./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem14_label25.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 57096758 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef8638f-698e-499c-a4ac-014bbc8c58e4/bin/uautomizer-hJ6jxDFKc3/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef8638f-698e-499c-a4ac-014bbc8c58e4/bin/uautomizer-hJ6jxDFKc3/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef8638f-698e-499c-a4ac-014bbc8c58e4/bin/uautomizer-hJ6jxDFKc3/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef8638f-698e-499c-a4ac-014bbc8c58e4/bin/uautomizer-hJ6jxDFKc3/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem14_label25.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef8638f-698e-499c-a4ac-014bbc8c58e4/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef8638f-698e-499c-a4ac-014bbc8c58e4/bin/uautomizer-hJ6jxDFKc3 --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 9c9e504dbddc7dcee5c37c545c0593dfdbc10dce ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-5709675 [2021-10-15 20:14:17,845 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-15 20:14:17,847 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-15 20:14:17,889 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-15 20:14:17,890 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-15 20:14:17,892 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-15 20:14:17,894 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-15 20:14:17,897 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-15 20:14:17,900 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-15 20:14:17,902 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-15 20:14:17,903 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-15 20:14:17,905 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-15 20:14:17,906 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-15 20:14:17,907 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-15 20:14:17,909 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-15 20:14:17,911 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-15 20:14:17,912 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-15 20:14:17,914 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-15 20:14:17,917 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-15 20:14:17,920 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-15 20:14:17,923 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-15 20:14:17,925 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-15 20:14:17,927 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-15 20:14:17,928 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-15 20:14:17,933 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-15 20:14:17,934 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-15 20:14:17,935 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-15 20:14:17,936 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-15 20:14:17,937 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-15 20:14:17,939 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-15 20:14:17,939 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-15 20:14:17,940 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-15 20:14:17,942 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-15 20:14:17,943 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-15 20:14:17,945 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-15 20:14:17,945 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-15 20:14:17,946 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-15 20:14:17,947 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-15 20:14:17,948 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-15 20:14:17,949 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-15 20:14:17,950 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-15 20:14:17,952 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef8638f-698e-499c-a4ac-014bbc8c58e4/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-15 20:14:17,985 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-15 20:14:17,986 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-15 20:14:17,986 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-15 20:14:17,987 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-15 20:14:17,989 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-15 20:14:17,989 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-15 20:14:17,990 INFO L138 SettingsManager]: * Use SBE=true [2021-10-15 20:14:17,990 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-15 20:14:17,990 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-15 20:14:17,991 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-15 20:14:17,991 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-15 20:14:17,991 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-15 20:14:17,991 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-15 20:14:17,992 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-15 20:14:17,992 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-15 20:14:17,992 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-15 20:14:17,993 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-15 20:14:17,993 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-15 20:14:17,993 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-15 20:14:17,993 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-15 20:14:17,994 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-15 20:14:17,994 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-15 20:14:17,994 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 20:14:17,995 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-15 20:14:17,995 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-15 20:14:17,995 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-15 20:14:17,996 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-15 20:14:17,996 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-15 20:14:17,996 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-15 20:14:17,996 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-15 20:14:17,997 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-15 20:14:17,997 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-15 20:14:17,997 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_8ef8638f-698e-499c-a4ac-014bbc8c58e4/bin/uautomizer-hJ6jxDFKc3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef8638f-698e-499c-a4ac-014bbc8c58e4/bin/uautomizer-hJ6jxDFKc3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9c9e504dbddc7dcee5c37c545c0593dfdbc10dce [2021-10-15 20:14:18,303 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-15 20:14:18,330 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-15 20:14:18,333 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-15 20:14:18,335 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-15 20:14:18,336 INFO L275 PluginConnector]: CDTParser initialized [2021-10-15 20:14:18,337 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef8638f-698e-499c-a4ac-014bbc8c58e4/bin/uautomizer-hJ6jxDFKc3/../../sv-benchmarks/c/eca-rers2012/Problem14_label25.c [2021-10-15 20:14:18,441 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef8638f-698e-499c-a4ac-014bbc8c58e4/bin/uautomizer-hJ6jxDFKc3/data/f69d39a85/613a9072fdc546bf90683164f066a16a/FLAG82019362f [2021-10-15 20:14:19,193 INFO L306 CDTParser]: Found 1 translation units. [2021-10-15 20:14:19,194 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef8638f-698e-499c-a4ac-014bbc8c58e4/sv-benchmarks/c/eca-rers2012/Problem14_label25.c [2021-10-15 20:14:19,221 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef8638f-698e-499c-a4ac-014bbc8c58e4/bin/uautomizer-hJ6jxDFKc3/data/f69d39a85/613a9072fdc546bf90683164f066a16a/FLAG82019362f [2021-10-15 20:14:19,339 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef8638f-698e-499c-a4ac-014bbc8c58e4/bin/uautomizer-hJ6jxDFKc3/data/f69d39a85/613a9072fdc546bf90683164f066a16a [2021-10-15 20:14:19,345 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-15 20:14:19,348 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-15 20:14:19,352 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-15 20:14:19,352 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-15 20:14:19,357 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-15 20:14:19,358 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 08:14:19" (1/1) ... [2021-10-15 20:14:19,363 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@669abc27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:14:19, skipping insertion in model container [2021-10-15 20:14:19,363 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 08:14:19" (1/1) ... [2021-10-15 20:14:19,372 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-15 20:14:19,441 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-15 20:14:19,745 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef8638f-698e-499c-a4ac-014bbc8c58e4/sv-benchmarks/c/eca-rers2012/Problem14_label25.c[6534,6547] [2021-10-15 20:14:20,031 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 20:14:20,043 INFO L203 MainTranslator]: Completed pre-run [2021-10-15 20:14:20,093 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef8638f-698e-499c-a4ac-014bbc8c58e4/sv-benchmarks/c/eca-rers2012/Problem14_label25.c[6534,6547] [2021-10-15 20:14:20,225 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 20:14:20,243 INFO L208 MainTranslator]: Completed translation [2021-10-15 20:14:20,243 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:14:20 WrapperNode [2021-10-15 20:14:20,244 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-15 20:14:20,245 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-15 20:14:20,245 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-15 20:14:20,246 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-15 20:14:20,255 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:14:20" (1/1) ... [2021-10-15 20:14:20,284 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:14:20" (1/1) ... [2021-10-15 20:14:20,405 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-15 20:14:20,406 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-15 20:14:20,406 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-15 20:14:20,406 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-15 20:14:20,417 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:14:20" (1/1) ... [2021-10-15 20:14:20,417 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:14:20" (1/1) ... [2021-10-15 20:14:20,432 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:14:20" (1/1) ... [2021-10-15 20:14:20,432 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:14:20" (1/1) ... [2021-10-15 20:14:20,483 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:14:20" (1/1) ... [2021-10-15 20:14:20,522 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:14:20" (1/1) ... [2021-10-15 20:14:20,529 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:14:20" (1/1) ... [2021-10-15 20:14:20,548 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-15 20:14:20,551 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-15 20:14:20,552 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-15 20:14:20,552 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-15 20:14:20,554 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:14:20" (1/1) ... [2021-10-15 20:14:20,564 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 20:14:20,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef8638f-698e-499c-a4ac-014bbc8c58e4/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:14:20,601 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef8638f-698e-499c-a4ac-014bbc8c58e4/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-15 20:14:20,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef8638f-698e-499c-a4ac-014bbc8c58e4/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-15 20:14:20,664 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-15 20:14:20,664 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-15 20:14:20,664 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-15 20:14:20,665 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-15 20:14:22,407 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-15 20:14:22,407 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-15 20:14:22,411 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 08:14:22 BoogieIcfgContainer [2021-10-15 20:14:22,412 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-15 20:14:22,417 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-15 20:14:22,417 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-15 20:14:22,423 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-15 20:14:22,423 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 08:14:19" (1/3) ... [2021-10-15 20:14:22,425 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d56d7db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 08:14:22, skipping insertion in model container [2021-10-15 20:14:22,425 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:14:20" (2/3) ... [2021-10-15 20:14:22,425 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d56d7db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 08:14:22, skipping insertion in model container [2021-10-15 20:14:22,426 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 08:14:22" (3/3) ... [2021-10-15 20:14:22,428 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem14_label25.c [2021-10-15 20:14:22,440 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-15 20:14:22,440 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-15 20:14:22,500 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-15 20:14:22,509 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, mConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-15 20:14:22,509 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-15 20:14:22,538 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 245 places, 422 transitions, 844 flow [2021-10-15 20:14:22,702 INFO L129 PetriNetUnfolder]: 178/422 cut-off events. [2021-10-15 20:14:22,704 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 20:14:22,707 INFO L84 FinitePrefix]: Finished finitePrefix Result has 423 conditions, 422 events. 178/422 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 249 event pairs, 0 based on Foata normal form. 0/243 useless extension candidates. Maximal degree in co-relation 0. Up to 115 conditions per place. [2021-10-15 20:14:22,708 INFO L82 GeneralOperation]: Start removeDead. Operand has 245 places, 422 transitions, 844 flow [2021-10-15 20:14:22,725 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 242 places, 417 transitions, 834 flow [2021-10-15 20:14:22,750 INFO L129 PetriNetUnfolder]: 60/184 cut-off events. [2021-10-15 20:14:22,751 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 20:14:22,751 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:14:22,752 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] [2021-10-15 20:14:22,753 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:14:22,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:14:22,760 INFO L82 PathProgramCache]: Analyzing trace with hash -107486446, now seen corresponding path program 1 times [2021-10-15 20:14:22,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:14:22,772 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538259544] [2021-10-15 20:14:22,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:14:22,773 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:14:22,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:14:23,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:14:23,263 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:14:23,263 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538259544] [2021-10-15 20:14:23,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538259544] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:14:23,264 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:14:23,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 20:14:23,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99028223] [2021-10-15 20:14:23,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 20:14:23,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:14:23,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 20:14:23,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 20:14:23,306 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 422 [2021-10-15 20:14:23,311 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 417 transitions, 834 flow. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:14:23,312 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:14:23,312 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 422 [2021-10-15 20:14:23,314 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:14:25,675 INFO L129 PetriNetUnfolder]: 282/881 cut-off events. [2021-10-15 20:14:25,675 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 20:14:25,677 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1753 conditions, 881 events. 282/881 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1068 event pairs, 0 based on Foata normal form. 63/600 useless extension candidates. Maximal degree in co-relation 1. Up to 483 conditions per place. [2021-10-15 20:14:25,687 INFO L132 encePairwiseOnDemand]: 185/422 looper letters, 640 selfloop transitions, 127 changer transitions 103/875 dead transitions. [2021-10-15 20:14:25,687 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 875 transitions, 3490 flow [2021-10-15 20:14:25,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 20:14:25,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 20:14:25,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1146 transitions. [2021-10-15 20:14:25,722 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6789099526066351 [2021-10-15 20:14:25,723 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1146 transitions. [2021-10-15 20:14:25,724 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1146 transitions. [2021-10-15 20:14:25,731 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:14:25,734 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1146 transitions. [2021-10-15 20:14:25,744 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 286.5) internal successors, (1146), 4 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:14:25,761 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 422.0) internal successors, (2110), 5 states have internal predecessors, (2110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:14:25,764 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 422.0) internal successors, (2110), 5 states have internal predecessors, (2110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:14:25,767 INFO L186 Difference]: Start difference. First operand has 242 places, 417 transitions, 834 flow. Second operand 4 states and 1146 transitions. [2021-10-15 20:14:25,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 875 transitions, 3490 flow [2021-10-15 20:14:25,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 875 transitions, 3490 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 20:14:25,814 INFO L242 Difference]: Finished difference. Result has 248 places, 422 transitions, 1788 flow [2021-10-15 20:14:25,817 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=712, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1788, PETRI_PLACES=248, PETRI_TRANSITIONS=422} [2021-10-15 20:14:25,818 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, 6 predicate places. [2021-10-15 20:14:25,819 INFO L470 AbstractCegarLoop]: Abstraction has has 248 places, 422 transitions, 1788 flow [2021-10-15 20:14:25,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:14:25,820 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:14:25,821 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:14:25,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-15 20:14:25,822 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:14:25,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:14:25,824 INFO L82 PathProgramCache]: Analyzing trace with hash 228116006, now seen corresponding path program 1 times [2021-10-15 20:14:25,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:14:25,824 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003270578] [2021-10-15 20:14:25,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:14:25,825 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:14:25,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:14:26,073 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 126 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-10-15 20:14:26,073 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:14:26,074 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003270578] [2021-10-15 20:14:26,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003270578] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:14:26,074 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:14:26,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-15 20:14:26,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832818846] [2021-10-15 20:14:26,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:14:26,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:14:26,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:14:26,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 20:14:26,081 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 422 [2021-10-15 20:14:26,082 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 422 transitions, 1788 flow. Second operand has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:14:26,082 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:14:26,082 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 422 [2021-10-15 20:14:26,082 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:14:27,349 INFO L129 PetriNetUnfolder]: 253/968 cut-off events. [2021-10-15 20:14:27,349 INFO L130 PetriNetUnfolder]: For 331/331 co-relation queries the response was YES. [2021-10-15 20:14:27,351 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2417 conditions, 968 events. 253/968 cut-off events. For 331/331 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1139 event pairs, 0 based on Foata normal form. 102/1070 useless extension candidates. Maximal degree in co-relation 1322. Up to 759 conditions per place. [2021-10-15 20:14:27,361 INFO L132 encePairwiseOnDemand]: 307/422 looper letters, 497 selfloop transitions, 107 changer transitions 0/609 dead transitions. [2021-10-15 20:14:27,361 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 609 transitions, 3406 flow [2021-10-15 20:14:27,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:14:27,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:14:27,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 604 transitions. [2021-10-15 20:14:27,366 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.47709320695102686 [2021-10-15 20:14:27,367 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 604 transitions. [2021-10-15 20:14:27,367 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 604 transitions. [2021-10-15 20:14:27,368 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:14:27,368 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 604 transitions. [2021-10-15 20:14:27,371 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 201.33333333333334) internal successors, (604), 3 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:14:27,377 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:14:27,379 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:14:27,379 INFO L186 Difference]: Start difference. First operand has 248 places, 422 transitions, 1788 flow. Second operand 3 states and 604 transitions. [2021-10-15 20:14:27,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 609 transitions, 3406 flow [2021-10-15 20:14:27,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 609 transitions, 3406 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 20:14:27,429 INFO L242 Difference]: Finished difference. Result has 192 places, 434 transitions, 2430 flow [2021-10-15 20:14:27,430 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=1464, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2430, PETRI_PLACES=192, PETRI_TRANSITIONS=434} [2021-10-15 20:14:27,431 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, -50 predicate places. [2021-10-15 20:14:27,431 INFO L470 AbstractCegarLoop]: Abstraction has has 192 places, 434 transitions, 2430 flow [2021-10-15 20:14:27,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:14:27,432 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:14:27,432 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:14:27,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-15 20:14:27,433 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:14:27,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:14:27,434 INFO L82 PathProgramCache]: Analyzing trace with hash -1127504167, now seen corresponding path program 1 times [2021-10-15 20:14:27,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:14:27,435 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824116895] [2021-10-15 20:14:27,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:14:27,436 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:14:27,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:14:27,653 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 168 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-10-15 20:14:27,653 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:14:27,654 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824116895] [2021-10-15 20:14:27,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824116895] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:14:27,656 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:14:27,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 20:14:27,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71787244] [2021-10-15 20:14:27,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 20:14:27,659 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:14:27,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 20:14:27,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-15 20:14:27,663 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 422 [2021-10-15 20:14:27,664 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 434 transitions, 2430 flow. Second operand has 4 states, 4 states have (on average 53.25) internal successors, (213), 4 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:14:27,664 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:14:27,664 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 422 [2021-10-15 20:14:27,665 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:14:29,130 INFO L129 PetriNetUnfolder]: 270/1192 cut-off events. [2021-10-15 20:14:29,130 INFO L130 PetriNetUnfolder]: For 1085/1085 co-relation queries the response was YES. [2021-10-15 20:14:29,132 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3200 conditions, 1192 events. 270/1192 cut-off events. For 1085/1085 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1272 event pairs, 0 based on Foata normal form. 49/1241 useless extension candidates. Maximal degree in co-relation 2140. Up to 674 conditions per place. [2021-10-15 20:14:29,140 INFO L132 encePairwiseOnDemand]: 344/422 looper letters, 498 selfloop transitions, 7 changer transitions 142/652 dead transitions. [2021-10-15 20:14:29,141 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 652 transitions, 4256 flow [2021-10-15 20:14:29,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 20:14:29,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 20:14:29,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 590 transitions. [2021-10-15 20:14:29,146 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3495260663507109 [2021-10-15 20:14:29,146 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 590 transitions. [2021-10-15 20:14:29,146 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 590 transitions. [2021-10-15 20:14:29,147 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:14:29,147 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 590 transitions. [2021-10-15 20:14:29,150 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 147.5) internal successors, (590), 4 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:14:29,155 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 422.0) internal successors, (2110), 5 states have internal predecessors, (2110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:14:29,157 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 422.0) internal successors, (2110), 5 states have internal predecessors, (2110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:14:29,158 INFO L186 Difference]: Start difference. First operand has 192 places, 434 transitions, 2430 flow. Second operand 4 states and 590 transitions. [2021-10-15 20:14:29,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 652 transitions, 4256 flow [2021-10-15 20:14:29,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 652 transitions, 3852 flow, removed 95 selfloop flow, removed 2 redundant places. [2021-10-15 20:14:29,209 INFO L242 Difference]: Finished difference. Result has 195 places, 334 transitions, 1465 flow [2021-10-15 20:14:29,210 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=2026, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=434, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=427, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1465, PETRI_PLACES=195, PETRI_TRANSITIONS=334} [2021-10-15 20:14:29,210 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, -47 predicate places. [2021-10-15 20:14:29,211 INFO L470 AbstractCegarLoop]: Abstraction has has 195 places, 334 transitions, 1465 flow [2021-10-15 20:14:29,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 53.25) internal successors, (213), 4 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:14:29,211 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:14:29,212 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:14:29,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-15 20:14:29,213 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:14:29,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:14:29,214 INFO L82 PathProgramCache]: Analyzing trace with hash -1919360194, now seen corresponding path program 1 times [2021-10-15 20:14:29,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:14:29,215 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993307459] [2021-10-15 20:14:29,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:14:29,216 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:14:29,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:14:29,623 INFO L134 CoverageAnalysis]: Checked inductivity of 446 backedges. 342 proven. 0 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2021-10-15 20:14:29,623 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:14:29,624 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993307459] [2021-10-15 20:14:29,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993307459] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:14:29,624 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:14:29,625 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 20:14:29,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524550987] [2021-10-15 20:14:29,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:14:29,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:14:29,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:14:29,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 20:14:29,637 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 422 [2021-10-15 20:14:29,637 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 334 transitions, 1465 flow. Second operand has 3 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:14:29,638 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:14:29,638 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 422 [2021-10-15 20:14:29,638 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:14:30,932 INFO L129 PetriNetUnfolder]: 193/1442 cut-off events. [2021-10-15 20:14:30,932 INFO L130 PetriNetUnfolder]: For 673/673 co-relation queries the response was YES. [2021-10-15 20:14:30,935 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3369 conditions, 1442 events. 193/1442 cut-off events. For 673/673 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2482 event pairs, 0 based on Foata normal form. 73/1515 useless extension candidates. Maximal degree in co-relation 2275. Up to 883 conditions per place. [2021-10-15 20:14:30,943 INFO L132 encePairwiseOnDemand]: 345/422 looper letters, 491 selfloop transitions, 52 changer transitions 0/548 dead transitions. [2021-10-15 20:14:30,944 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 548 transitions, 3170 flow [2021-10-15 20:14:30,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:14:30,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:14:30,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 526 transitions. [2021-10-15 20:14:30,948 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4154818325434439 [2021-10-15 20:14:30,948 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 526 transitions. [2021-10-15 20:14:30,948 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 526 transitions. [2021-10-15 20:14:30,949 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:14:30,950 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 526 transitions. [2021-10-15 20:14:30,952 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 175.33333333333334) internal successors, (526), 3 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:14:30,956 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:14:30,958 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:14:30,958 INFO L186 Difference]: Start difference. First operand has 195 places, 334 transitions, 1465 flow. Second operand 3 states and 526 transitions. [2021-10-15 20:14:30,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 548 transitions, 3170 flow [2021-10-15 20:14:30,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 548 transitions, 3154 flow, removed 4 selfloop flow, removed 2 redundant places. [2021-10-15 20:14:30,992 INFO L242 Difference]: Finished difference. Result has 195 places, 373 transitions, 2084 flow [2021-10-15 20:14:30,994 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=1452, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2084, PETRI_PLACES=195, PETRI_TRANSITIONS=373} [2021-10-15 20:14:30,994 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, -47 predicate places. [2021-10-15 20:14:30,994 INFO L470 AbstractCegarLoop]: Abstraction has has 195 places, 373 transitions, 2084 flow [2021-10-15 20:14:30,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:14:30,995 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:14:30,996 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:14:30,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-15 20:14:30,997 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:14:30,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:14:30,998 INFO L82 PathProgramCache]: Analyzing trace with hash -57836550, now seen corresponding path program 1 times [2021-10-15 20:14:30,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:14:30,998 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422513321] [2021-10-15 20:14:30,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:14:30,999 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:14:31,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:14:31,290 INFO L134 CoverageAnalysis]: Checked inductivity of 447 backedges. 385 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-10-15 20:14:31,291 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:14:31,292 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422513321] [2021-10-15 20:14:31,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422513321] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:14:31,297 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:14:31,297 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 20:14:31,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974371448] [2021-10-15 20:14:31,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 20:14:31,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:14:31,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 20:14:31,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-15 20:14:31,301 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 422 [2021-10-15 20:14:31,309 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 373 transitions, 2084 flow. Second operand has 4 states, 4 states have (on average 84.75) internal successors, (339), 4 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:14:31,309 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:14:31,310 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 422 [2021-10-15 20:14:31,310 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:14:33,444 INFO L129 PetriNetUnfolder]: 224/2007 cut-off events. [2021-10-15 20:14:33,444 INFO L130 PetriNetUnfolder]: For 1593/1593 co-relation queries the response was YES. [2021-10-15 20:14:33,448 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4824 conditions, 2007 events. 224/2007 cut-off events. For 1593/1593 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 4063 event pairs, 0 based on Foata normal form. 46/2053 useless extension candidates. Maximal degree in co-relation 3050. Up to 1067 conditions per place. [2021-10-15 20:14:33,461 INFO L132 encePairwiseOnDemand]: 383/422 looper letters, 723 selfloop transitions, 26 changer transitions 0/754 dead transitions. [2021-10-15 20:14:33,461 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 754 transitions, 4642 flow [2021-10-15 20:14:33,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 20:14:33,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 20:14:33,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 708 transitions. [2021-10-15 20:14:33,467 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4194312796208531 [2021-10-15 20:14:33,467 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 708 transitions. [2021-10-15 20:14:33,467 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 708 transitions. [2021-10-15 20:14:33,468 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:14:33,468 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 708 transitions. [2021-10-15 20:14:33,471 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 177.0) internal successors, (708), 4 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:14:33,477 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 422.0) internal successors, (2110), 5 states have internal predecessors, (2110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:14:33,479 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 422.0) internal successors, (2110), 5 states have internal predecessors, (2110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:14:33,480 INFO L186 Difference]: Start difference. First operand has 195 places, 373 transitions, 2084 flow. Second operand 4 states and 708 transitions. [2021-10-15 20:14:33,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 754 transitions, 4642 flow [2021-10-15 20:14:33,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 754 transitions, 4586 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 20:14:33,520 INFO L242 Difference]: Finished difference. Result has 200 places, 389 transitions, 2438 flow [2021-10-15 20:14:33,522 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=2032, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2438, PETRI_PLACES=200, PETRI_TRANSITIONS=389} [2021-10-15 20:14:33,522 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, -42 predicate places. [2021-10-15 20:14:33,522 INFO L470 AbstractCegarLoop]: Abstraction has has 200 places, 389 transitions, 2438 flow [2021-10-15 20:14:33,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 84.75) internal successors, (339), 4 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:14:33,523 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:14:33,524 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:14:33,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-15 20:14:33,524 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:14:33,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:14:33,525 INFO L82 PathProgramCache]: Analyzing trace with hash -538318094, now seen corresponding path program 1 times [2021-10-15 20:14:33,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:14:33,526 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212425560] [2021-10-15 20:14:33,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:14:33,526 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:14:33,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:14:33,822 INFO L134 CoverageAnalysis]: Checked inductivity of 746 backedges. 450 proven. 0 refuted. 0 times theorem prover too weak. 296 trivial. 0 not checked. [2021-10-15 20:14:33,823 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:14:33,823 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212425560] [2021-10-15 20:14:33,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212425560] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:14:33,824 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:14:33,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 20:14:33,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79570989] [2021-10-15 20:14:33,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 20:14:33,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:14:33,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 20:14:33,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-15 20:14:33,828 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 422 [2021-10-15 20:14:33,829 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 389 transitions, 2438 flow. Second operand has 4 states, 4 states have (on average 60.25) internal successors, (241), 4 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:14:33,829 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:14:33,829 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 422 [2021-10-15 20:14:33,830 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:14:35,897 INFO L129 PetriNetUnfolder]: 246/2265 cut-off events. [2021-10-15 20:14:35,898 INFO L130 PetriNetUnfolder]: For 2107/2107 co-relation queries the response was YES. [2021-10-15 20:14:35,901 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5566 conditions, 2265 events. 246/2265 cut-off events. For 2107/2107 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 5135 event pairs, 0 based on Foata normal form. 2/2267 useless extension candidates. Maximal degree in co-relation 3044. Up to 1904 conditions per place. [2021-10-15 20:14:35,913 INFO L132 encePairwiseOnDemand]: 390/422 looper letters, 489 selfloop transitions, 16 changer transitions 103/613 dead transitions. [2021-10-15 20:14:35,913 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 613 transitions, 4394 flow [2021-10-15 20:14:35,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 20:14:35,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 20:14:35,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 509 transitions. [2021-10-15 20:14:35,917 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3015402843601896 [2021-10-15 20:14:35,918 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 509 transitions. [2021-10-15 20:14:35,919 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 509 transitions. [2021-10-15 20:14:35,919 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:14:35,920 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 509 transitions. [2021-10-15 20:14:35,923 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 127.25) internal successors, (509), 4 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:14:35,927 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 422.0) internal successors, (2110), 5 states have internal predecessors, (2110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:14:35,929 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 422.0) internal successors, (2110), 5 states have internal predecessors, (2110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:14:35,929 INFO L186 Difference]: Start difference. First operand has 200 places, 389 transitions, 2438 flow. Second operand 4 states and 509 transitions. [2021-10-15 20:14:35,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 613 transitions, 4394 flow [2021-10-15 20:14:35,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 613 transitions, 4344 flow, removed 25 selfloop flow, removed 0 redundant places. [2021-10-15 20:14:35,971 INFO L242 Difference]: Finished difference. Result has 206 places, 335 transitions, 2074 flow [2021-10-15 20:14:35,972 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=2388, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2074, PETRI_PLACES=206, PETRI_TRANSITIONS=335} [2021-10-15 20:14:35,973 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, -36 predicate places. [2021-10-15 20:14:35,973 INFO L470 AbstractCegarLoop]: Abstraction has has 206 places, 335 transitions, 2074 flow [2021-10-15 20:14:35,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 60.25) internal successors, (241), 4 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:14:35,974 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:14:35,974 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2021-10-15 20:14:35,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-15 20:14:35,975 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:14:35,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:14:35,976 INFO L82 PathProgramCache]: Analyzing trace with hash -1120801549, now seen corresponding path program 2 times [2021-10-15 20:14:35,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:14:35,976 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986597554] [2021-10-15 20:14:35,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:14:35,977 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:14:36,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:14:36,346 INFO L134 CoverageAnalysis]: Checked inductivity of 797 backedges. 497 proven. 195 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-10-15 20:14:36,347 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:14:36,347 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986597554] [2021-10-15 20:14:36,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986597554] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:14:36,348 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154055214] [2021-10-15 20:14:36,348 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-15 20:14:36,349 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:14:36,349 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef8638f-698e-499c-a4ac-014bbc8c58e4/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:14:36,355 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef8638f-698e-499c-a4ac-014bbc8c58e4/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:14:36,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef8638f-698e-499c-a4ac-014bbc8c58e4/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-15 20:14:36,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-15 20:14:36,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 20:14:36,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 614 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-15 20:14:36,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:14:39,316 INFO L134 CoverageAnalysis]: Checked inductivity of 797 backedges. 483 proven. 0 refuted. 0 times theorem prover too weak. 314 trivial. 0 not checked. [2021-10-15 20:14:39,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154055214] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:14:39,317 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:14:39,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2021-10-15 20:14:39,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340057634] [2021-10-15 20:14:39,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-15 20:14:39,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:14:39,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-15 20:14:39,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-10-15 20:14:39,324 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 422 [2021-10-15 20:14:39,325 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 335 transitions, 2074 flow. Second operand has 5 states, 5 states have (on average 56.2) internal successors, (281), 5 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:14:39,325 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:14:39,325 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 422 [2021-10-15 20:14:39,325 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:14:41,630 INFO L129 PetriNetUnfolder]: 178/2702 cut-off events. [2021-10-15 20:14:41,630 INFO L130 PetriNetUnfolder]: For 2456/2456 co-relation queries the response was YES. [2021-10-15 20:14:41,637 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6190 conditions, 2702 events. 178/2702 cut-off events. For 2456/2456 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 8091 event pairs, 0 based on Foata normal form. 86/2788 useless extension candidates. Maximal degree in co-relation 4827. Up to 1251 conditions per place. [2021-10-15 20:14:41,650 INFO L132 encePairwiseOnDemand]: 362/422 looper letters, 674 selfloop transitions, 53 changer transitions 0/732 dead transitions. [2021-10-15 20:14:41,650 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 732 transitions, 4492 flow [2021-10-15 20:14:41,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-15 20:14:41,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-10-15 20:14:41,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 720 transitions. [2021-10-15 20:14:41,656 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3412322274881517 [2021-10-15 20:14:41,656 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 720 transitions. [2021-10-15 20:14:41,657 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 720 transitions. [2021-10-15 20:14:41,657 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:14:41,658 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 720 transitions. [2021-10-15 20:14:41,661 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 144.0) internal successors, (720), 5 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:14:41,667 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 422.0) internal successors, (2532), 6 states have internal predecessors, (2532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:14:41,668 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 422.0) internal successors, (2532), 6 states have internal predecessors, (2532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:14:41,668 INFO L186 Difference]: Start difference. First operand has 206 places, 335 transitions, 2074 flow. Second operand 5 states and 720 transitions. [2021-10-15 20:14:41,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 732 transitions, 4492 flow [2021-10-15 20:14:41,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 732 transitions, 4382 flow, removed 39 selfloop flow, removed 3 redundant places. [2021-10-15 20:14:41,705 INFO L242 Difference]: Finished difference. Result has 209 places, 357 transitions, 2574 flow [2021-10-15 20:14:41,706 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=1970, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2574, PETRI_PLACES=209, PETRI_TRANSITIONS=357} [2021-10-15 20:14:41,706 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, -33 predicate places. [2021-10-15 20:14:41,706 INFO L470 AbstractCegarLoop]: Abstraction has has 209 places, 357 transitions, 2574 flow [2021-10-15 20:14:41,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 56.2) internal successors, (281), 5 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:14:41,707 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:14:41,707 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:14:41,762 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef8638f-698e-499c-a4ac-014bbc8c58e4/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-15 20:14:41,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef8638f-698e-499c-a4ac-014bbc8c58e4/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-10-15 20:14:41,935 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:14:41,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:14:41,936 INFO L82 PathProgramCache]: Analyzing trace with hash -1091026898, now seen corresponding path program 1 times [2021-10-15 20:14:41,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:14:41,936 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413241457] [2021-10-15 20:14:41,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:14:41,936 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:14:42,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:14:42,244 INFO L134 CoverageAnalysis]: Checked inductivity of 797 backedges. 483 proven. 0 refuted. 0 times theorem prover too weak. 314 trivial. 0 not checked. [2021-10-15 20:14:42,245 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:14:42,245 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413241457] [2021-10-15 20:14:42,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413241457] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:14:42,246 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:14:42,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 20:14:42,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152691970] [2021-10-15 20:14:42,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:14:42,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:14:42,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:14:42,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 20:14:42,251 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 422 [2021-10-15 20:14:42,252 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 357 transitions, 2574 flow. Second operand has 3 states, 3 states have (on average 90.66666666666667) internal successors, (272), 3 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:14:42,252 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:14:42,252 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 422 [2021-10-15 20:14:42,253 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:14:44,798 INFO L129 PetriNetUnfolder]: 220/3456 cut-off events. [2021-10-15 20:14:44,798 INFO L130 PetriNetUnfolder]: For 3697/3697 co-relation queries the response was YES. [2021-10-15 20:14:44,806 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8042 conditions, 3456 events. 220/3456 cut-off events. For 3697/3697 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 12759 event pairs, 0 based on Foata normal form. 67/3523 useless extension candidates. Maximal degree in co-relation 6570. Up to 2487 conditions per place. [2021-10-15 20:14:44,824 INFO L132 encePairwiseOnDemand]: 364/422 looper letters, 497 selfloop transitions, 72 changer transitions 0/574 dead transitions. [2021-10-15 20:14:44,824 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 574 transitions, 4560 flow [2021-10-15 20:14:44,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:14:44,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:14:44,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 491 transitions. [2021-10-15 20:14:44,828 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.38783570300157977 [2021-10-15 20:14:44,828 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 491 transitions. [2021-10-15 20:14:44,828 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 491 transitions. [2021-10-15 20:14:44,829 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:14:44,829 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 491 transitions. [2021-10-15 20:14:44,831 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 163.66666666666666) internal successors, (491), 3 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:14:44,835 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:14:44,837 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:14:44,837 INFO L186 Difference]: Start difference. First operand has 209 places, 357 transitions, 2574 flow. Second operand 3 states and 491 transitions. [2021-10-15 20:14:44,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 574 transitions, 4560 flow [2021-10-15 20:14:44,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 574 transitions, 4544 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 20:14:44,878 INFO L242 Difference]: Finished difference. Result has 212 places, 399 transitions, 3530 flow [2021-10-15 20:14:44,879 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=2510, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=3530, PETRI_PLACES=212, PETRI_TRANSITIONS=399} [2021-10-15 20:14:44,879 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, -30 predicate places. [2021-10-15 20:14:44,880 INFO L470 AbstractCegarLoop]: Abstraction has has 212 places, 399 transitions, 3530 flow [2021-10-15 20:14:44,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 90.66666666666667) internal successors, (272), 3 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:14:44,880 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:14:44,881 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:14:44,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-15 20:14:44,882 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:14:44,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:14:44,882 INFO L82 PathProgramCache]: Analyzing trace with hash 1499098357, now seen corresponding path program 1 times [2021-10-15 20:14:44,883 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:14:44,883 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981888795] [2021-10-15 20:14:44,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:14:44,883 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:14:44,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:14:45,363 INFO L134 CoverageAnalysis]: Checked inductivity of 797 backedges. 497 proven. 195 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-10-15 20:14:45,363 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:14:45,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981888795] [2021-10-15 20:14:45,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981888795] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:14:45,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420564182] [2021-10-15 20:14:45,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:14:45,365 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:14:45,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef8638f-698e-499c-a4ac-014bbc8c58e4/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:14:45,366 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef8638f-698e-499c-a4ac-014bbc8c58e4/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:14:45,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef8638f-698e-499c-a4ac-014bbc8c58e4/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-15 20:14:45,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:14:45,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 666 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-15 20:14:45,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:14:47,372 INFO L134 CoverageAnalysis]: Checked inductivity of 797 backedges. 247 proven. 0 refuted. 0 times theorem prover too weak. 550 trivial. 0 not checked. [2021-10-15 20:14:47,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420564182] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:14:47,376 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:14:47,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-10-15 20:14:47,378 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251510018] [2021-10-15 20:14:47,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:14:47,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:14:47,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:14:47,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-15 20:14:47,383 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 422 [2021-10-15 20:14:47,384 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 399 transitions, 3530 flow. Second operand has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:14:47,384 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:14:47,384 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 422 [2021-10-15 20:14:47,385 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:14:50,271 INFO L129 PetriNetUnfolder]: 275/4223 cut-off events. [2021-10-15 20:14:50,271 INFO L130 PetriNetUnfolder]: For 6171/6171 co-relation queries the response was YES. [2021-10-15 20:14:50,280 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10177 conditions, 4223 events. 275/4223 cut-off events. For 6171/6171 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 17811 event pairs, 0 based on Foata normal form. 57/4280 useless extension candidates. Maximal degree in co-relation 8210. Up to 2867 conditions per place. [2021-10-15 20:14:50,301 INFO L132 encePairwiseOnDemand]: 364/422 looper letters, 522 selfloop transitions, 102 changer transitions 0/629 dead transitions. [2021-10-15 20:14:50,301 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 629 transitions, 5982 flow [2021-10-15 20:14:50,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:14:50,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:14:50,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 491 transitions. [2021-10-15 20:14:50,305 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.38783570300157977 [2021-10-15 20:14:50,305 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 491 transitions. [2021-10-15 20:14:50,305 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 491 transitions. [2021-10-15 20:14:50,306 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:14:50,306 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 491 transitions. [2021-10-15 20:14:50,309 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 163.66666666666666) internal successors, (491), 3 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:14:50,313 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:14:50,314 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:14:50,314 INFO L186 Difference]: Start difference. First operand has 212 places, 399 transitions, 3530 flow. Second operand 3 states and 491 transitions. [2021-10-15 20:14:50,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 629 transitions, 5982 flow [2021-10-15 20:14:50,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 629 transitions, 5714 flow, removed 50 selfloop flow, removed 2 redundant places. [2021-10-15 20:14:50,371 INFO L242 Difference]: Finished difference. Result has 214 places, 454 transitions, 4718 flow [2021-10-15 20:14:50,372 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=3266, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=4718, PETRI_PLACES=214, PETRI_TRANSITIONS=454} [2021-10-15 20:14:50,372 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, -28 predicate places. [2021-10-15 20:14:50,377 INFO L470 AbstractCegarLoop]: Abstraction has has 214 places, 454 transitions, 4718 flow [2021-10-15 20:14:50,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:14:50,378 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:14:50,379 INFO L254 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:14:50,429 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef8638f-698e-499c-a4ac-014bbc8c58e4/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-15 20:14:50,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef8638f-698e-499c-a4ac-014bbc8c58e4/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:14:50,595 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:14:50,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:14:50,596 INFO L82 PathProgramCache]: Analyzing trace with hash -1008613683, now seen corresponding path program 1 times [2021-10-15 20:14:50,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:14:50,596 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569280392] [2021-10-15 20:14:50,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:14:50,596 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:14:50,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:14:50,968 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 858 proven. 195 refuted. 0 times theorem prover too weak. 167 trivial. 0 not checked. [2021-10-15 20:14:50,968 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:14:50,969 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569280392] [2021-10-15 20:14:50,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569280392] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:14:50,972 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612035407] [2021-10-15 20:14:50,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:14:50,973 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:14:50,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef8638f-698e-499c-a4ac-014bbc8c58e4/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:14:50,974 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef8638f-698e-499c-a4ac-014bbc8c58e4/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:14:51,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef8638f-698e-499c-a4ac-014bbc8c58e4/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-15 20:14:51,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:14:51,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 789 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-15 20:14:51,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:14:53,613 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 309 proven. 0 refuted. 0 times theorem prover too weak. 911 trivial. 0 not checked. [2021-10-15 20:14:53,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612035407] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:14:53,614 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:14:53,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-10-15 20:14:53,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133142206] [2021-10-15 20:14:53,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:14:53,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:14:53,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:14:53,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-10-15 20:14:53,619 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 422 [2021-10-15 20:14:53,619 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 454 transitions, 4718 flow. Second operand has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:14:53,619 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:14:53,620 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 422 [2021-10-15 20:14:53,620 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:14:56,827 INFO L129 PetriNetUnfolder]: 318/4622 cut-off events. [2021-10-15 20:14:56,827 INFO L130 PetriNetUnfolder]: For 8948/8948 co-relation queries the response was YES. [2021-10-15 20:14:56,835 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11455 conditions, 4622 events. 318/4622 cut-off events. For 8948/8948 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 20947 event pairs, 0 based on Foata normal form. 62/4684 useless extension candidates. Maximal degree in co-relation 9808. Up to 3184 conditions per place. [2021-10-15 20:14:56,849 INFO L132 encePairwiseOnDemand]: 364/422 looper letters, 541 selfloop transitions, 126 changer transitions 0/672 dead transitions. [2021-10-15 20:14:56,849 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 672 transitions, 7114 flow [2021-10-15 20:14:56,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:14:56,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:14:56,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 491 transitions. [2021-10-15 20:14:56,855 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.38783570300157977 [2021-10-15 20:14:56,855 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 491 transitions. [2021-10-15 20:14:56,855 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 491 transitions. [2021-10-15 20:14:56,856 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:14:56,856 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 491 transitions. [2021-10-15 20:14:56,859 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 163.66666666666666) internal successors, (491), 3 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:14:56,862 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:14:56,864 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:14:56,864 INFO L186 Difference]: Start difference. First operand has 214 places, 454 transitions, 4718 flow. Second operand 3 states and 491 transitions. [2021-10-15 20:14:56,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 672 transitions, 7114 flow [2021-10-15 20:14:56,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 672 transitions, 6693 flow, removed 77 selfloop flow, removed 3 redundant places. [2021-10-15 20:14:56,926 INFO L242 Difference]: Finished difference. Result has 215 places, 497 transitions, 5687 flow [2021-10-15 20:14:56,927 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=4154, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=445, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=5687, PETRI_PLACES=215, PETRI_TRANSITIONS=497} [2021-10-15 20:14:56,927 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, -27 predicate places. [2021-10-15 20:14:56,927 INFO L470 AbstractCegarLoop]: Abstraction has has 215 places, 497 transitions, 5687 flow [2021-10-15 20:14:56,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:14:56,928 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:14:56,929 INFO L254 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:14:56,959 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef8638f-698e-499c-a4ac-014bbc8c58e4/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-15 20:14:57,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef8638f-698e-499c-a4ac-014bbc8c58e4/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:14:57,131 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:14:57,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:14:57,132 INFO L82 PathProgramCache]: Analyzing trace with hash -2022557042, now seen corresponding path program 1 times [2021-10-15 20:14:57,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:14:57,132 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457266763] [2021-10-15 20:14:57,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:14:57,132 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:14:57,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:14:57,535 INFO L134 CoverageAnalysis]: Checked inductivity of 1318 backedges. 956 proven. 195 refuted. 0 times theorem prover too weak. 167 trivial. 0 not checked. [2021-10-15 20:14:57,535 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:14:57,536 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457266763] [2021-10-15 20:14:57,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457266763] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:14:57,536 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189113538] [2021-10-15 20:14:57,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:14:57,537 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:14:57,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef8638f-698e-499c-a4ac-014bbc8c58e4/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:14:57,543 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef8638f-698e-499c-a4ac-014bbc8c58e4/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:14:57,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef8638f-698e-499c-a4ac-014bbc8c58e4/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-15 20:14:58,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:14:58,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 827 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-15 20:14:58,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:15:00,156 INFO L134 CoverageAnalysis]: Checked inductivity of 1318 backedges. 309 proven. 0 refuted. 0 times theorem prover too weak. 1009 trivial. 0 not checked. [2021-10-15 20:15:00,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189113538] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:15:00,157 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:15:00,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-10-15 20:15:00,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113344395] [2021-10-15 20:15:00,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:15:00,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:15:00,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:15:00,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-10-15 20:15:00,161 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 422 [2021-10-15 20:15:00,161 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 497 transitions, 5687 flow. Second operand has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:00,161 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:15:00,161 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 422 [2021-10-15 20:15:00,162 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:15:04,007 INFO L129 PetriNetUnfolder]: 414/6140 cut-off events. [2021-10-15 20:15:04,007 INFO L130 PetriNetUnfolder]: For 13527/13527 co-relation queries the response was YES. [2021-10-15 20:15:04,018 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15463 conditions, 6140 events. 414/6140 cut-off events. For 13527/13527 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 32881 event pairs, 0 based on Foata normal form. 60/6200 useless extension candidates. Maximal degree in co-relation 14186. Up to 3577 conditions per place. [2021-10-15 20:15:04,023 INFO L132 encePairwiseOnDemand]: 364/422 looper letters, 0 selfloop transitions, 0 changer transitions 766/766 dead transitions. [2021-10-15 20:15:04,023 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 766 transitions, 9483 flow [2021-10-15 20:15:04,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:15:04,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:15:04,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 490 transitions. [2021-10-15 20:15:04,029 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.38704581358609796 [2021-10-15 20:15:04,030 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 490 transitions. [2021-10-15 20:15:04,030 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 490 transitions. [2021-10-15 20:15:04,031 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:15:04,031 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 490 transitions. [2021-10-15 20:15:04,033 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 163.33333333333334) internal successors, (490), 3 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:04,036 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:04,037 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:04,038 INFO L186 Difference]: Start difference. First operand has 215 places, 497 transitions, 5687 flow. Second operand 3 states and 490 transitions. [2021-10-15 20:15:04,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 766 transitions, 9483 flow [2021-10-15 20:15:04,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 766 transitions, 9011 flow, removed 64 selfloop flow, removed 2 redundant places. [2021-10-15 20:15:04,122 INFO L242 Difference]: Finished difference. Result has 213 places, 0 transitions, 0 flow [2021-10-15 20:15:04,123 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=5031, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=473, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=213, PETRI_TRANSITIONS=0} [2021-10-15 20:15:04,123 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, -29 predicate places. [2021-10-15 20:15:04,123 INFO L470 AbstractCegarLoop]: Abstraction has has 213 places, 0 transitions, 0 flow [2021-10-15 20:15:04,124 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:04,126 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 20:15:04,152 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef8638f-698e-499c-a4ac-014bbc8c58e4/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-15 20:15:04,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef8638f-698e-499c-a4ac-014bbc8c58e4/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-10-15 20:15:04,331 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-15 20:15:04,344 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 08:15:04 BoogieIcfgContainer [2021-10-15 20:15:04,345 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-15 20:15:04,346 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-15 20:15:04,346 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-15 20:15:04,346 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-15 20:15:04,347 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 08:14:22" (3/4) ... [2021-10-15 20:15:04,352 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-15 20:15:04,379 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2021-10-15 20:15:04,381 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-15 20:15:04,383 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 20:15:04,385 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 20:15:04,559 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef8638f-698e-499c-a4ac-014bbc8c58e4/bin/uautomizer-hJ6jxDFKc3/witness.graphml [2021-10-15 20:15:04,559 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-15 20:15:04,561 INFO L168 Benchmark]: Toolchain (without parser) took 45212.30 ms. Allocated memory was 109.1 MB in the beginning and 641.7 MB in the end (delta: 532.7 MB). Free memory was 72.2 MB in the beginning and 324.4 MB in the end (delta: -252.3 MB). Peak memory consumption was 280.3 MB. Max. memory is 16.1 GB. [2021-10-15 20:15:04,562 INFO L168 Benchmark]: CDTParser took 0.32 ms. Allocated memory is still 109.1 MB. Free memory was 79.6 MB in the beginning and 79.6 MB in the end (delta: 21.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 20:15:04,562 INFO L168 Benchmark]: CACSL2BoogieTranslator took 892.21 ms. Allocated memory is still 109.1 MB. Free memory was 72.2 MB in the beginning and 62.9 MB in the end (delta: 9.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-15 20:15:04,563 INFO L168 Benchmark]: Boogie Procedure Inliner took 159.76 ms. Allocated memory is still 109.1 MB. Free memory was 62.9 MB in the beginning and 53.7 MB in the end (delta: 9.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-15 20:15:04,563 INFO L168 Benchmark]: Boogie Preprocessor took 144.10 ms. Allocated memory is still 109.1 MB. Free memory was 53.7 MB in the beginning and 47.5 MB in the end (delta: 6.2 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-15 20:15:04,564 INFO L168 Benchmark]: RCFGBuilder took 1860.83 ms. Allocated memory was 109.1 MB in the beginning and 155.2 MB in the end (delta: 46.1 MB). Free memory was 47.5 MB in the beginning and 102.8 MB in the end (delta: -55.3 MB). Peak memory consumption was 26.1 MB. Max. memory is 16.1 GB. [2021-10-15 20:15:04,564 INFO L168 Benchmark]: TraceAbstraction took 41927.89 ms. Allocated memory was 155.2 MB in the beginning and 641.7 MB in the end (delta: 486.5 MB). Free memory was 102.8 MB in the beginning and 342.3 MB in the end (delta: -239.5 MB). Peak memory consumption was 245.9 MB. Max. memory is 16.1 GB. [2021-10-15 20:15:04,565 INFO L168 Benchmark]: Witness Printer took 214.00 ms. Allocated memory is still 641.7 MB. Free memory was 342.3 MB in the beginning and 324.4 MB in the end (delta: 17.9 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. [2021-10-15 20:15:04,567 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32 ms. Allocated memory is still 109.1 MB. Free memory was 79.6 MB in the beginning and 79.6 MB in the end (delta: 21.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 892.21 ms. Allocated memory is still 109.1 MB. Free memory was 72.2 MB in the beginning and 62.9 MB in the end (delta: 9.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 159.76 ms. Allocated memory is still 109.1 MB. Free memory was 62.9 MB in the beginning and 53.7 MB in the end (delta: 9.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 144.10 ms. Allocated memory is still 109.1 MB. Free memory was 53.7 MB in the beginning and 47.5 MB in the end (delta: 6.2 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1860.83 ms. Allocated memory was 109.1 MB in the beginning and 155.2 MB in the end (delta: 46.1 MB). Free memory was 47.5 MB in the beginning and 102.8 MB in the end (delta: -55.3 MB). Peak memory consumption was 26.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 41927.89 ms. Allocated memory was 155.2 MB in the beginning and 641.7 MB in the end (delta: 486.5 MB). Free memory was 102.8 MB in the beginning and 342.3 MB in the end (delta: -239.5 MB). Peak memory consumption was 245.9 MB. Max. memory is 16.1 GB. * Witness Printer took 214.00 ms. Allocated memory is still 641.7 MB. Free memory was 342.3 MB in the beginning and 324.4 MB in the end (delta: 17.9 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 206]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 245 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 24.7ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 41836.6ms, OverallIterations: 11, TraceHistogramMax: 6, EmptinessCheckTime: 0.0ms, AutomataDifference: 26443.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 216.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1177 SDtfs, 1997 SDslu, 0 SDs, 0 SdLazy, 6337 SolverSat, 1191 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 7986.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2269 GetRequests, 2235 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 217.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=5687occurred in iteration=10, InterpolantAutomatonStates: 39, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 422.0ms SsaConstructionTime, 1398.3ms SatisfiabilityAnalysisTime, 10426.1ms InterpolantComputationTime, 6584 NumberOfCodeBlocks, 6584 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 6569 ConstructedInterpolants, 0 QuantifiedInterpolants, 23805 SizeOfPredicates, 0 NumberOfNonLiveVariables, 2896 ConjunctsInSsa, 11 ConjunctsInUnsatCore, 15 InterpolantComputations, 11 PerfectInterpolantSequences, 10309/11089 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-10-15 20:15:04,593 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef8638f-698e-499c-a4ac-014bbc8c58e4/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...