./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/array-eq-symm.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_14ea6955-a048-4d68-840e-d43066125d28/bin/uautomizer-IVEQpCNsaX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ea6955-a048-4d68-840e-d43066125d28/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_14ea6955-a048-4d68-840e-d43066125d28/bin/uautomizer-IVEQpCNsaX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ea6955-a048-4d68-840e-d43066125d28/bin/uautomizer-IVEQpCNsaX/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/array-eq-symm.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ea6955-a048-4d68-840e-d43066125d28/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_14ea6955-a048-4d68-840e-d43066125d28/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 1a172ae6dd3a5207c1a2580ce55cc24497fcf78586be62b7482a56f18aa6beb2 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-f8e1c90 [2021-11-09 08:38:22,875 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-09 08:38:22,877 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-09 08:38:22,908 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-09 08:38:22,909 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-09 08:38:22,910 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-09 08:38:22,912 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-09 08:38:22,914 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-09 08:38:22,916 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-09 08:38:22,917 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-09 08:38:22,919 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-09 08:38:22,920 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-09 08:38:22,921 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-09 08:38:22,922 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-09 08:38:22,924 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-09 08:38:22,930 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-09 08:38:22,931 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-09 08:38:22,932 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-09 08:38:22,935 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-09 08:38:22,938 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-09 08:38:22,940 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-09 08:38:22,950 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-09 08:38:22,952 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-09 08:38:22,953 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-09 08:38:22,957 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-09 08:38:22,957 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-09 08:38:22,958 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-09 08:38:22,959 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-09 08:38:22,960 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-09 08:38:22,961 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-09 08:38:22,961 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-09 08:38:22,962 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-09 08:38:22,967 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-09 08:38:22,969 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-09 08:38:22,971 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-09 08:38:22,971 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-09 08:38:22,972 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-09 08:38:22,972 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-09 08:38:22,972 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-09 08:38:22,974 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-09 08:38:22,974 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-09 08:38:22,975 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ea6955-a048-4d68-840e-d43066125d28/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-09 08:38:23,025 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-09 08:38:23,025 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-09 08:38:23,026 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-09 08:38:23,026 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-09 08:38:23,027 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-09 08:38:23,028 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-09 08:38:23,028 INFO L138 SettingsManager]: * Use SBE=true [2021-11-09 08:38:23,028 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-09 08:38:23,028 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-09 08:38:23,029 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-09 08:38:23,030 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-09 08:38:23,030 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-09 08:38:23,030 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-09 08:38:23,031 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-09 08:38:23,031 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-09 08:38:23,031 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-09 08:38:23,031 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-09 08:38:23,031 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-09 08:38:23,032 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-09 08:38:23,032 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-09 08:38:23,032 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-09 08:38:23,032 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-09 08:38:23,032 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 08:38:23,033 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-09 08:38:23,033 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-09 08:38:23,033 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-09 08:38:23,033 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-09 08:38:23,033 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-09 08:38:23,034 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-09 08:38:23,034 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-09 08:38:23,034 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-09 08:38:23,034 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-09 08:38:23,035 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_14ea6955-a048-4d68-840e-d43066125d28/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ea6955-a048-4d68-840e-d43066125d28/bin/uautomizer-IVEQpCNsaX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1a172ae6dd3a5207c1a2580ce55cc24497fcf78586be62b7482a56f18aa6beb2 [2021-11-09 08:38:23,295 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-09 08:38:23,322 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-09 08:38:23,324 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-09 08:38:23,326 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-09 08:38:23,326 INFO L275 PluginConnector]: CDTParser initialized [2021-11-09 08:38:23,327 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ea6955-a048-4d68-840e-d43066125d28/bin/uautomizer-IVEQpCNsaX/../../sv-benchmarks/c/weaver/array-eq-symm.wvr.c [2021-11-09 08:38:23,410 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ea6955-a048-4d68-840e-d43066125d28/bin/uautomizer-IVEQpCNsaX/data/23ece9401/30004ae39ed4469aaf1b51ef845577b8/FLAG452a10c81 [2021-11-09 08:38:23,951 INFO L306 CDTParser]: Found 1 translation units. [2021-11-09 08:38:23,952 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ea6955-a048-4d68-840e-d43066125d28/sv-benchmarks/c/weaver/array-eq-symm.wvr.c [2021-11-09 08:38:23,962 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ea6955-a048-4d68-840e-d43066125d28/bin/uautomizer-IVEQpCNsaX/data/23ece9401/30004ae39ed4469aaf1b51ef845577b8/FLAG452a10c81 [2021-11-09 08:38:24,299 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ea6955-a048-4d68-840e-d43066125d28/bin/uautomizer-IVEQpCNsaX/data/23ece9401/30004ae39ed4469aaf1b51ef845577b8 [2021-11-09 08:38:24,304 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-09 08:38:24,305 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-09 08:38:24,306 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-09 08:38:24,307 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-09 08:38:24,310 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-09 08:38:24,311 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 08:38:24" (1/1) ... [2021-11-09 08:38:24,312 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f69727f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:38:24, skipping insertion in model container [2021-11-09 08:38:24,312 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 08:38:24" (1/1) ... [2021-11-09 08:38:24,318 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-09 08:38:24,337 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-09 08:38:24,576 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_14ea6955-a048-4d68-840e-d43066125d28/sv-benchmarks/c/weaver/array-eq-symm.wvr.c[2251,2264] [2021-11-09 08:38:24,584 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 08:38:24,593 INFO L203 MainTranslator]: Completed pre-run [2021-11-09 08:38:24,612 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_14ea6955-a048-4d68-840e-d43066125d28/sv-benchmarks/c/weaver/array-eq-symm.wvr.c[2251,2264] [2021-11-09 08:38:24,616 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 08:38:24,632 INFO L208 MainTranslator]: Completed translation [2021-11-09 08:38:24,632 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:38:24 WrapperNode [2021-11-09 08:38:24,632 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-09 08:38:24,634 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-09 08:38:24,634 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-09 08:38:24,634 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-09 08:38:24,645 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:38:24" (1/1) ... [2021-11-09 08:38:24,656 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:38:24" (1/1) ... [2021-11-09 08:38:24,680 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-09 08:38:24,681 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-09 08:38:24,682 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-09 08:38:24,682 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-09 08:38:24,690 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:38:24" (1/1) ... [2021-11-09 08:38:24,691 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:38:24" (1/1) ... [2021-11-09 08:38:24,694 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:38:24" (1/1) ... [2021-11-09 08:38:24,694 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:38:24" (1/1) ... [2021-11-09 08:38:24,724 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:38:24" (1/1) ... [2021-11-09 08:38:24,729 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:38:24" (1/1) ... [2021-11-09 08:38:24,730 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:38:24" (1/1) ... [2021-11-09 08:38:24,733 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-09 08:38:24,735 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-09 08:38:24,743 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-09 08:38:24,743 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-09 08:38:24,744 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:38:24" (1/1) ... [2021-11-09 08:38:24,754 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 08:38:24,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ea6955-a048-4d68-840e-d43066125d28/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:38:24,777 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ea6955-a048-4d68-840e-d43066125d28/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-09 08:38:24,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ea6955-a048-4d68-840e-d43066125d28/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-09 08:38:24,820 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-11-09 08:38:24,820 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-11-09 08:38:24,820 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-11-09 08:38:24,820 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-11-09 08:38:24,821 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-09 08:38:24,821 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-09 08:38:24,821 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-09 08:38:24,821 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-09 08:38:24,821 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-09 08:38:24,821 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-09 08:38:24,821 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-09 08:38:24,821 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-09 08:38:24,823 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 08:38:25,299 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-09 08:38:25,299 INFO L299 CfgBuilder]: Removed 22 assume(true) statements. [2021-11-09 08:38:25,302 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 08:38:25 BoogieIcfgContainer [2021-11-09 08:38:25,302 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-09 08:38:25,304 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-09 08:38:25,304 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-09 08:38:25,307 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-09 08:38:25,308 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 08:38:24" (1/3) ... [2021-11-09 08:38:25,309 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@117744f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 08:38:25, skipping insertion in model container [2021-11-09 08:38:25,309 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:38:24" (2/3) ... [2021-11-09 08:38:25,309 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@117744f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 08:38:25, skipping insertion in model container [2021-11-09 08:38:25,310 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 08:38:25" (3/3) ... [2021-11-09 08:38:25,311 INFO L111 eAbstractionObserver]: Analyzing ICFG array-eq-symm.wvr.c [2021-11-09 08:38:25,320 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-11-09 08:38:25,321 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-09 08:38:25,321 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-09 08:38:25,322 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-11-09 08:38:25,360 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:38:25,360 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:38:25,360 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:38:25,361 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:38:25,361 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:38:25,361 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:38:25,361 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:38:25,362 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:38:25,362 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:38:25,362 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:38:25,362 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:38:25,363 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:38:25,363 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:38:25,363 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:38:25,363 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:38:25,363 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:38:25,364 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:38:25,364 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:38:25,364 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:38:25,364 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:38:25,365 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:38:25,365 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:38:25,365 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:38:25,365 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:38:25,365 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:38:25,366 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:38:25,366 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:38:25,366 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:38:25,366 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:38:25,367 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:38:25,367 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:38:25,368 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:38:25,368 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:38:25,368 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:38:25,368 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:38:25,369 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:38:25,369 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:38:25,369 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:38:25,369 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:38:25,370 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:38:25,370 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:38:25,370 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:38:25,370 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:38:25,370 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:38:25,371 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:38:25,371 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:38:25,371 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:38:25,371 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:38:25,372 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:38:25,372 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:38:25,372 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:38:25,372 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:38:25,373 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:38:25,373 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:38:25,373 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:38:25,373 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:38:25,374 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:38:25,374 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:38:25,374 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:38:25,374 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:38:25,377 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:38:25,379 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:38:25,379 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:38:25,380 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:38:25,380 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:38:25,384 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:38:25,384 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:38:25,384 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:38:25,384 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:38:25,384 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:38:25,399 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-11-09 08:38:25,462 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-09 08:38:25,473 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 08:38:25,473 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-11-09 08:38:25,499 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 148 places, 156 transitions, 328 flow [2021-11-09 08:38:25,571 INFO L129 PetriNetUnfolder]: 15/154 cut-off events. [2021-11-09 08:38:25,571 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-11-09 08:38:25,576 INFO L84 FinitePrefix]: Finished finitePrefix Result has 163 conditions, 154 events. 15/154 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 117 event pairs, 0 based on Foata normal form. 0/138 useless extension candidates. Maximal degree in co-relation 116. Up to 3 conditions per place. [2021-11-09 08:38:25,576 INFO L82 GeneralOperation]: Start removeDead. Operand has 148 places, 156 transitions, 328 flow [2021-11-09 08:38:25,583 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 138 places, 146 transitions, 304 flow [2021-11-09 08:38:25,678 INFO L129 PetriNetUnfolder]: 15/145 cut-off events. [2021-11-09 08:38:25,679 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-11-09 08:38:25,679 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 08:38:25,680 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, 1, 1, 1, 1, 1, 1, 1, 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 08:38:25,680 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 08:38:25,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:38:25,686 INFO L85 PathProgramCache]: Analyzing trace with hash -1395795278, now seen corresponding path program 1 times [2021-11-09 08:38:25,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:38:25,696 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772300894] [2021-11-09 08:38:25,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:38:25,697 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:38:25,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:38:25,995 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 08:38:25,996 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:38:25,996 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772300894] [2021-11-09 08:38:25,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772300894] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:38:25,997 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:38:25,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-09 08:38:25,999 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049276623] [2021-11-09 08:38:26,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-09 08:38:26,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:38:26,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-09 08:38:26,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-09 08:38:26,028 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 156 [2021-11-09 08:38:26,032 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 146 transitions, 304 flow. Second operand has 2 states, 2 states have (on average 147.5) internal successors, (295), 2 states have internal predecessors, (295), 0 states have call successors, (0), 0 states 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 08:38:26,033 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 08:38:26,033 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 156 [2021-11-09 08:38:26,034 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 08:38:26,095 INFO L129 PetriNetUnfolder]: 6/137 cut-off events. [2021-11-09 08:38:26,095 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-11-09 08:38:26,096 INFO L84 FinitePrefix]: Finished finitePrefix Result has 147 conditions, 137 events. 6/137 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 106 event pairs, 0 based on Foata normal form. 9/135 useless extension candidates. Maximal degree in co-relation 143. Up to 2 conditions per place. [2021-11-09 08:38:26,098 INFO L132 encePairwiseOnDemand]: 147/156 looper letters, 0 selfloop transitions, 0 changer transitions 5/137 dead transitions. [2021-11-09 08:38:26,098 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 137 transitions, 286 flow [2021-11-09 08:38:26,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-09 08:38:26,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-11-09 08:38:26,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 301 transitions. [2021-11-09 08:38:26,123 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9647435897435898 [2021-11-09 08:38:26,124 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 301 transitions. [2021-11-09 08:38:26,124 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 301 transitions. [2021-11-09 08:38:26,127 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 08:38:26,129 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 301 transitions. [2021-11-09 08:38:26,134 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 150.5) internal successors, (301), 2 states have internal predecessors, (301), 0 states have call successors, (0), 0 states 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 08:38:26,139 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 156.0) internal successors, (468), 3 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 08:38:26,140 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 156.0) internal successors, (468), 3 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 08:38:26,142 INFO L186 Difference]: Start difference. First operand has 138 places, 146 transitions, 304 flow. Second operand 2 states and 301 transitions. [2021-11-09 08:38:26,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 137 transitions, 286 flow [2021-11-09 08:38:26,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 137 transitions, 278 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-11-09 08:38:26,151 INFO L242 Difference]: Finished difference. Result has 135 places, 132 transitions, 268 flow [2021-11-09 08:38:26,153 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=278, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=268, PETRI_PLACES=135, PETRI_TRANSITIONS=132} [2021-11-09 08:38:26,154 INFO L334 CegarLoopForPetriNet]: 138 programPoint places, -3 predicate places. [2021-11-09 08:38:26,154 INFO L470 AbstractCegarLoop]: Abstraction has has 135 places, 132 transitions, 268 flow [2021-11-09 08:38:26,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 147.5) internal successors, (295), 2 states have internal predecessors, (295), 0 states have call successors, (0), 0 states 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 08:38:26,155 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 08:38:26,155 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, 1, 1, 1, 1, 1, 1, 1, 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 08:38:26,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-09 08:38:26,156 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 08:38:26,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:38:26,156 INFO L85 PathProgramCache]: Analyzing trace with hash 828654467, now seen corresponding path program 1 times [2021-11-09 08:38:26,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:38:26,157 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058915454] [2021-11-09 08:38:26,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:38:26,157 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:38:26,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:38:26,507 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 08:38:26,507 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:38:26,508 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058915454] [2021-11-09 08:38:26,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058915454] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:38:26,509 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:38:26,509 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-09 08:38:26,509 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234961439] [2021-11-09 08:38:26,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 08:38:26,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:38:26,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 08:38:26,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-09 08:38:26,517 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 156 [2021-11-09 08:38:26,519 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 132 transitions, 268 flow. Second operand has 6 states, 6 states have (on average 111.0) internal successors, (666), 6 states have internal predecessors, (666), 0 states have call successors, (0), 0 states 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 08:38:26,519 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 08:38:26,519 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 156 [2021-11-09 08:38:26,519 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 08:38:26,852 INFO L129 PetriNetUnfolder]: 144/548 cut-off events. [2021-11-09 08:38:26,852 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-11-09 08:38:26,858 INFO L84 FinitePrefix]: Finished finitePrefix Result has 816 conditions, 548 events. 144/548 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2680 event pairs, 30 based on Foata normal form. 1/474 useless extension candidates. Maximal degree in co-relation 813. Up to 107 conditions per place. [2021-11-09 08:38:26,862 INFO L132 encePairwiseOnDemand]: 149/156 looper letters, 57 selfloop transitions, 5 changer transitions 3/163 dead transitions. [2021-11-09 08:38:26,863 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 163 transitions, 460 flow [2021-11-09 08:38:26,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 08:38:26,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-11-09 08:38:26,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 708 transitions. [2021-11-09 08:38:26,869 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7564102564102564 [2021-11-09 08:38:26,869 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 708 transitions. [2021-11-09 08:38:26,869 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 708 transitions. [2021-11-09 08:38:26,870 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 08:38:26,870 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 708 transitions. [2021-11-09 08:38:26,875 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 118.0) internal successors, (708), 6 states have internal predecessors, (708), 0 states have call successors, (0), 0 states 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 08:38:26,880 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 156.0) internal successors, (1092), 7 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states 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 08:38:26,881 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 156.0) internal successors, (1092), 7 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states 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 08:38:26,882 INFO L186 Difference]: Start difference. First operand has 135 places, 132 transitions, 268 flow. Second operand 6 states and 708 transitions. [2021-11-09 08:38:26,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 163 transitions, 460 flow [2021-11-09 08:38:26,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 163 transitions, 460 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-11-09 08:38:26,894 INFO L242 Difference]: Finished difference. Result has 138 places, 135 transitions, 297 flow [2021-11-09 08:38:26,895 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=268, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=297, PETRI_PLACES=138, PETRI_TRANSITIONS=135} [2021-11-09 08:38:26,895 INFO L334 CegarLoopForPetriNet]: 138 programPoint places, 0 predicate places. [2021-11-09 08:38:26,895 INFO L470 AbstractCegarLoop]: Abstraction has has 138 places, 135 transitions, 297 flow [2021-11-09 08:38:26,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 111.0) internal successors, (666), 6 states have internal predecessors, (666), 0 states have call successors, (0), 0 states 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 08:38:26,896 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 08:38:26,897 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:38:26,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-09 08:38:26,897 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 08:38:26,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:38:26,898 INFO L85 PathProgramCache]: Analyzing trace with hash -80087054, now seen corresponding path program 1 times [2021-11-09 08:38:26,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:38:26,899 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929974292] [2021-11-09 08:38:26,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:38:26,899 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:38:26,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:38:27,156 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 08:38:27,156 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:38:27,156 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929974292] [2021-11-09 08:38:27,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929974292] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:38:27,158 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:38:27,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-09 08:38:27,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682995119] [2021-11-09 08:38:27,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 08:38:27,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:38:27,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 08:38:27,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-11-09 08:38:27,165 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 156 [2021-11-09 08:38:27,166 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 135 transitions, 297 flow. Second operand has 7 states, 7 states have (on average 113.85714285714286) internal successors, (797), 7 states have internal predecessors, (797), 0 states have call successors, (0), 0 states 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 08:38:27,166 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 08:38:27,167 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 156 [2021-11-09 08:38:27,167 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 08:38:27,427 INFO L129 PetriNetUnfolder]: 84/548 cut-off events. [2021-11-09 08:38:27,428 INFO L130 PetriNetUnfolder]: For 6/9 co-relation queries the response was YES. [2021-11-09 08:38:27,430 INFO L84 FinitePrefix]: Finished finitePrefix Result has 780 conditions, 548 events. 84/548 cut-off events. For 6/9 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 2491 event pairs, 24 based on Foata normal form. 0/477 useless extension candidates. Maximal degree in co-relation 773. Up to 69 conditions per place. [2021-11-09 08:38:27,433 INFO L132 encePairwiseOnDemand]: 144/156 looper letters, 53 selfloop transitions, 14 changer transitions 0/165 dead transitions. [2021-11-09 08:38:27,433 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 165 transitions, 497 flow [2021-11-09 08:38:27,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-09 08:38:27,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-11-09 08:38:27,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1167 transitions. [2021-11-09 08:38:27,441 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7480769230769231 [2021-11-09 08:38:27,442 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1167 transitions. [2021-11-09 08:38:27,442 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1167 transitions. [2021-11-09 08:38:27,443 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 08:38:27,444 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1167 transitions. [2021-11-09 08:38:27,448 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 116.7) internal successors, (1167), 10 states have internal predecessors, (1167), 0 states have call successors, (0), 0 states 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 08:38:27,453 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 156.0) internal successors, (1716), 11 states have internal predecessors, (1716), 0 states have call successors, (0), 0 states 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 08:38:27,454 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 156.0) internal successors, (1716), 11 states have internal predecessors, (1716), 0 states have call successors, (0), 0 states 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 08:38:27,460 INFO L186 Difference]: Start difference. First operand has 138 places, 135 transitions, 297 flow. Second operand 10 states and 1167 transitions. [2021-11-09 08:38:27,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 165 transitions, 497 flow [2021-11-09 08:38:27,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 165 transitions, 493 flow, removed 2 selfloop flow, removed 2 redundant places. [2021-11-09 08:38:27,470 INFO L242 Difference]: Finished difference. Result has 146 places, 140 transitions, 354 flow [2021-11-09 08:38:27,471 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=293, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=354, PETRI_PLACES=146, PETRI_TRANSITIONS=140} [2021-11-09 08:38:27,471 INFO L334 CegarLoopForPetriNet]: 138 programPoint places, 8 predicate places. [2021-11-09 08:38:27,471 INFO L470 AbstractCegarLoop]: Abstraction has has 146 places, 140 transitions, 354 flow [2021-11-09 08:38:27,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 113.85714285714286) internal successors, (797), 7 states have internal predecessors, (797), 0 states have call successors, (0), 0 states 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 08:38:27,472 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 08:38:27,473 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:38:27,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-09 08:38:27,473 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 08:38:27,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:38:27,475 INFO L85 PathProgramCache]: Analyzing trace with hash 1191282200, now seen corresponding path program 1 times [2021-11-09 08:38:27,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:38:27,475 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139674614] [2021-11-09 08:38:27,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:38:27,475 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:38:27,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:38:27,657 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 08:38:27,657 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:38:27,658 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139674614] [2021-11-09 08:38:27,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139674614] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:38:27,658 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:38:27,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-09 08:38:27,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604127000] [2021-11-09 08:38:27,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 08:38:27,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:38:27,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 08:38:27,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-11-09 08:38:27,668 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 156 [2021-11-09 08:38:27,669 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 140 transitions, 354 flow. Second operand has 7 states, 7 states have (on average 113.85714285714286) internal successors, (797), 7 states have internal predecessors, (797), 0 states have call successors, (0), 0 states 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 08:38:27,669 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 08:38:27,669 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 156 [2021-11-09 08:38:27,670 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 08:38:27,900 INFO L129 PetriNetUnfolder]: 67/436 cut-off events. [2021-11-09 08:38:27,900 INFO L130 PetriNetUnfolder]: For 52/57 co-relation queries the response was YES. [2021-11-09 08:38:27,902 INFO L84 FinitePrefix]: Finished finitePrefix Result has 680 conditions, 436 events. 67/436 cut-off events. For 52/57 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1879 event pairs, 21 based on Foata normal form. 0/383 useless extension candidates. Maximal degree in co-relation 671. Up to 63 conditions per place. [2021-11-09 08:38:27,906 INFO L132 encePairwiseOnDemand]: 144/156 looper letters, 39 selfloop transitions, 11 changer transitions 15/163 dead transitions. [2021-11-09 08:38:27,906 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 163 transitions, 534 flow [2021-11-09 08:38:27,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-09 08:38:27,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-11-09 08:38:27,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1165 transitions. [2021-11-09 08:38:27,911 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7467948717948718 [2021-11-09 08:38:27,911 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1165 transitions. [2021-11-09 08:38:27,912 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1165 transitions. [2021-11-09 08:38:27,913 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 08:38:27,913 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1165 transitions. [2021-11-09 08:38:27,918 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 116.5) internal successors, (1165), 10 states have internal predecessors, (1165), 0 states have call successors, (0), 0 states 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 08:38:27,922 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 156.0) internal successors, (1716), 11 states have internal predecessors, (1716), 0 states have call successors, (0), 0 states 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 08:38:27,925 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 156.0) internal successors, (1716), 11 states have internal predecessors, (1716), 0 states have call successors, (0), 0 states 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 08:38:27,925 INFO L186 Difference]: Start difference. First operand has 146 places, 140 transitions, 354 flow. Second operand 10 states and 1165 transitions. [2021-11-09 08:38:27,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 163 transitions, 534 flow [2021-11-09 08:38:27,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 163 transitions, 526 flow, removed 0 selfloop flow, removed 3 redundant places. [2021-11-09 08:38:27,932 INFO L242 Difference]: Finished difference. Result has 153 places, 137 transitions, 359 flow [2021-11-09 08:38:27,933 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=346, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=359, PETRI_PLACES=153, PETRI_TRANSITIONS=137} [2021-11-09 08:38:27,933 INFO L334 CegarLoopForPetriNet]: 138 programPoint places, 15 predicate places. [2021-11-09 08:38:27,933 INFO L470 AbstractCegarLoop]: Abstraction has has 153 places, 137 transitions, 359 flow [2021-11-09 08:38:27,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 113.85714285714286) internal successors, (797), 7 states have internal predecessors, (797), 0 states have call successors, (0), 0 states 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 08:38:27,934 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 08:38:27,934 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:38:27,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-09 08:38:27,935 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 08:38:27,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:38:27,935 INFO L85 PathProgramCache]: Analyzing trace with hash 155612564, now seen corresponding path program 1 times [2021-11-09 08:38:27,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:38:27,936 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779450067] [2021-11-09 08:38:27,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:38:27,937 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:38:27,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:38:28,104 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 08:38:28,104 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:38:28,105 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779450067] [2021-11-09 08:38:28,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779450067] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:38:28,106 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:38:28,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-09 08:38:28,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586962336] [2021-11-09 08:38:28,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 08:38:28,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:38:28,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 08:38:28,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-11-09 08:38:28,112 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 156 [2021-11-09 08:38:28,113 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 137 transitions, 359 flow. Second operand has 7 states, 7 states have (on average 114.42857142857143) internal successors, (801), 7 states have internal predecessors, (801), 0 states have call successors, (0), 0 states 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 08:38:28,114 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 08:38:28,114 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 156 [2021-11-09 08:38:28,114 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 08:38:28,352 INFO L129 PetriNetUnfolder]: 83/526 cut-off events. [2021-11-09 08:38:28,353 INFO L130 PetriNetUnfolder]: For 96/99 co-relation queries the response was YES. [2021-11-09 08:38:28,355 INFO L84 FinitePrefix]: Finished finitePrefix Result has 825 conditions, 526 events. 83/526 cut-off events. For 96/99 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 2420 event pairs, 24 based on Foata normal form. 3/494 useless extension candidates. Maximal degree in co-relation 815. Up to 69 conditions per place. [2021-11-09 08:38:28,358 INFO L132 encePairwiseOnDemand]: 146/156 looper letters, 46 selfloop transitions, 10 changer transitions 0/154 dead transitions. [2021-11-09 08:38:28,359 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 154 transitions, 515 flow [2021-11-09 08:38:28,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-09 08:38:28,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-11-09 08:38:28,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 935 transitions. [2021-11-09 08:38:28,363 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.749198717948718 [2021-11-09 08:38:28,364 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 935 transitions. [2021-11-09 08:38:28,364 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 935 transitions. [2021-11-09 08:38:28,365 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 08:38:28,365 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 935 transitions. [2021-11-09 08:38:28,368 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 116.875) internal successors, (935), 8 states have internal predecessors, (935), 0 states have call successors, (0), 0 states 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 08:38:28,371 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 156.0) internal successors, (1404), 9 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states 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 08:38:28,372 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 156.0) internal successors, (1404), 9 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states 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 08:38:28,373 INFO L186 Difference]: Start difference. First operand has 153 places, 137 transitions, 359 flow. Second operand 8 states and 935 transitions. [2021-11-09 08:38:28,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 154 transitions, 515 flow [2021-11-09 08:38:28,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 154 transitions, 480 flow, removed 5 selfloop flow, removed 10 redundant places. [2021-11-09 08:38:28,381 INFO L242 Difference]: Finished difference. Result has 148 places, 139 transitions, 364 flow [2021-11-09 08:38:28,382 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=330, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=364, PETRI_PLACES=148, PETRI_TRANSITIONS=139} [2021-11-09 08:38:28,382 INFO L334 CegarLoopForPetriNet]: 138 programPoint places, 10 predicate places. [2021-11-09 08:38:28,382 INFO L470 AbstractCegarLoop]: Abstraction has has 148 places, 139 transitions, 364 flow [2021-11-09 08:38:28,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 114.42857142857143) internal successors, (801), 7 states have internal predecessors, (801), 0 states have call successors, (0), 0 states 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 08:38:28,383 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 08:38:28,383 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:38:28,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-09 08:38:28,384 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 08:38:28,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:38:28,384 INFO L85 PathProgramCache]: Analyzing trace with hash -806334828, now seen corresponding path program 1 times [2021-11-09 08:38:28,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:38:28,385 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196558430] [2021-11-09 08:38:28,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:38:28,388 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:38:28,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:38:28,527 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 08:38:28,528 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:38:28,528 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196558430] [2021-11-09 08:38:28,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196558430] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:38:28,528 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:38:28,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-09 08:38:28,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500815273] [2021-11-09 08:38:28,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 08:38:28,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:38:28,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 08:38:28,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-11-09 08:38:28,534 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 156 [2021-11-09 08:38:28,535 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 139 transitions, 364 flow. Second operand has 7 states, 7 states have (on average 114.42857142857143) internal successors, (801), 7 states have internal predecessors, (801), 0 states have call successors, (0), 0 states 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 08:38:28,535 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 08:38:28,535 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 156 [2021-11-09 08:38:28,536 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 08:38:28,744 INFO L129 PetriNetUnfolder]: 66/414 cut-off events. [2021-11-09 08:38:28,744 INFO L130 PetriNetUnfolder]: For 59/64 co-relation queries the response was YES. [2021-11-09 08:38:28,746 INFO L84 FinitePrefix]: Finished finitePrefix Result has 656 conditions, 414 events. 66/414 cut-off events. For 59/64 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1815 event pairs, 21 based on Foata normal form. 0/363 useless extension candidates. Maximal degree in co-relation 646. Up to 63 conditions per place. [2021-11-09 08:38:28,749 INFO L132 encePairwiseOnDemand]: 146/156 looper letters, 42 selfloop transitions, 9 changer transitions 3/152 dead transitions. [2021-11-09 08:38:28,749 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 152 transitions, 502 flow [2021-11-09 08:38:28,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-09 08:38:28,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-11-09 08:38:28,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 933 transitions. [2021-11-09 08:38:28,753 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7475961538461539 [2021-11-09 08:38:28,754 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 933 transitions. [2021-11-09 08:38:28,754 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 933 transitions. [2021-11-09 08:38:28,755 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 08:38:28,755 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 933 transitions. [2021-11-09 08:38:28,758 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 116.625) internal successors, (933), 8 states have internal predecessors, (933), 0 states have call successors, (0), 0 states 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 08:38:28,761 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 156.0) internal successors, (1404), 9 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states 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 08:38:28,762 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 156.0) internal successors, (1404), 9 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states 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 08:38:28,763 INFO L186 Difference]: Start difference. First operand has 148 places, 139 transitions, 364 flow. Second operand 8 states and 933 transitions. [2021-11-09 08:38:28,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 152 transitions, 502 flow [2021-11-09 08:38:28,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 152 transitions, 484 flow, removed 0 selfloop flow, removed 5 redundant places. [2021-11-09 08:38:28,771 INFO L242 Difference]: Finished difference. Result has 151 places, 138 transitions, 360 flow [2021-11-09 08:38:28,771 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=346, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=360, PETRI_PLACES=151, PETRI_TRANSITIONS=138} [2021-11-09 08:38:28,772 INFO L334 CegarLoopForPetriNet]: 138 programPoint places, 13 predicate places. [2021-11-09 08:38:28,772 INFO L470 AbstractCegarLoop]: Abstraction has has 151 places, 138 transitions, 360 flow [2021-11-09 08:38:28,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 114.42857142857143) internal successors, (801), 7 states have internal predecessors, (801), 0 states have call successors, (0), 0 states 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 08:38:28,773 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 08:38:28,773 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:38:28,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-09 08:38:28,773 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 08:38:28,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:38:28,774 INFO L85 PathProgramCache]: Analyzing trace with hash 216151815, now seen corresponding path program 1 times [2021-11-09 08:38:28,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:38:28,774 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243605891] [2021-11-09 08:38:28,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:38:28,775 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:38:28,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:38:29,042 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 08:38:29,043 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:38:29,043 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243605891] [2021-11-09 08:38:29,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243605891] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:38:29,043 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425043223] [2021-11-09 08:38:29,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:38:29,044 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:38:29,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ea6955-a048-4d68-840e-d43066125d28/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:38:29,047 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ea6955-a048-4d68-840e-d43066125d28/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:38:29,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ea6955-a048-4d68-840e-d43066125d28/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-09 08:38:29,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:38:29,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-09 08:38:29,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:38:30,242 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 08:38:30,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425043223] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:38:30,243 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:38:30,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-11-09 08:38:30,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468717794] [2021-11-09 08:38:30,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-09 08:38:30,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:38:30,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-09 08:38:30,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2021-11-09 08:38:30,252 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 156 [2021-11-09 08:38:30,256 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 138 transitions, 360 flow. Second operand has 22 states, 22 states have (on average 110.95454545454545) internal successors, (2441), 22 states have internal predecessors, (2441), 0 states have call successors, (0), 0 states 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 08:38:30,257 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 08:38:30,257 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 156 [2021-11-09 08:38:30,257 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 08:38:30,627 INFO L129 PetriNetUnfolder]: 56/369 cut-off events. [2021-11-09 08:38:30,628 INFO L130 PetriNetUnfolder]: For 79/83 co-relation queries the response was YES. [2021-11-09 08:38:30,629 INFO L84 FinitePrefix]: Finished finitePrefix Result has 608 conditions, 369 events. 56/369 cut-off events. For 79/83 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1553 event pairs, 16 based on Foata normal form. 5/338 useless extension candidates. Maximal degree in co-relation 597. Up to 63 conditions per place. [2021-11-09 08:38:30,631 INFO L132 encePairwiseOnDemand]: 142/156 looper letters, 41 selfloop transitions, 14 changer transitions 0/151 dead transitions. [2021-11-09 08:38:30,632 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 151 transitions, 502 flow [2021-11-09 08:38:30,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-09 08:38:30,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-11-09 08:38:30,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1567 transitions. [2021-11-09 08:38:30,638 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7174908424908425 [2021-11-09 08:38:30,638 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1567 transitions. [2021-11-09 08:38:30,638 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1567 transitions. [2021-11-09 08:38:30,640 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 08:38:30,640 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1567 transitions. [2021-11-09 08:38:30,645 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 111.92857142857143) internal successors, (1567), 14 states have internal predecessors, (1567), 0 states have call successors, (0), 0 states 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 08:38:30,650 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 156.0) internal successors, (2340), 15 states have internal predecessors, (2340), 0 states have call successors, (0), 0 states 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 08:38:30,652 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 156.0) internal successors, (2340), 15 states have internal predecessors, (2340), 0 states have call successors, (0), 0 states 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 08:38:30,652 INFO L186 Difference]: Start difference. First operand has 151 places, 138 transitions, 360 flow. Second operand 14 states and 1567 transitions. [2021-11-09 08:38:30,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 151 transitions, 502 flow [2021-11-09 08:38:30,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 151 transitions, 474 flow, removed 4 selfloop flow, removed 8 redundant places. [2021-11-09 08:38:30,657 INFO L242 Difference]: Finished difference. Result has 157 places, 140 transitions, 381 flow [2021-11-09 08:38:30,658 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=336, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=381, PETRI_PLACES=157, PETRI_TRANSITIONS=140} [2021-11-09 08:38:30,658 INFO L334 CegarLoopForPetriNet]: 138 programPoint places, 19 predicate places. [2021-11-09 08:38:30,659 INFO L470 AbstractCegarLoop]: Abstraction has has 157 places, 140 transitions, 381 flow [2021-11-09 08:38:30,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 110.95454545454545) internal successors, (2441), 22 states have internal predecessors, (2441), 0 states have call successors, (0), 0 states 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 08:38:30,660 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 08:38:30,661 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:38:30,698 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ea6955-a048-4d68-840e-d43066125d28/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-09 08:38:30,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ea6955-a048-4d68-840e-d43066125d28/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:38:30,888 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 08:38:30,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:38:30,888 INFO L85 PathProgramCache]: Analyzing trace with hash -1730533241, now seen corresponding path program 1 times [2021-11-09 08:38:30,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:38:30,889 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796120759] [2021-11-09 08:38:30,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:38:30,889 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:38:30,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:38:31,112 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 08:38:31,113 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:38:31,113 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796120759] [2021-11-09 08:38:31,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796120759] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:38:31,114 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854219962] [2021-11-09 08:38:31,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:38:31,114 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:38:31,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ea6955-a048-4d68-840e-d43066125d28/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:38:31,115 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ea6955-a048-4d68-840e-d43066125d28/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:38:31,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ea6955-a048-4d68-840e-d43066125d28/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-09 08:38:31,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:38:31,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-09 08:38:31,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:38:32,035 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 08:38:32,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854219962] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:38:32,036 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:38:32,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-11-09 08:38:32,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846111242] [2021-11-09 08:38:32,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-09 08:38:32,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:38:32,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-09 08:38:32,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2021-11-09 08:38:32,044 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 156 [2021-11-09 08:38:32,047 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 140 transitions, 381 flow. Second operand has 22 states, 22 states have (on average 110.86363636363636) internal successors, (2439), 22 states have internal predecessors, (2439), 0 states have call successors, (0), 0 states 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 08:38:32,047 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 08:38:32,048 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 156 [2021-11-09 08:38:32,048 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 08:38:32,393 INFO L129 PetriNetUnfolder]: 47/351 cut-off events. [2021-11-09 08:38:32,394 INFO L130 PetriNetUnfolder]: For 77/80 co-relation queries the response was YES. [2021-11-09 08:38:32,395 INFO L84 FinitePrefix]: Finished finitePrefix Result has 570 conditions, 351 events. 47/351 cut-off events. For 77/80 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1247 event pairs, 12 based on Foata normal form. 0/325 useless extension candidates. Maximal degree in co-relation 558. Up to 56 conditions per place. [2021-11-09 08:38:32,397 INFO L132 encePairwiseOnDemand]: 142/156 looper letters, 41 selfloop transitions, 14 changer transitions 0/151 dead transitions. [2021-11-09 08:38:32,397 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 151 transitions, 517 flow [2021-11-09 08:38:32,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-09 08:38:32,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-11-09 08:38:32,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1567 transitions. [2021-11-09 08:38:32,404 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7174908424908425 [2021-11-09 08:38:32,404 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1567 transitions. [2021-11-09 08:38:32,404 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1567 transitions. [2021-11-09 08:38:32,406 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 08:38:32,406 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1567 transitions. [2021-11-09 08:38:32,411 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 111.92857142857143) internal successors, (1567), 14 states have internal predecessors, (1567), 0 states have call successors, (0), 0 states 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 08:38:32,417 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 156.0) internal successors, (2340), 15 states have internal predecessors, (2340), 0 states have call successors, (0), 0 states 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 08:38:32,418 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 156.0) internal successors, (2340), 15 states have internal predecessors, (2340), 0 states have call successors, (0), 0 states 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 08:38:32,418 INFO L186 Difference]: Start difference. First operand has 157 places, 140 transitions, 381 flow. Second operand 14 states and 1567 transitions. [2021-11-09 08:38:32,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 151 transitions, 517 flow [2021-11-09 08:38:32,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 151 transitions, 491 flow, removed 0 selfloop flow, removed 11 redundant places. [2021-11-09 08:38:32,424 INFO L242 Difference]: Finished difference. Result has 160 places, 140 transitions, 388 flow [2021-11-09 08:38:32,425 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=355, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=388, PETRI_PLACES=160, PETRI_TRANSITIONS=140} [2021-11-09 08:38:32,425 INFO L334 CegarLoopForPetriNet]: 138 programPoint places, 22 predicate places. [2021-11-09 08:38:32,425 INFO L470 AbstractCegarLoop]: Abstraction has has 160 places, 140 transitions, 388 flow [2021-11-09 08:38:32,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 110.86363636363636) internal successors, (2439), 22 states have internal predecessors, (2439), 0 states have call successors, (0), 0 states 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 08:38:32,427 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 08:38:32,428 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:38:32,464 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ea6955-a048-4d68-840e-d43066125d28/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-09 08:38:32,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ea6955-a048-4d68-840e-d43066125d28/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-09 08:38:32,643 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 08:38:32,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:38:32,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1892902254, now seen corresponding path program 1 times [2021-11-09 08:38:32,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:38:32,644 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140600441] [2021-11-09 08:38:32,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:38:32,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:38:32,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:38:33,269 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-09 08:38:33,269 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:38:33,269 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140600441] [2021-11-09 08:38:33,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140600441] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:38:33,270 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504384510] [2021-11-09 08:38:33,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:38:33,270 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:38:33,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ea6955-a048-4d68-840e-d43066125d28/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:38:33,276 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ea6955-a048-4d68-840e-d43066125d28/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:38:33,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ea6955-a048-4d68-840e-d43066125d28/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-09 08:38:33,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:38:33,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-09 08:38:33,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:38:34,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-09 08:38:34,641 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-09 08:38:34,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504384510] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:38:34,643 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:38:34,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 22 [2021-11-09 08:38:34,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754738109] [2021-11-09 08:38:34,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-09 08:38:34,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:38:34,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-09 08:38:34,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2021-11-09 08:38:34,651 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 156 [2021-11-09 08:38:34,653 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 140 transitions, 388 flow. Second operand has 22 states, 22 states have (on average 90.54545454545455) internal successors, (1992), 22 states have internal predecessors, (1992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:38:34,654 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 08:38:34,654 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 156 [2021-11-09 08:38:34,654 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 08:38:36,457 INFO L129 PetriNetUnfolder]: 2484/4596 cut-off events. [2021-11-09 08:38:36,458 INFO L130 PetriNetUnfolder]: For 819/819 co-relation queries the response was YES. [2021-11-09 08:38:36,473 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9664 conditions, 4596 events. 2484/4596 cut-off events. For 819/819 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 32188 event pairs, 171 based on Foata normal form. 0/4289 useless extension candidates. Maximal degree in co-relation 9651. Up to 1331 conditions per place. [2021-11-09 08:38:36,506 INFO L132 encePairwiseOnDemand]: 125/156 looper letters, 257 selfloop transitions, 75 changer transitions 0/410 dead transitions. [2021-11-09 08:38:36,506 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 410 transitions, 1700 flow [2021-11-09 08:38:36,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-09 08:38:36,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-11-09 08:38:36,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 3678 transitions. [2021-11-09 08:38:36,521 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6204453441295547 [2021-11-09 08:38:36,522 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 3678 transitions. [2021-11-09 08:38:36,522 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 3678 transitions. [2021-11-09 08:38:36,526 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 08:38:36,526 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 3678 transitions. [2021-11-09 08:38:36,537 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 96.78947368421052) internal successors, (3678), 38 states have internal predecessors, (3678), 0 states have call successors, (0), 0 states 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 08:38:36,551 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 156.0) internal successors, (6084), 39 states have internal predecessors, (6084), 0 states have call successors, (0), 0 states 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 08:38:36,554 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 156.0) internal successors, (6084), 39 states have internal predecessors, (6084), 0 states have call successors, (0), 0 states 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 08:38:36,554 INFO L186 Difference]: Start difference. First operand has 160 places, 140 transitions, 388 flow. Second operand 38 states and 3678 transitions. [2021-11-09 08:38:36,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 410 transitions, 1700 flow [2021-11-09 08:38:36,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 410 transitions, 1660 flow, removed 0 selfloop flow, removed 13 redundant places. [2021-11-09 08:38:36,566 INFO L242 Difference]: Finished difference. Result has 200 places, 195 transitions, 813 flow [2021-11-09 08:38:36,567 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=358, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=813, PETRI_PLACES=200, PETRI_TRANSITIONS=195} [2021-11-09 08:38:36,567 INFO L334 CegarLoopForPetriNet]: 138 programPoint places, 62 predicate places. [2021-11-09 08:38:36,568 INFO L470 AbstractCegarLoop]: Abstraction has has 200 places, 195 transitions, 813 flow [2021-11-09 08:38:36,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 90.54545454545455) internal successors, (1992), 22 states have internal predecessors, (1992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:38:36,585 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 08:38:36,586 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:38:36,620 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ea6955-a048-4d68-840e-d43066125d28/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-09 08:38:36,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ea6955-a048-4d68-840e-d43066125d28/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:38:36,808 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 08:38:36,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:38:36,808 INFO L85 PathProgramCache]: Analyzing trace with hash -822267054, now seen corresponding path program 2 times [2021-11-09 08:38:36,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:38:36,809 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140740223] [2021-11-09 08:38:36,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:38:36,809 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:38:36,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:38:37,487 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-09 08:38:37,488 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:38:37,488 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140740223] [2021-11-09 08:38:37,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140740223] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:38:37,488 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:38:37,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-09 08:38:37,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789066028] [2021-11-09 08:38:37,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-09 08:38:37,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:38:37,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-09 08:38:37,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2021-11-09 08:38:37,492 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 156 [2021-11-09 08:38:37,494 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 195 transitions, 813 flow. Second operand has 19 states, 19 states have (on average 90.57894736842105) internal successors, (1721), 19 states have internal predecessors, (1721), 0 states have call successors, (0), 0 states 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 08:38:37,494 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 08:38:37,494 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 156 [2021-11-09 08:38:37,494 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 08:38:39,209 INFO L129 PetriNetUnfolder]: 2505/4677 cut-off events. [2021-11-09 08:38:39,210 INFO L130 PetriNetUnfolder]: For 4951/4969 co-relation queries the response was YES. [2021-11-09 08:38:39,237 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13382 conditions, 4677 events. 2505/4677 cut-off events. For 4951/4969 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 33054 event pairs, 486 based on Foata normal form. 9/4657 useless extension candidates. Maximal degree in co-relation 13353. Up to 2358 conditions per place. [2021-11-09 08:38:39,273 INFO L132 encePairwiseOnDemand]: 126/156 looper letters, 164 selfloop transitions, 70 changer transitions 33/345 dead transitions. [2021-11-09 08:38:39,274 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 345 transitions, 2037 flow [2021-11-09 08:38:39,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-09 08:38:39,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-11-09 08:38:39,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 2924 transitions. [2021-11-09 08:38:39,281 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6046319272125724 [2021-11-09 08:38:39,282 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 2924 transitions. [2021-11-09 08:38:39,282 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 2924 transitions. [2021-11-09 08:38:39,284 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 08:38:39,284 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 2924 transitions. [2021-11-09 08:38:39,294 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 94.3225806451613) internal successors, (2924), 31 states have internal predecessors, (2924), 0 states have call successors, (0), 0 states 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 08:38:39,304 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 156.0) internal successors, (4992), 32 states have internal predecessors, (4992), 0 states have call successors, (0), 0 states 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 08:38:39,306 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 156.0) internal successors, (4992), 32 states have internal predecessors, (4992), 0 states have call successors, (0), 0 states 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 08:38:39,306 INFO L186 Difference]: Start difference. First operand has 200 places, 195 transitions, 813 flow. Second operand 31 states and 2924 transitions. [2021-11-09 08:38:39,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 345 transitions, 2037 flow [2021-11-09 08:38:39,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 345 transitions, 1972 flow, removed 0 selfloop flow, removed 16 redundant places. [2021-11-09 08:38:39,370 INFO L242 Difference]: Finished difference. Result has 227 places, 223 transitions, 1212 flow [2021-11-09 08:38:39,372 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=760, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=1212, PETRI_PLACES=227, PETRI_TRANSITIONS=223} [2021-11-09 08:38:39,372 INFO L334 CegarLoopForPetriNet]: 138 programPoint places, 89 predicate places. [2021-11-09 08:38:39,372 INFO L470 AbstractCegarLoop]: Abstraction has has 227 places, 223 transitions, 1212 flow [2021-11-09 08:38:39,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 90.57894736842105) internal successors, (1721), 19 states have internal predecessors, (1721), 0 states have call successors, (0), 0 states 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 08:38:39,373 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 08:38:39,373 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:38:39,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-09 08:38:39,374 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 08:38:39,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:38:39,375 INFO L85 PathProgramCache]: Analyzing trace with hash 1584986834, now seen corresponding path program 3 times [2021-11-09 08:38:39,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:38:39,375 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849181500] [2021-11-09 08:38:39,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:38:39,376 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:38:39,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:38:40,479 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-09 08:38:40,479 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:38:40,479 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849181500] [2021-11-09 08:38:40,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849181500] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:38:40,480 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:38:40,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-11-09 08:38:40,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981487524] [2021-11-09 08:38:40,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-09 08:38:40,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:38:40,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-09 08:38:40,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-11-09 08:38:40,484 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 156 [2021-11-09 08:38:40,486 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 223 transitions, 1212 flow. Second operand has 22 states, 22 states have (on average 81.5) internal successors, (1793), 22 states have internal predecessors, (1793), 0 states have call successors, (0), 0 states 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 08:38:40,486 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 08:38:40,486 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 156 [2021-11-09 08:38:40,487 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 08:38:43,431 INFO L129 PetriNetUnfolder]: 3036/5587 cut-off events. [2021-11-09 08:38:43,431 INFO L130 PetriNetUnfolder]: For 11168/11186 co-relation queries the response was YES. [2021-11-09 08:38:43,487 INFO L84 FinitePrefix]: Finished finitePrefix Result has 18426 conditions, 5587 events. 3036/5587 cut-off events. For 11168/11186 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 41366 event pairs, 289 based on Foata normal form. 43/5591 useless extension candidates. Maximal degree in co-relation 18383. Up to 1434 conditions per place. [2021-11-09 08:38:43,605 INFO L132 encePairwiseOnDemand]: 124/156 looper letters, 220 selfloop transitions, 122 changer transitions 3/417 dead transitions. [2021-11-09 08:38:43,605 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 417 transitions, 2915 flow [2021-11-09 08:38:43,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-09 08:38:43,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-11-09 08:38:43,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 3126 transitions. [2021-11-09 08:38:43,614 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5566239316239316 [2021-11-09 08:38:43,614 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 3126 transitions. [2021-11-09 08:38:43,614 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 3126 transitions. [2021-11-09 08:38:43,615 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 08:38:43,616 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 3126 transitions. [2021-11-09 08:38:43,621 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 86.83333333333333) internal successors, (3126), 36 states have internal predecessors, (3126), 0 states have call successors, (0), 0 states 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 08:38:43,630 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 156.0) internal successors, (5772), 37 states have internal predecessors, (5772), 0 states have call successors, (0), 0 states 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 08:38:43,633 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 156.0) internal successors, (5772), 37 states have internal predecessors, (5772), 0 states have call successors, (0), 0 states 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 08:38:43,633 INFO L186 Difference]: Start difference. First operand has 227 places, 223 transitions, 1212 flow. Second operand 36 states and 3126 transitions. [2021-11-09 08:38:43,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 417 transitions, 2915 flow [2021-11-09 08:38:43,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 417 transitions, 2813 flow, removed 35 selfloop flow, removed 17 redundant places. [2021-11-09 08:38:43,721 INFO L242 Difference]: Finished difference. Result has 253 places, 262 transitions, 1935 flow [2021-11-09 08:38:43,722 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=1146, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=1935, PETRI_PLACES=253, PETRI_TRANSITIONS=262} [2021-11-09 08:38:43,722 INFO L334 CegarLoopForPetriNet]: 138 programPoint places, 115 predicate places. [2021-11-09 08:38:43,723 INFO L470 AbstractCegarLoop]: Abstraction has has 253 places, 262 transitions, 1935 flow [2021-11-09 08:38:43,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 81.5) internal successors, (1793), 22 states have internal predecessors, (1793), 0 states have call successors, (0), 0 states 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 08:38:43,724 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 08:38:43,724 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:38:43,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-09 08:38:43,724 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 08:38:43,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:38:43,725 INFO L85 PathProgramCache]: Analyzing trace with hash 1834244174, now seen corresponding path program 1 times [2021-11-09 08:38:43,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:38:43,725 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327424085] [2021-11-09 08:38:43,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:38:43,726 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:38:43,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:38:44,272 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-09 08:38:44,272 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:38:44,272 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327424085] [2021-11-09 08:38:44,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327424085] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:38:44,273 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:38:44,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-09 08:38:44,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37060544] [2021-11-09 08:38:44,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-09 08:38:44,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:38:44,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-09 08:38:44,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2021-11-09 08:38:44,277 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 156 [2021-11-09 08:38:44,279 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 262 transitions, 1935 flow. Second operand has 19 states, 19 states have (on average 90.57894736842105) internal successors, (1721), 19 states have internal predecessors, (1721), 0 states have call successors, (0), 0 states 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 08:38:44,279 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 08:38:44,279 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 156 [2021-11-09 08:38:44,279 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 08:38:46,272 INFO L129 PetriNetUnfolder]: 3111/5826 cut-off events. [2021-11-09 08:38:46,273 INFO L130 PetriNetUnfolder]: For 20020/20038 co-relation queries the response was YES. [2021-11-09 08:38:46,339 INFO L84 FinitePrefix]: Finished finitePrefix Result has 21708 conditions, 5826 events. 3111/5826 cut-off events. For 20020/20038 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 43891 event pairs, 1025 based on Foata normal form. 18/5786 useless extension candidates. Maximal degree in co-relation 21653. Up to 3273 conditions per place. [2021-11-09 08:38:46,375 INFO L132 encePairwiseOnDemand]: 125/156 looper letters, 189 selfloop transitions, 77 changer transitions 29/373 dead transitions. [2021-11-09 08:38:46,376 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 373 transitions, 3124 flow [2021-11-09 08:38:46,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-09 08:38:46,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-11-09 08:38:46,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 2844 transitions. [2021-11-09 08:38:46,382 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6076923076923076 [2021-11-09 08:38:46,382 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 2844 transitions. [2021-11-09 08:38:46,382 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 2844 transitions. [2021-11-09 08:38:46,384 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 08:38:46,384 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 2844 transitions. [2021-11-09 08:38:46,390 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 94.8) internal successors, (2844), 30 states have internal predecessors, (2844), 0 states have call successors, (0), 0 states 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 08:38:46,399 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 156.0) internal successors, (4836), 31 states have internal predecessors, (4836), 0 states have call successors, (0), 0 states 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 08:38:46,401 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 156.0) internal successors, (4836), 31 states have internal predecessors, (4836), 0 states have call successors, (0), 0 states 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 08:38:46,401 INFO L186 Difference]: Start difference. First operand has 253 places, 262 transitions, 1935 flow. Second operand 30 states and 2844 transitions. [2021-11-09 08:38:46,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 373 transitions, 3124 flow [2021-11-09 08:38:46,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 373 transitions, 2973 flow, removed 47 selfloop flow, removed 20 redundant places. [2021-11-09 08:38:46,599 INFO L242 Difference]: Finished difference. Result has 269 places, 274 transitions, 2112 flow [2021-11-09 08:38:46,599 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=1811, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=2112, PETRI_PLACES=269, PETRI_TRANSITIONS=274} [2021-11-09 08:38:46,600 INFO L334 CegarLoopForPetriNet]: 138 programPoint places, 131 predicate places. [2021-11-09 08:38:46,600 INFO L470 AbstractCegarLoop]: Abstraction has has 269 places, 274 transitions, 2112 flow [2021-11-09 08:38:46,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 90.57894736842105) internal successors, (1721), 19 states have internal predecessors, (1721), 0 states have call successors, (0), 0 states 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 08:38:46,601 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 08:38:46,601 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:38:46,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-09 08:38:46,602 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 08:38:46,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:38:46,603 INFO L85 PathProgramCache]: Analyzing trace with hash -1563232320, now seen corresponding path program 2 times [2021-11-09 08:38:46,603 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:38:46,603 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478365292] [2021-11-09 08:38:46,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:38:46,603 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:38:46,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:38:47,181 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-09 08:38:47,181 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:38:47,182 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478365292] [2021-11-09 08:38:47,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478365292] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:38:47,182 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:38:47,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-09 08:38:47,185 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240067776] [2021-11-09 08:38:47,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-09 08:38:47,185 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:38:47,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-09 08:38:47,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2021-11-09 08:38:47,190 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 156 [2021-11-09 08:38:47,192 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 274 transitions, 2112 flow. Second operand has 20 states, 20 states have (on average 90.45) internal successors, (1809), 20 states have internal predecessors, (1809), 0 states have call successors, (0), 0 states 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 08:38:47,192 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 08:38:47,192 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 156 [2021-11-09 08:38:47,192 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 08:38:49,326 INFO L129 PetriNetUnfolder]: 3211/5943 cut-off events. [2021-11-09 08:38:49,327 INFO L130 PetriNetUnfolder]: For 19658/19682 co-relation queries the response was YES. [2021-11-09 08:38:49,380 INFO L84 FinitePrefix]: Finished finitePrefix Result has 21954 conditions, 5943 events. 3211/5943 cut-off events. For 19658/19682 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 44196 event pairs, 889 based on Foata normal form. 35/5935 useless extension candidates. Maximal degree in co-relation 21895. Up to 3273 conditions per place. [2021-11-09 08:38:49,413 INFO L132 encePairwiseOnDemand]: 126/156 looper letters, 219 selfloop transitions, 142 changer transitions 0/439 dead transitions. [2021-11-09 08:38:49,413 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 439 transitions, 3885 flow [2021-11-09 08:38:49,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-09 08:38:49,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-11-09 08:38:49,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 3323 transitions. [2021-11-09 08:38:49,418 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6086080586080586 [2021-11-09 08:38:49,419 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 3323 transitions. [2021-11-09 08:38:49,419 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 3323 transitions. [2021-11-09 08:38:49,420 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 08:38:49,420 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 3323 transitions. [2021-11-09 08:38:49,425 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 94.94285714285714) internal successors, (3323), 35 states have internal predecessors, (3323), 0 states have call successors, (0), 0 states 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 08:38:49,433 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 156.0) internal successors, (5616), 36 states have internal predecessors, (5616), 0 states have call successors, (0), 0 states 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 08:38:49,435 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 156.0) internal successors, (5616), 36 states have internal predecessors, (5616), 0 states have call successors, (0), 0 states 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 08:38:49,435 INFO L186 Difference]: Start difference. First operand has 269 places, 274 transitions, 2112 flow. Second operand 35 states and 3323 transitions. [2021-11-09 08:38:49,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 439 transitions, 3885 flow [2021-11-09 08:38:49,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 439 transitions, 3749 flow, removed 25 selfloop flow, removed 21 redundant places. [2021-11-09 08:38:49,702 INFO L242 Difference]: Finished difference. Result has 286 places, 312 transitions, 2872 flow [2021-11-09 08:38:49,703 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=2010, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=2872, PETRI_PLACES=286, PETRI_TRANSITIONS=312} [2021-11-09 08:38:49,703 INFO L334 CegarLoopForPetriNet]: 138 programPoint places, 148 predicate places. [2021-11-09 08:38:49,703 INFO L470 AbstractCegarLoop]: Abstraction has has 286 places, 312 transitions, 2872 flow [2021-11-09 08:38:49,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 90.45) internal successors, (1809), 20 states have internal predecessors, (1809), 0 states have call successors, (0), 0 states 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 08:38:49,704 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 08:38:49,704 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:38:49,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-09 08:38:49,705 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 08:38:49,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:38:49,705 INFO L85 PathProgramCache]: Analyzing trace with hash -739894510, now seen corresponding path program 3 times [2021-11-09 08:38:49,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:38:49,706 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663353678] [2021-11-09 08:38:49,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:38:49,706 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:38:49,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:38:50,672 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-09 08:38:50,672 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:38:50,672 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663353678] [2021-11-09 08:38:50,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663353678] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:38:50,672 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:38:50,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-11-09 08:38:50,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089048993] [2021-11-09 08:38:50,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-09 08:38:50,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:38:50,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-09 08:38:50,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2021-11-09 08:38:50,676 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 156 [2021-11-09 08:38:50,678 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 312 transitions, 2872 flow. Second operand has 21 states, 21 states have (on average 81.61904761904762) internal successors, (1714), 21 states have internal predecessors, (1714), 0 states have call successors, (0), 0 states 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 08:38:50,678 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 08:38:50,678 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 156 [2021-11-09 08:38:50,678 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 08:38:53,198 INFO L129 PetriNetUnfolder]: 3230/6032 cut-off events. [2021-11-09 08:38:53,199 INFO L130 PetriNetUnfolder]: For 21881/21905 co-relation queries the response was YES. [2021-11-09 08:38:53,264 INFO L84 FinitePrefix]: Finished finitePrefix Result has 22893 conditions, 6032 events. 3230/6032 cut-off events. For 21881/21905 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 45669 event pairs, 1066 based on Foata normal form. 22/6008 useless extension candidates. Maximal degree in co-relation 22829. Up to 3277 conditions per place. [2021-11-09 08:38:53,416 INFO L132 encePairwiseOnDemand]: 125/156 looper letters, 194 selfloop transitions, 114 changer transitions 29/409 dead transitions. [2021-11-09 08:38:53,417 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 409 transitions, 4086 flow [2021-11-09 08:38:53,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-09 08:38:53,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-11-09 08:38:53,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 2647 transitions. [2021-11-09 08:38:53,447 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5473531844499586 [2021-11-09 08:38:53,448 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 2647 transitions. [2021-11-09 08:38:53,448 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 2647 transitions. [2021-11-09 08:38:53,450 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 08:38:53,451 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 2647 transitions. [2021-11-09 08:38:53,458 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 85.38709677419355) internal successors, (2647), 31 states have internal predecessors, (2647), 0 states have call successors, (0), 0 states 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 08:38:53,470 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 156.0) internal successors, (4992), 32 states have internal predecessors, (4992), 0 states have call successors, (0), 0 states 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 08:38:53,472 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 156.0) internal successors, (4992), 32 states have internal predecessors, (4992), 0 states have call successors, (0), 0 states 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 08:38:53,472 INFO L186 Difference]: Start difference. First operand has 286 places, 312 transitions, 2872 flow. Second operand 31 states and 2647 transitions. [2021-11-09 08:38:53,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 409 transitions, 4086 flow [2021-11-09 08:38:53,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 409 transitions, 3928 flow, removed 45 selfloop flow, removed 17 redundant places. [2021-11-09 08:38:53,655 INFO L242 Difference]: Finished difference. Result has 304 places, 316 transitions, 3048 flow [2021-11-09 08:38:53,657 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=2744, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=3048, PETRI_PLACES=304, PETRI_TRANSITIONS=316} [2021-11-09 08:38:53,657 INFO L334 CegarLoopForPetriNet]: 138 programPoint places, 166 predicate places. [2021-11-09 08:38:53,657 INFO L470 AbstractCegarLoop]: Abstraction has has 304 places, 316 transitions, 3048 flow [2021-11-09 08:38:53,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 81.61904761904762) internal successors, (1714), 21 states have internal predecessors, (1714), 0 states have call successors, (0), 0 states 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 08:38:53,658 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 08:38:53,658 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:38:53,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-09 08:38:53,659 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 08:38:53,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:38:53,659 INFO L85 PathProgramCache]: Analyzing trace with hash -857832102, now seen corresponding path program 4 times [2021-11-09 08:38:53,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:38:53,660 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127706528] [2021-11-09 08:38:53,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:38:53,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:38:53,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:38:54,174 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-09 08:38:54,174 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:38:54,174 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127706528] [2021-11-09 08:38:54,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127706528] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:38:54,174 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:38:54,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-09 08:38:54,175 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843130109] [2021-11-09 08:38:54,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-09 08:38:54,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:38:54,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-09 08:38:54,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-11-09 08:38:54,178 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 156 [2021-11-09 08:38:54,179 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 316 transitions, 3048 flow. Second operand has 19 states, 19 states have (on average 90.57894736842105) internal successors, (1721), 19 states have internal predecessors, (1721), 0 states have call successors, (0), 0 states 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 08:38:54,180 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 08:38:54,180 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 156 [2021-11-09 08:38:54,180 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 08:38:56,047 INFO L129 PetriNetUnfolder]: 3242/6014 cut-off events. [2021-11-09 08:38:56,047 INFO L130 PetriNetUnfolder]: For 19023/19042 co-relation queries the response was YES. [2021-11-09 08:38:56,092 INFO L84 FinitePrefix]: Finished finitePrefix Result has 22698 conditions, 6014 events. 3242/6014 cut-off events. For 19023/19042 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 44988 event pairs, 1072 based on Foata normal form. 10/5977 useless extension candidates. Maximal degree in co-relation 22629. Up to 3273 conditions per place. [2021-11-09 08:38:56,126 INFO L132 encePairwiseOnDemand]: 125/156 looper letters, 198 selfloop transitions, 124 changer transitions 10/410 dead transitions. [2021-11-09 08:38:56,127 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 410 transitions, 4417 flow [2021-11-09 08:38:56,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-09 08:38:56,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-11-09 08:38:56,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 2727 transitions. [2021-11-09 08:38:56,264 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6027851458885941 [2021-11-09 08:38:56,264 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 2727 transitions. [2021-11-09 08:38:56,264 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 2727 transitions. [2021-11-09 08:38:56,265 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 08:38:56,265 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 2727 transitions. [2021-11-09 08:38:56,270 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 94.03448275862068) internal successors, (2727), 29 states have internal predecessors, (2727), 0 states have call successors, (0), 0 states 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 08:38:56,276 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 156.0) internal successors, (4680), 30 states have internal predecessors, (4680), 0 states have call successors, (0), 0 states 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 08:38:56,288 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 156.0) internal successors, (4680), 30 states have internal predecessors, (4680), 0 states have call successors, (0), 0 states 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 08:38:56,289 INFO L186 Difference]: Start difference. First operand has 304 places, 316 transitions, 3048 flow. Second operand 29 states and 2727 transitions. [2021-11-09 08:38:56,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 410 transitions, 4417 flow [2021-11-09 08:38:56,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 410 transitions, 4242 flow, removed 14 selfloop flow, removed 24 redundant places. [2021-11-09 08:38:56,454 INFO L242 Difference]: Finished difference. Result has 309 places, 331 transitions, 3464 flow [2021-11-09 08:38:56,455 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=2891, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=3464, PETRI_PLACES=309, PETRI_TRANSITIONS=331} [2021-11-09 08:38:56,455 INFO L334 CegarLoopForPetriNet]: 138 programPoint places, 171 predicate places. [2021-11-09 08:38:56,455 INFO L470 AbstractCegarLoop]: Abstraction has has 309 places, 331 transitions, 3464 flow [2021-11-09 08:38:56,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 90.57894736842105) internal successors, (1721), 19 states have internal predecessors, (1721), 0 states have call successors, (0), 0 states 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 08:38:56,456 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 08:38:56,456 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:38:56,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-09 08:38:56,460 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 08:38:56,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:38:56,460 INFO L85 PathProgramCache]: Analyzing trace with hash 121648474, now seen corresponding path program 5 times [2021-11-09 08:38:56,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:38:56,461 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063313544] [2021-11-09 08:38:56,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:38:56,461 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:38:56,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:38:57,002 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-09 08:38:57,002 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:38:57,002 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063313544] [2021-11-09 08:38:57,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063313544] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:38:57,002 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:38:57,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-09 08:38:57,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442164416] [2021-11-09 08:38:57,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-09 08:38:57,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:38:57,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-09 08:38:57,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-11-09 08:38:57,006 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 156 [2021-11-09 08:38:57,007 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 331 transitions, 3464 flow. Second operand has 19 states, 19 states have (on average 90.57894736842105) internal successors, (1721), 19 states have internal predecessors, (1721), 0 states have call successors, (0), 0 states 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 08:38:57,007 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 08:38:57,008 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 156 [2021-11-09 08:38:57,008 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 08:38:59,039 INFO L129 PetriNetUnfolder]: 3302/6112 cut-off events. [2021-11-09 08:38:59,039 INFO L130 PetriNetUnfolder]: For 21022/21041 co-relation queries the response was YES. [2021-11-09 08:38:59,083 INFO L84 FinitePrefix]: Finished finitePrefix Result has 23689 conditions, 6112 events. 3302/6112 cut-off events. For 21022/21041 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 45794 event pairs, 1164 based on Foata normal form. 14/6070 useless extension candidates. Maximal degree in co-relation 23620. Up to 3273 conditions per place. [2021-11-09 08:38:59,114 INFO L132 encePairwiseOnDemand]: 124/156 looper letters, 221 selfloop transitions, 119 changer transitions 12/430 dead transitions. [2021-11-09 08:38:59,114 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 430 transitions, 4995 flow [2021-11-09 08:38:59,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-09 08:38:59,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-11-09 08:38:59,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 2736 transitions. [2021-11-09 08:38:59,120 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6047745358090185 [2021-11-09 08:38:59,120 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 2736 transitions. [2021-11-09 08:38:59,120 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 2736 transitions. [2021-11-09 08:38:59,121 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 08:38:59,122 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 2736 transitions. [2021-11-09 08:38:59,127 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 94.34482758620689) internal successors, (2736), 29 states have internal predecessors, (2736), 0 states have call successors, (0), 0 states 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 08:38:59,134 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 156.0) internal successors, (4680), 30 states have internal predecessors, (4680), 0 states have call successors, (0), 0 states 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 08:38:59,136 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 156.0) internal successors, (4680), 30 states have internal predecessors, (4680), 0 states have call successors, (0), 0 states 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 08:38:59,136 INFO L186 Difference]: Start difference. First operand has 309 places, 331 transitions, 3464 flow. Second operand 29 states and 2736 transitions. [2021-11-09 08:38:59,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 430 transitions, 4995 flow [2021-11-09 08:38:59,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 430 transitions, 4818 flow, removed 19 selfloop flow, removed 22 redundant places. [2021-11-09 08:38:59,324 INFO L242 Difference]: Finished difference. Result has 322 places, 352 transitions, 4006 flow [2021-11-09 08:38:59,325 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=3321, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=4006, PETRI_PLACES=322, PETRI_TRANSITIONS=352} [2021-11-09 08:38:59,325 INFO L334 CegarLoopForPetriNet]: 138 programPoint places, 184 predicate places. [2021-11-09 08:38:59,325 INFO L470 AbstractCegarLoop]: Abstraction has has 322 places, 352 transitions, 4006 flow [2021-11-09 08:38:59,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 90.57894736842105) internal successors, (1721), 19 states have internal predecessors, (1721), 0 states have call successors, (0), 0 states 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 08:38:59,326 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 08:38:59,326 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:38:59,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-09 08:38:59,327 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 08:38:59,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:38:59,327 INFO L85 PathProgramCache]: Analyzing trace with hash -428658698, now seen corresponding path program 6 times [2021-11-09 08:38:59,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:38:59,328 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741627508] [2021-11-09 08:38:59,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:38:59,328 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:38:59,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:38:59,890 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-09 08:38:59,891 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:38:59,891 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741627508] [2021-11-09 08:38:59,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741627508] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:38:59,891 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:38:59,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-09 08:38:59,892 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035360448] [2021-11-09 08:38:59,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-09 08:38:59,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:38:59,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-09 08:38:59,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-11-09 08:38:59,896 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 156 [2021-11-09 08:38:59,898 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 352 transitions, 4006 flow. Second operand has 19 states, 19 states have (on average 90.57894736842105) internal successors, (1721), 19 states have internal predecessors, (1721), 0 states have call successors, (0), 0 states 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 08:38:59,898 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 08:38:59,898 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 156 [2021-11-09 08:38:59,898 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 08:39:01,806 INFO L129 PetriNetUnfolder]: 3293/6111 cut-off events. [2021-11-09 08:39:01,806 INFO L130 PetriNetUnfolder]: For 23802/23821 co-relation queries the response was YES. [2021-11-09 08:39:01,854 INFO L84 FinitePrefix]: Finished finitePrefix Result has 23878 conditions, 6111 events. 3293/6111 cut-off events. For 23802/23821 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 45759 event pairs, 1110 based on Foata normal form. 10/6076 useless extension candidates. Maximal degree in co-relation 23802. Up to 3273 conditions per place. [2021-11-09 08:39:01,874 INFO L132 encePairwiseOnDemand]: 125/156 looper letters, 210 selfloop transitions, 136 changer transitions 10/434 dead transitions. [2021-11-09 08:39:01,874 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 434 transitions, 5307 flow [2021-11-09 08:39:01,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-09 08:39:01,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-11-09 08:39:01,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 2728 transitions. [2021-11-09 08:39:01,884 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6030061892130858 [2021-11-09 08:39:01,884 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 2728 transitions. [2021-11-09 08:39:01,884 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 2728 transitions. [2021-11-09 08:39:01,885 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 08:39:01,885 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 2728 transitions. [2021-11-09 08:39:01,890 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 94.06896551724138) internal successors, (2728), 29 states have internal predecessors, (2728), 0 states have call successors, (0), 0 states 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 08:39:01,896 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 156.0) internal successors, (4680), 30 states have internal predecessors, (4680), 0 states have call successors, (0), 0 states 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 08:39:01,897 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 156.0) internal successors, (4680), 30 states have internal predecessors, (4680), 0 states have call successors, (0), 0 states 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 08:39:01,898 INFO L186 Difference]: Start difference. First operand has 322 places, 352 transitions, 4006 flow. Second operand 29 states and 2728 transitions. [2021-11-09 08:39:01,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 434 transitions, 5307 flow [2021-11-09 08:39:02,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 434 transitions, 5099 flow, removed 32 selfloop flow, removed 21 redundant places. [2021-11-09 08:39:02,158 INFO L242 Difference]: Finished difference. Result has 333 places, 354 transitions, 4248 flow [2021-11-09 08:39:02,159 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=3824, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=4248, PETRI_PLACES=333, PETRI_TRANSITIONS=354} [2021-11-09 08:39:02,159 INFO L334 CegarLoopForPetriNet]: 138 programPoint places, 195 predicate places. [2021-11-09 08:39:02,159 INFO L470 AbstractCegarLoop]: Abstraction has has 333 places, 354 transitions, 4248 flow [2021-11-09 08:39:02,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 90.57894736842105) internal successors, (1721), 19 states have internal predecessors, (1721), 0 states have call successors, (0), 0 states 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 08:39:02,160 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 08:39:02,160 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:39:02,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-09 08:39:02,160 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 08:39:02,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:39:02,161 INFO L85 PathProgramCache]: Analyzing trace with hash -889921150, now seen corresponding path program 7 times [2021-11-09 08:39:02,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:39:02,161 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440974048] [2021-11-09 08:39:02,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:39:02,162 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:39:02,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:39:02,885 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-09 08:39:02,885 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:39:02,885 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440974048] [2021-11-09 08:39:02,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440974048] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:39:02,886 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452089519] [2021-11-09 08:39:02,886 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 08:39:02,886 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:39:02,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ea6955-a048-4d68-840e-d43066125d28/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:39:02,892 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ea6955-a048-4d68-840e-d43066125d28/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:39:02,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ea6955-a048-4d68-840e-d43066125d28/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-09 08:39:03,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:39:03,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 53 conjunts are in the unsatisfiable core [2021-11-09 08:39:03,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:39:03,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-09 08:39:03,696 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-09 08:39:03,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-09 08:39:05,204 INFO L354 Elim1Store]: treesize reduction 56, result has 21.1 percent of original size [2021-11-09 08:39:05,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 34 [2021-11-09 08:39:05,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-09 08:39:05,460 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-09 08:39:05,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452089519] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:39:05,460 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:39:05,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 31 [2021-11-09 08:39:05,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452993193] [2021-11-09 08:39:05,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-09 08:39:05,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:39:05,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-09 08:39:05,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=812, Unknown=0, NotChecked=0, Total=930 [2021-11-09 08:39:05,466 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 156 [2021-11-09 08:39:05,469 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 354 transitions, 4248 flow. Second operand has 31 states, 31 states have (on average 81.48387096774194) internal successors, (2526), 31 states have internal predecessors, (2526), 0 states have call successors, (0), 0 states 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 08:39:05,469 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 08:39:05,470 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 156 [2021-11-09 08:39:05,470 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 08:39:08,926 INFO L129 PetriNetUnfolder]: 3175/5765 cut-off events. [2021-11-09 08:39:08,926 INFO L130 PetriNetUnfolder]: For 24337/24356 co-relation queries the response was YES. [2021-11-09 08:39:08,963 INFO L84 FinitePrefix]: Finished finitePrefix Result has 23298 conditions, 5765 events. 3175/5765 cut-off events. For 24337/24356 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 42087 event pairs, 463 based on Foata normal form. 35/5764 useless extension candidates. Maximal degree in co-relation 23220. Up to 1589 conditions per place. [2021-11-09 08:39:08,982 INFO L132 encePairwiseOnDemand]: 125/156 looper letters, 277 selfloop transitions, 189 changer transitions 3/541 dead transitions. [2021-11-09 08:39:08,982 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 541 transitions, 6187 flow [2021-11-09 08:39:08,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-09 08:39:08,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2021-11-09 08:39:08,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 3466 transitions. [2021-11-09 08:39:08,988 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.555448717948718 [2021-11-09 08:39:08,989 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 3466 transitions. [2021-11-09 08:39:08,989 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 3466 transitions. [2021-11-09 08:39:08,990 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 08:39:08,990 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 3466 transitions. [2021-11-09 08:39:08,995 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 86.65) internal successors, (3466), 40 states have internal predecessors, (3466), 0 states have call successors, (0), 0 states 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 08:39:09,003 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 156.0) internal successors, (6396), 41 states have internal predecessors, (6396), 0 states have call successors, (0), 0 states 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 08:39:09,004 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 156.0) internal successors, (6396), 41 states have internal predecessors, (6396), 0 states have call successors, (0), 0 states 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 08:39:09,005 INFO L186 Difference]: Start difference. First operand has 333 places, 354 transitions, 4248 flow. Second operand 40 states and 3466 transitions. [2021-11-09 08:39:09,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 541 transitions, 6187 flow [2021-11-09 08:39:09,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 541 transitions, 5964 flow, removed 32 selfloop flow, removed 26 redundant places. [2021-11-09 08:39:09,149 INFO L242 Difference]: Finished difference. Result has 347 places, 358 transitions, 4521 flow [2021-11-09 08:39:09,149 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=4048, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=4521, PETRI_PLACES=347, PETRI_TRANSITIONS=358} [2021-11-09 08:39:09,149 INFO L334 CegarLoopForPetriNet]: 138 programPoint places, 209 predicate places. [2021-11-09 08:39:09,150 INFO L470 AbstractCegarLoop]: Abstraction has has 347 places, 358 transitions, 4521 flow [2021-11-09 08:39:09,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 81.48387096774194) internal successors, (2526), 31 states have internal predecessors, (2526), 0 states have call successors, (0), 0 states 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 08:39:09,150 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 08:39:09,151 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:39:09,185 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ea6955-a048-4d68-840e-d43066125d28/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-11-09 08:39:09,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ea6955-a048-4d68-840e-d43066125d28/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-09 08:39:09,368 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 08:39:09,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:39:09,368 INFO L85 PathProgramCache]: Analyzing trace with hash -401828936, now seen corresponding path program 4 times [2021-11-09 08:39:09,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:39:09,368 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306038422] [2021-11-09 08:39:09,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:39:09,369 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:39:09,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:39:09,864 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-09 08:39:09,864 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:39:09,864 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306038422] [2021-11-09 08:39:09,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306038422] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:39:09,864 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:39:09,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-09 08:39:09,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514360194] [2021-11-09 08:39:09,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-09 08:39:09,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:39:09,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-09 08:39:09,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-11-09 08:39:09,868 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 156 [2021-11-09 08:39:09,869 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 358 transitions, 4521 flow. Second operand has 19 states, 19 states have (on average 90.57894736842105) internal successors, (1721), 19 states have internal predecessors, (1721), 0 states have call successors, (0), 0 states 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 08:39:09,869 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 08:39:09,869 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 156 [2021-11-09 08:39:09,869 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 08:39:11,789 INFO L129 PetriNetUnfolder]: 3229/5901 cut-off events. [2021-11-09 08:39:11,789 INFO L130 PetriNetUnfolder]: For 31160/31179 co-relation queries the response was YES. [2021-11-09 08:39:11,835 INFO L84 FinitePrefix]: Finished finitePrefix Result has 25354 conditions, 5901 events. 3229/5901 cut-off events. For 31160/31179 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 43421 event pairs, 1076 based on Foata normal form. 16/5862 useless extension candidates. Maximal degree in co-relation 25280. Up to 3095 conditions per place. [2021-11-09 08:39:11,854 INFO L132 encePairwiseOnDemand]: 124/156 looper letters, 221 selfloop transitions, 146 changer transitions 0/445 dead transitions. [2021-11-09 08:39:11,854 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 445 transitions, 5898 flow [2021-11-09 08:39:11,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-09 08:39:11,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-11-09 08:39:11,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 2756 transitions. [2021-11-09 08:39:11,857 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6091954022988506 [2021-11-09 08:39:11,857 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 2756 transitions. [2021-11-09 08:39:11,857 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 2756 transitions. [2021-11-09 08:39:11,858 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 08:39:11,858 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 2756 transitions. [2021-11-09 08:39:11,862 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 95.03448275862068) internal successors, (2756), 29 states have internal predecessors, (2756), 0 states have call successors, (0), 0 states 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 08:39:11,868 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 156.0) internal successors, (4680), 30 states have internal predecessors, (4680), 0 states have call successors, (0), 0 states 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 08:39:11,869 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 156.0) internal successors, (4680), 30 states have internal predecessors, (4680), 0 states have call successors, (0), 0 states 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 08:39:11,869 INFO L186 Difference]: Start difference. First operand has 347 places, 358 transitions, 4521 flow. Second operand 29 states and 2756 transitions. [2021-11-09 08:39:11,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 445 transitions, 5898 flow [2021-11-09 08:39:12,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 445 transitions, 5478 flow, removed 11 selfloop flow, removed 36 redundant places. [2021-11-09 08:39:12,071 INFO L242 Difference]: Finished difference. Result has 345 places, 377 transitions, 4821 flow [2021-11-09 08:39:12,072 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=4152, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=4821, PETRI_PLACES=345, PETRI_TRANSITIONS=377} [2021-11-09 08:39:12,072 INFO L334 CegarLoopForPetriNet]: 138 programPoint places, 207 predicate places. [2021-11-09 08:39:12,072 INFO L470 AbstractCegarLoop]: Abstraction has has 345 places, 377 transitions, 4821 flow [2021-11-09 08:39:12,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 90.57894736842105) internal successors, (1721), 19 states have internal predecessors, (1721), 0 states have call successors, (0), 0 states 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 08:39:12,073 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 08:39:12,073 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:39:12,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-09 08:39:12,073 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 08:39:12,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:39:12,074 INFO L85 PathProgramCache]: Analyzing trace with hash -1682441122, now seen corresponding path program 8 times [2021-11-09 08:39:12,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:39:12,074 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256092875] [2021-11-09 08:39:12,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:39:12,075 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:39:12,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:39:12,534 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-09 08:39:12,534 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:39:12,535 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256092875] [2021-11-09 08:39:12,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256092875] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:39:12,535 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:39:12,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-09 08:39:12,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034034762] [2021-11-09 08:39:12,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-09 08:39:12,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:39:12,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-09 08:39:12,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-11-09 08:39:12,545 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 156 [2021-11-09 08:39:12,546 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 377 transitions, 4821 flow. Second operand has 19 states, 19 states have (on average 90.57894736842105) internal successors, (1721), 19 states have internal predecessors, (1721), 0 states have call successors, (0), 0 states 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 08:39:12,547 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 08:39:12,547 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 156 [2021-11-09 08:39:12,547 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 08:39:14,500 INFO L129 PetriNetUnfolder]: 3272/6004 cut-off events. [2021-11-09 08:39:14,500 INFO L130 PetriNetUnfolder]: For 29651/29670 co-relation queries the response was YES. [2021-11-09 08:39:14,573 INFO L84 FinitePrefix]: Finished finitePrefix Result has 25504 conditions, 6004 events. 3272/6004 cut-off events. For 29651/29670 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 44357 event pairs, 1064 based on Foata normal form. 20/5969 useless extension candidates. Maximal degree in co-relation 25424. Up to 3095 conditions per place. [2021-11-09 08:39:14,598 INFO L132 encePairwiseOnDemand]: 123/156 looper letters, 238 selfloop transitions, 142 changer transitions 5/463 dead transitions. [2021-11-09 08:39:14,599 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 463 transitions, 6324 flow [2021-11-09 08:39:14,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-09 08:39:14,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-11-09 08:39:14,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2471 transitions. [2021-11-09 08:39:14,603 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6092209072978304 [2021-11-09 08:39:14,603 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2471 transitions. [2021-11-09 08:39:14,603 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2471 transitions. [2021-11-09 08:39:14,604 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 08:39:14,604 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2471 transitions. [2021-11-09 08:39:14,607 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 95.03846153846153) internal successors, (2471), 26 states have internal predecessors, (2471), 0 states have call successors, (0), 0 states 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 08:39:14,612 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 156.0) internal successors, (4212), 27 states have internal predecessors, (4212), 0 states have call successors, (0), 0 states 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 08:39:14,613 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 156.0) internal successors, (4212), 27 states have internal predecessors, (4212), 0 states have call successors, (0), 0 states 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 08:39:14,613 INFO L186 Difference]: Start difference. First operand has 345 places, 377 transitions, 4821 flow. Second operand 26 states and 2471 transitions. [2021-11-09 08:39:14,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 463 transitions, 6324 flow [2021-11-09 08:39:14,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 463 transitions, 6210 flow, removed 8 selfloop flow, removed 17 redundant places. [2021-11-09 08:39:14,820 INFO L242 Difference]: Finished difference. Result has 359 places, 396 transitions, 5510 flow [2021-11-09 08:39:14,821 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=4711, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=5510, PETRI_PLACES=359, PETRI_TRANSITIONS=396} [2021-11-09 08:39:14,821 INFO L334 CegarLoopForPetriNet]: 138 programPoint places, 221 predicate places. [2021-11-09 08:39:14,821 INFO L470 AbstractCegarLoop]: Abstraction has has 359 places, 396 transitions, 5510 flow [2021-11-09 08:39:14,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 90.57894736842105) internal successors, (1721), 19 states have internal predecessors, (1721), 0 states have call successors, (0), 0 states 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 08:39:14,821 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 08:39:14,822 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:39:14,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-09 08:39:14,822 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 08:39:14,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:39:14,822 INFO L85 PathProgramCache]: Analyzing trace with hash -152357030, now seen corresponding path program 9 times [2021-11-09 08:39:14,822 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:39:14,823 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132693438] [2021-11-09 08:39:14,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:39:14,823 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:39:14,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:39:15,339 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-09 08:39:15,339 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:39:15,339 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132693438] [2021-11-09 08:39:15,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132693438] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:39:15,340 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:39:15,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-09 08:39:15,340 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850803042] [2021-11-09 08:39:15,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-09 08:39:15,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:39:15,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-09 08:39:15,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-11-09 08:39:15,344 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 156 [2021-11-09 08:39:15,346 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 396 transitions, 5510 flow. Second operand has 19 states, 19 states have (on average 90.57894736842105) internal successors, (1721), 19 states have internal predecessors, (1721), 0 states have call successors, (0), 0 states 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 08:39:15,346 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 08:39:15,346 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 156 [2021-11-09 08:39:15,346 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 08:39:17,710 INFO L129 PetriNetUnfolder]: 3302/6058 cut-off events. [2021-11-09 08:39:17,710 INFO L130 PetriNetUnfolder]: For 33979/33998 co-relation queries the response was YES. [2021-11-09 08:39:17,761 INFO L84 FinitePrefix]: Finished finitePrefix Result has 26494 conditions, 6058 events. 3302/6058 cut-off events. For 33979/33998 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 44822 event pairs, 1082 based on Foata normal form. 16/6018 useless extension candidates. Maximal degree in co-relation 26409. Up to 3095 conditions per place. [2021-11-09 08:39:17,782 INFO L132 encePairwiseOnDemand]: 123/156 looper letters, 228 selfloop transitions, 160 changer transitions 5/471 dead transitions. [2021-11-09 08:39:17,783 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 471 transitions, 6928 flow [2021-11-09 08:39:17,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-09 08:39:17,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-11-09 08:39:17,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2562 transitions. [2021-11-09 08:39:17,785 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6082621082621082 [2021-11-09 08:39:17,785 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2562 transitions. [2021-11-09 08:39:17,786 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2562 transitions. [2021-11-09 08:39:17,787 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 08:39:17,787 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2562 transitions. [2021-11-09 08:39:17,791 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 94.88888888888889) internal successors, (2562), 27 states have internal predecessors, (2562), 0 states have call successors, (0), 0 states 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 08:39:17,795 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 156.0) internal successors, (4368), 28 states have internal predecessors, (4368), 0 states have call successors, (0), 0 states 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 08:39:17,796 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 156.0) internal successors, (4368), 28 states have internal predecessors, (4368), 0 states have call successors, (0), 0 states 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 08:39:17,796 INFO L186 Difference]: Start difference. First operand has 359 places, 396 transitions, 5510 flow. Second operand 27 states and 2562 transitions. [2021-11-09 08:39:17,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 471 transitions, 6928 flow [2021-11-09 08:39:17,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 471 transitions, 6707 flow, removed 1 selfloop flow, removed 20 redundant places. [2021-11-09 08:39:18,001 INFO L242 Difference]: Finished difference. Result has 369 places, 409 transitions, 5996 flow [2021-11-09 08:39:18,001 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=5300, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=5996, PETRI_PLACES=369, PETRI_TRANSITIONS=409} [2021-11-09 08:39:18,002 INFO L334 CegarLoopForPetriNet]: 138 programPoint places, 231 predicate places. [2021-11-09 08:39:18,002 INFO L470 AbstractCegarLoop]: Abstraction has has 369 places, 409 transitions, 5996 flow [2021-11-09 08:39:18,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 90.57894736842105) internal successors, (1721), 19 states have internal predecessors, (1721), 0 states have call successors, (0), 0 states 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 08:39:18,002 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 08:39:18,003 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:39:18,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-09 08:39:18,003 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 08:39:18,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:39:18,003 INFO L85 PathProgramCache]: Analyzing trace with hash -949618688, now seen corresponding path program 5 times [2021-11-09 08:39:18,003 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:39:18,003 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211572294] [2021-11-09 08:39:18,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:39:18,004 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:39:18,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:39:18,484 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-09 08:39:18,484 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:39:18,484 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211572294] [2021-11-09 08:39:18,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211572294] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:39:18,484 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:39:18,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-09 08:39:18,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207904829] [2021-11-09 08:39:18,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-09 08:39:18,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:39:18,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-09 08:39:18,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-11-09 08:39:18,488 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 156 [2021-11-09 08:39:18,489 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 409 transitions, 5996 flow. Second operand has 19 states, 19 states have (on average 90.57894736842105) internal successors, (1721), 19 states have internal predecessors, (1721), 0 states have call successors, (0), 0 states 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 08:39:18,490 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 08:39:18,490 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 156 [2021-11-09 08:39:18,490 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 08:39:20,654 INFO L129 PetriNetUnfolder]: 3295/6021 cut-off events. [2021-11-09 08:39:20,654 INFO L130 PetriNetUnfolder]: For 35439/35458 co-relation queries the response was YES. [2021-11-09 08:39:20,734 INFO L84 FinitePrefix]: Finished finitePrefix Result has 26521 conditions, 6021 events. 3295/6021 cut-off events. For 35439/35458 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 44403 event pairs, 1067 based on Foata normal form. 22/5988 useless extension candidates. Maximal degree in co-relation 26433. Up to 3095 conditions per place. [2021-11-09 08:39:20,762 INFO L132 encePairwiseOnDemand]: 124/156 looper letters, 236 selfloop transitions, 159 changer transitions 2/475 dead transitions. [2021-11-09 08:39:20,763 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 475 transitions, 7057 flow [2021-11-09 08:39:20,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-09 08:39:20,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-11-09 08:39:20,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2478 transitions. [2021-11-09 08:39:20,766 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6109467455621301 [2021-11-09 08:39:20,767 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2478 transitions. [2021-11-09 08:39:20,767 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2478 transitions. [2021-11-09 08:39:20,767 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 08:39:20,768 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2478 transitions. [2021-11-09 08:39:20,771 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 95.3076923076923) internal successors, (2478), 26 states have internal predecessors, (2478), 0 states have call successors, (0), 0 states 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 08:39:20,776 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 156.0) internal successors, (4212), 27 states have internal predecessors, (4212), 0 states have call successors, (0), 0 states 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 08:39:20,777 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 156.0) internal successors, (4212), 27 states have internal predecessors, (4212), 0 states have call successors, (0), 0 states 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 08:39:20,778 INFO L186 Difference]: Start difference. First operand has 369 places, 409 transitions, 5996 flow. Second operand 26 states and 2478 transitions. [2021-11-09 08:39:20,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 475 transitions, 7057 flow [2021-11-09 08:39:21,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 475 transitions, 6814 flow, removed 15 selfloop flow, removed 21 redundant places. [2021-11-09 08:39:21,035 INFO L242 Difference]: Finished difference. Result has 377 places, 409 transitions, 6149 flow [2021-11-09 08:39:21,035 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=5626, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=6149, PETRI_PLACES=377, PETRI_TRANSITIONS=409} [2021-11-09 08:39:21,036 INFO L334 CegarLoopForPetriNet]: 138 programPoint places, 239 predicate places. [2021-11-09 08:39:21,036 INFO L470 AbstractCegarLoop]: Abstraction has has 377 places, 409 transitions, 6149 flow [2021-11-09 08:39:21,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 90.57894736842105) internal successors, (1721), 19 states have internal predecessors, (1721), 0 states have call successors, (0), 0 states 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 08:39:21,037 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 08:39:21,037 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:39:21,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-09 08:39:21,037 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 08:39:21,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:39:21,038 INFO L85 PathProgramCache]: Analyzing trace with hash -806201636, now seen corresponding path program 6 times [2021-11-09 08:39:21,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:39:21,038 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563673612] [2021-11-09 08:39:21,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:39:21,039 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:39:21,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:39:21,564 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-09 08:39:21,564 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:39:21,564 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563673612] [2021-11-09 08:39:21,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563673612] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:39:21,564 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:39:21,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-09 08:39:21,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891845201] [2021-11-09 08:39:21,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-09 08:39:21,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:39:21,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-09 08:39:21,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-11-09 08:39:21,568 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 156 [2021-11-09 08:39:21,570 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 409 transitions, 6149 flow. Second operand has 19 states, 19 states have (on average 90.57894736842105) internal successors, (1721), 19 states have internal predecessors, (1721), 0 states have call successors, (0), 0 states 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 08:39:21,570 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 08:39:21,570 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 156 [2021-11-09 08:39:21,571 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 08:39:23,960 INFO L129 PetriNetUnfolder]: 3311/6043 cut-off events. [2021-11-09 08:39:23,961 INFO L130 PetriNetUnfolder]: For 38115/38134 co-relation queries the response was YES. [2021-11-09 08:39:24,023 INFO L84 FinitePrefix]: Finished finitePrefix Result has 27124 conditions, 6043 events. 3311/6043 cut-off events. For 38115/38134 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 44477 event pairs, 1084 based on Foata normal form. 18/6006 useless extension candidates. Maximal degree in co-relation 27033. Up to 3095 conditions per place. [2021-11-09 08:39:24,044 INFO L132 encePairwiseOnDemand]: 123/156 looper letters, 226 selfloop transitions, 175 changer transitions 1/480 dead transitions. [2021-11-09 08:39:24,044 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 480 transitions, 7458 flow [2021-11-09 08:39:24,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-09 08:39:24,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-11-09 08:39:24,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2579 transitions. [2021-11-09 08:39:24,046 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.612298195631529 [2021-11-09 08:39:24,046 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2579 transitions. [2021-11-09 08:39:24,046 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2579 transitions. [2021-11-09 08:39:24,047 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 08:39:24,048 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2579 transitions. [2021-11-09 08:39:24,052 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 95.51851851851852) internal successors, (2579), 27 states have internal predecessors, (2579), 0 states have call successors, (0), 0 states 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 08:39:24,056 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 156.0) internal successors, (4368), 28 states have internal predecessors, (4368), 0 states have call successors, (0), 0 states 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 08:39:24,057 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 156.0) internal successors, (4368), 28 states have internal predecessors, (4368), 0 states have call successors, (0), 0 states 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 08:39:24,057 INFO L186 Difference]: Start difference. First operand has 377 places, 409 transitions, 6149 flow. Second operand 27 states and 2579 transitions. [2021-11-09 08:39:24,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 480 transitions, 7458 flow [2021-11-09 08:39:24,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 480 transitions, 7243 flow, removed 2 selfloop flow, removed 19 redundant places. [2021-11-09 08:39:24,290 INFO L242 Difference]: Finished difference. Result has 391 places, 421 transitions, 6727 flow [2021-11-09 08:39:24,291 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=5939, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=409, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=6727, PETRI_PLACES=391, PETRI_TRANSITIONS=421} [2021-11-09 08:39:24,291 INFO L334 CegarLoopForPetriNet]: 138 programPoint places, 253 predicate places. [2021-11-09 08:39:24,291 INFO L470 AbstractCegarLoop]: Abstraction has has 391 places, 421 transitions, 6727 flow [2021-11-09 08:39:24,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 90.57894736842105) internal successors, (1721), 19 states have internal predecessors, (1721), 0 states have call successors, (0), 0 states 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 08:39:24,291 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 08:39:24,291 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:39:24,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-09 08:39:24,292 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 08:39:24,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:39:24,292 INFO L85 PathProgramCache]: Analyzing trace with hash -496797426, now seen corresponding path program 7 times [2021-11-09 08:39:24,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:39:24,293 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328870278] [2021-11-09 08:39:24,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:39:24,293 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:39:24,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:39:25,054 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-09 08:39:25,054 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:39:25,055 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328870278] [2021-11-09 08:39:25,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328870278] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:39:25,055 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:39:25,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-11-09 08:39:25,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543225748] [2021-11-09 08:39:25,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-09 08:39:25,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:39:25,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-09 08:39:25,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2021-11-09 08:39:25,059 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 156 [2021-11-09 08:39:25,060 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 421 transitions, 6727 flow. Second operand has 21 states, 21 states have (on average 81.61904761904762) internal successors, (1714), 21 states have internal predecessors, (1714), 0 states have call successors, (0), 0 states 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 08:39:25,061 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 08:39:25,061 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 156 [2021-11-09 08:39:25,061 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 08:39:27,665 INFO L129 PetriNetUnfolder]: 3368/6116 cut-off events. [2021-11-09 08:39:27,665 INFO L130 PetriNetUnfolder]: For 40604/40623 co-relation queries the response was YES. [2021-11-09 08:39:27,743 INFO L84 FinitePrefix]: Finished finitePrefix Result has 28236 conditions, 6116 events. 3368/6116 cut-off events. For 40604/40623 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 44874 event pairs, 1072 based on Foata normal form. 22/6085 useless extension candidates. Maximal degree in co-relation 28138. Up to 3099 conditions per place. [2021-11-09 08:39:27,779 INFO L132 encePairwiseOnDemand]: 123/156 looper letters, 240 selfloop transitions, 197 changer transitions 1/510 dead transitions. [2021-11-09 08:39:27,779 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 510 transitions, 8341 flow [2021-11-09 08:39:27,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-09 08:39:27,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-11-09 08:39:27,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2239 transitions. [2021-11-09 08:39:27,784 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5520216962524654 [2021-11-09 08:39:27,784 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2239 transitions. [2021-11-09 08:39:27,784 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2239 transitions. [2021-11-09 08:39:27,785 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 08:39:27,786 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2239 transitions. [2021-11-09 08:39:27,790 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 86.11538461538461) internal successors, (2239), 26 states have internal predecessors, (2239), 0 states have call successors, (0), 0 states 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 08:39:27,795 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 156.0) internal successors, (4212), 27 states have internal predecessors, (4212), 0 states have call successors, (0), 0 states 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 08:39:27,796 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 156.0) internal successors, (4212), 27 states have internal predecessors, (4212), 0 states have call successors, (0), 0 states 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 08:39:27,796 INFO L186 Difference]: Start difference. First operand has 391 places, 421 transitions, 6727 flow. Second operand 26 states and 2239 transitions. [2021-11-09 08:39:27,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 510 transitions, 8341 flow [2021-11-09 08:39:28,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 510 transitions, 8092 flow, removed 16 selfloop flow, removed 19 redundant places. [2021-11-09 08:39:28,095 INFO L242 Difference]: Finished difference. Result has 403 places, 445 transitions, 7492 flow [2021-11-09 08:39:28,095 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=6498, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=7492, PETRI_PLACES=403, PETRI_TRANSITIONS=445} [2021-11-09 08:39:28,095 INFO L334 CegarLoopForPetriNet]: 138 programPoint places, 265 predicate places. [2021-11-09 08:39:28,096 INFO L470 AbstractCegarLoop]: Abstraction has has 403 places, 445 transitions, 7492 flow [2021-11-09 08:39:28,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 81.61904761904762) internal successors, (1714), 21 states have internal predecessors, (1714), 0 states have call successors, (0), 0 states 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 08:39:28,096 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 08:39:28,096 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:39:28,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-09 08:39:28,097 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 08:39:28,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:39:28,097 INFO L85 PathProgramCache]: Analyzing trace with hash 528841394, now seen corresponding path program 8 times [2021-11-09 08:39:28,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:39:28,098 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193672356] [2021-11-09 08:39:28,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:39:28,098 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:39:28,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:39:28,629 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-09 08:39:28,629 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:39:28,629 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193672356] [2021-11-09 08:39:28,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193672356] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:39:28,630 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:39:28,630 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-09 08:39:28,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448794788] [2021-11-09 08:39:28,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-09 08:39:28,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:39:28,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-09 08:39:28,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2021-11-09 08:39:28,633 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 156 [2021-11-09 08:39:28,635 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 445 transitions, 7492 flow. Second operand has 19 states, 19 states have (on average 90.57894736842105) internal successors, (1721), 19 states have internal predecessors, (1721), 0 states have call successors, (0), 0 states 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 08:39:28,635 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 08:39:28,635 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 156 [2021-11-09 08:39:28,636 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 08:39:31,068 INFO L129 PetriNetUnfolder]: 3384/6194 cut-off events. [2021-11-09 08:39:31,068 INFO L130 PetriNetUnfolder]: For 44896/44915 co-relation queries the response was YES. [2021-11-09 08:39:31,144 INFO L84 FinitePrefix]: Finished finitePrefix Result has 29164 conditions, 6194 events. 3384/6194 cut-off events. For 44896/44915 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 45994 event pairs, 1107 based on Foata normal form. 13/6151 useless extension candidates. Maximal degree in co-relation 29061. Up to 3095 conditions per place. [2021-11-09 08:39:31,167 INFO L132 encePairwiseOnDemand]: 124/156 looper letters, 269 selfloop transitions, 153 changer transitions 10/510 dead transitions. [2021-11-09 08:39:31,167 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 510 transitions, 8715 flow [2021-11-09 08:39:31,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-09 08:39:31,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-11-09 08:39:31,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2549 transitions. [2021-11-09 08:39:31,170 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6051756885090218 [2021-11-09 08:39:31,170 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2549 transitions. [2021-11-09 08:39:31,171 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2549 transitions. [2021-11-09 08:39:31,171 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 08:39:31,171 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2549 transitions. [2021-11-09 08:39:31,175 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 94.4074074074074) internal successors, (2549), 27 states have internal predecessors, (2549), 0 states have call successors, (0), 0 states 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 08:39:31,179 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 156.0) internal successors, (4368), 28 states have internal predecessors, (4368), 0 states have call successors, (0), 0 states 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 08:39:31,180 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 156.0) internal successors, (4368), 28 states have internal predecessors, (4368), 0 states have call successors, (0), 0 states 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 08:39:31,180 INFO L186 Difference]: Start difference. First operand has 403 places, 445 transitions, 7492 flow. Second operand 27 states and 2549 transitions. [2021-11-09 08:39:31,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 510 transitions, 8715 flow [2021-11-09 08:39:31,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 510 transitions, 8492 flow, removed 9 selfloop flow, removed 19 redundant places. [2021-11-09 08:39:31,475 INFO L242 Difference]: Finished difference. Result has 412 places, 443 transitions, 7532 flow [2021-11-09 08:39:31,476 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=7270, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=445, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=7532, PETRI_PLACES=412, PETRI_TRANSITIONS=443} [2021-11-09 08:39:31,476 INFO L334 CegarLoopForPetriNet]: 138 programPoint places, 274 predicate places. [2021-11-09 08:39:31,476 INFO L470 AbstractCegarLoop]: Abstraction has has 412 places, 443 transitions, 7532 flow [2021-11-09 08:39:31,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 90.57894736842105) internal successors, (1721), 19 states have internal predecessors, (1721), 0 states have call successors, (0), 0 states 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 08:39:31,476 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 08:39:31,477 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:39:31,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-09 08:39:31,477 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 08:39:31,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:39:31,478 INFO L85 PathProgramCache]: Analyzing trace with hash -1079390122, now seen corresponding path program 10 times [2021-11-09 08:39:31,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:39:31,478 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766038784] [2021-11-09 08:39:31,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:39:31,478 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:39:31,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:39:31,990 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-09 08:39:31,990 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:39:31,990 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766038784] [2021-11-09 08:39:31,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766038784] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:39:31,991 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:39:31,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-09 08:39:31,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510027436] [2021-11-09 08:39:31,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-09 08:39:31,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:39:31,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-09 08:39:31,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2021-11-09 08:39:31,994 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 156 [2021-11-09 08:39:31,996 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 443 transitions, 7532 flow. Second operand has 20 states, 20 states have (on average 90.45) internal successors, (1809), 20 states have internal predecessors, (1809), 0 states have call successors, (0), 0 states 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 08:39:31,996 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 08:39:31,996 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 156 [2021-11-09 08:39:31,996 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 08:39:34,688 INFO L129 PetriNetUnfolder]: 3702/6727 cut-off events. [2021-11-09 08:39:34,688 INFO L130 PetriNetUnfolder]: For 50355/50374 co-relation queries the response was YES. [2021-11-09 08:39:34,793 INFO L84 FinitePrefix]: Finished finitePrefix Result has 31576 conditions, 6727 events. 3702/6727 cut-off events. For 50355/50374 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 50623 event pairs, 1103 based on Foata normal form. 37/6710 useless extension candidates. Maximal degree in co-relation 31471. Up to 3107 conditions per place. [2021-11-09 08:39:34,827 INFO L132 encePairwiseOnDemand]: 124/156 looper letters, 285 selfloop transitions, 208 changer transitions 0/571 dead transitions. [2021-11-09 08:39:34,828 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 571 transitions, 9372 flow [2021-11-09 08:39:34,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-09 08:39:34,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-11-09 08:39:34,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 3060 transitions. [2021-11-09 08:39:34,833 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6129807692307693 [2021-11-09 08:39:34,833 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 3060 transitions. [2021-11-09 08:39:34,834 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 3060 transitions. [2021-11-09 08:39:34,835 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 08:39:34,835 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 3060 transitions. [2021-11-09 08:39:34,840 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 95.625) internal successors, (3060), 32 states have internal predecessors, (3060), 0 states have call successors, (0), 0 states 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 08:39:34,844 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 156.0) internal successors, (5148), 33 states have internal predecessors, (5148), 0 states have call successors, (0), 0 states 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 08:39:34,844 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 156.0) internal successors, (5148), 33 states have internal predecessors, (5148), 0 states have call successors, (0), 0 states 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 08:39:34,844 INFO L186 Difference]: Start difference. First operand has 412 places, 443 transitions, 7532 flow. Second operand 32 states and 3060 transitions. [2021-11-09 08:39:34,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 571 transitions, 9372 flow [2021-11-09 08:39:35,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 571 transitions, 9184 flow, removed 7 selfloop flow, removed 24 redundant places. [2021-11-09 08:39:35,183 INFO L242 Difference]: Finished difference. Result has 421 places, 462 transitions, 8159 flow [2021-11-09 08:39:35,184 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=7356, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=443, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=192, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=8159, PETRI_PLACES=421, PETRI_TRANSITIONS=462} [2021-11-09 08:39:35,184 INFO L334 CegarLoopForPetriNet]: 138 programPoint places, 283 predicate places. [2021-11-09 08:39:35,184 INFO L470 AbstractCegarLoop]: Abstraction has has 421 places, 462 transitions, 8159 flow [2021-11-09 08:39:35,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 90.45) internal successors, (1809), 20 states have internal predecessors, (1809), 0 states have call successors, (0), 0 states 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 08:39:35,185 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 08:39:35,185 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:39:35,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-11-09 08:39:35,185 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 08:39:35,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:39:35,186 INFO L85 PathProgramCache]: Analyzing trace with hash -1218706338, now seen corresponding path program 11 times [2021-11-09 08:39:35,186 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:39:35,186 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440877880] [2021-11-09 08:39:35,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:39:35,186 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:39:35,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:39:35,700 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-09 08:39:35,700 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:39:35,700 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440877880] [2021-11-09 08:39:35,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440877880] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:39:35,701 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:39:35,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-09 08:39:35,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634454265] [2021-11-09 08:39:35,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-09 08:39:35,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:39:35,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-09 08:39:35,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-11-09 08:39:35,704 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 156 [2021-11-09 08:39:35,706 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 421 places, 462 transitions, 8159 flow. Second operand has 19 states, 19 states have (on average 90.57894736842105) internal successors, (1721), 19 states have internal predecessors, (1721), 0 states have call successors, (0), 0 states 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 08:39:35,706 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 08:39:35,706 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 156 [2021-11-09 08:39:35,707 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 08:39:38,269 INFO L129 PetriNetUnfolder]: 3687/6728 cut-off events. [2021-11-09 08:39:38,269 INFO L130 PetriNetUnfolder]: For 55542/55561 co-relation queries the response was YES. [2021-11-09 08:39:38,336 INFO L84 FinitePrefix]: Finished finitePrefix Result has 32583 conditions, 6728 events. 3687/6728 cut-off events. For 55542/55561 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 50883 event pairs, 1168 based on Foata normal form. 14/6685 useless extension candidates. Maximal degree in co-relation 32475. Up to 3539 conditions per place. [2021-11-09 08:39:38,360 INFO L132 encePairwiseOnDemand]: 125/156 looper letters, 242 selfloop transitions, 197 changer transitions 0/517 dead transitions. [2021-11-09 08:39:38,360 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 517 transitions, 9246 flow [2021-11-09 08:39:38,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-09 08:39:38,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-11-09 08:39:38,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2465 transitions. [2021-11-09 08:39:38,363 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6077416173570019 [2021-11-09 08:39:38,364 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2465 transitions. [2021-11-09 08:39:38,364 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2465 transitions. [2021-11-09 08:39:38,364 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 08:39:38,365 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2465 transitions. [2021-11-09 08:39:38,368 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 94.8076923076923) internal successors, (2465), 26 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states 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 08:39:38,371 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 156.0) internal successors, (4212), 27 states have internal predecessors, (4212), 0 states have call successors, (0), 0 states 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 08:39:38,372 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 156.0) internal successors, (4212), 27 states have internal predecessors, (4212), 0 states have call successors, (0), 0 states 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 08:39:38,372 INFO L186 Difference]: Start difference. First operand has 421 places, 462 transitions, 8159 flow. Second operand 26 states and 2465 transitions. [2021-11-09 08:39:38,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 517 transitions, 9246 flow [2021-11-09 08:39:38,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 517 transitions, 9110 flow, removed 15 selfloop flow, removed 19 redundant places. [2021-11-09 08:39:38,726 INFO L242 Difference]: Finished difference. Result has 428 places, 460 transitions, 8413 flow [2021-11-09 08:39:38,726 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=7971, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=197, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=8413, PETRI_PLACES=428, PETRI_TRANSITIONS=460} [2021-11-09 08:39:38,726 INFO L334 CegarLoopForPetriNet]: 138 programPoint places, 290 predicate places. [2021-11-09 08:39:38,726 INFO L470 AbstractCegarLoop]: Abstraction has has 428 places, 460 transitions, 8413 flow [2021-11-09 08:39:38,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 90.57894736842105) internal successors, (1721), 19 states have internal predecessors, (1721), 0 states have call successors, (0), 0 states 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 08:39:38,727 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 08:39:38,727 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:39:38,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-11-09 08:39:38,727 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 08:39:38,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:39:38,727 INFO L85 PathProgramCache]: Analyzing trace with hash 638490688, now seen corresponding path program 9 times [2021-11-09 08:39:38,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:39:38,728 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489208476] [2021-11-09 08:39:38,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:39:38,728 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:39:38,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:39:39,213 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-09 08:39:39,213 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:39:39,213 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489208476] [2021-11-09 08:39:39,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489208476] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:39:39,213 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:39:39,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-09 08:39:39,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524331517] [2021-11-09 08:39:39,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-09 08:39:39,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:39:39,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-09 08:39:39,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-11-09 08:39:39,216 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 156 [2021-11-09 08:39:39,218 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 460 transitions, 8413 flow. Second operand has 19 states, 19 states have (on average 90.57894736842105) internal successors, (1721), 19 states have internal predecessors, (1721), 0 states have call successors, (0), 0 states 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 08:39:39,218 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 08:39:39,218 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 156 [2021-11-09 08:39:39,218 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 08:39:41,846 INFO L129 PetriNetUnfolder]: 3677/6746 cut-off events. [2021-11-09 08:39:41,846 INFO L130 PetriNetUnfolder]: For 59312/59331 co-relation queries the response was YES. [2021-11-09 08:39:41,928 INFO L84 FinitePrefix]: Finished finitePrefix Result has 32880 conditions, 6746 events. 3677/6746 cut-off events. For 59312/59331 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 51237 event pairs, 1254 based on Foata normal form. 13/6696 useless extension candidates. Maximal degree in co-relation 32772. Up to 3539 conditions per place. [2021-11-09 08:39:41,958 INFO L132 encePairwiseOnDemand]: 124/156 looper letters, 273 selfloop transitions, 158 changer transitions 6/515 dead transitions. [2021-11-09 08:39:41,958 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 452 places, 515 transitions, 9511 flow [2021-11-09 08:39:41,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-09 08:39:41,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-11-09 08:39:41,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 2366 transitions. [2021-11-09 08:39:41,961 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6066666666666667 [2021-11-09 08:39:41,962 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 2366 transitions. [2021-11-09 08:39:41,962 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 2366 transitions. [2021-11-09 08:39:41,962 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 08:39:41,963 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 2366 transitions. [2021-11-09 08:39:41,967 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 94.64) internal successors, (2366), 25 states have internal predecessors, (2366), 0 states have call successors, (0), 0 states 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 08:39:41,970 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 156.0) internal successors, (4056), 26 states have internal predecessors, (4056), 0 states have call successors, (0), 0 states 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 08:39:41,971 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 156.0) internal successors, (4056), 26 states have internal predecessors, (4056), 0 states have call successors, (0), 0 states 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 08:39:41,971 INFO L186 Difference]: Start difference. First operand has 428 places, 460 transitions, 8413 flow. Second operand 25 states and 2366 transitions. [2021-11-09 08:39:41,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 452 places, 515 transitions, 9511 flow [2021-11-09 08:39:42,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 515 transitions, 9345 flow, removed 1 selfloop flow, removed 22 redundant places. [2021-11-09 08:39:42,334 INFO L242 Difference]: Finished difference. Result has 431 places, 457 transitions, 8485 flow [2021-11-09 08:39:42,334 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=8217, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=8485, PETRI_PLACES=431, PETRI_TRANSITIONS=457} [2021-11-09 08:39:42,335 INFO L334 CegarLoopForPetriNet]: 138 programPoint places, 293 predicate places. [2021-11-09 08:39:42,335 INFO L470 AbstractCegarLoop]: Abstraction has has 431 places, 457 transitions, 8485 flow [2021-11-09 08:39:42,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 90.57894736842105) internal successors, (1721), 19 states have internal predecessors, (1721), 0 states have call successors, (0), 0 states 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 08:39:42,335 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 08:39:42,335 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:39:42,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-11-09 08:39:42,335 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 08:39:42,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:39:42,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1624046016, now seen corresponding path program 12 times [2021-11-09 08:39:42,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:39:42,336 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215585094] [2021-11-09 08:39:42,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:39:42,336 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:39:42,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:39:42,823 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-09 08:39:42,824 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:39:42,824 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215585094] [2021-11-09 08:39:42,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215585094] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:39:42,824 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141227799] [2021-11-09 08:39:42,824 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 08:39:42,825 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:39:42,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ea6955-a048-4d68-840e-d43066125d28/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:39:42,832 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ea6955-a048-4d68-840e-d43066125d28/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:39:42,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ea6955-a048-4d68-840e-d43066125d28/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-09 08:39:43,432 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-11-09 08:39:43,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:39:43,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-09 08:39:43,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:39:44,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-09 08:39:45,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-09 08:39:45,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-09 08:39:45,368 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 08:39:45,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 25 [2021-11-09 08:39:45,462 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 08:39:45,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141227799] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:39:45,463 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:39:45,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 24] total 39 [2021-11-09 08:39:45,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365124076] [2021-11-09 08:39:45,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-09 08:39:45,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:39:45,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-09 08:39:45,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1298, Unknown=0, NotChecked=0, Total=1482 [2021-11-09 08:39:45,468 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 156 [2021-11-09 08:39:45,470 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 457 transitions, 8485 flow. Second operand has 39 states, 39 states have (on average 71.94871794871794) internal successors, (2806), 39 states have internal predecessors, (2806), 0 states have call successors, (0), 0 states 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 08:39:45,471 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 08:39:45,471 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 156 [2021-11-09 08:39:45,471 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 08:39:49,155 INFO L129 PetriNetUnfolder]: 3651/6656 cut-off events. [2021-11-09 08:39:49,156 INFO L130 PetriNetUnfolder]: For 62845/62864 co-relation queries the response was YES. [2021-11-09 08:39:49,276 INFO L84 FinitePrefix]: Finished finitePrefix Result has 32932 conditions, 6656 events. 3651/6656 cut-off events. For 62845/62864 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 50216 event pairs, 943 based on Foata normal form. 31/6637 useless extension candidates. Maximal degree in co-relation 32824. Up to 2853 conditions per place. [2021-11-09 08:39:49,305 INFO L132 encePairwiseOnDemand]: 121/156 looper letters, 282 selfloop transitions, 218 changer transitions 0/559 dead transitions. [2021-11-09 08:39:49,305 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 461 places, 559 transitions, 9988 flow [2021-11-09 08:39:49,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-09 08:39:49,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-11-09 08:39:49,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 2583 transitions. [2021-11-09 08:39:49,307 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.48699095022624433 [2021-11-09 08:39:49,308 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 2583 transitions. [2021-11-09 08:39:49,308 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 2583 transitions. [2021-11-09 08:39:49,308 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 08:39:49,308 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 2583 transitions. [2021-11-09 08:39:49,312 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 75.97058823529412) internal successors, (2583), 34 states have internal predecessors, (2583), 0 states have call successors, (0), 0 states 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 08:39:49,317 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 156.0) internal successors, (5460), 35 states have internal predecessors, (5460), 0 states have call successors, (0), 0 states 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 08:39:49,318 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 156.0) internal successors, (5460), 35 states have internal predecessors, (5460), 0 states have call successors, (0), 0 states 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 08:39:49,319 INFO L186 Difference]: Start difference. First operand has 431 places, 457 transitions, 8485 flow. Second operand 34 states and 2583 transitions. [2021-11-09 08:39:49,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 461 places, 559 transitions, 9988 flow [2021-11-09 08:39:49,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 559 transitions, 9574 flow, removed 7 selfloop flow, removed 28 redundant places. [2021-11-09 08:39:49,714 INFO L242 Difference]: Finished difference. Result has 434 places, 457 transitions, 8533 flow [2021-11-09 08:39:49,715 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=8071, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=456, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=217, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=8533, PETRI_PLACES=434, PETRI_TRANSITIONS=457} [2021-11-09 08:39:49,715 INFO L334 CegarLoopForPetriNet]: 138 programPoint places, 296 predicate places. [2021-11-09 08:39:49,715 INFO L470 AbstractCegarLoop]: Abstraction has has 434 places, 457 transitions, 8533 flow [2021-11-09 08:39:49,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 71.94871794871794) internal successors, (2806), 39 states have internal predecessors, (2806), 0 states have call successors, (0), 0 states 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 08:39:49,716 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 08:39:49,717 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:39:49,742 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ea6955-a048-4d68-840e-d43066125d28/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-09 08:39:49,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ea6955-a048-4d68-840e-d43066125d28/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-09 08:39:49,920 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 08:39:49,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:39:49,920 INFO L85 PathProgramCache]: Analyzing trace with hash -1229619860, now seen corresponding path program 13 times [2021-11-09 08:39:49,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:39:49,920 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807065915] [2021-11-09 08:39:49,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:39:49,920 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:39:49,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:39:50,611 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-09 08:39:50,611 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:39:50,611 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807065915] [2021-11-09 08:39:50,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807065915] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:39:50,611 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:39:50,612 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-11-09 08:39:50,612 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206601246] [2021-11-09 08:39:50,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-09 08:39:50,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:39:50,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-09 08:39:50,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2021-11-09 08:39:50,615 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 156 [2021-11-09 08:39:50,617 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 457 transitions, 8533 flow. Second operand has 21 states, 21 states have (on average 81.61904761904762) internal successors, (1714), 21 states have internal predecessors, (1714), 0 states have call successors, (0), 0 states 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 08:39:50,617 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 08:39:50,617 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 156 [2021-11-09 08:39:50,617 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 08:39:53,801 INFO L129 PetriNetUnfolder]: 3632/6642 cut-off events. [2021-11-09 08:39:53,801 INFO L130 PetriNetUnfolder]: For 62395/62414 co-relation queries the response was YES. [2021-11-09 08:39:53,918 INFO L84 FinitePrefix]: Finished finitePrefix Result has 33218 conditions, 6642 events. 3632/6642 cut-off events. For 62395/62414 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 50199 event pairs, 1168 based on Foata normal form. 20/6603 useless extension candidates. Maximal degree in co-relation 33112. Up to 3520 conditions per place. [2021-11-09 08:39:53,950 INFO L132 encePairwiseOnDemand]: 123/156 looper letters, 260 selfloop transitions, 177 changer transitions 5/514 dead transitions. [2021-11-09 08:39:53,951 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 514 transitions, 9657 flow [2021-11-09 08:39:53,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-09 08:39:53,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-11-09 08:39:53,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2229 transitions. [2021-11-09 08:39:53,953 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5495562130177515 [2021-11-09 08:39:53,954 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2229 transitions. [2021-11-09 08:39:53,954 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2229 transitions. [2021-11-09 08:39:53,954 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 08:39:53,954 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2229 transitions. [2021-11-09 08:39:53,957 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 85.73076923076923) internal successors, (2229), 26 states have internal predecessors, (2229), 0 states have call successors, (0), 0 states 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 08:39:53,959 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 156.0) internal successors, (4212), 27 states have internal predecessors, (4212), 0 states have call successors, (0), 0 states 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 08:39:53,960 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 156.0) internal successors, (4212), 27 states have internal predecessors, (4212), 0 states have call successors, (0), 0 states 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 08:39:53,960 INFO L186 Difference]: Start difference. First operand has 434 places, 457 transitions, 8533 flow. Second operand 26 states and 2229 transitions. [2021-11-09 08:39:53,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 514 transitions, 9657 flow [2021-11-09 08:39:54,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 514 transitions, 9189 flow, removed 3 selfloop flow, removed 31 redundant places. [2021-11-09 08:39:54,329 INFO L242 Difference]: Finished difference. Result has 431 places, 452 transitions, 8373 flow [2021-11-09 08:39:54,330 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=7948, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=8373, PETRI_PLACES=431, PETRI_TRANSITIONS=452} [2021-11-09 08:39:54,330 INFO L334 CegarLoopForPetriNet]: 138 programPoint places, 293 predicate places. [2021-11-09 08:39:54,330 INFO L470 AbstractCegarLoop]: Abstraction has has 431 places, 452 transitions, 8373 flow [2021-11-09 08:39:54,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 81.61904761904762) internal successors, (1714), 21 states have internal predecessors, (1714), 0 states have call successors, (0), 0 states 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 08:39:54,331 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 08:39:54,331 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:39:54,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-11-09 08:39:54,331 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 08:39:54,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:39:54,332 INFO L85 PathProgramCache]: Analyzing trace with hash -1010073102, now seen corresponding path program 10 times [2021-11-09 08:39:54,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:39:54,332 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974235818] [2021-11-09 08:39:54,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:39:54,332 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:39:54,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:39:54,867 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-09 08:39:54,867 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:39:54,867 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974235818] [2021-11-09 08:39:54,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974235818] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:39:54,867 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822025206] [2021-11-09 08:39:54,868 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 08:39:54,868 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:39:54,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ea6955-a048-4d68-840e-d43066125d28/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:39:54,869 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ea6955-a048-4d68-840e-d43066125d28/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:39:54,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ea6955-a048-4d68-840e-d43066125d28/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-09 08:39:55,517 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 08:39:55,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:39:55,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-09 08:39:55,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:39:56,611 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 08:39:56,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2021-11-09 08:39:56,692 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-09 08:39:56,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822025206] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:39:56,692 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:39:56,693 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 24 [2021-11-09 08:39:56,693 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9679300] [2021-11-09 08:39:56,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-09 08:39:56,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:39:56,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-09 08:39:56,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2021-11-09 08:39:56,696 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 156 [2021-11-09 08:39:56,697 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 452 transitions, 8373 flow. Second operand has 24 states, 24 states have (on average 90.45833333333333) internal successors, (2171), 24 states have internal predecessors, (2171), 0 states have call successors, (0), 0 states 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 08:39:56,697 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 08:39:56,697 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 156 [2021-11-09 08:39:56,697 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 08:39:59,324 INFO L129 PetriNetUnfolder]: 3664/6657 cut-off events. [2021-11-09 08:39:59,324 INFO L130 PetriNetUnfolder]: For 61218/61237 co-relation queries the response was YES. [2021-11-09 08:39:59,399 INFO L84 FinitePrefix]: Finished finitePrefix Result has 33059 conditions, 6657 events. 3664/6657 cut-off events. For 61218/61237 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 50336 event pairs, 1094 based on Foata normal form. 34/6635 useless extension candidates. Maximal degree in co-relation 32950. Up to 3226 conditions per place. [2021-11-09 08:39:59,422 INFO L132 encePairwiseOnDemand]: 125/156 looper letters, 307 selfloop transitions, 183 changer transitions 1/569 dead transitions. [2021-11-09 08:39:59,422 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 458 places, 569 transitions, 10086 flow [2021-11-09 08:39:59,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-09 08:39:59,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-11-09 08:39:59,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 2676 transitions. [2021-11-09 08:39:59,427 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6126373626373627 [2021-11-09 08:39:59,427 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 2676 transitions. [2021-11-09 08:39:59,427 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 2676 transitions. [2021-11-09 08:39:59,427 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 08:39:59,427 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 2676 transitions. [2021-11-09 08:39:59,429 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 95.57142857142857) internal successors, (2676), 28 states have internal predecessors, (2676), 0 states have call successors, (0), 0 states 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 08:39:59,432 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 156.0) internal successors, (4524), 29 states have internal predecessors, (4524), 0 states have call successors, (0), 0 states 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 08:39:59,433 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 156.0) internal successors, (4524), 29 states have internal predecessors, (4524), 0 states have call successors, (0), 0 states 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 08:39:59,433 INFO L186 Difference]: Start difference. First operand has 431 places, 452 transitions, 8373 flow. Second operand 28 states and 2676 transitions. [2021-11-09 08:39:59,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 458 places, 569 transitions, 10086 flow [2021-11-09 08:39:59,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 569 transitions, 9844 flow, removed 2 selfloop flow, removed 20 redundant places. [2021-11-09 08:39:59,799 INFO L242 Difference]: Finished difference. Result has 440 places, 454 transitions, 8559 flow [2021-11-09 08:39:59,800 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=8131, PETRI_DIFFERENCE_MINUEND_PLACES=411, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=181, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=8559, PETRI_PLACES=440, PETRI_TRANSITIONS=454} [2021-11-09 08:39:59,800 INFO L334 CegarLoopForPetriNet]: 138 programPoint places, 302 predicate places. [2021-11-09 08:39:59,801 INFO L470 AbstractCegarLoop]: Abstraction has has 440 places, 454 transitions, 8559 flow [2021-11-09 08:39:59,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 90.45833333333333) internal successors, (2171), 24 states have internal predecessors, (2171), 0 states have call successors, (0), 0 states 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 08:39:59,801 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 08:39:59,801 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:39:59,852 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ea6955-a048-4d68-840e-d43066125d28/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-09 08:40:00,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14ea6955-a048-4d68-840e-d43066125d28/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:40:00,028 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 08:40:00,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:40:00,028 INFO L85 PathProgramCache]: Analyzing trace with hash -274358098, now seen corresponding path program 14 times [2021-11-09 08:40:00,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:40:00,028 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312248891] [2021-11-09 08:40:00,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:40:00,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:40:00,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:40:00,890 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-09 08:40:00,891 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:40:00,891 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312248891] [2021-11-09 08:40:00,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312248891] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:40:00,891 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:40:00,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-11-09 08:40:00,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262068415] [2021-11-09 08:40:01,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-09 08:40:01,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:40:01,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-09 08:40:01,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-11-09 08:40:01,133 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 156 [2021-11-09 08:40:01,134 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 454 transitions, 8559 flow. Second operand has 22 states, 22 states have (on average 81.5) internal successors, (1793), 22 states have internal predecessors, (1793), 0 states have call successors, (0), 0 states 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 08:40:01,134 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 08:40:01,134 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 156 [2021-11-09 08:40:01,135 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand