./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/openssl-simplified/s3_clnt_3.cil-3.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 57096758 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66a9aff1-53de-445f-bb86-51723f36ccaf/bin/uautomizer-hJ6jxDFKc3/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66a9aff1-53de-445f-bb86-51723f36ccaf/bin/uautomizer-hJ6jxDFKc3/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66a9aff1-53de-445f-bb86-51723f36ccaf/bin/uautomizer-hJ6jxDFKc3/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66a9aff1-53de-445f-bb86-51723f36ccaf/bin/uautomizer-hJ6jxDFKc3/config/AutomizerReach.xml -i ../../sv-benchmarks/c/openssl-simplified/s3_clnt_3.cil-3.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66a9aff1-53de-445f-bb86-51723f36ccaf/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66a9aff1-53de-445f-bb86-51723f36ccaf/bin/uautomizer-hJ6jxDFKc3 --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 aadd9b4740e26e55e1f412917f1b55fd46737adf .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-5709675 [2021-10-15 20:25:42,598 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-15 20:25:42,600 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-15 20:25:42,638 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-15 20:25:42,639 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-15 20:25:42,640 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-15 20:25:42,643 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-15 20:25:42,646 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-15 20:25:42,649 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-15 20:25:42,651 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-15 20:25:42,652 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-15 20:25:42,654 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-15 20:25:42,655 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-15 20:25:42,657 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-15 20:25:42,659 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-15 20:25:42,661 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-15 20:25:42,663 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-15 20:25:42,665 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-15 20:25:42,668 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-15 20:25:42,671 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-15 20:25:42,674 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-15 20:25:42,676 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-15 20:25:42,678 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-15 20:25:42,680 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-15 20:25:42,684 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-15 20:25:42,685 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-15 20:25:42,686 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-15 20:25:42,687 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-15 20:25:42,688 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-15 20:25:42,690 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-15 20:25:42,695 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-15 20:25:42,697 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-15 20:25:42,698 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-15 20:25:42,700 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-15 20:25:42,702 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-15 20:25:42,703 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-15 20:25:42,705 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-15 20:25:42,706 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-15 20:25:42,706 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-15 20:25:42,708 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-15 20:25:42,709 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-15 20:25:42,710 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66a9aff1-53de-445f-bb86-51723f36ccaf/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-15 20:25:42,771 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-15 20:25:42,771 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-15 20:25:42,772 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-15 20:25:42,773 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-15 20:25:42,782 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-15 20:25:42,783 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-15 20:25:42,783 INFO L138 SettingsManager]: * Use SBE=true [2021-10-15 20:25:42,783 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-15 20:25:42,784 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-15 20:25:42,784 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-15 20:25:42,785 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-15 20:25:42,786 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-15 20:25:42,786 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-15 20:25:42,787 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-15 20:25:42,787 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-15 20:25:42,787 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-15 20:25:42,787 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-15 20:25:42,788 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-15 20:25:42,788 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-15 20:25:42,788 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-15 20:25:42,789 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-15 20:25:42,789 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-15 20:25:42,789 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 20:25:42,790 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-15 20:25:42,790 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-15 20:25:42,790 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-15 20:25:42,790 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-15 20:25:42,791 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-15 20:25:42,791 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-15 20:25:42,793 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-15 20:25:42,793 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-15 20:25:42,794 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-15 20:25:42,794 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_66a9aff1-53de-445f-bb86-51723f36ccaf/bin/uautomizer-hJ6jxDFKc3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66a9aff1-53de-445f-bb86-51723f36ccaf/bin/uautomizer-hJ6jxDFKc3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> aadd9b4740e26e55e1f412917f1b55fd46737adf [2021-10-15 20:25:43,202 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-15 20:25:43,247 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-15 20:25:43,250 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-15 20:25:43,252 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-15 20:25:43,253 INFO L275 PluginConnector]: CDTParser initialized [2021-10-15 20:25:43,254 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66a9aff1-53de-445f-bb86-51723f36ccaf/bin/uautomizer-hJ6jxDFKc3/../../sv-benchmarks/c/openssl-simplified/s3_clnt_3.cil-3.c [2021-10-15 20:25:43,354 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66a9aff1-53de-445f-bb86-51723f36ccaf/bin/uautomizer-hJ6jxDFKc3/data/113fb6cce/ae99721ebab2492187ef643c2ed4fb22/FLAGd3fc73afc [2021-10-15 20:25:44,022 INFO L306 CDTParser]: Found 1 translation units. [2021-10-15 20:25:44,023 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66a9aff1-53de-445f-bb86-51723f36ccaf/sv-benchmarks/c/openssl-simplified/s3_clnt_3.cil-3.c [2021-10-15 20:25:44,035 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66a9aff1-53de-445f-bb86-51723f36ccaf/bin/uautomizer-hJ6jxDFKc3/data/113fb6cce/ae99721ebab2492187ef643c2ed4fb22/FLAGd3fc73afc [2021-10-15 20:25:44,330 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66a9aff1-53de-445f-bb86-51723f36ccaf/bin/uautomizer-hJ6jxDFKc3/data/113fb6cce/ae99721ebab2492187ef643c2ed4fb22 [2021-10-15 20:25:44,334 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-15 20:25:44,335 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-15 20:25:44,338 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-15 20:25:44,339 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-15 20:25:44,342 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-15 20:25:44,343 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 08:25:44" (1/1) ... [2021-10-15 20:25:44,344 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e238583 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:25:44, skipping insertion in model container [2021-10-15 20:25:44,345 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 08:25:44" (1/1) ... [2021-10-15 20:25:44,353 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-15 20:25:44,413 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-15 20:25:44,660 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_66a9aff1-53de-445f-bb86-51723f36ccaf/sv-benchmarks/c/openssl-simplified/s3_clnt_3.cil-3.c[37543,37556] [2021-10-15 20:25:44,668 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 20:25:44,677 INFO L203 MainTranslator]: Completed pre-run [2021-10-15 20:25:44,734 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_66a9aff1-53de-445f-bb86-51723f36ccaf/sv-benchmarks/c/openssl-simplified/s3_clnt_3.cil-3.c[37543,37556] [2021-10-15 20:25:44,738 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 20:25:44,767 INFO L208 MainTranslator]: Completed translation [2021-10-15 20:25:44,767 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:25:44 WrapperNode [2021-10-15 20:25:44,768 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-15 20:25:44,769 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-15 20:25:44,769 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-15 20:25:44,769 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-15 20:25:44,788 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:25:44" (1/1) ... [2021-10-15 20:25:44,799 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:25:44" (1/1) ... [2021-10-15 20:25:44,863 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-15 20:25:44,864 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-15 20:25:44,864 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-15 20:25:44,864 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-15 20:25:44,873 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:25:44" (1/1) ... [2021-10-15 20:25:44,873 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:25:44" (1/1) ... [2021-10-15 20:25:44,879 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:25:44" (1/1) ... [2021-10-15 20:25:44,879 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:25:44" (1/1) ... [2021-10-15 20:25:44,921 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:25:44" (1/1) ... [2021-10-15 20:25:44,928 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:25:44" (1/1) ... [2021-10-15 20:25:44,931 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:25:44" (1/1) ... [2021-10-15 20:25:44,946 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-15 20:25:44,947 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-15 20:25:44,947 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-15 20:25:44,948 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-15 20:25:44,955 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:25:44" (1/1) ... [2021-10-15 20:25:44,976 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 20:25:44,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66a9aff1-53de-445f-bb86-51723f36ccaf/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:25:45,004 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66a9aff1-53de-445f-bb86-51723f36ccaf/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-15 20:25:45,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66a9aff1-53de-445f-bb86-51723f36ccaf/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-15 20:25:45,051 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-15 20:25:45,051 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-15 20:25:45,051 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-15 20:25:45,051 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-15 20:25:45,204 WARN L805 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-10-15 20:25:45,870 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##85: assume !false; [2021-10-15 20:25:45,871 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##84: assume false; [2021-10-15 20:25:45,884 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-15 20:25:45,885 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-15 20:25:45,887 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 08:25:45 BoogieIcfgContainer [2021-10-15 20:25:45,887 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-15 20:25:45,890 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-15 20:25:45,890 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-15 20:25:45,898 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-15 20:25:45,898 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 08:25:44" (1/3) ... [2021-10-15 20:25:45,899 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13c7ff67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 08:25:45, skipping insertion in model container [2021-10-15 20:25:45,899 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:25:44" (2/3) ... [2021-10-15 20:25:45,900 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13c7ff67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 08:25:45, skipping insertion in model container [2021-10-15 20:25:45,900 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 08:25:45" (3/3) ... [2021-10-15 20:25:45,901 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_clnt_3.cil-3.c [2021-10-15 20:25:45,908 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-15 20:25:45,908 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-15 20:25:45,952 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-15 20:25:45,958 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, mConcurrency=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 [2021-10-15 20:25:45,958 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-15 20:25:45,976 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 128 places, 216 transitions, 432 flow [2021-10-15 20:25:46,032 INFO L129 PetriNetUnfolder]: 89/216 cut-off events. [2021-10-15 20:25:46,032 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 20:25:46,034 INFO L84 FinitePrefix]: Finished finitePrefix Result has 217 conditions, 216 events. 89/216 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 370 event pairs, 0 based on Foata normal form. 0/126 useless extension candidates. Maximal degree in co-relation 0. Up to 27 conditions per place. [2021-10-15 20:25:46,034 INFO L82 GeneralOperation]: Start removeDead. Operand has 128 places, 216 transitions, 432 flow [2021-10-15 20:25:46,043 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 112 places, 169 transitions, 338 flow [2021-10-15 20:25:46,056 INFO L129 PetriNetUnfolder]: 35/102 cut-off events. [2021-10-15 20:25:46,056 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 20:25:46,056 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:25:46,057 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] [2021-10-15 20:25:46,058 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:25:46,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:25:46,064 INFO L82 PathProgramCache]: Analyzing trace with hash -1457695038, now seen corresponding path program 1 times [2021-10-15 20:25:46,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:25:46,074 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419002914] [2021-10-15 20:25:46,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:25:46,076 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:25:46,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:25:46,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:25:46,360 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:25:46,360 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419002914] [2021-10-15 20:25:46,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419002914] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:25:46,361 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:25:46,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 20:25:46,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44373875] [2021-10-15 20:25:46,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:25:46,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:25:46,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:25:46,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 20:25:46,393 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 216 [2021-10-15 20:25:46,398 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 169 transitions, 338 flow. Second operand has 3 states, 3 states have (on average 128.33333333333334) internal successors, (385), 3 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:46,399 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:25:46,399 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 216 [2021-10-15 20:25:46,400 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:25:46,677 INFO L129 PetriNetUnfolder]: 58/172 cut-off events. [2021-10-15 20:25:46,678 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 20:25:46,679 INFO L84 FinitePrefix]: Finished finitePrefix Result has 263 conditions, 172 events. 58/172 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 231 event pairs, 0 based on Foata normal form. 0/115 useless extension candidates. Maximal degree in co-relation 11. Up to 86 conditions per place. [2021-10-15 20:25:46,683 INFO L132 encePairwiseOnDemand]: 212/216 looper letters, 86 selfloop transitions, 3 changer transitions 0/171 dead transitions. [2021-10-15 20:25:46,683 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 171 transitions, 520 flow [2021-10-15 20:25:46,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:25:46,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:25:46,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 459 transitions. [2021-10-15 20:25:46,702 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7083333333333334 [2021-10-15 20:25:46,703 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 459 transitions. [2021-10-15 20:25:46,703 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 459 transitions. [2021-10-15 20:25:46,706 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:25:46,708 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 459 transitions. [2021-10-15 20:25:46,713 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 153.0) internal successors, (459), 3 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:46,723 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:46,724 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:46,726 INFO L186 Difference]: Start difference. First operand has 112 places, 169 transitions, 338 flow. Second operand 3 states and 459 transitions. [2021-10-15 20:25:46,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 171 transitions, 520 flow [2021-10-15 20:25:46,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 171 transitions, 520 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 20:25:46,739 INFO L242 Difference]: Finished difference. Result has 116 places, 170 transitions, 356 flow [2021-10-15 20:25:46,741 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=338, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=356, PETRI_PLACES=116, PETRI_TRANSITIONS=170} [2021-10-15 20:25:46,742 INFO L334 CegarLoopForPetriNet]: 112 programPoint places, 4 predicate places. [2021-10-15 20:25:46,743 INFO L470 AbstractCegarLoop]: Abstraction has has 116 places, 170 transitions, 356 flow [2021-10-15 20:25:46,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 128.33333333333334) internal successors, (385), 3 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:46,743 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:25:46,744 INFO L254 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:25:46,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-15 20:25:46,759 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:25:46,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:25:46,761 INFO L82 PathProgramCache]: Analyzing trace with hash 561717339, now seen corresponding path program 1 times [2021-10-15 20:25:46,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:25:46,761 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135779973] [2021-10-15 20:25:46,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:25:46,762 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:25:46,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:25:46,949 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:25:46,950 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:25:46,950 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135779973] [2021-10-15 20:25:46,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135779973] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:25:46,952 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:25:46,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 20:25:46,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656224450] [2021-10-15 20:25:46,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:25:46,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:25:46,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:25:46,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 20:25:46,960 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 216 [2021-10-15 20:25:46,961 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 170 transitions, 356 flow. Second operand has 3 states, 3 states have (on average 129.66666666666666) internal successors, (389), 3 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:46,962 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:25:46,962 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 216 [2021-10-15 20:25:46,962 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:25:47,146 INFO L129 PetriNetUnfolder]: 64/196 cut-off events. [2021-10-15 20:25:47,146 INFO L130 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2021-10-15 20:25:47,150 INFO L84 FinitePrefix]: Finished finitePrefix Result has 308 conditions, 196 events. 64/196 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 248 event pairs, 0 based on Foata normal form. 1/135 useless extension candidates. Maximal degree in co-relation 276. Up to 89 conditions per place. [2021-10-15 20:25:47,154 INFO L132 encePairwiseOnDemand]: 207/216 looper letters, 95 selfloop transitions, 3 changer transitions 0/180 dead transitions. [2021-10-15 20:25:47,155 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 180 transitions, 574 flow [2021-10-15 20:25:47,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:25:47,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:25:47,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 472 transitions. [2021-10-15 20:25:47,166 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7283950617283951 [2021-10-15 20:25:47,170 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 472 transitions. [2021-10-15 20:25:47,171 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 472 transitions. [2021-10-15 20:25:47,171 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:25:47,171 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 472 transitions. [2021-10-15 20:25:47,174 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 157.33333333333334) internal successors, (472), 3 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:47,180 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:47,181 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:47,181 INFO L186 Difference]: Start difference. First operand has 116 places, 170 transitions, 356 flow. Second operand 3 states and 472 transitions. [2021-10-15 20:25:47,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 180 transitions, 574 flow [2021-10-15 20:25:47,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 180 transitions, 568 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 20:25:47,190 INFO L242 Difference]: Finished difference. Result has 118 places, 172 transitions, 382 flow [2021-10-15 20:25:47,191 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=350, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=382, PETRI_PLACES=118, PETRI_TRANSITIONS=172} [2021-10-15 20:25:47,192 INFO L334 CegarLoopForPetriNet]: 112 programPoint places, 6 predicate places. [2021-10-15 20:25:47,192 INFO L470 AbstractCegarLoop]: Abstraction has has 118 places, 172 transitions, 382 flow [2021-10-15 20:25:47,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 129.66666666666666) internal successors, (389), 3 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:47,193 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:25:47,194 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1] [2021-10-15 20:25:47,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-15 20:25:47,194 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:25:47,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:25:47,195 INFO L82 PathProgramCache]: Analyzing trace with hash 441295008, now seen corresponding path program 1 times [2021-10-15 20:25:47,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:25:47,196 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142032906] [2021-10-15 20:25:47,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:25:47,196 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:25:47,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:25:47,278 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-15 20:25:47,279 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:25:47,279 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142032906] [2021-10-15 20:25:47,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142032906] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:25:47,280 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:25:47,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 20:25:47,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326439814] [2021-10-15 20:25:47,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:25:47,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:25:47,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:25:47,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 20:25:47,284 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 216 [2021-10-15 20:25:47,285 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 172 transitions, 382 flow. Second operand has 3 states, 3 states have (on average 201.0) internal successors, (603), 3 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:47,285 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:25:47,285 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 216 [2021-10-15 20:25:47,285 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:25:47,327 INFO L129 PetriNetUnfolder]: 71/230 cut-off events. [2021-10-15 20:25:47,328 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2021-10-15 20:25:47,328 INFO L84 FinitePrefix]: Finished finitePrefix Result has 276 conditions, 230 events. 71/230 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 395 event pairs, 0 based on Foata normal form. 0/165 useless extension candidates. Maximal degree in co-relation 178. Up to 16 conditions per place. [2021-10-15 20:25:47,330 INFO L132 encePairwiseOnDemand]: 213/216 looper letters, 12 selfloop transitions, 2 changer transitions 0/173 dead transitions. [2021-10-15 20:25:47,330 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 173 transitions, 412 flow [2021-10-15 20:25:47,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:25:47,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:25:47,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 615 transitions. [2021-10-15 20:25:47,334 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9490740740740741 [2021-10-15 20:25:47,334 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 615 transitions. [2021-10-15 20:25:47,334 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 615 transitions. [2021-10-15 20:25:47,335 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:25:47,335 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 615 transitions. [2021-10-15 20:25:47,337 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 205.0) internal successors, (615), 3 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:47,340 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:47,341 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:47,341 INFO L186 Difference]: Start difference. First operand has 118 places, 172 transitions, 382 flow. Second operand 3 states and 615 transitions. [2021-10-15 20:25:47,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 173 transitions, 412 flow [2021-10-15 20:25:47,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 173 transitions, 406 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 20:25:47,348 INFO L242 Difference]: Finished difference. Result has 119 places, 173 transitions, 388 flow [2021-10-15 20:25:47,349 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=376, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=388, PETRI_PLACES=119, PETRI_TRANSITIONS=173} [2021-10-15 20:25:47,349 INFO L334 CegarLoopForPetriNet]: 112 programPoint places, 7 predicate places. [2021-10-15 20:25:47,350 INFO L470 AbstractCegarLoop]: Abstraction has has 119 places, 173 transitions, 388 flow [2021-10-15 20:25:47,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 201.0) internal successors, (603), 3 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:47,351 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:25:47,351 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1] [2021-10-15 20:25:47,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-15 20:25:47,352 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:25:47,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:25:47,352 INFO L82 PathProgramCache]: Analyzing trace with hash 575308514, now seen corresponding path program 1 times [2021-10-15 20:25:47,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:25:47,353 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789099380] [2021-10-15 20:25:47,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:25:47,354 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:25:47,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:25:47,412 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-15 20:25:47,412 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:25:47,412 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789099380] [2021-10-15 20:25:47,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789099380] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:25:47,413 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:25:47,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 20:25:47,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833277706] [2021-10-15 20:25:47,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:25:47,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:25:47,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:25:47,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 20:25:47,417 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 216 [2021-10-15 20:25:47,418 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 173 transitions, 388 flow. Second operand has 3 states, 3 states have (on average 132.0) internal successors, (396), 3 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:47,418 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:25:47,418 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 216 [2021-10-15 20:25:47,419 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:25:47,607 INFO L129 PetriNetUnfolder]: 79/260 cut-off events. [2021-10-15 20:25:47,607 INFO L130 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2021-10-15 20:25:47,607 INFO L84 FinitePrefix]: Finished finitePrefix Result has 419 conditions, 260 events. 79/260 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 408 event pairs, 0 based on Foata normal form. 5/192 useless extension candidates. Maximal degree in co-relation 342. Up to 110 conditions per place. [2021-10-15 20:25:47,612 INFO L132 encePairwiseOnDemand]: 204/216 looper letters, 98 selfloop transitions, 5 changer transitions 0/186 dead transitions. [2021-10-15 20:25:47,612 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 186 transitions, 624 flow [2021-10-15 20:25:47,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:25:47,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:25:47,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 477 transitions. [2021-10-15 20:25:47,615 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7361111111111112 [2021-10-15 20:25:47,615 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 477 transitions. [2021-10-15 20:25:47,615 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 477 transitions. [2021-10-15 20:25:47,616 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:25:47,616 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 477 transitions. [2021-10-15 20:25:47,618 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 159.0) internal successors, (477), 3 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) [2021-10-15 20:25:47,621 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:47,621 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:47,622 INFO L186 Difference]: Start difference. First operand has 119 places, 173 transitions, 388 flow. Second operand 3 states and 477 transitions. [2021-10-15 20:25:47,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 186 transitions, 624 flow [2021-10-15 20:25:47,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 186 transitions, 622 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 20:25:47,631 INFO L242 Difference]: Finished difference. Result has 122 places, 176 transitions, 434 flow [2021-10-15 20:25:47,631 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=386, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=434, PETRI_PLACES=122, PETRI_TRANSITIONS=176} [2021-10-15 20:25:47,632 INFO L334 CegarLoopForPetriNet]: 112 programPoint places, 10 predicate places. [2021-10-15 20:25:47,632 INFO L470 AbstractCegarLoop]: Abstraction has has 122 places, 176 transitions, 434 flow [2021-10-15 20:25:47,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 132.0) internal successors, (396), 3 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:47,633 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:25:47,633 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:25:47,633 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-15 20:25:47,634 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:25:47,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:25:47,634 INFO L82 PathProgramCache]: Analyzing trace with hash 1211569364, now seen corresponding path program 1 times [2021-10-15 20:25:47,634 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:25:47,635 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164143928] [2021-10-15 20:25:47,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:25:47,636 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:25:47,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:25:47,779 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-15 20:25:47,780 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:25:47,780 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164143928] [2021-10-15 20:25:47,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164143928] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:25:47,780 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:25:47,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 20:25:47,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14310219] [2021-10-15 20:25:47,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:25:47,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:25:47,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:25:47,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 20:25:47,785 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 216 [2021-10-15 20:25:47,786 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 176 transitions, 434 flow. Second operand has 3 states, 3 states have (on average 133.33333333333334) internal successors, (400), 3 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:47,786 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:25:47,786 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 216 [2021-10-15 20:25:47,786 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:25:48,091 INFO L129 PetriNetUnfolder]: 90/322 cut-off events. [2021-10-15 20:25:48,091 INFO L130 PetriNetUnfolder]: For 40/40 co-relation queries the response was YES. [2021-10-15 20:25:48,092 INFO L84 FinitePrefix]: Finished finitePrefix Result has 553 conditions, 322 events. 90/322 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 700 event pairs, 0 based on Foata normal form. 6/249 useless extension candidates. Maximal degree in co-relation 463. Up to 115 conditions per place. [2021-10-15 20:25:48,095 INFO L132 encePairwiseOnDemand]: 178/216 looper letters, 120 selfloop transitions, 12 changer transitions 1/216 dead transitions. [2021-10-15 20:25:48,095 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 216 transitions, 802 flow [2021-10-15 20:25:48,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:25:48,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:25:48,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 523 transitions. [2021-10-15 20:25:48,098 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8070987654320988 [2021-10-15 20:25:48,099 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 523 transitions. [2021-10-15 20:25:48,099 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 523 transitions. [2021-10-15 20:25:48,099 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:25:48,100 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 523 transitions. [2021-10-15 20:25:48,102 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 174.33333333333334) internal successors, (523), 3 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:48,105 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:48,106 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:48,106 INFO L186 Difference]: Start difference. First operand has 122 places, 176 transitions, 434 flow. Second operand 3 states and 523 transitions. [2021-10-15 20:25:48,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 216 transitions, 802 flow [2021-10-15 20:25:48,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 216 transitions, 792 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 20:25:48,116 INFO L242 Difference]: Finished difference. Result has 124 places, 182 transitions, 566 flow [2021-10-15 20:25:48,117 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=424, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=566, PETRI_PLACES=124, PETRI_TRANSITIONS=182} [2021-10-15 20:25:48,117 INFO L334 CegarLoopForPetriNet]: 112 programPoint places, 12 predicate places. [2021-10-15 20:25:48,117 INFO L470 AbstractCegarLoop]: Abstraction has has 124 places, 182 transitions, 566 flow [2021-10-15 20:25:48,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 133.33333333333334) internal successors, (400), 3 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:48,118 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:25:48,118 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:25:48,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-15 20:25:48,119 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:25:48,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:25:48,120 INFO L82 PathProgramCache]: Analyzing trace with hash -593868970, now seen corresponding path program 1 times [2021-10-15 20:25:48,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:25:48,120 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84242288] [2021-10-15 20:25:48,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:25:48,121 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:25:48,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:25:48,195 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-15 20:25:48,197 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:25:48,198 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84242288] [2021-10-15 20:25:48,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84242288] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:25:48,199 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:25:48,199 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 20:25:48,199 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74895091] [2021-10-15 20:25:48,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:25:48,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:25:48,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:25:48,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 20:25:48,206 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 216 [2021-10-15 20:25:48,207 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 182 transitions, 566 flow. Second operand has 3 states, 3 states have (on average 133.33333333333334) internal successors, (400), 3 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:48,207 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:25:48,207 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 216 [2021-10-15 20:25:48,207 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:25:48,416 INFO L129 PetriNetUnfolder]: 97/353 cut-off events. [2021-10-15 20:25:48,417 INFO L130 PetriNetUnfolder]: For 126/126 co-relation queries the response was YES. [2021-10-15 20:25:48,418 INFO L84 FinitePrefix]: Finished finitePrefix Result has 658 conditions, 353 events. 97/353 cut-off events. For 126/126 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 685 event pairs, 0 based on Foata normal form. 10/304 useless extension candidates. Maximal degree in co-relation 563. Up to 162 conditions per place. [2021-10-15 20:25:48,421 INFO L132 encePairwiseOnDemand]: 203/216 looper letters, 109 selfloop transitions, 4 changer transitions 0/196 dead transitions. [2021-10-15 20:25:48,421 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 196 transitions, 828 flow [2021-10-15 20:25:48,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:25:48,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:25:48,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 480 transitions. [2021-10-15 20:25:48,425 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7407407407407407 [2021-10-15 20:25:48,425 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 480 transitions. [2021-10-15 20:25:48,425 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 480 transitions. [2021-10-15 20:25:48,426 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:25:48,426 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 480 transitions. [2021-10-15 20:25:48,429 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 160.0) internal successors, (480), 3 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:48,432 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:48,433 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:48,434 INFO L186 Difference]: Start difference. First operand has 124 places, 182 transitions, 566 flow. Second operand 3 states and 480 transitions. [2021-10-15 20:25:48,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 196 transitions, 828 flow [2021-10-15 20:25:48,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 196 transitions, 804 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 20:25:48,450 INFO L242 Difference]: Finished difference. Result has 126 places, 184 transitions, 588 flow [2021-10-15 20:25:48,451 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=542, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=588, PETRI_PLACES=126, PETRI_TRANSITIONS=184} [2021-10-15 20:25:48,451 INFO L334 CegarLoopForPetriNet]: 112 programPoint places, 14 predicate places. [2021-10-15 20:25:48,452 INFO L470 AbstractCegarLoop]: Abstraction has has 126 places, 184 transitions, 588 flow [2021-10-15 20:25:48,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 133.33333333333334) internal successors, (400), 3 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:48,454 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:25:48,454 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:25:48,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-15 20:25:48,455 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:25:48,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:25:48,455 INFO L82 PathProgramCache]: Analyzing trace with hash 1861766894, now seen corresponding path program 1 times [2021-10-15 20:25:48,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:25:48,456 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179317325] [2021-10-15 20:25:48,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:25:48,457 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:25:48,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:25:48,575 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-10-15 20:25:48,575 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:25:48,576 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179317325] [2021-10-15 20:25:48,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179317325] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:25:48,576 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:25:48,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 20:25:48,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362251881] [2021-10-15 20:25:48,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:25:48,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:25:48,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:25:48,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 20:25:48,581 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 216 [2021-10-15 20:25:48,582 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 184 transitions, 588 flow. Second operand has 3 states, 3 states have (on average 134.66666666666666) internal successors, (404), 3 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:48,582 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:25:48,583 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 216 [2021-10-15 20:25:48,583 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:25:48,865 INFO L129 PetriNetUnfolder]: 103/383 cut-off events. [2021-10-15 20:25:48,865 INFO L130 PetriNetUnfolder]: For 157/157 co-relation queries the response was YES. [2021-10-15 20:25:48,866 INFO L84 FinitePrefix]: Finished finitePrefix Result has 718 conditions, 383 events. 103/383 cut-off events. For 157/157 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 652 event pairs, 0 based on Foata normal form. 12/330 useless extension candidates. Maximal degree in co-relation 624. Up to 176 conditions per place. [2021-10-15 20:25:48,869 INFO L132 encePairwiseOnDemand]: 201/216 looper letters, 113 selfloop transitions, 4 changer transitions 0/200 dead transitions. [2021-10-15 20:25:48,869 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 200 transitions, 864 flow [2021-10-15 20:25:48,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:25:48,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:25:48,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 484 transitions. [2021-10-15 20:25:48,876 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7469135802469136 [2021-10-15 20:25:48,876 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 484 transitions. [2021-10-15 20:25:48,877 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 484 transitions. [2021-10-15 20:25:48,877 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:25:48,877 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 484 transitions. [2021-10-15 20:25:48,879 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 161.33333333333334) internal successors, (484), 3 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:48,882 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:48,882 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:48,882 INFO L186 Difference]: Start difference. First operand has 126 places, 184 transitions, 588 flow. Second operand 3 states and 484 transitions. [2021-10-15 20:25:48,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 200 transitions, 864 flow [2021-10-15 20:25:48,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 200 transitions, 854 flow, removed 1 selfloop flow, removed 2 redundant places. [2021-10-15 20:25:48,896 INFO L242 Difference]: Finished difference. Result has 128 places, 186 transitions, 628 flow [2021-10-15 20:25:48,896 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=578, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=628, PETRI_PLACES=128, PETRI_TRANSITIONS=186} [2021-10-15 20:25:48,897 INFO L334 CegarLoopForPetriNet]: 112 programPoint places, 16 predicate places. [2021-10-15 20:25:48,897 INFO L470 AbstractCegarLoop]: Abstraction has has 128 places, 186 transitions, 628 flow [2021-10-15 20:25:48,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 134.66666666666666) internal successors, (404), 3 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:48,898 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:25:48,898 INFO L254 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:25:48,898 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-15 20:25:48,898 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:25:48,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:25:48,899 INFO L82 PathProgramCache]: Analyzing trace with hash -309488732, now seen corresponding path program 1 times [2021-10-15 20:25:48,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:25:48,900 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048824057] [2021-10-15 20:25:48,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:25:48,901 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:25:48,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:25:49,002 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-10-15 20:25:49,003 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:25:49,003 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048824057] [2021-10-15 20:25:49,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048824057] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:25:49,004 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:25:49,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 20:25:49,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743698364] [2021-10-15 20:25:49,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:25:49,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:25:49,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:25:49,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 20:25:49,008 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 216 [2021-10-15 20:25:49,010 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 186 transitions, 628 flow. Second operand has 3 states, 3 states have (on average 201.66666666666666) internal successors, (605), 3 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:49,010 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:25:49,010 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 216 [2021-10-15 20:25:49,010 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:25:49,165 INFO L129 PetriNetUnfolder]: 184/704 cut-off events. [2021-10-15 20:25:49,165 INFO L130 PetriNetUnfolder]: For 242/242 co-relation queries the response was YES. [2021-10-15 20:25:49,169 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1038 conditions, 704 events. 184/704 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 2253 event pairs, 0 based on Foata normal form. 0/594 useless extension candidates. Maximal degree in co-relation 908. Up to 69 conditions per place. [2021-10-15 20:25:49,172 INFO L132 encePairwiseOnDemand]: 209/216 looper letters, 18 selfloop transitions, 2 changer transitions 0/192 dead transitions. [2021-10-15 20:25:49,173 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 192 transitions, 682 flow [2021-10-15 20:25:49,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:25:49,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:25:49,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 625 transitions. [2021-10-15 20:25:49,176 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9645061728395061 [2021-10-15 20:25:49,176 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 625 transitions. [2021-10-15 20:25:49,176 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 625 transitions. [2021-10-15 20:25:49,177 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:25:49,177 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 625 transitions. [2021-10-15 20:25:49,180 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 208.33333333333334) internal successors, (625), 3 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:49,182 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:49,183 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:49,183 INFO L186 Difference]: Start difference. First operand has 128 places, 186 transitions, 628 flow. Second operand 3 states and 625 transitions. [2021-10-15 20:25:49,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 192 transitions, 682 flow [2021-10-15 20:25:49,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 192 transitions, 672 flow, removed 1 selfloop flow, removed 2 redundant places. [2021-10-15 20:25:49,192 INFO L242 Difference]: Finished difference. Result has 129 places, 187 transitions, 638 flow [2021-10-15 20:25:49,193 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=618, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=638, PETRI_PLACES=129, PETRI_TRANSITIONS=187} [2021-10-15 20:25:49,193 INFO L334 CegarLoopForPetriNet]: 112 programPoint places, 17 predicate places. [2021-10-15 20:25:49,194 INFO L470 AbstractCegarLoop]: Abstraction has has 129 places, 187 transitions, 638 flow [2021-10-15 20:25:49,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 201.66666666666666) internal successors, (605), 3 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:49,194 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:25:49,195 INFO L254 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:25:49,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-15 20:25:49,195 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:25:49,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:25:49,196 INFO L82 PathProgramCache]: Analyzing trace with hash 1409792251, now seen corresponding path program 1 times [2021-10-15 20:25:49,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:25:49,196 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319002172] [2021-10-15 20:25:49,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:25:49,196 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:25:49,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:25:49,258 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-10-15 20:25:49,258 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:25:49,259 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319002172] [2021-10-15 20:25:49,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319002172] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:25:49,260 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:25:49,260 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 20:25:49,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260539358] [2021-10-15 20:25:49,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:25:49,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:25:49,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:25:49,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 20:25:49,263 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 216 [2021-10-15 20:25:49,265 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 187 transitions, 638 flow. Second operand has 3 states, 3 states have (on average 202.0) internal successors, (606), 3 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:49,265 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:25:49,265 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 216 [2021-10-15 20:25:49,265 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:25:49,394 INFO L129 PetriNetUnfolder]: 190/732 cut-off events. [2021-10-15 20:25:49,395 INFO L130 PetriNetUnfolder]: For 250/250 co-relation queries the response was YES. [2021-10-15 20:25:49,397 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1083 conditions, 732 events. 190/732 cut-off events. For 250/250 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2317 event pairs, 1 based on Foata normal form. 1/626 useless extension candidates. Maximal degree in co-relation 917. Up to 70 conditions per place. [2021-10-15 20:25:49,400 INFO L132 encePairwiseOnDemand]: 213/216 looper letters, 13 selfloop transitions, 3 changer transitions 0/188 dead transitions. [2021-10-15 20:25:49,401 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 188 transitions, 675 flow [2021-10-15 20:25:49,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:25:49,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:25:49,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 615 transitions. [2021-10-15 20:25:49,404 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9490740740740741 [2021-10-15 20:25:49,404 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 615 transitions. [2021-10-15 20:25:49,404 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 615 transitions. [2021-10-15 20:25:49,405 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:25:49,405 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 615 transitions. [2021-10-15 20:25:49,408 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 205.0) internal successors, (615), 3 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:49,410 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:49,411 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:49,411 INFO L186 Difference]: Start difference. First operand has 129 places, 187 transitions, 638 flow. Second operand 3 states and 615 transitions. [2021-10-15 20:25:49,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 188 transitions, 675 flow [2021-10-15 20:25:49,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 188 transitions, 672 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 20:25:49,422 INFO L242 Difference]: Finished difference. Result has 131 places, 188 transitions, 653 flow [2021-10-15 20:25:49,422 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=636, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=653, PETRI_PLACES=131, PETRI_TRANSITIONS=188} [2021-10-15 20:25:49,423 INFO L334 CegarLoopForPetriNet]: 112 programPoint places, 19 predicate places. [2021-10-15 20:25:49,423 INFO L470 AbstractCegarLoop]: Abstraction has has 131 places, 188 transitions, 653 flow [2021-10-15 20:25:49,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 202.0) internal successors, (606), 3 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:49,424 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:25:49,424 INFO L254 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:25:49,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-15 20:25:49,425 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:25:49,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:25:49,425 INFO L82 PathProgramCache]: Analyzing trace with hash -1310907730, now seen corresponding path program 1 times [2021-10-15 20:25:49,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:25:49,426 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051872950] [2021-10-15 20:25:49,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:25:49,426 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:25:49,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:25:49,498 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 94 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-10-15 20:25:49,499 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:25:49,499 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051872950] [2021-10-15 20:25:49,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051872950] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:25:49,499 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:25:49,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 20:25:49,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525692584] [2021-10-15 20:25:49,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:25:49,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:25:49,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:25:49,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 20:25:49,509 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 216 [2021-10-15 20:25:49,511 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 188 transitions, 653 flow. Second operand has 3 states, 3 states have (on average 202.0) internal successors, (606), 3 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:49,511 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:25:49,511 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 216 [2021-10-15 20:25:49,511 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:25:49,629 INFO L129 PetriNetUnfolder]: 195/764 cut-off events. [2021-10-15 20:25:49,629 INFO L130 PetriNetUnfolder]: For 276/276 co-relation queries the response was YES. [2021-10-15 20:25:49,631 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1136 conditions, 764 events. 195/764 cut-off events. For 276/276 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 2542 event pairs, 0 based on Foata normal form. 1/653 useless extension candidates. Maximal degree in co-relation 1013. Up to 75 conditions per place. [2021-10-15 20:25:49,636 INFO L132 encePairwiseOnDemand]: 213/216 looper letters, 14 selfloop transitions, 3 changer transitions 0/189 dead transitions. [2021-10-15 20:25:49,636 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 189 transitions, 691 flow [2021-10-15 20:25:49,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:25:49,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:25:49,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 615 transitions. [2021-10-15 20:25:49,639 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9490740740740741 [2021-10-15 20:25:49,639 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 615 transitions. [2021-10-15 20:25:49,639 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 615 transitions. [2021-10-15 20:25:49,640 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:25:49,640 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 615 transitions. [2021-10-15 20:25:49,643 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 205.0) internal successors, (615), 3 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:49,645 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:49,646 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:49,646 INFO L186 Difference]: Start difference. First operand has 131 places, 188 transitions, 653 flow. Second operand 3 states and 615 transitions. [2021-10-15 20:25:49,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 189 transitions, 691 flow [2021-10-15 20:25:49,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 189 transitions, 688 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 20:25:49,657 INFO L242 Difference]: Finished difference. Result has 133 places, 189 transitions, 667 flow [2021-10-15 20:25:49,658 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=650, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=667, PETRI_PLACES=133, PETRI_TRANSITIONS=189} [2021-10-15 20:25:49,658 INFO L334 CegarLoopForPetriNet]: 112 programPoint places, 21 predicate places. [2021-10-15 20:25:49,659 INFO L470 AbstractCegarLoop]: Abstraction has has 133 places, 189 transitions, 667 flow [2021-10-15 20:25:49,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 202.0) internal successors, (606), 3 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:49,659 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:25:49,660 INFO L254 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:25:49,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-15 20:25:49,660 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:25:49,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:25:49,662 INFO L82 PathProgramCache]: Analyzing trace with hash -1176894224, now seen corresponding path program 1 times [2021-10-15 20:25:49,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:25:49,664 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066514552] [2021-10-15 20:25:49,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:25:49,664 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:25:49,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:25:49,740 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-10-15 20:25:49,740 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:25:49,740 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066514552] [2021-10-15 20:25:49,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066514552] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:25:49,741 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:25:49,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 20:25:49,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910337011] [2021-10-15 20:25:49,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:25:49,744 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:25:49,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:25:49,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 20:25:49,747 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 216 [2021-10-15 20:25:49,748 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 189 transitions, 667 flow. Second operand has 3 states, 3 states have (on average 202.0) internal successors, (606), 3 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:49,748 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:25:49,748 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 216 [2021-10-15 20:25:49,748 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:25:49,942 INFO L129 PetriNetUnfolder]: 286/1097 cut-off events. [2021-10-15 20:25:49,943 INFO L130 PetriNetUnfolder]: For 449/449 co-relation queries the response was YES. [2021-10-15 20:25:49,946 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1661 conditions, 1097 events. 286/1097 cut-off events. For 449/449 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 3887 event pairs, 0 based on Foata normal form. 1/944 useless extension candidates. Maximal degree in co-relation 1427. Up to 105 conditions per place. [2021-10-15 20:25:49,952 INFO L132 encePairwiseOnDemand]: 209/216 looper letters, 22 selfloop transitions, 6 changer transitions 0/200 dead transitions. [2021-10-15 20:25:49,952 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 200 transitions, 774 flow [2021-10-15 20:25:49,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:25:49,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:25:49,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 625 transitions. [2021-10-15 20:25:49,956 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9645061728395061 [2021-10-15 20:25:49,956 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 625 transitions. [2021-10-15 20:25:49,957 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 625 transitions. [2021-10-15 20:25:49,958 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:25:49,958 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 625 transitions. [2021-10-15 20:25:49,963 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 208.33333333333334) internal successors, (625), 3 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:49,965 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:49,966 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:49,966 INFO L186 Difference]: Start difference. First operand has 133 places, 189 transitions, 667 flow. Second operand 3 states and 625 transitions. [2021-10-15 20:25:49,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 200 transitions, 774 flow [2021-10-15 20:25:49,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 200 transitions, 768 flow, removed 1 selfloop flow, removed 1 redundant places. [2021-10-15 20:25:49,978 INFO L242 Difference]: Finished difference. Result has 136 places, 194 transitions, 728 flow [2021-10-15 20:25:49,979 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=662, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=728, PETRI_PLACES=136, PETRI_TRANSITIONS=194} [2021-10-15 20:25:49,979 INFO L334 CegarLoopForPetriNet]: 112 programPoint places, 24 predicate places. [2021-10-15 20:25:49,979 INFO L470 AbstractCegarLoop]: Abstraction has has 136 places, 194 transitions, 728 flow [2021-10-15 20:25:49,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 202.0) internal successors, (606), 3 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:49,980 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:25:49,980 INFO L254 CegarLoopForPetriNet]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 7, 7, 5, 5, 3, 3, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:25:49,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-15 20:25:49,981 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:25:49,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:25:49,981 INFO L82 PathProgramCache]: Analyzing trace with hash -1507221521, now seen corresponding path program 1 times [2021-10-15 20:25:49,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:25:49,982 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814002529] [2021-10-15 20:25:49,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:25:49,982 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:25:50,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:25:50,068 INFO L134 CoverageAnalysis]: Checked inductivity of 384 backedges. 260 proven. 0 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2021-10-15 20:25:50,068 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:25:50,068 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814002529] [2021-10-15 20:25:50,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814002529] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:25:50,068 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:25:50,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 20:25:50,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438095329] [2021-10-15 20:25:50,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:25:50,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:25:50,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:25:50,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 20:25:50,072 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 216 [2021-10-15 20:25:50,073 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 194 transitions, 728 flow. Second operand has 3 states, 3 states have (on average 140.66666666666666) internal successors, (422), 3 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:50,073 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:25:50,073 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 216 [2021-10-15 20:25:50,073 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:25:50,551 INFO L129 PetriNetUnfolder]: 361/1298 cut-off events. [2021-10-15 20:25:50,551 INFO L130 PetriNetUnfolder]: For 774/774 co-relation queries the response was YES. [2021-10-15 20:25:50,555 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2699 conditions, 1298 events. 361/1298 cut-off events. For 774/774 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 4085 event pairs, 0 based on Foata normal form. 33/1165 useless extension candidates. Maximal degree in co-relation 1815. Up to 387 conditions per place. [2021-10-15 20:25:50,563 INFO L132 encePairwiseOnDemand]: 177/216 looper letters, 127 selfloop transitions, 30 changer transitions 1/249 dead transitions. [2021-10-15 20:25:50,563 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 249 transitions, 1232 flow [2021-10-15 20:25:50,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:25:50,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:25:50,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 523 transitions. [2021-10-15 20:25:50,566 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8070987654320988 [2021-10-15 20:25:50,566 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 523 transitions. [2021-10-15 20:25:50,567 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 523 transitions. [2021-10-15 20:25:50,567 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:25:50,567 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 523 transitions. [2021-10-15 20:25:50,569 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 174.33333333333334) internal successors, (523), 3 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:50,572 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:50,572 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:50,573 INFO L186 Difference]: Start difference. First operand has 136 places, 194 transitions, 728 flow. Second operand 3 states and 523 transitions. [2021-10-15 20:25:50,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 249 transitions, 1232 flow [2021-10-15 20:25:50,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 249 transitions, 1220 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 20:25:50,588 INFO L242 Difference]: Finished difference. Result has 138 places, 215 transitions, 1010 flow [2021-10-15 20:25:50,588 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=716, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1010, PETRI_PLACES=138, PETRI_TRANSITIONS=215} [2021-10-15 20:25:50,588 INFO L334 CegarLoopForPetriNet]: 112 programPoint places, 26 predicate places. [2021-10-15 20:25:50,589 INFO L470 AbstractCegarLoop]: Abstraction has has 138 places, 215 transitions, 1010 flow [2021-10-15 20:25:50,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 140.66666666666666) internal successors, (422), 3 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:50,589 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:25:50,590 INFO L254 CegarLoopForPetriNet]: trace histogram [11, 11, 10, 10, 9, 9, 9, 9, 9, 7, 7, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-10-15 20:25:50,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-10-15 20:25:50,590 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:25:50,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:25:50,591 INFO L82 PathProgramCache]: Analyzing trace with hash 2044390637, now seen corresponding path program 1 times [2021-10-15 20:25:50,591 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:25:50,591 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659467130] [2021-10-15 20:25:50,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:25:50,591 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:25:50,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:25:50,680 INFO L134 CoverageAnalysis]: Checked inductivity of 527 backedges. 327 proven. 0 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2021-10-15 20:25:50,680 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:25:50,681 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659467130] [2021-10-15 20:25:50,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659467130] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:25:50,681 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:25:50,681 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 20:25:50,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793592614] [2021-10-15 20:25:50,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:25:50,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:25:50,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:25:50,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 20:25:50,690 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 216 [2021-10-15 20:25:50,691 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 215 transitions, 1010 flow. Second operand has 3 states, 3 states have (on average 140.0) internal successors, (420), 3 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:50,691 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:25:50,692 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 216 [2021-10-15 20:25:50,692 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:25:51,290 INFO L129 PetriNetUnfolder]: 424/1618 cut-off events. [2021-10-15 20:25:51,291 INFO L130 PetriNetUnfolder]: For 2034/2034 co-relation queries the response was YES. [2021-10-15 20:25:51,296 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3714 conditions, 1618 events. 424/1618 cut-off events. For 2034/2034 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 5326 event pairs, 0 based on Foata normal form. 120/1545 useless extension candidates. Maximal degree in co-relation 2457. Up to 509 conditions per place. [2021-10-15 20:25:51,307 INFO L132 encePairwiseOnDemand]: 177/216 looper letters, 151 selfloop transitions, 21 changer transitions 0/263 dead transitions. [2021-10-15 20:25:51,308 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 263 transitions, 1562 flow [2021-10-15 20:25:51,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:25:51,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:25:51,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 524 transitions. [2021-10-15 20:25:51,311 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.808641975308642 [2021-10-15 20:25:51,311 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 524 transitions. [2021-10-15 20:25:51,312 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 524 transitions. [2021-10-15 20:25:51,312 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:25:51,313 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 524 transitions. [2021-10-15 20:25:51,315 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 174.66666666666666) internal successors, (524), 3 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:51,317 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:51,318 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:51,319 INFO L186 Difference]: Start difference. First operand has 138 places, 215 transitions, 1010 flow. Second operand 3 states and 524 transitions. [2021-10-15 20:25:51,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 263 transitions, 1562 flow [2021-10-15 20:25:51,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 263 transitions, 1500 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 20:25:51,338 INFO L242 Difference]: Finished difference. Result has 140 places, 229 transitions, 1270 flow [2021-10-15 20:25:51,338 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=950, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1270, PETRI_PLACES=140, PETRI_TRANSITIONS=229} [2021-10-15 20:25:51,339 INFO L334 CegarLoopForPetriNet]: 112 programPoint places, 28 predicate places. [2021-10-15 20:25:51,339 INFO L470 AbstractCegarLoop]: Abstraction has has 140 places, 229 transitions, 1270 flow [2021-10-15 20:25:51,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 140.0) internal successors, (420), 3 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:51,340 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:25:51,340 INFO L254 CegarLoopForPetriNet]: trace histogram [12, 12, 11, 11, 10, 10, 10, 10, 10, 8, 8, 6, 6, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-10-15 20:25:51,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-10-15 20:25:51,341 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:25:51,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:25:51,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1146744255, now seen corresponding path program 1 times [2021-10-15 20:25:51,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:25:51,342 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065022139] [2021-10-15 20:25:51,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:25:51,342 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:25:51,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:25:51,410 INFO L134 CoverageAnalysis]: Checked inductivity of 659 backedges. 404 proven. 0 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2021-10-15 20:25:51,410 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:25:51,410 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065022139] [2021-10-15 20:25:51,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065022139] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:25:51,411 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:25:51,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 20:25:51,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479287303] [2021-10-15 20:25:51,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:25:51,412 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:25:51,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:25:51,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 20:25:51,414 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 216 [2021-10-15 20:25:51,415 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 229 transitions, 1270 flow. Second operand has 3 states, 3 states have (on average 141.33333333333334) internal successors, (424), 3 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:51,416 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:25:51,416 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 216 [2021-10-15 20:25:51,416 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:25:52,102 INFO L129 PetriNetUnfolder]: 448/1774 cut-off events. [2021-10-15 20:25:52,102 INFO L130 PetriNetUnfolder]: For 2554/2554 co-relation queries the response was YES. [2021-10-15 20:25:52,107 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4231 conditions, 1774 events. 448/1774 cut-off events. For 2554/2554 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 5838 event pairs, 0 based on Foata normal form. 54/1617 useless extension candidates. Maximal degree in co-relation 2802. Up to 638 conditions per place. [2021-10-15 20:25:52,117 INFO L132 encePairwiseOnDemand]: 176/216 looper letters, 151 selfloop transitions, 26 changer transitions 0/268 dead transitions. [2021-10-15 20:25:52,117 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 268 transitions, 1732 flow [2021-10-15 20:25:52,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:25:52,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:25:52,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 525 transitions. [2021-10-15 20:25:52,120 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8101851851851852 [2021-10-15 20:25:52,120 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 525 transitions. [2021-10-15 20:25:52,120 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 525 transitions. [2021-10-15 20:25:52,121 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:25:52,121 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 525 transitions. [2021-10-15 20:25:52,123 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 175.0) internal successors, (525), 3 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:52,125 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:52,126 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:52,126 INFO L186 Difference]: Start difference. First operand has 140 places, 229 transitions, 1270 flow. Second operand 3 states and 525 transitions. [2021-10-15 20:25:52,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 268 transitions, 1732 flow [2021-10-15 20:25:52,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 268 transitions, 1688 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 20:25:52,146 INFO L242 Difference]: Finished difference. Result has 142 places, 234 transitions, 1406 flow [2021-10-15 20:25:52,147 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=1228, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1406, PETRI_PLACES=142, PETRI_TRANSITIONS=234} [2021-10-15 20:25:52,147 INFO L334 CegarLoopForPetriNet]: 112 programPoint places, 30 predicate places. [2021-10-15 20:25:52,147 INFO L470 AbstractCegarLoop]: Abstraction has has 142 places, 234 transitions, 1406 flow [2021-10-15 20:25:52,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 141.33333333333334) internal successors, (424), 3 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:52,148 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:25:52,148 INFO L254 CegarLoopForPetriNet]: trace histogram [13, 13, 12, 12, 11, 11, 11, 11, 11, 9, 9, 7, 7, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1] [2021-10-15 20:25:52,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-10-15 20:25:52,149 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:25:52,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:25:52,149 INFO L82 PathProgramCache]: Analyzing trace with hash -440788500, now seen corresponding path program 1 times [2021-10-15 20:25:52,150 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:25:52,150 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150186661] [2021-10-15 20:25:52,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:25:52,150 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:25:52,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:25:52,223 INFO L134 CoverageAnalysis]: Checked inductivity of 807 backedges. 479 proven. 0 refuted. 0 times theorem prover too weak. 328 trivial. 0 not checked. [2021-10-15 20:25:52,224 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:25:52,224 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150186661] [2021-10-15 20:25:52,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150186661] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:25:52,224 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:25:52,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 20:25:52,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152681822] [2021-10-15 20:25:52,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:25:52,225 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:25:52,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:25:52,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 20:25:52,228 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 216 [2021-10-15 20:25:52,228 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 234 transitions, 1406 flow. Second operand has 3 states, 3 states have (on average 142.66666666666666) internal successors, (428), 3 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:52,229 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:25:52,229 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 216 [2021-10-15 20:25:52,229 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:25:52,837 INFO L129 PetriNetUnfolder]: 475/1933 cut-off events. [2021-10-15 20:25:52,837 INFO L130 PetriNetUnfolder]: For 3482/3482 co-relation queries the response was YES. [2021-10-15 20:25:52,843 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4755 conditions, 1933 events. 475/1933 cut-off events. For 3482/3482 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 6738 event pairs, 0 based on Foata normal form. 48/1755 useless extension candidates. Maximal degree in co-relation 3151. Up to 773 conditions per place. [2021-10-15 20:25:52,855 INFO L132 encePairwiseOnDemand]: 176/216 looper letters, 152 selfloop transitions, 31 changer transitions 0/274 dead transitions. [2021-10-15 20:25:52,856 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 274 transitions, 1908 flow [2021-10-15 20:25:52,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:25:52,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:25:52,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 524 transitions. [2021-10-15 20:25:52,859 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.808641975308642 [2021-10-15 20:25:52,859 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 524 transitions. [2021-10-15 20:25:52,859 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 524 transitions. [2021-10-15 20:25:52,859 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:25:52,860 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 524 transitions. [2021-10-15 20:25:52,862 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 174.66666666666666) internal successors, (524), 3 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:52,864 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:52,865 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:52,865 INFO L186 Difference]: Start difference. First operand has 142 places, 234 transitions, 1406 flow. Second operand 3 states and 524 transitions. [2021-10-15 20:25:52,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 274 transitions, 1908 flow [2021-10-15 20:25:52,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 274 transitions, 1850 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 20:25:52,889 INFO L242 Difference]: Finished difference. Result has 144 places, 240 transitions, 1574 flow [2021-10-15 20:25:52,889 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=1354, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1574, PETRI_PLACES=144, PETRI_TRANSITIONS=240} [2021-10-15 20:25:52,890 INFO L334 CegarLoopForPetriNet]: 112 programPoint places, 32 predicate places. [2021-10-15 20:25:52,890 INFO L470 AbstractCegarLoop]: Abstraction has has 144 places, 240 transitions, 1574 flow [2021-10-15 20:25:52,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 142.66666666666666) internal successors, (428), 3 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:52,890 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:25:52,891 INFO L254 CegarLoopForPetriNet]: trace histogram [13, 13, 12, 12, 11, 11, 11, 11, 11, 9, 9, 7, 7, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1] [2021-10-15 20:25:52,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-10-15 20:25:52,891 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:25:52,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:25:52,892 INFO L82 PathProgramCache]: Analyzing trace with hash -322347026, now seen corresponding path program 1 times [2021-10-15 20:25:52,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:25:52,892 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939326251] [2021-10-15 20:25:52,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:25:52,892 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:25:52,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:25:52,972 INFO L134 CoverageAnalysis]: Checked inductivity of 807 backedges. 479 proven. 0 refuted. 0 times theorem prover too weak. 328 trivial. 0 not checked. [2021-10-15 20:25:52,972 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:25:52,972 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939326251] [2021-10-15 20:25:52,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939326251] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:25:52,975 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:25:52,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 20:25:52,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88831217] [2021-10-15 20:25:52,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:25:52,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:25:52,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:25:52,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 20:25:52,979 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 216 [2021-10-15 20:25:52,980 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 240 transitions, 1574 flow. Second operand has 3 states, 3 states have (on average 142.66666666666666) internal successors, (428), 3 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:52,981 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:25:52,981 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 216 [2021-10-15 20:25:52,981 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:25:53,650 INFO L129 PetriNetUnfolder]: 517/2107 cut-off events. [2021-10-15 20:25:53,650 INFO L130 PetriNetUnfolder]: For 4779/4779 co-relation queries the response was YES. [2021-10-15 20:25:53,657 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5396 conditions, 2107 events. 517/2107 cut-off events. For 4779/4779 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 7323 event pairs, 0 based on Foata normal form. 36/1905 useless extension candidates. Maximal degree in co-relation 3578. Up to 938 conditions per place. [2021-10-15 20:25:53,669 INFO L132 encePairwiseOnDemand]: 176/216 looper letters, 156 selfloop transitions, 38 changer transitions 0/285 dead transitions. [2021-10-15 20:25:53,669 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 285 transitions, 2162 flow [2021-10-15 20:25:53,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:25:53,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:25:53,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 525 transitions. [2021-10-15 20:25:53,673 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8101851851851852 [2021-10-15 20:25:53,673 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 525 transitions. [2021-10-15 20:25:53,673 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 525 transitions. [2021-10-15 20:25:53,674 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:25:53,674 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 525 transitions. [2021-10-15 20:25:53,675 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 175.0) internal successors, (525), 3 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:53,677 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:53,678 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:53,679 INFO L186 Difference]: Start difference. First operand has 144 places, 240 transitions, 1574 flow. Second operand 3 states and 525 transitions. [2021-10-15 20:25:53,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 285 transitions, 2162 flow [2021-10-15 20:25:53,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 285 transitions, 2042 flow, removed 24 selfloop flow, removed 2 redundant places. [2021-10-15 20:25:53,707 INFO L242 Difference]: Finished difference. Result has 146 places, 251 transitions, 1774 flow [2021-10-15 20:25:53,708 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=1476, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1774, PETRI_PLACES=146, PETRI_TRANSITIONS=251} [2021-10-15 20:25:53,708 INFO L334 CegarLoopForPetriNet]: 112 programPoint places, 34 predicate places. [2021-10-15 20:25:53,708 INFO L470 AbstractCegarLoop]: Abstraction has has 146 places, 251 transitions, 1774 flow [2021-10-15 20:25:53,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 142.66666666666666) internal successors, (428), 3 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:53,709 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:25:53,709 INFO L254 CegarLoopForPetriNet]: trace histogram [14, 14, 13, 13, 12, 12, 12, 12, 12, 10, 10, 8, 8, 6, 6, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:25:53,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-10-15 20:25:53,710 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:25:53,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:25:53,710 INFO L82 PathProgramCache]: Analyzing trace with hash -1076406516, now seen corresponding path program 1 times [2021-10-15 20:25:53,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:25:53,711 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125587356] [2021-10-15 20:25:53,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:25:53,711 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:25:53,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:25:53,796 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 622 proven. 0 refuted. 0 times theorem prover too weak. 353 trivial. 0 not checked. [2021-10-15 20:25:53,796 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:25:53,796 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125587356] [2021-10-15 20:25:53,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125587356] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:25:53,799 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:25:53,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 20:25:53,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151657647] [2021-10-15 20:25:53,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:25:53,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:25:53,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:25:53,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 20:25:53,803 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 208 out of 216 [2021-10-15 20:25:53,804 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 251 transitions, 1774 flow. Second operand has 3 states, 3 states have (on average 209.0) internal successors, (627), 3 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:53,804 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:25:53,804 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 208 of 216 [2021-10-15 20:25:53,804 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:25:54,661 INFO L129 PetriNetUnfolder]: 1016/4157 cut-off events. [2021-10-15 20:25:54,661 INFO L130 PetriNetUnfolder]: For 9160/9160 co-relation queries the response was YES. [2021-10-15 20:25:54,677 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8240 conditions, 4157 events. 1016/4157 cut-off events. For 9160/9160 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 20407 event pairs, 0 based on Foata normal form. 0/3692 useless extension candidates. Maximal degree in co-relation 5391. Up to 471 conditions per place. [2021-10-15 20:25:54,699 INFO L132 encePairwiseOnDemand]: 214/216 looper letters, 13 selfloop transitions, 2 changer transitions 0/257 dead transitions. [2021-10-15 20:25:54,699 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 257 transitions, 1834 flow [2021-10-15 20:25:54,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:25:54,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:25:54,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 633 transitions. [2021-10-15 20:25:54,702 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9768518518518519 [2021-10-15 20:25:54,703 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 633 transitions. [2021-10-15 20:25:54,703 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 633 transitions. [2021-10-15 20:25:54,704 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:25:54,704 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 633 transitions. [2021-10-15 20:25:54,706 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 211.0) internal successors, (633), 3 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:54,708 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:54,709 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:54,709 INFO L186 Difference]: Start difference. First operand has 146 places, 251 transitions, 1774 flow. Second operand 3 states and 633 transitions. [2021-10-15 20:25:54,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 257 transitions, 1834 flow [2021-10-15 20:25:54,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 257 transitions, 1724 flow, removed 16 selfloop flow, removed 2 redundant places. [2021-10-15 20:25:54,744 INFO L242 Difference]: Finished difference. Result has 148 places, 253 transitions, 1694 flow [2021-10-15 20:25:54,745 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=1666, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1694, PETRI_PLACES=148, PETRI_TRANSITIONS=253} [2021-10-15 20:25:54,745 INFO L334 CegarLoopForPetriNet]: 112 programPoint places, 36 predicate places. [2021-10-15 20:25:54,745 INFO L470 AbstractCegarLoop]: Abstraction has has 148 places, 253 transitions, 1694 flow [2021-10-15 20:25:54,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 209.0) internal successors, (627), 3 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:54,746 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:25:54,747 INFO L254 CegarLoopForPetriNet]: trace histogram [14, 14, 13, 13, 12, 12, 12, 12, 12, 10, 10, 8, 8, 6, 6, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:25:54,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-10-15 20:25:54,747 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:25:54,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:25:54,748 INFO L82 PathProgramCache]: Analyzing trace with hash -957965042, now seen corresponding path program 1 times [2021-10-15 20:25:54,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:25:54,748 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773584229] [2021-10-15 20:25:54,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:25:54,749 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:25:54,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:25:54,815 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 554 proven. 0 refuted. 0 times theorem prover too weak. 421 trivial. 0 not checked. [2021-10-15 20:25:54,816 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:25:54,816 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773584229] [2021-10-15 20:25:54,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773584229] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:25:54,816 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:25:54,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 20:25:54,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485236921] [2021-10-15 20:25:54,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:25:54,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:25:54,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:25:54,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 20:25:54,820 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 216 [2021-10-15 20:25:54,821 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 253 transitions, 1694 flow. Second operand has 3 states, 3 states have (on average 145.33333333333334) internal successors, (436), 3 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:54,821 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:25:54,821 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 216 [2021-10-15 20:25:54,821 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:25:56,268 INFO L129 PetriNetUnfolder]: 1118/4517 cut-off events. [2021-10-15 20:25:56,268 INFO L130 PetriNetUnfolder]: For 9217/9217 co-relation queries the response was YES. [2021-10-15 20:25:56,283 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11646 conditions, 4517 events. 1118/4517 cut-off events. For 9217/9217 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 21630 event pairs, 0 based on Foata normal form. 48/4082 useless extension candidates. Maximal degree in co-relation 7671. Up to 2225 conditions per place. [2021-10-15 20:25:56,314 INFO L132 encePairwiseOnDemand]: 176/216 looper letters, 164 selfloop transitions, 46 changer transitions 0/301 dead transitions. [2021-10-15 20:25:56,315 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 301 transitions, 2340 flow [2021-10-15 20:25:56,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:25:56,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:25:56,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 524 transitions. [2021-10-15 20:25:56,318 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.808641975308642 [2021-10-15 20:25:56,319 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 524 transitions. [2021-10-15 20:25:56,319 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 524 transitions. [2021-10-15 20:25:56,320 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:25:56,320 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 524 transitions. [2021-10-15 20:25:56,322 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 174.66666666666666) internal successors, (524), 3 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:56,325 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:56,326 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:56,326 INFO L186 Difference]: Start difference. First operand has 148 places, 253 transitions, 1694 flow. Second operand 3 states and 524 transitions. [2021-10-15 20:25:56,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 301 transitions, 2340 flow [2021-10-15 20:25:56,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 301 transitions, 2338 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 20:25:56,354 INFO L242 Difference]: Finished difference. Result has 151 places, 267 transitions, 2068 flow [2021-10-15 20:25:56,355 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=1692, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2068, PETRI_PLACES=151, PETRI_TRANSITIONS=267} [2021-10-15 20:25:56,355 INFO L334 CegarLoopForPetriNet]: 112 programPoint places, 39 predicate places. [2021-10-15 20:25:56,355 INFO L470 AbstractCegarLoop]: Abstraction has has 151 places, 267 transitions, 2068 flow [2021-10-15 20:25:56,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 145.33333333333334) internal successors, (436), 3 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:56,356 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:25:56,356 INFO L254 CegarLoopForPetriNet]: trace histogram [15, 15, 14, 14, 13, 13, 13, 13, 13, 11, 11, 9, 9, 7, 7, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:25:56,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-10-15 20:25:56,357 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:25:56,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:25:56,358 INFO L82 PathProgramCache]: Analyzing trace with hash -219027261, now seen corresponding path program 1 times [2021-10-15 20:25:56,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:25:56,359 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172911727] [2021-10-15 20:25:56,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:25:56,359 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:25:56,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:25:56,451 INFO L134 CoverageAnalysis]: Checked inductivity of 1169 backedges. 629 proven. 0 refuted. 0 times theorem prover too weak. 540 trivial. 0 not checked. [2021-10-15 20:25:56,452 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:25:56,452 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172911727] [2021-10-15 20:25:56,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172911727] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:25:56,452 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:25:56,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 20:25:56,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451695450] [2021-10-15 20:25:56,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:25:56,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:25:56,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:25:56,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 20:25:56,458 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 216 [2021-10-15 20:25:56,459 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 267 transitions, 2068 flow. Second operand has 3 states, 3 states have (on average 147.33333333333334) internal successors, (442), 3 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:56,459 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:25:56,459 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 216 [2021-10-15 20:25:56,459 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:25:58,192 INFO L129 PetriNetUnfolder]: 1082/4493 cut-off events. [2021-10-15 20:25:58,193 INFO L130 PetriNetUnfolder]: For 12653/12653 co-relation queries the response was YES. [2021-10-15 20:25:58,209 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12063 conditions, 4493 events. 1082/4493 cut-off events. For 12653/12653 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 21610 event pairs, 0 based on Foata normal form. 36/4046 useless extension candidates. Maximal degree in co-relation 11539. Up to 2471 conditions per place. [2021-10-15 20:25:58,228 INFO L132 encePairwiseOnDemand]: 177/216 looper letters, 171 selfloop transitions, 34 changer transitions 0/296 dead transitions. [2021-10-15 20:25:58,228 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 296 transitions, 2474 flow [2021-10-15 20:25:58,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:25:58,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:25:58,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 524 transitions. [2021-10-15 20:25:58,232 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.808641975308642 [2021-10-15 20:25:58,232 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 524 transitions. [2021-10-15 20:25:58,232 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 524 transitions. [2021-10-15 20:25:58,233 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:25:58,233 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 524 transitions. [2021-10-15 20:25:58,236 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 174.66666666666666) internal successors, (524), 3 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:58,238 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:58,239 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:58,239 INFO L186 Difference]: Start difference. First operand has 151 places, 267 transitions, 2068 flow. Second operand 3 states and 524 transitions. [2021-10-15 20:25:58,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 296 transitions, 2474 flow [2021-10-15 20:25:58,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 296 transitions, 2368 flow, removed 6 selfloop flow, removed 2 redundant places. [2021-10-15 20:25:58,273 INFO L242 Difference]: Finished difference. Result has 152 places, 262 transitions, 1984 flow [2021-10-15 20:25:58,273 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=1866, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1984, PETRI_PLACES=152, PETRI_TRANSITIONS=262} [2021-10-15 20:25:58,275 INFO L334 CegarLoopForPetriNet]: 112 programPoint places, 40 predicate places. [2021-10-15 20:25:58,275 INFO L470 AbstractCegarLoop]: Abstraction has has 152 places, 262 transitions, 1984 flow [2021-10-15 20:25:58,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 147.33333333333334) internal successors, (442), 3 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:58,276 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:25:58,277 INFO L254 CegarLoopForPetriNet]: trace histogram [14, 14, 13, 13, 13, 13, 13, 13, 13, 12, 12, 10, 10, 8, 8, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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] [2021-10-15 20:25:58,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-10-15 20:25:58,277 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:25:58,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:25:58,278 INFO L82 PathProgramCache]: Analyzing trace with hash -2044654488, now seen corresponding path program 1 times [2021-10-15 20:25:58,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:25:58,278 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427290561] [2021-10-15 20:25:58,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:25:58,279 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:25:58,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:25:58,376 INFO L134 CoverageAnalysis]: Checked inductivity of 1175 backedges. 562 proven. 0 refuted. 0 times theorem prover too weak. 613 trivial. 0 not checked. [2021-10-15 20:25:58,376 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:25:58,376 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427290561] [2021-10-15 20:25:58,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427290561] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:25:58,377 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:25:58,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 20:25:58,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490428365] [2021-10-15 20:25:58,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:25:58,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:25:58,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:25:58,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 20:25:58,381 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 216 [2021-10-15 20:25:58,382 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 262 transitions, 1984 flow. Second operand has 3 states, 3 states have (on average 149.33333333333334) internal successors, (448), 3 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:58,382 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:25:58,382 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 216 [2021-10-15 20:25:58,382 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:25:59,740 INFO L129 PetriNetUnfolder]: 1028/4439 cut-off events. [2021-10-15 20:25:59,741 INFO L130 PetriNetUnfolder]: For 11342/11342 co-relation queries the response was YES. [2021-10-15 20:25:59,757 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11776 conditions, 4439 events. 1028/4439 cut-off events. For 11342/11342 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 20629 event pairs, 0 based on Foata normal form. 54/4010 useless extension candidates. Maximal degree in co-relation 7758. Up to 2642 conditions per place. [2021-10-15 20:25:59,773 INFO L132 encePairwiseOnDemand]: 199/216 looper letters, 187 selfloop transitions, 9 changer transitions 0/287 dead transitions. [2021-10-15 20:25:59,773 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 287 transitions, 2350 flow [2021-10-15 20:25:59,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:25:59,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:25:59,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 503 transitions. [2021-10-15 20:25:59,777 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7762345679012346 [2021-10-15 20:25:59,777 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 503 transitions. [2021-10-15 20:25:59,777 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 503 transitions. [2021-10-15 20:25:59,778 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:25:59,778 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 503 transitions. [2021-10-15 20:25:59,781 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 167.66666666666666) internal successors, (503), 3 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:59,783 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:59,784 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:59,784 INFO L186 Difference]: Start difference. First operand has 152 places, 262 transitions, 1984 flow. Second operand 3 states and 503 transitions. [2021-10-15 20:25:59,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 287 transitions, 2350 flow [2021-10-15 20:25:59,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 287 transitions, 2316 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 20:25:59,820 INFO L242 Difference]: Finished difference. Result has 153 places, 253 transitions, 1864 flow [2021-10-15 20:25:59,820 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=1846, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1864, PETRI_PLACES=153, PETRI_TRANSITIONS=253} [2021-10-15 20:25:59,821 INFO L334 CegarLoopForPetriNet]: 112 programPoint places, 41 predicate places. [2021-10-15 20:25:59,821 INFO L470 AbstractCegarLoop]: Abstraction has has 153 places, 253 transitions, 1864 flow [2021-10-15 20:25:59,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 149.33333333333334) internal successors, (448), 3 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:59,822 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:25:59,822 INFO L254 CegarLoopForPetriNet]: trace histogram [16, 16, 15, 15, 15, 15, 14, 14, 14, 12, 12, 10, 10, 8, 8, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:25:59,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-10-15 20:25:59,823 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:25:59,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:25:59,824 INFO L82 PathProgramCache]: Analyzing trace with hash 1717836225, now seen corresponding path program 1 times [2021-10-15 20:25:59,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:25:59,824 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034443556] [2021-10-15 20:25:59,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:25:59,825 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:25:59,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:25:59,936 INFO L134 CoverageAnalysis]: Checked inductivity of 1420 backedges. 731 proven. 0 refuted. 0 times theorem prover too weak. 689 trivial. 0 not checked. [2021-10-15 20:25:59,936 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:25:59,936 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034443556] [2021-10-15 20:25:59,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034443556] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:25:59,937 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:25:59,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 20:25:59,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979747340] [2021-10-15 20:25:59,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:25:59,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:25:59,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:25:59,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 20:25:59,940 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 216 [2021-10-15 20:25:59,942 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 253 transitions, 1864 flow. Second operand has 3 states, 3 states have (on average 149.0) internal successors, (447), 3 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:59,942 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:25:59,942 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 216 [2021-10-15 20:25:59,942 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:26:01,404 INFO L129 PetriNetUnfolder]: 1058/4721 cut-off events. [2021-10-15 20:26:01,404 INFO L130 PetriNetUnfolder]: For 11365/11365 co-relation queries the response was YES. [2021-10-15 20:26:01,416 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12186 conditions, 4721 events. 1058/4721 cut-off events. For 11365/11365 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 22300 event pairs, 0 based on Foata normal form. 12/4220 useless extension candidates. Maximal degree in co-relation 8031. Up to 2665 conditions per place. [2021-10-15 20:26:01,434 INFO L132 encePairwiseOnDemand]: 178/216 looper letters, 160 selfloop transitions, 37 changer transitions 0/288 dead transitions. [2021-10-15 20:26:01,434 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 288 transitions, 2344 flow [2021-10-15 20:26:01,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:26:01,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:26:01,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 518 transitions. [2021-10-15 20:26:01,438 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7993827160493827 [2021-10-15 20:26:01,438 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 518 transitions. [2021-10-15 20:26:01,438 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 518 transitions. [2021-10-15 20:26:01,439 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:26:01,439 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 518 transitions. [2021-10-15 20:26:01,441 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 172.66666666666666) internal successors, (518), 3 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:01,444 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:01,445 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:01,445 INFO L186 Difference]: Start difference. First operand has 153 places, 253 transitions, 1864 flow. Second operand 3 states and 518 transitions. [2021-10-15 20:26:01,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 288 transitions, 2344 flow [2021-10-15 20:26:01,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 288 transitions, 2335 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 20:26:01,477 INFO L242 Difference]: Finished difference. Result has 156 places, 254 transitions, 2017 flow [2021-10-15 20:26:01,478 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=1855, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2017, PETRI_PLACES=156, PETRI_TRANSITIONS=254} [2021-10-15 20:26:01,478 INFO L334 CegarLoopForPetriNet]: 112 programPoint places, 44 predicate places. [2021-10-15 20:26:01,478 INFO L470 AbstractCegarLoop]: Abstraction has has 156 places, 254 transitions, 2017 flow [2021-10-15 20:26:01,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 149.0) internal successors, (447), 3 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:01,479 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:26:01,479 INFO L254 CegarLoopForPetriNet]: trace histogram [16, 16, 15, 15, 15, 15, 14, 14, 14, 12, 12, 10, 10, 8, 8, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:26:01,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-10-15 20:26:01,480 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:26:01,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:26:01,481 INFO L82 PathProgramCache]: Analyzing trace with hash -1940636837, now seen corresponding path program 1 times [2021-10-15 20:26:01,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:26:01,481 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738788621] [2021-10-15 20:26:01,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:26:01,482 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:26:01,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:26:01,623 INFO L134 CoverageAnalysis]: Checked inductivity of 1420 backedges. 871 proven. 0 refuted. 0 times theorem prover too weak. 549 trivial. 0 not checked. [2021-10-15 20:26:01,624 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:26:01,625 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738788621] [2021-10-15 20:26:01,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738788621] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:26:01,625 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:26:01,625 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 20:26:01,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724896565] [2021-10-15 20:26:01,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:26:01,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:26:01,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:26:01,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 20:26:01,629 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 216 [2021-10-15 20:26:01,630 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 254 transitions, 2017 flow. Second operand has 3 states, 3 states have (on average 205.33333333333334) internal successors, (616), 3 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:01,631 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:26:01,631 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 216 [2021-10-15 20:26:01,631 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:26:03,587 INFO L129 PetriNetUnfolder]: 1990/8884 cut-off events. [2021-10-15 20:26:03,588 INFO L130 PetriNetUnfolder]: For 26752/26752 co-relation queries the response was YES. [2021-10-15 20:26:03,621 INFO L84 FinitePrefix]: Finished finitePrefix Result has 18216 conditions, 8884 events. 1990/8884 cut-off events. For 26752/26752 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 46520 event pairs, 0 based on Foata normal form. 18/7953 useless extension candidates. Maximal degree in co-relation 12991. Up to 981 conditions per place. [2021-10-15 20:26:03,649 INFO L132 encePairwiseOnDemand]: 210/216 looper letters, 9 selfloop transitions, 4 changer transitions 0/258 dead transitions. [2021-10-15 20:26:03,650 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 258 transitions, 2080 flow [2021-10-15 20:26:03,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:26:03,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:26:03,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 625 transitions. [2021-10-15 20:26:03,653 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9645061728395061 [2021-10-15 20:26:03,653 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 625 transitions. [2021-10-15 20:26:03,654 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 625 transitions. [2021-10-15 20:26:03,654 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:26:03,655 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 625 transitions. [2021-10-15 20:26:03,657 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 208.33333333333334) internal successors, (625), 3 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:03,659 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:03,660 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:03,660 INFO L186 Difference]: Start difference. First operand has 156 places, 254 transitions, 2017 flow. Second operand 3 states and 625 transitions. [2021-10-15 20:26:03,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 258 transitions, 2080 flow [2021-10-15 20:26:03,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 258 transitions, 2004 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 20:26:03,703 INFO L242 Difference]: Finished difference. Result has 158 places, 258 transitions, 2010 flow [2021-10-15 20:26:03,704 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=1943, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2010, PETRI_PLACES=158, PETRI_TRANSITIONS=258} [2021-10-15 20:26:03,704 INFO L334 CegarLoopForPetriNet]: 112 programPoint places, 46 predicate places. [2021-10-15 20:26:03,705 INFO L470 AbstractCegarLoop]: Abstraction has has 158 places, 258 transitions, 2010 flow [2021-10-15 20:26:03,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 205.33333333333334) internal successors, (616), 3 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:03,705 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:26:03,706 INFO L254 CegarLoopForPetriNet]: trace histogram [15, 15, 14, 14, 14, 14, 14, 14, 14, 13, 13, 11, 11, 9, 9, 7, 7, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 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, 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, 1, 1, 1] [2021-10-15 20:26:03,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-10-15 20:26:03,706 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:26:03,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:26:03,707 INFO L82 PathProgramCache]: Analyzing trace with hash -936317629, now seen corresponding path program 1 times [2021-10-15 20:26:03,707 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:26:03,708 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592979127] [2021-10-15 20:26:03,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:26:03,708 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:26:03,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:26:03,810 INFO L134 CoverageAnalysis]: Checked inductivity of 1416 backedges. 791 proven. 12 refuted. 0 times theorem prover too weak. 613 trivial. 0 not checked. [2021-10-15 20:26:03,811 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:26:03,811 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592979127] [2021-10-15 20:26:03,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592979127] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:26:03,811 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709897035] [2021-10-15 20:26:03,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:26:03,812 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:26:03,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66a9aff1-53de-445f-bb86-51723f36ccaf/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:26:03,815 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66a9aff1-53de-445f-bb86-51723f36ccaf/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:26:03,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66a9aff1-53de-445f-bb86-51723f36ccaf/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-15 20:26:04,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:26:04,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 653 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-15 20:26:04,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:26:05,101 INFO L134 CoverageAnalysis]: Checked inductivity of 1416 backedges. 791 proven. 12 refuted. 0 times theorem prover too weak. 613 trivial. 0 not checked. [2021-10-15 20:26:05,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709897035] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:26:05,102 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 20:26:05,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-10-15 20:26:05,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802696505] [2021-10-15 20:26:05,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 20:26:05,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:26:05,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 20:26:05,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 20:26:05,107 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 216 [2021-10-15 20:26:05,108 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 258 transitions, 2010 flow. Second operand has 4 states, 4 states have (on average 149.5) internal successors, (598), 4 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:05,108 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:26:05,108 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 216 [2021-10-15 20:26:05,109 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:26:09,153 INFO L129 PetriNetUnfolder]: 2734/12621 cut-off events. [2021-10-15 20:26:09,154 INFO L130 PetriNetUnfolder]: For 35438/35438 co-relation queries the response was YES. [2021-10-15 20:26:09,191 INFO L84 FinitePrefix]: Finished finitePrefix Result has 32572 conditions, 12621 events. 2734/12621 cut-off events. For 35438/35438 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 76133 event pairs, 0 based on Foata normal form. 162/11410 useless extension candidates. Maximal degree in co-relation 21386. Up to 5382 conditions per place. [2021-10-15 20:26:09,226 INFO L132 encePairwiseOnDemand]: 176/216 looper letters, 337 selfloop transitions, 19 changer transitions 2/447 dead transitions. [2021-10-15 20:26:09,227 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 447 transitions, 3903 flow [2021-10-15 20:26:09,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-15 20:26:09,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-10-15 20:26:09,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 875 transitions. [2021-10-15 20:26:09,231 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8101851851851852 [2021-10-15 20:26:09,232 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 875 transitions. [2021-10-15 20:26:09,232 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 875 transitions. [2021-10-15 20:26:09,233 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:26:09,233 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 875 transitions. [2021-10-15 20:26:09,236 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 175.0) internal successors, (875), 5 states have internal predecessors, (875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:09,240 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 216.0) internal successors, (1296), 6 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:09,241 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 216.0) internal successors, (1296), 6 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:09,241 INFO L186 Difference]: Start difference. First operand has 158 places, 258 transitions, 2010 flow. Second operand 5 states and 875 transitions. [2021-10-15 20:26:09,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 447 transitions, 3903 flow [2021-10-15 20:26:09,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 447 transitions, 3899 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 20:26:09,292 INFO L242 Difference]: Finished difference. Result has 164 places, 268 transitions, 2300 flow [2021-10-15 20:26:09,293 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=2006, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2300, PETRI_PLACES=164, PETRI_TRANSITIONS=268} [2021-10-15 20:26:09,293 INFO L334 CegarLoopForPetriNet]: 112 programPoint places, 52 predicate places. [2021-10-15 20:26:09,293 INFO L470 AbstractCegarLoop]: Abstraction has has 164 places, 268 transitions, 2300 flow [2021-10-15 20:26:09,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 149.5) internal successors, (598), 4 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:09,294 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:26:09,294 INFO L254 CegarLoopForPetriNet]: trace histogram [17, 17, 16, 16, 16, 15, 15, 15, 15, 13, 13, 11, 11, 9, 9, 7, 7, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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] [2021-10-15 20:26:09,340 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66a9aff1-53de-445f-bb86-51723f36ccaf/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-15 20:26:09,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66a9aff1-53de-445f-bb86-51723f36ccaf/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:26:09,518 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:26:09,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:26:09,519 INFO L82 PathProgramCache]: Analyzing trace with hash -282671301, now seen corresponding path program 1 times [2021-10-15 20:26:09,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:26:09,519 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440613162] [2021-10-15 20:26:09,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:26:09,520 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:26:09,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:26:09,646 INFO L134 CoverageAnalysis]: Checked inductivity of 1663 backedges. 968 proven. 6 refuted. 0 times theorem prover too weak. 689 trivial. 0 not checked. [2021-10-15 20:26:09,646 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:26:09,646 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440613162] [2021-10-15 20:26:09,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440613162] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:26:09,647 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657395711] [2021-10-15 20:26:09,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:26:09,647 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:26:09,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66a9aff1-53de-445f-bb86-51723f36ccaf/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:26:09,651 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66a9aff1-53de-445f-bb86-51723f36ccaf/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:26:09,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66a9aff1-53de-445f-bb86-51723f36ccaf/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-15 20:26:10,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:26:10,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 719 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-15 20:26:10,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:26:11,028 INFO L134 CoverageAnalysis]: Checked inductivity of 1663 backedges. 968 proven. 6 refuted. 0 times theorem prover too weak. 689 trivial. 0 not checked. [2021-10-15 20:26:11,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657395711] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:26:11,031 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 20:26:11,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-10-15 20:26:11,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681989634] [2021-10-15 20:26:11,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 20:26:11,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:26:11,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 20:26:11,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 20:26:11,034 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 216 [2021-10-15 20:26:11,035 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 268 transitions, 2300 flow. Second operand has 4 states, 4 states have (on average 149.0) internal successors, (596), 4 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:11,035 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:26:11,035 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 216 [2021-10-15 20:26:11,036 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:26:15,583 INFO L129 PetriNetUnfolder]: 3117/14672 cut-off events. [2021-10-15 20:26:15,583 INFO L130 PetriNetUnfolder]: For 38194/38194 co-relation queries the response was YES. [2021-10-15 20:26:15,629 INFO L84 FinitePrefix]: Finished finitePrefix Result has 37962 conditions, 14672 events. 3117/14672 cut-off events. For 38194/38194 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 94021 event pairs, 0 based on Foata normal form. 100/13215 useless extension candidates. Maximal degree in co-relation 27036. Up to 8224 conditions per place. [2021-10-15 20:26:15,665 INFO L132 encePairwiseOnDemand]: 178/216 looper letters, 322 selfloop transitions, 35 changer transitions 0/446 dead transitions. [2021-10-15 20:26:15,665 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 446 transitions, 4582 flow [2021-10-15 20:26:15,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 20:26:15,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 20:26:15,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 722 transitions. [2021-10-15 20:26:15,669 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8356481481481481 [2021-10-15 20:26:15,669 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 722 transitions. [2021-10-15 20:26:15,669 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 722 transitions. [2021-10-15 20:26:15,670 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:26:15,670 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 722 transitions. [2021-10-15 20:26:15,672 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 180.5) internal successors, (722), 4 states have internal predecessors, (722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:15,675 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 216.0) internal successors, (1080), 5 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:15,675 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 216.0) internal successors, (1080), 5 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:15,676 INFO L186 Difference]: Start difference. First operand has 164 places, 268 transitions, 2300 flow. Second operand 4 states and 722 transitions. [2021-10-15 20:26:15,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 446 transitions, 4582 flow [2021-10-15 20:26:15,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 446 transitions, 4580 flow, removed 1 selfloop flow, removed 0 redundant places. [2021-10-15 20:26:15,751 INFO L242 Difference]: Finished difference. Result has 170 places, 291 transitions, 3007 flow [2021-10-15 20:26:15,752 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=2143, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=3007, PETRI_PLACES=170, PETRI_TRANSITIONS=291} [2021-10-15 20:26:15,752 INFO L334 CegarLoopForPetriNet]: 112 programPoint places, 58 predicate places. [2021-10-15 20:26:15,752 INFO L470 AbstractCegarLoop]: Abstraction has has 170 places, 291 transitions, 3007 flow [2021-10-15 20:26:15,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 149.0) internal successors, (596), 4 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:15,753 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:26:15,753 INFO L254 CegarLoopForPetriNet]: trace histogram [18, 18, 17, 17, 17, 17, 16, 16, 16, 14, 14, 12, 12, 10, 10, 8, 8, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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] [2021-10-15 20:26:15,792 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66a9aff1-53de-445f-bb86-51723f36ccaf/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-15 20:26:15,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66a9aff1-53de-445f-bb86-51723f36ccaf/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:26:15,978 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:26:15,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:26:15,979 INFO L82 PathProgramCache]: Analyzing trace with hash -975324720, now seen corresponding path program 1 times [2021-10-15 20:26:15,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:26:15,979 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837607722] [2021-10-15 20:26:15,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:26:15,979 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:26:16,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:26:16,161 INFO L134 CoverageAnalysis]: Checked inductivity of 1970 backedges. 885 proven. 0 refuted. 0 times theorem prover too weak. 1085 trivial. 0 not checked. [2021-10-15 20:26:16,161 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:26:16,161 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837607722] [2021-10-15 20:26:16,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837607722] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:26:16,162 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:26:16,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 20:26:16,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100421613] [2021-10-15 20:26:16,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:26:16,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:26:16,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:26:16,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 20:26:16,165 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 216 [2021-10-15 20:26:16,165 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 291 transitions, 3007 flow. Second operand has 3 states, 3 states have (on average 151.66666666666666) internal successors, (455), 3 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:16,166 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:26:16,166 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 216 [2021-10-15 20:26:16,166 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:26:19,356 INFO L129 PetriNetUnfolder]: 2051/10341 cut-off events. [2021-10-15 20:26:19,356 INFO L130 PetriNetUnfolder]: For 23815/23815 co-relation queries the response was YES. [2021-10-15 20:26:19,391 INFO L84 FinitePrefix]: Finished finitePrefix Result has 26180 conditions, 10341 events. 2051/10341 cut-off events. For 23815/23815 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 59282 event pairs, 0 based on Foata normal form. 57/9347 useless extension candidates. Maximal degree in co-relation 25619. Up to 6526 conditions per place. [2021-10-15 20:26:19,407 INFO L132 encePairwiseOnDemand]: 211/216 looper letters, 149 selfloop transitions, 0 changer transitions 43/283 dead transitions. [2021-10-15 20:26:19,407 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 283 transitions, 2503 flow [2021-10-15 20:26:19,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:26:19,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:26:19,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 490 transitions. [2021-10-15 20:26:19,410 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7561728395061729 [2021-10-15 20:26:19,410 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 490 transitions. [2021-10-15 20:26:19,411 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 490 transitions. [2021-10-15 20:26:19,411 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:26:19,411 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 490 transitions. [2021-10-15 20:26:19,413 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 163.33333333333334) internal successors, (490), 3 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:19,415 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:19,416 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:19,416 INFO L186 Difference]: Start difference. First operand has 170 places, 291 transitions, 3007 flow. Second operand 3 states and 490 transitions. [2021-10-15 20:26:19,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 283 transitions, 2503 flow [2021-10-15 20:26:19,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 283 transitions, 2421 flow, removed 33 selfloop flow, removed 4 redundant places. [2021-10-15 20:26:19,512 INFO L242 Difference]: Finished difference. Result has 168 places, 240 transitions, 1837 flow [2021-10-15 20:26:19,512 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=1967, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1837, PETRI_PLACES=168, PETRI_TRANSITIONS=240} [2021-10-15 20:26:19,513 INFO L334 CegarLoopForPetriNet]: 112 programPoint places, 56 predicate places. [2021-10-15 20:26:19,513 INFO L470 AbstractCegarLoop]: Abstraction has has 168 places, 240 transitions, 1837 flow [2021-10-15 20:26:19,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 151.66666666666666) internal successors, (455), 3 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:19,513 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:26:19,514 INFO L254 CegarLoopForPetriNet]: trace histogram [19, 19, 18, 18, 18, 18, 18, 18, 18, 17, 17, 15, 15, 13, 13, 11, 11, 9, 9, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:26:19,514 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-10-15 20:26:19,515 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:26:19,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:26:19,516 INFO L82 PathProgramCache]: Analyzing trace with hash 185580188, now seen corresponding path program 1 times [2021-10-15 20:26:19,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:26:19,516 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297391749] [2021-10-15 20:26:19,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:26:19,517 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:26:19,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:26:19,653 INFO L134 CoverageAnalysis]: Checked inductivity of 2711 backedges. 1571 proven. 14 refuted. 0 times theorem prover too weak. 1126 trivial. 0 not checked. [2021-10-15 20:26:19,653 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:26:19,654 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297391749] [2021-10-15 20:26:19,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297391749] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:26:19,654 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204077165] [2021-10-15 20:26:19,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:26:19,655 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:26:19,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66a9aff1-53de-445f-bb86-51723f36ccaf/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:26:19,658 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66a9aff1-53de-445f-bb86-51723f36ccaf/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:26:19,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66a9aff1-53de-445f-bb86-51723f36ccaf/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-15 20:26:20,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:26:20,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 853 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-15 20:26:20,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:26:21,898 INFO L134 CoverageAnalysis]: Checked inductivity of 2711 backedges. 1018 proven. 0 refuted. 0 times theorem prover too weak. 1693 trivial. 0 not checked. [2021-10-15 20:26:21,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204077165] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:26:21,898 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:26:21,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-10-15 20:26:21,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573538846] [2021-10-15 20:26:21,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:26:21,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:26:21,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:26:21,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-15 20:26:21,902 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 216 [2021-10-15 20:26:21,902 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 240 transitions, 1837 flow. Second operand has 3 states, 3 states have (on average 205.66666666666666) internal successors, (617), 3 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:21,903 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:26:21,903 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 216 [2021-10-15 20:26:21,903 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:26:23,245 INFO L129 PetriNetUnfolder]: 1344/6245 cut-off events. [2021-10-15 20:26:23,246 INFO L130 PetriNetUnfolder]: For 15211/15211 co-relation queries the response was YES. [2021-10-15 20:26:23,280 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12208 conditions, 6245 events. 1344/6245 cut-off events. For 15211/15211 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 28972 event pairs, 0 based on Foata normal form. 12/5629 useless extension candidates. Maximal degree in co-relation 12180. Up to 725 conditions per place. [2021-10-15 20:26:23,293 INFO L132 encePairwiseOnDemand]: 214/216 looper letters, 6 selfloop transitions, 1 changer transitions 2/240 dead transitions. [2021-10-15 20:26:23,293 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 240 transitions, 1867 flow [2021-10-15 20:26:23,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:26:23,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:26:23,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 619 transitions. [2021-10-15 20:26:23,296 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9552469135802469 [2021-10-15 20:26:23,297 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 619 transitions. [2021-10-15 20:26:23,297 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 619 transitions. [2021-10-15 20:26:23,298 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:26:23,298 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 619 transitions. [2021-10-15 20:26:23,302 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 206.33333333333334) internal successors, (619), 3 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:23,304 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:23,304 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:23,305 INFO L186 Difference]: Start difference. First operand has 168 places, 240 transitions, 1837 flow. Second operand 3 states and 619 transitions. [2021-10-15 20:26:23,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 240 transitions, 1867 flow [2021-10-15 20:26:23,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 240 transitions, 1730 flow, removed 58 selfloop flow, removed 5 redundant places. [2021-10-15 20:26:23,353 INFO L242 Difference]: Finished difference. Result has 163 places, 238 transitions, 1706 flow [2021-10-15 20:26:23,355 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=1694, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1706, PETRI_PLACES=163, PETRI_TRANSITIONS=238} [2021-10-15 20:26:23,356 INFO L334 CegarLoopForPetriNet]: 112 programPoint places, 51 predicate places. [2021-10-15 20:26:23,356 INFO L470 AbstractCegarLoop]: Abstraction has has 163 places, 238 transitions, 1706 flow [2021-10-15 20:26:23,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 205.66666666666666) internal successors, (617), 3 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:23,357 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:26:23,357 INFO L254 CegarLoopForPetriNet]: trace histogram [18, 18, 17, 17, 17, 17, 17, 17, 17, 16, 16, 14, 14, 13, 13, 12, 12, 10, 10, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 6, 6, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:26:23,401 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66a9aff1-53de-445f-bb86-51723f36ccaf/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-10-15 20:26:23,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66a9aff1-53de-445f-bb86-51723f36ccaf/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:26:23,570 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:26:23,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:26:23,571 INFO L82 PathProgramCache]: Analyzing trace with hash 1012727590, now seen corresponding path program 1 times [2021-10-15 20:26:23,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:26:23,571 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670601336] [2021-10-15 20:26:23,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:26:23,572 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:26:23,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:26:23,717 INFO L134 CoverageAnalysis]: Checked inductivity of 2607 backedges. 1546 proven. 14 refuted. 0 times theorem prover too weak. 1047 trivial. 0 not checked. [2021-10-15 20:26:23,717 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:26:23,717 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670601336] [2021-10-15 20:26:23,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670601336] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:26:23,718 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215149699] [2021-10-15 20:26:23,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:26:23,719 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:26:23,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66a9aff1-53de-445f-bb86-51723f36ccaf/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:26:23,722 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66a9aff1-53de-445f-bb86-51723f36ccaf/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:26:23,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66a9aff1-53de-445f-bb86-51723f36ccaf/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-15 20:26:24,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:26:24,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 843 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-15 20:26:24,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:26:25,780 INFO L134 CoverageAnalysis]: Checked inductivity of 2607 backedges. 268 proven. 0 refuted. 0 times theorem prover too weak. 2339 trivial. 0 not checked. [2021-10-15 20:26:25,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215149699] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:26:25,781 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:26:25,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-10-15 20:26:25,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323298083] [2021-10-15 20:26:25,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:26:25,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:26:25,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:26:25,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-15 20:26:25,784 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 216 [2021-10-15 20:26:25,785 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 238 transitions, 1706 flow. Second operand has 3 states, 3 states have (on average 147.66666666666666) internal successors, (443), 3 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:25,785 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:26:25,785 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 216 [2021-10-15 20:26:25,785 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:26:27,110 INFO L129 PetriNetUnfolder]: 827/4339 cut-off events. [2021-10-15 20:26:27,111 INFO L130 PetriNetUnfolder]: For 10225/10225 co-relation queries the response was YES. [2021-10-15 20:26:27,126 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10448 conditions, 4339 events. 827/4339 cut-off events. For 10225/10225 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 17720 event pairs, 0 based on Foata normal form. 168/4035 useless extension candidates. Maximal degree in co-relation 10422. Up to 2023 conditions per place. [2021-10-15 20:26:27,135 INFO L132 encePairwiseOnDemand]: 193/216 looper letters, 152 selfloop transitions, 16 changer transitions 2/261 dead transitions. [2021-10-15 20:26:27,135 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 261 transitions, 1982 flow [2021-10-15 20:26:27,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:26:27,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:26:27,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 500 transitions. [2021-10-15 20:26:27,138 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7716049382716049 [2021-10-15 20:26:27,138 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 500 transitions. [2021-10-15 20:26:27,138 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 500 transitions. [2021-10-15 20:26:27,139 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:26:27,139 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 500 transitions. [2021-10-15 20:26:27,141 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 166.66666666666666) internal successors, (500), 3 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:27,143 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:27,144 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:27,144 INFO L186 Difference]: Start difference. First operand has 163 places, 238 transitions, 1706 flow. Second operand 3 states and 500 transitions. [2021-10-15 20:26:27,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 261 transitions, 1982 flow [2021-10-15 20:26:27,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 261 transitions, 1958 flow, removed 12 selfloop flow, removed 1 redundant places. [2021-10-15 20:26:27,172 INFO L242 Difference]: Finished difference. Result has 164 places, 227 transitions, 1632 flow [2021-10-15 20:26:27,172 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=1530, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1632, PETRI_PLACES=164, PETRI_TRANSITIONS=227} [2021-10-15 20:26:27,173 INFO L334 CegarLoopForPetriNet]: 112 programPoint places, 52 predicate places. [2021-10-15 20:26:27,173 INFO L470 AbstractCegarLoop]: Abstraction has has 164 places, 227 transitions, 1632 flow [2021-10-15 20:26:27,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 147.66666666666666) internal successors, (443), 3 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:27,174 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:26:27,175 INFO L254 CegarLoopForPetriNet]: trace histogram [21, 21, 20, 20, 20, 20, 20, 20, 20, 19, 19, 17, 17, 16, 16, 15, 15, 13, 13, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 8, 8, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:26:27,219 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66a9aff1-53de-445f-bb86-51723f36ccaf/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-15 20:26:27,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66a9aff1-53de-445f-bb86-51723f36ccaf/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-10-15 20:26:27,394 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:26:27,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:26:27,395 INFO L82 PathProgramCache]: Analyzing trace with hash 2021130623, now seen corresponding path program 2 times [2021-10-15 20:26:27,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:26:27,395 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085614458] [2021-10-15 20:26:27,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:26:27,395 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:26:27,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:26:27,559 INFO L134 CoverageAnalysis]: Checked inductivity of 3928 backedges. 2054 proven. 14 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2021-10-15 20:26:27,559 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:26:27,560 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085614458] [2021-10-15 20:26:27,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085614458] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:26:27,560 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490073696] [2021-10-15 20:26:27,560 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-15 20:26:27,560 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:26:27,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66a9aff1-53de-445f-bb86-51723f36ccaf/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:26:27,566 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66a9aff1-53de-445f-bb86-51723f36ccaf/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:26:27,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66a9aff1-53de-445f-bb86-51723f36ccaf/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-15 20:26:28,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-15 20:26:28,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 20:26:28,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 994 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-15 20:26:28,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:26:29,599 INFO L134 CoverageAnalysis]: Checked inductivity of 3928 backedges. 2054 proven. 14 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2021-10-15 20:26:29,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490073696] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:26:29,599 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 20:26:29,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-10-15 20:26:29,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248962722] [2021-10-15 20:26:29,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 20:26:29,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:26:29,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 20:26:29,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 20:26:29,602 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 216 [2021-10-15 20:26:29,602 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 227 transitions, 1632 flow. Second operand has 4 states, 4 states have (on average 156.5) internal successors, (626), 4 states have internal predecessors, (626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:29,603 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:26:29,603 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 216 [2021-10-15 20:26:29,603 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:26:29,823 INFO L129 PetriNetUnfolder]: 46/331 cut-off events. [2021-10-15 20:26:29,823 INFO L130 PetriNetUnfolder]: For 1041/1041 co-relation queries the response was YES. [2021-10-15 20:26:29,824 INFO L84 FinitePrefix]: Finished finitePrefix Result has 680 conditions, 331 events. 46/331 cut-off events. For 1041/1041 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 167 event pairs, 0 based on Foata normal form. 28/315 useless extension candidates. Maximal degree in co-relation 653. Up to 139 conditions per place. [2021-10-15 20:26:29,825 INFO L132 encePairwiseOnDemand]: 186/216 looper letters, 0 selfloop transitions, 0 changer transitions 176/176 dead transitions. [2021-10-15 20:26:29,825 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 176 transitions, 798 flow [2021-10-15 20:26:29,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 20:26:29,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 20:26:29,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 632 transitions. [2021-10-15 20:26:29,829 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7314814814814815 [2021-10-15 20:26:29,829 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 632 transitions. [2021-10-15 20:26:29,829 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 632 transitions. [2021-10-15 20:26:29,830 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:26:29,830 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 632 transitions. [2021-10-15 20:26:29,832 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 158.0) internal successors, (632), 4 states have internal predecessors, (632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:29,834 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 216.0) internal successors, (1080), 5 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:29,835 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 216.0) internal successors, (1080), 5 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:29,835 INFO L186 Difference]: Start difference. First operand has 164 places, 227 transitions, 1632 flow. Second operand 4 states and 632 transitions. [2021-10-15 20:26:29,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 176 transitions, 798 flow [2021-10-15 20:26:29,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 176 transitions, 699 flow, removed 12 selfloop flow, removed 25 redundant places. [2021-10-15 20:26:29,840 INFO L242 Difference]: Finished difference. Result has 110 places, 0 transitions, 0 flow [2021-10-15 20:26:29,841 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=307, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=110, PETRI_TRANSITIONS=0} [2021-10-15 20:26:29,841 INFO L334 CegarLoopForPetriNet]: 112 programPoint places, -2 predicate places. [2021-10-15 20:26:29,841 INFO L470 AbstractCegarLoop]: Abstraction has has 110 places, 0 transitions, 0 flow [2021-10-15 20:26:29,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 156.5) internal successors, (626), 4 states have internal predecessors, (626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:29,844 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 20:26:29,890 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66a9aff1-53de-445f-bb86-51723f36ccaf/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-15 20:26:30,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66a9aff1-53de-445f-bb86-51723f36ccaf/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-10-15 20:26:30,076 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-15 20:26:30,082 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 08:26:30 BoogieIcfgContainer [2021-10-15 20:26:30,082 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-15 20:26:30,083 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-15 20:26:30,083 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-15 20:26:30,083 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-15 20:26:30,084 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 08:25:45" (3/4) ... [2021-10-15 20:26:30,087 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-15 20:26:30,109 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2021-10-15 20:26:30,110 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-15 20:26:30,111 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 20:26:30,113 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 20:26:30,271 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66a9aff1-53de-445f-bb86-51723f36ccaf/bin/uautomizer-hJ6jxDFKc3/witness.graphml [2021-10-15 20:26:30,272 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-15 20:26:30,274 INFO L168 Benchmark]: Toolchain (without parser) took 45936.94 ms. Allocated memory was 94.4 MB in the beginning and 3.6 GB in the end (delta: 3.5 GB). Free memory was 59.3 MB in the beginning and 3.0 GB in the end (delta: -3.0 GB). Peak memory consumption was 598.1 MB. Max. memory is 16.1 GB. [2021-10-15 20:26:30,274 INFO L168 Benchmark]: CDTParser took 0.33 ms. Allocated memory is still 94.4 MB. Free memory was 65.8 MB in the beginning and 65.8 MB in the end (delta: 21.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 20:26:30,275 INFO L168 Benchmark]: CACSL2BoogieTranslator took 429.91 ms. Allocated memory is still 94.4 MB. Free memory was 59.1 MB in the beginning and 65.3 MB in the end (delta: -6.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-15 20:26:30,275 INFO L168 Benchmark]: Boogie Procedure Inliner took 94.00 ms. Allocated memory is still 94.4 MB. Free memory was 65.3 MB in the beginning and 62.3 MB in the end (delta: 3.0 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-15 20:26:30,276 INFO L168 Benchmark]: Boogie Preprocessor took 82.85 ms. Allocated memory is still 94.4 MB. Free memory was 62.3 MB in the beginning and 60.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 20:26:30,276 INFO L168 Benchmark]: RCFGBuilder took 940.64 ms. Allocated memory was 94.4 MB in the beginning and 117.4 MB in the end (delta: 23.1 MB). Free memory was 60.2 MB in the beginning and 90.3 MB in the end (delta: -30.0 MB). Peak memory consumption was 33.1 MB. Max. memory is 16.1 GB. [2021-10-15 20:26:30,277 INFO L168 Benchmark]: TraceAbstraction took 44192.85 ms. Allocated memory was 117.4 MB in the beginning and 3.6 GB in the end (delta: 3.5 GB). Free memory was 89.6 MB in the beginning and 3.0 GB in the end (delta: -2.9 GB). Peak memory consumption was 594.9 MB. Max. memory is 16.1 GB. [2021-10-15 20:26:30,277 INFO L168 Benchmark]: Witness Printer took 188.84 ms. Allocated memory is still 3.6 GB. Free memory was 3.0 GB in the beginning and 3.0 GB in the end (delta: 9.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-15 20:26:30,280 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33 ms. Allocated memory is still 94.4 MB. Free memory was 65.8 MB in the beginning and 65.8 MB in the end (delta: 21.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 429.91 ms. Allocated memory is still 94.4 MB. Free memory was 59.1 MB in the beginning and 65.3 MB in the end (delta: -6.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 94.00 ms. Allocated memory is still 94.4 MB. Free memory was 65.3 MB in the beginning and 62.3 MB in the end (delta: 3.0 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 82.85 ms. Allocated memory is still 94.4 MB. Free memory was 62.3 MB in the beginning and 60.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 940.64 ms. Allocated memory was 94.4 MB in the beginning and 117.4 MB in the end (delta: 23.1 MB). Free memory was 60.2 MB in the beginning and 90.3 MB in the end (delta: -30.0 MB). Peak memory consumption was 33.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 44192.85 ms. Allocated memory was 117.4 MB in the beginning and 3.6 GB in the end (delta: 3.5 GB). Free memory was 89.6 MB in the beginning and 3.0 GB in the end (delta: -2.9 GB). Peak memory consumption was 594.9 MB. Max. memory is 16.1 GB. * Witness Printer took 188.84 ms. Allocated memory is still 3.6 GB. Free memory was 3.0 GB in the beginning and 3.0 GB in the end (delta: 9.4 MB). Peak memory consumption was 10.5 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, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 584]: 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 CFG has 1 procedures, 128 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 12.8ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 44128.4ms, OverallIterations: 28, TraceHistogramMax: 21, EmptinessCheckTime: 0.0ms, AutomataDifference: 30523.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 84.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1471 SDtfs, 721 SDslu, 136 SDs, 0 SdLazy, 2501 SolverSat, 611 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2660.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2415 GetRequests, 2377 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 140.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=3007occurred in iteration=24, InterpolantAutomatonStates: 88, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 379.4ms SsaConstructionTime, 1534.2ms SatisfiabilityAnalysisTime, 8293.2ms InterpolantComputationTime, 8709 NumberOfCodeBlocks, 8709 NumberOfCodeBlocksAsserted, 34 NumberOfCheckSat, 8676 ConstructedInterpolants, 0 QuantifiedInterpolants, 11760 SizeOfPredicates, 3 NumberOfNonLiveVariables, 4062 ConjunctsInSsa, 14 ConjunctsInUnsatCore, 33 InterpolantComputations, 25 PerfectInterpolantSequences, 37583/37675 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! [2021-10-15 20:26:30,334 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66a9aff1-53de-445f-bb86-51723f36ccaf/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...