]: 504/507 looper letters, 72 selfloop transitions, 2 changer transitions 0/87 dead transitions. [2023-11-19 07:42:55,973 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 87 transitions, 348 flow [2023-11-19 07:42:55,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:42:55,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:42:55,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 740 transitions. [2023-11-19 07:42:55,976 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48652202498356345 [2023-11-19 07:42:55,976 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 740 transitions. [2023-11-19 07:42:55,976 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 740 transitions. [2023-11-19 07:42:55,977 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:42:55,977 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 740 transitions. [2023-11-19 07:42:55,979 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 246.66666666666666) internal successors, (740), 3 states have internal predecessors, (740), 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 07:42:55,983 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 507.0) internal successors, (2028), 4 states have internal predecessors, (2028), 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 07:42:55,984 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 507.0) internal successors, (2028), 4 states have internal predecessors, (2028), 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 07:42:55,984 INFO L175 Difference]: Start difference. First operand has 71 places, 70 transitions, 166 flow. Second operand 3 states and 740 transitions. [2023-11-19 07:42:55,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 87 transitions, 348 flow [2023-11-19 07:42:55,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 87 transitions, 344 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-19 07:42:55,988 INFO L231 Difference]: Finished difference. Result has 73 places, 71 transitions, 174 flow [2023-11-19 07:42:55,988 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=507, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=174, PETRI_PLACES=73, PETRI_TRANSITIONS=71} [2023-11-19 07:42:55,989 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 5 predicate places. [2023-11-19 07:42:55,989 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 71 transitions, 174 flow [2023-11-19 07:42:55,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 224.33333333333334) internal successors, (673), 3 states have internal predecessors, (673), 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 07:42:55,989 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:42:55,990 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:42:56,020 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_032276d8-f5e2-4d2c-ae28-5f0275b41bbe/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 07:42:56,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_032276d8-f5e2-4d2c-ae28-5f0275b41bbe/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-19 07:42:56,203 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-19 07:42:56,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:42:56,203 INFO L85 PathProgramCache]: Analyzing trace with hash 1731787309, now seen corresponding path program 1 times [2023-11-19 07:42:56,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:42:56,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567281178] [2023-11-19 07:42:56,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:42:56,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:42:56,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:56,275 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:42:56,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:42:56,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567281178] [2023-11-19 07:42:56,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567281178] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:42:56,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891308168] [2023-11-19 07:42:56,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:42:56,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:42:56,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_032276d8-f5e2-4d2c-ae28-5f0275b41bbe/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:42:56,282 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_032276d8-f5e2-4d2c-ae28-5f0275b41bbe/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:42:56,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_032276d8-f5e2-4d2c-ae28-5f0275b41bbe/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 07:42:56,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:56,373 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 07:42:56,374 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:42:56,384 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:42:56,384 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:42:56,398 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:42:56,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891308168] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:42:56,399 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:42:56,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-19 07:42:56,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882849199] [2023-11-19 07:42:56,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:42:56,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 07:42:56,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:42:56,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 07:42:56,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-19 07:42:56,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 221 out of 507 [2023-11-19 07:42:56,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 71 transitions, 174 flow. Second operand has 7 states, 7 states have (on average 223.0) internal successors, (1561), 7 states have internal predecessors, (1561), 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 07:42:56,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:42:56,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 221 of 507 [2023-11-19 07:42:56,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:42:58,294 INFO L124 PetriNetUnfolderBase]: 9912/15619 cut-off events. [2023-11-19 07:42:58,294 INFO L125 PetriNetUnfolderBase]: For 612/612 co-relation queries the response was YES. [2023-11-19 07:42:58,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30581 conditions, 15619 events. 9912/15619 cut-off events. For 612/612 co-relation queries the response was YES. Maximal size of possible extension queue 512. Compared 101695 event pairs, 9112 based on Foata normal form. 3/13422 useless extension candidates. Maximal degree in co-relation 30553. Up to 14334 conditions per place. [2023-11-19 07:42:58,391 INFO L140 encePairwiseOnDemand]: 504/507 looper letters, 56 selfloop transitions, 5 changer transitions 0/74 dead transitions. [2023-11-19 07:42:58,392 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 74 transitions, 308 flow [2023-11-19 07:42:58,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:42:58,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-19 07:42:58,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1389 transitions. [2023-11-19 07:42:58,398 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45660749506903353 [2023-11-19 07:42:58,398 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1389 transitions. [2023-11-19 07:42:58,398 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1389 transitions. [2023-11-19 07:42:58,400 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:42:58,400 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1389 transitions. [2023-11-19 07:42:58,404 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 231.5) internal successors, (1389), 6 states have internal predecessors, (1389), 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 07:42:58,411 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 507.0) internal successors, (3549), 7 states have internal predecessors, (3549), 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 07:42:58,413 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 507.0) internal successors, (3549), 7 states have internal predecessors, (3549), 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 07:42:58,413 INFO L175 Difference]: Start difference. First operand has 73 places, 71 transitions, 174 flow. Second operand 6 states and 1389 transitions. [2023-11-19 07:42:58,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 74 transitions, 308 flow [2023-11-19 07:42:58,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 74 transitions, 306 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:42:58,420 INFO L231 Difference]: Finished difference. Result has 80 places, 74 transitions, 208 flow [2023-11-19 07:42:58,421 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=507, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=208, PETRI_PLACES=80, PETRI_TRANSITIONS=74} [2023-11-19 07:42:58,423 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 12 predicate places. [2023-11-19 07:42:58,423 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 74 transitions, 208 flow [2023-11-19 07:42:58,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 223.0) internal successors, (1561), 7 states have internal predecessors, (1561), 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 07:42:58,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:42:58,425 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:42:58,453 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_032276d8-f5e2-4d2c-ae28-5f0275b41bbe/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 07:42:58,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_032276d8-f5e2-4d2c-ae28-5f0275b41bbe/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-19 07:42:58,652 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-19 07:42:58,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:42:58,653 INFO L85 PathProgramCache]: Analyzing trace with hash -478509400, now seen corresponding path program 2 times [2023-11-19 07:42:58,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:42:58,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607002214] [2023-11-19 07:42:58,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:42:58,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:42:58,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:58,791 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:42:58,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:42:58,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607002214] [2023-11-19 07:42:58,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607002214] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:42:58,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962011300] [2023-11-19 07:42:58,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:42:58,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:42:58,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_032276d8-f5e2-4d2c-ae28-5f0275b41bbe/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:42:58,795 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_032276d8-f5e2-4d2c-ae28-5f0275b41bbe/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:42:58,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_032276d8-f5e2-4d2c-ae28-5f0275b41bbe/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 07:42:58,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-19 07:42:58,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:42:58,894 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-19 07:42:58,896 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:42:58,928 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2023-11-19 07:42:58,985 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-19 07:42:58,985 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-19 07:42:59,012 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 10 [2023-11-19 07:42:59,040 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-19 07:42:59,040 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:42:59,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962011300] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:42:59,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:42:59,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 9 [2023-11-19 07:42:59,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316858354] [2023-11-19 07:42:59,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:42:59,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:42:59,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:42:59,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:42:59,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2023-11-19 07:42:59,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 507 [2023-11-19 07:42:59,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 74 transitions, 208 flow. Second operand has 5 states, 5 states have (on average 216.8) internal successors, (1084), 5 states have internal predecessors, (1084), 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 07:42:59,191 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:42:59,191 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 507 [2023-11-19 07:42:59,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:43:01,334 INFO L124 PetriNetUnfolderBase]: 9983/16176 cut-off events. [2023-11-19 07:43:01,334 INFO L125 PetriNetUnfolderBase]: For 639/639 co-relation queries the response was YES. [2023-11-19 07:43:01,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31874 conditions, 16176 events. 9983/16176 cut-off events. For 639/639 co-relation queries the response was YES. Maximal size of possible extension queue 564. Compared 111009 event pairs, 3664 based on Foata normal form. 0/14214 useless extension candidates. Maximal degree in co-relation 31838. Up to 11885 conditions per place. [2023-11-19 07:43:01,615 INFO L140 encePairwiseOnDemand]: 498/507 looper letters, 98 selfloop transitions, 8 changer transitions 9/128 dead transitions. [2023-11-19 07:43:01,615 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 128 transitions, 563 flow [2023-11-19 07:43:01,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:43:01,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 07:43:01,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 974 transitions. [2023-11-19 07:43:01,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.480276134122288 [2023-11-19 07:43:01,621 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 974 transitions. [2023-11-19 07:43:01,621 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 974 transitions. [2023-11-19 07:43:01,622 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:43:01,623 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 974 transitions. [2023-11-19 07:43:01,626 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 243.5) internal successors, (974), 4 states have internal predecessors, (974), 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 07:43:01,630 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 507.0) internal successors, (2535), 5 states have internal predecessors, (2535), 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 07:43:01,632 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 507.0) internal successors, (2535), 5 states have internal predecessors, (2535), 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 07:43:01,632 INFO L175 Difference]: Start difference. First operand has 80 places, 74 transitions, 208 flow. Second operand 4 states and 974 transitions. [2023-11-19 07:43:01,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 128 transitions, 563 flow [2023-11-19 07:43:01,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 128 transitions, 549 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-11-19 07:43:01,643 INFO L231 Difference]: Finished difference. Result has 84 places, 80 transitions, 250 flow [2023-11-19 07:43:01,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=507, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=250, PETRI_PLACES=84, PETRI_TRANSITIONS=80} [2023-11-19 07:43:01,645 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 16 predicate places. [2023-11-19 07:43:01,645 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 80 transitions, 250 flow [2023-11-19 07:43:01,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 216.8) internal successors, (1084), 5 states have internal predecessors, (1084), 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 07:43:01,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:43:01,646 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1] [2023-11-19 07:43:01,668 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_032276d8-f5e2-4d2c-ae28-5f0275b41bbe/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 07:43:01,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_032276d8-f5e2-4d2c-ae28-5f0275b41bbe/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:43:01,863 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-19 07:43:01,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:43:01,863 INFO L85 PathProgramCache]: Analyzing trace with hash 859011496, now seen corresponding path program 1 times [2023-11-19 07:43:01,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:43:01,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737448270] [2023-11-19 07:43:01,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:43:01,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:43:01,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:43:01,960 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-19 07:43:01,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:43:01,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737448270] [2023-11-19 07:43:01,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737448270] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:43:01,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838132661] [2023-11-19 07:43:01,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:43:01,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:43:01,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_032276d8-f5e2-4d2c-ae28-5f0275b41bbe/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:43:01,963 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_032276d8-f5e2-4d2c-ae28-5f0275b41bbe/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:43:01,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_032276d8-f5e2-4d2c-ae28-5f0275b41bbe/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 07:43:02,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:43:02,071 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:43:02,073 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:43:02,093 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-19 07:43:02,094 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:43:02,153 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-19 07:43:02,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838132661] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:43:02,154 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:43:02,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-19 07:43:02,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071607527] [2023-11-19 07:43:02,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:43:02,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-19 07:43:02,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:43:02,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-19 07:43:02,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-19 07:43:02,203 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 221 out of 507 [2023-11-19 07:43:02,208 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 80 transitions, 250 flow. Second operand has 13 states, 13 states have (on average 222.3846153846154) internal successors, (2891), 13 states have internal predecessors, (2891), 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 07:43:02,208 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:43:02,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 221 of 507 [2023-11-19 07:43:02,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:43:04,170 INFO L124 PetriNetUnfolderBase]: 9981/16205 cut-off events. [2023-11-19 07:43:04,170 INFO L125 PetriNetUnfolderBase]: For 3039/3044 co-relation queries the response was YES. [2023-11-19 07:43:04,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34683 conditions, 16205 events. 9981/16205 cut-off events. For 3039/3044 co-relation queries the response was YES. Maximal size of possible extension queue 565. Compared 111420 event pairs, 8984 based on Foata normal form. 6/15179 useless extension candidates. Maximal degree in co-relation 34626. Up to 15056 conditions per place. [2023-11-19 07:43:04,267 INFO L140 encePairwiseOnDemand]: 504/507 looper letters, 62 selfloop transitions, 11 changer transitions 0/86 dead transitions. [2023-11-19 07:43:04,268 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 86 transitions, 432 flow [2023-11-19 07:43:04,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-19 07:43:04,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-19 07:43:04,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2724 transitions. [2023-11-19 07:43:04,281 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4477317554240631 [2023-11-19 07:43:04,281 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2724 transitions. [2023-11-19 07:43:04,281 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2724 transitions. [2023-11-19 07:43:04,284 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:43:04,284 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2724 transitions. [2023-11-19 07:43:04,293 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 227.0) internal successors, (2724), 12 states have internal predecessors, (2724), 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 07:43:04,307 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 507.0) internal successors, (6591), 13 states have internal predecessors, (6591), 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 07:43:04,310 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 507.0) internal successors, (6591), 13 states have internal predecessors, (6591), 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 07:43:04,311 INFO L175 Difference]: Start difference. First operand has 84 places, 80 transitions, 250 flow. Second operand 12 states and 2724 transitions. [2023-11-19 07:43:04,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 86 transitions, 432 flow [2023-11-19 07:43:04,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 86 transitions, 432 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-19 07:43:04,322 INFO L231 Difference]: Finished difference. Result has 101 places, 86 transitions, 334 flow [2023-11-19 07:43:04,323 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=507, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=334, PETRI_PLACES=101, PETRI_TRANSITIONS=86} [2023-11-19 07:43:04,324 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 33 predicate places. [2023-11-19 07:43:04,324 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 86 transitions, 334 flow [2023-11-19 07:43:04,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 222.3846153846154) internal successors, (2891), 13 states have internal predecessors, (2891), 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 07:43:04,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:43:04,346 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 3, 2, 2, 1, 1, 1, 1, 1] [2023-11-19 07:43:04,379 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_032276d8-f5e2-4d2c-ae28-5f0275b41bbe/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-19 07:43:04,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_032276d8-f5e2-4d2c-ae28-5f0275b41bbe/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-19 07:43:04,563 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-19 07:43:04,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:43:04,563 INFO L85 PathProgramCache]: Analyzing trace with hash 607218568, now seen corresponding path program 2 times [2023-11-19 07:43:04,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:43:04,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407273994] [2023-11-19 07:43:04,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:43:04,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:43:04,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:43:04,603 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 07:43:04,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:43:04,642 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 07:43:04,643 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-19 07:43:04,643 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-11-19 07:43:04,643 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-11-19 07:43:04,644 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-11-19 07:43:04,644 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-11-19 07:43:04,644 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-11-19 07:43:04,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-19 07:43:04,645 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1] [2023-11-19 07:43:04,646 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-19 07:43:04,647 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-19 07:43:04,706 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-19 07:43:04,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 296 places, 348 transitions, 723 flow [2023-11-19 07:43:04,855 INFO L124 PetriNetUnfolderBase]: 110/660 cut-off events. [2023-11-19 07:43:04,856 INFO L125 PetriNetUnfolderBase]: For 19/21 co-relation queries the response was YES. [2023-11-19 07:43:04,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 685 conditions, 660 events. 110/660 cut-off events. For 19/21 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2951 event pairs, 1 based on Foata normal form. 0/539 useless extension candidates. Maximal degree in co-relation 458. Up to 16 conditions per place. [2023-11-19 07:43:04,869 INFO L82 GeneralOperation]: Start removeDead. Operand has 296 places, 348 transitions, 723 flow [2023-11-19 07:43:04,878 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 296 places, 348 transitions, 723 flow [2023-11-19 07:43:04,879 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:43:04,879 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 296 places, 348 transitions, 723 flow [2023-11-19 07:43:04,879 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 296 places, 348 transitions, 723 flow [2023-11-19 07:43:04,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 296 places, 348 transitions, 723 flow [2023-11-19 07:43:05,252 INFO L124 PetriNetUnfolderBase]: 110/660 cut-off events. [2023-11-19 07:43:05,253 INFO L125 PetriNetUnfolderBase]: For 19/21 co-relation queries the response was YES. [2023-11-19 07:43:05,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 685 conditions, 660 events. 110/660 cut-off events. For 19/21 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2951 event pairs, 1 based on Foata normal form. 0/539 useless extension candidates. Maximal degree in co-relation 458. Up to 16 conditions per place. [2023-11-19 07:43:05,303 INFO L119 LiptonReduction]: Number of co-enabled transitions 69120 [2023-11-19 07:43:10,661 INFO L134 LiptonReduction]: Checked pairs total: 119475 [2023-11-19 07:43:10,661 INFO L136 LiptonReduction]: Total number of compositions: 290 [2023-11-19 07:43:10,664 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:43:10,664 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;@d9d97b1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:43:10,664 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-11-19 07:43:10,668 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:43:10,668 INFO L124 PetriNetUnfolderBase]: 5/24 cut-off events. [2023-11-19 07:43:10,669 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:43:10,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:43:10,669 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-19 07:43:10,669 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-19 07:43:10,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:43:10,670 INFO L85 PathProgramCache]: Analyzing trace with hash 1722029927, now seen corresponding path program 1 times [2023-11-19 07:43:10,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:43:10,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906860723] [2023-11-19 07:43:10,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:43:10,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:43:10,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:43:10,698 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 07:43:10,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:43:10,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906860723] [2023-11-19 07:43:10,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906860723] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:43:10,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:43:10,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:43:10,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732656558] [2023-11-19 07:43:10,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:43:10,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:43:10,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:43:10,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:43:10,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:43:10,716 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 281 out of 638 [2023-11-19 07:43:10,718 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 129 transitions, 285 flow. Second operand has 3 states, 3 states have (on average 283.0) internal successors, (849), 3 states have internal predecessors, (849), 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 07:43:10,718 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:43:10,718 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 281 of 638 [2023-11-19 07:43:10,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand