./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem14_label55.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_21d5fa25-2913-46c2-9186-09139c9852ca/bin/uautomizer-hJ6jxDFKc3/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21d5fa25-2913-46c2-9186-09139c9852ca/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_21d5fa25-2913-46c2-9186-09139c9852ca/bin/uautomizer-hJ6jxDFKc3/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21d5fa25-2913-46c2-9186-09139c9852ca/bin/uautomizer-hJ6jxDFKc3/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem14_label55.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21d5fa25-2913-46c2-9186-09139c9852ca/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_21d5fa25-2913-46c2-9186-09139c9852ca/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 2a301598b894469c390b893ff55a4689df36f250 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 20:24:53,269 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-15 20:24:53,272 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-15 20:24:53,329 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-15 20:24:53,330 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-15 20:24:53,335 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-15 20:24:53,337 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-15 20:24:53,342 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-15 20:24:53,345 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-15 20:24:53,351 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-15 20:24:53,352 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-15 20:24:53,354 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-15 20:24:53,355 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-15 20:24:53,358 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-15 20:24:53,361 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-15 20:24:53,369 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-15 20:24:53,371 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-15 20:24:53,372 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-15 20:24:53,375 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-15 20:24:53,383 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-15 20:24:53,386 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-15 20:24:53,387 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-15 20:24:53,391 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-15 20:24:53,392 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-15 20:24:53,402 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-15 20:24:53,402 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-15 20:24:53,403 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-15 20:24:53,405 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-15 20:24:53,406 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-15 20:24:53,408 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-15 20:24:53,408 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-15 20:24:53,409 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-15 20:24:53,431 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-15 20:24:53,433 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-15 20:24:53,435 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-15 20:24:53,435 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-15 20:24:53,436 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-15 20:24:53,436 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-15 20:24:53,437 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-15 20:24:53,438 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-15 20:24:53,439 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-15 20:24:53,440 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21d5fa25-2913-46c2-9186-09139c9852ca/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-15 20:24:53,489 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-15 20:24:53,489 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-15 20:24:53,489 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-15 20:24:53,489 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-15 20:24:53,490 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-15 20:24:53,491 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-15 20:24:53,491 INFO L138 SettingsManager]: * Use SBE=true [2021-10-15 20:24:53,491 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-15 20:24:53,491 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-15 20:24:53,491 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-15 20:24:53,492 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-15 20:24:53,492 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-15 20:24:53,492 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-15 20:24:53,492 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-15 20:24:53,492 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-15 20:24:53,493 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-15 20:24:53,493 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-15 20:24:53,493 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-15 20:24:53,493 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-15 20:24:53,493 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-15 20:24:53,493 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-15 20:24:53,494 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-15 20:24:53,494 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 20:24:53,494 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-15 20:24:53,494 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-15 20:24:53,494 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-15 20:24:53,494 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-15 20:24:53,495 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-15 20:24:53,495 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-15 20:24:53,495 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-15 20:24:53,495 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-15 20:24:53,495 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-15 20:24:53,495 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_21d5fa25-2913-46c2-9186-09139c9852ca/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21d5fa25-2913-46c2-9186-09139c9852ca/bin/uautomizer-hJ6jxDFKc3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2a301598b894469c390b893ff55a4689df36f250 [2021-10-15 20:24:53,774 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-15 20:24:53,794 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-15 20:24:53,797 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-15 20:24:53,798 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-15 20:24:53,799 INFO L275 PluginConnector]: CDTParser initialized [2021-10-15 20:24:53,800 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21d5fa25-2913-46c2-9186-09139c9852ca/bin/uautomizer-hJ6jxDFKc3/../../sv-benchmarks/c/eca-rers2012/Problem14_label55.c [2021-10-15 20:24:53,863 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21d5fa25-2913-46c2-9186-09139c9852ca/bin/uautomizer-hJ6jxDFKc3/data/ff82ec07e/db1bf33ffd9f40f286159de2797d1c45/FLAG99858df06 [2021-10-15 20:24:54,514 INFO L306 CDTParser]: Found 1 translation units. [2021-10-15 20:24:54,514 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21d5fa25-2913-46c2-9186-09139c9852ca/sv-benchmarks/c/eca-rers2012/Problem14_label55.c [2021-10-15 20:24:54,532 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21d5fa25-2913-46c2-9186-09139c9852ca/bin/uautomizer-hJ6jxDFKc3/data/ff82ec07e/db1bf33ffd9f40f286159de2797d1c45/FLAG99858df06 [2021-10-15 20:24:54,711 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21d5fa25-2913-46c2-9186-09139c9852ca/bin/uautomizer-hJ6jxDFKc3/data/ff82ec07e/db1bf33ffd9f40f286159de2797d1c45 [2021-10-15 20:24:54,713 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-15 20:24:54,715 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-15 20:24:54,716 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-15 20:24:54,716 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-15 20:24:54,720 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-15 20:24:54,721 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 08:24:54" (1/1) ... [2021-10-15 20:24:54,722 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7dcfe384 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:24:54, skipping insertion in model container [2021-10-15 20:24:54,722 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 08:24:54" (1/1) ... [2021-10-15 20:24:54,729 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-15 20:24:54,779 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-15 20:24:54,972 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_21d5fa25-2913-46c2-9186-09139c9852ca/sv-benchmarks/c/eca-rers2012/Problem14_label55.c[5831,5844] [2021-10-15 20:24:55,202 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 20:24:55,217 INFO L203 MainTranslator]: Completed pre-run [2021-10-15 20:24:55,247 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_21d5fa25-2913-46c2-9186-09139c9852ca/sv-benchmarks/c/eca-rers2012/Problem14_label55.c[5831,5844] [2021-10-15 20:24:55,411 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 20:24:55,429 INFO L208 MainTranslator]: Completed translation [2021-10-15 20:24:55,430 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:24:55 WrapperNode [2021-10-15 20:24:55,430 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-15 20:24:55,431 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-15 20:24:55,432 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-15 20:24:55,432 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-15 20:24:55,439 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:24:55" (1/1) ... [2021-10-15 20:24:55,467 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:24:55" (1/1) ... [2021-10-15 20:24:55,536 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-15 20:24:55,537 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-15 20:24:55,537 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-15 20:24:55,537 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-15 20:24:55,547 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:24:55" (1/1) ... [2021-10-15 20:24:55,552 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:24:55" (1/1) ... [2021-10-15 20:24:55,558 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:24:55" (1/1) ... [2021-10-15 20:24:55,564 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:24:55" (1/1) ... [2021-10-15 20:24:55,606 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:24:55" (1/1) ... [2021-10-15 20:24:55,616 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:24:55" (1/1) ... [2021-10-15 20:24:55,622 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:24:55" (1/1) ... [2021-10-15 20:24:55,633 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-15 20:24:55,634 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-15 20:24:55,634 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-15 20:24:55,634 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-15 20:24:55,635 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:24:55" (1/1) ... [2021-10-15 20:24:55,643 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 20:24:55,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21d5fa25-2913-46c2-9186-09139c9852ca/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:24:55,686 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21d5fa25-2913-46c2-9186-09139c9852ca/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-15 20:24:55,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21d5fa25-2913-46c2-9186-09139c9852ca/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-15 20:24:55,729 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-15 20:24:55,729 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-15 20:24:55,729 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-15 20:24:55,729 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-15 20:24:57,273 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-15 20:24:57,274 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-15 20:24:57,277 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 08:24:57 BoogieIcfgContainer [2021-10-15 20:24:57,277 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-15 20:24:57,281 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-15 20:24:57,281 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-15 20:24:57,284 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-15 20:24:57,285 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 08:24:54" (1/3) ... [2021-10-15 20:24:57,286 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1df1a295 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 08:24:57, skipping insertion in model container [2021-10-15 20:24:57,286 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:24:55" (2/3) ... [2021-10-15 20:24:57,287 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1df1a295 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 08:24:57, skipping insertion in model container [2021-10-15 20:24:57,287 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 08:24:57" (3/3) ... [2021-10-15 20:24:57,289 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem14_label55.c [2021-10-15 20:24:57,299 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-15 20:24:57,300 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-15 20:24:57,358 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-15 20:24:57,365 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 20:24:57,368 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-15 20:24:57,403 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 245 places, 422 transitions, 844 flow [2021-10-15 20:24:57,503 INFO L129 PetriNetUnfolder]: 178/422 cut-off events. [2021-10-15 20:24:57,504 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 20:24:57,506 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 20:24:57,506 INFO L82 GeneralOperation]: Start removeDead. Operand has 245 places, 422 transitions, 844 flow [2021-10-15 20:24:57,520 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 242 places, 417 transitions, 834 flow [2021-10-15 20:24:57,548 INFO L129 PetriNetUnfolder]: 52/160 cut-off events. [2021-10-15 20:24:57,553 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 20:24:57,553 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:24:57,554 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] [2021-10-15 20:24:57,555 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:24:57,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:24:57,568 INFO L82 PathProgramCache]: Analyzing trace with hash -66916295, now seen corresponding path program 1 times [2021-10-15 20:24:57,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:24:57,580 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812070678] [2021-10-15 20:24:57,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:24:57,582 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:24:57,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:24:57,899 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 20:24:57,900 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:24:57,900 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812070678] [2021-10-15 20:24:57,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812070678] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:24:57,901 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:24:57,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-15 20:24:57,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612067800] [2021-10-15 20:24:57,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:24:57,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:24:57,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:24:57,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 20:24:57,945 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 422 [2021-10-15 20:24:57,948 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 417 transitions, 834 flow. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 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 20:24:57,949 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:24:57,949 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 422 [2021-10-15 20:24:57,951 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:24:59,264 INFO L129 PetriNetUnfolder]: 151/586 cut-off events. [2021-10-15 20:24:59,265 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 20:24:59,266 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1166 conditions, 586 events. 151/586 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 625 event pairs, 0 based on Foata normal form. 77/436 useless extension candidates. Maximal degree in co-relation 1. Up to 316 conditions per place. [2021-10-15 20:24:59,272 INFO L132 encePairwiseOnDemand]: 223/422 looper letters, 452 selfloop transitions, 50 changer transitions 76/583 dead transitions. [2021-10-15 20:24:59,277 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 583 transitions, 2322 flow [2021-10-15 20:24:59,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:24:59,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:24:59,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 802 transitions. [2021-10-15 20:24:59,301 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6334913112164297 [2021-10-15 20:24:59,301 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 802 transitions. [2021-10-15 20:24:59,302 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 802 transitions. [2021-10-15 20:24:59,307 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:24:59,310 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 802 transitions. [2021-10-15 20:24:59,317 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 267.3333333333333) internal successors, (802), 3 states have internal predecessors, (802), 0 states have call successors, (0), 0 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 20:24:59,328 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 20:24:59,330 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 20:24:59,332 INFO L186 Difference]: Start difference. First operand has 242 places, 417 transitions, 834 flow. Second operand 3 states and 802 transitions. [2021-10-15 20:24:59,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 583 transitions, 2322 flow [2021-10-15 20:24:59,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 583 transitions, 2322 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 20:24:59,363 INFO L242 Difference]: Finished difference. Result has 246 places, 310 transitions, 936 flow [2021-10-15 20:24:59,366 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=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=936, PETRI_PLACES=246, PETRI_TRANSITIONS=310} [2021-10-15 20:24:59,367 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, 4 predicate places. [2021-10-15 20:24:59,368 INFO L470 AbstractCegarLoop]: Abstraction has has 246 places, 310 transitions, 936 flow [2021-10-15 20:24:59,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 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 20:24:59,368 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:24:59,369 INFO L254 CegarLoopForPetriNet]: trace histogram [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, 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 20:24:59,370 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-15 20:24:59,371 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:24:59,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:24:59,372 INFO L82 PathProgramCache]: Analyzing trace with hash -2108066841, now seen corresponding path program 1 times [2021-10-15 20:24:59,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:24:59,372 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470639729] [2021-10-15 20:24:59,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:24:59,373 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:24:59,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:24:59,626 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:24:59,626 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:24:59,626 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470639729] [2021-10-15 20:24:59,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470639729] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:24:59,627 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:24:59,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 20:24:59,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895197166] [2021-10-15 20:24:59,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 20:24:59,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:24:59,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 20:24:59,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 20:24:59,632 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 422 [2021-10-15 20:24:59,633 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 310 transitions, 936 flow. Second operand has 4 states, 4 states have (on average 40.25) internal successors, (161), 4 states have internal predecessors, (161), 0 states have call successors, (0), 0 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 20:24:59,633 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:24:59,633 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 422 [2021-10-15 20:24:59,633 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:25:01,013 INFO L129 PetriNetUnfolder]: 187/902 cut-off events. [2021-10-15 20:25:01,014 INFO L130 PetriNetUnfolder]: For 63/63 co-relation queries the response was YES. [2021-10-15 20:25:01,017 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1963 conditions, 902 events. 187/902 cut-off events. For 63/63 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 973 event pairs, 0 based on Foata normal form. 20/850 useless extension candidates. Maximal degree in co-relation 1196. Up to 533 conditions per place. [2021-10-15 20:25:01,027 INFO L132 encePairwiseOnDemand]: 385/422 looper letters, 654 selfloop transitions, 37 changer transitions 0/696 dead transitions. [2021-10-15 20:25:01,029 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 696 transitions, 3112 flow [2021-10-15 20:25:01,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 20:25:01,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 20:25:01,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 745 transitions. [2021-10-15 20:25:01,034 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.44135071090047395 [2021-10-15 20:25:01,035 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 745 transitions. [2021-10-15 20:25:01,035 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 745 transitions. [2021-10-15 20:25:01,037 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:25:01,040 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 745 transitions. [2021-10-15 20:25:01,044 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 186.25) internal successors, (745), 4 states have internal predecessors, (745), 0 states have call successors, (0), 0 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 20:25:01,049 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 20:25:01,052 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 20:25:01,052 INFO L186 Difference]: Start difference. First operand has 246 places, 310 transitions, 936 flow. Second operand 4 states and 745 transitions. [2021-10-15 20:25:01,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 696 transitions, 3112 flow [2021-10-15 20:25:01,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 696 transitions, 3006 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 20:25:01,090 INFO L242 Difference]: Finished difference. Result has 189 places, 344 transitions, 1146 flow [2021-10-15 20:25:01,091 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=836, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1146, PETRI_PLACES=189, PETRI_TRANSITIONS=344} [2021-10-15 20:25:01,098 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, -53 predicate places. [2021-10-15 20:25:01,099 INFO L470 AbstractCegarLoop]: Abstraction has has 189 places, 344 transitions, 1146 flow [2021-10-15 20:25:01,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.25) internal successors, (161), 4 states have internal predecessors, (161), 0 states have call successors, (0), 0 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 20:25:01,099 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:25:01,101 INFO L254 CegarLoopForPetriNet]: trace histogram [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, 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, 1, 1, 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 20:25:01,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-15 20:25:01,102 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:25:01,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:25:01,106 INFO L82 PathProgramCache]: Analyzing trace with hash -525654712, now seen corresponding path program 1 times [2021-10-15 20:25:01,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:25:01,107 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90619840] [2021-10-15 20:25:01,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:25:01,107 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:25:01,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:25:01,361 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-10-15 20:25:01,361 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:25:01,362 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90619840] [2021-10-15 20:25:01,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90619840] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:25:01,363 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596023562] [2021-10-15 20:25:01,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:25:01,364 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:25:01,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21d5fa25-2913-46c2-9186-09139c9852ca/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:25:01,370 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21d5fa25-2913-46c2-9186-09139c9852ca/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:25:01,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21d5fa25-2913-46c2-9186-09139c9852ca/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-15 20:25:01,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:25:01,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-15 20:25:01,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:25:02,149 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-10-15 20:25:02,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596023562] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:25:02,150 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:25:02,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2021-10-15 20:25:02,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766379228] [2021-10-15 20:25:02,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:25:02,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:25:02,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:25:02,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-15 20:25:02,157 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 422 [2021-10-15 20:25:02,157 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 344 transitions, 1146 flow. Second operand has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 0 states have call successors, (0), 0 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 20:25:02,157 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:25:02,158 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 422 [2021-10-15 20:25:02,158 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:25:03,274 INFO L129 PetriNetUnfolder]: 361/1610 cut-off events. [2021-10-15 20:25:03,275 INFO L130 PetriNetUnfolder]: For 143/143 co-relation queries the response was YES. [2021-10-15 20:25:03,276 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3732 conditions, 1610 events. 361/1610 cut-off events. For 143/143 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 2827 event pairs, 0 based on Foata normal form. 1/1611 useless extension candidates. Maximal degree in co-relation 1594. Up to 815 conditions per place. [2021-10-15 20:25:03,285 INFO L132 encePairwiseOnDemand]: 306/422 looper letters, 503 selfloop transitions, 162 changer transitions 0/670 dead transitions. [2021-10-15 20:25:03,285 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 670 transitions, 3544 flow [2021-10-15 20:25:03,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:25:03,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:25:03,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 605 transitions. [2021-10-15 20:25:03,289 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.47788309636650866 [2021-10-15 20:25:03,289 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 605 transitions. [2021-10-15 20:25:03,289 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 605 transitions. [2021-10-15 20:25:03,290 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:25:03,290 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 605 transitions. [2021-10-15 20:25:03,292 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 201.66666666666666) internal successors, (605), 3 states have internal predecessors, (605), 0 states have call successors, (0), 0 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 20:25:03,296 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 20:25:03,297 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 20:25:03,297 INFO L186 Difference]: Start difference. First operand has 189 places, 344 transitions, 1146 flow. Second operand 3 states and 605 transitions. [2021-10-15 20:25:03,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 670 transitions, 3544 flow [2021-10-15 20:25:03,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 670 transitions, 3524 flow, removed 10 selfloop flow, removed 0 redundant places. [2021-10-15 20:25:03,325 INFO L242 Difference]: Finished difference. Result has 193 places, 495 transitions, 2796 flow [2021-10-15 20:25:03,326 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=1136, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2796, PETRI_PLACES=193, PETRI_TRANSITIONS=495} [2021-10-15 20:25:03,326 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, -49 predicate places. [2021-10-15 20:25:03,326 INFO L470 AbstractCegarLoop]: Abstraction has has 193 places, 495 transitions, 2796 flow [2021-10-15 20:25:03,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 0 states have call successors, (0), 0 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 20:25:03,328 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:25:03,329 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, 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] [2021-10-15 20:25:03,363 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21d5fa25-2913-46c2-9186-09139c9852ca/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-15 20:25:03,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21d5fa25-2913-46c2-9186-09139c9852ca/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:25:03,544 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:25:03,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:25:03,544 INFO L82 PathProgramCache]: Analyzing trace with hash 2083123476, now seen corresponding path program 1 times [2021-10-15 20:25:03,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:25:03,545 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516481803] [2021-10-15 20:25:03,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:25:03,545 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:25:03,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:25:03,748 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 161 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-10-15 20:25:03,748 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:25:03,751 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516481803] [2021-10-15 20:25:03,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516481803] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:25:03,752 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:25:03,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 20:25:03,753 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237325786] [2021-10-15 20:25:03,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 20:25:03,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:25:03,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 20:25:03,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-15 20:25:03,757 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 422 [2021-10-15 20:25:03,758 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 495 transitions, 2796 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 20:25:03,758 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:25:03,758 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 422 [2021-10-15 20:25:03,758 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:25:05,414 INFO L129 PetriNetUnfolder]: 420/2054 cut-off events. [2021-10-15 20:25:05,414 INFO L130 PetriNetUnfolder]: For 1372/1372 co-relation queries the response was YES. [2021-10-15 20:25:05,416 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5349 conditions, 2054 events. 420/2054 cut-off events. For 1372/1372 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 4417 event pairs, 0 based on Foata normal form. 13/2067 useless extension candidates. Maximal degree in co-relation 3573. Up to 919 conditions per place. [2021-10-15 20:25:05,426 INFO L132 encePairwiseOnDemand]: 351/422 looper letters, 519 selfloop transitions, 18 changer transitions 213/755 dead transitions. [2021-10-15 20:25:05,427 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 755 transitions, 5216 flow [2021-10-15 20:25:05,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 20:25:05,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 20:25:05,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 560 transitions. [2021-10-15 20:25:05,430 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.33175355450236965 [2021-10-15 20:25:05,431 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 560 transitions. [2021-10-15 20:25:05,431 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 560 transitions. [2021-10-15 20:25:05,431 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:25:05,432 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 560 transitions. [2021-10-15 20:25:05,434 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 140.0) internal successors, (560), 4 states have internal predecessors, (560), 0 states have call successors, (0), 0 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 20:25:05,438 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 20:25:05,440 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 20:25:05,441 INFO L186 Difference]: Start difference. First operand has 193 places, 495 transitions, 2796 flow. Second operand 4 states and 560 transitions. [2021-10-15 20:25:05,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 755 transitions, 5216 flow [2021-10-15 20:25:05,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 755 transitions, 4750 flow, removed 41 selfloop flow, removed 2 redundant places. [2021-10-15 20:25:05,483 INFO L242 Difference]: Finished difference. Result has 196 places, 363 transitions, 1738 flow [2021-10-15 20:25:05,484 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=2426, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=495, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=477, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1738, PETRI_PLACES=196, PETRI_TRANSITIONS=363} [2021-10-15 20:25:05,484 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, -46 predicate places. [2021-10-15 20:25:05,484 INFO L470 AbstractCegarLoop]: Abstraction has has 196 places, 363 transitions, 1738 flow [2021-10-15 20:25:05,485 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 20:25:05,485 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:25:05,485 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, 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, 1, 1, 1, 1] [2021-10-15 20:25:05,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-15 20:25:05,486 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:25:05,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:25:05,486 INFO L82 PathProgramCache]: Analyzing trace with hash -971236136, now seen corresponding path program 1 times [2021-10-15 20:25:05,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:25:05,487 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382787059] [2021-10-15 20:25:05,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:25:05,487 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:25:05,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:25:05,648 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 109 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:25:05,648 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:25:05,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382787059] [2021-10-15 20:25:05,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382787059] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:25:05,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032125533] [2021-10-15 20:25:05,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:25:05,649 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:25:05,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21d5fa25-2913-46c2-9186-09139c9852ca/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:25:05,653 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21d5fa25-2913-46c2-9186-09139c9852ca/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:25:05,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21d5fa25-2913-46c2-9186-09139c9852ca/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-15 20:25:05,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:25:05,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-15 20:25:05,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:25:06,435 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 109 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-10-15 20:25:06,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032125533] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:25:06,436 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:25:06,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2021-10-15 20:25:06,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876250130] [2021-10-15 20:25:06,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:25:06,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:25:06,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:25:06,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-15 20:25:06,440 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 422 [2021-10-15 20:25:06,441 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 363 transitions, 1738 flow. Second operand has 3 states, 3 states have (on average 60.0) internal successors, (180), 3 states have internal predecessors, (180), 0 states have call successors, (0), 0 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 20:25:06,441 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:25:06,441 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 422 [2021-10-15 20:25:06,441 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:25:07,611 INFO L129 PetriNetUnfolder]: 208/1813 cut-off events. [2021-10-15 20:25:07,611 INFO L130 PetriNetUnfolder]: For 835/835 co-relation queries the response was YES. [2021-10-15 20:25:07,613 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4202 conditions, 1813 events. 208/1813 cut-off events. For 835/835 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 3939 event pairs, 0 based on Foata normal form. 96/1909 useless extension candidates. Maximal degree in co-relation 3147. Up to 1585 conditions per place. [2021-10-15 20:25:07,622 INFO L132 encePairwiseOnDemand]: 346/422 looper letters, 452 selfloop transitions, 72 changer transitions 0/529 dead transitions. [2021-10-15 20:25:07,622 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 529 transitions, 3077 flow [2021-10-15 20:25:07,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:25:07,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:25:07,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 526 transitions. [2021-10-15 20:25:07,625 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4154818325434439 [2021-10-15 20:25:07,625 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 526 transitions. [2021-10-15 20:25:07,625 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 526 transitions. [2021-10-15 20:25:07,626 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:25:07,626 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 526 transitions. [2021-10-15 20:25:07,628 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 20:25:07,631 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 20:25:07,633 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 20:25:07,633 INFO L186 Difference]: Start difference. First operand has 196 places, 363 transitions, 1738 flow. Second operand 3 states and 526 transitions. [2021-10-15 20:25:07,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 529 transitions, 3077 flow [2021-10-15 20:25:07,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 529 transitions, 2948 flow, removed 58 selfloop flow, removed 2 redundant places. [2021-10-15 20:25:07,659 INFO L242 Difference]: Finished difference. Result has 197 places, 354 transitions, 1934 flow [2021-10-15 20:25:07,660 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=1315, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1934, PETRI_PLACES=197, PETRI_TRANSITIONS=354} [2021-10-15 20:25:07,660 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, -45 predicate places. [2021-10-15 20:25:07,660 INFO L470 AbstractCegarLoop]: Abstraction has has 197 places, 354 transitions, 1934 flow [2021-10-15 20:25:07,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.0) internal successors, (180), 3 states have internal predecessors, (180), 0 states have call successors, (0), 0 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 20:25:07,661 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:25:07,661 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, 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, 1] [2021-10-15 20:25:07,700 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21d5fa25-2913-46c2-9186-09139c9852ca/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-15 20:25:07,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21d5fa25-2913-46c2-9186-09139c9852ca/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:25:07,889 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:25:07,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:25:07,889 INFO L82 PathProgramCache]: Analyzing trace with hash -39272449, now seen corresponding path program 1 times [2021-10-15 20:25:07,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:25:07,889 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28284983] [2021-10-15 20:25:07,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:25:07,890 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:25:07,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:25:08,020 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 177 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:25:08,020 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:25:08,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28284983] [2021-10-15 20:25:08,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28284983] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:25:08,021 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:25:08,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 20:25:08,022 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883207685] [2021-10-15 20:25:08,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:25:08,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:25:08,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:25:08,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 20:25:08,028 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 422 [2021-10-15 20:25:08,029 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 354 transitions, 1934 flow. Second operand has 3 states, 3 states have (on average 81.66666666666667) internal successors, (245), 3 states have internal predecessors, (245), 0 states have call successors, (0), 0 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 20:25:08,029 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:25:08,029 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 422 [2021-10-15 20:25:08,029 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:25:09,652 INFO L129 PetriNetUnfolder]: 259/2576 cut-off events. [2021-10-15 20:25:09,653 INFO L130 PetriNetUnfolder]: For 1626/1626 co-relation queries the response was YES. [2021-10-15 20:25:09,656 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5996 conditions, 2576 events. 259/2576 cut-off events. For 1626/1626 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 6731 event pairs, 0 based on Foata normal form. 101/2677 useless extension candidates. Maximal degree in co-relation 5031. Up to 1816 conditions per place. [2021-10-15 20:25:09,667 INFO L132 encePairwiseOnDemand]: 345/422 looper letters, 506 selfloop transitions, 68 changer transitions 0/579 dead transitions. [2021-10-15 20:25:09,668 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 579 transitions, 3866 flow [2021-10-15 20:25:09,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:25:09,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:25:09,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 527 transitions. [2021-10-15 20:25:09,671 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.41627172195892576 [2021-10-15 20:25:09,671 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 527 transitions. [2021-10-15 20:25:09,671 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 527 transitions. [2021-10-15 20:25:09,672 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:25:09,672 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 527 transitions. [2021-10-15 20:25:09,674 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 175.66666666666666) internal successors, (527), 3 states have internal predecessors, (527), 0 states have call successors, (0), 0 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 20:25:09,678 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 20:25:09,679 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 20:25:09,679 INFO L186 Difference]: Start difference. First operand has 197 places, 354 transitions, 1934 flow. Second operand 3 states and 527 transitions. [2021-10-15 20:25:09,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 579 transitions, 3866 flow [2021-10-15 20:25:09,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 579 transitions, 3448 flow, removed 113 selfloop flow, removed 2 redundant places. [2021-10-15 20:25:09,704 INFO L242 Difference]: Finished difference. Result has 199 places, 404 transitions, 2504 flow [2021-10-15 20:25:09,705 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=1628, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2504, PETRI_PLACES=199, PETRI_TRANSITIONS=404} [2021-10-15 20:25:09,705 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, -43 predicate places. [2021-10-15 20:25:09,705 INFO L470 AbstractCegarLoop]: Abstraction has has 199 places, 404 transitions, 2504 flow [2021-10-15 20:25:09,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.66666666666667) internal successors, (245), 3 states have internal predecessors, (245), 0 states have call successors, (0), 0 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 20:25:09,706 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:25:09,706 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, 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, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:25:09,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-15 20:25:09,707 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:25:09,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:25:09,707 INFO L82 PathProgramCache]: Analyzing trace with hash -1928919929, now seen corresponding path program 1 times [2021-10-15 20:25:09,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:25:09,710 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847784779] [2021-10-15 20:25:09,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:25:09,710 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:25:09,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:25:09,938 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 164 proven. 0 refuted. 0 times theorem prover too weak. 263 trivial. 0 not checked. [2021-10-15 20:25:09,939 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:25:09,939 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847784779] [2021-10-15 20:25:09,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847784779] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:25:09,940 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:25:09,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 20:25:09,940 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645268395] [2021-10-15 20:25:09,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 20:25:09,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:25:09,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 20:25:09,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-15 20:25:09,944 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 422 [2021-10-15 20:25:09,944 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 404 transitions, 2504 flow. Second operand has 4 states, 4 states have (on average 47.5) internal successors, (190), 4 states have internal predecessors, (190), 0 states have call successors, (0), 0 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 20:25:09,945 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:25:09,945 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 422 [2021-10-15 20:25:09,945 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:25:12,080 INFO L129 PetriNetUnfolder]: 281/2834 cut-off events. [2021-10-15 20:25:12,081 INFO L130 PetriNetUnfolder]: For 1581/1581 co-relation queries the response was YES. [2021-10-15 20:25:12,086 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6699 conditions, 2834 events. 281/2834 cut-off events. For 1581/1581 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 8122 event pairs, 0 based on Foata normal form. 2/2836 useless extension candidates. Maximal degree in co-relation 5529. Up to 2450 conditions per place. [2021-10-15 20:25:12,098 INFO L132 encePairwiseOnDemand]: 390/422 looper letters, 502 selfloop transitions, 17 changer transitions 104/628 dead transitions. [2021-10-15 20:25:12,098 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 628 transitions, 4379 flow [2021-10-15 20:25:12,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 20:25:12,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 20:25:12,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 509 transitions. [2021-10-15 20:25:12,102 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3015402843601896 [2021-10-15 20:25:12,102 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 509 transitions. [2021-10-15 20:25:12,102 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 509 transitions. [2021-10-15 20:25:12,103 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:25:12,103 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 509 transitions. [2021-10-15 20:25:12,105 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 20:25:12,109 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 20:25:12,110 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 20:25:12,110 INFO L186 Difference]: Start difference. First operand has 199 places, 404 transitions, 2504 flow. Second operand 4 states and 509 transitions. [2021-10-15 20:25:12,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 628 transitions, 4379 flow [2021-10-15 20:25:12,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 628 transitions, 4215 flow, removed 12 selfloop flow, removed 2 redundant places. [2021-10-15 20:25:12,140 INFO L242 Difference]: Finished difference. Result has 203 places, 349 transitions, 1985 flow [2021-10-15 20:25:12,140 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=2344, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1985, PETRI_PLACES=203, PETRI_TRANSITIONS=349} [2021-10-15 20:25:12,141 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, -39 predicate places. [2021-10-15 20:25:12,141 INFO L470 AbstractCegarLoop]: Abstraction has has 203 places, 349 transitions, 1985 flow [2021-10-15 20:25:12,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 47.5) internal successors, (190), 4 states have internal predecessors, (190), 0 states have call successors, (0), 0 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 20:25:12,141 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:25:12,142 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, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2021-10-15 20:25:12,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-15 20:25:12,142 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:25:12,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:25:12,143 INFO L82 PathProgramCache]: Analyzing trace with hash 577845055, now seen corresponding path program 1 times [2021-10-15 20:25:12,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:25:12,143 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885022413] [2021-10-15 20:25:12,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:25:12,144 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:25:12,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:25:12,317 INFO L134 CoverageAnalysis]: Checked inductivity of 739 backedges. 425 proven. 0 refuted. 0 times theorem prover too weak. 314 trivial. 0 not checked. [2021-10-15 20:25:12,318 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:25:12,318 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885022413] [2021-10-15 20:25:12,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885022413] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:25:12,318 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:25:12,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 20:25:12,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464868319] [2021-10-15 20:25:12,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:25:12,320 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:25:12,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:25:12,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 20:25:12,322 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 422 [2021-10-15 20:25:12,323 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 349 transitions, 1985 flow. Second operand has 3 states, 3 states have (on average 82.66666666666667) internal successors, (248), 3 states have internal predecessors, (248), 0 states have call successors, (0), 0 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 20:25:12,323 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:25:12,323 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 422 [2021-10-15 20:25:12,323 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:25:13,999 INFO L129 PetriNetUnfolder]: 169/3020 cut-off events. [2021-10-15 20:25:13,999 INFO L130 PetriNetUnfolder]: For 1443/1443 co-relation queries the response was YES. [2021-10-15 20:25:14,003 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6664 conditions, 3020 events. 169/3020 cut-off events. For 1443/1443 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 9922 event pairs, 0 based on Foata normal form. 92/3112 useless extension candidates. Maximal degree in co-relation 5915. Up to 2083 conditions per place. [2021-10-15 20:25:14,015 INFO L132 encePairwiseOnDemand]: 365/422 looper letters, 498 selfloop transitions, 16 changer transitions 0/519 dead transitions. [2021-10-15 20:25:14,015 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 519 transitions, 3312 flow [2021-10-15 20:25:14,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:25:14,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:25:14,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 490 transitions. [2021-10-15 20:25:14,019 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.38704581358609796 [2021-10-15 20:25:14,019 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 490 transitions. [2021-10-15 20:25:14,019 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 490 transitions. [2021-10-15 20:25:14,020 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:25:14,020 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 490 transitions. [2021-10-15 20:25:14,022 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 20:25:14,025 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 20:25:14,026 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 20:25:14,027 INFO L186 Difference]: Start difference. First operand has 203 places, 349 transitions, 1985 flow. Second operand 3 states and 490 transitions. [2021-10-15 20:25:14,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 519 transitions, 3312 flow [2021-10-15 20:25:14,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 519 transitions, 3211 flow, removed 33 selfloop flow, removed 4 redundant places. [2021-10-15 20:25:14,050 INFO L242 Difference]: Finished difference. Result has 201 places, 344 transitions, 2037 flow [2021-10-15 20:25:14,051 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=1807, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2037, PETRI_PLACES=201, PETRI_TRANSITIONS=344} [2021-10-15 20:25:14,051 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, -41 predicate places. [2021-10-15 20:25:14,051 INFO L470 AbstractCegarLoop]: Abstraction has has 201 places, 344 transitions, 2037 flow [2021-10-15 20:25:14,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.66666666666667) internal successors, (248), 3 states have internal predecessors, (248), 0 states have call successors, (0), 0 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 20:25:14,052 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:25:14,052 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, 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, 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 20:25:14,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-15 20:25:14,053 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:25:14,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:25:14,053 INFO L82 PathProgramCache]: Analyzing trace with hash 1408157574, now seen corresponding path program 1 times [2021-10-15 20:25:14,054 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:25:14,054 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141655257] [2021-10-15 20:25:14,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:25:14,054 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:25:14,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:25:14,268 INFO L134 CoverageAnalysis]: Checked inductivity of 739 backedges. 425 proven. 0 refuted. 0 times theorem prover too weak. 314 trivial. 0 not checked. [2021-10-15 20:25:14,268 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:25:14,268 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141655257] [2021-10-15 20:25:14,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141655257] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:25:14,269 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:25:14,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 20:25:14,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211768612] [2021-10-15 20:25:14,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:25:14,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:25:14,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:25:14,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 20:25:14,273 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 422 [2021-10-15 20:25:14,273 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 344 transitions, 2037 flow. Second operand has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 0 states have call successors, (0), 0 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 20:25:14,274 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:25:14,274 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 422 [2021-10-15 20:25:14,274 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:25:16,471 INFO L129 PetriNetUnfolder]: 239/3802 cut-off events. [2021-10-15 20:25:16,471 INFO L130 PetriNetUnfolder]: For 2013/2013 co-relation queries the response was YES. [2021-10-15 20:25:16,476 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8532 conditions, 3802 events. 239/3802 cut-off events. For 2013/2013 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 15039 event pairs, 0 based on Foata normal form. 41/3843 useless extension candidates. Maximal degree in co-relation 7639. Up to 2573 conditions per place. [2021-10-15 20:25:16,491 INFO L132 encePairwiseOnDemand]: 364/422 looper letters, 475 selfloop transitions, 110 changer transitions 0/590 dead transitions. [2021-10-15 20:25:16,491 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 590 transitions, 4261 flow [2021-10-15 20:25:16,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:25:16,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:25:16,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 491 transitions. [2021-10-15 20:25:16,495 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.38783570300157977 [2021-10-15 20:25:16,495 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 491 transitions. [2021-10-15 20:25:16,495 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 491 transitions. [2021-10-15 20:25:16,496 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:25:16,498 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 491 transitions. [2021-10-15 20:25:16,500 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 20:25:16,504 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 20:25:16,505 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 20:25:16,505 INFO L186 Difference]: Start difference. First operand has 201 places, 344 transitions, 2037 flow. Second operand 3 states and 491 transitions. [2021-10-15 20:25:16,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 590 transitions, 4261 flow [2021-10-15 20:25:16,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 590 transitions, 4235 flow, removed 6 selfloop flow, removed 1 redundant places. [2021-10-15 20:25:16,533 INFO L242 Difference]: Finished difference. Result has 204 places, 415 transitions, 3355 flow [2021-10-15 20:25:16,534 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=1989, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=3355, PETRI_PLACES=204, PETRI_TRANSITIONS=415} [2021-10-15 20:25:16,534 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, -38 predicate places. [2021-10-15 20:25:16,534 INFO L470 AbstractCegarLoop]: Abstraction has has 204 places, 415 transitions, 3355 flow [2021-10-15 20:25:16,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 0 states have call successors, (0), 0 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 20:25:16,535 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:25:16,535 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, 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, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:25:16,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-15 20:25:16,536 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:25:16,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:25:16,537 INFO L82 PathProgramCache]: Analyzing trace with hash -614119137, now seen corresponding path program 1 times [2021-10-15 20:25:16,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:25:16,537 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487490701] [2021-10-15 20:25:16,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:25:16,538 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:25:16,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:25:16,739 INFO L134 CoverageAnalysis]: Checked inductivity of 853 backedges. 539 proven. 0 refuted. 0 times theorem prover too weak. 314 trivial. 0 not checked. [2021-10-15 20:25:16,739 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:25:16,739 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487490701] [2021-10-15 20:25:16,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487490701] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:25:16,739 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:25:16,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 20:25:16,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936948544] [2021-10-15 20:25:16,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:25:16,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:25:16,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:25:16,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 20:25:16,743 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 422 [2021-10-15 20:25:16,743 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 415 transitions, 3355 flow. Second operand has 3 states, 3 states have (on average 98.66666666666667) internal successors, (296), 3 states have internal predecessors, (296), 0 states have call successors, (0), 0 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 20:25:16,744 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:25:16,744 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 422 [2021-10-15 20:25:16,744 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:25:19,395 INFO L129 PetriNetUnfolder]: 314/4945 cut-off events. [2021-10-15 20:25:19,396 INFO L130 PetriNetUnfolder]: For 5340/5340 co-relation queries the response was YES. [2021-10-15 20:25:19,400 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11541 conditions, 4945 events. 314/4945 cut-off events. For 5340/5340 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 23077 event pairs, 0 based on Foata normal form. 100/5045 useless extension candidates. Maximal degree in co-relation 10567. Up to 3103 conditions per place. [2021-10-15 20:25:19,413 INFO L132 encePairwiseOnDemand]: 366/422 looper letters, 570 selfloop transitions, 90 changer transitions 0/665 dead transitions. [2021-10-15 20:25:19,414 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 665 transitions, 6032 flow [2021-10-15 20:25:19,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:25:19,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:25:19,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 491 transitions. [2021-10-15 20:25:19,417 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.38783570300157977 [2021-10-15 20:25:19,417 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 491 transitions. [2021-10-15 20:25:19,418 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 491 transitions. [2021-10-15 20:25:19,418 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:25:19,418 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 491 transitions. [2021-10-15 20:25:19,420 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 20:25:19,424 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 20:25:19,425 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 20:25:19,425 INFO L186 Difference]: Start difference. First operand has 204 places, 415 transitions, 3355 flow. Second operand 3 states and 491 transitions. [2021-10-15 20:25:19,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 665 transitions, 6032 flow [2021-10-15 20:25:19,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 665 transitions, 5606 flow, removed 72 selfloop flow, removed 2 redundant places. [2021-10-15 20:25:19,466 INFO L242 Difference]: Finished difference. Result has 206 places, 481 transitions, 4496 flow [2021-10-15 20:25:19,467 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=3001, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=4496, PETRI_PLACES=206, PETRI_TRANSITIONS=481} [2021-10-15 20:25:19,467 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, -36 predicate places. [2021-10-15 20:25:19,467 INFO L470 AbstractCegarLoop]: Abstraction has has 206 places, 481 transitions, 4496 flow [2021-10-15 20:25:19,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 98.66666666666667) internal successors, (296), 3 states have internal predecessors, (296), 0 states have call successors, (0), 0 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 20:25:19,468 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:25:19,469 INFO L254 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:25:19,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-15 20:25:19,469 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:25:19,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:25:19,470 INFO L82 PathProgramCache]: Analyzing trace with hash -596499667, now seen corresponding path program 1 times [2021-10-15 20:25:19,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:25:19,470 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381460225] [2021-10-15 20:25:19,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:25:19,471 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:25:19,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:25:19,801 INFO L134 CoverageAnalysis]: Checked inductivity of 1617 backedges. 1144 proven. 104 refuted. 0 times theorem prover too weak. 369 trivial. 0 not checked. [2021-10-15 20:25:19,801 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:25:19,801 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381460225] [2021-10-15 20:25:19,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381460225] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:25:19,802 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704864587] [2021-10-15 20:25:19,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:25:19,802 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:25:19,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21d5fa25-2913-46c2-9186-09139c9852ca/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:25:19,803 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21d5fa25-2913-46c2-9186-09139c9852ca/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:25:19,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21d5fa25-2913-46c2-9186-09139c9852ca/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-15 20:25:20,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:25:20,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 836 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-15 20:25:20,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:25:21,606 INFO L134 CoverageAnalysis]: Checked inductivity of 1617 backedges. 329 proven. 0 refuted. 0 times theorem prover too weak. 1288 trivial. 0 not checked. [2021-10-15 20:25:21,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704864587] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:25:21,607 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:25:21,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-10-15 20:25:21,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789179075] [2021-10-15 20:25:21,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:25:21,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:25:21,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:25:21,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-10-15 20:25:21,612 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 422 [2021-10-15 20:25:21,612 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 481 transitions, 4496 flow. Second operand has 3 states, 3 states have (on average 64.0) internal successors, (192), 3 states have internal predecessors, (192), 0 states have call successors, (0), 0 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 20:25:21,612 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:25:21,612 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 422 [2021-10-15 20:25:21,612 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:25:24,543 INFO L129 PetriNetUnfolder]: 285/5094 cut-off events. [2021-10-15 20:25:24,543 INFO L130 PetriNetUnfolder]: For 5101/5101 co-relation queries the response was YES. [2021-10-15 20:25:24,549 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11819 conditions, 5094 events. 285/5094 cut-off events. For 5101/5101 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 24818 event pairs, 0 based on Foata normal form. 58/5152 useless extension candidates. Maximal degree in co-relation 10959. Up to 3685 conditions per place. [2021-10-15 20:25:24,560 INFO L132 encePairwiseOnDemand]: 384/422 looper letters, 531 selfloop transitions, 63 changer transitions 36/635 dead transitions. [2021-10-15 20:25:24,560 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 635 transitions, 5872 flow [2021-10-15 20:25:24,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:25:24,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:25:24,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 458 transitions. [2021-10-15 20:25:24,563 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3617693522906793 [2021-10-15 20:25:24,564 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 458 transitions. [2021-10-15 20:25:24,564 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 458 transitions. [2021-10-15 20:25:24,564 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:25:24,565 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 458 transitions. [2021-10-15 20:25:24,566 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 152.66666666666666) internal successors, (458), 3 states have internal predecessors, (458), 0 states have call successors, (0), 0 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 20:25:24,569 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 20:25:24,570 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 20:25:24,570 INFO L186 Difference]: Start difference. First operand has 206 places, 481 transitions, 4496 flow. Second operand 3 states and 458 transitions. [2021-10-15 20:25:24,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 635 transitions, 5872 flow [2021-10-15 20:25:24,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 635 transitions, 5700 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 20:25:24,614 INFO L242 Difference]: Finished difference. Result has 208 places, 424 transitions, 3904 flow [2021-10-15 20:25:24,615 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=4007, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=391, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=3904, PETRI_PLACES=208, PETRI_TRANSITIONS=424} [2021-10-15 20:25:24,616 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, -34 predicate places. [2021-10-15 20:25:24,616 INFO L470 AbstractCegarLoop]: Abstraction has has 208 places, 424 transitions, 3904 flow [2021-10-15 20:25:24,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.0) internal successors, (192), 3 states have internal predecessors, (192), 0 states have call successors, (0), 0 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 20:25:24,617 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:25:24,617 INFO L254 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 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] [2021-10-15 20:25:24,653 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21d5fa25-2913-46c2-9186-09139c9852ca/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-15 20:25:24,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21d5fa25-2913-46c2-9186-09139c9852ca/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-10-15 20:25:24,832 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:25:24,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:25:24,833 INFO L82 PathProgramCache]: Analyzing trace with hash 1688245835, now seen corresponding path program 1 times [2021-10-15 20:25:24,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:25:24,833 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171711464] [2021-10-15 20:25:24,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:25:24,834 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:25:24,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:25:25,248 INFO L134 CoverageAnalysis]: Checked inductivity of 1672 backedges. 1199 proven. 104 refuted. 0 times theorem prover too weak. 369 trivial. 0 not checked. [2021-10-15 20:25:25,248 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:25:25,248 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171711464] [2021-10-15 20:25:25,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171711464] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:25:25,249 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133559524] [2021-10-15 20:25:25,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:25:25,249 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:25:25,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21d5fa25-2913-46c2-9186-09139c9852ca/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:25:25,253 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21d5fa25-2913-46c2-9186-09139c9852ca/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:25:25,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21d5fa25-2913-46c2-9186-09139c9852ca/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-15 20:25:25,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:25:25,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 849 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-15 20:25:25,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:25:27,914 INFO L134 CoverageAnalysis]: Checked inductivity of 1672 backedges. 1226 proven. 0 refuted. 0 times theorem prover too weak. 446 trivial. 0 not checked. [2021-10-15 20:25:27,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133559524] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:25:27,915 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:25:27,915 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-10-15 20:25:27,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380545265] [2021-10-15 20:25:27,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:25:27,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:25:27,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:25:27,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-10-15 20:25:27,921 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 422 [2021-10-15 20:25:27,922 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 424 transitions, 3904 flow. Second operand has 3 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:27,922 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:25:27,922 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 422 [2021-10-15 20:25:27,922 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:25:30,149 INFO L129 PetriNetUnfolder]: 226/4501 cut-off events. [2021-10-15 20:25:30,149 INFO L130 PetriNetUnfolder]: For 4464/4464 co-relation queries the response was YES. [2021-10-15 20:25:30,153 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10351 conditions, 4501 events. 226/4501 cut-off events. For 4464/4464 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 19298 event pairs, 0 based on Foata normal form. 28/4529 useless extension candidates. Maximal degree in co-relation 9918. Up to 3145 conditions per place. [2021-10-15 20:25:30,163 INFO L132 encePairwiseOnDemand]: 401/422 looper letters, 520 selfloop transitions, 48 changer transitions 9/582 dead transitions. [2021-10-15 20:25:30,164 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 582 transitions, 5134 flow [2021-10-15 20:25:30,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:25:30,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:25:30,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 443 transitions. [2021-10-15 20:25:30,167 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3499210110584518 [2021-10-15 20:25:30,167 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 443 transitions. [2021-10-15 20:25:30,168 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 443 transitions. [2021-10-15 20:25:30,168 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:25:30,168 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 443 transitions. [2021-10-15 20:25:30,170 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 147.66666666666666) internal successors, (443), 3 states have internal predecessors, (443), 0 states have call successors, (0), 0 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 20:25:30,173 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 20:25:30,174 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 20:25:30,175 INFO L186 Difference]: Start difference. First operand has 208 places, 424 transitions, 3904 flow. Second operand 3 states and 443 transitions. [2021-10-15 20:25:30,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 582 transitions, 5134 flow [2021-10-15 20:25:30,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 582 transitions, 4976 flow, removed 20 selfloop flow, removed 3 redundant places. [2021-10-15 20:25:30,215 INFO L242 Difference]: Finished difference. Result has 207 places, 398 transitions, 3510 flow [2021-10-15 20:25:30,216 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=3472, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=359, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=3510, PETRI_PLACES=207, PETRI_TRANSITIONS=398} [2021-10-15 20:25:30,216 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, -35 predicate places. [2021-10-15 20:25:30,216 INFO L470 AbstractCegarLoop]: Abstraction has has 207 places, 398 transitions, 3510 flow [2021-10-15 20:25:30,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:30,217 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:25:30,218 INFO L254 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 4, 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, 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 20:25:30,260 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21d5fa25-2913-46c2-9186-09139c9852ca/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-10-15 20:25:30,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21d5fa25-2913-46c2-9186-09139c9852ca/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-10-15 20:25:30,433 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:25:30,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:25:30,433 INFO L82 PathProgramCache]: Analyzing trace with hash 1823211339, now seen corresponding path program 1 times [2021-10-15 20:25:30,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:25:30,433 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615683106] [2021-10-15 20:25:30,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:25:30,434 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:25:30,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:25:30,816 INFO L134 CoverageAnalysis]: Checked inductivity of 1853 backedges. 1329 proven. 155 refuted. 0 times theorem prover too weak. 369 trivial. 0 not checked. [2021-10-15 20:25:30,817 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:25:30,817 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615683106] [2021-10-15 20:25:30,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615683106] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:25:30,817 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058954999] [2021-10-15 20:25:30,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:25:30,818 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:25:30,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21d5fa25-2913-46c2-9186-09139c9852ca/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:25:30,819 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21d5fa25-2913-46c2-9186-09139c9852ca/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:25:30,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21d5fa25-2913-46c2-9186-09139c9852ca/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-15 20:25:31,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:25:31,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 999 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-15 20:25:31,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:25:33,309 INFO L134 CoverageAnalysis]: Checked inductivity of 1853 backedges. 329 proven. 0 refuted. 0 times theorem prover too weak. 1524 trivial. 0 not checked. [2021-10-15 20:25:33,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058954999] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:25:33,310 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:25:33,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-10-15 20:25:33,310 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476400778] [2021-10-15 20:25:33,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:25:33,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:25:33,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:25:33,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-15 20:25:33,313 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 422 [2021-10-15 20:25:33,314 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 398 transitions, 3510 flow. Second operand has 3 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 0 states have call successors, (0), 0 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 20:25:33,314 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:25:33,314 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 422 [2021-10-15 20:25:33,314 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:25:36,044 INFO L129 PetriNetUnfolder]: 232/4863 cut-off events. [2021-10-15 20:25:36,045 INFO L130 PetriNetUnfolder]: For 5108/5108 co-relation queries the response was YES. [2021-10-15 20:25:36,053 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11094 conditions, 4863 events. 232/4863 cut-off events. For 5108/5108 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 22332 event pairs, 0 based on Foata normal form. 57/4920 useless extension candidates. Maximal degree in co-relation 10337. Up to 2986 conditions per place. [2021-10-15 20:25:36,065 INFO L132 encePairwiseOnDemand]: 376/422 looper letters, 495 selfloop transitions, 88 changer transitions 0/588 dead transitions. [2021-10-15 20:25:36,066 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 588 transitions, 5234 flow [2021-10-15 20:25:36,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:25:36,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:25:36,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 467 transitions. [2021-10-15 20:25:36,069 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3688783570300158 [2021-10-15 20:25:36,069 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 467 transitions. [2021-10-15 20:25:36,069 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 467 transitions. [2021-10-15 20:25:36,070 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:25:36,070 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 467 transitions. [2021-10-15 20:25:36,072 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 155.66666666666666) internal successors, (467), 3 states have internal predecessors, (467), 0 states have call successors, (0), 0 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 20:25:36,075 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 20:25:36,076 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 20:25:36,076 INFO L186 Difference]: Start difference. First operand has 207 places, 398 transitions, 3510 flow. Second operand 3 states and 467 transitions. [2021-10-15 20:25:36,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 588 transitions, 5234 flow [2021-10-15 20:25:36,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 588 transitions, 5184 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 20:25:36,123 INFO L242 Difference]: Finished difference. Result has 210 places, 413 transitions, 4144 flow [2021-10-15 20:25:36,124 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=3168, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=4144, PETRI_PLACES=210, PETRI_TRANSITIONS=413} [2021-10-15 20:25:36,124 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, -32 predicate places. [2021-10-15 20:25:36,124 INFO L470 AbstractCegarLoop]: Abstraction has has 210 places, 413 transitions, 4144 flow [2021-10-15 20:25:36,124 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 0 states have call successors, (0), 0 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 20:25:36,125 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:25:36,125 INFO L254 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 4, 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, 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 20:25:36,165 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21d5fa25-2913-46c2-9186-09139c9852ca/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-15 20:25:36,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21d5fa25-2913-46c2-9186-09139c9852ca/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-10-15 20:25:36,341 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:25:36,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:25:36,341 INFO L82 PathProgramCache]: Analyzing trace with hash -1112212444, now seen corresponding path program 1 times [2021-10-15 20:25:36,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:25:36,342 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125326472] [2021-10-15 20:25:36,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:25:36,342 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:25:36,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:25:36,681 INFO L134 CoverageAnalysis]: Checked inductivity of 1948 backedges. 1424 proven. 155 refuted. 0 times theorem prover too weak. 369 trivial. 0 not checked. [2021-10-15 20:25:36,681 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:25:36,682 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125326472] [2021-10-15 20:25:36,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125326472] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:25:36,682 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533693510] [2021-10-15 20:25:36,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:25:36,682 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:25:36,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21d5fa25-2913-46c2-9186-09139c9852ca/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:25:36,683 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21d5fa25-2913-46c2-9186-09139c9852ca/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:25:36,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21d5fa25-2913-46c2-9186-09139c9852ca/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-15 20:25:37,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:25:37,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 1019 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-15 20:25:37,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:25:39,260 INFO L134 CoverageAnalysis]: Checked inductivity of 1948 backedges. 833 proven. 0 refuted. 0 times theorem prover too weak. 1115 trivial. 0 not checked. [2021-10-15 20:25:39,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533693510] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:25:39,261 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:25:39,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-10-15 20:25:39,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746596987] [2021-10-15 20:25:39,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:25:39,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:25:39,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:25:39,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-15 20:25:39,264 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 422 [2021-10-15 20:25:39,265 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 413 transitions, 4144 flow. Second operand has 3 states, 3 states have (on average 117.0) internal successors, (351), 3 states have internal predecessors, (351), 0 states have call successors, (0), 0 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 20:25:39,265 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:25:39,265 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 422 [2021-10-15 20:25:39,265 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:25:41,997 INFO L129 PetriNetUnfolder]: 256/5421 cut-off events. [2021-10-15 20:25:41,997 INFO L130 PetriNetUnfolder]: For 6256/6256 co-relation queries the response was YES. [2021-10-15 20:25:42,003 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12560 conditions, 5421 events. 256/5421 cut-off events. For 6256/6256 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 26505 event pairs, 0 based on Foata normal form. 35/5456 useless extension candidates. Maximal degree in co-relation 11796. Up to 2735 conditions per place. [2021-10-15 20:25:42,015 INFO L132 encePairwiseOnDemand]: 375/422 looper letters, 468 selfloop transitions, 139 changer transitions 0/612 dead transitions. [2021-10-15 20:25:42,015 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 612 transitions, 6020 flow [2021-10-15 20:25:42,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:25:42,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:25:42,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 465 transitions. [2021-10-15 20:25:42,019 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.36729857819905215 [2021-10-15 20:25:42,019 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 465 transitions. [2021-10-15 20:25:42,019 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 465 transitions. [2021-10-15 20:25:42,019 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:25:42,020 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 465 transitions. [2021-10-15 20:25:42,021 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 155.0) internal successors, (465), 3 states have internal predecessors, (465), 0 states have call successors, (0), 0 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 20:25:42,024 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 20:25:42,025 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 20:25:42,025 INFO L186 Difference]: Start difference. First operand has 210 places, 413 transitions, 4144 flow. Second operand 3 states and 465 transitions. [2021-10-15 20:25:42,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 612 transitions, 6020 flow [2021-10-15 20:25:42,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 612 transitions, 5762 flow, removed 36 selfloop flow, removed 2 redundant places. [2021-10-15 20:25:42,064 INFO L242 Difference]: Finished difference. Result has 212 places, 437 transitions, 4852 flow [2021-10-15 20:25:42,065 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=3600, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=394, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=4852, PETRI_PLACES=212, PETRI_TRANSITIONS=437} [2021-10-15 20:25:42,066 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, -30 predicate places. [2021-10-15 20:25:42,066 INFO L470 AbstractCegarLoop]: Abstraction has has 212 places, 437 transitions, 4852 flow [2021-10-15 20:25:42,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 117.0) internal successors, (351), 3 states have internal predecessors, (351), 0 states have call successors, (0), 0 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 20:25:42,066 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:25:42,067 INFO L254 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 4, 4, 4, 4, 4, 4, 4, 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, 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 20:25:42,110 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21d5fa25-2913-46c2-9186-09139c9852ca/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-15 20:25:42,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21d5fa25-2913-46c2-9186-09139c9852ca/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-10-15 20:25:42,281 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:25:42,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:25:42,281 INFO L82 PathProgramCache]: Analyzing trace with hash -264748761, now seen corresponding path program 1 times [2021-10-15 20:25:42,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:25:42,282 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005679677] [2021-10-15 20:25:42,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:25:42,282 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:25:42,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:25:42,603 INFO L134 CoverageAnalysis]: Checked inductivity of 1997 backedges. 1473 proven. 155 refuted. 0 times theorem prover too weak. 369 trivial. 0 not checked. [2021-10-15 20:25:42,603 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:25:42,604 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005679677] [2021-10-15 20:25:42,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005679677] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:25:42,604 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232588453] [2021-10-15 20:25:42,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:25:42,604 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:25:42,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21d5fa25-2913-46c2-9186-09139c9852ca/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:25:42,606 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21d5fa25-2913-46c2-9186-09139c9852ca/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:25:42,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21d5fa25-2913-46c2-9186-09139c9852ca/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-15 20:25:43,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:25:43,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 1031 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-15 20:25:43,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:25:45,679 INFO L134 CoverageAnalysis]: Checked inductivity of 1997 backedges. 1473 proven. 155 refuted. 0 times theorem prover too weak. 369 trivial. 0 not checked. [2021-10-15 20:25:45,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232588453] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:25:45,679 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 20:25:45,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-10-15 20:25:45,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850938468] [2021-10-15 20:25:45,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 20:25:45,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:25:45,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 20:25:45,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-15 20:25:45,684 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 422 [2021-10-15 20:25:45,684 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 437 transitions, 4852 flow. Second operand has 4 states, 4 states have (on average 145.5) internal successors, (582), 4 states have internal predecessors, (582), 0 states have call successors, (0), 0 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 20:25:45,684 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:25:45,684 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 422 [2021-10-15 20:25:45,684 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:25:49,506 INFO L129 PetriNetUnfolder]: 282/6337 cut-off events. [2021-10-15 20:25:49,506 INFO L130 PetriNetUnfolder]: For 8302/8302 co-relation queries the response was YES. [2021-10-15 20:25:49,515 INFO L84 FinitePrefix]: Finished finitePrefix Result has 14770 conditions, 6337 events. 282/6337 cut-off events. For 8302/8302 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 30988 event pairs, 0 based on Foata normal form. 29/6366 useless extension candidates. Maximal degree in co-relation 14000. Up to 2710 conditions per place. [2021-10-15 20:25:49,526 INFO L132 encePairwiseOnDemand]: 385/422 looper letters, 702 selfloop transitions, 106 changer transitions 0/813 dead transitions. [2021-10-15 20:25:49,527 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 813 transitions, 7608 flow [2021-10-15 20:25:49,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 20:25:49,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 20:25:49,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 654 transitions. [2021-10-15 20:25:49,530 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.38744075829383884 [2021-10-15 20:25:49,531 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 654 transitions. [2021-10-15 20:25:49,531 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 654 transitions. [2021-10-15 20:25:49,532 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:25:49,532 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 654 transitions. [2021-10-15 20:25:49,534 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 163.5) internal successors, (654), 4 states have internal predecessors, (654), 0 states have call successors, (0), 0 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 20:25:49,537 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 20:25:49,538 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 20:25:49,539 INFO L186 Difference]: Start difference. First operand has 212 places, 437 transitions, 4852 flow. Second operand 4 states and 654 transitions. [2021-10-15 20:25:49,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 813 transitions, 7608 flow [2021-10-15 20:25:49,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 813 transitions, 7304 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 20:25:49,584 INFO L242 Difference]: Finished difference. Result has 216 places, 461 transitions, 5466 flow [2021-10-15 20:25:49,585 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=4486, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=5466, PETRI_PLACES=216, PETRI_TRANSITIONS=461} [2021-10-15 20:25:49,585 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, -26 predicate places. [2021-10-15 20:25:49,585 INFO L470 AbstractCegarLoop]: Abstraction has has 216 places, 461 transitions, 5466 flow [2021-10-15 20:25:49,586 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 145.5) internal successors, (582), 4 states have internal predecessors, (582), 0 states have call successors, (0), 0 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 20:25:49,586 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:25:49,587 INFO L254 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 5, 4, 4, 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, 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] [2021-10-15 20:25:49,612 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21d5fa25-2913-46c2-9186-09139c9852ca/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-15 20:25:49,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21d5fa25-2913-46c2-9186-09139c9852ca/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:25:49,793 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:25:49,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:25:49,793 INFO L82 PathProgramCache]: Analyzing trace with hash 1279771883, now seen corresponding path program 1 times [2021-10-15 20:25:49,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:25:49,793 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782064824] [2021-10-15 20:25:49,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:25:49,793 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:25:49,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:25:50,143 INFO L134 CoverageAnalysis]: Checked inductivity of 2638 backedges. 1790 proven. 0 refuted. 0 times theorem prover too weak. 848 trivial. 0 not checked. [2021-10-15 20:25:50,143 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:25:50,144 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782064824] [2021-10-15 20:25:50,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782064824] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:25:50,144 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:25:50,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 20:25:50,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822502610] [2021-10-15 20:25:50,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:25:50,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:25:50,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:25:50,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 20:25:50,149 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 422 [2021-10-15 20:25:50,149 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 461 transitions, 5466 flow. Second operand has 3 states, 3 states have (on average 147.33333333333334) internal successors, (442), 3 states have internal predecessors, (442), 0 states have call successors, (0), 0 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 20:25:50,149 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:25:50,149 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 422 [2021-10-15 20:25:50,150 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:25:54,371 INFO L129 PetriNetUnfolder]: 272/6683 cut-off events. [2021-10-15 20:25:54,371 INFO L130 PetriNetUnfolder]: For 9608/9608 co-relation queries the response was YES. [2021-10-15 20:25:54,381 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15478 conditions, 6683 events. 272/6683 cut-off events. For 9608/9608 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 33631 event pairs, 0 based on Foata normal form. 51/6734 useless extension candidates. Maximal degree in co-relation 14708. Up to 5141 conditions per place. [2021-10-15 20:25:54,391 INFO L132 encePairwiseOnDemand]: 381/422 looper letters, 531 selfloop transitions, 90 changer transitions 0/626 dead transitions. [2021-10-15 20:25:54,391 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 626 transitions, 6872 flow [2021-10-15 20:25:54,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:25:54,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:25:54,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 456 transitions. [2021-10-15 20:25:54,395 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.36018957345971564 [2021-10-15 20:25:54,395 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 456 transitions. [2021-10-15 20:25:54,395 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 456 transitions. [2021-10-15 20:25:54,396 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:25:54,396 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 456 transitions. [2021-10-15 20:25:54,397 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 152.0) internal successors, (456), 3 states have internal predecessors, (456), 0 states have call successors, (0), 0 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 20:25:54,400 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 20:25:54,401 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 20:25:54,401 INFO L186 Difference]: Start difference. First operand has 216 places, 461 transitions, 5466 flow. Second operand 3 states and 456 transitions. [2021-10-15 20:25:54,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 626 transitions, 6872 flow [2021-10-15 20:25:54,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 626 transitions, 6800 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 20:25:54,449 INFO L242 Difference]: Finished difference. Result has 219 places, 451 transitions, 5650 flow [2021-10-15 20:25:54,450 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=4656, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=420, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=5650, PETRI_PLACES=219, PETRI_TRANSITIONS=451} [2021-10-15 20:25:54,450 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, -23 predicate places. [2021-10-15 20:25:54,450 INFO L470 AbstractCegarLoop]: Abstraction has has 219 places, 451 transitions, 5650 flow [2021-10-15 20:25:54,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 147.33333333333334) internal successors, (442), 3 states have internal predecessors, (442), 0 states have call successors, (0), 0 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 20:25:54,451 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:25:54,452 INFO L254 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 5, 4, 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, 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] [2021-10-15 20:25:54,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-10-15 20:25:54,452 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:25:54,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:25:54,453 INFO L82 PathProgramCache]: Analyzing trace with hash 1603463533, now seen corresponding path program 1 times [2021-10-15 20:25:54,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:25:54,453 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562749750] [2021-10-15 20:25:54,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:25:54,454 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:25:54,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:25:54,830 INFO L134 CoverageAnalysis]: Checked inductivity of 2674 backedges. 1780 proven. 93 refuted. 0 times theorem prover too weak. 801 trivial. 0 not checked. [2021-10-15 20:25:54,830 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:25:54,831 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562749750] [2021-10-15 20:25:54,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562749750] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:25:54,831 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167807521] [2021-10-15 20:25:54,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:25:54,831 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:25:54,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21d5fa25-2913-46c2-9186-09139c9852ca/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:25:54,833 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21d5fa25-2913-46c2-9186-09139c9852ca/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:25:54,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21d5fa25-2913-46c2-9186-09139c9852ca/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-15 20:25:56,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:25:56,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 1150 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-15 20:25:56,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:25:58,089 INFO L134 CoverageAnalysis]: Checked inductivity of 2674 backedges. 384 proven. 0 refuted. 0 times theorem prover too weak. 2290 trivial. 0 not checked. [2021-10-15 20:25:58,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167807521] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:25:58,090 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:25:58,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-10-15 20:25:58,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910756770] [2021-10-15 20:25:58,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:25:58,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:25:58,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:25:58,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-15 20:25:58,093 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 422 [2021-10-15 20:25:58,094 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 451 transitions, 5650 flow. Second operand has 3 states, 3 states have (on average 84.33333333333333) internal successors, (253), 3 states have internal predecessors, (253), 0 states have call successors, (0), 0 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 20:25:58,094 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:25:58,094 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 422 [2021-10-15 20:25:58,094 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:26:01,759 INFO L129 PetriNetUnfolder]: 252/6663 cut-off events. [2021-10-15 20:26:01,760 INFO L130 PetriNetUnfolder]: For 9897/9897 co-relation queries the response was YES. [2021-10-15 20:26:01,769 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15456 conditions, 6663 events. 252/6663 cut-off events. For 9897/9897 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 33600 event pairs, 0 based on Foata normal form. 20/6683 useless extension candidates. Maximal degree in co-relation 14685. Up to 3474 conditions per place. [2021-10-15 20:26:01,777 INFO L132 encePairwiseOnDemand]: 380/422 looper letters, 467 selfloop transitions, 134 changer transitions 0/606 dead transitions. [2021-10-15 20:26:01,777 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 606 transitions, 6857 flow [2021-10-15 20:26:01,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:26:01,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:26:01,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 452 transitions. [2021-10-15 20:26:01,788 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3570300157977883 [2021-10-15 20:26:01,789 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 452 transitions. [2021-10-15 20:26:01,789 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 452 transitions. [2021-10-15 20:26:01,789 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:26:01,789 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 452 transitions. [2021-10-15 20:26:01,791 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 150.66666666666666) internal successors, (452), 3 states have internal predecessors, (452), 0 states have call successors, (0), 0 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 20:26:01,795 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 20:26:01,796 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 20:26:01,796 INFO L186 Difference]: Start difference. First operand has 219 places, 451 transitions, 5650 flow. Second operand 3 states and 452 transitions. [2021-10-15 20:26:01,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 606 transitions, 6857 flow [2021-10-15 20:26:01,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 606 transitions, 6629 flow, removed 24 selfloop flow, removed 2 redundant places. [2021-10-15 20:26:01,849 INFO L242 Difference]: Finished difference. Result has 219 places, 431 transitions, 5345 flow [2021-10-15 20:26:01,850 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=5077, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=431, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=5345, PETRI_PLACES=219, PETRI_TRANSITIONS=431} [2021-10-15 20:26:01,850 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, -23 predicate places. [2021-10-15 20:26:01,851 INFO L470 AbstractCegarLoop]: Abstraction has has 219 places, 431 transitions, 5345 flow [2021-10-15 20:26:01,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.33333333333333) internal successors, (253), 3 states have internal predecessors, (253), 0 states have call successors, (0), 0 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 20:26:01,851 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:26:01,852 INFO L254 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 5, 5, 4, 4, 4, 4, 4, 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, 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] [2021-10-15 20:26:01,897 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21d5fa25-2913-46c2-9186-09139c9852ca/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-15 20:26:02,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21d5fa25-2913-46c2-9186-09139c9852ca/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-10-15 20:26:02,069 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:26:02,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:26:02,069 INFO L82 PathProgramCache]: Analyzing trace with hash 1365813249, now seen corresponding path program 1 times [2021-10-15 20:26:02,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:26:02,069 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913536726] [2021-10-15 20:26:02,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:26:02,070 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:26:02,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:26:02,436 INFO L134 CoverageAnalysis]: Checked inductivity of 2697 backedges. 1794 proven. 93 refuted. 0 times theorem prover too weak. 810 trivial. 0 not checked. [2021-10-15 20:26:02,436 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:26:02,436 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913536726] [2021-10-15 20:26:02,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913536726] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:26:02,437 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417584757] [2021-10-15 20:26:02,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:26:02,437 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:26:02,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21d5fa25-2913-46c2-9186-09139c9852ca/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:26:02,438 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21d5fa25-2913-46c2-9186-09139c9852ca/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:26:02,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21d5fa25-2913-46c2-9186-09139c9852ca/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-15 20:26:04,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:26:04,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 1156 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-15 20:26:04,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:26:13,136 INFO L134 CoverageAnalysis]: Checked inductivity of 2697 backedges. 1954 proven. 266 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2021-10-15 20:26:13,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417584757] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:26:13,136 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 20:26:13,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2021-10-15 20:26:13,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355566244] [2021-10-15 20:26:13,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-15 20:26:13,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:26:13,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-15 20:26:13,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-10-15 20:26:13,141 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 422 [2021-10-15 20:26:13,142 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 431 transitions, 5345 flow. Second operand has 9 states, 9 states have (on average 105.44444444444444) internal successors, (949), 9 states have internal predecessors, (949), 0 states have call successors, (0), 0 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 20:26:13,142 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:26:13,142 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 422 [2021-10-15 20:26:13,143 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:26:19,466 INFO L129 PetriNetUnfolder]: 227/6710 cut-off events. [2021-10-15 20:26:19,467 INFO L130 PetriNetUnfolder]: For 9532/9532 co-relation queries the response was YES. [2021-10-15 20:26:19,478 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15304 conditions, 6710 events. 227/6710 cut-off events. For 9532/9532 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 31216 event pairs, 0 based on Foata normal form. 25/6735 useless extension candidates. Maximal degree in co-relation 14528. Up to 1961 conditions per place. [2021-10-15 20:26:19,487 INFO L132 encePairwiseOnDemand]: 375/422 looper letters, 1074 selfloop transitions, 153 changer transitions 237/1468 dead transitions. [2021-10-15 20:26:19,487 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 1468 transitions, 9832 flow [2021-10-15 20:26:19,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-15 20:26:19,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-10-15 20:26:19,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1444 transitions. [2021-10-15 20:26:19,495 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.22812006319115324 [2021-10-15 20:26:19,495 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1444 transitions. [2021-10-15 20:26:19,496 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1444 transitions. [2021-10-15 20:26:19,497 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:26:19,498 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1444 transitions. [2021-10-15 20:26:19,503 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 96.26666666666667) internal successors, (1444), 15 states have internal predecessors, (1444), 0 states have call successors, (0), 0 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 20:26:19,518 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 422.0) internal successors, (6752), 16 states have internal predecessors, (6752), 0 states have call successors, (0), 0 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 20:26:19,521 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 422.0) internal successors, (6752), 16 states have internal predecessors, (6752), 0 states have call successors, (0), 0 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 20:26:19,521 INFO L186 Difference]: Start difference. First operand has 219 places, 431 transitions, 5345 flow. Second operand 15 states and 1444 transitions. [2021-10-15 20:26:19,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 1468 transitions, 9832 flow [2021-10-15 20:26:19,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 1468 transitions, 9714 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 20:26:19,588 INFO L242 Difference]: Finished difference. Result has 233 places, 357 transitions, 3851 flow [2021-10-15 20:26:19,589 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=4662, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=3851, PETRI_PLACES=233, PETRI_TRANSITIONS=357} [2021-10-15 20:26:19,589 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, -9 predicate places. [2021-10-15 20:26:19,589 INFO L470 AbstractCegarLoop]: Abstraction has has 233 places, 357 transitions, 3851 flow [2021-10-15 20:26:19,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 105.44444444444444) internal successors, (949), 9 states have internal predecessors, (949), 0 states have call successors, (0), 0 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 20:26:19,590 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:26:19,591 INFO L254 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 7, 7, 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, 4, 4, 4, 4, 4, 4, 4, 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, 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, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:26:19,630 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21d5fa25-2913-46c2-9186-09139c9852ca/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-10-15 20:26:19,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21d5fa25-2913-46c2-9186-09139c9852ca/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-10-15 20:26:19,805 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:26:19,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:26:19,805 INFO L82 PathProgramCache]: Analyzing trace with hash 2022978308, now seen corresponding path program 1 times [2021-10-15 20:26:19,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:26:19,805 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826812494] [2021-10-15 20:26:19,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:26:19,805 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:26:19,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:26:20,246 INFO L134 CoverageAnalysis]: Checked inductivity of 3740 backedges. 1271 proven. 0 refuted. 0 times theorem prover too weak. 2469 trivial. 0 not checked. [2021-10-15 20:26:20,246 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:26:20,247 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826812494] [2021-10-15 20:26:20,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826812494] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:26:20,247 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:26:20,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 20:26:20,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252760009] [2021-10-15 20:26:20,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:26:20,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:26:20,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:26:20,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 20:26:20,252 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 422 [2021-10-15 20:26:20,252 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 357 transitions, 3851 flow. Second operand has 3 states, 3 states have (on average 122.66666666666667) internal successors, (368), 3 states have internal predecessors, (368), 0 states have call successors, (0), 0 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 20:26:20,252 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:26:20,252 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 422 [2021-10-15 20:26:20,253 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:26:23,834 INFO L129 PetriNetUnfolder]: 156/6096 cut-off events. [2021-10-15 20:26:23,834 INFO L130 PetriNetUnfolder]: For 7144/7144 co-relation queries the response was YES. [2021-10-15 20:26:23,845 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13612 conditions, 6096 events. 156/6096 cut-off events. For 7144/7144 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 25616 event pairs, 0 based on Foata normal form. 16/6112 useless extension candidates. Maximal degree in co-relation 12832. Up to 5573 conditions per place. [2021-10-15 20:26:23,853 INFO L132 encePairwiseOnDemand]: 405/422 looper letters, 494 selfloop transitions, 13 changer transitions 0/522 dead transitions. [2021-10-15 20:26:23,853 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 522 transitions, 5021 flow [2021-10-15 20:26:23,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:26:23,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:26:23,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 423 transitions. [2021-10-15 20:26:23,855 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3341232227488152 [2021-10-15 20:26:23,855 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 423 transitions. [2021-10-15 20:26:23,855 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 423 transitions. [2021-10-15 20:26:23,855 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:26:23,856 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 423 transitions. [2021-10-15 20:26:23,857 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 141.0) internal successors, (423), 3 states have internal predecessors, (423), 0 states have call successors, (0), 0 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 20:26:23,859 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 20:26:23,860 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 20:26:23,860 INFO L186 Difference]: Start difference. First operand has 233 places, 357 transitions, 3851 flow. Second operand 3 states and 423 transitions. [2021-10-15 20:26:23,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 522 transitions, 5021 flow [2021-10-15 20:26:23,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 522 transitions, 4857 flow, removed 52 selfloop flow, removed 4 redundant places. [2021-10-15 20:26:23,896 INFO L242 Difference]: Finished difference. Result has 230 places, 347 transitions, 3542 flow [2021-10-15 20:26:23,897 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=3468, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=3542, PETRI_PLACES=230, PETRI_TRANSITIONS=347} [2021-10-15 20:26:23,897 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, -12 predicate places. [2021-10-15 20:26:23,898 INFO L470 AbstractCegarLoop]: Abstraction has has 230 places, 347 transitions, 3542 flow [2021-10-15 20:26:23,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 122.66666666666667) internal successors, (368), 3 states have internal predecessors, (368), 0 states have call successors, (0), 0 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 20:26:23,898 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:26:23,899 INFO L254 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 7, 7, 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, 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, 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, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:26:23,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-10-15 20:26:23,899 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:26:23,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:26:23,900 INFO L82 PathProgramCache]: Analyzing trace with hash 1168039199, now seen corresponding path program 1 times [2021-10-15 20:26:23,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:26:23,900 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906380468] [2021-10-15 20:26:23,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:26:23,901 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:26:24,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:26:24,539 INFO L134 CoverageAnalysis]: Checked inductivity of 3790 backedges. 1321 proven. 0 refuted. 0 times theorem prover too weak. 2469 trivial. 0 not checked. [2021-10-15 20:26:24,540 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:26:24,540 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906380468] [2021-10-15 20:26:24,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906380468] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:26:24,540 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:26:24,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 20:26:24,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927656484] [2021-10-15 20:26:24,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-15 20:26:24,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:26:24,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-15 20:26:24,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-15 20:26:24,545 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 422 [2021-10-15 20:26:24,546 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 347 transitions, 3542 flow. Second operand has 5 states, 5 states have (on average 81.8) internal successors, (409), 5 states have internal predecessors, (409), 0 states have call successors, (0), 0 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 20:26:24,546 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:26:24,546 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 422 [2021-10-15 20:26:24,546 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:26:28,616 INFO L129 PetriNetUnfolder]: 117/6064 cut-off events. [2021-10-15 20:26:28,616 INFO L130 PetriNetUnfolder]: For 5801/5801 co-relation queries the response was YES. [2021-10-15 20:26:28,629 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13137 conditions, 6064 events. 117/6064 cut-off events. For 5801/5801 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 25341 event pairs, 0 based on Foata normal form. 37/6101 useless extension candidates. Maximal degree in co-relation 12361. Up to 3740 conditions per place. [2021-10-15 20:26:28,636 INFO L132 encePairwiseOnDemand]: 393/422 looper letters, 591 selfloop transitions, 33 changer transitions 21/660 dead transitions. [2021-10-15 20:26:28,637 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 660 transitions, 4768 flow [2021-10-15 20:26:28,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-15 20:26:28,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-10-15 20:26:28,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 625 transitions. [2021-10-15 20:26:28,640 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.2962085308056872 [2021-10-15 20:26:28,640 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 625 transitions. [2021-10-15 20:26:28,640 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 625 transitions. [2021-10-15 20:26:28,640 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:26:28,640 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 625 transitions. [2021-10-15 20:26:28,642 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 125.0) internal successors, (625), 5 states have internal predecessors, (625), 0 states have call successors, (0), 0 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 20:26:28,645 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 20:26:28,646 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 20:26:28,646 INFO L186 Difference]: Start difference. First operand has 230 places, 347 transitions, 3542 flow. Second operand 5 states and 625 transitions. [2021-10-15 20:26:28,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 660 transitions, 4768 flow [2021-10-15 20:26:28,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 660 transitions, 4708 flow, removed 24 selfloop flow, removed 1 redundant places. [2021-10-15 20:26:28,672 INFO L242 Difference]: Finished difference. Result has 235 places, 289 transitions, 2427 flow [2021-10-15 20:26:28,673 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=2682, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2427, PETRI_PLACES=235, PETRI_TRANSITIONS=289} [2021-10-15 20:26:28,673 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, -7 predicate places. [2021-10-15 20:26:28,673 INFO L470 AbstractCegarLoop]: Abstraction has has 235 places, 289 transitions, 2427 flow [2021-10-15 20:26:28,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 81.8) internal successors, (409), 5 states have internal predecessors, (409), 0 states have call successors, (0), 0 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 20:26:28,674 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:26:28,675 INFO L254 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 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, 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] [2021-10-15 20:26:28,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-10-15 20:26:28,675 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:26:28,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:26:28,676 INFO L82 PathProgramCache]: Analyzing trace with hash -1857606004, now seen corresponding path program 1 times [2021-10-15 20:26:28,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:26:28,676 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174008944] [2021-10-15 20:26:28,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:26:28,677 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:26:28,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:26:29,159 INFO L134 CoverageAnalysis]: Checked inductivity of 3977 backedges. 2906 proven. 72 refuted. 0 times theorem prover too weak. 999 trivial. 0 not checked. [2021-10-15 20:26:29,159 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:26:29,159 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174008944] [2021-10-15 20:26:29,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174008944] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:26:29,159 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214597011] [2021-10-15 20:26:29,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:26:29,160 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:26:29,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21d5fa25-2913-46c2-9186-09139c9852ca/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:26:29,161 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21d5fa25-2913-46c2-9186-09139c9852ca/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:26:29,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21d5fa25-2913-46c2-9186-09139c9852ca/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-15 20:26:31,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:26:31,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 1390 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-15 20:26:31,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:26:34,110 INFO L134 CoverageAnalysis]: Checked inductivity of 3977 backedges. 2619 proven. 0 refuted. 0 times theorem prover too weak. 1358 trivial. 0 not checked. [2021-10-15 20:26:34,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214597011] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:26:34,110 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:26:34,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2021-10-15 20:26:34,111 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798796924] [2021-10-15 20:26:34,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 20:26:34,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:26:34,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 20:26:34,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-10-15 20:26:34,115 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 422 [2021-10-15 20:26:34,116 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 289 transitions, 2427 flow. Second operand has 4 states, 4 states have (on average 153.25) internal successors, (613), 4 states have internal predecessors, (613), 0 states have call successors, (0), 0 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 20:26:34,116 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:26:34,116 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 422 [2021-10-15 20:26:34,116 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:26:37,649 INFO L129 PetriNetUnfolder]: 101/6041 cut-off events. [2021-10-15 20:26:37,649 INFO L130 PetriNetUnfolder]: For 4579/4579 co-relation queries the response was YES. [2021-10-15 20:26:37,659 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13011 conditions, 6041 events. 101/6041 cut-off events. For 4579/4579 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 25553 event pairs, 0 based on Foata normal form. 10/6051 useless extension candidates. Maximal degree in co-relation 12230. Up to 3381 conditions per place. [2021-10-15 20:26:37,667 INFO L132 encePairwiseOnDemand]: 401/422 looper letters, 602 selfloop transitions, 26 changer transitions 0/643 dead transitions. [2021-10-15 20:26:37,667 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 643 transitions, 4475 flow [2021-10-15 20:26:37,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 20:26:37,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 20:26:37,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 617 transitions. [2021-10-15 20:26:37,670 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.365521327014218 [2021-10-15 20:26:37,670 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 617 transitions. [2021-10-15 20:26:37,670 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 617 transitions. [2021-10-15 20:26:37,671 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:26:37,671 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 617 transitions. [2021-10-15 20:26:37,673 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 154.25) internal successors, (617), 4 states have internal predecessors, (617), 0 states have call successors, (0), 0 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 20:26:37,675 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 20:26:37,675 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 20:26:37,675 INFO L186 Difference]: Start difference. First operand has 235 places, 289 transitions, 2427 flow. Second operand 4 states and 617 transitions. [2021-10-15 20:26:37,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 643 transitions, 4475 flow [2021-10-15 20:26:37,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 643 transitions, 4440 flow, removed 15 selfloop flow, removed 2 redundant places. [2021-10-15 20:26:37,695 INFO L242 Difference]: Finished difference. Result has 237 places, 293 transitions, 2576 flow [2021-10-15 20:26:37,695 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=2396, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2576, PETRI_PLACES=237, PETRI_TRANSITIONS=293} [2021-10-15 20:26:37,696 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, -5 predicate places. [2021-10-15 20:26:37,696 INFO L470 AbstractCegarLoop]: Abstraction has has 237 places, 293 transitions, 2576 flow [2021-10-15 20:26:37,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 153.25) internal successors, (613), 4 states have internal predecessors, (613), 0 states have call successors, (0), 0 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 20:26:37,697 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:26:37,697 INFO L254 CegarLoopForPetriNet]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 6, 6, 6, 6, 6, 6, 6, 5, 5, 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, 3, 3, 3, 3, 3, 3, 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] [2021-10-15 20:26:37,759 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21d5fa25-2913-46c2-9186-09139c9852ca/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-10-15 20:26:37,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21d5fa25-2913-46c2-9186-09139c9852ca/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:26:37,925 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:26:37,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:26:37,925 INFO L82 PathProgramCache]: Analyzing trace with hash 1652168696, now seen corresponding path program 1 times [2021-10-15 20:26:37,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:26:37,925 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975878939] [2021-10-15 20:26:37,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:26:37,925 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:26:38,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:26:38,295 INFO L134 CoverageAnalysis]: Checked inductivity of 3676 backedges. 2336 proven. 0 refuted. 0 times theorem prover too weak. 1340 trivial. 0 not checked. [2021-10-15 20:26:38,295 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:26:38,296 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975878939] [2021-10-15 20:26:38,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975878939] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:26:38,296 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:26:38,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 20:26:38,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167283387] [2021-10-15 20:26:38,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:26:38,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:26:38,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:26:38,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 20:26:38,299 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 422 [2021-10-15 20:26:38,300 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 293 transitions, 2576 flow. Second operand has 3 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 0 states have call successors, (0), 0 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 20:26:38,300 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:26:38,300 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 422 [2021-10-15 20:26:38,300 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:26:42,116 INFO L129 PetriNetUnfolder]: 93/5855 cut-off events. [2021-10-15 20:26:42,116 INFO L130 PetriNetUnfolder]: For 4344/4344 co-relation queries the response was YES. [2021-10-15 20:26:42,128 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12568 conditions, 5855 events. 93/5855 cut-off events. For 4344/4344 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 17303 event pairs, 0 based on Foata normal form. 7/5862 useless extension candidates. Maximal degree in co-relation 11798. Up to 4807 conditions per place. [2021-10-15 20:26:42,135 INFO L132 encePairwiseOnDemand]: 404/422 looper letters, 427 selfloop transitions, 11 changer transitions 7/460 dead transitions. [2021-10-15 20:26:42,136 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 460 transitions, 3650 flow [2021-10-15 20:26:42,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:26:42,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:26:42,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 422 transitions. [2021-10-15 20:26:42,139 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3333333333333333 [2021-10-15 20:26:42,139 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 422 transitions. [2021-10-15 20:26:42,139 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 422 transitions. [2021-10-15 20:26:42,139 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:26:42,140 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 422 transitions. [2021-10-15 20:26:42,141 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 140.66666666666666) internal successors, (422), 3 states have internal predecessors, (422), 0 states have call successors, (0), 0 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 20:26:42,144 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 20:26:42,144 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 20:26:42,145 INFO L186 Difference]: Start difference. First operand has 237 places, 293 transitions, 2576 flow. Second operand 3 states and 422 transitions. [2021-10-15 20:26:42,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 460 transitions, 3650 flow [2021-10-15 20:26:42,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 460 transitions, 3606 flow, removed 19 selfloop flow, removed 2 redundant places. [2021-10-15 20:26:42,172 INFO L242 Difference]: Finished difference. Result has 237 places, 278 transitions, 2228 flow [2021-10-15 20:26:42,173 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=2364, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2228, PETRI_PLACES=237, PETRI_TRANSITIONS=278} [2021-10-15 20:26:42,173 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, -5 predicate places. [2021-10-15 20:26:42,174 INFO L470 AbstractCegarLoop]: Abstraction has has 237 places, 278 transitions, 2228 flow [2021-10-15 20:26:42,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 0 states have call successors, (0), 0 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 20:26:42,174 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:26:42,175 INFO L254 CegarLoopForPetriNet]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 9, 9, 9, 8, 8, 8, 8, 7, 6, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:26:42,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-10-15 20:26:42,176 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:26:42,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:26:42,176 INFO L82 PathProgramCache]: Analyzing trace with hash -1570608280, now seen corresponding path program 1 times [2021-10-15 20:26:42,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:26:42,177 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037269815] [2021-10-15 20:26:42,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:26:42,177 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:26:42,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:26:43,187 INFO L134 CoverageAnalysis]: Checked inductivity of 8760 backedges. 4557 proven. 588 refuted. 0 times theorem prover too weak. 3615 trivial. 0 not checked. [2021-10-15 20:26:43,188 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:26:43,188 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037269815] [2021-10-15 20:26:43,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037269815] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:26:43,188 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739651939] [2021-10-15 20:26:43,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:26:43,189 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:26:43,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21d5fa25-2913-46c2-9186-09139c9852ca/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:26:43,193 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21d5fa25-2913-46c2-9186-09139c9852ca/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:26:43,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21d5fa25-2913-46c2-9186-09139c9852ca/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-15 20:26:46,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:26:46,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 2017 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-15 20:26:46,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:26:51,262 INFO L134 CoverageAnalysis]: Checked inductivity of 8760 backedges. 3686 proven. 498 refuted. 0 times theorem prover too weak. 4576 trivial. 0 not checked. [2021-10-15 20:26:51,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739651939] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:26:51,263 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 20:26:51,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-10-15 20:26:51,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380731132] [2021-10-15 20:26:51,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-15 20:26:51,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:26:51,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-15 20:26:51,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-10-15 20:26:51,269 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 422 [2021-10-15 20:26:51,270 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 278 transitions, 2228 flow. Second operand has 11 states, 11 states have (on average 118.54545454545455) internal successors, (1304), 11 states have internal predecessors, (1304), 0 states have call successors, (0), 0 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 20:26:51,270 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:26:51,270 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 422 [2021-10-15 20:26:51,270 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:27:00,447 INFO L129 PetriNetUnfolder]: 99/7139 cut-off events. [2021-10-15 20:27:00,447 INFO L130 PetriNetUnfolder]: For 4714/4714 co-relation queries the response was YES. [2021-10-15 20:27:00,457 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15171 conditions, 7139 events. 99/7139 cut-off events. For 4714/4714 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 22063 event pairs, 0 based on Foata normal form. 12/7151 useless extension candidates. Maximal degree in co-relation 13879. Up to 2857 conditions per place. [2021-10-15 20:27:00,468 INFO L132 encePairwiseOnDemand]: 399/422 looper letters, 1977 selfloop transitions, 50 changer transitions 14/2056 dead transitions. [2021-10-15 20:27:00,468 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 2056 transitions, 10161 flow [2021-10-15 20:27:00,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-15 20:27:00,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-10-15 20:27:00,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2120 transitions. [2021-10-15 20:27:00,476 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.38643820634341963 [2021-10-15 20:27:00,476 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2120 transitions. [2021-10-15 20:27:00,476 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2120 transitions. [2021-10-15 20:27:00,478 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:27:00,478 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2120 transitions. [2021-10-15 20:27:00,483 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 163.07692307692307) internal successors, (2120), 13 states have internal predecessors, (2120), 0 states have call successors, (0), 0 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 20:27:00,492 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 422.0) internal successors, (5908), 14 states have internal predecessors, (5908), 0 states have call successors, (0), 0 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 20:27:00,494 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 422.0) internal successors, (5908), 14 states have internal predecessors, (5908), 0 states have call successors, (0), 0 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 20:27:00,494 INFO L186 Difference]: Start difference. First operand has 237 places, 278 transitions, 2228 flow. Second operand 13 states and 2120 transitions. [2021-10-15 20:27:00,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 2056 transitions, 10161 flow [2021-10-15 20:27:00,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 2056 transitions, 9961 flow, removed 39 selfloop flow, removed 3 redundant places. [2021-10-15 20:27:00,543 INFO L242 Difference]: Finished difference. Result has 252 places, 289 transitions, 2454 flow [2021-10-15 20:27:00,544 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=1990, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2454, PETRI_PLACES=252, PETRI_TRANSITIONS=289} [2021-10-15 20:27:00,544 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, 10 predicate places. [2021-10-15 20:27:00,544 INFO L470 AbstractCegarLoop]: Abstraction has has 252 places, 289 transitions, 2454 flow [2021-10-15 20:27:00,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 118.54545454545455) internal successors, (1304), 11 states have internal predecessors, (1304), 0 states have call successors, (0), 0 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 20:27:00,545 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:27:00,546 INFO L254 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 10, 9, 9, 9, 9, 9, 9, 8, 7, 6, 6, 6, 6, 6, 6, 6, 6, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:27:00,595 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21d5fa25-2913-46c2-9186-09139c9852ca/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-15 20:27:00,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21d5fa25-2913-46c2-9186-09139c9852ca/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-10-15 20:27:00,773 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:27:00,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:27:00,773 INFO L82 PathProgramCache]: Analyzing trace with hash 118949285, now seen corresponding path program 1 times [2021-10-15 20:27:00,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:27:00,774 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495324947] [2021-10-15 20:27:00,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:27:00,774 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:27:00,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:27:02,036 INFO L134 CoverageAnalysis]: Checked inductivity of 10389 backedges. 3542 proven. 1045 refuted. 0 times theorem prover too weak. 5802 trivial. 0 not checked. [2021-10-15 20:27:02,036 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:27:02,036 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495324947] [2021-10-15 20:27:02,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495324947] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:27:02,037 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519299443] [2021-10-15 20:27:02,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:27:02,037 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:27:02,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21d5fa25-2913-46c2-9186-09139c9852ca/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:27:02,038 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21d5fa25-2913-46c2-9186-09139c9852ca/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:27:02,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21d5fa25-2913-46c2-9186-09139c9852ca/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-15 20:27:05,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:27:05,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 2217 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-15 20:27:05,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:27:09,342 INFO L134 CoverageAnalysis]: Checked inductivity of 10389 backedges. 4587 proven. 0 refuted. 0 times theorem prover too weak. 5802 trivial. 0 not checked. [2021-10-15 20:27:09,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519299443] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:27:09,343 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:27:09,344 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-10-15 20:27:09,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630532997] [2021-10-15 20:27:09,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:27:09,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:27:09,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:27:09,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-15 20:27:09,349 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 422 [2021-10-15 20:27:09,350 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 289 transitions, 2454 flow. Second operand has 3 states, 3 states have (on average 168.0) internal successors, (504), 3 states have internal predecessors, (504), 0 states have call successors, (0), 0 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 20:27:09,350 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:27:09,350 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 422 [2021-10-15 20:27:09,350 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:27:14,138 INFO L129 PetriNetUnfolder]: 77/6744 cut-off events. [2021-10-15 20:27:14,139 INFO L130 PetriNetUnfolder]: For 4185/4185 co-relation queries the response was YES. [2021-10-15 20:27:14,155 INFO L84 FinitePrefix]: Finished finitePrefix Result has 14190 conditions, 6744 events. 77/6744 cut-off events. For 4185/4185 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 15924 event pairs, 0 based on Foata normal form. 20/6764 useless extension candidates. Maximal degree in co-relation 13780. Up to 4608 conditions per place. [2021-10-15 20:27:14,162 INFO L132 encePairwiseOnDemand]: 404/422 looper letters, 407 selfloop transitions, 5 changer transitions 17/442 dead transitions. [2021-10-15 20:27:14,162 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 442 transitions, 3202 flow [2021-10-15 20:27:14,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:27:14,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:27:14,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 417 transitions. [2021-10-15 20:27:14,164 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3293838862559242 [2021-10-15 20:27:14,164 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 417 transitions. [2021-10-15 20:27:14,164 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 417 transitions. [2021-10-15 20:27:14,165 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:27:14,165 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 417 transitions. [2021-10-15 20:27:14,166 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 139.0) internal successors, (417), 3 states have internal predecessors, (417), 0 states have call successors, (0), 0 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 20:27:14,168 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 20:27:14,169 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 20:27:14,169 INFO L186 Difference]: Start difference. First operand has 252 places, 289 transitions, 2454 flow. Second operand 3 states and 417 transitions. [2021-10-15 20:27:14,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 442 transitions, 3202 flow [2021-10-15 20:27:14,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 442 transitions, 3044 flow, removed 24 selfloop flow, removed 9 redundant places. [2021-10-15 20:27:14,194 INFO L242 Difference]: Finished difference. Result has 244 places, 250 transitions, 1550 flow [2021-10-15 20:27:14,195 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=1838, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1550, PETRI_PLACES=244, PETRI_TRANSITIONS=250} [2021-10-15 20:27:14,195 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, 2 predicate places. [2021-10-15 20:27:14,196 INFO L470 AbstractCegarLoop]: Abstraction has has 244 places, 250 transitions, 1550 flow [2021-10-15 20:27:14,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 168.0) internal successors, (504), 3 states have internal predecessors, (504), 0 states have call successors, (0), 0 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 20:27:14,196 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:27:14,197 INFO L254 CegarLoopForPetriNet]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 11, 11, 11, 10, 10, 10, 10, 9, 8, 7, 7, 7, 7, 7, 7, 6, 6, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:27:14,249 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21d5fa25-2913-46c2-9186-09139c9852ca/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-15 20:27:14,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21d5fa25-2913-46c2-9186-09139c9852ca/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-10-15 20:27:14,413 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:27:14,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:27:14,413 INFO L82 PathProgramCache]: Analyzing trace with hash -325120608, now seen corresponding path program 1 times [2021-10-15 20:27:14,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:27:14,414 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086265770] [2021-10-15 20:27:14,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:27:14,414 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:27:14,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:27:15,437 INFO L134 CoverageAnalysis]: Checked inductivity of 11999 backedges. 7122 proven. 404 refuted. 0 times theorem prover too weak. 4473 trivial. 0 not checked. [2021-10-15 20:27:15,437 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:27:15,437 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086265770] [2021-10-15 20:27:15,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086265770] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:27:15,438 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154588091] [2021-10-15 20:27:15,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:27:15,438 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:27:15,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21d5fa25-2913-46c2-9186-09139c9852ca/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:27:15,441 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21d5fa25-2913-46c2-9186-09139c9852ca/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:27:15,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21d5fa25-2913-46c2-9186-09139c9852ca/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-15 20:27:19,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:27:19,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 2357 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-15 20:27:19,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:27:23,404 INFO L134 CoverageAnalysis]: Checked inductivity of 11999 backedges. 2324 proven. 0 refuted. 0 times theorem prover too weak. 9675 trivial. 0 not checked. [2021-10-15 20:27:23,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154588091] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:27:23,404 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:27:23,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-10-15 20:27:23,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975333442] [2021-10-15 20:27:23,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:27:23,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:27:23,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:27:23,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-15 20:27:23,409 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 422 [2021-10-15 20:27:23,409 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 250 transitions, 1550 flow. Second operand has 3 states, 3 states have (on average 125.66666666666667) internal successors, (377), 3 states have internal predecessors, (377), 0 states have call successors, (0), 0 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 20:27:23,410 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:27:23,410 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 422 [2021-10-15 20:27:23,410 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:27:27,059 INFO L129 PetriNetUnfolder]: 59/5097 cut-off events. [2021-10-15 20:27:27,059 INFO L130 PetriNetUnfolder]: For 2163/2163 co-relation queries the response was YES. [2021-10-15 20:27:27,072 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10651 conditions, 5097 events. 59/5097 cut-off events. For 2163/2163 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 8049 event pairs, 0 based on Foata normal form. 2/5099 useless extension candidates. Maximal degree in co-relation 10618. Up to 4783 conditions per place. [2021-10-15 20:27:27,080 INFO L132 encePairwiseOnDemand]: 416/422 looper letters, 404 selfloop transitions, 6 changer transitions 0/423 dead transitions. [2021-10-15 20:27:27,080 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 423 transitions, 2683 flow [2021-10-15 20:27:27,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:27:27,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:27:27,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 404 transitions. [2021-10-15 20:27:27,083 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.31911532385466035 [2021-10-15 20:27:27,083 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 404 transitions. [2021-10-15 20:27:27,083 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 404 transitions. [2021-10-15 20:27:27,084 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:27:27,084 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 404 transitions. [2021-10-15 20:27:27,085 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 134.66666666666666) internal successors, (404), 3 states have internal predecessors, (404), 0 states have call successors, (0), 0 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 20:27:27,088 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 20:27:27,088 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 20:27:27,089 INFO L186 Difference]: Start difference. First operand has 244 places, 250 transitions, 1550 flow. Second operand 3 states and 404 transitions. [2021-10-15 20:27:27,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 423 transitions, 2683 flow [2021-10-15 20:27:27,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 423 transitions, 2627 flow, removed 17 selfloop flow, removed 4 redundant places. [2021-10-15 20:27:27,112 INFO L242 Difference]: Finished difference. Result has 238 places, 248 transitions, 1467 flow [2021-10-15 20:27:27,113 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=1455, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1467, PETRI_PLACES=238, PETRI_TRANSITIONS=248} [2021-10-15 20:27:27,113 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, -4 predicate places. [2021-10-15 20:27:27,114 INFO L470 AbstractCegarLoop]: Abstraction has has 238 places, 248 transitions, 1467 flow [2021-10-15 20:27:27,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 125.66666666666667) internal successors, (377), 3 states have internal predecessors, (377), 0 states have call successors, (0), 0 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 20:27:27,114 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:27:27,115 INFO L254 CegarLoopForPetriNet]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 12, 12, 12, 11, 11, 11, 11, 10, 9, 8, 8, 8, 8, 8, 8, 7, 7, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:27:27,159 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21d5fa25-2913-46c2-9186-09139c9852ca/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-15 20:27:27,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21d5fa25-2913-46c2-9186-09139c9852ca/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:27:27,329 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:27:27,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:27:27,329 INFO L82 PathProgramCache]: Analyzing trace with hash -634425027, now seen corresponding path program 1 times [2021-10-15 20:27:27,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:27:27,330 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352529049] [2021-10-15 20:27:27,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:27:27,330 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:27:27,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:27:28,367 INFO L134 CoverageAnalysis]: Checked inductivity of 14973 backedges. 10501 proven. 103 refuted. 0 times theorem prover too weak. 4369 trivial. 0 not checked. [2021-10-15 20:27:28,368 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:27:28,368 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352529049] [2021-10-15 20:27:28,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352529049] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:27:28,368 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609705460] [2021-10-15 20:27:28,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:27:28,369 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:27:28,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21d5fa25-2913-46c2-9186-09139c9852ca/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:27:28,370 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21d5fa25-2913-46c2-9186-09139c9852ca/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:27:28,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21d5fa25-2913-46c2-9186-09139c9852ca/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-15 20:27:32,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:27:32,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 2603 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-15 20:27:32,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:27:37,713 INFO L134 CoverageAnalysis]: Checked inductivity of 14973 backedges. 9751 proven. 0 refuted. 0 times theorem prover too weak. 5222 trivial. 0 not checked. [2021-10-15 20:27:37,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609705460] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:27:37,713 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:27:37,714 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-10-15 20:27:37,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144952909] [2021-10-15 20:27:37,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:27:37,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:27:37,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:27:37,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-10-15 20:27:37,718 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 422 [2021-10-15 20:27:37,718 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 248 transitions, 1467 flow. Second operand has 3 states, 3 states have (on average 169.0) internal successors, (507), 3 states have internal predecessors, (507), 0 states have call successors, (0), 0 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 20:27:37,718 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:27:37,718 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 422 [2021-10-15 20:27:37,719 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:27:39,739 INFO L129 PetriNetUnfolder]: 36/3808 cut-off events. [2021-10-15 20:27:39,739 INFO L130 PetriNetUnfolder]: For 1142/1142 co-relation queries the response was YES. [2021-10-15 20:27:39,749 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7867 conditions, 3808 events. 36/3808 cut-off events. For 1142/1142 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 4355 event pairs, 0 based on Foata normal form. 6/3814 useless extension candidates. Maximal degree in co-relation 7845. Up to 1943 conditions per place. [2021-10-15 20:27:39,752 INFO L132 encePairwiseOnDemand]: 415/422 looper letters, 0 selfloop transitions, 0 changer transitions 396/396 dead transitions. [2021-10-15 20:27:39,752 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 396 transitions, 2115 flow [2021-10-15 20:27:39,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:27:39,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:27:39,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 404 transitions. [2021-10-15 20:27:39,757 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.31911532385466035 [2021-10-15 20:27:39,758 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 404 transitions. [2021-10-15 20:27:39,758 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 404 transitions. [2021-10-15 20:27:39,758 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:27:39,758 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 404 transitions. [2021-10-15 20:27:39,759 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 134.66666666666666) internal successors, (404), 3 states have internal predecessors, (404), 0 states have call successors, (0), 0 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 20:27:39,762 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 20:27:39,762 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 20:27:39,763 INFO L186 Difference]: Start difference. First operand has 238 places, 248 transitions, 1467 flow. Second operand 3 states and 404 transitions. [2021-10-15 20:27:39,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 396 transitions, 2115 flow [2021-10-15 20:27:39,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 396 transitions, 2009 flow, removed 19 selfloop flow, removed 11 redundant places. [2021-10-15 20:27:39,775 INFO L242 Difference]: Finished difference. Result has 223 places, 0 transitions, 0 flow [2021-10-15 20:27:39,775 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=885, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=223, PETRI_TRANSITIONS=0} [2021-10-15 20:27:39,775 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, -19 predicate places. [2021-10-15 20:27:39,776 INFO L470 AbstractCegarLoop]: Abstraction has has 223 places, 0 transitions, 0 flow [2021-10-15 20:27:39,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 169.0) internal successors, (507), 3 states have internal predecessors, (507), 0 states have call successors, (0), 0 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 20:27:39,779 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 20:27:39,818 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21d5fa25-2913-46c2-9186-09139c9852ca/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-10-15 20:27:39,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21d5fa25-2913-46c2-9186-09139c9852ca/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:27:39,994 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-15 20:27:39,999 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 08:27:39 BoogieIcfgContainer [2021-10-15 20:27:40,000 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-15 20:27:40,000 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-15 20:27:40,000 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-15 20:27:40,001 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-15 20:27:40,001 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 08:24:57" (3/4) ... [2021-10-15 20:27:40,006 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-15 20:27:40,062 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2021-10-15 20:27:40,064 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-15 20:27:40,066 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 20:27:40,068 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 20:27:40,242 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21d5fa25-2913-46c2-9186-09139c9852ca/bin/uautomizer-hJ6jxDFKc3/witness.graphml [2021-10-15 20:27:40,242 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-15 20:27:40,244 INFO L168 Benchmark]: Toolchain (without parser) took 165527.81 ms. Allocated memory was 134.2 MB in the beginning and 2.2 GB in the end (delta: 2.1 GB). Free memory was 106.5 MB in the beginning and 1.3 GB in the end (delta: -1.2 GB). Peak memory consumption was 888.1 MB. Max. memory is 16.1 GB. [2021-10-15 20:27:40,244 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 90.2 MB. Free memory is still 59.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 20:27:40,245 INFO L168 Benchmark]: CACSL2BoogieTranslator took 714.53 ms. Allocated memory is still 134.2 MB. Free memory was 106.5 MB in the beginning and 73.7 MB in the end (delta: 32.7 MB). Peak memory consumption was 31.5 MB. Max. memory is 16.1 GB. [2021-10-15 20:27:40,246 INFO L168 Benchmark]: Boogie Procedure Inliner took 104.59 ms. Allocated memory is still 134.2 MB. Free memory was 73.2 MB in the beginning and 63.8 MB in the end (delta: 9.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-15 20:27:40,246 INFO L168 Benchmark]: Boogie Preprocessor took 96.52 ms. Allocated memory is still 134.2 MB. Free memory was 63.8 MB in the beginning and 58.0 MB in the end (delta: 5.8 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-15 20:27:40,247 INFO L168 Benchmark]: RCFGBuilder took 1643.74 ms. Allocated memory is still 134.2 MB. Free memory was 58.0 MB in the beginning and 98.0 MB in the end (delta: -40.0 MB). Peak memory consumption was 44.3 MB. Max. memory is 16.1 GB. [2021-10-15 20:27:40,247 INFO L168 Benchmark]: TraceAbstraction took 162719.20 ms. Allocated memory was 134.2 MB in the beginning and 2.2 GB in the end (delta: 2.1 GB). Free memory was 97.3 MB in the beginning and 1.3 GB in the end (delta: -1.2 GB). Peak memory consumption was 858.5 MB. Max. memory is 16.1 GB. [2021-10-15 20:27:40,247 INFO L168 Benchmark]: Witness Printer took 241.74 ms. Allocated memory is still 2.2 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 18.5 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. [2021-10-15 20:27:40,255 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 90.2 MB. Free memory is still 59.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 714.53 ms. Allocated memory is still 134.2 MB. Free memory was 106.5 MB in the beginning and 73.7 MB in the end (delta: 32.7 MB). Peak memory consumption was 31.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 104.59 ms. Allocated memory is still 134.2 MB. Free memory was 73.2 MB in the beginning and 63.8 MB in the end (delta: 9.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 96.52 ms. Allocated memory is still 134.2 MB. Free memory was 63.8 MB in the beginning and 58.0 MB in the end (delta: 5.8 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1643.74 ms. Allocated memory is still 134.2 MB. Free memory was 58.0 MB in the beginning and 98.0 MB in the end (delta: -40.0 MB). Peak memory consumption was 44.3 MB. Max. memory is 16.1 GB. * TraceAbstraction took 162719.20 ms. Allocated memory was 134.2 MB in the beginning and 2.2 GB in the end (delta: 2.1 GB). Free memory was 97.3 MB in the beginning and 1.3 GB in the end (delta: -1.2 GB). Peak memory consumption was 858.5 MB. Max. memory is 16.1 GB. * Witness Printer took 241.74 ms. Allocated memory is still 2.2 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 18.5 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: 185]: 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: 32.4ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 162640.1ms, OverallIterations: 26, TraceHistogramMax: 18, EmptinessCheckTime: 0.0ms, AutomataDifference: 82082.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 152.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 3109 SDtfs, 3761 SDslu, 13 SDs, 0 SdLazy, 23033 SolverSat, 1236 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 16518.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 14770 GetRequests, 14672 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 623.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=5650occurred in iteration=16, InterpolantAutomatonStates: 107, 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: 1159.2ms SsaConstructionTime, 4242.5ms SatisfiabilityAnalysisTime, 49124.7ms InterpolantComputationTime, 35872 NumberOfCodeBlocks, 35872 NumberOfCodeBlocksAsserted, 40 NumberOfCheckSat, 35832 ConstructedInterpolants, 55 QuantifiedInterpolants, 111461 SizeOfPredicates, 1 NumberOfNonLiveVariables, 18211 ConjunctsInSsa, 46 ConjunctsInUnsatCore, 40 InterpolantComputations, 23 PerfectInterpolantSequences, 142517/146588 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 20:27:40,298 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21d5fa25-2913-46c2-9186-09139c9852ca/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...