./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/triangular-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b2eff8ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e43e6a-0a58-4d73-beb2-0deb94959632/bin/uautomizer-UnR33cPsHg/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e43e6a-0a58-4d73-beb2-0deb94959632/bin/uautomizer-UnR33cPsHg/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e43e6a-0a58-4d73-beb2-0deb94959632/bin/uautomizer-UnR33cPsHg/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e43e6a-0a58-4d73-beb2-0deb94959632/bin/uautomizer-UnR33cPsHg/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/triangular-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e43e6a-0a58-4d73-beb2-0deb94959632/bin/uautomizer-UnR33cPsHg/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e43e6a-0a58-4d73-beb2-0deb94959632/bin/uautomizer-UnR33cPsHg --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 b585114ab4aff9777d36c84f93f7abe0931f77338421f004296c8a8d328d3dfd ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-b2eff8b [2021-10-28 09:19:50,731 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-28 09:19:50,735 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-28 09:19:50,799 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-28 09:19:50,800 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-28 09:19:50,805 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-28 09:19:50,807 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-28 09:19:50,812 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-28 09:19:50,815 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-28 09:19:50,822 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-28 09:19:50,824 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-28 09:19:50,826 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-28 09:19:50,827 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-28 09:19:50,830 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-28 09:19:50,833 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-28 09:19:50,838 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-28 09:19:50,840 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-28 09:19:50,842 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-28 09:19:50,845 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-28 09:19:50,854 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-28 09:19:50,856 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-28 09:19:50,858 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-28 09:19:50,862 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-28 09:19:50,863 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-28 09:19:50,873 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-28 09:19:50,874 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-28 09:19:50,874 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-28 09:19:50,877 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-28 09:19:50,878 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-28 09:19:50,879 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-28 09:19:50,880 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-28 09:19:50,881 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-28 09:19:50,883 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-28 09:19:50,885 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-28 09:19:50,887 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-28 09:19:50,887 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-28 09:19:50,888 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-28 09:19:50,889 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-28 09:19:50,889 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-28 09:19:50,890 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-28 09:19:50,891 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-28 09:19:50,892 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e43e6a-0a58-4d73-beb2-0deb94959632/bin/uautomizer-UnR33cPsHg/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-28 09:19:50,947 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-28 09:19:50,947 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-28 09:19:50,948 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-28 09:19:50,948 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-28 09:19:50,951 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-28 09:19:50,951 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-28 09:19:50,951 INFO L138 SettingsManager]: * Use SBE=true [2021-10-28 09:19:50,952 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-28 09:19:50,952 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-28 09:19:50,952 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-28 09:19:50,954 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-28 09:19:50,954 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-28 09:19:50,954 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-28 09:19:50,954 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-28 09:19:50,955 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-28 09:19:50,955 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-28 09:19:50,955 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-28 09:19:50,955 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-28 09:19:50,956 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-28 09:19:50,956 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-28 09:19:50,956 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-28 09:19:50,957 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-28 09:19:50,957 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 09:19:50,957 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-28 09:19:50,958 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-28 09:19:50,958 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-28 09:19:50,958 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-28 09:19:50,958 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-28 09:19:50,959 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-28 09:19:50,960 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-28 09:19:50,968 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-28 09:19:50,969 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-28 09:19:50,969 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_30e43e6a-0a58-4d73-beb2-0deb94959632/bin/uautomizer-UnR33cPsHg/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e43e6a-0a58-4d73-beb2-0deb94959632/bin/uautomizer-UnR33cPsHg Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b585114ab4aff9777d36c84f93f7abe0931f77338421f004296c8a8d328d3dfd [2021-10-28 09:19:51,330 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-28 09:19:51,354 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-28 09:19:51,357 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-28 09:19:51,358 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-28 09:19:51,359 INFO L275 PluginConnector]: CDTParser initialized [2021-10-28 09:19:51,360 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e43e6a-0a58-4d73-beb2-0deb94959632/bin/uautomizer-UnR33cPsHg/../../sv-benchmarks/c/pthread/triangular-1.i [2021-10-28 09:19:51,445 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e43e6a-0a58-4d73-beb2-0deb94959632/bin/uautomizer-UnR33cPsHg/data/7ef19c14c/8093e35ef66e48ccaf6a33833d1c1263/FLAG553d3dd9f [2021-10-28 09:19:52,219 INFO L306 CDTParser]: Found 1 translation units. [2021-10-28 09:19:52,220 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e43e6a-0a58-4d73-beb2-0deb94959632/sv-benchmarks/c/pthread/triangular-1.i [2021-10-28 09:19:52,251 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e43e6a-0a58-4d73-beb2-0deb94959632/bin/uautomizer-UnR33cPsHg/data/7ef19c14c/8093e35ef66e48ccaf6a33833d1c1263/FLAG553d3dd9f [2021-10-28 09:19:52,443 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e43e6a-0a58-4d73-beb2-0deb94959632/bin/uautomizer-UnR33cPsHg/data/7ef19c14c/8093e35ef66e48ccaf6a33833d1c1263 [2021-10-28 09:19:52,446 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-28 09:19:52,447 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-28 09:19:52,449 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-28 09:19:52,449 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-28 09:19:52,455 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-28 09:19:52,456 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:19:52" (1/1) ... [2021-10-28 09:19:52,458 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b3d5006 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:19:52, skipping insertion in model container [2021-10-28 09:19:52,458 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:19:52" (1/1) ... [2021-10-28 09:19:52,467 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-28 09:19:52,539 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-28 09:19:52,915 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_30e43e6a-0a58-4d73-beb2-0deb94959632/sv-benchmarks/c/pthread/triangular-1.i[30950,30963] [2021-10-28 09:19:52,919 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 09:19:52,934 INFO L203 MainTranslator]: Completed pre-run [2021-10-28 09:19:53,019 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_30e43e6a-0a58-4d73-beb2-0deb94959632/sv-benchmarks/c/pthread/triangular-1.i[30950,30963] [2021-10-28 09:19:53,020 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 09:19:53,062 INFO L208 MainTranslator]: Completed translation [2021-10-28 09:19:53,062 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:19:53 WrapperNode [2021-10-28 09:19:53,063 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-28 09:19:53,064 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-28 09:19:53,064 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-28 09:19:53,064 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-28 09:19:53,073 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:19:53" (1/1) ... [2021-10-28 09:19:53,089 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:19:53" (1/1) ... [2021-10-28 09:19:53,113 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-28 09:19:53,113 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-28 09:19:53,114 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-28 09:19:53,114 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-28 09:19:53,128 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:19:53" (1/1) ... [2021-10-28 09:19:53,128 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:19:53" (1/1) ... [2021-10-28 09:19:53,131 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:19:53" (1/1) ... [2021-10-28 09:19:53,132 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:19:53" (1/1) ... [2021-10-28 09:19:53,138 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:19:53" (1/1) ... [2021-10-28 09:19:53,143 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:19:53" (1/1) ... [2021-10-28 09:19:53,145 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:19:53" (1/1) ... [2021-10-28 09:19:53,148 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-28 09:19:53,149 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-28 09:19:53,150 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-28 09:19:53,150 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-28 09:19:53,151 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:19:53" (1/1) ... [2021-10-28 09:19:53,163 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 09:19:53,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e43e6a-0a58-4d73-beb2-0deb94959632/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:19:53,194 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e43e6a-0a58-4d73-beb2-0deb94959632/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-28 09:19:53,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e43e6a-0a58-4d73-beb2-0deb94959632/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-28 09:19:53,248 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2021-10-28 09:19:53,249 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2021-10-28 09:19:53,249 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2021-10-28 09:19:53,249 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2021-10-28 09:19:53,249 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-28 09:19:53,250 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-10-28 09:19:53,250 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-28 09:19:53,250 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-28 09:19:53,250 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-28 09:19:53,250 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-10-28 09:19:53,251 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-28 09:19:53,252 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-28 09:19:53,254 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-10-28 09:19:53,679 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-28 09:19:53,679 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-10-28 09:19:53,681 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:19:53 BoogieIcfgContainer [2021-10-28 09:19:53,682 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-28 09:19:53,684 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-28 09:19:53,684 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-28 09:19:53,690 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-28 09:19:53,690 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 09:19:52" (1/3) ... [2021-10-28 09:19:53,691 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1376a75f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:19:53, skipping insertion in model container [2021-10-28 09:19:53,692 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:19:53" (2/3) ... [2021-10-28 09:19:53,692 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1376a75f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:19:53, skipping insertion in model container [2021-10-28 09:19:53,692 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:19:53" (3/3) ... [2021-10-28 09:19:53,697 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-1.i [2021-10-28 09:19:53,703 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-10-28 09:19:53,703 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-28 09:19:53,703 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-28 09:19:53,703 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-10-28 09:19:53,751 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 09:19:53,751 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 09:19:53,751 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 09:19:53,751 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 09:19:53,752 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 09:19:53,752 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 09:19:53,752 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 09:19:53,752 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 09:19:53,753 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 09:19:53,753 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 09:19:53,754 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 09:19:53,755 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 09:19:53,755 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 09:19:53,755 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 09:19:53,756 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 09:19:53,756 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 09:19:53,756 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 09:19:53,757 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 09:19:53,758 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 09:19:53,758 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 09:19:53,758 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 09:19:53,759 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 09:19:53,759 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 09:19:53,759 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 09:19:53,760 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 09:19:53,760 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 09:19:53,760 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 09:19:53,761 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 09:19:53,762 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 09:19:53,762 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 09:19:53,764 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 09:19:53,764 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 09:19:53,764 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 09:19:53,764 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 09:19:53,765 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 09:19:53,765 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 09:19:53,765 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 09:19:53,767 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 09:19:53,767 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 09:19:53,768 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 09:19:53,768 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 09:19:53,768 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 09:19:53,768 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 09:19:53,768 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 09:19:53,772 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 09:19:53,772 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 09:19:53,773 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 09:19:53,773 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 09:19:53,773 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 09:19:53,773 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 09:19:53,773 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 09:19:53,773 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 09:19:53,773 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 09:19:53,773 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 09:19:53,776 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 09:19:53,776 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 09:19:53,779 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 09:19:53,779 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 09:19:53,780 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 09:19:53,780 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 09:19:53,780 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 09:19:53,780 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 09:19:53,786 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 09:19:53,792 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 09:19:53,793 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 09:19:53,793 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 09:19:53,793 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 09:19:53,793 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 09:19:53,796 INFO L148 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-10-28 09:19:53,847 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-28 09:19:53,855 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 [2021-10-28 09:19:53,855 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-10-28 09:19:53,869 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 68 places, 66 transitions, 142 flow [2021-10-28 09:19:53,907 INFO L129 PetriNetUnfolder]: 5/64 cut-off events. [2021-10-28 09:19:53,910 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-28 09:19:53,914 INFO L84 FinitePrefix]: Finished finitePrefix Result has 71 conditions, 64 events. 5/64 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 65 event pairs, 0 based on Foata normal form. 0/58 useless extension candidates. Maximal degree in co-relation 46. Up to 2 conditions per place. [2021-10-28 09:19:53,914 INFO L82 GeneralOperation]: Start removeDead. Operand has 68 places, 66 transitions, 142 flow [2021-10-28 09:19:53,921 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 66 places, 64 transitions, 134 flow [2021-10-28 09:19:53,953 INFO L129 PetriNetUnfolder]: 3/52 cut-off events. [2021-10-28 09:19:53,953 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-28 09:19:53,954 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-28 09:19:53,954 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] [2021-10-28 09:19:53,955 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-28 09:19:53,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:19:53,961 INFO L85 PathProgramCache]: Analyzing trace with hash 2112281486, now seen corresponding path program 1 times [2021-10-28 09:19:53,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:19:53,972 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575761993] [2021-10-28 09:19:53,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:19:53,974 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:19:54,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:19:54,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:19:54,532 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:19:54,533 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575761993] [2021-10-28 09:19:54,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575761993] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:19:54,534 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:19:54,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-28 09:19:54,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904117041] [2021-10-28 09:19:54,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 09:19:54,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:19:54,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 09:19:54,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-10-28 09:19:54,570 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-28 09:19:54,574 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 64 transitions, 134 flow. Second operand has 6 states, 6 states have (on average 54.0) internal successors, (324), 6 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:19:54,575 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-28 09:19:54,575 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-28 09:19:54,576 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-28 09:19:54,741 INFO L129 PetriNetUnfolder]: 44/194 cut-off events. [2021-10-28 09:19:54,741 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-28 09:19:54,744 INFO L84 FinitePrefix]: Finished finitePrefix Result has 272 conditions, 194 events. 44/194 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 723 event pairs, 3 based on Foata normal form. 47/223 useless extension candidates. Maximal degree in co-relation 243. Up to 29 conditions per place. [2021-10-28 09:19:54,746 INFO L132 encePairwiseOnDemand]: 55/66 looper letters, 11 selfloop transitions, 9 changer transitions 23/87 dead transitions. [2021-10-28 09:19:54,747 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 87 transitions, 252 flow [2021-10-28 09:19:54,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 09:19:54,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-10-28 09:19:54,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 590 transitions. [2021-10-28 09:19:54,766 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8939393939393939 [2021-10-28 09:19:54,767 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 590 transitions. [2021-10-28 09:19:54,767 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 590 transitions. [2021-10-28 09:19:54,771 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 09:19:54,774 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 590 transitions. [2021-10-28 09:19:54,783 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 59.0) internal successors, (590), 10 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:19:54,792 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 66.0) internal successors, (726), 11 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:19:54,793 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 66.0) internal successors, (726), 11 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:19:54,796 INFO L186 Difference]: Start difference. First operand has 66 places, 64 transitions, 134 flow. Second operand 10 states and 590 transitions. [2021-10-28 09:19:54,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 87 transitions, 252 flow [2021-10-28 09:19:54,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 87 transitions, 250 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-28 09:19:54,805 INFO L242 Difference]: Finished difference. Result has 79 places, 61 transitions, 175 flow [2021-10-28 09:19:54,807 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=175, PETRI_PLACES=79, PETRI_TRANSITIONS=61} [2021-10-28 09:19:54,808 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 13 predicate places. [2021-10-28 09:19:54,809 INFO L470 AbstractCegarLoop]: Abstraction has has 79 places, 61 transitions, 175 flow [2021-10-28 09:19:54,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 54.0) internal successors, (324), 6 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:19:54,809 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-28 09:19:54,810 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] [2021-10-28 09:19:54,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-28 09:19:54,810 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-28 09:19:54,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:19:54,811 INFO L85 PathProgramCache]: Analyzing trace with hash -1447548911, now seen corresponding path program 1 times [2021-10-28 09:19:54,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:19:54,812 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014481333] [2021-10-28 09:19:54,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:19:54,812 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:19:54,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:19:55,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:19:55,003 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:19:55,003 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014481333] [2021-10-28 09:19:55,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014481333] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:19:55,004 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:19:55,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-28 09:19:55,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343814384] [2021-10-28 09:19:55,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 09:19:55,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:19:55,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 09:19:55,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-28 09:19:55,010 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-28 09:19:55,010 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 61 transitions, 175 flow. Second operand has 6 states, 6 states have (on average 54.166666666666664) internal successors, (325), 6 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:19:55,011 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-28 09:19:55,011 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-28 09:19:55,011 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-28 09:19:55,149 INFO L129 PetriNetUnfolder]: 25/130 cut-off events. [2021-10-28 09:19:55,149 INFO L130 PetriNetUnfolder]: For 64/72 co-relation queries the response was YES. [2021-10-28 09:19:55,151 INFO L84 FinitePrefix]: Finished finitePrefix Result has 242 conditions, 130 events. 25/130 cut-off events. For 64/72 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 343 event pairs, 0 based on Foata normal form. 7/124 useless extension candidates. Maximal degree in co-relation 206. Up to 29 conditions per place. [2021-10-28 09:19:55,152 INFO L132 encePairwiseOnDemand]: 60/66 looper letters, 13 selfloop transitions, 9 changer transitions 5/71 dead transitions. [2021-10-28 09:19:55,153 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 71 transitions, 271 flow [2021-10-28 09:19:55,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 09:19:55,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-10-28 09:19:55,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 394 transitions. [2021-10-28 09:19:55,159 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8528138528138528 [2021-10-28 09:19:55,159 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 394 transitions. [2021-10-28 09:19:55,160 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 394 transitions. [2021-10-28 09:19:55,160 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 09:19:55,162 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 394 transitions. [2021-10-28 09:19:55,164 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 56.285714285714285) internal successors, (394), 7 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:19:55,166 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 66.0) internal successors, (528), 8 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:19:55,168 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 66.0) internal successors, (528), 8 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:19:55,168 INFO L186 Difference]: Start difference. First operand has 79 places, 61 transitions, 175 flow. Second operand 7 states and 394 transitions. [2021-10-28 09:19:55,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 71 transitions, 271 flow [2021-10-28 09:19:55,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 71 transitions, 263 flow, removed 4 selfloop flow, removed 4 redundant places. [2021-10-28 09:19:55,178 INFO L242 Difference]: Finished difference. Result has 73 places, 64 transitions, 214 flow [2021-10-28 09:19:55,179 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=167, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=214, PETRI_PLACES=73, PETRI_TRANSITIONS=64} [2021-10-28 09:19:55,179 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 7 predicate places. [2021-10-28 09:19:55,180 INFO L470 AbstractCegarLoop]: Abstraction has has 73 places, 64 transitions, 214 flow [2021-10-28 09:19:55,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 54.166666666666664) internal successors, (325), 6 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:19:55,181 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-28 09:19:55,181 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] [2021-10-28 09:19:55,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-28 09:19:55,182 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-28 09:19:55,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:19:55,183 INFO L85 PathProgramCache]: Analyzing trace with hash 263941995, now seen corresponding path program 1 times [2021-10-28 09:19:55,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:19:55,184 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174591154] [2021-10-28 09:19:55,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:19:55,185 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:19:55,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:19:55,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:19:55,408 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:19:55,408 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174591154] [2021-10-28 09:19:55,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174591154] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:19:55,409 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:19:55,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-28 09:19:55,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328444599] [2021-10-28 09:19:55,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 09:19:55,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:19:55,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 09:19:55,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-10-28 09:19:55,413 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-28 09:19:55,414 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 64 transitions, 214 flow. Second operand has 6 states, 6 states have (on average 54.166666666666664) internal successors, (325), 6 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:19:55,414 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-28 09:19:55,414 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-28 09:19:55,415 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-28 09:19:55,525 INFO L129 PetriNetUnfolder]: 35/182 cut-off events. [2021-10-28 09:19:55,526 INFO L130 PetriNetUnfolder]: For 116/133 co-relation queries the response was YES. [2021-10-28 09:19:55,528 INFO L84 FinitePrefix]: Finished finitePrefix Result has 356 conditions, 182 events. 35/182 cut-off events. For 116/133 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 584 event pairs, 0 based on Foata normal form. 20/185 useless extension candidates. Maximal degree in co-relation 317. Up to 33 conditions per place. [2021-10-28 09:19:55,530 INFO L132 encePairwiseOnDemand]: 60/66 looper letters, 20 selfloop transitions, 11 changer transitions 8/83 dead transitions. [2021-10-28 09:19:55,530 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 83 transitions, 394 flow [2021-10-28 09:19:55,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-28 09:19:55,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-10-28 09:19:55,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 509 transitions. [2021-10-28 09:19:55,534 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8569023569023569 [2021-10-28 09:19:55,536 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 509 transitions. [2021-10-28 09:19:55,537 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 509 transitions. [2021-10-28 09:19:55,537 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 09:19:55,537 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 509 transitions. [2021-10-28 09:19:55,539 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 56.55555555555556) internal successors, (509), 9 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:19:55,543 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 66.0) internal successors, (660), 10 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:19:55,544 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 66.0) internal successors, (660), 10 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:19:55,544 INFO L186 Difference]: Start difference. First operand has 73 places, 64 transitions, 214 flow. Second operand 9 states and 509 transitions. [2021-10-28 09:19:55,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 83 transitions, 394 flow [2021-10-28 09:19:55,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 83 transitions, 371 flow, removed 9 selfloop flow, removed 3 redundant places. [2021-10-28 09:19:55,555 INFO L242 Difference]: Finished difference. Result has 83 places, 69 transitions, 283 flow [2021-10-28 09:19:55,556 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=203, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=283, PETRI_PLACES=83, PETRI_TRANSITIONS=69} [2021-10-28 09:19:55,557 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 17 predicate places. [2021-10-28 09:19:55,557 INFO L470 AbstractCegarLoop]: Abstraction has has 83 places, 69 transitions, 283 flow [2021-10-28 09:19:55,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 54.166666666666664) internal successors, (325), 6 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:19:55,559 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-28 09:19:55,559 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] [2021-10-28 09:19:55,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-28 09:19:55,560 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-28 09:19:55,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:19:55,562 INFO L85 PathProgramCache]: Analyzing trace with hash 482644881, now seen corresponding path program 2 times [2021-10-28 09:19:55,562 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:19:55,562 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706214820] [2021-10-28 09:19:55,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:19:55,563 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:19:55,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:19:55,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:19:55,750 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:19:55,750 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706214820] [2021-10-28 09:19:55,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706214820] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:19:55,751 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:19:55,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-28 09:19:55,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451147223] [2021-10-28 09:19:55,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 09:19:55,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:19:55,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 09:19:55,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-28 09:19:55,762 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-28 09:19:55,763 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 69 transitions, 283 flow. Second operand has 6 states, 6 states have (on average 54.166666666666664) internal successors, (325), 6 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:19:55,763 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-28 09:19:55,763 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-28 09:19:55,763 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-28 09:19:55,913 INFO L129 PetriNetUnfolder]: 28/171 cut-off events. [2021-10-28 09:19:55,914 INFO L130 PetriNetUnfolder]: For 239/271 co-relation queries the response was YES. [2021-10-28 09:19:55,917 INFO L84 FinitePrefix]: Finished finitePrefix Result has 378 conditions, 171 events. 28/171 cut-off events. For 239/271 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 551 event pairs, 0 based on Foata normal form. 28/183 useless extension candidates. Maximal degree in co-relation 346. Up to 30 conditions per place. [2021-10-28 09:19:55,919 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 16 selfloop transitions, 12 changer transitions 11/83 dead transitions. [2021-10-28 09:19:55,919 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 83 transitions, 471 flow [2021-10-28 09:19:55,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-28 09:19:55,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-10-28 09:19:55,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 503 transitions. [2021-10-28 09:19:55,923 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8468013468013468 [2021-10-28 09:19:55,923 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 503 transitions. [2021-10-28 09:19:55,923 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 503 transitions. [2021-10-28 09:19:55,924 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 09:19:55,924 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 503 transitions. [2021-10-28 09:19:55,927 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 55.888888888888886) internal successors, (503), 9 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:19:55,929 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 66.0) internal successors, (660), 10 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:19:55,929 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 66.0) internal successors, (660), 10 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:19:55,930 INFO L186 Difference]: Start difference. First operand has 83 places, 69 transitions, 283 flow. Second operand 9 states and 503 transitions. [2021-10-28 09:19:55,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 83 transitions, 471 flow [2021-10-28 09:19:55,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 83 transitions, 451 flow, removed 6 selfloop flow, removed 3 redundant places. [2021-10-28 09:19:55,946 INFO L242 Difference]: Finished difference. Result has 90 places, 70 transitions, 326 flow [2021-10-28 09:19:55,946 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=267, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=326, PETRI_PLACES=90, PETRI_TRANSITIONS=70} [2021-10-28 09:19:55,947 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 24 predicate places. [2021-10-28 09:19:55,947 INFO L470 AbstractCegarLoop]: Abstraction has has 90 places, 70 transitions, 326 flow [2021-10-28 09:19:55,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 54.166666666666664) internal successors, (325), 6 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:19:55,948 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-28 09:19:55,948 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:19:55,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-28 09:19:55,949 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-28 09:19:55,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:19:55,950 INFO L85 PathProgramCache]: Analyzing trace with hash 557630062, now seen corresponding path program 1 times [2021-10-28 09:19:55,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:19:55,952 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662156995] [2021-10-28 09:19:55,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:19:55,953 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:19:55,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:19:56,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:19:56,083 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:19:56,085 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662156995] [2021-10-28 09:19:56,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662156995] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:19:56,086 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:19:56,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-28 09:19:56,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893555525] [2021-10-28 09:19:56,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 09:19:56,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:19:56,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 09:19:56,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-10-28 09:19:56,090 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-28 09:19:56,091 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 70 transitions, 326 flow. Second operand has 7 states, 7 states have (on average 54.142857142857146) internal successors, (379), 7 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:19:56,091 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-28 09:19:56,092 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-28 09:19:56,092 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-28 09:19:56,298 INFO L129 PetriNetUnfolder]: 41/214 cut-off events. [2021-10-28 09:19:56,299 INFO L130 PetriNetUnfolder]: For 570/604 co-relation queries the response was YES. [2021-10-28 09:19:56,301 INFO L84 FinitePrefix]: Finished finitePrefix Result has 556 conditions, 214 events. 41/214 cut-off events. For 570/604 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 743 event pairs, 0 based on Foata normal form. 20/215 useless extension candidates. Maximal degree in co-relation 506. Up to 48 conditions per place. [2021-10-28 09:19:56,303 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 21 selfloop transitions, 21 changer transitions 8/94 dead transitions. [2021-10-28 09:19:56,304 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 94 transitions, 650 flow [2021-10-28 09:19:56,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-28 09:19:56,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-10-28 09:19:56,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 620 transitions. [2021-10-28 09:19:56,307 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8539944903581267 [2021-10-28 09:19:56,308 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 620 transitions. [2021-10-28 09:19:56,308 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 620 transitions. [2021-10-28 09:19:56,309 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 09:19:56,309 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 620 transitions. [2021-10-28 09:19:56,311 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 56.36363636363637) internal successors, (620), 11 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:19:56,313 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 66.0) internal successors, (792), 12 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:19:56,314 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 66.0) internal successors, (792), 12 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:19:56,314 INFO L186 Difference]: Start difference. First operand has 90 places, 70 transitions, 326 flow. Second operand 11 states and 620 transitions. [2021-10-28 09:19:56,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 94 transitions, 650 flow [2021-10-28 09:19:56,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 94 transitions, 534 flow, removed 45 selfloop flow, removed 10 redundant places. [2021-10-28 09:19:56,322 INFO L242 Difference]: Finished difference. Result has 94 places, 76 transitions, 411 flow [2021-10-28 09:19:56,322 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=280, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=411, PETRI_PLACES=94, PETRI_TRANSITIONS=76} [2021-10-28 09:19:56,322 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 28 predicate places. [2021-10-28 09:19:56,323 INFO L470 AbstractCegarLoop]: Abstraction has has 94 places, 76 transitions, 411 flow [2021-10-28 09:19:56,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 54.142857142857146) internal successors, (379), 7 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:19:56,323 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-28 09:19:56,324 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] [2021-10-28 09:19:56,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-28 09:19:56,324 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-28 09:19:56,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:19:56,325 INFO L85 PathProgramCache]: Analyzing trace with hash 1889861268, now seen corresponding path program 2 times [2021-10-28 09:19:56,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:19:56,326 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914777442] [2021-10-28 09:19:56,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:19:56,326 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:19:56,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:19:56,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:19:56,484 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:19:56,485 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914777442] [2021-10-28 09:19:56,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914777442] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:19:56,485 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:19:56,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-28 09:19:56,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745972111] [2021-10-28 09:19:56,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 09:19:56,486 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:19:56,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 09:19:56,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-28 09:19:56,491 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-28 09:19:56,492 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 76 transitions, 411 flow. Second operand has 7 states, 7 states have (on average 54.142857142857146) internal successors, (379), 7 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:19:56,492 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-28 09:19:56,492 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-28 09:19:56,493 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-28 09:19:56,718 INFO L129 PetriNetUnfolder]: 36/206 cut-off events. [2021-10-28 09:19:56,718 INFO L130 PetriNetUnfolder]: For 803/857 co-relation queries the response was YES. [2021-10-28 09:19:56,720 INFO L84 FinitePrefix]: Finished finitePrefix Result has 594 conditions, 206 events. 36/206 cut-off events. For 803/857 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 748 event pairs, 0 based on Foata normal form. 29/216 useless extension candidates. Maximal degree in co-relation 550. Up to 44 conditions per place. [2021-10-28 09:19:56,725 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 19 selfloop transitions, 23 changer transitions 11/97 dead transitions. [2021-10-28 09:19:56,725 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 97 transitions, 781 flow [2021-10-28 09:19:56,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-28 09:19:56,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-10-28 09:19:56,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 670 transitions. [2021-10-28 09:19:56,731 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8459595959595959 [2021-10-28 09:19:56,731 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 670 transitions. [2021-10-28 09:19:56,731 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 670 transitions. [2021-10-28 09:19:56,732 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 09:19:56,732 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 670 transitions. [2021-10-28 09:19:56,735 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 55.833333333333336) internal successors, (670), 12 states have internal predecessors, (670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:19:56,738 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 66.0) internal successors, (858), 13 states have internal predecessors, (858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:19:56,740 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 66.0) internal successors, (858), 13 states have internal predecessors, (858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:19:56,741 INFO L186 Difference]: Start difference. First operand has 94 places, 76 transitions, 411 flow. Second operand 12 states and 670 transitions. [2021-10-28 09:19:56,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 97 transitions, 781 flow [2021-10-28 09:19:56,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 97 transitions, 723 flow, removed 20 selfloop flow, removed 5 redundant places. [2021-10-28 09:19:56,754 INFO L242 Difference]: Finished difference. Result has 103 places, 79 transitions, 499 flow [2021-10-28 09:19:56,755 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=377, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=499, PETRI_PLACES=103, PETRI_TRANSITIONS=79} [2021-10-28 09:19:56,755 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 37 predicate places. [2021-10-28 09:19:56,755 INFO L470 AbstractCegarLoop]: Abstraction has has 103 places, 79 transitions, 499 flow [2021-10-28 09:19:56,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 54.142857142857146) internal successors, (379), 7 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:19:56,757 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-28 09:19:56,758 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:19:56,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-28 09:19:56,759 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-28 09:19:56,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:19:56,759 INFO L85 PathProgramCache]: Analyzing trace with hash 1339160469, now seen corresponding path program 1 times [2021-10-28 09:19:56,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:19:56,760 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281912667] [2021-10-28 09:19:56,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:19:56,760 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:19:56,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:19:56,922 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:19:56,922 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:19:56,923 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281912667] [2021-10-28 09:19:56,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281912667] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:19:56,923 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723142989] [2021-10-28 09:19:56,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:19:56,924 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:19:56,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e43e6a-0a58-4d73-beb2-0deb94959632/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:19:56,938 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e43e6a-0a58-4d73-beb2-0deb94959632/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:19:56,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e43e6a-0a58-4d73-beb2-0deb94959632/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-28 09:19:57,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:19:57,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-28 09:19:57,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:19:57,384 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:19:57,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723142989] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:19:57,385 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:19:57,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-10-28 09:19:57,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791943526] [2021-10-28 09:19:57,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-28 09:19:57,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:19:57,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-28 09:19:57,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-10-28 09:19:57,391 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-28 09:19:57,392 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 79 transitions, 499 flow. Second operand has 9 states, 9 states have (on average 54.22222222222222) internal successors, (488), 9 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:19:57,393 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-28 09:19:57,393 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-28 09:19:57,393 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-28 09:19:57,565 INFO L129 PetriNetUnfolder]: 36/213 cut-off events. [2021-10-28 09:19:57,565 INFO L130 PetriNetUnfolder]: For 1073/1130 co-relation queries the response was YES. [2021-10-28 09:19:57,567 INFO L84 FinitePrefix]: Finished finitePrefix Result has 654 conditions, 213 events. 36/213 cut-off events. For 1073/1130 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 734 event pairs, 0 based on Foata normal form. 35/227 useless extension candidates. Maximal degree in co-relation 604. Up to 44 conditions per place. [2021-10-28 09:19:57,570 INFO L132 encePairwiseOnDemand]: 60/66 looper letters, 28 selfloop transitions, 13 changer transitions 8/93 dead transitions. [2021-10-28 09:19:57,570 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 93 transitions, 807 flow [2021-10-28 09:19:57,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-28 09:19:57,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-10-28 09:19:57,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 615 transitions. [2021-10-28 09:19:57,573 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8471074380165289 [2021-10-28 09:19:57,574 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 615 transitions. [2021-10-28 09:19:57,574 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 615 transitions. [2021-10-28 09:19:57,574 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 09:19:57,575 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 615 transitions. [2021-10-28 09:19:57,578 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 55.90909090909091) internal successors, (615), 11 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:19:57,581 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 66.0) internal successors, (792), 12 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:19:57,582 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 66.0) internal successors, (792), 12 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:19:57,582 INFO L186 Difference]: Start difference. First operand has 103 places, 79 transitions, 499 flow. Second operand 11 states and 615 transitions. [2021-10-28 09:19:57,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 93 transitions, 807 flow [2021-10-28 09:19:57,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 93 transitions, 734 flow, removed 19 selfloop flow, removed 9 redundant places. [2021-10-28 09:19:57,591 INFO L242 Difference]: Finished difference. Result has 106 places, 81 transitions, 514 flow [2021-10-28 09:19:57,591 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=436, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=514, PETRI_PLACES=106, PETRI_TRANSITIONS=81} [2021-10-28 09:19:57,592 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 40 predicate places. [2021-10-28 09:19:57,592 INFO L470 AbstractCegarLoop]: Abstraction has has 106 places, 81 transitions, 514 flow [2021-10-28 09:19:57,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 54.22222222222222) internal successors, (488), 9 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:19:57,593 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-28 09:19:57,593 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:19:57,630 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e43e6a-0a58-4d73-beb2-0deb94959632/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-28 09:19:57,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e43e6a-0a58-4d73-beb2-0deb94959632/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:19:57,809 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-28 09:19:57,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:19:57,809 INFO L85 PathProgramCache]: Analyzing trace with hash 466216687, now seen corresponding path program 2 times [2021-10-28 09:19:57,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:19:57,810 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097678927] [2021-10-28 09:19:57,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:19:57,810 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:19:57,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:19:57,950 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:19:57,951 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:19:57,951 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097678927] [2021-10-28 09:19:57,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097678927] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:19:57,952 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516615584] [2021-10-28 09:19:57,952 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 09:19:57,952 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:19:57,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e43e6a-0a58-4d73-beb2-0deb94959632/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:19:57,957 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e43e6a-0a58-4d73-beb2-0deb94959632/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:19:57,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e43e6a-0a58-4d73-beb2-0deb94959632/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-28 09:19:58,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 09:19:58,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:19:58,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-28 09:19:58,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:19:58,307 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:19:58,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516615584] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:19:58,308 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:19:58,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-10-28 09:19:58,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182432064] [2021-10-28 09:19:58,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-28 09:19:58,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:19:58,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-28 09:19:58,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-10-28 09:19:58,314 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-28 09:19:58,315 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 81 transitions, 514 flow. Second operand has 10 states, 10 states have (on average 54.3) internal successors, (543), 10 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:19:58,316 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-28 09:19:58,316 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-28 09:19:58,316 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-28 09:19:58,541 INFO L129 PetriNetUnfolder]: 42/245 cut-off events. [2021-10-28 09:19:58,541 INFO L130 PetriNetUnfolder]: For 1540/1608 co-relation queries the response was YES. [2021-10-28 09:19:58,543 INFO L84 FinitePrefix]: Finished finitePrefix Result has 803 conditions, 245 events. 42/245 cut-off events. For 1540/1608 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 964 event pairs, 0 based on Foata normal form. 35/256 useless extension candidates. Maximal degree in co-relation 748. Up to 54 conditions per place. [2021-10-28 09:19:58,548 INFO L132 encePairwiseOnDemand]: 60/66 looper letters, 28 selfloop transitions, 21 changer transitions 8/101 dead transitions. [2021-10-28 09:19:58,548 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 101 transitions, 952 flow [2021-10-28 09:19:58,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-28 09:19:58,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-10-28 09:19:58,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 782 transitions. [2021-10-28 09:19:58,552 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8463203463203464 [2021-10-28 09:19:58,553 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 782 transitions. [2021-10-28 09:19:58,553 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 782 transitions. [2021-10-28 09:19:58,554 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 09:19:58,554 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 782 transitions. [2021-10-28 09:19:58,557 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 55.857142857142854) internal successors, (782), 14 states have internal predecessors, (782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:19:58,560 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 66.0) internal successors, (990), 15 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:19:58,561 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 66.0) internal successors, (990), 15 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:19:58,561 INFO L186 Difference]: Start difference. First operand has 106 places, 81 transitions, 514 flow. Second operand 14 states and 782 transitions. [2021-10-28 09:19:58,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 101 transitions, 952 flow [2021-10-28 09:19:58,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 101 transitions, 858 flow, removed 36 selfloop flow, removed 8 redundant places. [2021-10-28 09:19:58,576 INFO L242 Difference]: Finished difference. Result has 115 places, 88 transitions, 629 flow [2021-10-28 09:19:58,576 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=460, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=629, PETRI_PLACES=115, PETRI_TRANSITIONS=88} [2021-10-28 09:19:58,577 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 49 predicate places. [2021-10-28 09:19:58,577 INFO L470 AbstractCegarLoop]: Abstraction has has 115 places, 88 transitions, 629 flow [2021-10-28 09:19:58,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 54.3) internal successors, (543), 10 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:19:58,578 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-28 09:19:58,578 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:19:58,616 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e43e6a-0a58-4d73-beb2-0deb94959632/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-28 09:19:58,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e43e6a-0a58-4d73-beb2-0deb94959632/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:19:58,793 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-28 09:19:58,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:19:58,793 INFO L85 PathProgramCache]: Analyzing trace with hash 1190358857, now seen corresponding path program 3 times [2021-10-28 09:19:58,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:19:58,794 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986785953] [2021-10-28 09:19:58,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:19:58,794 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:19:58,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:19:58,916 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:19:58,916 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:19:58,917 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986785953] [2021-10-28 09:19:58,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986785953] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:19:58,917 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503009014] [2021-10-28 09:19:58,918 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 09:19:58,918 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:19:58,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e43e6a-0a58-4d73-beb2-0deb94959632/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:19:58,929 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e43e6a-0a58-4d73-beb2-0deb94959632/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:19:58,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e43e6a-0a58-4d73-beb2-0deb94959632/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-28 09:19:59,064 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-28 09:19:59,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:19:59,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-28 09:19:59,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:19:59,302 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:19:59,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503009014] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:19:59,303 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:19:59,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-10-28 09:19:59,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467175635] [2021-10-28 09:19:59,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-28 09:19:59,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:19:59,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-28 09:19:59,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-10-28 09:19:59,310 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-28 09:19:59,311 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 88 transitions, 629 flow. Second operand has 9 states, 9 states have (on average 54.22222222222222) internal successors, (488), 9 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:19:59,311 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-28 09:19:59,311 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-28 09:19:59,311 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-28 09:19:59,560 INFO L129 PetriNetUnfolder]: 57/320 cut-off events. [2021-10-28 09:19:59,560 INFO L130 PetriNetUnfolder]: For 2724/2816 co-relation queries the response was YES. [2021-10-28 09:19:59,563 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1173 conditions, 320 events. 57/320 cut-off events. For 2724/2816 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1464 event pairs, 0 based on Foata normal form. 40/328 useless extension candidates. Maximal degree in co-relation 1112. Up to 74 conditions per place. [2021-10-28 09:19:59,567 INFO L132 encePairwiseOnDemand]: 60/66 looper letters, 34 selfloop transitions, 26 changer transitions 8/112 dead transitions. [2021-10-28 09:19:59,568 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 112 transitions, 1217 flow [2021-10-28 09:19:59,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-28 09:19:59,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-10-28 09:19:59,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 842 transitions. [2021-10-28 09:19:59,572 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8505050505050505 [2021-10-28 09:19:59,572 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 842 transitions. [2021-10-28 09:19:59,572 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 842 transitions. [2021-10-28 09:19:59,573 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 09:19:59,574 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 842 transitions. [2021-10-28 09:19:59,577 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 56.13333333333333) internal successors, (842), 15 states have internal predecessors, (842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:19:59,581 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 66.0) internal successors, (1056), 16 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:19:59,582 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 66.0) internal successors, (1056), 16 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:19:59,582 INFO L186 Difference]: Start difference. First operand has 115 places, 88 transitions, 629 flow. Second operand 15 states and 842 transitions. [2021-10-28 09:19:59,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 112 transitions, 1217 flow [2021-10-28 09:19:59,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 112 transitions, 1085 flow, removed 60 selfloop flow, removed 6 redundant places. [2021-10-28 09:19:59,599 INFO L242 Difference]: Finished difference. Result has 127 places, 94 transitions, 765 flow [2021-10-28 09:19:59,599 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=567, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=765, PETRI_PLACES=127, PETRI_TRANSITIONS=94} [2021-10-28 09:19:59,600 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 61 predicate places. [2021-10-28 09:19:59,600 INFO L470 AbstractCegarLoop]: Abstraction has has 127 places, 94 transitions, 765 flow [2021-10-28 09:19:59,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 54.22222222222222) internal successors, (488), 9 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:19:59,601 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-28 09:19:59,601 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:19:59,644 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e43e6a-0a58-4d73-beb2-0deb94959632/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-28 09:19:59,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e43e6a-0a58-4d73-beb2-0deb94959632/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:19:59,829 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-28 09:19:59,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:19:59,829 INFO L85 PathProgramCache]: Analyzing trace with hash -2019400091, now seen corresponding path program 4 times [2021-10-28 09:19:59,830 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:19:59,830 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772956879] [2021-10-28 09:19:59,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:19:59,830 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:19:59,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:19:59,948 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:19:59,949 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:19:59,949 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772956879] [2021-10-28 09:19:59,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772956879] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:19:59,950 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712097824] [2021-10-28 09:19:59,950 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 09:19:59,950 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:19:59,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e43e6a-0a58-4d73-beb2-0deb94959632/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:19:59,952 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e43e6a-0a58-4d73-beb2-0deb94959632/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:19:59,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e43e6a-0a58-4d73-beb2-0deb94959632/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-28 09:20:00,111 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 09:20:00,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:20:00,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-28 09:20:00,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:20:00,321 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:20:00,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712097824] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:20:00,321 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:20:00,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-10-28 09:20:00,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816455546] [2021-10-28 09:20:00,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-28 09:20:00,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:20:00,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-28 09:20:00,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-10-28 09:20:00,326 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-28 09:20:00,328 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 94 transitions, 765 flow. Second operand has 10 states, 10 states have (on average 54.2) internal successors, (542), 10 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:00,328 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-28 09:20:00,328 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-28 09:20:00,328 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-28 09:20:00,675 INFO L129 PetriNetUnfolder]: 58/343 cut-off events. [2021-10-28 09:20:00,676 INFO L130 PetriNetUnfolder]: For 3986/4075 co-relation queries the response was YES. [2021-10-28 09:20:00,679 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1352 conditions, 343 events. 58/343 cut-off events. For 3986/4075 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1641 event pairs, 0 based on Foata normal form. 47/356 useless extension candidates. Maximal degree in co-relation 1287. Up to 76 conditions per place. [2021-10-28 09:20:00,683 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 30 selfloop transitions, 34 changer transitions 17/125 dead transitions. [2021-10-28 09:20:00,684 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 125 transitions, 1651 flow [2021-10-28 09:20:00,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-28 09:20:00,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-10-28 09:20:00,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1116 transitions. [2021-10-28 09:20:00,689 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8454545454545455 [2021-10-28 09:20:00,689 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1116 transitions. [2021-10-28 09:20:00,690 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1116 transitions. [2021-10-28 09:20:00,691 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 09:20:00,691 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1116 transitions. [2021-10-28 09:20:00,695 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 55.8) internal successors, (1116), 20 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:00,699 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 66.0) internal successors, (1386), 21 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:00,700 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 66.0) internal successors, (1386), 21 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:00,700 INFO L186 Difference]: Start difference. First operand has 127 places, 94 transitions, 765 flow. Second operand 20 states and 1116 transitions. [2021-10-28 09:20:00,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 125 transitions, 1651 flow [2021-10-28 09:20:00,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 125 transitions, 1431 flow, removed 93 selfloop flow, removed 10 redundant places. [2021-10-28 09:20:00,722 INFO L242 Difference]: Finished difference. Result has 143 places, 103 transitions, 975 flow [2021-10-28 09:20:00,723 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=659, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=975, PETRI_PLACES=143, PETRI_TRANSITIONS=103} [2021-10-28 09:20:00,723 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 77 predicate places. [2021-10-28 09:20:00,723 INFO L470 AbstractCegarLoop]: Abstraction has has 143 places, 103 transitions, 975 flow [2021-10-28 09:20:00,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 54.2) internal successors, (542), 10 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:00,724 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-28 09:20:00,724 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:20:00,767 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e43e6a-0a58-4d73-beb2-0deb94959632/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-28 09:20:00,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e43e6a-0a58-4d73-beb2-0deb94959632/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:20:00,939 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-28 09:20:00,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:20:00,939 INFO L85 PathProgramCache]: Analyzing trace with hash -1615124285, now seen corresponding path program 1 times [2021-10-28 09:20:00,939 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:20:00,940 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84339657] [2021-10-28 09:20:00,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:20:00,940 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:20:00,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:20:01,068 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:20:01,069 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:20:01,069 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84339657] [2021-10-28 09:20:01,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84339657] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:20:01,069 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483626220] [2021-10-28 09:20:01,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:20:01,070 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:20:01,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e43e6a-0a58-4d73-beb2-0deb94959632/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:20:01,071 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e43e6a-0a58-4d73-beb2-0deb94959632/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:20:01,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e43e6a-0a58-4d73-beb2-0deb94959632/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-28 09:20:01,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:20:01,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-28 09:20:01,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:20:01,507 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:20:01,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483626220] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:20:01,508 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:20:01,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-10-28 09:20:01,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435743512] [2021-10-28 09:20:01,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-28 09:20:01,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:20:01,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-28 09:20:01,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-10-28 09:20:01,511 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-28 09:20:01,512 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 103 transitions, 975 flow. Second operand has 9 states, 9 states have (on average 54.111111111111114) internal successors, (487), 9 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:01,513 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-28 09:20:01,513 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-28 09:20:01,513 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-28 09:20:01,715 INFO L129 PetriNetUnfolder]: 54/323 cut-off events. [2021-10-28 09:20:01,715 INFO L130 PetriNetUnfolder]: For 4100/4187 co-relation queries the response was YES. [2021-10-28 09:20:01,719 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1301 conditions, 323 events. 54/323 cut-off events. For 4100/4187 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1506 event pairs, 0 based on Foata normal form. 31/322 useless extension candidates. Maximal degree in co-relation 1228. Up to 70 conditions per place. [2021-10-28 09:20:01,723 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 45 selfloop transitions, 25 changer transitions 8/122 dead transitions. [2021-10-28 09:20:01,723 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 122 transitions, 1613 flow [2021-10-28 09:20:01,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-28 09:20:01,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-10-28 09:20:01,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 726 transitions. [2021-10-28 09:20:01,726 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8461538461538461 [2021-10-28 09:20:01,726 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 726 transitions. [2021-10-28 09:20:01,727 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 726 transitions. [2021-10-28 09:20:01,727 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 09:20:01,727 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 726 transitions. [2021-10-28 09:20:01,729 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 55.84615384615385) internal successors, (726), 13 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:01,732 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 66.0) internal successors, (924), 14 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:01,732 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 66.0) internal successors, (924), 14 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:01,733 INFO L186 Difference]: Start difference. First operand has 143 places, 103 transitions, 975 flow. Second operand 13 states and 726 transitions. [2021-10-28 09:20:01,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 122 transitions, 1613 flow [2021-10-28 09:20:01,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 122 transitions, 1374 flow, removed 105 selfloop flow, removed 13 redundant places. [2021-10-28 09:20:01,762 INFO L242 Difference]: Finished difference. Result has 142 places, 105 transitions, 890 flow [2021-10-28 09:20:01,762 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=764, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=890, PETRI_PLACES=142, PETRI_TRANSITIONS=105} [2021-10-28 09:20:01,763 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 76 predicate places. [2021-10-28 09:20:01,763 INFO L470 AbstractCegarLoop]: Abstraction has has 142 places, 105 transitions, 890 flow [2021-10-28 09:20:01,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 54.111111111111114) internal successors, (487), 9 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:01,764 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-28 09:20:01,764 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:20:01,803 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e43e6a-0a58-4d73-beb2-0deb94959632/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-28 09:20:01,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e43e6a-0a58-4d73-beb2-0deb94959632/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:20:01,993 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-28 09:20:01,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:20:01,993 INFO L85 PathProgramCache]: Analyzing trace with hash 70257965, now seen corresponding path program 2 times [2021-10-28 09:20:01,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:20:01,994 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739579597] [2021-10-28 09:20:01,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:20:01,994 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:20:02,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:20:02,105 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:20:02,105 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:20:02,105 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739579597] [2021-10-28 09:20:02,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739579597] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:20:02,106 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123243541] [2021-10-28 09:20:02,106 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 09:20:02,106 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:20:02,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e43e6a-0a58-4d73-beb2-0deb94959632/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:20:02,107 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e43e6a-0a58-4d73-beb2-0deb94959632/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:20:02,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e43e6a-0a58-4d73-beb2-0deb94959632/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-28 09:20:02,303 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 09:20:02,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:20:02,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-28 09:20:02,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:20:02,515 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:20:02,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123243541] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:20:02,515 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:20:02,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-10-28 09:20:02,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509066834] [2021-10-28 09:20:02,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-28 09:20:02,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:20:02,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-28 09:20:02,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-10-28 09:20:02,519 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-28 09:20:02,520 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 105 transitions, 890 flow. Second operand has 9 states, 9 states have (on average 54.111111111111114) internal successors, (487), 9 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:02,520 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-28 09:20:02,520 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-28 09:20:02,520 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-28 09:20:02,760 INFO L129 PetriNetUnfolder]: 69/418 cut-off events. [2021-10-28 09:20:02,760 INFO L130 PetriNetUnfolder]: For 5788/5870 co-relation queries the response was YES. [2021-10-28 09:20:02,765 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1695 conditions, 418 events. 69/418 cut-off events. For 5788/5870 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 2172 event pairs, 0 based on Foata normal form. 36/414 useless extension candidates. Maximal degree in co-relation 1621. Up to 78 conditions per place. [2021-10-28 09:20:02,770 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 36 selfloop transitions, 45 changer transitions 8/133 dead transitions. [2021-10-28 09:20:02,771 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 133 transitions, 1808 flow [2021-10-28 09:20:02,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-28 09:20:02,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-10-28 09:20:02,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 895 transitions. [2021-10-28 09:20:02,774 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8475378787878788 [2021-10-28 09:20:02,774 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 895 transitions. [2021-10-28 09:20:02,774 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 895 transitions. [2021-10-28 09:20:02,775 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 09:20:02,775 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 895 transitions. [2021-10-28 09:20:02,777 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 55.9375) internal successors, (895), 16 states have internal predecessors, (895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:02,780 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 66.0) internal successors, (1122), 17 states have internal predecessors, (1122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:02,781 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 66.0) internal successors, (1122), 17 states have internal predecessors, (1122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:02,781 INFO L186 Difference]: Start difference. First operand has 142 places, 105 transitions, 890 flow. Second operand 16 states and 895 transitions. [2021-10-28 09:20:02,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 133 transitions, 1808 flow [2021-10-28 09:20:02,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 133 transitions, 1634 flow, removed 66 selfloop flow, removed 10 redundant places. [2021-10-28 09:20:02,811 INFO L242 Difference]: Finished difference. Result has 151 places, 111 transitions, 1097 flow [2021-10-28 09:20:02,812 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=802, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1097, PETRI_PLACES=151, PETRI_TRANSITIONS=111} [2021-10-28 09:20:02,813 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 85 predicate places. [2021-10-28 09:20:02,813 INFO L470 AbstractCegarLoop]: Abstraction has has 151 places, 111 transitions, 1097 flow [2021-10-28 09:20:02,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 54.111111111111114) internal successors, (487), 9 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:02,814 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-28 09:20:02,814 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:20:02,857 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e43e6a-0a58-4d73-beb2-0deb94959632/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-28 09:20:03,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e43e6a-0a58-4d73-beb2-0deb94959632/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:20:03,029 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-28 09:20:03,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:20:03,029 INFO L85 PathProgramCache]: Analyzing trace with hash -245613985, now seen corresponding path program 3 times [2021-10-28 09:20:03,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:20:03,030 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883975353] [2021-10-28 09:20:03,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:20:03,030 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:20:03,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:20:03,170 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:20:03,171 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:20:03,171 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883975353] [2021-10-28 09:20:03,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883975353] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:20:03,171 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759472516] [2021-10-28 09:20:03,172 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 09:20:03,172 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:20:03,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e43e6a-0a58-4d73-beb2-0deb94959632/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:20:03,173 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e43e6a-0a58-4d73-beb2-0deb94959632/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:20:03,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e43e6a-0a58-4d73-beb2-0deb94959632/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-28 09:20:03,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-28 09:20:03,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:20:03,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-28 09:20:03,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:20:03,636 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:20:03,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759472516] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:20:03,636 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:20:03,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-10-28 09:20:03,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842151990] [2021-10-28 09:20:03,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-28 09:20:03,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:20:03,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-28 09:20:03,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-10-28 09:20:03,640 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-28 09:20:03,641 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 111 transitions, 1097 flow. Second operand has 10 states, 10 states have (on average 54.2) internal successors, (542), 10 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:03,641 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-28 09:20:03,641 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-28 09:20:03,641 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-28 09:20:03,996 INFO L129 PetriNetUnfolder]: 64/390 cut-off events. [2021-10-28 09:20:03,996 INFO L130 PetriNetUnfolder]: For 6648/6766 co-relation queries the response was YES. [2021-10-28 09:20:04,001 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1682 conditions, 390 events. 64/390 cut-off events. For 6648/6766 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 2002 event pairs, 0 based on Foata normal form. 50/402 useless extension candidates. Maximal degree in co-relation 1604. Up to 74 conditions per place. [2021-10-28 09:20:04,006 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 28 selfloop transitions, 53 changer transitions 11/136 dead transitions. [2021-10-28 09:20:04,007 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 136 transitions, 2053 flow [2021-10-28 09:20:04,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-28 09:20:04,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-10-28 09:20:04,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1003 transitions. [2021-10-28 09:20:04,010 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8442760942760943 [2021-10-28 09:20:04,010 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1003 transitions. [2021-10-28 09:20:04,011 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1003 transitions. [2021-10-28 09:20:04,011 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 09:20:04,011 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1003 transitions. [2021-10-28 09:20:04,014 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 55.72222222222222) internal successors, (1003), 18 states have internal predecessors, (1003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:04,017 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 66.0) internal successors, (1254), 19 states have internal predecessors, (1254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:04,018 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 66.0) internal successors, (1254), 19 states have internal predecessors, (1254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:04,019 INFO L186 Difference]: Start difference. First operand has 151 places, 111 transitions, 1097 flow. Second operand 18 states and 1003 transitions. [2021-10-28 09:20:04,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 136 transitions, 2053 flow [2021-10-28 09:20:04,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 136 transitions, 1794 flow, removed 101 selfloop flow, removed 11 redundant places. [2021-10-28 09:20:04,054 INFO L242 Difference]: Finished difference. Result has 160 places, 114 transitions, 1183 flow [2021-10-28 09:20:04,055 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=948, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1183, PETRI_PLACES=160, PETRI_TRANSITIONS=114} [2021-10-28 09:20:04,055 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 94 predicate places. [2021-10-28 09:20:04,056 INFO L470 AbstractCegarLoop]: Abstraction has has 160 places, 114 transitions, 1183 flow [2021-10-28 09:20:04,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 54.2) internal successors, (542), 10 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:04,056 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-28 09:20:04,057 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:20:04,084 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e43e6a-0a58-4d73-beb2-0deb94959632/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-28 09:20:04,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e43e6a-0a58-4d73-beb2-0deb94959632/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-10-28 09:20:04,261 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-28 09:20:04,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:20:04,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1609128234, now seen corresponding path program 4 times [2021-10-28 09:20:04,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:20:04,262 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575718181] [2021-10-28 09:20:04,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:20:04,262 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:20:04,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:20:04,395 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:20:04,395 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:20:04,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575718181] [2021-10-28 09:20:04,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575718181] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:20:04,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377300855] [2021-10-28 09:20:04,396 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 09:20:04,397 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:20:04,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e43e6a-0a58-4d73-beb2-0deb94959632/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:20:04,401 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e43e6a-0a58-4d73-beb2-0deb94959632/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:20:04,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e43e6a-0a58-4d73-beb2-0deb94959632/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-28 09:20:04,664 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 09:20:04,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:20:04,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-28 09:20:04,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:20:04,998 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:20:04,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377300855] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:20:04,999 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:20:04,999 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-10-28 09:20:04,999 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057286522] [2021-10-28 09:20:05,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-28 09:20:05,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:20:05,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-28 09:20:05,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-10-28 09:20:05,002 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-28 09:20:05,003 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 114 transitions, 1183 flow. Second operand has 11 states, 11 states have (on average 54.18181818181818) internal successors, (596), 11 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:05,003 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-28 09:20:05,004 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-28 09:20:05,004 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-28 09:20:05,215 INFO L129 PetriNetUnfolder]: 64/404 cut-off events. [2021-10-28 09:20:05,215 INFO L130 PetriNetUnfolder]: For 6256/6339 co-relation queries the response was YES. [2021-10-28 09:20:05,220 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1697 conditions, 404 events. 64/404 cut-off events. For 6256/6339 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 2053 event pairs, 0 based on Foata normal form. 35/399 useless extension candidates. Maximal degree in co-relation 1616. Up to 87 conditions per place. [2021-10-28 09:20:05,225 INFO L132 encePairwiseOnDemand]: 60/66 looper letters, 63 selfloop transitions, 15 changer transitions 8/130 dead transitions. [2021-10-28 09:20:05,226 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 130 transitions, 1837 flow [2021-10-28 09:20:05,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-28 09:20:05,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-10-28 09:20:05,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 725 transitions. [2021-10-28 09:20:05,229 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.844988344988345 [2021-10-28 09:20:05,229 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 725 transitions. [2021-10-28 09:20:05,229 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 725 transitions. [2021-10-28 09:20:05,230 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 09:20:05,230 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 725 transitions. [2021-10-28 09:20:05,232 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 55.76923076923077) internal successors, (725), 13 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:05,234 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 66.0) internal successors, (924), 14 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:05,235 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 66.0) internal successors, (924), 14 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:05,235 INFO L186 Difference]: Start difference. First operand has 160 places, 114 transitions, 1183 flow. Second operand 13 states and 725 transitions. [2021-10-28 09:20:05,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 130 transitions, 1837 flow [2021-10-28 09:20:05,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 130 transitions, 1629 flow, removed 51 selfloop flow, removed 18 redundant places. [2021-10-28 09:20:05,273 INFO L242 Difference]: Finished difference. Result has 156 places, 116 transitions, 1121 flow [2021-10-28 09:20:05,273 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=1007, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1121, PETRI_PLACES=156, PETRI_TRANSITIONS=116} [2021-10-28 09:20:05,274 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 90 predicate places. [2021-10-28 09:20:05,274 INFO L470 AbstractCegarLoop]: Abstraction has has 156 places, 116 transitions, 1121 flow [2021-10-28 09:20:05,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 54.18181818181818) internal successors, (596), 11 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:05,275 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-28 09:20:05,275 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:20:05,322 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e43e6a-0a58-4d73-beb2-0deb94959632/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-28 09:20:05,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e43e6a-0a58-4d73-beb2-0deb94959632/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-10-28 09:20:05,501 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-28 09:20:05,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:20:05,501 INFO L85 PathProgramCache]: Analyzing trace with hash 378278894, now seen corresponding path program 5 times [2021-10-28 09:20:05,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:20:05,501 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466457250] [2021-10-28 09:20:05,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:20:05,502 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:20:05,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:20:05,667 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:20:05,668 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:20:05,668 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466457250] [2021-10-28 09:20:05,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466457250] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:20:05,668 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518755323] [2021-10-28 09:20:05,669 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 09:20:05,669 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:20:05,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e43e6a-0a58-4d73-beb2-0deb94959632/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:20:05,670 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e43e6a-0a58-4d73-beb2-0deb94959632/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:20:05,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e43e6a-0a58-4d73-beb2-0deb94959632/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-28 09:20:05,936 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-28 09:20:05,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:20:05,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-28 09:20:05,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:20:06,282 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:20:06,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518755323] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:20:06,282 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:20:06,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-10-28 09:20:06,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936393526] [2021-10-28 09:20:06,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-28 09:20:06,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:20:06,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-28 09:20:06,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-10-28 09:20:06,287 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-28 09:20:06,288 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 116 transitions, 1121 flow. Second operand has 12 states, 12 states have (on average 54.25) internal successors, (651), 12 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:06,289 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-28 09:20:06,289 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-28 09:20:06,289 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-28 09:20:06,575 INFO L129 PetriNetUnfolder]: 66/408 cut-off events. [2021-10-28 09:20:06,575 INFO L130 PetriNetUnfolder]: For 7029/7131 co-relation queries the response was YES. [2021-10-28 09:20:06,580 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1745 conditions, 408 events. 66/408 cut-off events. For 7029/7131 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 2119 event pairs, 0 based on Foata normal form. 37/404 useless extension candidates. Maximal degree in co-relation 1666. Up to 76 conditions per place. [2021-10-28 09:20:06,585 INFO L132 encePairwiseOnDemand]: 60/66 looper letters, 56 selfloop transitions, 25 changer transitions 8/133 dead transitions. [2021-10-28 09:20:06,586 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 133 transitions, 1839 flow [2021-10-28 09:20:06,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-28 09:20:06,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-10-28 09:20:06,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 892 transitions. [2021-10-28 09:20:06,589 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8446969696969697 [2021-10-28 09:20:06,589 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 892 transitions. [2021-10-28 09:20:06,589 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 892 transitions. [2021-10-28 09:20:06,590 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 09:20:06,590 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 892 transitions. [2021-10-28 09:20:06,593 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 55.75) internal successors, (892), 16 states have internal predecessors, (892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:06,596 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 66.0) internal successors, (1122), 17 states have internal predecessors, (1122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:06,597 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 66.0) internal successors, (1122), 17 states have internal predecessors, (1122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:06,598 INFO L186 Difference]: Start difference. First operand has 156 places, 116 transitions, 1121 flow. Second operand 16 states and 892 transitions. [2021-10-28 09:20:06,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 133 transitions, 1839 flow [2021-10-28 09:20:06,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 133 transitions, 1631 flow, removed 91 selfloop flow, removed 10 redundant places. [2021-10-28 09:20:06,635 INFO L242 Difference]: Finished difference. Result has 163 places, 118 transitions, 1153 flow [2021-10-28 09:20:06,636 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=1021, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1153, PETRI_PLACES=163, PETRI_TRANSITIONS=118} [2021-10-28 09:20:06,636 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 97 predicate places. [2021-10-28 09:20:06,637 INFO L470 AbstractCegarLoop]: Abstraction has has 163 places, 118 transitions, 1153 flow [2021-10-28 09:20:06,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 54.25) internal successors, (651), 12 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:06,637 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-28 09:20:06,638 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:20:06,683 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e43e6a-0a58-4d73-beb2-0deb94959632/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-28 09:20:06,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e43e6a-0a58-4d73-beb2-0deb94959632/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-10-28 09:20:06,861 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-28 09:20:06,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:20:06,862 INFO L85 PathProgramCache]: Analyzing trace with hash 25133018, now seen corresponding path program 6 times [2021-10-28 09:20:06,862 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:20:06,862 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344737476] [2021-10-28 09:20:06,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:20:06,863 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:20:06,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:20:06,999 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:20:06,999 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:20:06,999 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344737476] [2021-10-28 09:20:07,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344737476] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:20:07,000 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386210673] [2021-10-28 09:20:07,000 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-28 09:20:07,000 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:20:07,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e43e6a-0a58-4d73-beb2-0deb94959632/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:20:07,005 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e43e6a-0a58-4d73-beb2-0deb94959632/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:20:07,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e43e6a-0a58-4d73-beb2-0deb94959632/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-28 09:20:07,301 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-28 09:20:07,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:20:07,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-28 09:20:07,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:20:07,596 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:20:07,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386210673] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:20:07,597 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:20:07,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-10-28 09:20:07,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420931990] [2021-10-28 09:20:07,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-28 09:20:07,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:20:07,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-28 09:20:07,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-10-28 09:20:07,600 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-28 09:20:07,602 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 118 transitions, 1153 flow. Second operand has 11 states, 11 states have (on average 54.18181818181818) internal successors, (596), 11 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:07,602 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-28 09:20:07,602 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-28 09:20:07,602 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-28 09:20:07,872 INFO L129 PetriNetUnfolder]: 68/433 cut-off events. [2021-10-28 09:20:07,872 INFO L130 PetriNetUnfolder]: For 6313/6393 co-relation queries the response was YES. [2021-10-28 09:20:07,877 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1759 conditions, 433 events. 68/433 cut-off events. For 6313/6393 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 2311 event pairs, 0 based on Foata normal form. 40/429 useless extension candidates. Maximal degree in co-relation 1678. Up to 80 conditions per place. [2021-10-28 09:20:07,883 INFO L132 encePairwiseOnDemand]: 60/66 looper letters, 50 selfloop transitions, 32 changer transitions 8/134 dead transitions. [2021-10-28 09:20:07,883 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 134 transitions, 1819 flow [2021-10-28 09:20:07,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-28 09:20:07,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-10-28 09:20:07,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 948 transitions. [2021-10-28 09:20:07,886 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8449197860962567 [2021-10-28 09:20:07,886 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 948 transitions. [2021-10-28 09:20:07,886 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 948 transitions. [2021-10-28 09:20:07,887 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 09:20:07,887 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 948 transitions. [2021-10-28 09:20:07,890 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 55.76470588235294) internal successors, (948), 17 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:07,892 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 66.0) internal successors, (1188), 18 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:07,893 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 66.0) internal successors, (1188), 18 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:07,894 INFO L186 Difference]: Start difference. First operand has 163 places, 118 transitions, 1153 flow. Second operand 17 states and 948 transitions. [2021-10-28 09:20:07,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 134 transitions, 1819 flow [2021-10-28 09:20:07,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 134 transitions, 1661 flow, removed 58 selfloop flow, removed 13 redundant places. [2021-10-28 09:20:07,928 INFO L242 Difference]: Finished difference. Result has 168 places, 120 transitions, 1205 flow [2021-10-28 09:20:07,929 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=1055, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1205, PETRI_PLACES=168, PETRI_TRANSITIONS=120} [2021-10-28 09:20:07,929 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 102 predicate places. [2021-10-28 09:20:07,929 INFO L470 AbstractCegarLoop]: Abstraction has has 168 places, 120 transitions, 1205 flow [2021-10-28 09:20:07,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 54.18181818181818) internal successors, (596), 11 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:07,930 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-28 09:20:07,930 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:20:07,970 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e43e6a-0a58-4d73-beb2-0deb94959632/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-28 09:20:08,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e43e6a-0a58-4d73-beb2-0deb94959632/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-10-28 09:20:08,157 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-28 09:20:08,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:20:08,157 INFO L85 PathProgramCache]: Analyzing trace with hash 1341298320, now seen corresponding path program 7 times [2021-10-28 09:20:08,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:20:08,157 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241102575] [2021-10-28 09:20:08,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:20:08,157 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:20:08,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:20:08,313 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:20:08,314 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:20:08,314 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241102575] [2021-10-28 09:20:08,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241102575] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:20:08,314 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95313680] [2021-10-28 09:20:08,314 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-28 09:20:08,315 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:20:08,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e43e6a-0a58-4d73-beb2-0deb94959632/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:20:08,316 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e43e6a-0a58-4d73-beb2-0deb94959632/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:20:08,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e43e6a-0a58-4d73-beb2-0deb94959632/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-28 09:20:08,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:20:08,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-28 09:20:08,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:20:08,912 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:20:08,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95313680] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:20:08,912 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:20:08,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-10-28 09:20:08,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606391970] [2021-10-28 09:20:08,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-28 09:20:08,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:20:08,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-28 09:20:08,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-10-28 09:20:08,916 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-28 09:20:08,917 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 120 transitions, 1205 flow. Second operand has 12 states, 12 states have (on average 54.25) internal successors, (651), 12 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:08,917 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-28 09:20:08,917 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-28 09:20:08,917 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-28 09:20:09,285 INFO L129 PetriNetUnfolder]: 77/492 cut-off events. [2021-10-28 09:20:09,285 INFO L130 PetriNetUnfolder]: For 7370/7456 co-relation queries the response was YES. [2021-10-28 09:20:09,290 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2021 conditions, 492 events. 77/492 cut-off events. For 7370/7456 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 2815 event pairs, 0 based on Foata normal form. 43/485 useless extension candidates. Maximal degree in co-relation 1938. Up to 96 conditions per place. [2021-10-28 09:20:09,296 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 41 selfloop transitions, 52 changer transitions 8/145 dead transitions. [2021-10-28 09:20:09,296 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 145 transitions, 2051 flow [2021-10-28 09:20:09,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-28 09:20:09,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-10-28 09:20:09,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1057 transitions. [2021-10-28 09:20:09,299 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8429027113237639 [2021-10-28 09:20:09,300 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1057 transitions. [2021-10-28 09:20:09,300 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1057 transitions. [2021-10-28 09:20:09,300 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 09:20:09,301 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1057 transitions. [2021-10-28 09:20:09,303 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 55.63157894736842) internal successors, (1057), 19 states have internal predecessors, (1057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:09,306 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 66.0) internal successors, (1320), 20 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:09,307 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 66.0) internal successors, (1320), 20 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:09,307 INFO L186 Difference]: Start difference. First operand has 168 places, 120 transitions, 1205 flow. Second operand 19 states and 1057 transitions. [2021-10-28 09:20:09,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 145 transitions, 2051 flow [2021-10-28 09:20:09,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 145 transitions, 1881 flow, removed 59 selfloop flow, removed 14 redundant places. [2021-10-28 09:20:09,353 INFO L242 Difference]: Finished difference. Result has 176 places, 130 transitions, 1454 flow [2021-10-28 09:20:09,354 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=1103, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1454, PETRI_PLACES=176, PETRI_TRANSITIONS=130} [2021-10-28 09:20:09,354 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 110 predicate places. [2021-10-28 09:20:09,354 INFO L470 AbstractCegarLoop]: Abstraction has has 176 places, 130 transitions, 1454 flow [2021-10-28 09:20:09,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 54.25) internal successors, (651), 12 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:09,355 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-28 09:20:09,355 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:20:09,380 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e43e6a-0a58-4d73-beb2-0deb94959632/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-28 09:20:09,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e43e6a-0a58-4d73-beb2-0deb94959632/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-10-28 09:20:09,556 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-28 09:20:09,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:20:09,556 INFO L85 PathProgramCache]: Analyzing trace with hash -863268282, now seen corresponding path program 8 times [2021-10-28 09:20:09,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:20:09,557 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285216381] [2021-10-28 09:20:09,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:20:09,557 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:20:09,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:20:09,688 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:20:09,688 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:20:09,689 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285216381] [2021-10-28 09:20:09,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285216381] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:20:09,689 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151332901] [2021-10-28 09:20:09,689 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 09:20:09,690 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:20:09,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e43e6a-0a58-4d73-beb2-0deb94959632/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:20:09,691 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e43e6a-0a58-4d73-beb2-0deb94959632/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:20:09,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e43e6a-0a58-4d73-beb2-0deb94959632/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-28 09:20:10,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 09:20:10,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:20:10,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-28 09:20:10,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:20:10,251 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:20:10,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151332901] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:20:10,251 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:20:10,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-10-28 09:20:10,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794761159] [2021-10-28 09:20:10,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-28 09:20:10,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:20:10,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-28 09:20:10,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-10-28 09:20:10,253 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-28 09:20:10,254 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 130 transitions, 1454 flow. Second operand has 12 states, 12 states have (on average 54.166666666666664) internal successors, (650), 12 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:10,254 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-28 09:20:10,254 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-28 09:20:10,254 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-28 09:20:10,733 INFO L129 PetriNetUnfolder]: 94/577 cut-off events. [2021-10-28 09:20:10,733 INFO L130 PetriNetUnfolder]: For 10181/10302 co-relation queries the response was YES. [2021-10-28 09:20:10,741 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2587 conditions, 577 events. 94/577 cut-off events. For 10181/10302 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 3495 event pairs, 0 based on Foata normal form. 51/570 useless extension candidates. Maximal degree in co-relation 2499. Up to 120 conditions per place. [2021-10-28 09:20:10,749 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 40 selfloop transitions, 70 changer transitions 14/168 dead transitions. [2021-10-28 09:20:10,749 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 168 transitions, 2803 flow [2021-10-28 09:20:10,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-28 09:20:10,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-10-28 09:20:10,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1338 transitions. [2021-10-28 09:20:10,753 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8446969696969697 [2021-10-28 09:20:10,753 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1338 transitions. [2021-10-28 09:20:10,754 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1338 transitions. [2021-10-28 09:20:10,755 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 09:20:10,755 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1338 transitions. [2021-10-28 09:20:10,759 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 55.75) internal successors, (1338), 24 states have internal predecessors, (1338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:10,786 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 66.0) internal successors, (1650), 25 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:10,787 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 66.0) internal successors, (1650), 25 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:10,787 INFO L186 Difference]: Start difference. First operand has 176 places, 130 transitions, 1454 flow. Second operand 24 states and 1338 transitions. [2021-10-28 09:20:10,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 168 transitions, 2803 flow [2021-10-28 09:20:10,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 168 transitions, 2603 flow, removed 81 selfloop flow, removed 12 redundant places. [2021-10-28 09:20:10,841 INFO L242 Difference]: Finished difference. Result has 195 places, 147 transitions, 1980 flow [2021-10-28 09:20:10,842 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=1336, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1980, PETRI_PLACES=195, PETRI_TRANSITIONS=147} [2021-10-28 09:20:10,842 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 129 predicate places. [2021-10-28 09:20:10,843 INFO L470 AbstractCegarLoop]: Abstraction has has 195 places, 147 transitions, 1980 flow [2021-10-28 09:20:10,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 54.166666666666664) internal successors, (650), 12 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:10,843 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-28 09:20:10,844 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:20:10,888 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e43e6a-0a58-4d73-beb2-0deb94959632/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-28 09:20:11,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e43e6a-0a58-4d73-beb2-0deb94959632/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-10-28 09:20:11,057 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-28 09:20:11,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:20:11,057 INFO L85 PathProgramCache]: Analyzing trace with hash 1091792612, now seen corresponding path program 9 times [2021-10-28 09:20:11,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:20:11,058 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131700158] [2021-10-28 09:20:11,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:20:11,058 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:20:11,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:20:11,203 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:20:11,204 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:20:11,204 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131700158] [2021-10-28 09:20:11,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131700158] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:20:11,204 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30789964] [2021-10-28 09:20:11,205 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 09:20:11,205 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:20:11,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e43e6a-0a58-4d73-beb2-0deb94959632/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:20:11,206 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e43e6a-0a58-4d73-beb2-0deb94959632/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:20:11,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e43e6a-0a58-4d73-beb2-0deb94959632/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-28 09:20:11,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-28 09:20:11,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:20:11,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-28 09:20:11,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:20:11,903 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:20:11,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30789964] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:20:11,904 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:20:11,904 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-10-28 09:20:11,904 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177985015] [2021-10-28 09:20:11,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-28 09:20:11,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:20:11,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-28 09:20:11,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-10-28 09:20:11,908 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-28 09:20:11,919 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 147 transitions, 1980 flow. Second operand has 12 states, 12 states have (on average 54.166666666666664) internal successors, (650), 12 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:11,920 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-28 09:20:11,920 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-28 09:20:11,920 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-28 09:20:12,258 INFO L129 PetriNetUnfolder]: 92/582 cut-off events. [2021-10-28 09:20:12,259 INFO L130 PetriNetUnfolder]: For 13798/13923 co-relation queries the response was YES. [2021-10-28 09:20:12,266 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2782 conditions, 582 events. 92/582 cut-off events. For 13798/13923 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 3511 event pairs, 0 based on Foata normal form. 33/556 useless extension candidates. Maximal degree in co-relation 2685. Up to 116 conditions per place. [2021-10-28 09:20:12,274 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 86 selfloop transitions, 32 changer transitions 8/170 dead transitions. [2021-10-28 09:20:12,274 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 170 transitions, 2993 flow [2021-10-28 09:20:12,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-28 09:20:12,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-10-28 09:20:12,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 836 transitions. [2021-10-28 09:20:12,288 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8444444444444444 [2021-10-28 09:20:12,288 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 836 transitions. [2021-10-28 09:20:12,288 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 836 transitions. [2021-10-28 09:20:12,290 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 09:20:12,291 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 836 transitions. [2021-10-28 09:20:12,295 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 55.733333333333334) internal successors, (836), 15 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:12,299 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 66.0) internal successors, (1056), 16 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:12,299 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 66.0) internal successors, (1056), 16 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:12,300 INFO L186 Difference]: Start difference. First operand has 195 places, 147 transitions, 1980 flow. Second operand 15 states and 836 transitions. [2021-10-28 09:20:12,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 170 transitions, 2993 flow [2021-10-28 09:20:12,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 170 transitions, 2424 flow, removed 240 selfloop flow, removed 20 redundant places. [2021-10-28 09:20:12,363 INFO L242 Difference]: Finished difference. Result has 189 places, 149 transitions, 1707 flow [2021-10-28 09:20:12,364 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=1551, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1707, PETRI_PLACES=189, PETRI_TRANSITIONS=149} [2021-10-28 09:20:12,364 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 123 predicate places. [2021-10-28 09:20:12,364 INFO L470 AbstractCegarLoop]: Abstraction has has 189 places, 149 transitions, 1707 flow [2021-10-28 09:20:12,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 54.166666666666664) internal successors, (650), 12 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:12,365 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-28 09:20:12,365 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:20:12,408 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e43e6a-0a58-4d73-beb2-0deb94959632/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-28 09:20:12,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e43e6a-0a58-4d73-beb2-0deb94959632/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:20:12,578 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-28 09:20:12,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:20:12,579 INFO L85 PathProgramCache]: Analyzing trace with hash 1907855234, now seen corresponding path program 10 times [2021-10-28 09:20:12,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:20:12,579 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120502003] [2021-10-28 09:20:12,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:20:12,579 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:20:12,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:20:12,736 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:20:12,736 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:20:12,736 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120502003] [2021-10-28 09:20:12,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120502003] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:20:12,737 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818733723] [2021-10-28 09:20:12,737 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 09:20:12,737 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:20:12,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e43e6a-0a58-4d73-beb2-0deb94959632/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:20:12,739 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e43e6a-0a58-4d73-beb2-0deb94959632/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:20:12,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e43e6a-0a58-4d73-beb2-0deb94959632/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-28 09:20:13,096 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 09:20:13,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:20:13,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-28 09:20:13,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:20:13,384 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:20:13,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818733723] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:20:13,385 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:20:13,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-10-28 09:20:13,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186732059] [2021-10-28 09:20:13,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-28 09:20:13,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:20:13,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-28 09:20:13,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-10-28 09:20:13,388 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-28 09:20:13,389 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 149 transitions, 1707 flow. Second operand has 12 states, 12 states have (on average 54.166666666666664) internal successors, (650), 12 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:13,389 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-28 09:20:13,389 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-28 09:20:13,389 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-28 09:20:13,764 INFO L129 PetriNetUnfolder]: 94/607 cut-off events. [2021-10-28 09:20:13,764 INFO L130 PetriNetUnfolder]: For 11129/11238 co-relation queries the response was YES. [2021-10-28 09:20:13,772 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2571 conditions, 607 events. 94/607 cut-off events. For 11129/11238 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 3718 event pairs, 0 based on Foata normal form. 43/589 useless extension candidates. Maximal degree in co-relation 2477. Up to 108 conditions per place. [2021-10-28 09:20:13,779 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 60 selfloop transitions, 63 changer transitions 8/175 dead transitions. [2021-10-28 09:20:13,779 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 175 transitions, 2737 flow [2021-10-28 09:20:13,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-28 09:20:13,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-10-28 09:20:13,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1001 transitions. [2021-10-28 09:20:13,783 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8425925925925926 [2021-10-28 09:20:13,783 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1001 transitions. [2021-10-28 09:20:13,783 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1001 transitions. [2021-10-28 09:20:13,784 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 09:20:13,784 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1001 transitions. [2021-10-28 09:20:13,787 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 55.611111111111114) internal successors, (1001), 18 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:13,789 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 66.0) internal successors, (1254), 19 states have internal predecessors, (1254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:13,790 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 66.0) internal successors, (1254), 19 states have internal predecessors, (1254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:13,790 INFO L186 Difference]: Start difference. First operand has 189 places, 149 transitions, 1707 flow. Second operand 18 states and 1001 transitions. [2021-10-28 09:20:13,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 175 transitions, 2737 flow [2021-10-28 09:20:13,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 175 transitions, 2569 flow, removed 56 selfloop flow, removed 12 redundant places. [2021-10-28 09:20:13,847 INFO L242 Difference]: Finished difference. Result has 196 places, 151 transitions, 1829 flow [2021-10-28 09:20:13,848 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=1597, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1829, PETRI_PLACES=196, PETRI_TRANSITIONS=151} [2021-10-28 09:20:13,848 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 130 predicate places. [2021-10-28 09:20:13,848 INFO L470 AbstractCegarLoop]: Abstraction has has 196 places, 151 transitions, 1829 flow [2021-10-28 09:20:13,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 54.166666666666664) internal successors, (650), 12 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:13,849 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-28 09:20:13,849 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:20:13,893 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e43e6a-0a58-4d73-beb2-0deb94959632/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-10-28 09:20:14,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e43e6a-0a58-4d73-beb2-0deb94959632/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:20:14,073 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-28 09:20:14,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:20:14,073 INFO L85 PathProgramCache]: Analyzing trace with hash -1754475826, now seen corresponding path program 11 times [2021-10-28 09:20:14,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:20:14,073 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498975234] [2021-10-28 09:20:14,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:20:14,074 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:20:14,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:20:14,241 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:20:14,241 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:20:14,241 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498975234] [2021-10-28 09:20:14,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498975234] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:20:14,242 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415955227] [2021-10-28 09:20:14,242 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 09:20:14,242 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:20:14,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e43e6a-0a58-4d73-beb2-0deb94959632/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:20:14,244 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e43e6a-0a58-4d73-beb2-0deb94959632/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:20:14,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e43e6a-0a58-4d73-beb2-0deb94959632/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-28 09:20:14,763 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-28 09:20:14,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:20:14,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-28 09:20:14,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:20:15,082 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:20:15,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415955227] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:20:15,082 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:20:15,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-10-28 09:20:15,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210524393] [2021-10-28 09:20:15,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-28 09:20:15,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:20:15,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-28 09:20:15,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-10-28 09:20:15,086 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-28 09:20:15,087 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 151 transitions, 1829 flow. Second operand has 13 states, 13 states have (on average 54.23076923076923) internal successors, (705), 13 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:15,087 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-28 09:20:15,088 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-28 09:20:15,088 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-28 09:20:15,598 INFO L129 PetriNetUnfolder]: 97/620 cut-off events. [2021-10-28 09:20:15,599 INFO L130 PetriNetUnfolder]: For 11991/12114 co-relation queries the response was YES. [2021-10-28 09:20:15,607 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2729 conditions, 620 events. 97/620 cut-off events. For 11991/12114 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 3833 event pairs, 0 based on Foata normal form. 54/612 useless extension candidates. Maximal degree in co-relation 2633. Up to 114 conditions per place. [2021-10-28 09:20:15,615 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 45 selfloop transitions, 83 changer transitions 8/180 dead transitions. [2021-10-28 09:20:15,615 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 180 transitions, 2989 flow [2021-10-28 09:20:15,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-28 09:20:15,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-10-28 09:20:15,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1168 transitions. [2021-10-28 09:20:15,622 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8427128427128427 [2021-10-28 09:20:15,622 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1168 transitions. [2021-10-28 09:20:15,622 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1168 transitions. [2021-10-28 09:20:15,624 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 09:20:15,624 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1168 transitions. [2021-10-28 09:20:15,630 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 55.61904761904762) internal successors, (1168), 21 states have internal predecessors, (1168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:15,632 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 66.0) internal successors, (1452), 22 states have internal predecessors, (1452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:15,633 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 66.0) internal successors, (1452), 22 states have internal predecessors, (1452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:15,633 INFO L186 Difference]: Start difference. First operand has 196 places, 151 transitions, 1829 flow. Second operand 21 states and 1168 transitions. [2021-10-28 09:20:15,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 180 transitions, 2989 flow [2021-10-28 09:20:15,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 180 transitions, 2743 flow, removed 70 selfloop flow, removed 15 redundant places. [2021-10-28 09:20:15,694 INFO L242 Difference]: Finished difference. Result has 204 places, 156 transitions, 2025 flow [2021-10-28 09:20:15,694 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=1667, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2025, PETRI_PLACES=204, PETRI_TRANSITIONS=156} [2021-10-28 09:20:15,694 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 138 predicate places. [2021-10-28 09:20:15,695 INFO L470 AbstractCegarLoop]: Abstraction has has 204 places, 156 transitions, 2025 flow [2021-10-28 09:20:15,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 54.23076923076923) internal successors, (705), 13 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:15,695 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-28 09:20:15,696 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:20:15,732 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e43e6a-0a58-4d73-beb2-0deb94959632/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-10-28 09:20:15,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e43e6a-0a58-4d73-beb2-0deb94959632/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-10-28 09:20:15,909 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-28 09:20:15,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:20:15,909 INFO L85 PathProgramCache]: Analyzing trace with hash 335924868, now seen corresponding path program 12 times [2021-10-28 09:20:15,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:20:15,909 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720881922] [2021-10-28 09:20:15,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:20:15,910 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:20:15,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:20:16,035 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:20:16,035 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:20:16,035 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720881922] [2021-10-28 09:20:16,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720881922] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:20:16,036 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034223638] [2021-10-28 09:20:16,036 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-28 09:20:16,036 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:20:16,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e43e6a-0a58-4d73-beb2-0deb94959632/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:20:16,038 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e43e6a-0a58-4d73-beb2-0deb94959632/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:20:16,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e43e6a-0a58-4d73-beb2-0deb94959632/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-10-28 09:20:16,612 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-10-28 09:20:16,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:20:16,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-28 09:20:16,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:20:16,870 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:20:16,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034223638] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:20:16,870 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:20:16,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-10-28 09:20:16,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667407115] [2021-10-28 09:20:16,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-28 09:20:16,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:20:16,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-28 09:20:16,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-10-28 09:20:16,873 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-28 09:20:16,874 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 156 transitions, 2025 flow. Second operand has 13 states, 13 states have (on average 54.15384615384615) internal successors, (704), 13 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:16,874 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-28 09:20:16,874 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-28 09:20:16,874 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-28 09:20:17,466 INFO L129 PetriNetUnfolder]: 109/689 cut-off events. [2021-10-28 09:20:17,467 INFO L130 PetriNetUnfolder]: For 15371/15481 co-relation queries the response was YES. [2021-10-28 09:20:17,477 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3234 conditions, 689 events. 109/689 cut-off events. For 15371/15481 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 4322 event pairs, 0 based on Foata normal form. 69/690 useless extension candidates. Maximal degree in co-relation 3135. Up to 130 conditions per place. [2021-10-28 09:20:17,486 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 39 selfloop transitions, 100 changer transitions 14/197 dead transitions. [2021-10-28 09:20:17,486 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 197 transitions, 3746 flow [2021-10-28 09:20:17,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-28 09:20:17,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-10-28 09:20:17,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1449 transitions. [2021-10-28 09:20:17,490 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8444055944055944 [2021-10-28 09:20:17,491 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1449 transitions. [2021-10-28 09:20:17,491 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1449 transitions. [2021-10-28 09:20:17,492 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 09:20:17,492 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1449 transitions. [2021-10-28 09:20:17,496 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 55.73076923076923) internal successors, (1449), 26 states have internal predecessors, (1449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:17,500 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 66.0) internal successors, (1782), 27 states have internal predecessors, (1782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:17,501 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 66.0) internal successors, (1782), 27 states have internal predecessors, (1782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:17,501 INFO L186 Difference]: Start difference. First operand has 204 places, 156 transitions, 2025 flow. Second operand 26 states and 1449 transitions. [2021-10-28 09:20:17,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 197 transitions, 3746 flow [2021-10-28 09:20:17,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 197 transitions, 3424 flow, removed 96 selfloop flow, removed 17 redundant places. [2021-10-28 09:20:17,592 INFO L242 Difference]: Finished difference. Result has 220 places, 168 transitions, 2440 flow [2021-10-28 09:20:17,593 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=1797, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=2440, PETRI_PLACES=220, PETRI_TRANSITIONS=168} [2021-10-28 09:20:17,593 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 154 predicate places. [2021-10-28 09:20:17,593 INFO L470 AbstractCegarLoop]: Abstraction has has 220 places, 168 transitions, 2440 flow [2021-10-28 09:20:17,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 54.15384615384615) internal successors, (704), 13 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:17,594 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-28 09:20:17,595 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:20:17,643 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e43e6a-0a58-4d73-beb2-0deb94959632/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-10-28 09:20:17,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e43e6a-0a58-4d73-beb2-0deb94959632/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-10-28 09:20:17,817 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-28 09:20:17,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:20:17,817 INFO L85 PathProgramCache]: Analyzing trace with hash 1777423792, now seen corresponding path program 13 times [2021-10-28 09:20:17,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:20:17,818 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630492192] [2021-10-28 09:20:17,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:20:17,818 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:20:17,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:20:17,956 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-28 09:20:17,956 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:20:17,957 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630492192] [2021-10-28 09:20:17,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630492192] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:20:17,957 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126496822] [2021-10-28 09:20:17,957 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-28 09:20:17,958 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:20:17,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e43e6a-0a58-4d73-beb2-0deb94959632/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:20:17,959 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e43e6a-0a58-4d73-beb2-0deb94959632/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:20:17,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e43e6a-0a58-4d73-beb2-0deb94959632/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-10-28 09:20:18,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:20:18,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-28 09:20:18,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:20:18,924 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-28 09:20:18,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126496822] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:20:18,924 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:20:18,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-10-28 09:20:18,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316418564] [2021-10-28 09:20:18,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-28 09:20:18,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:20:18,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-28 09:20:18,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-10-28 09:20:18,929 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-28 09:20:18,930 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 168 transitions, 2440 flow. Second operand has 13 states, 13 states have (on average 54.23076923076923) internal successors, (705), 13 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:18,931 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-28 09:20:18,931 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-28 09:20:18,931 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-28 09:20:19,493 INFO L129 PetriNetUnfolder]: 122/762 cut-off events. [2021-10-28 09:20:19,494 INFO L130 PetriNetUnfolder]: For 26429/26580 co-relation queries the response was YES. [2021-10-28 09:20:19,505 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4068 conditions, 762 events. 122/762 cut-off events. For 26429/26580 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 5001 event pairs, 0 based on Foata normal form. 77/764 useless extension candidates. Maximal degree in co-relation 3961. Up to 148 conditions per place. [2021-10-28 09:20:19,517 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 61 selfloop transitions, 89 changer transitions 11/205 dead transitions. [2021-10-28 09:20:19,517 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 205 transitions, 4207 flow [2021-10-28 09:20:19,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-28 09:20:19,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-10-28 09:20:19,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1337 transitions. [2021-10-28 09:20:19,521 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8440656565656566 [2021-10-28 09:20:19,521 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1337 transitions. [2021-10-28 09:20:19,521 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1337 transitions. [2021-10-28 09:20:19,522 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 09:20:19,523 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1337 transitions. [2021-10-28 09:20:19,526 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 55.708333333333336) internal successors, (1337), 24 states have internal predecessors, (1337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:19,529 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 66.0) internal successors, (1650), 25 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:19,530 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 66.0) internal successors, (1650), 25 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:19,530 INFO L186 Difference]: Start difference. First operand has 220 places, 168 transitions, 2440 flow. Second operand 24 states and 1337 transitions. [2021-10-28 09:20:19,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 205 transitions, 4207 flow [2021-10-28 09:20:19,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 205 transitions, 3716 flow, removed 181 selfloop flow, removed 17 redundant places. [2021-10-28 09:20:19,736 INFO L242 Difference]: Finished difference. Result has 229 places, 186 transitions, 2825 flow [2021-10-28 09:20:19,737 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=2056, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=2825, PETRI_PLACES=229, PETRI_TRANSITIONS=186} [2021-10-28 09:20:19,737 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 163 predicate places. [2021-10-28 09:20:19,738 INFO L470 AbstractCegarLoop]: Abstraction has has 229 places, 186 transitions, 2825 flow [2021-10-28 09:20:19,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 54.23076923076923) internal successors, (705), 13 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:19,738 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-28 09:20:19,738 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:20:19,783 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e43e6a-0a58-4d73-beb2-0deb94959632/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-10-28 09:20:19,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e43e6a-0a58-4d73-beb2-0deb94959632/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:20:19,965 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-28 09:20:19,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:20:19,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1801962500, now seen corresponding path program 14 times [2021-10-28 09:20:19,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:20:19,966 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991532551] [2021-10-28 09:20:19,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:20:19,966 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:20:19,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:20:20,131 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-28 09:20:20,131 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:20:20,131 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991532551] [2021-10-28 09:20:20,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991532551] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:20:20,132 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820647725] [2021-10-28 09:20:20,132 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 09:20:20,132 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:20:20,133 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e43e6a-0a58-4d73-beb2-0deb94959632/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:20:20,134 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e43e6a-0a58-4d73-beb2-0deb94959632/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:20:20,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e43e6a-0a58-4d73-beb2-0deb94959632/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-10-28 09:20:20,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 09:20:20,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:20:20,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-28 09:20:20,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:20:21,066 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-28 09:20:21,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820647725] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:20:21,067 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:20:21,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-10-28 09:20:21,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455723228] [2021-10-28 09:20:21,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-28 09:20:21,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:20:21,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-28 09:20:21,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-10-28 09:20:21,070 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-28 09:20:21,071 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 186 transitions, 2825 flow. Second operand has 14 states, 14 states have (on average 54.214285714285715) internal successors, (759), 14 states have internal predecessors, (759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:21,071 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-28 09:20:21,072 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-28 09:20:21,072 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-28 09:20:21,688 INFO L129 PetriNetUnfolder]: 129/816 cut-off events. [2021-10-28 09:20:21,688 INFO L130 PetriNetUnfolder]: For 29326/29457 co-relation queries the response was YES. [2021-10-28 09:20:21,696 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4363 conditions, 816 events. 129/816 cut-off events. For 29326/29457 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 5364 event pairs, 0 based on Foata normal form. 78/813 useless extension candidates. Maximal degree in co-relation 4251. Up to 154 conditions per place. [2021-10-28 09:20:21,709 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 49 selfloop transitions, 120 changer transitions 11/224 dead transitions. [2021-10-28 09:20:21,709 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 224 transitions, 4867 flow [2021-10-28 09:20:21,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-28 09:20:21,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-10-28 09:20:21,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1337 transitions. [2021-10-28 09:20:21,714 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8440656565656566 [2021-10-28 09:20:21,714 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1337 transitions. [2021-10-28 09:20:21,715 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1337 transitions. [2021-10-28 09:20:21,716 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 09:20:21,716 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1337 transitions. [2021-10-28 09:20:21,719 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 55.708333333333336) internal successors, (1337), 24 states have internal predecessors, (1337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:21,723 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 66.0) internal successors, (1650), 25 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:21,723 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 66.0) internal successors, (1650), 25 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:21,724 INFO L186 Difference]: Start difference. First operand has 229 places, 186 transitions, 2825 flow. Second operand 24 states and 1337 transitions. [2021-10-28 09:20:21,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 224 transitions, 4867 flow [2021-10-28 09:20:21,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 224 transitions, 4201 flow, removed 275 selfloop flow, removed 22 redundant places. [2021-10-28 09:20:21,835 INFO L242 Difference]: Finished difference. Result has 235 places, 197 transitions, 3092 flow [2021-10-28 09:20:21,836 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=2399, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=3092, PETRI_PLACES=235, PETRI_TRANSITIONS=197} [2021-10-28 09:20:21,836 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 169 predicate places. [2021-10-28 09:20:21,836 INFO L470 AbstractCegarLoop]: Abstraction has has 235 places, 197 transitions, 3092 flow [2021-10-28 09:20:21,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 54.214285714285715) internal successors, (759), 14 states have internal predecessors, (759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:21,837 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-28 09:20:21,837 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:20:21,865 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e43e6a-0a58-4d73-beb2-0deb94959632/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-10-28 09:20:22,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e43e6a-0a58-4d73-beb2-0deb94959632/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-10-28 09:20:22,045 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-28 09:20:22,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:20:22,046 INFO L85 PathProgramCache]: Analyzing trace with hash 910431551, now seen corresponding path program 15 times [2021-10-28 09:20:22,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:20:22,046 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373999652] [2021-10-28 09:20:22,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:20:22,047 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:20:22,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:20:22,219 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:20:22,219 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:20:22,219 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373999652] [2021-10-28 09:20:22,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373999652] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:20:22,220 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311084738] [2021-10-28 09:20:22,220 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 09:20:22,221 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:20:22,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e43e6a-0a58-4d73-beb2-0deb94959632/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:20:22,222 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e43e6a-0a58-4d73-beb2-0deb94959632/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:20:22,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e43e6a-0a58-4d73-beb2-0deb94959632/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-10-28 09:20:22,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-28 09:20:22,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:20:22,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-28 09:20:22,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:20:22,998 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:20:22,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311084738] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:20:22,999 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:20:22,999 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-10-28 09:20:22,999 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203291581] [2021-10-28 09:20:23,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-28 09:20:23,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:20:23,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-28 09:20:23,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-10-28 09:20:23,002 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-28 09:20:23,003 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 197 transitions, 3092 flow. Second operand has 15 states, 15 states have (on average 54.13333333333333) internal successors, (812), 15 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:23,003 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-28 09:20:23,004 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-28 09:20:23,004 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-28 09:20:23,761 INFO L129 PetriNetUnfolder]: 151/946 cut-off events. [2021-10-28 09:20:23,761 INFO L130 PetriNetUnfolder]: For 37811/37978 co-relation queries the response was YES. [2021-10-28 09:20:23,774 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5340 conditions, 946 events. 151/946 cut-off events. For 37811/37978 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 6360 event pairs, 0 based on Foata normal form. 83/934 useless extension candidates. Maximal degree in co-relation 5227. Up to 178 conditions per place. [2021-10-28 09:20:23,790 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 68 selfloop transitions, 119 changer transitions 14/245 dead transitions. [2021-10-28 09:20:23,790 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 245 transitions, 5657 flow [2021-10-28 09:20:23,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-28 09:20:23,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-10-28 09:20:23,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1616 transitions. [2021-10-28 09:20:23,797 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8443051201671892 [2021-10-28 09:20:23,797 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1616 transitions. [2021-10-28 09:20:23,797 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1616 transitions. [2021-10-28 09:20:23,799 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 09:20:23,800 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1616 transitions. [2021-10-28 09:20:23,805 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 55.724137931034484) internal successors, (1616), 29 states have internal predecessors, (1616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:23,813 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 66.0) internal successors, (1980), 30 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:23,813 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 66.0) internal successors, (1980), 30 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:23,814 INFO L186 Difference]: Start difference. First operand has 235 places, 197 transitions, 3092 flow. Second operand 29 states and 1616 transitions. [2021-10-28 09:20:23,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 245 transitions, 5657 flow [2021-10-28 09:20:23,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 245 transitions, 5112 flow, removed 190 selfloop flow, removed 17 redundant places. [2021-10-28 09:20:23,967 INFO L242 Difference]: Finished difference. Result has 253 places, 221 transitions, 3895 flow [2021-10-28 09:20:23,968 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=2668, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=3895, PETRI_PLACES=253, PETRI_TRANSITIONS=221} [2021-10-28 09:20:23,968 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 187 predicate places. [2021-10-28 09:20:23,969 INFO L470 AbstractCegarLoop]: Abstraction has has 253 places, 221 transitions, 3895 flow [2021-10-28 09:20:23,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 54.13333333333333) internal successors, (812), 15 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:23,969 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-28 09:20:23,970 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:20:24,003 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e43e6a-0a58-4d73-beb2-0deb94959632/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-10-28 09:20:24,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e43e6a-0a58-4d73-beb2-0deb94959632/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-10-28 09:20:24,182 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-28 09:20:24,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:20:24,182 INFO L85 PathProgramCache]: Analyzing trace with hash 1848776937, now seen corresponding path program 16 times [2021-10-28 09:20:24,183 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:20:24,183 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649136448] [2021-10-28 09:20:24,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:20:24,183 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:20:24,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:20:24,364 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:20:24,364 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:20:24,365 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649136448] [2021-10-28 09:20:24,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649136448] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:20:24,365 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290446962] [2021-10-28 09:20:24,365 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 09:20:24,365 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:20:24,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e43e6a-0a58-4d73-beb2-0deb94959632/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:20:24,367 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e43e6a-0a58-4d73-beb2-0deb94959632/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:20:24,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e43e6a-0a58-4d73-beb2-0deb94959632/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-10-28 09:20:24,891 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 09:20:24,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:20:24,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-28 09:20:24,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:20:25,194 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:20:25,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290446962] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:20:25,195 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:20:25,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-10-28 09:20:25,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562282887] [2021-10-28 09:20:25,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-28 09:20:25,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:20:25,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-28 09:20:25,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-10-28 09:20:25,198 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-28 09:20:25,199 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 221 transitions, 3895 flow. Second operand has 16 states, 16 states have (on average 54.125) internal successors, (866), 16 states have internal predecessors, (866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:25,199 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-28 09:20:25,199 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-28 09:20:25,199 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-28 09:20:26,030 INFO L129 PetriNetUnfolder]: 161/1005 cut-off events. [2021-10-28 09:20:26,030 INFO L130 PetriNetUnfolder]: For 50082/50280 co-relation queries the response was YES. [2021-10-28 09:20:26,045 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6065 conditions, 1005 events. 161/1005 cut-off events. For 50082/50280 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 6761 event pairs, 0 based on Foata normal form. 83/988 useless extension candidates. Maximal degree in co-relation 5944. Up to 188 conditions per place. [2021-10-28 09:20:26,060 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 61 selfloop transitions, 150 changer transitions 14/269 dead transitions. [2021-10-28 09:20:26,061 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 269 transitions, 6877 flow [2021-10-28 09:20:26,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-28 09:20:26,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-10-28 09:20:26,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1616 transitions. [2021-10-28 09:20:26,065 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8443051201671892 [2021-10-28 09:20:26,066 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1616 transitions. [2021-10-28 09:20:26,066 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1616 transitions. [2021-10-28 09:20:26,067 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 09:20:26,067 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1616 transitions. [2021-10-28 09:20:26,071 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 55.724137931034484) internal successors, (1616), 29 states have internal predecessors, (1616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:26,074 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 66.0) internal successors, (1980), 30 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:26,075 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 66.0) internal successors, (1980), 30 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:26,075 INFO L186 Difference]: Start difference. First operand has 253 places, 221 transitions, 3895 flow. Second operand 29 states and 1616 transitions. [2021-10-28 09:20:26,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 269 transitions, 6877 flow [2021-10-28 09:20:26,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 269 transitions, 5783 flow, removed 480 selfloop flow, removed 23 redundant places. [2021-10-28 09:20:26,244 INFO L242 Difference]: Finished difference. Result has 265 places, 235 transitions, 4128 flow [2021-10-28 09:20:26,244 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=3159, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=4128, PETRI_PLACES=265, PETRI_TRANSITIONS=235} [2021-10-28 09:20:26,245 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 199 predicate places. [2021-10-28 09:20:26,245 INFO L470 AbstractCegarLoop]: Abstraction has has 265 places, 235 transitions, 4128 flow [2021-10-28 09:20:26,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 54.125) internal successors, (866), 16 states have internal predecessors, (866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:26,245 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-28 09:20:26,246 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:20:26,277 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e43e6a-0a58-4d73-beb2-0deb94959632/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-10-28 09:20:26,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e43e6a-0a58-4d73-beb2-0deb94959632/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:20:26,461 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-28 09:20:26,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:20:26,461 INFO L85 PathProgramCache]: Analyzing trace with hash 1430628198, now seen corresponding path program 17 times [2021-10-28 09:20:26,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:20:26,461 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115387406] [2021-10-28 09:20:26,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:20:26,462 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:20:26,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:20:26,639 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:20:26,639 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:20:26,640 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115387406] [2021-10-28 09:20:26,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115387406] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:20:26,640 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932717037] [2021-10-28 09:20:26,640 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 09:20:26,640 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:20:26,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e43e6a-0a58-4d73-beb2-0deb94959632/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:20:26,642 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e43e6a-0a58-4d73-beb2-0deb94959632/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:20:26,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e43e6a-0a58-4d73-beb2-0deb94959632/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-10-28 09:20:27,208 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-10-28 09:20:27,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:20:27,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-28 09:20:27,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:20:27,586 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:20:27,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932717037] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:20:27,586 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:20:27,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-10-28 09:20:27,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816498081] [2021-10-28 09:20:27,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-28 09:20:27,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:20:27,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-28 09:20:27,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-10-28 09:20:27,589 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-28 09:20:27,590 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 235 transitions, 4128 flow. Second operand has 17 states, 17 states have (on average 54.11764705882353) internal successors, (920), 17 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:27,590 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-28 09:20:27,590 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-28 09:20:27,590 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-28 09:20:28,448 INFO L129 PetriNetUnfolder]: 171/1071 cut-off events. [2021-10-28 09:20:28,448 INFO L130 PetriNetUnfolder]: For 62041/62243 co-relation queries the response was YES. [2021-10-28 09:20:28,462 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6609 conditions, 1071 events. 171/1071 cut-off events. For 62041/62243 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 7174 event pairs, 0 based on Foata normal form. 86/1049 useless extension candidates. Maximal degree in co-relation 6484. Up to 178 conditions per place. [2021-10-28 09:20:28,483 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 65 selfloop transitions, 152 changer transitions 14/275 dead transitions. [2021-10-28 09:20:28,483 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 275 transitions, 7102 flow [2021-10-28 09:20:28,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-10-28 09:20:28,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-10-28 09:20:28,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1838 transitions. [2021-10-28 09:20:28,488 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8438934802571166 [2021-10-28 09:20:28,488 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1838 transitions. [2021-10-28 09:20:28,488 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1838 transitions. [2021-10-28 09:20:28,489 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 09:20:28,489 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1838 transitions. [2021-10-28 09:20:28,493 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 55.696969696969695) internal successors, (1838), 33 states have internal predecessors, (1838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:28,496 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 66.0) internal successors, (2244), 34 states have internal predecessors, (2244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:28,497 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 66.0) internal successors, (2244), 34 states have internal predecessors, (2244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:28,497 INFO L186 Difference]: Start difference. First operand has 265 places, 235 transitions, 4128 flow. Second operand 33 states and 1838 transitions. [2021-10-28 09:20:28,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 275 transitions, 7102 flow [2021-10-28 09:20:28,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 275 transitions, 6322 flow, removed 284 selfloop flow, removed 20 redundant places. [2021-10-28 09:20:28,720 INFO L242 Difference]: Finished difference. Result has 283 places, 249 transitions, 4657 flow [2021-10-28 09:20:28,721 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=3506, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=4657, PETRI_PLACES=283, PETRI_TRANSITIONS=249} [2021-10-28 09:20:28,721 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 217 predicate places. [2021-10-28 09:20:28,722 INFO L470 AbstractCegarLoop]: Abstraction has has 283 places, 249 transitions, 4657 flow [2021-10-28 09:20:28,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 54.11764705882353) internal successors, (920), 17 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:28,722 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-28 09:20:28,723 INFO L254 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:20:28,758 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e43e6a-0a58-4d73-beb2-0deb94959632/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-10-28 09:20:28,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e43e6a-0a58-4d73-beb2-0deb94959632/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-10-28 09:20:28,949 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-28 09:20:28,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:20:28,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1334764032, now seen corresponding path program 18 times [2021-10-28 09:20:28,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:20:28,949 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940265318] [2021-10-28 09:20:28,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:20:28,950 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:20:28,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:20:29,071 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 72 proven. 21 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-28 09:20:29,071 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:20:29,072 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940265318] [2021-10-28 09:20:29,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940265318] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:20:29,072 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004704024] [2021-10-28 09:20:29,072 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-28 09:20:29,072 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:20:29,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e43e6a-0a58-4d73-beb2-0deb94959632/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:20:29,074 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e43e6a-0a58-4d73-beb2-0deb94959632/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:20:29,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e43e6a-0a58-4d73-beb2-0deb94959632/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-10-28 09:20:29,750 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-10-28 09:20:29,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:20:29,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-28 09:20:29,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:20:30,032 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-28 09:20:30,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004704024] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:20:30,033 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-28 09:20:30,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [13] total 15 [2021-10-28 09:20:30,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912286143] [2021-10-28 09:20:30,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-28 09:20:30,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:20:30,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-28 09:20:30,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-10-28 09:20:30,035 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 66 [2021-10-28 09:20:30,037 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 249 transitions, 4657 flow. Second operand has 13 states, 13 states have (on average 56.76923076923077) internal successors, (738), 13 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:30,037 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-28 09:20:30,037 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 66 [2021-10-28 09:20:30,037 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-28 09:20:31,180 INFO L129 PetriNetUnfolder]: 435/2584 cut-off events. [2021-10-28 09:20:31,180 INFO L130 PetriNetUnfolder]: For 99560/99685 co-relation queries the response was YES. [2021-10-28 09:20:31,217 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12586 conditions, 2584 events. 435/2584 cut-off events. For 99560/99685 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 24272 event pairs, 74 based on Foata normal form. 58/2387 useless extension candidates. Maximal degree in co-relation 12456. Up to 365 conditions per place. [2021-10-28 09:20:31,237 INFO L132 encePairwiseOnDemand]: 60/66 looper letters, 7 selfloop transitions, 21 changer transitions 0/264 dead transitions. [2021-10-28 09:20:31,237 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 264 transitions, 4511 flow [2021-10-28 09:20:31,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-28 09:20:31,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-10-28 09:20:31,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1019 transitions. [2021-10-28 09:20:31,241 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8577441077441077 [2021-10-28 09:20:31,241 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1019 transitions. [2021-10-28 09:20:31,241 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1019 transitions. [2021-10-28 09:20:31,242 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 09:20:31,242 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1019 transitions. [2021-10-28 09:20:31,245 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 56.611111111111114) internal successors, (1019), 18 states have internal predecessors, (1019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:31,248 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 66.0) internal successors, (1254), 19 states have internal predecessors, (1254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:31,248 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 66.0) internal successors, (1254), 19 states have internal predecessors, (1254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:31,248 INFO L186 Difference]: Start difference. First operand has 283 places, 249 transitions, 4657 flow. Second operand 18 states and 1019 transitions. [2021-10-28 09:20:31,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 264 transitions, 4511 flow [2021-10-28 09:20:31,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 264 transitions, 3697 flow, removed 309 selfloop flow, removed 25 redundant places. [2021-10-28 09:20:31,540 INFO L242 Difference]: Finished difference. Result has 271 places, 260 transitions, 3685 flow [2021-10-28 09:20:31,541 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=3599, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=3685, PETRI_PLACES=271, PETRI_TRANSITIONS=260} [2021-10-28 09:20:31,541 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 205 predicate places. [2021-10-28 09:20:31,541 INFO L470 AbstractCegarLoop]: Abstraction has has 271 places, 260 transitions, 3685 flow [2021-10-28 09:20:31,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 56.76923076923077) internal successors, (738), 13 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:31,542 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-28 09:20:31,542 INFO L254 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:20:31,569 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e43e6a-0a58-4d73-beb2-0deb94959632/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-10-28 09:20:31,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e43e6a-0a58-4d73-beb2-0deb94959632/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-10-28 09:20:31,744 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-28 09:20:31,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:20:31,744 INFO L85 PathProgramCache]: Analyzing trace with hash -101909755, now seen corresponding path program 19 times [2021-10-28 09:20:31,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:20:31,745 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607112412] [2021-10-28 09:20:31,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:20:31,745 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:20:31,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:20:31,869 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 62 proven. 32 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-28 09:20:31,869 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:20:31,869 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607112412] [2021-10-28 09:20:31,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607112412] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:20:31,870 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263491951] [2021-10-28 09:20:31,870 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-28 09:20:31,870 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:20:31,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e43e6a-0a58-4d73-beb2-0deb94959632/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:20:31,871 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e43e6a-0a58-4d73-beb2-0deb94959632/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:20:31,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e43e6a-0a58-4d73-beb2-0deb94959632/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-10-28 09:20:32,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:20:32,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-28 09:20:32,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:20:32,963 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 94 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-28 09:20:32,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263491951] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:20:32,964 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-28 09:20:32,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [13] total 15 [2021-10-28 09:20:32,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709483630] [2021-10-28 09:20:32,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-28 09:20:32,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:20:32,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-28 09:20:32,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-10-28 09:20:32,967 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 66 [2021-10-28 09:20:32,968 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 260 transitions, 3685 flow. Second operand has 13 states, 13 states have (on average 56.76923076923077) internal successors, (738), 13 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:32,969 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-28 09:20:32,969 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 66 [2021-10-28 09:20:32,969 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-28 09:20:35,590 INFO L129 PetriNetUnfolder]: 1419/7124 cut-off events. [2021-10-28 09:20:35,590 INFO L130 PetriNetUnfolder]: For 282384/282687 co-relation queries the response was YES. [2021-10-28 09:20:35,690 INFO L84 FinitePrefix]: Finished finitePrefix Result has 36081 conditions, 7124 events. 1419/7124 cut-off events. For 282384/282687 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 85923 event pairs, 272 based on Foata normal form. 191/7017 useless extension candidates. Maximal degree in co-relation 35966. Up to 945 conditions per place. [2021-10-28 09:20:35,697 INFO L132 encePairwiseOnDemand]: 60/66 looper letters, 0 selfloop transitions, 0 changer transitions 263/263 dead transitions. [2021-10-28 09:20:35,698 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 263 transitions, 3501 flow [2021-10-28 09:20:35,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-28 09:20:35,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-10-28 09:20:35,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1019 transitions. [2021-10-28 09:20:35,701 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8577441077441077 [2021-10-28 09:20:35,701 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1019 transitions. [2021-10-28 09:20:35,701 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1019 transitions. [2021-10-28 09:20:35,702 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 09:20:35,702 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1019 transitions. [2021-10-28 09:20:35,704 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 56.611111111111114) internal successors, (1019), 18 states have internal predecessors, (1019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:35,707 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 66.0) internal successors, (1254), 19 states have internal predecessors, (1254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:35,707 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 66.0) internal successors, (1254), 19 states have internal predecessors, (1254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:35,707 INFO L186 Difference]: Start difference. First operand has 271 places, 260 transitions, 3685 flow. Second operand 18 states and 1019 transitions. [2021-10-28 09:20:35,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 263 transitions, 3501 flow [2021-10-28 09:20:36,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 263 transitions, 3125 flow, removed 44 selfloop flow, removed 24 redundant places. [2021-10-28 09:20:36,248 INFO L242 Difference]: Finished difference. Result has 261 places, 0 transitions, 0 flow [2021-10-28 09:20:36,248 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=3027, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=0, PETRI_PLACES=261, PETRI_TRANSITIONS=0} [2021-10-28 09:20:36,249 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 195 predicate places. [2021-10-28 09:20:36,249 INFO L470 AbstractCegarLoop]: Abstraction has has 261 places, 0 transitions, 0 flow [2021-10-28 09:20:36,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 56.76923076923077) internal successors, (738), 13 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:36,252 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-28 09:20:36,253 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION [2021-10-28 09:20:36,253 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION [2021-10-28 09:20:36,279 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e43e6a-0a58-4d73-beb2-0deb94959632/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-10-28 09:20:36,453 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e43e6a-0a58-4d73-beb2-0deb94959632/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-10-28 09:20:36,457 INFO L731 BasicCegarLoop]: Path program histogram: [19, 4, 2, 2, 1, 1] [2021-10-28 09:20:36,460 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-10-28 09:20:36,461 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-28 09:20:36,463 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 09:20:36 BasicIcfg [2021-10-28 09:20:36,464 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-28 09:20:36,464 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-28 09:20:36,464 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-28 09:20:36,465 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-28 09:20:36,465 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:19:53" (3/4) ... [2021-10-28 09:20:36,469 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-28 09:20:36,477 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure t1 [2021-10-28 09:20:36,477 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure t2 [2021-10-28 09:20:36,482 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2021-10-28 09:20:36,482 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-28 09:20:36,482 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-10-28 09:20:36,483 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-28 09:20:36,516 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e43e6a-0a58-4d73-beb2-0deb94959632/bin/uautomizer-UnR33cPsHg/witness.graphml [2021-10-28 09:20:36,516 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-28 09:20:36,518 INFO L168 Benchmark]: Toolchain (without parser) took 44069.61 ms. Allocated memory was 77.6 MB in the beginning and 616.6 MB in the end (delta: 539.0 MB). Free memory was 52.3 MB in the beginning and 324.3 MB in the end (delta: -272.1 MB). Peak memory consumption was 266.3 MB. Max. memory is 16.1 GB. [2021-10-28 09:20:36,518 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 77.6 MB. Free memory is still 50.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 09:20:36,519 INFO L168 Benchmark]: CACSL2BoogieTranslator took 613.98 ms. Allocated memory was 77.6 MB in the beginning and 96.5 MB in the end (delta: 18.9 MB). Free memory was 52.0 MB in the beginning and 61.0 MB in the end (delta: -9.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-28 09:20:36,519 INFO L168 Benchmark]: Boogie Procedure Inliner took 49.00 ms. Allocated memory is still 96.5 MB. Free memory was 61.0 MB in the beginning and 59.1 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 09:20:36,520 INFO L168 Benchmark]: Boogie Preprocessor took 35.21 ms. Allocated memory is still 96.5 MB. Free memory was 59.1 MB in the beginning and 57.7 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 09:20:36,520 INFO L168 Benchmark]: RCFGBuilder took 532.20 ms. Allocated memory is still 96.5 MB. Free memory was 57.7 MB in the beginning and 71.3 MB in the end (delta: -13.6 MB). Peak memory consumption was 12.8 MB. Max. memory is 16.1 GB. [2021-10-28 09:20:36,521 INFO L168 Benchmark]: TraceAbstraction took 42779.53 ms. Allocated memory was 96.5 MB in the beginning and 616.6 MB in the end (delta: 520.1 MB). Free memory was 71.0 MB in the beginning and 326.7 MB in the end (delta: -255.7 MB). Peak memory consumption was 360.8 MB. Max. memory is 16.1 GB. [2021-10-28 09:20:36,521 INFO L168 Benchmark]: Witness Printer took 52.11 ms. Allocated memory is still 616.6 MB. Free memory was 326.7 MB in the beginning and 324.3 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 09:20:36,523 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 77.6 MB. Free memory is still 50.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 613.98 ms. Allocated memory was 77.6 MB in the beginning and 96.5 MB in the end (delta: 18.9 MB). Free memory was 52.0 MB in the beginning and 61.0 MB in the end (delta: -9.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 49.00 ms. Allocated memory is still 96.5 MB. Free memory was 61.0 MB in the beginning and 59.1 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 35.21 ms. Allocated memory is still 96.5 MB. Free memory was 59.1 MB in the beginning and 57.7 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 532.20 ms. Allocated memory is still 96.5 MB. Free memory was 57.7 MB in the beginning and 71.3 MB in the end (delta: -13.6 MB). Peak memory consumption was 12.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 42779.53 ms. Allocated memory was 96.5 MB in the beginning and 616.6 MB in the end (delta: 520.1 MB). Free memory was 71.0 MB in the beginning and 326.7 MB in the end (delta: -255.7 MB). Peak memory consumption was 360.8 MB. Max. memory is 16.1 GB. * Witness Printer took 52.11 ms. Allocated memory is still 616.6 MB. Free memory was 326.7 MB in the beginning and 324.3 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 722]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 84 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 42.6s, OverallIterations: 29, TraceHistogramMax: 6, PathProgramHistogramMax: 19, EmptinessCheckTime: 0.0s, AutomataDifference: 17.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 141 SDtfs, 705 SDslu, 298 SDs, 0 SdLazy, 2618 SolverSat, 855 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1953 GetRequests, 1375 SyntacticMatches, 0 SemanticMatches, 578 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2759 ImplicationChecksByTransitivity, 5.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=4657occurred in iteration=27, InterpolantAutomatonStates: 509, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 10.4s InterpolantComputationTime, 2970 NumberOfCodeBlocks, 2970 NumberOfCodeBlocksAsserted, 87 NumberOfCheckSat, 2918 ConstructedInterpolants, 0 QuantifiedInterpolants, 9798 SizeOfPredicates, 154 NumberOfNonLiveVariables, 3442 ConjunctsInSsa, 263 ConjunctsInUnsatCore, 52 InterpolantComputations, 8 PerfectInterpolantSequences, 360/1194 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-10-28 09:20:36,568 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30e43e6a-0a58-4d73-beb2-0deb94959632/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...