./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-deagle/floating_read-5.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b1b864e-3deb-4a83-bd03-4f8a9dcb3dd5/bin/uautomizer-AkOaLMaTGY/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b1b864e-3deb-4a83-bd03-4f8a9dcb3dd5/bin/uautomizer-AkOaLMaTGY/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b1b864e-3deb-4a83-bd03-4f8a9dcb3dd5/bin/uautomizer-AkOaLMaTGY/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b1b864e-3deb-4a83-bd03-4f8a9dcb3dd5/bin/uautomizer-AkOaLMaTGY/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-deagle/floating_read-5.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b1b864e-3deb-4a83-bd03-4f8a9dcb3dd5/bin/uautomizer-AkOaLMaTGY/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b1b864e-3deb-4a83-bd03-4f8a9dcb3dd5/bin/uautomizer-AkOaLMaTGY --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2f28efd84e1dbcbcea7683bca483f8f3b9fbdd333eb36f517b9f12d5bccb885d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 08:37:56,244 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 08:37:56,247 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 08:37:56,305 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 08:37:56,306 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 08:37:56,311 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 08:37:56,314 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 08:37:56,319 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 08:37:56,322 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 08:37:56,328 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 08:37:56,329 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 08:37:56,331 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 08:37:56,331 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 08:37:56,334 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 08:37:56,337 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 08:37:56,339 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 08:37:56,341 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 08:37:56,342 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 08:37:56,348 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 08:37:56,358 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 08:37:56,360 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 08:37:56,361 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 08:37:56,365 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 08:37:56,366 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 08:37:56,370 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 08:37:56,370 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 08:37:56,370 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 08:37:56,373 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 08:37:56,373 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 08:37:56,375 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 08:37:56,375 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 08:37:56,376 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 08:37:56,378 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 08:37:56,379 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 08:37:56,381 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 08:37:56,381 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 08:37:56,382 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 08:37:56,382 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 08:37:56,382 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 08:37:56,383 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 08:37:56,384 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 08:37:56,385 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b1b864e-3deb-4a83-bd03-4f8a9dcb3dd5/bin/uautomizer-AkOaLMaTGY/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-07 08:37:56,430 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 08:37:56,430 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 08:37:56,431 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-07 08:37:56,431 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-07 08:37:56,439 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 08:37:56,439 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 08:37:56,439 INFO L138 SettingsManager]: * Use SBE=true [2021-11-07 08:37:56,439 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 08:37:56,439 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 08:37:56,440 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 08:37:56,441 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 08:37:56,441 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 08:37:56,441 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 08:37:56,441 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 08:37:56,441 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 08:37:56,442 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 08:37:56,442 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 08:37:56,442 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 08:37:56,442 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 08:37:56,442 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 08:37:56,443 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 08:37:56,443 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 08:37:56,443 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 08:37:56,443 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 08:37:56,443 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 08:37:56,444 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 08:37:56,444 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-07 08:37:56,444 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 08:37:56,444 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-07 08:37:56,444 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-07 08:37:56,444 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 08:37:56,445 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 08:37:56,445 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b1b864e-3deb-4a83-bd03-4f8a9dcb3dd5/bin/uautomizer-AkOaLMaTGY/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b1b864e-3deb-4a83-bd03-4f8a9dcb3dd5/bin/uautomizer-AkOaLMaTGY Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2f28efd84e1dbcbcea7683bca483f8f3b9fbdd333eb36f517b9f12d5bccb885d [2021-11-07 08:37:56,755 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 08:37:56,778 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 08:37:56,781 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 08:37:56,782 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 08:37:56,783 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 08:37:56,784 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b1b864e-3deb-4a83-bd03-4f8a9dcb3dd5/bin/uautomizer-AkOaLMaTGY/../../sv-benchmarks/c/pthread-deagle/floating_read-5.i [2021-11-07 08:37:56,851 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b1b864e-3deb-4a83-bd03-4f8a9dcb3dd5/bin/uautomizer-AkOaLMaTGY/data/fa91cff87/7fb0aa97bbe1406f95a44215ba9e3f33/FLAGfa8bbb85d [2021-11-07 08:37:57,400 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 08:37:57,401 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b1b864e-3deb-4a83-bd03-4f8a9dcb3dd5/sv-benchmarks/c/pthread-deagle/floating_read-5.i [2021-11-07 08:37:57,418 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b1b864e-3deb-4a83-bd03-4f8a9dcb3dd5/bin/uautomizer-AkOaLMaTGY/data/fa91cff87/7fb0aa97bbe1406f95a44215ba9e3f33/FLAGfa8bbb85d [2021-11-07 08:37:57,693 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b1b864e-3deb-4a83-bd03-4f8a9dcb3dd5/bin/uautomizer-AkOaLMaTGY/data/fa91cff87/7fb0aa97bbe1406f95a44215ba9e3f33 [2021-11-07 08:37:57,696 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 08:37:57,697 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 08:37:57,706 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 08:37:57,706 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 08:37:57,710 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 08:37:57,711 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:37:57" (1/1) ... [2021-11-07 08:37:57,712 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ad42261 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:37:57, skipping insertion in model container [2021-11-07 08:37:57,715 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:37:57" (1/1) ... [2021-11-07 08:37:57,722 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 08:37:57,786 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 08:37:58,127 WARN L1529 CHandler]: Possible shadowing of function thread [2021-11-07 08:37:58,144 WARN L228 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_1b1b864e-3deb-4a83-bd03-4f8a9dcb3dd5/sv-benchmarks/c/pthread-deagle/floating_read-5.i[31193,31206] [2021-11-07 08:37:58,152 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 08:37:58,160 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 08:37:58,211 WARN L1529 CHandler]: Possible shadowing of function thread [2021-11-07 08:37:58,222 WARN L228 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_1b1b864e-3deb-4a83-bd03-4f8a9dcb3dd5/sv-benchmarks/c/pthread-deagle/floating_read-5.i[31193,31206] [2021-11-07 08:37:58,224 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 08:37:58,259 INFO L208 MainTranslator]: Completed translation [2021-11-07 08:37:58,259 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:37:58 WrapperNode [2021-11-07 08:37:58,259 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 08:37:58,260 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 08:37:58,260 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 08:37:58,261 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 08:37:58,268 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:37:58" (1/1) ... [2021-11-07 08:37:58,282 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:37:58" (1/1) ... [2021-11-07 08:37:58,302 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 08:37:58,303 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 08:37:58,303 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 08:37:58,303 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 08:37:58,311 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:37:58" (1/1) ... [2021-11-07 08:37:58,312 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:37:58" (1/1) ... [2021-11-07 08:37:58,315 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:37:58" (1/1) ... [2021-11-07 08:37:58,315 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:37:58" (1/1) ... [2021-11-07 08:37:58,322 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:37:58" (1/1) ... [2021-11-07 08:37:58,326 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:37:58" (1/1) ... [2021-11-07 08:37:58,327 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:37:58" (1/1) ... [2021-11-07 08:37:58,330 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 08:37:58,331 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 08:37:58,331 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 08:37:58,332 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 08:37:58,338 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:37:58" (1/1) ... [2021-11-07 08:37:58,354 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 08:37:58,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b1b864e-3deb-4a83-bd03-4f8a9dcb3dd5/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:37:58,400 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b1b864e-3deb-4a83-bd03-4f8a9dcb3dd5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 08:37:58,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b1b864e-3deb-4a83-bd03-4f8a9dcb3dd5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 08:37:58,442 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-07 08:37:58,443 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-07 08:37:58,443 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-11-07 08:37:58,443 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 08:37:58,443 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 08:37:58,444 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 08:37:58,444 INFO L130 BoogieDeclarations]: Found specification of procedure thread [2021-11-07 08:37:58,444 INFO L138 BoogieDeclarations]: Found implementation of procedure thread [2021-11-07 08:37:58,444 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-11-07 08:37:58,445 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 08:37:58,446 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 08:37:58,447 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-11-07 08:37:58,769 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 08:37:58,769 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-11-07 08:37:58,771 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:37:58 BoogieIcfgContainer [2021-11-07 08:37:58,771 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 08:37:58,773 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 08:37:58,773 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 08:37:58,776 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 08:37:58,777 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 08:37:57" (1/3) ... [2021-11-07 08:37:58,777 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40dabc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:37:58, skipping insertion in model container [2021-11-07 08:37:58,778 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:37:58" (2/3) ... [2021-11-07 08:37:58,778 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40dabc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:37:58, skipping insertion in model container [2021-11-07 08:37:58,778 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:37:58" (3/3) ... [2021-11-07 08:37:58,780 INFO L111 eAbstractionObserver]: Analyzing ICFG floating_read-5.i [2021-11-07 08:37:58,785 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-11-07 08:37:58,785 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 08:37:58,785 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 08:37:58,786 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-11-07 08:37:58,808 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:37:58,809 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:37:58,809 WARN L322 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:37:58,809 WARN L322 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:37:58,809 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:37:58,809 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:37:58,810 WARN L322 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:37:58,810 WARN L322 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:37:58,810 WARN L322 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:37:58,810 WARN L322 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:37:58,811 WARN L322 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:37:58,811 WARN L322 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:37:58,811 WARN L322 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:37:58,811 WARN L322 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:37:58,811 WARN L322 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:37:58,812 WARN L322 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:37:58,812 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:37:58,812 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:37:58,812 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:37:58,813 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:37:58,816 WARN L322 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:37:58,816 WARN L322 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:37:58,816 WARN L322 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:37:58,817 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:37:58,817 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:37:58,824 INFO L148 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2021-11-07 08:37:58,873 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 08:37:58,879 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 08:37:58,879 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-07 08:37:58,891 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 54 places, 55 transitions, 118 flow [2021-11-07 08:37:58,931 INFO L129 PetriNetUnfolder]: 7/76 cut-off events. [2021-11-07 08:37:58,931 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2021-11-07 08:37:58,934 INFO L84 FinitePrefix]: Finished finitePrefix Result has 82 conditions, 76 events. 7/76 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 101 event pairs, 0 based on Foata normal form. 0/64 useless extension candidates. Maximal degree in co-relation 38. Up to 4 conditions per place. [2021-11-07 08:37:58,934 INFO L82 GeneralOperation]: Start removeDead. Operand has 54 places, 55 transitions, 118 flow [2021-11-07 08:37:58,938 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 39 places, 37 transitions, 79 flow [2021-11-07 08:37:58,947 INFO L129 PetriNetUnfolder]: 1/23 cut-off events. [2021-11-07 08:37:58,947 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-11-07 08:37:58,947 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 08:37:58,948 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:37:58,948 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-11-07 08:37:58,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:37:58,954 INFO L85 PathProgramCache]: Analyzing trace with hash -1912388019, now seen corresponding path program 1 times [2021-11-07 08:37:58,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:37:58,963 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642652400] [2021-11-07 08:37:58,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:37:58,964 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:37:59,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:37:59,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:37:59,162 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:37:59,162 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642652400] [2021-11-07 08:37:59,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642652400] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:37:59,163 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:37:59,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 08:37:59,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830849399] [2021-11-07 08:37:59,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 08:37:59,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:37:59,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 08:37:59,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 08:37:59,190 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 55 [2021-11-07 08:37:59,193 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 37 transitions, 79 flow. Second operand has 2 states, 2 states have (on average 51.5) internal successors, (103), 2 states have internal predecessors, (103), 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) [2021-11-07 08:37:59,193 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 08:37:59,194 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 55 [2021-11-07 08:37:59,195 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 08:37:59,210 INFO L129 PetriNetUnfolder]: 0/43 cut-off events. [2021-11-07 08:37:59,211 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-11-07 08:37:59,211 INFO L84 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 43 events. 0/43 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 23 event pairs, 0 based on Foata normal form. 2/43 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-11-07 08:37:59,212 INFO L132 encePairwiseOnDemand]: 54/55 looper letters, 0 selfloop transitions, 0 changer transitions 0/36 dead transitions. [2021-11-07 08:37:59,213 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 36 transitions, 77 flow [2021-11-07 08:37:59,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 08:37:59,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-11-07 08:37:59,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 103 transitions. [2021-11-07 08:37:59,224 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9363636363636364 [2021-11-07 08:37:59,224 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 103 transitions. [2021-11-07 08:37:59,225 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 103 transitions. [2021-11-07 08:37:59,238 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 08:37:59,240 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 103 transitions. [2021-11-07 08:37:59,243 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 51.5) internal successors, (103), 2 states have internal predecessors, (103), 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) [2021-11-07 08:37:59,247 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 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) [2021-11-07 08:37:59,248 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 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) [2021-11-07 08:37:59,250 INFO L186 Difference]: Start difference. First operand has 39 places, 37 transitions, 79 flow. Second operand 2 states and 103 transitions. [2021-11-07 08:37:59,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 36 transitions, 77 flow [2021-11-07 08:37:59,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 36 transitions, 77 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-11-07 08:37:59,256 INFO L242 Difference]: Finished difference. Result has 40 places, 36 transitions, 77 flow [2021-11-07 08:37:59,257 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=77, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=77, PETRI_PLACES=40, PETRI_TRANSITIONS=36} [2021-11-07 08:37:59,258 INFO L334 CegarLoopForPetriNet]: 39 programPoint places, 1 predicate places. [2021-11-07 08:37:59,259 INFO L470 AbstractCegarLoop]: Abstraction has has 40 places, 36 transitions, 77 flow [2021-11-07 08:37:59,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 51.5) internal successors, (103), 2 states have internal predecessors, (103), 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) [2021-11-07 08:37:59,259 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 08:37:59,259 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:37:59,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 08:37:59,260 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-11-07 08:37:59,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:37:59,261 INFO L85 PathProgramCache]: Analyzing trace with hash -1912387058, now seen corresponding path program 1 times [2021-11-07 08:37:59,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:37:59,261 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857859121] [2021-11-07 08:37:59,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:37:59,262 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:37:59,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:37:59,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:37:59,347 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:37:59,348 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857859121] [2021-11-07 08:37:59,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857859121] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:37:59,348 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:37:59,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:37:59,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189227580] [2021-11-07 08:37:59,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:37:59,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:37:59,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:37:59,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:37:59,356 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2021-11-07 08:37:59,356 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 36 transitions, 77 flow. Second operand has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 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) [2021-11-07 08:37:59,356 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 08:37:59,357 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2021-11-07 08:37:59,357 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 08:37:59,386 INFO L129 PetriNetUnfolder]: 0/40 cut-off events. [2021-11-07 08:37:59,386 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-11-07 08:37:59,386 INFO L84 FinitePrefix]: Finished finitePrefix Result has 57 conditions, 40 events. 0/40 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 17 event pairs, 0 based on Foata normal form. 0/39 useless extension candidates. Maximal degree in co-relation 0. Up to 6 conditions per place. [2021-11-07 08:37:59,387 INFO L132 encePairwiseOnDemand]: 52/55 looper letters, 8 selfloop transitions, 2 changer transitions 0/38 dead transitions. [2021-11-07 08:37:59,387 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 38 transitions, 101 flow [2021-11-07 08:37:59,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:37:59,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-11-07 08:37:59,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 140 transitions. [2021-11-07 08:37:59,389 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8484848484848485 [2021-11-07 08:37:59,390 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 140 transitions. [2021-11-07 08:37:59,390 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 140 transitions. [2021-11-07 08:37:59,391 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 08:37:59,391 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 140 transitions. [2021-11-07 08:37:59,392 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 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) [2021-11-07 08:37:59,394 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 55.0) internal successors, (220), 4 states have internal predecessors, (220), 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) [2021-11-07 08:37:59,394 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 55.0) internal successors, (220), 4 states have internal predecessors, (220), 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) [2021-11-07 08:37:59,395 INFO L186 Difference]: Start difference. First operand has 40 places, 36 transitions, 77 flow. Second operand 3 states and 140 transitions. [2021-11-07 08:37:59,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 38 transitions, 101 flow [2021-11-07 08:37:59,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 38 transitions, 101 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-11-07 08:37:59,398 INFO L242 Difference]: Finished difference. Result has 43 places, 36 transitions, 85 flow [2021-11-07 08:37:59,398 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=77, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=85, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2021-11-07 08:37:59,399 INFO L334 CegarLoopForPetriNet]: 39 programPoint places, 4 predicate places. [2021-11-07 08:37:59,399 INFO L470 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 85 flow [2021-11-07 08:37:59,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 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) [2021-11-07 08:37:59,400 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 08:37:59,400 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:37:59,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-07 08:37:59,401 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-11-07 08:37:59,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:37:59,401 INFO L85 PathProgramCache]: Analyzing trace with hash -496952365, now seen corresponding path program 1 times [2021-11-07 08:37:59,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:37:59,402 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30173465] [2021-11-07 08:37:59,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:37:59,402 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:37:59,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:37:59,469 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 08:37:59,470 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:37:59,470 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30173465] [2021-11-07 08:37:59,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30173465] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:37:59,470 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:37:59,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:37:59,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249235541] [2021-11-07 08:37:59,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:37:59,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:37:59,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:37:59,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:37:59,474 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 55 [2021-11-07 08:37:59,475 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 85 flow. Second operand has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 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) [2021-11-07 08:37:59,475 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 08:37:59,475 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 55 [2021-11-07 08:37:59,475 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 08:37:59,503 INFO L129 PetriNetUnfolder]: 0/40 cut-off events. [2021-11-07 08:37:59,503 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2021-11-07 08:37:59,503 INFO L84 FinitePrefix]: Finished finitePrefix Result has 57 conditions, 40 events. 0/40 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 17 event pairs, 0 based on Foata normal form. 1/41 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2021-11-07 08:37:59,504 INFO L132 encePairwiseOnDemand]: 52/55 looper letters, 2 selfloop transitions, 2 changer transitions 0/36 dead transitions. [2021-11-07 08:37:59,504 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 36 transitions, 93 flow [2021-11-07 08:37:59,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:37:59,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-11-07 08:37:59,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 143 transitions. [2021-11-07 08:37:59,507 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8666666666666667 [2021-11-07 08:37:59,507 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 143 transitions. [2021-11-07 08:37:59,507 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 143 transitions. [2021-11-07 08:37:59,508 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 08:37:59,508 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 143 transitions. [2021-11-07 08:37:59,510 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 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) [2021-11-07 08:37:59,511 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 55.0) internal successors, (220), 4 states have internal predecessors, (220), 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) [2021-11-07 08:37:59,512 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 55.0) internal successors, (220), 4 states have internal predecessors, (220), 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) [2021-11-07 08:37:59,512 INFO L186 Difference]: Start difference. First operand has 43 places, 36 transitions, 85 flow. Second operand 3 states and 143 transitions. [2021-11-07 08:37:59,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 36 transitions, 93 flow [2021-11-07 08:37:59,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 36 transitions, 89 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-11-07 08:37:59,515 INFO L242 Difference]: Finished difference. Result has 44 places, 36 transitions, 89 flow [2021-11-07 08:37:59,515 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=81, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=89, PETRI_PLACES=44, PETRI_TRANSITIONS=36} [2021-11-07 08:37:59,516 INFO L334 CegarLoopForPetriNet]: 39 programPoint places, 5 predicate places. [2021-11-07 08:37:59,516 INFO L470 AbstractCegarLoop]: Abstraction has has 44 places, 36 transitions, 89 flow [2021-11-07 08:37:59,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 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) [2021-11-07 08:37:59,516 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 08:37:59,517 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:37:59,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-07 08:37:59,517 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-11-07 08:37:59,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:37:59,518 INFO L85 PathProgramCache]: Analyzing trace with hash -828570952, now seen corresponding path program 1 times [2021-11-07 08:37:59,518 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:37:59,519 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418187280] [2021-11-07 08:37:59,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:37:59,519 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:37:59,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-07 08:37:59,549 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-07 08:37:59,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-07 08:37:59,599 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-07 08:37:59,599 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-11-07 08:37:59,600 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATION [2021-11-07 08:37:59,602 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 08:37:59,602 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-07 08:37:59,606 INFO L731 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2021-11-07 08:37:59,611 WARN L234 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2021-11-07 08:37:59,611 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2021-11-07 08:37:59,623 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of2ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:37:59,623 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of2ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:37:59,624 WARN L322 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:37:59,624 WARN L322 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:37:59,624 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of2ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:37:59,624 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of2ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:37:59,624 WARN L322 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:37:59,624 WARN L322 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:37:59,625 WARN L322 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:37:59,625 WARN L322 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:37:59,625 WARN L322 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:37:59,625 WARN L322 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:37:59,625 WARN L322 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:37:59,625 WARN L322 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:37:59,626 WARN L322 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:37:59,626 WARN L322 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:37:59,626 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of2ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:37:59,626 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of2ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:37:59,626 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of2ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:37:59,626 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of2ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:37:59,627 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of2ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:37:59,627 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of2ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:37:59,627 WARN L322 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:37:59,627 WARN L322 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:37:59,627 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of2ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:37:59,627 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of2ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:37:59,628 WARN L322 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:37:59,628 WARN L322 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:37:59,628 WARN L322 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:37:59,628 WARN L322 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:37:59,628 WARN L322 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:37:59,628 WARN L322 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:37:59,629 WARN L322 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:37:59,629 WARN L322 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:37:59,629 WARN L322 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:37:59,629 WARN L322 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:37:59,629 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of2ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:37:59,629 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of2ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:37:59,630 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of2ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:37:59,630 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of2ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:37:59,630 WARN L322 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:37:59,630 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of2ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:37:59,631 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of2ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:37:59,631 WARN L322 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:37:59,631 WARN L322 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:37:59,636 WARN L322 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:37:59,636 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of2ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:37:59,636 WARN L322 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:37:59,637 WARN L322 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:37:59,637 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of2ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:37:59,643 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-11-07 08:37:59,647 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 08:37:59,648 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 08:37:59,648 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-07 08:37:59,650 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 62 places, 62 transitions, 142 flow [2021-11-07 08:37:59,673 INFO L129 PetriNetUnfolder]: 13/128 cut-off events. [2021-11-07 08:37:59,673 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2021-11-07 08:37:59,675 INFO L84 FinitePrefix]: Finished finitePrefix Result has 142 conditions, 128 events. 13/128 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 223 event pairs, 0 based on Foata normal form. 0/108 useless extension candidates. Maximal degree in co-relation 78. Up to 8 conditions per place. [2021-11-07 08:37:59,675 INFO L82 GeneralOperation]: Start removeDead. Operand has 62 places, 62 transitions, 142 flow [2021-11-07 08:37:59,676 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 47 places, 43 transitions, 98 flow [2021-11-07 08:37:59,681 INFO L129 PetriNetUnfolder]: 1/22 cut-off events. [2021-11-07 08:37:59,681 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-11-07 08:37:59,681 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 08:37:59,681 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:37:59,682 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-11-07 08:37:59,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:37:59,682 INFO L85 PathProgramCache]: Analyzing trace with hash -616601714, now seen corresponding path program 1 times [2021-11-07 08:37:59,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:37:59,683 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982670862] [2021-11-07 08:37:59,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:37:59,683 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:37:59,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:37:59,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:37:59,759 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:37:59,759 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982670862] [2021-11-07 08:37:59,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982670862] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:37:59,760 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:37:59,760 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:37:59,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880682355] [2021-11-07 08:37:59,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:37:59,761 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:37:59,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:37:59,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:37:59,762 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 62 [2021-11-07 08:37:59,763 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 43 transitions, 98 flow. Second operand has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 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) [2021-11-07 08:37:59,763 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 08:37:59,763 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 62 [2021-11-07 08:37:59,763 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 08:37:59,807 INFO L129 PetriNetUnfolder]: 0/58 cut-off events. [2021-11-07 08:37:59,807 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-11-07 08:37:59,808 INFO L84 FinitePrefix]: Finished finitePrefix Result has 85 conditions, 58 events. 0/58 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 34 event pairs, 0 based on Foata normal form. 0/56 useless extension candidates. Maximal degree in co-relation 0. Up to 12 conditions per place. [2021-11-07 08:37:59,808 INFO L132 encePairwiseOnDemand]: 58/62 looper letters, 11 selfloop transitions, 2 changer transitions 0/46 dead transitions. [2021-11-07 08:37:59,808 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 46 transitions, 130 flow [2021-11-07 08:37:59,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:37:59,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-11-07 08:37:59,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 163 transitions. [2021-11-07 08:37:59,811 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8763440860215054 [2021-11-07 08:37:59,811 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 163 transitions. [2021-11-07 08:37:59,811 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 163 transitions. [2021-11-07 08:37:59,812 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 08:37:59,812 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 163 transitions. [2021-11-07 08:37:59,813 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 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) [2021-11-07 08:37:59,814 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 62.0) internal successors, (248), 4 states have internal predecessors, (248), 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) [2021-11-07 08:37:59,815 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 62.0) internal successors, (248), 4 states have internal predecessors, (248), 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) [2021-11-07 08:37:59,815 INFO L186 Difference]: Start difference. First operand has 47 places, 43 transitions, 98 flow. Second operand 3 states and 163 transitions. [2021-11-07 08:37:59,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 46 transitions, 130 flow [2021-11-07 08:37:59,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 46 transitions, 128 flow, removed 1 selfloop flow, removed 0 redundant places. [2021-11-07 08:37:59,818 INFO L242 Difference]: Finished difference. Result has 50 places, 43 transitions, 106 flow [2021-11-07 08:37:59,818 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=50, PETRI_TRANSITIONS=43} [2021-11-07 08:37:59,818 INFO L334 CegarLoopForPetriNet]: 47 programPoint places, 3 predicate places. [2021-11-07 08:37:59,819 INFO L470 AbstractCegarLoop]: Abstraction has has 50 places, 43 transitions, 106 flow [2021-11-07 08:37:59,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 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) [2021-11-07 08:37:59,819 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 08:37:59,819 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:37:59,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-07 08:37:59,820 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-11-07 08:37:59,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:37:59,820 INFO L85 PathProgramCache]: Analyzing trace with hash -1937290472, now seen corresponding path program 1 times [2021-11-07 08:37:59,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:37:59,821 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840319801] [2021-11-07 08:37:59,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:37:59,821 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:37:59,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:37:59,864 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 08:37:59,864 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:37:59,864 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840319801] [2021-11-07 08:37:59,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840319801] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:37:59,865 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:37:59,865 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:37:59,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775482176] [2021-11-07 08:37:59,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:37:59,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:37:59,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:37:59,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:37:59,867 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 62 [2021-11-07 08:37:59,894 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 43 transitions, 106 flow. Second operand has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 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) [2021-11-07 08:37:59,895 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 08:37:59,895 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 62 [2021-11-07 08:37:59,895 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 08:37:59,933 INFO L129 PetriNetUnfolder]: 3/69 cut-off events. [2021-11-07 08:37:59,933 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-11-07 08:37:59,934 INFO L84 FinitePrefix]: Finished finitePrefix Result has 99 conditions, 69 events. 3/69 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 86 event pairs, 1 based on Foata normal form. 2/70 useless extension candidates. Maximal degree in co-relation 60. Up to 11 conditions per place. [2021-11-07 08:37:59,934 INFO L132 encePairwiseOnDemand]: 58/62 looper letters, 4 selfloop transitions, 3 changer transitions 0/45 dead transitions. [2021-11-07 08:37:59,935 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 45 transitions, 124 flow [2021-11-07 08:37:59,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:37:59,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-11-07 08:37:59,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 164 transitions. [2021-11-07 08:37:59,947 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8817204301075269 [2021-11-07 08:37:59,947 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 164 transitions. [2021-11-07 08:37:59,947 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 164 transitions. [2021-11-07 08:37:59,948 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 08:37:59,948 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 164 transitions. [2021-11-07 08:37:59,949 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 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) [2021-11-07 08:37:59,950 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 62.0) internal successors, (248), 4 states have internal predecessors, (248), 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) [2021-11-07 08:37:59,951 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 62.0) internal successors, (248), 4 states have internal predecessors, (248), 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) [2021-11-07 08:37:59,951 INFO L186 Difference]: Start difference. First operand has 50 places, 43 transitions, 106 flow. Second operand 3 states and 164 transitions. [2021-11-07 08:37:59,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 45 transitions, 124 flow [2021-11-07 08:37:59,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 45 transitions, 122 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-11-07 08:37:59,954 INFO L242 Difference]: Finished difference. Result has 52 places, 45 transitions, 123 flow [2021-11-07 08:37:59,954 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=123, PETRI_PLACES=52, PETRI_TRANSITIONS=45} [2021-11-07 08:37:59,954 INFO L334 CegarLoopForPetriNet]: 47 programPoint places, 5 predicate places. [2021-11-07 08:37:59,955 INFO L470 AbstractCegarLoop]: Abstraction has has 52 places, 45 transitions, 123 flow [2021-11-07 08:37:59,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 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) [2021-11-07 08:37:59,955 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 08:37:59,955 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:37:59,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-07 08:37:59,956 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-11-07 08:37:59,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:37:59,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1062250506, now seen corresponding path program 1 times [2021-11-07 08:37:59,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:37:59,957 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605739801] [2021-11-07 08:37:59,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:37:59,957 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:37:59,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:38:00,074 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:38:00,075 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:38:00,075 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605739801] [2021-11-07 08:38:00,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605739801] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:38:00,076 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893241286] [2021-11-07 08:38:00,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:38:00,077 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:38:00,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b1b864e-3deb-4a83-bd03-4f8a9dcb3dd5/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:38:00,083 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b1b864e-3deb-4a83-bd03-4f8a9dcb3dd5/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:38:00,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b1b864e-3deb-4a83-bd03-4f8a9dcb3dd5/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-07 08:38:00,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:38:00,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 08:38:00,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:38:00,464 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:38:00,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893241286] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:38:00,464 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:38:00,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 10 [2021-11-07 08:38:00,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265048486] [2021-11-07 08:38:00,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 08:38:00,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:38:00,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 08:38:00,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-11-07 08:38:00,469 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 62 [2021-11-07 08:38:00,470 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 45 transitions, 123 flow. Second operand has 10 states, 10 states have (on average 42.7) internal successors, (427), 10 states have internal predecessors, (427), 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) [2021-11-07 08:38:00,470 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 08:38:00,470 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 62 [2021-11-07 08:38:00,470 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 08:38:00,999 INFO L129 PetriNetUnfolder]: 82/283 cut-off events. [2021-11-07 08:38:00,999 INFO L130 PetriNetUnfolder]: For 58/58 co-relation queries the response was YES. [2021-11-07 08:38:01,001 INFO L84 FinitePrefix]: Finished finitePrefix Result has 603 conditions, 283 events. 82/283 cut-off events. For 58/58 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1206 event pairs, 1 based on Foata normal form. 6/289 useless extension candidates. Maximal degree in co-relation 196. Up to 54 conditions per place. [2021-11-07 08:38:01,004 INFO L132 encePairwiseOnDemand]: 50/62 looper letters, 51 selfloop transitions, 42 changer transitions 0/118 dead transitions. [2021-11-07 08:38:01,004 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 118 transitions, 524 flow [2021-11-07 08:38:01,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-07 08:38:01,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-11-07 08:38:01,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1095 transitions. [2021-11-07 08:38:01,010 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7064516129032258 [2021-11-07 08:38:01,010 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1095 transitions. [2021-11-07 08:38:01,010 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1095 transitions. [2021-11-07 08:38:01,012 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 08:38:01,012 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1095 transitions. [2021-11-07 08:38:01,016 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 43.8) internal successors, (1095), 25 states have internal predecessors, (1095), 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) [2021-11-07 08:38:01,022 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 62.0) internal successors, (1612), 26 states have internal predecessors, (1612), 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) [2021-11-07 08:38:01,023 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 62.0) internal successors, (1612), 26 states have internal predecessors, (1612), 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) [2021-11-07 08:38:01,023 INFO L186 Difference]: Start difference. First operand has 52 places, 45 transitions, 123 flow. Second operand 25 states and 1095 transitions. [2021-11-07 08:38:01,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 118 transitions, 524 flow [2021-11-07 08:38:01,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 118 transitions, 512 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-11-07 08:38:01,029 INFO L242 Difference]: Finished difference. Result has 85 places, 77 transitions, 354 flow [2021-11-07 08:38:01,029 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=354, PETRI_PLACES=85, PETRI_TRANSITIONS=77} [2021-11-07 08:38:01,029 INFO L334 CegarLoopForPetriNet]: 47 programPoint places, 38 predicate places. [2021-11-07 08:38:01,030 INFO L470 AbstractCegarLoop]: Abstraction has has 85 places, 77 transitions, 354 flow [2021-11-07 08:38:01,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 42.7) internal successors, (427), 10 states have internal predecessors, (427), 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) [2021-11-07 08:38:01,030 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 08:38:01,030 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:38:01,065 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b1b864e-3deb-4a83-bd03-4f8a9dcb3dd5/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-07 08:38:01,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b1b864e-3deb-4a83-bd03-4f8a9dcb3dd5/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:38:01,254 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-11-07 08:38:01,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:38:01,254 INFO L85 PathProgramCache]: Analyzing trace with hash -586804275, now seen corresponding path program 1 times [2021-11-07 08:38:01,254 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:38:01,255 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005987912] [2021-11-07 08:38:01,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:38:01,255 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:38:01,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-07 08:38:01,272 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-07 08:38:01,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-07 08:38:01,297 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-07 08:38:01,297 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-11-07 08:38:01,297 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATION [2021-11-07 08:38:01,297 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 08:38:01,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-07 08:38:01,298 INFO L731 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2021-11-07 08:38:01,298 WARN L234 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2021-11-07 08:38:01,298 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2021-11-07 08:38:01,310 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of3ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:01,310 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of3ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:01,310 WARN L322 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:01,310 WARN L322 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:01,310 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of3ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:01,310 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of3ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:01,311 WARN L322 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:01,311 WARN L322 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:01,311 WARN L322 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:01,311 WARN L322 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:01,311 WARN L322 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:01,311 WARN L322 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:01,311 WARN L322 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:01,312 WARN L322 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:01,312 WARN L322 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:01,312 WARN L322 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:01,312 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:01,312 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:01,312 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:01,312 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:01,313 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of3ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:01,313 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of3ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:01,313 WARN L322 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:01,313 WARN L322 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:01,313 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of3ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:01,313 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of3ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:01,313 WARN L322 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:01,314 WARN L322 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:01,314 WARN L322 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:01,314 WARN L322 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:01,314 WARN L322 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:01,314 WARN L322 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:01,314 WARN L322 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:01,314 WARN L322 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:01,315 WARN L322 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:01,315 WARN L322 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:01,315 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:01,315 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:01,315 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:01,315 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:01,316 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of3ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:01,316 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of3ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:01,316 WARN L322 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:01,316 WARN L322 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:01,316 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of3ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:01,316 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of3ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:01,316 WARN L322 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:01,316 WARN L322 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:01,317 WARN L322 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:01,317 WARN L322 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:01,317 WARN L322 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:01,317 WARN L322 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:01,317 WARN L322 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:01,317 WARN L322 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:01,317 WARN L322 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:01,318 WARN L322 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:01,318 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:01,318 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:01,318 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:01,318 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:01,319 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:01,319 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:01,319 WARN L322 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:01,319 WARN L322 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:01,319 WARN L322 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:01,321 WARN L322 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:01,321 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:01,321 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:01,321 WARN L322 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:01,321 WARN L322 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:01,323 WARN L322 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:01,323 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:01,323 WARN L322 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:01,323 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:01,323 WARN L322 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:01,328 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-11-07 08:38:01,330 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 08:38:01,331 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 08:38:01,331 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-07 08:38:01,333 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 70 places, 69 transitions, 168 flow [2021-11-07 08:38:01,363 INFO L129 PetriNetUnfolder]: 24/211 cut-off events. [2021-11-07 08:38:01,363 INFO L130 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2021-11-07 08:38:01,364 INFO L84 FinitePrefix]: Finished finitePrefix Result has 239 conditions, 211 events. 24/211 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 488 event pairs, 1 based on Foata normal form. 0/179 useless extension candidates. Maximal degree in co-relation 136. Up to 16 conditions per place. [2021-11-07 08:38:01,364 INFO L82 GeneralOperation]: Start removeDead. Operand has 70 places, 69 transitions, 168 flow [2021-11-07 08:38:01,365 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 55 places, 49 transitions, 119 flow [2021-11-07 08:38:01,367 INFO L129 PetriNetUnfolder]: 1/22 cut-off events. [2021-11-07 08:38:01,367 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-11-07 08:38:01,367 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 08:38:01,368 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:38:01,368 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-11-07 08:38:01,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:38:01,368 INFO L85 PathProgramCache]: Analyzing trace with hash 1587491341, now seen corresponding path program 1 times [2021-11-07 08:38:01,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:38:01,369 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700722939] [2021-11-07 08:38:01,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:38:01,369 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:38:01,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:38:01,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:38:01,386 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:38:01,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700722939] [2021-11-07 08:38:01,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700722939] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:38:01,387 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:38:01,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 08:38:01,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596272717] [2021-11-07 08:38:01,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 08:38:01,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:38:01,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 08:38:01,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 08:38:01,389 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 69 [2021-11-07 08:38:01,389 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 49 transitions, 119 flow. Second operand has 2 states, 2 states have (on average 65.5) internal successors, (131), 2 states have internal predecessors, (131), 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) [2021-11-07 08:38:01,389 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 08:38:01,389 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 69 [2021-11-07 08:38:01,389 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 08:38:01,398 INFO L129 PetriNetUnfolder]: 0/79 cut-off events. [2021-11-07 08:38:01,399 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2021-11-07 08:38:01,399 INFO L84 FinitePrefix]: Finished finitePrefix Result has 96 conditions, 79 events. 0/79 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 57 event pairs, 0 based on Foata normal form. 4/79 useless extension candidates. Maximal degree in co-relation 0. Up to 4 conditions per place. [2021-11-07 08:38:01,399 INFO L132 encePairwiseOnDemand]: 68/69 looper letters, 0 selfloop transitions, 0 changer transitions 0/48 dead transitions. [2021-11-07 08:38:01,400 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 48 transitions, 117 flow [2021-11-07 08:38:01,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 08:38:01,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-11-07 08:38:01,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 131 transitions. [2021-11-07 08:38:01,401 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9492753623188406 [2021-11-07 08:38:01,401 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 131 transitions. [2021-11-07 08:38:01,401 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 131 transitions. [2021-11-07 08:38:01,401 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 08:38:01,402 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 131 transitions. [2021-11-07 08:38:01,402 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 65.5) internal successors, (131), 2 states have internal predecessors, (131), 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) [2021-11-07 08:38:01,403 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 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) [2021-11-07 08:38:01,403 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 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) [2021-11-07 08:38:01,403 INFO L186 Difference]: Start difference. First operand has 55 places, 49 transitions, 119 flow. Second operand 2 states and 131 transitions. [2021-11-07 08:38:01,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 48 transitions, 117 flow [2021-11-07 08:38:01,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 48 transitions, 111 flow, removed 3 selfloop flow, removed 0 redundant places. [2021-11-07 08:38:01,406 INFO L242 Difference]: Finished difference. Result has 56 places, 48 transitions, 111 flow [2021-11-07 08:38:01,406 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=111, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=111, PETRI_PLACES=56, PETRI_TRANSITIONS=48} [2021-11-07 08:38:01,406 INFO L334 CegarLoopForPetriNet]: 55 programPoint places, 1 predicate places. [2021-11-07 08:38:01,406 INFO L470 AbstractCegarLoop]: Abstraction has has 56 places, 48 transitions, 111 flow [2021-11-07 08:38:01,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 65.5) internal successors, (131), 2 states have internal predecessors, (131), 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) [2021-11-07 08:38:01,407 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 08:38:01,407 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:38:01,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-07 08:38:01,407 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-11-07 08:38:01,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:38:01,408 INFO L85 PathProgramCache]: Analyzing trace with hash 1587492302, now seen corresponding path program 1 times [2021-11-07 08:38:01,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:38:01,408 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549163620] [2021-11-07 08:38:01,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:38:01,409 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:38:01,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:38:01,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:38:01,431 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:38:01,431 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549163620] [2021-11-07 08:38:01,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549163620] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:38:01,431 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:38:01,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:38:01,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603424824] [2021-11-07 08:38:01,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:38:01,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:38:01,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:38:01,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:38:01,434 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 69 [2021-11-07 08:38:01,434 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 48 transitions, 111 flow. Second operand has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 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) [2021-11-07 08:38:01,435 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 08:38:01,435 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 69 [2021-11-07 08:38:01,435 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 08:38:01,460 INFO L129 PetriNetUnfolder]: 0/76 cut-off events. [2021-11-07 08:38:01,460 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-11-07 08:38:01,460 INFO L84 FinitePrefix]: Finished finitePrefix Result has 113 conditions, 76 events. 0/76 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 51 event pairs, 0 based on Foata normal form. 0/73 useless extension candidates. Maximal degree in co-relation 0. Up to 18 conditions per place. [2021-11-07 08:38:01,461 INFO L132 encePairwiseOnDemand]: 66/69 looper letters, 12 selfloop transitions, 2 changer transitions 0/52 dead transitions. [2021-11-07 08:38:01,461 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 52 transitions, 147 flow [2021-11-07 08:38:01,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:38:01,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-11-07 08:38:01,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 180 transitions. [2021-11-07 08:38:01,462 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8695652173913043 [2021-11-07 08:38:01,463 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 180 transitions. [2021-11-07 08:38:01,463 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 180 transitions. [2021-11-07 08:38:01,463 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 08:38:01,463 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 180 transitions. [2021-11-07 08:38:01,464 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 60.0) internal successors, (180), 3 states have internal predecessors, (180), 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) [2021-11-07 08:38:01,465 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 69.0) internal successors, (276), 4 states have internal predecessors, (276), 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) [2021-11-07 08:38:01,465 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 69.0) internal successors, (276), 4 states have internal predecessors, (276), 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) [2021-11-07 08:38:01,465 INFO L186 Difference]: Start difference. First operand has 56 places, 48 transitions, 111 flow. Second operand 3 states and 180 transitions. [2021-11-07 08:38:01,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 52 transitions, 147 flow [2021-11-07 08:38:01,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 52 transitions, 147 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-11-07 08:38:01,468 INFO L242 Difference]: Finished difference. Result has 59 places, 49 transitions, 123 flow [2021-11-07 08:38:01,468 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=111, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=123, PETRI_PLACES=59, PETRI_TRANSITIONS=49} [2021-11-07 08:38:01,469 INFO L334 CegarLoopForPetriNet]: 55 programPoint places, 4 predicate places. [2021-11-07 08:38:01,469 INFO L470 AbstractCegarLoop]: Abstraction has has 59 places, 49 transitions, 123 flow [2021-11-07 08:38:01,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 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) [2021-11-07 08:38:01,469 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 08:38:01,470 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:38:01,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-07 08:38:01,470 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-11-07 08:38:01,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:38:01,471 INFO L85 PathProgramCache]: Analyzing trace with hash 1428688765, now seen corresponding path program 1 times [2021-11-07 08:38:01,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:38:01,472 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396230459] [2021-11-07 08:38:01,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:38:01,472 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:38:01,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:38:01,517 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 08:38:01,517 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:38:01,519 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396230459] [2021-11-07 08:38:01,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396230459] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:38:01,520 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:38:01,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:38:01,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865615101] [2021-11-07 08:38:01,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:38:01,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:38:01,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:38:01,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:38:01,526 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 69 [2021-11-07 08:38:01,527 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 49 transitions, 123 flow. Second operand has 3 states, 3 states have (on average 59.0) internal successors, (177), 3 states have internal predecessors, (177), 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) [2021-11-07 08:38:01,527 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 08:38:01,527 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 69 [2021-11-07 08:38:01,527 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 08:38:01,562 INFO L129 PetriNetUnfolder]: 16/125 cut-off events. [2021-11-07 08:38:01,563 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-11-07 08:38:01,564 INFO L84 FinitePrefix]: Finished finitePrefix Result has 186 conditions, 125 events. 16/125 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 299 event pairs, 7 based on Foata normal form. 3/122 useless extension candidates. Maximal degree in co-relation 178. Up to 35 conditions per place. [2021-11-07 08:38:01,565 INFO L132 encePairwiseOnDemand]: 64/69 looper letters, 5 selfloop transitions, 4 changer transitions 0/52 dead transitions. [2021-11-07 08:38:01,565 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 52 transitions, 147 flow [2021-11-07 08:38:01,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:38:01,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-11-07 08:38:01,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 184 transitions. [2021-11-07 08:38:01,567 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8888888888888888 [2021-11-07 08:38:01,567 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 184 transitions. [2021-11-07 08:38:01,567 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 184 transitions. [2021-11-07 08:38:01,567 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 08:38:01,567 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 184 transitions. [2021-11-07 08:38:01,568 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 61.333333333333336) internal successors, (184), 3 states have internal predecessors, (184), 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) [2021-11-07 08:38:01,569 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 69.0) internal successors, (276), 4 states have internal predecessors, (276), 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) [2021-11-07 08:38:01,569 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 69.0) internal successors, (276), 4 states have internal predecessors, (276), 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) [2021-11-07 08:38:01,569 INFO L186 Difference]: Start difference. First operand has 59 places, 49 transitions, 123 flow. Second operand 3 states and 184 transitions. [2021-11-07 08:38:01,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 52 transitions, 147 flow [2021-11-07 08:38:01,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 52 transitions, 145 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-11-07 08:38:01,573 INFO L242 Difference]: Finished difference. Result has 61 places, 52 transitions, 147 flow [2021-11-07 08:38:01,574 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=121, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=147, PETRI_PLACES=61, PETRI_TRANSITIONS=52} [2021-11-07 08:38:01,574 INFO L334 CegarLoopForPetriNet]: 55 programPoint places, 6 predicate places. [2021-11-07 08:38:01,574 INFO L470 AbstractCegarLoop]: Abstraction has has 61 places, 52 transitions, 147 flow [2021-11-07 08:38:01,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.0) internal successors, (177), 3 states have internal predecessors, (177), 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) [2021-11-07 08:38:01,575 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 08:38:01,575 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:38:01,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-07 08:38:01,575 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-11-07 08:38:01,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:38:01,576 INFO L85 PathProgramCache]: Analyzing trace with hash -1002536670, now seen corresponding path program 1 times [2021-11-07 08:38:01,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:38:01,576 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121223087] [2021-11-07 08:38:01,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:38:01,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:38:01,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:38:01,647 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:38:01,647 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:38:01,647 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121223087] [2021-11-07 08:38:01,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121223087] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:38:01,647 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349684018] [2021-11-07 08:38:01,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:38:01,648 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:38:01,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b1b864e-3deb-4a83-bd03-4f8a9dcb3dd5/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:38:01,649 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b1b864e-3deb-4a83-bd03-4f8a9dcb3dd5/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:38:01,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b1b864e-3deb-4a83-bd03-4f8a9dcb3dd5/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-07 08:38:01,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:38:01,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 08:38:01,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:38:01,882 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:38:01,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349684018] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:38:01,883 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:38:01,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-11-07 08:38:01,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349426192] [2021-11-07 08:38:01,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 08:38:01,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:38:01,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 08:38:01,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-07 08:38:01,890 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 69 [2021-11-07 08:38:01,891 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 52 transitions, 147 flow. Second operand has 7 states, 7 states have (on average 56.142857142857146) internal successors, (393), 7 states have internal predecessors, (393), 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) [2021-11-07 08:38:01,891 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 08:38:01,891 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 69 [2021-11-07 08:38:01,891 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 08:38:01,955 INFO L129 PetriNetUnfolder]: 16/122 cut-off events. [2021-11-07 08:38:01,955 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-11-07 08:38:01,958 INFO L84 FinitePrefix]: Finished finitePrefix Result has 207 conditions, 122 events. 16/122 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 294 event pairs, 7 based on Foata normal form. 1/117 useless extension candidates. Maximal degree in co-relation 198. Up to 34 conditions per place. [2021-11-07 08:38:01,960 INFO L132 encePairwiseOnDemand]: 64/69 looper letters, 15 selfloop transitions, 5 changer transitions 0/60 dead transitions. [2021-11-07 08:38:01,960 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 60 transitions, 205 flow [2021-11-07 08:38:01,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 08:38:01,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-11-07 08:38:01,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 345 transitions. [2021-11-07 08:38:01,963 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8333333333333334 [2021-11-07 08:38:01,964 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 345 transitions. [2021-11-07 08:38:01,964 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 345 transitions. [2021-11-07 08:38:01,965 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 08:38:01,965 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 345 transitions. [2021-11-07 08:38:01,968 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 57.5) internal successors, (345), 6 states have internal predecessors, (345), 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) [2021-11-07 08:38:01,970 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 69.0) internal successors, (483), 7 states have internal predecessors, (483), 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) [2021-11-07 08:38:01,971 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 69.0) internal successors, (483), 7 states have internal predecessors, (483), 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) [2021-11-07 08:38:01,971 INFO L186 Difference]: Start difference. First operand has 61 places, 52 transitions, 147 flow. Second operand 6 states and 345 transitions. [2021-11-07 08:38:01,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 60 transitions, 205 flow [2021-11-07 08:38:01,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 60 transitions, 201 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-11-07 08:38:01,974 INFO L242 Difference]: Finished difference. Result has 68 places, 55 transitions, 175 flow [2021-11-07 08:38:01,975 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=143, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=175, PETRI_PLACES=68, PETRI_TRANSITIONS=55} [2021-11-07 08:38:01,976 INFO L334 CegarLoopForPetriNet]: 55 programPoint places, 13 predicate places. [2021-11-07 08:38:01,976 INFO L470 AbstractCegarLoop]: Abstraction has has 68 places, 55 transitions, 175 flow [2021-11-07 08:38:01,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 56.142857142857146) internal successors, (393), 7 states have internal predecessors, (393), 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) [2021-11-07 08:38:01,977 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 08:38:01,977 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:38:02,008 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b1b864e-3deb-4a83-bd03-4f8a9dcb3dd5/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-07 08:38:02,190 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b1b864e-3deb-4a83-bd03-4f8a9dcb3dd5/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:38:02,191 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-11-07 08:38:02,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:38:02,191 INFO L85 PathProgramCache]: Analyzing trace with hash 418169138, now seen corresponding path program 1 times [2021-11-07 08:38:02,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:38:02,191 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688377417] [2021-11-07 08:38:02,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:38:02,192 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:38:02,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:38:02,270 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 08:38:02,270 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:38:02,270 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688377417] [2021-11-07 08:38:02,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688377417] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:38:02,270 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176052349] [2021-11-07 08:38:02,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:38:02,271 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:38:02,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b1b864e-3deb-4a83-bd03-4f8a9dcb3dd5/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:38:02,272 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b1b864e-3deb-4a83-bd03-4f8a9dcb3dd5/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:38:02,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b1b864e-3deb-4a83-bd03-4f8a9dcb3dd5/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-07 08:38:02,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:38:02,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 08:38:02,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:38:02,536 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:38:02,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176052349] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:38:02,537 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:38:02,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-11-07 08:38:02,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334816821] [2021-11-07 08:38:02,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 08:38:02,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:38:02,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 08:38:02,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-11-07 08:38:02,540 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 69 [2021-11-07 08:38:02,541 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 55 transitions, 175 flow. Second operand has 12 states, 12 states have (on average 48.0) internal successors, (576), 12 states have internal predecessors, (576), 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) [2021-11-07 08:38:02,541 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 08:38:02,542 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 69 [2021-11-07 08:38:02,542 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 08:38:03,464 INFO L129 PetriNetUnfolder]: 286/779 cut-off events. [2021-11-07 08:38:03,465 INFO L130 PetriNetUnfolder]: For 328/328 co-relation queries the response was YES. [2021-11-07 08:38:03,468 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1775 conditions, 779 events. 286/779 cut-off events. For 328/328 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 4329 event pairs, 2 based on Foata normal form. 13/792 useless extension candidates. Maximal degree in co-relation 1763. Up to 222 conditions per place. [2021-11-07 08:38:03,476 INFO L132 encePairwiseOnDemand]: 56/69 looper letters, 84 selfloop transitions, 95 changer transitions 0/208 dead transitions. [2021-11-07 08:38:03,477 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 208 transitions, 1105 flow [2021-11-07 08:38:03,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-11-07 08:38:03,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2021-11-07 08:38:03,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 2114 transitions. [2021-11-07 08:38:03,485 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7125042130097742 [2021-11-07 08:38:03,485 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 2114 transitions. [2021-11-07 08:38:03,486 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 2114 transitions. [2021-11-07 08:38:03,488 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 08:38:03,488 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 2114 transitions. [2021-11-07 08:38:03,496 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 49.16279069767442) internal successors, (2114), 43 states have internal predecessors, (2114), 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) [2021-11-07 08:38:03,504 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 69.0) internal successors, (3036), 44 states have internal predecessors, (3036), 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) [2021-11-07 08:38:03,506 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 69.0) internal successors, (3036), 44 states have internal predecessors, (3036), 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) [2021-11-07 08:38:03,506 INFO L186 Difference]: Start difference. First operand has 68 places, 55 transitions, 175 flow. Second operand 43 states and 2114 transitions. [2021-11-07 08:38:03,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 208 transitions, 1105 flow [2021-11-07 08:38:03,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 208 transitions, 1082 flow, removed 6 selfloop flow, removed 2 redundant places. [2021-11-07 08:38:03,516 INFO L242 Difference]: Finished difference. Result has 128 places, 137 transitions, 819 flow [2021-11-07 08:38:03,516 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=169, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=819, PETRI_PLACES=128, PETRI_TRANSITIONS=137} [2021-11-07 08:38:03,516 INFO L334 CegarLoopForPetriNet]: 55 programPoint places, 73 predicate places. [2021-11-07 08:38:03,517 INFO L470 AbstractCegarLoop]: Abstraction has has 128 places, 137 transitions, 819 flow [2021-11-07 08:38:03,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 48.0) internal successors, (576), 12 states have internal predecessors, (576), 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) [2021-11-07 08:38:03,517 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 08:38:03,517 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:38:03,558 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b1b864e-3deb-4a83-bd03-4f8a9dcb3dd5/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-07 08:38:03,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b1b864e-3deb-4a83-bd03-4f8a9dcb3dd5/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-07 08:38:03,742 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-11-07 08:38:03,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:38:03,743 INFO L85 PathProgramCache]: Analyzing trace with hash 197969645, now seen corresponding path program 1 times [2021-11-07 08:38:03,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:38:03,743 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118490057] [2021-11-07 08:38:03,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:38:03,743 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:38:03,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-07 08:38:03,766 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-07 08:38:03,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-07 08:38:03,815 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-07 08:38:03,815 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-11-07 08:38:03,815 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATION [2021-11-07 08:38:03,815 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 08:38:03,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-07 08:38:03,816 INFO L731 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2021-11-07 08:38:03,816 WARN L234 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2021-11-07 08:38:03,816 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2021-11-07 08:38:03,829 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:03,829 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:03,830 WARN L322 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:03,830 WARN L322 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:03,831 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:03,831 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:03,831 WARN L322 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:03,831 WARN L322 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:03,831 WARN L322 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:03,831 WARN L322 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:03,832 WARN L322 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:03,832 WARN L322 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:03,832 WARN L322 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:03,832 WARN L322 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:03,832 WARN L322 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:03,832 WARN L322 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:03,832 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:03,833 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:03,833 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:03,833 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:03,833 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:03,833 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:03,834 WARN L322 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:03,834 WARN L322 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:03,834 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:03,834 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:03,834 WARN L322 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:03,834 WARN L322 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:03,834 WARN L322 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:03,835 WARN L322 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:03,835 WARN L322 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:03,835 WARN L322 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:03,835 WARN L322 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:03,835 WARN L322 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:03,835 WARN L322 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:03,836 WARN L322 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:03,836 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:03,836 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:03,836 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:03,837 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:03,838 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:03,838 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:03,839 WARN L322 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:03,839 WARN L322 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:03,839 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:03,839 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:03,839 WARN L322 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:03,839 WARN L322 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:03,840 WARN L322 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:03,840 WARN L322 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:03,840 WARN L322 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:03,840 WARN L322 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:03,840 WARN L322 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:03,840 WARN L322 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:03,841 WARN L322 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:03,841 WARN L322 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:03,841 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:03,841 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:03,841 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:03,841 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:03,842 WARN L322 ript$VariableManager]: TermVariabe |threadThread4of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:03,842 WARN L322 ript$VariableManager]: TermVariabe |threadThread4of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:03,842 WARN L322 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:03,842 WARN L322 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:03,843 WARN L322 ript$VariableManager]: TermVariabe |threadThread4of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:03,843 WARN L322 ript$VariableManager]: TermVariabe |threadThread4of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:03,843 WARN L322 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:03,843 WARN L322 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:03,844 WARN L322 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:03,844 WARN L322 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:03,844 WARN L322 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:03,844 WARN L322 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:03,844 WARN L322 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:03,844 WARN L322 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:03,844 WARN L322 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:03,845 WARN L322 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:03,845 WARN L322 ript$VariableManager]: TermVariabe |threadThread4of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:03,845 WARN L322 ript$VariableManager]: TermVariabe |threadThread4of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:03,845 WARN L322 ript$VariableManager]: TermVariabe |threadThread4of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:03,845 WARN L322 ript$VariableManager]: TermVariabe |threadThread4of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:03,846 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:03,846 WARN L322 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:03,846 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:03,847 WARN L322 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:03,847 WARN L322 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:03,851 WARN L322 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:03,851 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:03,851 WARN L322 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:03,852 WARN L322 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:03,852 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:03,853 WARN L322 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:03,853 WARN L322 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:03,853 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:03,854 WARN L322 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:03,854 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:03,856 WARN L322 ript$VariableManager]: TermVariabe |threadThread4of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:03,856 WARN L322 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:03,856 WARN L322 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:03,856 WARN L322 ript$VariableManager]: TermVariabe |threadThread4of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:03,856 WARN L322 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:03,861 INFO L148 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-11-07 08:38:03,863 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 08:38:03,863 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 08:38:03,864 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-07 08:38:03,865 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 78 places, 76 transitions, 196 flow [2021-11-07 08:38:03,902 INFO L129 PetriNetUnfolder]: 47/358 cut-off events. [2021-11-07 08:38:03,902 INFO L130 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2021-11-07 08:38:03,903 INFO L84 FinitePrefix]: Finished finitePrefix Result has 413 conditions, 358 events. 47/358 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1083 event pairs, 6 based on Foata normal form. 0/306 useless extension candidates. Maximal degree in co-relation 231. Up to 32 conditions per place. [2021-11-07 08:38:03,904 INFO L82 GeneralOperation]: Start removeDead. Operand has 78 places, 76 transitions, 196 flow [2021-11-07 08:38:03,905 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 63 places, 55 transitions, 142 flow [2021-11-07 08:38:03,907 INFO L129 PetriNetUnfolder]: 1/23 cut-off events. [2021-11-07 08:38:03,907 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-11-07 08:38:03,908 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 08:38:03,908 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:38:03,908 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-11-07 08:38:03,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:38:03,909 INFO L85 PathProgramCache]: Analyzing trace with hash 404926733, now seen corresponding path program 1 times [2021-11-07 08:38:03,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:38:03,909 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346865692] [2021-11-07 08:38:03,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:38:03,909 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:38:03,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:38:03,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:38:03,926 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:38:03,926 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346865692] [2021-11-07 08:38:03,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346865692] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:38:03,926 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:38:03,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 08:38:03,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088822949] [2021-11-07 08:38:03,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 08:38:03,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:38:03,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 08:38:03,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 08:38:03,928 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 76 [2021-11-07 08:38:03,929 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 55 transitions, 142 flow. Second operand has 2 states, 2 states have (on average 72.5) internal successors, (145), 2 states have internal predecessors, (145), 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) [2021-11-07 08:38:03,929 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 08:38:03,929 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 76 [2021-11-07 08:38:03,929 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 08:38:03,940 INFO L129 PetriNetUnfolder]: 0/97 cut-off events. [2021-11-07 08:38:03,940 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2021-11-07 08:38:03,940 INFO L84 FinitePrefix]: Finished finitePrefix Result has 121 conditions, 97 events. 0/97 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 72 event pairs, 0 based on Foata normal form. 5/97 useless extension candidates. Maximal degree in co-relation 0. Up to 5 conditions per place. [2021-11-07 08:38:03,941 INFO L132 encePairwiseOnDemand]: 75/76 looper letters, 0 selfloop transitions, 0 changer transitions 0/54 dead transitions. [2021-11-07 08:38:03,941 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 54 transitions, 140 flow [2021-11-07 08:38:03,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 08:38:03,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-11-07 08:38:03,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 145 transitions. [2021-11-07 08:38:03,942 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9539473684210527 [2021-11-07 08:38:03,942 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 145 transitions. [2021-11-07 08:38:03,942 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 145 transitions. [2021-11-07 08:38:03,943 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 08:38:03,943 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 145 transitions. [2021-11-07 08:38:03,944 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 72.5) internal successors, (145), 2 states have internal predecessors, (145), 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) [2021-11-07 08:38:03,944 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 76.0) internal successors, (228), 3 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:38:03,945 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 76.0) internal successors, (228), 3 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:38:03,945 INFO L186 Difference]: Start difference. First operand has 63 places, 55 transitions, 142 flow. Second operand 2 states and 145 transitions. [2021-11-07 08:38:03,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 54 transitions, 140 flow [2021-11-07 08:38:03,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 54 transitions, 128 flow, removed 6 selfloop flow, removed 0 redundant places. [2021-11-07 08:38:03,947 INFO L242 Difference]: Finished difference. Result has 64 places, 54 transitions, 128 flow [2021-11-07 08:38:03,947 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=128, PETRI_PLACES=64, PETRI_TRANSITIONS=54} [2021-11-07 08:38:03,947 INFO L334 CegarLoopForPetriNet]: 63 programPoint places, 1 predicate places. [2021-11-07 08:38:03,948 INFO L470 AbstractCegarLoop]: Abstraction has has 64 places, 54 transitions, 128 flow [2021-11-07 08:38:03,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 72.5) internal successors, (145), 2 states have internal predecessors, (145), 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) [2021-11-07 08:38:03,948 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 08:38:03,948 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:38:03,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-07 08:38:03,949 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-11-07 08:38:03,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:38:03,949 INFO L85 PathProgramCache]: Analyzing trace with hash 404927694, now seen corresponding path program 1 times [2021-11-07 08:38:03,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:38:03,949 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523676188] [2021-11-07 08:38:03,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:38:03,950 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:38:03,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:38:03,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:38:03,969 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:38:03,969 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523676188] [2021-11-07 08:38:03,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523676188] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:38:03,969 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:38:03,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:38:03,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419312169] [2021-11-07 08:38:03,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:38:03,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:38:03,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:38:03,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:38:03,972 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 76 [2021-11-07 08:38:03,972 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 54 transitions, 128 flow. Second operand has 3 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 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) [2021-11-07 08:38:03,972 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 08:38:03,972 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 76 [2021-11-07 08:38:03,972 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 08:38:03,997 INFO L129 PetriNetUnfolder]: 0/94 cut-off events. [2021-11-07 08:38:03,997 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-11-07 08:38:03,997 INFO L84 FinitePrefix]: Finished finitePrefix Result has 141 conditions, 94 events. 0/94 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 66 event pairs, 0 based on Foata normal form. 0/90 useless extension candidates. Maximal degree in co-relation 0. Up to 24 conditions per place. [2021-11-07 08:38:03,998 INFO L132 encePairwiseOnDemand]: 73/76 looper letters, 13 selfloop transitions, 2 changer transitions 0/58 dead transitions. [2021-11-07 08:38:03,998 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 58 transitions, 166 flow [2021-11-07 08:38:03,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:38:03,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-11-07 08:38:03,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 199 transitions. [2021-11-07 08:38:03,999 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8728070175438597 [2021-11-07 08:38:04,000 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 199 transitions. [2021-11-07 08:38:04,000 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 199 transitions. [2021-11-07 08:38:04,000 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 08:38:04,000 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 199 transitions. [2021-11-07 08:38:04,001 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 66.33333333333333) internal successors, (199), 3 states have internal predecessors, (199), 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) [2021-11-07 08:38:04,002 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 76.0) internal successors, (304), 4 states have internal predecessors, (304), 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) [2021-11-07 08:38:04,002 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 76.0) internal successors, (304), 4 states have internal predecessors, (304), 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) [2021-11-07 08:38:04,002 INFO L186 Difference]: Start difference. First operand has 64 places, 54 transitions, 128 flow. Second operand 3 states and 199 transitions. [2021-11-07 08:38:04,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 58 transitions, 166 flow [2021-11-07 08:38:04,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 58 transitions, 166 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-11-07 08:38:04,005 INFO L242 Difference]: Finished difference. Result has 67 places, 55 transitions, 140 flow [2021-11-07 08:38:04,005 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=140, PETRI_PLACES=67, PETRI_TRANSITIONS=55} [2021-11-07 08:38:04,005 INFO L334 CegarLoopForPetriNet]: 63 programPoint places, 4 predicate places. [2021-11-07 08:38:04,005 INFO L470 AbstractCegarLoop]: Abstraction has has 67 places, 55 transitions, 140 flow [2021-11-07 08:38:04,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 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) [2021-11-07 08:38:04,006 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 08:38:04,006 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:38:04,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-07 08:38:04,006 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-11-07 08:38:04,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:38:04,007 INFO L85 PathProgramCache]: Analyzing trace with hash 1011050754, now seen corresponding path program 1 times [2021-11-07 08:38:04,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:38:04,007 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318334056] [2021-11-07 08:38:04,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:38:04,008 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:38:04,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:38:04,044 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 08:38:04,044 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:38:04,044 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318334056] [2021-11-07 08:38:04,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318334056] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:38:04,045 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:38:04,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:38:04,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225481635] [2021-11-07 08:38:04,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:38:04,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:38:04,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:38:04,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:38:04,047 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 76 [2021-11-07 08:38:04,047 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 55 transitions, 140 flow. Second operand has 3 states, 3 states have (on average 65.0) internal successors, (195), 3 states have internal predecessors, (195), 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) [2021-11-07 08:38:04,047 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 08:38:04,048 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 76 [2021-11-07 08:38:04,048 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 08:38:04,088 INFO L129 PetriNetUnfolder]: 56/243 cut-off events. [2021-11-07 08:38:04,088 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-11-07 08:38:04,089 INFO L84 FinitePrefix]: Finished finitePrefix Result has 373 conditions, 243 events. 56/243 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 889 event pairs, 29 based on Foata normal form. 4/225 useless extension candidates. Maximal degree in co-relation 364. Up to 98 conditions per place. [2021-11-07 08:38:04,091 INFO L132 encePairwiseOnDemand]: 70/76 looper letters, 6 selfloop transitions, 5 changer transitions 0/59 dead transitions. [2021-11-07 08:38:04,091 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 59 transitions, 170 flow [2021-11-07 08:38:04,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:38:04,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-11-07 08:38:04,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 204 transitions. [2021-11-07 08:38:04,095 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8947368421052632 [2021-11-07 08:38:04,095 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 204 transitions. [2021-11-07 08:38:04,095 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 204 transitions. [2021-11-07 08:38:04,096 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 08:38:04,096 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 204 transitions. [2021-11-07 08:38:04,098 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 68.0) internal successors, (204), 3 states have internal predecessors, (204), 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) [2021-11-07 08:38:04,099 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 76.0) internal successors, (304), 4 states have internal predecessors, (304), 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) [2021-11-07 08:38:04,099 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 76.0) internal successors, (304), 4 states have internal predecessors, (304), 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) [2021-11-07 08:38:04,099 INFO L186 Difference]: Start difference. First operand has 67 places, 55 transitions, 140 flow. Second operand 3 states and 204 transitions. [2021-11-07 08:38:04,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 59 transitions, 170 flow [2021-11-07 08:38:04,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 59 transitions, 168 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-11-07 08:38:04,102 INFO L242 Difference]: Finished difference. Result has 69 places, 59 transitions, 171 flow [2021-11-07 08:38:04,103 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=171, PETRI_PLACES=69, PETRI_TRANSITIONS=59} [2021-11-07 08:38:04,103 INFO L334 CegarLoopForPetriNet]: 63 programPoint places, 6 predicate places. [2021-11-07 08:38:04,103 INFO L470 AbstractCegarLoop]: Abstraction has has 69 places, 59 transitions, 171 flow [2021-11-07 08:38:04,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.0) internal successors, (195), 3 states have internal predecessors, (195), 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) [2021-11-07 08:38:04,104 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 08:38:04,104 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:38:04,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-07 08:38:04,104 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-11-07 08:38:04,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:38:04,105 INFO L85 PathProgramCache]: Analyzing trace with hash -340961756, now seen corresponding path program 1 times [2021-11-07 08:38:04,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:38:04,105 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962897950] [2021-11-07 08:38:04,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:38:04,105 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:38:04,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:38:04,159 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:38:04,160 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:38:04,160 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962897950] [2021-11-07 08:38:04,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962897950] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:38:04,160 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445583447] [2021-11-07 08:38:04,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:38:04,161 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:38:04,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b1b864e-3deb-4a83-bd03-4f8a9dcb3dd5/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:38:04,162 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b1b864e-3deb-4a83-bd03-4f8a9dcb3dd5/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:38:04,186 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b1b864e-3deb-4a83-bd03-4f8a9dcb3dd5/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-07 08:38:04,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:38:04,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 08:38:04,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:38:04,350 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:38:04,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445583447] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:38:04,351 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:38:04,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-11-07 08:38:04,351 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856395777] [2021-11-07 08:38:04,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 08:38:04,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:38:04,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 08:38:04,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-07 08:38:04,354 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 76 [2021-11-07 08:38:04,355 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 59 transitions, 171 flow. Second operand has 7 states, 7 states have (on average 62.142857142857146) internal successors, (435), 7 states have internal predecessors, (435), 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) [2021-11-07 08:38:04,355 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 08:38:04,355 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 76 [2021-11-07 08:38:04,355 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 08:38:04,428 INFO L129 PetriNetUnfolder]: 56/240 cut-off events. [2021-11-07 08:38:04,428 INFO L130 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2021-11-07 08:38:04,429 INFO L84 FinitePrefix]: Finished finitePrefix Result has 402 conditions, 240 events. 56/240 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 906 event pairs, 29 based on Foata normal form. 1/219 useless extension candidates. Maximal degree in co-relation 392. Up to 97 conditions per place. [2021-11-07 08:38:04,432 INFO L132 encePairwiseOnDemand]: 71/76 looper letters, 16 selfloop transitions, 5 changer transitions 0/67 dead transitions. [2021-11-07 08:38:04,432 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 67 transitions, 231 flow [2021-11-07 08:38:04,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 08:38:04,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-11-07 08:38:04,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 382 transitions. [2021-11-07 08:38:04,434 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8377192982456141 [2021-11-07 08:38:04,434 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 382 transitions. [2021-11-07 08:38:04,434 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 382 transitions. [2021-11-07 08:38:04,435 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 08:38:04,435 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 382 transitions. [2021-11-07 08:38:04,436 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 63.666666666666664) internal successors, (382), 6 states have internal predecessors, (382), 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) [2021-11-07 08:38:04,437 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 76.0) internal successors, (532), 7 states have internal predecessors, (532), 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) [2021-11-07 08:38:04,438 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 76.0) internal successors, (532), 7 states have internal predecessors, (532), 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) [2021-11-07 08:38:04,438 INFO L186 Difference]: Start difference. First operand has 69 places, 59 transitions, 171 flow. Second operand 6 states and 382 transitions. [2021-11-07 08:38:04,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 67 transitions, 231 flow [2021-11-07 08:38:04,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 67 transitions, 226 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-11-07 08:38:04,441 INFO L242 Difference]: Finished difference. Result has 76 places, 62 transitions, 198 flow [2021-11-07 08:38:04,441 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=198, PETRI_PLACES=76, PETRI_TRANSITIONS=62} [2021-11-07 08:38:04,442 INFO L334 CegarLoopForPetriNet]: 63 programPoint places, 13 predicate places. [2021-11-07 08:38:04,442 INFO L470 AbstractCegarLoop]: Abstraction has has 76 places, 62 transitions, 198 flow [2021-11-07 08:38:04,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 62.142857142857146) internal successors, (435), 7 states have internal predecessors, (435), 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) [2021-11-07 08:38:04,442 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 08:38:04,443 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:38:04,479 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b1b864e-3deb-4a83-bd03-4f8a9dcb3dd5/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-07 08:38:04,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b1b864e-3deb-4a83-bd03-4f8a9dcb3dd5/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-07 08:38:04,666 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-11-07 08:38:04,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:38:04,667 INFO L85 PathProgramCache]: Analyzing trace with hash 1443871695, now seen corresponding path program 1 times [2021-11-07 08:38:04,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:38:04,667 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759013374] [2021-11-07 08:38:04,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:38:04,668 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:38:04,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:38:04,740 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 08:38:04,740 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:38:04,741 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759013374] [2021-11-07 08:38:04,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759013374] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:38:04,741 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432279321] [2021-11-07 08:38:04,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:38:04,742 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:38:04,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b1b864e-3deb-4a83-bd03-4f8a9dcb3dd5/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:38:04,743 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b1b864e-3deb-4a83-bd03-4f8a9dcb3dd5/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:38:04,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b1b864e-3deb-4a83-bd03-4f8a9dcb3dd5/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-07 08:38:04,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:38:04,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 08:38:04,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:38:05,014 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:38:05,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432279321] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:38:05,014 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:38:05,015 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-11-07 08:38:05,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316985267] [2021-11-07 08:38:05,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 08:38:05,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:38:05,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 08:38:05,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-11-07 08:38:05,021 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 76 [2021-11-07 08:38:05,022 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 62 transitions, 198 flow. Second operand has 12 states, 12 states have (on average 53.0) internal successors, (636), 12 states have internal predecessors, (636), 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) [2021-11-07 08:38:05,022 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 08:38:05,022 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 76 [2021-11-07 08:38:05,022 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 08:38:06,081 INFO L129 PetriNetUnfolder]: 892/2007 cut-off events. [2021-11-07 08:38:06,081 INFO L130 PetriNetUnfolder]: For 854/854 co-relation queries the response was YES. [2021-11-07 08:38:06,091 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4759 conditions, 2007 events. 892/2007 cut-off events. For 854/854 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 12855 event pairs, 88 based on Foata normal form. 21/2028 useless extension candidates. Maximal degree in co-relation 4746. Up to 757 conditions per place. [2021-11-07 08:38:06,110 INFO L132 encePairwiseOnDemand]: 62/76 looper letters, 105 selfloop transitions, 99 changer transitions 0/237 dead transitions. [2021-11-07 08:38:06,111 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 237 transitions, 1293 flow [2021-11-07 08:38:06,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-11-07 08:38:06,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2021-11-07 08:38:06,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 2353 transitions. [2021-11-07 08:38:06,118 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7200122399020807 [2021-11-07 08:38:06,119 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 2353 transitions. [2021-11-07 08:38:06,119 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 2353 transitions. [2021-11-07 08:38:06,123 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 08:38:06,123 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 2353 transitions. [2021-11-07 08:38:06,128 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 54.72093023255814) internal successors, (2353), 43 states have internal predecessors, (2353), 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) [2021-11-07 08:38:06,136 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 76.0) internal successors, (3344), 44 states have internal predecessors, (3344), 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) [2021-11-07 08:38:06,138 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 76.0) internal successors, (3344), 44 states have internal predecessors, (3344), 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) [2021-11-07 08:38:06,138 INFO L186 Difference]: Start difference. First operand has 76 places, 62 transitions, 198 flow. Second operand 43 states and 2353 transitions. [2021-11-07 08:38:06,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 237 transitions, 1293 flow [2021-11-07 08:38:06,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 237 transitions, 1270 flow, removed 6 selfloop flow, removed 2 redundant places. [2021-11-07 08:38:06,150 INFO L242 Difference]: Finished difference. Result has 136 places, 148 transitions, 884 flow [2021-11-07 08:38:06,150 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=884, PETRI_PLACES=136, PETRI_TRANSITIONS=148} [2021-11-07 08:38:06,150 INFO L334 CegarLoopForPetriNet]: 63 programPoint places, 73 predicate places. [2021-11-07 08:38:06,151 INFO L470 AbstractCegarLoop]: Abstraction has has 136 places, 148 transitions, 884 flow [2021-11-07 08:38:06,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 53.0) internal successors, (636), 12 states have internal predecessors, (636), 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) [2021-11-07 08:38:06,151 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 08:38:06,152 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:38:06,191 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b1b864e-3deb-4a83-bd03-4f8a9dcb3dd5/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-07 08:38:06,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b1b864e-3deb-4a83-bd03-4f8a9dcb3dd5/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:38:06,378 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-11-07 08:38:06,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:38:06,379 INFO L85 PathProgramCache]: Analyzing trace with hash 1828766288, now seen corresponding path program 1 times [2021-11-07 08:38:06,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:38:06,379 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201445696] [2021-11-07 08:38:06,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:38:06,379 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:38:06,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:38:06,471 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 08:38:06,471 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:38:06,471 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201445696] [2021-11-07 08:38:06,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201445696] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:38:06,472 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984555881] [2021-11-07 08:38:06,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:38:06,472 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:38:06,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b1b864e-3deb-4a83-bd03-4f8a9dcb3dd5/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:38:06,473 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b1b864e-3deb-4a83-bd03-4f8a9dcb3dd5/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:38:06,492 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b1b864e-3deb-4a83-bd03-4f8a9dcb3dd5/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-07 08:38:06,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:38:06,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 08:38:06,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:38:06,832 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 08:38:06,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984555881] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:38:06,833 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:38:06,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-11-07 08:38:06,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504723637] [2021-11-07 08:38:06,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-07 08:38:06,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:38:06,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-07 08:38:06,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-11-07 08:38:06,835 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 76 [2021-11-07 08:38:06,836 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 148 transitions, 884 flow. Second operand has 13 states, 13 states have (on average 52.69230769230769) internal successors, (685), 13 states have internal predecessors, (685), 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) [2021-11-07 08:38:06,836 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 08:38:06,836 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 76 [2021-11-07 08:38:06,836 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 08:38:08,008 INFO L129 PetriNetUnfolder]: 1743/4446 cut-off events. [2021-11-07 08:38:08,008 INFO L130 PetriNetUnfolder]: For 18234/18246 co-relation queries the response was YES. [2021-11-07 08:38:08,046 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15105 conditions, 4446 events. 1743/4446 cut-off events. For 18234/18246 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 36827 event pairs, 94 based on Foata normal form. 28/4474 useless extension candidates. Maximal degree in co-relation 15072. Up to 1292 conditions per place. [2021-11-07 08:38:08,093 INFO L132 encePairwiseOnDemand]: 63/76 looper letters, 150 selfloop transitions, 89 changer transitions 0/296 dead transitions. [2021-11-07 08:38:08,093 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 296 transitions, 2525 flow [2021-11-07 08:38:08,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-07 08:38:08,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-11-07 08:38:08,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1270 transitions. [2021-11-07 08:38:08,097 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7265446224256293 [2021-11-07 08:38:08,097 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1270 transitions. [2021-11-07 08:38:08,097 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1270 transitions. [2021-11-07 08:38:08,099 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 08:38:08,099 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1270 transitions. [2021-11-07 08:38:08,106 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 55.21739130434783) internal successors, (1270), 23 states have internal predecessors, (1270), 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) [2021-11-07 08:38:08,111 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 76.0) internal successors, (1824), 24 states have internal predecessors, (1824), 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) [2021-11-07 08:38:08,112 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 76.0) internal successors, (1824), 24 states have internal predecessors, (1824), 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) [2021-11-07 08:38:08,112 INFO L186 Difference]: Start difference. First operand has 136 places, 148 transitions, 884 flow. Second operand 23 states and 1270 transitions. [2021-11-07 08:38:08,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 296 transitions, 2525 flow [2021-11-07 08:38:08,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 296 transitions, 2279 flow, removed 81 selfloop flow, removed 9 redundant places. [2021-11-07 08:38:08,181 INFO L242 Difference]: Finished difference. Result has 150 places, 198 transitions, 1260 flow [2021-11-07 08:38:08,182 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=761, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1260, PETRI_PLACES=150, PETRI_TRANSITIONS=198} [2021-11-07 08:38:08,182 INFO L334 CegarLoopForPetriNet]: 63 programPoint places, 87 predicate places. [2021-11-07 08:38:08,182 INFO L470 AbstractCegarLoop]: Abstraction has has 150 places, 198 transitions, 1260 flow [2021-11-07 08:38:08,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 52.69230769230769) internal successors, (685), 13 states have internal predecessors, (685), 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) [2021-11-07 08:38:08,183 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 08:38:08,183 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:38:08,219 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b1b864e-3deb-4a83-bd03-4f8a9dcb3dd5/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-07 08:38:08,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b1b864e-3deb-4a83-bd03-4f8a9dcb3dd5/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2021-11-07 08:38:08,406 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-11-07 08:38:08,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:38:08,407 INFO L85 PathProgramCache]: Analyzing trace with hash -657372946, now seen corresponding path program 1 times [2021-11-07 08:38:08,407 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:38:08,407 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826592150] [2021-11-07 08:38:08,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:38:08,408 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:38:08,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:38:08,513 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:38:08,513 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:38:08,513 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826592150] [2021-11-07 08:38:08,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826592150] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:38:08,514 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411836215] [2021-11-07 08:38:08,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:38:08,515 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:38:08,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b1b864e-3deb-4a83-bd03-4f8a9dcb3dd5/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:38:08,516 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b1b864e-3deb-4a83-bd03-4f8a9dcb3dd5/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:38:08,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b1b864e-3deb-4a83-bd03-4f8a9dcb3dd5/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-07 08:38:08,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:38:08,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-07 08:38:08,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:38:08,991 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:38:08,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411836215] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:38:08,992 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:38:08,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 15 [2021-11-07 08:38:08,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490527157] [2021-11-07 08:38:08,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-07 08:38:08,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:38:08,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-07 08:38:08,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-11-07 08:38:08,996 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 76 [2021-11-07 08:38:08,997 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 198 transitions, 1260 flow. Second operand has 15 states, 15 states have (on average 52.8) internal successors, (792), 15 states have internal predecessors, (792), 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) [2021-11-07 08:38:08,997 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 08:38:08,997 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 76 [2021-11-07 08:38:08,998 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 08:38:11,095 INFO L129 PetriNetUnfolder]: 2698/6990 cut-off events. [2021-11-07 08:38:11,095 INFO L130 PetriNetUnfolder]: For 39300/39387 co-relation queries the response was YES. [2021-11-07 08:38:11,165 INFO L84 FinitePrefix]: Finished finitePrefix Result has 26202 conditions, 6990 events. 2698/6990 cut-off events. For 39300/39387 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 64489 event pairs, 38 based on Foata normal form. 122/7109 useless extension candidates. Maximal degree in co-relation 26169. Up to 1881 conditions per place. [2021-11-07 08:38:11,229 INFO L132 encePairwiseOnDemand]: 62/76 looper letters, 173 selfloop transitions, 303 changer transitions 0/539 dead transitions. [2021-11-07 08:38:11,229 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 539 transitions, 4974 flow [2021-11-07 08:38:11,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-11-07 08:38:11,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2021-11-07 08:38:11,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 2584 transitions. [2021-11-07 08:38:11,237 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.723404255319149 [2021-11-07 08:38:11,237 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 2584 transitions. [2021-11-07 08:38:11,237 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 2584 transitions. [2021-11-07 08:38:11,239 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 08:38:11,239 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 2584 transitions. [2021-11-07 08:38:11,246 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 54.97872340425532) internal successors, (2584), 47 states have internal predecessors, (2584), 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) [2021-11-07 08:38:11,254 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 76.0) internal successors, (3648), 48 states have internal predecessors, (3648), 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) [2021-11-07 08:38:11,256 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 76.0) internal successors, (3648), 48 states have internal predecessors, (3648), 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) [2021-11-07 08:38:11,257 INFO L186 Difference]: Start difference. First operand has 150 places, 198 transitions, 1260 flow. Second operand 47 states and 2584 transitions. [2021-11-07 08:38:11,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 539 transitions, 4974 flow [2021-11-07 08:38:11,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 539 transitions, 4912 flow, removed 15 selfloop flow, removed 7 redundant places. [2021-11-07 08:38:11,429 INFO L242 Difference]: Finished difference. Result has 209 places, 410 transitions, 3819 flow [2021-11-07 08:38:11,429 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=1219, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=3819, PETRI_PLACES=209, PETRI_TRANSITIONS=410} [2021-11-07 08:38:11,430 INFO L334 CegarLoopForPetriNet]: 63 programPoint places, 146 predicate places. [2021-11-07 08:38:11,430 INFO L470 AbstractCegarLoop]: Abstraction has has 209 places, 410 transitions, 3819 flow [2021-11-07 08:38:11,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 52.8) internal successors, (792), 15 states have internal predecessors, (792), 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) [2021-11-07 08:38:11,431 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 08:38:11,431 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:38:11,465 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b1b864e-3deb-4a83-bd03-4f8a9dcb3dd5/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-07 08:38:11,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b1b864e-3deb-4a83-bd03-4f8a9dcb3dd5/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:38:11,647 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0INUSE_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-11-07 08:38:11,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:38:11,647 INFO L85 PathProgramCache]: Analyzing trace with hash -816749256, now seen corresponding path program 1 times [2021-11-07 08:38:11,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:38:11,648 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366199754] [2021-11-07 08:38:11,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:38:11,648 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:38:11,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-07 08:38:11,662 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-07 08:38:11,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-07 08:38:11,684 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-07 08:38:11,684 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-11-07 08:38:11,684 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATION [2021-11-07 08:38:11,685 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 08:38:11,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-07 08:38:11,685 INFO L731 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:38:11,685 WARN L234 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2021-11-07 08:38:11,686 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2021-11-07 08:38:11,694 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:11,694 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:11,695 WARN L322 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:11,695 WARN L322 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:11,695 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:11,695 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:11,695 WARN L322 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:11,695 WARN L322 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:11,696 WARN L322 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:11,696 WARN L322 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:11,696 WARN L322 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:11,696 WARN L322 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:11,696 WARN L322 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:11,696 WARN L322 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:11,697 WARN L322 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:11,697 WARN L322 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:11,697 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:11,697 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:11,697 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:11,697 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:11,698 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:11,698 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:11,698 WARN L322 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:11,698 WARN L322 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:11,698 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:11,698 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:11,698 WARN L322 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:11,699 WARN L322 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:11,699 WARN L322 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:11,699 WARN L322 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:11,699 WARN L322 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:11,699 WARN L322 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:11,699 WARN L322 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:11,700 WARN L322 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:11,700 WARN L322 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:11,700 WARN L322 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:11,700 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:11,700 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:11,700 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:11,701 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:11,701 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:11,701 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:11,701 WARN L322 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:11,701 WARN L322 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:11,701 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:11,702 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:11,702 WARN L322 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:11,702 WARN L322 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:11,702 WARN L322 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:11,702 WARN L322 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:11,702 WARN L322 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:11,702 WARN L322 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:11,703 WARN L322 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:11,703 WARN L322 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:11,703 WARN L322 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:11,703 WARN L322 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:11,703 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:11,703 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:11,704 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:11,704 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:11,704 WARN L322 ript$VariableManager]: TermVariabe |threadThread5of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:11,704 WARN L322 ript$VariableManager]: TermVariabe |threadThread5of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:11,704 WARN L322 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:11,704 WARN L322 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:11,705 WARN L322 ript$VariableManager]: TermVariabe |threadThread5of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:11,705 WARN L322 ript$VariableManager]: TermVariabe |threadThread5of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:11,705 WARN L322 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:11,705 WARN L322 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:11,705 WARN L322 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:11,705 WARN L322 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:11,705 WARN L322 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:11,706 WARN L322 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:11,706 WARN L322 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:11,706 WARN L322 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:11,706 WARN L322 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:11,706 WARN L322 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:11,706 WARN L322 ript$VariableManager]: TermVariabe |threadThread5of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:11,707 WARN L322 ript$VariableManager]: TermVariabe |threadThread5of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:11,707 WARN L322 ript$VariableManager]: TermVariabe |threadThread5of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:11,707 WARN L322 ript$VariableManager]: TermVariabe |threadThread5of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:11,707 WARN L322 ript$VariableManager]: TermVariabe |threadThread4of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:11,707 WARN L322 ript$VariableManager]: TermVariabe |threadThread4of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:11,707 WARN L322 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:11,708 WARN L322 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:11,708 WARN L322 ript$VariableManager]: TermVariabe |threadThread4of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:11,708 WARN L322 ript$VariableManager]: TermVariabe |threadThread4of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:11,708 WARN L322 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:11,708 WARN L322 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:11,708 WARN L322 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:11,708 WARN L322 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:11,709 WARN L322 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:11,709 WARN L322 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:11,709 WARN L322 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:11,709 WARN L322 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:11,709 WARN L322 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:11,709 WARN L322 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:11,710 WARN L322 ript$VariableManager]: TermVariabe |threadThread4of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:11,710 WARN L322 ript$VariableManager]: TermVariabe |threadThread4of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:11,710 WARN L322 ript$VariableManager]: TermVariabe |threadThread4of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:11,710 WARN L322 ript$VariableManager]: TermVariabe |threadThread4of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:11,710 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:11,711 WARN L322 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:11,711 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:11,711 WARN L322 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:11,711 WARN L322 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:11,713 WARN L322 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:11,713 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:11,713 WARN L322 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:11,713 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:11,713 WARN L322 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:11,714 WARN L322 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:11,715 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:11,715 WARN L322 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:11,715 WARN L322 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:11,715 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:11,716 WARN L322 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:11,717 WARN L322 ript$VariableManager]: TermVariabe |threadThread4of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:11,717 WARN L322 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:11,717 WARN L322 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:11,717 WARN L322 ript$VariableManager]: TermVariabe |threadThread4of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:11,718 WARN L322 ript$VariableManager]: TermVariabe |threadThread5of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:11,719 WARN L322 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:11,719 WARN L322 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:11,719 WARN L322 ript$VariableManager]: TermVariabe |threadThread5of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:11,719 WARN L322 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:38:11,725 INFO L148 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2021-11-07 08:38:11,726 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 08:38:11,727 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 08:38:11,727 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-07 08:38:11,728 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 86 places, 83 transitions, 226 flow [2021-11-07 08:38:11,791 INFO L129 PetriNetUnfolder]: 98/637 cut-off events. [2021-11-07 08:38:11,791 INFO L130 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2021-11-07 08:38:11,793 INFO L84 FinitePrefix]: Finished finitePrefix Result has 748 conditions, 637 events. 98/637 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2603 event pairs, 23 based on Foata normal form. 0/549 useless extension candidates. Maximal degree in co-relation 403. Up to 80 conditions per place. [2021-11-07 08:38:11,793 INFO L82 GeneralOperation]: Start removeDead. Operand has 86 places, 83 transitions, 226 flow [2021-11-07 08:38:11,795 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 71 places, 61 transitions, 167 flow [2021-11-07 08:38:11,797 INFO L129 PetriNetUnfolder]: 1/22 cut-off events. [2021-11-07 08:38:11,797 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-11-07 08:38:11,797 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 08:38:11,797 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:38:11,798 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-11-07 08:38:11,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:38:11,798 INFO L85 PathProgramCache]: Analyzing trace with hash 130671758, now seen corresponding path program 1 times [2021-11-07 08:38:11,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:38:11,798 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142679822] [2021-11-07 08:38:11,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:38:11,799 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:38:11,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:38:11,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:38:11,816 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:38:11,816 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142679822] [2021-11-07 08:38:11,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142679822] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:38:11,816 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:38:11,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:38:11,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82302857] [2021-11-07 08:38:11,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:38:11,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:38:11,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:38:11,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:38:11,818 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 83 [2021-11-07 08:38:11,819 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 61 transitions, 167 flow. Second operand has 3 states, 3 states have (on average 68.0) internal successors, (204), 3 states have internal predecessors, (204), 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) [2021-11-07 08:38:11,819 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 08:38:11,819 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 83 [2021-11-07 08:38:11,819 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 08:38:11,845 INFO L129 PetriNetUnfolder]: 0/112 cut-off events. [2021-11-07 08:38:11,846 INFO L130 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2021-11-07 08:38:11,846 INFO L84 FinitePrefix]: Finished finitePrefix Result has 178 conditions, 112 events. 0/112 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 85 event pairs, 0 based on Foata normal form. 0/107 useless extension candidates. Maximal degree in co-relation 0. Up to 30 conditions per place. [2021-11-07 08:38:11,846 INFO L132 encePairwiseOnDemand]: 79/83 looper letters, 14 selfloop transitions, 2 changer transitions 0/64 dead transitions. [2021-11-07 08:38:11,846 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 64 transitions, 205 flow [2021-11-07 08:38:11,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:38:11,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-11-07 08:38:11,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 220 transitions. [2021-11-07 08:38:11,848 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8835341365461847 [2021-11-07 08:38:11,848 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 220 transitions. [2021-11-07 08:38:11,848 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 220 transitions. [2021-11-07 08:38:11,848 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 08:38:11,848 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 220 transitions. [2021-11-07 08:38:11,849 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 73.33333333333333) internal successors, (220), 3 states have internal predecessors, (220), 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) [2021-11-07 08:38:11,850 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 83.0) internal successors, (332), 4 states have internal predecessors, (332), 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) [2021-11-07 08:38:11,850 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 83.0) internal successors, (332), 4 states have internal predecessors, (332), 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) [2021-11-07 08:38:11,850 INFO L186 Difference]: Start difference. First operand has 71 places, 61 transitions, 167 flow. Second operand 3 states and 220 transitions. [2021-11-07 08:38:11,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 64 transitions, 205 flow [2021-11-07 08:38:11,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 64 transitions, 185 flow, removed 10 selfloop flow, removed 0 redundant places. [2021-11-07 08:38:11,852 INFO L242 Difference]: Finished difference. Result has 74 places, 61 transitions, 157 flow [2021-11-07 08:38:11,853 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=83, PETRI_DIFFERENCE_MINUEND_FLOW=145, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=157, PETRI_PLACES=74, PETRI_TRANSITIONS=61} [2021-11-07 08:38:11,853 INFO L334 CegarLoopForPetriNet]: 71 programPoint places, 3 predicate places. [2021-11-07 08:38:11,853 INFO L470 AbstractCegarLoop]: Abstraction has has 74 places, 61 transitions, 157 flow [2021-11-07 08:38:11,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.0) internal successors, (204), 3 states have internal predecessors, (204), 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) [2021-11-07 08:38:11,854 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 08:38:11,854 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:38:11,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-07 08:38:11,854 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-11-07 08:38:11,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:38:11,855 INFO L85 PathProgramCache]: Analyzing trace with hash 1104762791, now seen corresponding path program 1 times [2021-11-07 08:38:11,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:38:11,855 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071114971] [2021-11-07 08:38:11,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:38:11,855 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:38:11,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:38:11,876 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 08:38:11,876 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:38:11,876 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071114971] [2021-11-07 08:38:11,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071114971] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:38:11,876 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:38:11,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:38:11,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786174440] [2021-11-07 08:38:11,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:38:11,877 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:38:11,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:38:11,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:38:11,878 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 83 [2021-11-07 08:38:11,879 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 61 transitions, 157 flow. Second operand has 3 states, 3 states have (on average 71.0) internal successors, (213), 3 states have internal predecessors, (213), 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) [2021-11-07 08:38:11,879 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 08:38:11,879 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 83 [2021-11-07 08:38:11,879 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 08:38:11,943 INFO L129 PetriNetUnfolder]: 163/499 cut-off events. [2021-11-07 08:38:11,943 INFO L130 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2021-11-07 08:38:11,945 INFO L84 FinitePrefix]: Finished finitePrefix Result has 788 conditions, 499 events. 163/499 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2444 event pairs, 95 based on Foata normal form. 5/457 useless extension candidates. Maximal degree in co-relation 746. Up to 252 conditions per place. [2021-11-07 08:38:11,948 INFO L132 encePairwiseOnDemand]: 76/83 looper letters, 7 selfloop transitions, 6 changer transitions 0/66 dead transitions. [2021-11-07 08:38:11,949 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 66 transitions, 193 flow [2021-11-07 08:38:11,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:38:11,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-11-07 08:38:11,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 224 transitions. [2021-11-07 08:38:11,950 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8995983935742972 [2021-11-07 08:38:11,950 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 224 transitions. [2021-11-07 08:38:11,950 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 224 transitions. [2021-11-07 08:38:11,951 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 08:38:11,951 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 224 transitions. [2021-11-07 08:38:11,951 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 74.66666666666667) internal successors, (224), 3 states have internal predecessors, (224), 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) [2021-11-07 08:38:11,952 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 83.0) internal successors, (332), 4 states have internal predecessors, (332), 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) [2021-11-07 08:38:11,952 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 83.0) internal successors, (332), 4 states have internal predecessors, (332), 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) [2021-11-07 08:38:11,952 INFO L186 Difference]: Start difference. First operand has 74 places, 61 transitions, 157 flow. Second operand 3 states and 224 transitions. [2021-11-07 08:38:11,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 66 transitions, 193 flow [2021-11-07 08:38:11,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 66 transitions, 191 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-11-07 08:38:11,955 INFO L242 Difference]: Finished difference. Result has 76 places, 66 transitions, 195 flow [2021-11-07 08:38:11,955 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=83, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=195, PETRI_PLACES=76, PETRI_TRANSITIONS=66} [2021-11-07 08:38:11,955 INFO L334 CegarLoopForPetriNet]: 71 programPoint places, 5 predicate places. [2021-11-07 08:38:11,955 INFO L470 AbstractCegarLoop]: Abstraction has has 76 places, 66 transitions, 195 flow [2021-11-07 08:38:11,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.0) internal successors, (213), 3 states have internal predecessors, (213), 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) [2021-11-07 08:38:11,956 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 08:38:11,956 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:38:11,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-07 08:38:11,956 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-11-07 08:38:11,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:38:11,957 INFO L85 PathProgramCache]: Analyzing trace with hash -299098835, now seen corresponding path program 1 times [2021-11-07 08:38:11,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:38:11,957 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231793488] [2021-11-07 08:38:11,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:38:11,958 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:38:11,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:38:11,986 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:38:11,987 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:38:11,987 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231793488] [2021-11-07 08:38:11,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231793488] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:38:11,987 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253346846] [2021-11-07 08:38:11,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:38:11,987 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:38:11,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b1b864e-3deb-4a83-bd03-4f8a9dcb3dd5/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:38:11,988 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b1b864e-3deb-4a83-bd03-4f8a9dcb3dd5/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:38:12,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b1b864e-3deb-4a83-bd03-4f8a9dcb3dd5/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-07 08:38:12,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:38:12,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 08:38:12,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:38:12,280 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:38:12,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253346846] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:38:12,281 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:38:12,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-11-07 08:38:12,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117875641] [2021-11-07 08:38:12,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 08:38:12,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:38:12,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 08:38:12,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-07 08:38:12,283 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 83 [2021-11-07 08:38:12,284 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 66 transitions, 195 flow. Second operand has 7 states, 7 states have (on average 68.14285714285714) internal successors, (477), 7 states have internal predecessors, (477), 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) [2021-11-07 08:38:12,284 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 08:38:12,284 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 83 [2021-11-07 08:38:12,285 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 08:38:12,379 INFO L129 PetriNetUnfolder]: 163/496 cut-off events. [2021-11-07 08:38:12,380 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2021-11-07 08:38:12,382 INFO L84 FinitePrefix]: Finished finitePrefix Result has 825 conditions, 496 events. 163/496 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2468 event pairs, 95 based on Foata normal form. 1/450 useless extension candidates. Maximal degree in co-relation 764. Up to 251 conditions per place. [2021-11-07 08:38:12,385 INFO L132 encePairwiseOnDemand]: 78/83 looper letters, 17 selfloop transitions, 5 changer transitions 0/74 dead transitions. [2021-11-07 08:38:12,385 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 74 transitions, 257 flow [2021-11-07 08:38:12,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 08:38:12,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-11-07 08:38:12,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 419 transitions. [2021-11-07 08:38:12,387 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8413654618473896 [2021-11-07 08:38:12,387 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 419 transitions. [2021-11-07 08:38:12,387 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 419 transitions. [2021-11-07 08:38:12,387 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 08:38:12,388 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 419 transitions. [2021-11-07 08:38:12,388 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 69.83333333333333) internal successors, (419), 6 states have internal predecessors, (419), 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) [2021-11-07 08:38:12,389 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 83.0) internal successors, (581), 7 states have internal predecessors, (581), 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) [2021-11-07 08:38:12,390 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 83.0) internal successors, (581), 7 states have internal predecessors, (581), 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) [2021-11-07 08:38:12,390 INFO L186 Difference]: Start difference. First operand has 76 places, 66 transitions, 195 flow. Second operand 6 states and 419 transitions. [2021-11-07 08:38:12,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 74 transitions, 257 flow [2021-11-07 08:38:12,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 74 transitions, 251 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-11-07 08:38:12,392 INFO L242 Difference]: Finished difference. Result has 83 places, 69 transitions, 221 flow [2021-11-07 08:38:12,393 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=83, PETRI_DIFFERENCE_MINUEND_FLOW=189, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=221, PETRI_PLACES=83, PETRI_TRANSITIONS=69} [2021-11-07 08:38:12,393 INFO L334 CegarLoopForPetriNet]: 71 programPoint places, 12 predicate places. [2021-11-07 08:38:12,393 INFO L470 AbstractCegarLoop]: Abstraction has has 83 places, 69 transitions, 221 flow [2021-11-07 08:38:12,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 68.14285714285714) internal successors, (477), 7 states have internal predecessors, (477), 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) [2021-11-07 08:38:12,394 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 08:38:12,394 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:38:12,428 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b1b864e-3deb-4a83-bd03-4f8a9dcb3dd5/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-07 08:38:12,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b1b864e-3deb-4a83-bd03-4f8a9dcb3dd5/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-07 08:38:12,615 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-11-07 08:38:12,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:38:12,615 INFO L85 PathProgramCache]: Analyzing trace with hash 2087313427, now seen corresponding path program 1 times [2021-11-07 08:38:12,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:38:12,616 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403463207] [2021-11-07 08:38:12,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:38:12,616 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:38:12,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:38:12,687 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 08:38:12,688 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:38:12,688 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403463207] [2021-11-07 08:38:12,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403463207] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:38:12,688 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956215685] [2021-11-07 08:38:12,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:38:12,689 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:38:12,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b1b864e-3deb-4a83-bd03-4f8a9dcb3dd5/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:38:12,690 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b1b864e-3deb-4a83-bd03-4f8a9dcb3dd5/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:38:12,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b1b864e-3deb-4a83-bd03-4f8a9dcb3dd5/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-07 08:38:12,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:38:12,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 08:38:12,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:38:13,025 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:38:13,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956215685] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:38:13,025 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:38:13,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-11-07 08:38:13,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138355087] [2021-11-07 08:38:13,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 08:38:13,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:38:13,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 08:38:13,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-11-07 08:38:13,030 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 83 [2021-11-07 08:38:13,031 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 69 transitions, 221 flow. Second operand has 12 states, 12 states have (on average 58.0) internal successors, (696), 12 states have internal predecessors, (696), 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) [2021-11-07 08:38:13,031 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 08:38:13,031 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 83 [2021-11-07 08:38:13,031 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 08:38:14,427 INFO L129 PetriNetUnfolder]: 2450/5093 cut-off events. [2021-11-07 08:38:14,428 INFO L130 PetriNetUnfolder]: For 1993/1993 co-relation queries the response was YES. [2021-11-07 08:38:14,447 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12048 conditions, 5093 events. 2450/5093 cut-off events. For 1993/1993 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 36480 event pairs, 452 based on Foata normal form. 37/5130 useless extension candidates. Maximal degree in co-relation 4680. Up to 2176 conditions per place. [2021-11-07 08:38:14,481 INFO L132 encePairwiseOnDemand]: 68/83 looper letters, 114 selfloop transitions, 103 changer transitions 0/254 dead transitions. [2021-11-07 08:38:14,481 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 254 transitions, 1397 flow [2021-11-07 08:38:14,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-11-07 08:38:14,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2021-11-07 08:38:14,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 2580 transitions. [2021-11-07 08:38:14,487 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7228915662650602 [2021-11-07 08:38:14,488 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 2580 transitions. [2021-11-07 08:38:14,488 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 2580 transitions. [2021-11-07 08:38:14,490 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 08:38:14,490 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 2580 transitions. [2021-11-07 08:38:14,496 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 60.0) internal successors, (2580), 43 states have internal predecessors, (2580), 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) [2021-11-07 08:38:14,503 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 83.0) internal successors, (3652), 44 states have internal predecessors, (3652), 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) [2021-11-07 08:38:14,504 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 83.0) internal successors, (3652), 44 states have internal predecessors, (3652), 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) [2021-11-07 08:38:14,504 INFO L186 Difference]: Start difference. First operand has 83 places, 69 transitions, 221 flow. Second operand 43 states and 2580 transitions. [2021-11-07 08:38:14,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 254 transitions, 1397 flow [2021-11-07 08:38:14,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 254 transitions, 1374 flow, removed 6 selfloop flow, removed 2 redundant places. [2021-11-07 08:38:14,513 INFO L242 Difference]: Finished difference. Result has 143 places, 158 transitions, 931 flow [2021-11-07 08:38:14,513 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=83, PETRI_DIFFERENCE_MINUEND_FLOW=215, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=931, PETRI_PLACES=143, PETRI_TRANSITIONS=158} [2021-11-07 08:38:14,514 INFO L334 CegarLoopForPetriNet]: 71 programPoint places, 72 predicate places. [2021-11-07 08:38:14,514 INFO L470 AbstractCegarLoop]: Abstraction has has 143 places, 158 transitions, 931 flow [2021-11-07 08:38:14,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 58.0) internal successors, (696), 12 states have internal predecessors, (696), 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) [2021-11-07 08:38:14,515 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 08:38:14,515 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:38:14,549 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b1b864e-3deb-4a83-bd03-4f8a9dcb3dd5/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-07 08:38:14,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b1b864e-3deb-4a83-bd03-4f8a9dcb3dd5/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:38:14,734 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-11-07 08:38:14,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:38:14,735 INFO L85 PathProgramCache]: Analyzing trace with hash 876469859, now seen corresponding path program 1 times [2021-11-07 08:38:14,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:38:14,735 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508615609] [2021-11-07 08:38:14,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:38:14,735 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:38:14,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:38:14,842 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 08:38:14,842 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:38:14,842 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508615609] [2021-11-07 08:38:14,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508615609] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:38:14,843 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451154243] [2021-11-07 08:38:14,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:38:14,843 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:38:14,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b1b864e-3deb-4a83-bd03-4f8a9dcb3dd5/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:38:14,847 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b1b864e-3deb-4a83-bd03-4f8a9dcb3dd5/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:38:14,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b1b864e-3deb-4a83-bd03-4f8a9dcb3dd5/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-07 08:38:15,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:38:15,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 08:38:15,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:38:15,305 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 08:38:15,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451154243] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:38:15,305 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:38:15,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-11-07 08:38:15,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126576773] [2021-11-07 08:38:15,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-07 08:38:15,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:38:15,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-07 08:38:15,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-11-07 08:38:15,310 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 83 [2021-11-07 08:38:15,311 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 158 transitions, 931 flow. Second operand has 13 states, 13 states have (on average 57.69230769230769) internal successors, (750), 13 states have internal predecessors, (750), 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) [2021-11-07 08:38:15,311 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 08:38:15,311 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 83 [2021-11-07 08:38:15,311 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 08:38:17,513 INFO L129 PetriNetUnfolder]: 5032/11657 cut-off events. [2021-11-07 08:38:17,513 INFO L130 PetriNetUnfolder]: For 46732/46744 co-relation queries the response was YES. [2021-11-07 08:38:17,599 INFO L84 FinitePrefix]: Finished finitePrefix Result has 40413 conditions, 11657 events. 5032/11657 cut-off events. For 46732/46744 co-relation queries the response was YES. Maximal size of possible extension queue 593. Compared 106416 event pairs, 514 based on Foata normal form. 62/11719 useless extension candidates. Maximal degree in co-relation 15795. Up to 4105 conditions per place. [2021-11-07 08:38:17,696 INFO L132 encePairwiseOnDemand]: 69/83 looper letters, 162 selfloop transitions, 99 changer transitions 0/322 dead transitions. [2021-11-07 08:38:17,697 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 322 transitions, 2721 flow [2021-11-07 08:38:17,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-07 08:38:17,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-11-07 08:38:17,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1397 transitions. [2021-11-07 08:38:17,703 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7317967522262965 [2021-11-07 08:38:17,704 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1397 transitions. [2021-11-07 08:38:17,704 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1397 transitions. [2021-11-07 08:38:17,705 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 08:38:17,705 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1397 transitions. [2021-11-07 08:38:17,717 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 60.73913043478261) internal successors, (1397), 23 states have internal predecessors, (1397), 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) [2021-11-07 08:38:17,729 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 83.0) internal successors, (1992), 24 states have internal predecessors, (1992), 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) [2021-11-07 08:38:17,730 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 83.0) internal successors, (1992), 24 states have internal predecessors, (1992), 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) [2021-11-07 08:38:17,730 INFO L186 Difference]: Start difference. First operand has 143 places, 158 transitions, 931 flow. Second operand 23 states and 1397 transitions. [2021-11-07 08:38:17,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 322 transitions, 2721 flow [2021-11-07 08:38:17,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 322 transitions, 2475 flow, removed 81 selfloop flow, removed 9 redundant places. [2021-11-07 08:38:17,817 INFO L242 Difference]: Finished difference. Result has 157 places, 215 transitions, 1377 flow [2021-11-07 08:38:17,817 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=83, PETRI_DIFFERENCE_MINUEND_FLOW=808, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1377, PETRI_PLACES=157, PETRI_TRANSITIONS=215} [2021-11-07 08:38:17,818 INFO L334 CegarLoopForPetriNet]: 71 programPoint places, 86 predicate places. [2021-11-07 08:38:17,818 INFO L470 AbstractCegarLoop]: Abstraction has has 157 places, 215 transitions, 1377 flow [2021-11-07 08:38:17,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 57.69230769230769) internal successors, (750), 13 states have internal predecessors, (750), 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) [2021-11-07 08:38:17,818 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 08:38:17,819 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:38:17,853 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b1b864e-3deb-4a83-bd03-4f8a9dcb3dd5/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-07 08:38:18,034 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b1b864e-3deb-4a83-bd03-4f8a9dcb3dd5/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-07 08:38:18,034 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-11-07 08:38:18,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:38:18,035 INFO L85 PathProgramCache]: Analyzing trace with hash -468774328, now seen corresponding path program 1 times [2021-11-07 08:38:18,035 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:38:18,035 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643044581] [2021-11-07 08:38:18,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:38:18,035 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:38:18,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:38:18,116 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:38:18,117 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:38:18,117 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643044581] [2021-11-07 08:38:18,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643044581] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:38:18,117 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077097851] [2021-11-07 08:38:18,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:38:18,118 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:38:18,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b1b864e-3deb-4a83-bd03-4f8a9dcb3dd5/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:38:18,119 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b1b864e-3deb-4a83-bd03-4f8a9dcb3dd5/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:38:18,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b1b864e-3deb-4a83-bd03-4f8a9dcb3dd5/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-07 08:38:18,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:38:18,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-07 08:38:18,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:38:18,559 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:38:18,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077097851] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:38:18,559 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:38:18,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 15 [2021-11-07 08:38:18,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974616102] [2021-11-07 08:38:18,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-07 08:38:18,561 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:38:18,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-07 08:38:18,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-11-07 08:38:18,563 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 83 [2021-11-07 08:38:18,564 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 215 transitions, 1377 flow. Second operand has 15 states, 15 states have (on average 57.8) internal successors, (867), 15 states have internal predecessors, (867), 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) [2021-11-07 08:38:18,564 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 08:38:18,564 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 83 [2021-11-07 08:38:18,565 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 08:38:22,625 INFO L129 PetriNetUnfolder]: 9139/21444 cut-off events. [2021-11-07 08:38:22,626 INFO L130 PetriNetUnfolder]: For 110995/111089 co-relation queries the response was YES. [2021-11-07 08:38:22,789 INFO L84 FinitePrefix]: Finished finitePrefix Result has 82133 conditions, 21444 events. 9139/21444 cut-off events. For 110995/111089 co-relation queries the response was YES. Maximal size of possible extension queue 1117. Compared 221151 event pairs, 541 based on Foata normal form. 199/21640 useless extension candidates. Maximal degree in co-relation 31827. Up to 7000 conditions per place. [2021-11-07 08:38:23,069 INFO L132 encePairwiseOnDemand]: 68/83 looper letters, 203 selfloop transitions, 331 changer transitions 0/601 dead transitions. [2021-11-07 08:38:23,069 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 601 transitions, 5682 flow [2021-11-07 08:38:23,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-11-07 08:38:23,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2021-11-07 08:38:23,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 2843 transitions. [2021-11-07 08:38:23,075 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7287874903870802 [2021-11-07 08:38:23,076 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 2843 transitions. [2021-11-07 08:38:23,076 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 2843 transitions. [2021-11-07 08:38:23,077 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 08:38:23,078 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 2843 transitions. [2021-11-07 08:38:23,083 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 60.48936170212766) internal successors, (2843), 47 states have internal predecessors, (2843), 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) [2021-11-07 08:38:23,089 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 83.0) internal successors, (3984), 48 states have internal predecessors, (3984), 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) [2021-11-07 08:38:23,090 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 83.0) internal successors, (3984), 48 states have internal predecessors, (3984), 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) [2021-11-07 08:38:23,091 INFO L186 Difference]: Start difference. First operand has 157 places, 215 transitions, 1377 flow. Second operand 47 states and 2843 transitions. [2021-11-07 08:38:23,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 601 transitions, 5682 flow [2021-11-07 08:38:23,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 601 transitions, 5620 flow, removed 15 selfloop flow, removed 7 redundant places. [2021-11-07 08:38:23,276 INFO L242 Difference]: Finished difference. Result has 216 places, 448 transitions, 4210 flow [2021-11-07 08:38:23,277 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=83, PETRI_DIFFERENCE_MINUEND_FLOW=1336, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=4210, PETRI_PLACES=216, PETRI_TRANSITIONS=448} [2021-11-07 08:38:23,277 INFO L334 CegarLoopForPetriNet]: 71 programPoint places, 145 predicate places. [2021-11-07 08:38:23,277 INFO L470 AbstractCegarLoop]: Abstraction has has 216 places, 448 transitions, 4210 flow [2021-11-07 08:38:23,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 57.8) internal successors, (867), 15 states have internal predecessors, (867), 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) [2021-11-07 08:38:23,278 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 08:38:23,278 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:38:23,300 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b1b864e-3deb-4a83-bd03-4f8a9dcb3dd5/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-11-07 08:38:23,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b1b864e-3deb-4a83-bd03-4f8a9dcb3dd5/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-07 08:38:23,486 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-11-07 08:38:23,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:38:23,487 INFO L85 PathProgramCache]: Analyzing trace with hash 528365504, now seen corresponding path program 1 times [2021-11-07 08:38:23,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:38:23,487 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217123160] [2021-11-07 08:38:23,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:38:23,487 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:38:23,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:38:23,545 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-07 08:38:23,545 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:38:23,545 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217123160] [2021-11-07 08:38:23,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217123160] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:38:23,546 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:38:23,546 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-07 08:38:23,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701947723] [2021-11-07 08:38:23,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 08:38:23,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:38:23,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 08:38:23,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-07 08:38:23,548 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 83 [2021-11-07 08:38:23,549 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 448 transitions, 4210 flow. Second operand has 7 states, 7 states have (on average 59.0) internal successors, (413), 7 states have internal predecessors, (413), 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) [2021-11-07 08:38:23,549 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 08:38:23,549 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 83 [2021-11-07 08:38:23,549 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 08:38:30,834 INFO L129 PetriNetUnfolder]: 14447/35805 cut-off events. [2021-11-07 08:38:30,834 INFO L130 PetriNetUnfolder]: For 471948/474138 co-relation queries the response was YES. [2021-11-07 08:38:31,183 INFO L84 FinitePrefix]: Finished finitePrefix Result has 168255 conditions, 35805 events. 14447/35805 cut-off events. For 471948/474138 co-relation queries the response was YES. Maximal size of possible extension queue 2069. Compared 425603 event pairs, 139 based on Foata normal form. 402/35950 useless extension candidates. Maximal degree in co-relation 68713. Up to 9652 conditions per place. [2021-11-07 08:38:31,377 INFO L132 encePairwiseOnDemand]: 70/83 looper letters, 254 selfloop transitions, 641 changer transitions 0/998 dead transitions. [2021-11-07 08:38:31,377 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 998 transitions, 12081 flow [2021-11-07 08:38:31,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-07 08:38:31,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-11-07 08:38:31,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1084 transitions. [2021-11-07 08:38:31,379 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7682494684620836 [2021-11-07 08:38:31,379 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1084 transitions. [2021-11-07 08:38:31,379 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1084 transitions. [2021-11-07 08:38:31,380 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 08:38:31,380 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1084 transitions. [2021-11-07 08:38:31,382 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 63.76470588235294) internal successors, (1084), 17 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) [2021-11-07 08:38:31,385 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 83.0) internal successors, (1494), 18 states have internal predecessors, (1494), 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) [2021-11-07 08:38:31,385 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 83.0) internal successors, (1494), 18 states have internal predecessors, (1494), 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) [2021-11-07 08:38:31,385 INFO L186 Difference]: Start difference. First operand has 216 places, 448 transitions, 4210 flow. Second operand 17 states and 1084 transitions. [2021-11-07 08:38:31,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 998 transitions, 12081 flow [2021-11-07 08:38:32,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 998 transitions, 11425 flow, removed 295 selfloop flow, removed 12 redundant places. [2021-11-07 08:38:32,890 INFO L242 Difference]: Finished difference. Result has 222 places, 864 transitions, 9385 flow [2021-11-07 08:38:32,891 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=83, PETRI_DIFFERENCE_MINUEND_FLOW=3854, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=226, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=9385, PETRI_PLACES=222, PETRI_TRANSITIONS=864} [2021-11-07 08:38:32,891 INFO L334 CegarLoopForPetriNet]: 71 programPoint places, 151 predicate places. [2021-11-07 08:38:32,891 INFO L470 AbstractCegarLoop]: Abstraction has has 222 places, 864 transitions, 9385 flow [2021-11-07 08:38:32,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 59.0) internal successors, (413), 7 states have internal predecessors, (413), 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) [2021-11-07 08:38:32,891 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 08:38:32,891 INFO L254 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:38:32,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-11-07 08:38:32,892 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0INUSE_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-11-07 08:38:32,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:38:32,892 INFO L85 PathProgramCache]: Analyzing trace with hash -812435506, now seen corresponding path program 1 times [2021-11-07 08:38:32,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:38:32,892 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069367860] [2021-11-07 08:38:32,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:38:32,892 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:38:32,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:38:33,033 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 88 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:38:33,033 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:38:33,033 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069367860] [2021-11-07 08:38:33,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069367860] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:38:33,034 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655460906] [2021-11-07 08:38:33,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:38:33,034 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:38:33,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b1b864e-3deb-4a83-bd03-4f8a9dcb3dd5/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:38:33,035 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b1b864e-3deb-4a83-bd03-4f8a9dcb3dd5/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:38:33,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b1b864e-3deb-4a83-bd03-4f8a9dcb3dd5/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-07 08:38:33,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:38:33,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-07 08:38:33,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:38:33,501 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 125 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:38:33,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655460906] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:38:33,501 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:38:33,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [13] total 15 [2021-11-07 08:38:33,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109619165] [2021-11-07 08:38:33,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-07 08:38:33,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:38:33,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-07 08:38:33,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-11-07 08:38:33,505 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 83 [2021-11-07 08:38:33,506 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 864 transitions, 9385 flow. Second operand has 13 states, 13 states have (on average 68.61538461538461) internal successors, (892), 13 states have internal predecessors, (892), 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) [2021-11-07 08:38:33,506 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 08:38:33,506 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 83 [2021-11-07 08:38:33,506 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 08:38:37,188 INFO L129 PetriNetUnfolder]: 4516/14845 cut-off events. [2021-11-07 08:38:37,188 INFO L130 PetriNetUnfolder]: For 335440/339734 co-relation queries the response was YES. [2021-11-07 08:38:37,357 INFO L84 FinitePrefix]: Finished finitePrefix Result has 91168 conditions, 14845 events. 4516/14845 cut-off events. For 335440/339734 co-relation queries the response was YES. Maximal size of possible extension queue 1055. Compared 178358 event pairs, 496 based on Foata normal form. 1553/15890 useless extension candidates. Maximal degree in co-relation 39339. Up to 4328 conditions per place. [2021-11-07 08:38:37,433 INFO L132 encePairwiseOnDemand]: 77/83 looper letters, 28 selfloop transitions, 113 changer transitions 0/874 dead transitions. [2021-11-07 08:38:37,433 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 874 transitions, 9773 flow [2021-11-07 08:38:37,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-07 08:38:37,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-11-07 08:38:37,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1223 transitions. [2021-11-07 08:38:37,435 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8186077643908969 [2021-11-07 08:38:37,435 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1223 transitions. [2021-11-07 08:38:37,435 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1223 transitions. [2021-11-07 08:38:37,436 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 08:38:37,436 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1223 transitions. [2021-11-07 08:38:37,438 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 67.94444444444444) internal successors, (1223), 18 states have internal predecessors, (1223), 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) [2021-11-07 08:38:37,441 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 83.0) internal successors, (1577), 19 states have internal predecessors, (1577), 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) [2021-11-07 08:38:37,441 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 83.0) internal successors, (1577), 19 states have internal predecessors, (1577), 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) [2021-11-07 08:38:37,441 INFO L186 Difference]: Start difference. First operand has 222 places, 864 transitions, 9385 flow. Second operand 18 states and 1223 transitions. [2021-11-07 08:38:37,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 874 transitions, 9773 flow [2021-11-07 08:38:40,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 874 transitions, 9616 flow, removed 70 selfloop flow, removed 4 redundant places. [2021-11-07 08:38:40,813 INFO L242 Difference]: Finished difference. Result has 236 places, 866 transitions, 9555 flow [2021-11-07 08:38:40,814 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=83, PETRI_DIFFERENCE_MINUEND_FLOW=9224, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=863, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=752, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=9555, PETRI_PLACES=236, PETRI_TRANSITIONS=866} [2021-11-07 08:38:40,814 INFO L334 CegarLoopForPetriNet]: 71 programPoint places, 165 predicate places. [2021-11-07 08:38:40,814 INFO L470 AbstractCegarLoop]: Abstraction has has 236 places, 866 transitions, 9555 flow [2021-11-07 08:38:40,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 68.61538461538461) internal successors, (892), 13 states have internal predecessors, (892), 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) [2021-11-07 08:38:40,815 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 08:38:40,815 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:38:40,840 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b1b864e-3deb-4a83-bd03-4f8a9dcb3dd5/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-11-07 08:38:41,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b1b864e-3deb-4a83-bd03-4f8a9dcb3dd5/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:38:41,018 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-11-07 08:38:41,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:38:41,019 INFO L85 PathProgramCache]: Analyzing trace with hash -525150678, now seen corresponding path program 1 times [2021-11-07 08:38:41,019 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:38:41,019 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080084041] [2021-11-07 08:38:41,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:38:41,019 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:38:41,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:38:41,161 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:38:41,161 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:38:41,162 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080084041] [2021-11-07 08:38:41,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080084041] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:38:41,162 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331237592] [2021-11-07 08:38:41,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:38:41,162 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:38:41,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b1b864e-3deb-4a83-bd03-4f8a9dcb3dd5/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:38:41,163 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b1b864e-3deb-4a83-bd03-4f8a9dcb3dd5/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:38:41,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b1b864e-3deb-4a83-bd03-4f8a9dcb3dd5/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-07 08:38:41,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:38:41,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 08:38:41,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:38:41,750 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:38:41,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331237592] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:38:41,751 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:38:41,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 19 [2021-11-07 08:38:41,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309804555] [2021-11-07 08:38:41,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-07 08:38:41,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:38:41,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-07 08:38:41,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-11-07 08:38:41,754 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 83 [2021-11-07 08:38:41,756 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 866 transitions, 9555 flow. Second operand has 19 states, 19 states have (on average 57.578947368421055) internal successors, (1094), 19 states have internal predecessors, (1094), 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) [2021-11-07 08:38:41,756 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 08:38:41,756 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 83 [2021-11-07 08:38:41,757 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 08:38:51,145 INFO L129 PetriNetUnfolder]: 17297/35454 cut-off events. [2021-11-07 08:38:51,145 INFO L130 PetriNetUnfolder]: For 729719/729722 co-relation queries the response was YES. [2021-11-07 08:38:51,566 INFO L84 FinitePrefix]: Finished finitePrefix Result has 214817 conditions, 35454 events. 17297/35454 cut-off events. For 729719/729722 co-relation queries the response was YES. Maximal size of possible extension queue 2039. Compared 361111 event pairs, 120 based on Foata normal form. 596/36013 useless extension candidates. Maximal degree in co-relation 172573. Up to 10839 conditions per place. [2021-11-07 08:38:51,595 INFO L132 encePairwiseOnDemand]: 68/83 looper letters, 0 selfloop transitions, 0 changer transitions 1941/1941 dead transitions. [2021-11-07 08:38:51,596 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 1941 transitions, 25769 flow [2021-11-07 08:38:51,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-11-07 08:38:51,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2021-11-07 08:38:51,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2462 transitions. [2021-11-07 08:38:51,599 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7234792829856009 [2021-11-07 08:38:51,599 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2462 transitions. [2021-11-07 08:38:51,600 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2462 transitions. [2021-11-07 08:38:51,601 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 08:38:51,601 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2462 transitions. [2021-11-07 08:38:51,605 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 60.048780487804876) internal successors, (2462), 41 states have internal predecessors, (2462), 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) [2021-11-07 08:38:51,610 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 83.0) internal successors, (3486), 42 states have internal predecessors, (3486), 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) [2021-11-07 08:38:51,612 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 83.0) internal successors, (3486), 42 states have internal predecessors, (3486), 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) [2021-11-07 08:38:51,612 INFO L186 Difference]: Start difference. First operand has 236 places, 866 transitions, 9555 flow. Second operand 41 states and 2462 transitions. [2021-11-07 08:38:51,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 1941 transitions, 25769 flow [2021-11-07 08:38:56,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 1941 transitions, 24678 flow, removed 265 selfloop flow, removed 34 redundant places. [2021-11-07 08:38:57,012 INFO L242 Difference]: Finished difference. Result has 240 places, 0 transitions, 0 flow [2021-11-07 08:38:57,013 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=83, PETRI_DIFFERENCE_MINUEND_FLOW=8855, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=863, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=863, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=0, PETRI_PLACES=240, PETRI_TRANSITIONS=0} [2021-11-07 08:38:57,013 INFO L334 CegarLoopForPetriNet]: 71 programPoint places, 169 predicate places. [2021-11-07 08:38:57,013 INFO L470 AbstractCegarLoop]: Abstraction has has 240 places, 0 transitions, 0 flow [2021-11-07 08:38:57,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 57.578947368421055) internal successors, (1094), 19 states have internal predecessors, (1094), 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) [2021-11-07 08:38:57,014 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 08:38:57,014 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION [2021-11-07 08:38:57,038 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b1b864e-3deb-4a83-bd03-4f8a9dcb3dd5/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-07 08:38:57,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b1b864e-3deb-4a83-bd03-4f8a9dcb3dd5/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:38:57,217 INFO L731 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:38:57,219 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 5 thread instances [2021-11-07 08:38:57,219 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-07 08:38:57,222 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 08:38:57 BasicIcfg [2021-11-07 08:38:57,222 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-07 08:38:57,223 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-07 08:38:57,223 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-07 08:38:57,223 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-07 08:38:57,224 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:37:58" (3/4) ... [2021-11-07 08:38:57,227 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-11-07 08:38:57,234 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread [2021-11-07 08:38:57,238 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2021-11-07 08:38:57,238 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-11-07 08:38:57,239 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-11-07 08:38:57,239 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-07 08:38:57,278 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b1b864e-3deb-4a83-bd03-4f8a9dcb3dd5/bin/uautomizer-AkOaLMaTGY/witness.graphml [2021-11-07 08:38:57,279 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-07 08:38:57,280 INFO L168 Benchmark]: Toolchain (without parser) took 59581.74 ms. Allocated memory was 113.2 MB in the beginning and 11.2 GB in the end (delta: 11.1 GB). Free memory was 75.3 MB in the beginning and 9.1 GB in the end (delta: -9.1 GB). Peak memory consumption was 2.0 GB. Max. memory is 16.1 GB. [2021-11-07 08:38:57,281 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 113.2 MB. Free memory was 92.9 MB in the beginning and 92.8 MB in the end (delta: 64.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 08:38:57,281 INFO L168 Benchmark]: CACSL2BoogieTranslator took 553.86 ms. Allocated memory is still 113.2 MB. Free memory was 75.1 MB in the beginning and 79.6 MB in the end (delta: -4.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-07 08:38:57,282 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.21 ms. Allocated memory is still 113.2 MB. Free memory was 79.6 MB in the beginning and 77.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-07 08:38:57,282 INFO L168 Benchmark]: Boogie Preprocessor took 27.49 ms. Allocated memory is still 113.2 MB. Free memory was 77.5 MB in the beginning and 76.3 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-07 08:38:57,282 INFO L168 Benchmark]: RCFGBuilder took 440.05 ms. Allocated memory is still 113.2 MB. Free memory was 76.3 MB in the beginning and 64.9 MB in the end (delta: 11.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-07 08:38:57,283 INFO L168 Benchmark]: TraceAbstraction took 58449.77 ms. Allocated memory was 113.2 MB in the beginning and 11.2 GB in the end (delta: 11.1 GB). Free memory was 64.5 MB in the beginning and 9.1 GB in the end (delta: -9.1 GB). Peak memory consumption was 2.2 GB. Max. memory is 16.1 GB. [2021-11-07 08:38:57,283 INFO L168 Benchmark]: Witness Printer took 55.58 ms. Allocated memory is still 11.2 GB. Free memory was 9.1 GB in the beginning and 9.1 GB in the end (delta: 2.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-11-07 08:38:57,286 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 113.2 MB. Free memory was 92.9 MB in the beginning and 92.8 MB in the end (delta: 64.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 553.86 ms. Allocated memory is still 113.2 MB. Free memory was 75.1 MB in the beginning and 79.6 MB in the end (delta: -4.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 42.21 ms. Allocated memory is still 113.2 MB. Free memory was 79.6 MB in the beginning and 77.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 27.49 ms. Allocated memory is still 113.2 MB. Free memory was 77.5 MB in the beginning and 76.3 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 440.05 ms. Allocated memory is still 113.2 MB. Free memory was 76.3 MB in the beginning and 64.9 MB in the end (delta: 11.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 58449.77 ms. Allocated memory was 113.2 MB in the beginning and 11.2 GB in the end (delta: 11.1 GB). Free memory was 64.5 MB in the beginning and 9.1 GB in the end (delta: -9.1 GB). Peak memory consumption was 2.2 GB. Max. memory is 16.1 GB. * Witness Printer took 55.58 ms. Allocated memory is still 11.2 GB. Free memory was 9.1 GB in the beginning and 9.1 GB in the end (delta: 2.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 727]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 3 procedures, 58 locations, 2 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 0.7s, OverallIterations: 4, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 8 SDtfs, 4 SDslu, 0 SDs, 0 SdLazy, 11 SolverSat, 1 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=89occurred in iteration=3, InterpolantAutomatonStates: 8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 102 NumberOfCodeBlocks, 102 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 67 ConstructedInterpolants, 0 QuantifiedInterpolants, 95 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 1/1 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data with 2 thread instances CFG has 4 procedures, 64 locations, 2 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 1.6s, OverallIterations: 4, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 26 SDtfs, 134 SDslu, 79 SDs, 0 SdLazy, 153 SolverSat, 26 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 64 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=354occurred in iteration=3, InterpolantAutomatonStates: 31, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 158 NumberOfCodeBlocks, 158 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 112 ConstructedInterpolants, 0 QuantifiedInterpolants, 206 SizeOfPredicates, 6 NumberOfNonLiveVariables, 88 ConjunctsInSsa, 8 ConjunctsInUnsatCore, 4 InterpolantComputations, 2 PerfectInterpolantSequences, 1/3 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data with 3 thread instances CFG has 5 procedures, 70 locations, 2 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 2.4s, OverallIterations: 6, TraceHistogramMax: 4, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 1.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 39 SDtfs, 253 SDslu, 110 SDs, 0 SdLazy, 254 SolverSat, 51 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 135 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 860 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=819occurred in iteration=5, InterpolantAutomatonStates: 57, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 274 NumberOfCodeBlocks, 274 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 215 ConstructedInterpolants, 0 QuantifiedInterpolants, 451 SizeOfPredicates, 6 NumberOfNonLiveVariables, 195 ConjunctsInSsa, 10 ConjunctsInUnsatCore, 7 InterpolantComputations, 3 PerfectInterpolantSequences, 7/27 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data with 4 thread instances CFG has 6 procedures, 76 locations, 2 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 7.8s, OverallIterations: 8, TraceHistogramMax: 5, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 5.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 121 SDtfs, 714 SDslu, 533 SDs, 0 SdLazy, 705 SolverSat, 99 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 314 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1944 ImplicationChecksByTransitivity, 1.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=3819occurred in iteration=7, InterpolantAutomatonStates: 127, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 496 NumberOfCodeBlocks, 496 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 423 ConstructedInterpolants, 0 QuantifiedInterpolants, 997 SizeOfPredicates, 24 NumberOfNonLiveVariables, 447 ConjunctsInSsa, 32 ConjunctsInUnsatCore, 11 InterpolantComputations, 3 PerfectInterpolantSequences, 13/159 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data with 5 thread instances CFG has 7 procedures, 82 locations, 2 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 45.4s, OverallIterations: 9, TraceHistogramMax: 6, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 40.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 215 SDtfs, 1236 SDslu, 948 SDs, 0 SdLazy, 1204 SolverSat, 144 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 555 GetRequests, 327 SyntacticMatches, 0 SemanticMatches, 228 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2703 ImplicationChecksByTransitivity, 2.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=9555occurred in iteration=8, InterpolantAutomatonStates: 201, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.7s InterpolantComputationTime, 767 NumberOfCodeBlocks, 767 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 752 ConstructedInterpolants, 0 QuantifiedInterpolants, 1826 SizeOfPredicates, 48 NumberOfNonLiveVariables, 771 ConjunctsInSsa, 60 ConjunctsInUnsatCore, 15 InterpolantComputations, 4 PerfectInterpolantSequences, 290/683 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-11-07 08:38:57,335 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b1b864e-3deb-4a83-bd03-4f8a9dcb3dd5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE