./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/test-context1.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f67434aa-aea8-4730-b5a2-13ce5f56a52e/bin/uautomizer-QkZJyEgLgS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f67434aa-aea8-4730-b5a2-13ce5f56a52e/bin/uautomizer-QkZJyEgLgS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f67434aa-aea8-4730-b5a2-13ce5f56a52e/bin/uautomizer-QkZJyEgLgS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f67434aa-aea8-4730-b5a2-13ce5f56a52e/bin/uautomizer-QkZJyEgLgS/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/test-context1.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f67434aa-aea8-4730-b5a2-13ce5f56a52e/bin/uautomizer-QkZJyEgLgS/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f67434aa-aea8-4730-b5a2-13ce5f56a52e/bin/uautomizer-QkZJyEgLgS --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 a6c10414fe2617d00008bf9d366bc6ac1618cf93ea0f6ae08bc6c5a126364bce --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-4e7fbc6 [2022-11-23 02:56:15,389 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 02:56:15,391 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 02:56:15,418 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 02:56:15,419 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 02:56:15,420 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 02:56:15,421 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 02:56:15,431 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 02:56:15,434 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 02:56:15,442 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 02:56:15,443 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 02:56:15,446 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 02:56:15,446 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 02:56:15,449 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 02:56:15,450 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 02:56:15,451 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 02:56:15,452 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 02:56:15,452 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 02:56:15,454 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 02:56:15,456 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 02:56:15,461 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 02:56:15,464 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 02:56:15,468 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 02:56:15,469 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 02:56:15,480 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 02:56:15,480 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 02:56:15,480 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 02:56:15,481 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 02:56:15,482 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 02:56:15,483 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 02:56:15,483 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 02:56:15,484 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 02:56:15,485 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 02:56:15,485 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 02:56:15,487 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 02:56:15,487 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 02:56:15,488 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 02:56:15,488 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 02:56:15,488 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 02:56:15,494 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 02:56:15,496 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 02:56:15,497 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f67434aa-aea8-4730-b5a2-13ce5f56a52e/bin/uautomizer-QkZJyEgLgS/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-23 02:56:15,544 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 02:56:15,545 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 02:56:15,545 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 02:56:15,548 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 02:56:15,549 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 02:56:15,549 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 02:56:15,550 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-23 02:56:15,550 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-23 02:56:15,550 INFO L138 SettingsManager]: * Use SBE=true [2022-11-23 02:56:15,550 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 02:56:15,552 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 02:56:15,552 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 02:56:15,552 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 02:56:15,552 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 02:56:15,552 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 02:56:15,553 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 02:56:15,553 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 02:56:15,553 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 02:56:15,553 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 02:56:15,553 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 02:56:15,554 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 02:56:15,554 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 02:56:15,554 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-23 02:56:15,555 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 02:56:15,555 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 02:56:15,555 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 02:56:15,555 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 02:56:15,556 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 02:56:15,556 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-23 02:56:15,556 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 02:56:15,557 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-23 02:56:15,557 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 02:56:15,557 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-23 02:56:15,557 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-23 02:56:15,558 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_f67434aa-aea8-4730-b5a2-13ce5f56a52e/bin/uautomizer-QkZJyEgLgS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f67434aa-aea8-4730-b5a2-13ce5f56a52e/bin/uautomizer-QkZJyEgLgS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a6c10414fe2617d00008bf9d366bc6ac1618cf93ea0f6ae08bc6c5a126364bce [2022-11-23 02:56:15,908 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 02:56:15,931 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 02:56:15,934 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 02:56:15,936 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 02:56:15,936 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 02:56:15,938 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f67434aa-aea8-4730-b5a2-13ce5f56a52e/bin/uautomizer-QkZJyEgLgS/../../sv-benchmarks/c/weaver/test-context1.wvr.c [2022-11-23 02:56:19,132 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 02:56:19,415 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 02:56:19,416 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f67434aa-aea8-4730-b5a2-13ce5f56a52e/sv-benchmarks/c/weaver/test-context1.wvr.c [2022-11-23 02:56:19,427 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f67434aa-aea8-4730-b5a2-13ce5f56a52e/bin/uautomizer-QkZJyEgLgS/data/24913d33f/b962a6e53f574f0db1c80a33489f4e57/FLAG36b36b945 [2022-11-23 02:56:19,452 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f67434aa-aea8-4730-b5a2-13ce5f56a52e/bin/uautomizer-QkZJyEgLgS/data/24913d33f/b962a6e53f574f0db1c80a33489f4e57 [2022-11-23 02:56:19,456 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 02:56:19,458 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 02:56:19,462 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 02:56:19,463 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 02:56:19,469 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 02:56:19,474 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:56:19" (1/1) ... [2022-11-23 02:56:19,475 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@538328b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:56:19, skipping insertion in model container [2022-11-23 02:56:19,476 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:56:19" (1/1) ... [2022-11-23 02:56:19,485 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 02:56:19,517 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 02:56:19,763 WARN L237 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_f67434aa-aea8-4730-b5a2-13ce5f56a52e/sv-benchmarks/c/weaver/test-context1.wvr.c[2433,2446] [2022-11-23 02:56:19,788 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 02:56:19,797 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 02:56:19,842 WARN L237 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_f67434aa-aea8-4730-b5a2-13ce5f56a52e/sv-benchmarks/c/weaver/test-context1.wvr.c[2433,2446] [2022-11-23 02:56:19,847 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 02:56:19,866 INFO L208 MainTranslator]: Completed translation [2022-11-23 02:56:19,867 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:56:19 WrapperNode [2022-11-23 02:56:19,867 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 02:56:19,869 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 02:56:19,869 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 02:56:19,869 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 02:56:19,877 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:56:19" (1/1) ... [2022-11-23 02:56:19,898 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:56:19" (1/1) ... [2022-11-23 02:56:19,935 INFO L138 Inliner]: procedures = 24, calls = 34, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 131 [2022-11-23 02:56:19,936 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 02:56:19,937 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 02:56:19,937 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 02:56:19,937 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 02:56:19,947 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:56:19" (1/1) ... [2022-11-23 02:56:19,947 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:56:19" (1/1) ... [2022-11-23 02:56:19,962 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:56:19" (1/1) ... [2022-11-23 02:56:19,962 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:56:19" (1/1) ... [2022-11-23 02:56:19,967 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:56:19" (1/1) ... [2022-11-23 02:56:19,971 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:56:19" (1/1) ... [2022-11-23 02:56:19,973 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:56:19" (1/1) ... [2022-11-23 02:56:19,974 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:56:19" (1/1) ... [2022-11-23 02:56:19,976 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 02:56:19,977 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 02:56:19,978 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 02:56:19,978 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 02:56:19,979 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:56:19" (1/1) ... [2022-11-23 02:56:19,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 02:56:20,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f67434aa-aea8-4730-b5a2-13ce5f56a52e/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:56:20,013 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f67434aa-aea8-4730-b5a2-13ce5f56a52e/bin/uautomizer-QkZJyEgLgS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 02:56:20,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f67434aa-aea8-4730-b5a2-13ce5f56a52e/bin/uautomizer-QkZJyEgLgS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 02:56:20,064 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 02:56:20,065 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-23 02:56:20,065 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-23 02:56:20,065 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-23 02:56:20,065 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-23 02:56:20,065 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 02:56:20,066 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 02:56:20,066 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-23 02:56:20,066 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-23 02:56:20,066 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-23 02:56:20,066 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-23 02:56:20,066 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 02:56:20,067 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 02:56:20,067 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-23 02:56:20,067 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 02:56:20,069 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-23 02:56:20,181 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 02:56:20,183 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 02:56:20,573 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 02:56:20,705 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 02:56:20,705 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-23 02:56:20,708 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:56:20 BoogieIcfgContainer [2022-11-23 02:56:20,708 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 02:56:20,710 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 02:56:20,711 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 02:56:20,714 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 02:56:20,715 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:56:19" (1/3) ... [2022-11-23 02:56:20,715 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@509d8974 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:56:20, skipping insertion in model container [2022-11-23 02:56:20,716 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:56:19" (2/3) ... [2022-11-23 02:56:20,716 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@509d8974 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:56:20, skipping insertion in model container [2022-11-23 02:56:20,716 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:56:20" (3/3) ... [2022-11-23 02:56:20,717 INFO L112 eAbstractionObserver]: Analyzing ICFG test-context1.wvr.c [2022-11-23 02:56:20,726 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-23 02:56:20,738 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 02:56:20,738 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 02:56:20,738 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-23 02:56:20,860 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-23 02:56:20,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 114 places, 116 transitions, 248 flow [2022-11-23 02:56:21,006 INFO L130 PetriNetUnfolder]: 9/114 cut-off events. [2022-11-23 02:56:21,006 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-23 02:56:21,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123 conditions, 114 events. 9/114 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 61 event pairs, 0 based on Foata normal form. 0/104 useless extension candidates. Maximal degree in co-relation 81. Up to 2 conditions per place. [2022-11-23 02:56:21,011 INFO L82 GeneralOperation]: Start removeDead. Operand has 114 places, 116 transitions, 248 flow [2022-11-23 02:56:21,016 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 103 places, 105 transitions, 222 flow [2022-11-23 02:56:21,025 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-23 02:56:21,048 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 103 places, 105 transitions, 222 flow [2022-11-23 02:56:21,051 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 103 places, 105 transitions, 222 flow [2022-11-23 02:56:21,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 103 places, 105 transitions, 222 flow [2022-11-23 02:56:21,087 INFO L130 PetriNetUnfolder]: 9/105 cut-off events. [2022-11-23 02:56:21,088 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-23 02:56:21,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114 conditions, 105 events. 9/105 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 59 event pairs, 0 based on Foata normal form. 0/96 useless extension candidates. Maximal degree in co-relation 81. Up to 2 conditions per place. [2022-11-23 02:56:21,090 INFO L119 LiptonReduction]: Number of co-enabled transitions 368 [2022-11-23 02:56:26,919 INFO L134 LiptonReduction]: Checked pairs total: 457 [2022-11-23 02:56:26,919 INFO L136 LiptonReduction]: Total number of compositions: 113 [2022-11-23 02:56:26,937 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 02:56:26,944 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@26f6f107, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 02:56:26,944 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-23 02:56:26,951 INFO L130 PetriNetUnfolder]: 3/14 cut-off events. [2022-11-23 02:56:26,951 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-23 02:56:26,951 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:56:26,952 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:56:26,953 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 02:56:26,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:56:26,958 INFO L85 PathProgramCache]: Analyzing trace with hash -2040237074, now seen corresponding path program 1 times [2022-11-23 02:56:26,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:56:26,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704505381] [2022-11-23 02:56:26,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:56:26,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:56:27,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:56:27,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:56:27,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:56:27,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704505381] [2022-11-23 02:56:27,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704505381] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 02:56:27,486 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 02:56:27,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 02:56:27,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124694373] [2022-11-23 02:56:27,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:56:27,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 02:56:27,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:56:27,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 02:56:27,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 02:56:27,556 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 229 [2022-11-23 02:56:27,563 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 15 transitions, 42 flow. Second operand has 3 states, 3 states have (on average 105.0) internal successors, (315), 3 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:56:27,564 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:56:27,565 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 229 [2022-11-23 02:56:27,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:56:27,658 INFO L130 PetriNetUnfolder]: 38/71 cut-off events. [2022-11-23 02:56:27,659 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-11-23 02:56:27,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 158 conditions, 71 events. 38/71 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 136 event pairs, 9 based on Foata normal form. 1/49 useless extension candidates. Maximal degree in co-relation 100. Up to 37 conditions per place. [2022-11-23 02:56:27,665 INFO L137 encePairwiseOnDemand]: 226/229 looper letters, 19 selfloop transitions, 2 changer transitions 2/23 dead transitions. [2022-11-23 02:56:27,665 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 23 transitions, 110 flow [2022-11-23 02:56:27,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 02:56:27,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 02:56:27,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 327 transitions. [2022-11-23 02:56:27,695 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4759825327510917 [2022-11-23 02:56:27,696 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 327 transitions. [2022-11-23 02:56:27,696 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 327 transitions. [2022-11-23 02:56:27,701 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:56:27,704 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 327 transitions. [2022-11-23 02:56:27,713 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 109.0) internal successors, (327), 3 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:56:27,721 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 229.0) internal successors, (916), 4 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:56:27,723 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 229.0) internal successors, (916), 4 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:56:27,725 INFO L175 Difference]: Start difference. First operand has 19 places, 15 transitions, 42 flow. Second operand 3 states and 327 transitions. [2022-11-23 02:56:27,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 23 transitions, 110 flow [2022-11-23 02:56:27,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 17 places, 23 transitions, 98 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-23 02:56:27,731 INFO L231 Difference]: Finished difference. Result has 18 places, 16 transitions, 46 flow [2022-11-23 02:56:27,733 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=15, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=46, PETRI_PLACES=18, PETRI_TRANSITIONS=16} [2022-11-23 02:56:27,737 INFO L288 CegarLoopForPetriNet]: 19 programPoint places, -1 predicate places. [2022-11-23 02:56:27,737 INFO L495 AbstractCegarLoop]: Abstraction has has 18 places, 16 transitions, 46 flow [2022-11-23 02:56:27,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 105.0) internal successors, (315), 3 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:56:27,738 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:56:27,738 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:56:27,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 02:56:27,740 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 02:56:27,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:56:27,744 INFO L85 PathProgramCache]: Analyzing trace with hash 502349014, now seen corresponding path program 1 times [2022-11-23 02:56:27,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:56:27,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773719196] [2022-11-23 02:56:27,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:56:27,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:56:27,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:56:27,931 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:56:27,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:56:27,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773719196] [2022-11-23 02:56:27,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773719196] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 02:56:27,932 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 02:56:27,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 02:56:27,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066980308] [2022-11-23 02:56:27,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:56:27,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 02:56:27,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:56:27,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 02:56:27,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 02:56:27,941 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 229 [2022-11-23 02:56:27,942 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 18 places, 16 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 106.33333333333333) internal successors, (319), 3 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:56:27,942 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:56:27,943 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 229 [2022-11-23 02:56:27,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:56:28,039 INFO L130 PetriNetUnfolder]: 52/102 cut-off events. [2022-11-23 02:56:28,040 INFO L131 PetriNetUnfolder]: For 14/14 co-relation queries the response was YES. [2022-11-23 02:56:28,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 233 conditions, 102 events. 52/102 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 253 event pairs, 17 based on Foata normal form. 6/91 useless extension candidates. Maximal degree in co-relation 135. Up to 74 conditions per place. [2022-11-23 02:56:28,043 INFO L137 encePairwiseOnDemand]: 226/229 looper letters, 18 selfloop transitions, 2 changer transitions 5/25 dead transitions. [2022-11-23 02:56:28,043 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 20 places, 25 transitions, 117 flow [2022-11-23 02:56:28,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 02:56:28,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 02:56:28,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 331 transitions. [2022-11-23 02:56:28,047 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48180494905385735 [2022-11-23 02:56:28,047 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 331 transitions. [2022-11-23 02:56:28,047 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 331 transitions. [2022-11-23 02:56:28,048 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:56:28,048 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 331 transitions. [2022-11-23 02:56:28,050 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 110.33333333333333) internal successors, (331), 3 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:56:28,056 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 229.0) internal successors, (916), 4 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:56:28,057 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 229.0) internal successors, (916), 4 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:56:28,057 INFO L175 Difference]: Start difference. First operand has 18 places, 16 transitions, 46 flow. Second operand 3 states and 331 transitions. [2022-11-23 02:56:28,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 20 places, 25 transitions, 117 flow [2022-11-23 02:56:28,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 25 transitions, 115 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-23 02:56:28,060 INFO L231 Difference]: Finished difference. Result has 20 places, 17 transitions, 56 flow [2022-11-23 02:56:28,060 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=44, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=56, PETRI_PLACES=20, PETRI_TRANSITIONS=17} [2022-11-23 02:56:28,064 INFO L288 CegarLoopForPetriNet]: 19 programPoint places, 1 predicate places. [2022-11-23 02:56:28,064 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 17 transitions, 56 flow [2022-11-23 02:56:28,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 106.33333333333333) internal successors, (319), 3 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:56:28,066 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:56:28,066 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:56:28,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 02:56:28,066 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 02:56:28,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:56:28,070 INFO L85 PathProgramCache]: Analyzing trace with hash 1480786137, now seen corresponding path program 1 times [2022-11-23 02:56:28,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:56:28,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527380159] [2022-11-23 02:56:28,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:56:28,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:56:28,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:56:28,325 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 02:56:28,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:56:28,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527380159] [2022-11-23 02:56:28,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527380159] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 02:56:28,326 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 02:56:28,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 02:56:28,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518022829] [2022-11-23 02:56:28,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:56:28,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 02:56:28,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:56:28,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 02:56:28,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 02:56:28,395 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 229 [2022-11-23 02:56:28,396 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 17 transitions, 56 flow. Second operand has 4 states, 4 states have (on average 98.5) internal successors, (394), 4 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:56:28,397 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:56:28,397 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 229 [2022-11-23 02:56:28,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:56:28,546 INFO L130 PetriNetUnfolder]: 61/130 cut-off events. [2022-11-23 02:56:28,547 INFO L131 PetriNetUnfolder]: For 34/34 co-relation queries the response was YES. [2022-11-23 02:56:28,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 316 conditions, 130 events. 61/130 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 371 event pairs, 44 based on Foata normal form. 6/134 useless extension candidates. Maximal degree in co-relation 212. Up to 103 conditions per place. [2022-11-23 02:56:28,549 INFO L137 encePairwiseOnDemand]: 225/229 looper letters, 16 selfloop transitions, 2 changer transitions 10/28 dead transitions. [2022-11-23 02:56:28,550 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 28 transitions, 138 flow [2022-11-23 02:56:28,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 02:56:28,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-23 02:56:28,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 407 transitions. [2022-11-23 02:56:28,553 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4443231441048035 [2022-11-23 02:56:28,553 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 407 transitions. [2022-11-23 02:56:28,553 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 407 transitions. [2022-11-23 02:56:28,554 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:56:28,554 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 407 transitions. [2022-11-23 02:56:28,557 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 101.75) internal successors, (407), 4 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:56:28,561 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 229.0) internal successors, (1145), 5 states have internal predecessors, (1145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:56:28,563 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 229.0) internal successors, (1145), 5 states have internal predecessors, (1145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:56:28,563 INFO L175 Difference]: Start difference. First operand has 20 places, 17 transitions, 56 flow. Second operand 4 states and 407 transitions. [2022-11-23 02:56:28,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 28 transitions, 138 flow [2022-11-23 02:56:28,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 28 transitions, 136 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-23 02:56:28,566 INFO L231 Difference]: Finished difference. Result has 24 places, 18 transitions, 68 flow [2022-11-23 02:56:28,567 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=68, PETRI_PLACES=24, PETRI_TRANSITIONS=18} [2022-11-23 02:56:28,568 INFO L288 CegarLoopForPetriNet]: 19 programPoint places, 5 predicate places. [2022-11-23 02:56:28,569 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 18 transitions, 68 flow [2022-11-23 02:56:28,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 98.5) internal successors, (394), 4 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:56:28,569 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:56:28,570 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:56:28,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-23 02:56:28,570 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 02:56:28,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:56:28,571 INFO L85 PathProgramCache]: Analyzing trace with hash -2019706179, now seen corresponding path program 1 times [2022-11-23 02:56:28,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:56:28,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141372110] [2022-11-23 02:56:28,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:56:28,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:56:28,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:56:28,939 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 02:56:28,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:56:28,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141372110] [2022-11-23 02:56:28,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141372110] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:56:28,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896532369] [2022-11-23 02:56:28,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:56:28,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:56:28,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f67434aa-aea8-4730-b5a2-13ce5f56a52e/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:56:28,945 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f67434aa-aea8-4730-b5a2-13ce5f56a52e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:56:28,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f67434aa-aea8-4730-b5a2-13ce5f56a52e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 02:56:29,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:56:29,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-23 02:56:29,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:56:29,241 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-23 02:56:29,250 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 02:56:29,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:56:29,309 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-11-23 02:56:29,310 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 13 [2022-11-23 02:56:29,347 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 02:56:29,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896532369] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:56:29,348 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 02:56:29,348 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 6 [2022-11-23 02:56:29,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118647014] [2022-11-23 02:56:29,348 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 02:56:29,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 02:56:29,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:56:29,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 02:56:29,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-11-23 02:56:29,492 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 229 [2022-11-23 02:56:29,494 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 18 transitions, 68 flow. Second operand has 8 states, 8 states have (on average 95.125) internal successors, (761), 8 states have internal predecessors, (761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:56:29,494 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:56:29,494 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 229 [2022-11-23 02:56:29,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:56:29,690 INFO L130 PetriNetUnfolder]: 86/165 cut-off events. [2022-11-23 02:56:29,690 INFO L131 PetriNetUnfolder]: For 57/57 co-relation queries the response was YES. [2022-11-23 02:56:29,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 419 conditions, 165 events. 86/165 cut-off events. For 57/57 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 511 event pairs, 13 based on Foata normal form. 1/165 useless extension candidates. Maximal degree in co-relation 403. Up to 58 conditions per place. [2022-11-23 02:56:29,696 INFO L137 encePairwiseOnDemand]: 224/229 looper letters, 28 selfloop transitions, 6 changer transitions 9/43 dead transitions. [2022-11-23 02:56:29,696 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 43 transitions, 222 flow [2022-11-23 02:56:29,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 02:56:29,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-23 02:56:29,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 502 transitions. [2022-11-23 02:56:29,698 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43842794759825326 [2022-11-23 02:56:29,698 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 502 transitions. [2022-11-23 02:56:29,698 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 502 transitions. [2022-11-23 02:56:29,699 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:56:29,699 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 502 transitions. [2022-11-23 02:56:29,701 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 100.4) internal successors, (502), 5 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:56:29,703 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 229.0) internal successors, (1374), 6 states have internal predecessors, (1374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:56:29,704 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 229.0) internal successors, (1374), 6 states have internal predecessors, (1374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:56:29,704 INFO L175 Difference]: Start difference. First operand has 24 places, 18 transitions, 68 flow. Second operand 5 states and 502 transitions. [2022-11-23 02:56:29,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 43 transitions, 222 flow [2022-11-23 02:56:29,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 43 transitions, 216 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-11-23 02:56:29,709 INFO L231 Difference]: Finished difference. Result has 27 places, 21 transitions, 99 flow [2022-11-23 02:56:29,709 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=99, PETRI_PLACES=27, PETRI_TRANSITIONS=21} [2022-11-23 02:56:29,711 INFO L288 CegarLoopForPetriNet]: 19 programPoint places, 8 predicate places. [2022-11-23 02:56:29,711 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 21 transitions, 99 flow [2022-11-23 02:56:29,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 95.125) internal successors, (761), 8 states have internal predecessors, (761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:56:29,712 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:56:29,712 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:56:29,724 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f67434aa-aea8-4730-b5a2-13ce5f56a52e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-23 02:56:29,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f67434aa-aea8-4730-b5a2-13ce5f56a52e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:56:29,919 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 02:56:29,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:56:29,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1853163061, now seen corresponding path program 2 times [2022-11-23 02:56:29,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:56:29,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930314888] [2022-11-23 02:56:29,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:56:29,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:56:30,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:56:30,543 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 02:56:30,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:56:30,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930314888] [2022-11-23 02:56:30,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930314888] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:56:30,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123884338] [2022-11-23 02:56:30,545 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 02:56:30,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:56:30,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f67434aa-aea8-4730-b5a2-13ce5f56a52e/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:56:30,547 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f67434aa-aea8-4730-b5a2-13ce5f56a52e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:56:30,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f67434aa-aea8-4730-b5a2-13ce5f56a52e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 02:56:30,654 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 02:56:30,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:56:30,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-23 02:56:30,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:56:30,731 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 02:56:30,781 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 02:56:30,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 02:56:30,880 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-23 02:56:30,930 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-23 02:56:30,935 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:56:30,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:56:31,085 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_102 (Array Int Int)) (v_ArrVal_103 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_102)) (.cse1 (* c_~front~0 4))) (or (not (= 5 (select (select .cse0 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ (* c_~size~0 4) .cse1 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)))) (= (select (select (store .cse0 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_103) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ .cse1 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) 5)))) is different from false [2022-11-23 02:56:31,103 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 02:56:31,103 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 48 [2022-11-23 02:56:31,117 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 02:56:31,118 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 106 treesize of output 97 [2022-11-23 02:56:31,142 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 02:56:31,143 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 55 [2022-11-23 02:56:31,153 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-11-23 02:56:31,277 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-11-23 02:56:31,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123884338] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:56:31,277 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 02:56:31,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 14 [2022-11-23 02:56:31,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007182519] [2022-11-23 02:56:31,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 02:56:31,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-23 02:56:31,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:56:31,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-23 02:56:31,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=161, Unknown=3, NotChecked=26, Total=240 [2022-11-23 02:56:31,359 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 229 [2022-11-23 02:56:31,361 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 21 transitions, 99 flow. Second operand has 16 states, 16 states have (on average 76.125) internal successors, (1218), 16 states have internal predecessors, (1218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:56:31,361 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:56:31,361 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 229 [2022-11-23 02:56:31,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:56:31,653 INFO L130 PetriNetUnfolder]: 102/194 cut-off events. [2022-11-23 02:56:31,653 INFO L131 PetriNetUnfolder]: For 132/132 co-relation queries the response was YES. [2022-11-23 02:56:31,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 542 conditions, 194 events. 102/194 cut-off events. For 132/132 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 626 event pairs, 18 based on Foata normal form. 1/194 useless extension candidates. Maximal degree in co-relation 520. Up to 64 conditions per place. [2022-11-23 02:56:31,655 INFO L137 encePairwiseOnDemand]: 224/229 looper letters, 27 selfloop transitions, 7 changer transitions 9/43 dead transitions. [2022-11-23 02:56:31,655 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 43 transitions, 244 flow [2022-11-23 02:56:31,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 02:56:31,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-23 02:56:31,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 486 transitions. [2022-11-23 02:56:31,658 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3537117903930131 [2022-11-23 02:56:31,658 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 486 transitions. [2022-11-23 02:56:31,658 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 486 transitions. [2022-11-23 02:56:31,659 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:56:31,659 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 486 transitions. [2022-11-23 02:56:31,660 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 81.0) internal successors, (486), 6 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:56:31,662 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 229.0) internal successors, (1603), 7 states have internal predecessors, (1603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:56:31,663 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 229.0) internal successors, (1603), 7 states have internal predecessors, (1603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:56:31,663 INFO L175 Difference]: Start difference. First operand has 27 places, 21 transitions, 99 flow. Second operand 6 states and 486 transitions. [2022-11-23 02:56:31,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 43 transitions, 244 flow [2022-11-23 02:56:31,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 43 transitions, 239 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-23 02:56:31,666 INFO L231 Difference]: Finished difference. Result has 31 places, 22 transitions, 122 flow [2022-11-23 02:56:31,667 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=122, PETRI_PLACES=31, PETRI_TRANSITIONS=22} [2022-11-23 02:56:31,667 INFO L288 CegarLoopForPetriNet]: 19 programPoint places, 12 predicate places. [2022-11-23 02:56:31,668 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 22 transitions, 122 flow [2022-11-23 02:56:31,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 76.125) internal successors, (1218), 16 states have internal predecessors, (1218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:56:31,669 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:56:31,669 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:56:31,683 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f67434aa-aea8-4730-b5a2-13ce5f56a52e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 02:56:31,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f67434aa-aea8-4730-b5a2-13ce5f56a52e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:56:31,878 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 02:56:31,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:56:31,879 INFO L85 PathProgramCache]: Analyzing trace with hash -1253406587, now seen corresponding path program 3 times [2022-11-23 02:56:31,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:56:31,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125690488] [2022-11-23 02:56:31,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:56:31,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:56:31,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:56:31,961 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 02:56:31,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:56:31,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125690488] [2022-11-23 02:56:31,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125690488] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:56:31,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948535293] [2022-11-23 02:56:31,962 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 02:56:31,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:56:31,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f67434aa-aea8-4730-b5a2-13ce5f56a52e/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:56:31,964 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f67434aa-aea8-4730-b5a2-13ce5f56a52e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:56:31,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f67434aa-aea8-4730-b5a2-13ce5f56a52e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 02:56:32,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-23 02:56:32,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:56:32,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-23 02:56:32,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:56:32,104 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 02:56:32,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:56:32,145 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 02:56:32,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948535293] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:56:32,150 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 02:56:32,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 4 [2022-11-23 02:56:32,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703584657] [2022-11-23 02:56:32,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 02:56:32,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 02:56:32,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:56:32,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 02:56:32,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-23 02:56:32,156 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 229 [2022-11-23 02:56:32,157 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 22 transitions, 122 flow. Second operand has 5 states, 5 states have (on average 106.8) internal successors, (534), 5 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:56:32,157 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:56:32,157 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 229 [2022-11-23 02:56:32,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:56:32,316 INFO L130 PetriNetUnfolder]: 218/422 cut-off events. [2022-11-23 02:56:32,317 INFO L131 PetriNetUnfolder]: For 678/678 co-relation queries the response was YES. [2022-11-23 02:56:32,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1206 conditions, 422 events. 218/422 cut-off events. For 678/678 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1824 event pairs, 65 based on Foata normal form. 18/439 useless extension candidates. Maximal degree in co-relation 1182. Up to 182 conditions per place. [2022-11-23 02:56:32,320 INFO L137 encePairwiseOnDemand]: 226/229 looper letters, 37 selfloop transitions, 9 changer transitions 0/46 dead transitions. [2022-11-23 02:56:32,320 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 46 transitions, 328 flow [2022-11-23 02:56:32,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 02:56:32,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-23 02:56:32,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 445 transitions. [2022-11-23 02:56:32,322 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48580786026200873 [2022-11-23 02:56:32,323 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 445 transitions. [2022-11-23 02:56:32,323 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 445 transitions. [2022-11-23 02:56:32,323 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:56:32,324 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 445 transitions. [2022-11-23 02:56:32,325 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 111.25) internal successors, (445), 4 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:56:32,327 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 229.0) internal successors, (1145), 5 states have internal predecessors, (1145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:56:32,328 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 229.0) internal successors, (1145), 5 states have internal predecessors, (1145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:56:32,328 INFO L175 Difference]: Start difference. First operand has 31 places, 22 transitions, 122 flow. Second operand 4 states and 445 transitions. [2022-11-23 02:56:32,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 46 transitions, 328 flow [2022-11-23 02:56:32,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 46 transitions, 306 flow, removed 4 selfloop flow, removed 4 redundant places. [2022-11-23 02:56:32,333 INFO L231 Difference]: Finished difference. Result has 32 places, 29 transitions, 210 flow [2022-11-23 02:56:32,333 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=210, PETRI_PLACES=32, PETRI_TRANSITIONS=29} [2022-11-23 02:56:32,334 INFO L288 CegarLoopForPetriNet]: 19 programPoint places, 13 predicate places. [2022-11-23 02:56:32,334 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 29 transitions, 210 flow [2022-11-23 02:56:32,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 106.8) internal successors, (534), 5 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:56:32,335 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:56:32,335 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:56:32,347 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f67434aa-aea8-4730-b5a2-13ce5f56a52e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-23 02:56:32,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f67434aa-aea8-4730-b5a2-13ce5f56a52e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-23 02:56:32,547 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 02:56:32,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:56:32,548 INFO L85 PathProgramCache]: Analyzing trace with hash -2140740952, now seen corresponding path program 4 times [2022-11-23 02:56:32,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:56:32,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633630877] [2022-11-23 02:56:32,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:56:32,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:56:32,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:56:32,709 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 02:56:32,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:56:32,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633630877] [2022-11-23 02:56:32,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633630877] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:56:32,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955912706] [2022-11-23 02:56:32,710 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 02:56:32,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:56:32,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f67434aa-aea8-4730-b5a2-13ce5f56a52e/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:56:32,711 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f67434aa-aea8-4730-b5a2-13ce5f56a52e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:56:32,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f67434aa-aea8-4730-b5a2-13ce5f56a52e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 02:56:32,813 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 02:56:32,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:56:32,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-23 02:56:32,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:56:32,925 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 02:56:32,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:56:33,052 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 02:56:33,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955912706] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:56:33,052 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 02:56:33,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2022-11-23 02:56:33,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472274850] [2022-11-23 02:56:33,053 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 02:56:33,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-23 02:56:33,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:56:33,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-23 02:56:33,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-11-23 02:56:33,267 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 229 [2022-11-23 02:56:33,269 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 29 transitions, 210 flow. Second operand has 14 states, 14 states have (on average 95.64285714285714) internal successors, (1339), 14 states have internal predecessors, (1339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:56:33,269 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:56:33,269 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 229 [2022-11-23 02:56:33,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:56:33,662 INFO L130 PetriNetUnfolder]: 272/553 cut-off events. [2022-11-23 02:56:33,662 INFO L131 PetriNetUnfolder]: For 1175/1175 co-relation queries the response was YES. [2022-11-23 02:56:33,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1756 conditions, 553 events. 272/553 cut-off events. For 1175/1175 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2725 event pairs, 176 based on Foata normal form. 19/570 useless extension candidates. Maximal degree in co-relation 1347. Up to 422 conditions per place. [2022-11-23 02:56:33,665 INFO L137 encePairwiseOnDemand]: 224/229 looper letters, 27 selfloop transitions, 3 changer transitions 27/57 dead transitions. [2022-11-23 02:56:33,665 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 57 transitions, 434 flow [2022-11-23 02:56:33,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 02:56:33,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-23 02:56:33,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 696 transitions. [2022-11-23 02:56:33,668 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43418590143480973 [2022-11-23 02:56:33,668 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 696 transitions. [2022-11-23 02:56:33,668 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 696 transitions. [2022-11-23 02:56:33,668 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:56:33,668 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 696 transitions. [2022-11-23 02:56:33,670 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 99.42857142857143) internal successors, (696), 7 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:56:33,672 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 229.0) internal successors, (1832), 8 states have internal predecessors, (1832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:56:33,673 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 229.0) internal successors, (1832), 8 states have internal predecessors, (1832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:56:33,673 INFO L175 Difference]: Start difference. First operand has 32 places, 29 transitions, 210 flow. Second operand 7 states and 696 transitions. [2022-11-23 02:56:33,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 57 transitions, 434 flow [2022-11-23 02:56:33,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 57 transitions, 424 flow, removed 5 selfloop flow, removed 0 redundant places. [2022-11-23 02:56:33,677 INFO L231 Difference]: Finished difference. Result has 42 places, 30 transitions, 230 flow [2022-11-23 02:56:33,677 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=230, PETRI_PLACES=42, PETRI_TRANSITIONS=30} [2022-11-23 02:56:33,678 INFO L288 CegarLoopForPetriNet]: 19 programPoint places, 23 predicate places. [2022-11-23 02:56:33,678 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 30 transitions, 230 flow [2022-11-23 02:56:33,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 95.64285714285714) internal successors, (1339), 14 states have internal predecessors, (1339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:56:33,679 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:56:33,679 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:56:33,691 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f67434aa-aea8-4730-b5a2-13ce5f56a52e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-23 02:56:33,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f67434aa-aea8-4730-b5a2-13ce5f56a52e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:56:33,886 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 02:56:33,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:56:33,886 INFO L85 PathProgramCache]: Analyzing trace with hash -1771270590, now seen corresponding path program 5 times [2022-11-23 02:56:33,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:56:33,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573219591] [2022-11-23 02:56:33,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:56:33,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:56:33,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:56:34,396 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 02:56:34,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:56:34,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573219591] [2022-11-23 02:56:34,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573219591] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:56:34,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768939201] [2022-11-23 02:56:34,397 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-23 02:56:34,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:56:34,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f67434aa-aea8-4730-b5a2-13ce5f56a52e/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:56:34,398 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f67434aa-aea8-4730-b5a2-13ce5f56a52e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:56:34,413 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f67434aa-aea8-4730-b5a2-13ce5f56a52e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 02:56:34,510 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 02:56:34,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:56:34,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-23 02:56:34,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:56:34,821 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-23 02:56:34,821 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 10 [2022-11-23 02:56:34,828 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 02:56:34,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:56:34,921 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-11-23 02:56:34,921 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 13 [2022-11-23 02:56:35,018 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 02:56:35,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768939201] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:56:35,018 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 02:56:35,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 5] total 15 [2022-11-23 02:56:35,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12300178] [2022-11-23 02:56:35,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 02:56:35,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-23 02:56:35,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:56:35,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-23 02:56:35,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2022-11-23 02:56:35,371 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 229 [2022-11-23 02:56:35,373 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 30 transitions, 230 flow. Second operand has 17 states, 17 states have (on average 90.70588235294117) internal successors, (1542), 17 states have internal predecessors, (1542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:56:35,373 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:56:35,373 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 229 [2022-11-23 02:56:35,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:56:36,393 INFO L130 PetriNetUnfolder]: 332/632 cut-off events. [2022-11-23 02:56:36,393 INFO L131 PetriNetUnfolder]: For 1154/1154 co-relation queries the response was YES. [2022-11-23 02:56:36,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2079 conditions, 632 events. 332/632 cut-off events. For 1154/1154 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2979 event pairs, 21 based on Foata normal form. 1/632 useless extension candidates. Maximal degree in co-relation 2049. Up to 126 conditions per place. [2022-11-23 02:56:36,398 INFO L137 encePairwiseOnDemand]: 223/229 looper letters, 89 selfloop transitions, 26 changer transitions 34/149 dead transitions. [2022-11-23 02:56:36,398 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 149 transitions, 948 flow [2022-11-23 02:56:36,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-23 02:56:36,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-23 02:56:36,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1729 transitions. [2022-11-23 02:56:36,404 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41945657447840856 [2022-11-23 02:56:36,404 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1729 transitions. [2022-11-23 02:56:36,404 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1729 transitions. [2022-11-23 02:56:36,406 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:56:36,406 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1729 transitions. [2022-11-23 02:56:36,410 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 96.05555555555556) internal successors, (1729), 18 states have internal predecessors, (1729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:56:36,417 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 229.0) internal successors, (4351), 19 states have internal predecessors, (4351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:56:36,419 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 229.0) internal successors, (4351), 19 states have internal predecessors, (4351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:56:36,419 INFO L175 Difference]: Start difference. First operand has 42 places, 30 transitions, 230 flow. Second operand 18 states and 1729 transitions. [2022-11-23 02:56:36,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 149 transitions, 948 flow [2022-11-23 02:56:36,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 149 transitions, 922 flow, removed 11 selfloop flow, removed 5 redundant places. [2022-11-23 02:56:36,425 INFO L231 Difference]: Finished difference. Result has 52 places, 42 transitions, 383 flow [2022-11-23 02:56:36,425 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=383, PETRI_PLACES=52, PETRI_TRANSITIONS=42} [2022-11-23 02:56:36,426 INFO L288 CegarLoopForPetriNet]: 19 programPoint places, 33 predicate places. [2022-11-23 02:56:36,426 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 42 transitions, 383 flow [2022-11-23 02:56:36,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 90.70588235294117) internal successors, (1542), 17 states have internal predecessors, (1542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:56:36,427 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:56:36,427 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:56:36,434 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f67434aa-aea8-4730-b5a2-13ce5f56a52e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-23 02:56:36,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f67434aa-aea8-4730-b5a2-13ce5f56a52e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:56:36,634 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 02:56:36,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:56:36,634 INFO L85 PathProgramCache]: Analyzing trace with hash 853982090, now seen corresponding path program 6 times [2022-11-23 02:56:36,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:56:36,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370290605] [2022-11-23 02:56:36,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:56:36,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:56:36,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:56:37,151 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 02:56:37,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:56:37,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370290605] [2022-11-23 02:56:37,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370290605] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:56:37,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191132986] [2022-11-23 02:56:37,152 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-23 02:56:37,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:56:37,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f67434aa-aea8-4730-b5a2-13ce5f56a52e/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:56:37,153 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f67434aa-aea8-4730-b5a2-13ce5f56a52e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:56:37,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f67434aa-aea8-4730-b5a2-13ce5f56a52e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-23 02:56:37,279 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-23 02:56:37,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:56:37,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-23 02:56:37,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:56:37,358 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 02:56:37,403 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 02:56:37,445 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 02:56:37,609 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-23 02:56:37,609 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 10 [2022-11-23 02:56:37,622 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:56:37,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:56:38,068 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 02:56:38,069 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 53 [2022-11-23 02:56:38,084 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-11-23 02:56:38,085 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 340 treesize of output 303 [2022-11-23 02:56:38,099 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-23 02:56:38,100 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 298 treesize of output 230 [2022-11-23 02:56:38,115 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-23 02:56:38,115 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 184 treesize of output 150 [2022-11-23 02:56:38,279 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:56:38,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191132986] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:56:38,279 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 02:56:38,280 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 20 [2022-11-23 02:56:38,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416029010] [2022-11-23 02:56:38,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 02:56:38,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-23 02:56:38,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:56:38,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-23 02:56:38,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=380, Unknown=3, NotChecked=0, Total=462 [2022-11-23 02:56:38,948 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 229 [2022-11-23 02:56:38,950 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 42 transitions, 383 flow. Second operand has 22 states, 22 states have (on average 68.86363636363636) internal successors, (1515), 22 states have internal predecessors, (1515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:56:38,950 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:56:38,950 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 229 [2022-11-23 02:56:38,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:56:41,135 INFO L130 PetriNetUnfolder]: 1263/2372 cut-off events. [2022-11-23 02:56:41,135 INFO L131 PetriNetUnfolder]: For 6035/6035 co-relation queries the response was YES. [2022-11-23 02:56:41,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8240 conditions, 2372 events. 1263/2372 cut-off events. For 6035/6035 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 14481 event pairs, 122 based on Foata normal form. 23/2393 useless extension candidates. Maximal degree in co-relation 5674. Up to 486 conditions per place. [2022-11-23 02:56:41,152 INFO L137 encePairwiseOnDemand]: 222/229 looper letters, 153 selfloop transitions, 81 changer transitions 64/298 dead transitions. [2022-11-23 02:56:41,153 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 298 transitions, 2435 flow [2022-11-23 02:56:41,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-23 02:56:41,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-11-23 02:56:41,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 2248 transitions. [2022-11-23 02:56:41,163 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3272197962154294 [2022-11-23 02:56:41,164 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 2248 transitions. [2022-11-23 02:56:41,164 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 2248 transitions. [2022-11-23 02:56:41,165 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:56:41,166 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 2248 transitions. [2022-11-23 02:56:41,172 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 74.93333333333334) internal successors, (2248), 30 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:56:41,184 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 229.0) internal successors, (7099), 31 states have internal predecessors, (7099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:56:41,187 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 229.0) internal successors, (7099), 31 states have internal predecessors, (7099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:56:41,187 INFO L175 Difference]: Start difference. First operand has 52 places, 42 transitions, 383 flow. Second operand 30 states and 2248 transitions. [2022-11-23 02:56:41,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 298 transitions, 2435 flow [2022-11-23 02:56:41,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 298 transitions, 2030 flow, removed 128 selfloop flow, removed 7 redundant places. [2022-11-23 02:56:41,206 INFO L231 Difference]: Finished difference. Result has 88 places, 111 transitions, 1209 flow [2022-11-23 02:56:41,207 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=282, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=1209, PETRI_PLACES=88, PETRI_TRANSITIONS=111} [2022-11-23 02:56:41,208 INFO L288 CegarLoopForPetriNet]: 19 programPoint places, 69 predicate places. [2022-11-23 02:56:41,208 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 111 transitions, 1209 flow [2022-11-23 02:56:41,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 68.86363636363636) internal successors, (1515), 22 states have internal predecessors, (1515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:56:41,209 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:56:41,209 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:56:41,224 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f67434aa-aea8-4730-b5a2-13ce5f56a52e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-23 02:56:41,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f67434aa-aea8-4730-b5a2-13ce5f56a52e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-23 02:56:41,415 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 02:56:41,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:56:41,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1429744684, now seen corresponding path program 7 times [2022-11-23 02:56:41,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:56:41,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686471212] [2022-11-23 02:56:41,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:56:41,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:56:41,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:56:42,006 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 02:56:42,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:56:42,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686471212] [2022-11-23 02:56:42,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686471212] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:56:42,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559095294] [2022-11-23 02:56:42,006 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 02:56:42,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:56:42,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f67434aa-aea8-4730-b5a2-13ce5f56a52e/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:56:42,008 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f67434aa-aea8-4730-b5a2-13ce5f56a52e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:56:42,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f67434aa-aea8-4730-b5a2-13ce5f56a52e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-23 02:56:42,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:56:42,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-23 02:56:42,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:56:42,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 02:56:42,419 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-11-23 02:56:42,507 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-23 02:56:42,513 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:56:42,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:56:42,787 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 02:56:42,787 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 37 [2022-11-23 02:56:42,803 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-11-23 02:56:43,069 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:56:43,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559095294] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:56:43,070 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 02:56:43,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 23 [2022-11-23 02:56:43,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302060669] [2022-11-23 02:56:43,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 02:56:43,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-23 02:56:43,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:56:43,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-23 02:56:43,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=521, Unknown=3, NotChecked=0, Total=600 [2022-11-23 02:56:44,076 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 229 [2022-11-23 02:56:44,078 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 111 transitions, 1209 flow. Second operand has 25 states, 25 states have (on average 83.88) internal successors, (2097), 25 states have internal predecessors, (2097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:56:44,079 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:56:44,079 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 229 [2022-11-23 02:56:44,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:56:45,478 INFO L130 PetriNetUnfolder]: 1279/2399 cut-off events. [2022-11-23 02:56:45,478 INFO L131 PetriNetUnfolder]: For 9315/9315 co-relation queries the response was YES. [2022-11-23 02:56:45,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9127 conditions, 2399 events. 1279/2399 cut-off events. For 9315/9315 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 14600 event pairs, 188 based on Foata normal form. 3/2400 useless extension candidates. Maximal degree in co-relation 7582. Up to 492 conditions per place. [2022-11-23 02:56:45,497 INFO L137 encePairwiseOnDemand]: 223/229 looper letters, 89 selfloop transitions, 84 changer transitions 28/201 dead transitions. [2022-11-23 02:56:45,497 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 201 transitions, 2025 flow [2022-11-23 02:56:45,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-23 02:56:45,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-11-23 02:56:45,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1513 transitions. [2022-11-23 02:56:45,502 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.388646288209607 [2022-11-23 02:56:45,503 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1513 transitions. [2022-11-23 02:56:45,503 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1513 transitions. [2022-11-23 02:56:45,504 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:56:45,504 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1513 transitions. [2022-11-23 02:56:45,508 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 89.0) internal successors, (1513), 17 states have internal predecessors, (1513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:56:45,515 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 229.0) internal successors, (4122), 18 states have internal predecessors, (4122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:56:45,516 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 229.0) internal successors, (4122), 18 states have internal predecessors, (4122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:56:45,517 INFO L175 Difference]: Start difference. First operand has 88 places, 111 transitions, 1209 flow. Second operand 17 states and 1513 transitions. [2022-11-23 02:56:45,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 201 transitions, 2025 flow [2022-11-23 02:56:45,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 201 transitions, 1842 flow, removed 88 selfloop flow, removed 3 redundant places. [2022-11-23 02:56:45,570 INFO L231 Difference]: Finished difference. Result has 102 places, 113 transitions, 1258 flow [2022-11-23 02:56:45,571 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=1036, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1258, PETRI_PLACES=102, PETRI_TRANSITIONS=113} [2022-11-23 02:56:45,572 INFO L288 CegarLoopForPetriNet]: 19 programPoint places, 83 predicate places. [2022-11-23 02:56:45,572 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 113 transitions, 1258 flow [2022-11-23 02:56:45,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 83.88) internal successors, (2097), 25 states have internal predecessors, (2097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:56:45,574 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:56:45,574 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:56:45,586 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f67434aa-aea8-4730-b5a2-13ce5f56a52e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-23 02:56:45,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f67434aa-aea8-4730-b5a2-13ce5f56a52e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-23 02:56:45,781 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 02:56:45,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:56:45,782 INFO L85 PathProgramCache]: Analyzing trace with hash 1641749000, now seen corresponding path program 8 times [2022-11-23 02:56:45,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:56:45,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923679978] [2022-11-23 02:56:45,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:56:45,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:56:45,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:56:45,929 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 02:56:45,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:56:45,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923679978] [2022-11-23 02:56:45,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923679978] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:56:45,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820896798] [2022-11-23 02:56:45,930 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 02:56:45,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:56:45,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f67434aa-aea8-4730-b5a2-13ce5f56a52e/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:56:45,934 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f67434aa-aea8-4730-b5a2-13ce5f56a52e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:56:45,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f67434aa-aea8-4730-b5a2-13ce5f56a52e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-23 02:56:46,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 02:56:46,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:56:46,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 02:56:46,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:56:46,081 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 02:56:46,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:56:46,128 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 02:56:46,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820896798] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:56:46,128 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 02:56:46,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-11-23 02:56:46,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105804834] [2022-11-23 02:56:46,129 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 02:56:46,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 02:56:46,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:56:46,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 02:56:46,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-11-23 02:56:46,133 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 229 [2022-11-23 02:56:46,134 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 113 transitions, 1258 flow. Second operand has 6 states, 6 states have (on average 106.33333333333333) internal successors, (638), 6 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:56:46,135 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:56:46,135 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 229 [2022-11-23 02:56:46,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:56:47,103 INFO L130 PetriNetUnfolder]: 2541/4758 cut-off events. [2022-11-23 02:56:47,104 INFO L131 PetriNetUnfolder]: For 20920/20920 co-relation queries the response was YES. [2022-11-23 02:56:47,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18585 conditions, 4758 events. 2541/4758 cut-off events. For 20920/20920 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 33581 event pairs, 550 based on Foata normal form. 66/4824 useless extension candidates. Maximal degree in co-relation 15632. Up to 1845 conditions per place. [2022-11-23 02:56:47,145 INFO L137 encePairwiseOnDemand]: 226/229 looper letters, 108 selfloop transitions, 111 changer transitions 0/219 dead transitions. [2022-11-23 02:56:47,145 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 219 transitions, 2856 flow [2022-11-23 02:56:47,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 02:56:47,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-23 02:56:47,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 558 transitions. [2022-11-23 02:56:47,148 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4873362445414847 [2022-11-23 02:56:47,148 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 558 transitions. [2022-11-23 02:56:47,149 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 558 transitions. [2022-11-23 02:56:47,149 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:56:47,149 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 558 transitions. [2022-11-23 02:56:47,151 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 111.6) internal successors, (558), 5 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:56:47,153 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 229.0) internal successors, (1374), 6 states have internal predecessors, (1374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:56:47,154 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 229.0) internal successors, (1374), 6 states have internal predecessors, (1374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:56:47,154 INFO L175 Difference]: Start difference. First operand has 102 places, 113 transitions, 1258 flow. Second operand 5 states and 558 transitions. [2022-11-23 02:56:47,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 219 transitions, 2856 flow [2022-11-23 02:56:47,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 219 transitions, 2622 flow, removed 31 selfloop flow, removed 10 redundant places. [2022-11-23 02:56:47,265 INFO L231 Difference]: Finished difference. Result has 99 places, 193 transitions, 2607 flow [2022-11-23 02:56:47,265 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=1130, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2607, PETRI_PLACES=99, PETRI_TRANSITIONS=193} [2022-11-23 02:56:47,266 INFO L288 CegarLoopForPetriNet]: 19 programPoint places, 80 predicate places. [2022-11-23 02:56:47,266 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 193 transitions, 2607 flow [2022-11-23 02:56:47,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 106.33333333333333) internal successors, (638), 6 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:56:47,267 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:56:47,267 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:56:47,282 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f67434aa-aea8-4730-b5a2-13ce5f56a52e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-23 02:56:47,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f67434aa-aea8-4730-b5a2-13ce5f56a52e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:56:47,474 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 02:56:47,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:56:47,474 INFO L85 PathProgramCache]: Analyzing trace with hash 139768153, now seen corresponding path program 9 times [2022-11-23 02:56:47,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:56:47,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431159790] [2022-11-23 02:56:47,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:56:47,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:56:47,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:56:47,739 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 02:56:47,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:56:47,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431159790] [2022-11-23 02:56:47,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431159790] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:56:47,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424782168] [2022-11-23 02:56:47,741 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 02:56:47,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:56:47,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f67434aa-aea8-4730-b5a2-13ce5f56a52e/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:56:47,742 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f67434aa-aea8-4730-b5a2-13ce5f56a52e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:56:47,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f67434aa-aea8-4730-b5a2-13ce5f56a52e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-23 02:56:48,031 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-23 02:56:48,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:56:48,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-23 02:56:48,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:56:48,212 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 02:56:48,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:56:48,415 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 02:56:48,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424782168] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:56:48,415 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 02:56:48,415 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2022-11-23 02:56:48,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205927007] [2022-11-23 02:56:48,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 02:56:48,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-23 02:56:48,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:56:48,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-23 02:56:48,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=373, Unknown=0, NotChecked=0, Total=506 [2022-11-23 02:56:48,732 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 229 [2022-11-23 02:56:48,747 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 193 transitions, 2607 flow. Second operand has 23 states, 23 states have (on average 94.78260869565217) internal successors, (2180), 23 states have internal predecessors, (2180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:56:48,747 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:56:48,748 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 229 [2022-11-23 02:56:48,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:56:49,680 INFO L130 PetriNetUnfolder]: 1003/1948 cut-off events. [2022-11-23 02:56:49,680 INFO L131 PetriNetUnfolder]: For 10684/10684 co-relation queries the response was YES. [2022-11-23 02:56:49,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8369 conditions, 1948 events. 1003/1948 cut-off events. For 10684/10684 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 12192 event pairs, 604 based on Foata normal form. 48/1996 useless extension candidates. Maximal degree in co-relation 8196. Up to 1528 conditions per place. [2022-11-23 02:56:49,699 INFO L137 encePairwiseOnDemand]: 224/229 looper letters, 71 selfloop transitions, 4 changer transitions 65/140 dead transitions. [2022-11-23 02:56:49,699 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 140 transitions, 1660 flow [2022-11-23 02:56:49,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-23 02:56:49,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-23 02:56:49,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1195 transitions. [2022-11-23 02:56:49,703 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43486171761280934 [2022-11-23 02:56:49,703 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1195 transitions. [2022-11-23 02:56:49,703 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1195 transitions. [2022-11-23 02:56:49,704 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:56:49,704 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1195 transitions. [2022-11-23 02:56:49,707 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 99.58333333333333) internal successors, (1195), 12 states have internal predecessors, (1195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:56:49,711 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 229.0) internal successors, (2977), 13 states have internal predecessors, (2977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:56:49,712 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 229.0) internal successors, (2977), 13 states have internal predecessors, (2977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:56:49,713 INFO L175 Difference]: Start difference. First operand has 99 places, 193 transitions, 2607 flow. Second operand 12 states and 1195 transitions. [2022-11-23 02:56:49,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 140 transitions, 1660 flow [2022-11-23 02:56:49,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 140 transitions, 1517 flow, removed 29 selfloop flow, removed 7 redundant places. [2022-11-23 02:56:49,763 INFO L231 Difference]: Finished difference. Result has 96 places, 75 transitions, 910 flow [2022-11-23 02:56:49,763 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=1123, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=910, PETRI_PLACES=96, PETRI_TRANSITIONS=75} [2022-11-23 02:56:49,764 INFO L288 CegarLoopForPetriNet]: 19 programPoint places, 77 predicate places. [2022-11-23 02:56:49,764 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 75 transitions, 910 flow [2022-11-23 02:56:49,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 94.78260869565217) internal successors, (2180), 23 states have internal predecessors, (2180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:56:49,766 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:56:49,766 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:56:49,782 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f67434aa-aea8-4730-b5a2-13ce5f56a52e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-11-23 02:56:49,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f67434aa-aea8-4730-b5a2-13ce5f56a52e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-23 02:56:49,972 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 02:56:49,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:56:49,972 INFO L85 PathProgramCache]: Analyzing trace with hash -1335797207, now seen corresponding path program 10 times [2022-11-23 02:56:49,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:56:49,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382966559] [2022-11-23 02:56:49,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:56:49,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:56:50,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:56:50,581 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:56:50,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:56:50,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382966559] [2022-11-23 02:56:50,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382966559] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:56:50,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915945321] [2022-11-23 02:56:50,582 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 02:56:50,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:56:50,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f67434aa-aea8-4730-b5a2-13ce5f56a52e/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:56:50,583 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f67434aa-aea8-4730-b5a2-13ce5f56a52e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:56:50,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f67434aa-aea8-4730-b5a2-13ce5f56a52e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-23 02:56:50,704 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 02:56:50,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:56:50,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-23 02:56:50,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:56:50,923 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-23 02:56:50,929 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 02:56:50,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:56:51,036 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-11-23 02:56:51,037 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 13 [2022-11-23 02:56:51,129 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-23 02:56:51,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915945321] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:56:51,130 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 02:56:51,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 7] total 23 [2022-11-23 02:56:51,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043341965] [2022-11-23 02:56:51,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 02:56:51,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-23 02:56:51,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:56:51,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-23 02:56:51,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2022-11-23 02:56:51,663 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 229 [2022-11-23 02:56:51,666 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 75 transitions, 910 flow. Second operand has 25 states, 25 states have (on average 92.12) internal successors, (2303), 25 states have internal predecessors, (2303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:56:51,666 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:56:51,666 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 229 [2022-11-23 02:56:51,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:56:53,778 INFO L130 PetriNetUnfolder]: 1230/2278 cut-off events. [2022-11-23 02:56:53,778 INFO L131 PetriNetUnfolder]: For 7609/7609 co-relation queries the response was YES. [2022-11-23 02:56:53,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8583 conditions, 2278 events. 1230/2278 cut-off events. For 7609/7609 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 13948 event pairs, 53 based on Foata normal form. 20/2298 useless extension candidates. Maximal degree in co-relation 8539. Up to 468 conditions per place. [2022-11-23 02:56:53,803 INFO L137 encePairwiseOnDemand]: 223/229 looper letters, 138 selfloop transitions, 98 changer transitions 128/364 dead transitions. [2022-11-23 02:56:53,804 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 364 transitions, 2829 flow [2022-11-23 02:56:53,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-11-23 02:56:53,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2022-11-23 02:56:53,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 4115 transitions. [2022-11-23 02:56:53,815 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4278436265335829 [2022-11-23 02:56:53,816 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 4115 transitions. [2022-11-23 02:56:53,816 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 4115 transitions. [2022-11-23 02:56:53,820 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:56:53,820 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 4115 transitions. [2022-11-23 02:56:53,828 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 97.97619047619048) internal successors, (4115), 42 states have internal predecessors, (4115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:56:53,839 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 229.0) internal successors, (9847), 43 states have internal predecessors, (9847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:56:53,843 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 229.0) internal successors, (9847), 43 states have internal predecessors, (9847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:56:53,843 INFO L175 Difference]: Start difference. First operand has 96 places, 75 transitions, 910 flow. Second operand 42 states and 4115 transitions. [2022-11-23 02:56:53,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 364 transitions, 2829 flow [2022-11-23 02:56:53,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 364 transitions, 2515 flow, removed 133 selfloop flow, removed 17 redundant places. [2022-11-23 02:56:53,873 INFO L231 Difference]: Finished difference. Result has 117 places, 114 transitions, 1467 flow [2022-11-23 02:56:53,874 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=740, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=1467, PETRI_PLACES=117, PETRI_TRANSITIONS=114} [2022-11-23 02:56:53,875 INFO L288 CegarLoopForPetriNet]: 19 programPoint places, 98 predicate places. [2022-11-23 02:56:53,875 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 114 transitions, 1467 flow [2022-11-23 02:56:53,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 92.12) internal successors, (2303), 25 states have internal predecessors, (2303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:56:53,876 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:56:53,876 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:56:53,885 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f67434aa-aea8-4730-b5a2-13ce5f56a52e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-23 02:56:54,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f67434aa-aea8-4730-b5a2-13ce5f56a52e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-23 02:56:54,083 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 02:56:54,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:56:54,083 INFO L85 PathProgramCache]: Analyzing trace with hash 1788903509, now seen corresponding path program 11 times [2022-11-23 02:56:54,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:56:54,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257448149] [2022-11-23 02:56:54,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:56:54,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:56:54,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:56:54,885 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:56:54,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:56:54,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257448149] [2022-11-23 02:56:54,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257448149] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:56:54,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240207943] [2022-11-23 02:56:54,886 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-23 02:56:54,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:56:54,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f67434aa-aea8-4730-b5a2-13ce5f56a52e/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:56:54,887 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f67434aa-aea8-4730-b5a2-13ce5f56a52e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:56:54,909 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f67434aa-aea8-4730-b5a2-13ce5f56a52e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-23 02:56:55,020 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-23 02:56:55,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:56:55,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-23 02:56:55,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:56:55,168 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 02:56:55,208 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 02:56:55,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 02:56:55,374 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-11-23 02:56:55,539 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-23 02:56:55,545 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:56:55,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:56:56,113 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 02:56:56,114 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 50 [2022-11-23 02:56:56,125 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 02:56:56,126 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 194 treesize of output 174 [2022-11-23 02:56:56,145 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 02:56:56,145 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 97 treesize of output 83 [2022-11-23 02:56:56,154 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 94 [2022-11-23 02:56:56,411 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 02:56:56,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240207943] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:56:56,411 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 02:56:56,411 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 32 [2022-11-23 02:56:56,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939377696] [2022-11-23 02:56:56,412 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 02:56:56,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-23 02:56:56,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:56:56,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-23 02:56:56,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1002, Unknown=2, NotChecked=0, Total=1122 [2022-11-23 02:56:57,668 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 229 [2022-11-23 02:56:57,670 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 114 transitions, 1467 flow. Second operand has 34 states, 34 states have (on average 82.6470588235294) internal successors, (2810), 34 states have internal predecessors, (2810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:56:57,671 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:56:57,671 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 229 [2022-11-23 02:56:57,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:56:59,845 INFO L130 PetriNetUnfolder]: 1368/2533 cut-off events. [2022-11-23 02:56:59,845 INFO L131 PetriNetUnfolder]: For 7561/7561 co-relation queries the response was YES. [2022-11-23 02:56:59,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9496 conditions, 2533 events. 1368/2533 cut-off events. For 7561/7561 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 15924 event pairs, 244 based on Foata normal form. 1/2534 useless extension candidates. Maximal degree in co-relation 9437. Up to 1054 conditions per place. [2022-11-23 02:56:59,856 INFO L137 encePairwiseOnDemand]: 224/229 looper letters, 122 selfloop transitions, 70 changer transitions 60/252 dead transitions. [2022-11-23 02:56:59,856 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 252 transitions, 2502 flow [2022-11-23 02:56:59,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-23 02:56:59,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2022-11-23 02:56:59,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2030 transitions. [2022-11-23 02:56:59,864 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3854186443895956 [2022-11-23 02:56:59,864 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2030 transitions. [2022-11-23 02:56:59,864 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2030 transitions. [2022-11-23 02:56:59,868 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:56:59,868 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2030 transitions. [2022-11-23 02:56:59,873 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 88.26086956521739) internal successors, (2030), 23 states have internal predecessors, (2030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:56:59,882 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 229.0) internal successors, (5496), 24 states have internal predecessors, (5496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:56:59,883 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 229.0) internal successors, (5496), 24 states have internal predecessors, (5496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:56:59,884 INFO L175 Difference]: Start difference. First operand has 117 places, 114 transitions, 1467 flow. Second operand 23 states and 2030 transitions. [2022-11-23 02:56:59,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 252 transitions, 2502 flow [2022-11-23 02:56:59,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 252 transitions, 2181 flow, removed 62 selfloop flow, removed 13 redundant places. [2022-11-23 02:56:59,928 INFO L231 Difference]: Finished difference. Result has 132 places, 126 transitions, 1539 flow [2022-11-23 02:56:59,929 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=1200, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1539, PETRI_PLACES=132, PETRI_TRANSITIONS=126} [2022-11-23 02:56:59,930 INFO L288 CegarLoopForPetriNet]: 19 programPoint places, 113 predicate places. [2022-11-23 02:56:59,931 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 126 transitions, 1539 flow [2022-11-23 02:56:59,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 82.6470588235294) internal successors, (2810), 34 states have internal predecessors, (2810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:56:59,932 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:56:59,932 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:56:59,944 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f67434aa-aea8-4730-b5a2-13ce5f56a52e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-23 02:57:00,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f67434aa-aea8-4730-b5a2-13ce5f56a52e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:57:00,140 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 02:57:00,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:57:00,140 INFO L85 PathProgramCache]: Analyzing trace with hash -186406107, now seen corresponding path program 12 times [2022-11-23 02:57:00,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:57:00,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327345933] [2022-11-23 02:57:00,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:57:00,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:57:00,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:57:00,287 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-23 02:57:00,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:57:00,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327345933] [2022-11-23 02:57:00,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327345933] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:57:00,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467100135] [2022-11-23 02:57:00,288 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-23 02:57:00,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:57:00,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f67434aa-aea8-4730-b5a2-13ce5f56a52e/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:57:00,289 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f67434aa-aea8-4730-b5a2-13ce5f56a52e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:57:00,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f67434aa-aea8-4730-b5a2-13ce5f56a52e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-23 02:57:00,560 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-23 02:57:00,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:57:00,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-23 02:57:00,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:57:00,593 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-23 02:57:00,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:57:00,660 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-23 02:57:00,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467100135] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:57:00,661 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 02:57:00,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-11-23 02:57:00,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011620515] [2022-11-23 02:57:00,661 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 02:57:00,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 02:57:00,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:57:00,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 02:57:00,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-23 02:57:00,667 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 229 [2022-11-23 02:57:00,668 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 126 transitions, 1539 flow. Second operand has 7 states, 7 states have (on average 106.0) internal successors, (742), 7 states have internal predecessors, (742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:57:00,668 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:57:00,668 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 229 [2022-11-23 02:57:00,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:57:01,570 INFO L130 PetriNetUnfolder]: 2698/4969 cut-off events. [2022-11-23 02:57:01,570 INFO L131 PetriNetUnfolder]: For 18777/18777 co-relation queries the response was YES. [2022-11-23 02:57:01,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17963 conditions, 4969 events. 2698/4969 cut-off events. For 18777/18777 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 34995 event pairs, 453 based on Foata normal form. 24/4993 useless extension candidates. Maximal degree in co-relation 17899. Up to 1446 conditions per place. [2022-11-23 02:57:01,607 INFO L137 encePairwiseOnDemand]: 226/229 looper letters, 95 selfloop transitions, 148 changer transitions 0/243 dead transitions. [2022-11-23 02:57:01,608 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 243 transitions, 3467 flow [2022-11-23 02:57:01,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 02:57:01,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-23 02:57:01,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 671 transitions. [2022-11-23 02:57:01,611 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4883551673944687 [2022-11-23 02:57:01,611 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 671 transitions. [2022-11-23 02:57:01,611 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 671 transitions. [2022-11-23 02:57:01,612 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:57:01,612 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 671 transitions. [2022-11-23 02:57:01,613 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 111.83333333333333) internal successors, (671), 6 states have internal predecessors, (671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:57:01,615 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 229.0) internal successors, (1603), 7 states have internal predecessors, (1603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:57:01,616 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 229.0) internal successors, (1603), 7 states have internal predecessors, (1603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:57:01,616 INFO L175 Difference]: Start difference. First operand has 132 places, 126 transitions, 1539 flow. Second operand 6 states and 671 transitions. [2022-11-23 02:57:01,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 243 transitions, 3467 flow [2022-11-23 02:57:01,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 243 transitions, 3299 flow, removed 28 selfloop flow, removed 12 redundant places. [2022-11-23 02:57:01,698 INFO L231 Difference]: Finished difference. Result has 126 places, 210 transitions, 3013 flow [2022-11-23 02:57:01,698 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=1443, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3013, PETRI_PLACES=126, PETRI_TRANSITIONS=210} [2022-11-23 02:57:01,700 INFO L288 CegarLoopForPetriNet]: 19 programPoint places, 107 predicate places. [2022-11-23 02:57:01,700 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 210 transitions, 3013 flow [2022-11-23 02:57:01,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 106.0) internal successors, (742), 7 states have internal predecessors, (742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:57:01,701 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:57:01,701 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:57:01,714 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f67434aa-aea8-4730-b5a2-13ce5f56a52e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-23 02:57:01,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f67434aa-aea8-4730-b5a2-13ce5f56a52e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:57:01,907 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 02:57:01,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:57:01,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1070799196, now seen corresponding path program 13 times [2022-11-23 02:57:01,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:57:01,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186479385] [2022-11-23 02:57:01,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:57:01,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:57:01,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:57:02,251 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-23 02:57:02,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:57:02,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186479385] [2022-11-23 02:57:02,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186479385] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:57:02,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277136823] [2022-11-23 02:57:02,252 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 02:57:02,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:57:02,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f67434aa-aea8-4730-b5a2-13ce5f56a52e/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:57:02,254 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f67434aa-aea8-4730-b5a2-13ce5f56a52e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:57:02,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f67434aa-aea8-4730-b5a2-13ce5f56a52e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-23 02:57:02,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:57:02,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-23 02:57:02,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:57:02,635 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-23 02:57:02,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:57:02,920 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-23 02:57:02,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277136823] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:57:02,920 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 02:57:02,921 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 28 [2022-11-23 02:57:02,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109096572] [2022-11-23 02:57:02,921 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 02:57:02,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-23 02:57:02,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:57:02,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-23 02:57:02,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=604, Unknown=0, NotChecked=0, Total=812 [2022-11-23 02:57:03,336 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 229 [2022-11-23 02:57:03,338 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 210 transitions, 3013 flow. Second operand has 29 states, 29 states have (on average 94.62068965517241) internal successors, (2744), 29 states have internal predecessors, (2744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:57:03,339 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:57:03,339 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 229 [2022-11-23 02:57:03,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:57:05,019 INFO L130 PetriNetUnfolder]: 3224/6071 cut-off events. [2022-11-23 02:57:05,020 INFO L131 PetriNetUnfolder]: For 19342/19342 co-relation queries the response was YES. [2022-11-23 02:57:05,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23557 conditions, 6071 events. 3224/6071 cut-off events. For 19342/19342 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 46122 event pairs, 1924 based on Foata normal form. 109/6180 useless extension candidates. Maximal degree in co-relation 22563. Up to 4967 conditions per place. [2022-11-23 02:57:05,061 INFO L137 encePairwiseOnDemand]: 224/229 looper letters, 206 selfloop transitions, 5 changer transitions 123/334 dead transitions. [2022-11-23 02:57:05,061 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 334 transitions, 4562 flow [2022-11-23 02:57:05,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-23 02:57:05,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-11-23 02:57:05,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1694 transitions. [2022-11-23 02:57:05,067 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4351399948625739 [2022-11-23 02:57:05,067 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1694 transitions. [2022-11-23 02:57:05,067 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1694 transitions. [2022-11-23 02:57:05,068 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:57:05,069 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1694 transitions. [2022-11-23 02:57:05,072 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 99.6470588235294) internal successors, (1694), 17 states have internal predecessors, (1694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:57:05,077 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 229.0) internal successors, (4122), 18 states have internal predecessors, (4122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:57:05,078 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 229.0) internal successors, (4122), 18 states have internal predecessors, (4122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:57:05,078 INFO L175 Difference]: Start difference. First operand has 126 places, 210 transitions, 3013 flow. Second operand 17 states and 1694 transitions. [2022-11-23 02:57:05,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 334 transitions, 4562 flow [2022-11-23 02:57:05,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 334 transitions, 4468 flow, removed 47 selfloop flow, removed 0 redundant places. [2022-11-23 02:57:05,270 INFO L231 Difference]: Finished difference. Result has 154 places, 211 transitions, 3075 flow [2022-11-23 02:57:05,271 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=2927, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=3075, PETRI_PLACES=154, PETRI_TRANSITIONS=211} [2022-11-23 02:57:05,272 INFO L288 CegarLoopForPetriNet]: 19 programPoint places, 135 predicate places. [2022-11-23 02:57:05,272 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 211 transitions, 3075 flow [2022-11-23 02:57:05,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 94.62068965517241) internal successors, (2744), 29 states have internal predecessors, (2744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:57:05,273 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:57:05,273 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:57:05,287 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f67434aa-aea8-4730-b5a2-13ce5f56a52e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-23 02:57:05,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f67434aa-aea8-4730-b5a2-13ce5f56a52e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-23 02:57:05,480 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 02:57:05,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:57:05,481 INFO L85 PathProgramCache]: Analyzing trace with hash -755556346, now seen corresponding path program 14 times [2022-11-23 02:57:05,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:57:05,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556242574] [2022-11-23 02:57:05,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:57:05,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:57:05,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:57:06,469 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:57:06,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:57:06,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556242574] [2022-11-23 02:57:06,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556242574] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:57:06,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841934392] [2022-11-23 02:57:06,470 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 02:57:06,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:57:06,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f67434aa-aea8-4730-b5a2-13ce5f56a52e/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:57:06,474 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f67434aa-aea8-4730-b5a2-13ce5f56a52e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:57:06,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f67434aa-aea8-4730-b5a2-13ce5f56a52e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-23 02:57:06,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 02:57:06,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:57:06,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-23 02:57:06,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:57:06,904 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-23 02:57:06,910 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-23 02:57:06,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:57:07,067 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-11-23 02:57:07,068 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 13 [2022-11-23 02:57:07,195 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-23 02:57:07,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841934392] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:57:07,196 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 02:57:07,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 9] total 30 [2022-11-23 02:57:07,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486170867] [2022-11-23 02:57:07,196 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 02:57:07,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-23 02:57:07,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:57:07,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-23 02:57:07,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=896, Unknown=0, NotChecked=0, Total=992 [2022-11-23 02:57:07,941 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 229 [2022-11-23 02:57:07,943 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 211 transitions, 3075 flow. Second operand has 32 states, 32 states have (on average 91.875) internal successors, (2940), 32 states have internal predecessors, (2940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:57:07,943 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:57:07,943 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 229 [2022-11-23 02:57:07,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:57:12,434 INFO L130 PetriNetUnfolder]: 3804/6971 cut-off events. [2022-11-23 02:57:12,434 INFO L131 PetriNetUnfolder]: For 28377/28377 co-relation queries the response was YES. [2022-11-23 02:57:12,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27228 conditions, 6971 events. 3804/6971 cut-off events. For 28377/28377 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 51226 event pairs, 147 based on Foata normal form. 16/6987 useless extension candidates. Maximal degree in co-relation 27153. Up to 1505 conditions per place. [2022-11-23 02:57:12,482 INFO L137 encePairwiseOnDemand]: 223/229 looper letters, 217 selfloop transitions, 285 changer transitions 217/719 dead transitions. [2022-11-23 02:57:12,482 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 719 transitions, 6921 flow [2022-11-23 02:57:12,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-11-23 02:57:12,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2022-11-23 02:57:12,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 6666 transitions. [2022-11-23 02:57:12,492 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4280760339070126 [2022-11-23 02:57:12,493 INFO L72 ComplementDD]: Start complementDD. Operand 68 states and 6666 transitions. [2022-11-23 02:57:12,493 INFO L73 IsDeterministic]: Start isDeterministic. Operand 68 states and 6666 transitions. [2022-11-23 02:57:12,496 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:57:12,497 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 68 states and 6666 transitions. [2022-11-23 02:57:12,507 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 69 states, 68 states have (on average 98.02941176470588) internal successors, (6666), 68 states have internal predecessors, (6666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:57:12,522 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 69 states, 69 states have (on average 229.0) internal successors, (15801), 69 states have internal predecessors, (15801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:57:12,526 INFO L81 ComplementDD]: Finished complementDD. Result has 69 states, 69 states have (on average 229.0) internal successors, (15801), 69 states have internal predecessors, (15801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:57:12,526 INFO L175 Difference]: Start difference. First operand has 154 places, 211 transitions, 3075 flow. Second operand 68 states and 6666 transitions. [2022-11-23 02:57:12,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 719 transitions, 6921 flow [2022-11-23 02:57:12,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 719 transitions, 6739 flow, removed 87 selfloop flow, removed 15 redundant places. [2022-11-23 02:57:12,712 INFO L231 Difference]: Finished difference. Result has 211 places, 302 transitions, 5137 flow [2022-11-23 02:57:12,713 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=2935, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=198, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=68, PETRI_FLOW=5137, PETRI_PLACES=211, PETRI_TRANSITIONS=302} [2022-11-23 02:57:12,713 INFO L288 CegarLoopForPetriNet]: 19 programPoint places, 192 predicate places. [2022-11-23 02:57:12,714 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 302 transitions, 5137 flow [2022-11-23 02:57:12,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 91.875) internal successors, (2940), 32 states have internal predecessors, (2940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:57:12,715 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:57:12,715 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:57:12,726 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f67434aa-aea8-4730-b5a2-13ce5f56a52e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-23 02:57:12,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f67434aa-aea8-4730-b5a2-13ce5f56a52e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-23 02:57:12,921 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 02:57:12,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:57:12,921 INFO L85 PathProgramCache]: Analyzing trace with hash 1218342540, now seen corresponding path program 15 times [2022-11-23 02:57:12,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:57:12,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360306689] [2022-11-23 02:57:12,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:57:12,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:57:12,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:57:14,125 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:57:14,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:57:14,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360306689] [2022-11-23 02:57:14,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360306689] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:57:14,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999082721] [2022-11-23 02:57:14,126 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 02:57:14,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:57:14,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f67434aa-aea8-4730-b5a2-13ce5f56a52e/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:57:14,128 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f67434aa-aea8-4730-b5a2-13ce5f56a52e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:57:14,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f67434aa-aea8-4730-b5a2-13ce5f56a52e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-23 02:57:14,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-23 02:57:14,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:57:14,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-23 02:57:14,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:57:14,712 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 02:57:14,776 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 02:57:14,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 02:57:14,989 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 23 [2022-11-23 02:57:15,475 INFO L321 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-11-23 02:57:15,476 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2022-11-23 02:57:15,487 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-23 02:57:15,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:57:16,471 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 02:57:16,472 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 48 [2022-11-23 02:57:16,485 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 02:57:16,485 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 106 treesize of output 103 [2022-11-23 02:57:16,501 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 02:57:16,501 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 61 [2022-11-23 02:57:16,509 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-11-23 02:57:17,023 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-23 02:57:17,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999082721] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:57:17,024 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 02:57:17,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 37 [2022-11-23 02:57:17,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584426490] [2022-11-23 02:57:17,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 02:57:17,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-23 02:57:17,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:57:17,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-23 02:57:17,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1283, Unknown=0, NotChecked=0, Total=1482 [2022-11-23 02:57:19,479 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 02:57:22,858 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:57:24,932 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 02:57:25,382 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 229 [2022-11-23 02:57:25,385 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 302 transitions, 5137 flow. Second operand has 39 states, 39 states have (on average 76.58974358974359) internal successors, (2987), 39 states have internal predecessors, (2987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:57:25,385 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:57:25,385 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 229 [2022-11-23 02:57:25,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:57:37,063 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:57:38,350 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:57:42,439 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:57:44,535 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:57:50,280 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:57:51,688 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:57:53,903 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:57:55,054 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:57:58,536 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:58:01,219 INFO L130 PetriNetUnfolder]: 9461/17350 cut-off events. [2022-11-23 02:58:01,219 INFO L131 PetriNetUnfolder]: For 83663/83663 co-relation queries the response was YES. [2022-11-23 02:58:01,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73924 conditions, 17350 events. 9461/17350 cut-off events. For 83663/83663 co-relation queries the response was YES. Maximal size of possible extension queue 996. Compared 148755 event pairs, 1202 based on Foata normal form. 2/17352 useless extension candidates. Maximal degree in co-relation 72249. Up to 3687 conditions per place. [2022-11-23 02:58:01,417 INFO L137 encePairwiseOnDemand]: 223/229 looper letters, 171 selfloop transitions, 310 changer transitions 615/1096 dead transitions. [2022-11-23 02:58:01,418 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 1096 transitions, 16297 flow [2022-11-23 02:58:01,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-11-23 02:58:01,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2022-11-23 02:58:01,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 4380 transitions. [2022-11-23 02:58:01,426 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.36087995386009725 [2022-11-23 02:58:01,426 INFO L72 ComplementDD]: Start complementDD. Operand 53 states and 4380 transitions. [2022-11-23 02:58:01,427 INFO L73 IsDeterministic]: Start isDeterministic. Operand 53 states and 4380 transitions. [2022-11-23 02:58:01,429 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:58:01,429 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 53 states and 4380 transitions. [2022-11-23 02:58:01,436 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 54 states, 53 states have (on average 82.64150943396227) internal successors, (4380), 53 states have internal predecessors, (4380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:58:01,449 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 54 states, 54 states have (on average 229.0) internal successors, (12366), 54 states have internal predecessors, (12366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:58:01,452 INFO L81 ComplementDD]: Finished complementDD. Result has 54 states, 54 states have (on average 229.0) internal successors, (12366), 54 states have internal predecessors, (12366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:58:01,452 INFO L175 Difference]: Start difference. First operand has 211 places, 302 transitions, 5137 flow. Second operand 53 states and 4380 transitions. [2022-11-23 02:58:01,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 1096 transitions, 16297 flow [2022-11-23 02:58:02,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 1096 transitions, 14243 flow, removed 253 selfloop flow, removed 24 redundant places. [2022-11-23 02:58:02,515 INFO L231 Difference]: Finished difference. Result has 248 places, 418 transitions, 6907 flow [2022-11-23 02:58:02,515 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=4386, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=213, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=53, PETRI_FLOW=6907, PETRI_PLACES=248, PETRI_TRANSITIONS=418} [2022-11-23 02:58:02,516 INFO L288 CegarLoopForPetriNet]: 19 programPoint places, 229 predicate places. [2022-11-23 02:58:02,516 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 418 transitions, 6907 flow [2022-11-23 02:58:02,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 76.58974358974359) internal successors, (2987), 39 states have internal predecessors, (2987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:58:02,516 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:58:02,516 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:58:02,522 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f67434aa-aea8-4730-b5a2-13ce5f56a52e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-23 02:58:02,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f67434aa-aea8-4730-b5a2-13ce5f56a52e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-23 02:58:02,717 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 02:58:02,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:58:02,718 INFO L85 PathProgramCache]: Analyzing trace with hash 147225284, now seen corresponding path program 16 times [2022-11-23 02:58:02,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:58:02,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722043362] [2022-11-23 02:58:02,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:58:02,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:58:02,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:58:02,896 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-23 02:58:02,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:58:02,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722043362] [2022-11-23 02:58:02,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722043362] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:58:02,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107072421] [2022-11-23 02:58:02,897 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 02:58:02,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:58:02,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f67434aa-aea8-4730-b5a2-13ce5f56a52e/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:58:02,902 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f67434aa-aea8-4730-b5a2-13ce5f56a52e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:58:02,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f67434aa-aea8-4730-b5a2-13ce5f56a52e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-23 02:58:03,054 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 02:58:03,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:58:03,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-23 02:58:03,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:58:03,104 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-23 02:58:03,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:58:03,194 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-23 02:58:03,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107072421] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:58:03,194 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 02:58:03,194 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 7 [2022-11-23 02:58:03,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560702888] [2022-11-23 02:58:03,195 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 02:58:03,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 02:58:03,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:58:03,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 02:58:03,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2022-11-23 02:58:03,198 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 229 [2022-11-23 02:58:03,199 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 418 transitions, 6907 flow. Second operand has 8 states, 8 states have (on average 105.75) internal successors, (846), 8 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:58:03,199 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:58:03,199 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 229 [2022-11-23 02:58:03,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:58:07,534 INFO L130 PetriNetUnfolder]: 8656/15832 cut-off events. [2022-11-23 02:58:07,534 INFO L131 PetriNetUnfolder]: For 100694/100694 co-relation queries the response was YES. [2022-11-23 02:58:07,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66693 conditions, 15832 events. 8656/15832 cut-off events. For 100694/100694 co-relation queries the response was YES. Maximal size of possible extension queue 943. Compared 133734 event pairs, 1210 based on Foata normal form. 24/15856 useless extension candidates. Maximal degree in co-relation 66590. Up to 4193 conditions per place. [2022-11-23 02:58:07,710 INFO L137 encePairwiseOnDemand]: 226/229 looper letters, 183 selfloop transitions, 507 changer transitions 0/690 dead transitions. [2022-11-23 02:58:07,710 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 690 transitions, 12995 flow [2022-11-23 02:58:07,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 02:58:07,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-23 02:58:07,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 784 transitions. [2022-11-23 02:58:07,713 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4890829694323144 [2022-11-23 02:58:07,713 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 784 transitions. [2022-11-23 02:58:07,713 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 784 transitions. [2022-11-23 02:58:07,714 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:58:07,714 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 784 transitions. [2022-11-23 02:58:07,715 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 112.0) internal successors, (784), 7 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:58:07,717 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 229.0) internal successors, (1832), 8 states have internal predecessors, (1832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:58:07,718 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 229.0) internal successors, (1832), 8 states have internal predecessors, (1832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:58:07,718 INFO L175 Difference]: Start difference. First operand has 248 places, 418 transitions, 6907 flow. Second operand 7 states and 784 transitions. [2022-11-23 02:58:07,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 690 transitions, 12995 flow [2022-11-23 02:58:08,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 690 transitions, 12421 flow, removed 230 selfloop flow, removed 14 redundant places. [2022-11-23 02:58:08,513 INFO L231 Difference]: Finished difference. Result has 223 places, 649 transitions, 12017 flow [2022-11-23 02:58:08,514 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=6503, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=339, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12017, PETRI_PLACES=223, PETRI_TRANSITIONS=649} [2022-11-23 02:58:08,515 INFO L288 CegarLoopForPetriNet]: 19 programPoint places, 204 predicate places. [2022-11-23 02:58:08,515 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 649 transitions, 12017 flow [2022-11-23 02:58:08,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 105.75) internal successors, (846), 8 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:58:08,516 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:58:08,516 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:58:08,529 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f67434aa-aea8-4730-b5a2-13ce5f56a52e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-23 02:58:08,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f67434aa-aea8-4730-b5a2-13ce5f56a52e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:58:08,723 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 02:58:08,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:58:08,723 INFO L85 PathProgramCache]: Analyzing trace with hash -31577955, now seen corresponding path program 17 times [2022-11-23 02:58:08,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:58:08,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167702246] [2022-11-23 02:58:08,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:58:08,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:58:08,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:58:09,727 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:58:09,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:58:09,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167702246] [2022-11-23 02:58:09,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167702246] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:58:09,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398062199] [2022-11-23 02:58:09,728 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-23 02:58:09,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:58:09,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f67434aa-aea8-4730-b5a2-13ce5f56a52e/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:58:09,730 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f67434aa-aea8-4730-b5a2-13ce5f56a52e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:58:09,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f67434aa-aea8-4730-b5a2-13ce5f56a52e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-23 02:58:09,884 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-23 02:58:09,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:58:09,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-23 02:58:09,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:58:10,403 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-23 02:58:10,425 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 02:58:10,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:58:10,607 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-11-23 02:58:10,607 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 13 [2022-11-23 02:58:10,821 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-23 02:58:10,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398062199] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:58:10,822 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 02:58:10,822 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 10] total 40 [2022-11-23 02:58:10,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761436772] [2022-11-23 02:58:10,823 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 02:58:10,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-23 02:58:10,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:58:10,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-23 02:58:10,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1586, Unknown=0, NotChecked=0, Total=1722 [2022-11-23 02:58:12,061 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 229 [2022-11-23 02:58:12,063 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 649 transitions, 12017 flow. Second operand has 42 states, 42 states have (on average 91.5) internal successors, (3843), 42 states have internal predecessors, (3843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:58:12,063 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:58:12,063 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 229 [2022-11-23 02:58:12,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:58:26,525 INFO L130 PetriNetUnfolder]: 11424/20844 cut-off events. [2022-11-23 02:58:26,526 INFO L131 PetriNetUnfolder]: For 134720/134720 co-relation queries the response was YES. [2022-11-23 02:58:26,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93340 conditions, 20844 events. 11424/20844 cut-off events. For 134720/134720 co-relation queries the response was YES. Maximal size of possible extension queue 1233. Compared 182133 event pairs, 509 based on Foata normal form. 18/20862 useless extension candidates. Maximal degree in co-relation 93248. Up to 5903 conditions per place. [2022-11-23 02:58:26,747 INFO L137 encePairwiseOnDemand]: 223/229 looper letters, 395 selfloop transitions, 868 changer transitions 502/1765 dead transitions. [2022-11-23 02:58:26,747 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 1765 transitions, 22001 flow [2022-11-23 02:58:26,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2022-11-23 02:58:26,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2022-11-23 02:58:26,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 13821 transitions. [2022-11-23 02:58:26,772 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4280405091517235 [2022-11-23 02:58:26,772 INFO L72 ComplementDD]: Start complementDD. Operand 141 states and 13821 transitions. [2022-11-23 02:58:26,772 INFO L73 IsDeterministic]: Start isDeterministic. Operand 141 states and 13821 transitions. [2022-11-23 02:58:26,777 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:58:26,778 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 141 states and 13821 transitions. [2022-11-23 02:58:26,798 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 142 states, 141 states have (on average 98.02127659574468) internal successors, (13821), 141 states have internal predecessors, (13821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:58:26,827 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 142 states, 142 states have (on average 229.0) internal successors, (32518), 142 states have internal predecessors, (32518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:58:26,833 INFO L81 ComplementDD]: Finished complementDD. Result has 142 states, 142 states have (on average 229.0) internal successors, (32518), 142 states have internal predecessors, (32518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:58:26,833 INFO L175 Difference]: Start difference. First operand has 223 places, 649 transitions, 12017 flow. Second operand 141 states and 13821 transitions. [2022-11-23 02:58:26,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 1765 transitions, 22001 flow [2022-11-23 02:58:27,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 1765 transitions, 21101 flow, removed 450 selfloop flow, removed 0 redundant places. [2022-11-23 02:58:27,990 INFO L231 Difference]: Finished difference. Result has 382 places, 886 transitions, 18074 flow [2022-11-23 02:58:27,991 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=11453, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=649, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=635, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=141, PETRI_FLOW=18074, PETRI_PLACES=382, PETRI_TRANSITIONS=886} [2022-11-23 02:58:27,991 INFO L288 CegarLoopForPetriNet]: 19 programPoint places, 363 predicate places. [2022-11-23 02:58:27,991 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 886 transitions, 18074 flow [2022-11-23 02:58:27,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 91.5) internal successors, (3843), 42 states have internal predecessors, (3843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:58:27,992 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:58:27,992 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:58:27,997 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f67434aa-aea8-4730-b5a2-13ce5f56a52e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-11-23 02:58:28,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f67434aa-aea8-4730-b5a2-13ce5f56a52e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:58:28,193 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 02:58:28,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:58:28,193 INFO L85 PathProgramCache]: Analyzing trace with hash 756174589, now seen corresponding path program 18 times [2022-11-23 02:58:28,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:58:28,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569524914] [2022-11-23 02:58:28,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:58:28,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:58:28,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:58:29,350 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:58:29,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:58:29,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569524914] [2022-11-23 02:58:29,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569524914] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:58:29,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607533403] [2022-11-23 02:58:29,351 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-23 02:58:29,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:58:29,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f67434aa-aea8-4730-b5a2-13ce5f56a52e/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:58:29,353 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f67434aa-aea8-4730-b5a2-13ce5f56a52e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:58:29,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f67434aa-aea8-4730-b5a2-13ce5f56a52e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-23 02:58:29,753 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-11-23 02:58:29,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:58:29,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-23 02:58:29,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:58:30,825 INFO L321 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-11-23 02:58:30,826 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2022-11-23 02:58:30,836 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 11 proven. 24 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-23 02:58:30,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:58:31,425 INFO L321 Elim1Store]: treesize reduction 5, result has 68.8 percent of original size [2022-11-23 02:58:31,425 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2022-11-23 02:58:31,900 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 29 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-23 02:58:31,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607533403] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:58:31,900 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 02:58:31,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13, 13] total 41 [2022-11-23 02:58:31,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875044880] [2022-11-23 02:58:31,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 02:58:31,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-23 02:58:31,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:58:31,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-23 02:58:31,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=1542, Unknown=0, NotChecked=0, Total=1806 [2022-11-23 02:58:33,890 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 229 [2022-11-23 02:58:33,892 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 886 transitions, 18074 flow. Second operand has 43 states, 43 states have (on average 86.6046511627907) internal successors, (3724), 43 states have internal predecessors, (3724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:58:33,892 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:58:33,892 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 229 [2022-11-23 02:58:33,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:59:01,110 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-11-23 02:59:44,387 INFO L130 PetriNetUnfolder]: 35355/64569 cut-off events. [2022-11-23 02:59:44,387 INFO L131 PetriNetUnfolder]: For 522418/522418 co-relation queries the response was YES. [2022-11-23 02:59:45,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 310843 conditions, 64569 events. 35355/64569 cut-off events. For 522418/522418 co-relation queries the response was YES. Maximal size of possible extension queue 3694. Compared 662266 event pairs, 5934 based on Foata normal form. 12/64581 useless extension candidates. Maximal degree in co-relation 304473. Up to 13422 conditions per place. [2022-11-23 02:59:45,469 INFO L137 encePairwiseOnDemand]: 222/229 looper letters, 682 selfloop transitions, 766 changer transitions 2487/3935 dead transitions. [2022-11-23 02:59:45,470 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 561 places, 3935 transitions, 69914 flow [2022-11-23 02:59:45,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 180 states. [2022-11-23 02:59:45,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2022-11-23 02:59:45,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 16771 transitions. [2022-11-23 02:59:45,514 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4068655992236778 [2022-11-23 02:59:45,514 INFO L72 ComplementDD]: Start complementDD. Operand 180 states and 16771 transitions. [2022-11-23 02:59:45,515 INFO L73 IsDeterministic]: Start isDeterministic. Operand 180 states and 16771 transitions. [2022-11-23 02:59:45,523 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:59:45,523 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 180 states and 16771 transitions. [2022-11-23 02:59:45,568 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 181 states, 180 states have (on average 93.17222222222222) internal successors, (16771), 180 states have internal predecessors, (16771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:59:45,619 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 181 states, 181 states have (on average 229.0) internal successors, (41449), 181 states have internal predecessors, (41449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:59:45,628 INFO L81 ComplementDD]: Finished complementDD. Result has 181 states, 181 states have (on average 229.0) internal successors, (41449), 181 states have internal predecessors, (41449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:59:45,628 INFO L175 Difference]: Start difference. First operand has 382 places, 886 transitions, 18074 flow. Second operand 180 states and 16771 transitions. [2022-11-23 02:59:45,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 561 places, 3935 transitions, 69914 flow [2022-11-23 02:59:58,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 528 places, 3935 transitions, 62409 flow, removed 774 selfloop flow, removed 33 redundant places. [2022-11-23 02:59:58,365 INFO L231 Difference]: Finished difference. Result has 568 places, 1076 transitions, 22187 flow [2022-11-23 02:59:58,366 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=15750, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=886, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=600, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=180, PETRI_FLOW=22187, PETRI_PLACES=568, PETRI_TRANSITIONS=1076} [2022-11-23 02:59:58,366 INFO L288 CegarLoopForPetriNet]: 19 programPoint places, 549 predicate places. [2022-11-23 02:59:58,366 INFO L495 AbstractCegarLoop]: Abstraction has has 568 places, 1076 transitions, 22187 flow [2022-11-23 02:59:58,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 86.6046511627907) internal successors, (3724), 43 states have internal predecessors, (3724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:59:58,367 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:59:58,367 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:59:58,374 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f67434aa-aea8-4730-b5a2-13ce5f56a52e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-11-23 02:59:58,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f67434aa-aea8-4730-b5a2-13ce5f56a52e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:59:58,567 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 02:59:58,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:59:58,568 INFO L85 PathProgramCache]: Analyzing trace with hash 180715615, now seen corresponding path program 19 times [2022-11-23 02:59:58,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:59:58,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077265638] [2022-11-23 02:59:58,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:59:58,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:59:58,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:59:59,707 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:59:59,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:59:59,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077265638] [2022-11-23 02:59:59,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077265638] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:59:59,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953652] [2022-11-23 02:59:59,709 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 02:59:59,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:59:59,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f67434aa-aea8-4730-b5a2-13ce5f56a52e/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:59:59,710 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f67434aa-aea8-4730-b5a2-13ce5f56a52e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:59:59,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f67434aa-aea8-4730-b5a2-13ce5f56a52e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-23 02:59:59,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:59:59,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 59 conjunts are in the unsatisfiable core [2022-11-23 02:59:59,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:00:00,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:00:00,504 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-11-23 03:00:00,768 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-23 03:00:00,782 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:00:00,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:00:01,293 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 03:00:01,293 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 37 [2022-11-23 03:00:01,308 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-11-23 03:00:02,207 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 15 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:00:02,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953652] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:00:02,208 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:00:02,208 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 52 [2022-11-23 03:00:02,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871762268] [2022-11-23 03:00:02,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:00:02,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-11-23 03:00:02,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:00:02,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-11-23 03:00:02,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=2657, Unknown=7, NotChecked=0, Total=2862 [2022-11-23 03:00:04,737 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 229 [2022-11-23 03:00:04,740 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 568 places, 1076 transitions, 22187 flow. Second operand has 54 states, 54 states have (on average 76.24074074074075) internal successors, (4117), 54 states have internal predecessors, (4117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:00:04,740 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:00:04,740 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 229 [2022-11-23 03:00:04,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:00:20,462 INFO L130 PetriNetUnfolder]: 13700/25068 cut-off events. [2022-11-23 03:00:20,463 INFO L131 PetriNetUnfolder]: For 640441/640441 co-relation queries the response was YES. [2022-11-23 03:00:20,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 149385 conditions, 25068 events. 13700/25068 cut-off events. For 640441/640441 co-relation queries the response was YES. Maximal size of possible extension queue 1457. Compared 224660 event pairs, 621 based on Foata normal form. 13/25081 useless extension candidates. Maximal degree in co-relation 148714. Up to 5202 conditions per place. [2022-11-23 03:00:20,993 INFO L137 encePairwiseOnDemand]: 223/229 looper letters, 205 selfloop transitions, 1038 changer transitions 173/1416 dead transitions. [2022-11-23 03:00:20,993 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 565 places, 1416 transitions, 27543 flow [2022-11-23 03:00:20,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-11-23 03:00:20,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2022-11-23 03:00:20,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 4612 transitions. [2022-11-23 03:00:21,000 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.35963817841547097 [2022-11-23 03:00:21,000 INFO L72 ComplementDD]: Start complementDD. Operand 56 states and 4612 transitions. [2022-11-23 03:00:21,001 INFO L73 IsDeterministic]: Start isDeterministic. Operand 56 states and 4612 transitions. [2022-11-23 03:00:21,002 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:00:21,003 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 56 states and 4612 transitions. [2022-11-23 03:00:21,009 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 57 states, 56 states have (on average 82.35714285714286) internal successors, (4612), 56 states have internal predecessors, (4612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:00:21,019 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 57 states, 57 states have (on average 229.0) internal successors, (13053), 57 states have internal predecessors, (13053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:00:21,022 INFO L81 ComplementDD]: Finished complementDD. Result has 57 states, 57 states have (on average 229.0) internal successors, (13053), 57 states have internal predecessors, (13053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:00:21,022 INFO L175 Difference]: Start difference. First operand has 568 places, 1076 transitions, 22187 flow. Second operand 56 states and 4612 transitions. [2022-11-23 03:00:21,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 565 places, 1416 transitions, 27543 flow [2022-11-23 03:00:36,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 511 places, 1416 transitions, 25301 flow, removed 938 selfloop flow, removed 54 redundant places. [2022-11-23 03:00:36,055 INFO L231 Difference]: Finished difference. Result has 512 places, 1091 transitions, 22511 flow [2022-11-23 03:00:36,055 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=20086, PETRI_DIFFERENCE_MINUEND_PLACES=456, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1076, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1018, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=56, PETRI_FLOW=22511, PETRI_PLACES=512, PETRI_TRANSITIONS=1091} [2022-11-23 03:00:36,056 INFO L288 CegarLoopForPetriNet]: 19 programPoint places, 493 predicate places. [2022-11-23 03:00:36,056 INFO L495 AbstractCegarLoop]: Abstraction has has 512 places, 1091 transitions, 22511 flow [2022-11-23 03:00:36,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 76.24074074074075) internal successors, (4117), 54 states have internal predecessors, (4117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:00:36,057 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:00:36,058 INFO L209 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:00:36,071 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f67434aa-aea8-4730-b5a2-13ce5f56a52e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-23 03:00:36,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f67434aa-aea8-4730-b5a2-13ce5f56a52e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:00:36,265 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 03:00:36,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:00:36,265 INFO L85 PathProgramCache]: Analyzing trace with hash 1026224840, now seen corresponding path program 20 times [2022-11-23 03:00:36,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:00:36,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846469440] [2022-11-23 03:00:36,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:00:36,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:00:36,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:00:36,803 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 25 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-23 03:00:36,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:00:36,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846469440] [2022-11-23 03:00:36,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846469440] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:00:36,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459186130] [2022-11-23 03:00:36,804 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 03:00:36,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:00:36,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f67434aa-aea8-4730-b5a2-13ce5f56a52e/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:00:36,805 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f67434aa-aea8-4730-b5a2-13ce5f56a52e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:00:36,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f67434aa-aea8-4730-b5a2-13ce5f56a52e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-23 03:00:36,954 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 03:00:36,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:00:36,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-23 03:00:36,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:00:37,430 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 30 proven. 17 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-23 03:00:37,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:00:37,979 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 26 proven. 20 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-23 03:00:37,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459186130] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:00:37,979 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:00:37,979 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 14] total 41 [2022-11-23 03:00:37,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534681802] [2022-11-23 03:00:37,980 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:00:37,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-23 03:00:37,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:00:37,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-23 03:00:37,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=414, Invalid=1308, Unknown=0, NotChecked=0, Total=1722 [2022-11-23 03:00:38,587 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 229 [2022-11-23 03:00:38,590 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 512 places, 1091 transitions, 22511 flow. Second operand has 42 states, 42 states have (on average 94.52380952380952) internal successors, (3970), 42 states have internal predecessors, (3970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:00:38,590 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:00:38,590 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 229 [2022-11-23 03:00:38,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:00:50,099 INFO L130 PetriNetUnfolder]: 13044/23870 cut-off events. [2022-11-23 03:00:50,099 INFO L131 PetriNetUnfolder]: For 516307/516307 co-relation queries the response was YES. [2022-11-23 03:00:50,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141959 conditions, 23870 events. 13044/23870 cut-off events. For 516307/516307 co-relation queries the response was YES. Maximal size of possible extension queue 1346. Compared 219342 event pairs, 8860 based on Foata normal form. 26/23896 useless extension candidates. Maximal degree in co-relation 141804. Up to 23513 conditions per place. [2022-11-23 03:00:50,567 INFO L137 encePairwiseOnDemand]: 224/229 looper letters, 1018 selfloop transitions, 7 changer transitions 88/1113 dead transitions. [2022-11-23 03:00:50,567 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 504 places, 1113 transitions, 24320 flow [2022-11-23 03:00:50,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-23 03:00:50,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-11-23 03:00:50,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1880 transitions. [2022-11-23 03:00:50,571 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4320845782578718 [2022-11-23 03:00:50,571 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1880 transitions. [2022-11-23 03:00:50,571 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1880 transitions. [2022-11-23 03:00:50,572 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:00:50,572 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1880 transitions. [2022-11-23 03:00:50,574 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 98.94736842105263) internal successors, (1880), 19 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:00:50,578 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 229.0) internal successors, (4580), 20 states have internal predecessors, (4580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:00:50,579 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 229.0) internal successors, (4580), 20 states have internal predecessors, (4580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:00:50,580 INFO L175 Difference]: Start difference. First operand has 512 places, 1091 transitions, 22511 flow. Second operand 19 states and 1880 transitions. [2022-11-23 03:00:50,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 504 places, 1113 transitions, 24320 flow [2022-11-23 03:01:05,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 456 places, 1113 transitions, 23485 flow, removed 149 selfloop flow, removed 48 redundant places. [2022-11-23 03:01:05,995 INFO L231 Difference]: Finished difference. Result has 457 places, 1025 transitions, 20947 flow [2022-11-23 03:01:05,996 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=21080, PETRI_DIFFERENCE_MINUEND_PLACES=438, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1039, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1032, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=20947, PETRI_PLACES=457, PETRI_TRANSITIONS=1025} [2022-11-23 03:01:05,996 INFO L288 CegarLoopForPetriNet]: 19 programPoint places, 438 predicate places. [2022-11-23 03:01:05,997 INFO L495 AbstractCegarLoop]: Abstraction has has 457 places, 1025 transitions, 20947 flow [2022-11-23 03:01:05,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 94.52380952380952) internal successors, (3970), 42 states have internal predecessors, (3970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:01:05,997 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:01:05,997 INFO L209 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:01:06,003 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f67434aa-aea8-4730-b5a2-13ce5f56a52e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-23 03:01:06,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f67434aa-aea8-4730-b5a2-13ce5f56a52e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:01:06,198 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 03:01:06,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:01:06,198 INFO L85 PathProgramCache]: Analyzing trace with hash 1832408669, now seen corresponding path program 21 times [2022-11-23 03:01:06,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:01:06,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302966300] [2022-11-23 03:01:06,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:01:06,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:01:06,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:01:06,463 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-23 03:01:06,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:01:06,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302966300] [2022-11-23 03:01:06,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302966300] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:01:06,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15386358] [2022-11-23 03:01:06,464 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 03:01:06,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:01:06,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f67434aa-aea8-4730-b5a2-13ce5f56a52e/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:01:06,466 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f67434aa-aea8-4730-b5a2-13ce5f56a52e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:01:06,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f67434aa-aea8-4730-b5a2-13ce5f56a52e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-23 03:01:06,871 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-23 03:01:06,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:01:06,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-23 03:01:06,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:01:06,919 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-23 03:01:06,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:01:07,015 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-23 03:01:07,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15386358] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:01:07,015 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:01:07,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 8 [2022-11-23 03:01:07,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199775323] [2022-11-23 03:01:07,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:01:07,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-23 03:01:07,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:01:07,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-23 03:01:07,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-11-23 03:01:07,021 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 229 [2022-11-23 03:01:07,022 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 457 places, 1025 transitions, 20947 flow. Second operand has 9 states, 9 states have (on average 105.33333333333333) internal successors, (948), 9 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:01:07,022 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:01:07,022 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 229 [2022-11-23 03:01:07,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:01:23,382 INFO L130 PetriNetUnfolder]: 21426/39016 cut-off events. [2022-11-23 03:01:23,383 INFO L131 PetriNetUnfolder]: For 479529/479529 co-relation queries the response was YES. [2022-11-23 03:01:23,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 214648 conditions, 39016 events. 21426/39016 cut-off events. For 479529/479529 co-relation queries the response was YES. Maximal size of possible extension queue 2232. Compared 371372 event pairs, 2655 based on Foata normal form. 18/39034 useless extension candidates. Maximal degree in co-relation 214536. Up to 9658 conditions per place. [2022-11-23 03:01:23,985 INFO L137 encePairwiseOnDemand]: 226/229 looper letters, 350 selfloop transitions, 1261 changer transitions 0/1611 dead transitions. [2022-11-23 03:01:23,985 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 1611 transitions, 37398 flow [2022-11-23 03:01:23,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-23 03:01:23,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-23 03:01:23,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 897 transitions. [2022-11-23 03:01:23,987 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4896288209606987 [2022-11-23 03:01:23,987 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 897 transitions. [2022-11-23 03:01:23,987 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 897 transitions. [2022-11-23 03:01:23,987 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:01:23,988 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 897 transitions. [2022-11-23 03:01:23,988 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 112.125) internal successors, (897), 8 states have internal predecessors, (897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:01:23,989 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 229.0) internal successors, (2061), 9 states have internal predecessors, (2061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:01:23,989 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 229.0) internal successors, (2061), 9 states have internal predecessors, (2061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:01:23,990 INFO L175 Difference]: Start difference. First operand has 457 places, 1025 transitions, 20947 flow. Second operand 8 states and 897 transitions. [2022-11-23 03:01:23,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 1611 transitions, 37398 flow [2022-11-23 03:01:29,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 1611 transitions, 37256 flow, removed 63 selfloop flow, removed 16 redundant places. [2022-11-23 03:01:29,958 INFO L231 Difference]: Finished difference. Result has 425 places, 1562 transitions, 36765 flow [2022-11-23 03:01:29,959 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=20913, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1025, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=867, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=36765, PETRI_PLACES=425, PETRI_TRANSITIONS=1562} [2022-11-23 03:01:29,960 INFO L288 CegarLoopForPetriNet]: 19 programPoint places, 406 predicate places. [2022-11-23 03:01:29,960 INFO L495 AbstractCegarLoop]: Abstraction has has 425 places, 1562 transitions, 36765 flow [2022-11-23 03:01:29,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 105.33333333333333) internal successors, (948), 9 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:01:29,961 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:01:29,961 INFO L209 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:01:29,968 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f67434aa-aea8-4730-b5a2-13ce5f56a52e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-23 03:01:30,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f67434aa-aea8-4730-b5a2-13ce5f56a52e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-23 03:01:30,168 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 03:01:30,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:01:30,168 INFO L85 PathProgramCache]: Analyzing trace with hash 1822502240, now seen corresponding path program 22 times [2022-11-23 03:01:30,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:01:30,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220120280] [2022-11-23 03:01:30,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:01:30,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:01:30,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:01:31,047 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-23 03:01:31,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:01:31,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220120280] [2022-11-23 03:01:31,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220120280] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:01:31,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538795268] [2022-11-23 03:01:31,048 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 03:01:31,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:01:31,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f67434aa-aea8-4730-b5a2-13ce5f56a52e/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:01:31,049 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f67434aa-aea8-4730-b5a2-13ce5f56a52e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:01:31,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f67434aa-aea8-4730-b5a2-13ce5f56a52e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-23 03:01:31,227 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 03:01:31,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:01:31,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 54 conjunts are in the unsatisfiable core [2022-11-23 03:01:31,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:01:31,943 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-23 03:01:31,954 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 03:01:31,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:01:32,167 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-11-23 03:01:32,167 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 13 [2022-11-23 03:01:32,379 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-23 03:01:32,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538795268] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:01:32,379 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:01:32,379 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 19, 12] total 42 [2022-11-23 03:01:32,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396051040] [2022-11-23 03:01:32,380 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:01:32,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-11-23 03:01:32,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:01:32,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-11-23 03:01:32,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1754, Unknown=0, NotChecked=0, Total=1892 [2022-11-23 03:01:33,581 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 229 [2022-11-23 03:01:33,584 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 1562 transitions, 36765 flow. Second operand has 44 states, 44 states have (on average 91.47727272727273) internal successors, (4025), 44 states have internal predecessors, (4025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:01:33,585 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:01:33,585 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 229 [2022-11-23 03:01:33,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:02:12,698 INFO L130 PetriNetUnfolder]: 27568/50148 cut-off events. [2022-11-23 03:02:12,698 INFO L131 PetriNetUnfolder]: For 527463/527463 co-relation queries the response was YES. [2022-11-23 03:02:13,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 259104 conditions, 50148 events. 27568/50148 cut-off events. For 527463/527463 co-relation queries the response was YES. Maximal size of possible extension queue 2836. Compared 492069 event pairs, 1517 based on Foata normal form. 12/50160 useless extension candidates. Maximal degree in co-relation 258989. Up to 13482 conditions per place. [2022-11-23 03:02:13,420 INFO L137 encePairwiseOnDemand]: 223/229 looper letters, 517 selfloop transitions, 2006 changer transitions 653/3176 dead transitions. [2022-11-23 03:02:13,420 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 606 places, 3176 transitions, 56469 flow [2022-11-23 03:02:13,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 182 states. [2022-11-23 03:02:13,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2022-11-23 03:02:13,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 17841 transitions. [2022-11-23 03:02:13,440 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42806756562215076 [2022-11-23 03:02:13,440 INFO L72 ComplementDD]: Start complementDD. Operand 182 states and 17841 transitions. [2022-11-23 03:02:13,440 INFO L73 IsDeterministic]: Start isDeterministic. Operand 182 states and 17841 transitions. [2022-11-23 03:02:13,447 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:02:13,447 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 182 states and 17841 transitions. [2022-11-23 03:02:13,469 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 183 states, 182 states have (on average 98.02747252747253) internal successors, (17841), 182 states have internal predecessors, (17841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:02:13,505 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 183 states, 183 states have (on average 229.0) internal successors, (41907), 183 states have internal predecessors, (41907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:02:13,513 INFO L81 ComplementDD]: Finished complementDD. Result has 183 states, 183 states have (on average 229.0) internal successors, (41907), 183 states have internal predecessors, (41907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:02:13,513 INFO L175 Difference]: Start difference. First operand has 425 places, 1562 transitions, 36765 flow. Second operand 182 states and 17841 transitions. [2022-11-23 03:02:13,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 606 places, 3176 transitions, 56469 flow