./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/triangular-longest-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f8e1c903 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/triangular-longest-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 81809963fcaff21fd6241cde97e522447f695a8b323a0a16c5a31b7f82b0f683 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-f8e1c90 [2021-11-09 09:35:53,559 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-09 09:35:53,563 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-09 09:35:53,620 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-09 09:35:53,621 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-09 09:35:53,626 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-09 09:35:53,628 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-09 09:35:53,632 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-09 09:35:53,635 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-09 09:35:53,641 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-09 09:35:53,642 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-09 09:35:53,645 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-09 09:35:53,645 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-09 09:35:53,648 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-09 09:35:53,650 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-09 09:35:53,655 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-09 09:35:53,657 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-09 09:35:53,659 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-09 09:35:53,661 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-09 09:35:53,670 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-09 09:35:53,672 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-09 09:35:53,674 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-09 09:35:53,677 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-09 09:35:53,679 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-09 09:35:53,688 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-09 09:35:53,689 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-09 09:35:53,689 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-09 09:35:53,692 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-09 09:35:53,693 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-09 09:35:53,695 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-09 09:35:53,696 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-09 09:35:53,697 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-09 09:35:53,699 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-09 09:35:53,701 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-09 09:35:53,703 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-09 09:35:53,704 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-09 09:35:53,705 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-09 09:35:53,706 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-09 09:35:53,706 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-09 09:35:53,707 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-09 09:35:53,709 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-09 09:35:53,710 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-09 09:35:53,759 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-09 09:35:53,760 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-09 09:35:53,760 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-09 09:35:53,761 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-09 09:35:53,763 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-09 09:35:53,763 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-09 09:35:53,763 INFO L138 SettingsManager]: * Use SBE=true [2021-11-09 09:35:53,764 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-09 09:35:53,764 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-09 09:35:53,765 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-09 09:35:53,766 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-09 09:35:53,766 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-09 09:35:53,767 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-09 09:35:53,767 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-09 09:35:53,767 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-09 09:35:53,768 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-09 09:35:53,768 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-09 09:35:53,768 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-09 09:35:53,769 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-09 09:35:53,769 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-09 09:35:53,769 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-09 09:35:53,770 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-09 09:35:53,770 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 09:35:53,770 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-09 09:35:53,771 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-09 09:35:53,771 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-09 09:35:53,771 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-09 09:35:53,772 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-09 09:35:53,772 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-09 09:35:53,774 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-09 09:35:53,775 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-09 09:35:53,775 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-09 09:35:53,776 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_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 81809963fcaff21fd6241cde97e522447f695a8b323a0a16c5a31b7f82b0f683 [2021-11-09 09:35:54,105 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-09 09:35:54,148 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-09 09:35:54,151 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-09 09:35:54,152 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-09 09:35:54,153 INFO L275 PluginConnector]: CDTParser initialized [2021-11-09 09:35:54,154 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/../../sv-benchmarks/c/pthread/triangular-longest-1.i [2021-11-09 09:35:54,224 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/data/7fe58d934/78a2862cfde449fd89c76fbe844f013e/FLAG002f45823 [2021-11-09 09:35:54,820 INFO L306 CDTParser]: Found 1 translation units. [2021-11-09 09:35:54,820 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/sv-benchmarks/c/pthread/triangular-longest-1.i [2021-11-09 09:35:54,836 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/data/7fe58d934/78a2862cfde449fd89c76fbe844f013e/FLAG002f45823 [2021-11-09 09:35:55,091 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/data/7fe58d934/78a2862cfde449fd89c76fbe844f013e [2021-11-09 09:35:55,094 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-09 09:35:55,096 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-09 09:35:55,098 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-09 09:35:55,098 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-09 09:35:55,102 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-09 09:35:55,103 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 09:35:55" (1/1) ... [2021-11-09 09:35:55,104 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@756f2782 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:35:55, skipping insertion in model container [2021-11-09 09:35:55,105 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 09:35:55" (1/1) ... [2021-11-09 09:35:55,114 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-09 09:35:55,166 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-09 09:35:55,597 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_0620e8c9-4cd8-4646-8068-15936e8592a1/sv-benchmarks/c/pthread/triangular-longest-1.i[30962,30975] [2021-11-09 09:35:55,602 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 09:35:55,612 INFO L203 MainTranslator]: Completed pre-run [2021-11-09 09:35:55,678 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_0620e8c9-4cd8-4646-8068-15936e8592a1/sv-benchmarks/c/pthread/triangular-longest-1.i[30962,30975] [2021-11-09 09:35:55,685 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 09:35:55,744 INFO L208 MainTranslator]: Completed translation [2021-11-09 09:35:55,746 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:35:55 WrapperNode [2021-11-09 09:35:55,746 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-09 09:35:55,747 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-09 09:35:55,747 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-09 09:35:55,748 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-09 09:35:55,756 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:35:55" (1/1) ... [2021-11-09 09:35:55,787 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:35:55" (1/1) ... [2021-11-09 09:35:55,816 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-09 09:35:55,817 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-09 09:35:55,817 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-09 09:35:55,817 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-09 09:35:55,827 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:35:55" (1/1) ... [2021-11-09 09:35:55,827 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:35:55" (1/1) ... [2021-11-09 09:35:55,841 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:35:55" (1/1) ... [2021-11-09 09:35:55,841 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:35:55" (1/1) ... [2021-11-09 09:35:55,847 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:35:55" (1/1) ... [2021-11-09 09:35:55,851 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:35:55" (1/1) ... [2021-11-09 09:35:55,853 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:35:55" (1/1) ... [2021-11-09 09:35:55,856 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-09 09:35:55,857 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-09 09:35:55,858 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-09 09:35:55,858 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-09 09:35:55,861 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:35:55" (1/1) ... [2021-11-09 09:35:55,871 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 09:35:55,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:35:55,897 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-09 09:35:55,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-09 09:35:55,941 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2021-11-09 09:35:55,941 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2021-11-09 09:35:55,941 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2021-11-09 09:35:55,942 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2021-11-09 09:35:55,942 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-09 09:35:55,942 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-11-09 09:35:55,942 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-09 09:35:55,942 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-09 09:35:55,943 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-09 09:35:55,943 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-11-09 09:35:55,943 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-09 09:35:55,943 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-09 09:35:55,945 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-11-09 09:35:56,320 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-09 09:35:56,320 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-11-09 09:35:56,323 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 09:35:56 BoogieIcfgContainer [2021-11-09 09:35:56,323 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-09 09:35:56,325 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-09 09:35:56,325 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-09 09:35:56,329 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-09 09:35:56,329 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 09:35:55" (1/3) ... [2021-11-09 09:35:56,330 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66b55876 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 09:35:56, skipping insertion in model container [2021-11-09 09:35:56,331 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:35:55" (2/3) ... [2021-11-09 09:35:56,331 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66b55876 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 09:35:56, skipping insertion in model container [2021-11-09 09:35:56,331 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 09:35:56" (3/3) ... [2021-11-09 09:35:56,333 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-longest-1.i [2021-11-09 09:35:56,339 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-11-09 09:35:56,339 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-09 09:35:56,339 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-09 09:35:56,340 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-11-09 09:35:56,393 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:35:56,394 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:35:56,394 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:35:56,394 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:35:56,395 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:35:56,395 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:35:56,395 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:35:56,395 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:35:56,396 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:35:56,396 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:35:56,396 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:35:56,397 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:35:56,397 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:35:56,397 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:35:56,397 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:35:56,398 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:35:56,398 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:35:56,398 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:35:56,399 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:35:56,399 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:35:56,399 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:35:56,399 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:35:56,400 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:35:56,400 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:35:56,400 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:35:56,400 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:35:56,401 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:35:56,401 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:35:56,401 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:35:56,402 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:35:56,408 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:35:56,409 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:35:56,409 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:35:56,409 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:35:56,409 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:35:56,410 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:35:56,410 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:35:56,410 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:35:56,410 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:35:56,411 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:35:56,411 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:35:56,411 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:35:56,411 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:35:56,412 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:35:56,412 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:35:56,412 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:35:56,412 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:35:56,413 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:35:56,413 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:35:56,413 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:35:56,413 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:35:56,413 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:35:56,414 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:35:56,414 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:35:56,414 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:35:56,414 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:35:56,418 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:35:56,427 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:35:56,427 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:35:56,427 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:35:56,428 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:35:56,428 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:35:56,440 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:35:56,440 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:35:56,440 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:35:56,441 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:35:56,441 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:35:56,441 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:35:56,455 INFO L148 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-11-09 09:35:56,501 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-09 09:35:56,508 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-09 09:35:56,509 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-11-09 09:35:56,522 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 68 places, 66 transitions, 142 flow [2021-11-09 09:35:56,568 INFO L129 PetriNetUnfolder]: 5/64 cut-off events. [2021-11-09 09:35:56,569 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-11-09 09:35:56,573 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. [2021-11-09 09:35:56,573 INFO L82 GeneralOperation]: Start removeDead. Operand has 68 places, 66 transitions, 142 flow [2021-11-09 09:35:56,578 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 66 places, 64 transitions, 134 flow [2021-11-09 09:35:56,602 INFO L129 PetriNetUnfolder]: 3/52 cut-off events. [2021-11-09 09:35:56,607 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-11-09 09:35:56,607 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:35:56,608 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] [2021-11-09 09:35:56,609 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:35:56,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:35:56,619 INFO L85 PathProgramCache]: Analyzing trace with hash 2112281486, now seen corresponding path program 1 times [2021-11-09 09:35:56,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:35:56,630 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521707270] [2021-11-09 09:35:56,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:35:56,634 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:35:56,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:57,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:35:57,227 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:35:57,228 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521707270] [2021-11-09 09:35:57,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521707270] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:35:57,231 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:35:57,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-09 09:35:57,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127049565] [2021-11-09 09:35:57,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 09:35:57,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:35:57,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 09:35:57,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-09 09:35:57,275 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-09 09:35:57,281 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) [2021-11-09 09:35:57,282 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:35:57,282 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-09 09:35:57,283 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:35:57,507 INFO L129 PetriNetUnfolder]: 39/220 cut-off events. [2021-11-09 09:35:57,507 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-11-09 09:35:57,510 INFO L84 FinitePrefix]: Finished finitePrefix Result has 294 conditions, 220 events. 39/220 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 984 event pairs, 0 based on Foata normal form. 40/235 useless extension candidates. Maximal degree in co-relation 265. Up to 26 conditions per place. [2021-11-09 09:35:57,513 INFO L132 encePairwiseOnDemand]: 55/66 looper letters, 16 selfloop transitions, 9 changer transitions 5/81 dead transitions. [2021-11-09 09:35:57,513 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 81 transitions, 228 flow [2021-11-09 09:35:57,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-09 09:35:57,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-11-09 09:35:57,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 473 transitions. [2021-11-09 09:35:57,537 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8958333333333334 [2021-11-09 09:35:57,537 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 473 transitions. [2021-11-09 09:35:57,538 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 473 transitions. [2021-11-09 09:35:57,540 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:35:57,543 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 473 transitions. [2021-11-09 09:35:57,548 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 59.125) internal successors, (473), 8 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:35:57,556 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 66.0) internal successors, (594), 9 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:35:57,556 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 66.0) internal successors, (594), 9 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:35:57,558 INFO L186 Difference]: Start difference. First operand has 66 places, 64 transitions, 134 flow. Second operand 8 states and 473 transitions. [2021-11-09 09:35:57,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 81 transitions, 228 flow [2021-11-09 09:35:57,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 81 transitions, 226 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-11-09 09:35:57,566 INFO L242 Difference]: Finished difference. Result has 77 places, 67 transitions, 198 flow [2021-11-09 09:35:57,568 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=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=198, PETRI_PLACES=77, PETRI_TRANSITIONS=67} [2021-11-09 09:35:57,569 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 11 predicate places. [2021-11-09 09:35:57,569 INFO L470 AbstractCegarLoop]: Abstraction has has 77 places, 67 transitions, 198 flow [2021-11-09 09:35:57,570 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) [2021-11-09 09:35:57,570 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:35:57,570 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] [2021-11-09 09:35:57,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-09 09:35:57,571 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:35:57,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:35:57,571 INFO L85 PathProgramCache]: Analyzing trace with hash 263941995, now seen corresponding path program 1 times [2021-11-09 09:35:57,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:35:57,572 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386066259] [2021-11-09 09:35:57,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:35:57,572 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:35:57,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:57,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:35:57,743 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:35:57,743 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386066259] [2021-11-09 09:35:57,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386066259] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:35:57,744 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:35:57,744 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-09 09:35:57,744 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242746969] [2021-11-09 09:35:57,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 09:35:57,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:35:57,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 09:35:57,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-09 09:35:57,747 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-09 09:35:57,748 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 67 transitions, 198 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) [2021-11-09 09:35:57,748 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:35:57,748 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-09 09:35:57,749 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:35:57,900 INFO L129 PetriNetUnfolder]: 55/271 cut-off events. [2021-11-09 09:35:57,901 INFO L130 PetriNetUnfolder]: For 298/325 co-relation queries the response was YES. [2021-11-09 09:35:57,903 INFO L84 FinitePrefix]: Finished finitePrefix Result has 578 conditions, 271 events. 55/271 cut-off events. For 298/325 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1215 event pairs, 0 based on Foata normal form. 9/259 useless extension candidates. Maximal degree in co-relation 540. Up to 42 conditions per place. [2021-11-09 09:35:57,905 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 19 selfloop transitions, 11 changer transitions 30/104 dead transitions. [2021-11-09 09:35:57,906 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 104 transitions, 540 flow [2021-11-09 09:35:57,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-09 09:35:57,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-11-09 09:35:57,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 568 transitions. [2021-11-09 09:35:57,908 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8606060606060606 [2021-11-09 09:35:57,909 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 568 transitions. [2021-11-09 09:35:57,909 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 568 transitions. [2021-11-09 09:35:57,909 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:35:57,909 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 568 transitions. [2021-11-09 09:35:57,912 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 56.8) internal successors, (568), 10 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:35:57,914 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) [2021-11-09 09:35:57,915 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) [2021-11-09 09:35:57,915 INFO L186 Difference]: Start difference. First operand has 77 places, 67 transitions, 198 flow. Second operand 10 states and 568 transitions. [2021-11-09 09:35:57,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 104 transitions, 540 flow [2021-11-09 09:35:57,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 104 transitions, 526 flow, removed 4 selfloop flow, removed 2 redundant places. [2021-11-09 09:35:57,922 INFO L242 Difference]: Finished difference. Result has 91 places, 66 transitions, 285 flow [2021-11-09 09:35:57,923 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=285, PETRI_PLACES=91, PETRI_TRANSITIONS=66} [2021-11-09 09:35:57,923 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 25 predicate places. [2021-11-09 09:35:57,924 INFO L470 AbstractCegarLoop]: Abstraction has has 91 places, 66 transitions, 285 flow [2021-11-09 09:35:57,924 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) [2021-11-09 09:35:57,924 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:35:57,925 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] [2021-11-09 09:35:57,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-09 09:35:57,925 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:35:57,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:35:57,926 INFO L85 PathProgramCache]: Analyzing trace with hash 2041180881, now seen corresponding path program 2 times [2021-11-09 09:35:57,926 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:35:57,926 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633402982] [2021-11-09 09:35:57,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:35:57,927 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:35:57,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:58,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:35:58,046 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:35:58,046 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633402982] [2021-11-09 09:35:58,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633402982] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:35:58,048 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:35:58,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-09 09:35:58,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712888786] [2021-11-09 09:35:58,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 09:35:58,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:35:58,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 09:35:58,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-09 09:35:58,053 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-09 09:35:58,054 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 66 transitions, 285 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) [2021-11-09 09:35:58,054 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:35:58,054 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-09 09:35:58,054 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:35:58,191 INFO L129 PetriNetUnfolder]: 35/183 cut-off events. [2021-11-09 09:35:58,191 INFO L130 PetriNetUnfolder]: For 839/896 co-relation queries the response was YES. [2021-11-09 09:35:58,194 INFO L84 FinitePrefix]: Finished finitePrefix Result has 527 conditions, 183 events. 35/183 cut-off events. For 839/896 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 610 event pairs, 0 based on Foata normal form. 27/193 useless extension candidates. Maximal degree in co-relation 481. Up to 35 conditions per place. [2021-11-09 09:35:58,196 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 16 selfloop transitions, 12 changer transitions 11/83 dead transitions. [2021-11-09 09:35:58,196 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 83 transitions, 565 flow [2021-11-09 09:35:58,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-09 09:35:58,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-11-09 09:35:58,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 503 transitions. [2021-11-09 09:35:58,204 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8468013468013468 [2021-11-09 09:35:58,204 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 503 transitions. [2021-11-09 09:35:58,204 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 503 transitions. [2021-11-09 09:35:58,205 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:35:58,205 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 503 transitions. [2021-11-09 09:35:58,207 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) [2021-11-09 09:35:58,210 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) [2021-11-09 09:35:58,210 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) [2021-11-09 09:35:58,211 INFO L186 Difference]: Start difference. First operand has 91 places, 66 transitions, 285 flow. Second operand 9 states and 503 transitions. [2021-11-09 09:35:58,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 83 transitions, 565 flow [2021-11-09 09:35:58,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 83 transitions, 492 flow, removed 33 selfloop flow, removed 5 redundant places. [2021-11-09 09:35:58,225 INFO L242 Difference]: Finished difference. Result has 85 places, 68 transitions, 325 flow [2021-11-09 09:35:58,226 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=254, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=325, PETRI_PLACES=85, PETRI_TRANSITIONS=68} [2021-11-09 09:35:58,226 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 19 predicate places. [2021-11-09 09:35:58,226 INFO L470 AbstractCegarLoop]: Abstraction has has 85 places, 68 transitions, 325 flow [2021-11-09 09:35:58,227 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) [2021-11-09 09:35:58,227 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:35:58,227 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] [2021-11-09 09:35:58,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-09 09:35:58,228 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:35:58,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:35:58,228 INFO L85 PathProgramCache]: Analyzing trace with hash 418425126, now seen corresponding path program 1 times [2021-11-09 09:35:58,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:35:58,229 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131053824] [2021-11-09 09:35:58,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:35:58,229 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:35:58,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:58,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:35:58,391 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:35:58,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131053824] [2021-11-09 09:35:58,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131053824] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:35:58,391 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:35:58,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-09 09:35:58,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114431609] [2021-11-09 09:35:58,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 09:35:58,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:35:58,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 09:35:58,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-09 09:35:58,400 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-09 09:35:58,401 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 68 transitions, 325 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) [2021-11-09 09:35:58,402 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:35:58,402 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-09 09:35:58,402 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:35:58,559 INFO L129 PetriNetUnfolder]: 41/221 cut-off events. [2021-11-09 09:35:58,559 INFO L130 PetriNetUnfolder]: For 911/960 co-relation queries the response was YES. [2021-11-09 09:35:58,561 INFO L84 FinitePrefix]: Finished finitePrefix Result has 634 conditions, 221 events. 41/221 cut-off events. For 911/960 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 777 event pairs, 0 based on Foata normal form. 18/218 useless extension candidates. Maximal degree in co-relation 585. Up to 41 conditions per place. [2021-11-09 09:35:58,565 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 18 selfloop transitions, 20 changer transitions 8/90 dead transitions. [2021-11-09 09:35:58,565 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 90 transitions, 675 flow [2021-11-09 09:35:58,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-09 09:35:58,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-11-09 09:35:58,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 620 transitions. [2021-11-09 09:35:58,569 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8539944903581267 [2021-11-09 09:35:58,569 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 620 transitions. [2021-11-09 09:35:58,570 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 620 transitions. [2021-11-09 09:35:58,571 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:35:58,571 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 620 transitions. [2021-11-09 09:35:58,574 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) [2021-11-09 09:35:58,576 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) [2021-11-09 09:35:58,577 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) [2021-11-09 09:35:58,577 INFO L186 Difference]: Start difference. First operand has 85 places, 68 transitions, 325 flow. Second operand 11 states and 620 transitions. [2021-11-09 09:35:58,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 90 transitions, 675 flow [2021-11-09 09:35:58,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 90 transitions, 578 flow, removed 38 selfloop flow, removed 8 redundant places. [2021-11-09 09:35:58,588 INFO L242 Difference]: Finished difference. Result has 91 places, 73 transitions, 410 flow [2021-11-09 09:35:58,588 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=286, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=410, PETRI_PLACES=91, PETRI_TRANSITIONS=73} [2021-11-09 09:35:58,589 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 25 predicate places. [2021-11-09 09:35:58,589 INFO L470 AbstractCegarLoop]: Abstraction has has 91 places, 73 transitions, 410 flow [2021-11-09 09:35:58,589 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) [2021-11-09 09:35:58,590 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:35:58,590 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] [2021-11-09 09:35:58,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-09 09:35:58,590 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:35:58,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:35:58,591 INFO L85 PathProgramCache]: Analyzing trace with hash 1863597102, now seen corresponding path program 2 times [2021-11-09 09:35:58,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:35:58,592 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54449215] [2021-11-09 09:35:58,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:35:58,593 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:35:58,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:58,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:35:58,741 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:35:58,742 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54449215] [2021-11-09 09:35:58,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54449215] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:35:58,743 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:35:58,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-09 09:35:58,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496821572] [2021-11-09 09:35:58,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 09:35:58,744 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:35:58,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 09:35:58,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-09 09:35:58,747 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-09 09:35:58,748 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 73 transitions, 410 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) [2021-11-09 09:35:58,748 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:35:58,748 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-09 09:35:58,749 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:35:58,923 INFO L129 PetriNetUnfolder]: 34/203 cut-off events. [2021-11-09 09:35:58,924 INFO L130 PetriNetUnfolder]: For 964/1012 co-relation queries the response was YES. [2021-11-09 09:35:58,925 INFO L84 FinitePrefix]: Finished finitePrefix Result has 597 conditions, 203 events. 34/203 cut-off events. For 964/1012 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 702 event pairs, 0 based on Foata normal form. 26/210 useless extension candidates. Maximal degree in co-relation 552. Up to 38 conditions per place. [2021-11-09 09:35:58,928 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 15 selfloop transitions, 20 changer transitions 11/90 dead transitions. [2021-11-09 09:35:58,928 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 90 transitions, 734 flow [2021-11-09 09:35:58,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-09 09:35:58,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-11-09 09:35:58,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 614 transitions. [2021-11-09 09:35:58,931 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8457300275482094 [2021-11-09 09:35:58,932 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 614 transitions. [2021-11-09 09:35:58,932 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 614 transitions. [2021-11-09 09:35:58,932 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:35:58,933 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 614 transitions. [2021-11-09 09:35:58,935 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 55.81818181818182) internal successors, (614), 11 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:35:58,937 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) [2021-11-09 09:35:58,938 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) [2021-11-09 09:35:58,938 INFO L186 Difference]: Start difference. First operand has 91 places, 73 transitions, 410 flow. Second operand 11 states and 614 transitions. [2021-11-09 09:35:58,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 90 transitions, 734 flow [2021-11-09 09:35:58,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 90 transitions, 662 flow, removed 20 selfloop flow, removed 7 redundant places. [2021-11-09 09:35:58,949 INFO L242 Difference]: Finished difference. Result has 96 places, 74 transitions, 451 flow [2021-11-09 09:35:58,949 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=364, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=451, PETRI_PLACES=96, PETRI_TRANSITIONS=74} [2021-11-09 09:35:58,950 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 30 predicate places. [2021-11-09 09:35:58,950 INFO L470 AbstractCegarLoop]: Abstraction has has 96 places, 74 transitions, 451 flow [2021-11-09 09:35:58,950 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) [2021-11-09 09:35:58,950 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:35:58,951 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] [2021-11-09 09:35:58,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-09 09:35:58,951 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:35:58,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:35:58,952 INFO L85 PathProgramCache]: Analyzing trace with hash -1954121900, now seen corresponding path program 3 times [2021-11-09 09:35:58,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:35:58,952 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448724023] [2021-11-09 09:35:58,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:35:58,953 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:35:58,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:59,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:35:59,105 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:35:59,105 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448724023] [2021-11-09 09:35:59,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448724023] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:35:59,105 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:35:59,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-09 09:35:59,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938278415] [2021-11-09 09:35:59,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 09:35:59,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:35:59,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 09:35:59,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-09 09:35:59,109 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-09 09:35:59,109 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 74 transitions, 451 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) [2021-11-09 09:35:59,110 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:35:59,110 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-09 09:35:59,110 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:35:59,329 INFO L129 PetriNetUnfolder]: 33/187 cut-off events. [2021-11-09 09:35:59,329 INFO L130 PetriNetUnfolder]: For 969/1007 co-relation queries the response was YES. [2021-11-09 09:35:59,330 INFO L84 FinitePrefix]: Finished finitePrefix Result has 593 conditions, 187 events. 33/187 cut-off events. For 969/1007 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 672 event pairs, 0 based on Foata normal form. 27/198 useless extension candidates. Maximal degree in co-relation 545. Up to 38 conditions per place. [2021-11-09 09:35:59,332 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 22 selfloop transitions, 17 changer transitions 5/88 dead transitions. [2021-11-09 09:35:59,333 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 88 transitions, 742 flow [2021-11-09 09:35:59,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-09 09:35:59,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-11-09 09:35:59,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 668 transitions. [2021-11-09 09:35:59,336 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8434343434343434 [2021-11-09 09:35:59,336 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 668 transitions. [2021-11-09 09:35:59,337 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 668 transitions. [2021-11-09 09:35:59,337 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:35:59,338 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 668 transitions. [2021-11-09 09:35:59,340 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 55.666666666666664) internal successors, (668), 12 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:35:59,342 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) [2021-11-09 09:35:59,343 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) [2021-11-09 09:35:59,343 INFO L186 Difference]: Start difference. First operand has 96 places, 74 transitions, 451 flow. Second operand 12 states and 668 transitions. [2021-11-09 09:35:59,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 88 transitions, 742 flow [2021-11-09 09:35:59,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 88 transitions, 641 flow, removed 29 selfloop flow, removed 10 redundant places. [2021-11-09 09:35:59,352 INFO L242 Difference]: Finished difference. Result has 99 places, 78 transitions, 490 flow [2021-11-09 09:35:59,353 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=380, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=490, PETRI_PLACES=99, PETRI_TRANSITIONS=78} [2021-11-09 09:35:59,353 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 33 predicate places. [2021-11-09 09:35:59,353 INFO L470 AbstractCegarLoop]: Abstraction has has 99 places, 78 transitions, 490 flow [2021-11-09 09:35:59,354 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) [2021-11-09 09:35:59,354 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:35:59,354 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] [2021-11-09 09:35:59,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-09 09:35:59,354 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:35:59,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:35:59,355 INFO L85 PathProgramCache]: Analyzing trace with hash 1389345520, now seen corresponding path program 1 times [2021-11-09 09:35:59,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:35:59,356 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521371785] [2021-11-09 09:35:59,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:35:59,356 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:35:59,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:59,455 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:35:59,456 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:35:59,456 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521371785] [2021-11-09 09:35:59,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521371785] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:35:59,457 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508053621] [2021-11-09 09:35:59,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:35:59,457 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:35:59,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:35:59,460 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:35:59,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-09 09:35:59,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:59,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-09 09:35:59,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:35:59,842 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:35:59,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508053621] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:35:59,843 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:35:59,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-11-09 09:35:59,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522440412] [2021-11-09 09:35:59,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-09 09:35:59,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:35:59,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-09 09:35:59,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-11-09 09:35:59,847 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-09 09:35:59,848 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 78 transitions, 490 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) [2021-11-09 09:35:59,848 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:35:59,848 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-09 09:35:59,848 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:36:00,094 INFO L129 PetriNetUnfolder]: 44/240 cut-off events. [2021-11-09 09:36:00,094 INFO L130 PetriNetUnfolder]: For 1434/1494 co-relation queries the response was YES. [2021-11-09 09:36:00,096 INFO L84 FinitePrefix]: Finished finitePrefix Result has 785 conditions, 240 events. 44/240 cut-off events. For 1434/1494 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 920 event pairs, 0 based on Foata normal form. 32/251 useless extension candidates. Maximal degree in co-relation 736. Up to 52 conditions per place. [2021-11-09 09:36:00,099 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 17 selfloop transitions, 33 changer transitions 11/105 dead transitions. [2021-11-09 09:36:00,100 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 105 transitions, 1026 flow [2021-11-09 09:36:00,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-09 09:36:00,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-11-09 09:36:00,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 893 transitions. [2021-11-09 09:36:00,104 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8456439393939394 [2021-11-09 09:36:00,104 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 893 transitions. [2021-11-09 09:36:00,105 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 893 transitions. [2021-11-09 09:36:00,106 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:36:00,106 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 893 transitions. [2021-11-09 09:36:00,109 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 55.8125) internal successors, (893), 16 states have internal predecessors, (893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:36:00,112 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) [2021-11-09 09:36:00,113 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) [2021-11-09 09:36:00,114 INFO L186 Difference]: Start difference. First operand has 99 places, 78 transitions, 490 flow. Second operand 16 states and 893 transitions. [2021-11-09 09:36:00,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 105 transitions, 1026 flow [2021-11-09 09:36:00,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 105 transitions, 956 flow, removed 28 selfloop flow, removed 5 redundant places. [2021-11-09 09:36:00,125 INFO L242 Difference]: Finished difference. Result has 115 places, 89 transitions, 744 flow [2021-11-09 09:36:00,126 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=442, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=744, PETRI_PLACES=115, PETRI_TRANSITIONS=89} [2021-11-09 09:36:00,126 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 49 predicate places. [2021-11-09 09:36:00,126 INFO L470 AbstractCegarLoop]: Abstraction has has 115 places, 89 transitions, 744 flow [2021-11-09 09:36:00,127 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) [2021-11-09 09:36:00,127 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:36:00,127 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] [2021-11-09 09:36:00,175 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-09 09:36:00,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:36:00,351 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:36:00,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:36:00,352 INFO L85 PathProgramCache]: Analyzing trace with hash -178007383, now seen corresponding path program 1 times [2021-11-09 09:36:00,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:36:00,352 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419775742] [2021-11-09 09:36:00,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:36:00,353 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:36:00,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:00,485 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:36:00,486 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:36:00,486 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419775742] [2021-11-09 09:36:00,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419775742] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:36:00,486 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465183386] [2021-11-09 09:36:00,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:36:00,487 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:36:00,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:36:00,488 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:36:00,513 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-09 09:36:00,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:00,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-09 09:36:00,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:36:00,880 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:36:00,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465183386] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:36:00,880 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:36:00,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-11-09 09:36:00,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922996490] [2021-11-09 09:36:00,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-09 09:36:00,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:36:00,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-09 09:36:00,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-09 09:36:00,886 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-09 09:36:00,887 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 89 transitions, 744 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) [2021-11-09 09:36:00,887 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:36:00,887 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-09 09:36:00,888 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:36:01,143 INFO L129 PetriNetUnfolder]: 52/289 cut-off events. [2021-11-09 09:36:01,143 INFO L130 PetriNetUnfolder]: For 2263/2326 co-relation queries the response was YES. [2021-11-09 09:36:01,146 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1057 conditions, 289 events. 52/289 cut-off events. For 2263/2326 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1213 event pairs, 0 based on Foata normal form. 42/304 useless extension candidates. Maximal degree in co-relation 997. Up to 64 conditions per place. [2021-11-09 09:36:01,150 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 35 selfloop transitions, 30 changer transitions 8/117 dead transitions. [2021-11-09 09:36:01,151 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 117 transitions, 1406 flow [2021-11-09 09:36:01,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-09 09:36:01,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-11-09 09:36:01,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 892 transitions. [2021-11-09 09:36:01,155 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8446969696969697 [2021-11-09 09:36:01,156 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 892 transitions. [2021-11-09 09:36:01,156 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 892 transitions. [2021-11-09 09:36:01,157 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:36:01,157 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 892 transitions. [2021-11-09 09:36:01,160 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) [2021-11-09 09:36:01,163 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) [2021-11-09 09:36:01,164 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) [2021-11-09 09:36:01,165 INFO L186 Difference]: Start difference. First operand has 115 places, 89 transitions, 744 flow. Second operand 16 states and 892 transitions. [2021-11-09 09:36:01,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 117 transitions, 1406 flow [2021-11-09 09:36:01,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 117 transitions, 1033 flow, removed 171 selfloop flow, removed 10 redundant places. [2021-11-09 09:36:01,184 INFO L242 Difference]: Finished difference. Result has 123 places, 99 transitions, 767 flow [2021-11-09 09:36:01,185 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=551, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=767, PETRI_PLACES=123, PETRI_TRANSITIONS=99} [2021-11-09 09:36:01,185 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 57 predicate places. [2021-11-09 09:36:01,185 INFO L470 AbstractCegarLoop]: Abstraction has has 123 places, 99 transitions, 767 flow [2021-11-09 09:36:01,186 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) [2021-11-09 09:36:01,186 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:36:01,186 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] [2021-11-09 09:36:01,222 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-09 09:36:01,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-09 09:36:01,411 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:36:01,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:36:01,412 INFO L85 PathProgramCache]: Analyzing trace with hash 800770181, now seen corresponding path program 2 times [2021-11-09 09:36:01,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:36:01,412 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545472206] [2021-11-09 09:36:01,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:36:01,412 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:36:01,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:01,542 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:36:01,542 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:36:01,542 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545472206] [2021-11-09 09:36:01,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545472206] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:36:01,543 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859843668] [2021-11-09 09:36:01,543 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:36:01,543 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:36:01,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:36:01,547 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:36:01,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-09 09:36:01,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:36:01,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:36:01,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-09 09:36:01,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:36:01,960 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:36:01,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859843668] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:36:01,960 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:36:01,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-11-09 09:36:01,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069765746] [2021-11-09 09:36:01,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-09 09:36:01,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:36:01,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-09 09:36:01,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-09 09:36:01,967 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-09 09:36:01,968 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 99 transitions, 767 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) [2021-11-09 09:36:01,968 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:36:01,968 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-09 09:36:01,968 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:36:02,309 INFO L129 PetriNetUnfolder]: 66/361 cut-off events. [2021-11-09 09:36:02,309 INFO L130 PetriNetUnfolder]: For 2941/3011 co-relation queries the response was YES. [2021-11-09 09:36:02,312 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1298 conditions, 361 events. 66/361 cut-off events. For 2941/3011 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1607 event pairs, 0 based on Foata normal form. 39/367 useless extension candidates. Maximal degree in co-relation 1236. Up to 72 conditions per place. [2021-11-09 09:36:02,317 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 23 selfloop transitions, 53 changer transitions 14/134 dead transitions. [2021-11-09 09:36:02,317 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 134 transitions, 1651 flow [2021-11-09 09:36:02,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-09 09:36:02,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-11-09 09:36:02,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1172 transitions. [2021-11-09 09:36:02,323 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8455988455988456 [2021-11-09 09:36:02,323 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1172 transitions. [2021-11-09 09:36:02,323 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1172 transitions. [2021-11-09 09:36:02,324 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:36:02,324 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1172 transitions. [2021-11-09 09:36:02,329 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 55.80952380952381) internal successors, (1172), 21 states have internal predecessors, (1172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:36:02,333 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) [2021-11-09 09:36:02,334 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) [2021-11-09 09:36:02,334 INFO L186 Difference]: Start difference. First operand has 123 places, 99 transitions, 767 flow. Second operand 21 states and 1172 transitions. [2021-11-09 09:36:02,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 134 transitions, 1651 flow [2021-11-09 09:36:02,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 134 transitions, 1520 flow, removed 51 selfloop flow, removed 11 redundant places. [2021-11-09 09:36:02,353 INFO L242 Difference]: Finished difference. Result has 140 places, 113 transitions, 1120 flow [2021-11-09 09:36:02,354 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=692, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1120, PETRI_PLACES=140, PETRI_TRANSITIONS=113} [2021-11-09 09:36:02,354 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 74 predicate places. [2021-11-09 09:36:02,354 INFO L470 AbstractCegarLoop]: Abstraction has has 140 places, 113 transitions, 1120 flow [2021-11-09 09:36:02,355 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) [2021-11-09 09:36:02,355 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:36:02,355 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] [2021-11-09 09:36:02,393 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-09 09:36:02,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:36:02,569 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:36:02,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:36:02,570 INFO L85 PathProgramCache]: Analyzing trace with hash -2120315628, now seen corresponding path program 3 times [2021-11-09 09:36:02,570 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:36:02,570 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607363846] [2021-11-09 09:36:02,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:36:02,570 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:36:02,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:02,693 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:36:02,693 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:36:02,694 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607363846] [2021-11-09 09:36:02,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607363846] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:36:02,694 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773861053] [2021-11-09 09:36:02,694 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:36:02,694 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:36:02,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:36:02,696 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:36:02,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-09 09:36:02,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-09 09:36:02,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:36:02,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-09 09:36:02,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:36:03,135 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:36:03,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773861053] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:36:03,136 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:36:03,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-11-09 09:36:03,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650036242] [2021-11-09 09:36:03,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-09 09:36:03,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:36:03,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-09 09:36:03,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-09 09:36:03,140 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-09 09:36:03,141 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 113 transitions, 1120 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) [2021-11-09 09:36:03,142 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:36:03,142 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-09 09:36:03,142 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:36:03,597 INFO L129 PetriNetUnfolder]: 80/448 cut-off events. [2021-11-09 09:36:03,598 INFO L130 PetriNetUnfolder]: For 5936/6007 co-relation queries the response was YES. [2021-11-09 09:36:03,601 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1862 conditions, 448 events. 80/448 cut-off events. For 5936/6007 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 2088 event pairs, 0 based on Foata normal form. 44/449 useless extension candidates. Maximal degree in co-relation 1792. Up to 92 conditions per place. [2021-11-09 09:36:03,607 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 41 selfloop transitions, 61 changer transitions 14/160 dead transitions. [2021-11-09 09:36:03,607 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 160 transitions, 2444 flow [2021-11-09 09:36:03,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-09 09:36:03,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-11-09 09:36:03,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1394 transitions. [2021-11-09 09:36:03,611 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8448484848484848 [2021-11-09 09:36:03,612 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1394 transitions. [2021-11-09 09:36:03,612 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1394 transitions. [2021-11-09 09:36:03,613 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:36:03,613 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1394 transitions. [2021-11-09 09:36:03,619 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 55.76) internal successors, (1394), 25 states have internal predecessors, (1394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:36:03,624 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 66.0) internal successors, (1716), 26 states have internal predecessors, (1716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:36:03,626 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 66.0) internal successors, (1716), 26 states have internal predecessors, (1716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:36:03,626 INFO L186 Difference]: Start difference. First operand has 140 places, 113 transitions, 1120 flow. Second operand 25 states and 1394 transitions. [2021-11-09 09:36:03,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 160 transitions, 2444 flow [2021-11-09 09:36:03,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 160 transitions, 1929 flow, removed 233 selfloop flow, removed 13 redundant places. [2021-11-09 09:36:03,661 INFO L242 Difference]: Finished difference. Result has 157 places, 133 transitions, 1366 flow [2021-11-09 09:36:03,662 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=859, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=1366, PETRI_PLACES=157, PETRI_TRANSITIONS=133} [2021-11-09 09:36:03,662 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 91 predicate places. [2021-11-09 09:36:03,662 INFO L470 AbstractCegarLoop]: Abstraction has has 157 places, 133 transitions, 1366 flow [2021-11-09 09:36:03,663 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) [2021-11-09 09:36:03,663 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:36:03,663 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] [2021-11-09 09:36:03,703 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-09 09:36:03,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-09 09:36:03,879 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:36:03,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:36:03,880 INFO L85 PathProgramCache]: Analyzing trace with hash 2145249968, now seen corresponding path program 4 times [2021-11-09 09:36:03,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:36:03,880 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293844532] [2021-11-09 09:36:03,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:36:03,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:36:03,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:04,011 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:36:04,012 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:36:04,012 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293844532] [2021-11-09 09:36:04,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293844532] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:36:04,012 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714770104] [2021-11-09 09:36:04,013 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 09:36:04,013 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:36:04,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:36:04,014 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:36:04,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-09 09:36:04,189 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 09:36:04,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:36:04,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-09 09:36:04,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:36:04,450 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:36:04,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714770104] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:36:04,451 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:36:04,451 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-11-09 09:36:04,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529932136] [2021-11-09 09:36:04,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-09 09:36:04,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:36:04,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-09 09:36:04,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-11-09 09:36:04,456 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-09 09:36:04,458 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 133 transitions, 1366 flow. Second operand has 14 states, 14 states have (on average 54.142857142857146) internal successors, (758), 14 states have internal predecessors, (758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:36:04,458 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:36:04,458 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-09 09:36:04,458 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:36:04,929 INFO L129 PetriNetUnfolder]: 90/507 cut-off events. [2021-11-09 09:36:04,930 INFO L130 PetriNetUnfolder]: For 8631/8695 co-relation queries the response was YES. [2021-11-09 09:36:04,934 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2163 conditions, 507 events. 90/507 cut-off events. For 8631/8695 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 2431 event pairs, 0 based on Foata normal form. 30/489 useless extension candidates. Maximal degree in co-relation 2087. Up to 90 conditions per place. [2021-11-09 09:36:04,940 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 33 selfloop transitions, 79 changer transitions 14/170 dead transitions. [2021-11-09 09:36:04,940 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 170 transitions, 2718 flow [2021-11-09 09:36:04,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-09 09:36:04,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-11-09 09:36:04,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1394 transitions. [2021-11-09 09:36:04,944 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8448484848484848 [2021-11-09 09:36:04,944 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1394 transitions. [2021-11-09 09:36:04,945 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1394 transitions. [2021-11-09 09:36:04,947 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:36:04,947 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1394 transitions. [2021-11-09 09:36:04,953 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 55.76) internal successors, (1394), 25 states have internal predecessors, (1394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:36:04,958 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 66.0) internal successors, (1716), 26 states have internal predecessors, (1716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:36:04,960 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 66.0) internal successors, (1716), 26 states have internal predecessors, (1716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:36:04,960 INFO L186 Difference]: Start difference. First operand has 157 places, 133 transitions, 1366 flow. Second operand 25 states and 1394 transitions. [2021-11-09 09:36:04,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 170 transitions, 2718 flow [2021-11-09 09:36:04,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 170 transitions, 2196 flow, removed 230 selfloop flow, removed 18 redundant places. [2021-11-09 09:36:05,001 INFO L242 Difference]: Finished difference. Result has 169 places, 147 transitions, 1594 flow [2021-11-09 09:36:05,001 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=1076, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=1594, PETRI_PLACES=169, PETRI_TRANSITIONS=147} [2021-11-09 09:36:05,002 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 103 predicate places. [2021-11-09 09:36:05,002 INFO L470 AbstractCegarLoop]: Abstraction has has 169 places, 147 transitions, 1594 flow [2021-11-09 09:36:05,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 54.142857142857146) internal successors, (758), 14 states have internal predecessors, (758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:36:05,002 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:36:05,003 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] [2021-11-09 09:36:05,039 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-09 09:36:05,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-09 09:36:05,231 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:36:05,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:36:05,232 INFO L85 PathProgramCache]: Analyzing trace with hash -470542211, now seen corresponding path program 5 times [2021-11-09 09:36:05,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:36:05,232 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188415291] [2021-11-09 09:36:05,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:36:05,232 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:36:05,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:05,358 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:36:05,358 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:36:05,359 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188415291] [2021-11-09 09:36:05,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188415291] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:36:05,359 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516694480] [2021-11-09 09:36:05,359 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 09:36:05,359 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:36:05,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:36:05,360 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:36:05,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-09 09:36:05,557 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-11-09 09:36:05,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:36:05,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-09 09:36:05,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:36:05,857 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:36:05,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516694480] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:36:05,858 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:36:05,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-11-09 09:36:05,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820103466] [2021-11-09 09:36:05,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-09 09:36:05,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:36:05,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-09 09:36:05,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-11-09 09:36:05,861 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-09 09:36:05,862 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 147 transitions, 1594 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) [2021-11-09 09:36:05,862 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:36:05,863 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-09 09:36:05,863 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:36:06,439 INFO L129 PetriNetUnfolder]: 100/566 cut-off events. [2021-11-09 09:36:06,439 INFO L130 PetriNetUnfolder]: For 9526/9592 co-relation queries the response was YES. [2021-11-09 09:36:06,446 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2425 conditions, 566 events. 100/566 cut-off events. For 9526/9592 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 2774 event pairs, 0 based on Foata normal form. 35/546 useless extension candidates. Maximal degree in co-relation 2344. Up to 98 conditions per place. [2021-11-09 09:36:06,454 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 51 selfloop transitions, 81 changer transitions 14/190 dead transitions. [2021-11-09 09:36:06,454 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 190 transitions, 3066 flow [2021-11-09 09:36:06,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-09 09:36:06,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-11-09 09:36:06,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1616 transitions. [2021-11-09 09:36:06,458 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8443051201671892 [2021-11-09 09:36:06,459 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1616 transitions. [2021-11-09 09:36:06,459 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1616 transitions. [2021-11-09 09:36:06,460 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:36:06,460 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1616 transitions. [2021-11-09 09:36:06,465 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) [2021-11-09 09:36:06,470 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) [2021-11-09 09:36:06,471 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) [2021-11-09 09:36:06,471 INFO L186 Difference]: Start difference. First operand has 169 places, 147 transitions, 1594 flow. Second operand 29 states and 1616 transitions. [2021-11-09 09:36:06,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 190 transitions, 3066 flow [2021-11-09 09:36:06,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 190 transitions, 2601 flow, removed 187 selfloop flow, removed 17 redundant places. [2021-11-09 09:36:06,517 INFO L242 Difference]: Finished difference. Result has 186 places, 163 transitions, 1818 flow [2021-11-09 09:36:06,518 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=1269, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=1818, PETRI_PLACES=186, PETRI_TRANSITIONS=163} [2021-11-09 09:36:06,518 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 120 predicate places. [2021-11-09 09:36:06,519 INFO L470 AbstractCegarLoop]: Abstraction has has 186 places, 163 transitions, 1818 flow [2021-11-09 09:36:06,519 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) [2021-11-09 09:36:06,519 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:36:06,520 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] [2021-11-09 09:36:06,560 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-09 09:36:06,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:36:06,737 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:36:06,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:36:06,738 INFO L85 PathProgramCache]: Analyzing trace with hash -2073106453, now seen corresponding path program 6 times [2021-11-09 09:36:06,738 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:36:06,738 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156601518] [2021-11-09 09:36:06,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:36:06,738 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:36:06,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:06,909 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:36:06,909 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:36:06,909 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156601518] [2021-11-09 09:36:06,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156601518] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:36:06,909 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385316054] [2021-11-09 09:36:06,910 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 09:36:06,910 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:36:06,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:36:06,911 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:36:06,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-09 09:36:07,166 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-11-09 09:36:07,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:36:07,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-09 09:36:07,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:36:07,507 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:36:07,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385316054] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:36:07,508 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:36:07,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-11-09 09:36:07,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079498977] [2021-11-09 09:36:07,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-09 09:36:07,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:36:07,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-09 09:36:07,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-11-09 09:36:07,512 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-09 09:36:07,513 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 163 transitions, 1818 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) [2021-11-09 09:36:07,514 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:36:07,514 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-09 09:36:07,514 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:36:08,123 INFO L129 PetriNetUnfolder]: 102/591 cut-off events. [2021-11-09 09:36:08,124 INFO L130 PetriNetUnfolder]: For 12256/12330 co-relation queries the response was YES. [2021-11-09 09:36:08,130 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2572 conditions, 591 events. 102/591 cut-off events. For 12256/12330 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2971 event pairs, 0 based on Foata normal form. 28/561 useless extension candidates. Maximal degree in co-relation 2485. Up to 96 conditions per place. [2021-11-09 09:36:08,138 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 50 selfloop transitions, 87 changer transitions 8/189 dead transitions. [2021-11-09 09:36:08,139 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 189 transitions, 3050 flow [2021-11-09 09:36:08,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-09 09:36:08,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-11-09 09:36:08,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1336 transitions. [2021-11-09 09:36:08,143 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8434343434343434 [2021-11-09 09:36:08,143 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1336 transitions. [2021-11-09 09:36:08,143 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1336 transitions. [2021-11-09 09:36:08,144 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:36:08,145 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1336 transitions. [2021-11-09 09:36:08,148 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 55.666666666666664) internal successors, (1336), 24 states have internal predecessors, (1336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:36:08,152 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) [2021-11-09 09:36:08,154 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) [2021-11-09 09:36:08,154 INFO L186 Difference]: Start difference. First operand has 186 places, 163 transitions, 1818 flow. Second operand 24 states and 1336 transitions. [2021-11-09 09:36:08,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 189 transitions, 3050 flow [2021-11-09 09:36:08,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 189 transitions, 2552 flow, removed 189 selfloop flow, removed 25 redundant places. [2021-11-09 09:36:08,204 INFO L242 Difference]: Finished difference. Result has 186 places, 169 transitions, 1818 flow [2021-11-09 09:36:08,205 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=1448, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1818, PETRI_PLACES=186, PETRI_TRANSITIONS=169} [2021-11-09 09:36:08,205 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 120 predicate places. [2021-11-09 09:36:08,205 INFO L470 AbstractCegarLoop]: Abstraction has has 186 places, 169 transitions, 1818 flow [2021-11-09 09:36:08,206 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) [2021-11-09 09:36:08,206 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:36:08,206 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] [2021-11-09 09:36:08,246 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-09 09:36:08,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-09 09:36:08,423 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:36:08,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:36:08,424 INFO L85 PathProgramCache]: Analyzing trace with hash -142496668, now seen corresponding path program 7 times [2021-11-09 09:36:08,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:36:08,424 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088312762] [2021-11-09 09:36:08,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:36:08,424 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:36:08,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:08,651 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:36:08,651 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:36:08,651 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088312762] [2021-11-09 09:36:08,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088312762] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:36:08,652 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035467538] [2021-11-09 09:36:08,652 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 09:36:08,652 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:36:08,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:36:08,654 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:36:08,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-09 09:36:08,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:08,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-09 09:36:08,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:36:09,336 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:36:09,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035467538] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:36:09,337 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:36:09,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-11-09 09:36:09,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315015139] [2021-11-09 09:36:09,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-09 09:36:09,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:36:09,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-09 09:36:09,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-11-09 09:36:09,342 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-09 09:36:09,344 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 169 transitions, 1818 flow. Second operand has 15 states, 15 states have (on average 54.06666666666667) internal successors, (811), 15 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:36:09,344 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:36:09,344 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-09 09:36:09,344 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:36:09,817 INFO L129 PetriNetUnfolder]: 130/850 cut-off events. [2021-11-09 09:36:09,817 INFO L130 PetriNetUnfolder]: For 15044/15126 co-relation queries the response was YES. [2021-11-09 09:36:09,828 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3380 conditions, 850 events. 130/850 cut-off events. For 15044/15126 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 5206 event pairs, 0 based on Foata normal form. 28/783 useless extension candidates. Maximal degree in co-relation 3295. Up to 141 conditions per place. [2021-11-09 09:36:09,840 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 124 selfloop transitions, 49 changer transitions 8/225 dead transitions. [2021-11-09 09:36:09,841 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 225 transitions, 3428 flow [2021-11-09 09:36:09,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-09 09:36:09,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-11-09 09:36:09,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1056 transitions. [2021-11-09 09:36:09,844 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8421052631578947 [2021-11-09 09:36:09,845 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1056 transitions. [2021-11-09 09:36:09,845 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1056 transitions. [2021-11-09 09:36:09,846 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:36:09,846 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1056 transitions. [2021-11-09 09:36:09,850 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 55.578947368421055) internal successors, (1056), 19 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:36:09,853 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) [2021-11-09 09:36:09,854 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) [2021-11-09 09:36:09,855 INFO L186 Difference]: Start difference. First operand has 186 places, 169 transitions, 1818 flow. Second operand 19 states and 1056 transitions. [2021-11-09 09:36:09,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 225 transitions, 3428 flow [2021-11-09 09:36:09,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 225 transitions, 3079 flow, removed 93 selfloop flow, removed 19 redundant places. [2021-11-09 09:36:09,926 INFO L242 Difference]: Finished difference. Result has 193 places, 197 transitions, 2227 flow [2021-11-09 09:36:09,927 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=1581, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=2227, PETRI_PLACES=193, PETRI_TRANSITIONS=197} [2021-11-09 09:36:09,927 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 127 predicate places. [2021-11-09 09:36:09,927 INFO L470 AbstractCegarLoop]: Abstraction has has 193 places, 197 transitions, 2227 flow [2021-11-09 09:36:09,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 54.06666666666667) internal successors, (811), 15 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:36:09,928 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:36:09,929 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] [2021-11-09 09:36:09,972 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-09 09:36:10,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:36:10,148 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:36:10,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:36:10,148 INFO L85 PathProgramCache]: Analyzing trace with hash 1027482686, now seen corresponding path program 8 times [2021-11-09 09:36:10,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:36:10,149 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906777093] [2021-11-09 09:36:10,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:36:10,149 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:36:10,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:10,385 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:36:10,386 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:36:10,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906777093] [2021-11-09 09:36:10,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906777093] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:36:10,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508010447] [2021-11-09 09:36:10,386 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:36:10,387 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:36:10,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:36:10,391 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:36:10,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-09 09:36:10,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:36:10,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:36:10,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-09 09:36:10,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:36:11,085 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:36:11,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508010447] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:36:11,085 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:36:11,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-11-09 09:36:11,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557876310] [2021-11-09 09:36:11,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-09 09:36:11,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:36:11,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-09 09:36:11,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-11-09 09:36:11,091 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-09 09:36:11,093 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 197 transitions, 2227 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) [2021-11-09 09:36:11,093 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:36:11,093 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-09 09:36:11,094 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:36:11,716 INFO L129 PetriNetUnfolder]: 160/1120 cut-off events. [2021-11-09 09:36:11,716 INFO L130 PetriNetUnfolder]: For 20838/20925 co-relation queries the response was YES. [2021-11-09 09:36:11,730 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4389 conditions, 1120 events. 160/1120 cut-off events. For 20838/20925 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 7843 event pairs, 0 based on Foata normal form. 33/1030 useless extension candidates. Maximal degree in co-relation 4296. Up to 164 conditions per place. [2021-11-09 09:36:11,743 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 117 selfloop transitions, 88 changer transitions 8/257 dead transitions. [2021-11-09 09:36:11,743 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 257 transitions, 4044 flow [2021-11-09 09:36:11,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-09 09:36:11,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-11-09 09:36:11,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1276 transitions. [2021-11-09 09:36:11,756 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8405797101449275 [2021-11-09 09:36:11,756 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1276 transitions. [2021-11-09 09:36:11,756 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1276 transitions. [2021-11-09 09:36:11,759 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:36:11,759 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1276 transitions. [2021-11-09 09:36:11,767 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 55.47826086956522) internal successors, (1276), 23 states have internal predecessors, (1276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:36:11,782 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 66.0) internal successors, (1584), 24 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:36:11,793 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 66.0) internal successors, (1584), 24 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:36:11,793 INFO L186 Difference]: Start difference. First operand has 193 places, 197 transitions, 2227 flow. Second operand 23 states and 1276 transitions. [2021-11-09 09:36:11,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 257 transitions, 4044 flow [2021-11-09 09:36:11,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 257 transitions, 3834 flow, removed 84 selfloop flow, removed 10 redundant places. [2021-11-09 09:36:11,925 INFO L242 Difference]: Finished difference. Result has 214 places, 228 transitions, 3027 flow [2021-11-09 09:36:11,926 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=2111, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=3027, PETRI_PLACES=214, PETRI_TRANSITIONS=228} [2021-11-09 09:36:11,926 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 148 predicate places. [2021-11-09 09:36:11,926 INFO L470 AbstractCegarLoop]: Abstraction has has 214 places, 228 transitions, 3027 flow [2021-11-09 09:36:11,927 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) [2021-11-09 09:36:11,927 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:36:11,927 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] [2021-11-09 09:36:11,965 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-09 09:36:12,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-09 09:36:12,128 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:36:12,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:36:12,128 INFO L85 PathProgramCache]: Analyzing trace with hash -45491924, now seen corresponding path program 9 times [2021-11-09 09:36:12,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:36:12,128 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958606305] [2021-11-09 09:36:12,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:36:12,129 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:36:12,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:12,320 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:36:12,320 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:36:12,320 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958606305] [2021-11-09 09:36:12,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958606305] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:36:12,321 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999061942] [2021-11-09 09:36:12,321 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:36:12,321 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:36:12,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:36:12,323 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:36:12,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-09 09:36:12,640 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-09 09:36:12,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:36:12,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-09 09:36:12,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:36:12,984 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:36:12,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999061942] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:36:12,984 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:36:12,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-11-09 09:36:12,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119868104] [2021-11-09 09:36:12,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-09 09:36:12,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:36:12,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-09 09:36:12,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-11-09 09:36:12,988 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-09 09:36:12,989 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 228 transitions, 3027 flow. Second operand has 15 states, 15 states have (on average 54.06666666666667) internal successors, (811), 15 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:36:12,989 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:36:12,989 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-09 09:36:12,989 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:36:13,576 INFO L129 PetriNetUnfolder]: 188/1323 cut-off events. [2021-11-09 09:36:13,577 INFO L130 PetriNetUnfolder]: For 26108/26234 co-relation queries the response was YES. [2021-11-09 09:36:13,645 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5407 conditions, 1323 events. 188/1323 cut-off events. For 26108/26234 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 10082 event pairs, 0 based on Foata normal form. 46/1225 useless extension candidates. Maximal degree in co-relation 5305. Up to 200 conditions per place. [2021-11-09 09:36:13,660 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 105 selfloop transitions, 128 changer transitions 8/285 dead transitions. [2021-11-09 09:36:13,660 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 285 transitions, 4887 flow [2021-11-09 09:36:13,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-09 09:36:13,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-11-09 09:36:13,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1221 transitions. [2021-11-09 09:36:13,667 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8409090909090909 [2021-11-09 09:36:13,667 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1221 transitions. [2021-11-09 09:36:13,667 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1221 transitions. [2021-11-09 09:36:13,668 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:36:13,668 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1221 transitions. [2021-11-09 09:36:13,671 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 55.5) internal successors, (1221), 22 states have internal predecessors, (1221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:36:13,679 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 66.0) internal successors, (1518), 23 states have internal predecessors, (1518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:36:13,680 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 66.0) internal successors, (1518), 23 states have internal predecessors, (1518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:36:13,681 INFO L186 Difference]: Start difference. First operand has 214 places, 228 transitions, 3027 flow. Second operand 22 states and 1221 transitions. [2021-11-09 09:36:13,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 285 transitions, 4887 flow [2021-11-09 09:36:13,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 285 transitions, 4556 flow, removed 134 selfloop flow, removed 13 redundant places. [2021-11-09 09:36:13,794 INFO L242 Difference]: Finished difference. Result has 230 places, 259 transitions, 3784 flow [2021-11-09 09:36:13,794 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=2798, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=3784, PETRI_PLACES=230, PETRI_TRANSITIONS=259} [2021-11-09 09:36:13,794 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 164 predicate places. [2021-11-09 09:36:13,795 INFO L470 AbstractCegarLoop]: Abstraction has has 230 places, 259 transitions, 3784 flow [2021-11-09 09:36:13,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 54.06666666666667) internal successors, (811), 15 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:36:13,796 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:36:13,796 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] [2021-11-09 09:36:13,836 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-09 09:36:14,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-09 09:36:14,023 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:36:14,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:36:14,024 INFO L85 PathProgramCache]: Analyzing trace with hash -89616114, now seen corresponding path program 10 times [2021-11-09 09:36:14,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:36:14,024 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666438298] [2021-11-09 09:36:14,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:36:14,024 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:36:14,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:14,187 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:36:14,188 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:36:14,188 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666438298] [2021-11-09 09:36:14,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666438298] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:36:14,188 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637933898] [2021-11-09 09:36:14,188 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 09:36:14,189 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:36:14,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:36:14,190 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:36:14,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-09 09:36:14,525 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 09:36:14,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:36:14,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-09 09:36:14,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:36:14,838 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:36:14,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637933898] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:36:14,838 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:36:14,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-11-09 09:36:14,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460513639] [2021-11-09 09:36:14,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-09 09:36:14,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:36:14,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-09 09:36:14,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-11-09 09:36:14,840 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-09 09:36:14,841 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 259 transitions, 3784 flow. Second operand has 15 states, 15 states have (on average 54.06666666666667) internal successors, (811), 15 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:36:14,841 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:36:14,841 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-09 09:36:14,841 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:36:15,681 INFO L129 PetriNetUnfolder]: 205/1423 cut-off events. [2021-11-09 09:36:15,681 INFO L130 PetriNetUnfolder]: For 31559/31687 co-relation queries the response was YES. [2021-11-09 09:36:15,702 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6170 conditions, 1423 events. 205/1423 cut-off events. For 31559/31687 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 10885 event pairs, 0 based on Foata normal form. 56/1331 useless extension candidates. Maximal degree in co-relation 6061. Up to 218 conditions per place. [2021-11-09 09:36:15,720 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 58 selfloop transitions, 185 changer transitions 8/295 dead transitions. [2021-11-09 09:36:15,720 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 295 transitions, 5614 flow [2021-11-09 09:36:15,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-09 09:36:15,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-11-09 09:36:15,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1561 transitions. [2021-11-09 09:36:15,727 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8446969696969697 [2021-11-09 09:36:15,727 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1561 transitions. [2021-11-09 09:36:15,727 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1561 transitions. [2021-11-09 09:36:15,728 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:36:15,728 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1561 transitions. [2021-11-09 09:36:15,732 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 55.75) internal successors, (1561), 28 states have internal predecessors, (1561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:36:15,736 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 66.0) internal successors, (1914), 29 states have internal predecessors, (1914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:36:15,737 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 66.0) internal successors, (1914), 29 states have internal predecessors, (1914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:36:15,737 INFO L186 Difference]: Start difference. First operand has 230 places, 259 transitions, 3784 flow. Second operand 28 states and 1561 transitions. [2021-11-09 09:36:15,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 295 transitions, 5614 flow [2021-11-09 09:36:15,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 295 transitions, 5224 flow, removed 159 selfloop flow, removed 12 redundant places. [2021-11-09 09:36:15,922 INFO L242 Difference]: Finished difference. Result has 249 places, 268 transitions, 4244 flow [2021-11-09 09:36:15,922 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=3574, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=176, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=4244, PETRI_PLACES=249, PETRI_TRANSITIONS=268} [2021-11-09 09:36:15,923 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 183 predicate places. [2021-11-09 09:36:15,923 INFO L470 AbstractCegarLoop]: Abstraction has has 249 places, 268 transitions, 4244 flow [2021-11-09 09:36:15,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 54.06666666666667) internal successors, (811), 15 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:36:15,924 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:36:15,924 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] [2021-11-09 09:36:15,965 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-09 09:36:16,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-09 09:36:16,139 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:36:16,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:36:16,139 INFO L85 PathProgramCache]: Analyzing trace with hash 96961072, now seen corresponding path program 11 times [2021-11-09 09:36:16,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:36:16,140 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73819068] [2021-11-09 09:36:16,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:36:16,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:36:16,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:16,304 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:36:16,304 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:36:16,304 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73819068] [2021-11-09 09:36:16,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73819068] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:36:16,305 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581362767] [2021-11-09 09:36:16,305 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 09:36:16,305 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:36:16,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:36:16,306 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:36:16,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-09 09:36:16,754 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-11-09 09:36:16,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:36:16,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-09 09:36:16,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:36:17,055 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:36:17,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581362767] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:36:17,055 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:36:17,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-11-09 09:36:17,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592852117] [2021-11-09 09:36:17,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-09 09:36:17,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:36:17,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-09 09:36:17,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-09 09:36:17,059 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-09 09:36:17,061 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 268 transitions, 4244 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) [2021-11-09 09:36:17,061 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:36:17,061 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-09 09:36:17,061 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:36:18,022 INFO L129 PetriNetUnfolder]: 200/1408 cut-off events. [2021-11-09 09:36:18,023 INFO L130 PetriNetUnfolder]: For 32704/32879 co-relation queries the response was YES. [2021-11-09 09:36:18,040 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6244 conditions, 1408 events. 200/1408 cut-off events. For 32704/32879 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 10875 event pairs, 0 based on Foata normal form. 68/1329 useless extension candidates. Maximal degree in co-relation 6131. Up to 214 conditions per place. [2021-11-09 09:36:18,056 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 54 selfloop transitions, 189 changer transitions 11/298 dead transitions. [2021-11-09 09:36:18,056 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 298 transitions, 6006 flow [2021-11-09 09:36:18,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-09 09:36:18,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-11-09 09:36:18,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1669 transitions. [2021-11-09 09:36:18,059 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.842929292929293 [2021-11-09 09:36:18,060 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1669 transitions. [2021-11-09 09:36:18,060 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1669 transitions. [2021-11-09 09:36:18,060 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:36:18,061 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1669 transitions. [2021-11-09 09:36:18,064 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 55.63333333333333) internal successors, (1669), 30 states have internal predecessors, (1669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:36:18,068 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 66.0) internal successors, (2046), 31 states have internal predecessors, (2046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:36:18,069 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 66.0) internal successors, (2046), 31 states have internal predecessors, (2046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:36:18,069 INFO L186 Difference]: Start difference. First operand has 249 places, 268 transitions, 4244 flow. Second operand 30 states and 1669 transitions. [2021-11-09 09:36:18,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 298 transitions, 6006 flow [2021-11-09 09:36:18,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 298 transitions, 5416 flow, removed 136 selfloop flow, removed 23 redundant places. [2021-11-09 09:36:18,186 INFO L242 Difference]: Finished difference. Result has 258 places, 271 transitions, 4307 flow [2021-11-09 09:36:18,186 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=3786, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=186, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=4307, PETRI_PLACES=258, PETRI_TRANSITIONS=271} [2021-11-09 09:36:18,186 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 192 predicate places. [2021-11-09 09:36:18,187 INFO L470 AbstractCegarLoop]: Abstraction has has 258 places, 271 transitions, 4307 flow [2021-11-09 09:36:18,187 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) [2021-11-09 09:36:18,187 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:36:18,188 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] [2021-11-09 09:36:18,216 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-09 09:36:18,398 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-09 09:36:18,398 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:36:18,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:36:18,399 INFO L85 PathProgramCache]: Analyzing trace with hash -1109597357, now seen corresponding path program 12 times [2021-11-09 09:36:18,399 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:36:18,400 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998269994] [2021-11-09 09:36:18,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:36:18,400 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:36:18,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:18,664 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:36:18,664 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:36:18,665 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998269994] [2021-11-09 09:36:18,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998269994] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:36:18,665 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600362787] [2021-11-09 09:36:18,665 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 09:36:18,665 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:36:18,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:36:18,667 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:36:18,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-09 09:36:19,068 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-11-09 09:36:19,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:36:19,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-09 09:36:19,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:36:19,615 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:36:19,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600362787] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:36:19,616 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:36:19,616 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-11-09 09:36:19,616 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960021857] [2021-11-09 09:36:19,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-09 09:36:19,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:36:19,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-09 09:36:19,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-11-09 09:36:19,620 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-09 09:36:19,622 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 271 transitions, 4307 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) [2021-11-09 09:36:19,622 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:36:19,622 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-09 09:36:19,622 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:36:20,295 INFO L129 PetriNetUnfolder]: 202/1412 cut-off events. [2021-11-09 09:36:20,295 INFO L130 PetriNetUnfolder]: For 31444/31611 co-relation queries the response was YES. [2021-11-09 09:36:20,313 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6269 conditions, 1412 events. 202/1412 cut-off events. For 31444/31611 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 10852 event pairs, 0 based on Foata normal form. 38/1296 useless extension candidates. Maximal degree in co-relation 6153. Up to 318 conditions per place. [2021-11-09 09:36:20,330 INFO L132 encePairwiseOnDemand]: 60/66 looper letters, 219 selfloop transitions, 29 changer transitions 8/300 dead transitions. [2021-11-09 09:36:20,331 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 300 transitions, 5737 flow [2021-11-09 09:36:20,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-09 09:36:20,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-11-09 09:36:20,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1055 transitions. [2021-11-09 09:36:20,333 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8413078149920256 [2021-11-09 09:36:20,333 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1055 transitions. [2021-11-09 09:36:20,333 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1055 transitions. [2021-11-09 09:36:20,334 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:36:20,334 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1055 transitions. [2021-11-09 09:36:20,336 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 55.526315789473685) internal successors, (1055), 19 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:36:20,339 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) [2021-11-09 09:36:20,340 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) [2021-11-09 09:36:20,340 INFO L186 Difference]: Start difference. First operand has 258 places, 271 transitions, 4307 flow. Second operand 19 states and 1055 transitions. [2021-11-09 09:36:20,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 300 transitions, 5737 flow [2021-11-09 09:36:20,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 300 transitions, 5280 flow, removed 51 selfloop flow, removed 27 redundant places. [2021-11-09 09:36:20,452 INFO L242 Difference]: Finished difference. Result has 253 places, 275 transitions, 4080 flow [2021-11-09 09:36:20,452 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=3864, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=4080, PETRI_PLACES=253, PETRI_TRANSITIONS=275} [2021-11-09 09:36:20,453 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 187 predicate places. [2021-11-09 09:36:20,453 INFO L470 AbstractCegarLoop]: Abstraction has has 253 places, 275 transitions, 4080 flow [2021-11-09 09:36:20,453 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) [2021-11-09 09:36:20,453 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:36:20,453 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] [2021-11-09 09:36:20,475 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-09 09:36:20,654 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:36:20,654 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:36:20,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:36:20,654 INFO L85 PathProgramCache]: Analyzing trace with hash -1871687997, now seen corresponding path program 13 times [2021-11-09 09:36:20,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:36:20,655 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021681333] [2021-11-09 09:36:20,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:36:20,655 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:36:20,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:20,922 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:36:20,922 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:36:20,922 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021681333] [2021-11-09 09:36:20,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021681333] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:36:20,923 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870430743] [2021-11-09 09:36:20,923 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 09:36:20,923 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:36:20,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:36:20,924 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:36:20,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-09 09:36:21,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:21,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-09 09:36:21,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:36:22,122 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:36:22,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870430743] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:36:22,122 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:36:22,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-11-09 09:36:22,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466138231] [2021-11-09 09:36:22,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-09 09:36:22,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:36:22,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-09 09:36:22,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-11-09 09:36:22,126 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-09 09:36:22,127 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 275 transitions, 4080 flow. Second operand has 18 states, 18 states have (on average 54.166666666666664) internal successors, (975), 18 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:36:22,127 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:36:22,127 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-09 09:36:22,128 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:36:22,917 INFO L129 PetriNetUnfolder]: 206/1441 cut-off events. [2021-11-09 09:36:22,917 INFO L130 PetriNetUnfolder]: For 36891/37073 co-relation queries the response was YES. [2021-11-09 09:36:22,930 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6470 conditions, 1441 events. 206/1441 cut-off events. For 36891/37073 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 11078 event pairs, 0 based on Foata normal form. 42/1326 useless extension candidates. Maximal degree in co-relation 6351. Up to 282 conditions per place. [2021-11-09 09:36:22,945 INFO L132 encePairwiseOnDemand]: 60/66 looper letters, 201 selfloop transitions, 53 changer transitions 8/306 dead transitions. [2021-11-09 09:36:22,946 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 306 transitions, 5635 flow [2021-11-09 09:36:22,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-09 09:36:22,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-11-09 09:36:22,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1222 transitions. [2021-11-09 09:36:22,949 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8415977961432507 [2021-11-09 09:36:22,949 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1222 transitions. [2021-11-09 09:36:22,949 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1222 transitions. [2021-11-09 09:36:22,950 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:36:22,950 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1222 transitions. [2021-11-09 09:36:22,953 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 55.54545454545455) internal successors, (1222), 22 states have internal predecessors, (1222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:36:22,956 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 66.0) internal successors, (1518), 23 states have internal predecessors, (1518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:36:22,957 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 66.0) internal successors, (1518), 23 states have internal predecessors, (1518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:36:22,957 INFO L186 Difference]: Start difference. First operand has 253 places, 275 transitions, 4080 flow. Second operand 22 states and 1222 transitions. [2021-11-09 09:36:22,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 306 transitions, 5635 flow [2021-11-09 09:36:23,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 306 transitions, 5425 flow, removed 94 selfloop flow, removed 8 redundant places. [2021-11-09 09:36:23,078 INFO L242 Difference]: Finished difference. Result has 271 places, 280 transitions, 4245 flow [2021-11-09 09:36:23,079 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=3962, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=4245, PETRI_PLACES=271, PETRI_TRANSITIONS=280} [2021-11-09 09:36:23,079 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 205 predicate places. [2021-11-09 09:36:23,080 INFO L470 AbstractCegarLoop]: Abstraction has has 271 places, 280 transitions, 4245 flow [2021-11-09 09:36:23,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 54.166666666666664) internal successors, (975), 18 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:36:23,080 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:36:23,081 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] [2021-11-09 09:36:23,111 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-09 09:36:23,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:36:23,291 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:36:23,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:36:23,292 INFO L85 PathProgramCache]: Analyzing trace with hash 2091658269, now seen corresponding path program 14 times [2021-11-09 09:36:23,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:36:23,292 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321811712] [2021-11-09 09:36:23,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:36:23,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:36:23,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:23,536 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:36:23,537 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:36:23,537 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321811712] [2021-11-09 09:36:23,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321811712] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:36:23,537 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704941503] [2021-11-09 09:36:23,537 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:36:23,538 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:36:23,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:36:23,539 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:36:23,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-09 09:36:24,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:36:24,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:36:24,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-09 09:36:24,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:36:24,772 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:36:24,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704941503] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:36:24,773 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:36:24,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-11-09 09:36:24,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095141451] [2021-11-09 09:36:24,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-09 09:36:24,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:36:24,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-09 09:36:24,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-11-09 09:36:24,775 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-09 09:36:24,777 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 280 transitions, 4245 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) [2021-11-09 09:36:24,777 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:36:24,777 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-09 09:36:24,777 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:36:25,381 INFO L129 PetriNetUnfolder]: 210/1484 cut-off events. [2021-11-09 09:36:25,381 INFO L130 PetriNetUnfolder]: For 37790/37949 co-relation queries the response was YES. [2021-11-09 09:36:25,400 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6660 conditions, 1484 events. 210/1484 cut-off events. For 37790/37949 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 11496 event pairs, 0 based on Foata normal form. 50/1372 useless extension candidates. Maximal degree in co-relation 6536. Up to 247 conditions per place. [2021-11-09 09:36:25,413 INFO L132 encePairwiseOnDemand]: 60/66 looper letters, 181 selfloop transitions, 78 changer transitions 8/311 dead transitions. [2021-11-09 09:36:25,414 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 311 transitions, 5787 flow [2021-11-09 09:36:25,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-09 09:36:25,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-11-09 09:36:25,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1278 transitions. [2021-11-09 09:36:25,416 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.841897233201581 [2021-11-09 09:36:25,417 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1278 transitions. [2021-11-09 09:36:25,417 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1278 transitions. [2021-11-09 09:36:25,417 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:36:25,418 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1278 transitions. [2021-11-09 09:36:25,420 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 55.56521739130435) internal successors, (1278), 23 states have internal predecessors, (1278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:36:25,423 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 66.0) internal successors, (1584), 24 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:36:25,423 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 66.0) internal successors, (1584), 24 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:36:25,424 INFO L186 Difference]: Start difference. First operand has 271 places, 280 transitions, 4245 flow. Second operand 23 states and 1278 transitions. [2021-11-09 09:36:25,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 311 transitions, 5787 flow [2021-11-09 09:36:25,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 311 transitions, 5598 flow, removed 79 selfloop flow, removed 10 redundant places. [2021-11-09 09:36:25,538 INFO L242 Difference]: Finished difference. Result has 288 places, 285 transitions, 4477 flow [2021-11-09 09:36:25,538 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=4132, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=4477, PETRI_PLACES=288, PETRI_TRANSITIONS=285} [2021-11-09 09:36:25,539 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 222 predicate places. [2021-11-09 09:36:25,539 INFO L470 AbstractCegarLoop]: Abstraction has has 288 places, 285 transitions, 4477 flow [2021-11-09 09:36:25,540 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) [2021-11-09 09:36:25,540 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:36:25,540 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] [2021-11-09 09:36:25,575 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-09 09:36:25,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-09 09:36:25,755 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:36:25,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:36:25,756 INFO L85 PathProgramCache]: Analyzing trace with hash 612825563, now seen corresponding path program 15 times [2021-11-09 09:36:25,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:36:25,756 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583744656] [2021-11-09 09:36:25,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:36:25,756 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:36:25,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:25,972 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:36:25,973 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:36:25,973 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583744656] [2021-11-09 09:36:25,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583744656] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:36:25,973 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411013887] [2021-11-09 09:36:25,973 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:36:25,973 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:36:25,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:36:25,979 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:36:25,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-09 09:36:26,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-09 09:36:26,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:36:26,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-09 09:36:26,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:36:26,902 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:36:26,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411013887] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:36:26,903 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:36:26,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-11-09 09:36:26,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259098922] [2021-11-09 09:36:26,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-09 09:36:26,904 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:36:26,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-09 09:36:26,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-11-09 09:36:26,906 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-09 09:36:26,907 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 285 transitions, 4477 flow. Second operand has 18 states, 18 states have (on average 54.166666666666664) internal successors, (975), 18 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:36:26,907 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:36:26,907 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-09 09:36:26,907 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:36:27,727 INFO L129 PetriNetUnfolder]: 221/1576 cut-off events. [2021-11-09 09:36:27,727 INFO L130 PetriNetUnfolder]: For 40407/40586 co-relation queries the response was YES. [2021-11-09 09:36:27,755 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7134 conditions, 1576 events. 221/1576 cut-off events. For 40407/40586 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 12455 event pairs, 0 based on Foata normal form. 58/1464 useless extension candidates. Maximal degree in co-relation 7005. Up to 248 conditions per place. [2021-11-09 09:36:27,769 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 134 selfloop transitions, 142 changer transitions 8/328 dead transitions. [2021-11-09 09:36:27,769 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 328 transitions, 6344 flow [2021-11-09 09:36:27,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-09 09:36:27,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-11-09 09:36:27,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1499 transitions. [2021-11-09 09:36:27,773 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8411896745230079 [2021-11-09 09:36:27,773 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1499 transitions. [2021-11-09 09:36:27,773 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1499 transitions. [2021-11-09 09:36:27,774 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:36:27,774 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1499 transitions. [2021-11-09 09:36:27,777 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 55.51851851851852) internal successors, (1499), 27 states have internal predecessors, (1499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:36:27,780 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 66.0) internal successors, (1848), 28 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:36:27,781 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 66.0) internal successors, (1848), 28 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:36:27,781 INFO L186 Difference]: Start difference. First operand has 288 places, 285 transitions, 4477 flow. Second operand 27 states and 1499 transitions. [2021-11-09 09:36:27,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 328 transitions, 6344 flow [2021-11-09 09:36:27,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 328 transitions, 6119 flow, removed 86 selfloop flow, removed 12 redundant places. [2021-11-09 09:36:27,951 INFO L242 Difference]: Finished difference. Result has 309 places, 297 transitions, 5072 flow [2021-11-09 09:36:27,952 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=4340, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=5072, PETRI_PLACES=309, PETRI_TRANSITIONS=297} [2021-11-09 09:36:27,952 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 243 predicate places. [2021-11-09 09:36:27,953 INFO L470 AbstractCegarLoop]: Abstraction has has 309 places, 297 transitions, 5072 flow [2021-11-09 09:36:27,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 54.166666666666664) internal successors, (975), 18 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:36:27,953 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:36:27,954 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] [2021-11-09 09:36:27,994 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-09 09:36:28,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:36:28,179 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:36:28,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:36:28,179 INFO L85 PathProgramCache]: Analyzing trace with hash 777552157, now seen corresponding path program 16 times [2021-11-09 09:36:28,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:36:28,180 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813882526] [2021-11-09 09:36:28,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:36:28,180 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:36:28,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:28,378 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:36:28,379 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:36:28,379 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813882526] [2021-11-09 09:36:28,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813882526] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:36:28,379 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380376143] [2021-11-09 09:36:28,379 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 09:36:28,380 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:36:28,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:36:28,381 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:36:28,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-09 09:36:29,058 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 09:36:29,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:36:29,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-09 09:36:29,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:36:29,372 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:36:29,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380376143] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:36:29,373 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:36:29,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-11-09 09:36:29,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4714827] [2021-11-09 09:36:29,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-09 09:36:29,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:36:29,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-09 09:36:29,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-11-09 09:36:29,376 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-09 09:36:29,377 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 297 transitions, 5072 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) [2021-11-09 09:36:29,377 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:36:29,377 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-09 09:36:29,378 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:36:30,278 INFO L129 PetriNetUnfolder]: 231/1652 cut-off events. [2021-11-09 09:36:30,279 INFO L130 PetriNetUnfolder]: For 45974/46164 co-relation queries the response was YES. [2021-11-09 09:36:30,300 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7768 conditions, 1652 events. 231/1652 cut-off events. For 45974/46164 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 13256 event pairs, 0 based on Foata normal form. 72/1546 useless extension candidates. Maximal degree in co-relation 7631. Up to 262 conditions per place. [2021-11-09 09:36:30,316 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 106 selfloop transitions, 178 changer transitions 8/336 dead transitions. [2021-11-09 09:36:30,316 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 336 transitions, 6907 flow [2021-11-09 09:36:30,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-09 09:36:30,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-11-09 09:36:30,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1555 transitions. [2021-11-09 09:36:30,320 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8414502164502164 [2021-11-09 09:36:30,320 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1555 transitions. [2021-11-09 09:36:30,320 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1555 transitions. [2021-11-09 09:36:30,321 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:36:30,322 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1555 transitions. [2021-11-09 09:36:30,326 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 55.535714285714285) internal successors, (1555), 28 states have internal predecessors, (1555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:36:30,330 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 66.0) internal successors, (1914), 29 states have internal predecessors, (1914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:36:30,331 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 66.0) internal successors, (1914), 29 states have internal predecessors, (1914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:36:30,331 INFO L186 Difference]: Start difference. First operand has 309 places, 297 transitions, 5072 flow. Second operand 28 states and 1555 transitions. [2021-11-09 09:36:30,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 336 transitions, 6907 flow [2021-11-09 09:36:30,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 336 transitions, 6551 flow, removed 102 selfloop flow, removed 20 redundant places. [2021-11-09 09:36:30,556 INFO L242 Difference]: Finished difference. Result has 322 places, 309 transitions, 5558 flow [2021-11-09 09:36:30,557 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=4770, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=5558, PETRI_PLACES=322, PETRI_TRANSITIONS=309} [2021-11-09 09:36:30,557 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 256 predicate places. [2021-11-09 09:36:30,558 INFO L470 AbstractCegarLoop]: Abstraction has has 322 places, 309 transitions, 5558 flow [2021-11-09 09:36:30,558 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) [2021-11-09 09:36:30,558 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:36:30,559 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] [2021-11-09 09:36:30,598 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-09 09:36:30,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-09 09:36:30,777 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:36:30,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:36:30,778 INFO L85 PathProgramCache]: Analyzing trace with hash 1434787855, now seen corresponding path program 17 times [2021-11-09 09:36:30,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:36:30,778 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345997492] [2021-11-09 09:36:30,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:36:30,778 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:36:30,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:30,937 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:36:30,938 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:36:30,938 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345997492] [2021-11-09 09:36:30,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345997492] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:36:30,938 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742016922] [2021-11-09 09:36:30,938 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 09:36:30,938 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:36:30,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:36:30,939 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:36:30,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-09 09:36:31,499 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-11-09 09:36:31,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:36:31,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-09 09:36:31,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:36:31,847 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:36:31,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742016922] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:36:31,848 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:36:31,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-11-09 09:36:31,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610906684] [2021-11-09 09:36:31,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-09 09:36:31,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:36:31,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-09 09:36:31,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-11-09 09:36:31,851 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-09 09:36:31,852 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 309 transitions, 5558 flow. Second operand has 18 states, 18 states have (on average 54.166666666666664) internal successors, (975), 18 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:36:31,852 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:36:31,852 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-09 09:36:31,853 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:36:32,816 INFO L129 PetriNetUnfolder]: 247/1796 cut-off events. [2021-11-09 09:36:32,816 INFO L130 PetriNetUnfolder]: For 53358/53553 co-relation queries the response was YES. [2021-11-09 09:36:32,832 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8636 conditions, 1796 events. 247/1796 cut-off events. For 53358/53553 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 14877 event pairs, 0 based on Foata normal form. 74/1678 useless extension candidates. Maximal degree in co-relation 8494. Up to 286 conditions per place. [2021-11-09 09:36:32,848 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 103 selfloop transitions, 199 changer transitions 8/354 dead transitions. [2021-11-09 09:36:32,849 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 354 transitions, 7648 flow [2021-11-09 09:36:32,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-09 09:36:32,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-11-09 09:36:32,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1611 transitions. [2021-11-09 09:36:32,852 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.841692789968652 [2021-11-09 09:36:32,852 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1611 transitions. [2021-11-09 09:36:32,852 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1611 transitions. [2021-11-09 09:36:32,853 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:36:32,853 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1611 transitions. [2021-11-09 09:36:32,856 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 55.55172413793103) internal successors, (1611), 29 states have internal predecessors, (1611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:36:32,859 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) [2021-11-09 09:36:32,859 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) [2021-11-09 09:36:32,860 INFO L186 Difference]: Start difference. First operand has 322 places, 309 transitions, 5558 flow. Second operand 29 states and 1611 transitions. [2021-11-09 09:36:32,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 354 transitions, 7648 flow [2021-11-09 09:36:33,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 354 transitions, 7218 flow, removed 129 selfloop flow, removed 21 redundant places. [2021-11-09 09:36:33,070 INFO L242 Difference]: Finished difference. Result has 334 places, 326 transitions, 6209 flow [2021-11-09 09:36:33,071 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=5264, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=6209, PETRI_PLACES=334, PETRI_TRANSITIONS=326} [2021-11-09 09:36:33,071 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 268 predicate places. [2021-11-09 09:36:33,072 INFO L470 AbstractCegarLoop]: Abstraction has has 334 places, 326 transitions, 6209 flow [2021-11-09 09:36:33,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 54.166666666666664) internal successors, (975), 18 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:36:33,072 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:36:33,072 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] [2021-11-09 09:36:33,110 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-09 09:36:33,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-09 09:36:33,287 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:36:33,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:36:33,288 INFO L85 PathProgramCache]: Analyzing trace with hash 492394175, now seen corresponding path program 18 times [2021-11-09 09:36:33,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:36:33,288 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398882906] [2021-11-09 09:36:33,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:36:33,288 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:36:33,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:33,496 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:36:33,496 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:36:33,496 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398882906] [2021-11-09 09:36:33,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398882906] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:36:33,496 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244892815] [2021-11-09 09:36:33,497 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 09:36:33,497 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:36:33,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:36:33,507 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:36:33,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-09 09:36:34,129 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-11-09 09:36:34,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:36:34,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-09 09:36:34,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:36:34,458 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:36:34,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244892815] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:36:34,458 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:36:34,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-11-09 09:36:34,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763147854] [2021-11-09 09:36:34,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-09 09:36:34,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:36:34,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-09 09:36:34,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-11-09 09:36:34,461 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-09 09:36:34,462 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 326 transitions, 6209 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) [2021-11-09 09:36:34,462 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:36:34,462 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-09 09:36:34,462 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:36:35,416 INFO L129 PetriNetUnfolder]: 262/1916 cut-off events. [2021-11-09 09:36:35,416 INFO L130 PetriNetUnfolder]: For 57460/57656 co-relation queries the response was YES. [2021-11-09 09:36:35,433 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9297 conditions, 1916 events. 262/1916 cut-off events. For 57460/57656 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 16184 event pairs, 0 based on Foata normal form. 87/1798 useless extension candidates. Maximal degree in co-relation 9151. Up to 308 conditions per place. [2021-11-09 09:36:35,450 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 90 selfloop transitions, 228 changer transitions 8/370 dead transitions. [2021-11-09 09:36:35,450 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 370 transitions, 8276 flow [2021-11-09 09:36:35,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-09 09:36:35,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-11-09 09:36:35,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1667 transitions. [2021-11-09 09:36:35,453 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.841919191919192 [2021-11-09 09:36:35,454 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1667 transitions. [2021-11-09 09:36:35,454 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1667 transitions. [2021-11-09 09:36:35,454 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:36:35,455 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1667 transitions. [2021-11-09 09:36:35,458 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 55.56666666666667) internal successors, (1667), 30 states have internal predecessors, (1667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:36:35,460 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 66.0) internal successors, (2046), 31 states have internal predecessors, (2046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:36:35,461 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 66.0) internal successors, (2046), 31 states have internal predecessors, (2046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:36:35,461 INFO L186 Difference]: Start difference. First operand has 334 places, 326 transitions, 6209 flow. Second operand 30 states and 1667 transitions. [2021-11-09 09:36:35,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 370 transitions, 8276 flow [2021-11-09 09:36:35,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 370 transitions, 7802 flow, removed 110 selfloop flow, removed 23 redundant places. [2021-11-09 09:36:35,731 INFO L242 Difference]: Finished difference. Result has 346 places, 344 transitions, 6808 flow [2021-11-09 09:36:35,732 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=5799, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=210, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=6808, PETRI_PLACES=346, PETRI_TRANSITIONS=344} [2021-11-09 09:36:35,732 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 280 predicate places. [2021-11-09 09:36:35,732 INFO L470 AbstractCegarLoop]: Abstraction has has 346 places, 344 transitions, 6808 flow [2021-11-09 09:36:35,733 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) [2021-11-09 09:36:35,733 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:36:35,733 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] [2021-11-09 09:36:35,773 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-09 09:36:35,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-09 09:36:35,947 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:36:35,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:36:35,948 INFO L85 PathProgramCache]: Analyzing trace with hash 1570428305, now seen corresponding path program 19 times [2021-11-09 09:36:35,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:36:35,948 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370943088] [2021-11-09 09:36:35,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:36:35,948 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:36:35,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:36,138 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:36:36,138 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:36:36,138 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370943088] [2021-11-09 09:36:36,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370943088] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:36:36,139 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126221239] [2021-11-09 09:36:36,139 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 09:36:36,139 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:36:36,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:36:36,144 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:36:36,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-09 09:36:37,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:37,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-09 09:36:37,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:36:37,295 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:36:37,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126221239] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:36:37,296 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:36:37,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-11-09 09:36:37,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465040374] [2021-11-09 09:36:37,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-09 09:36:37,296 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:36:37,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-09 09:36:37,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-11-09 09:36:37,297 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-09 09:36:37,298 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 344 transitions, 6808 flow. Second operand has 18 states, 18 states have (on average 54.111111111111114) internal successors, (974), 18 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:36:37,299 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:36:37,299 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-09 09:36:37,299 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:36:38,434 INFO L129 PetriNetUnfolder]: 282/2020 cut-off events. [2021-11-09 09:36:38,434 INFO L130 PetriNetUnfolder]: For 67627/67877 co-relation queries the response was YES. [2021-11-09 09:36:38,463 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10326 conditions, 2020 events. 282/2020 cut-off events. For 67627/67877 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 17300 event pairs, 0 based on Foata normal form. 95/1901 useless extension candidates. Maximal degree in co-relation 10174. Up to 332 conditions per place. [2021-11-09 09:36:38,480 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 84 selfloop transitions, 254 changer transitions 14/396 dead transitions. [2021-11-09 09:36:38,480 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 396 transitions, 9603 flow [2021-11-09 09:36:38,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-09 09:36:38,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-11-09 09:36:38,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2004 transitions. [2021-11-09 09:36:38,483 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8434343434343434 [2021-11-09 09:36:38,484 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2004 transitions. [2021-11-09 09:36:38,484 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2004 transitions. [2021-11-09 09:36:38,485 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:36:38,485 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2004 transitions. [2021-11-09 09:36:38,488 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 55.666666666666664) internal successors, (2004), 36 states have internal predecessors, (2004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:36:38,492 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 66.0) internal successors, (2442), 37 states have internal predecessors, (2442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:36:38,492 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 66.0) internal successors, (2442), 37 states have internal predecessors, (2442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:36:38,492 INFO L186 Difference]: Start difference. First operand has 346 places, 344 transitions, 6808 flow. Second operand 36 states and 2004 transitions. [2021-11-09 09:36:38,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 396 transitions, 9603 flow [2021-11-09 09:36:38,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 396 transitions, 9002 flow, removed 170 selfloop flow, removed 23 redundant places. [2021-11-09 09:36:38,800 INFO L242 Difference]: Finished difference. Result has 368 places, 362 transitions, 7631 flow [2021-11-09 09:36:38,801 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=6415, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=238, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=7631, PETRI_PLACES=368, PETRI_TRANSITIONS=362} [2021-11-09 09:36:38,801 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 302 predicate places. [2021-11-09 09:36:38,801 INFO L470 AbstractCegarLoop]: Abstraction has has 368 places, 362 transitions, 7631 flow [2021-11-09 09:36:38,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 54.111111111111114) internal successors, (974), 18 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:36:38,802 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:36:38,802 INFO L254 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:36:38,837 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-09 09:36:39,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-09 09:36:39,015 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:36:39,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:36:39,015 INFO L85 PathProgramCache]: Analyzing trace with hash 1081586959, now seen corresponding path program 20 times [2021-11-09 09:36:39,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:36:39,016 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597104597] [2021-11-09 09:36:39,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:36:39,016 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:36:39,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:39,238 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:36:39,239 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:36:39,239 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597104597] [2021-11-09 09:36:39,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597104597] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:36:39,239 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002291076] [2021-11-09 09:36:39,239 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:36:39,240 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:36:39,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:36:39,243 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:36:39,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-09 09:36:39,885 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:36:39,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:36:39,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-09 09:36:39,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:36:40,345 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:36:40,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002291076] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:36:40,345 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:36:40,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2021-11-09 09:36:40,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791091907] [2021-11-09 09:36:40,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-09 09:36:40,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:36:40,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-09 09:36:40,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-11-09 09:36:40,348 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-09 09:36:40,349 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 362 transitions, 7631 flow. Second operand has 17 states, 17 states have (on average 54.05882352941177) internal successors, (919), 17 states have internal predecessors, (919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:36:40,349 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:36:40,350 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-09 09:36:40,350 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:36:41,283 INFO L129 PetriNetUnfolder]: 280/2018 cut-off events. [2021-11-09 09:36:41,283 INFO L130 PetriNetUnfolder]: For 83832/84100 co-relation queries the response was YES. [2021-11-09 09:36:41,304 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10967 conditions, 2018 events. 280/2018 cut-off events. For 83832/84100 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 17231 event pairs, 0 based on Foata normal form. 45/1845 useless extension candidates. Maximal degree in co-relation 10805. Up to 422 conditions per place. [2021-11-09 09:36:41,322 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 287 selfloop transitions, 55 changer transitions 8/394 dead transitions. [2021-11-09 09:36:41,322 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 394 transitions, 9643 flow [2021-11-09 09:36:41,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-09 09:36:41,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-11-09 09:36:41,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1166 transitions. [2021-11-09 09:36:41,325 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8412698412698413 [2021-11-09 09:36:41,326 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1166 transitions. [2021-11-09 09:36:41,326 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1166 transitions. [2021-11-09 09:36:41,326 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:36:41,327 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1166 transitions. [2021-11-09 09:36:41,329 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 55.523809523809526) internal successors, (1166), 21 states have internal predecessors, (1166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:36:41,331 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) [2021-11-09 09:36:41,332 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) [2021-11-09 09:36:41,332 INFO L186 Difference]: Start difference. First operand has 368 places, 362 transitions, 7631 flow. Second operand 21 states and 1166 transitions. [2021-11-09 09:36:41,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 394 transitions, 9643 flow [2021-11-09 09:36:41,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 394 transitions, 8926 flow, removed 209 selfloop flow, removed 25 redundant places. [2021-11-09 09:36:41,620 INFO L242 Difference]: Finished difference. Result has 363 places, 364 transitions, 7207 flow [2021-11-09 09:36:41,621 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=6966, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=7207, PETRI_PLACES=363, PETRI_TRANSITIONS=364} [2021-11-09 09:36:41,621 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 297 predicate places. [2021-11-09 09:36:41,621 INFO L470 AbstractCegarLoop]: Abstraction has has 363 places, 364 transitions, 7207 flow [2021-11-09 09:36:41,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 54.05882352941177) internal successors, (919), 17 states have internal predecessors, (919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:36:41,622 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:36:41,622 INFO L254 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:36:41,646 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-09 09:36:41,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-09 09:36:41,823 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:36:41,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:36:41,823 INFO L85 PathProgramCache]: Analyzing trace with hash 2035871063, now seen corresponding path program 21 times [2021-11-09 09:36:41,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:36:41,824 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821977591] [2021-11-09 09:36:41,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:36:41,824 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:36:41,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:42,046 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:36:42,046 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:36:42,047 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821977591] [2021-11-09 09:36:42,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821977591] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:36:42,047 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126025617] [2021-11-09 09:36:42,047 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:36:42,047 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:36:42,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:36:42,048 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:36:42,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-09 09:36:42,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-11-09 09:36:42,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:36:42,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-09 09:36:42,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:36:43,166 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:36:43,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126025617] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:36:43,167 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:36:43,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-11-09 09:36:43,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073991600] [2021-11-09 09:36:43,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-09 09:36:43,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:36:43,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-09 09:36:43,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-11-09 09:36:43,170 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-09 09:36:43,171 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 364 transitions, 7207 flow. Second operand has 18 states, 18 states have (on average 54.111111111111114) internal successors, (974), 18 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:36:43,171 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:36:43,171 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-09 09:36:43,171 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:36:44,139 INFO L129 PetriNetUnfolder]: 282/2057 cut-off events. [2021-11-09 09:36:44,139 INFO L130 PetriNetUnfolder]: For 85429/85656 co-relation queries the response was YES. [2021-11-09 09:36:44,160 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10940 conditions, 2057 events. 282/2057 cut-off events. For 85429/85656 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 17598 event pairs, 0 based on Foata normal form. 55/1890 useless extension candidates. Maximal degree in co-relation 10776. Up to 342 conditions per place. [2021-11-09 09:36:44,172 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 244 selfloop transitions, 101 changer transitions 8/397 dead transitions. [2021-11-09 09:36:44,172 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 397 transitions, 9323 flow [2021-11-09 09:36:44,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-09 09:36:44,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-11-09 09:36:44,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1386 transitions. [2021-11-09 09:36:44,174 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.84 [2021-11-09 09:36:44,174 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1386 transitions. [2021-11-09 09:36:44,175 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1386 transitions. [2021-11-09 09:36:44,175 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:36:44,175 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1386 transitions. [2021-11-09 09:36:44,179 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 55.44) internal successors, (1386), 25 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) [2021-11-09 09:36:44,181 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 66.0) internal successors, (1716), 26 states have internal predecessors, (1716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:36:44,182 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 66.0) internal successors, (1716), 26 states have internal predecessors, (1716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:36:44,182 INFO L186 Difference]: Start difference. First operand has 363 places, 364 transitions, 7207 flow. Second operand 25 states and 1386 transitions. [2021-11-09 09:36:44,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 397 transitions, 9323 flow [2021-11-09 09:36:44,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 397 transitions, 9016 flow, removed 103 selfloop flow, removed 20 redundant places. [2021-11-09 09:36:44,462 INFO L242 Difference]: Finished difference. Result has 369 places, 366 transitions, 7350 flow [2021-11-09 09:36:44,462 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=7010, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=7350, PETRI_PLACES=369, PETRI_TRANSITIONS=366} [2021-11-09 09:36:44,463 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 303 predicate places. [2021-11-09 09:36:44,463 INFO L470 AbstractCegarLoop]: Abstraction has has 369 places, 366 transitions, 7350 flow [2021-11-09 09:36:44,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 54.111111111111114) internal successors, (974), 18 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:36:44,463 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:36:44,463 INFO L254 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:36:44,488 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-09 09:36:44,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:36:44,664 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:36:44,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:36:44,664 INFO L85 PathProgramCache]: Analyzing trace with hash 958080887, now seen corresponding path program 22 times [2021-11-09 09:36:44,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:36:44,665 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039949683] [2021-11-09 09:36:44,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:36:44,665 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:36:44,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:44,889 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:36:44,889 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:36:44,890 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039949683] [2021-11-09 09:36:44,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039949683] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:36:44,890 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191520606] [2021-11-09 09:36:44,890 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 09:36:44,890 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:36:44,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:36:44,892 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:36:44,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-09 09:36:45,663 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 09:36:45,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:36:45,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-09 09:36:45,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:36:46,048 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:36:46,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191520606] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:36:46,048 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:36:46,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2021-11-09 09:36:46,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415289249] [2021-11-09 09:36:46,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-09 09:36:46,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:36:46,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-09 09:36:46,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-11-09 09:36:46,051 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-09 09:36:46,052 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 366 transitions, 7350 flow. Second operand has 17 states, 17 states have (on average 54.05882352941177) internal successors, (919), 17 states have internal predecessors, (919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:36:46,052 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:36:46,052 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-09 09:36:46,052 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:36:47,000 INFO L129 PetriNetUnfolder]: 300/2198 cut-off events. [2021-11-09 09:36:47,000 INFO L130 PetriNetUnfolder]: For 87850/88111 co-relation queries the response was YES. [2021-11-09 09:36:47,031 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11642 conditions, 2198 events. 300/2198 cut-off events. For 87850/88111 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 19241 event pairs, 0 based on Foata normal form. 78/2040 useless extension candidates. Maximal degree in co-relation 11478. Up to 354 conditions per place. [2021-11-09 09:36:47,044 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 160 selfloop transitions, 200 changer transitions 8/412 dead transitions. [2021-11-09 09:36:47,044 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 412 transitions, 9896 flow [2021-11-09 09:36:47,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-09 09:36:47,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-11-09 09:36:47,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1443 transitions. [2021-11-09 09:36:47,045 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8409090909090909 [2021-11-09 09:36:47,045 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1443 transitions. [2021-11-09 09:36:47,046 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1443 transitions. [2021-11-09 09:36:47,046 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:36:47,046 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1443 transitions. [2021-11-09 09:36:47,048 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 55.5) internal successors, (1443), 26 states have internal predecessors, (1443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:36:47,050 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) [2021-11-09 09:36:47,050 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) [2021-11-09 09:36:47,050 INFO L186 Difference]: Start difference. First operand has 369 places, 366 transitions, 7350 flow. Second operand 26 states and 1443 transitions. [2021-11-09 09:36:47,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 412 transitions, 9896 flow [2021-11-09 09:36:47,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 412 transitions, 9534 flow, removed 89 selfloop flow, removed 22 redundant places. [2021-11-09 09:36:47,444 INFO L242 Difference]: Finished difference. Result has 380 places, 386 transitions, 8256 flow [2021-11-09 09:36:47,445 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=7080, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=180, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=8256, PETRI_PLACES=380, PETRI_TRANSITIONS=386} [2021-11-09 09:36:47,445 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 314 predicate places. [2021-11-09 09:36:47,445 INFO L470 AbstractCegarLoop]: Abstraction has has 380 places, 386 transitions, 8256 flow [2021-11-09 09:36:47,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 54.05882352941177) internal successors, (919), 17 states have internal predecessors, (919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:36:47,446 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:36:47,446 INFO L254 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:36:47,485 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-09 09:36:47,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-09 09:36:47,659 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:36:47,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:36:47,660 INFO L85 PathProgramCache]: Analyzing trace with hash -713071319, now seen corresponding path program 23 times [2021-11-09 09:36:47,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:36:47,660 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80840841] [2021-11-09 09:36:47,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:36:47,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:36:47,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:47,906 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:36:47,906 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:36:47,906 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80840841] [2021-11-09 09:36:47,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80840841] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:36:47,907 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478703497] [2021-11-09 09:36:47,907 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 09:36:47,907 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:36:47,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:36:47,911 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:36:47,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-09 09:36:48,925 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-11-09 09:36:48,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:36:48,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-09 09:36:48,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:36:49,342 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 4 proven. 116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:36:49,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478703497] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:36:49,342 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:36:49,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-11-09 09:36:49,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246479729] [2021-11-09 09:36:49,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-09 09:36:49,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:36:49,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-09 09:36:49,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-11-09 09:36:49,345 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-09 09:36:49,345 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 386 transitions, 8256 flow. Second operand has 18 states, 18 states have (on average 54.111111111111114) internal successors, (974), 18 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:36:49,346 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:36:49,346 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-09 09:36:49,346 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:36:50,439 INFO L129 PetriNetUnfolder]: 309/2279 cut-off events. [2021-11-09 09:36:50,439 INFO L130 PetriNetUnfolder]: For 92517/92766 co-relation queries the response was YES. [2021-11-09 09:36:50,471 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12278 conditions, 2279 events. 309/2279 cut-off events. For 92517/92766 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 20228 event pairs, 0 based on Foata normal form. 91/2126 useless extension candidates. Maximal degree in co-relation 12106. Up to 370 conditions per place. [2021-11-09 09:36:50,484 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 143 selfloop transitions, 228 changer transitions 8/423 dead transitions. [2021-11-09 09:36:50,485 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 423 transitions, 10663 flow [2021-11-09 09:36:50,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-09 09:36:50,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-11-09 09:36:50,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1610 transitions. [2021-11-09 09:36:50,486 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8411703239289446 [2021-11-09 09:36:50,486 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1610 transitions. [2021-11-09 09:36:50,486 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1610 transitions. [2021-11-09 09:36:50,487 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:36:50,487 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1610 transitions. [2021-11-09 09:36:50,623 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 55.51724137931034) internal successors, (1610), 29 states have internal predecessors, (1610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:36:50,625 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) [2021-11-09 09:36:50,626 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) [2021-11-09 09:36:50,626 INFO L186 Difference]: Start difference. First operand has 380 places, 386 transitions, 8256 flow. Second operand 29 states and 1610 transitions. [2021-11-09 09:36:50,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 423 transitions, 10663 flow [2021-11-09 09:36:50,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 423 transitions, 10303 flow, removed 103 selfloop flow, removed 16 redundant places. [2021-11-09 09:36:50,999 INFO L242 Difference]: Finished difference. Result has 399 places, 396 transitions, 8977 flow [2021-11-09 09:36:51,000 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=7996, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=218, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=8977, PETRI_PLACES=399, PETRI_TRANSITIONS=396} [2021-11-09 09:36:51,000 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 333 predicate places. [2021-11-09 09:36:51,000 INFO L470 AbstractCegarLoop]: Abstraction has has 399 places, 396 transitions, 8977 flow [2021-11-09 09:36:51,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 54.111111111111114) internal successors, (974), 18 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:36:51,001 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:36:51,001 INFO L254 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:36:51,025 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-09 09:36:51,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:36:51,204 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:36:51,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:36:51,205 INFO L85 PathProgramCache]: Analyzing trace with hash -121671927, now seen corresponding path program 24 times [2021-11-09 09:36:51,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:36:51,205 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696008437] [2021-11-09 09:36:51,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:36:51,205 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:36:51,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:51,379 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:36:51,380 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:36:51,381 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696008437] [2021-11-09 09:36:51,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696008437] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:36:51,382 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894074773] [2021-11-09 09:36:51,382 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 09:36:51,382 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:36:51,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:36:51,383 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:36:51,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-09 09:36:52,318 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-11-09 09:36:52,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:36:52,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-09 09:36:52,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:36:52,637 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:36:52,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894074773] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:36:52,637 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:36:52,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2021-11-09 09:36:52,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437672198] [2021-11-09 09:36:52,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-09 09:36:52,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:36:52,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-09 09:36:52,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-11-09 09:36:52,640 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-09 09:36:52,641 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 396 transitions, 8977 flow. Second operand has 17 states, 17 states have (on average 54.05882352941177) internal successors, (919), 17 states have internal predecessors, (919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:36:52,641 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:36:52,641 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-09 09:36:52,641 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:36:53,881 INFO L129 PetriNetUnfolder]: 326/2358 cut-off events. [2021-11-09 09:36:53,881 INFO L130 PetriNetUnfolder]: For 105962/106230 co-relation queries the response was YES. [2021-11-09 09:36:53,907 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13393 conditions, 2358 events. 326/2358 cut-off events. For 105962/106230 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 20829 event pairs, 0 based on Foata normal form. 109/2219 useless extension candidates. Maximal degree in co-relation 13214. Up to 392 conditions per place. [2021-11-09 09:36:53,921 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 85 selfloop transitions, 301 changer transitions 8/438 dead transitions. [2021-11-09 09:36:53,921 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 438 transitions, 11820 flow [2021-11-09 09:36:53,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-09 09:36:53,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-11-09 09:36:53,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1783 transitions. [2021-11-09 09:36:53,923 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8442234848484849 [2021-11-09 09:36:53,923 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1783 transitions. [2021-11-09 09:36:53,923 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1783 transitions. [2021-11-09 09:36:53,924 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:36:53,924 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1783 transitions. [2021-11-09 09:36:53,927 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 55.71875) internal successors, (1783), 32 states have internal predecessors, (1783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:36:53,930 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 66.0) internal successors, (2178), 33 states have internal predecessors, (2178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:36:53,930 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 66.0) internal successors, (2178), 33 states have internal predecessors, (2178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:36:53,930 INFO L186 Difference]: Start difference. First operand has 399 places, 396 transitions, 8977 flow. Second operand 32 states and 1783 transitions. [2021-11-09 09:36:53,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 438 transitions, 11820 flow [2021-11-09 09:36:54,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 438 transitions, 11299 flow, removed 133 selfloop flow, removed 21 redundant places. [2021-11-09 09:36:54,273 INFO L242 Difference]: Finished difference. Result has 413 places, 404 transitions, 9592 flow [2021-11-09 09:36:54,273 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=8562, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=293, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=9592, PETRI_PLACES=413, PETRI_TRANSITIONS=404} [2021-11-09 09:36:54,274 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 347 predicate places. [2021-11-09 09:36:54,274 INFO L470 AbstractCegarLoop]: Abstraction has has 413 places, 404 transitions, 9592 flow [2021-11-09 09:36:54,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 54.05882352941177) internal successors, (919), 17 states have internal predecessors, (919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:36:54,274 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:36:54,274 INFO L254 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:36:54,298 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-09 09:36:54,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:36:54,479 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:36:54,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:36:54,480 INFO L85 PathProgramCache]: Analyzing trace with hash -147754421, now seen corresponding path program 25 times [2021-11-09 09:36:54,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:36:54,480 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966781222] [2021-11-09 09:36:54,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:36:54,480 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:36:54,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:54,636 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:36:54,636 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:36:54,637 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966781222] [2021-11-09 09:36:54,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966781222] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:36:54,637 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467434772] [2021-11-09 09:36:54,637 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 09:36:54,637 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:36:54,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:36:54,638 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:36:54,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-09 09:36:55,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:55,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-09 09:36:55,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:36:55,971 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:36:55,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467434772] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:36:55,971 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:36:55,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-11-09 09:36:55,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335475041] [2021-11-09 09:36:55,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-09 09:36:55,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:36:55,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-09 09:36:55,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-11-09 09:36:55,974 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-09 09:36:55,976 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 404 transitions, 9592 flow. Second operand has 18 states, 18 states have (on average 54.111111111111114) internal successors, (974), 18 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:36:55,976 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:36:55,976 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-09 09:36:55,976 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:36:57,304 INFO L129 PetriNetUnfolder]: 321/2357 cut-off events. [2021-11-09 09:36:57,304 INFO L130 PetriNetUnfolder]: For 119564/119897 co-relation queries the response was YES. [2021-11-09 09:36:57,338 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13846 conditions, 2357 events. 321/2357 cut-off events. For 119564/119897 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 20974 event pairs, 0 based on Foata normal form. 122/2230 useless extension candidates. Maximal degree in co-relation 13663. Up to 386 conditions per place. [2021-11-09 09:36:57,442 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 76 selfloop transitions, 310 changer transitions 11/441 dead transitions. [2021-11-09 09:36:57,443 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 441 transitions, 12466 flow [2021-11-09 09:36:57,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-09 09:36:57,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-11-09 09:36:57,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1891 transitions. [2021-11-09 09:36:57,453 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8426916221033868 [2021-11-09 09:36:57,453 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1891 transitions. [2021-11-09 09:36:57,453 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1891 transitions. [2021-11-09 09:36:57,454 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:36:57,454 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1891 transitions. [2021-11-09 09:36:57,456 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 55.61764705882353) internal successors, (1891), 34 states have internal predecessors, (1891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:36:57,459 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 66.0) internal successors, (2310), 35 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:36:57,459 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 66.0) internal successors, (2310), 35 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:36:57,460 INFO L186 Difference]: Start difference. First operand has 413 places, 404 transitions, 9592 flow. Second operand 34 states and 1891 transitions. [2021-11-09 09:36:57,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 441 transitions, 12466 flow [2021-11-09 09:36:57,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 441 transitions, 11491 flow, removed 225 selfloop flow, removed 27 redundant places. [2021-11-09 09:36:57,804 INFO L242 Difference]: Finished difference. Result has 422 places, 407 transitions, 9670 flow [2021-11-09 09:36:57,805 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=8837, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=307, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=9670, PETRI_PLACES=422, PETRI_TRANSITIONS=407} [2021-11-09 09:36:57,805 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 356 predicate places. [2021-11-09 09:36:57,806 INFO L470 AbstractCegarLoop]: Abstraction has has 422 places, 407 transitions, 9670 flow [2021-11-09 09:36:57,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 54.111111111111114) internal successors, (974), 18 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:36:57,806 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:36:57,806 INFO L254 CegarLoopForPetriNet]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:36:57,832 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-09 09:36:58,014 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:36:58,014 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:36:58,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:36:58,015 INFO L85 PathProgramCache]: Analyzing trace with hash -1944490948, now seen corresponding path program 26 times [2021-11-09 09:36:58,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:36:58,015 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259888982] [2021-11-09 09:36:58,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:36:58,015 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:36:58,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:58,230 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:36:58,230 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:36:58,230 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259888982] [2021-11-09 09:36:58,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259888982] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:36:58,230 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042987505] [2021-11-09 09:36:58,230 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:36:58,231 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:36:58,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:36:58,232 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:36:58,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-09 09:36:59,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:36:59,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:36:59,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-09 09:36:59,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:36:59,739 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:36:59,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042987505] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:36:59,740 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:36:59,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-11-09 09:36:59,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546247604] [2021-11-09 09:36:59,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-09 09:36:59,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:36:59,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-09 09:36:59,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-11-09 09:36:59,743 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-09 09:36:59,744 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 422 places, 407 transitions, 9670 flow. Second operand has 18 states, 18 states have (on average 54.05555555555556) internal successors, (973), 18 states have internal predecessors, (973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:36:59,744 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:36:59,745 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-09 09:36:59,745 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:37:00,847 INFO L129 PetriNetUnfolder]: 321/2357 cut-off events. [2021-11-09 09:37:00,847 INFO L130 PetriNetUnfolder]: For 111186/111458 co-relation queries the response was YES. [2021-11-09 09:37:00,872 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13651 conditions, 2357 events. 321/2357 cut-off events. For 111186/111458 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 20914 event pairs, 0 based on Foata normal form. 50/2154 useless extension candidates. Maximal degree in co-relation 13465. Up to 545 conditions per place. [2021-11-09 09:37:00,885 INFO L132 encePairwiseOnDemand]: 60/66 looper letters, 353 selfloop transitions, 31 changer transitions 8/436 dead transitions. [2021-11-09 09:37:00,885 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 436 transitions, 11785 flow [2021-11-09 09:37:00,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-09 09:37:00,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-11-09 09:37:00,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1165 transitions. [2021-11-09 09:37:00,887 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8405483405483406 [2021-11-09 09:37:00,887 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1165 transitions. [2021-11-09 09:37:00,887 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1165 transitions. [2021-11-09 09:37:00,887 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:37:00,887 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1165 transitions. [2021-11-09 09:37:00,889 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 55.476190476190474) internal successors, (1165), 21 states have internal predecessors, (1165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:37:00,890 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) [2021-11-09 09:37:00,891 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) [2021-11-09 09:37:00,891 INFO L186 Difference]: Start difference. First operand has 422 places, 407 transitions, 9670 flow. Second operand 21 states and 1165 transitions. [2021-11-09 09:37:00,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 436 transitions, 11785 flow [2021-11-09 09:37:01,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 436 transitions, 11128 flow, removed 71 selfloop flow, removed 30 redundant places. [2021-11-09 09:37:01,310 INFO L242 Difference]: Finished difference. Result has 414 places, 409 transitions, 9229 flow [2021-11-09 09:37:01,311 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=9027, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=9229, PETRI_PLACES=414, PETRI_TRANSITIONS=409} [2021-11-09 09:37:01,311 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 348 predicate places. [2021-11-09 09:37:01,311 INFO L470 AbstractCegarLoop]: Abstraction has has 414 places, 409 transitions, 9229 flow [2021-11-09 09:37:01,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 54.05555555555556) internal successors, (973), 18 states have internal predecessors, (973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:37:01,312 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:37:01,312 INFO L254 CegarLoopForPetriNet]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:37:01,335 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-09 09:37:01,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-11-09 09:37:01,515 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:37:01,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:37:01,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1365751672, now seen corresponding path program 27 times [2021-11-09 09:37:01,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:37:01,516 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492041747] [2021-11-09 09:37:01,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:37:01,517 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:37:01,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:01,742 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:37:01,742 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:37:01,742 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492041747] [2021-11-09 09:37:01,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492041747] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:37:01,742 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012480572] [2021-11-09 09:37:01,742 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:37:01,743 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:37:01,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:37:01,743 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:37:01,745 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-09 09:37:02,680 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-09 09:37:02,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:37:02,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-09 09:37:02,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:37:03,126 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:37:03,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012480572] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:37:03,127 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:37:03,127 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-11-09 09:37:03,127 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930845875] [2021-11-09 09:37:03,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-09 09:37:03,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:37:03,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-09 09:37:03,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-11-09 09:37:03,130 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-09 09:37:03,131 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 409 transitions, 9229 flow. Second operand has 18 states, 18 states have (on average 54.05555555555556) internal successors, (973), 18 states have internal predecessors, (973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:37:03,131 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:37:03,132 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-09 09:37:03,132 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:37:04,143 INFO L129 PetriNetUnfolder]: 323/2389 cut-off events. [2021-11-09 09:37:04,143 INFO L130 PetriNetUnfolder]: For 122722/122989 co-relation queries the response was YES. [2021-11-09 09:37:04,171 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13842 conditions, 2389 events. 323/2389 cut-off events. For 122722/122989 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 21162 event pairs, 0 based on Foata normal form. 58/2191 useless extension candidates. Maximal degree in co-relation 13655. Up to 457 conditions per place. [2021-11-09 09:37:04,185 INFO L132 encePairwiseOnDemand]: 60/66 looper letters, 305 selfloop transitions, 82 changer transitions 8/439 dead transitions. [2021-11-09 09:37:04,185 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 439 transitions, 11485 flow [2021-11-09 09:37:04,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-09 09:37:04,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-11-09 09:37:04,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1388 transitions. [2021-11-09 09:37:04,189 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8412121212121212 [2021-11-09 09:37:04,189 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1388 transitions. [2021-11-09 09:37:04,189 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1388 transitions. [2021-11-09 09:37:04,190 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:37:04,190 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1388 transitions. [2021-11-09 09:37:04,191 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 55.52) internal successors, (1388), 25 states have internal predecessors, (1388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:37:04,192 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 66.0) internal successors, (1716), 26 states have internal predecessors, (1716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:37:04,192 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 66.0) internal successors, (1716), 26 states have internal predecessors, (1716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:37:04,193 INFO L186 Difference]: Start difference. First operand has 414 places, 409 transitions, 9229 flow. Second operand 25 states and 1388 transitions. [2021-11-09 09:37:04,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 439 transitions, 11485 flow [2021-11-09 09:37:04,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 439 transitions, 11211 flow, removed 108 selfloop flow, removed 18 redundant places. [2021-11-09 09:37:04,579 INFO L242 Difference]: Finished difference. Result has 422 places, 411 transitions, 9364 flow [2021-11-09 09:37:04,579 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=9057, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=409, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=9364, PETRI_PLACES=422, PETRI_TRANSITIONS=411} [2021-11-09 09:37:04,579 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 356 predicate places. [2021-11-09 09:37:04,579 INFO L470 AbstractCegarLoop]: Abstraction has has 422 places, 411 transitions, 9364 flow [2021-11-09 09:37:04,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 54.05555555555556) internal successors, (973), 18 states have internal predecessors, (973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:37:04,580 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:37:04,580 INFO L254 CegarLoopForPetriNet]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:37:04,603 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-11-09 09:37:04,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:37:04,780 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:37:04,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:37:04,781 INFO L85 PathProgramCache]: Analyzing trace with hash -1755787082, now seen corresponding path program 28 times [2021-11-09 09:37:04,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:37:04,781 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160649596] [2021-11-09 09:37:04,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:37:04,781 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:37:04,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:05,004 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:37:05,004 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:37:05,005 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160649596] [2021-11-09 09:37:05,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160649596] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:37:05,005 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434099556] [2021-11-09 09:37:05,005 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 09:37:05,005 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:37:05,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:37:05,006 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:37:05,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-09 09:37:05,998 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 09:37:05,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:37:05,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-09 09:37:06,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:37:06,405 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:37:06,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434099556] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:37:06,406 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:37:06,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-11-09 09:37:06,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539100281] [2021-11-09 09:37:06,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-09 09:37:06,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:37:06,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-09 09:37:06,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-11-09 09:37:06,409 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-09 09:37:06,410 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 422 places, 411 transitions, 9364 flow. Second operand has 19 states, 19 states have (on average 54.10526315789474) internal successors, (1028), 19 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:37:06,410 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:37:06,410 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-09 09:37:06,410 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:37:07,699 INFO L129 PetriNetUnfolder]: 357/2695 cut-off events. [2021-11-09 09:37:07,699 INFO L130 PetriNetUnfolder]: For 136973/137235 co-relation queries the response was YES. [2021-11-09 09:37:07,731 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15582 conditions, 2695 events. 357/2695 cut-off events. For 136973/137235 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 24863 event pairs, 0 based on Foata normal form. 58/2464 useless extension candidates. Maximal degree in co-relation 15393. Up to 443 conditions per place. [2021-11-09 09:37:07,745 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 305 selfloop transitions, 124 changer transitions 8/481 dead transitions. [2021-11-09 09:37:07,745 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 481 transitions, 13041 flow [2021-11-09 09:37:07,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-09 09:37:07,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-11-09 09:37:07,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1497 transitions. [2021-11-09 09:37:07,747 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8400673400673401 [2021-11-09 09:37:07,747 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1497 transitions. [2021-11-09 09:37:07,747 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1497 transitions. [2021-11-09 09:37:07,748 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:37:07,748 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1497 transitions. [2021-11-09 09:37:07,749 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 55.44444444444444) internal successors, (1497), 27 states have internal predecessors, (1497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:37:07,751 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 66.0) internal successors, (1848), 28 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:37:07,751 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 66.0) internal successors, (1848), 28 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:37:07,751 INFO L186 Difference]: Start difference. First operand has 422 places, 411 transitions, 9364 flow. Second operand 27 states and 1497 transitions. [2021-11-09 09:37:07,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 481 transitions, 13041 flow [2021-11-09 09:37:08,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 481 transitions, 12692 flow, removed 97 selfloop flow, removed 22 redundant places. [2021-11-09 09:37:08,363 INFO L242 Difference]: Finished difference. Result has 437 places, 446 transitions, 10942 flow [2021-11-09 09:37:08,364 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=9107, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=411, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=10942, PETRI_PLACES=437, PETRI_TRANSITIONS=446} [2021-11-09 09:37:08,365 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 371 predicate places. [2021-11-09 09:37:08,365 INFO L470 AbstractCegarLoop]: Abstraction has has 437 places, 446 transitions, 10942 flow [2021-11-09 09:37:08,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 54.10526315789474) internal successors, (1028), 19 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:37:08,365 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:37:08,366 INFO L254 CegarLoopForPetriNet]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:37:08,405 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-11-09 09:37:08,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:37:08,591 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:37:08,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:37:08,592 INFO L85 PathProgramCache]: Analyzing trace with hash 1641059862, now seen corresponding path program 29 times [2021-11-09 09:37:08,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:37:08,592 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877788109] [2021-11-09 09:37:08,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:37:08,592 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:37:08,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:08,843 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:37:08,843 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:37:08,844 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877788109] [2021-11-09 09:37:08,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877788109] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:37:08,844 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975862957] [2021-11-09 09:37:08,844 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 09:37:08,844 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:37:08,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:37:08,845 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:37:08,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-09 09:37:09,860 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-11-09 09:37:09,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:37:09,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-09 09:37:09,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:37:10,281 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 4 proven. 143 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:37:10,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975862957] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:37:10,281 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:37:10,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-11-09 09:37:10,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659505292] [2021-11-09 09:37:10,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-09 09:37:10,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:37:10,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-09 09:37:10,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-11-09 09:37:10,283 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-09 09:37:10,284 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 446 transitions, 10942 flow. Second operand has 19 states, 19 states have (on average 54.10526315789474) internal successors, (1028), 19 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:37:10,284 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:37:10,284 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-09 09:37:10,284 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:37:11,819 INFO L129 PetriNetUnfolder]: 359/2713 cut-off events. [2021-11-09 09:37:11,819 INFO L130 PetriNetUnfolder]: For 145223/145489 co-relation queries the response was YES. [2021-11-09 09:37:11,862 INFO L84 FinitePrefix]: Finished finitePrefix Result has 16002 conditions, 2713 events. 359/2713 cut-off events. For 145223/145489 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 25050 event pairs, 0 based on Foata normal form. 74/2496 useless extension candidates. Maximal degree in co-relation 15801. Up to 441 conditions per place. [2021-11-09 09:37:11,887 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 229 selfloop transitions, 200 changer transitions 8/481 dead transitions. [2021-11-09 09:37:11,888 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 462 places, 481 transitions, 13464 flow [2021-11-09 09:37:11,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-09 09:37:11,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-11-09 09:37:11,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1609 transitions. [2021-11-09 09:37:11,890 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8406478578892372 [2021-11-09 09:37:11,890 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1609 transitions. [2021-11-09 09:37:11,890 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1609 transitions. [2021-11-09 09:37:11,891 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:37:11,891 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1609 transitions. [2021-11-09 09:37:11,893 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 55.48275862068966) internal successors, (1609), 29 states have internal predecessors, (1609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:37:11,896 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) [2021-11-09 09:37:11,896 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) [2021-11-09 09:37:11,896 INFO L186 Difference]: Start difference. First operand has 437 places, 446 transitions, 10942 flow. Second operand 29 states and 1609 transitions. [2021-11-09 09:37:11,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 462 places, 481 transitions, 13464 flow [2021-11-09 09:37:12,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 447 places, 481 transitions, 13140 flow, removed 120 selfloop flow, removed 15 redundant places. [2021-11-09 09:37:12,529 INFO L242 Difference]: Finished difference. Result has 452 places, 448 transitions, 11249 flow [2021-11-09 09:37:12,530 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=10678, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=446, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=198, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=11249, PETRI_PLACES=452, PETRI_TRANSITIONS=448} [2021-11-09 09:37:12,530 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 386 predicate places. [2021-11-09 09:37:12,531 INFO L470 AbstractCegarLoop]: Abstraction has has 452 places, 448 transitions, 11249 flow [2021-11-09 09:37:12,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 54.10526315789474) internal successors, (1028), 19 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:37:12,531 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:37:12,531 INFO L254 CegarLoopForPetriNet]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:37:12,579 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-11-09 09:37:12,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-11-09 09:37:12,759 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:37:12,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:37:12,760 INFO L85 PathProgramCache]: Analyzing trace with hash 945590418, now seen corresponding path program 30 times [2021-11-09 09:37:12,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:37:12,760 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461443225] [2021-11-09 09:37:12,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:37:12,760 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:37:12,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:13,081 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:37:13,081 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:37:13,082 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461443225] [2021-11-09 09:37:13,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461443225] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:37:13,082 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681630617] [2021-11-09 09:37:13,082 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 09:37:13,082 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:37:13,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:37:13,083 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:37:13,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-09 09:37:14,274 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-11-09 09:37:14,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:37:14,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-09 09:37:14,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:37:14,617 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:37:14,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681630617] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:37:14,618 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:37:14,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-11-09 09:37:14,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290685158] [2021-11-09 09:37:14,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-09 09:37:14,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:37:14,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-09 09:37:14,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-11-09 09:37:14,620 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-09 09:37:14,621 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 452 places, 448 transitions, 11249 flow. Second operand has 18 states, 18 states have (on average 54.05555555555556) internal successors, (973), 18 states have internal predecessors, (973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:37:14,621 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:37:14,621 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-09 09:37:14,621 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:37:15,929 INFO L129 PetriNetUnfolder]: 361/2724 cut-off events. [2021-11-09 09:37:15,930 INFO L130 PetriNetUnfolder]: For 151727/152019 co-relation queries the response was YES. [2021-11-09 09:37:15,969 INFO L84 FinitePrefix]: Finished finitePrefix Result has 16358 conditions, 2724 events. 361/2724 cut-off events. For 151727/152019 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 25165 event pairs, 0 based on Foata normal form. 107/2539 useless extension candidates. Maximal degree in co-relation 16155. Up to 441 conditions per place. [2021-11-09 09:37:15,985 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 134 selfloop transitions, 292 changer transitions 8/478 dead transitions. [2021-11-09 09:37:15,985 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 480 places, 478 transitions, 13858 flow [2021-11-09 09:37:15,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-09 09:37:15,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-11-09 09:37:15,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1777 transitions. [2021-11-09 09:37:15,987 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8413825757575758 [2021-11-09 09:37:15,987 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1777 transitions. [2021-11-09 09:37:15,987 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1777 transitions. [2021-11-09 09:37:15,988 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:37:15,988 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1777 transitions. [2021-11-09 09:37:15,989 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 55.53125) internal successors, (1777), 32 states have internal predecessors, (1777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:37:15,991 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 66.0) internal successors, (2178), 33 states have internal predecessors, (2178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:37:15,992 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 66.0) internal successors, (2178), 33 states have internal predecessors, (2178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:37:15,992 INFO L186 Difference]: Start difference. First operand has 452 places, 448 transitions, 11249 flow. Second operand 32 states and 1777 transitions. [2021-11-09 09:37:15,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 480 places, 478 transitions, 13858 flow [2021-11-09 09:37:16,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 452 places, 478 transitions, 13265 flow, removed 128 selfloop flow, removed 28 redundant places. [2021-11-09 09:37:16,465 INFO L242 Difference]: Finished difference. Result has 457 places, 450 transitions, 11561 flow [2021-11-09 09:37:16,465 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=10790, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=290, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=11561, PETRI_PLACES=457, PETRI_TRANSITIONS=450} [2021-11-09 09:37:16,465 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 391 predicate places. [2021-11-09 09:37:16,466 INFO L470 AbstractCegarLoop]: Abstraction has has 457 places, 450 transitions, 11561 flow [2021-11-09 09:37:16,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 54.05555555555556) internal successors, (973), 18 states have internal predecessors, (973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:37:16,466 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:37:16,466 INFO L254 CegarLoopForPetriNet]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:37:16,490 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-11-09 09:37:16,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:37:16,667 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:37:16,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:37:16,667 INFO L85 PathProgramCache]: Analyzing trace with hash -2024931326, now seen corresponding path program 31 times [2021-11-09 09:37:16,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:37:16,667 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750358969] [2021-11-09 09:37:16,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:37:16,668 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:37:16,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:16,839 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:37:16,840 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:37:16,840 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750358969] [2021-11-09 09:37:16,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750358969] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:37:16,840 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688068200] [2021-11-09 09:37:16,840 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 09:37:16,840 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:37:16,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:37:16,841 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:37:16,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-09 09:37:17,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:17,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-09 09:37:17,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:37:18,391 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:37:18,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688068200] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:37:18,391 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:37:18,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-11-09 09:37:18,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351831806] [2021-11-09 09:37:18,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-09 09:37:18,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:37:18,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-09 09:37:18,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-11-09 09:37:18,394 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-09 09:37:18,396 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 457 places, 450 transitions, 11561 flow. Second operand has 19 states, 19 states have (on average 54.10526315789474) internal successors, (1028), 19 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:37:18,396 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:37:18,396 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-09 09:37:18,396 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:37:19,775 INFO L129 PetriNetUnfolder]: 366/2776 cut-off events. [2021-11-09 09:37:19,776 INFO L130 PetriNetUnfolder]: For 148644/148908 co-relation queries the response was YES. [2021-11-09 09:37:19,810 INFO L84 FinitePrefix]: Finished finitePrefix Result has 16595 conditions, 2776 events. 366/2776 cut-off events. For 148644/148908 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 25765 event pairs, 0 based on Foata normal form. 109/2588 useless extension candidates. Maximal degree in co-relation 16394. Up to 451 conditions per place. [2021-11-09 09:37:19,826 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 123 selfloop transitions, 310 changer transitions 8/485 dead transitions. [2021-11-09 09:37:19,826 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 486 places, 485 transitions, 14351 flow [2021-11-09 09:37:19,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-09 09:37:19,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-11-09 09:37:19,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1833 transitions. [2021-11-09 09:37:19,828 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8415977961432507 [2021-11-09 09:37:19,828 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1833 transitions. [2021-11-09 09:37:19,828 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1833 transitions. [2021-11-09 09:37:19,829 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:37:19,829 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1833 transitions. [2021-11-09 09:37:19,832 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 55.54545454545455) internal successors, (1833), 33 states have internal predecessors, (1833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:37:19,835 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) [2021-11-09 09:37:19,835 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) [2021-11-09 09:37:19,836 INFO L186 Difference]: Start difference. First operand has 457 places, 450 transitions, 11561 flow. Second operand 33 states and 1833 transitions. [2021-11-09 09:37:19,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 486 places, 485 transitions, 14351 flow [2021-11-09 09:37:20,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 485 transitions, 13570 flow, removed 112 selfloop flow, removed 31 redundant places. [2021-11-09 09:37:20,339 INFO L242 Difference]: Finished difference. Result has 463 places, 456 transitions, 11945 flow [2021-11-09 09:37:20,340 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=10888, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=304, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=11945, PETRI_PLACES=463, PETRI_TRANSITIONS=456} [2021-11-09 09:37:20,341 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 397 predicate places. [2021-11-09 09:37:20,341 INFO L470 AbstractCegarLoop]: Abstraction has has 463 places, 456 transitions, 11945 flow [2021-11-09 09:37:20,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 54.10526315789474) internal successors, (1028), 19 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:37:20,341 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:37:20,341 INFO L254 CegarLoopForPetriNet]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:37:20,382 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2021-11-09 09:37:20,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-11-09 09:37:20,555 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:37:20,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:37:20,555 INFO L85 PathProgramCache]: Analyzing trace with hash 1742956660, now seen corresponding path program 32 times [2021-11-09 09:37:20,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:37:20,556 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448022854] [2021-11-09 09:37:20,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:37:20,556 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:37:20,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:20,847 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:37:20,847 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:37:20,848 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448022854] [2021-11-09 09:37:20,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448022854] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:37:20,848 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424360174] [2021-11-09 09:37:20,848 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:37:20,848 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:37:20,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:37:20,859 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:37:20,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-09 09:37:21,997 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:37:21,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:37:21,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-09 09:37:22,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:37:22,301 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:37:22,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424360174] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:37:22,302 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:37:22,302 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-11-09 09:37:22,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544098459] [2021-11-09 09:37:22,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-09 09:37:22,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:37:22,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-09 09:37:22,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-11-09 09:37:22,303 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-09 09:37:22,304 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 463 places, 456 transitions, 11945 flow. Second operand has 18 states, 18 states have (on average 54.05555555555556) internal successors, (973), 18 states have internal predecessors, (973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:37:22,304 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:37:22,304 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-09 09:37:22,304 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:37:23,584 INFO L129 PetriNetUnfolder]: 374/2834 cut-off events. [2021-11-09 09:37:23,584 INFO L130 PetriNetUnfolder]: For 159940/160218 co-relation queries the response was YES. [2021-11-09 09:37:23,656 INFO L84 FinitePrefix]: Finished finitePrefix Result has 17236 conditions, 2834 events. 374/2834 cut-off events. For 159940/160218 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 26445 event pairs, 0 based on Foata normal form. 115/2646 useless extension candidates. Maximal degree in co-relation 17032. Up to 465 conditions per place. [2021-11-09 09:37:23,680 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 114 selfloop transitions, 330 changer transitions 8/496 dead transitions. [2021-11-09 09:37:23,680 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 493 places, 496 transitions, 14895 flow [2021-11-09 09:37:23,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-09 09:37:23,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-11-09 09:37:23,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1889 transitions. [2021-11-09 09:37:23,683 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8418003565062389 [2021-11-09 09:37:23,684 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1889 transitions. [2021-11-09 09:37:23,684 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1889 transitions. [2021-11-09 09:37:23,684 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:37:23,685 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1889 transitions. [2021-11-09 09:37:23,687 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 55.55882352941177) internal successors, (1889), 34 states have internal predecessors, (1889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:37:23,690 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 66.0) internal successors, (2310), 35 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:37:23,690 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 66.0) internal successors, (2310), 35 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:37:23,691 INFO L186 Difference]: Start difference. First operand has 463 places, 456 transitions, 11945 flow. Second operand 34 states and 1889 transitions. [2021-11-09 09:37:23,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 493 places, 496 transitions, 14895 flow [2021-11-09 09:37:24,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 466 places, 496 transitions, 14189 flow, removed 128 selfloop flow, removed 27 redundant places. [2021-11-09 09:37:24,382 INFO L242 Difference]: Finished difference. Result has 473 places, 467 transitions, 12445 flow [2021-11-09 09:37:24,382 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=11315, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=456, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=319, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=12445, PETRI_PLACES=473, PETRI_TRANSITIONS=467} [2021-11-09 09:37:24,383 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 407 predicate places. [2021-11-09 09:37:24,383 INFO L470 AbstractCegarLoop]: Abstraction has has 473 places, 467 transitions, 12445 flow [2021-11-09 09:37:24,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 54.05555555555556) internal successors, (973), 18 states have internal predecessors, (973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:37:24,383 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:37:24,383 INFO L254 CegarLoopForPetriNet]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:37:24,413 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-11-09 09:37:24,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-11-09 09:37:24,584 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:37:24,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:37:24,584 INFO L85 PathProgramCache]: Analyzing trace with hash 2091209574, now seen corresponding path program 33 times [2021-11-09 09:37:24,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:37:24,584 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413553652] [2021-11-09 09:37:24,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:37:24,585 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:37:24,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:24,769 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:37:24,769 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:37:24,771 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413553652] [2021-11-09 09:37:24,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413553652] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:37:24,771 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420019313] [2021-11-09 09:37:24,771 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:37:24,772 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:37:24,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:37:24,773 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:37:24,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-09 09:37:25,989 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-11-09 09:37:25,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:37:25,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-09 09:37:25,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:37:26,268 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:37:26,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420019313] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:37:26,269 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:37:26,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-11-09 09:37:26,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031028271] [2021-11-09 09:37:26,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-09 09:37:26,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:37:26,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-09 09:37:26,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-11-09 09:37:26,271 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-09 09:37:26,271 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 473 places, 467 transitions, 12445 flow. Second operand has 18 states, 18 states have (on average 54.05555555555556) internal successors, (973), 18 states have internal predecessors, (973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:37:26,272 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:37:26,272 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-09 09:37:26,272 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:37:27,876 INFO L129 PetriNetUnfolder]: 392/2914 cut-off events. [2021-11-09 09:37:27,876 INFO L130 PetriNetUnfolder]: For 178478/178853 co-relation queries the response was YES. [2021-11-09 09:37:27,924 INFO L84 FinitePrefix]: Finished finitePrefix Result has 18476 conditions, 2914 events. 392/2914 cut-off events. For 178478/178853 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 27096 event pairs, 0 based on Foata normal form. 131/2735 useless extension candidates. Maximal degree in co-relation 18268. Up to 487 conditions per place. [2021-11-09 09:37:27,944 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 103 selfloop transitions, 356 changer transitions 8/511 dead transitions. [2021-11-09 09:37:27,944 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 505 places, 511 transitions, 15813 flow [2021-11-09 09:37:27,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-09 09:37:27,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-11-09 09:37:27,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2005 transitions. [2021-11-09 09:37:27,946 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8438552188552189 [2021-11-09 09:37:27,946 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2005 transitions. [2021-11-09 09:37:27,946 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2005 transitions. [2021-11-09 09:37:27,946 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:37:27,947 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2005 transitions. [2021-11-09 09:37:27,949 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 55.69444444444444) internal successors, (2005), 36 states have internal predecessors, (2005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:37:27,950 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 66.0) internal successors, (2442), 37 states have internal predecessors, (2442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:37:27,950 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 66.0) internal successors, (2442), 37 states have internal predecessors, (2442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:37:27,950 INFO L186 Difference]: Start difference. First operand has 473 places, 467 transitions, 12445 flow. Second operand 36 states and 2005 transitions. [2021-11-09 09:37:27,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 505 places, 511 transitions, 15813 flow [2021-11-09 09:37:28,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 476 places, 511 transitions, 14946 flow, removed 168 selfloop flow, removed 29 redundant places. [2021-11-09 09:37:28,783 INFO L242 Difference]: Finished difference. Result has 485 places, 476 transitions, 13063 flow [2021-11-09 09:37:28,784 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=11744, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=347, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=13063, PETRI_PLACES=485, PETRI_TRANSITIONS=476} [2021-11-09 09:37:28,784 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 419 predicate places. [2021-11-09 09:37:28,784 INFO L470 AbstractCegarLoop]: Abstraction has has 485 places, 476 transitions, 13063 flow [2021-11-09 09:37:28,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 54.05555555555556) internal successors, (973), 18 states have internal predecessors, (973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:37:28,785 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:37:28,786 INFO L254 CegarLoopForPetriNet]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:37:28,827 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-11-09 09:37:28,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-11-09 09:37:28,999 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:37:28,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:37:28,999 INFO L85 PathProgramCache]: Analyzing trace with hash -321216590, now seen corresponding path program 34 times [2021-11-09 09:37:29,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:37:29,000 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191709803] [2021-11-09 09:37:29,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:37:29,000 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:37:29,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:29,159 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:37:29,159 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:37:29,159 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191709803] [2021-11-09 09:37:29,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191709803] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:37:29,159 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350797068] [2021-11-09 09:37:29,160 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 09:37:29,160 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:37:29,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:37:29,161 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:37:29,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-09 09:37:30,389 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 09:37:30,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:37:30,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-09 09:37:30,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:37:30,726 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:37:30,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350797068] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:37:30,726 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:37:30,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-11-09 09:37:30,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135168289] [2021-11-09 09:37:30,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-09 09:37:30,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:37:30,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-09 09:37:30,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-11-09 09:37:30,729 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-09 09:37:30,730 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 485 places, 476 transitions, 13063 flow. Second operand has 19 states, 19 states have (on average 54.10526315789474) internal successors, (1028), 19 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:37:30,730 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:37:30,730 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-09 09:37:30,730 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:37:32,480 INFO L129 PetriNetUnfolder]: 387/2892 cut-off events. [2021-11-09 09:37:32,480 INFO L130 PetriNetUnfolder]: For 186928/187298 co-relation queries the response was YES. [2021-11-09 09:37:32,525 INFO L84 FinitePrefix]: Finished finitePrefix Result has 18680 conditions, 2892 events. 387/2892 cut-off events. For 186928/187298 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 26887 event pairs, 0 based on Foata normal form. 136/2721 useless extension candidates. Maximal degree in co-relation 18466. Up to 481 conditions per place. [2021-11-09 09:37:32,548 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 99 selfloop transitions, 360 changer transitions 11/514 dead transitions. [2021-11-09 09:37:32,548 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 517 places, 514 transitions, 16383 flow [2021-11-09 09:37:32,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-09 09:37:32,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-11-09 09:37:32,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2002 transitions. [2021-11-09 09:37:32,551 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8425925925925926 [2021-11-09 09:37:32,552 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2002 transitions. [2021-11-09 09:37:32,552 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2002 transitions. [2021-11-09 09:37:32,553 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:37:32,553 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2002 transitions. [2021-11-09 09:37:32,557 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 55.611111111111114) internal successors, (2002), 36 states have internal predecessors, (2002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:37:32,560 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 66.0) internal successors, (2442), 37 states have internal predecessors, (2442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:37:32,561 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 66.0) internal successors, (2442), 37 states have internal predecessors, (2442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:37:32,561 INFO L186 Difference]: Start difference. First operand has 485 places, 476 transitions, 13063 flow. Second operand 36 states and 2002 transitions. [2021-11-09 09:37:32,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 517 places, 514 transitions, 16383 flow [2021-11-09 09:37:33,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 485 places, 514 transitions, 15256 flow, removed 246 selfloop flow, removed 32 redundant places. [2021-11-09 09:37:33,269 INFO L242 Difference]: Finished difference. Result has 491 places, 479 transitions, 13140 flow [2021-11-09 09:37:33,270 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=12172, PETRI_DIFFERENCE_MINUEND_PLACES=450, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=476, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=357, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=13140, PETRI_PLACES=491, PETRI_TRANSITIONS=479} [2021-11-09 09:37:33,270 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 425 predicate places. [2021-11-09 09:37:33,270 INFO L470 AbstractCegarLoop]: Abstraction has has 491 places, 479 transitions, 13140 flow [2021-11-09 09:37:33,270 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 54.10526315789474) internal successors, (1028), 19 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:37:33,270 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:37:33,271 INFO L254 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:37:33,298 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-11-09 09:37:33,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:37:33,471 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:37:33,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:37:33,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1557152428, now seen corresponding path program 35 times [2021-11-09 09:37:33,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:37:33,472 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605618264] [2021-11-09 09:37:33,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:37:33,472 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:37:33,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:33,721 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:37:33,722 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:37:33,722 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605618264] [2021-11-09 09:37:33,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605618264] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:37:33,722 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319742635] [2021-11-09 09:37:33,722 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 09:37:33,722 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:37:33,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:37:33,723 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:37:33,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-09 09:37:34,954 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-11-09 09:37:34,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:37:34,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-09 09:37:34,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:37:35,507 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:37:35,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319742635] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:37:35,508 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:37:35,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2021-11-09 09:37:35,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185773187] [2021-11-09 09:37:35,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-09 09:37:35,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:37:35,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-09 09:37:35,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-11-09 09:37:35,510 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-09 09:37:35,510 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 491 places, 479 transitions, 13140 flow. Second operand has 19 states, 19 states have (on average 54.05263157894737) internal successors, (1027), 19 states have internal predecessors, (1027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:37:35,510 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:37:35,510 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-09 09:37:35,510 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:37:36,743 INFO L129 PetriNetUnfolder]: 387/2899 cut-off events. [2021-11-09 09:37:36,743 INFO L130 PetriNetUnfolder]: For 179780/180089 co-relation queries the response was YES. [2021-11-09 09:37:36,783 INFO L84 FinitePrefix]: Finished finitePrefix Result has 18551 conditions, 2899 events. 387/2899 cut-off events. For 179780/180089 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 26936 event pairs, 0 based on Foata normal form. 51/2638 useless extension candidates. Maximal degree in co-relation 18336. Up to 589 conditions per place. [2021-11-09 09:37:36,801 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 386 selfloop transitions, 76 changer transitions 8/514 dead transitions. [2021-11-09 09:37:36,801 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 510 places, 514 transitions, 15839 flow [2021-11-09 09:37:36,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-09 09:37:36,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-11-09 09:37:36,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1276 transitions. [2021-11-09 09:37:36,803 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8405797101449275 [2021-11-09 09:37:36,803 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1276 transitions. [2021-11-09 09:37:36,803 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1276 transitions. [2021-11-09 09:37:36,803 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:37:36,803 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1276 transitions. [2021-11-09 09:37:36,805 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 55.47826086956522) internal successors, (1276), 23 states have internal predecessors, (1276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:37:36,805 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 66.0) internal successors, (1584), 24 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:37:36,806 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 66.0) internal successors, (1584), 24 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:37:36,806 INFO L186 Difference]: Start difference. First operand has 491 places, 479 transitions, 13140 flow. Second operand 23 states and 1276 transitions. [2021-11-09 09:37:36,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 510 places, 514 transitions, 15839 flow [2021-11-09 09:37:37,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 475 places, 514 transitions, 14921 flow, removed 81 selfloop flow, removed 35 redundant places. [2021-11-09 09:37:37,396 INFO L242 Difference]: Finished difference. Result has 480 places, 481 transitions, 12552 flow [2021-11-09 09:37:37,397 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=12238, PETRI_DIFFERENCE_MINUEND_PLACES=453, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=479, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=403, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=12552, PETRI_PLACES=480, PETRI_TRANSITIONS=481} [2021-11-09 09:37:37,397 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 414 predicate places. [2021-11-09 09:37:37,397 INFO L470 AbstractCegarLoop]: Abstraction has has 480 places, 481 transitions, 12552 flow [2021-11-09 09:37:37,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 54.05263157894737) internal successors, (1027), 19 states have internal predecessors, (1027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:37:37,397 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:37:37,397 INFO L254 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:37:37,424 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-11-09 09:37:37,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:37:37,598 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:37:37,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:37:37,599 INFO L85 PathProgramCache]: Analyzing trace with hash -1699599972, now seen corresponding path program 36 times [2021-11-09 09:37:37,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:37:37,599 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421637753] [2021-11-09 09:37:37,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:37:37,599 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:37:37,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:38,005 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:37:38,006 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:37:38,006 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421637753] [2021-11-09 09:37:38,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421637753] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:37:38,006 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391764076] [2021-11-09 09:37:38,006 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 09:37:38,006 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:37:38,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:37:38,010 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:37:38,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-11-09 09:37:39,703 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-11-09 09:37:39,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:37:39,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-09 09:37:39,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:37:40,127 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:37:40,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391764076] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:37:40,128 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:37:40,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2021-11-09 09:37:40,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344267505] [2021-11-09 09:37:40,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-09 09:37:40,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:37:40,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-09 09:37:40,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-11-09 09:37:40,131 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-09 09:37:40,132 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 480 places, 481 transitions, 12552 flow. Second operand has 19 states, 19 states have (on average 54.05263157894737) internal successors, (1027), 19 states have internal predecessors, (1027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:37:40,132 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:37:40,133 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-09 09:37:40,133 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:37:41,495 INFO L129 PetriNetUnfolder]: 391/2942 cut-off events. [2021-11-09 09:37:41,495 INFO L130 PetriNetUnfolder]: For 197104/197434 co-relation queries the response was YES. [2021-11-09 09:37:41,583 INFO L84 FinitePrefix]: Finished finitePrefix Result has 18878 conditions, 2942 events. 391/2942 cut-off events. For 197104/197434 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 27472 event pairs, 0 based on Foata normal form. 69/2696 useless extension candidates. Maximal degree in co-relation 18663. Up to 487 conditions per place. [2021-11-09 09:37:41,606 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 292 selfloop transitions, 172 changer transitions 8/516 dead transitions. [2021-11-09 09:37:41,607 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 502 places, 516 transitions, 15443 flow [2021-11-09 09:37:41,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-09 09:37:41,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-11-09 09:37:41,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1441 transitions. [2021-11-09 09:37:41,610 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8397435897435898 [2021-11-09 09:37:41,610 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1441 transitions. [2021-11-09 09:37:41,610 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1441 transitions. [2021-11-09 09:37:41,611 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:37:41,611 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1441 transitions. [2021-11-09 09:37:41,614 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 55.42307692307692) internal successors, (1441), 26 states have internal predecessors, (1441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:37:41,616 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) [2021-11-09 09:37:41,617 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) [2021-11-09 09:37:41,617 INFO L186 Difference]: Start difference. First operand has 480 places, 481 transitions, 12552 flow. Second operand 26 states and 1441 transitions. [2021-11-09 09:37:41,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 502 places, 516 transitions, 15443 flow [2021-11-09 09:37:42,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 483 places, 516 transitions, 15071 flow, removed 120 selfloop flow, removed 19 redundant places. [2021-11-09 09:37:42,390 INFO L242 Difference]: Finished difference. Result has 490 places, 485 transitions, 12899 flow [2021-11-09 09:37:42,391 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=12296, PETRI_DIFFERENCE_MINUEND_PLACES=458, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=481, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=12899, PETRI_PLACES=490, PETRI_TRANSITIONS=485} [2021-11-09 09:37:42,391 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 424 predicate places. [2021-11-09 09:37:42,391 INFO L470 AbstractCegarLoop]: Abstraction has has 490 places, 485 transitions, 12899 flow [2021-11-09 09:37:42,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 54.05263157894737) internal successors, (1027), 19 states have internal predecessors, (1027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:37:42,392 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:37:42,392 INFO L254 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:37:42,423 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-11-09 09:37:42,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-11-09 09:37:42,605 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:37:42,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:37:42,605 INFO L85 PathProgramCache]: Analyzing trace with hash 400501900, now seen corresponding path program 37 times [2021-11-09 09:37:42,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:37:42,606 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521788238] [2021-11-09 09:37:42,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:37:42,606 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:37:42,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:42,810 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:37:42,811 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:37:42,811 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521788238] [2021-11-09 09:37:42,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521788238] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:37:42,811 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483822381] [2021-11-09 09:37:42,811 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 09:37:42,812 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:37:42,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:37:42,813 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:37:42,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-11-09 09:37:44,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:44,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-09 09:37:44,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:37:44,755 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:37:44,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483822381] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:37:44,755 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:37:44,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2021-11-09 09:37:44,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815779627] [2021-11-09 09:37:44,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-09 09:37:44,756 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:37:44,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-09 09:37:44,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-11-09 09:37:44,757 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-09 09:37:44,758 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 490 places, 485 transitions, 12899 flow. Second operand has 19 states, 19 states have (on average 54.05263157894737) internal successors, (1027), 19 states have internal predecessors, (1027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:37:44,758 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:37:44,758 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-09 09:37:44,758 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:37:46,060 INFO L129 PetriNetUnfolder]: 395/2978 cut-off events. [2021-11-09 09:37:46,060 INFO L130 PetriNetUnfolder]: For 197926/198251 co-relation queries the response was YES. [2021-11-09 09:37:46,105 INFO L84 FinitePrefix]: Finished finitePrefix Result has 19171 conditions, 2978 events. 395/2978 cut-off events. For 197926/198251 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 27705 event pairs, 0 based on Foata normal form. 88/2747 useless extension candidates. Maximal degree in co-relation 18952. Up to 495 conditions per place. [2021-11-09 09:37:46,286 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 218 selfloop transitions, 248 changer transitions 8/518 dead transitions. [2021-11-09 09:37:46,287 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 514 places, 518 transitions, 15834 flow [2021-11-09 09:37:46,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-09 09:37:46,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-11-09 09:37:46,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1553 transitions. [2021-11-09 09:37:46,291 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8403679653679653 [2021-11-09 09:37:46,291 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1553 transitions. [2021-11-09 09:37:46,291 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1553 transitions. [2021-11-09 09:37:46,292 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:37:46,292 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1553 transitions. [2021-11-09 09:37:46,293 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 55.464285714285715) internal successors, (1553), 28 states have internal predecessors, (1553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:37:46,295 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 66.0) internal successors, (1914), 29 states have internal predecessors, (1914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:37:46,295 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 66.0) internal successors, (1914), 29 states have internal predecessors, (1914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:37:46,296 INFO L186 Difference]: Start difference. First operand has 490 places, 485 transitions, 12899 flow. Second operand 28 states and 1553 transitions. [2021-11-09 09:37:46,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 514 places, 518 transitions, 15834 flow [2021-11-09 09:37:46,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 493 places, 518 transitions, 15320 flow, removed 108 selfloop flow, removed 21 redundant places. [2021-11-09 09:37:46,905 INFO L242 Difference]: Finished difference. Result has 498 places, 489 transitions, 13238 flow [2021-11-09 09:37:46,906 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=12485, PETRI_DIFFERENCE_MINUEND_PLACES=466, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=485, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=244, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=13238, PETRI_PLACES=498, PETRI_TRANSITIONS=489} [2021-11-09 09:37:46,906 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 432 predicate places. [2021-11-09 09:37:46,906 INFO L470 AbstractCegarLoop]: Abstraction has has 498 places, 489 transitions, 13238 flow [2021-11-09 09:37:46,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 54.05263157894737) internal successors, (1027), 19 states have internal predecessors, (1027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:37:46,906 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:37:46,907 INFO L254 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:37:46,930 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-11-09 09:37:47,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:37:47,107 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:37:47,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:37:47,108 INFO L85 PathProgramCache]: Analyzing trace with hash -609053868, now seen corresponding path program 38 times [2021-11-09 09:37:47,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:37:47,108 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152395774] [2021-11-09 09:37:47,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:37:47,108 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:37:47,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:47,334 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:37:47,335 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:37:47,335 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152395774] [2021-11-09 09:37:47,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152395774] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:37:47,335 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828342183] [2021-11-09 09:37:47,335 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:37:47,335 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:37:47,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:37:47,336 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:37:47,357 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-11-09 09:37:48,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:37:48,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:37:48,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-09 09:37:48,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:37:49,076 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:37:49,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828342183] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:37:49,077 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:37:49,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-11-09 09:37:49,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925546635] [2021-11-09 09:37:49,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-09 09:37:49,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:37:49,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-09 09:37:49,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-11-09 09:37:49,079 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-09 09:37:49,079 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 498 places, 489 transitions, 13238 flow. Second operand has 20 states, 20 states have (on average 54.1) internal successors, (1082), 20 states have internal predecessors, (1082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:37:49,079 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:37:49,080 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-09 09:37:49,080 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:37:50,622 INFO L129 PetriNetUnfolder]: 397/3003 cut-off events. [2021-11-09 09:37:50,622 INFO L130 PetriNetUnfolder]: For 199253/199550 co-relation queries the response was YES. [2021-11-09 09:37:50,658 INFO L84 FinitePrefix]: Finished finitePrefix Result has 19405 conditions, 3003 events. 397/3003 cut-off events. For 199253/199550 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 27982 event pairs, 0 based on Foata normal form. 98/2779 useless extension candidates. Maximal degree in co-relation 19184. Up to 499 conditions per place. [2021-11-09 09:37:50,675 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 189 selfloop transitions, 280 changer transitions 8/521 dead transitions. [2021-11-09 09:37:50,675 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 525 places, 521 transitions, 16190 flow [2021-11-09 09:37:50,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-09 09:37:50,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-11-09 09:37:50,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1720 transitions. [2021-11-09 09:37:50,677 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8406647116324536 [2021-11-09 09:37:50,677 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1720 transitions. [2021-11-09 09:37:50,677 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1720 transitions. [2021-11-09 09:37:50,678 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:37:50,678 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1720 transitions. [2021-11-09 09:37:50,680 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 55.483870967741936) internal successors, (1720), 31 states have internal predecessors, (1720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:37:50,682 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 66.0) internal successors, (2112), 32 states have internal predecessors, (2112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:37:50,682 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 66.0) internal successors, (2112), 32 states have internal predecessors, (2112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:37:50,683 INFO L186 Difference]: Start difference. First operand has 498 places, 489 transitions, 13238 flow. Second operand 31 states and 1720 transitions. [2021-11-09 09:37:50,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 525 places, 521 transitions, 16190 flow [2021-11-09 09:37:51,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 503 places, 521 transitions, 15572 flow, removed 112 selfloop flow, removed 22 redundant places. [2021-11-09 09:37:51,372 INFO L242 Difference]: Finished difference. Result has 508 places, 491 transitions, 13474 flow [2021-11-09 09:37:51,372 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=12724, PETRI_DIFFERENCE_MINUEND_PLACES=473, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=489, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=278, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=13474, PETRI_PLACES=508, PETRI_TRANSITIONS=491} [2021-11-09 09:37:51,372 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 442 predicate places. [2021-11-09 09:37:51,373 INFO L470 AbstractCegarLoop]: Abstraction has has 508 places, 491 transitions, 13474 flow [2021-11-09 09:37:51,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 54.1) internal successors, (1082), 20 states have internal predecessors, (1082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:37:51,373 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:37:51,373 INFO L254 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:37:51,397 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-11-09 09:37:51,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:37:51,574 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:37:51,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:37:51,574 INFO L85 PathProgramCache]: Analyzing trace with hash -554055468, now seen corresponding path program 39 times [2021-11-09 09:37:51,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:37:51,574 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059116347] [2021-11-09 09:37:51,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:37:51,574 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:37:51,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:51,762 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:37:51,762 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:37:51,762 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059116347] [2021-11-09 09:37:51,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059116347] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:37:51,763 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494807014] [2021-11-09 09:37:51,763 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:37:51,763 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:37:51,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:37:51,763 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:37:51,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-11-09 09:37:53,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-09 09:37:53,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:37:53,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-09 09:37:53,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:37:53,588 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:37:53,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494807014] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:37:53,589 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:37:53,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-11-09 09:37:53,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042914817] [2021-11-09 09:37:53,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-09 09:37:53,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:37:53,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-09 09:37:53,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-11-09 09:37:53,590 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-09 09:37:53,591 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 508 places, 491 transitions, 13474 flow. Second operand has 20 states, 20 states have (on average 54.1) internal successors, (1082), 20 states have internal predecessors, (1082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:37:53,591 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:37:53,591 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-09 09:37:53,591 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:37:55,095 INFO L129 PetriNetUnfolder]: 402/3041 cut-off events. [2021-11-09 09:37:55,095 INFO L130 PetriNetUnfolder]: For 203263/203564 co-relation queries the response was YES. [2021-11-09 09:37:55,138 INFO L84 FinitePrefix]: Finished finitePrefix Result has 19779 conditions, 3041 events. 402/3041 cut-off events. For 203263/203564 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 28473 event pairs, 0 based on Foata normal form. 124/2840 useless extension candidates. Maximal degree in co-relation 19556. Up to 509 conditions per place. [2021-11-09 09:37:55,156 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 113 selfloop transitions, 364 changer transitions 8/529 dead transitions. [2021-11-09 09:37:55,156 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 539 places, 529 transitions, 16843 flow [2021-11-09 09:37:55,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-09 09:37:55,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-11-09 09:37:55,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 1944 transitions. [2021-11-09 09:37:55,158 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8415584415584415 [2021-11-09 09:37:55,158 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 1944 transitions. [2021-11-09 09:37:55,158 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 1944 transitions. [2021-11-09 09:37:55,158 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:37:55,159 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 1944 transitions. [2021-11-09 09:37:55,161 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 55.542857142857144) internal successors, (1944), 35 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:37:55,163 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 66.0) internal successors, (2376), 36 states have internal predecessors, (2376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:37:55,163 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 66.0) internal successors, (2376), 36 states have internal predecessors, (2376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:37:55,164 INFO L186 Difference]: Start difference. First operand has 508 places, 491 transitions, 13474 flow. Second operand 35 states and 1944 transitions. [2021-11-09 09:37:55,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 539 places, 529 transitions, 16843 flow [2021-11-09 09:37:55,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 511 places, 529 transitions, 16081 flow, removed 120 selfloop flow, removed 28 redundant places. [2021-11-09 09:37:55,941 INFO L242 Difference]: Finished difference. Result has 519 places, 497 transitions, 13995 flow [2021-11-09 09:37:55,942 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=12836, PETRI_DIFFERENCE_MINUEND_PLACES=477, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=491, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=358, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=13995, PETRI_PLACES=519, PETRI_TRANSITIONS=497} [2021-11-09 09:37:55,942 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 453 predicate places. [2021-11-09 09:37:55,942 INFO L470 AbstractCegarLoop]: Abstraction has has 519 places, 497 transitions, 13995 flow [2021-11-09 09:37:55,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 54.1) internal successors, (1082), 20 states have internal predecessors, (1082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:37:55,942 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:37:55,942 INFO L254 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:37:55,967 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-11-09 09:37:56,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-11-09 09:37:56,143 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:37:56,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:37:56,143 INFO L85 PathProgramCache]: Analyzing trace with hash 1725985080, now seen corresponding path program 40 times [2021-11-09 09:37:56,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:37:56,144 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486685340] [2021-11-09 09:37:56,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:37:56,144 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:37:56,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:56,353 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:37:56,354 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:37:56,354 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486685340] [2021-11-09 09:37:56,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486685340] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:37:56,354 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051663210] [2021-11-09 09:37:56,354 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 09:37:56,354 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:37:56,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:37:56,356 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:37:56,357 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-11-09 09:37:57,829 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 09:37:57,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:37:57,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-09 09:37:57,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:37:58,157 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 4 proven. 170 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:37:58,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051663210] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:37:58,157 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:37:58,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-11-09 09:37:58,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776021519] [2021-11-09 09:37:58,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-09 09:37:58,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:37:58,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-09 09:37:58,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-11-09 09:37:58,160 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-09 09:37:58,161 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 519 places, 497 transitions, 13995 flow. Second operand has 20 states, 20 states have (on average 54.1) internal successors, (1082), 20 states have internal predecessors, (1082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:37:58,161 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:37:58,161 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-09 09:37:58,161 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:38:00,004 INFO L129 PetriNetUnfolder]: 408/3088 cut-off events. [2021-11-09 09:38:00,004 INFO L130 PetriNetUnfolder]: For 216934/217245 co-relation queries the response was YES. [2021-11-09 09:38:00,210 INFO L84 FinitePrefix]: Finished finitePrefix Result has 20469 conditions, 3088 events. 408/3088 cut-off events. For 216934/217245 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 28880 event pairs, 0 based on Foata normal form. 135/2894 useless extension candidates. Maximal degree in co-relation 20241. Up to 521 conditions per place. [2021-11-09 09:38:00,230 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 93 selfloop transitions, 393 changer transitions 8/538 dead transitions. [2021-11-09 09:38:00,230 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 552 places, 538 transitions, 17606 flow [2021-11-09 09:38:00,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-09 09:38:00,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-11-09 09:38:00,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2056 transitions. [2021-11-09 09:38:00,232 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8419328419328419 [2021-11-09 09:38:00,232 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2056 transitions. [2021-11-09 09:38:00,232 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2056 transitions. [2021-11-09 09:38:00,232 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:38:00,232 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2056 transitions. [2021-11-09 09:38:00,234 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 55.567567567567565) internal successors, (2056), 37 states have internal predecessors, (2056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:38:00,235 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 66.0) internal successors, (2508), 38 states have internal predecessors, (2508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:38:00,235 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 66.0) internal successors, (2508), 38 states have internal predecessors, (2508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:38:00,235 INFO L186 Difference]: Start difference. First operand has 519 places, 497 transitions, 13995 flow. Second operand 37 states and 2056 transitions. [2021-11-09 09:38:00,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 552 places, 538 transitions, 17606 flow [2021-11-09 09:38:00,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 523 places, 538 transitions, 16763 flow, removed 145 selfloop flow, removed 29 redundant places. [2021-11-09 09:38:00,996 INFO L242 Difference]: Finished difference. Result has 529 places, 505 transitions, 14455 flow [2021-11-09 09:38:00,997 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=13240, PETRI_DIFFERENCE_MINUEND_PLACES=487, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=497, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=385, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=14455, PETRI_PLACES=529, PETRI_TRANSITIONS=505} [2021-11-09 09:38:00,997 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 463 predicate places. [2021-11-09 09:38:00,997 INFO L470 AbstractCegarLoop]: Abstraction has has 529 places, 505 transitions, 14455 flow [2021-11-09 09:38:00,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 54.1) internal successors, (1082), 20 states have internal predecessors, (1082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:38:00,997 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:38:00,997 INFO L254 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:38:01,022 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-11-09 09:38:01,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-11-09 09:38:01,198 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:38:01,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:38:01,198 INFO L85 PathProgramCache]: Analyzing trace with hash 1325819492, now seen corresponding path program 41 times [2021-11-09 09:38:01,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:38:01,198 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982543397] [2021-11-09 09:38:01,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:38:01,199 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:38:01,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:01,395 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:38:01,395 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:38:01,395 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982543397] [2021-11-09 09:38:01,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982543397] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:38:01,395 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67882567] [2021-11-09 09:38:01,395 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 09:38:01,395 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:38:01,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:38:01,396 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:38:01,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-11-09 09:38:03,100 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-11-09 09:38:03,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:38:03,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-09 09:38:03,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:38:03,360 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:38:03,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67882567] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:38:03,360 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:38:03,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2021-11-09 09:38:03,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707284422] [2021-11-09 09:38:03,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-09 09:38:03,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:38:03,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-09 09:38:03,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-11-09 09:38:03,362 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-09 09:38:03,363 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 529 places, 505 transitions, 14455 flow. Second operand has 19 states, 19 states have (on average 54.05263157894737) internal successors, (1027), 19 states have internal predecessors, (1027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:38:03,364 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:38:03,364 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-09 09:38:03,364 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:38:05,087 INFO L129 PetriNetUnfolder]: 423/3176 cut-off events. [2021-11-09 09:38:05,088 INFO L130 PetriNetUnfolder]: For 242567/242890 co-relation queries the response was YES. [2021-11-09 09:38:05,133 INFO L84 FinitePrefix]: Finished finitePrefix Result has 21792 conditions, 3176 events. 423/3176 cut-off events. For 242567/242890 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 29697 event pairs, 0 based on Foata normal form. 140/2979 useless extension candidates. Maximal degree in co-relation 21561. Up to 539 conditions per place. [2021-11-09 09:38:05,162 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 96 selfloop transitions, 401 changer transitions 8/549 dead transitions. [2021-11-09 09:38:05,163 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 561 places, 549 transitions, 18408 flow [2021-11-09 09:38:05,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-09 09:38:05,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-11-09 09:38:05,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2005 transitions. [2021-11-09 09:38:05,165 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8438552188552189 [2021-11-09 09:38:05,166 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2005 transitions. [2021-11-09 09:38:05,166 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2005 transitions. [2021-11-09 09:38:05,166 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:38:05,167 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2005 transitions. [2021-11-09 09:38:05,169 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 55.69444444444444) internal successors, (2005), 36 states have internal predecessors, (2005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:38:05,171 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 66.0) internal successors, (2442), 37 states have internal predecessors, (2442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:38:05,171 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 66.0) internal successors, (2442), 37 states have internal predecessors, (2442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:38:05,172 INFO L186 Difference]: Start difference. First operand has 529 places, 505 transitions, 14455 flow. Second operand 36 states and 2005 transitions. [2021-11-09 09:38:05,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 561 places, 549 transitions, 18408 flow [2021-11-09 09:38:05,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 528 places, 549 transitions, 17289 flow, removed 202 selfloop flow, removed 33 redundant places. [2021-11-09 09:38:05,977 INFO L242 Difference]: Finished difference. Result has 535 places, 511 transitions, 14809 flow [2021-11-09 09:38:05,978 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=13502, PETRI_DIFFERENCE_MINUEND_PLACES=493, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=505, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=395, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=14809, PETRI_PLACES=535, PETRI_TRANSITIONS=511} [2021-11-09 09:38:05,978 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 469 predicate places. [2021-11-09 09:38:05,978 INFO L470 AbstractCegarLoop]: Abstraction has has 535 places, 511 transitions, 14809 flow [2021-11-09 09:38:05,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 54.05263157894737) internal successors, (1027), 19 states have internal predecessors, (1027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:38:05,979 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:38:05,979 INFO L254 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:38:06,022 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-11-09 09:38:06,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-11-09 09:38:06,195 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:38:06,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:38:06,195 INFO L85 PathProgramCache]: Analyzing trace with hash -1099052608, now seen corresponding path program 42 times [2021-11-09 09:38:06,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:38:06,196 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802142655] [2021-11-09 09:38:06,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:38:06,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:38:06,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:06,393 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:38:06,393 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:38:06,393 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802142655] [2021-11-09 09:38:06,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802142655] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:38:06,393 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284179931] [2021-11-09 09:38:06,393 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 09:38:06,394 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:38:06,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:38:06,394 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:38:06,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-11-09 09:38:08,055 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-11-09 09:38:08,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:38:08,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-09 09:38:08,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:38:08,333 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:38:08,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284179931] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:38:08,334 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:38:08,334 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-11-09 09:38:08,334 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546106144] [2021-11-09 09:38:08,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-09 09:38:08,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:38:08,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-09 09:38:08,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-11-09 09:38:08,336 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-09 09:38:08,337 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 535 places, 511 transitions, 14809 flow. Second operand has 21 states, 21 states have (on average 54.095238095238095) internal successors, (1136), 21 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:38:08,337 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:38:08,337 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-09 09:38:08,337 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:38:10,229 INFO L129 PetriNetUnfolder]: 429/3195 cut-off events. [2021-11-09 09:38:10,229 INFO L130 PetriNetUnfolder]: For 266431/266853 co-relation queries the response was YES. [2021-11-09 09:38:10,324 INFO L84 FinitePrefix]: Finished finitePrefix Result has 22618 conditions, 3195 events. 429/3195 cut-off events. For 266431/266853 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 29830 event pairs, 0 based on Foata normal form. 152/3007 useless extension candidates. Maximal degree in co-relation 22383. Up to 547 conditions per place. [2021-11-09 09:38:10,348 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 93 selfloop transitions, 413 changer transitions 17/567 dead transitions. [2021-11-09 09:38:10,348 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 573 places, 567 transitions, 19698 flow [2021-11-09 09:38:10,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-09 09:38:10,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2021-11-09 09:38:10,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 2337 transitions. [2021-11-09 09:38:10,350 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8430735930735931 [2021-11-09 09:38:10,350 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 2337 transitions. [2021-11-09 09:38:10,350 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 2337 transitions. [2021-11-09 09:38:10,350 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:38:10,350 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 2337 transitions. [2021-11-09 09:38:10,352 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 55.642857142857146) internal successors, (2337), 42 states have internal predecessors, (2337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:38:10,353 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 66.0) internal successors, (2838), 43 states have internal predecessors, (2838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:38:10,354 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 66.0) internal successors, (2838), 43 states have internal predecessors, (2838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:38:10,354 INFO L186 Difference]: Start difference. First operand has 535 places, 511 transitions, 14809 flow. Second operand 42 states and 2337 transitions. [2021-11-09 09:38:10,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 573 places, 567 transitions, 19698 flow [2021-11-09 09:38:11,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 542 places, 567 transitions, 18397 flow, removed 294 selfloop flow, removed 31 redundant places. [2021-11-09 09:38:11,454 INFO L242 Difference]: Finished difference. Result has 552 places, 523 transitions, 15333 flow [2021-11-09 09:38:11,459 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=13818, PETRI_DIFFERENCE_MINUEND_PLACES=501, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=511, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=402, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=15333, PETRI_PLACES=552, PETRI_TRANSITIONS=523} [2021-11-09 09:38:11,459 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 486 predicate places. [2021-11-09 09:38:11,460 INFO L470 AbstractCegarLoop]: Abstraction has has 552 places, 523 transitions, 15333 flow [2021-11-09 09:38:11,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 54.095238095238095) internal successors, (1136), 21 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:38:11,460 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:38:11,460 INFO L254 CegarLoopForPetriNet]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:38:11,489 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-11-09 09:38:11,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-11-09 09:38:11,666 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:38:11,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:38:11,667 INFO L85 PathProgramCache]: Analyzing trace with hash 1647212655, now seen corresponding path program 43 times [2021-11-09 09:38:11,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:38:11,667 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327724089] [2021-11-09 09:38:11,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:38:11,667 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:38:11,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:11,936 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:38:11,937 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:38:11,937 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327724089] [2021-11-09 09:38:11,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327724089] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:38:11,937 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18254825] [2021-11-09 09:38:11,937 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 09:38:11,937 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:38:11,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:38:11,938 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:38:11,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-11-09 09:38:13,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:13,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-09 09:38:13,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:38:14,008 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:38:14,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18254825] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:38:14,008 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:38:14,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-11-09 09:38:14,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859192622] [2021-11-09 09:38:14,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-09 09:38:14,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:38:14,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-09 09:38:14,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-11-09 09:38:14,012 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-09 09:38:14,013 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 552 places, 523 transitions, 15333 flow. Second operand has 21 states, 21 states have (on average 54.095238095238095) internal successors, (1136), 21 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:38:14,013 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:38:14,014 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-09 09:38:14,014 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:38:15,806 INFO L129 PetriNetUnfolder]: 425/3189 cut-off events. [2021-11-09 09:38:15,807 INFO L130 PetriNetUnfolder]: For 288018/288413 co-relation queries the response was YES. [2021-11-09 09:38:15,857 INFO L84 FinitePrefix]: Finished finitePrefix Result has 23013 conditions, 3189 events. 425/3189 cut-off events. For 288018/288413 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 29717 event pairs, 0 based on Foata normal form. 57/2905 useless extension candidates. Maximal degree in co-relation 22771. Up to 743 conditions per place. [2021-11-09 09:38:15,881 INFO L132 encePairwiseOnDemand]: 60/66 looper letters, 469 selfloop transitions, 33 changer transitions 8/554 dead transitions. [2021-11-09 09:38:15,881 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 569 places, 554 transitions, 18324 flow [2021-11-09 09:38:15,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-09 09:38:15,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-11-09 09:38:15,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1275 transitions. [2021-11-09 09:38:15,882 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8399209486166008 [2021-11-09 09:38:15,882 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1275 transitions. [2021-11-09 09:38:15,882 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1275 transitions. [2021-11-09 09:38:15,883 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:38:15,883 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1275 transitions. [2021-11-09 09:38:15,884 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 55.43478260869565) internal successors, (1275), 23 states have internal predecessors, (1275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:38:15,884 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 66.0) internal successors, (1584), 24 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:38:15,885 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 66.0) internal successors, (1584), 24 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:38:15,885 INFO L186 Difference]: Start difference. First operand has 552 places, 523 transitions, 15333 flow. Second operand 23 states and 1275 transitions. [2021-11-09 09:38:15,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 569 places, 554 transitions, 18324 flow [2021-11-09 09:38:16,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 532 places, 554 transitions, 16934 flow, removed 289 selfloop flow, removed 37 redundant places. [2021-11-09 09:38:16,800 INFO L242 Difference]: Finished difference. Result has 537 places, 525 transitions, 14263 flow [2021-11-09 09:38:16,801 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=14015, PETRI_DIFFERENCE_MINUEND_PLACES=510, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=523, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=490, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=14263, PETRI_PLACES=537, PETRI_TRANSITIONS=525} [2021-11-09 09:38:16,801 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 471 predicate places. [2021-11-09 09:38:16,801 INFO L470 AbstractCegarLoop]: Abstraction has has 537 places, 525 transitions, 14263 flow [2021-11-09 09:38:16,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 54.095238095238095) internal successors, (1136), 21 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:38:16,801 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:38:16,801 INFO L254 CegarLoopForPetriNet]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:38:16,832 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-11-09 09:38:17,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:38:17,002 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:38:17,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:38:17,003 INFO L85 PathProgramCache]: Analyzing trace with hash -942632505, now seen corresponding path program 44 times [2021-11-09 09:38:17,003 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:38:17,003 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840019993] [2021-11-09 09:38:17,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:38:17,003 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:38:17,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:17,242 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:38:17,242 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:38:17,242 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840019993] [2021-11-09 09:38:17,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840019993] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:38:17,242 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670701270] [2021-11-09 09:38:17,242 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:38:17,242 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:38:17,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:38:17,243 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:38:17,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-11-09 09:38:18,985 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:38:18,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:38:18,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-09 09:38:18,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:38:19,412 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:38:19,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670701270] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:38:19,412 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:38:19,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-11-09 09:38:19,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488399951] [2021-11-09 09:38:19,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-09 09:38:19,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:38:19,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-09 09:38:19,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-11-09 09:38:19,414 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-09 09:38:19,415 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 537 places, 525 transitions, 14263 flow. Second operand has 21 states, 21 states have (on average 54.095238095238095) internal successors, (1136), 21 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:38:19,415 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:38:19,415 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-09 09:38:19,415 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:38:21,075 INFO L129 PetriNetUnfolder]: 427/3207 cut-off events. [2021-11-09 09:38:21,075 INFO L130 PetriNetUnfolder]: For 290093/290448 co-relation queries the response was YES. [2021-11-09 09:38:21,139 INFO L84 FinitePrefix]: Finished finitePrefix Result has 22619 conditions, 3207 events. 427/3207 cut-off events. For 290093/290448 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 29906 event pairs, 0 based on Foata normal form. 65/2929 useless extension candidates. Maximal degree in co-relation 22377. Up to 651 conditions per place. [2021-11-09 09:38:21,166 INFO L132 encePairwiseOnDemand]: 60/66 looper letters, 419 selfloop transitions, 86 changer transitions 8/557 dead transitions. [2021-11-09 09:38:21,166 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 560 places, 557 transitions, 17369 flow [2021-11-09 09:38:21,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-09 09:38:21,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-11-09 09:38:21,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1498 transitions. [2021-11-09 09:38:21,167 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8406285072951739 [2021-11-09 09:38:21,167 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1498 transitions. [2021-11-09 09:38:21,168 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1498 transitions. [2021-11-09 09:38:21,168 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:38:21,168 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1498 transitions. [2021-11-09 09:38:21,169 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 55.48148148148148) internal successors, (1498), 27 states have internal predecessors, (1498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:38:21,170 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 66.0) internal successors, (1848), 28 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:38:21,171 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 66.0) internal successors, (1848), 28 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:38:21,171 INFO L186 Difference]: Start difference. First operand has 537 places, 525 transitions, 14263 flow. Second operand 27 states and 1498 transitions. [2021-11-09 09:38:21,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 560 places, 557 transitions, 17369 flow [2021-11-09 09:38:22,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 540 places, 557 transitions, 17055 flow, removed 126 selfloop flow, removed 20 redundant places. [2021-11-09 09:38:22,287 INFO L242 Difference]: Finished difference. Result has 545 places, 527 transitions, 14417 flow [2021-11-09 09:38:22,288 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=14061, PETRI_DIFFERENCE_MINUEND_PLACES=514, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=525, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=439, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=14417, PETRI_PLACES=545, PETRI_TRANSITIONS=527} [2021-11-09 09:38:22,288 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 479 predicate places. [2021-11-09 09:38:22,288 INFO L470 AbstractCegarLoop]: Abstraction has has 545 places, 527 transitions, 14417 flow [2021-11-09 09:38:22,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 54.095238095238095) internal successors, (1136), 21 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:38:22,289 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:38:22,289 INFO L254 CegarLoopForPetriNet]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:38:22,316 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2021-11-09 09:38:22,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:38:22,489 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:38:22,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:38:22,490 INFO L85 PathProgramCache]: Analyzing trace with hash 1835489349, now seen corresponding path program 45 times [2021-11-09 09:38:22,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:38:22,490 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954614362] [2021-11-09 09:38:22,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:38:22,490 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:38:22,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:22,718 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:38:22,718 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:38:22,718 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954614362] [2021-11-09 09:38:22,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954614362] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:38:22,718 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480617743] [2021-11-09 09:38:22,718 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:38:22,718 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:38:22,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:38:22,719 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:38:22,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-11-09 09:38:24,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-11-09 09:38:24,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:38:24,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-09 09:38:24,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:38:24,807 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:38:24,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480617743] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:38:24,807 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:38:24,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-11-09 09:38:24,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946264923] [2021-11-09 09:38:24,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-09 09:38:24,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:38:24,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-09 09:38:24,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-11-09 09:38:24,810 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-09 09:38:24,811 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 545 places, 527 transitions, 14417 flow. Second operand has 22 states, 22 states have (on average 54.13636363636363) internal successors, (1191), 22 states have internal predecessors, (1191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:38:24,811 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:38:24,811 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-09 09:38:24,811 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:38:26,882 INFO L129 PetriNetUnfolder]: 429/3225 cut-off events. [2021-11-09 09:38:26,882 INFO L130 PetriNetUnfolder]: For 289263/289613 co-relation queries the response was YES. [2021-11-09 09:38:26,937 INFO L84 FinitePrefix]: Finished finitePrefix Result has 22721 conditions, 3225 events. 429/3225 cut-off events. For 289263/289613 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 30084 event pairs, 0 based on Foata normal form. 80/2960 useless extension candidates. Maximal degree in co-relation 22477. Up to 541 conditions per place. [2021-11-09 09:38:26,967 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 300 selfloop transitions, 212 changer transitions 8/564 dead transitions. [2021-11-09 09:38:26,967 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 572 places, 564 transitions, 17739 flow [2021-11-09 09:38:26,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-09 09:38:26,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-11-09 09:38:26,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1719 transitions. [2021-11-09 09:38:26,970 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8401759530791789 [2021-11-09 09:38:26,970 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1719 transitions. [2021-11-09 09:38:26,970 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1719 transitions. [2021-11-09 09:38:26,971 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:38:26,971 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1719 transitions. [2021-11-09 09:38:26,973 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 55.45161290322581) internal successors, (1719), 31 states have internal predecessors, (1719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:38:26,975 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 66.0) internal successors, (2112), 32 states have internal predecessors, (2112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:38:26,976 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 66.0) internal successors, (2112), 32 states have internal predecessors, (2112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:38:26,976 INFO L186 Difference]: Start difference. First operand has 545 places, 527 transitions, 14417 flow. Second operand 31 states and 1719 transitions. [2021-11-09 09:38:26,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 572 places, 564 transitions, 17739 flow [2021-11-09 09:38:27,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 548 places, 564 transitions, 17347 flow, removed 114 selfloop flow, removed 24 redundant places. [2021-11-09 09:38:27,924 INFO L242 Difference]: Finished difference. Result has 553 places, 529 transitions, 14748 flow [2021-11-09 09:38:27,925 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=14125, PETRI_DIFFERENCE_MINUEND_PLACES=518, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=527, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=210, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=14748, PETRI_PLACES=553, PETRI_TRANSITIONS=529} [2021-11-09 09:38:27,925 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 487 predicate places. [2021-11-09 09:38:27,926 INFO L470 AbstractCegarLoop]: Abstraction has has 553 places, 529 transitions, 14748 flow [2021-11-09 09:38:27,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 54.13636363636363) internal successors, (1191), 22 states have internal predecessors, (1191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:38:27,926 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:38:27,926 INFO L254 CegarLoopForPetriNet]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:38:27,955 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-11-09 09:38:28,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-11-09 09:38:28,135 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:38:28,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:38:28,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1645461613, now seen corresponding path program 46 times [2021-11-09 09:38:28,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:38:28,136 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110283956] [2021-11-09 09:38:28,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:38:28,136 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:38:28,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:28,330 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:38:28,331 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:38:28,331 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110283956] [2021-11-09 09:38:28,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110283956] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:38:28,331 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67440775] [2021-11-09 09:38:28,331 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 09:38:28,331 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:38:28,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:38:28,332 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:38:28,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-11-09 09:38:30,022 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 09:38:30,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:38:30,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-09 09:38:30,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:38:30,407 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:38:30,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67440775] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:38:30,407 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:38:30,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-11-09 09:38:30,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642952964] [2021-11-09 09:38:30,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-09 09:38:30,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:38:30,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-09 09:38:30,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-11-09 09:38:30,410 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-09 09:38:30,411 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 553 places, 529 transitions, 14748 flow. Second operand has 21 states, 21 states have (on average 54.095238095238095) internal successors, (1136), 21 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:38:30,411 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:38:30,411 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-09 09:38:30,411 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:38:32,233 INFO L129 PetriNetUnfolder]: 431/3243 cut-off events. [2021-11-09 09:38:32,233 INFO L130 PetriNetUnfolder]: For 291870/292220 co-relation queries the response was YES. [2021-11-09 09:38:32,290 INFO L84 FinitePrefix]: Finished finitePrefix Result has 22988 conditions, 3243 events. 431/3243 cut-off events. For 291870/292220 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 30244 event pairs, 0 based on Foata normal form. 112/3008 useless extension candidates. Maximal degree in co-relation 22741. Up to 545 conditions per place. [2021-11-09 09:38:32,325 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 199 selfloop transitions, 310 changer transitions 8/561 dead transitions. [2021-11-09 09:38:32,325 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 583 places, 561 transitions, 18163 flow [2021-11-09 09:38:32,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-09 09:38:32,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-11-09 09:38:32,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1887 transitions. [2021-11-09 09:38:32,327 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8409090909090909 [2021-11-09 09:38:32,328 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1887 transitions. [2021-11-09 09:38:32,328 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1887 transitions. [2021-11-09 09:38:32,328 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:38:32,329 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1887 transitions. [2021-11-09 09:38:32,331 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 55.5) internal successors, (1887), 34 states have internal predecessors, (1887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:38:32,333 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 66.0) internal successors, (2310), 35 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:38:32,334 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 66.0) internal successors, (2310), 35 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:38:32,334 INFO L186 Difference]: Start difference. First operand has 553 places, 529 transitions, 14748 flow. Second operand 34 states and 1887 transitions. [2021-11-09 09:38:32,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 583 places, 561 transitions, 18163 flow [2021-11-09 09:38:33,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 556 places, 561 transitions, 17551 flow, removed 122 selfloop flow, removed 27 redundant places. [2021-11-09 09:38:33,346 INFO L242 Difference]: Finished difference. Result has 561 places, 531 transitions, 15075 flow [2021-11-09 09:38:33,346 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=14244, PETRI_DIFFERENCE_MINUEND_PLACES=523, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=308, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=15075, PETRI_PLACES=561, PETRI_TRANSITIONS=531} [2021-11-09 09:38:33,346 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 495 predicate places. [2021-11-09 09:38:33,347 INFO L470 AbstractCegarLoop]: Abstraction has has 561 places, 531 transitions, 15075 flow [2021-11-09 09:38:33,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 54.095238095238095) internal successors, (1136), 21 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:38:33,347 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:38:33,347 INFO L254 CegarLoopForPetriNet]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:38:33,375 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-11-09 09:38:33,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-11-09 09:38:33,551 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:38:33,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:38:33,551 INFO L85 PathProgramCache]: Analyzing trace with hash -1873939515, now seen corresponding path program 47 times [2021-11-09 09:38:33,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:38:33,551 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845065517] [2021-11-09 09:38:33,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:38:33,552 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:38:33,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:33,975 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:38:33,975 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:38:33,975 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845065517] [2021-11-09 09:38:33,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845065517] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:38:33,975 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278595852] [2021-11-09 09:38:33,976 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 09:38:33,976 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:38:33,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:38:33,979 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:38:33,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-11-09 09:38:35,744 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-11-09 09:38:35,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:38:35,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-09 09:38:35,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:38:36,108 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:38:36,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278595852] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:38:36,109 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:38:36,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-11-09 09:38:36,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57225271] [2021-11-09 09:38:36,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-09 09:38:36,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:38:36,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-09 09:38:36,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-11-09 09:38:36,111 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-09 09:38:36,112 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 561 places, 531 transitions, 15075 flow. Second operand has 22 states, 22 states have (on average 54.13636363636363) internal successors, (1191), 22 states have internal predecessors, (1191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:38:36,112 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:38:36,112 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-09 09:38:36,112 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:38:37,948 INFO L129 PetriNetUnfolder]: 433/3254 cut-off events. [2021-11-09 09:38:37,948 INFO L130 PetriNetUnfolder]: For 292845/293227 co-relation queries the response was YES. [2021-11-09 09:38:38,018 INFO L84 FinitePrefix]: Finished finitePrefix Result has 23248 conditions, 3254 events. 433/3254 cut-off events. For 292845/293227 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 30374 event pairs, 0 based on Foata normal form. 117/3023 useless extension candidates. Maximal degree in co-relation 22999. Up to 549 conditions per place. [2021-11-09 09:38:38,045 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 180 selfloop transitions, 332 changer transitions 8/564 dead transitions. [2021-11-09 09:38:38,045 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 592 places, 564 transitions, 18592 flow [2021-11-09 09:38:38,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-09 09:38:38,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-11-09 09:38:38,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 1943 transitions. [2021-11-09 09:38:38,047 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8411255411255412 [2021-11-09 09:38:38,047 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 1943 transitions. [2021-11-09 09:38:38,047 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 1943 transitions. [2021-11-09 09:38:38,047 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:38:38,047 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 1943 transitions. [2021-11-09 09:38:38,049 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 55.51428571428571) internal successors, (1943), 35 states have internal predecessors, (1943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:38:38,050 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 66.0) internal successors, (2376), 36 states have internal predecessors, (2376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:38:38,051 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 66.0) internal successors, (2376), 36 states have internal predecessors, (2376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:38:38,051 INFO L186 Difference]: Start difference. First operand has 561 places, 531 transitions, 15075 flow. Second operand 35 states and 1943 transitions. [2021-11-09 09:38:38,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 592 places, 564 transitions, 18592 flow [2021-11-09 09:38:39,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 560 places, 564 transitions, 17726 flow, removed 124 selfloop flow, removed 32 redundant places. [2021-11-09 09:38:39,315 INFO L242 Difference]: Finished difference. Result has 565 places, 533 transitions, 15204 flow [2021-11-09 09:38:39,316 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=14321, PETRI_DIFFERENCE_MINUEND_PLACES=526, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=531, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=330, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=15204, PETRI_PLACES=565, PETRI_TRANSITIONS=533} [2021-11-09 09:38:39,316 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 499 predicate places. [2021-11-09 09:38:39,316 INFO L470 AbstractCegarLoop]: Abstraction has has 565 places, 533 transitions, 15204 flow [2021-11-09 09:38:39,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 54.13636363636363) internal successors, (1191), 22 states have internal predecessors, (1191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:38:39,316 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:38:39,316 INFO L254 CegarLoopForPetriNet]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:38:39,345 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-11-09 09:38:39,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:38:39,519 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:38:39,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:38:39,520 INFO L85 PathProgramCache]: Analyzing trace with hash -993388705, now seen corresponding path program 48 times [2021-11-09 09:38:39,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:38:39,520 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367599489] [2021-11-09 09:38:39,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:38:39,520 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:38:39,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:39,754 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:38:39,754 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:38:39,754 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367599489] [2021-11-09 09:38:39,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367599489] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:38:39,754 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939919522] [2021-11-09 09:38:39,754 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 09:38:39,755 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:38:39,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:38:39,756 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:38:39,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-11-09 09:38:41,722 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-11-09 09:38:41,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:38:41,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-09 09:38:41,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:38:42,054 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:38:42,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939919522] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:38:42,055 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:38:42,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-11-09 09:38:42,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829142817] [2021-11-09 09:38:42,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-09 09:38:42,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:38:42,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-09 09:38:42,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-11-09 09:38:42,057 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-09 09:38:42,058 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 565 places, 533 transitions, 15204 flow. Second operand has 21 states, 21 states have (on average 54.095238095238095) internal successors, (1136), 21 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:38:42,058 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:38:42,058 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-09 09:38:42,058 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:38:44,018 INFO L129 PetriNetUnfolder]: 437/3297 cut-off events. [2021-11-09 09:38:44,018 INFO L130 PetriNetUnfolder]: For 296612/296962 co-relation queries the response was YES. [2021-11-09 09:38:44,072 INFO L84 FinitePrefix]: Finished finitePrefix Result has 23552 conditions, 3297 events. 437/3297 cut-off events. For 296612/296962 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 30885 event pairs, 0 based on Foata normal form. 126/3070 useless extension candidates. Maximal degree in co-relation 23301. Up to 557 conditions per place. [2021-11-09 09:38:44,094 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 160 selfloop transitions, 356 changer transitions 8/568 dead transitions. [2021-11-09 09:38:44,094 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 597 places, 568 transitions, 18848 flow [2021-11-09 09:38:44,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-09 09:38:44,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-11-09 09:38:44,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 1999 transitions. [2021-11-09 09:38:44,096 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8413299663299664 [2021-11-09 09:38:44,096 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 1999 transitions. [2021-11-09 09:38:44,096 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 1999 transitions. [2021-11-09 09:38:44,096 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:38:44,097 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 1999 transitions. [2021-11-09 09:38:44,098 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 55.52777777777778) internal successors, (1999), 36 states have internal predecessors, (1999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:38:44,099 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 66.0) internal successors, (2442), 37 states have internal predecessors, (2442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:38:44,100 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 66.0) internal successors, (2442), 37 states have internal predecessors, (2442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:38:44,100 INFO L186 Difference]: Start difference. First operand has 565 places, 533 transitions, 15204 flow. Second operand 36 states and 1999 transitions. [2021-11-09 09:38:44,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 597 places, 568 transitions, 18848 flow [2021-11-09 09:38:44,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 565 places, 568 transitions, 17981 flow, removed 123 selfloop flow, removed 32 redundant places. [2021-11-09 09:38:44,954 INFO L242 Difference]: Finished difference. Result has 570 places, 537 transitions, 15454 flow [2021-11-09 09:38:44,954 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=14453, PETRI_DIFFERENCE_MINUEND_PLACES=530, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=533, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=352, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=15454, PETRI_PLACES=570, PETRI_TRANSITIONS=537} [2021-11-09 09:38:44,954 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 504 predicate places. [2021-11-09 09:38:44,955 INFO L470 AbstractCegarLoop]: Abstraction has has 570 places, 537 transitions, 15454 flow [2021-11-09 09:38:44,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 54.095238095238095) internal successors, (1136), 21 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:38:44,955 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:38:44,955 INFO L254 CegarLoopForPetriNet]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:38:44,981 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-11-09 09:38:45,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-11-09 09:38:45,159 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:38:45,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:38:45,159 INFO L85 PathProgramCache]: Analyzing trace with hash -1291318595, now seen corresponding path program 49 times [2021-11-09 09:38:45,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:38:45,160 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933063931] [2021-11-09 09:38:45,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:38:45,160 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:38:45,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:45,360 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:38:45,360 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:38:45,360 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933063931] [2021-11-09 09:38:45,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933063931] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:38:45,360 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934746377] [2021-11-09 09:38:45,360 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 09:38:45,360 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:38:45,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:38:45,363 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:38:45,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-11-09 09:38:47,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:47,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-09 09:38:47,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:38:47,785 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:38:47,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934746377] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:38:47,786 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:38:47,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-11-09 09:38:47,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353713646] [2021-11-09 09:38:47,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-09 09:38:47,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:38:47,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-09 09:38:47,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-11-09 09:38:47,789 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-09 09:38:47,790 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 570 places, 537 transitions, 15454 flow. Second operand has 21 states, 21 states have (on average 54.095238095238095) internal successors, (1136), 21 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:38:47,790 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:38:47,790 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-09 09:38:47,791 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:38:49,568 INFO L129 PetriNetUnfolder]: 441/3326 cut-off events. [2021-11-09 09:38:49,568 INFO L130 PetriNetUnfolder]: For 300617/300999 co-relation queries the response was YES. [2021-11-09 09:38:49,630 INFO L84 FinitePrefix]: Finished finitePrefix Result has 23876 conditions, 3326 events. 441/3326 cut-off events. For 300617/300999 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 31223 event pairs, 0 based on Foata normal form. 141/3112 useless extension candidates. Maximal degree in co-relation 23623. Up to 565 conditions per place. [2021-11-09 09:38:49,652 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 134 selfloop transitions, 389 changer transitions 8/575 dead transitions. [2021-11-09 09:38:49,652 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 604 places, 575 transitions, 19289 flow [2021-11-09 09:38:49,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-09 09:38:49,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-11-09 09:38:49,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 2111 transitions. [2021-11-09 09:38:49,654 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8417065390749602 [2021-11-09 09:38:49,654 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 2111 transitions. [2021-11-09 09:38:49,655 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 2111 transitions. [2021-11-09 09:38:49,655 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:38:49,655 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 2111 transitions. [2021-11-09 09:38:49,658 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 55.55263157894737) internal successors, (2111), 38 states have internal predecessors, (2111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:38:49,660 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 66.0) internal successors, (2574), 39 states have internal predecessors, (2574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:38:49,661 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 66.0) internal successors, (2574), 39 states have internal predecessors, (2574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:38:49,661 INFO L186 Difference]: Start difference. First operand has 570 places, 537 transitions, 15454 flow. Second operand 38 states and 2111 transitions. [2021-11-09 09:38:49,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 604 places, 575 transitions, 19289 flow [2021-11-09 09:38:50,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 571 places, 575 transitions, 18374 flow, removed 127 selfloop flow, removed 33 redundant places. [2021-11-09 09:38:50,943 INFO L242 Difference]: Finished difference. Result has 576 places, 541 transitions, 15743 flow [2021-11-09 09:38:50,943 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=14663, PETRI_DIFFERENCE_MINUEND_PLACES=534, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=537, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=385, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=15743, PETRI_PLACES=576, PETRI_TRANSITIONS=541} [2021-11-09 09:38:50,944 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 510 predicate places. [2021-11-09 09:38:50,944 INFO L470 AbstractCegarLoop]: Abstraction has has 576 places, 541 transitions, 15743 flow [2021-11-09 09:38:50,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 54.095238095238095) internal successors, (1136), 21 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:38:50,944 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:38:50,944 INFO L254 CegarLoopForPetriNet]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:38:50,974 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2021-11-09 09:38:51,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-11-09 09:38:51,145 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:38:51,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:38:51,145 INFO L85 PathProgramCache]: Analyzing trace with hash -525280337, now seen corresponding path program 50 times [2021-11-09 09:38:51,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:38:51,145 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354392466] [2021-11-09 09:38:51,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:38:51,146 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:38:51,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:51,380 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:38:51,380 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:38:51,380 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354392466] [2021-11-09 09:38:51,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354392466] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:38:51,381 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237412097] [2021-11-09 09:38:51,381 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:38:51,381 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:38:51,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:38:51,383 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:38:51,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-11-09 09:38:53,427 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:38:53,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:38:53,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-09 09:38:53,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:38:53,770 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:38:53,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237412097] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:38:53,771 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:38:53,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-11-09 09:38:53,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825326644] [2021-11-09 09:38:53,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-09 09:38:53,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:38:53,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-09 09:38:53,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-11-09 09:38:53,774 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-09 09:38:53,776 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 576 places, 541 transitions, 15743 flow. Second operand has 22 states, 22 states have (on average 54.13636363636363) internal successors, (1191), 22 states have internal predecessors, (1191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:38:53,776 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:38:53,776 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-09 09:38:53,776 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:38:56,301 INFO L129 PetriNetUnfolder]: 444/3360 cut-off events. [2021-11-09 09:38:56,301 INFO L130 PetriNetUnfolder]: For 304610/304960 co-relation queries the response was YES. [2021-11-09 09:38:56,358 INFO L84 FinitePrefix]: Finished finitePrefix Result has 24167 conditions, 3360 events. 444/3360 cut-off events. For 304610/304960 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 31566 event pairs, 0 based on Foata normal form. 146/3148 useless extension candidates. Maximal degree in co-relation 23912. Up to 571 conditions per place. [2021-11-09 09:38:56,382 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 123 selfloop transitions, 407 changer transitions 8/582 dead transitions. [2021-11-09 09:38:56,382 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 611 places, 582 transitions, 19755 flow [2021-11-09 09:38:56,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-09 09:38:56,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-11-09 09:38:56,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2167 transitions. [2021-11-09 09:38:56,384 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8418803418803419 [2021-11-09 09:38:56,384 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2167 transitions. [2021-11-09 09:38:56,384 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2167 transitions. [2021-11-09 09:38:56,385 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:38:56,385 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2167 transitions. [2021-11-09 09:38:56,387 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 55.56410256410256) internal successors, (2167), 39 states have internal predecessors, (2167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:38:56,388 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 66.0) internal successors, (2640), 40 states have internal predecessors, (2640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:38:56,388 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 66.0) internal successors, (2640), 40 states have internal predecessors, (2640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:38:56,388 INFO L186 Difference]: Start difference. First operand has 576 places, 541 transitions, 15743 flow. Second operand 39 states and 2167 transitions. [2021-11-09 09:38:56,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 611 places, 582 transitions, 19755 flow [2021-11-09 09:38:57,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 575 places, 582 transitions, 18747 flow, removed 133 selfloop flow, removed 36 redundant places. [2021-11-09 09:38:57,599 INFO L242 Difference]: Finished difference. Result has 581 places, 546 transitions, 16060 flow [2021-11-09 09:38:57,600 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=14867, PETRI_DIFFERENCE_MINUEND_PLACES=537, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=541, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=402, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=16060, PETRI_PLACES=581, PETRI_TRANSITIONS=546} [2021-11-09 09:38:57,601 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 515 predicate places. [2021-11-09 09:38:57,601 INFO L470 AbstractCegarLoop]: Abstraction has has 581 places, 546 transitions, 16060 flow [2021-11-09 09:38:57,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 54.13636363636363) internal successors, (1191), 22 states have internal predecessors, (1191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:38:57,601 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:38:57,602 INFO L254 CegarLoopForPetriNet]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:38:57,658 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2021-11-09 09:38:57,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:38:57,815 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:38:57,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:38:57,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1990586465, now seen corresponding path program 51 times [2021-11-09 09:38:57,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:38:57,816 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941195462] [2021-11-09 09:38:57,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:38:57,816 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:38:57,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:58,278 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:38:58,278 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:38:58,279 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941195462] [2021-11-09 09:38:58,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941195462] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:38:58,279 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083138384] [2021-11-09 09:38:58,279 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:38:58,279 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:38:58,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:38:58,281 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:38:58,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-11-09 09:39:00,593 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-11-09 09:39:00,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:39:00,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-09 09:39:00,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:39:00,924 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:39:00,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083138384] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:39:00,925 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:39:00,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-11-09 09:39:00,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190222570] [2021-11-09 09:39:00,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-09 09:39:00,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:39:00,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-09 09:39:00,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-11-09 09:39:00,928 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-09 09:39:00,930 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 581 places, 546 transitions, 16060 flow. Second operand has 21 states, 21 states have (on average 54.095238095238095) internal successors, (1136), 21 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:39:00,930 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:39:00,930 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-09 09:39:00,930 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:39:03,157 INFO L129 PetriNetUnfolder]: 459/3421 cut-off events. [2021-11-09 09:39:03,157 INFO L130 PetriNetUnfolder]: For 330511/330930 co-relation queries the response was YES. [2021-11-09 09:39:03,477 INFO L84 FinitePrefix]: Finished finitePrefix Result has 25348 conditions, 3421 events. 459/3421 cut-off events. For 330511/330930 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 32012 event pairs, 0 based on Foata normal form. 154/3212 useless extension candidates. Maximal degree in co-relation 25090. Up to 591 conditions per place. [2021-11-09 09:39:03,521 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 125 selfloop transitions, 416 changer transitions 8/593 dead transitions. [2021-11-09 09:39:03,521 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 617 places, 593 transitions, 20492 flow [2021-11-09 09:39:03,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-09 09:39:03,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2021-11-09 09:39:03,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2227 transitions. [2021-11-09 09:39:03,524 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.843560606060606 [2021-11-09 09:39:03,525 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2227 transitions. [2021-11-09 09:39:03,525 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2227 transitions. [2021-11-09 09:39:03,526 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:39:03,526 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2227 transitions. [2021-11-09 09:39:03,529 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 55.675) internal successors, (2227), 40 states have internal predecessors, (2227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:39:03,531 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 66.0) internal successors, (2706), 41 states have internal predecessors, (2706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:39:03,532 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 66.0) internal successors, (2706), 41 states have internal predecessors, (2706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:39:03,532 INFO L186 Difference]: Start difference. First operand has 581 places, 546 transitions, 16060 flow. Second operand 40 states and 2227 transitions. [2021-11-09 09:39:03,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 617 places, 593 transitions, 20492 flow [2021-11-09 09:39:04,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 582 places, 593 transitions, 19408 flow, removed 173 selfloop flow, removed 35 redundant places. [2021-11-09 09:39:04,915 INFO L242 Difference]: Finished difference. Result has 589 places, 552 transitions, 16494 flow [2021-11-09 09:39:04,916 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=15094, PETRI_DIFFERENCE_MINUEND_PLACES=543, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=546, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=410, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=16494, PETRI_PLACES=589, PETRI_TRANSITIONS=552} [2021-11-09 09:39:04,916 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 523 predicate places. [2021-11-09 09:39:04,916 INFO L470 AbstractCegarLoop]: Abstraction has has 589 places, 552 transitions, 16494 flow [2021-11-09 09:39:04,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 54.095238095238095) internal successors, (1136), 21 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:39:04,916 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:39:04,917 INFO L254 CegarLoopForPetriNet]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:39:04,945 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2021-11-09 09:39:05,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-11-09 09:39:05,117 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:39:05,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:39:05,118 INFO L85 PathProgramCache]: Analyzing trace with hash -73809751, now seen corresponding path program 52 times [2021-11-09 09:39:05,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:39:05,118 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711745930] [2021-11-09 09:39:05,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:39:05,118 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:39:05,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:39:05,305 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:39:05,305 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:39:05,305 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711745930] [2021-11-09 09:39:05,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711745930] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:39:05,306 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428488552] [2021-11-09 09:39:05,306 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 09:39:05,306 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:39:05,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:39:05,307 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:39:05,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0620e8c9-4cd8-4646-8068-15936e8592a1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-11-09 09:39:07,544 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 09:39:07,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:39:07,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-09 09:39:07,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:39:07,923 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:39:07,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428488552] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:39:07,923 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:39:07,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-11-09 09:39:07,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238055404] [2021-11-09 09:39:07,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-09 09:39:07,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:39:07,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-09 09:39:07,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-11-09 09:39:07,925 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-09 09:39:07,926 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 589 places, 552 transitions, 16494 flow. Second operand has 22 states, 22 states have (on average 54.09090909090909) internal successors, (1190), 22 states have internal predecessors, (1190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:39:07,926 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:39:07,926 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-09 09:39:07,926 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand