./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-figure3.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f8e1c903 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c571e0-6258-4e63-bef7-a3e5019b9b4f/bin/uautomizer-IVEQpCNsaX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c571e0-6258-4e63-bef7-a3e5019b9b4f/bin/uautomizer-IVEQpCNsaX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c571e0-6258-4e63-bef7-a3e5019b9b4f/bin/uautomizer-IVEQpCNsaX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c571e0-6258-4e63-bef7-a3e5019b9b4f/bin/uautomizer-IVEQpCNsaX/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-figure3.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c571e0-6258-4e63-bef7-a3e5019b9b4f/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c571e0-6258-4e63-bef7-a3e5019b9b4f/bin/uautomizer-IVEQpCNsaX --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 8978d351a1e877bd44e157215d417b40c01c7c886849af3efe046b60ddaacc95 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-f8e1c90 [2021-11-09 08:57:14,774 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-09 08:57:14,786 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-09 08:57:14,828 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-09 08:57:14,829 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-09 08:57:14,834 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-09 08:57:14,837 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-09 08:57:14,842 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-09 08:57:14,845 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-09 08:57:14,851 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-09 08:57:14,853 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-09 08:57:14,855 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-09 08:57:14,855 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-09 08:57:14,858 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-09 08:57:14,860 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-09 08:57:14,863 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-09 08:57:14,865 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-09 08:57:14,867 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-09 08:57:14,872 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-09 08:57:14,880 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-09 08:57:14,882 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-09 08:57:14,884 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-09 08:57:14,885 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-09 08:57:14,886 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-09 08:57:14,890 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-09 08:57:14,891 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-09 08:57:14,891 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-09 08:57:14,892 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-09 08:57:14,893 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-09 08:57:14,894 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-09 08:57:14,895 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-09 08:57:14,896 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-09 08:57:14,897 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-09 08:57:14,898 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-09 08:57:14,899 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-09 08:57:14,899 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-09 08:57:14,900 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-09 08:57:14,900 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-09 08:57:14,901 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-09 08:57:14,902 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-09 08:57:14,902 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-09 08:57:14,903 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c571e0-6258-4e63-bef7-a3e5019b9b4f/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-09 08:57:14,929 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-09 08:57:14,933 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-09 08:57:14,933 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-09 08:57:14,933 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-09 08:57:14,938 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-09 08:57:14,938 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-09 08:57:14,939 INFO L138 SettingsManager]: * Use SBE=true [2021-11-09 08:57:14,939 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-09 08:57:14,939 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-09 08:57:14,939 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-09 08:57:14,939 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-09 08:57:14,940 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-09 08:57:14,940 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-09 08:57:14,940 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-09 08:57:14,940 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-09 08:57:14,941 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-09 08:57:14,941 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-09 08:57:14,941 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-09 08:57:14,941 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-09 08:57:14,941 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-09 08:57:14,942 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-09 08:57:14,942 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-09 08:57:14,942 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 08:57:14,942 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-09 08:57:14,943 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-09 08:57:14,943 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-09 08:57:14,943 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-09 08:57:14,943 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-09 08:57:14,943 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-09 08:57:14,944 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-09 08:57:14,944 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-09 08:57:14,944 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-09 08:57:14,944 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_70c571e0-6258-4e63-bef7-a3e5019b9b4f/bin/uautomizer-IVEQpCNsaX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c571e0-6258-4e63-bef7-a3e5019b9b4f/bin/uautomizer-IVEQpCNsaX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8978d351a1e877bd44e157215d417b40c01c7c886849af3efe046b60ddaacc95 [2021-11-09 08:57:15,258 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-09 08:57:15,310 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-09 08:57:15,313 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-09 08:57:15,315 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-09 08:57:15,315 INFO L275 PluginConnector]: CDTParser initialized [2021-11-09 08:57:15,316 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c571e0-6258-4e63-bef7-a3e5019b9b4f/bin/uautomizer-IVEQpCNsaX/../../sv-benchmarks/c/weaver/popl20-figure3.wvr.c [2021-11-09 08:57:15,416 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c571e0-6258-4e63-bef7-a3e5019b9b4f/bin/uautomizer-IVEQpCNsaX/data/e147312c6/1e400784608748019ef83236b7b724fe/FLAG6a11b504d [2021-11-09 08:57:15,897 INFO L306 CDTParser]: Found 1 translation units. [2021-11-09 08:57:15,897 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c571e0-6258-4e63-bef7-a3e5019b9b4f/sv-benchmarks/c/weaver/popl20-figure3.wvr.c [2021-11-09 08:57:15,905 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c571e0-6258-4e63-bef7-a3e5019b9b4f/bin/uautomizer-IVEQpCNsaX/data/e147312c6/1e400784608748019ef83236b7b724fe/FLAG6a11b504d [2021-11-09 08:57:16,264 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c571e0-6258-4e63-bef7-a3e5019b9b4f/bin/uautomizer-IVEQpCNsaX/data/e147312c6/1e400784608748019ef83236b7b724fe [2021-11-09 08:57:16,266 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-09 08:57:16,268 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-09 08:57:16,276 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-09 08:57:16,276 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-09 08:57:16,283 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-09 08:57:16,284 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 08:57:16" (1/1) ... [2021-11-09 08:57:16,286 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66c720bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:57:16, skipping insertion in model container [2021-11-09 08:57:16,286 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 08:57:16" (1/1) ... [2021-11-09 08:57:16,300 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-09 08:57:16,323 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-09 08:57:16,643 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_70c571e0-6258-4e63-bef7-a3e5019b9b4f/sv-benchmarks/c/weaver/popl20-figure3.wvr.c[2121,2134] [2021-11-09 08:57:16,648 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 08:57:16,660 INFO L203 MainTranslator]: Completed pre-run [2021-11-09 08:57:16,703 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_70c571e0-6258-4e63-bef7-a3e5019b9b4f/sv-benchmarks/c/weaver/popl20-figure3.wvr.c[2121,2134] [2021-11-09 08:57:16,711 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 08:57:16,729 INFO L208 MainTranslator]: Completed translation [2021-11-09 08:57:16,729 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:57:16 WrapperNode [2021-11-09 08:57:16,730 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-09 08:57:16,731 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-09 08:57:16,732 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-09 08:57:16,732 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-09 08:57:16,740 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:57:16" (1/1) ... [2021-11-09 08:57:16,752 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:57:16" (1/1) ... [2021-11-09 08:57:16,787 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-09 08:57:16,789 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-09 08:57:16,789 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-09 08:57:16,789 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-09 08:57:16,799 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:57:16" (1/1) ... [2021-11-09 08:57:16,800 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:57:16" (1/1) ... [2021-11-09 08:57:16,815 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:57:16" (1/1) ... [2021-11-09 08:57:16,816 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:57:16" (1/1) ... [2021-11-09 08:57:16,821 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:57:16" (1/1) ... [2021-11-09 08:57:16,832 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:57:16" (1/1) ... [2021-11-09 08:57:16,841 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:57:16" (1/1) ... [2021-11-09 08:57:16,850 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-09 08:57:16,851 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-09 08:57:16,851 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-09 08:57:16,852 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-09 08:57:16,853 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:57:16" (1/1) ... [2021-11-09 08:57:16,865 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 08:57:16,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c571e0-6258-4e63-bef7-a3e5019b9b4f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:57:16,897 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c571e0-6258-4e63-bef7-a3e5019b9b4f/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-09 08:57:16,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c571e0-6258-4e63-bef7-a3e5019b9b4f/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-09 08:57:16,961 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-11-09 08:57:16,962 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-11-09 08:57:16,962 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-11-09 08:57:16,962 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-11-09 08:57:16,963 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-09 08:57:16,963 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-09 08:57:16,963 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-09 08:57:16,963 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-11-09 08:57:16,964 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-11-09 08:57:16,964 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-09 08:57:16,964 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-09 08:57:16,964 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-09 08:57:16,965 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-09 08:57:16,967 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-11-09 08:57:17,359 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-09 08:57:17,359 INFO L299 CfgBuilder]: Removed 12 assume(true) statements. [2021-11-09 08:57:17,362 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 08:57:17 BoogieIcfgContainer [2021-11-09 08:57:17,362 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-09 08:57:17,364 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-09 08:57:17,365 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-09 08:57:17,369 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-09 08:57:17,369 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 08:57:16" (1/3) ... [2021-11-09 08:57:17,370 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d9eb177 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 08:57:17, skipping insertion in model container [2021-11-09 08:57:17,370 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:57:16" (2/3) ... [2021-11-09 08:57:17,371 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d9eb177 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 08:57:17, skipping insertion in model container [2021-11-09 08:57:17,371 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 08:57:17" (3/3) ... [2021-11-09 08:57:17,373 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-figure3.wvr.c [2021-11-09 08:57:17,379 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-11-09 08:57:17,379 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-09 08:57:17,380 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-09 08:57:17,380 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-11-09 08:57:17,414 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:57:17,414 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:57:17,415 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:57:17,415 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:57:17,416 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:57:17,416 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:57:17,417 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:57:17,417 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:57:17,417 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:57:17,417 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:57:17,418 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:57:17,418 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:57:17,419 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:57:17,419 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:57:17,419 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:57:17,420 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:57:17,420 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:57:17,420 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:57:17,421 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:57:17,421 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:57:17,422 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:57:17,422 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:57:17,422 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:57:17,423 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:57:17,423 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:57:17,424 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:57:17,424 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:57:17,424 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:57:17,425 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:57:17,425 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:57:17,425 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:57:17,426 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:57:17,426 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:57:17,426 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:57:17,427 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:57:17,427 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:57:17,428 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:57:17,428 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:57:17,428 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:57:17,429 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:57:17,429 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:57:17,429 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:57:17,430 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:57:17,430 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:57:17,433 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:57:17,434 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:57:17,434 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:57:17,435 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:57:17,438 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:57:17,438 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:57:17,439 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:57:17,439 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:57:17,439 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:57:17,440 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:57:17,450 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-11-09 08:57:17,523 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-09 08:57:17,530 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-09 08:57:17,531 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-11-09 08:57:17,550 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 80 places, 79 transitions, 174 flow [2021-11-09 08:57:17,616 INFO L129 PetriNetUnfolder]: 6/77 cut-off events. [2021-11-09 08:57:17,616 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-11-09 08:57:17,621 INFO L84 FinitePrefix]: Finished finitePrefix Result has 86 conditions, 77 events. 6/77 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 52 event pairs, 0 based on Foata normal form. 0/70 useless extension candidates. Maximal degree in co-relation 45. Up to 2 conditions per place. [2021-11-09 08:57:17,621 INFO L82 GeneralOperation]: Start removeDead. Operand has 80 places, 79 transitions, 174 flow [2021-11-09 08:57:17,628 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 70 places, 69 transitions, 150 flow [2021-11-09 08:57:17,670 INFO L129 PetriNetUnfolder]: 6/68 cut-off events. [2021-11-09 08:57:17,671 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-11-09 08:57:17,671 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 08:57:17,672 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:57:17,673 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 08:57:17,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:57:17,680 INFO L85 PathProgramCache]: Analyzing trace with hash -1170516521, now seen corresponding path program 1 times [2021-11-09 08:57:17,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:57:17,693 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694730337] [2021-11-09 08:57:17,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:57:17,695 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:57:17,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:57:17,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:57:17,948 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:57:17,949 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694730337] [2021-11-09 08:57:17,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694730337] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:57:17,950 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:57:17,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-09 08:57:17,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717748008] [2021-11-09 08:57:17,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-09 08:57:17,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:57:17,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-09 08:57:17,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-09 08:57:17,987 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 79 [2021-11-09 08:57:17,991 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 69 transitions, 150 flow. Second operand has 2 states, 2 states have (on average 74.5) internal successors, (149), 2 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:17,992 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 08:57:17,992 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 79 [2021-11-09 08:57:17,994 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 08:57:18,025 INFO L129 PetriNetUnfolder]: 2/65 cut-off events. [2021-11-09 08:57:18,025 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-11-09 08:57:18,027 INFO L84 FinitePrefix]: Finished finitePrefix Result has 75 conditions, 65 events. 2/65 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 45 event pairs, 0 based on Foata normal form. 4/65 useless extension candidates. Maximal degree in co-relation 71. Up to 2 conditions per place. [2021-11-09 08:57:18,029 INFO L132 encePairwiseOnDemand]: 75/79 looper letters, 0 selfloop transitions, 0 changer transitions 2/65 dead transitions. [2021-11-09 08:57:18,029 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 65 transitions, 142 flow [2021-11-09 08:57:18,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-09 08:57:18,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-11-09 08:57:18,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 152 transitions. [2021-11-09 08:57:18,045 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9620253164556962 [2021-11-09 08:57:18,046 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 152 transitions. [2021-11-09 08:57:18,047 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 152 transitions. [2021-11-09 08:57:18,049 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 08:57:18,052 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 152 transitions. [2021-11-09 08:57:18,056 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 76.0) internal successors, (152), 2 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:18,061 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 79.0) internal successors, (237), 3 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:18,062 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 79.0) internal successors, (237), 3 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:18,065 INFO L186 Difference]: Start difference. First operand has 70 places, 69 transitions, 150 flow. Second operand 2 states and 152 transitions. [2021-11-09 08:57:18,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 65 transitions, 142 flow [2021-11-09 08:57:18,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 65 transitions, 134 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-11-09 08:57:18,075 INFO L242 Difference]: Finished difference. Result has 67 places, 63 transitions, 130 flow [2021-11-09 08:57:18,078 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=130, PETRI_PLACES=67, PETRI_TRANSITIONS=63} [2021-11-09 08:57:18,079 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, -3 predicate places. [2021-11-09 08:57:18,079 INFO L470 AbstractCegarLoop]: Abstraction has has 67 places, 63 transitions, 130 flow [2021-11-09 08:57:18,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 74.5) internal successors, (149), 2 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:18,080 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 08:57:18,080 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:57:18,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-09 08:57:18,081 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 08:57:18,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:57:18,083 INFO L85 PathProgramCache]: Analyzing trace with hash -1367030026, now seen corresponding path program 1 times [2021-11-09 08:57:18,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:57:18,083 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484685747] [2021-11-09 08:57:18,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:57:18,084 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:57:18,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:57:18,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:57:18,329 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:57:18,329 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484685747] [2021-11-09 08:57:18,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484685747] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:57:18,330 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:57:18,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 08:57:18,330 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734786626] [2021-11-09 08:57:18,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 08:57:18,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:57:18,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 08:57:18,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-09 08:57:18,335 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 79 [2021-11-09 08:57:18,336 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 63 transitions, 130 flow. Second operand has 5 states, 5 states have (on average 62.8) internal successors, (314), 5 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:18,337 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 08:57:18,337 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 79 [2021-11-09 08:57:18,337 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 08:57:18,416 INFO L129 PetriNetUnfolder]: 4/83 cut-off events. [2021-11-09 08:57:18,417 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-11-09 08:57:18,418 INFO L84 FinitePrefix]: Finished finitePrefix Result has 105 conditions, 83 events. 4/83 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 94 event pairs, 0 based on Foata normal form. 2/79 useless extension candidates. Maximal degree in co-relation 102. Up to 10 conditions per place. [2021-11-09 08:57:18,419 INFO L132 encePairwiseOnDemand]: 73/79 looper letters, 10 selfloop transitions, 2 changer transitions 3/67 dead transitions. [2021-11-09 08:57:18,419 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 67 transitions, 168 flow [2021-11-09 08:57:18,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 08:57:18,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-11-09 08:57:18,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 322 transitions. [2021-11-09 08:57:18,439 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8151898734177215 [2021-11-09 08:57:18,439 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 322 transitions. [2021-11-09 08:57:18,440 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 322 transitions. [2021-11-09 08:57:18,441 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 08:57:18,441 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 322 transitions. [2021-11-09 08:57:18,444 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 64.4) internal successors, (322), 5 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:18,448 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 79.0) internal successors, (474), 6 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:18,449 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 79.0) internal successors, (474), 6 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:18,449 INFO L186 Difference]: Start difference. First operand has 67 places, 63 transitions, 130 flow. Second operand 5 states and 322 transitions. [2021-11-09 08:57:18,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 67 transitions, 168 flow [2021-11-09 08:57:18,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 67 transitions, 168 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-11-09 08:57:18,454 INFO L242 Difference]: Finished difference. Result has 72 places, 64 transitions, 148 flow [2021-11-09 08:57:18,454 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=148, PETRI_PLACES=72, PETRI_TRANSITIONS=64} [2021-11-09 08:57:18,455 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 2 predicate places. [2021-11-09 08:57:18,455 INFO L470 AbstractCegarLoop]: Abstraction has has 72 places, 64 transitions, 148 flow [2021-11-09 08:57:18,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 62.8) internal successors, (314), 5 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:18,456 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 08:57:18,456 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:57:18,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-09 08:57:18,457 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 08:57:18,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:57:18,457 INFO L85 PathProgramCache]: Analyzing trace with hash -1072918054, now seen corresponding path program 1 times [2021-11-09 08:57:18,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:57:18,458 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668401420] [2021-11-09 08:57:18,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:57:18,458 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:57:18,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:57:18,712 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:57:18,713 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:57:18,713 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668401420] [2021-11-09 08:57:18,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668401420] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:57:18,715 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:57:18,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 08:57:18,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944509319] [2021-11-09 08:57:18,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 08:57:18,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:57:18,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 08:57:18,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-09 08:57:18,724 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 79 [2021-11-09 08:57:18,725 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 64 transitions, 148 flow. Second operand has 5 states, 5 states have (on average 62.2) internal successors, (311), 5 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:18,725 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 08:57:18,726 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 79 [2021-11-09 08:57:18,727 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 08:57:18,910 INFO L129 PetriNetUnfolder]: 63/223 cut-off events. [2021-11-09 08:57:18,911 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2021-11-09 08:57:18,916 INFO L84 FinitePrefix]: Finished finitePrefix Result has 387 conditions, 223 events. 63/223 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 876 event pairs, 23 based on Foata normal form. 0/197 useless extension candidates. Maximal degree in co-relation 380. Up to 72 conditions per place. [2021-11-09 08:57:18,920 INFO L132 encePairwiseOnDemand]: 71/79 looper letters, 26 selfloop transitions, 7 changer transitions 1/84 dead transitions. [2021-11-09 08:57:18,920 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 84 transitions, 258 flow [2021-11-09 08:57:18,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 08:57:18,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-11-09 08:57:18,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 336 transitions. [2021-11-09 08:57:18,927 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.850632911392405 [2021-11-09 08:57:18,927 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 336 transitions. [2021-11-09 08:57:18,928 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 336 transitions. [2021-11-09 08:57:18,928 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 08:57:18,928 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 336 transitions. [2021-11-09 08:57:18,931 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 67.2) internal successors, (336), 5 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:18,935 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 79.0) internal successors, (474), 6 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:18,936 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 79.0) internal successors, (474), 6 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:18,936 INFO L186 Difference]: Start difference. First operand has 72 places, 64 transitions, 148 flow. Second operand 5 states and 336 transitions. [2021-11-09 08:57:18,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 84 transitions, 258 flow [2021-11-09 08:57:18,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 84 transitions, 252 flow, removed 2 selfloop flow, removed 3 redundant places. [2021-11-09 08:57:18,942 INFO L242 Difference]: Finished difference. Result has 74 places, 70 transitions, 193 flow [2021-11-09 08:57:18,942 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=193, PETRI_PLACES=74, PETRI_TRANSITIONS=70} [2021-11-09 08:57:18,943 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 4 predicate places. [2021-11-09 08:57:18,947 INFO L470 AbstractCegarLoop]: Abstraction has has 74 places, 70 transitions, 193 flow [2021-11-09 08:57:18,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 62.2) internal successors, (311), 5 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:18,947 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 08:57:18,948 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:57:18,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-09 08:57:18,949 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 08:57:18,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:57:18,949 INFO L85 PathProgramCache]: Analyzing trace with hash -1200437606, now seen corresponding path program 2 times [2021-11-09 08:57:18,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:57:18,956 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379552490] [2021-11-09 08:57:18,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:57:18,957 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:57:19,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:57:19,197 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:57:19,197 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:57:19,198 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379552490] [2021-11-09 08:57:19,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379552490] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:57:19,198 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985328653] [2021-11-09 08:57:19,199 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:57:19,199 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:57:19,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c571e0-6258-4e63-bef7-a3e5019b9b4f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:57:19,203 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c571e0-6258-4e63-bef7-a3e5019b9b4f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:57:19,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c571e0-6258-4e63-bef7-a3e5019b9b4f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-09 08:57:19,324 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:57:19,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:57:19,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-09 08:57:19,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:57:19,697 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:57:19,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985328653] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:57:19,709 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:57:19,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-11-09 08:57:19,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031506936] [2021-11-09 08:57:19,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 08:57:19,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:57:19,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 08:57:19,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-09 08:57:19,715 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 79 [2021-11-09 08:57:19,716 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 70 transitions, 193 flow. Second operand has 6 states, 6 states have (on average 62.166666666666664) internal successors, (373), 6 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:19,717 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 08:57:19,717 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 79 [2021-11-09 08:57:19,717 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 08:57:19,904 INFO L129 PetriNetUnfolder]: 72/268 cut-off events. [2021-11-09 08:57:19,904 INFO L130 PetriNetUnfolder]: For 67/67 co-relation queries the response was YES. [2021-11-09 08:57:19,905 INFO L84 FinitePrefix]: Finished finitePrefix Result has 577 conditions, 268 events. 72/268 cut-off events. For 67/67 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1185 event pairs, 9 based on Foata normal form. 5/268 useless extension candidates. Maximal degree in co-relation 569. Up to 61 conditions per place. [2021-11-09 08:57:19,909 INFO L132 encePairwiseOnDemand]: 71/79 looper letters, 35 selfloop transitions, 11 changer transitions 1/97 dead transitions. [2021-11-09 08:57:19,909 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 97 transitions, 383 flow [2021-11-09 08:57:19,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 08:57:19,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-11-09 08:57:19,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 468 transitions. [2021-11-09 08:57:19,912 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8462929475587704 [2021-11-09 08:57:19,912 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 468 transitions. [2021-11-09 08:57:19,912 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 468 transitions. [2021-11-09 08:57:19,913 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 08:57:19,913 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 468 transitions. [2021-11-09 08:57:19,915 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 66.85714285714286) internal successors, (468), 7 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:19,917 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 79.0) internal successors, (632), 8 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) [2021-11-09 08:57:19,918 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 79.0) internal successors, (632), 8 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) [2021-11-09 08:57:19,918 INFO L186 Difference]: Start difference. First operand has 74 places, 70 transitions, 193 flow. Second operand 7 states and 468 transitions. [2021-11-09 08:57:19,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 97 transitions, 383 flow [2021-11-09 08:57:19,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 97 transitions, 383 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-11-09 08:57:19,929 INFO L242 Difference]: Finished difference. Result has 85 places, 75 transitions, 269 flow [2021-11-09 08:57:19,930 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=193, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=269, PETRI_PLACES=85, PETRI_TRANSITIONS=75} [2021-11-09 08:57:19,930 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 15 predicate places. [2021-11-09 08:57:19,931 INFO L470 AbstractCegarLoop]: Abstraction has has 85 places, 75 transitions, 269 flow [2021-11-09 08:57:19,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 62.166666666666664) internal successors, (373), 6 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:19,932 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 08:57:19,933 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:57:19,969 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c571e0-6258-4e63-bef7-a3e5019b9b4f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-09 08:57:20,158 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c571e0-6258-4e63-bef7-a3e5019b9b4f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-11-09 08:57:20,158 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 08:57:20,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:57:20,159 INFO L85 PathProgramCache]: Analyzing trace with hash 1524861410, now seen corresponding path program 3 times [2021-11-09 08:57:20,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:57:20,159 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458348388] [2021-11-09 08:57:20,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:57:20,160 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:57:20,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:57:20,257 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:57:20,258 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:57:20,258 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458348388] [2021-11-09 08:57:20,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458348388] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:57:20,259 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:57:20,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 08:57:20,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688427149] [2021-11-09 08:57:20,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 08:57:20,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:57:20,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 08:57:20,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 08:57:20,264 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 79 [2021-11-09 08:57:20,264 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 75 transitions, 269 flow. Second operand has 5 states, 5 states have (on average 62.2) internal successors, (311), 5 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:20,265 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 08:57:20,265 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 79 [2021-11-09 08:57:20,265 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 08:57:20,405 INFO L129 PetriNetUnfolder]: 82/309 cut-off events. [2021-11-09 08:57:20,405 INFO L130 PetriNetUnfolder]: For 315/315 co-relation queries the response was YES. [2021-11-09 08:57:20,407 INFO L84 FinitePrefix]: Finished finitePrefix Result has 797 conditions, 309 events. 82/309 cut-off events. For 315/315 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1510 event pairs, 23 based on Foata normal form. 3/306 useless extension candidates. Maximal degree in co-relation 784. Up to 100 conditions per place. [2021-11-09 08:57:20,411 INFO L132 encePairwiseOnDemand]: 71/79 looper letters, 33 selfloop transitions, 11 changer transitions 7/101 dead transitions. [2021-11-09 08:57:20,411 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 101 transitions, 511 flow [2021-11-09 08:57:20,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 08:57:20,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-11-09 08:57:20,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 402 transitions. [2021-11-09 08:57:20,414 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8481012658227848 [2021-11-09 08:57:20,414 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 402 transitions. [2021-11-09 08:57:20,414 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 402 transitions. [2021-11-09 08:57:20,415 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 08:57:20,415 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 402 transitions. [2021-11-09 08:57:20,417 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 67.0) internal successors, (402), 6 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:20,419 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 79.0) internal successors, (553), 7 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:20,420 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 79.0) internal successors, (553), 7 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:20,420 INFO L186 Difference]: Start difference. First operand has 85 places, 75 transitions, 269 flow. Second operand 6 states and 402 transitions. [2021-11-09 08:57:20,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 101 transitions, 511 flow [2021-11-09 08:57:20,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 101 transitions, 494 flow, removed 2 selfloop flow, removed 2 redundant places. [2021-11-09 08:57:20,431 INFO L242 Difference]: Finished difference. Result has 92 places, 80 transitions, 346 flow [2021-11-09 08:57:20,432 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=346, PETRI_PLACES=92, PETRI_TRANSITIONS=80} [2021-11-09 08:57:20,432 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 22 predicate places. [2021-11-09 08:57:20,432 INFO L470 AbstractCegarLoop]: Abstraction has has 92 places, 80 transitions, 346 flow [2021-11-09 08:57:20,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 62.2) internal successors, (311), 5 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:20,433 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 08:57:20,433 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:57:20,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-09 08:57:20,434 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 08:57:20,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:57:20,435 INFO L85 PathProgramCache]: Analyzing trace with hash 527674312, now seen corresponding path program 4 times [2021-11-09 08:57:20,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:57:20,435 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560147654] [2021-11-09 08:57:20,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:57:20,437 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:57:20,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:57:20,572 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:57:20,572 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:57:20,573 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560147654] [2021-11-09 08:57:20,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560147654] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:57:20,573 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671115594] [2021-11-09 08:57:20,573 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 08:57:20,574 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:57:20,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c571e0-6258-4e63-bef7-a3e5019b9b4f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:57:20,582 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c571e0-6258-4e63-bef7-a3e5019b9b4f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:57:20,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c571e0-6258-4e63-bef7-a3e5019b9b4f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-09 08:57:20,685 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 08:57:20,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:57:20,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-09 08:57:20,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:57:20,946 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:57:20,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671115594] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:57:20,947 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:57:20,947 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-11-09 08:57:20,947 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731721059] [2021-11-09 08:57:20,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 08:57:20,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:57:20,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 08:57:20,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-09 08:57:20,950 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 79 [2021-11-09 08:57:20,951 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 80 transitions, 346 flow. Second operand has 6 states, 6 states have (on average 62.166666666666664) internal successors, (373), 6 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:20,951 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 08:57:20,951 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 79 [2021-11-09 08:57:20,951 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 08:57:21,101 INFO L129 PetriNetUnfolder]: 99/360 cut-off events. [2021-11-09 08:57:21,101 INFO L130 PetriNetUnfolder]: For 631/631 co-relation queries the response was YES. [2021-11-09 08:57:21,104 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1031 conditions, 360 events. 99/360 cut-off events. For 631/631 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1726 event pairs, 39 based on Foata normal form. 8/356 useless extension candidates. Maximal degree in co-relation 1013. Up to 92 conditions per place. [2021-11-09 08:57:21,108 INFO L132 encePairwiseOnDemand]: 72/79 looper letters, 34 selfloop transitions, 19 changer transitions 1/104 dead transitions. [2021-11-09 08:57:21,108 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 104 transitions, 611 flow [2021-11-09 08:57:21,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 08:57:21,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-11-09 08:57:21,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 400 transitions. [2021-11-09 08:57:21,111 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8438818565400844 [2021-11-09 08:57:21,111 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 400 transitions. [2021-11-09 08:57:21,112 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 400 transitions. [2021-11-09 08:57:21,112 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 08:57:21,112 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 400 transitions. [2021-11-09 08:57:21,114 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 66.66666666666667) internal successors, (400), 6 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) [2021-11-09 08:57:21,116 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 79.0) internal successors, (553), 7 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:21,116 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 79.0) internal successors, (553), 7 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:21,117 INFO L186 Difference]: Start difference. First operand has 92 places, 80 transitions, 346 flow. Second operand 6 states and 400 transitions. [2021-11-09 08:57:21,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 104 transitions, 611 flow [2021-11-09 08:57:21,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 104 transitions, 579 flow, removed 12 selfloop flow, removed 2 redundant places. [2021-11-09 08:57:21,127 INFO L242 Difference]: Finished difference. Result has 97 places, 87 transitions, 464 flow [2021-11-09 08:57:21,127 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=316, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=464, PETRI_PLACES=97, PETRI_TRANSITIONS=87} [2021-11-09 08:57:21,127 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 27 predicate places. [2021-11-09 08:57:21,127 INFO L470 AbstractCegarLoop]: Abstraction has has 97 places, 87 transitions, 464 flow [2021-11-09 08:57:21,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 62.166666666666664) internal successors, (373), 6 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:21,128 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 08:57:21,128 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:57:21,176 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c571e0-6258-4e63-bef7-a3e5019b9b4f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-09 08:57:21,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c571e0-6258-4e63-bef7-a3e5019b9b4f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:57:21,354 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 08:57:21,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:57:21,355 INFO L85 PathProgramCache]: Analyzing trace with hash -160650238, now seen corresponding path program 5 times [2021-11-09 08:57:21,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:57:21,356 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731369706] [2021-11-09 08:57:21,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:57:21,356 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:57:21,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:57:21,485 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:57:21,486 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:57:21,486 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731369706] [2021-11-09 08:57:21,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731369706] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:57:21,486 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:57:21,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 08:57:21,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633385043] [2021-11-09 08:57:21,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 08:57:21,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:57:21,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 08:57:21,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-09 08:57:21,489 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 79 [2021-11-09 08:57:21,490 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 87 transitions, 464 flow. Second operand has 5 states, 5 states have (on average 62.2) internal successors, (311), 5 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:21,490 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 08:57:21,490 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 79 [2021-11-09 08:57:21,490 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 08:57:21,605 INFO L129 PetriNetUnfolder]: 97/329 cut-off events. [2021-11-09 08:57:21,606 INFO L130 PetriNetUnfolder]: For 803/805 co-relation queries the response was YES. [2021-11-09 08:57:21,608 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1059 conditions, 329 events. 97/329 cut-off events. For 803/805 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1446 event pairs, 39 based on Foata normal form. 2/318 useless extension candidates. Maximal degree in co-relation 1039. Up to 98 conditions per place. [2021-11-09 08:57:21,611 INFO L132 encePairwiseOnDemand]: 72/79 looper letters, 32 selfloop transitions, 11 changer transitions 2/95 dead transitions. [2021-11-09 08:57:21,611 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 95 transitions, 610 flow [2021-11-09 08:57:21,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 08:57:21,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-11-09 08:57:21,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 386 transitions. [2021-11-09 08:57:21,614 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8143459915611815 [2021-11-09 08:57:21,614 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 386 transitions. [2021-11-09 08:57:21,614 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 386 transitions. [2021-11-09 08:57:21,614 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 08:57:21,615 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 386 transitions. [2021-11-09 08:57:21,616 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 64.33333333333333) internal successors, (386), 6 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:21,618 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 79.0) internal successors, (553), 7 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:21,619 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 79.0) internal successors, (553), 7 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:21,619 INFO L186 Difference]: Start difference. First operand has 97 places, 87 transitions, 464 flow. Second operand 6 states and 386 transitions. [2021-11-09 08:57:21,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 95 transitions, 610 flow [2021-11-09 08:57:21,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 95 transitions, 594 flow, removed 8 selfloop flow, removed 1 redundant places. [2021-11-09 08:57:21,629 INFO L242 Difference]: Finished difference. Result has 103 places, 87 transitions, 487 flow [2021-11-09 08:57:21,629 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=448, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=487, PETRI_PLACES=103, PETRI_TRANSITIONS=87} [2021-11-09 08:57:21,630 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 33 predicate places. [2021-11-09 08:57:21,630 INFO L470 AbstractCegarLoop]: Abstraction has has 103 places, 87 transitions, 487 flow [2021-11-09 08:57:21,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 62.2) internal successors, (311), 5 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:21,638 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 08:57:21,638 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:57:21,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-09 08:57:21,639 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 08:57:21,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:57:21,639 INFO L85 PathProgramCache]: Analyzing trace with hash -767024922, now seen corresponding path program 1 times [2021-11-09 08:57:21,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:57:21,640 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485548655] [2021-11-09 08:57:21,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:57:21,640 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:57:21,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:57:21,814 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:57:21,814 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:57:21,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485548655] [2021-11-09 08:57:21,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485548655] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:57:21,815 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274414763] [2021-11-09 08:57:21,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:57:21,815 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:57:21,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c571e0-6258-4e63-bef7-a3e5019b9b4f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:57:21,816 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c571e0-6258-4e63-bef7-a3e5019b9b4f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:57:21,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c571e0-6258-4e63-bef7-a3e5019b9b4f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-09 08:57:21,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:57:21,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-09 08:57:21,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:57:22,189 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 08:57:22,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274414763] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:57:22,189 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:57:22,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-11-09 08:57:22,190 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182461981] [2021-11-09 08:57:22,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 08:57:22,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:57:22,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 08:57:22,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-09 08:57:22,192 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 79 [2021-11-09 08:57:22,193 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 87 transitions, 487 flow. Second operand has 7 states, 7 states have (on average 61.142857142857146) internal successors, (428), 7 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) [2021-11-09 08:57:22,193 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 08:57:22,193 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 79 [2021-11-09 08:57:22,193 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 08:57:22,306 INFO L129 PetriNetUnfolder]: 53/349 cut-off events. [2021-11-09 08:57:22,306 INFO L130 PetriNetUnfolder]: For 747/778 co-relation queries the response was YES. [2021-11-09 08:57:22,309 INFO L84 FinitePrefix]: Finished finitePrefix Result has 957 conditions, 349 events. 53/349 cut-off events. For 747/778 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1819 event pairs, 12 based on Foata normal form. 5/350 useless extension candidates. Maximal degree in co-relation 934. Up to 50 conditions per place. [2021-11-09 08:57:22,311 INFO L132 encePairwiseOnDemand]: 71/79 looper letters, 14 selfloop transitions, 7 changer transitions 3/97 dead transitions. [2021-11-09 08:57:22,312 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 97 transitions, 561 flow [2021-11-09 08:57:22,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 08:57:22,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-11-09 08:57:22,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 438 transitions. [2021-11-09 08:57:22,314 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7920433996383364 [2021-11-09 08:57:22,314 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 438 transitions. [2021-11-09 08:57:22,314 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 438 transitions. [2021-11-09 08:57:22,315 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 08:57:22,315 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 438 transitions. [2021-11-09 08:57:22,317 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 62.57142857142857) internal successors, (438), 7 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:22,318 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 79.0) internal successors, (632), 8 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) [2021-11-09 08:57:22,319 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 79.0) internal successors, (632), 8 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) [2021-11-09 08:57:22,319 INFO L186 Difference]: Start difference. First operand has 103 places, 87 transitions, 487 flow. Second operand 7 states and 438 transitions. [2021-11-09 08:57:22,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 97 transitions, 561 flow [2021-11-09 08:57:22,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 97 transitions, 520 flow, removed 4 selfloop flow, removed 6 redundant places. [2021-11-09 08:57:22,328 INFO L242 Difference]: Finished difference. Result has 105 places, 90 transitions, 494 flow [2021-11-09 08:57:22,328 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=446, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=494, PETRI_PLACES=105, PETRI_TRANSITIONS=90} [2021-11-09 08:57:22,328 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 35 predicate places. [2021-11-09 08:57:22,329 INFO L470 AbstractCegarLoop]: Abstraction has has 105 places, 90 transitions, 494 flow [2021-11-09 08:57:22,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 61.142857142857146) internal successors, (428), 7 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) [2021-11-09 08:57:22,329 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 08:57:22,329 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2021-11-09 08:57:22,369 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c571e0-6258-4e63-bef7-a3e5019b9b4f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-09 08:57:22,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c571e0-6258-4e63-bef7-a3e5019b9b4f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:57:22,554 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 08:57:22,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:57:22,555 INFO L85 PathProgramCache]: Analyzing trace with hash -204221176, now seen corresponding path program 2 times [2021-11-09 08:57:22,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:57:22,555 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850424703] [2021-11-09 08:57:22,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:57:22,556 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:57:22,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:57:22,727 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:57:22,727 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:57:22,727 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850424703] [2021-11-09 08:57:22,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850424703] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:57:22,728 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268630782] [2021-11-09 08:57:22,728 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:57:22,728 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:57:22,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c571e0-6258-4e63-bef7-a3e5019b9b4f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:57:22,729 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c571e0-6258-4e63-bef7-a3e5019b9b4f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:57:22,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c571e0-6258-4e63-bef7-a3e5019b9b4f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-09 08:57:22,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:57:22,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:57:22,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-09 08:57:22,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:57:23,265 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:57:23,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268630782] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:57:23,269 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:57:23,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-11-09 08:57:23,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010912558] [2021-11-09 08:57:23,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-09 08:57:23,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:57:23,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-09 08:57:23,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-09 08:57:23,276 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 79 [2021-11-09 08:57:23,277 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 90 transitions, 494 flow. Second operand has 11 states, 11 states have (on average 60.36363636363637) internal successors, (664), 11 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:23,277 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 08:57:23,277 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 79 [2021-11-09 08:57:23,278 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 08:57:23,679 INFO L129 PetriNetUnfolder]: 219/773 cut-off events. [2021-11-09 08:57:23,679 INFO L130 PetriNetUnfolder]: For 1452/1459 co-relation queries the response was YES. [2021-11-09 08:57:23,685 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2343 conditions, 773 events. 219/773 cut-off events. For 1452/1459 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 4784 event pairs, 94 based on Foata normal form. 3/766 useless extension candidates. Maximal degree in co-relation 2319. Up to 308 conditions per place. [2021-11-09 08:57:23,691 INFO L132 encePairwiseOnDemand]: 66/79 looper letters, 50 selfloop transitions, 22 changer transitions 4/127 dead transitions. [2021-11-09 08:57:23,691 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 127 transitions, 885 flow [2021-11-09 08:57:23,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-09 08:57:23,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-11-09 08:57:23,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 750 transitions. [2021-11-09 08:57:23,695 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7911392405063291 [2021-11-09 08:57:23,695 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 750 transitions. [2021-11-09 08:57:23,696 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 750 transitions. [2021-11-09 08:57:23,696 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 08:57:23,697 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 750 transitions. [2021-11-09 08:57:23,700 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 62.5) internal successors, (750), 12 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:23,703 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 79.0) internal successors, (1027), 13 states have internal predecessors, (1027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:23,704 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 79.0) internal successors, (1027), 13 states have internal predecessors, (1027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:23,704 INFO L186 Difference]: Start difference. First operand has 105 places, 90 transitions, 494 flow. Second operand 12 states and 750 transitions. [2021-11-09 08:57:23,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 127 transitions, 885 flow [2021-11-09 08:57:23,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 127 transitions, 875 flow, removed 4 selfloop flow, removed 3 redundant places. [2021-11-09 08:57:23,719 INFO L242 Difference]: Finished difference. Result has 117 places, 98 transitions, 623 flow [2021-11-09 08:57:23,719 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=484, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=623, PETRI_PLACES=117, PETRI_TRANSITIONS=98} [2021-11-09 08:57:23,720 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 47 predicate places. [2021-11-09 08:57:23,720 INFO L470 AbstractCegarLoop]: Abstraction has has 117 places, 98 transitions, 623 flow [2021-11-09 08:57:23,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 60.36363636363637) internal successors, (664), 11 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:23,721 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 08:57:23,721 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2021-11-09 08:57:23,762 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c571e0-6258-4e63-bef7-a3e5019b9b4f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-09 08:57:23,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c571e0-6258-4e63-bef7-a3e5019b9b4f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-09 08:57:23,934 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 08:57:23,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:57:23,935 INFO L85 PathProgramCache]: Analyzing trace with hash -1962874908, now seen corresponding path program 3 times [2021-11-09 08:57:23,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:57:23,935 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79210706] [2021-11-09 08:57:23,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:57:23,935 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:57:23,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:57:24,145 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:57:24,146 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:57:24,146 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79210706] [2021-11-09 08:57:24,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79210706] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:57:24,146 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379720981] [2021-11-09 08:57:24,147 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 08:57:24,147 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:57:24,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c571e0-6258-4e63-bef7-a3e5019b9b4f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:57:24,148 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c571e0-6258-4e63-bef7-a3e5019b9b4f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:57:24,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c571e0-6258-4e63-bef7-a3e5019b9b4f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-09 08:57:24,368 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-09 08:57:24,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:57:24,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-09 08:57:24,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:57:24,751 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:57:24,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379720981] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:57:24,752 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:57:24,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-11-09 08:57:24,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414340597] [2021-11-09 08:57:24,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-09 08:57:24,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:57:24,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-09 08:57:24,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-11-09 08:57:24,756 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 79 [2021-11-09 08:57:24,757 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 98 transitions, 623 flow. Second operand has 11 states, 11 states have (on average 60.36363636363637) internal successors, (664), 11 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:24,757 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 08:57:24,757 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 79 [2021-11-09 08:57:24,757 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 08:57:25,389 INFO L129 PetriNetUnfolder]: 380/1142 cut-off events. [2021-11-09 08:57:25,390 INFO L130 PetriNetUnfolder]: For 3114/3116 co-relation queries the response was YES. [2021-11-09 08:57:25,398 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4011 conditions, 1142 events. 380/1142 cut-off events. For 3114/3116 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 7526 event pairs, 27 based on Foata normal form. 15/1147 useless extension candidates. Maximal degree in co-relation 3982. Up to 262 conditions per place. [2021-11-09 08:57:25,408 INFO L132 encePairwiseOnDemand]: 68/79 looper letters, 118 selfloop transitions, 41 changer transitions 2/212 dead transitions. [2021-11-09 08:57:25,409 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 212 transitions, 1742 flow [2021-11-09 08:57:25,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-09 08:57:25,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-11-09 08:57:25,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1339 transitions. [2021-11-09 08:57:25,414 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8071127185051236 [2021-11-09 08:57:25,414 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1339 transitions. [2021-11-09 08:57:25,414 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1339 transitions. [2021-11-09 08:57:25,416 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 08:57:25,416 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1339 transitions. [2021-11-09 08:57:25,420 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 63.76190476190476) internal successors, (1339), 21 states have internal predecessors, (1339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:25,424 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 79.0) internal successors, (1738), 22 states have internal predecessors, (1738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:25,425 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 79.0) internal successors, (1738), 22 states have internal predecessors, (1738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:25,425 INFO L186 Difference]: Start difference. First operand has 117 places, 98 transitions, 623 flow. Second operand 21 states and 1339 transitions. [2021-11-09 08:57:25,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 212 transitions, 1742 flow [2021-11-09 08:57:25,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 212 transitions, 1631 flow, removed 30 selfloop flow, removed 6 redundant places. [2021-11-09 08:57:25,448 INFO L242 Difference]: Finished difference. Result has 144 places, 127 transitions, 959 flow [2021-11-09 08:57:25,448 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=565, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=959, PETRI_PLACES=144, PETRI_TRANSITIONS=127} [2021-11-09 08:57:25,449 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 74 predicate places. [2021-11-09 08:57:25,449 INFO L470 AbstractCegarLoop]: Abstraction has has 144 places, 127 transitions, 959 flow [2021-11-09 08:57:25,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 60.36363636363637) internal successors, (664), 11 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:25,450 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 08:57:25,450 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2021-11-09 08:57:25,486 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c571e0-6258-4e63-bef7-a3e5019b9b4f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-09 08:57:25,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c571e0-6258-4e63-bef7-a3e5019b9b4f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-09 08:57:25,666 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 08:57:25,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:57:25,667 INFO L85 PathProgramCache]: Analyzing trace with hash 2095743822, now seen corresponding path program 4 times [2021-11-09 08:57:25,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:57:25,667 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561877280] [2021-11-09 08:57:25,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:57:25,667 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:57:25,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:57:25,816 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:57:25,816 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:57:25,816 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561877280] [2021-11-09 08:57:25,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561877280] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:57:25,817 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442103036] [2021-11-09 08:57:25,817 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 08:57:25,817 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:57:25,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c571e0-6258-4e63-bef7-a3e5019b9b4f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:57:25,818 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c571e0-6258-4e63-bef7-a3e5019b9b4f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:57:25,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c571e0-6258-4e63-bef7-a3e5019b9b4f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-09 08:57:26,012 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 08:57:26,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:57:26,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-09 08:57:26,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:57:26,337 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:57:26,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442103036] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:57:26,337 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:57:26,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-11-09 08:57:26,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585115290] [2021-11-09 08:57:26,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-09 08:57:26,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:57:26,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-09 08:57:26,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-11-09 08:57:26,341 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 79 [2021-11-09 08:57:26,342 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 127 transitions, 959 flow. Second operand has 12 states, 12 states have (on average 60.333333333333336) internal successors, (724), 12 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:26,342 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 08:57:26,343 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 79 [2021-11-09 08:57:26,343 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 08:57:27,213 INFO L129 PetriNetUnfolder]: 503/1517 cut-off events. [2021-11-09 08:57:27,214 INFO L130 PetriNetUnfolder]: For 8572/8576 co-relation queries the response was YES. [2021-11-09 08:57:27,229 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6705 conditions, 1517 events. 503/1517 cut-off events. For 8572/8576 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 10904 event pairs, 64 based on Foata normal form. 17/1522 useless extension candidates. Maximal degree in co-relation 6662. Up to 490 conditions per place. [2021-11-09 08:57:27,244 INFO L132 encePairwiseOnDemand]: 67/79 looper letters, 136 selfloop transitions, 59 changer transitions 1/247 dead transitions. [2021-11-09 08:57:27,245 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 247 transitions, 2517 flow [2021-11-09 08:57:27,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-09 08:57:27,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-11-09 08:57:27,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1584 transitions. [2021-11-09 08:57:27,251 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8020253164556962 [2021-11-09 08:57:27,251 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1584 transitions. [2021-11-09 08:57:27,251 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1584 transitions. [2021-11-09 08:57:27,252 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 08:57:27,253 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1584 transitions. [2021-11-09 08:57:27,257 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 63.36) internal successors, (1584), 25 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:27,263 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 79.0) internal successors, (2054), 26 states have internal predecessors, (2054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:27,264 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 79.0) internal successors, (2054), 26 states have internal predecessors, (2054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:27,264 INFO L186 Difference]: Start difference. First operand has 144 places, 127 transitions, 959 flow. Second operand 25 states and 1584 transitions. [2021-11-09 08:57:27,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 247 transitions, 2517 flow [2021-11-09 08:57:27,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 247 transitions, 2361 flow, removed 64 selfloop flow, removed 2 redundant places. [2021-11-09 08:57:27,323 INFO L242 Difference]: Finished difference. Result has 180 places, 165 transitions, 1472 flow [2021-11-09 08:57:27,324 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=859, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=1472, PETRI_PLACES=180, PETRI_TRANSITIONS=165} [2021-11-09 08:57:27,324 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 110 predicate places. [2021-11-09 08:57:27,324 INFO L470 AbstractCegarLoop]: Abstraction has has 180 places, 165 transitions, 1472 flow [2021-11-09 08:57:27,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 60.333333333333336) internal successors, (724), 12 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:27,325 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 08:57:27,325 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2021-11-09 08:57:27,363 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c571e0-6258-4e63-bef7-a3e5019b9b4f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-09 08:57:27,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c571e0-6258-4e63-bef7-a3e5019b9b4f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:57:27,543 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 08:57:27,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:57:27,544 INFO L85 PathProgramCache]: Analyzing trace with hash 935944448, now seen corresponding path program 5 times [2021-11-09 08:57:27,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:57:27,544 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29706623] [2021-11-09 08:57:27,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:57:27,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:57:27,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:57:27,716 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:57:27,717 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:57:27,717 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29706623] [2021-11-09 08:57:27,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29706623] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:57:27,717 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265496061] [2021-11-09 08:57:27,717 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 08:57:27,718 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:57:27,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c571e0-6258-4e63-bef7-a3e5019b9b4f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:57:27,719 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c571e0-6258-4e63-bef7-a3e5019b9b4f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:57:27,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c571e0-6258-4e63-bef7-a3e5019b9b4f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-09 08:57:27,951 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-09 08:57:27,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:57:27,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-09 08:57:27,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:57:28,402 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:57:28,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265496061] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:57:28,403 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:57:28,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-11-09 08:57:28,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262421122] [2021-11-09 08:57:28,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-09 08:57:28,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:57:28,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-09 08:57:28,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-11-09 08:57:28,407 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 79 [2021-11-09 08:57:28,409 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 165 transitions, 1472 flow. Second operand has 16 states, 16 states have (on average 60.0) internal successors, (960), 16 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:28,410 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 08:57:28,410 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 79 [2021-11-09 08:57:28,410 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 08:57:30,254 INFO L129 PetriNetUnfolder]: 643/1940 cut-off events. [2021-11-09 08:57:30,255 INFO L130 PetriNetUnfolder]: For 16221/16226 co-relation queries the response was YES. [2021-11-09 08:57:30,277 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9567 conditions, 1940 events. 643/1940 cut-off events. For 16221/16226 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 14636 event pairs, 11 based on Foata normal form. 15/1947 useless extension candidates. Maximal degree in co-relation 9511. Up to 250 conditions per place. [2021-11-09 08:57:30,297 INFO L132 encePairwiseOnDemand]: 65/79 looper letters, 96 selfloop transitions, 229 changer transitions 3/379 dead transitions. [2021-11-09 08:57:30,297 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 379 transitions, 4761 flow [2021-11-09 08:57:30,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-11-09 08:57:30,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2021-11-09 08:57:30,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 2662 transitions. [2021-11-09 08:57:30,306 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7836326170150133 [2021-11-09 08:57:30,307 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 2662 transitions. [2021-11-09 08:57:30,307 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 2662 transitions. [2021-11-09 08:57:30,310 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 08:57:30,310 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 2662 transitions. [2021-11-09 08:57:30,322 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 61.906976744186046) internal successors, (2662), 43 states have internal predecessors, (2662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:30,332 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 79.0) internal successors, (3476), 44 states have internal predecessors, (3476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:30,335 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 79.0) internal successors, (3476), 44 states have internal predecessors, (3476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:30,335 INFO L186 Difference]: Start difference. First operand has 180 places, 165 transitions, 1472 flow. Second operand 43 states and 2662 transitions. [2021-11-09 08:57:30,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 379 transitions, 4761 flow [2021-11-09 08:57:30,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 379 transitions, 4391 flow, removed 168 selfloop flow, removed 3 redundant places. [2021-11-09 08:57:30,425 INFO L242 Difference]: Finished difference. Result has 237 places, 304 transitions, 3588 flow [2021-11-09 08:57:30,426 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=1290, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=3588, PETRI_PLACES=237, PETRI_TRANSITIONS=304} [2021-11-09 08:57:30,426 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 167 predicate places. [2021-11-09 08:57:30,426 INFO L470 AbstractCegarLoop]: Abstraction has has 237 places, 304 transitions, 3588 flow [2021-11-09 08:57:30,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 60.0) internal successors, (960), 16 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:30,427 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 08:57:30,427 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2021-11-09 08:57:30,463 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c571e0-6258-4e63-bef7-a3e5019b9b4f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-11-09 08:57:30,642 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c571e0-6258-4e63-bef7-a3e5019b9b4f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:57:30,642 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 08:57:30,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:57:30,643 INFO L85 PathProgramCache]: Analyzing trace with hash 2050944502, now seen corresponding path program 6 times [2021-11-09 08:57:30,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:57:30,643 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686567294] [2021-11-09 08:57:30,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:57:30,643 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:57:30,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:57:30,831 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:57:30,831 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:57:30,832 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686567294] [2021-11-09 08:57:30,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686567294] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:57:30,832 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797265203] [2021-11-09 08:57:30,832 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 08:57:30,833 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:57:30,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c571e0-6258-4e63-bef7-a3e5019b9b4f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:57:30,834 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c571e0-6258-4e63-bef7-a3e5019b9b4f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:57:30,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c571e0-6258-4e63-bef7-a3e5019b9b4f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-09 08:57:31,100 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-09 08:57:31,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:57:31,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-09 08:57:31,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:57:31,365 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:57:31,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797265203] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:57:31,366 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:57:31,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-11-09 08:57:31,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086058536] [2021-11-09 08:57:31,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-09 08:57:31,367 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:57:31,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-09 08:57:31,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-11-09 08:57:31,369 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 79 [2021-11-09 08:57:31,370 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 304 transitions, 3588 flow. Second operand has 14 states, 14 states have (on average 60.285714285714285) internal successors, (844), 14 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:31,370 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 08:57:31,370 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 79 [2021-11-09 08:57:31,371 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 08:57:33,054 INFO L129 PetriNetUnfolder]: 885/2753 cut-off events. [2021-11-09 08:57:33,054 INFO L130 PetriNetUnfolder]: For 42083/42100 co-relation queries the response was YES. [2021-11-09 08:57:33,164 INFO L84 FinitePrefix]: Finished finitePrefix Result has 16607 conditions, 2753 events. 885/2753 cut-off events. For 42083/42100 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 23267 event pairs, 67 based on Foata normal form. 17/2751 useless extension candidates. Maximal degree in co-relation 16532. Up to 726 conditions per place. [2021-11-09 08:57:33,207 INFO L132 encePairwiseOnDemand]: 67/79 looper letters, 237 selfloop transitions, 256 changer transitions 2/546 dead transitions. [2021-11-09 08:57:33,207 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 546 transitions, 8098 flow [2021-11-09 08:57:33,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-09 08:57:33,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-11-09 08:57:33,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 2144 transitions. [2021-11-09 08:57:33,212 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7982129560685034 [2021-11-09 08:57:33,212 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 2144 transitions. [2021-11-09 08:57:33,213 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 2144 transitions. [2021-11-09 08:57:33,214 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 08:57:33,214 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 2144 transitions. [2021-11-09 08:57:33,219 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 63.05882352941177) internal successors, (2144), 34 states have internal predecessors, (2144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:33,225 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 79.0) internal successors, (2765), 35 states have internal predecessors, (2765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:33,227 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 79.0) internal successors, (2765), 35 states have internal predecessors, (2765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:33,228 INFO L186 Difference]: Start difference. First operand has 237 places, 304 transitions, 3588 flow. Second operand 34 states and 2144 transitions. [2021-11-09 08:57:33,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 546 transitions, 8098 flow [2021-11-09 08:57:33,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 546 transitions, 6776 flow, removed 477 selfloop flow, removed 13 redundant places. [2021-11-09 08:57:33,453 INFO L242 Difference]: Finished difference. Result has 271 places, 424 transitions, 5167 flow [2021-11-09 08:57:33,454 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=2905, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=5167, PETRI_PLACES=271, PETRI_TRANSITIONS=424} [2021-11-09 08:57:33,454 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 201 predicate places. [2021-11-09 08:57:33,454 INFO L470 AbstractCegarLoop]: Abstraction has has 271 places, 424 transitions, 5167 flow [2021-11-09 08:57:33,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 60.285714285714285) internal successors, (844), 14 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:33,455 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 08:57:33,456 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2021-11-09 08:57:33,498 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c571e0-6258-4e63-bef7-a3e5019b9b4f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-09 08:57:33,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c571e0-6258-4e63-bef7-a3e5019b9b4f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:57:33,670 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 08:57:33,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:57:33,671 INFO L85 PathProgramCache]: Analyzing trace with hash -309083200, now seen corresponding path program 7 times [2021-11-09 08:57:33,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:57:33,671 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995338403] [2021-11-09 08:57:33,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:57:33,671 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:57:33,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:57:33,962 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:57:33,962 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:57:33,963 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995338403] [2021-11-09 08:57:33,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995338403] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:57:33,963 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9509807] [2021-11-09 08:57:33,963 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 08:57:33,963 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:57:33,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c571e0-6258-4e63-bef7-a3e5019b9b4f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:57:33,965 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c571e0-6258-4e63-bef7-a3e5019b9b4f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:57:33,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c571e0-6258-4e63-bef7-a3e5019b9b4f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-09 08:57:34,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:57:34,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-09 08:57:34,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:57:34,650 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:57:34,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9509807] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:57:34,651 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:57:34,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-11-09 08:57:34,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424174868] [2021-11-09 08:57:34,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-09 08:57:34,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:57:34,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-09 08:57:34,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-09 08:57:34,655 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 79 [2021-11-09 08:57:34,657 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 424 transitions, 5167 flow. Second operand has 13 states, 13 states have (on average 60.46153846153846) internal successors, (786), 13 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:34,657 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 08:57:34,657 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 79 [2021-11-09 08:57:34,657 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 08:57:36,514 INFO L129 PetriNetUnfolder]: 985/3082 cut-off events. [2021-11-09 08:57:36,514 INFO L130 PetriNetUnfolder]: For 44271/44280 co-relation queries the response was YES. [2021-11-09 08:57:36,587 INFO L84 FinitePrefix]: Finished finitePrefix Result has 17879 conditions, 3082 events. 985/3082 cut-off events. For 44271/44280 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 26615 event pairs, 73 based on Foata normal form. 13/3073 useless extension candidates. Maximal degree in co-relation 17794. Up to 1245 conditions per place. [2021-11-09 08:57:36,638 INFO L132 encePairwiseOnDemand]: 67/79 looper letters, 354 selfloop transitions, 149 changer transitions 3/557 dead transitions. [2021-11-09 08:57:36,639 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 557 transitions, 7884 flow [2021-11-09 08:57:36,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-09 08:57:36,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-11-09 08:57:36,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1822 transitions. [2021-11-09 08:57:36,648 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7952859013531209 [2021-11-09 08:57:36,648 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1822 transitions. [2021-11-09 08:57:36,648 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1822 transitions. [2021-11-09 08:57:36,650 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 08:57:36,650 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1822 transitions. [2021-11-09 08:57:36,656 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 62.827586206896555) internal successors, (1822), 29 states have internal predecessors, (1822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:36,662 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 79.0) internal successors, (2370), 30 states have internal predecessors, (2370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:36,664 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 79.0) internal successors, (2370), 30 states have internal predecessors, (2370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:36,664 INFO L186 Difference]: Start difference. First operand has 271 places, 424 transitions, 5167 flow. Second operand 29 states and 1822 transitions. [2021-11-09 08:57:36,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 557 transitions, 7884 flow [2021-11-09 08:57:36,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 557 transitions, 7525 flow, removed 153 selfloop flow, removed 6 redundant places. [2021-11-09 08:57:37,003 INFO L242 Difference]: Finished difference. Result has 304 places, 463 transitions, 5857 flow [2021-11-09 08:57:37,005 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=4937, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=5857, PETRI_PLACES=304, PETRI_TRANSITIONS=463} [2021-11-09 08:57:37,005 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 234 predicate places. [2021-11-09 08:57:37,005 INFO L470 AbstractCegarLoop]: Abstraction has has 304 places, 463 transitions, 5857 flow [2021-11-09 08:57:37,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 60.46153846153846) internal successors, (786), 13 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:37,006 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 08:57:37,007 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2021-11-09 08:57:37,049 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c571e0-6258-4e63-bef7-a3e5019b9b4f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-11-09 08:57:37,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c571e0-6258-4e63-bef7-a3e5019b9b4f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:57:37,222 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 08:57:37,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:57:37,223 INFO L85 PathProgramCache]: Analyzing trace with hash 1148952046, now seen corresponding path program 8 times [2021-11-09 08:57:37,223 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:57:37,223 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214130916] [2021-11-09 08:57:37,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:57:37,224 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:57:37,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:57:37,432 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:57:37,432 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:57:37,432 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214130916] [2021-11-09 08:57:37,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214130916] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:57:37,433 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672915724] [2021-11-09 08:57:37,433 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:57:37,433 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:57:37,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c571e0-6258-4e63-bef7-a3e5019b9b4f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:57:37,439 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c571e0-6258-4e63-bef7-a3e5019b9b4f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:57:37,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c571e0-6258-4e63-bef7-a3e5019b9b4f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-09 08:57:37,751 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:57:37,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:57:37,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-09 08:57:37,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:57:38,088 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:57:38,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672915724] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:57:38,089 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:57:38,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-11-09 08:57:38,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494476695] [2021-11-09 08:57:38,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-09 08:57:38,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:57:38,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-09 08:57:38,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-09 08:57:38,093 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 79 [2021-11-09 08:57:38,094 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 463 transitions, 5857 flow. Second operand has 12 states, 12 states have (on average 60.25) internal successors, (723), 12 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:38,095 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 08:57:38,095 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 79 [2021-11-09 08:57:38,095 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 08:57:39,544 INFO L129 PetriNetUnfolder]: 992/3205 cut-off events. [2021-11-09 08:57:39,545 INFO L130 PetriNetUnfolder]: For 39254/39271 co-relation queries the response was YES. [2021-11-09 08:57:39,610 INFO L84 FinitePrefix]: Finished finitePrefix Result has 17952 conditions, 3205 events. 992/3205 cut-off events. For 39254/39271 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 28356 event pairs, 171 based on Foata normal form. 9/3187 useless extension candidates. Maximal degree in co-relation 17855. Up to 1547 conditions per place. [2021-11-09 08:57:39,640 INFO L132 encePairwiseOnDemand]: 66/79 looper letters, 370 selfloop transitions, 84 changer transitions 3/508 dead transitions. [2021-11-09 08:57:39,640 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 508 transitions, 7380 flow [2021-11-09 08:57:39,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-09 08:57:39,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-11-09 08:57:39,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1114 transitions. [2021-11-09 08:57:39,644 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7834036568213784 [2021-11-09 08:57:39,644 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1114 transitions. [2021-11-09 08:57:39,644 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1114 transitions. [2021-11-09 08:57:39,645 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 08:57:39,645 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1114 transitions. [2021-11-09 08:57:39,729 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 61.888888888888886) internal successors, (1114), 18 states have internal predecessors, (1114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:39,732 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 79.0) internal successors, (1501), 19 states have internal predecessors, (1501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:39,733 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 79.0) internal successors, (1501), 19 states have internal predecessors, (1501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:39,734 INFO L186 Difference]: Start difference. First operand has 304 places, 463 transitions, 5857 flow. Second operand 18 states and 1114 transitions. [2021-11-09 08:57:39,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 508 transitions, 7380 flow [2021-11-09 08:57:39,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 508 transitions, 7135 flow, removed 74 selfloop flow, removed 8 redundant places. [2021-11-09 08:57:39,987 INFO L242 Difference]: Finished difference. Result has 317 places, 482 transitions, 6041 flow [2021-11-09 08:57:39,988 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=5624, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=6041, PETRI_PLACES=317, PETRI_TRANSITIONS=482} [2021-11-09 08:57:39,989 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 247 predicate places. [2021-11-09 08:57:39,989 INFO L470 AbstractCegarLoop]: Abstraction has has 317 places, 482 transitions, 6041 flow [2021-11-09 08:57:39,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 60.25) internal successors, (723), 12 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:39,989 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 08:57:39,990 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2021-11-09 08:57:40,019 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c571e0-6258-4e63-bef7-a3e5019b9b4f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-09 08:57:40,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c571e0-6258-4e63-bef7-a3e5019b9b4f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-09 08:57:40,200 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 08:57:40,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:57:40,200 INFO L85 PathProgramCache]: Analyzing trace with hash 1430868426, now seen corresponding path program 9 times [2021-11-09 08:57:40,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:57:40,201 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444519479] [2021-11-09 08:57:40,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:57:40,201 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:57:40,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:57:40,354 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:57:40,354 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:57:40,354 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444519479] [2021-11-09 08:57:40,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444519479] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:57:40,355 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361931632] [2021-11-09 08:57:40,355 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 08:57:40,355 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:57:40,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c571e0-6258-4e63-bef7-a3e5019b9b4f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:57:40,356 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c571e0-6258-4e63-bef7-a3e5019b9b4f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:57:40,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c571e0-6258-4e63-bef7-a3e5019b9b4f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-09 08:57:40,689 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-09 08:57:40,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:57:40,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-09 08:57:40,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:57:40,980 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:57:40,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361931632] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:57:40,981 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:57:40,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-11-09 08:57:40,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4833438] [2021-11-09 08:57:40,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-09 08:57:40,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:57:40,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-09 08:57:40,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-11-09 08:57:40,986 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 79 [2021-11-09 08:57:40,988 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 482 transitions, 6041 flow. Second operand has 12 states, 12 states have (on average 60.416666666666664) internal successors, (725), 12 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:40,988 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 08:57:40,988 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 79 [2021-11-09 08:57:40,988 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 08:57:43,332 INFO L129 PetriNetUnfolder]: 1109/3443 cut-off events. [2021-11-09 08:57:43,332 INFO L130 PetriNetUnfolder]: For 47090/47107 co-relation queries the response was YES. [2021-11-09 08:57:43,373 INFO L84 FinitePrefix]: Finished finitePrefix Result has 20069 conditions, 3443 events. 1109/3443 cut-off events. For 47090/47107 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 30258 event pairs, 170 based on Foata normal form. 20/3437 useless extension candidates. Maximal degree in co-relation 19969. Up to 1504 conditions per place. [2021-11-09 08:57:43,408 INFO L132 encePairwiseOnDemand]: 67/79 looper letters, 315 selfloop transitions, 258 changer transitions 1/625 dead transitions. [2021-11-09 08:57:43,408 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 625 transitions, 9214 flow [2021-11-09 08:57:43,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-09 08:57:43,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-11-09 08:57:43,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 2127 transitions. [2021-11-09 08:57:43,415 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7918838421444527 [2021-11-09 08:57:43,415 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 2127 transitions. [2021-11-09 08:57:43,415 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 2127 transitions. [2021-11-09 08:57:43,417 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 08:57:43,417 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 2127 transitions. [2021-11-09 08:57:43,423 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 62.55882352941177) internal successors, (2127), 34 states have internal predecessors, (2127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:43,430 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 79.0) internal successors, (2765), 35 states have internal predecessors, (2765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:43,431 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 79.0) internal successors, (2765), 35 states have internal predecessors, (2765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:43,431 INFO L186 Difference]: Start difference. First operand has 317 places, 482 transitions, 6041 flow. Second operand 34 states and 2127 transitions. [2021-11-09 08:57:43,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 625 transitions, 9214 flow [2021-11-09 08:57:43,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 625 transitions, 9069 flow, removed 26 selfloop flow, removed 6 redundant places. [2021-11-09 08:57:43,910 INFO L242 Difference]: Finished difference. Result has 356 places, 540 transitions, 7656 flow [2021-11-09 08:57:43,911 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=5925, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=482, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=202, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=7656, PETRI_PLACES=356, PETRI_TRANSITIONS=540} [2021-11-09 08:57:43,911 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 286 predicate places. [2021-11-09 08:57:43,912 INFO L470 AbstractCegarLoop]: Abstraction has has 356 places, 540 transitions, 7656 flow [2021-11-09 08:57:43,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 60.416666666666664) internal successors, (725), 12 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:43,912 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 08:57:43,913 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2021-11-09 08:57:43,953 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c571e0-6258-4e63-bef7-a3e5019b9b4f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-11-09 08:57:44,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c571e0-6258-4e63-bef7-a3e5019b9b4f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-09 08:57:44,132 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 08:57:44,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:57:44,132 INFO L85 PathProgramCache]: Analyzing trace with hash 223695190, now seen corresponding path program 10 times [2021-11-09 08:57:44,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:57:44,133 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453943009] [2021-11-09 08:57:44,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:57:44,133 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:57:44,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:57:44,329 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:57:44,330 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:57:44,330 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453943009] [2021-11-09 08:57:44,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453943009] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:57:44,331 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045674785] [2021-11-09 08:57:44,331 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 08:57:44,331 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:57:44,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c571e0-6258-4e63-bef7-a3e5019b9b4f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:57:44,332 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c571e0-6258-4e63-bef7-a3e5019b9b4f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:57:44,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c571e0-6258-4e63-bef7-a3e5019b9b4f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-09 08:57:44,682 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 08:57:44,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:57:44,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-09 08:57:44,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:57:44,948 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:57:44,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045674785] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:57:44,949 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:57:44,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-11-09 08:57:44,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93734494] [2021-11-09 08:57:44,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-09 08:57:44,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:57:44,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-09 08:57:44,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-09 08:57:44,954 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 79 [2021-11-09 08:57:44,966 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 540 transitions, 7656 flow. Second operand has 12 states, 12 states have (on average 60.166666666666664) internal successors, (722), 12 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) [2021-11-09 08:57:44,966 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 08:57:44,966 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 79 [2021-11-09 08:57:44,966 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 08:57:47,001 INFO L129 PetriNetUnfolder]: 1125/3585 cut-off events. [2021-11-09 08:57:47,001 INFO L130 PetriNetUnfolder]: For 58165/58177 co-relation queries the response was YES. [2021-11-09 08:57:47,047 INFO L84 FinitePrefix]: Finished finitePrefix Result has 21991 conditions, 3585 events. 1125/3585 cut-off events. For 58165/58177 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 32348 event pairs, 159 based on Foata normal form. 8/3562 useless extension candidates. Maximal degree in co-relation 21876. Up to 1580 conditions per place. [2021-11-09 08:57:47,090 INFO L132 encePairwiseOnDemand]: 66/79 looper letters, 361 selfloop transitions, 187 changer transitions 5/604 dead transitions. [2021-11-09 08:57:47,090 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 604 transitions, 9889 flow [2021-11-09 08:57:47,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-09 08:57:47,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-11-09 08:57:47,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1380 transitions. [2021-11-09 08:57:47,095 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7940161104718066 [2021-11-09 08:57:47,095 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1380 transitions. [2021-11-09 08:57:47,095 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1380 transitions. [2021-11-09 08:57:47,096 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 08:57:47,097 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1380 transitions. [2021-11-09 08:57:47,101 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 62.72727272727273) internal successors, (1380), 22 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:47,105 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 79.0) internal successors, (1817), 23 states have internal predecessors, (1817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:47,106 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 79.0) internal successors, (1817), 23 states have internal predecessors, (1817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:47,106 INFO L186 Difference]: Start difference. First operand has 356 places, 540 transitions, 7656 flow. Second operand 22 states and 1380 transitions. [2021-11-09 08:57:47,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 604 transitions, 9889 flow [2021-11-09 08:57:47,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 604 transitions, 9540 flow, removed 115 selfloop flow, removed 13 redundant places. [2021-11-09 08:57:47,718 INFO L242 Difference]: Finished difference. Result has 368 places, 551 transitions, 7929 flow [2021-11-09 08:57:47,719 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=7308, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=540, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=360, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=7929, PETRI_PLACES=368, PETRI_TRANSITIONS=551} [2021-11-09 08:57:47,720 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 298 predicate places. [2021-11-09 08:57:47,720 INFO L470 AbstractCegarLoop]: Abstraction has has 368 places, 551 transitions, 7929 flow [2021-11-09 08:57:47,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 60.166666666666664) internal successors, (722), 12 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) [2021-11-09 08:57:47,721 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 08:57:47,721 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2021-11-09 08:57:47,766 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c571e0-6258-4e63-bef7-a3e5019b9b4f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-09 08:57:47,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c571e0-6258-4e63-bef7-a3e5019b9b4f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-09 08:57:47,950 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 08:57:47,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:57:47,951 INFO L85 PathProgramCache]: Analyzing trace with hash 1130966784, now seen corresponding path program 11 times [2021-11-09 08:57:47,951 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:57:47,951 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659499178] [2021-11-09 08:57:47,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:57:47,951 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:57:47,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:57:48,129 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:57:48,130 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:57:48,130 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659499178] [2021-11-09 08:57:48,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659499178] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:57:48,130 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350440257] [2021-11-09 08:57:48,130 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 08:57:48,130 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:57:48,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c571e0-6258-4e63-bef7-a3e5019b9b4f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:57:48,132 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c571e0-6258-4e63-bef7-a3e5019b9b4f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:57:48,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c571e0-6258-4e63-bef7-a3e5019b9b4f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-09 08:57:48,610 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:57:48,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:57:48,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-09 08:57:48,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:57:49,016 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:57:49,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350440257] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:57:49,017 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:57:49,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-11-09 08:57:49,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551619144] [2021-11-09 08:57:49,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-09 08:57:49,019 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:57:49,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-09 08:57:49,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-11-09 08:57:49,026 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 79 [2021-11-09 08:57:49,027 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 551 transitions, 7929 flow. Second operand has 14 states, 14 states have (on average 60.142857142857146) internal successors, (842), 14 states have internal predecessors, (842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:49,028 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 08:57:49,028 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 79 [2021-11-09 08:57:49,028 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 08:57:52,110 INFO L129 PetriNetUnfolder]: 1560/4756 cut-off events. [2021-11-09 08:57:52,111 INFO L130 PetriNetUnfolder]: For 74526/74540 co-relation queries the response was YES. [2021-11-09 08:57:52,172 INFO L84 FinitePrefix]: Finished finitePrefix Result has 29602 conditions, 4756 events. 1560/4756 cut-off events. For 74526/74540 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 45276 event pairs, 83 based on Foata normal form. 22/4746 useless extension candidates. Maximal degree in co-relation 29482. Up to 813 conditions per place. [2021-11-09 08:57:52,214 INFO L132 encePairwiseOnDemand]: 68/79 looper letters, 455 selfloop transitions, 456 changer transitions 2/964 dead transitions. [2021-11-09 08:57:52,215 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 964 transitions, 16867 flow [2021-11-09 08:57:52,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-09 08:57:52,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-11-09 08:57:52,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2440 transitions. [2021-11-09 08:57:52,221 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7919506653683869 [2021-11-09 08:57:52,222 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2440 transitions. [2021-11-09 08:57:52,222 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2440 transitions. [2021-11-09 08:57:52,224 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 08:57:52,224 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2440 transitions. [2021-11-09 08:57:52,230 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 62.56410256410256) internal successors, (2440), 39 states have internal predecessors, (2440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:52,237 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 79.0) internal successors, (3160), 40 states have internal predecessors, (3160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:52,238 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 79.0) internal successors, (3160), 40 states have internal predecessors, (3160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:52,239 INFO L186 Difference]: Start difference. First operand has 368 places, 551 transitions, 7929 flow. Second operand 39 states and 2440 transitions. [2021-11-09 08:57:52,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 964 transitions, 16867 flow [2021-11-09 08:57:52,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 964 transitions, 16458 flow, removed 100 selfloop flow, removed 11 redundant places. [2021-11-09 08:57:52,825 INFO L242 Difference]: Finished difference. Result has 410 places, 799 transitions, 13391 flow [2021-11-09 08:57:52,826 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=7695, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=551, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=214, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=13391, PETRI_PLACES=410, PETRI_TRANSITIONS=799} [2021-11-09 08:57:52,827 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 340 predicate places. [2021-11-09 08:57:52,827 INFO L470 AbstractCegarLoop]: Abstraction has has 410 places, 799 transitions, 13391 flow [2021-11-09 08:57:52,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 60.142857142857146) internal successors, (842), 14 states have internal predecessors, (842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:52,828 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 08:57:52,828 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2021-11-09 08:57:52,859 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c571e0-6258-4e63-bef7-a3e5019b9b4f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-11-09 08:57:53,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c571e0-6258-4e63-bef7-a3e5019b9b4f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-09 08:57:53,054 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 08:57:53,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:57:53,055 INFO L85 PathProgramCache]: Analyzing trace with hash 2012727464, now seen corresponding path program 12 times [2021-11-09 08:57:53,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:57:53,055 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619545135] [2021-11-09 08:57:53,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:57:53,055 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:57:53,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:57:53,221 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:57:53,222 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:57:53,222 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619545135] [2021-11-09 08:57:53,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619545135] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:57:53,222 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116994425] [2021-11-09 08:57:53,222 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 08:57:53,222 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:57:53,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c571e0-6258-4e63-bef7-a3e5019b9b4f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:57:53,226 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c571e0-6258-4e63-bef7-a3e5019b9b4f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:57:53,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c571e0-6258-4e63-bef7-a3e5019b9b4f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-09 08:57:53,747 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-11-09 08:57:53,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:57:53,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-09 08:57:53,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:57:54,130 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:57:54,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116994425] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:57:54,130 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:57:54,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-11-09 08:57:54,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923037123] [2021-11-09 08:57:54,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-09 08:57:54,131 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:57:54,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-09 08:57:54,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-09 08:57:54,133 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 79 [2021-11-09 08:57:54,134 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 799 transitions, 13391 flow. Second operand has 12 states, 12 states have (on average 60.5) internal successors, (726), 12 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:54,134 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 08:57:54,134 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 79 [2021-11-09 08:57:54,134 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 08:57:57,046 INFO L129 PetriNetUnfolder]: 1667/5095 cut-off events. [2021-11-09 08:57:57,046 INFO L130 PetriNetUnfolder]: For 88805/88818 co-relation queries the response was YES. [2021-11-09 08:57:57,315 INFO L84 FinitePrefix]: Finished finitePrefix Result has 33977 conditions, 5095 events. 1667/5095 cut-off events. For 88805/88818 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 49145 event pairs, 295 based on Foata normal form. 24/5078 useless extension candidates. Maximal degree in co-relation 33840. Up to 2170 conditions per place. [2021-11-09 08:57:57,363 INFO L132 encePairwiseOnDemand]: 67/79 looper letters, 480 selfloop transitions, 400 changer transitions 2/933 dead transitions. [2021-11-09 08:57:57,364 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 933 transitions, 17159 flow [2021-11-09 08:57:57,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-09 08:57:57,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-11-09 08:57:57,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1999 transitions. [2021-11-09 08:57:57,370 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.790743670886076 [2021-11-09 08:57:57,370 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1999 transitions. [2021-11-09 08:57:57,370 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1999 transitions. [2021-11-09 08:57:57,371 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 08:57:57,372 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1999 transitions. [2021-11-09 08:57:57,376 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 62.46875) internal successors, (1999), 32 states have internal predecessors, (1999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:57,382 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 79.0) internal successors, (2607), 33 states have internal predecessors, (2607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:57,383 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 79.0) internal successors, (2607), 33 states have internal predecessors, (2607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:57,384 INFO L186 Difference]: Start difference. First operand has 410 places, 799 transitions, 13391 flow. Second operand 32 states and 1999 transitions. [2021-11-09 08:57:57,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 933 transitions, 17159 flow [2021-11-09 08:57:58,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 933 transitions, 16587 flow, removed 103 selfloop flow, removed 7 redundant places. [2021-11-09 08:57:58,319 INFO L242 Difference]: Finished difference. Result has 439 places, 820 transitions, 14075 flow [2021-11-09 08:57:58,321 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=12825, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=798, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=378, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=14075, PETRI_PLACES=439, PETRI_TRANSITIONS=820} [2021-11-09 08:57:58,321 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 369 predicate places. [2021-11-09 08:57:58,321 INFO L470 AbstractCegarLoop]: Abstraction has has 439 places, 820 transitions, 14075 flow [2021-11-09 08:57:58,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 60.5) internal successors, (726), 12 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:58,322 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 08:57:58,322 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2021-11-09 08:57:58,364 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c571e0-6258-4e63-bef7-a3e5019b9b4f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-09 08:57:58,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c571e0-6258-4e63-bef7-a3e5019b9b4f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:57:58,550 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 08:57:58,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:57:58,551 INFO L85 PathProgramCache]: Analyzing trace with hash -300136418, now seen corresponding path program 13 times [2021-11-09 08:57:58,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:57:58,551 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313134319] [2021-11-09 08:57:58,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:57:58,552 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:57:58,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:57:58,710 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:57:58,710 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:57:58,711 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313134319] [2021-11-09 08:57:58,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313134319] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:57:58,711 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687099218] [2021-11-09 08:57:58,711 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 08:57:58,712 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:57:58,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c571e0-6258-4e63-bef7-a3e5019b9b4f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:57:58,713 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c571e0-6258-4e63-bef7-a3e5019b9b4f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:57:58,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c571e0-6258-4e63-bef7-a3e5019b9b4f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-09 08:57:59,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:57:59,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-09 08:57:59,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:57:59,388 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:57:59,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687099218] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:57:59,388 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:57:59,389 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-11-09 08:57:59,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786579183] [2021-11-09 08:57:59,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-09 08:57:59,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:57:59,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-09 08:57:59,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-11-09 08:57:59,391 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 79 [2021-11-09 08:57:59,392 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 820 transitions, 14075 flow. Second operand has 11 states, 11 states have (on average 60.45454545454545) internal successors, (665), 11 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:59,392 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 08:57:59,393 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 79 [2021-11-09 08:57:59,393 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 08:58:02,782 INFO L129 PetriNetUnfolder]: 1900/5781 cut-off events. [2021-11-09 08:58:02,782 INFO L130 PetriNetUnfolder]: For 113356/113374 co-relation queries the response was YES. [2021-11-09 08:58:02,905 INFO L84 FinitePrefix]: Finished finitePrefix Result has 39986 conditions, 5781 events. 1900/5781 cut-off events. For 113356/113374 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 57385 event pairs, 348 based on Foata normal form. 22/5753 useless extension candidates. Maximal degree in co-relation 39844. Up to 3309 conditions per place. [2021-11-09 08:58:02,945 INFO L132 encePairwiseOnDemand]: 67/79 looper letters, 783 selfloop transitions, 166 changer transitions 2/1002 dead transitions. [2021-11-09 08:58:02,945 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 465 places, 1002 transitions, 19224 flow [2021-11-09 08:58:02,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-09 08:58:02,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-11-09 08:58:02,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1735 transitions. [2021-11-09 08:58:02,953 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7843580470162749 [2021-11-09 08:58:02,953 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1735 transitions. [2021-11-09 08:58:02,953 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1735 transitions. [2021-11-09 08:58:02,954 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 08:58:02,955 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1735 transitions. [2021-11-09 08:58:02,959 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 61.964285714285715) internal successors, (1735), 28 states have internal predecessors, (1735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:02,965 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 79.0) internal successors, (2291), 29 states have internal predecessors, (2291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:02,966 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 79.0) internal successors, (2291), 29 states have internal predecessors, (2291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:02,966 INFO L186 Difference]: Start difference. First operand has 439 places, 820 transitions, 14075 flow. Second operand 28 states and 1735 transitions. [2021-11-09 08:58:02,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 465 places, 1002 transitions, 19224 flow [2021-11-09 08:58:04,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 1002 transitions, 18584 flow, removed 83 selfloop flow, removed 28 redundant places. [2021-11-09 08:58:04,146 INFO L242 Difference]: Finished difference. Result has 453 places, 897 transitions, 15756 flow [2021-11-09 08:58:04,148 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=13498, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=820, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=661, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=15756, PETRI_PLACES=453, PETRI_TRANSITIONS=897} [2021-11-09 08:58:04,148 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 383 predicate places. [2021-11-09 08:58:04,148 INFO L470 AbstractCegarLoop]: Abstraction has has 453 places, 897 transitions, 15756 flow [2021-11-09 08:58:04,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 60.45454545454545) internal successors, (665), 11 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:04,149 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 08:58:04,150 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2021-11-09 08:58:04,178 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c571e0-6258-4e63-bef7-a3e5019b9b4f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-09 08:58:04,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c571e0-6258-4e63-bef7-a3e5019b9b4f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:58:04,358 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 08:58:04,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:58:04,359 INFO L85 PathProgramCache]: Analyzing trace with hash -1672213216, now seen corresponding path program 14 times [2021-11-09 08:58:04,359 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:58:04,360 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827552658] [2021-11-09 08:58:04,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:58:04,360 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:58:04,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:58:04,513 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:58:04,513 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:58:04,514 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827552658] [2021-11-09 08:58:04,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827552658] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:58:04,514 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483778286] [2021-11-09 08:58:04,514 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:58:04,514 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:58:04,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c571e0-6258-4e63-bef7-a3e5019b9b4f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:58:04,516 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c571e0-6258-4e63-bef7-a3e5019b9b4f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:58:04,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c571e0-6258-4e63-bef7-a3e5019b9b4f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-09 08:58:05,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:58:05,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:58:05,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-09 08:58:05,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:58:05,445 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:58:05,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483778286] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:58:05,446 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:58:05,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-11-09 08:58:05,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086556830] [2021-11-09 08:58:05,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-09 08:58:05,447 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:58:05,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-09 08:58:05,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-11-09 08:58:05,449 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 79 [2021-11-09 08:58:05,450 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 453 places, 897 transitions, 15756 flow. Second operand has 12 states, 12 states have (on average 60.166666666666664) internal successors, (722), 12 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) [2021-11-09 08:58:05,450 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 08:58:05,450 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 79 [2021-11-09 08:58:05,450 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 08:58:08,629 INFO L129 PetriNetUnfolder]: 1887/5770 cut-off events. [2021-11-09 08:58:08,629 INFO L130 PetriNetUnfolder]: For 115132/115155 co-relation queries the response was YES. [2021-11-09 08:58:08,808 INFO L84 FinitePrefix]: Finished finitePrefix Result has 40117 conditions, 5770 events. 1887/5770 cut-off events. For 115132/115155 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 57418 event pairs, 268 based on Foata normal form. 11/5728 useless extension candidates. Maximal degree in co-relation 39959. Up to 2657 conditions per place. [2021-11-09 08:58:08,856 INFO L132 encePairwiseOnDemand]: 66/79 looper letters, 634 selfloop transitions, 273 changer transitions 3/961 dead transitions. [2021-11-09 08:58:08,856 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 477 places, 961 transitions, 18815 flow [2021-11-09 08:58:08,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-09 08:58:08,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-11-09 08:58:08,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1563 transitions. [2021-11-09 08:58:08,862 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7913924050632911 [2021-11-09 08:58:08,862 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1563 transitions. [2021-11-09 08:58:08,862 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1563 transitions. [2021-11-09 08:58:08,863 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 08:58:08,864 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1563 transitions. [2021-11-09 08:58:08,868 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 62.52) internal successors, (1563), 25 states have internal predecessors, (1563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:08,871 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 79.0) internal successors, (2054), 26 states have internal predecessors, (2054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:08,872 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 79.0) internal successors, (2054), 26 states have internal predecessors, (2054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:08,873 INFO L186 Difference]: Start difference. First operand has 453 places, 897 transitions, 15756 flow. Second operand 25 states and 1563 transitions. [2021-11-09 08:58:08,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 477 places, 961 transitions, 18815 flow [2021-11-09 08:58:10,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 474 places, 961 transitions, 18515 flow, removed 127 selfloop flow, removed 3 redundant places. [2021-11-09 08:58:10,113 INFO L242 Difference]: Finished difference. Result has 477 places, 899 transitions, 16117 flow [2021-11-09 08:58:10,114 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=15480, PETRI_DIFFERENCE_MINUEND_PLACES=450, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=897, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=271, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=625, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=16117, PETRI_PLACES=477, PETRI_TRANSITIONS=899} [2021-11-09 08:58:10,114 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 407 predicate places. [2021-11-09 08:58:10,114 INFO L470 AbstractCegarLoop]: Abstraction has has 477 places, 899 transitions, 16117 flow [2021-11-09 08:58:10,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 60.166666666666664) internal successors, (722), 12 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) [2021-11-09 08:58:10,115 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 08:58:10,115 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2021-11-09 08:58:10,141 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c571e0-6258-4e63-bef7-a3e5019b9b4f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-11-09 08:58:10,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c571e0-6258-4e63-bef7-a3e5019b9b4f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:58:10,315 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 08:58:10,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:58:10,316 INFO L85 PathProgramCache]: Analyzing trace with hash -1668245502, now seen corresponding path program 15 times [2021-11-09 08:58:10,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:58:10,316 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633638942] [2021-11-09 08:58:10,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:58:10,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:58:10,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:58:10,464 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:58:10,464 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:58:10,464 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633638942] [2021-11-09 08:58:10,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633638942] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:58:10,464 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900670130] [2021-11-09 08:58:10,464 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 08:58:10,465 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:58:10,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c571e0-6258-4e63-bef7-a3e5019b9b4f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:58:10,466 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c571e0-6258-4e63-bef7-a3e5019b9b4f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:58:10,490 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c571e0-6258-4e63-bef7-a3e5019b9b4f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-09 08:58:11,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-09 08:58:11,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:58:11,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-09 08:58:11,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:58:11,451 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:58:11,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900670130] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:58:11,452 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:58:11,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-11-09 08:58:11,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679085971] [2021-11-09 08:58:11,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-09 08:58:11,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:58:11,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-09 08:58:11,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-09 08:58:11,455 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 79 [2021-11-09 08:58:11,456 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 477 places, 899 transitions, 16117 flow. Second operand has 11 states, 11 states have (on average 60.36363636363637) internal successors, (664), 11 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:11,456 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 08:58:11,456 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 79 [2021-11-09 08:58:11,456 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 08:58:14,665 INFO L129 PetriNetUnfolder]: 1893/5781 cut-off events. [2021-11-09 08:58:14,665 INFO L130 PetriNetUnfolder]: For 114370/114392 co-relation queries the response was YES. [2021-11-09 08:58:14,857 INFO L84 FinitePrefix]: Finished finitePrefix Result has 40143 conditions, 5781 events. 1893/5781 cut-off events. For 114370/114392 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 57610 event pairs, 279 based on Foata normal form. 10/5738 useless extension candidates. Maximal degree in co-relation 39981. Up to 2909 conditions per place. [2021-11-09 08:58:14,895 INFO L132 encePairwiseOnDemand]: 66/79 looper letters, 745 selfloop transitions, 135 changer transitions 4/935 dead transitions. [2021-11-09 08:58:14,895 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 492 places, 935 transitions, 18708 flow [2021-11-09 08:58:14,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-09 08:58:14,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-11-09 08:58:14,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1056 transitions. [2021-11-09 08:58:14,898 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7862993298585257 [2021-11-09 08:58:14,898 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1056 transitions. [2021-11-09 08:58:14,899 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1056 transitions. [2021-11-09 08:58:14,899 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 08:58:14,899 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1056 transitions. [2021-11-09 08:58:14,902 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 62.11764705882353) internal successors, (1056), 17 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:14,904 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 79.0) internal successors, (1422), 18 states have internal predecessors, (1422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:14,905 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 79.0) internal successors, (1422), 18 states have internal predecessors, (1422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:14,905 INFO L186 Difference]: Start difference. First operand has 477 places, 899 transitions, 16117 flow. Second operand 17 states and 1056 transitions. [2021-11-09 08:58:14,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 492 places, 935 transitions, 18708 flow [2021-11-09 08:58:16,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 472 places, 935 transitions, 18268 flow, removed 26 selfloop flow, removed 20 redundant places. [2021-11-09 08:58:16,259 INFO L242 Difference]: Finished difference. Result has 473 places, 901 transitions, 16024 flow [2021-11-09 08:58:16,261 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=15690, PETRI_DIFFERENCE_MINUEND_PLACES=456, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=899, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=768, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=16024, PETRI_PLACES=473, PETRI_TRANSITIONS=901} [2021-11-09 08:58:16,261 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 403 predicate places. [2021-11-09 08:58:16,261 INFO L470 AbstractCegarLoop]: Abstraction has has 473 places, 901 transitions, 16024 flow [2021-11-09 08:58:16,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 60.36363636363637) internal successors, (664), 11 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:16,262 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 08:58:16,262 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2021-11-09 08:58:16,306 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c571e0-6258-4e63-bef7-a3e5019b9b4f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-09 08:58:16,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c571e0-6258-4e63-bef7-a3e5019b9b4f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-11-09 08:58:16,486 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 08:58:16,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:58:16,487 INFO L85 PathProgramCache]: Analyzing trace with hash 1646056656, now seen corresponding path program 16 times [2021-11-09 08:58:16,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:58:16,487 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963008699] [2021-11-09 08:58:16,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:58:16,487 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:58:16,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:58:16,654 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:58:16,654 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:58:16,654 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963008699] [2021-11-09 08:58:16,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963008699] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:58:16,654 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34983384] [2021-11-09 08:58:16,654 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 08:58:16,655 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:58:16,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c571e0-6258-4e63-bef7-a3e5019b9b4f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:58:16,662 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c571e0-6258-4e63-bef7-a3e5019b9b4f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:58:16,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c571e0-6258-4e63-bef7-a3e5019b9b4f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-09 08:58:17,293 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 08:58:17,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:58:17,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-09 08:58:17,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:58:17,606 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:58:17,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34983384] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:58:17,607 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:58:17,607 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-11-09 08:58:17,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213874142] [2021-11-09 08:58:17,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-09 08:58:17,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:58:17,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-09 08:58:17,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-11-09 08:58:17,612 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 79 [2021-11-09 08:58:17,613 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 473 places, 901 transitions, 16024 flow. Second operand has 12 states, 12 states have (on average 60.5) internal successors, (726), 12 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:17,613 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 08:58:17,614 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 79 [2021-11-09 08:58:17,614 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 08:58:21,386 INFO L129 PetriNetUnfolder]: 1996/6004 cut-off events. [2021-11-09 08:58:21,387 INFO L130 PetriNetUnfolder]: For 120003/120024 co-relation queries the response was YES. [2021-11-09 08:58:21,583 INFO L84 FinitePrefix]: Finished finitePrefix Result has 41863 conditions, 6004 events. 1996/6004 cut-off events. For 120003/120024 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 59941 event pairs, 393 based on Foata normal form. 18/5966 useless extension candidates. Maximal degree in co-relation 41699. Up to 3367 conditions per place. [2021-11-09 08:58:21,622 INFO L132 encePairwiseOnDemand]: 67/79 looper letters, 767 selfloop transitions, 208 changer transitions 1/1027 dead transitions. [2021-11-09 08:58:21,622 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 496 places, 1027 transitions, 19987 flow [2021-11-09 08:58:21,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-09 08:58:21,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-11-09 08:58:21,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1747 transitions. [2021-11-09 08:58:21,625 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7897830018083183 [2021-11-09 08:58:21,626 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1747 transitions. [2021-11-09 08:58:21,626 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1747 transitions. [2021-11-09 08:58:21,627 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 08:58:21,627 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1747 transitions. [2021-11-09 08:58:21,631 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 62.392857142857146) internal successors, (1747), 28 states have internal predecessors, (1747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:21,635 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 79.0) internal successors, (2291), 29 states have internal predecessors, (2291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:21,636 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 79.0) internal successors, (2291), 29 states have internal predecessors, (2291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:21,636 INFO L186 Difference]: Start difference. First operand has 473 places, 901 transitions, 16024 flow. Second operand 28 states and 1747 transitions. [2021-11-09 08:58:21,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 496 places, 1027 transitions, 19987 flow [2021-11-09 08:58:22,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 481 places, 1027 transitions, 19667 flow, removed 4 selfloop flow, removed 15 redundant places. [2021-11-09 08:58:23,025 INFO L242 Difference]: Finished difference. Result has 490 places, 936 transitions, 16877 flow [2021-11-09 08:58:23,027 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=15734, PETRI_DIFFERENCE_MINUEND_PLACES=454, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=901, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=178, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=698, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=16877, PETRI_PLACES=490, PETRI_TRANSITIONS=936} [2021-11-09 08:58:23,027 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 420 predicate places. [2021-11-09 08:58:23,028 INFO L470 AbstractCegarLoop]: Abstraction has has 490 places, 936 transitions, 16877 flow [2021-11-09 08:58:23,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 60.5) internal successors, (726), 12 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:23,028 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 08:58:23,028 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2021-11-09 08:58:23,054 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c571e0-6258-4e63-bef7-a3e5019b9b4f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-09 08:58:23,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c571e0-6258-4e63-bef7-a3e5019b9b4f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-09 08:58:23,231 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 08:58:23,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:58:23,232 INFO L85 PathProgramCache]: Analyzing trace with hash 61343168, now seen corresponding path program 17 times [2021-11-09 08:58:23,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:58:23,232 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379698785] [2021-11-09 08:58:23,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:58:23,232 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:58:23,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:58:23,356 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:58:23,356 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:58:23,356 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379698785] [2021-11-09 08:58:23,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379698785] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:58:23,357 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615372901] [2021-11-09 08:58:23,357 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 08:58:23,357 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:58:23,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c571e0-6258-4e63-bef7-a3e5019b9b4f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:58:23,358 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c571e0-6258-4e63-bef7-a3e5019b9b4f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:58:23,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c571e0-6258-4e63-bef7-a3e5019b9b4f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-09 08:58:23,826 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-09 08:58:23,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:58:23,827 WARN L261 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-09 08:58:23,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:58:24,331 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:58:24,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615372901] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:58:24,331 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:58:24,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-11-09 08:58:24,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261868295] [2021-11-09 08:58:24,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-09 08:58:24,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:58:24,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-09 08:58:24,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-11-09 08:58:24,334 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 79 [2021-11-09 08:58:24,336 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 490 places, 936 transitions, 16877 flow. Second operand has 16 states, 16 states have (on average 60.0) internal successors, (960), 16 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:24,336 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 08:58:24,336 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 79 [2021-11-09 08:58:24,337 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 08:58:29,477 INFO L129 PetriNetUnfolder]: 2220/6802 cut-off events. [2021-11-09 08:58:29,478 INFO L130 PetriNetUnfolder]: For 139737/139748 co-relation queries the response was YES. [2021-11-09 08:58:29,631 INFO L84 FinitePrefix]: Finished finitePrefix Result has 47271 conditions, 6802 events. 2220/6802 cut-off events. For 139737/139748 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 70231 event pairs, 199 based on Foata normal form. 17/6757 useless extension candidates. Maximal degree in co-relation 47101. Up to 1460 conditions per place. [2021-11-09 08:58:29,674 INFO L132 encePairwiseOnDemand]: 65/79 looper letters, 609 selfloop transitions, 538 changer transitions 2/1200 dead transitions. [2021-11-09 08:58:29,674 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 531 places, 1200 transitions, 24155 flow [2021-11-09 08:58:29,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-09 08:58:29,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2021-11-09 08:58:29,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 2587 transitions. [2021-11-09 08:58:29,677 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7796865581675708 [2021-11-09 08:58:29,677 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 2587 transitions. [2021-11-09 08:58:29,677 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 2587 transitions. [2021-11-09 08:58:29,681 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 08:58:29,682 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 2587 transitions. [2021-11-09 08:58:29,687 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 61.595238095238095) internal successors, (2587), 42 states have internal predecessors, (2587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:29,692 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 79.0) internal successors, (3397), 43 states have internal predecessors, (3397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:29,694 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 79.0) internal successors, (3397), 43 states have internal predecessors, (3397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:29,699 INFO L186 Difference]: Start difference. First operand has 490 places, 936 transitions, 16877 flow. Second operand 42 states and 2587 transitions. [2021-11-09 08:58:29,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 531 places, 1200 transitions, 24155 flow [2021-11-09 08:58:31,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 516 places, 1200 transitions, 23635 flow, removed 155 selfloop flow, removed 15 redundant places. [2021-11-09 08:58:31,050 INFO L242 Difference]: Finished difference. Result has 535 places, 1135 transitions, 22035 flow [2021-11-09 08:58:31,051 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=16369, PETRI_DIFFERENCE_MINUEND_PLACES=475, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=936, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=359, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=521, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=22035, PETRI_PLACES=535, PETRI_TRANSITIONS=1135} [2021-11-09 08:58:31,051 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 465 predicate places. [2021-11-09 08:58:31,051 INFO L470 AbstractCegarLoop]: Abstraction has has 535 places, 1135 transitions, 22035 flow [2021-11-09 08:58:31,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 60.0) internal successors, (960), 16 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:31,051 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 08:58:31,051 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2021-11-09 08:58:31,074 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c571e0-6258-4e63-bef7-a3e5019b9b4f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-11-09 08:58:31,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c571e0-6258-4e63-bef7-a3e5019b9b4f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-09 08:58:31,252 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 08:58:31,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:58:31,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1491302690, now seen corresponding path program 18 times [2021-11-09 08:58:31,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:58:31,253 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814016813] [2021-11-09 08:58:31,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:58:31,253 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:58:31,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:58:31,402 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:58:31,402 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:58:31,403 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814016813] [2021-11-09 08:58:31,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814016813] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:58:31,403 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447016645] [2021-11-09 08:58:31,403 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 08:58:31,403 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:58:31,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c571e0-6258-4e63-bef7-a3e5019b9b4f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:58:31,404 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c571e0-6258-4e63-bef7-a3e5019b9b4f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:58:31,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c571e0-6258-4e63-bef7-a3e5019b9b4f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-09 08:58:31,880 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-09 08:58:31,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:58:31,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-09 08:58:31,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:58:32,137 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:58:32,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447016645] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:58:32,137 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:58:32,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-11-09 08:58:32,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204955185] [2021-11-09 08:58:32,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-09 08:58:32,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:58:32,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-09 08:58:32,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-09 08:58:32,139 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 79 [2021-11-09 08:58:32,140 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 535 places, 1135 transitions, 22035 flow. Second operand has 13 states, 13 states have (on average 60.30769230769231) internal successors, (784), 13 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:32,140 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 08:58:32,140 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 79 [2021-11-09 08:58:32,141 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 08:58:36,320 INFO L129 PetriNetUnfolder]: 2310/7040 cut-off events. [2021-11-09 08:58:36,320 INFO L130 PetriNetUnfolder]: For 167416/167431 co-relation queries the response was YES. [2021-11-09 08:58:36,501 INFO L84 FinitePrefix]: Finished finitePrefix Result has 52269 conditions, 7040 events. 2310/7040 cut-off events. For 167416/167431 co-relation queries the response was YES. Maximal size of possible extension queue 458. Compared 73141 event pairs, 423 based on Foata normal form. 24/6995 useless extension candidates. Maximal degree in co-relation 52082. Up to 3207 conditions per place. [2021-11-09 08:58:36,547 INFO L132 encePairwiseOnDemand]: 67/79 looper letters, 711 selfloop transitions, 499 changer transitions 0/1261 dead transitions. [2021-11-09 08:58:36,547 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 561 places, 1261 transitions, 26615 flow [2021-11-09 08:58:36,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-09 08:58:36,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-11-09 08:58:36,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1691 transitions. [2021-11-09 08:58:36,549 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7927801218940459 [2021-11-09 08:58:36,550 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1691 transitions. [2021-11-09 08:58:36,550 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1691 transitions. [2021-11-09 08:58:36,550 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 08:58:36,551 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1691 transitions. [2021-11-09 08:58:36,554 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 62.629629629629626) internal successors, (1691), 27 states have internal predecessors, (1691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:36,557 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 79.0) internal successors, (2212), 28 states have internal predecessors, (2212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:36,558 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 79.0) internal successors, (2212), 28 states have internal predecessors, (2212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:36,558 INFO L186 Difference]: Start difference. First operand has 535 places, 1135 transitions, 22035 flow. Second operand 27 states and 1691 transitions. [2021-11-09 08:58:36,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 561 places, 1261 transitions, 26615 flow [2021-11-09 08:58:38,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 556 places, 1261 transitions, 25436 flow, removed 565 selfloop flow, removed 5 redundant places. [2021-11-09 08:58:38,954 INFO L242 Difference]: Finished difference. Result has 563 places, 1158 transitions, 22568 flow [2021-11-09 08:58:38,955 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=21038, PETRI_DIFFERENCE_MINUEND_PLACES=530, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=478, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=646, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=22568, PETRI_PLACES=563, PETRI_TRANSITIONS=1158} [2021-11-09 08:58:38,955 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 493 predicate places. [2021-11-09 08:58:38,956 INFO L470 AbstractCegarLoop]: Abstraction has has 563 places, 1158 transitions, 22568 flow [2021-11-09 08:58:38,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 60.30769230769231) internal successors, (784), 13 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:38,956 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 08:58:38,956 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2021-11-09 08:58:38,994 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c571e0-6258-4e63-bef7-a3e5019b9b4f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-09 08:58:39,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c571e0-6258-4e63-bef7-a3e5019b9b4f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-09 08:58:39,170 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 08:58:39,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:58:39,171 INFO L85 PathProgramCache]: Analyzing trace with hash -1611872492, now seen corresponding path program 19 times [2021-11-09 08:58:39,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:58:39,171 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156978047] [2021-11-09 08:58:39,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:58:39,171 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:58:39,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:58:39,325 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:58:39,325 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:58:39,325 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156978047] [2021-11-09 08:58:39,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156978047] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:58:39,325 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187917773] [2021-11-09 08:58:39,325 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 08:58:39,326 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:58:39,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c571e0-6258-4e63-bef7-a3e5019b9b4f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:58:39,327 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c571e0-6258-4e63-bef7-a3e5019b9b4f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:58:39,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c571e0-6258-4e63-bef7-a3e5019b9b4f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-09 08:58:39,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:58:39,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-09 08:58:39,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:58:40,136 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:58:40,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187917773] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:58:40,136 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:58:40,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-11-09 08:58:40,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613731499] [2021-11-09 08:58:40,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-09 08:58:40,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:58:40,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-09 08:58:40,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-11-09 08:58:40,138 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 79 [2021-11-09 08:58:40,139 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 563 places, 1158 transitions, 22568 flow. Second operand has 12 states, 12 states have (on average 60.5) internal successors, (726), 12 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:40,139 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 08:58:40,139 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 79 [2021-11-09 08:58:40,140 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 08:58:45,433 INFO L129 PetriNetUnfolder]: 2397/7323 cut-off events. [2021-11-09 08:58:45,433 INFO L130 PetriNetUnfolder]: For 180690/180701 co-relation queries the response was YES. [2021-11-09 08:58:45,791 INFO L84 FinitePrefix]: Finished finitePrefix Result has 54792 conditions, 7323 events. 2397/7323 cut-off events. For 180690/180701 co-relation queries the response was YES. Maximal size of possible extension queue 467. Compared 76694 event pairs, 448 based on Foata normal form. 24/7278 useless extension candidates. Maximal degree in co-relation 54598. Up to 3439 conditions per place. [2021-11-09 08:58:45,842 INFO L132 encePairwiseOnDemand]: 67/79 looper letters, 749 selfloop transitions, 484 changer transitions 1/1285 dead transitions. [2021-11-09 08:58:45,842 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 586 places, 1285 transitions, 26885 flow [2021-11-09 08:58:45,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-09 08:58:45,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-11-09 08:58:45,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1515 transitions. [2021-11-09 08:58:45,846 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7990506329113924 [2021-11-09 08:58:45,846 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1515 transitions. [2021-11-09 08:58:45,846 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1515 transitions. [2021-11-09 08:58:45,847 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 08:58:45,847 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1515 transitions. [2021-11-09 08:58:45,850 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 63.125) internal successors, (1515), 24 states have internal predecessors, (1515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:45,853 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 79.0) internal successors, (1975), 25 states have internal predecessors, (1975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:45,854 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 79.0) internal successors, (1975), 25 states have internal predecessors, (1975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:45,854 INFO L186 Difference]: Start difference. First operand has 563 places, 1158 transitions, 22568 flow. Second operand 24 states and 1515 transitions. [2021-11-09 08:58:45,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 586 places, 1285 transitions, 26885 flow [2021-11-09 08:58:47,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 566 places, 1285 transitions, 26043 flow, removed 105 selfloop flow, removed 20 redundant places. [2021-11-09 08:58:47,790 INFO L242 Difference]: Finished difference. Result has 572 places, 1179 transitions, 23113 flow [2021-11-09 08:58:47,791 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=21726, PETRI_DIFFERENCE_MINUEND_PLACES=543, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=465, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=680, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=23113, PETRI_PLACES=572, PETRI_TRANSITIONS=1179} [2021-11-09 08:58:47,791 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 502 predicate places. [2021-11-09 08:58:47,792 INFO L470 AbstractCegarLoop]: Abstraction has has 572 places, 1179 transitions, 23113 flow [2021-11-09 08:58:47,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 60.5) internal successors, (726), 12 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:47,792 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 08:58:47,792 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2021-11-09 08:58:47,816 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c571e0-6258-4e63-bef7-a3e5019b9b4f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-11-09 08:58:47,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c571e0-6258-4e63-bef7-a3e5019b9b4f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-09 08:58:47,993 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 08:58:47,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:58:47,993 INFO L85 PathProgramCache]: Analyzing trace with hash -1747534366, now seen corresponding path program 20 times [2021-11-09 08:58:47,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:58:47,993 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753609666] [2021-11-09 08:58:47,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:58:47,994 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:58:48,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:58:48,127 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:58:48,127 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:58:48,127 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753609666] [2021-11-09 08:58:48,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753609666] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:58:48,128 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578125194] [2021-11-09 08:58:48,128 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:58:48,128 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:58:48,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c571e0-6258-4e63-bef7-a3e5019b9b4f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:58:48,129 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c571e0-6258-4e63-bef7-a3e5019b9b4f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:58:48,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c571e0-6258-4e63-bef7-a3e5019b9b4f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-09 08:58:48,648 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:58:48,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:58:48,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-09 08:58:48,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:58:48,925 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:58:48,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578125194] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:58:48,925 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:58:48,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-11-09 08:58:48,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757524681] [2021-11-09 08:58:48,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-09 08:58:48,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:58:48,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-09 08:58:48,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-11-09 08:58:48,928 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 79 [2021-11-09 08:58:48,928 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 572 places, 1179 transitions, 23113 flow. Second operand has 11 states, 11 states have (on average 60.45454545454545) internal successors, (665), 11 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:48,928 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 08:58:48,929 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 79 [2021-11-09 08:58:48,929 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 08:58:54,226 INFO L129 PetriNetUnfolder]: 2577/7819 cut-off events. [2021-11-09 08:58:54,226 INFO L130 PetriNetUnfolder]: For 191947/191970 co-relation queries the response was YES. [2021-11-09 08:58:54,452 INFO L84 FinitePrefix]: Finished finitePrefix Result has 59193 conditions, 7819 events. 2577/7819 cut-off events. For 191947/191970 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 82681 event pairs, 535 based on Foata normal form. 19/7756 useless extension candidates. Maximal degree in co-relation 58994. Up to 4470 conditions per place. [2021-11-09 08:58:54,503 INFO L132 encePairwiseOnDemand]: 67/79 looper letters, 1057 selfloop transitions, 244 changer transitions 0/1352 dead transitions. [2021-11-09 08:58:54,503 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 591 places, 1352 transitions, 29141 flow [2021-11-09 08:58:54,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-09 08:58:54,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-11-09 08:58:54,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1262 transitions. [2021-11-09 08:58:54,505 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7987341772151899 [2021-11-09 08:58:54,505 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1262 transitions. [2021-11-09 08:58:54,505 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1262 transitions. [2021-11-09 08:58:54,505 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 08:58:54,505 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1262 transitions. [2021-11-09 08:58:54,507 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 63.1) internal successors, (1262), 20 states have internal predecessors, (1262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:54,510 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 79.0) internal successors, (1659), 21 states have internal predecessors, (1659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:54,510 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 79.0) internal successors, (1659), 21 states have internal predecessors, (1659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:54,511 INFO L186 Difference]: Start difference. First operand has 572 places, 1179 transitions, 23113 flow. Second operand 20 states and 1262 transitions. [2021-11-09 08:58:54,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 591 places, 1352 transitions, 29141 flow [2021-11-09 08:58:56,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 578 places, 1352 transitions, 28513 flow, removed 95 selfloop flow, removed 13 redundant places. [2021-11-09 08:58:56,731 INFO L242 Difference]: Finished difference. Result has 583 places, 1252 transitions, 25129 flow [2021-11-09 08:58:56,733 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=22533, PETRI_DIFFERENCE_MINUEND_PLACES=559, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=961, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=25129, PETRI_PLACES=583, PETRI_TRANSITIONS=1252} [2021-11-09 08:58:56,733 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 513 predicate places. [2021-11-09 08:58:56,733 INFO L470 AbstractCegarLoop]: Abstraction has has 583 places, 1252 transitions, 25129 flow [2021-11-09 08:58:56,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 60.45454545454545) internal successors, (665), 11 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:56,733 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 08:58:56,734 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2021-11-09 08:58:56,762 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c571e0-6258-4e63-bef7-a3e5019b9b4f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-09 08:58:56,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c571e0-6258-4e63-bef7-a3e5019b9b4f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-09 08:58:56,934 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 08:58:56,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:58:56,935 INFO L85 PathProgramCache]: Analyzing trace with hash 1812708370, now seen corresponding path program 21 times [2021-11-09 08:58:56,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:58:56,935 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797455251] [2021-11-09 08:58:56,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:58:56,935 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:58:56,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:58:57,076 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:58:57,076 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:58:57,076 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797455251] [2021-11-09 08:58:57,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797455251] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:58:57,076 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335983552] [2021-11-09 08:58:57,077 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 08:58:57,077 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:58:57,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c571e0-6258-4e63-bef7-a3e5019b9b4f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:58:57,078 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c571e0-6258-4e63-bef7-a3e5019b9b4f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:58:57,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c571e0-6258-4e63-bef7-a3e5019b9b4f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-09 08:58:57,832 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-09 08:58:57,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:58:57,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-09 08:58:57,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:58:58,085 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:58:58,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335983552] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:58:58,085 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:58:58,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-11-09 08:58:58,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713364154] [2021-11-09 08:58:58,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-09 08:58:58,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:58:58,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-09 08:58:58,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-11-09 08:58:58,087 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 79 [2021-11-09 08:58:58,088 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 583 places, 1252 transitions, 25129 flow. Second operand has 11 states, 11 states have (on average 60.72727272727273) internal successors, (668), 11 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:58,088 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 08:58:58,088 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 79 [2021-11-09 08:58:58,088 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 08:59:04,033 INFO L129 PetriNetUnfolder]: 2720/8270 cut-off events. [2021-11-09 08:59:04,033 INFO L130 PetriNetUnfolder]: For 205735/205758 co-relation queries the response was YES. [2021-11-09 08:59:04,573 INFO L84 FinitePrefix]: Finished finitePrefix Result has 62770 conditions, 8270 events. 2720/8270 cut-off events. For 205735/205758 co-relation queries the response was YES. Maximal size of possible extension queue 533. Compared 88623 event pairs, 590 based on Foata normal form. 24/8208 useless extension candidates. Maximal degree in co-relation 62565. Up to 4751 conditions per place. [2021-11-09 08:59:04,631 INFO L132 encePairwiseOnDemand]: 67/79 looper letters, 1129 selfloop transitions, 229 changer transitions 2/1411 dead transitions. [2021-11-09 08:59:04,631 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 610 places, 1411 transitions, 30928 flow [2021-11-09 08:59:04,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-09 08:59:04,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-11-09 08:59:04,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1735 transitions. [2021-11-09 08:59:04,633 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7843580470162749 [2021-11-09 08:59:04,633 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1735 transitions. [2021-11-09 08:59:04,634 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1735 transitions. [2021-11-09 08:59:04,634 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 08:59:04,634 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1735 transitions. [2021-11-09 08:59:04,636 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 61.964285714285715) internal successors, (1735), 28 states have internal predecessors, (1735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:59:04,638 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 79.0) internal successors, (2291), 29 states have internal predecessors, (2291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:59:04,639 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 79.0) internal successors, (2291), 29 states have internal predecessors, (2291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:59:04,639 INFO L186 Difference]: Start difference. First operand has 583 places, 1252 transitions, 25129 flow. Second operand 28 states and 1735 transitions. [2021-11-09 08:59:04,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 610 places, 1411 transitions, 30928 flow [2021-11-09 08:59:06,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 596 places, 1411 transitions, 29899 flow, removed 274 selfloop flow, removed 14 redundant places. [2021-11-09 08:59:06,767 INFO L242 Difference]: Finished difference. Result has 603 places, 1292 transitions, 25972 flow [2021-11-09 08:59:06,768 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=24265, PETRI_DIFFERENCE_MINUEND_PLACES=569, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=190, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1027, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=25972, PETRI_PLACES=603, PETRI_TRANSITIONS=1292} [2021-11-09 08:59:06,768 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 533 predicate places. [2021-11-09 08:59:06,769 INFO L470 AbstractCegarLoop]: Abstraction has has 603 places, 1292 transitions, 25972 flow [2021-11-09 08:59:06,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 60.72727272727273) internal successors, (668), 11 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:59:06,769 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 08:59:06,769 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2021-11-09 08:59:06,791 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c571e0-6258-4e63-bef7-a3e5019b9b4f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-11-09 08:59:06,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c571e0-6258-4e63-bef7-a3e5019b9b4f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:59:06,970 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 08:59:06,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:59:06,970 INFO L85 PathProgramCache]: Analyzing trace with hash 789780164, now seen corresponding path program 22 times [2021-11-09 08:59:06,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:59:06,971 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758412434] [2021-11-09 08:59:06,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:59:06,971 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:59:06,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:59:07,113 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:59:07,113 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:59:07,113 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758412434] [2021-11-09 08:59:07,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758412434] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:59:07,114 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991040251] [2021-11-09 08:59:07,114 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 08:59:07,114 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:59:07,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c571e0-6258-4e63-bef7-a3e5019b9b4f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:59:07,115 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c571e0-6258-4e63-bef7-a3e5019b9b4f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:59:07,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c571e0-6258-4e63-bef7-a3e5019b9b4f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-09 08:59:07,705 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 08:59:07,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:59:07,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-09 08:59:07,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:59:07,984 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:59:07,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991040251] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:59:07,985 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:59:07,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-11-09 08:59:07,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864626987] [2021-11-09 08:59:07,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-09 08:59:07,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:59:07,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-09 08:59:07,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-11-09 08:59:07,987 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 79 [2021-11-09 08:59:07,988 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 603 places, 1292 transitions, 25972 flow. Second operand has 11 states, 11 states have (on average 60.72727272727273) internal successors, (668), 11 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:59:07,988 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 08:59:07,988 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 79 [2021-11-09 08:59:07,988 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 08:59:13,458 INFO L129 PetriNetUnfolder]: 2840/8501 cut-off events. [2021-11-09 08:59:13,459 INFO L130 PetriNetUnfolder]: For 216598/216628 co-relation queries the response was YES. [2021-11-09 08:59:13,760 INFO L84 FinitePrefix]: Finished finitePrefix Result has 65191 conditions, 8501 events. 2840/8501 cut-off events. For 216598/216628 co-relation queries the response was YES. Maximal size of possible extension queue 537. Compared 90963 event pairs, 591 based on Foata normal form. 30/8440 useless extension candidates. Maximal degree in co-relation 64984. Up to 4934 conditions per place. [2021-11-09 08:59:13,810 INFO L132 encePairwiseOnDemand]: 67/79 looper letters, 1138 selfloop transitions, 236 changer transitions 2/1427 dead transitions. [2021-11-09 08:59:13,810 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 625 places, 1427 transitions, 31224 flow [2021-11-09 08:59:13,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-09 08:59:13,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-11-09 08:59:13,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1492 transitions. [2021-11-09 08:59:13,812 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7869198312236287 [2021-11-09 08:59:13,812 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1492 transitions. [2021-11-09 08:59:13,812 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1492 transitions. [2021-11-09 08:59:13,813 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 08:59:13,813 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1492 transitions. [2021-11-09 08:59:13,814 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 62.166666666666664) internal successors, (1492), 24 states have internal predecessors, (1492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:59:13,816 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 79.0) internal successors, (1975), 25 states have internal predecessors, (1975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:59:13,817 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 79.0) internal successors, (1975), 25 states have internal predecessors, (1975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:59:13,817 INFO L186 Difference]: Start difference. First operand has 603 places, 1292 transitions, 25972 flow. Second operand 24 states and 1492 transitions. [2021-11-09 08:59:13,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 625 places, 1427 transitions, 31224 flow [2021-11-09 08:59:16,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 599 places, 1427 transitions, 30606 flow, removed 115 selfloop flow, removed 26 redundant places. [2021-11-09 08:59:16,157 INFO L242 Difference]: Finished difference. Result has 601 places, 1321 transitions, 26811 flow [2021-11-09 08:59:16,158 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=25352, PETRI_DIFFERENCE_MINUEND_PLACES=576, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=203, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1059, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=26811, PETRI_PLACES=601, PETRI_TRANSITIONS=1321} [2021-11-09 08:59:16,159 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 531 predicate places. [2021-11-09 08:59:16,159 INFO L470 AbstractCegarLoop]: Abstraction has has 601 places, 1321 transitions, 26811 flow [2021-11-09 08:59:16,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 60.72727272727273) internal successors, (668), 11 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:59:16,159 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 08:59:16,160 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2021-11-09 08:59:16,183 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c571e0-6258-4e63-bef7-a3e5019b9b4f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-09 08:59:16,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c571e0-6258-4e63-bef7-a3e5019b9b4f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-09 08:59:16,363 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 08:59:16,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:59:16,363 INFO L85 PathProgramCache]: Analyzing trace with hash -427225874, now seen corresponding path program 23 times [2021-11-09 08:59:16,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:59:16,363 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097802153] [2021-11-09 08:59:16,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:59:16,364 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:59:16,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:59:16,531 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:59:16,531 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:59:16,531 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097802153] [2021-11-09 08:59:16,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097802153] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:59:16,531 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978647575] [2021-11-09 08:59:16,531 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 08:59:16,531 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:59:16,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c571e0-6258-4e63-bef7-a3e5019b9b4f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:59:16,532 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c571e0-6258-4e63-bef7-a3e5019b9b4f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:59:16,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c571e0-6258-4e63-bef7-a3e5019b9b4f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-09 08:59:17,108 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:59:17,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:59:17,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-09 08:59:17,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:59:17,390 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:59:17,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978647575] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:59:17,390 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:59:17,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-11-09 08:59:17,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753883789] [2021-11-09 08:59:17,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-09 08:59:17,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:59:17,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-09 08:59:17,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-11-09 08:59:17,394 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 79 [2021-11-09 08:59:17,394 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 601 places, 1321 transitions, 26811 flow. Second operand has 16 states, 16 states have (on average 60.0625) internal successors, (961), 16 states have internal predecessors, (961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:59:17,394 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 08:59:17,395 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 79 [2021-11-09 08:59:17,395 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand