./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_71-funloop_racing.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5372df-1450-4794-aaf3-26ff7febfb1a/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5372df-1450-4794-aaf3-26ff7febfb1a/bin/uautomizer-Dbtcem3rbc/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5372df-1450-4794-aaf3-26ff7febfb1a/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5372df-1450-4794-aaf3-26ff7febfb1a/bin/uautomizer-Dbtcem3rbc/config/AutomizerReach.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_71-funloop_racing.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5372df-1450-4794-aaf3-26ff7febfb1a/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5372df-1450-4794-aaf3-26ff7febfb1a/bin/uautomizer-Dbtcem3rbc --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 bde6fe221f69c3fccb0f7c90e011f0b13ab5ca582ddcd328a459cbb512a8fd7f --- 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-5e519f3 [2022-11-02 20:53:59,238 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 20:53:59,240 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 20:53:59,281 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 20:53:59,281 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 20:53:59,285 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 20:53:59,288 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 20:53:59,292 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 20:53:59,294 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 20:53:59,299 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 20:53:59,300 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 20:53:59,303 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 20:53:59,303 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 20:53:59,307 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 20:53:59,309 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 20:53:59,311 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 20:53:59,312 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 20:53:59,313 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 20:53:59,315 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 20:53:59,316 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 20:53:59,318 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 20:53:59,328 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 20:53:59,329 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 20:53:59,331 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 20:53:59,334 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 20:53:59,339 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 20:53:59,339 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 20:53:59,340 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 20:53:59,342 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 20:53:59,343 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 20:53:59,344 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 20:53:59,345 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 20:53:59,346 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 20:53:59,347 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 20:53:59,349 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 20:53:59,350 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 20:53:59,350 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 20:53:59,351 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 20:53:59,351 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 20:53:59,352 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 20:53:59,353 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 20:53:59,353 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5372df-1450-4794-aaf3-26ff7febfb1a/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-02 20:53:59,393 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 20:53:59,396 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 20:53:59,397 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 20:53:59,397 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 20:53:59,398 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 20:53:59,398 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 20:53:59,399 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 20:53:59,399 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 20:53:59,399 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 20:53:59,399 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 20:53:59,401 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-02 20:53:59,401 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 20:53:59,401 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-02 20:53:59,401 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 20:53:59,401 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-02 20:53:59,402 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 20:53:59,402 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-02 20:53:59,402 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-02 20:53:59,402 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-02 20:53:59,402 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 20:53:59,403 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-02 20:53:59,403 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 20:53:59,403 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 20:53:59,403 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 20:53:59,404 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:53:59,404 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 20:53:59,404 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 20:53:59,404 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-02 20:53:59,404 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 20:53:59,405 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-02 20:53:59,405 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-02 20:53:59,405 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-02 20:53:59,405 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-02 20:53:59,406 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5372df-1450-4794-aaf3-26ff7febfb1a/bin/uautomizer-Dbtcem3rbc/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5372df-1450-4794-aaf3-26ff7febfb1a/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bde6fe221f69c3fccb0f7c90e011f0b13ab5ca582ddcd328a459cbb512a8fd7f [2022-11-02 20:53:59,718 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 20:53:59,752 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 20:53:59,755 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 20:53:59,756 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 20:53:59,757 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 20:53:59,759 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5372df-1450-4794-aaf3-26ff7febfb1a/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/goblint-regression/28-race_reach_71-funloop_racing.i [2022-11-02 20:53:59,836 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5372df-1450-4794-aaf3-26ff7febfb1a/bin/uautomizer-Dbtcem3rbc/data/4a76397f3/dc29e3fe77cd488597a8f7b7ed27838e/FLAG0a57d75dd [2022-11-02 20:54:00,467 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 20:54:00,467 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5372df-1450-4794-aaf3-26ff7febfb1a/sv-benchmarks/c/goblint-regression/28-race_reach_71-funloop_racing.i [2022-11-02 20:54:00,483 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5372df-1450-4794-aaf3-26ff7febfb1a/bin/uautomizer-Dbtcem3rbc/data/4a76397f3/dc29e3fe77cd488597a8f7b7ed27838e/FLAG0a57d75dd [2022-11-02 20:54:00,693 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5372df-1450-4794-aaf3-26ff7febfb1a/bin/uautomizer-Dbtcem3rbc/data/4a76397f3/dc29e3fe77cd488597a8f7b7ed27838e [2022-11-02 20:54:00,696 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 20:54:00,698 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 20:54:00,699 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 20:54:00,700 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 20:54:00,704 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 20:54:00,704 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:54:00" (1/1) ... [2022-11-02 20:54:00,706 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3cd00f1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:54:00, skipping insertion in model container [2022-11-02 20:54:00,706 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:54:00" (1/1) ... [2022-11-02 20:54:00,714 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 20:54:00,758 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 20:54:01,392 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5372df-1450-4794-aaf3-26ff7febfb1a/sv-benchmarks/c/goblint-regression/28-race_reach_71-funloop_racing.i[41323,41336] [2022-11-02 20:54:01,435 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:54:01,459 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 20:54:01,516 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5372df-1450-4794-aaf3-26ff7febfb1a/sv-benchmarks/c/goblint-regression/28-race_reach_71-funloop_racing.i[41323,41336] [2022-11-02 20:54:01,530 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:54:01,602 INFO L208 MainTranslator]: Completed translation [2022-11-02 20:54:01,602 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:54:01 WrapperNode [2022-11-02 20:54:01,602 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 20:54:01,604 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 20:54:01,604 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 20:54:01,604 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 20:54:01,612 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:54:01" (1/1) ... [2022-11-02 20:54:01,640 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:54:01" (1/1) ... [2022-11-02 20:54:01,693 INFO L138 Inliner]: procedures = 271, calls = 40, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 244 [2022-11-02 20:54:01,694 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 20:54:01,695 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 20:54:01,695 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 20:54:01,696 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 20:54:01,705 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:54:01" (1/1) ... [2022-11-02 20:54:01,706 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:54:01" (1/1) ... [2022-11-02 20:54:01,726 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:54:01" (1/1) ... [2022-11-02 20:54:01,727 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:54:01" (1/1) ... [2022-11-02 20:54:01,735 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:54:01" (1/1) ... [2022-11-02 20:54:01,753 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:54:01" (1/1) ... [2022-11-02 20:54:01,757 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:54:01" (1/1) ... [2022-11-02 20:54:01,763 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:54:01" (1/1) ... [2022-11-02 20:54:01,766 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 20:54:01,773 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 20:54:01,774 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 20:54:01,774 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 20:54:01,775 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:54:01" (1/1) ... [2022-11-02 20:54:01,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:54:01,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5372df-1450-4794-aaf3-26ff7febfb1a/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:54:01,812 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5372df-1450-4794-aaf3-26ff7febfb1a/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 20:54:01,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5372df-1450-4794-aaf3-26ff7febfb1a/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 20:54:01,866 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-02 20:54:01,866 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-02 20:54:01,867 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-02 20:54:01,867 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-02 20:54:01,867 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-02 20:54:01,867 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-02 20:54:01,867 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-11-02 20:54:01,868 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-11-02 20:54:01,869 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-02 20:54:01,869 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 20:54:01,869 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 20:54:01,872 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-02 20:54:02,113 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 20:54:02,116 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 20:54:02,574 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 20:54:02,582 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 20:54:02,583 INFO L300 CfgBuilder]: Removed 35 assume(true) statements. [2022-11-02 20:54:02,585 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:54:02 BoogieIcfgContainer [2022-11-02 20:54:02,585 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 20:54:02,588 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 20:54:02,588 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 20:54:02,592 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 20:54:02,592 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 08:54:00" (1/3) ... [2022-11-02 20:54:02,593 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3de1c7e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:54:02, skipping insertion in model container [2022-11-02 20:54:02,593 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:54:01" (2/3) ... [2022-11-02 20:54:02,593 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3de1c7e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:54:02, skipping insertion in model container [2022-11-02 20:54:02,594 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:54:02" (3/3) ... [2022-11-02 20:54:02,609 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_71-funloop_racing.i [2022-11-02 20:54:02,619 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-02 20:54:02,629 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 20:54:02,629 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2022-11-02 20:54:02,629 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-02 20:54:02,700 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-11-02 20:54:02,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 210 places, 252 transitions, 512 flow [2022-11-02 20:54:02,904 INFO L130 PetriNetUnfolder]: 73/388 cut-off events. [2022-11-02 20:54:02,904 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-02 20:54:02,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 394 conditions, 388 events. 73/388 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1730 event pairs, 0 based on Foata normal form. 0/307 useless extension candidates. Maximal degree in co-relation 212. Up to 8 conditions per place. [2022-11-02 20:54:02,916 INFO L82 GeneralOperation]: Start removeDead. Operand has 210 places, 252 transitions, 512 flow [2022-11-02 20:54:02,932 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 206 places, 247 transitions, 499 flow [2022-11-02 20:54:02,948 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:54:02,954 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;@5b144136, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:54:02,954 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-11-02 20:54:02,986 INFO L130 PetriNetUnfolder]: 17/150 cut-off events. [2022-11-02 20:54:02,987 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-02 20:54:02,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:54:02,988 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:54:02,988 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-02 20:54:02,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:54:02,994 INFO L85 PathProgramCache]: Analyzing trace with hash 1626268510, now seen corresponding path program 1 times [2022-11-02 20:54:03,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:54:03,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981013826] [2022-11-02 20:54:03,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:54:03,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:54:03,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:54:03,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:54:03,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:54:03,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981013826] [2022-11-02 20:54:03,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981013826] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:54:03,272 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:54:03,273 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:54:03,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789302831] [2022-11-02 20:54:03,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:54:03,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-02 20:54:03,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:54:03,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-02 20:54:03,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 20:54:03,328 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 252 [2022-11-02 20:54:03,332 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 247 transitions, 499 flow. Second operand has 2 states, 2 states have (on average 210.0) internal successors, (420), 2 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:03,332 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:54:03,332 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 252 [2022-11-02 20:54:03,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:54:03,453 INFO L130 PetriNetUnfolder]: 9/315 cut-off events. [2022-11-02 20:54:03,453 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-02 20:54:03,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 322 conditions, 315 events. 9/315 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1380 event pairs, 0 based on Foata normal form. 63/360 useless extension candidates. Maximal degree in co-relation 174. Up to 4 conditions per place. [2022-11-02 20:54:03,460 INFO L137 encePairwiseOnDemand]: 214/252 looper letters, 1 selfloop transitions, 0 changer transitions 0/206 dead transitions. [2022-11-02 20:54:03,460 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 206 transitions, 419 flow [2022-11-02 20:54:03,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-02 20:54:03,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-02 20:54:03,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 457 transitions. [2022-11-02 20:54:03,495 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9067460317460317 [2022-11-02 20:54:03,496 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 457 transitions. [2022-11-02 20:54:03,496 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 457 transitions. [2022-11-02 20:54:03,501 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:54:03,503 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 457 transitions. [2022-11-02 20:54:03,510 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 228.5) internal successors, (457), 2 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:03,520 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 252.0) internal successors, (756), 3 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:03,521 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 252.0) internal successors, (756), 3 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:03,523 INFO L175 Difference]: Start difference. First operand has 206 places, 247 transitions, 499 flow. Second operand 2 states and 457 transitions. [2022-11-02 20:54:03,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 206 transitions, 419 flow [2022-11-02 20:54:03,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 206 transitions, 419 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-02 20:54:03,537 INFO L231 Difference]: Finished difference. Result has 204 places, 206 transitions, 417 flow [2022-11-02 20:54:03,540 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=252, PETRI_DIFFERENCE_MINUEND_FLOW=417, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=417, PETRI_PLACES=204, PETRI_TRANSITIONS=206} [2022-11-02 20:54:03,547 INFO L287 CegarLoopForPetriNet]: 206 programPoint places, -2 predicate places. [2022-11-02 20:54:03,547 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 206 transitions, 417 flow [2022-11-02 20:54:03,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 210.0) internal successors, (420), 2 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:03,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:54:03,548 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:54:03,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-02 20:54:03,550 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-02 20:54:03,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:54:03,553 INFO L85 PathProgramCache]: Analyzing trace with hash 350857692, now seen corresponding path program 1 times [2022-11-02 20:54:03,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:54:03,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859746761] [2022-11-02 20:54:03,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:54:03,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:54:03,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:54:03,726 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 20:54:03,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:54:03,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859746761] [2022-11-02 20:54:03,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859746761] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:54:03,727 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:54:03,727 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:54:03,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377284904] [2022-11-02 20:54:03,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:54:03,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:54:03,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:54:03,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:54:03,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:54:03,731 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 252 [2022-11-02 20:54:03,732 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 206 transitions, 417 flow. Second operand has 3 states, 3 states have (on average 203.33333333333334) internal successors, (610), 3 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:03,732 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:54:03,733 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 252 [2022-11-02 20:54:03,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:54:03,799 INFO L130 PetriNetUnfolder]: 9/319 cut-off events. [2022-11-02 20:54:03,799 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-02 20:54:03,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 338 conditions, 319 events. 9/319 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1378 event pairs, 0 based on Foata normal form. 0/301 useless extension candidates. Maximal degree in co-relation 334. Up to 9 conditions per place. [2022-11-02 20:54:03,803 INFO L137 encePairwiseOnDemand]: 249/252 looper letters, 10 selfloop transitions, 2 changer transitions 0/210 dead transitions. [2022-11-02 20:54:03,803 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 210 transitions, 449 flow [2022-11-02 20:54:03,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:54:03,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 20:54:03,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 619 transitions. [2022-11-02 20:54:03,806 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8187830687830688 [2022-11-02 20:54:03,806 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 619 transitions. [2022-11-02 20:54:03,806 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 619 transitions. [2022-11-02 20:54:03,807 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:54:03,807 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 619 transitions. [2022-11-02 20:54:03,809 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 206.33333333333334) internal successors, (619), 3 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:03,811 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 252.0) internal successors, (1008), 4 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:03,812 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 252.0) internal successors, (1008), 4 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:03,812 INFO L175 Difference]: Start difference. First operand has 204 places, 206 transitions, 417 flow. Second operand 3 states and 619 transitions. [2022-11-02 20:54:03,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 210 transitions, 449 flow [2022-11-02 20:54:03,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 210 transitions, 449 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-02 20:54:03,818 INFO L231 Difference]: Finished difference. Result has 207 places, 207 transitions, 429 flow [2022-11-02 20:54:03,818 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=252, PETRI_DIFFERENCE_MINUEND_FLOW=417, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=429, PETRI_PLACES=207, PETRI_TRANSITIONS=207} [2022-11-02 20:54:03,819 INFO L287 CegarLoopForPetriNet]: 206 programPoint places, 1 predicate places. [2022-11-02 20:54:03,819 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 207 transitions, 429 flow [2022-11-02 20:54:03,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 203.33333333333334) internal successors, (610), 3 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:03,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:54:03,820 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:54:03,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-02 20:54:03,821 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-02 20:54:03,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:54:03,821 INFO L85 PathProgramCache]: Analyzing trace with hash -1333822260, now seen corresponding path program 1 times [2022-11-02 20:54:03,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:54:03,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396822339] [2022-11-02 20:54:03,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:54:03,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:54:03,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:54:03,979 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:54:03,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:54:03,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396822339] [2022-11-02 20:54:03,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396822339] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:54:03,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742389693] [2022-11-02 20:54:03,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:54:03,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:54:03,981 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5372df-1450-4794-aaf3-26ff7febfb1a/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:54:03,983 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5372df-1450-4794-aaf3-26ff7febfb1a/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:54:03,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5372df-1450-4794-aaf3-26ff7febfb1a/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-02 20:54:04,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:54:04,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-02 20:54:04,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:54:04,149 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:54:04,150 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:54:04,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742389693] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:54:04,150 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:54:04,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-02 20:54:04,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302807399] [2022-11-02 20:54:04,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:54:04,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:54:04,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:54:04,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:54:04,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:54:04,153 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 252 [2022-11-02 20:54:04,154 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 207 transitions, 429 flow. Second operand has 3 states, 3 states have (on average 203.0) internal successors, (609), 3 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:04,155 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:54:04,155 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 252 [2022-11-02 20:54:04,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:54:04,225 INFO L130 PetriNetUnfolder]: 6/214 cut-off events. [2022-11-02 20:54:04,225 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-02 20:54:04,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 238 conditions, 214 events. 6/214 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 646 event pairs, 0 based on Foata normal form. 0/204 useless extension candidates. Maximal degree in co-relation 232. Up to 6 conditions per place. [2022-11-02 20:54:04,229 INFO L137 encePairwiseOnDemand]: 249/252 looper letters, 8 selfloop transitions, 2 changer transitions 0/209 dead transitions. [2022-11-02 20:54:04,229 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 209 transitions, 453 flow [2022-11-02 20:54:04,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:54:04,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 20:54:04,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 617 transitions. [2022-11-02 20:54:04,231 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8161375661375662 [2022-11-02 20:54:04,231 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 617 transitions. [2022-11-02 20:54:04,231 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 617 transitions. [2022-11-02 20:54:04,232 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:54:04,232 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 617 transitions. [2022-11-02 20:54:04,233 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 205.66666666666666) internal successors, (617), 3 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:04,235 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 252.0) internal successors, (1008), 4 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:04,236 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 252.0) internal successors, (1008), 4 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:04,236 INFO L175 Difference]: Start difference. First operand has 207 places, 207 transitions, 429 flow. Second operand 3 states and 617 transitions. [2022-11-02 20:54:04,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 209 transitions, 453 flow [2022-11-02 20:54:04,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 209 transitions, 451 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-02 20:54:04,241 INFO L231 Difference]: Finished difference. Result has 209 places, 207 transitions, 435 flow [2022-11-02 20:54:04,241 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=252, PETRI_DIFFERENCE_MINUEND_FLOW=427, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=435, PETRI_PLACES=209, PETRI_TRANSITIONS=207} [2022-11-02 20:54:04,242 INFO L287 CegarLoopForPetriNet]: 206 programPoint places, 3 predicate places. [2022-11-02 20:54:04,242 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 207 transitions, 435 flow [2022-11-02 20:54:04,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 203.0) internal successors, (609), 3 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:04,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:54:04,243 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:54:04,285 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5372df-1450-4794-aaf3-26ff7febfb1a/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-02 20:54:04,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5372df-1450-4794-aaf3-26ff7febfb1a/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-11-02 20:54:04,459 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-02 20:54:04,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:54:04,460 INFO L85 PathProgramCache]: Analyzing trace with hash 471585416, now seen corresponding path program 1 times [2022-11-02 20:54:04,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:54:04,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954623232] [2022-11-02 20:54:04,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:54:04,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:54:04,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:54:04,630 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 20:54:04,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:54:04,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954623232] [2022-11-02 20:54:04,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954623232] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:54:04,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378572275] [2022-11-02 20:54:04,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:54:04,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:54:04,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5372df-1450-4794-aaf3-26ff7febfb1a/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:54:04,632 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5372df-1450-4794-aaf3-26ff7febfb1a/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:54:04,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5372df-1450-4794-aaf3-26ff7febfb1a/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-02 20:54:04,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:54:04,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:54:04,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:54:04,806 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 20:54:04,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:54:04,873 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 20:54:04,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378572275] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:54:04,874 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:54:04,874 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-02 20:54:04,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630930455] [2022-11-02 20:54:04,876 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:54:04,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 20:54:04,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:54:04,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 20:54:04,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:54:04,888 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 252 [2022-11-02 20:54:04,892 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 207 transitions, 435 flow. Second operand has 10 states, 10 states have (on average 203.1) internal successors, (2031), 10 states have internal predecessors, (2031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:04,892 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:54:04,892 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 252 [2022-11-02 20:54:04,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:54:05,054 INFO L130 PetriNetUnfolder]: 6/221 cut-off events. [2022-11-02 20:54:05,054 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-02 20:54:05,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 260 conditions, 221 events. 6/221 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 642 event pairs, 0 based on Foata normal form. 2/214 useless extension candidates. Maximal degree in co-relation 253. Up to 6 conditions per place. [2022-11-02 20:54:05,058 INFO L137 encePairwiseOnDemand]: 246/252 looper letters, 11 selfloop transitions, 9 changer transitions 0/217 dead transitions. [2022-11-02 20:54:05,058 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 217 transitions, 497 flow [2022-11-02 20:54:05,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 20:54:05,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-02 20:54:05,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1831 transitions. [2022-11-02 20:54:05,063 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8073192239858906 [2022-11-02 20:54:05,064 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1831 transitions. [2022-11-02 20:54:05,064 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1831 transitions. [2022-11-02 20:54:05,065 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:54:05,065 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1831 transitions. [2022-11-02 20:54:05,069 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 203.44444444444446) internal successors, (1831), 9 states have internal predecessors, (1831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:05,074 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 252.0) internal successors, (2520), 10 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:05,076 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 252.0) internal successors, (2520), 10 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:05,076 INFO L175 Difference]: Start difference. First operand has 209 places, 207 transitions, 435 flow. Second operand 9 states and 1831 transitions. [2022-11-02 20:54:05,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 217 transitions, 497 flow [2022-11-02 20:54:05,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 217 transitions, 493 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-02 20:54:05,082 INFO L231 Difference]: Finished difference. Result has 218 places, 213 transitions, 481 flow [2022-11-02 20:54:05,083 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=252, PETRI_DIFFERENCE_MINUEND_FLOW=431, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=481, PETRI_PLACES=218, PETRI_TRANSITIONS=213} [2022-11-02 20:54:05,084 INFO L287 CegarLoopForPetriNet]: 206 programPoint places, 12 predicate places. [2022-11-02 20:54:05,084 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 213 transitions, 481 flow [2022-11-02 20:54:05,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 203.1) internal successors, (2031), 10 states have internal predecessors, (2031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:05,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:54:05,087 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:54:05,122 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5372df-1450-4794-aaf3-26ff7febfb1a/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-02 20:54:05,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5372df-1450-4794-aaf3-26ff7febfb1a/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:54:05,303 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-02 20:54:05,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:54:05,304 INFO L85 PathProgramCache]: Analyzing trace with hash 567047944, now seen corresponding path program 2 times [2022-11-02 20:54:05,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:54:05,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801099164] [2022-11-02 20:54:05,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:54:05,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:54:05,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:54:05,526 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 20:54:05,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:54:05,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801099164] [2022-11-02 20:54:05,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801099164] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:54:05,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413413417] [2022-11-02 20:54:05,527 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:54:05,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:54:05,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5372df-1450-4794-aaf3-26ff7febfb1a/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:54:05,529 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5372df-1450-4794-aaf3-26ff7febfb1a/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:54:05,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5372df-1450-4794-aaf3-26ff7febfb1a/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-02 20:54:05,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:54:05,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:54:05,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-02 20:54:05,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:54:05,697 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 20:54:05,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:54:05,842 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 20:54:05,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413413417] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:54:05,843 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:54:05,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-02 20:54:05,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510168152] [2022-11-02 20:54:05,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:54:05,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-02 20:54:05,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:54:05,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-02 20:54:05,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-02 20:54:05,848 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 252 [2022-11-02 20:54:05,852 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 213 transitions, 481 flow. Second operand has 18 states, 18 states have (on average 203.27777777777777) internal successors, (3659), 18 states have internal predecessors, (3659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:05,852 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:54:05,852 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 252 [2022-11-02 20:54:05,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:54:06,167 INFO L130 PetriNetUnfolder]: 6/241 cut-off events. [2022-11-02 20:54:06,167 INFO L131 PetriNetUnfolder]: For 22/22 co-relation queries the response was YES. [2022-11-02 20:54:06,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 348 conditions, 241 events. 6/241 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 638 event pairs, 0 based on Foata normal form. 4/236 useless extension candidates. Maximal degree in co-relation 339. Up to 11 conditions per place. [2022-11-02 20:54:06,170 INFO L137 encePairwiseOnDemand]: 246/252 looper letters, 19 selfloop transitions, 21 changer transitions 0/237 dead transitions. [2022-11-02 20:54:06,170 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 237 transitions, 669 flow [2022-11-02 20:54:06,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-02 20:54:06,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-02 20:54:06,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 4265 transitions. [2022-11-02 20:54:06,202 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8059334845049131 [2022-11-02 20:54:06,202 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 4265 transitions. [2022-11-02 20:54:06,202 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 4265 transitions. [2022-11-02 20:54:06,206 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:54:06,206 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 4265 transitions. [2022-11-02 20:54:06,218 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 203.0952380952381) internal successors, (4265), 21 states have internal predecessors, (4265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:06,231 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 252.0) internal successors, (5544), 22 states have internal predecessors, (5544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:06,234 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 252.0) internal successors, (5544), 22 states have internal predecessors, (5544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:06,235 INFO L175 Difference]: Start difference. First operand has 218 places, 213 transitions, 481 flow. Second operand 21 states and 4265 transitions. [2022-11-02 20:54:06,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 237 transitions, 669 flow [2022-11-02 20:54:06,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 237 transitions, 655 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-02 20:54:06,244 INFO L231 Difference]: Finished difference. Result has 242 places, 226 transitions, 605 flow [2022-11-02 20:54:06,244 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=252, PETRI_DIFFERENCE_MINUEND_FLOW=475, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=605, PETRI_PLACES=242, PETRI_TRANSITIONS=226} [2022-11-02 20:54:06,247 INFO L287 CegarLoopForPetriNet]: 206 programPoint places, 36 predicate places. [2022-11-02 20:54:06,248 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 226 transitions, 605 flow [2022-11-02 20:54:06,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 203.27777777777777) internal successors, (3659), 18 states have internal predecessors, (3659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:06,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:54:06,251 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:54:06,291 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5372df-1450-4794-aaf3-26ff7febfb1a/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-02 20:54:06,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5372df-1450-4794-aaf3-26ff7febfb1a/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:54:06,471 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-02 20:54:06,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:54:06,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1472913416, now seen corresponding path program 3 times [2022-11-02 20:54:06,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:54:06,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095488152] [2022-11-02 20:54:06,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:54:06,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:54:06,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:54:06,895 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 20:54:06,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:54:06,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095488152] [2022-11-02 20:54:06,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095488152] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:54:06,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468091850] [2022-11-02 20:54:06,896 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:54:06,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:54:06,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5372df-1450-4794-aaf3-26ff7febfb1a/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:54:06,898 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5372df-1450-4794-aaf3-26ff7febfb1a/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:54:06,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5372df-1450-4794-aaf3-26ff7febfb1a/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-02 20:54:07,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-11-02 20:54:07,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:54:07,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-02 20:54:07,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:54:07,197 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 20:54:07,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:54:07,508 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 20:54:07,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468091850] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:54:07,509 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:54:07,509 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 23 [2022-11-02 20:54:07,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411253171] [2022-11-02 20:54:07,510 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:54:07,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-02 20:54:07,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:54:07,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-02 20:54:07,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2022-11-02 20:54:07,518 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 252 [2022-11-02 20:54:07,523 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 226 transitions, 605 flow. Second operand has 23 states, 23 states have (on average 203.43478260869566) internal successors, (4679), 23 states have internal predecessors, (4679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:07,535 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:54:07,536 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 252 [2022-11-02 20:54:07,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:54:07,959 INFO L130 PetriNetUnfolder]: 6/256 cut-off events. [2022-11-02 20:54:07,959 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2022-11-02 20:54:07,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 449 conditions, 256 events. 6/256 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 641 event pairs, 0 based on Foata normal form. 3/250 useless extension candidates. Maximal degree in co-relation 435. Up to 17 conditions per place. [2022-11-02 20:54:07,963 INFO L137 encePairwiseOnDemand]: 246/252 looper letters, 25 selfloop transitions, 30 changer transitions 0/252 dead transitions. [2022-11-02 20:54:07,963 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 252 transitions, 861 flow [2022-11-02 20:54:07,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-02 20:54:07,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-11-02 20:54:07,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 6088 transitions. [2022-11-02 20:54:07,975 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8052910052910053 [2022-11-02 20:54:07,976 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 6088 transitions. [2022-11-02 20:54:07,976 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 6088 transitions. [2022-11-02 20:54:07,979 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:54:07,980 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 6088 transitions. [2022-11-02 20:54:07,992 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 202.93333333333334) internal successors, (6088), 30 states have internal predecessors, (6088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:08,006 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 252.0) internal successors, (7812), 31 states have internal predecessors, (7812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:08,019 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 252.0) internal successors, (7812), 31 states have internal predecessors, (7812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:08,027 INFO L175 Difference]: Start difference. First operand has 242 places, 226 transitions, 605 flow. Second operand 30 states and 6088 transitions. [2022-11-02 20:54:08,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 252 transitions, 861 flow [2022-11-02 20:54:08,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 252 transitions, 831 flow, removed 9 selfloop flow, removed 6 redundant places. [2022-11-02 20:54:08,038 INFO L231 Difference]: Finished difference. Result has 269 places, 236 transitions, 733 flow [2022-11-02 20:54:08,040 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=252, PETRI_DIFFERENCE_MINUEND_FLOW=581, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=733, PETRI_PLACES=269, PETRI_TRANSITIONS=236} [2022-11-02 20:54:08,041 INFO L287 CegarLoopForPetriNet]: 206 programPoint places, 63 predicate places. [2022-11-02 20:54:08,042 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 236 transitions, 733 flow [2022-11-02 20:54:08,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 203.43478260869566) internal successors, (4679), 23 states have internal predecessors, (4679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:08,045 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:54:08,045 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:54:08,089 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5372df-1450-4794-aaf3-26ff7febfb1a/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-02 20:54:08,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5372df-1450-4794-aaf3-26ff7febfb1a/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-02 20:54:08,259 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-02 20:54:08,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:54:08,259 INFO L85 PathProgramCache]: Analyzing trace with hash 715826012, now seen corresponding path program 4 times [2022-11-02 20:54:08,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:54:08,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906081017] [2022-11-02 20:54:08,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:54:08,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:54:08,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:54:08,306 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-02 20:54:08,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:54:08,372 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-02 20:54:08,373 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-02 20:54:08,374 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-11-02 20:54:08,376 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-11-02 20:54:08,376 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2022-11-02 20:54:08,376 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-11-02 20:54:08,377 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-11-02 20:54:08,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-02 20:54:08,381 INFO L444 BasicCegarLoop]: Path program histogram: [4, 1, 1, 1] [2022-11-02 20:54:08,384 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-02 20:54:08,384 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-02 20:54:08,457 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-02 20:54:08,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 270 places, 325 transitions, 668 flow [2022-11-02 20:54:08,563 INFO L130 PetriNetUnfolder]: 118/622 cut-off events. [2022-11-02 20:54:08,564 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-11-02 20:54:08,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 636 conditions, 622 events. 118/622 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 3177 event pairs, 0 based on Foata normal form. 0/492 useless extension candidates. Maximal degree in co-relation 390. Up to 12 conditions per place. [2022-11-02 20:54:08,573 INFO L82 GeneralOperation]: Start removeDead. Operand has 270 places, 325 transitions, 668 flow [2022-11-02 20:54:08,583 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 270 places, 325 transitions, 668 flow [2022-11-02 20:54:08,585 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:54:08,593 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;@5b144136, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:54:08,593 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-11-02 20:54:08,604 INFO L130 PetriNetUnfolder]: 17/149 cut-off events. [2022-11-02 20:54:08,604 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-02 20:54:08,604 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:54:08,604 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:54:08,605 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-11-02 20:54:08,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:54:08,606 INFO L85 PathProgramCache]: Analyzing trace with hash 1136251583, now seen corresponding path program 1 times [2022-11-02 20:54:08,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:54:08,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328002698] [2022-11-02 20:54:08,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:54:08,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:54:08,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:54:08,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:54:08,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:54:08,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328002698] [2022-11-02 20:54:08,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328002698] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:54:08,631 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:54:08,631 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:54:08,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391531527] [2022-11-02 20:54:08,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:54:08,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-02 20:54:08,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:54:08,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-02 20:54:08,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 20:54:08,635 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 267 out of 325 [2022-11-02 20:54:08,635 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 325 transitions, 668 flow. Second operand has 2 states, 2 states have (on average 267.5) internal successors, (535), 2 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:08,635 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:54:08,636 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 267 of 325 [2022-11-02 20:54:08,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:54:08,746 INFO L130 PetriNetUnfolder]: 17/513 cut-off events. [2022-11-02 20:54:08,746 INFO L131 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2022-11-02 20:54:08,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 534 conditions, 513 events. 17/513 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2690 event pairs, 0 based on Foata normal form. 126/610 useless extension candidates. Maximal degree in co-relation 324. Up to 7 conditions per place. [2022-11-02 20:54:08,754 INFO L137 encePairwiseOnDemand]: 275/325 looper letters, 4 selfloop transitions, 0 changer transitions 0/271 dead transitions. [2022-11-02 20:54:08,755 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 271 transitions, 568 flow [2022-11-02 20:54:08,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-02 20:54:08,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-02 20:54:08,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 588 transitions. [2022-11-02 20:54:08,758 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9046153846153846 [2022-11-02 20:54:08,758 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 588 transitions. [2022-11-02 20:54:08,758 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 588 transitions. [2022-11-02 20:54:08,758 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:54:08,759 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 588 transitions. [2022-11-02 20:54:08,760 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 294.0) internal successors, (588), 2 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:08,761 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 325.0) internal successors, (975), 3 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:08,762 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 325.0) internal successors, (975), 3 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:08,762 INFO L175 Difference]: Start difference. First operand has 270 places, 325 transitions, 668 flow. Second operand 2 states and 588 transitions. [2022-11-02 20:54:08,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 271 transitions, 568 flow [2022-11-02 20:54:08,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 271 transitions, 568 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-02 20:54:08,773 INFO L231 Difference]: Finished difference. Result has 267 places, 271 transitions, 560 flow [2022-11-02 20:54:08,774 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=560, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=560, PETRI_PLACES=267, PETRI_TRANSITIONS=271} [2022-11-02 20:54:08,775 INFO L287 CegarLoopForPetriNet]: 270 programPoint places, -3 predicate places. [2022-11-02 20:54:08,775 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 271 transitions, 560 flow [2022-11-02 20:54:08,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 267.5) internal successors, (535), 2 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:08,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:54:08,776 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:54:08,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-02 20:54:08,777 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-11-02 20:54:08,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:54:08,777 INFO L85 PathProgramCache]: Analyzing trace with hash 842848576, now seen corresponding path program 1 times [2022-11-02 20:54:08,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:54:08,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616980026] [2022-11-02 20:54:08,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:54:08,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:54:08,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:54:08,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:54:08,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:54:08,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616980026] [2022-11-02 20:54:08,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616980026] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:54:08,851 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:54:08,856 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:54:08,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233103402] [2022-11-02 20:54:08,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:54:08,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:54:08,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:54:08,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:54:08,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:54:08,859 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 260 out of 325 [2022-11-02 20:54:08,861 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 271 transitions, 560 flow. Second operand has 3 states, 3 states have (on average 261.0) internal successors, (783), 3 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:08,862 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:54:08,862 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 260 of 325 [2022-11-02 20:54:08,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:54:08,976 INFO L130 PetriNetUnfolder]: 17/517 cut-off events. [2022-11-02 20:54:08,976 INFO L131 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2022-11-02 20:54:08,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 550 conditions, 517 events. 17/517 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2693 event pairs, 0 based on Foata normal form. 0/488 useless extension candidates. Maximal degree in co-relation 545. Up to 14 conditions per place. [2022-11-02 20:54:08,985 INFO L137 encePairwiseOnDemand]: 322/325 looper letters, 13 selfloop transitions, 2 changer transitions 0/275 dead transitions. [2022-11-02 20:54:08,985 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 275 transitions, 598 flow [2022-11-02 20:54:08,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:54:08,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 20:54:08,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 796 transitions. [2022-11-02 20:54:08,989 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8164102564102564 [2022-11-02 20:54:08,989 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 796 transitions. [2022-11-02 20:54:08,989 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 796 transitions. [2022-11-02 20:54:08,990 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:54:08,990 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 796 transitions. [2022-11-02 20:54:08,992 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 265.3333333333333) internal successors, (796), 3 states have internal predecessors, (796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:08,994 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 325.0) internal successors, (1300), 4 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:08,995 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 325.0) internal successors, (1300), 4 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:08,995 INFO L175 Difference]: Start difference. First operand has 267 places, 271 transitions, 560 flow. Second operand 3 states and 796 transitions. [2022-11-02 20:54:08,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 275 transitions, 598 flow [2022-11-02 20:54:08,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 275 transitions, 598 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-02 20:54:09,002 INFO L231 Difference]: Finished difference. Result has 270 places, 272 transitions, 572 flow [2022-11-02 20:54:09,003 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=560, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=572, PETRI_PLACES=270, PETRI_TRANSITIONS=272} [2022-11-02 20:54:09,005 INFO L287 CegarLoopForPetriNet]: 270 programPoint places, 0 predicate places. [2022-11-02 20:54:09,005 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 272 transitions, 572 flow [2022-11-02 20:54:09,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 261.0) internal successors, (783), 3 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:09,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:54:09,006 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:54:09,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-02 20:54:09,006 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-11-02 20:54:09,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:54:09,007 INFO L85 PathProgramCache]: Analyzing trace with hash -1567446095, now seen corresponding path program 1 times [2022-11-02 20:54:09,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:54:09,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071277242] [2022-11-02 20:54:09,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:54:09,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:54:09,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:54:09,093 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:54:09,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:54:09,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071277242] [2022-11-02 20:54:09,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071277242] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:54:09,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331718614] [2022-11-02 20:54:09,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:54:09,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:54:09,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5372df-1450-4794-aaf3-26ff7febfb1a/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:54:09,096 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5372df-1450-4794-aaf3-26ff7febfb1a/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:54:09,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5372df-1450-4794-aaf3-26ff7febfb1a/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-02 20:54:09,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:54:09,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-02 20:54:09,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:54:09,219 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:54:09,219 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:54:09,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331718614] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:54:09,219 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:54:09,220 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-02 20:54:09,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489283226] [2022-11-02 20:54:09,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:54:09,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:54:09,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:54:09,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:54:09,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:54:09,222 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 260 out of 325 [2022-11-02 20:54:09,223 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 272 transitions, 572 flow. Second operand has 3 states, 3 states have (on average 261.0) internal successors, (783), 3 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:09,224 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:54:09,224 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 260 of 325 [2022-11-02 20:54:09,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:54:09,341 INFO L130 PetriNetUnfolder]: 13/421 cut-off events. [2022-11-02 20:54:09,342 INFO L131 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2022-11-02 20:54:09,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 464 conditions, 421 events. 13/421 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1988 event pairs, 0 based on Foata normal form. 0/399 useless extension candidates. Maximal degree in co-relation 457. Up to 16 conditions per place. [2022-11-02 20:54:09,350 INFO L137 encePairwiseOnDemand]: 322/325 looper letters, 13 selfloop transitions, 2 changer transitions 0/276 dead transitions. [2022-11-02 20:54:09,350 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 276 transitions, 610 flow [2022-11-02 20:54:09,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:54:09,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 20:54:09,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 796 transitions. [2022-11-02 20:54:09,353 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8164102564102564 [2022-11-02 20:54:09,353 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 796 transitions. [2022-11-02 20:54:09,354 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 796 transitions. [2022-11-02 20:54:09,354 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:54:09,355 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 796 transitions. [2022-11-02 20:54:09,357 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 265.3333333333333) internal successors, (796), 3 states have internal predecessors, (796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:09,359 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 325.0) internal successors, (1300), 4 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:09,360 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 325.0) internal successors, (1300), 4 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:09,360 INFO L175 Difference]: Start difference. First operand has 270 places, 272 transitions, 572 flow. Second operand 3 states and 796 transitions. [2022-11-02 20:54:09,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 276 transitions, 610 flow [2022-11-02 20:54:09,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 276 transitions, 608 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-02 20:54:09,367 INFO L231 Difference]: Finished difference. Result has 272 places, 273 transitions, 582 flow [2022-11-02 20:54:09,368 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=570, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=582, PETRI_PLACES=272, PETRI_TRANSITIONS=273} [2022-11-02 20:54:09,369 INFO L287 CegarLoopForPetriNet]: 270 programPoint places, 2 predicate places. [2022-11-02 20:54:09,369 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 273 transitions, 582 flow [2022-11-02 20:54:09,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 261.0) internal successors, (783), 3 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:09,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:54:09,370 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:54:09,408 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5372df-1450-4794-aaf3-26ff7febfb1a/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-02 20:54:09,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5372df-1450-4794-aaf3-26ff7febfb1a/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-02 20:54:09,583 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-11-02 20:54:09,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:54:09,583 INFO L85 PathProgramCache]: Analyzing trace with hash -909156870, now seen corresponding path program 1 times [2022-11-02 20:54:09,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:54:09,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218425195] [2022-11-02 20:54:09,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:54:09,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:54:09,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:54:09,656 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-02 20:54:09,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:54:09,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218425195] [2022-11-02 20:54:09,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218425195] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:54:09,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039061132] [2022-11-02 20:54:09,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:54:09,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:54:09,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5372df-1450-4794-aaf3-26ff7febfb1a/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:54:09,659 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5372df-1450-4794-aaf3-26ff7febfb1a/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:54:09,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5372df-1450-4794-aaf3-26ff7febfb1a/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-02 20:54:09,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:54:09,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:54:09,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:54:09,799 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-02 20:54:09,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:54:09,841 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-02 20:54:09,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039061132] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:54:09,842 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:54:09,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-02 20:54:09,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386792347] [2022-11-02 20:54:09,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:54:09,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 20:54:09,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:54:09,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 20:54:09,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:54:09,849 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 259 out of 325 [2022-11-02 20:54:09,852 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 273 transitions, 582 flow. Second operand has 10 states, 10 states have (on average 261.2) internal successors, (2612), 10 states have internal predecessors, (2612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:09,852 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:54:09,852 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 259 of 325 [2022-11-02 20:54:09,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:54:10,010 INFO L130 PetriNetUnfolder]: 13/428 cut-off events. [2022-11-02 20:54:10,011 INFO L131 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2022-11-02 20:54:10,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 483 conditions, 428 events. 13/428 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1980 event pairs, 0 based on Foata normal form. 2/410 useless extension candidates. Maximal degree in co-relation 475. Up to 11 conditions per place. [2022-11-02 20:54:10,020 INFO L137 encePairwiseOnDemand]: 319/325 looper letters, 14 selfloop transitions, 9 changer transitions 0/283 dead transitions. [2022-11-02 20:54:10,020 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 283 transitions, 650 flow [2022-11-02 20:54:10,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 20:54:10,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-02 20:54:10,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2356 transitions. [2022-11-02 20:54:10,025 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8054700854700855 [2022-11-02 20:54:10,026 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2356 transitions. [2022-11-02 20:54:10,026 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2356 transitions. [2022-11-02 20:54:10,027 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:54:10,028 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2356 transitions. [2022-11-02 20:54:10,032 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 261.77777777777777) internal successors, (2356), 9 states have internal predecessors, (2356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:10,037 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 325.0) internal successors, (3250), 10 states have internal predecessors, (3250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:10,039 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 325.0) internal successors, (3250), 10 states have internal predecessors, (3250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:10,039 INFO L175 Difference]: Start difference. First operand has 272 places, 273 transitions, 582 flow. Second operand 9 states and 2356 transitions. [2022-11-02 20:54:10,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 283 transitions, 650 flow [2022-11-02 20:54:10,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 283 transitions, 648 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-02 20:54:10,047 INFO L231 Difference]: Finished difference. Result has 282 places, 279 transitions, 630 flow [2022-11-02 20:54:10,049 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=580, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=630, PETRI_PLACES=282, PETRI_TRANSITIONS=279} [2022-11-02 20:54:10,049 INFO L287 CegarLoopForPetriNet]: 270 programPoint places, 12 predicate places. [2022-11-02 20:54:10,050 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 279 transitions, 630 flow [2022-11-02 20:54:10,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 261.2) internal successors, (2612), 10 states have internal predecessors, (2612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:10,051 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:54:10,051 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:54:10,089 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5372df-1450-4794-aaf3-26ff7febfb1a/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-02 20:54:10,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5372df-1450-4794-aaf3-26ff7febfb1a/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:54:10,275 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-11-02 20:54:10,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:54:10,275 INFO L85 PathProgramCache]: Analyzing trace with hash 989555546, now seen corresponding path program 2 times [2022-11-02 20:54:10,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:54:10,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823388380] [2022-11-02 20:54:10,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:54:10,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:54:10,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:54:10,459 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-02 20:54:10,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:54:10,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823388380] [2022-11-02 20:54:10,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823388380] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:54:10,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385089352] [2022-11-02 20:54:10,460 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:54:10,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:54:10,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5372df-1450-4794-aaf3-26ff7febfb1a/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:54:10,461 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5372df-1450-4794-aaf3-26ff7febfb1a/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:54:10,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5372df-1450-4794-aaf3-26ff7febfb1a/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-02 20:54:10,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:54:10,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:54:10,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-02 20:54:10,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:54:10,626 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-02 20:54:10,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:54:10,744 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-02 20:54:10,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385089352] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:54:10,745 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:54:10,745 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-02 20:54:10,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996576657] [2022-11-02 20:54:10,746 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:54:10,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-02 20:54:10,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:54:10,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-02 20:54:10,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-02 20:54:10,755 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 259 out of 325 [2022-11-02 20:54:10,759 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 279 transitions, 630 flow. Second operand has 18 states, 18 states have (on average 261.3333333333333) internal successors, (4704), 18 states have internal predecessors, (4704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:10,759 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:54:10,759 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 259 of 325 [2022-11-02 20:54:10,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:54:11,078 INFO L130 PetriNetUnfolder]: 13/448 cut-off events. [2022-11-02 20:54:11,078 INFO L131 PetriNetUnfolder]: For 38/38 co-relation queries the response was YES. [2022-11-02 20:54:11,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 572 conditions, 448 events. 13/448 cut-off events. For 38/38 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1987 event pairs, 0 based on Foata normal form. 4/432 useless extension candidates. Maximal degree in co-relation 562. Up to 11 conditions per place. [2022-11-02 20:54:11,086 INFO L137 encePairwiseOnDemand]: 319/325 looper letters, 22 selfloop transitions, 21 changer transitions 0/303 dead transitions. [2022-11-02 20:54:11,087 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 303 transitions, 824 flow [2022-11-02 20:54:11,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-02 20:54:11,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-02 20:54:11,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 5486 transitions. [2022-11-02 20:54:11,099 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8038095238095239 [2022-11-02 20:54:11,099 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 5486 transitions. [2022-11-02 20:54:11,099 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 5486 transitions. [2022-11-02 20:54:11,103 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:54:11,103 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 5486 transitions. [2022-11-02 20:54:11,114 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 261.23809523809524) internal successors, (5486), 21 states have internal predecessors, (5486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:11,126 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 325.0) internal successors, (7150), 22 states have internal predecessors, (7150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:11,129 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 325.0) internal successors, (7150), 22 states have internal predecessors, (7150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:11,130 INFO L175 Difference]: Start difference. First operand has 282 places, 279 transitions, 630 flow. Second operand 21 states and 5486 transitions. [2022-11-02 20:54:11,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 303 transitions, 824 flow [2022-11-02 20:54:11,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 303 transitions, 810 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-02 20:54:11,138 INFO L231 Difference]: Finished difference. Result has 306 places, 292 transitions, 754 flow [2022-11-02 20:54:11,138 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=624, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=754, PETRI_PLACES=306, PETRI_TRANSITIONS=292} [2022-11-02 20:54:11,139 INFO L287 CegarLoopForPetriNet]: 270 programPoint places, 36 predicate places. [2022-11-02 20:54:11,139 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 292 transitions, 754 flow [2022-11-02 20:54:11,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 261.3333333333333) internal successors, (4704), 18 states have internal predecessors, (4704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:11,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:54:11,142 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:54:11,182 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5372df-1450-4794-aaf3-26ff7febfb1a/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-02 20:54:11,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5372df-1450-4794-aaf3-26ff7febfb1a/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:54:11,355 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-11-02 20:54:11,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:54:11,355 INFO L85 PathProgramCache]: Analyzing trace with hash 956161562, now seen corresponding path program 3 times [2022-11-02 20:54:11,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:54:11,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878167576] [2022-11-02 20:54:11,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:54:11,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:54:11,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:54:11,687 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-02 20:54:11,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:54:11,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878167576] [2022-11-02 20:54:11,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878167576] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:54:11,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439921438] [2022-11-02 20:54:11,688 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:54:11,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:54:11,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5372df-1450-4794-aaf3-26ff7febfb1a/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:54:11,691 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5372df-1450-4794-aaf3-26ff7febfb1a/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:54:11,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5372df-1450-4794-aaf3-26ff7febfb1a/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-02 20:54:11,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-11-02 20:54:11,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:54:11,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-02 20:54:11,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:54:11,968 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-02 20:54:11,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:54:12,198 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-02 20:54:12,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439921438] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:54:12,199 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:54:12,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 23 [2022-11-02 20:54:12,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921743272] [2022-11-02 20:54:12,199 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:54:12,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-02 20:54:12,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:54:12,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-02 20:54:12,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2022-11-02 20:54:12,207 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 259 out of 325 [2022-11-02 20:54:12,213 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 292 transitions, 754 flow. Second operand has 23 states, 23 states have (on average 261.4782608695652) internal successors, (6014), 23 states have internal predecessors, (6014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:12,213 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:54:12,213 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 259 of 325 [2022-11-02 20:54:12,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:54:12,676 INFO L130 PetriNetUnfolder]: 13/463 cut-off events. [2022-11-02 20:54:12,677 INFO L131 PetriNetUnfolder]: For 126/126 co-relation queries the response was YES. [2022-11-02 20:54:12,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 673 conditions, 463 events. 13/463 cut-off events. For 126/126 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1978 event pairs, 0 based on Foata normal form. 3/446 useless extension candidates. Maximal degree in co-relation 658. Up to 17 conditions per place. [2022-11-02 20:54:12,685 INFO L137 encePairwiseOnDemand]: 319/325 looper letters, 28 selfloop transitions, 30 changer transitions 0/318 dead transitions. [2022-11-02 20:54:12,685 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 318 transitions, 1016 flow [2022-11-02 20:54:12,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-02 20:54:12,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-11-02 20:54:12,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 7831 transitions. [2022-11-02 20:54:12,698 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8031794871794872 [2022-11-02 20:54:12,698 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 7831 transitions. [2022-11-02 20:54:12,699 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 7831 transitions. [2022-11-02 20:54:12,703 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:54:12,703 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 7831 transitions. [2022-11-02 20:54:12,721 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 261.03333333333336) internal successors, (7831), 30 states have internal predecessors, (7831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:12,737 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 325.0) internal successors, (10075), 31 states have internal predecessors, (10075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:12,741 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 325.0) internal successors, (10075), 31 states have internal predecessors, (10075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:12,742 INFO L175 Difference]: Start difference. First operand has 306 places, 292 transitions, 754 flow. Second operand 30 states and 7831 transitions. [2022-11-02 20:54:12,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 318 transitions, 1016 flow [2022-11-02 20:54:12,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 318 transitions, 986 flow, removed 9 selfloop flow, removed 6 redundant places. [2022-11-02 20:54:12,750 INFO L231 Difference]: Finished difference. Result has 333 places, 302 transitions, 882 flow [2022-11-02 20:54:12,750 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=730, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=882, PETRI_PLACES=333, PETRI_TRANSITIONS=302} [2022-11-02 20:54:12,751 INFO L287 CegarLoopForPetriNet]: 270 programPoint places, 63 predicate places. [2022-11-02 20:54:12,751 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 302 transitions, 882 flow [2022-11-02 20:54:12,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 261.4782608695652) internal successors, (6014), 23 states have internal predecessors, (6014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:12,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:54:12,753 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:54:12,795 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5372df-1450-4794-aaf3-26ff7febfb1a/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-02 20:54:12,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5372df-1450-4794-aaf3-26ff7febfb1a/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-02 20:54:12,976 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-11-02 20:54:12,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:54:12,977 INFO L85 PathProgramCache]: Analyzing trace with hash 731956713, now seen corresponding path program 4 times [2022-11-02 20:54:12,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:54:12,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460924784] [2022-11-02 20:54:12,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:54:12,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:54:13,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:54:13,003 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-02 20:54:13,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:54:13,029 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-02 20:54:13,029 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-02 20:54:13,029 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2022-11-02 20:54:13,030 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2022-11-02 20:54:13,030 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2022-11-02 20:54:13,030 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2022-11-02 20:54:13,030 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2022-11-02 20:54:13,030 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2022-11-02 20:54:13,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-02 20:54:13,031 INFO L444 BasicCegarLoop]: Path program histogram: [4, 1, 1, 1] [2022-11-02 20:54:13,032 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-02 20:54:13,032 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-11-02 20:54:13,066 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-02 20:54:13,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 330 places, 398 transitions, 826 flow [2022-11-02 20:54:13,271 INFO L130 PetriNetUnfolder]: 168/889 cut-off events. [2022-11-02 20:54:13,271 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-11-02 20:54:13,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 917 conditions, 889 events. 168/889 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 4850 event pairs, 1 based on Foata normal form. 0/706 useless extension candidates. Maximal degree in co-relation 630. Up to 16 conditions per place. [2022-11-02 20:54:13,292 INFO L82 GeneralOperation]: Start removeDead. Operand has 330 places, 398 transitions, 826 flow [2022-11-02 20:54:13,305 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 330 places, 398 transitions, 826 flow [2022-11-02 20:54:13,307 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:54:13,307 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;@5b144136, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:54:13,307 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-11-02 20:54:13,319 INFO L130 PetriNetUnfolder]: 21/162 cut-off events. [2022-11-02 20:54:13,320 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-02 20:54:13,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:54:13,320 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:54:13,320 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-02 20:54:13,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:54:13,321 INFO L85 PathProgramCache]: Analyzing trace with hash 1754637758, now seen corresponding path program 1 times [2022-11-02 20:54:13,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:54:13,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427068170] [2022-11-02 20:54:13,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:54:13,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:54:13,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:54:13,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:54:13,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:54:13,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427068170] [2022-11-02 20:54:13,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427068170] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:54:13,337 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:54:13,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:54:13,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105732426] [2022-11-02 20:54:13,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:54:13,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-02 20:54:13,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:54:13,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-02 20:54:13,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 20:54:13,339 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 325 out of 398 [2022-11-02 20:54:13,340 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 398 transitions, 826 flow. Second operand has 2 states, 2 states have (on average 326.0) internal successors, (652), 2 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:13,340 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:54:13,340 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 325 of 398 [2022-11-02 20:54:13,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:54:13,504 INFO L130 PetriNetUnfolder]: 27/737 cut-off events. [2022-11-02 20:54:13,504 INFO L131 PetriNetUnfolder]: For 49/49 co-relation queries the response was YES. [2022-11-02 20:54:13,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 781 conditions, 737 events. 27/737 cut-off events. For 49/49 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 4171 event pairs, 1 based on Foata normal form. 256/951 useless extension candidates. Maximal degree in co-relation 527. Up to 16 conditions per place. [2022-11-02 20:54:13,522 INFO L137 encePairwiseOnDemand]: 336/398 looper letters, 6 selfloop transitions, 0 changer transitions 0/331 dead transitions. [2022-11-02 20:54:13,523 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 331 transitions, 704 flow [2022-11-02 20:54:13,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-02 20:54:13,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-02 20:54:13,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 718 transitions. [2022-11-02 20:54:13,525 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9020100502512562 [2022-11-02 20:54:13,525 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 718 transitions. [2022-11-02 20:54:13,525 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 718 transitions. [2022-11-02 20:54:13,526 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:54:13,526 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 718 transitions. [2022-11-02 20:54:13,528 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 359.0) internal successors, (718), 2 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:13,529 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 398.0) internal successors, (1194), 3 states have internal predecessors, (1194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:13,530 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 398.0) internal successors, (1194), 3 states have internal predecessors, (1194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:13,530 INFO L175 Difference]: Start difference. First operand has 330 places, 398 transitions, 826 flow. Second operand 2 states and 718 transitions. [2022-11-02 20:54:13,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 331 transitions, 704 flow [2022-11-02 20:54:13,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 331 transitions, 704 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-02 20:54:13,537 INFO L231 Difference]: Finished difference. Result has 326 places, 331 transitions, 692 flow [2022-11-02 20:54:13,538 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=398, PETRI_DIFFERENCE_MINUEND_FLOW=692, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=692, PETRI_PLACES=326, PETRI_TRANSITIONS=331} [2022-11-02 20:54:13,540 INFO L287 CegarLoopForPetriNet]: 330 programPoint places, -4 predicate places. [2022-11-02 20:54:13,540 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 331 transitions, 692 flow [2022-11-02 20:54:13,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 326.0) internal successors, (652), 2 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:13,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:54:13,541 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:54:13,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-02 20:54:13,541 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-02 20:54:13,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:54:13,542 INFO L85 PathProgramCache]: Analyzing trace with hash 616762880, now seen corresponding path program 1 times [2022-11-02 20:54:13,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:54:13,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916360866] [2022-11-02 20:54:13,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:54:13,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:54:13,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:54:13,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:54:13,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:54:13,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916360866] [2022-11-02 20:54:13,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916360866] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:54:13,570 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:54:13,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:54:13,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181892371] [2022-11-02 20:54:13,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:54:13,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:54:13,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:54:13,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:54:13,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:54:13,573 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 318 out of 398 [2022-11-02 20:54:13,574 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 331 transitions, 692 flow. Second operand has 3 states, 3 states have (on average 319.0) internal successors, (957), 3 states have internal predecessors, (957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:13,575 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:54:13,575 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 318 of 398 [2022-11-02 20:54:13,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:54:13,744 INFO L130 PetriNetUnfolder]: 27/741 cut-off events. [2022-11-02 20:54:13,744 INFO L131 PetriNetUnfolder]: For 49/49 co-relation queries the response was YES. [2022-11-02 20:54:13,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 797 conditions, 741 events. 27/741 cut-off events. For 49/49 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 4155 event pairs, 1 based on Foata normal form. 0/699 useless extension candidates. Maximal degree in co-relation 791. Up to 23 conditions per place. [2022-11-02 20:54:13,759 INFO L137 encePairwiseOnDemand]: 395/398 looper letters, 15 selfloop transitions, 2 changer transitions 0/335 dead transitions. [2022-11-02 20:54:13,760 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 335 transitions, 734 flow [2022-11-02 20:54:13,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:54:13,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 20:54:13,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 972 transitions. [2022-11-02 20:54:13,762 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8140703517587939 [2022-11-02 20:54:13,762 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 972 transitions. [2022-11-02 20:54:13,763 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 972 transitions. [2022-11-02 20:54:13,763 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:54:13,763 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 972 transitions. [2022-11-02 20:54:13,765 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 324.0) internal successors, (972), 3 states have internal predecessors, (972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:13,767 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 398.0) internal successors, (1592), 4 states have internal predecessors, (1592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:13,768 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 398.0) internal successors, (1592), 4 states have internal predecessors, (1592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:13,768 INFO L175 Difference]: Start difference. First operand has 326 places, 331 transitions, 692 flow. Second operand 3 states and 972 transitions. [2022-11-02 20:54:13,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 335 transitions, 734 flow [2022-11-02 20:54:13,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 335 transitions, 734 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-02 20:54:13,775 INFO L231 Difference]: Finished difference. Result has 329 places, 332 transitions, 704 flow [2022-11-02 20:54:13,776 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=398, PETRI_DIFFERENCE_MINUEND_FLOW=692, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=704, PETRI_PLACES=329, PETRI_TRANSITIONS=332} [2022-11-02 20:54:13,776 INFO L287 CegarLoopForPetriNet]: 330 programPoint places, -1 predicate places. [2022-11-02 20:54:13,776 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 332 transitions, 704 flow [2022-11-02 20:54:13,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 319.0) internal successors, (957), 3 states have internal predecessors, (957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:13,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:54:13,777 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:54:13,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-02 20:54:13,777 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-02 20:54:13,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:54:13,778 INFO L85 PathProgramCache]: Analyzing trace with hash 1846734079, now seen corresponding path program 1 times [2022-11-02 20:54:13,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:54:13,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366614481] [2022-11-02 20:54:13,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:54:13,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:54:13,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:54:13,828 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:54:13,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:54:13,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366614481] [2022-11-02 20:54:13,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366614481] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:54:13,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420839690] [2022-11-02 20:54:13,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:54:13,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:54:13,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5372df-1450-4794-aaf3-26ff7febfb1a/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:54:13,830 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5372df-1450-4794-aaf3-26ff7febfb1a/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:54:13,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5372df-1450-4794-aaf3-26ff7febfb1a/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-02 20:54:13,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:54:13,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-02 20:54:13,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:54:13,946 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:54:13,946 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:54:13,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420839690] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:54:13,946 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:54:13,946 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-02 20:54:13,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15606702] [2022-11-02 20:54:13,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:54:13,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:54:13,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:54:13,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:54:13,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:54:13,949 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 318 out of 398 [2022-11-02 20:54:13,950 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 332 transitions, 704 flow. Second operand has 3 states, 3 states have (on average 319.0) internal successors, (957), 3 states have internal predecessors, (957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:13,951 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:54:13,951 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 318 of 398 [2022-11-02 20:54:13,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:54:14,140 INFO L130 PetriNetUnfolder]: 23/645 cut-off events. [2022-11-02 20:54:14,140 INFO L131 PetriNetUnfolder]: For 44/44 co-relation queries the response was YES. [2022-11-02 20:54:14,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 716 conditions, 645 events. 23/645 cut-off events. For 44/44 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 3490 event pairs, 1 based on Foata normal form. 0/610 useless extension candidates. Maximal degree in co-relation 708. Up to 30 conditions per place. [2022-11-02 20:54:14,153 INFO L137 encePairwiseOnDemand]: 395/398 looper letters, 15 selfloop transitions, 2 changer transitions 0/336 dead transitions. [2022-11-02 20:54:14,153 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 336 transitions, 746 flow [2022-11-02 20:54:14,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:54:14,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 20:54:14,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 972 transitions. [2022-11-02 20:54:14,155 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8140703517587939 [2022-11-02 20:54:14,156 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 972 transitions. [2022-11-02 20:54:14,156 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 972 transitions. [2022-11-02 20:54:14,156 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:54:14,156 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 972 transitions. [2022-11-02 20:54:14,158 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 324.0) internal successors, (972), 3 states have internal predecessors, (972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:14,160 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 398.0) internal successors, (1592), 4 states have internal predecessors, (1592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:14,161 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 398.0) internal successors, (1592), 4 states have internal predecessors, (1592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:14,161 INFO L175 Difference]: Start difference. First operand has 329 places, 332 transitions, 704 flow. Second operand 3 states and 972 transitions. [2022-11-02 20:54:14,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 336 transitions, 746 flow [2022-11-02 20:54:14,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 336 transitions, 744 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-02 20:54:14,168 INFO L231 Difference]: Finished difference. Result has 331 places, 333 transitions, 714 flow [2022-11-02 20:54:14,169 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=398, PETRI_DIFFERENCE_MINUEND_FLOW=702, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=714, PETRI_PLACES=331, PETRI_TRANSITIONS=333} [2022-11-02 20:54:14,169 INFO L287 CegarLoopForPetriNet]: 330 programPoint places, 1 predicate places. [2022-11-02 20:54:14,170 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 333 transitions, 714 flow [2022-11-02 20:54:14,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 319.0) internal successors, (957), 3 states have internal predecessors, (957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:14,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:54:14,170 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:54:14,210 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5372df-1450-4794-aaf3-26ff7febfb1a/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-02 20:54:14,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5372df-1450-4794-aaf3-26ff7febfb1a/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-02 20:54:14,399 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-02 20:54:14,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:54:14,399 INFO L85 PathProgramCache]: Analyzing trace with hash -1623135996, now seen corresponding path program 1 times [2022-11-02 20:54:14,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:54:14,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001547382] [2022-11-02 20:54:14,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:54:14,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:54:14,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:54:14,461 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:54:14,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:54:14,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001547382] [2022-11-02 20:54:14,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001547382] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:54:14,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5396271] [2022-11-02 20:54:14,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:54:14,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:54:14,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5372df-1450-4794-aaf3-26ff7febfb1a/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:54:14,464 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5372df-1450-4794-aaf3-26ff7febfb1a/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:54:14,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5372df-1450-4794-aaf3-26ff7febfb1a/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-02 20:54:14,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:54:14,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-02 20:54:14,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:54:14,582 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 20:54:14,583 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:54:14,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5396271] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:54:14,583 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:54:14,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-02 20:54:14,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042333700] [2022-11-02 20:54:14,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:54:14,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:54:14,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:54:14,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:54:14,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:54:14,586 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 317 out of 398 [2022-11-02 20:54:14,587 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 333 transitions, 714 flow. Second operand has 3 states, 3 states have (on average 318.6666666666667) internal successors, (956), 3 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:14,587 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:54:14,587 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 317 of 398 [2022-11-02 20:54:14,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:54:14,804 INFO L130 PetriNetUnfolder]: 26/798 cut-off events. [2022-11-02 20:54:14,805 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2022-11-02 20:54:14,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 890 conditions, 798 events. 26/798 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 3979 event pairs, 1 based on Foata normal form. 0/760 useless extension candidates. Maximal degree in co-relation 881. Up to 36 conditions per place. [2022-11-02 20:54:14,825 INFO L137 encePairwiseOnDemand]: 395/398 looper letters, 16 selfloop transitions, 2 changer transitions 0/337 dead transitions. [2022-11-02 20:54:14,825 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 337 transitions, 758 flow [2022-11-02 20:54:14,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:54:14,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 20:54:14,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 970 transitions. [2022-11-02 20:54:14,828 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8123953098827471 [2022-11-02 20:54:14,828 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 970 transitions. [2022-11-02 20:54:14,828 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 970 transitions. [2022-11-02 20:54:14,829 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:54:14,829 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 970 transitions. [2022-11-02 20:54:14,831 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 323.3333333333333) internal successors, (970), 3 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:14,834 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 398.0) internal successors, (1592), 4 states have internal predecessors, (1592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:14,834 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 398.0) internal successors, (1592), 4 states have internal predecessors, (1592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:14,835 INFO L175 Difference]: Start difference. First operand has 331 places, 333 transitions, 714 flow. Second operand 3 states and 970 transitions. [2022-11-02 20:54:14,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 337 transitions, 758 flow [2022-11-02 20:54:14,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 337 transitions, 756 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-02 20:54:14,863 INFO L231 Difference]: Finished difference. Result has 333 places, 334 transitions, 724 flow [2022-11-02 20:54:14,864 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=398, PETRI_DIFFERENCE_MINUEND_FLOW=712, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=724, PETRI_PLACES=333, PETRI_TRANSITIONS=334} [2022-11-02 20:54:14,864 INFO L287 CegarLoopForPetriNet]: 330 programPoint places, 3 predicate places. [2022-11-02 20:54:14,865 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 334 transitions, 724 flow [2022-11-02 20:54:14,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 318.6666666666667) internal successors, (956), 3 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:14,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:54:14,865 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:54:14,906 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5372df-1450-4794-aaf3-26ff7febfb1a/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-02 20:54:15,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5372df-1450-4794-aaf3-26ff7febfb1a/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-02 20:54:15,075 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-02 20:54:15,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:54:15,075 INFO L85 PathProgramCache]: Analyzing trace with hash 1970085585, now seen corresponding path program 1 times [2022-11-02 20:54:15,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:54:15,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311207480] [2022-11-02 20:54:15,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:54:15,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:54:15,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:54:15,130 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:54:15,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:54:15,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311207480] [2022-11-02 20:54:15,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311207480] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:54:15,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568173991] [2022-11-02 20:54:15,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:54:15,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:54:15,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5372df-1450-4794-aaf3-26ff7febfb1a/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:54:15,133 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5372df-1450-4794-aaf3-26ff7febfb1a/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:54:15,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5372df-1450-4794-aaf3-26ff7febfb1a/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-02 20:54:15,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:54:15,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:54:15,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:54:15,271 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:54:15,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:54:15,300 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:54:15,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568173991] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:54:15,301 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:54:15,301 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-02 20:54:15,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25687392] [2022-11-02 20:54:15,302 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:54:15,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 20:54:15,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:54:15,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 20:54:15,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:54:15,307 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 317 out of 398 [2022-11-02 20:54:15,311 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 334 transitions, 724 flow. Second operand has 10 states, 10 states have (on average 319.1) internal successors, (3191), 10 states have internal predecessors, (3191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:15,311 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:54:15,311 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 317 of 398 [2022-11-02 20:54:15,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:54:15,580 INFO L130 PetriNetUnfolder]: 26/805 cut-off events. [2022-11-02 20:54:15,580 INFO L131 PetriNetUnfolder]: For 52/52 co-relation queries the response was YES. [2022-11-02 20:54:15,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 900 conditions, 805 events. 26/805 cut-off events. For 52/52 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 3981 event pairs, 1 based on Foata normal form. 2/772 useless extension candidates. Maximal degree in co-relation 890. Up to 20 conditions per place. [2022-11-02 20:54:15,600 INFO L137 encePairwiseOnDemand]: 392/398 looper letters, 16 selfloop transitions, 9 changer transitions 0/344 dead transitions. [2022-11-02 20:54:15,601 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 344 transitions, 796 flow [2022-11-02 20:54:15,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 20:54:15,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-02 20:54:15,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2880 transitions. [2022-11-02 20:54:15,605 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8040201005025126 [2022-11-02 20:54:15,606 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2880 transitions. [2022-11-02 20:54:15,606 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2880 transitions. [2022-11-02 20:54:15,607 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:54:15,607 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2880 transitions. [2022-11-02 20:54:15,612 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 320.0) internal successors, (2880), 9 states have internal predecessors, (2880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:15,645 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 398.0) internal successors, (3980), 10 states have internal predecessors, (3980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:15,646 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 398.0) internal successors, (3980), 10 states have internal predecessors, (3980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:15,647 INFO L175 Difference]: Start difference. First operand has 333 places, 334 transitions, 724 flow. Second operand 9 states and 2880 transitions. [2022-11-02 20:54:15,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 344 transitions, 796 flow [2022-11-02 20:54:15,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 344 transitions, 794 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-02 20:54:15,654 INFO L231 Difference]: Finished difference. Result has 343 places, 340 transitions, 772 flow [2022-11-02 20:54:15,655 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=398, PETRI_DIFFERENCE_MINUEND_FLOW=722, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=772, PETRI_PLACES=343, PETRI_TRANSITIONS=340} [2022-11-02 20:54:15,656 INFO L287 CegarLoopForPetriNet]: 330 programPoint places, 13 predicate places. [2022-11-02 20:54:15,656 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 340 transitions, 772 flow [2022-11-02 20:54:15,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 319.1) internal successors, (3191), 10 states have internal predecessors, (3191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:15,657 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:54:15,657 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:54:15,700 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5372df-1450-4794-aaf3-26ff7febfb1a/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-02 20:54:15,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5372df-1450-4794-aaf3-26ff7febfb1a/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:54:15,883 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-02 20:54:15,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:54:15,883 INFO L85 PathProgramCache]: Analyzing trace with hash 566379377, now seen corresponding path program 2 times [2022-11-02 20:54:15,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:54:15,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911230234] [2022-11-02 20:54:15,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:54:15,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:54:15,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:54:16,001 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:54:16,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:54:16,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911230234] [2022-11-02 20:54:16,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911230234] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:54:16,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95171953] [2022-11-02 20:54:16,002 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:54:16,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:54:16,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5372df-1450-4794-aaf3-26ff7febfb1a/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:54:16,007 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5372df-1450-4794-aaf3-26ff7febfb1a/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:54:16,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5372df-1450-4794-aaf3-26ff7febfb1a/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-02 20:54:16,122 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-02 20:54:16,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:54:16,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-02 20:54:16,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:54:16,180 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 7 treesize of output 6 [2022-11-02 20:54:16,338 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-02 20:54:16,338 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 11 treesize of output 11 [2022-11-02 20:54:16,387 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 13 treesize of output 15 [2022-11-02 20:54:16,493 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 14 treesize of output 10 [2022-11-02 20:54:16,564 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-02 20:54:16,564 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:54:16,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95171953] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:54:16,565 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:54:16,565 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [9] total 19 [2022-11-02 20:54:16,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664827101] [2022-11-02 20:54:16,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:54:16,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-02 20:54:16,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:54:16,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-02 20:54:16,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-11-02 20:54:16,570 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 265 out of 398 [2022-11-02 20:54:16,572 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 340 transitions, 772 flow. Second operand has 12 states, 12 states have (on average 267.3333333333333) internal successors, (3208), 12 states have internal predecessors, (3208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:16,573 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:54:16,573 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 265 of 398 [2022-11-02 20:54:16,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand