./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/test-easy11.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/test-easy11.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa --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 a686a41ee4cc6bbffea13719827ccaf379a83824b0020cd9f2e7eecebabb9242 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 18:59:06,800 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 18:59:06,801 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 18:59:06,831 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 18:59:06,832 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 18:59:06,833 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 18:59:06,834 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 18:59:06,837 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 18:59:06,839 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 18:59:06,840 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 18:59:06,841 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 18:59:06,842 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 18:59:06,842 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 18:59:06,843 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 18:59:06,845 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 18:59:06,846 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 18:59:06,847 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 18:59:06,848 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 18:59:06,850 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 18:59:06,852 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 18:59:06,854 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 18:59:06,855 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 18:59:06,856 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 18:59:06,857 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 18:59:06,859 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 18:59:06,860 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 18:59:06,860 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 18:59:06,861 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 18:59:06,861 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 18:59:06,862 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 18:59:06,862 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 18:59:06,863 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 18:59:06,863 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 18:59:06,864 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 18:59:06,865 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 18:59:06,865 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 18:59:06,866 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 18:59:06,866 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 18:59:06,866 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 18:59:06,866 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 18:59:06,867 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 18:59:06,868 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 18:59:06,890 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 18:59:06,890 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 18:59:06,890 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 18:59:06,890 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 18:59:06,891 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 18:59:06,891 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 18:59:06,892 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 18:59:06,892 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 18:59:06,892 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 18:59:06,893 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 18:59:06,893 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 18:59:06,893 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 18:59:06,893 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 18:59:06,893 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 18:59:06,894 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 18:59:06,894 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 18:59:06,894 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 18:59:06,894 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 18:59:06,894 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 18:59:06,894 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 18:59:06,895 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 18:59:06,895 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 18:59:06,895 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 18:59:06,895 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 18:59:06,895 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 18:59:06,896 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 18:59:06,896 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 18:59:06,896 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 18:59:06,896 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 18:59:06,897 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 18:59:06,897 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 18:59:06,897 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 18:59:06,897 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 18:59:06,897 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 18:59:06,897 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_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a686a41ee4cc6bbffea13719827ccaf379a83824b0020cd9f2e7eecebabb9242 [2021-12-06 18:59:07,086 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 18:59:07,101 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 18:59:07,103 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 18:59:07,104 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 18:59:07,104 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 18:59:07,105 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/weaver/test-easy11.wvr.c [2021-12-06 18:59:07,146 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/data/d4e97e026/5c83f3eaf15b490aaa9de79b9ce8cd18/FLAGa2664b49d [2021-12-06 18:59:07,509 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 18:59:07,510 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/sv-benchmarks/c/weaver/test-easy11.wvr.c [2021-12-06 18:59:07,516 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/data/d4e97e026/5c83f3eaf15b490aaa9de79b9ce8cd18/FLAGa2664b49d [2021-12-06 18:59:07,527 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/data/d4e97e026/5c83f3eaf15b490aaa9de79b9ce8cd18 [2021-12-06 18:59:07,530 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 18:59:07,531 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 18:59:07,532 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 18:59:07,532 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 18:59:07,535 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 18:59:07,535 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 06:59:07" (1/1) ... [2021-12-06 18:59:07,536 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c1d477 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:59:07, skipping insertion in model container [2021-12-06 18:59:07,536 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 06:59:07" (1/1) ... [2021-12-06 18:59:07,542 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 18:59:07,555 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 18:59:07,689 WARN L230 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_e306794e-1076-44b4-8d49-0b5cd34985b1/sv-benchmarks/c/weaver/test-easy11.wvr.c[2005,2018] [2021-12-06 18:59:07,692 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 18:59:07,697 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 18:59:07,711 WARN L230 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_e306794e-1076-44b4-8d49-0b5cd34985b1/sv-benchmarks/c/weaver/test-easy11.wvr.c[2005,2018] [2021-12-06 18:59:07,711 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 18:59:07,721 INFO L208 MainTranslator]: Completed translation [2021-12-06 18:59:07,721 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:59:07 WrapperNode [2021-12-06 18:59:07,722 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 18:59:07,722 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 18:59:07,722 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 18:59:07,722 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 18:59:07,728 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:59:07" (1/1) ... [2021-12-06 18:59:07,733 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:59:07" (1/1) ... [2021-12-06 18:59:07,745 INFO L137 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 53 [2021-12-06 18:59:07,746 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 18:59:07,746 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 18:59:07,746 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 18:59:07,746 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 18:59:07,752 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:59:07" (1/1) ... [2021-12-06 18:59:07,752 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:59:07" (1/1) ... [2021-12-06 18:59:07,754 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:59:07" (1/1) ... [2021-12-06 18:59:07,754 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:59:07" (1/1) ... [2021-12-06 18:59:07,757 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:59:07" (1/1) ... [2021-12-06 18:59:07,760 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:59:07" (1/1) ... [2021-12-06 18:59:07,761 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:59:07" (1/1) ... [2021-12-06 18:59:07,763 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 18:59:07,763 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 18:59:07,763 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 18:59:07,763 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 18:59:07,764 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:59:07" (1/1) ... [2021-12-06 18:59:07,771 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 18:59:07,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:59:07,793 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 18:59:07,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 18:59:07,825 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 18:59:07,825 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-12-06 18:59:07,825 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-12-06 18:59:07,825 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-12-06 18:59:07,826 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-12-06 18:59:07,826 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 18:59:07,826 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-06 18:59:07,826 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-06 18:59:07,826 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-12-06 18:59:07,826 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-12-06 18:59:07,826 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 18:59:07,826 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 18:59:07,826 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-06 18:59:07,826 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-06 18:59:07,827 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-12-06 18:59:07,890 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 18:59:07,891 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 18:59:08,018 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 18:59:08,027 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 18:59:08,027 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-06 18:59:08,029 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 06:59:08 BoogieIcfgContainer [2021-12-06 18:59:08,029 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 18:59:08,031 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 18:59:08,031 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 18:59:08,034 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 18:59:08,035 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 06:59:07" (1/3) ... [2021-12-06 18:59:08,035 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3944ed60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 06:59:08, skipping insertion in model container [2021-12-06 18:59:08,036 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:59:07" (2/3) ... [2021-12-06 18:59:08,036 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3944ed60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 06:59:08, skipping insertion in model container [2021-12-06 18:59:08,036 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 06:59:08" (3/3) ... [2021-12-06 18:59:08,037 INFO L111 eAbstractionObserver]: Analyzing ICFG test-easy11.wvr.c [2021-12-06 18:59:08,043 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-12-06 18:59:08,043 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 18:59:08,043 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 18:59:08,043 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-12-06 18:59:08,071 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~x~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:59:08,072 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~x~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:59:08,072 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~x~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:59:08,072 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~x~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:59:08,072 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~x~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:59:08,073 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~x~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:59:08,073 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~x~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:59:08,073 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~x~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:59:08,073 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~x~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:59:08,074 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~x~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:59:08,074 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~x~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:59:08,074 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:59:08,074 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~x~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:59:08,074 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:59:08,075 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:59:08,075 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:59:08,075 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:59:08,075 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:59:08,075 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:59:08,075 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~x~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:59:08,076 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:59:08,076 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~x~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:59:08,076 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:59:08,076 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:59:08,077 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~x~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:59:08,077 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~x~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:59:08,077 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~x~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:59:08,077 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~x~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:59:08,078 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~x~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:59:08,078 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~x~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:59:08,078 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~x~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:59:08,078 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~x~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:59:08,079 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~x~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:59:08,079 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~x~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:59:08,079 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~x~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:59:08,079 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:59:08,080 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~x~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:59:08,080 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:59:08,080 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:59:08,080 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:59:08,080 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:59:08,080 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:59:08,081 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:59:08,081 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~x~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:59:08,081 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:59:08,081 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~x~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:59:08,082 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:59:08,082 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:59:08,085 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:59:08,085 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:59:08,085 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~x~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:59:08,085 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:59:08,088 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:59:08,088 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:59:08,088 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~x~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:59:08,088 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:59:08,092 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-12-06 18:59:08,142 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 18:59:08,149 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 [2021-12-06 18:59:08,149 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-12-06 18:59:08,161 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 88 places, 87 transitions, 190 flow [2021-12-06 18:59:08,207 INFO L129 PetriNetUnfolder]: 6/85 cut-off events. [2021-12-06 18:59:08,207 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-06 18:59:08,210 INFO L84 FinitePrefix]: Finished finitePrefix Result has 94 conditions, 85 events. 6/85 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 53 event pairs, 0 based on Foata normal form. 0/78 useless extension candidates. Maximal degree in co-relation 49. Up to 2 conditions per place. [2021-12-06 18:59:08,211 INFO L82 GeneralOperation]: Start removeDead. Operand has 88 places, 87 transitions, 190 flow [2021-12-06 18:59:08,216 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 77 places, 76 transitions, 164 flow [2021-12-06 18:59:08,239 INFO L129 PetriNetUnfolder]: 6/75 cut-off events. [2021-12-06 18:59:08,239 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-06 18:59:08,239 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 18:59:08,240 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:59:08,240 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 18:59:08,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:59:08,245 INFO L85 PathProgramCache]: Analyzing trace with hash -384738625, now seen corresponding path program 1 times [2021-12-06 18:59:08,254 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:59:08,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143100771] [2021-12-06 18:59:08,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:59:08,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:59:08,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:59:08,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:59:08,415 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:59:08,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143100771] [2021-12-06 18:59:08,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143100771] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:59:08,416 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:59:08,416 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 18:59:08,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238173770] [2021-12-06 18:59:08,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:59:08,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-06 18:59:08,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:59:08,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-06 18:59:08,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 18:59:08,448 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 87 [2021-12-06 18:59:08,451 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 76 transitions, 164 flow. Second operand has 2 states, 2 states have (on average 81.0) internal successors, (162), 2 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:08,451 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 18:59:08,451 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 87 [2021-12-06 18:59:08,452 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 18:59:08,480 INFO L129 PetriNetUnfolder]: 2/72 cut-off events. [2021-12-06 18:59:08,480 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2021-12-06 18:59:08,480 INFO L84 FinitePrefix]: Finished finitePrefix Result has 86 conditions, 72 events. 2/72 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 47 event pairs, 0 based on Foata normal form. 6/74 useless extension candidates. Maximal degree in co-relation 48. Up to 5 conditions per place. [2021-12-06 18:59:08,481 INFO L132 encePairwiseOnDemand]: 83/87 looper letters, 4 selfloop transitions, 0 changer transitions 2/72 dead transitions. [2021-12-06 18:59:08,481 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 72 transitions, 164 flow [2021-12-06 18:59:08,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-06 18:59:08,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-12-06 18:59:08,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 164 transitions. [2021-12-06 18:59:08,491 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9425287356321839 [2021-12-06 18:59:08,492 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 164 transitions. [2021-12-06 18:59:08,492 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 164 transitions. [2021-12-06 18:59:08,493 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 18:59:08,495 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 164 transitions. [2021-12-06 18:59:08,497 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 82.0) internal successors, (164), 2 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:08,500 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:08,501 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:08,502 INFO L186 Difference]: Start difference. First operand has 77 places, 76 transitions, 164 flow. Second operand 2 states and 164 transitions. [2021-12-06 18:59:08,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 72 transitions, 164 flow [2021-12-06 18:59:08,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 72 transitions, 156 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-12-06 18:59:08,508 INFO L242 Difference]: Finished difference. Result has 74 places, 70 transitions, 144 flow [2021-12-06 18:59:08,510 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=144, PETRI_PLACES=74, PETRI_TRANSITIONS=70} [2021-12-06 18:59:08,513 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, -3 predicate places. [2021-12-06 18:59:08,513 INFO L470 AbstractCegarLoop]: Abstraction has has 74 places, 70 transitions, 144 flow [2021-12-06 18:59:08,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 81.0) internal successors, (162), 2 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:08,514 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 18:59:08,514 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:59:08,514 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 18:59:08,514 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 18:59:08,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:59:08,515 INFO L85 PathProgramCache]: Analyzing trace with hash 1457758209, now seen corresponding path program 1 times [2021-12-06 18:59:08,515 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:59:08,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364073821] [2021-12-06 18:59:08,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:59:08,516 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:59:08,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:59:08,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:59:08,805 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:59:08,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364073821] [2021-12-06 18:59:08,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364073821] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:59:08,806 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:59:08,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-06 18:59:08,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656147047] [2021-12-06 18:59:08,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:59:08,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-06 18:59:08,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:59:08,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-06 18:59:08,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-12-06 18:59:08,813 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2021-12-06 18:59:08,815 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 70 transitions, 144 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:08,815 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 18:59:08,815 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2021-12-06 18:59:08,815 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 18:59:09,153 INFO L129 PetriNetUnfolder]: 108/359 cut-off events. [2021-12-06 18:59:09,154 INFO L130 PetriNetUnfolder]: For 22/22 co-relation queries the response was YES. [2021-12-06 18:59:09,156 INFO L84 FinitePrefix]: Finished finitePrefix Result has 603 conditions, 359 events. 108/359 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1655 event pairs, 27 based on Foata normal form. 1/325 useless extension candidates. Maximal degree in co-relation 600. Up to 57 conditions per place. [2021-12-06 18:59:09,159 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 60 selfloop transitions, 16 changer transitions 8/125 dead transitions. [2021-12-06 18:59:09,159 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 125 transitions, 431 flow [2021-12-06 18:59:09,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 18:59:09,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-12-06 18:59:09,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 799 transitions. [2021-12-06 18:59:09,166 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6559934318555009 [2021-12-06 18:59:09,166 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 799 transitions. [2021-12-06 18:59:09,166 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 799 transitions. [2021-12-06 18:59:09,168 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 18:59:09,168 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 799 transitions. [2021-12-06 18:59:09,172 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 57.07142857142857) internal successors, (799), 14 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:09,177 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:09,178 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:09,178 INFO L186 Difference]: Start difference. First operand has 74 places, 70 transitions, 144 flow. Second operand 14 states and 799 transitions. [2021-12-06 18:59:09,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 125 transitions, 431 flow [2021-12-06 18:59:09,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 125 transitions, 431 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-06 18:59:09,184 INFO L242 Difference]: Finished difference. Result has 92 places, 82 transitions, 241 flow [2021-12-06 18:59:09,184 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=241, PETRI_PLACES=92, PETRI_TRANSITIONS=82} [2021-12-06 18:59:09,185 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 15 predicate places. [2021-12-06 18:59:09,185 INFO L470 AbstractCegarLoop]: Abstraction has has 92 places, 82 transitions, 241 flow [2021-12-06 18:59:09,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:09,186 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 18:59:09,187 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:59:09,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 18:59:09,187 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 18:59:09,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:59:09,188 INFO L85 PathProgramCache]: Analyzing trace with hash -1178946693, now seen corresponding path program 2 times [2021-12-06 18:59:09,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:59:09,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001299736] [2021-12-06 18:59:09,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:59:09,189 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:59:09,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:59:09,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:59:09,399 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:59:09,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001299736] [2021-12-06 18:59:09,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001299736] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:59:09,399 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:59:09,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-06 18:59:09,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972934595] [2021-12-06 18:59:09,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:59:09,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-06 18:59:09,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:59:09,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-06 18:59:09,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-12-06 18:59:09,402 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2021-12-06 18:59:09,403 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 82 transitions, 241 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:09,403 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 18:59:09,403 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2021-12-06 18:59:09,403 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 18:59:09,688 INFO L129 PetriNetUnfolder]: 132/371 cut-off events. [2021-12-06 18:59:09,688 INFO L130 PetriNetUnfolder]: For 147/147 co-relation queries the response was YES. [2021-12-06 18:59:09,690 INFO L84 FinitePrefix]: Finished finitePrefix Result has 891 conditions, 371 events. 132/371 cut-off events. For 147/147 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1709 event pairs, 33 based on Foata normal form. 1/363 useless extension candidates. Maximal degree in co-relation 880. Up to 103 conditions per place. [2021-12-06 18:59:09,692 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 53 selfloop transitions, 23 changer transitions 8/125 dead transitions. [2021-12-06 18:59:09,692 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 125 transitions, 561 flow [2021-12-06 18:59:09,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 18:59:09,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-12-06 18:59:09,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 794 transitions. [2021-12-06 18:59:09,695 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6518883415435139 [2021-12-06 18:59:09,695 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 794 transitions. [2021-12-06 18:59:09,695 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 794 transitions. [2021-12-06 18:59:09,696 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 18:59:09,696 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 794 transitions. [2021-12-06 18:59:09,698 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.714285714285715) internal successors, (794), 14 states have internal predecessors, (794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:09,701 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:09,701 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:09,701 INFO L186 Difference]: Start difference. First operand has 92 places, 82 transitions, 241 flow. Second operand 14 states and 794 transitions. [2021-12-06 18:59:09,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 125 transitions, 561 flow [2021-12-06 18:59:09,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 125 transitions, 545 flow, removed 5 selfloop flow, removed 6 redundant places. [2021-12-06 18:59:09,706 INFO L242 Difference]: Finished difference. Result has 102 places, 93 transitions, 362 flow [2021-12-06 18:59:09,707 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=229, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=362, PETRI_PLACES=102, PETRI_TRANSITIONS=93} [2021-12-06 18:59:09,707 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 25 predicate places. [2021-12-06 18:59:09,707 INFO L470 AbstractCegarLoop]: Abstraction has has 102 places, 93 transitions, 362 flow [2021-12-06 18:59:09,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:09,708 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 18:59:09,708 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:59:09,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-06 18:59:09,708 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 18:59:09,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:59:09,709 INFO L85 PathProgramCache]: Analyzing trace with hash 260955159, now seen corresponding path program 3 times [2021-12-06 18:59:09,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:59:09,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958560855] [2021-12-06 18:59:09,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:59:09,709 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:59:09,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:59:09,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:59:09,885 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:59:09,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958560855] [2021-12-06 18:59:09,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958560855] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:59:09,885 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:59:09,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-12-06 18:59:09,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607621139] [2021-12-06 18:59:09,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:59:09,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-06 18:59:09,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:59:09,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-06 18:59:09,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-12-06 18:59:09,888 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2021-12-06 18:59:09,888 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 93 transitions, 362 flow. Second operand has 15 states, 15 states have (on average 52.53333333333333) internal successors, (788), 15 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:09,889 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 18:59:09,889 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2021-12-06 18:59:09,889 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 18:59:10,106 INFO L129 PetriNetUnfolder]: 158/413 cut-off events. [2021-12-06 18:59:10,106 INFO L130 PetriNetUnfolder]: For 478/478 co-relation queries the response was YES. [2021-12-06 18:59:10,107 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1234 conditions, 413 events. 158/413 cut-off events. For 478/478 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1856 event pairs, 44 based on Foata normal form. 1/402 useless extension candidates. Maximal degree in co-relation 1218. Up to 117 conditions per place. [2021-12-06 18:59:10,110 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 61 selfloop transitions, 33 changer transitions 8/143 dead transitions. [2021-12-06 18:59:10,111 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 143 transitions, 828 flow [2021-12-06 18:59:10,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 18:59:10,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-12-06 18:59:10,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 790 transitions. [2021-12-06 18:59:10,113 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6486042692939245 [2021-12-06 18:59:10,113 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 790 transitions. [2021-12-06 18:59:10,113 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 790 transitions. [2021-12-06 18:59:10,114 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 18:59:10,114 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 790 transitions. [2021-12-06 18:59:10,116 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.42857142857143) internal successors, (790), 14 states have internal predecessors, (790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:10,118 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:10,118 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:10,119 INFO L186 Difference]: Start difference. First operand has 102 places, 93 transitions, 362 flow. Second operand 14 states and 790 transitions. [2021-12-06 18:59:10,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 143 transitions, 828 flow [2021-12-06 18:59:10,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 143 transitions, 763 flow, removed 10 selfloop flow, removed 9 redundant places. [2021-12-06 18:59:10,125 INFO L242 Difference]: Finished difference. Result has 110 places, 109 transitions, 547 flow [2021-12-06 18:59:10,125 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=323, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=547, PETRI_PLACES=110, PETRI_TRANSITIONS=109} [2021-12-06 18:59:10,126 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 33 predicate places. [2021-12-06 18:59:10,126 INFO L470 AbstractCegarLoop]: Abstraction has has 110 places, 109 transitions, 547 flow [2021-12-06 18:59:10,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 52.53333333333333) internal successors, (788), 15 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:10,127 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 18:59:10,127 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:59:10,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-06 18:59:10,127 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 18:59:10,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:59:10,128 INFO L85 PathProgramCache]: Analyzing trace with hash -1891949299, now seen corresponding path program 4 times [2021-12-06 18:59:10,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:59:10,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033594058] [2021-12-06 18:59:10,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:59:10,128 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:59:10,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:59:10,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:59:10,284 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:59:10,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033594058] [2021-12-06 18:59:10,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033594058] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:59:10,284 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:59:10,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-06 18:59:10,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656558855] [2021-12-06 18:59:10,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:59:10,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-06 18:59:10,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:59:10,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-06 18:59:10,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-12-06 18:59:10,286 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2021-12-06 18:59:10,287 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 109 transitions, 547 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:10,287 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 18:59:10,287 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2021-12-06 18:59:10,287 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 18:59:10,525 INFO L129 PetriNetUnfolder]: 166/461 cut-off events. [2021-12-06 18:59:10,525 INFO L130 PetriNetUnfolder]: For 829/838 co-relation queries the response was YES. [2021-12-06 18:59:10,526 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1515 conditions, 461 events. 166/461 cut-off events. For 829/838 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2169 event pairs, 38 based on Foata normal form. 7/463 useless extension candidates. Maximal degree in co-relation 1495. Up to 129 conditions per place. [2021-12-06 18:59:10,529 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 64 selfloop transitions, 38 changer transitions 8/151 dead transitions. [2021-12-06 18:59:10,529 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 151 transitions, 999 flow [2021-12-06 18:59:10,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 18:59:10,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-12-06 18:59:10,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 792 transitions. [2021-12-06 18:59:10,532 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6502463054187192 [2021-12-06 18:59:10,532 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 792 transitions. [2021-12-06 18:59:10,532 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 792 transitions. [2021-12-06 18:59:10,533 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 18:59:10,533 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 792 transitions. [2021-12-06 18:59:10,534 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.57142857142857) internal successors, (792), 14 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) [2021-12-06 18:59:10,536 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:10,537 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:10,537 INFO L186 Difference]: Start difference. First operand has 110 places, 109 transitions, 547 flow. Second operand 14 states and 792 transitions. [2021-12-06 18:59:10,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 151 transitions, 999 flow [2021-12-06 18:59:10,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 151 transitions, 930 flow, removed 20 selfloop flow, removed 8 redundant places. [2021-12-06 18:59:10,544 INFO L242 Difference]: Finished difference. Result has 117 places, 114 transitions, 657 flow [2021-12-06 18:59:10,544 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=501, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=657, PETRI_PLACES=117, PETRI_TRANSITIONS=114} [2021-12-06 18:59:10,545 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 40 predicate places. [2021-12-06 18:59:10,545 INFO L470 AbstractCegarLoop]: Abstraction has has 117 places, 114 transitions, 657 flow [2021-12-06 18:59:10,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:10,546 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 18:59:10,546 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:59:10,546 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-06 18:59:10,546 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 18:59:10,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:59:10,546 INFO L85 PathProgramCache]: Analyzing trace with hash -119401531, now seen corresponding path program 5 times [2021-12-06 18:59:10,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:59:10,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229135201] [2021-12-06 18:59:10,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:59:10,547 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:59:10,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:59:10,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:59:10,678 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:59:10,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229135201] [2021-12-06 18:59:10,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229135201] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:59:10,678 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:59:10,678 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-06 18:59:10,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855753056] [2021-12-06 18:59:10,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:59:10,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-06 18:59:10,679 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:59:10,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-06 18:59:10,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-12-06 18:59:10,680 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2021-12-06 18:59:10,681 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 114 transitions, 657 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:10,681 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 18:59:10,681 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2021-12-06 18:59:10,681 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 18:59:10,868 INFO L129 PetriNetUnfolder]: 170/473 cut-off events. [2021-12-06 18:59:10,868 INFO L130 PetriNetUnfolder]: For 999/1001 co-relation queries the response was YES. [2021-12-06 18:59:10,870 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1589 conditions, 473 events. 170/473 cut-off events. For 999/1001 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2306 event pairs, 36 based on Foata normal form. 3/472 useless extension candidates. Maximal degree in co-relation 1567. Up to 128 conditions per place. [2021-12-06 18:59:10,874 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 68 selfloop transitions, 38 changer transitions 8/155 dead transitions. [2021-12-06 18:59:10,874 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 155 transitions, 1069 flow [2021-12-06 18:59:10,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 18:59:10,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-12-06 18:59:10,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 796 transitions. [2021-12-06 18:59:10,878 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6535303776683087 [2021-12-06 18:59:10,878 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 796 transitions. [2021-12-06 18:59:10,878 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 796 transitions. [2021-12-06 18:59:10,879 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 18:59:10,879 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 796 transitions. [2021-12-06 18:59:10,881 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.857142857142854) internal successors, (796), 14 states have internal predecessors, (796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:10,884 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:10,885 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:10,885 INFO L186 Difference]: Start difference. First operand has 117 places, 114 transitions, 657 flow. Second operand 14 states and 796 transitions. [2021-12-06 18:59:10,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 155 transitions, 1069 flow [2021-12-06 18:59:10,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 155 transitions, 985 flow, removed 7 selfloop flow, removed 11 redundant places. [2021-12-06 18:59:10,894 INFO L242 Difference]: Finished difference. Result has 120 places, 115 transitions, 675 flow [2021-12-06 18:59:10,894 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=579, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=675, PETRI_PLACES=120, PETRI_TRANSITIONS=115} [2021-12-06 18:59:10,895 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 43 predicate places. [2021-12-06 18:59:10,895 INFO L470 AbstractCegarLoop]: Abstraction has has 120 places, 115 transitions, 675 flow [2021-12-06 18:59:10,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:10,896 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 18:59:10,896 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:59:10,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-06 18:59:10,896 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 18:59:10,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:59:10,897 INFO L85 PathProgramCache]: Analyzing trace with hash 18414173, now seen corresponding path program 6 times [2021-12-06 18:59:10,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:59:10,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561484579] [2021-12-06 18:59:10,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:59:10,898 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:59:10,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:59:11,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:59:11,044 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:59:11,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561484579] [2021-12-06 18:59:11,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561484579] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:59:11,044 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:59:11,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-06 18:59:11,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638573841] [2021-12-06 18:59:11,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:59:11,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-06 18:59:11,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:59:11,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-06 18:59:11,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-12-06 18:59:11,047 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2021-12-06 18:59:11,048 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 115 transitions, 675 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:11,048 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 18:59:11,048 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2021-12-06 18:59:11,048 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 18:59:11,267 INFO L129 PetriNetUnfolder]: 184/501 cut-off events. [2021-12-06 18:59:11,267 INFO L130 PetriNetUnfolder]: For 1248/1250 co-relation queries the response was YES. [2021-12-06 18:59:11,269 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1743 conditions, 501 events. 184/501 cut-off events. For 1248/1250 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2421 event pairs, 35 based on Foata normal form. 3/496 useless extension candidates. Maximal degree in co-relation 1720. Up to 143 conditions per place. [2021-12-06 18:59:11,274 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 63 selfloop transitions, 43 changer transitions 7/154 dead transitions. [2021-12-06 18:59:11,274 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 154 transitions, 1138 flow [2021-12-06 18:59:11,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 18:59:11,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-12-06 18:59:11,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 793 transitions. [2021-12-06 18:59:11,277 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6510673234811166 [2021-12-06 18:59:11,277 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 793 transitions. [2021-12-06 18:59:11,277 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 793 transitions. [2021-12-06 18:59:11,278 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 18:59:11,278 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 793 transitions. [2021-12-06 18:59:11,281 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.642857142857146) internal successors, (793), 14 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:11,284 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:11,284 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:11,284 INFO L186 Difference]: Start difference. First operand has 120 places, 115 transitions, 675 flow. Second operand 14 states and 793 transitions. [2021-12-06 18:59:11,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 154 transitions, 1138 flow [2021-12-06 18:59:11,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 154 transitions, 1024 flow, removed 8 selfloop flow, removed 12 redundant places. [2021-12-06 18:59:11,294 INFO L242 Difference]: Finished difference. Result has 124 places, 124 transitions, 817 flow [2021-12-06 18:59:11,294 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=589, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=817, PETRI_PLACES=124, PETRI_TRANSITIONS=124} [2021-12-06 18:59:11,295 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 47 predicate places. [2021-12-06 18:59:11,295 INFO L470 AbstractCegarLoop]: Abstraction has has 124 places, 124 transitions, 817 flow [2021-12-06 18:59:11,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:11,296 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 18:59:11,296 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:59:11,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-06 18:59:11,296 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 18:59:11,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:59:11,297 INFO L85 PathProgramCache]: Analyzing trace with hash 1414819111, now seen corresponding path program 7 times [2021-12-06 18:59:11,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:59:11,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536324799] [2021-12-06 18:59:11,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:59:11,298 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:59:11,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:59:11,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:59:11,444 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:59:11,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536324799] [2021-12-06 18:59:11,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536324799] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:59:11,444 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:59:11,445 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-06 18:59:11,445 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840839906] [2021-12-06 18:59:11,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:59:11,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-06 18:59:11,445 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:59:11,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-06 18:59:11,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-12-06 18:59:11,446 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2021-12-06 18:59:11,447 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 124 transitions, 817 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:11,447 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 18:59:11,447 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2021-12-06 18:59:11,447 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 18:59:11,696 INFO L129 PetriNetUnfolder]: 183/506 cut-off events. [2021-12-06 18:59:11,696 INFO L130 PetriNetUnfolder]: For 1565/1574 co-relation queries the response was YES. [2021-12-06 18:59:11,698 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1845 conditions, 506 events. 183/506 cut-off events. For 1565/1574 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2506 event pairs, 38 based on Foata normal form. 7/508 useless extension candidates. Maximal degree in co-relation 1819. Up to 142 conditions per place. [2021-12-06 18:59:11,703 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 68 selfloop transitions, 43 changer transitions 8/160 dead transitions. [2021-12-06 18:59:11,703 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 160 transitions, 1252 flow [2021-12-06 18:59:11,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 18:59:11,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-12-06 18:59:11,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 790 transitions. [2021-12-06 18:59:11,706 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6486042692939245 [2021-12-06 18:59:11,706 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 790 transitions. [2021-12-06 18:59:11,706 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 790 transitions. [2021-12-06 18:59:11,707 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 18:59:11,707 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 790 transitions. [2021-12-06 18:59:11,709 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.42857142857143) internal successors, (790), 14 states have internal predecessors, (790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:11,712 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:11,712 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:11,712 INFO L186 Difference]: Start difference. First operand has 124 places, 124 transitions, 817 flow. Second operand 14 states and 790 transitions. [2021-12-06 18:59:11,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 160 transitions, 1252 flow [2021-12-06 18:59:11,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 160 transitions, 1173 flow, removed 14 selfloop flow, removed 9 redundant places. [2021-12-06 18:59:11,723 INFO L242 Difference]: Finished difference. Result has 128 places, 122 transitions, 825 flow [2021-12-06 18:59:11,724 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=754, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=825, PETRI_PLACES=128, PETRI_TRANSITIONS=122} [2021-12-06 18:59:11,725 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 51 predicate places. [2021-12-06 18:59:11,725 INFO L470 AbstractCegarLoop]: Abstraction has has 128 places, 122 transitions, 825 flow [2021-12-06 18:59:11,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:11,725 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 18:59:11,726 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:59:11,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-06 18:59:11,726 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 18:59:11,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:59:11,726 INFO L85 PathProgramCache]: Analyzing trace with hash -658866687, now seen corresponding path program 8 times [2021-12-06 18:59:11,726 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:59:11,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727367731] [2021-12-06 18:59:11,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:59:11,727 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:59:11,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:59:11,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:59:11,863 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:59:11,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727367731] [2021-12-06 18:59:11,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727367731] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:59:11,863 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:59:11,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-06 18:59:11,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866867578] [2021-12-06 18:59:11,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:59:11,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-06 18:59:11,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:59:11,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-06 18:59:11,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-12-06 18:59:11,865 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2021-12-06 18:59:11,866 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 122 transitions, 825 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:11,866 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 18:59:11,866 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2021-12-06 18:59:11,866 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 18:59:12,129 INFO L129 PetriNetUnfolder]: 185/494 cut-off events. [2021-12-06 18:59:12,129 INFO L130 PetriNetUnfolder]: For 1663/1665 co-relation queries the response was YES. [2021-12-06 18:59:12,131 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1858 conditions, 494 events. 185/494 cut-off events. For 1663/1665 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2511 event pairs, 35 based on Foata normal form. 1/487 useless extension candidates. Maximal degree in co-relation 1832. Up to 134 conditions per place. [2021-12-06 18:59:12,136 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 66 selfloop transitions, 46 changer transitions 8/161 dead transitions. [2021-12-06 18:59:12,136 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 161 transitions, 1255 flow [2021-12-06 18:59:12,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 18:59:12,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-12-06 18:59:12,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 799 transitions. [2021-12-06 18:59:12,140 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6559934318555009 [2021-12-06 18:59:12,140 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 799 transitions. [2021-12-06 18:59:12,140 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 799 transitions. [2021-12-06 18:59:12,141 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 18:59:12,141 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 799 transitions. [2021-12-06 18:59:12,143 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 57.07142857142857) internal successors, (799), 14 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:12,146 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:12,146 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:12,146 INFO L186 Difference]: Start difference. First operand has 128 places, 122 transitions, 825 flow. Second operand 14 states and 799 transitions. [2021-12-06 18:59:12,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 161 transitions, 1255 flow [2021-12-06 18:59:12,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 161 transitions, 1155 flow, removed 6 selfloop flow, removed 12 redundant places. [2021-12-06 18:59:12,157 INFO L242 Difference]: Finished difference. Result has 129 places, 126 transitions, 892 flow [2021-12-06 18:59:12,158 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=731, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=892, PETRI_PLACES=129, PETRI_TRANSITIONS=126} [2021-12-06 18:59:12,159 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 52 predicate places. [2021-12-06 18:59:12,159 INFO L470 AbstractCegarLoop]: Abstraction has has 129 places, 126 transitions, 892 flow [2021-12-06 18:59:12,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:12,159 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 18:59:12,159 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:59:12,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-06 18:59:12,160 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 18:59:12,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:59:12,160 INFO L85 PathProgramCache]: Analyzing trace with hash -865576139, now seen corresponding path program 9 times [2021-12-06 18:59:12,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:59:12,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478941095] [2021-12-06 18:59:12,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:59:12,161 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:59:12,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:59:12,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:59:12,305 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:59:12,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478941095] [2021-12-06 18:59:12,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478941095] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:59:12,305 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:59:12,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-06 18:59:12,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546228880] [2021-12-06 18:59:12,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:59:12,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-06 18:59:12,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:59:12,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-06 18:59:12,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-12-06 18:59:12,308 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2021-12-06 18:59:12,308 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 126 transitions, 892 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:12,308 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 18:59:12,308 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2021-12-06 18:59:12,308 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 18:59:12,572 INFO L129 PetriNetUnfolder]: 187/535 cut-off events. [2021-12-06 18:59:12,572 INFO L130 PetriNetUnfolder]: For 1952/1956 co-relation queries the response was YES. [2021-12-06 18:59:12,574 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1975 conditions, 535 events. 187/535 cut-off events. For 1952/1956 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2831 event pairs, 29 based on Foata normal form. 3/533 useless extension candidates. Maximal degree in co-relation 1947. Up to 151 conditions per place. [2021-12-06 18:59:12,577 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 67 selfloop transitions, 45 changer transitions 7/160 dead transitions. [2021-12-06 18:59:12,577 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 160 transitions, 1268 flow [2021-12-06 18:59:12,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 18:59:12,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-12-06 18:59:12,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 796 transitions. [2021-12-06 18:59:12,583 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6535303776683087 [2021-12-06 18:59:12,584 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 796 transitions. [2021-12-06 18:59:12,584 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 796 transitions. [2021-12-06 18:59:12,584 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 18:59:12,584 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 796 transitions. [2021-12-06 18:59:12,585 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.857142857142854) internal successors, (796), 14 states have internal predecessors, (796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:12,587 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:12,587 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:12,587 INFO L186 Difference]: Start difference. First operand has 129 places, 126 transitions, 892 flow. Second operand 14 states and 796 transitions. [2021-12-06 18:59:12,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 160 transitions, 1268 flow [2021-12-06 18:59:12,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 160 transitions, 1175 flow, removed 11 selfloop flow, removed 10 redundant places. [2021-12-06 18:59:12,596 INFO L242 Difference]: Finished difference. Result has 133 places, 128 transitions, 920 flow [2021-12-06 18:59:12,596 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=803, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=920, PETRI_PLACES=133, PETRI_TRANSITIONS=128} [2021-12-06 18:59:12,596 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 56 predicate places. [2021-12-06 18:59:12,597 INFO L470 AbstractCegarLoop]: Abstraction has has 133 places, 128 transitions, 920 flow [2021-12-06 18:59:12,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:12,597 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 18:59:12,597 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:59:12,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-06 18:59:12,597 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 18:59:12,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:59:12,598 INFO L85 PathProgramCache]: Analyzing trace with hash 251090105, now seen corresponding path program 10 times [2021-12-06 18:59:12,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:59:12,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073725044] [2021-12-06 18:59:12,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:59:12,598 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:59:12,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:59:12,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:59:12,712 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:59:12,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073725044] [2021-12-06 18:59:12,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073725044] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:59:12,712 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:59:12,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-06 18:59:12,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305932205] [2021-12-06 18:59:12,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:59:12,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-06 18:59:12,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:59:12,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-06 18:59:12,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-12-06 18:59:12,713 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2021-12-06 18:59:12,714 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 128 transitions, 920 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:12,714 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 18:59:12,714 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2021-12-06 18:59:12,714 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 18:59:12,959 INFO L129 PetriNetUnfolder]: 186/542 cut-off events. [2021-12-06 18:59:12,959 INFO L130 PetriNetUnfolder]: For 2057/2059 co-relation queries the response was YES. [2021-12-06 18:59:12,962 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1995 conditions, 542 events. 186/542 cut-off events. For 2057/2059 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2885 event pairs, 34 based on Foata normal form. 3/537 useless extension candidates. Maximal degree in co-relation 1966. Up to 157 conditions per place. [2021-12-06 18:59:12,967 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 66 selfloop transitions, 44 changer transitions 7/158 dead transitions. [2021-12-06 18:59:12,967 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 158 transitions, 1293 flow [2021-12-06 18:59:12,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 18:59:12,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-12-06 18:59:12,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 794 transitions. [2021-12-06 18:59:12,973 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6518883415435139 [2021-12-06 18:59:12,973 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 794 transitions. [2021-12-06 18:59:12,973 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 794 transitions. [2021-12-06 18:59:12,974 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 18:59:12,974 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 794 transitions. [2021-12-06 18:59:12,976 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.714285714285715) internal successors, (794), 14 states have internal predecessors, (794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:12,978 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:12,979 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:12,979 INFO L186 Difference]: Start difference. First operand has 133 places, 128 transitions, 920 flow. Second operand 14 states and 794 transitions. [2021-12-06 18:59:12,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 158 transitions, 1293 flow [2021-12-06 18:59:12,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 158 transitions, 1187 flow, removed 9 selfloop flow, removed 12 redundant places. [2021-12-06 18:59:12,992 INFO L242 Difference]: Finished difference. Result has 135 places, 128 transitions, 925 flow [2021-12-06 18:59:12,993 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=823, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=925, PETRI_PLACES=135, PETRI_TRANSITIONS=128} [2021-12-06 18:59:12,994 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 58 predicate places. [2021-12-06 18:59:12,994 INFO L470 AbstractCegarLoop]: Abstraction has has 135 places, 128 transitions, 925 flow [2021-12-06 18:59:12,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:12,994 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 18:59:12,995 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:59:12,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-06 18:59:12,995 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 18:59:12,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:59:12,995 INFO L85 PathProgramCache]: Analyzing trace with hash -1581205593, now seen corresponding path program 11 times [2021-12-06 18:59:12,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:59:12,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937206673] [2021-12-06 18:59:12,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:59:12,996 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:59:13,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:59:13,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:59:13,109 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:59:13,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937206673] [2021-12-06 18:59:13,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937206673] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:59:13,110 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:59:13,110 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-06 18:59:13,110 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782727396] [2021-12-06 18:59:13,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:59:13,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-06 18:59:13,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:59:13,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-06 18:59:13,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-12-06 18:59:13,111 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2021-12-06 18:59:13,112 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 128 transitions, 925 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:13,112 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 18:59:13,112 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2021-12-06 18:59:13,112 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 18:59:13,329 INFO L129 PetriNetUnfolder]: 185/532 cut-off events. [2021-12-06 18:59:13,330 INFO L130 PetriNetUnfolder]: For 2012/2016 co-relation queries the response was YES. [2021-12-06 18:59:13,331 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1985 conditions, 532 events. 185/532 cut-off events. For 2012/2016 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2821 event pairs, 27 based on Foata normal form. 3/530 useless extension candidates. Maximal degree in co-relation 1955. Up to 153 conditions per place. [2021-12-06 18:59:13,335 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 65 selfloop transitions, 42 changer transitions 9/157 dead transitions. [2021-12-06 18:59:13,335 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 157 transitions, 1278 flow [2021-12-06 18:59:13,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 18:59:13,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-12-06 18:59:13,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 794 transitions. [2021-12-06 18:59:13,339 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6518883415435139 [2021-12-06 18:59:13,339 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 794 transitions. [2021-12-06 18:59:13,339 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 794 transitions. [2021-12-06 18:59:13,340 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 18:59:13,340 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 794 transitions. [2021-12-06 18:59:13,341 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.714285714285715) internal successors, (794), 14 states have internal predecessors, (794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:13,342 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:13,343 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:13,343 INFO L186 Difference]: Start difference. First operand has 135 places, 128 transitions, 925 flow. Second operand 14 states and 794 transitions. [2021-12-06 18:59:13,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 157 transitions, 1278 flow [2021-12-06 18:59:13,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 157 transitions, 1176 flow, removed 8 selfloop flow, removed 12 redundant places. [2021-12-06 18:59:13,351 INFO L242 Difference]: Finished difference. Result has 135 places, 125 transitions, 882 flow [2021-12-06 18:59:13,351 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=827, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=882, PETRI_PLACES=135, PETRI_TRANSITIONS=125} [2021-12-06 18:59:13,352 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 58 predicate places. [2021-12-06 18:59:13,352 INFO L470 AbstractCegarLoop]: Abstraction has has 135 places, 125 transitions, 882 flow [2021-12-06 18:59:13,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:13,352 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 18:59:13,352 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:59:13,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-06 18:59:13,352 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 18:59:13,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:59:13,353 INFO L85 PathProgramCache]: Analyzing trace with hash 848909437, now seen corresponding path program 12 times [2021-12-06 18:59:13,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:59:13,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285137452] [2021-12-06 18:59:13,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:59:13,353 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:59:13,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:59:13,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:59:13,473 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:59:13,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285137452] [2021-12-06 18:59:13,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285137452] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:59:13,473 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:59:13,473 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-06 18:59:13,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095248555] [2021-12-06 18:59:13,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:59:13,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-06 18:59:13,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:59:13,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-06 18:59:13,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-12-06 18:59:13,476 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2021-12-06 18:59:13,477 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 125 transitions, 882 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:13,477 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 18:59:13,477 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2021-12-06 18:59:13,477 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 18:59:13,695 INFO L129 PetriNetUnfolder]: 179/489 cut-off events. [2021-12-06 18:59:13,695 INFO L130 PetriNetUnfolder]: For 1975/1977 co-relation queries the response was YES. [2021-12-06 18:59:13,696 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1886 conditions, 489 events. 179/489 cut-off events. For 1975/1977 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2509 event pairs, 38 based on Foata normal form. 1/481 useless extension candidates. Maximal degree in co-relation 1857. Up to 143 conditions per place. [2021-12-06 18:59:13,699 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 64 selfloop transitions, 40 changer transitions 8/153 dead transitions. [2021-12-06 18:59:13,700 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 153 transitions, 1224 flow [2021-12-06 18:59:13,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 18:59:13,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-12-06 18:59:13,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 791 transitions. [2021-12-06 18:59:13,701 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6494252873563219 [2021-12-06 18:59:13,701 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 791 transitions. [2021-12-06 18:59:13,701 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 791 transitions. [2021-12-06 18:59:13,702 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 18:59:13,702 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 791 transitions. [2021-12-06 18:59:13,703 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.5) internal successors, (791), 14 states have internal predecessors, (791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:13,705 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:13,706 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:13,706 INFO L186 Difference]: Start difference. First operand has 135 places, 125 transitions, 882 flow. Second operand 14 states and 791 transitions. [2021-12-06 18:59:13,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 153 transitions, 1224 flow [2021-12-06 18:59:13,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 153 transitions, 1126 flow, removed 7 selfloop flow, removed 11 redundant places. [2021-12-06 18:59:13,722 INFO L242 Difference]: Finished difference. Result has 134 places, 122 transitions, 843 flow [2021-12-06 18:59:13,723 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=788, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=843, PETRI_PLACES=134, PETRI_TRANSITIONS=122} [2021-12-06 18:59:13,723 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 57 predicate places. [2021-12-06 18:59:13,723 INFO L470 AbstractCegarLoop]: Abstraction has has 134 places, 122 transitions, 843 flow [2021-12-06 18:59:13,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:13,724 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 18:59:13,724 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:59:13,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-06 18:59:13,725 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 18:59:13,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:59:13,725 INFO L85 PathProgramCache]: Analyzing trace with hash -1691382799, now seen corresponding path program 13 times [2021-12-06 18:59:13,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:59:13,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522788357] [2021-12-06 18:59:13,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:59:13,726 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:59:13,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:59:13,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:59:13,861 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:59:13,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522788357] [2021-12-06 18:59:13,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522788357] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:59:13,861 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:59:13,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-06 18:59:13,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679332587] [2021-12-06 18:59:13,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:59:13,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-06 18:59:13,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:59:13,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-06 18:59:13,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-12-06 18:59:13,863 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2021-12-06 18:59:13,864 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 122 transitions, 843 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:13,864 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 18:59:13,864 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2021-12-06 18:59:13,865 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 18:59:14,099 INFO L129 PetriNetUnfolder]: 179/485 cut-off events. [2021-12-06 18:59:14,100 INFO L130 PetriNetUnfolder]: For 1903/1905 co-relation queries the response was YES. [2021-12-06 18:59:14,101 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1859 conditions, 485 events. 179/485 cut-off events. For 1903/1905 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2422 event pairs, 45 based on Foata normal form. 1/475 useless extension candidates. Maximal degree in co-relation 1830. Up to 142 conditions per place. [2021-12-06 18:59:14,104 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 63 selfloop transitions, 42 changer transitions 8/154 dead transitions. [2021-12-06 18:59:14,104 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 154 transitions, 1228 flow [2021-12-06 18:59:14,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 18:59:14,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-12-06 18:59:14,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 793 transitions. [2021-12-06 18:59:14,106 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6510673234811166 [2021-12-06 18:59:14,106 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 793 transitions. [2021-12-06 18:59:14,106 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 793 transitions. [2021-12-06 18:59:14,106 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 18:59:14,106 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 793 transitions. [2021-12-06 18:59:14,107 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.642857142857146) internal successors, (793), 14 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:14,109 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:14,109 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:14,109 INFO L186 Difference]: Start difference. First operand has 134 places, 122 transitions, 843 flow. Second operand 14 states and 793 transitions. [2021-12-06 18:59:14,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 154 transitions, 1228 flow [2021-12-06 18:59:14,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 154 transitions, 1132 flow, removed 6 selfloop flow, removed 11 redundant places. [2021-12-06 18:59:14,123 INFO L242 Difference]: Finished difference. Result has 136 places, 124 transitions, 888 flow [2021-12-06 18:59:14,123 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=755, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=888, PETRI_PLACES=136, PETRI_TRANSITIONS=124} [2021-12-06 18:59:14,124 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 59 predicate places. [2021-12-06 18:59:14,124 INFO L470 AbstractCegarLoop]: Abstraction has has 136 places, 124 transitions, 888 flow [2021-12-06 18:59:14,124 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:14,124 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 18:59:14,125 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:59:14,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-06 18:59:14,125 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 18:59:14,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:59:14,125 INFO L85 PathProgramCache]: Analyzing trace with hash 2114028907, now seen corresponding path program 14 times [2021-12-06 18:59:14,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:59:14,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764908194] [2021-12-06 18:59:14,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:59:14,126 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:59:14,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:59:14,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:59:14,255 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:59:14,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764908194] [2021-12-06 18:59:14,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764908194] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:59:14,255 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:59:14,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-06 18:59:14,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366983760] [2021-12-06 18:59:14,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:59:14,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-06 18:59:14,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:59:14,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-06 18:59:14,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-12-06 18:59:14,257 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2021-12-06 18:59:14,258 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 124 transitions, 888 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:14,258 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 18:59:14,258 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2021-12-06 18:59:14,258 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 18:59:14,472 INFO L129 PetriNetUnfolder]: 184/545 cut-off events. [2021-12-06 18:59:14,472 INFO L130 PetriNetUnfolder]: For 1989/1993 co-relation queries the response was YES. [2021-12-06 18:59:14,474 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2003 conditions, 545 events. 184/545 cut-off events. For 1989/1993 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2911 event pairs, 41 based on Foata normal form. 3/540 useless extension candidates. Maximal degree in co-relation 1971. Up to 131 conditions per place. [2021-12-06 18:59:14,477 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 75 selfloop transitions, 40 changer transitions 7/163 dead transitions. [2021-12-06 18:59:14,477 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 163 transitions, 1319 flow [2021-12-06 18:59:14,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 18:59:14,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-12-06 18:59:14,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 793 transitions. [2021-12-06 18:59:14,478 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6510673234811166 [2021-12-06 18:59:14,478 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 793 transitions. [2021-12-06 18:59:14,479 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 793 transitions. [2021-12-06 18:59:14,479 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 18:59:14,479 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 793 transitions. [2021-12-06 18:59:14,480 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.642857142857146) internal successors, (793), 14 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:14,481 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:14,482 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:14,482 INFO L186 Difference]: Start difference. First operand has 136 places, 124 transitions, 888 flow. Second operand 14 states and 793 transitions. [2021-12-06 18:59:14,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 163 transitions, 1319 flow [2021-12-06 18:59:14,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 163 transitions, 1242 flow, removed 7 selfloop flow, removed 10 redundant places. [2021-12-06 18:59:14,494 INFO L242 Difference]: Finished difference. Result has 141 places, 127 transitions, 937 flow [2021-12-06 18:59:14,495 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=815, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=937, PETRI_PLACES=141, PETRI_TRANSITIONS=127} [2021-12-06 18:59:14,495 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 64 predicate places. [2021-12-06 18:59:14,495 INFO L470 AbstractCegarLoop]: Abstraction has has 141 places, 127 transitions, 937 flow [2021-12-06 18:59:14,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:14,496 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 18:59:14,496 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:59:14,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-06 18:59:14,496 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 18:59:14,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:59:14,496 INFO L85 PathProgramCache]: Analyzing trace with hash -1376125007, now seen corresponding path program 15 times [2021-12-06 18:59:14,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:59:14,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292999343] [2021-12-06 18:59:14,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:59:14,497 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:59:14,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:59:14,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:59:14,622 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:59:14,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292999343] [2021-12-06 18:59:14,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292999343] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:59:14,623 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:59:14,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-06 18:59:14,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702998812] [2021-12-06 18:59:14,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:59:14,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-06 18:59:14,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:59:14,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-06 18:59:14,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-12-06 18:59:14,625 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2021-12-06 18:59:14,626 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 127 transitions, 937 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:14,626 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 18:59:14,626 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2021-12-06 18:59:14,626 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 18:59:14,856 INFO L129 PetriNetUnfolder]: 180/523 cut-off events. [2021-12-06 18:59:14,856 INFO L130 PetriNetUnfolder]: For 2055/2057 co-relation queries the response was YES. [2021-12-06 18:59:14,859 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1996 conditions, 523 events. 180/523 cut-off events. For 2055/2057 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2835 event pairs, 49 based on Foata normal form. 1/513 useless extension candidates. Maximal degree in co-relation 1962. Up to 152 conditions per place. [2021-12-06 18:59:14,863 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 73 selfloop transitions, 41 changer transitions 7/162 dead transitions. [2021-12-06 18:59:14,863 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 162 transitions, 1364 flow [2021-12-06 18:59:14,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 18:59:14,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-12-06 18:59:14,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 792 transitions. [2021-12-06 18:59:14,865 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6502463054187192 [2021-12-06 18:59:14,865 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 792 transitions. [2021-12-06 18:59:14,865 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 792 transitions. [2021-12-06 18:59:14,866 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 18:59:14,866 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 792 transitions. [2021-12-06 18:59:14,867 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.57142857142857) internal successors, (792), 14 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) [2021-12-06 18:59:14,869 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:14,870 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:14,870 INFO L186 Difference]: Start difference. First operand has 141 places, 127 transitions, 937 flow. Second operand 14 states and 792 transitions. [2021-12-06 18:59:14,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 162 transitions, 1364 flow [2021-12-06 18:59:14,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 162 transitions, 1272 flow, removed 11 selfloop flow, removed 11 redundant places. [2021-12-06 18:59:14,887 INFO L242 Difference]: Finished difference. Result has 144 places, 129 transitions, 967 flow [2021-12-06 18:59:14,887 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=855, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=967, PETRI_PLACES=144, PETRI_TRANSITIONS=129} [2021-12-06 18:59:14,887 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 67 predicate places. [2021-12-06 18:59:14,887 INFO L470 AbstractCegarLoop]: Abstraction has has 144 places, 129 transitions, 967 flow [2021-12-06 18:59:14,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:14,889 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 18:59:14,889 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:59:14,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-06 18:59:14,889 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 18:59:14,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:59:14,889 INFO L85 PathProgramCache]: Analyzing trace with hash 145257315, now seen corresponding path program 16 times [2021-12-06 18:59:14,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:59:14,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566889988] [2021-12-06 18:59:14,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:59:14,890 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:59:14,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:59:15,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:59:15,017 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:59:15,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566889988] [2021-12-06 18:59:15,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566889988] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:59:15,017 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:59:15,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-06 18:59:15,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446956568] [2021-12-06 18:59:15,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:59:15,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-06 18:59:15,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:59:15,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-06 18:59:15,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-12-06 18:59:15,019 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2021-12-06 18:59:15,020 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 129 transitions, 967 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:15,020 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 18:59:15,020 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2021-12-06 18:59:15,020 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 18:59:15,253 INFO L129 PetriNetUnfolder]: 179/519 cut-off events. [2021-12-06 18:59:15,253 INFO L130 PetriNetUnfolder]: For 2130/2132 co-relation queries the response was YES. [2021-12-06 18:59:15,254 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2018 conditions, 519 events. 179/519 cut-off events. For 2130/2132 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2810 event pairs, 51 based on Foata normal form. 1/508 useless extension candidates. Maximal degree in co-relation 1983. Up to 156 conditions per place. [2021-12-06 18:59:15,262 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 71 selfloop transitions, 38 changer transitions 8/158 dead transitions. [2021-12-06 18:59:15,262 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 158 transitions, 1356 flow [2021-12-06 18:59:15,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 18:59:15,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-12-06 18:59:15,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 788 transitions. [2021-12-06 18:59:15,263 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6469622331691297 [2021-12-06 18:59:15,263 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 788 transitions. [2021-12-06 18:59:15,263 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 788 transitions. [2021-12-06 18:59:15,264 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 18:59:15,264 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 788 transitions. [2021-12-06 18:59:15,265 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.285714285714285) internal successors, (788), 14 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:15,266 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:15,266 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:15,266 INFO L186 Difference]: Start difference. First operand has 144 places, 129 transitions, 967 flow. Second operand 14 states and 788 transitions. [2021-12-06 18:59:15,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 158 transitions, 1356 flow [2021-12-06 18:59:15,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 158 transitions, 1260 flow, removed 9 selfloop flow, removed 12 redundant places. [2021-12-06 18:59:15,274 INFO L242 Difference]: Finished difference. Result has 144 places, 126 transitions, 922 flow [2021-12-06 18:59:15,275 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=875, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=922, PETRI_PLACES=144, PETRI_TRANSITIONS=126} [2021-12-06 18:59:15,275 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 67 predicate places. [2021-12-06 18:59:15,275 INFO L470 AbstractCegarLoop]: Abstraction has has 144 places, 126 transitions, 922 flow [2021-12-06 18:59:15,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:15,275 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 18:59:15,276 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:59:15,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-06 18:59:15,276 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 18:59:15,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:59:15,276 INFO L85 PathProgramCache]: Analyzing trace with hash -730886041, now seen corresponding path program 17 times [2021-12-06 18:59:15,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:59:15,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575405215] [2021-12-06 18:59:15,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:59:15,277 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:59:15,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:59:15,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:59:15,387 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:59:15,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575405215] [2021-12-06 18:59:15,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575405215] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:59:15,388 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:59:15,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-06 18:59:15,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117009712] [2021-12-06 18:59:15,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:59:15,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-06 18:59:15,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:59:15,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-06 18:59:15,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-12-06 18:59:15,389 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2021-12-06 18:59:15,390 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 126 transitions, 922 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:15,390 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 18:59:15,390 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2021-12-06 18:59:15,390 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 18:59:15,615 INFO L129 PetriNetUnfolder]: 186/568 cut-off events. [2021-12-06 18:59:15,615 INFO L130 PetriNetUnfolder]: For 2207/2211 co-relation queries the response was YES. [2021-12-06 18:59:15,617 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2101 conditions, 568 events. 186/568 cut-off events. For 2207/2211 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 3211 event pairs, 39 based on Foata normal form. 3/563 useless extension candidates. Maximal degree in co-relation 2067. Up to 159 conditions per place. [2021-12-06 18:59:15,620 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 71 selfloop transitions, 41 changer transitions 8/161 dead transitions. [2021-12-06 18:59:15,620 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 161 transitions, 1331 flow [2021-12-06 18:59:15,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 18:59:15,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-12-06 18:59:15,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 797 transitions. [2021-12-06 18:59:15,621 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6543513957307061 [2021-12-06 18:59:15,621 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 797 transitions. [2021-12-06 18:59:15,621 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 797 transitions. [2021-12-06 18:59:15,621 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 18:59:15,621 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 797 transitions. [2021-12-06 18:59:15,622 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.92857142857143) internal successors, (797), 14 states have internal predecessors, (797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:15,623 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:15,623 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:15,624 INFO L186 Difference]: Start difference. First operand has 144 places, 126 transitions, 922 flow. Second operand 14 states and 797 transitions. [2021-12-06 18:59:15,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 161 transitions, 1331 flow [2021-12-06 18:59:15,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 161 transitions, 1243 flow, removed 6 selfloop flow, removed 11 redundant places. [2021-12-06 18:59:15,631 INFO L242 Difference]: Finished difference. Result has 145 places, 128 transitions, 953 flow [2021-12-06 18:59:15,631 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=838, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=953, PETRI_PLACES=145, PETRI_TRANSITIONS=128} [2021-12-06 18:59:15,632 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 68 predicate places. [2021-12-06 18:59:15,632 INFO L470 AbstractCegarLoop]: Abstraction has has 145 places, 128 transitions, 953 flow [2021-12-06 18:59:15,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:15,632 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 18:59:15,632 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:59:15,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-06 18:59:15,633 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 18:59:15,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:59:15,633 INFO L85 PathProgramCache]: Analyzing trace with hash -1557368149, now seen corresponding path program 18 times [2021-12-06 18:59:15,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:59:15,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706176505] [2021-12-06 18:59:15,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:59:15,633 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:59:15,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:59:15,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:59:15,749 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:59:15,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706176505] [2021-12-06 18:59:15,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706176505] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:59:15,749 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:59:15,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-06 18:59:15,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605917374] [2021-12-06 18:59:15,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:59:15,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-06 18:59:15,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:59:15,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-06 18:59:15,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-12-06 18:59:15,751 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2021-12-06 18:59:15,751 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 128 transitions, 953 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:15,751 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 18:59:15,751 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2021-12-06 18:59:15,751 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 18:59:15,956 INFO L129 PetriNetUnfolder]: 181/530 cut-off events. [2021-12-06 18:59:15,956 INFO L130 PetriNetUnfolder]: For 2310/2312 co-relation queries the response was YES. [2021-12-06 18:59:15,958 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2061 conditions, 530 events. 181/530 cut-off events. For 2310/2312 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2924 event pairs, 49 based on Foata normal form. 1/519 useless extension candidates. Maximal degree in co-relation 2025. Up to 166 conditions per place. [2021-12-06 18:59:15,961 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 69 selfloop transitions, 38 changer transitions 8/156 dead transitions. [2021-12-06 18:59:15,961 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 156 transitions, 1316 flow [2021-12-06 18:59:15,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 18:59:15,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-12-06 18:59:15,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 790 transitions. [2021-12-06 18:59:15,962 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6486042692939245 [2021-12-06 18:59:15,962 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 790 transitions. [2021-12-06 18:59:15,962 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 790 transitions. [2021-12-06 18:59:15,963 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 18:59:15,963 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 790 transitions. [2021-12-06 18:59:15,963 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.42857142857143) internal successors, (790), 14 states have internal predecessors, (790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:15,964 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:15,965 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:15,965 INFO L186 Difference]: Start difference. First operand has 145 places, 128 transitions, 953 flow. Second operand 14 states and 790 transitions. [2021-12-06 18:59:15,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 156 transitions, 1316 flow [2021-12-06 18:59:15,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 156 transitions, 1218 flow, removed 10 selfloop flow, removed 12 redundant places. [2021-12-06 18:59:15,973 INFO L242 Difference]: Finished difference. Result has 146 places, 126 transitions, 916 flow [2021-12-06 18:59:15,973 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=859, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=916, PETRI_PLACES=146, PETRI_TRANSITIONS=126} [2021-12-06 18:59:15,973 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 69 predicate places. [2021-12-06 18:59:15,973 INFO L470 AbstractCegarLoop]: Abstraction has has 146 places, 126 transitions, 916 flow [2021-12-06 18:59:15,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:15,973 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 18:59:15,973 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:59:15,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-06 18:59:15,974 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 18:59:15,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:59:15,974 INFO L85 PathProgramCache]: Analyzing trace with hash 134112017, now seen corresponding path program 19 times [2021-12-06 18:59:15,974 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:59:15,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753173989] [2021-12-06 18:59:15,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:59:15,974 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:59:15,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:59:16,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:59:16,096 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:59:16,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753173989] [2021-12-06 18:59:16,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753173989] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:59:16,096 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:59:16,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-12-06 18:59:16,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747376626] [2021-12-06 18:59:16,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:59:16,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-06 18:59:16,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:59:16,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-06 18:59:16,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-12-06 18:59:16,098 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2021-12-06 18:59:16,098 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 126 transitions, 916 flow. Second operand has 15 states, 15 states have (on average 52.53333333333333) internal successors, (788), 15 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:16,098 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 18:59:16,098 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2021-12-06 18:59:16,099 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 18:59:16,345 INFO L129 PetriNetUnfolder]: 180/525 cut-off events. [2021-12-06 18:59:16,345 INFO L130 PetriNetUnfolder]: For 2241/2243 co-relation queries the response was YES. [2021-12-06 18:59:16,347 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2030 conditions, 525 events. 180/525 cut-off events. For 2241/2243 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2874 event pairs, 46 based on Foata normal form. 1/515 useless extension candidates. Maximal degree in co-relation 1994. Up to 162 conditions per place. [2021-12-06 18:59:16,350 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 68 selfloop transitions, 36 changer transitions 9/154 dead transitions. [2021-12-06 18:59:16,350 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 154 transitions, 1274 flow [2021-12-06 18:59:16,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 18:59:16,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-12-06 18:59:16,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 792 transitions. [2021-12-06 18:59:16,352 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6502463054187192 [2021-12-06 18:59:16,352 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 792 transitions. [2021-12-06 18:59:16,352 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 792 transitions. [2021-12-06 18:59:16,352 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 18:59:16,352 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 792 transitions. [2021-12-06 18:59:16,353 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.57142857142857) internal successors, (792), 14 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) [2021-12-06 18:59:16,354 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:16,354 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:16,354 INFO L186 Difference]: Start difference. First operand has 146 places, 126 transitions, 916 flow. Second operand 14 states and 792 transitions. [2021-12-06 18:59:16,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 154 transitions, 1274 flow [2021-12-06 18:59:16,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 154 transitions, 1186 flow, removed 6 selfloop flow, removed 12 redundant places. [2021-12-06 18:59:16,363 INFO L242 Difference]: Finished difference. Result has 144 places, 123 transitions, 875 flow [2021-12-06 18:59:16,363 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=832, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=875, PETRI_PLACES=144, PETRI_TRANSITIONS=123} [2021-12-06 18:59:16,364 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 67 predicate places. [2021-12-06 18:59:16,364 INFO L470 AbstractCegarLoop]: Abstraction has has 144 places, 123 transitions, 875 flow [2021-12-06 18:59:16,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 52.53333333333333) internal successors, (788), 15 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:16,364 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 18:59:16,364 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:59:16,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-06 18:59:16,364 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 18:59:16,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:59:16,365 INFO L85 PathProgramCache]: Analyzing trace with hash 386002791, now seen corresponding path program 20 times [2021-12-06 18:59:16,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:59:16,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932485187] [2021-12-06 18:59:16,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:59:16,365 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:59:16,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:59:16,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:59:16,479 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:59:16,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932485187] [2021-12-06 18:59:16,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932485187] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:59:16,479 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:59:16,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-06 18:59:16,479 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239779005] [2021-12-06 18:59:16,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:59:16,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-06 18:59:16,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:59:16,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-06 18:59:16,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-12-06 18:59:16,481 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2021-12-06 18:59:16,482 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 123 transitions, 875 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:16,482 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 18:59:16,482 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2021-12-06 18:59:16,482 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 18:59:16,711 INFO L129 PetriNetUnfolder]: 180/555 cut-off events. [2021-12-06 18:59:16,711 INFO L130 PetriNetUnfolder]: For 2292/2296 co-relation queries the response was YES. [2021-12-06 18:59:16,713 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2057 conditions, 555 events. 180/555 cut-off events. For 2292/2296 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 3080 event pairs, 38 based on Foata normal form. 3/549 useless extension candidates. Maximal degree in co-relation 2022. Up to 162 conditions per place. [2021-12-06 18:59:16,716 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 70 selfloop transitions, 37 changer transitions 7/155 dead transitions. [2021-12-06 18:59:16,716 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 155 transitions, 1262 flow [2021-12-06 18:59:16,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 18:59:16,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-12-06 18:59:16,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 793 transitions. [2021-12-06 18:59:16,717 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6510673234811166 [2021-12-06 18:59:16,717 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 793 transitions. [2021-12-06 18:59:16,717 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 793 transitions. [2021-12-06 18:59:16,717 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 18:59:16,717 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 793 transitions. [2021-12-06 18:59:16,718 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.642857142857146) internal successors, (793), 14 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:16,719 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:16,719 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:16,719 INFO L186 Difference]: Start difference. First operand has 144 places, 123 transitions, 875 flow. Second operand 14 states and 793 transitions. [2021-12-06 18:59:16,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 155 transitions, 1262 flow [2021-12-06 18:59:16,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 155 transitions, 1178 flow, removed 6 selfloop flow, removed 11 redundant places. [2021-12-06 18:59:16,727 INFO L242 Difference]: Finished difference. Result has 145 places, 124 transitions, 893 flow [2021-12-06 18:59:16,727 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=795, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=893, PETRI_PLACES=145, PETRI_TRANSITIONS=124} [2021-12-06 18:59:16,727 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 68 predicate places. [2021-12-06 18:59:16,728 INFO L470 AbstractCegarLoop]: Abstraction has has 145 places, 124 transitions, 893 flow [2021-12-06 18:59:16,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:16,728 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 18:59:16,728 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:59:16,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-06 18:59:16,728 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 18:59:16,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:59:16,729 INFO L85 PathProgramCache]: Analyzing trace with hash 567668941, now seen corresponding path program 1 times [2021-12-06 18:59:16,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:59:16,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199240352] [2021-12-06 18:59:16,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:59:16,729 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:59:16,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:59:16,750 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:59:16,750 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:59:16,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199240352] [2021-12-06 18:59:16,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199240352] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:59:16,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843044880] [2021-12-06 18:59:16,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:59:16,750 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:59:16,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:59:16,751 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:59:16,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 18:59:16,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:59:16,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 18:59:16,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:59:16,888 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:59:16,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:59:16,970 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:59:16,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843044880] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-06 18:59:16,970 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-06 18:59:16,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 6 [2021-12-06 18:59:16,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340398865] [2021-12-06 18:59:16,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:59:16,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 18:59:16,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:59:16,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 18:59:16,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-06 18:59:16,972 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2021-12-06 18:59:16,972 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 124 transitions, 893 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:16,972 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 18:59:16,972 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2021-12-06 18:59:16,973 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 18:59:17,091 INFO L129 PetriNetUnfolder]: 187/534 cut-off events. [2021-12-06 18:59:17,091 INFO L130 PetriNetUnfolder]: For 2719/2719 co-relation queries the response was YES. [2021-12-06 18:59:17,093 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2086 conditions, 534 events. 187/534 cut-off events. For 2719/2719 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2798 event pairs, 18 based on Foata normal form. 7/535 useless extension candidates. Maximal degree in co-relation 2049. Up to 157 conditions per place. [2021-12-06 18:59:17,097 INFO L132 encePairwiseOnDemand]: 79/87 looper letters, 90 selfloop transitions, 35 changer transitions 0/174 dead transitions. [2021-12-06 18:59:17,097 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 174 transitions, 1654 flow [2021-12-06 18:59:17,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 18:59:17,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-06 18:59:17,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 481 transitions. [2021-12-06 18:59:17,098 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7898193760262726 [2021-12-06 18:59:17,098 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 481 transitions. [2021-12-06 18:59:17,098 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 481 transitions. [2021-12-06 18:59:17,098 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 18:59:17,098 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 481 transitions. [2021-12-06 18:59:17,099 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 68.71428571428571) internal successors, (481), 7 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:17,100 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 87.0) internal successors, (696), 8 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:17,100 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 87.0) internal successors, (696), 8 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:17,100 INFO L186 Difference]: Start difference. First operand has 145 places, 124 transitions, 893 flow. Second operand 7 states and 481 transitions. [2021-12-06 18:59:17,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 174 transitions, 1654 flow [2021-12-06 18:59:17,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 174 transitions, 1531 flow, removed 8 selfloop flow, removed 12 redundant places. [2021-12-06 18:59:17,111 INFO L242 Difference]: Finished difference. Result has 137 places, 139 transitions, 1057 flow [2021-12-06 18:59:17,111 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=805, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1057, PETRI_PLACES=137, PETRI_TRANSITIONS=139} [2021-12-06 18:59:17,111 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 60 predicate places. [2021-12-06 18:59:17,111 INFO L470 AbstractCegarLoop]: Abstraction has has 137 places, 139 transitions, 1057 flow [2021-12-06 18:59:17,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:17,112 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 18:59:17,112 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:59:17,133 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 18:59:17,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-12-06 18:59:17,313 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 18:59:17,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:59:17,314 INFO L85 PathProgramCache]: Analyzing trace with hash -1340551103, now seen corresponding path program 2 times [2021-12-06 18:59:17,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:59:17,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339570094] [2021-12-06 18:59:17,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:59:17,314 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:59:17,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:59:17,344 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:59:17,344 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:59:17,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339570094] [2021-12-06 18:59:17,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339570094] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:59:17,345 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:59:17,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 18:59:17,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308206663] [2021-12-06 18:59:17,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:59:17,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 18:59:17,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:59:17,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 18:59:17,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 18:59:17,347 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2021-12-06 18:59:17,347 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 139 transitions, 1057 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:17,347 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 18:59:17,347 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2021-12-06 18:59:17,347 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 18:59:17,477 INFO L129 PetriNetUnfolder]: 201/624 cut-off events. [2021-12-06 18:59:17,477 INFO L130 PetriNetUnfolder]: For 3046/3051 co-relation queries the response was YES. [2021-12-06 18:59:17,479 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2408 conditions, 624 events. 201/624 cut-off events. For 3046/3051 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 3488 event pairs, 44 based on Foata normal form. 5/623 useless extension candidates. Maximal degree in co-relation 2373. Up to 132 conditions per place. [2021-12-06 18:59:17,482 INFO L132 encePairwiseOnDemand]: 81/87 looper letters, 101 selfloop transitions, 35 changer transitions 5/190 dead transitions. [2021-12-06 18:59:17,482 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 190 transitions, 1803 flow [2021-12-06 18:59:17,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 18:59:17,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-06 18:59:17,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 486 transitions. [2021-12-06 18:59:17,483 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7980295566502463 [2021-12-06 18:59:17,483 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 486 transitions. [2021-12-06 18:59:17,483 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 486 transitions. [2021-12-06 18:59:17,484 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 18:59:17,484 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 486 transitions. [2021-12-06 18:59:17,484 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 69.42857142857143) internal successors, (486), 7 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:17,485 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 87.0) internal successors, (696), 8 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:17,485 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 87.0) internal successors, (696), 8 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:17,485 INFO L186 Difference]: Start difference. First operand has 137 places, 139 transitions, 1057 flow. Second operand 7 states and 486 transitions. [2021-12-06 18:59:17,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 190 transitions, 1803 flow [2021-12-06 18:59:17,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 190 transitions, 1721 flow, removed 41 selfloop flow, removed 0 redundant places. [2021-12-06 18:59:17,499 INFO L242 Difference]: Finished difference. Result has 146 places, 147 transitions, 1246 flow [2021-12-06 18:59:17,500 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=991, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1246, PETRI_PLACES=146, PETRI_TRANSITIONS=147} [2021-12-06 18:59:17,500 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 69 predicate places. [2021-12-06 18:59:17,500 INFO L470 AbstractCegarLoop]: Abstraction has has 146 places, 147 transitions, 1246 flow [2021-12-06 18:59:17,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:17,500 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 18:59:17,501 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:59:17,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-06 18:59:17,501 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 18:59:17,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:59:17,501 INFO L85 PathProgramCache]: Analyzing trace with hash -404474333, now seen corresponding path program 1 times [2021-12-06 18:59:17,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:59:17,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232687370] [2021-12-06 18:59:17,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:59:17,501 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:59:17,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:59:17,521 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:59:17,521 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:59:17,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232687370] [2021-12-06 18:59:17,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232687370] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:59:17,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115370973] [2021-12-06 18:59:17,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:59:17,522 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:59:17,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:59:17,522 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:59:17,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 18:59:17,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:59:17,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 18:59:17,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:59:17,624 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:59:17,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:59:17,683 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:59:17,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115370973] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-06 18:59:17,684 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-06 18:59:17,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 6 [2021-12-06 18:59:17,684 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425350697] [2021-12-06 18:59:17,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:59:17,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 18:59:17,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:59:17,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 18:59:17,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-06 18:59:17,685 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2021-12-06 18:59:17,685 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 147 transitions, 1246 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:17,685 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 18:59:17,685 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2021-12-06 18:59:17,685 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 18:59:17,777 INFO L129 PetriNetUnfolder]: 204/587 cut-off events. [2021-12-06 18:59:17,777 INFO L130 PetriNetUnfolder]: For 3699/3703 co-relation queries the response was YES. [2021-12-06 18:59:17,779 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2427 conditions, 587 events. 204/587 cut-off events. For 3699/3703 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 3069 event pairs, 25 based on Foata normal form. 10/590 useless extension candidates. Maximal degree in co-relation 2388. Up to 171 conditions per place. [2021-12-06 18:59:17,785 INFO L132 encePairwiseOnDemand]: 79/87 looper letters, 108 selfloop transitions, 41 changer transitions 0/198 dead transitions. [2021-12-06 18:59:17,786 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 198 transitions, 2032 flow [2021-12-06 18:59:17,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 18:59:17,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-06 18:59:17,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 483 transitions. [2021-12-06 18:59:17,787 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7931034482758621 [2021-12-06 18:59:17,787 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 483 transitions. [2021-12-06 18:59:17,787 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 483 transitions. [2021-12-06 18:59:17,787 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 18:59:17,787 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 483 transitions. [2021-12-06 18:59:17,787 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 69.0) internal successors, (483), 7 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:17,788 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 87.0) internal successors, (696), 8 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:17,788 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 87.0) internal successors, (696), 8 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:17,788 INFO L186 Difference]: Start difference. First operand has 146 places, 147 transitions, 1246 flow. Second operand 7 states and 483 transitions. [2021-12-06 18:59:17,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 198 transitions, 2032 flow [2021-12-06 18:59:17,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 198 transitions, 1924 flow, removed 37 selfloop flow, removed 8 redundant places. [2021-12-06 18:59:17,799 INFO L242 Difference]: Finished difference. Result has 144 places, 161 transitions, 1428 flow [2021-12-06 18:59:17,799 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=1146, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1428, PETRI_PLACES=144, PETRI_TRANSITIONS=161} [2021-12-06 18:59:17,800 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 67 predicate places. [2021-12-06 18:59:17,800 INFO L470 AbstractCegarLoop]: Abstraction has has 144 places, 161 transitions, 1428 flow [2021-12-06 18:59:17,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:17,800 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 18:59:17,800 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:59:17,819 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 18:59:18,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-12-06 18:59:18,002 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 18:59:18,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:59:18,003 INFO L85 PathProgramCache]: Analyzing trace with hash -1480469883, now seen corresponding path program 3 times [2021-12-06 18:59:18,003 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:59:18,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042342398] [2021-12-06 18:59:18,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:59:18,004 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:59:18,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:59:18,094 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:59:18,094 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:59:18,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042342398] [2021-12-06 18:59:18,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042342398] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:59:18,095 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:59:18,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 18:59:18,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036449057] [2021-12-06 18:59:18,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:59:18,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 18:59:18,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:59:18,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 18:59:18,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 18:59:18,099 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2021-12-06 18:59:18,100 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 161 transitions, 1428 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:18,101 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 18:59:18,101 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2021-12-06 18:59:18,101 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 18:59:18,257 INFO L129 PetriNetUnfolder]: 225/681 cut-off events. [2021-12-06 18:59:18,257 INFO L130 PetriNetUnfolder]: For 4373/4377 co-relation queries the response was YES. [2021-12-06 18:59:18,259 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2858 conditions, 681 events. 225/681 cut-off events. For 4373/4377 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 3919 event pairs, 52 based on Foata normal form. 7/679 useless extension candidates. Maximal degree in co-relation 2823. Up to 167 conditions per place. [2021-12-06 18:59:18,262 INFO L132 encePairwiseOnDemand]: 79/87 looper letters, 119 selfloop transitions, 62 changer transitions 0/230 dead transitions. [2021-12-06 18:59:18,262 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 230 transitions, 2429 flow [2021-12-06 18:59:18,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 18:59:18,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-12-06 18:59:18,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 566 transitions. [2021-12-06 18:59:18,263 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8132183908045977 [2021-12-06 18:59:18,264 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 566 transitions. [2021-12-06 18:59:18,264 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 566 transitions. [2021-12-06 18:59:18,264 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 18:59:18,264 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 566 transitions. [2021-12-06 18:59:18,264 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 70.75) internal successors, (566), 8 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:18,265 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 87.0) internal successors, (783), 9 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:18,265 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 87.0) internal successors, (783), 9 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:18,265 INFO L186 Difference]: Start difference. First operand has 144 places, 161 transitions, 1428 flow. Second operand 8 states and 566 transitions. [2021-12-06 18:59:18,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 230 transitions, 2429 flow [2021-12-06 18:59:18,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 230 transitions, 2393 flow, removed 13 selfloop flow, removed 1 redundant places. [2021-12-06 18:59:18,280 INFO L242 Difference]: Finished difference. Result has 155 places, 180 transitions, 1877 flow [2021-12-06 18:59:18,280 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=1407, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1877, PETRI_PLACES=155, PETRI_TRANSITIONS=180} [2021-12-06 18:59:18,280 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 78 predicate places. [2021-12-06 18:59:18,280 INFO L470 AbstractCegarLoop]: Abstraction has has 155 places, 180 transitions, 1877 flow [2021-12-06 18:59:18,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:18,280 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 18:59:18,280 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:59:18,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-06 18:59:18,281 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 18:59:18,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:59:18,283 INFO L85 PathProgramCache]: Analyzing trace with hash 1581789521, now seen corresponding path program 2 times [2021-12-06 18:59:18,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:59:18,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469697542] [2021-12-06 18:59:18,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:59:18,283 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:59:18,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:59:18,307 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:59:18,307 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:59:18,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469697542] [2021-12-06 18:59:18,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469697542] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:59:18,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507419070] [2021-12-06 18:59:18,308 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 18:59:18,308 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:59:18,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:59:18,309 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:59:18,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 18:59:18,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 18:59:18,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:59:18,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 18:59:18,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:59:18,399 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:59:18,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:59:18,472 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:59:18,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507419070] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-06 18:59:18,472 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-06 18:59:18,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 7 [2021-12-06 18:59:18,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367931628] [2021-12-06 18:59:18,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:59:18,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 18:59:18,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:59:18,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 18:59:18,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-06 18:59:18,474 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2021-12-06 18:59:18,474 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 180 transitions, 1877 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:18,474 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 18:59:18,474 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2021-12-06 18:59:18,474 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 18:59:18,616 INFO L129 PetriNetUnfolder]: 252/859 cut-off events. [2021-12-06 18:59:18,616 INFO L130 PetriNetUnfolder]: For 5888/5898 co-relation queries the response was YES. [2021-12-06 18:59:18,618 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3546 conditions, 859 events. 252/859 cut-off events. For 5888/5898 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 5514 event pairs, 48 based on Foata normal form. 10/859 useless extension candidates. Maximal degree in co-relation 3506. Up to 163 conditions per place. [2021-12-06 18:59:18,622 INFO L132 encePairwiseOnDemand]: 75/87 looper letters, 117 selfloop transitions, 81 changer transitions 0/247 dead transitions. [2021-12-06 18:59:18,622 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 247 transitions, 2905 flow [2021-12-06 18:59:18,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 18:59:18,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-12-06 18:59:18,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 431 transitions. [2021-12-06 18:59:18,623 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8256704980842912 [2021-12-06 18:59:18,623 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 431 transitions. [2021-12-06 18:59:18,623 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 431 transitions. [2021-12-06 18:59:18,624 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 18:59:18,624 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 431 transitions. [2021-12-06 18:59:18,624 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 71.83333333333333) internal successors, (431), 6 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:18,625 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 87.0) internal successors, (609), 7 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:18,625 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 87.0) internal successors, (609), 7 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:18,625 INFO L186 Difference]: Start difference. First operand has 155 places, 180 transitions, 1877 flow. Second operand 6 states and 431 transitions. [2021-12-06 18:59:18,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 247 transitions, 2905 flow [2021-12-06 18:59:18,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 247 transitions, 2761 flow, removed 47 selfloop flow, removed 2 redundant places. [2021-12-06 18:59:18,643 INFO L242 Difference]: Finished difference. Result has 163 places, 202 transitions, 2363 flow [2021-12-06 18:59:18,643 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=1770, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2363, PETRI_PLACES=163, PETRI_TRANSITIONS=202} [2021-12-06 18:59:18,644 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 86 predicate places. [2021-12-06 18:59:18,644 INFO L470 AbstractCegarLoop]: Abstraction has has 163 places, 202 transitions, 2363 flow [2021-12-06 18:59:18,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:18,644 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 18:59:18,644 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:59:18,664 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 18:59:18,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-12-06 18:59:18,845 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 18:59:18,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:59:18,845 INFO L85 PathProgramCache]: Analyzing trace with hash -157933399, now seen corresponding path program 3 times [2021-12-06 18:59:18,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:59:18,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118456340] [2021-12-06 18:59:18,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:59:18,846 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:59:18,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:59:18,878 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:59:18,878 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:59:18,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118456340] [2021-12-06 18:59:18,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118456340] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:59:18,879 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:59:18,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 18:59:18,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728142939] [2021-12-06 18:59:18,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:59:18,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 18:59:18,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:59:18,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 18:59:18,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 18:59:18,880 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2021-12-06 18:59:18,881 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 202 transitions, 2363 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:18,881 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 18:59:18,881 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2021-12-06 18:59:18,881 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 18:59:19,025 INFO L129 PetriNetUnfolder]: 254/861 cut-off events. [2021-12-06 18:59:19,025 INFO L130 PetriNetUnfolder]: For 7093/7118 co-relation queries the response was YES. [2021-12-06 18:59:19,028 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3778 conditions, 861 events. 254/861 cut-off events. For 7093/7118 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 5564 event pairs, 63 based on Foata normal form. 9/855 useless extension candidates. Maximal degree in co-relation 3735. Up to 164 conditions per place. [2021-12-06 18:59:19,031 INFO L132 encePairwiseOnDemand]: 79/87 looper letters, 128 selfloop transitions, 60 changer transitions 5/242 dead transitions. [2021-12-06 18:59:19,031 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 242 transitions, 3086 flow [2021-12-06 18:59:19,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 18:59:19,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-12-06 18:59:19,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 558 transitions. [2021-12-06 18:59:19,032 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8017241379310345 [2021-12-06 18:59:19,032 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 558 transitions. [2021-12-06 18:59:19,032 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 558 transitions. [2021-12-06 18:59:19,032 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 18:59:19,033 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 558 transitions. [2021-12-06 18:59:19,033 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 69.75) internal successors, (558), 8 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:19,034 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 87.0) internal successors, (783), 9 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:19,034 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 87.0) internal successors, (783), 9 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:19,034 INFO L186 Difference]: Start difference. First operand has 163 places, 202 transitions, 2363 flow. Second operand 8 states and 558 transitions. [2021-12-06 18:59:19,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 242 transitions, 3086 flow [2021-12-06 18:59:19,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 242 transitions, 3017 flow, removed 19 selfloop flow, removed 4 redundant places. [2021-12-06 18:59:19,054 INFO L242 Difference]: Finished difference. Result has 170 places, 207 transitions, 2548 flow [2021-12-06 18:59:19,054 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=2259, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2548, PETRI_PLACES=170, PETRI_TRANSITIONS=207} [2021-12-06 18:59:19,055 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 93 predicate places. [2021-12-06 18:59:19,055 INFO L470 AbstractCegarLoop]: Abstraction has has 170 places, 207 transitions, 2548 flow [2021-12-06 18:59:19,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:19,055 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 18:59:19,055 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:59:19,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-12-06 18:59:19,055 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 18:59:19,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:59:19,055 INFO L85 PathProgramCache]: Analyzing trace with hash -33237265, now seen corresponding path program 4 times [2021-12-06 18:59:19,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:59:19,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192520522] [2021-12-06 18:59:19,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:59:19,056 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:59:19,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:59:19,075 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:59:19,075 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:59:19,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192520522] [2021-12-06 18:59:19,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192520522] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:59:19,075 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:59:19,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 18:59:19,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250885371] [2021-12-06 18:59:19,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:59:19,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 18:59:19,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:59:19,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 18:59:19,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 18:59:19,077 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2021-12-06 18:59:19,077 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 207 transitions, 2548 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:19,077 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 18:59:19,077 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2021-12-06 18:59:19,077 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 18:59:19,226 INFO L129 PetriNetUnfolder]: 239/781 cut-off events. [2021-12-06 18:59:19,226 INFO L130 PetriNetUnfolder]: For 7389/7414 co-relation queries the response was YES. [2021-12-06 18:59:19,228 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3597 conditions, 781 events. 239/781 cut-off events. For 7389/7414 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 4811 event pairs, 46 based on Foata normal form. 5/776 useless extension candidates. Maximal degree in co-relation 3553. Up to 182 conditions per place. [2021-12-06 18:59:19,232 INFO L132 encePairwiseOnDemand]: 79/87 looper letters, 137 selfloop transitions, 54 changer transitions 5/245 dead transitions. [2021-12-06 18:59:19,232 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 245 transitions, 3229 flow [2021-12-06 18:59:19,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 18:59:19,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-12-06 18:59:19,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 554 transitions. [2021-12-06 18:59:19,233 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7959770114942529 [2021-12-06 18:59:19,233 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 554 transitions. [2021-12-06 18:59:19,233 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 554 transitions. [2021-12-06 18:59:19,233 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 18:59:19,233 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 554 transitions. [2021-12-06 18:59:19,234 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 69.25) internal successors, (554), 8 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:19,234 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 87.0) internal successors, (783), 9 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:19,234 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 87.0) internal successors, (783), 9 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:19,234 INFO L186 Difference]: Start difference. First operand has 170 places, 207 transitions, 2548 flow. Second operand 8 states and 554 transitions. [2021-12-06 18:59:19,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 245 transitions, 3229 flow [2021-12-06 18:59:19,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 245 transitions, 3142 flow, removed 8 selfloop flow, removed 5 redundant places. [2021-12-06 18:59:19,255 INFO L242 Difference]: Finished difference. Result has 174 places, 212 transitions, 2715 flow [2021-12-06 18:59:19,255 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=2406, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2715, PETRI_PLACES=174, PETRI_TRANSITIONS=212} [2021-12-06 18:59:19,256 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 97 predicate places. [2021-12-06 18:59:19,256 INFO L470 AbstractCegarLoop]: Abstraction has has 174 places, 212 transitions, 2715 flow [2021-12-06 18:59:19,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:19,256 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 18:59:19,256 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:59:19,256 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-12-06 18:59:19,256 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 18:59:19,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:59:19,256 INFO L85 PathProgramCache]: Analyzing trace with hash -874020257, now seen corresponding path program 5 times [2021-12-06 18:59:19,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:59:19,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527102977] [2021-12-06 18:59:19,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:59:19,257 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:59:19,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:59:19,275 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:59:19,275 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:59:19,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527102977] [2021-12-06 18:59:19,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527102977] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:59:19,275 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:59:19,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 18:59:19,276 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380783718] [2021-12-06 18:59:19,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:59:19,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 18:59:19,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:59:19,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 18:59:19,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 18:59:19,277 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2021-12-06 18:59:19,277 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 212 transitions, 2715 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:19,277 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 18:59:19,277 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2021-12-06 18:59:19,277 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 18:59:19,433 INFO L129 PetriNetUnfolder]: 246/771 cut-off events. [2021-12-06 18:59:19,433 INFO L130 PetriNetUnfolder]: For 8604/8623 co-relation queries the response was YES. [2021-12-06 18:59:19,436 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3743 conditions, 771 events. 246/771 cut-off events. For 8604/8623 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 4635 event pairs, 46 based on Foata normal form. 9/772 useless extension candidates. Maximal degree in co-relation 3698. Up to 190 conditions per place. [2021-12-06 18:59:19,439 INFO L132 encePairwiseOnDemand]: 79/87 looper letters, 118 selfloop transitions, 92 changer transitions 2/261 dead transitions. [2021-12-06 18:59:19,440 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 261 transitions, 3643 flow [2021-12-06 18:59:19,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 18:59:19,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-12-06 18:59:19,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 568 transitions. [2021-12-06 18:59:19,441 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8160919540229885 [2021-12-06 18:59:19,441 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 568 transitions. [2021-12-06 18:59:19,441 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 568 transitions. [2021-12-06 18:59:19,441 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 18:59:19,441 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 568 transitions. [2021-12-06 18:59:19,442 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 71.0) internal successors, (568), 8 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) [2021-12-06 18:59:19,442 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 87.0) internal successors, (783), 9 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:19,442 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 87.0) internal successors, (783), 9 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:19,442 INFO L186 Difference]: Start difference. First operand has 174 places, 212 transitions, 2715 flow. Second operand 8 states and 568 transitions. [2021-12-06 18:59:19,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 261 transitions, 3643 flow [2021-12-06 18:59:19,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 261 transitions, 3544 flow, removed 4 selfloop flow, removed 9 redundant places. [2021-12-06 18:59:19,465 INFO L242 Difference]: Finished difference. Result has 174 places, 222 transitions, 3136 flow [2021-12-06 18:59:19,465 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=2472, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3136, PETRI_PLACES=174, PETRI_TRANSITIONS=222} [2021-12-06 18:59:19,466 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 97 predicate places. [2021-12-06 18:59:19,466 INFO L470 AbstractCegarLoop]: Abstraction has has 174 places, 222 transitions, 3136 flow [2021-12-06 18:59:19,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:19,466 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 18:59:19,466 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:59:19,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-12-06 18:59:19,467 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 18:59:19,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:59:19,467 INFO L85 PathProgramCache]: Analyzing trace with hash -562261393, now seen corresponding path program 4 times [2021-12-06 18:59:19,467 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:59:19,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853629851] [2021-12-06 18:59:19,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:59:19,467 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:59:19,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:59:19,485 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:59:19,485 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:59:19,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853629851] [2021-12-06 18:59:19,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853629851] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:59:19,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420995162] [2021-12-06 18:59:19,486 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 18:59:19,486 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:59:19,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:59:19,486 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:59:19,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 18:59:19,525 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 18:59:19,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:59:19,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 18:59:19,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:59:19,582 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:59:19,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:59:19,641 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:59:19,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420995162] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-06 18:59:19,641 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-06 18:59:19,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 7 [2021-12-06 18:59:19,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583102204] [2021-12-06 18:59:19,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:59:19,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 18:59:19,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:59:19,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 18:59:19,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-06 18:59:19,642 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2021-12-06 18:59:19,643 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 222 transitions, 3136 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:19,643 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 18:59:19,643 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2021-12-06 18:59:19,643 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 18:59:19,759 INFO L129 PetriNetUnfolder]: 230/710 cut-off events. [2021-12-06 18:59:19,760 INFO L130 PetriNetUnfolder]: For 9659/9659 co-relation queries the response was YES. [2021-12-06 18:59:19,762 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3676 conditions, 710 events. 230/710 cut-off events. For 9659/9659 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 4061 event pairs, 45 based on Foata normal form. 8/713 useless extension candidates. Maximal degree in co-relation 3633. Up to 229 conditions per place. [2021-12-06 18:59:19,765 INFO L132 encePairwiseOnDemand]: 78/87 looper letters, 131 selfloop transitions, 67 changer transitions 0/247 dead transitions. [2021-12-06 18:59:19,765 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 247 transitions, 3702 flow [2021-12-06 18:59:19,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 18:59:19,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-12-06 18:59:19,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 426 transitions. [2021-12-06 18:59:19,766 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8160919540229885 [2021-12-06 18:59:19,766 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 426 transitions. [2021-12-06 18:59:19,766 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 426 transitions. [2021-12-06 18:59:19,766 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 18:59:19,766 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 426 transitions. [2021-12-06 18:59:19,767 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 71.0) internal successors, (426), 6 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:19,767 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 87.0) internal successors, (609), 7 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:19,767 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 87.0) internal successors, (609), 7 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:19,767 INFO L186 Difference]: Start difference. First operand has 174 places, 222 transitions, 3136 flow. Second operand 6 states and 426 transitions. [2021-12-06 18:59:19,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 247 transitions, 3702 flow [2021-12-06 18:59:19,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 247 transitions, 3679 flow, removed 2 selfloop flow, removed 1 redundant places. [2021-12-06 18:59:19,791 INFO L242 Difference]: Finished difference. Result has 180 places, 221 transitions, 3284 flow [2021-12-06 18:59:19,792 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=2998, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3284, PETRI_PLACES=180, PETRI_TRANSITIONS=221} [2021-12-06 18:59:19,792 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 103 predicate places. [2021-12-06 18:59:19,792 INFO L470 AbstractCegarLoop]: Abstraction has has 180 places, 221 transitions, 3284 flow [2021-12-06 18:59:19,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:19,792 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 18:59:19,792 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:59:19,811 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-06 18:59:19,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:59:19,994 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 18:59:19,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:59:19,995 INFO L85 PathProgramCache]: Analyzing trace with hash -736852561, now seen corresponding path program 5 times [2021-12-06 18:59:19,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:59:19,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570155291] [2021-12-06 18:59:19,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:59:19,996 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:59:20,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:59:20,045 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:59:20,045 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:59:20,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570155291] [2021-12-06 18:59:20,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570155291] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:59:20,046 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:59:20,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 18:59:20,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492841206] [2021-12-06 18:59:20,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:59:20,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 18:59:20,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:59:20,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 18:59:20,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 18:59:20,047 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2021-12-06 18:59:20,047 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 221 transitions, 3284 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:20,047 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 18:59:20,048 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2021-12-06 18:59:20,048 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 18:59:20,203 INFO L129 PetriNetUnfolder]: 225/704 cut-off events. [2021-12-06 18:59:20,203 INFO L130 PetriNetUnfolder]: For 10574/10576 co-relation queries the response was YES. [2021-12-06 18:59:20,206 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3784 conditions, 704 events. 225/704 cut-off events. For 10574/10576 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 3998 event pairs, 60 based on Foata normal form. 3/698 useless extension candidates. Maximal degree in co-relation 3739. Up to 195 conditions per place. [2021-12-06 18:59:20,210 INFO L132 encePairwiseOnDemand]: 81/87 looper letters, 151 selfloop transitions, 33 changer transitions 5/238 dead transitions. [2021-12-06 18:59:20,210 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 238 transitions, 3723 flow [2021-12-06 18:59:20,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 18:59:20,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-06 18:59:20,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 483 transitions. [2021-12-06 18:59:20,212 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7931034482758621 [2021-12-06 18:59:20,212 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 483 transitions. [2021-12-06 18:59:20,212 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 483 transitions. [2021-12-06 18:59:20,212 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 18:59:20,212 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 483 transitions. [2021-12-06 18:59:20,213 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 69.0) internal successors, (483), 7 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:20,214 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 87.0) internal successors, (696), 8 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:20,214 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 87.0) internal successors, (696), 8 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:20,214 INFO L186 Difference]: Start difference. First operand has 180 places, 221 transitions, 3284 flow. Second operand 7 states and 483 transitions. [2021-12-06 18:59:20,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 238 transitions, 3723 flow [2021-12-06 18:59:20,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 238 transitions, 3705 flow, removed 9 selfloop flow, removed 0 redundant places. [2021-12-06 18:59:20,249 INFO L242 Difference]: Finished difference. Result has 187 places, 216 transitions, 3188 flow [2021-12-06 18:59:20,249 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=3189, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3188, PETRI_PLACES=187, PETRI_TRANSITIONS=216} [2021-12-06 18:59:20,250 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 110 predicate places. [2021-12-06 18:59:20,250 INFO L470 AbstractCegarLoop]: Abstraction has has 187 places, 216 transitions, 3188 flow [2021-12-06 18:59:20,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:20,250 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 18:59:20,250 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:59:20,250 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-12-06 18:59:20,250 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 18:59:20,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:59:20,251 INFO L85 PathProgramCache]: Analyzing trace with hash -540499465, now seen corresponding path program 6 times [2021-12-06 18:59:20,251 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:59:20,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849267046] [2021-12-06 18:59:20,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:59:20,251 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:59:20,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:59:20,271 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:59:20,271 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:59:20,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849267046] [2021-12-06 18:59:20,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849267046] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:59:20,271 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:59:20,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 18:59:20,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804145583] [2021-12-06 18:59:20,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:59:20,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 18:59:20,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:59:20,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 18:59:20,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 18:59:20,272 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2021-12-06 18:59:20,273 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 216 transitions, 3188 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:20,273 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 18:59:20,273 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2021-12-06 18:59:20,273 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 18:59:20,458 INFO L129 PetriNetUnfolder]: 213/645 cut-off events. [2021-12-06 18:59:20,458 INFO L130 PetriNetUnfolder]: For 10200/10202 co-relation queries the response was YES. [2021-12-06 18:59:20,461 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3547 conditions, 645 events. 213/645 cut-off events. For 10200/10202 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 3514 event pairs, 52 based on Foata normal form. 2/638 useless extension candidates. Maximal degree in co-relation 3500. Up to 195 conditions per place. [2021-12-06 18:59:20,464 INFO L132 encePairwiseOnDemand]: 79/87 looper letters, 124 selfloop transitions, 49 changer transitions 2/224 dead transitions. [2021-12-06 18:59:20,464 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 224 transitions, 3456 flow [2021-12-06 18:59:20,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 18:59:20,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-12-06 18:59:20,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 550 transitions. [2021-12-06 18:59:20,465 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7902298850574713 [2021-12-06 18:59:20,465 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 550 transitions. [2021-12-06 18:59:20,466 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 550 transitions. [2021-12-06 18:59:20,466 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 18:59:20,466 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 550 transitions. [2021-12-06 18:59:20,467 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 68.75) internal successors, (550), 8 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:20,468 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 87.0) internal successors, (783), 9 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:20,468 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 87.0) internal successors, (783), 9 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:20,468 INFO L186 Difference]: Start difference. First operand has 187 places, 216 transitions, 3188 flow. Second operand 8 states and 550 transitions. [2021-12-06 18:59:20,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 224 transitions, 3456 flow [2021-12-06 18:59:20,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 224 transitions, 3370 flow, removed 9 selfloop flow, removed 4 redundant places. [2021-12-06 18:59:20,505 INFO L242 Difference]: Finished difference. Result has 186 places, 202 transitions, 2978 flow [2021-12-06 18:59:20,505 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=2906, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2978, PETRI_PLACES=186, PETRI_TRANSITIONS=202} [2021-12-06 18:59:20,506 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 109 predicate places. [2021-12-06 18:59:20,506 INFO L470 AbstractCegarLoop]: Abstraction has has 186 places, 202 transitions, 2978 flow [2021-12-06 18:59:20,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:20,506 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 18:59:20,506 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:59:20,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-12-06 18:59:20,507 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 18:59:20,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:59:20,507 INFO L85 PathProgramCache]: Analyzing trace with hash 567381603, now seen corresponding path program 6 times [2021-12-06 18:59:20,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:59:20,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345983863] [2021-12-06 18:59:20,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:59:20,508 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:59:20,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:59:20,530 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:59:20,530 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:59:20,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345983863] [2021-12-06 18:59:20,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345983863] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:59:20,530 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:59:20,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 18:59:20,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074410152] [2021-12-06 18:59:20,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:59:20,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 18:59:20,531 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:59:20,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 18:59:20,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 18:59:20,531 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2021-12-06 18:59:20,532 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 202 transitions, 2978 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:20,532 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 18:59:20,532 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2021-12-06 18:59:20,532 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 18:59:20,661 INFO L129 PetriNetUnfolder]: 196/571 cut-off events. [2021-12-06 18:59:20,662 INFO L130 PetriNetUnfolder]: For 9516/9518 co-relation queries the response was YES. [2021-12-06 18:59:20,664 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3272 conditions, 571 events. 196/571 cut-off events. For 9516/9518 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2893 event pairs, 39 based on Foata normal form. 3/568 useless extension candidates. Maximal degree in co-relation 3226. Up to 190 conditions per place. [2021-12-06 18:59:20,666 INFO L132 encePairwiseOnDemand]: 79/87 looper letters, 109 selfloop transitions, 45 changer transitions 3/206 dead transitions. [2021-12-06 18:59:20,666 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 206 transitions, 3168 flow [2021-12-06 18:59:20,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 18:59:20,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-06 18:59:20,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 480 transitions. [2021-12-06 18:59:20,668 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7881773399014779 [2021-12-06 18:59:20,668 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 480 transitions. [2021-12-06 18:59:20,668 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 480 transitions. [2021-12-06 18:59:20,668 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 18:59:20,668 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 480 transitions. [2021-12-06 18:59:20,669 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 68.57142857142857) internal successors, (480), 7 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:20,669 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 87.0) internal successors, (696), 8 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:20,669 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 87.0) internal successors, (696), 8 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:20,669 INFO L186 Difference]: Start difference. First operand has 186 places, 202 transitions, 2978 flow. Second operand 7 states and 480 transitions. [2021-12-06 18:59:20,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 206 transitions, 3168 flow [2021-12-06 18:59:20,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 206 transitions, 3058 flow, removed 9 selfloop flow, removed 10 redundant places. [2021-12-06 18:59:20,692 INFO L242 Difference]: Finished difference. Result has 176 places, 188 transitions, 2729 flow [2021-12-06 18:59:20,692 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=2666, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2729, PETRI_PLACES=176, PETRI_TRANSITIONS=188} [2021-12-06 18:59:20,693 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 99 predicate places. [2021-12-06 18:59:20,693 INFO L470 AbstractCegarLoop]: Abstraction has has 176 places, 188 transitions, 2729 flow [2021-12-06 18:59:20,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:20,693 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 18:59:20,693 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:59:20,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-12-06 18:59:20,693 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 18:59:20,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:59:20,694 INFO L85 PathProgramCache]: Analyzing trace with hash -1990008755, now seen corresponding path program 1 times [2021-12-06 18:59:20,694 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:59:20,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54472988] [2021-12-06 18:59:20,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:59:20,694 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:59:20,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:59:20,798 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:59:20,799 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:59:20,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54472988] [2021-12-06 18:59:20,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54472988] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:59:20,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538074266] [2021-12-06 18:59:20,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:59:20,799 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:59:20,799 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:59:20,800 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:59:20,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 18:59:20,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:59:20,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-06 18:59:20,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:59:21,120 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:59:21,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:59:21,599 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:59:21,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538074266] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:59:21,599 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:59:21,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2021-12-06 18:59:21,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054879754] [2021-12-06 18:59:21,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:59:21,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-06 18:59:21,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:59:21,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-06 18:59:21,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=981, Unknown=0, NotChecked=0, Total=1122 [2021-12-06 18:59:21,602 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2021-12-06 18:59:21,603 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 188 transitions, 2729 flow. Second operand has 34 states, 34 states have (on average 50.794117647058826) internal successors, (1727), 34 states have internal predecessors, (1727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:21,603 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 18:59:21,603 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2021-12-06 18:59:21,603 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 18:59:28,999 INFO L129 PetriNetUnfolder]: 972/2298 cut-off events. [2021-12-06 18:59:28,999 INFO L130 PetriNetUnfolder]: For 36390/36390 co-relation queries the response was YES. [2021-12-06 18:59:29,009 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13560 conditions, 2298 events. 972/2298 cut-off events. For 36390/36390 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 15694 event pairs, 34 based on Foata normal form. 3/2289 useless extension candidates. Maximal degree in co-relation 13516. Up to 363 conditions per place. [2021-12-06 18:59:29,024 INFO L132 encePairwiseOnDemand]: 64/87 looper letters, 247 selfloop transitions, 856 changer transitions 17/1159 dead transitions. [2021-12-06 18:59:29,024 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 393 places, 1159 transitions, 17967 flow [2021-12-06 18:59:29,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 224 states. [2021-12-06 18:59:29,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2021-12-06 18:59:29,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 11784 transitions. [2021-12-06 18:59:29,037 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.604679802955665 [2021-12-06 18:59:29,037 INFO L72 ComplementDD]: Start complementDD. Operand 224 states and 11784 transitions. [2021-12-06 18:59:29,037 INFO L73 IsDeterministic]: Start isDeterministic. Operand 224 states and 11784 transitions. [2021-12-06 18:59:29,040 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 18:59:29,040 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 224 states and 11784 transitions. [2021-12-06 18:59:29,052 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 225 states, 224 states have (on average 52.607142857142854) internal successors, (11784), 224 states have internal predecessors, (11784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:29,068 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 225 states, 225 states have (on average 87.0) internal successors, (19575), 225 states have internal predecessors, (19575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:29,071 INFO L81 ComplementDD]: Finished complementDD. Result has 225 states, 225 states have (on average 87.0) internal successors, (19575), 225 states have internal predecessors, (19575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:29,071 INFO L186 Difference]: Start difference. First operand has 176 places, 188 transitions, 2729 flow. Second operand 224 states and 11784 transitions. [2021-12-06 18:59:29,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 393 places, 1159 transitions, 17967 flow [2021-12-06 18:59:29,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 1159 transitions, 17323 flow, removed 0 selfloop flow, removed 9 redundant places. [2021-12-06 18:59:29,157 INFO L242 Difference]: Finished difference. Result has 446 places, 990 transitions, 16263 flow [2021-12-06 18:59:29,157 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=2572, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=224, PETRI_FLOW=16263, PETRI_PLACES=446, PETRI_TRANSITIONS=990} [2021-12-06 18:59:29,157 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 369 predicate places. [2021-12-06 18:59:29,158 INFO L470 AbstractCegarLoop]: Abstraction has has 446 places, 990 transitions, 16263 flow [2021-12-06 18:59:29,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 50.794117647058826) internal successors, (1727), 34 states have internal predecessors, (1727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:29,158 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 18:59:29,158 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:59:29,177 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-06 18:59:29,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-12-06 18:59:29,360 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 18:59:29,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:59:29,361 INFO L85 PathProgramCache]: Analyzing trace with hash -2039132535, now seen corresponding path program 2 times [2021-12-06 18:59:29,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:59:29,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462652358] [2021-12-06 18:59:29,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:59:29,363 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:59:29,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:59:29,499 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:59:29,499 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:59:29,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462652358] [2021-12-06 18:59:29,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462652358] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:59:29,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414285726] [2021-12-06 18:59:29,500 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 18:59:29,500 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:59:29,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:59:29,500 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:59:29,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 18:59:29,546 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 18:59:29,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:59:29,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-06 18:59:29,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:59:29,783 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:59:29,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:59:30,205 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:59:30,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414285726] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:59:30,205 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:59:30,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2021-12-06 18:59:30,206 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606271399] [2021-12-06 18:59:30,206 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:59:30,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-06 18:59:30,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:59:30,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-06 18:59:30,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=990, Unknown=0, NotChecked=0, Total=1122 [2021-12-06 18:59:30,208 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2021-12-06 18:59:30,209 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 446 places, 990 transitions, 16263 flow. Second operand has 34 states, 34 states have (on average 50.73529411764706) internal successors, (1725), 34 states have internal predecessors, (1725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:30,209 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 18:59:30,209 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2021-12-06 18:59:30,209 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 18:59:32,733 INFO L129 PetriNetUnfolder]: 1106/2968 cut-off events. [2021-12-06 18:59:32,734 INFO L130 PetriNetUnfolder]: For 137972/137972 co-relation queries the response was YES. [2021-12-06 18:59:32,756 INFO L84 FinitePrefix]: Finished finitePrefix Result has 24643 conditions, 2968 events. 1106/2968 cut-off events. For 137972/137972 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 23864 event pairs, 50 based on Foata normal form. 1/2955 useless extension candidates. Maximal degree in co-relation 24537. Up to 439 conditions per place. [2021-12-06 18:59:32,786 INFO L132 encePairwiseOnDemand]: 67/87 looper letters, 360 selfloop transitions, 763 changer transitions 45/1207 dead transitions. [2021-12-06 18:59:32,786 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 501 places, 1207 transitions, 23367 flow [2021-12-06 18:59:32,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-12-06 18:59:32,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2021-12-06 18:59:32,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 3489 transitions. [2021-12-06 18:59:32,790 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6266163793103449 [2021-12-06 18:59:32,791 INFO L72 ComplementDD]: Start complementDD. Operand 64 states and 3489 transitions. [2021-12-06 18:59:32,791 INFO L73 IsDeterministic]: Start isDeterministic. Operand 64 states and 3489 transitions. [2021-12-06 18:59:32,792 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 18:59:32,792 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 64 states and 3489 transitions. [2021-12-06 18:59:32,796 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 65 states, 64 states have (on average 54.515625) internal successors, (3489), 64 states have internal predecessors, (3489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:32,801 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 65 states, 65 states have (on average 87.0) internal successors, (5655), 65 states have internal predecessors, (5655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:32,801 INFO L81 ComplementDD]: Finished complementDD. Result has 65 states, 65 states have (on average 87.0) internal successors, (5655), 65 states have internal predecessors, (5655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:32,801 INFO L186 Difference]: Start difference. First operand has 446 places, 990 transitions, 16263 flow. Second operand 64 states and 3489 transitions. [2021-12-06 18:59:32,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 501 places, 1207 transitions, 23367 flow [2021-12-06 18:59:33,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 488 places, 1207 transitions, 21916 flow, removed 479 selfloop flow, removed 13 redundant places. [2021-12-06 18:59:33,221 INFO L242 Difference]: Finished difference. Result has 508 places, 1036 transitions, 17767 flow [2021-12-06 18:59:33,222 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=15031, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=990, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=723, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=64, PETRI_FLOW=17767, PETRI_PLACES=508, PETRI_TRANSITIONS=1036} [2021-12-06 18:59:33,222 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 431 predicate places. [2021-12-06 18:59:33,222 INFO L470 AbstractCegarLoop]: Abstraction has has 508 places, 1036 transitions, 17767 flow [2021-12-06 18:59:33,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 50.73529411764706) internal successors, (1725), 34 states have internal predecessors, (1725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:33,222 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 18:59:33,222 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:59:33,243 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-06 18:59:33,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-12-06 18:59:33,423 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 18:59:33,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:59:33,424 INFO L85 PathProgramCache]: Analyzing trace with hash -234836121, now seen corresponding path program 3 times [2021-12-06 18:59:33,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:59:33,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984219791] [2021-12-06 18:59:33,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:59:33,425 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:59:33,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:59:33,556 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:59:33,556 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:59:33,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984219791] [2021-12-06 18:59:33,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984219791] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:59:33,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902169777] [2021-12-06 18:59:33,557 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 18:59:33,557 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:59:33,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:59:33,558 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:59:33,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-06 18:59:33,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-06 18:59:33,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:59:33,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-06 18:59:33,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:59:33,822 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:59:33,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:59:34,195 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:59:34,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902169777] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:59:34,195 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:59:34,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2021-12-06 18:59:34,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655733656] [2021-12-06 18:59:34,196 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:59:34,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-06 18:59:34,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:59:34,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-06 18:59:34,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=983, Unknown=0, NotChecked=0, Total=1122 [2021-12-06 18:59:34,198 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2021-12-06 18:59:34,198 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 508 places, 1036 transitions, 17767 flow. Second operand has 34 states, 34 states have (on average 50.73529411764706) internal successors, (1725), 34 states have internal predecessors, (1725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:34,199 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 18:59:34,199 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2021-12-06 18:59:34,199 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 18:59:36,724 INFO L129 PetriNetUnfolder]: 1087/2956 cut-off events. [2021-12-06 18:59:36,725 INFO L130 PetriNetUnfolder]: For 157907/157907 co-relation queries the response was YES. [2021-12-06 18:59:36,749 INFO L84 FinitePrefix]: Finished finitePrefix Result has 25841 conditions, 2956 events. 1087/2956 cut-off events. For 157907/157907 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 24023 event pairs, 61 based on Foata normal form. 2/2931 useless extension candidates. Maximal degree in co-relation 25724. Up to 415 conditions per place. [2021-12-06 18:59:36,767 INFO L132 encePairwiseOnDemand]: 67/87 looper letters, 339 selfloop transitions, 775 changer transitions 31/1184 dead transitions. [2021-12-06 18:59:36,767 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 564 places, 1184 transitions, 23647 flow [2021-12-06 18:59:36,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-12-06 18:59:36,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2021-12-06 18:59:36,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 3577 transitions. [2021-12-06 18:59:36,770 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6229536746778126 [2021-12-06 18:59:36,770 INFO L72 ComplementDD]: Start complementDD. Operand 66 states and 3577 transitions. [2021-12-06 18:59:36,770 INFO L73 IsDeterministic]: Start isDeterministic. Operand 66 states and 3577 transitions. [2021-12-06 18:59:36,771 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 18:59:36,771 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 66 states and 3577 transitions. [2021-12-06 18:59:36,774 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 67 states, 66 states have (on average 54.196969696969695) internal successors, (3577), 66 states have internal predecessors, (3577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:36,778 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 67 states, 67 states have (on average 87.0) internal successors, (5829), 67 states have internal predecessors, (5829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:36,778 INFO L81 ComplementDD]: Finished complementDD. Result has 67 states, 67 states have (on average 87.0) internal successors, (5829), 67 states have internal predecessors, (5829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:36,779 INFO L186 Difference]: Start difference. First operand has 508 places, 1036 transitions, 17767 flow. Second operand 66 states and 3577 transitions. [2021-12-06 18:59:36,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 564 places, 1184 transitions, 23647 flow [2021-12-06 18:59:37,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 521 places, 1184 transitions, 21875 flow, removed 167 selfloop flow, removed 43 redundant places. [2021-12-06 18:59:37,309 INFO L242 Difference]: Finished difference. Result has 538 places, 1053 transitions, 18288 flow [2021-12-06 18:59:37,310 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=16108, PETRI_DIFFERENCE_MINUEND_PLACES=456, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1036, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=759, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=66, PETRI_FLOW=18288, PETRI_PLACES=538, PETRI_TRANSITIONS=1053} [2021-12-06 18:59:37,310 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 461 predicate places. [2021-12-06 18:59:37,310 INFO L470 AbstractCegarLoop]: Abstraction has has 538 places, 1053 transitions, 18288 flow [2021-12-06 18:59:37,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 50.73529411764706) internal successors, (1725), 34 states have internal predecessors, (1725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:37,311 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 18:59:37,311 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:59:37,330 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-06 18:59:37,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-12-06 18:59:37,512 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 18:59:37,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:59:37,513 INFO L85 PathProgramCache]: Analyzing trace with hash -1084507737, now seen corresponding path program 4 times [2021-12-06 18:59:37,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:59:37,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96742663] [2021-12-06 18:59:37,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:59:37,514 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:59:37,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:59:37,626 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:59:37,626 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:59:37,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96742663] [2021-12-06 18:59:37,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96742663] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:59:37,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877361867] [2021-12-06 18:59:37,627 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 18:59:37,627 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:59:37,627 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:59:37,627 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:59:37,628 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-06 18:59:37,665 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 18:59:37,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:59:37,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-06 18:59:37,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:59:37,936 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:59:37,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:59:38,234 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:59:38,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877361867] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:59:38,234 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:59:38,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 33 [2021-12-06 18:59:38,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608450815] [2021-12-06 18:59:38,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:59:38,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-06 18:59:38,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:59:38,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-06 18:59:38,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=933, Unknown=0, NotChecked=0, Total=1056 [2021-12-06 18:59:38,237 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2021-12-06 18:59:38,238 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 538 places, 1053 transitions, 18288 flow. Second operand has 33 states, 33 states have (on average 50.93939393939394) internal successors, (1681), 33 states have internal predecessors, (1681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:38,238 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 18:59:38,238 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2021-12-06 18:59:38,238 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 18:59:39,932 INFO L129 PetriNetUnfolder]: 1083/3024 cut-off events. [2021-12-06 18:59:39,932 INFO L130 PetriNetUnfolder]: For 170749/170749 co-relation queries the response was YES. [2021-12-06 18:59:39,959 INFO L84 FinitePrefix]: Finished finitePrefix Result has 26555 conditions, 3024 events. 1083/3024 cut-off events. For 170749/170749 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 25173 event pairs, 98 based on Foata normal form. 3/2998 useless extension candidates. Maximal degree in co-relation 26430. Up to 461 conditions per place. [2021-12-06 18:59:39,977 INFO L132 encePairwiseOnDemand]: 69/87 looper letters, 654 selfloop transitions, 462 changer transitions 19/1174 dead transitions. [2021-12-06 18:59:39,977 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 563 places, 1174 transitions, 23596 flow [2021-12-06 18:59:39,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-12-06 18:59:39,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-12-06 18:59:39,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2064 transitions. [2021-12-06 18:59:39,979 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.641192917054986 [2021-12-06 18:59:39,979 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2064 transitions. [2021-12-06 18:59:39,979 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2064 transitions. [2021-12-06 18:59:39,980 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 18:59:39,980 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2064 transitions. [2021-12-06 18:59:39,981 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 55.78378378378378) internal successors, (2064), 37 states have internal predecessors, (2064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:39,983 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 87.0) internal successors, (3306), 38 states have internal predecessors, (3306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:39,983 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 87.0) internal successors, (3306), 38 states have internal predecessors, (3306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:39,984 INFO L186 Difference]: Start difference. First operand has 538 places, 1053 transitions, 18288 flow. Second operand 37 states and 2064 transitions. [2021-12-06 18:59:39,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 563 places, 1174 transitions, 23596 flow [2021-12-06 18:59:40,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 511 places, 1174 transitions, 21855 flow, removed 134 selfloop flow, removed 52 redundant places. [2021-12-06 18:59:40,511 INFO L242 Difference]: Finished difference. Result has 519 places, 1068 transitions, 17937 flow [2021-12-06 18:59:40,512 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=16677, PETRI_DIFFERENCE_MINUEND_PLACES=475, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1053, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=445, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=599, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=17937, PETRI_PLACES=519, PETRI_TRANSITIONS=1068} [2021-12-06 18:59:40,512 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 442 predicate places. [2021-12-06 18:59:40,512 INFO L470 AbstractCegarLoop]: Abstraction has has 519 places, 1068 transitions, 17937 flow [2021-12-06 18:59:40,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 50.93939393939394) internal successors, (1681), 33 states have internal predecessors, (1681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:40,513 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 18:59:40,513 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:59:40,532 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-06 18:59:40,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-12-06 18:59:40,715 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 18:59:40,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:59:40,716 INFO L85 PathProgramCache]: Analyzing trace with hash 313019791, now seen corresponding path program 5 times [2021-12-06 18:59:40,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:59:40,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697819124] [2021-12-06 18:59:40,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:59:40,717 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:59:40,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:59:40,858 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:59:40,859 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:59:40,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697819124] [2021-12-06 18:59:40,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697819124] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:59:40,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289733848] [2021-12-06 18:59:40,859 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 18:59:40,859 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:59:40,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:59:40,860 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:59:40,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-06 18:59:40,904 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 18:59:40,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:59:40,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-06 18:59:40,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:59:41,143 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:59:41,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:59:41,463 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:59:41,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289733848] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:59:41,463 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:59:41,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 33 [2021-12-06 18:59:41,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317207795] [2021-12-06 18:59:41,463 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:59:41,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-06 18:59:41,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:59:41,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-06 18:59:41,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=939, Unknown=0, NotChecked=0, Total=1056 [2021-12-06 18:59:41,466 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2021-12-06 18:59:41,466 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 519 places, 1068 transitions, 17937 flow. Second operand has 33 states, 33 states have (on average 50.90909090909091) internal successors, (1680), 33 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:41,466 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 18:59:41,467 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2021-12-06 18:59:41,467 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 18:59:43,291 INFO L129 PetriNetUnfolder]: 1141/3141 cut-off events. [2021-12-06 18:59:43,291 INFO L130 PetriNetUnfolder]: For 168024/168024 co-relation queries the response was YES. [2021-12-06 18:59:43,319 INFO L84 FinitePrefix]: Finished finitePrefix Result has 27306 conditions, 3141 events. 1141/3141 cut-off events. For 168024/168024 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 26429 event pairs, 72 based on Foata normal form. 2/3100 useless extension candidates. Maximal degree in co-relation 27183. Up to 620 conditions per place. [2021-12-06 18:59:43,337 INFO L132 encePairwiseOnDemand]: 69/87 looper letters, 316 selfloop transitions, 904 changer transitions 21/1280 dead transitions. [2021-12-06 18:59:43,337 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 560 places, 1280 transitions, 24701 flow [2021-12-06 18:59:43,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-12-06 18:59:43,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2021-12-06 18:59:43,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 2440 transitions. [2021-12-06 18:59:43,340 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6232439335887612 [2021-12-06 18:59:43,340 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 2440 transitions. [2021-12-06 18:59:43,340 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 2440 transitions. [2021-12-06 18:59:43,341 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 18:59:43,341 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 2440 transitions. [2021-12-06 18:59:43,343 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 54.22222222222222) internal successors, (2440), 45 states have internal predecessors, (2440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:43,345 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 87.0) internal successors, (4002), 46 states have internal predecessors, (4002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:43,345 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 87.0) internal successors, (4002), 46 states have internal predecessors, (4002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:43,345 INFO L186 Difference]: Start difference. First operand has 519 places, 1068 transitions, 17937 flow. Second operand 45 states and 2440 transitions. [2021-12-06 18:59:43,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 560 places, 1280 transitions, 24701 flow [2021-12-06 18:59:43,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 539 places, 1280 transitions, 23870 flow, removed 48 selfloop flow, removed 21 redundant places. [2021-12-06 18:59:43,980 INFO L242 Difference]: Finished difference. Result has 558 places, 1181 transitions, 21851 flow [2021-12-06 18:59:43,980 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=17162, PETRI_DIFFERENCE_MINUEND_PLACES=495, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1068, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=785, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=21851, PETRI_PLACES=558, PETRI_TRANSITIONS=1181} [2021-12-06 18:59:43,981 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 481 predicate places. [2021-12-06 18:59:43,981 INFO L470 AbstractCegarLoop]: Abstraction has has 558 places, 1181 transitions, 21851 flow [2021-12-06 18:59:43,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 50.90909090909091) internal successors, (1680), 33 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:43,981 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 18:59:43,981 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:59:44,000 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-06 18:59:44,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-12-06 18:59:44,183 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 18:59:44,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:59:44,184 INFO L85 PathProgramCache]: Analyzing trace with hash 58562409, now seen corresponding path program 6 times [2021-12-06 18:59:44,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:59:44,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420122548] [2021-12-06 18:59:44,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:59:44,185 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:59:44,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:59:44,331 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:59:44,331 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:59:44,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420122548] [2021-12-06 18:59:44,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420122548] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:59:44,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340930418] [2021-12-06 18:59:44,332 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 18:59:44,332 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:59:44,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:59:44,333 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:59:44,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-06 18:59:44,373 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-12-06 18:59:44,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:59:44,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-06 18:59:44,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:59:44,665 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:59:44,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:59:45,086 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:59:45,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340930418] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:59:45,086 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:59:45,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2021-12-06 18:59:45,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201087803] [2021-12-06 18:59:45,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:59:45,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-06 18:59:45,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:59:45,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-06 18:59:45,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=973, Unknown=0, NotChecked=0, Total=1122 [2021-12-06 18:59:45,088 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2021-12-06 18:59:45,089 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 558 places, 1181 transitions, 21851 flow. Second operand has 34 states, 34 states have (on average 50.794117647058826) internal successors, (1727), 34 states have internal predecessors, (1727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:45,089 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 18:59:45,089 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2021-12-06 18:59:45,089 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 18:59:47,876 INFO L129 PetriNetUnfolder]: 1186/3312 cut-off events. [2021-12-06 18:59:47,876 INFO L130 PetriNetUnfolder]: For 192460/192460 co-relation queries the response was YES. [2021-12-06 18:59:47,908 INFO L84 FinitePrefix]: Finished finitePrefix Result has 30627 conditions, 3312 events. 1186/3312 cut-off events. For 192460/192460 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 27905 event pairs, 69 based on Foata normal form. 1/3282 useless extension candidates. Maximal degree in co-relation 30489. Up to 445 conditions per place. [2021-12-06 18:59:47,929 INFO L132 encePairwiseOnDemand]: 66/87 looper letters, 447 selfloop transitions, 853 changer transitions 50/1389 dead transitions. [2021-12-06 18:59:47,929 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 613 places, 1389 transitions, 30375 flow [2021-12-06 18:59:47,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-12-06 18:59:47,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2021-12-06 18:59:47,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 3349 transitions. [2021-12-06 18:59:47,932 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6310533257961183 [2021-12-06 18:59:47,932 INFO L72 ComplementDD]: Start complementDD. Operand 61 states and 3349 transitions. [2021-12-06 18:59:47,933 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 3349 transitions. [2021-12-06 18:59:47,933 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 18:59:47,933 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 61 states and 3349 transitions. [2021-12-06 18:59:47,936 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 62 states, 61 states have (on average 54.90163934426229) internal successors, (3349), 61 states have internal predecessors, (3349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:47,939 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 62 states, 62 states have (on average 87.0) internal successors, (5394), 62 states have internal predecessors, (5394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:47,939 INFO L81 ComplementDD]: Finished complementDD. Result has 62 states, 62 states have (on average 87.0) internal successors, (5394), 62 states have internal predecessors, (5394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:47,939 INFO L186 Difference]: Start difference. First operand has 558 places, 1181 transitions, 21851 flow. Second operand 61 states and 3349 transitions. [2021-12-06 18:59:47,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 613 places, 1389 transitions, 30375 flow [2021-12-06 18:59:48,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 598 places, 1389 transitions, 29834 flow, removed 176 selfloop flow, removed 15 redundant places. [2021-12-06 18:59:48,714 INFO L242 Difference]: Finished difference. Result has 617 places, 1215 transitions, 24467 flow [2021-12-06 18:59:48,715 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=21528, PETRI_DIFFERENCE_MINUEND_PLACES=538, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=783, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=61, PETRI_FLOW=24467, PETRI_PLACES=617, PETRI_TRANSITIONS=1215} [2021-12-06 18:59:48,715 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 540 predicate places. [2021-12-06 18:59:48,715 INFO L470 AbstractCegarLoop]: Abstraction has has 617 places, 1215 transitions, 24467 flow [2021-12-06 18:59:48,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 50.794117647058826) internal successors, (1727), 34 states have internal predecessors, (1727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:48,716 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 18:59:48,716 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:59:48,735 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-12-06 18:59:48,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-12-06 18:59:48,916 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 18:59:48,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:59:48,917 INFO L85 PathProgramCache]: Analyzing trace with hash -1976082511, now seen corresponding path program 7 times [2021-12-06 18:59:48,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:59:48,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903467505] [2021-12-06 18:59:48,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:59:48,917 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:59:48,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:59:49,037 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:59:49,037 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:59:49,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903467505] [2021-12-06 18:59:49,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903467505] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:59:49,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496782311] [2021-12-06 18:59:49,037 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 18:59:49,037 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:59:49,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:59:49,038 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:59:49,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-06 18:59:49,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:59:49,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-06 18:59:49,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:59:49,290 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:59:49,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:59:49,642 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:59:49,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496782311] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:59:49,642 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:59:49,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2021-12-06 18:59:49,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161512151] [2021-12-06 18:59:49,643 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:59:49,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-06 18:59:49,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:59:49,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-06 18:59:49,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=974, Unknown=0, NotChecked=0, Total=1122 [2021-12-06 18:59:49,644 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2021-12-06 18:59:49,645 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 617 places, 1215 transitions, 24467 flow. Second operand has 34 states, 34 states have (on average 50.705882352941174) internal successors, (1724), 34 states have internal predecessors, (1724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:49,645 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 18:59:49,645 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2021-12-06 18:59:49,645 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 18:59:52,557 INFO L129 PetriNetUnfolder]: 1328/3696 cut-off events. [2021-12-06 18:59:52,558 INFO L130 PetriNetUnfolder]: For 218303/218303 co-relation queries the response was YES. [2021-12-06 18:59:52,597 INFO L84 FinitePrefix]: Finished finitePrefix Result has 35448 conditions, 3696 events. 1328/3696 cut-off events. For 218303/218303 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 31754 event pairs, 74 based on Foata normal form. 4/3656 useless extension candidates. Maximal degree in co-relation 35295. Up to 608 conditions per place. [2021-12-06 18:59:52,621 INFO L132 encePairwiseOnDemand]: 66/87 looper letters, 283 selfloop transitions, 1254 changer transitions 19/1595 dead transitions. [2021-12-06 18:59:52,621 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 654 places, 1595 transitions, 35158 flow [2021-12-06 18:59:52,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-12-06 18:59:52,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2021-12-06 18:59:52,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 3187 transitions. [2021-12-06 18:59:52,624 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6105363984674329 [2021-12-06 18:59:52,624 INFO L72 ComplementDD]: Start complementDD. Operand 60 states and 3187 transitions. [2021-12-06 18:59:52,624 INFO L73 IsDeterministic]: Start isDeterministic. Operand 60 states and 3187 transitions. [2021-12-06 18:59:52,625 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 18:59:52,625 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 60 states and 3187 transitions. [2021-12-06 18:59:52,627 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 61 states, 60 states have (on average 53.11666666666667) internal successors, (3187), 60 states have internal predecessors, (3187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:52,630 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 61 states, 61 states have (on average 87.0) internal successors, (5307), 61 states have internal predecessors, (5307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:52,630 INFO L81 ComplementDD]: Finished complementDD. Result has 61 states, 61 states have (on average 87.0) internal successors, (5307), 61 states have internal predecessors, (5307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:52,630 INFO L186 Difference]: Start difference. First operand has 617 places, 1215 transitions, 24467 flow. Second operand 60 states and 3187 transitions. [2021-12-06 18:59:52,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 654 places, 1595 transitions, 35158 flow [2021-12-06 18:59:53,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 617 places, 1595 transitions, 34016 flow, removed 47 selfloop flow, removed 37 redundant places. [2021-12-06 18:59:53,493 INFO L242 Difference]: Finished difference. Result has 645 places, 1519 transitions, 33649 flow [2021-12-06 18:59:53,494 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=23623, PETRI_DIFFERENCE_MINUEND_PLACES=558, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=955, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=33649, PETRI_PLACES=645, PETRI_TRANSITIONS=1519} [2021-12-06 18:59:53,494 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 568 predicate places. [2021-12-06 18:59:53,494 INFO L470 AbstractCegarLoop]: Abstraction has has 645 places, 1519 transitions, 33649 flow [2021-12-06 18:59:53,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 50.705882352941174) internal successors, (1724), 34 states have internal predecessors, (1724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:53,494 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 18:59:53,495 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:59:53,514 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-12-06 18:59:53,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-12-06 18:59:53,696 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 18:59:53,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:59:53,697 INFO L85 PathProgramCache]: Analyzing trace with hash -1801555279, now seen corresponding path program 8 times [2021-12-06 18:59:53,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:59:53,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303470925] [2021-12-06 18:59:53,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:59:53,699 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:59:53,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:59:53,838 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:59:53,838 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:59:53,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303470925] [2021-12-06 18:59:53,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303470925] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:59:53,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627487171] [2021-12-06 18:59:53,839 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 18:59:53,839 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:59:53,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:59:53,839 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:59:53,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-06 18:59:53,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 18:59:53,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:59:53,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-06 18:59:53,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:59:54,105 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:59:54,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:59:54,462 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:59:54,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627487171] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:59:54,462 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:59:54,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2021-12-06 18:59:54,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834661947] [2021-12-06 18:59:54,462 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:59:54,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-06 18:59:54,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:59:54,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-06 18:59:54,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=971, Unknown=0, NotChecked=0, Total=1122 [2021-12-06 18:59:54,464 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2021-12-06 18:59:54,465 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 645 places, 1519 transitions, 33649 flow. Second operand has 34 states, 34 states have (on average 50.6764705882353) internal successors, (1723), 34 states have internal predecessors, (1723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:59:54,465 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 18:59:54,465 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2021-12-06 18:59:54,465 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 19:00:02,623 INFO L129 PetriNetUnfolder]: 1321/3637 cut-off events. [2021-12-06 19:00:02,623 INFO L130 PetriNetUnfolder]: For 254213/254213 co-relation queries the response was YES. [2021-12-06 19:00:02,664 INFO L84 FinitePrefix]: Finished finitePrefix Result has 38395 conditions, 3637 events. 1321/3637 cut-off events. For 254213/254213 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 31069 event pairs, 83 based on Foata normal form. 3/3597 useless extension candidates. Maximal degree in co-relation 38225. Up to 695 conditions per place. [2021-12-06 19:00:02,689 INFO L132 encePairwiseOnDemand]: 64/87 looper letters, 419 selfloop transitions, 1226 changer transitions 18/1702 dead transitions. [2021-12-06 19:00:02,690 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 832 places, 1702 transitions, 44320 flow [2021-12-06 19:00:02,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 191 states. [2021-12-06 19:00:02,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2021-12-06 19:00:02,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 10093 transitions. [2021-12-06 19:00:02,696 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6073900222663537 [2021-12-06 19:00:02,696 INFO L72 ComplementDD]: Start complementDD. Operand 191 states and 10093 transitions. [2021-12-06 19:00:02,696 INFO L73 IsDeterministic]: Start isDeterministic. Operand 191 states and 10093 transitions. [2021-12-06 19:00:02,698 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 19:00:02,698 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 191 states and 10093 transitions. [2021-12-06 19:00:02,707 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 192 states, 191 states have (on average 52.84293193717277) internal successors, (10093), 191 states have internal predecessors, (10093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:00:02,715 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 192 states, 192 states have (on average 87.0) internal successors, (16704), 192 states have internal predecessors, (16704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:00:02,717 INFO L81 ComplementDD]: Finished complementDD. Result has 192 states, 192 states have (on average 87.0) internal successors, (16704), 192 states have internal predecessors, (16704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:00:02,717 INFO L186 Difference]: Start difference. First operand has 645 places, 1519 transitions, 33649 flow. Second operand 191 states and 10093 transitions. [2021-12-06 19:00:02,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 832 places, 1702 transitions, 44320 flow [2021-12-06 19:00:03,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 814 places, 1702 transitions, 41311 flow, removed 1402 selfloop flow, removed 18 redundant places. [2021-12-06 19:00:04,007 INFO L242 Difference]: Finished difference. Result has 824 places, 1520 transitions, 35712 flow [2021-12-06 19:00:04,009 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=32956, PETRI_DIFFERENCE_MINUEND_PLACES=624, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1519, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1221, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=191, PETRI_FLOW=35712, PETRI_PLACES=824, PETRI_TRANSITIONS=1520} [2021-12-06 19:00:04,009 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 747 predicate places. [2021-12-06 19:00:04,009 INFO L470 AbstractCegarLoop]: Abstraction has has 824 places, 1520 transitions, 35712 flow [2021-12-06 19:00:04,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 50.6764705882353) internal successors, (1723), 34 states have internal predecessors, (1723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:00:04,009 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 19:00:04,009 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:00:04,028 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-12-06 19:00:04,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:00:04,211 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 19:00:04,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:00:04,212 INFO L85 PathProgramCache]: Analyzing trace with hash -57283793, now seen corresponding path program 9 times [2021-12-06 19:00:04,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:00:04,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656944696] [2021-12-06 19:00:04,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:00:04,214 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:00:04,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:00:04,346 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:00:04,346 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:00:04,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656944696] [2021-12-06 19:00:04,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656944696] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:00:04,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476123424] [2021-12-06 19:00:04,347 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 19:00:04,347 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:00:04,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:00:04,348 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:00:04,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-06 19:00:04,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-06 19:00:04,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:00:04,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-06 19:00:04,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:00:04,645 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:00:04,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:00:05,105 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:00:05,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476123424] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:00:05,105 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:00:05,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2021-12-06 19:00:05,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695040736] [2021-12-06 19:00:05,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:00:05,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-06 19:00:05,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:00:05,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-06 19:00:05,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=982, Unknown=0, NotChecked=0, Total=1122 [2021-12-06 19:00:05,108 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2021-12-06 19:00:05,109 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 824 places, 1520 transitions, 35712 flow. Second operand has 34 states, 34 states have (on average 50.794117647058826) internal successors, (1727), 34 states have internal predecessors, (1727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:00:05,109 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 19:00:05,109 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2021-12-06 19:00:05,109 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 19:00:08,306 INFO L129 PetriNetUnfolder]: 1320/3642 cut-off events. [2021-12-06 19:00:08,306 INFO L130 PetriNetUnfolder]: For 209225/209225 co-relation queries the response was YES. [2021-12-06 19:00:08,352 INFO L84 FinitePrefix]: Finished finitePrefix Result has 37354 conditions, 3642 events. 1320/3642 cut-off events. For 209225/209225 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 31183 event pairs, 71 based on Foata normal form. 1/3605 useless extension candidates. Maximal degree in co-relation 37179. Up to 466 conditions per place. [2021-12-06 19:00:08,378 INFO L132 encePairwiseOnDemand]: 66/87 looper letters, 272 selfloop transitions, 1268 changer transitions 9/1588 dead transitions. [2021-12-06 19:00:08,378 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 876 places, 1588 transitions, 40622 flow [2021-12-06 19:00:08,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-12-06 19:00:08,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2021-12-06 19:00:08,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 3178 transitions. [2021-12-06 19:00:08,381 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6088122605363985 [2021-12-06 19:00:08,381 INFO L72 ComplementDD]: Start complementDD. Operand 60 states and 3178 transitions. [2021-12-06 19:00:08,381 INFO L73 IsDeterministic]: Start isDeterministic. Operand 60 states and 3178 transitions. [2021-12-06 19:00:08,381 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 19:00:08,381 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 60 states and 3178 transitions. [2021-12-06 19:00:08,384 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 61 states, 60 states have (on average 52.96666666666667) internal successors, (3178), 60 states have internal predecessors, (3178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:00:08,386 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 61 states, 61 states have (on average 87.0) internal successors, (5307), 61 states have internal predecessors, (5307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:00:08,386 INFO L81 ComplementDD]: Finished complementDD. Result has 61 states, 61 states have (on average 87.0) internal successors, (5307), 61 states have internal predecessors, (5307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:00:08,387 INFO L186 Difference]: Start difference. First operand has 824 places, 1520 transitions, 35712 flow. Second operand 60 states and 3178 transitions. [2021-12-06 19:00:08,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 876 places, 1588 transitions, 40622 flow [2021-12-06 19:00:09,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 710 places, 1588 transitions, 37828 flow, removed 373 selfloop flow, removed 166 redundant places. [2021-12-06 19:00:09,537 INFO L242 Difference]: Finished difference. Result has 713 places, 1525 transitions, 36266 flow [2021-12-06 19:00:09,538 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=33590, PETRI_DIFFERENCE_MINUEND_PLACES=651, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1520, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1263, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=36266, PETRI_PLACES=713, PETRI_TRANSITIONS=1525} [2021-12-06 19:00:09,538 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 636 predicate places. [2021-12-06 19:00:09,538 INFO L470 AbstractCegarLoop]: Abstraction has has 713 places, 1525 transitions, 36266 flow [2021-12-06 19:00:09,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 50.794117647058826) internal successors, (1727), 34 states have internal predecessors, (1727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:00:09,538 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 19:00:09,538 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:00:09,557 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-12-06 19:00:09,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-12-06 19:00:09,740 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 19:00:09,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:00:09,741 INFO L85 PathProgramCache]: Analyzing trace with hash -670960933, now seen corresponding path program 10 times [2021-12-06 19:00:09,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:00:09,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358353684] [2021-12-06 19:00:09,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:00:09,742 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:00:09,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:00:09,885 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:00:09,885 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:00:09,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358353684] [2021-12-06 19:00:09,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358353684] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:00:09,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140687772] [2021-12-06 19:00:09,885 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 19:00:09,885 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:00:09,885 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:00:09,886 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:00:09,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-06 19:00:09,925 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 19:00:09,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:00:09,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-06 19:00:09,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:00:10,165 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:00:10,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:00:10,469 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:00:10,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140687772] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:00:10,469 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:00:10,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 33 [2021-12-06 19:00:10,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068480016] [2021-12-06 19:00:10,470 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:00:10,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-06 19:00:10,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:00:10,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-06 19:00:10,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=931, Unknown=0, NotChecked=0, Total=1056 [2021-12-06 19:00:10,471 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2021-12-06 19:00:10,472 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 713 places, 1525 transitions, 36266 flow. Second operand has 33 states, 33 states have (on average 50.90909090909091) internal successors, (1680), 33 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:00:10,472 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 19:00:10,472 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2021-12-06 19:00:10,472 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 19:00:15,513 INFO L129 PetriNetUnfolder]: 1498/3975 cut-off events. [2021-12-06 19:00:15,513 INFO L130 PetriNetUnfolder]: For 114939/114939 co-relation queries the response was YES. [2021-12-06 19:00:15,566 INFO L84 FinitePrefix]: Finished finitePrefix Result has 37865 conditions, 3975 events. 1498/3975 cut-off events. For 114939/114939 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 33741 event pairs, 133 based on Foata normal form. 9/3933 useless extension candidates. Maximal degree in co-relation 37693. Up to 889 conditions per place. [2021-12-06 19:00:15,595 INFO L132 encePairwiseOnDemand]: 69/87 looper letters, 738 selfloop transitions, 1112 changer transitions 29/1918 dead transitions. [2021-12-06 19:00:15,595 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 830 places, 1918 transitions, 48607 flow [2021-12-06 19:00:15,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2021-12-06 19:00:15,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2021-12-06 19:00:15,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 6475 transitions. [2021-12-06 19:00:15,599 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6100433389862446 [2021-12-06 19:00:15,599 INFO L72 ComplementDD]: Start complementDD. Operand 122 states and 6475 transitions. [2021-12-06 19:00:15,599 INFO L73 IsDeterministic]: Start isDeterministic. Operand 122 states and 6475 transitions. [2021-12-06 19:00:15,600 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 19:00:15,600 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 122 states and 6475 transitions. [2021-12-06 19:00:15,607 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 123 states, 122 states have (on average 53.07377049180328) internal successors, (6475), 122 states have internal predecessors, (6475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:00:15,612 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 123 states, 123 states have (on average 87.0) internal successors, (10701), 123 states have internal predecessors, (10701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:00:15,613 INFO L81 ComplementDD]: Finished complementDD. Result has 123 states, 123 states have (on average 87.0) internal successors, (10701), 123 states have internal predecessors, (10701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:00:15,613 INFO L186 Difference]: Start difference. First operand has 713 places, 1525 transitions, 36266 flow. Second operand 122 states and 6475 transitions. [2021-12-06 19:00:15,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 830 places, 1918 transitions, 48607 flow [2021-12-06 19:00:16,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 781 places, 1918 transitions, 45957 flow, removed 5 selfloop flow, removed 49 redundant places. [2021-12-06 19:00:16,677 INFO L242 Difference]: Finished difference. Result has 800 places, 1780 transitions, 42363 flow [2021-12-06 19:00:16,678 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=34176, PETRI_DIFFERENCE_MINUEND_PLACES=660, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1525, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=869, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=643, PETRI_DIFFERENCE_SUBTRAHEND_STATES=122, PETRI_FLOW=42363, PETRI_PLACES=800, PETRI_TRANSITIONS=1780} [2021-12-06 19:00:16,678 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 723 predicate places. [2021-12-06 19:00:16,679 INFO L470 AbstractCegarLoop]: Abstraction has has 800 places, 1780 transitions, 42363 flow [2021-12-06 19:00:16,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 50.90909090909091) internal successors, (1680), 33 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:00:16,679 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 19:00:16,679 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:00:16,698 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-12-06 19:00:16,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-12-06 19:00:16,880 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 19:00:16,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:00:16,881 INFO L85 PathProgramCache]: Analyzing trace with hash 158561573, now seen corresponding path program 11 times [2021-12-06 19:00:16,882 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:00:16,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352686183] [2021-12-06 19:00:16,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:00:16,882 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:00:16,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:00:17,006 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:00:17,006 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:00:17,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352686183] [2021-12-06 19:00:17,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352686183] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:00:17,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960023425] [2021-12-06 19:00:17,006 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 19:00:17,006 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:00:17,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:00:17,007 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:00:17,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-06 19:00:17,051 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 19:00:17,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:00:17,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-06 19:00:17,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:00:17,271 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:00:17,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:00:17,663 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:00:17,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960023425] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:00:17,663 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:00:17,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2021-12-06 19:00:17,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926460448] [2021-12-06 19:00:17,663 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:00:17,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-06 19:00:17,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:00:17,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-06 19:00:17,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=987, Unknown=0, NotChecked=0, Total=1122 [2021-12-06 19:00:17,665 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2021-12-06 19:00:17,666 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 800 places, 1780 transitions, 42363 flow. Second operand has 34 states, 34 states have (on average 50.73529411764706) internal successors, (1725), 34 states have internal predecessors, (1725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:00:17,666 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 19:00:17,666 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2021-12-06 19:00:17,666 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 19:00:22,511 INFO L129 PetriNetUnfolder]: 1526/4066 cut-off events. [2021-12-06 19:00:22,512 INFO L130 PetriNetUnfolder]: For 127514/127514 co-relation queries the response was YES. [2021-12-06 19:00:22,561 INFO L84 FinitePrefix]: Finished finitePrefix Result has 38865 conditions, 4066 events. 1526/4066 cut-off events. For 127514/127514 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 35016 event pairs, 99 based on Foata normal form. 3/4017 useless extension candidates. Maximal degree in co-relation 38677. Up to 826 conditions per place. [2021-12-06 19:00:22,588 INFO L132 encePairwiseOnDemand]: 65/87 looper letters, 504 selfloop transitions, 1391 changer transitions 31/1965 dead transitions. [2021-12-06 19:00:22,588 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 888 places, 1965 transitions, 49954 flow [2021-12-06 19:00:22,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-12-06 19:00:22,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2021-12-06 19:00:22,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 5100 transitions. [2021-12-06 19:00:22,591 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.617059891107078 [2021-12-06 19:00:22,591 INFO L72 ComplementDD]: Start complementDD. Operand 95 states and 5100 transitions. [2021-12-06 19:00:22,591 INFO L73 IsDeterministic]: Start isDeterministic. Operand 95 states and 5100 transitions. [2021-12-06 19:00:22,592 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 19:00:22,592 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 95 states and 5100 transitions. [2021-12-06 19:00:22,595 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 96 states, 95 states have (on average 53.68421052631579) internal successors, (5100), 95 states have internal predecessors, (5100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:00:22,598 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 96 states, 96 states have (on average 87.0) internal successors, (8352), 96 states have internal predecessors, (8352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:00:22,599 INFO L81 ComplementDD]: Finished complementDD. Result has 96 states, 96 states have (on average 87.0) internal successors, (8352), 96 states have internal predecessors, (8352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:00:22,599 INFO L186 Difference]: Start difference. First operand has 800 places, 1780 transitions, 42363 flow. Second operand 95 states and 5100 transitions. [2021-12-06 19:00:22,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 888 places, 1965 transitions, 49954 flow [2021-12-06 19:00:23,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 849 places, 1965 transitions, 48758 flow, removed 101 selfloop flow, removed 39 redundant places. [2021-12-06 19:00:23,812 INFO L242 Difference]: Finished difference. Result has 870 places, 1810 transitions, 45215 flow [2021-12-06 19:00:23,813 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=41241, PETRI_DIFFERENCE_MINUEND_PLACES=755, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1780, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1361, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=95, PETRI_FLOW=45215, PETRI_PLACES=870, PETRI_TRANSITIONS=1810} [2021-12-06 19:00:23,814 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 793 predicate places. [2021-12-06 19:00:23,814 INFO L470 AbstractCegarLoop]: Abstraction has has 870 places, 1810 transitions, 45215 flow [2021-12-06 19:00:23,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 50.73529411764706) internal successors, (1725), 34 states have internal predecessors, (1725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:00:23,814 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 19:00:23,814 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:00:23,845 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-12-06 19:00:24,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:00:24,015 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 19:00:24,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:00:24,017 INFO L85 PathProgramCache]: Analyzing trace with hash -917611729, now seen corresponding path program 12 times [2021-12-06 19:00:24,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:00:24,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548012177] [2021-12-06 19:00:24,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:00:24,018 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:00:24,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:00:24,142 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:00:24,142 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:00:24,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548012177] [2021-12-06 19:00:24,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548012177] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:00:24,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719317481] [2021-12-06 19:00:24,143 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 19:00:24,143 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:00:24,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:00:24,144 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:00:24,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-06 19:00:24,187 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-12-06 19:00:24,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:00:24,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-06 19:00:24,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:00:24,429 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:00:24,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:00:24,858 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:00:24,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719317481] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:00:24,858 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:00:24,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2021-12-06 19:00:24,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874880259] [2021-12-06 19:00:24,858 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:00:24,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-06 19:00:24,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:00:24,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-06 19:00:24,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=991, Unknown=0, NotChecked=0, Total=1122 [2021-12-06 19:00:24,861 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2021-12-06 19:00:24,862 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 870 places, 1810 transitions, 45215 flow. Second operand has 34 states, 34 states have (on average 50.794117647058826) internal successors, (1727), 34 states have internal predecessors, (1727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:00:24,862 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 19:00:24,862 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2021-12-06 19:00:24,862 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 19:00:31,674 INFO L129 PetriNetUnfolder]: 1548/4129 cut-off events. [2021-12-06 19:00:31,674 INFO L130 PetriNetUnfolder]: For 144919/144919 co-relation queries the response was YES. [2021-12-06 19:00:31,734 INFO L84 FinitePrefix]: Finished finitePrefix Result has 41133 conditions, 4129 events. 1548/4129 cut-off events. For 144919/144919 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 35881 event pairs, 104 based on Foata normal form. 3/4079 useless extension candidates. Maximal degree in co-relation 40932. Up to 922 conditions per place. [2021-12-06 19:00:31,764 INFO L132 encePairwiseOnDemand]: 65/87 looper letters, 391 selfloop transitions, 1511 changer transitions 38/1979 dead transitions. [2021-12-06 19:00:31,764 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1006 places, 1979 transitions, 52607 flow [2021-12-06 19:00:31,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2021-12-06 19:00:31,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2021-12-06 19:00:31,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 7704 transitions. [2021-12-06 19:00:31,768 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6065186584789797 [2021-12-06 19:00:31,768 INFO L72 ComplementDD]: Start complementDD. Operand 146 states and 7704 transitions. [2021-12-06 19:00:31,768 INFO L73 IsDeterministic]: Start isDeterministic. Operand 146 states and 7704 transitions. [2021-12-06 19:00:31,769 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 19:00:31,769 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 146 states and 7704 transitions. [2021-12-06 19:00:31,774 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 147 states, 146 states have (on average 52.76712328767123) internal successors, (7704), 146 states have internal predecessors, (7704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:00:31,780 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 147 states, 147 states have (on average 87.0) internal successors, (12789), 147 states have internal predecessors, (12789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:00:31,781 INFO L81 ComplementDD]: Finished complementDD. Result has 147 states, 147 states have (on average 87.0) internal successors, (12789), 147 states have internal predecessors, (12789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:00:31,781 INFO L186 Difference]: Start difference. First operand has 870 places, 1810 transitions, 45215 flow. Second operand 146 states and 7704 transitions. [2021-12-06 19:00:31,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1006 places, 1979 transitions, 52607 flow [2021-12-06 19:00:33,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 931 places, 1979 transitions, 50212 flow, removed 78 selfloop flow, removed 75 redundant places. [2021-12-06 19:00:33,247 INFO L242 Difference]: Finished difference. Result has 949 places, 1818 transitions, 46679 flow [2021-12-06 19:00:33,248 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=42908, PETRI_DIFFERENCE_MINUEND_PLACES=786, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1810, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1493, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=146, PETRI_FLOW=46679, PETRI_PLACES=949, PETRI_TRANSITIONS=1818} [2021-12-06 19:00:33,249 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 872 predicate places. [2021-12-06 19:00:33,249 INFO L470 AbstractCegarLoop]: Abstraction has has 949 places, 1818 transitions, 46679 flow [2021-12-06 19:00:33,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 50.794117647058826) internal successors, (1727), 34 states have internal predecessors, (1727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:00:33,249 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 19:00:33,249 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:00:33,268 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-12-06 19:00:33,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:00:33,450 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 19:00:33,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:00:33,452 INFO L85 PathProgramCache]: Analyzing trace with hash -704375683, now seen corresponding path program 13 times [2021-12-06 19:00:33,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:00:33,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79532403] [2021-12-06 19:00:33,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:00:33,454 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:00:33,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:00:33,578 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:00:33,578 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:00:33,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79532403] [2021-12-06 19:00:33,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79532403] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:00:33,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208577994] [2021-12-06 19:00:33,578 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 19:00:33,578 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:00:33,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:00:33,579 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:00:33,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-06 19:00:33,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:00:33,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-06 19:00:33,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:00:33,849 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:00:33,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:00:34,250 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:00:34,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208577994] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:00:34,250 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:00:34,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2021-12-06 19:00:34,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775694483] [2021-12-06 19:00:34,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:00:34,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-06 19:00:34,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:00:34,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-06 19:00:34,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=985, Unknown=0, NotChecked=0, Total=1122 [2021-12-06 19:00:34,252 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2021-12-06 19:00:34,253 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 949 places, 1818 transitions, 46679 flow. Second operand has 34 states, 34 states have (on average 50.794117647058826) internal successors, (1727), 34 states have internal predecessors, (1727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:00:34,253 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 19:00:34,253 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2021-12-06 19:00:34,253 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 19:00:39,194 INFO L129 PetriNetUnfolder]: 1550/4131 cut-off events. [2021-12-06 19:00:39,194 INFO L130 PetriNetUnfolder]: For 156018/156018 co-relation queries the response was YES. [2021-12-06 19:00:39,289 INFO L84 FinitePrefix]: Finished finitePrefix Result has 42141 conditions, 4131 events. 1550/4131 cut-off events. For 156018/156018 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 35912 event pairs, 93 based on Foata normal form. 3/4089 useless extension candidates. Maximal degree in co-relation 41934. Up to 878 conditions per place. [2021-12-06 19:00:39,319 INFO L132 encePairwiseOnDemand]: 65/87 looper letters, 523 selfloop transitions, 1380 changer transitions 38/1980 dead transitions. [2021-12-06 19:00:39,319 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1028 places, 1980 transitions, 53855 flow [2021-12-06 19:00:39,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-12-06 19:00:39,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2021-12-06 19:00:39,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 4998 transitions. [2021-12-06 19:00:39,321 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.617723396366333 [2021-12-06 19:00:39,322 INFO L72 ComplementDD]: Start complementDD. Operand 93 states and 4998 transitions. [2021-12-06 19:00:39,322 INFO L73 IsDeterministic]: Start isDeterministic. Operand 93 states and 4998 transitions. [2021-12-06 19:00:39,322 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 19:00:39,322 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 93 states and 4998 transitions. [2021-12-06 19:00:39,326 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 94 states, 93 states have (on average 53.74193548387097) internal successors, (4998), 93 states have internal predecessors, (4998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:00:39,329 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 94 states, 94 states have (on average 87.0) internal successors, (8178), 94 states have internal predecessors, (8178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:00:39,329 INFO L81 ComplementDD]: Finished complementDD. Result has 94 states, 94 states have (on average 87.0) internal successors, (8178), 94 states have internal predecessors, (8178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:00:39,329 INFO L186 Difference]: Start difference. First operand has 949 places, 1818 transitions, 46679 flow. Second operand 93 states and 4998 transitions. [2021-12-06 19:00:39,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1028 places, 1980 transitions, 53855 flow [2021-12-06 19:00:40,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 894 places, 1980 transitions, 51072 flow, removed 62 selfloop flow, removed 134 redundant places. [2021-12-06 19:00:40,827 INFO L242 Difference]: Finished difference. Result has 913 places, 1818 transitions, 47226 flow [2021-12-06 19:00:40,828 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=43954, PETRI_DIFFERENCE_MINUEND_PLACES=802, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1818, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1369, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=444, PETRI_DIFFERENCE_SUBTRAHEND_STATES=93, PETRI_FLOW=47226, PETRI_PLACES=913, PETRI_TRANSITIONS=1818} [2021-12-06 19:00:40,828 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 836 predicate places. [2021-12-06 19:00:40,828 INFO L470 AbstractCegarLoop]: Abstraction has has 913 places, 1818 transitions, 47226 flow [2021-12-06 19:00:40,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 50.794117647058826) internal successors, (1727), 34 states have internal predecessors, (1727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:00:40,829 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 19:00:40,829 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:00:40,848 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-12-06 19:00:41,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:00:41,030 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 19:00:41,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:00:41,031 INFO L85 PathProgramCache]: Analyzing trace with hash -1474262661, now seen corresponding path program 14 times [2021-12-06 19:00:41,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:00:41,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102489114] [2021-12-06 19:00:41,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:00:41,033 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:00:41,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:00:41,154 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:00:41,154 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:00:41,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102489114] [2021-12-06 19:00:41,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102489114] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:00:41,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471709793] [2021-12-06 19:00:41,154 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 19:00:41,155 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:00:41,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:00:41,155 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:00:41,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-06 19:00:41,196 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 19:00:41,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:00:41,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-06 19:00:41,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:00:41,421 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:00:41,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:00:41,781 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:00:41,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471709793] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:00:41,781 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:00:41,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2021-12-06 19:00:41,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512982990] [2021-12-06 19:00:41,782 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:00:41,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-06 19:00:41,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:00:41,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-06 19:00:41,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=973, Unknown=0, NotChecked=0, Total=1122 [2021-12-06 19:00:41,783 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2021-12-06 19:00:41,784 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 913 places, 1818 transitions, 47226 flow. Second operand has 34 states, 34 states have (on average 50.794117647058826) internal successors, (1727), 34 states have internal predecessors, (1727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:00:41,784 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 19:00:41,784 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2021-12-06 19:00:41,784 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 19:00:45,613 INFO L129 PetriNetUnfolder]: 1532/4111 cut-off events. [2021-12-06 19:00:45,614 INFO L130 PetriNetUnfolder]: For 172052/172052 co-relation queries the response was YES. [2021-12-06 19:00:45,678 INFO L84 FinitePrefix]: Finished finitePrefix Result has 42655 conditions, 4111 events. 1532/4111 cut-off events. For 172052/172052 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 35707 event pairs, 90 based on Foata normal form. 1/4076 useless extension candidates. Maximal degree in co-relation 42443. Up to 745 conditions per place. [2021-12-06 19:00:45,714 INFO L132 encePairwiseOnDemand]: 66/87 looper letters, 291 selfloop transitions, 1510 changer transitions 28/1868 dead transitions. [2021-12-06 19:00:45,714 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 954 places, 1868 transitions, 51908 flow [2021-12-06 19:00:45,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-12-06 19:00:45,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2021-12-06 19:00:45,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 3074 transitions. [2021-12-06 19:00:45,717 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6091954022988506 [2021-12-06 19:00:45,717 INFO L72 ComplementDD]: Start complementDD. Operand 58 states and 3074 transitions. [2021-12-06 19:00:45,717 INFO L73 IsDeterministic]: Start isDeterministic. Operand 58 states and 3074 transitions. [2021-12-06 19:00:45,718 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 19:00:45,718 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 58 states and 3074 transitions. [2021-12-06 19:00:45,721 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 59 states, 58 states have (on average 53.0) internal successors, (3074), 58 states have internal predecessors, (3074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:00:45,723 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 59 states, 59 states have (on average 87.0) internal successors, (5133), 59 states have internal predecessors, (5133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:00:45,724 INFO L81 ComplementDD]: Finished complementDD. Result has 59 states, 59 states have (on average 87.0) internal successors, (5133), 59 states have internal predecessors, (5133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:00:45,724 INFO L186 Difference]: Start difference. First operand has 913 places, 1818 transitions, 47226 flow. Second operand 58 states and 3074 transitions. [2021-12-06 19:00:45,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 954 places, 1868 transitions, 51908 flow [2021-12-06 19:00:47,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 870 places, 1868 transitions, 49292 flow, removed 70 selfloop flow, removed 84 redundant places. [2021-12-06 19:00:47,450 INFO L242 Difference]: Finished difference. Result has 873 places, 1795 transitions, 47136 flow [2021-12-06 19:00:47,452 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=44654, PETRI_DIFFERENCE_MINUEND_PLACES=813, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1818, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1510, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=58, PETRI_FLOW=47136, PETRI_PLACES=873, PETRI_TRANSITIONS=1795} [2021-12-06 19:00:47,452 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 796 predicate places. [2021-12-06 19:00:47,452 INFO L470 AbstractCegarLoop]: Abstraction has has 873 places, 1795 transitions, 47136 flow [2021-12-06 19:00:47,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 50.794117647058826) internal successors, (1727), 34 states have internal predecessors, (1727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:00:47,452 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 19:00:47,452 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:00:47,471 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-12-06 19:00:47,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:00:47,654 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 19:00:47,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:00:47,655 INFO L85 PathProgramCache]: Analyzing trace with hash 985832681, now seen corresponding path program 15 times [2021-12-06 19:00:47,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:00:47,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108644819] [2021-12-06 19:00:47,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:00:47,656 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:00:47,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:00:47,778 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:00:47,778 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:00:47,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108644819] [2021-12-06 19:00:47,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108644819] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:00:47,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353915334] [2021-12-06 19:00:47,779 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 19:00:47,779 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:00:47,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:00:47,780 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:00:47,781 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-06 19:00:47,833 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-06 19:00:47,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:00:47,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-06 19:00:47,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:00:48,032 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:00:48,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:00:48,366 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:00:48,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353915334] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:00:48,366 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:00:48,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2021-12-06 19:00:48,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886254289] [2021-12-06 19:00:48,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:00:48,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-06 19:00:48,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:00:48,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-06 19:00:48,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=995, Unknown=0, NotChecked=0, Total=1122 [2021-12-06 19:00:48,368 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2021-12-06 19:00:48,369 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 873 places, 1795 transitions, 47136 flow. Second operand has 34 states, 34 states have (on average 50.6764705882353) internal successors, (1723), 34 states have internal predecessors, (1723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:00:48,369 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 19:00:48,369 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2021-12-06 19:00:48,369 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 19:00:52,413 INFO L129 PetriNetUnfolder]: 1743/4441 cut-off events. [2021-12-06 19:00:52,413 INFO L130 PetriNetUnfolder]: For 180588/180588 co-relation queries the response was YES. [2021-12-06 19:00:52,474 INFO L84 FinitePrefix]: Finished finitePrefix Result has 48716 conditions, 4441 events. 1743/4441 cut-off events. For 180588/180588 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 38002 event pairs, 121 based on Foata normal form. 1/4392 useless extension candidates. Maximal degree in co-relation 48512. Up to 1046 conditions per place. [2021-12-06 19:00:52,508 INFO L132 encePairwiseOnDemand]: 67/87 looper letters, 720 selfloop transitions, 1430 changer transitions 9/2198 dead transitions. [2021-12-06 19:00:52,508 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 916 places, 2198 transitions, 62023 flow [2021-12-06 19:00:52,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-12-06 19:00:52,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2021-12-06 19:00:52,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 2837 transitions. [2021-12-06 19:00:52,510 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6152678377792236 [2021-12-06 19:00:52,510 INFO L72 ComplementDD]: Start complementDD. Operand 53 states and 2837 transitions. [2021-12-06 19:00:52,510 INFO L73 IsDeterministic]: Start isDeterministic. Operand 53 states and 2837 transitions. [2021-12-06 19:00:52,510 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 19:00:52,510 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 53 states and 2837 transitions. [2021-12-06 19:00:52,512 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 54 states, 53 states have (on average 53.528301886792455) internal successors, (2837), 53 states have internal predecessors, (2837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:00:52,514 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 54 states, 54 states have (on average 87.0) internal successors, (4698), 54 states have internal predecessors, (4698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:00:52,514 INFO L81 ComplementDD]: Finished complementDD. Result has 54 states, 54 states have (on average 87.0) internal successors, (4698), 54 states have internal predecessors, (4698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:00:52,514 INFO L186 Difference]: Start difference. First operand has 873 places, 1795 transitions, 47136 flow. Second operand 53 states and 2837 transitions. [2021-12-06 19:00:52,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 916 places, 2198 transitions, 62023 flow [2021-12-06 19:00:54,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 858 places, 2198 transitions, 58282 flow, removed 15 selfloop flow, removed 58 redundant places. [2021-12-06 19:00:54,390 INFO L242 Difference]: Finished difference. Result has 888 places, 2104 transitions, 57269 flow [2021-12-06 19:00:54,392 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=44097, PETRI_DIFFERENCE_MINUEND_PLACES=806, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1795, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=547, PETRI_DIFFERENCE_SUBTRAHEND_STATES=53, PETRI_FLOW=57269, PETRI_PLACES=888, PETRI_TRANSITIONS=2104} [2021-12-06 19:00:54,392 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 811 predicate places. [2021-12-06 19:00:54,392 INFO L470 AbstractCegarLoop]: Abstraction has has 888 places, 2104 transitions, 57269 flow [2021-12-06 19:00:54,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 50.6764705882353) internal successors, (1723), 34 states have internal predecessors, (1723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:00:54,393 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 19:00:54,393 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:00:54,412 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-12-06 19:00:54,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:00:54,594 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 19:00:54,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:00:54,595 INFO L85 PathProgramCache]: Analyzing trace with hash -2133095729, now seen corresponding path program 16 times [2021-12-06 19:00:54,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:00:54,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965571535] [2021-12-06 19:00:54,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:00:54,596 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:00:54,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:00:54,729 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:00:54,729 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:00:54,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965571535] [2021-12-06 19:00:54,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965571535] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:00:54,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134424190] [2021-12-06 19:00:54,730 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 19:00:54,730 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:00:54,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:00:54,730 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:00:54,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-06 19:00:54,772 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 19:00:54,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:00:54,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-06 19:00:54,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:00:54,973 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:00:54,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:00:55,224 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:00:55,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134424190] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:00:55,225 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:00:55,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 32 [2021-12-06 19:00:55,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147923912] [2021-12-06 19:00:55,225 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:00:55,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-06 19:00:55,225 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:00:55,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-06 19:00:55,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=885, Unknown=0, NotChecked=0, Total=992 [2021-12-06 19:00:55,227 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2021-12-06 19:00:55,228 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 888 places, 2104 transitions, 57269 flow. Second operand has 32 states, 32 states have (on average 50.78125) internal successors, (1625), 32 states have internal predecessors, (1625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:00:55,228 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 19:00:55,228 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2021-12-06 19:00:55,228 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 19:00:59,691 INFO L129 PetriNetUnfolder]: 1870/4713 cut-off events. [2021-12-06 19:00:59,691 INFO L130 PetriNetUnfolder]: For 206760/206760 co-relation queries the response was YES. [2021-12-06 19:00:59,763 INFO L84 FinitePrefix]: Finished finitePrefix Result has 52930 conditions, 4713 events. 1870/4713 cut-off events. For 206760/206760 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 40451 event pairs, 135 based on Foata normal form. 3/4664 useless extension candidates. Maximal degree in co-relation 52700. Up to 1511 conditions per place. [2021-12-06 19:00:59,802 INFO L132 encePairwiseOnDemand]: 68/87 looper letters, 1239 selfloop transitions, 1124 changer transitions 14/2416 dead transitions. [2021-12-06 19:00:59,802 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 934 places, 2416 transitions, 69393 flow [2021-12-06 19:00:59,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-12-06 19:00:59,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2021-12-06 19:00:59,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 2741 transitions. [2021-12-06 19:00:59,804 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6058797524314765 [2021-12-06 19:00:59,804 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 2741 transitions. [2021-12-06 19:00:59,804 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 2741 transitions. [2021-12-06 19:00:59,805 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 19:00:59,805 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 2741 transitions. [2021-12-06 19:00:59,806 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 52.71153846153846) internal successors, (2741), 52 states have internal predecessors, (2741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:00:59,808 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 87.0) internal successors, (4611), 53 states have internal predecessors, (4611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:00:59,808 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 87.0) internal successors, (4611), 53 states have internal predecessors, (4611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:00:59,809 INFO L186 Difference]: Start difference. First operand has 888 places, 2104 transitions, 57269 flow. Second operand 52 states and 2741 transitions. [2021-12-06 19:00:59,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 934 places, 2416 transitions, 69393 flow [2021-12-06 19:01:02,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 923 places, 2416 transitions, 69220 flow, removed 23 selfloop flow, removed 11 redundant places. [2021-12-06 19:01:02,114 INFO L242 Difference]: Finished difference. Result has 943 places, 2324 transitions, 65734 flow [2021-12-06 19:01:02,115 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=57116, PETRI_DIFFERENCE_MINUEND_PLACES=872, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=928, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=65734, PETRI_PLACES=943, PETRI_TRANSITIONS=2324} [2021-12-06 19:01:02,116 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 866 predicate places. [2021-12-06 19:01:02,116 INFO L470 AbstractCegarLoop]: Abstraction has has 943 places, 2324 transitions, 65734 flow [2021-12-06 19:01:02,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 50.78125) internal successors, (1625), 32 states have internal predecessors, (1625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:01:02,116 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 19:01:02,116 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:01:02,135 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2021-12-06 19:01:02,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:01:02,317 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 19:01:02,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:01:02,318 INFO L85 PathProgramCache]: Analyzing trace with hash -697612413, now seen corresponding path program 17 times [2021-12-06 19:01:02,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:01:02,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453574859] [2021-12-06 19:01:02,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:01:02,319 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:01:02,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:01:02,424 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:01:02,424 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:01:02,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453574859] [2021-12-06 19:01:02,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453574859] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:01:02,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231918065] [2021-12-06 19:01:02,424 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 19:01:02,424 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:01:02,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:01:02,425 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:01:02,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-06 19:01:02,467 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-12-06 19:01:02,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:01:02,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-06 19:01:02,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:01:02,665 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:01:02,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:01:02,949 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:01:02,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231918065] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:01:02,949 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:01:02,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 33 [2021-12-06 19:01:02,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815842783] [2021-12-06 19:01:02,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:01:02,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-06 19:01:02,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:01:02,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-06 19:01:02,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=929, Unknown=0, NotChecked=0, Total=1056 [2021-12-06 19:01:02,951 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2021-12-06 19:01:02,952 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 943 places, 2324 transitions, 65734 flow. Second operand has 33 states, 33 states have (on average 50.72727272727273) internal successors, (1674), 33 states have internal predecessors, (1674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:01:02,952 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 19:01:02,952 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2021-12-06 19:01:02,952 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 19:01:08,582 INFO L129 PetriNetUnfolder]: 2281/5535 cut-off events. [2021-12-06 19:01:08,583 INFO L130 PetriNetUnfolder]: For 252880/252880 co-relation queries the response was YES. [2021-12-06 19:01:08,683 INFO L84 FinitePrefix]: Finished finitePrefix Result has 65723 conditions, 5535 events. 2281/5535 cut-off events. For 252880/252880 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 47627 event pairs, 126 based on Foata normal form. 1/5486 useless extension candidates. Maximal degree in co-relation 65475. Up to 1039 conditions per place. [2021-12-06 19:01:08,739 INFO L132 encePairwiseOnDemand]: 68/87 looper letters, 778 selfloop transitions, 2214 changer transitions 9/3040 dead transitions. [2021-12-06 19:01:08,739 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 991 places, 3040 transitions, 90379 flow [2021-12-06 19:01:08,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-12-06 19:01:08,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2021-12-06 19:01:08,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 2928 transitions. [2021-12-06 19:01:08,743 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6119122257053291 [2021-12-06 19:01:08,743 INFO L72 ComplementDD]: Start complementDD. Operand 55 states and 2928 transitions. [2021-12-06 19:01:08,743 INFO L73 IsDeterministic]: Start isDeterministic. Operand 55 states and 2928 transitions. [2021-12-06 19:01:08,743 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 19:01:08,743 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 55 states and 2928 transitions. [2021-12-06 19:01:08,746 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 56 states, 55 states have (on average 53.236363636363635) internal successors, (2928), 55 states have internal predecessors, (2928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:01:08,749 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 56 states, 56 states have (on average 87.0) internal successors, (4872), 56 states have internal predecessors, (4872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:01:08,749 INFO L81 ComplementDD]: Finished complementDD. Result has 56 states, 56 states have (on average 87.0) internal successors, (4872), 56 states have internal predecessors, (4872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:01:08,749 INFO L186 Difference]: Start difference. First operand has 943 places, 2324 transitions, 65734 flow. Second operand 55 states and 2928 transitions. [2021-12-06 19:01:08,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 991 places, 3040 transitions, 90379 flow [2021-12-06 19:01:12,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 980 places, 3040 transitions, 90130 flow, removed 63 selfloop flow, removed 11 redundant places. [2021-12-06 19:01:12,293 INFO L242 Difference]: Finished difference. Result has 998 places, 2953 transitions, 88758 flow [2021-12-06 19:01:12,295 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=65515, PETRI_DIFFERENCE_MINUEND_PLACES=926, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1656, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=581, PETRI_DIFFERENCE_SUBTRAHEND_STATES=55, PETRI_FLOW=88758, PETRI_PLACES=998, PETRI_TRANSITIONS=2953} [2021-12-06 19:01:12,295 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 921 predicate places. [2021-12-06 19:01:12,295 INFO L470 AbstractCegarLoop]: Abstraction has has 998 places, 2953 transitions, 88758 flow [2021-12-06 19:01:12,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 50.72727272727273) internal successors, (1674), 33 states have internal predecessors, (1674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:01:12,296 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 19:01:12,296 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:01:12,315 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-12-06 19:01:12,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-12-06 19:01:12,497 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 19:01:12,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:01:12,497 INFO L85 PathProgramCache]: Analyzing trace with hash -1752543035, now seen corresponding path program 18 times [2021-12-06 19:01:12,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:01:12,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704132191] [2021-12-06 19:01:12,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:01:12,498 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:01:12,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:01:12,601 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:01:12,601 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:01:12,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704132191] [2021-12-06 19:01:12,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704132191] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:01:12,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442064144] [2021-12-06 19:01:12,601 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 19:01:12,601 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:01:12,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:01:12,602 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:01:12,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-06 19:01:12,646 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-12-06 19:01:12,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:01:12,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-06 19:01:12,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:01:12,844 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:01:12,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:01:13,132 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:01:13,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442064144] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:01:13,133 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:01:13,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 33 [2021-12-06 19:01:13,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814570816] [2021-12-06 19:01:13,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:01:13,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-06 19:01:13,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:01:13,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-06 19:01:13,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=919, Unknown=0, NotChecked=0, Total=1056 [2021-12-06 19:01:13,135 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2021-12-06 19:01:13,136 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 998 places, 2953 transitions, 88758 flow. Second operand has 33 states, 33 states have (on average 50.84848484848485) internal successors, (1678), 33 states have internal predecessors, (1678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:01:13,136 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 19:01:13,136 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2021-12-06 19:01:13,137 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 19:01:19,174 INFO L129 PetriNetUnfolder]: 2281/5559 cut-off events. [2021-12-06 19:01:19,174 INFO L130 PetriNetUnfolder]: For 280993/280993 co-relation queries the response was YES. [2021-12-06 19:01:19,274 INFO L84 FinitePrefix]: Finished finitePrefix Result has 69441 conditions, 5559 events. 2281/5559 cut-off events. For 280993/280993 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 48040 event pairs, 151 based on Foata normal form. 1/5509 useless extension candidates. Maximal degree in co-relation 69181. Up to 1158 conditions per place. [2021-12-06 19:01:19,325 INFO L132 encePairwiseOnDemand]: 68/87 looper letters, 1100 selfloop transitions, 1838 changer transitions 35/3012 dead transitions. [2021-12-06 19:01:19,325 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1023 places, 3012 transitions, 95983 flow [2021-12-06 19:01:19,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-06 19:01:19,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-12-06 19:01:19,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1618 transitions. [2021-12-06 19:01:19,326 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6199233716475095 [2021-12-06 19:01:19,327 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1618 transitions. [2021-12-06 19:01:19,327 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1618 transitions. [2021-12-06 19:01:19,327 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 19:01:19,327 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1618 transitions. [2021-12-06 19:01:19,328 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 53.93333333333333) internal successors, (1618), 30 states have internal predecessors, (1618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:01:19,329 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 87.0) internal successors, (2697), 31 states have internal predecessors, (2697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:01:19,329 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 87.0) internal successors, (2697), 31 states have internal predecessors, (2697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:01:19,329 INFO L186 Difference]: Start difference. First operand has 998 places, 2953 transitions, 88758 flow. Second operand 30 states and 1618 transitions. [2021-12-06 19:01:19,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1023 places, 3012 transitions, 95983 flow [2021-12-06 19:01:23,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1005 places, 3012 transitions, 94936 flow, removed 154 selfloop flow, removed 18 redundant places. [2021-12-06 19:01:23,171 INFO L242 Difference]: Finished difference. Result has 1013 places, 2949 transitions, 91479 flow [2021-12-06 19:01:23,173 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=87723, PETRI_DIFFERENCE_MINUEND_PLACES=976, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2953, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1832, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=91479, PETRI_PLACES=1013, PETRI_TRANSITIONS=2949} [2021-12-06 19:01:23,174 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 936 predicate places. [2021-12-06 19:01:23,174 INFO L470 AbstractCegarLoop]: Abstraction has has 1013 places, 2949 transitions, 91479 flow [2021-12-06 19:01:23,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 50.84848484848485) internal successors, (1678), 33 states have internal predecessors, (1678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:01:23,174 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 19:01:23,174 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:01:23,193 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-12-06 19:01:23,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:01:23,375 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 19:01:23,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:01:23,376 INFO L85 PathProgramCache]: Analyzing trace with hash -248658699, now seen corresponding path program 19 times [2021-12-06 19:01:23,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:01:23,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490473840] [2021-12-06 19:01:23,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:01:23,377 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:01:23,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:01:23,474 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:01:23,474 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:01:23,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490473840] [2021-12-06 19:01:23,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490473840] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:01:23,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154529790] [2021-12-06 19:01:23,474 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 19:01:23,475 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:01:23,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:01:23,475 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:01:23,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-12-06 19:01:23,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:01:23,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-06 19:01:23,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:01:23,747 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:01:23,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:01:24,139 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:01:24,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154529790] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:01:24,139 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:01:24,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2021-12-06 19:01:24,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467925351] [2021-12-06 19:01:24,140 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:01:24,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-06 19:01:24,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:01:24,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-06 19:01:24,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=990, Unknown=0, NotChecked=0, Total=1122 [2021-12-06 19:01:24,141 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2021-12-06 19:01:24,142 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1013 places, 2949 transitions, 91479 flow. Second operand has 34 states, 34 states have (on average 50.794117647058826) internal successors, (1727), 34 states have internal predecessors, (1727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:01:24,142 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 19:01:24,142 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2021-12-06 19:01:24,143 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 19:01:31,178 INFO L129 PetriNetUnfolder]: 2341/5686 cut-off events. [2021-12-06 19:01:31,178 INFO L130 PetriNetUnfolder]: For 301962/301962 co-relation queries the response was YES. [2021-12-06 19:01:31,283 INFO L84 FinitePrefix]: Finished finitePrefix Result has 73248 conditions, 5686 events. 2341/5686 cut-off events. For 301962/301962 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 49135 event pairs, 135 based on Foata normal form. 1/5635 useless extension candidates. Maximal degree in co-relation 72988. Up to 1177 conditions per place. [2021-12-06 19:01:31,337 INFO L132 encePairwiseOnDemand]: 66/87 looper letters, 1268 selfloop transitions, 1850 changer transitions 10/3167 dead transitions. [2021-12-06 19:01:31,337 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1059 places, 3167 transitions, 103657 flow [2021-12-06 19:01:31,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-12-06 19:01:31,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2021-12-06 19:01:31,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 2874 transitions. [2021-12-06 19:01:31,340 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.611749680715198 [2021-12-06 19:01:31,340 INFO L72 ComplementDD]: Start complementDD. Operand 54 states and 2874 transitions. [2021-12-06 19:01:31,340 INFO L73 IsDeterministic]: Start isDeterministic. Operand 54 states and 2874 transitions. [2021-12-06 19:01:31,340 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 19:01:31,340 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 54 states and 2874 transitions. [2021-12-06 19:01:31,342 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 55 states, 54 states have (on average 53.22222222222222) internal successors, (2874), 54 states have internal predecessors, (2874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:01:31,344 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 55 states, 55 states have (on average 87.0) internal successors, (4785), 55 states have internal predecessors, (4785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:01:31,344 INFO L81 ComplementDD]: Finished complementDD. Result has 55 states, 55 states have (on average 87.0) internal successors, (4785), 55 states have internal predecessors, (4785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:01:31,344 INFO L186 Difference]: Start difference. First operand has 1013 places, 2949 transitions, 91479 flow. Second operand 54 states and 2874 transitions. [2021-12-06 19:01:31,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1059 places, 3167 transitions, 103657 flow [2021-12-06 19:01:35,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1033 places, 3167 transitions, 99838 flow, removed 54 selfloop flow, removed 26 redundant places. [2021-12-06 19:01:35,657 INFO L242 Difference]: Finished difference. Result has 1046 places, 3071 transitions, 96577 flow [2021-12-06 19:01:35,660 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=87938, PETRI_DIFFERENCE_MINUEND_PLACES=980, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2949, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1729, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=54, PETRI_FLOW=96577, PETRI_PLACES=1046, PETRI_TRANSITIONS=3071} [2021-12-06 19:01:35,660 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 969 predicate places. [2021-12-06 19:01:35,660 INFO L470 AbstractCegarLoop]: Abstraction has has 1046 places, 3071 transitions, 96577 flow [2021-12-06 19:01:35,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 50.794117647058826) internal successors, (1727), 34 states have internal predecessors, (1727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:01:35,660 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 19:01:35,661 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:01:35,680 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-12-06 19:01:35,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-12-06 19:01:35,861 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 19:01:35,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:01:35,863 INFO L85 PathProgramCache]: Analyzing trace with hash 848000147, now seen corresponding path program 20 times [2021-12-06 19:01:35,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:01:35,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139678116] [2021-12-06 19:01:35,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:01:35,864 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:01:35,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:01:35,995 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:01:35,996 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:01:35,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139678116] [2021-12-06 19:01:35,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139678116] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:01:35,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455313690] [2021-12-06 19:01:35,996 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 19:01:35,996 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:01:35,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:01:35,997 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:01:35,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-12-06 19:01:36,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 19:01:36,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:01:36,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-06 19:01:36,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:01:36,234 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:01:36,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:01:36,582 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:01:36,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455313690] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:01:36,582 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:01:36,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 32 [2021-12-06 19:01:36,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711185343] [2021-12-06 19:01:36,582 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:01:36,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-06 19:01:36,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:01:36,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-06 19:01:36,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=854, Unknown=0, NotChecked=0, Total=992 [2021-12-06 19:01:36,584 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2021-12-06 19:01:36,585 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1046 places, 3071 transitions, 96577 flow. Second operand has 32 states, 32 states have (on average 50.71875) internal successors, (1623), 32 states have internal predecessors, (1623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:01:36,585 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 19:01:36,585 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2021-12-06 19:01:36,585 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 19:01:51,155 INFO L129 PetriNetUnfolder]: 3721/8660 cut-off events. [2021-12-06 19:01:51,156 INFO L130 PetriNetUnfolder]: For 488639/488639 co-relation queries the response was YES. [2021-12-06 19:01:51,330 INFO L84 FinitePrefix]: Finished finitePrefix Result has 115292 conditions, 8660 events. 3721/8660 cut-off events. For 488639/488639 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 78598 event pairs, 119 based on Foata normal form. 4/8615 useless extension candidates. Maximal degree in co-relation 115027. Up to 1311 conditions per place. [2021-12-06 19:01:51,413 INFO L132 encePairwiseOnDemand]: 64/87 looper letters, 1222 selfloop transitions, 4028 changer transitions 26/5315 dead transitions. [2021-12-06 19:01:51,413 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1176 places, 5315 transitions, 173913 flow [2021-12-06 19:01:51,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2021-12-06 19:01:51,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2021-12-06 19:01:51,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 7210 transitions. [2021-12-06 19:01:51,417 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6093644354293442 [2021-12-06 19:01:51,417 INFO L72 ComplementDD]: Start complementDD. Operand 136 states and 7210 transitions. [2021-12-06 19:01:51,418 INFO L73 IsDeterministic]: Start isDeterministic. Operand 136 states and 7210 transitions. [2021-12-06 19:01:51,419 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 19:01:51,419 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 136 states and 7210 transitions. [2021-12-06 19:01:51,424 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 137 states, 136 states have (on average 53.01470588235294) internal successors, (7210), 136 states have internal predecessors, (7210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:01:51,429 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 137 states, 137 states have (on average 87.0) internal successors, (11919), 137 states have internal predecessors, (11919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:01:51,430 INFO L81 ComplementDD]: Finished complementDD. Result has 137 states, 137 states have (on average 87.0) internal successors, (11919), 137 states have internal predecessors, (11919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:01:51,430 INFO L186 Difference]: Start difference. First operand has 1046 places, 3071 transitions, 96577 flow. Second operand 136 states and 7210 transitions. [2021-12-06 19:01:51,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1176 places, 5315 transitions, 173913 flow [2021-12-06 19:02:01,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1163 places, 5315 transitions, 173506 flow, removed 39 selfloop flow, removed 13 redundant places. [2021-12-06 19:02:01,733 INFO L242 Difference]: Finished difference. Result has 1218 places, 5017 transitions, 170769 flow [2021-12-06 19:02:01,735 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=96282, PETRI_DIFFERENCE_MINUEND_PLACES=1028, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3071, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2230, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=636, PETRI_DIFFERENCE_SUBTRAHEND_STATES=136, PETRI_FLOW=170769, PETRI_PLACES=1218, PETRI_TRANSITIONS=5017} [2021-12-06 19:02:01,735 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 1141 predicate places. [2021-12-06 19:02:01,735 INFO L470 AbstractCegarLoop]: Abstraction has has 1218 places, 5017 transitions, 170769 flow [2021-12-06 19:02:01,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 50.71875) internal successors, (1623), 32 states have internal predecessors, (1623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:02:01,736 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 19:02:01,736 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:02:01,754 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-12-06 19:02:01,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:02:01,937 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 19:02:01,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:02:01,938 INFO L85 PathProgramCache]: Analyzing trace with hash -628321255, now seen corresponding path program 21 times [2021-12-06 19:02:01,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:02:01,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845662309] [2021-12-06 19:02:01,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:02:01,939 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:02:01,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:02:02,056 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:02:02,056 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:02:02,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845662309] [2021-12-06 19:02:02,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845662309] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:02:02,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572720758] [2021-12-06 19:02:02,057 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 19:02:02,057 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:02:02,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:02:02,057 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:02:02,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-12-06 19:02:02,102 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-06 19:02:02,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:02:02,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-06 19:02:02,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:02:02,280 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:02:02,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:02:02,649 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:02:02,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572720758] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:02:02,649 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:02:02,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 31 [2021-12-06 19:02:02,649 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042237762] [2021-12-06 19:02:02,650 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:02:02,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-06 19:02:02,650 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:02:02,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-06 19:02:02,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=797, Unknown=0, NotChecked=0, Total=930 [2021-12-06 19:02:02,652 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2021-12-06 19:02:02,653 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1218 places, 5017 transitions, 170769 flow. Second operand has 31 states, 31 states have (on average 50.774193548387096) internal successors, (1574), 31 states have internal predecessors, (1574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:02:02,653 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 19:02:02,653 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2021-12-06 19:02:02,653 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 19:02:34,018 INFO L129 PetriNetUnfolder]: 5494/12308 cut-off events. [2021-12-06 19:02:34,018 INFO L130 PetriNetUnfolder]: For 825463/825468 co-relation queries the response was YES. [2021-12-06 19:02:34,290 INFO L84 FinitePrefix]: Finished finitePrefix Result has 181703 conditions, 12308 events. 5494/12308 cut-off events. For 825463/825468 co-relation queries the response was YES. Maximal size of possible extension queue 625. Compared 114939 event pairs, 100 based on Foata normal form. 7/12262 useless extension candidates. Maximal degree in co-relation 181386. Up to 1854 conditions per place. [2021-12-06 19:02:34,425 INFO L132 encePairwiseOnDemand]: 64/87 looper letters, 1236 selfloop transitions, 6587 changer transitions 40/7902 dead transitions. [2021-12-06 19:02:34,425 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1372 places, 7902 transitions, 281958 flow [2021-12-06 19:02:34,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 158 states. [2021-12-06 19:02:34,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2021-12-06 19:02:34,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 8358 transitions. [2021-12-06 19:02:34,430 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6080314273243125 [2021-12-06 19:02:34,430 INFO L72 ComplementDD]: Start complementDD. Operand 158 states and 8358 transitions. [2021-12-06 19:02:34,430 INFO L73 IsDeterministic]: Start isDeterministic. Operand 158 states and 8358 transitions. [2021-12-06 19:02:34,432 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 19:02:34,432 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 158 states and 8358 transitions. [2021-12-06 19:02:34,437 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 159 states, 158 states have (on average 52.89873417721519) internal successors, (8358), 158 states have internal predecessors, (8358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:02:34,443 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 159 states, 159 states have (on average 87.0) internal successors, (13833), 159 states have internal predecessors, (13833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:02:34,444 INFO L81 ComplementDD]: Finished complementDD. Result has 159 states, 159 states have (on average 87.0) internal successors, (13833), 159 states have internal predecessors, (13833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:02:34,444 INFO L186 Difference]: Start difference. First operand has 1218 places, 5017 transitions, 170769 flow. Second operand 158 states and 8358 transitions. [2021-12-06 19:02:34,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1372 places, 7902 transitions, 281958 flow [2021-12-06 19:03:01,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1361 places, 7902 transitions, 277764 flow, removed 1469 selfloop flow, removed 11 redundant places. [2021-12-06 19:03:02,147 INFO L242 Difference]: Finished difference. Result has 1417 places, 7530 transitions, 275855 flow [2021-12-06 19:03:02,150 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=168187, PETRI_DIFFERENCE_MINUEND_PLACES=1204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5017, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4178, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=575, PETRI_DIFFERENCE_SUBTRAHEND_STATES=158, PETRI_FLOW=275855, PETRI_PLACES=1417, PETRI_TRANSITIONS=7530} [2021-12-06 19:03:02,151 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 1340 predicate places. [2021-12-06 19:03:02,151 INFO L470 AbstractCegarLoop]: Abstraction has has 1417 places, 7530 transitions, 275855 flow [2021-12-06 19:03:02,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 50.774193548387096) internal successors, (1574), 31 states have internal predecessors, (1574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:03:02,151 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 19:03:02,151 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:03:02,170 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-12-06 19:03:02,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:03:02,352 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 19:03:02,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:03:02,352 INFO L85 PathProgramCache]: Analyzing trace with hash 2033786703, now seen corresponding path program 22 times [2021-12-06 19:03:02,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:03:02,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186410682] [2021-12-06 19:03:02,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:03:02,353 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:03:02,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:03:02,465 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:03:02,465 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:03:02,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186410682] [2021-12-06 19:03:02,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186410682] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:03:02,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174553064] [2021-12-06 19:03:02,466 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 19:03:02,466 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:03:02,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:03:02,467 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:03:02,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-12-06 19:03:02,511 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 19:03:02,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:03:02,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-06 19:03:02,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:03:02,720 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:03:02,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:03:03,004 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:03:03,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174553064] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:03:03,004 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:03:03,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 33 [2021-12-06 19:03:03,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551849912] [2021-12-06 19:03:03,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:03:03,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-06 19:03:03,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:03:03,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-06 19:03:03,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=925, Unknown=0, NotChecked=0, Total=1056 [2021-12-06 19:03:03,006 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2021-12-06 19:03:03,007 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1417 places, 7530 transitions, 275855 flow. Second operand has 33 states, 33 states have (on average 50.90909090909091) internal successors, (1680), 33 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:03:03,007 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 19:03:03,008 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2021-12-06 19:03:03,008 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 19:03:50,891 INFO L129 PetriNetUnfolder]: 6867/15112 cut-off events. [2021-12-06 19:03:50,891 INFO L130 PetriNetUnfolder]: For 1115850/1115860 co-relation queries the response was YES. [2021-12-06 19:03:51,320 INFO L84 FinitePrefix]: Finished finitePrefix Result has 237629 conditions, 15112 events. 6867/15112 cut-off events. For 1115850/1115860 co-relation queries the response was YES. Maximal size of possible extension queue 816. Compared 145327 event pairs, 287 based on Foata normal form. 9/15027 useless extension candidates. Maximal degree in co-relation 237261. Up to 4644 conditions per place. [2021-12-06 19:03:51,495 INFO L132 encePairwiseOnDemand]: 67/87 looper letters, 4235 selfloop transitions, 5501 changer transitions 61/9836 dead transitions. [2021-12-06 19:03:51,495 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1489 places, 9836 transitions, 375416 flow [2021-12-06 19:03:51,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-12-06 19:03:51,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2021-12-06 19:03:51,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 4143 transitions. [2021-12-06 19:03:51,498 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6184505150022391 [2021-12-06 19:03:51,499 INFO L72 ComplementDD]: Start complementDD. Operand 77 states and 4143 transitions. [2021-12-06 19:03:51,499 INFO L73 IsDeterministic]: Start isDeterministic. Operand 77 states and 4143 transitions. [2021-12-06 19:03:51,499 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 19:03:51,499 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 77 states and 4143 transitions. [2021-12-06 19:03:51,502 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 78 states, 77 states have (on average 53.8051948051948) internal successors, (4143), 77 states have internal predecessors, (4143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:03:51,504 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 78 states, 78 states have (on average 87.0) internal successors, (6786), 78 states have internal predecessors, (6786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:03:51,505 INFO L81 ComplementDD]: Finished complementDD. Result has 78 states, 78 states have (on average 87.0) internal successors, (6786), 78 states have internal predecessors, (6786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:03:51,505 INFO L186 Difference]: Start difference. First operand has 1417 places, 7530 transitions, 275855 flow. Second operand 77 states and 4143 transitions. [2021-12-06 19:03:51,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1489 places, 9836 transitions, 375416 flow [2021-12-06 19:04:38,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1461 places, 9836 transitions, 371068 flow, removed 897 selfloop flow, removed 28 redundant places. [2021-12-06 19:04:39,056 INFO L242 Difference]: Finished difference. Result has 1513 places, 9228 transitions, 356494 flow [2021-12-06 19:04:39,062 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=272550, PETRI_DIFFERENCE_MINUEND_PLACES=1385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=7530, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3910, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=3069, PETRI_DIFFERENCE_SUBTRAHEND_STATES=77, PETRI_FLOW=356494, PETRI_PLACES=1513, PETRI_TRANSITIONS=9228} [2021-12-06 19:04:39,062 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 1436 predicate places. [2021-12-06 19:04:39,062 INFO L470 AbstractCegarLoop]: Abstraction has has 1513 places, 9228 transitions, 356494 flow [2021-12-06 19:04:39,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 50.90909090909091) internal successors, (1680), 33 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:04:39,062 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 19:04:39,062 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:04:39,082 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-12-06 19:04:39,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-12-06 19:04:39,263 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 19:04:39,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:04:39,263 INFO L85 PathProgramCache]: Analyzing trace with hash -1550651895, now seen corresponding path program 23 times [2021-12-06 19:04:39,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:04:39,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95347090] [2021-12-06 19:04:39,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:04:39,264 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:04:39,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:04:39,363 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:04:39,363 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:04:39,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95347090] [2021-12-06 19:04:39,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95347090] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:04:39,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813337545] [2021-12-06 19:04:39,364 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 19:04:39,364 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:04:39,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:04:39,365 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:04:39,365 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-12-06 19:04:39,412 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 19:04:39,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:04:39,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-06 19:04:39,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:04:39,615 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:04:39,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:04:39,898 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:04:39,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813337545] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:04:39,898 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:04:39,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 33 [2021-12-06 19:04:39,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079259483] [2021-12-06 19:04:39,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:04:39,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-06 19:04:39,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:04:39,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-06 19:04:39,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=920, Unknown=0, NotChecked=0, Total=1056 [2021-12-06 19:04:39,900 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2021-12-06 19:04:39,901 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1513 places, 9228 transitions, 356494 flow. Second operand has 33 states, 33 states have (on average 50.72727272727273) internal successors, (1674), 33 states have internal predecessors, (1674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:04:39,901 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 19:04:39,901 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2021-12-06 19:04:39,901 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 19:05:59,602 INFO L129 PetriNetUnfolder]: 9029/19445 cut-off events. [2021-12-06 19:05:59,602 INFO L130 PetriNetUnfolder]: For 1594304/1594316 co-relation queries the response was YES. [2021-12-06 19:06:00,461 INFO L84 FinitePrefix]: Finished finitePrefix Result has 326292 conditions, 19445 events. 9029/19445 cut-off events. For 1594304/1594316 co-relation queries the response was YES. Maximal size of possible extension queue 1058. Compared 190838 event pairs, 172 based on Foata normal form. 7/19383 useless extension candidates. Maximal degree in co-relation 325887. Up to 3459 conditions per place. [2021-12-06 19:06:00,708 INFO L132 encePairwiseOnDemand]: 67/87 looper letters, 2665 selfloop transitions, 10226 changer transitions 31/12961 dead transitions. [2021-12-06 19:06:00,708 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1572 places, 12961 transitions, 521373 flow [2021-12-06 19:06:00,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-12-06 19:06:00,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2021-12-06 19:06:00,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 3365 transitions. [2021-12-06 19:06:00,711 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6139390622149243 [2021-12-06 19:06:00,711 INFO L72 ComplementDD]: Start complementDD. Operand 63 states and 3365 transitions. [2021-12-06 19:06:00,711 INFO L73 IsDeterministic]: Start isDeterministic. Operand 63 states and 3365 transitions. [2021-12-06 19:06:00,711 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 19:06:00,711 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 63 states and 3365 transitions. [2021-12-06 19:06:00,714 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 64 states, 63 states have (on average 53.41269841269841) internal successors, (3365), 63 states have internal predecessors, (3365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:06:00,716 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 64 states, 64 states have (on average 87.0) internal successors, (5568), 64 states have internal predecessors, (5568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:06:00,716 INFO L81 ComplementDD]: Finished complementDD. Result has 64 states, 64 states have (on average 87.0) internal successors, (5568), 64 states have internal predecessors, (5568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:06:00,716 INFO L186 Difference]: Start difference. First operand has 1513 places, 9228 transitions, 356494 flow. Second operand 63 states and 3365 transitions. [2021-12-06 19:06:00,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1572 places, 12961 transitions, 521373 flow [2021-12-06 19:07:38,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1561 places, 12961 transitions, 518488 flow, removed 771 selfloop flow, removed 11 redundant places. [2021-12-06 19:07:38,759 INFO L242 Difference]: Finished difference. Result has 1591 places, 12469 transitions, 511814 flow [2021-12-06 19:07:38,766 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=354687, PETRI_DIFFERENCE_MINUEND_PLACES=1499, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=9228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7028, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1545, PETRI_DIFFERENCE_SUBTRAHEND_STATES=63, PETRI_FLOW=511814, PETRI_PLACES=1591, PETRI_TRANSITIONS=12469} [2021-12-06 19:07:38,767 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 1514 predicate places. [2021-12-06 19:07:38,767 INFO L470 AbstractCegarLoop]: Abstraction has has 1591 places, 12469 transitions, 511814 flow [2021-12-06 19:07:38,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 50.72727272727273) internal successors, (1674), 33 states have internal predecessors, (1674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:07:38,767 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 19:07:38,767 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:07:38,788 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2021-12-06 19:07:38,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-12-06 19:07:38,968 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 19:07:38,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:07:38,969 INFO L85 PathProgramCache]: Analyzing trace with hash 51330179, now seen corresponding path program 24 times [2021-12-06 19:07:38,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:07:38,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097529982] [2021-12-06 19:07:38,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:07:38,970 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:07:38,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:07:39,098 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:07:39,099 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:07:39,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097529982] [2021-12-06 19:07:39,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097529982] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:07:39,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168160469] [2021-12-06 19:07:39,099 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 19:07:39,099 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:07:39,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:07:39,100 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:07:39,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-12-06 19:07:39,143 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-12-06 19:07:39,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:07:39,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-06 19:07:39,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:07:39,342 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:07:39,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:07:39,720 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:07:39,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168160469] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:07:39,720 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:07:39,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 33 [2021-12-06 19:07:39,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310873407] [2021-12-06 19:07:39,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:07:39,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-06 19:07:39,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:07:39,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-06 19:07:39,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=913, Unknown=0, NotChecked=0, Total=1056 [2021-12-06 19:07:39,722 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2021-12-06 19:07:39,723 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1591 places, 12469 transitions, 511814 flow. Second operand has 33 states, 33 states have (on average 50.78787878787879) internal successors, (1676), 33 states have internal predecessors, (1676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:07:39,723 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 19:07:39,723 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2021-12-06 19:07:39,723 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 19:09:45,169 INFO L129 PetriNetUnfolder]: 9929/21495 cut-off events. [2021-12-06 19:09:45,169 INFO L130 PetriNetUnfolder]: For 1925791/1925803 co-relation queries the response was YES. [2021-12-06 19:09:46,185 INFO L84 FinitePrefix]: Finished finitePrefix Result has 380667 conditions, 21495 events. 9929/21495 cut-off events. For 1925791/1925803 co-relation queries the response was YES. Maximal size of possible extension queue 1150. Compared 215642 event pairs, 254 based on Foata normal form. 7/21393 useless extension candidates. Maximal degree in co-relation 380236. Up to 5739 conditions per place. [2021-12-06 19:09:46,478 INFO L132 encePairwiseOnDemand]: 64/87 looper letters, 3735 selfloop transitions, 10272 changer transitions 49/14095 dead transitions. [2021-12-06 19:09:46,479 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1686 places, 14095 transitions, 602049 flow [2021-12-06 19:09:46,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-12-06 19:09:46,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2021-12-06 19:09:46,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 5272 transitions. [2021-12-06 19:09:46,482 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6120979914083362 [2021-12-06 19:09:46,482 INFO L72 ComplementDD]: Start complementDD. Operand 99 states and 5272 transitions. [2021-12-06 19:09:46,482 INFO L73 IsDeterministic]: Start isDeterministic. Operand 99 states and 5272 transitions. [2021-12-06 19:09:46,483 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 19:09:46,483 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 99 states and 5272 transitions. [2021-12-06 19:09:46,486 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 100 states, 99 states have (on average 53.25252525252525) internal successors, (5272), 99 states have internal predecessors, (5272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:09:46,489 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 100 states, 100 states have (on average 87.0) internal successors, (8700), 100 states have internal predecessors, (8700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:09:46,490 INFO L81 ComplementDD]: Finished complementDD. Result has 100 states, 100 states have (on average 87.0) internal successors, (8700), 100 states have internal predecessors, (8700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:09:46,490 INFO L186 Difference]: Start difference. First operand has 1591 places, 12469 transitions, 511814 flow. Second operand 99 states and 5272 transitions. [2021-12-06 19:09:46,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1686 places, 14095 transitions, 602049 flow [2021-12-06 19:11:43,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1672 places, 14095 transitions, 598904 flow, removed 658 selfloop flow, removed 14 redundant places. [2021-12-06 19:11:44,541 INFO L242 Difference]: Finished difference. Result has 1722 places, 13762 transitions, 599165 flow [2021-12-06 19:11:44,546 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=509307, PETRI_DIFFERENCE_MINUEND_PLACES=1574, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=12469, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9040, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=3148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=99, PETRI_FLOW=599165, PETRI_PLACES=1722, PETRI_TRANSITIONS=13762} [2021-12-06 19:11:44,547 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 1645 predicate places. [2021-12-06 19:11:44,547 INFO L470 AbstractCegarLoop]: Abstraction has has 1722 places, 13762 transitions, 599165 flow [2021-12-06 19:11:44,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 50.78787878787879) internal successors, (1676), 33 states have internal predecessors, (1676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:11:44,547 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 19:11:44,547 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:11:44,566 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-12-06 19:11:44,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-12-06 19:11:44,748 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 19:11:44,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:11:44,749 INFO L85 PathProgramCache]: Analyzing trace with hash 271494623, now seen corresponding path program 25 times [2021-12-06 19:11:44,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:11:44,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993766314] [2021-12-06 19:11:44,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:11:44,750 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:11:44,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:44,874 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:11:44,874 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:11:44,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993766314] [2021-12-06 19:11:44,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993766314] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:11:44,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206822052] [2021-12-06 19:11:44,874 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 19:11:44,874 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:11:44,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:11:44,875 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:11:44,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e306794e-1076-44b4-8d49-0b5cd34985b1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-12-06 19:11:44,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:44,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-06 19:11:44,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:11:45,102 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:11:45,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:11:45,422 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:11:45,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206822052] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:11:45,422 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:11:45,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 33 [2021-12-06 19:11:45,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46430345] [2021-12-06 19:11:45,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:11:45,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-06 19:11:45,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:11:45,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-06 19:11:45,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=910, Unknown=0, NotChecked=0, Total=1056 [2021-12-06 19:11:45,424 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2021-12-06 19:11:45,425 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1722 places, 13762 transitions, 599165 flow. Second operand has 33 states, 33 states have (on average 50.666666666666664) internal successors, (1672), 33 states have internal predecessors, (1672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:11:45,425 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 19:11:45,425 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2021-12-06 19:11:45,425 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand