./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_11-ptr_racing.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bad9430c-d2ef-4a70-8231-523d6bc0f5a3/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bad9430c-d2ef-4a70-8231-523d6bc0f5a3/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bad9430c-d2ef-4a70-8231-523d6bc0f5a3/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bad9430c-d2ef-4a70-8231-523d6bc0f5a3/bin/uautomizer-tPACEb0tL8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_11-ptr_racing.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bad9430c-d2ef-4a70-8231-523d6bc0f5a3/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bad9430c-d2ef-4a70-8231-523d6bc0f5a3/bin/uautomizer-tPACEb0tL8 --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 265daba2b5ad7b4578f16c23ab641f7a5441c3a3894a2482737cba7b750ee6df --- 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-e04fb08 [2022-11-16 11:36:23,263 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 11:36:23,269 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 11:36:23,293 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 11:36:23,296 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 11:36:23,300 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 11:36:23,303 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 11:36:23,306 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 11:36:23,309 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 11:36:23,315 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 11:36:23,316 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 11:36:23,319 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 11:36:23,319 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 11:36:23,322 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 11:36:23,323 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 11:36:23,326 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 11:36:23,327 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 11:36:23,328 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 11:36:23,329 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 11:36:23,337 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 11:36:23,338 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 11:36:23,339 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 11:36:23,340 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 11:36:23,341 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 11:36:23,344 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 11:36:23,345 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 11:36:23,345 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 11:36:23,346 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 11:36:23,347 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 11:36:23,348 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 11:36:23,349 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 11:36:23,350 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 11:36:23,352 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 11:36:23,353 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 11:36:23,354 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 11:36:23,355 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 11:36:23,355 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 11:36:23,355 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 11:36:23,356 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 11:36:23,357 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 11:36:23,358 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 11:36:23,358 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bad9430c-d2ef-4a70-8231-523d6bc0f5a3/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-16 11:36:23,399 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 11:36:23,399 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 11:36:23,400 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 11:36:23,400 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 11:36:23,401 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 11:36:23,401 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 11:36:23,402 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 11:36:23,402 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 11:36:23,402 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 11:36:23,402 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 11:36:23,404 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 11:36:23,404 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 11:36:23,404 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 11:36:23,404 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 11:36:23,404 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 11:36:23,405 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 11:36:23,405 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 11:36:23,405 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 11:36:23,405 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 11:36:23,406 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 11:36:23,406 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 11:36:23,406 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 11:36:23,406 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 11:36:23,406 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 11:36:23,407 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:36:23,407 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 11:36:23,408 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 11:36:23,409 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 11:36:23,409 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 11:36:23,409 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 11:36:23,410 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-16 11:36:23,410 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-16 11:36:23,411 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 11:36:23,411 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_bad9430c-d2ef-4a70-8231-523d6bc0f5a3/bin/uautomizer-tPACEb0tL8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bad9430c-d2ef-4a70-8231-523d6bc0f5a3/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 265daba2b5ad7b4578f16c23ab641f7a5441c3a3894a2482737cba7b750ee6df [2022-11-16 11:36:23,730 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 11:36:23,763 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 11:36:23,765 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 11:36:23,767 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 11:36:23,768 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 11:36:23,769 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bad9430c-d2ef-4a70-8231-523d6bc0f5a3/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/goblint-regression/28-race_reach_11-ptr_racing.i [2022-11-16 11:36:23,855 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bad9430c-d2ef-4a70-8231-523d6bc0f5a3/bin/uautomizer-tPACEb0tL8/data/f22e1d357/2bdcda3e35ff46aeac60d42e23a9388c/FLAG627443723 [2022-11-16 11:36:24,512 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 11:36:24,512 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bad9430c-d2ef-4a70-8231-523d6bc0f5a3/sv-benchmarks/c/goblint-regression/28-race_reach_11-ptr_racing.i [2022-11-16 11:36:24,536 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bad9430c-d2ef-4a70-8231-523d6bc0f5a3/bin/uautomizer-tPACEb0tL8/data/f22e1d357/2bdcda3e35ff46aeac60d42e23a9388c/FLAG627443723 [2022-11-16 11:36:24,755 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bad9430c-d2ef-4a70-8231-523d6bc0f5a3/bin/uautomizer-tPACEb0tL8/data/f22e1d357/2bdcda3e35ff46aeac60d42e23a9388c [2022-11-16 11:36:24,758 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 11:36:24,759 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 11:36:24,761 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 11:36:24,761 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 11:36:24,766 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 11:36:24,767 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:36:24" (1/1) ... [2022-11-16 11:36:24,768 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ea79b69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:36:24, skipping insertion in model container [2022-11-16 11:36:24,769 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:36:24" (1/1) ... [2022-11-16 11:36:24,777 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 11:36:24,838 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 11:36:25,280 WARN L229 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_bad9430c-d2ef-4a70-8231-523d6bc0f5a3/sv-benchmarks/c/goblint-regression/28-race_reach_11-ptr_racing.i[30176,30189] [2022-11-16 11:36:25,320 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:36:25,333 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 11:36:25,391 WARN L229 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_bad9430c-d2ef-4a70-8231-523d6bc0f5a3/sv-benchmarks/c/goblint-regression/28-race_reach_11-ptr_racing.i[30176,30189] [2022-11-16 11:36:25,406 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:36:25,458 INFO L208 MainTranslator]: Completed translation [2022-11-16 11:36:25,459 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:36:25 WrapperNode [2022-11-16 11:36:25,459 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 11:36:25,460 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 11:36:25,460 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 11:36:25,460 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 11:36:25,468 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:36:25" (1/1) ... [2022-11-16 11:36:25,506 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:36:25" (1/1) ... [2022-11-16 11:36:25,542 INFO L138 Inliner]: procedures = 170, calls = 43, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 83 [2022-11-16 11:36:25,542 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 11:36:25,543 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 11:36:25,543 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 11:36:25,544 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 11:36:25,553 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:36:25" (1/1) ... [2022-11-16 11:36:25,554 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:36:25" (1/1) ... [2022-11-16 11:36:25,563 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:36:25" (1/1) ... [2022-11-16 11:36:25,563 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:36:25" (1/1) ... [2022-11-16 11:36:25,575 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:36:25" (1/1) ... [2022-11-16 11:36:25,579 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:36:25" (1/1) ... [2022-11-16 11:36:25,591 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:36:25" (1/1) ... [2022-11-16 11:36:25,593 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:36:25" (1/1) ... [2022-11-16 11:36:25,595 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 11:36:25,596 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 11:36:25,596 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 11:36:25,596 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 11:36:25,606 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:36:25" (1/1) ... [2022-11-16 11:36:25,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:36:25,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bad9430c-d2ef-4a70-8231-523d6bc0f5a3/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:36:25,648 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bad9430c-d2ef-4a70-8231-523d6bc0f5a3/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 11:36:25,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bad9430c-d2ef-4a70-8231-523d6bc0f5a3/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 11:36:25,708 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 11:36:25,708 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 11:36:25,709 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-16 11:36:25,709 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 11:36:25,709 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 11:36:25,709 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-11-16 11:36:25,709 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-11-16 11:36:25,710 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 11:36:25,710 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 11:36:25,710 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 11:36:25,710 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 11:36:25,712 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-16 11:36:25,875 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 11:36:25,877 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 11:36:26,186 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 11:36:26,196 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 11:36:26,196 INFO L300 CfgBuilder]: Removed 10 assume(true) statements. [2022-11-16 11:36:26,199 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:36:26 BoogieIcfgContainer [2022-11-16 11:36:26,200 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 11:36:26,202 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 11:36:26,203 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 11:36:26,207 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 11:36:26,208 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 11:36:24" (1/3) ... [2022-11-16 11:36:26,209 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5eb111b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:36:26, skipping insertion in model container [2022-11-16 11:36:26,209 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:36:25" (2/3) ... [2022-11-16 11:36:26,209 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5eb111b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:36:26, skipping insertion in model container [2022-11-16 11:36:26,210 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:36:26" (3/3) ... [2022-11-16 11:36:26,212 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_11-ptr_racing.i [2022-11-16 11:36:26,223 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-16 11:36:26,237 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 11:36:26,238 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 11:36:26,238 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-16 11:36:26,318 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-11-16 11:36:26,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 112 places, 121 transitions, 250 flow [2022-11-16 11:36:26,421 INFO L130 PetriNetUnfolder]: 17/159 cut-off events. [2022-11-16 11:36:26,422 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-16 11:36:26,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 165 conditions, 159 events. 17/159 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 382 event pairs, 0 based on Foata normal form. 0/137 useless extension candidates. Maximal degree in co-relation 76. Up to 4 conditions per place. [2022-11-16 11:36:26,428 INFO L82 GeneralOperation]: Start removeDead. Operand has 112 places, 121 transitions, 250 flow [2022-11-16 11:36:26,433 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 108 places, 116 transitions, 237 flow [2022-11-16 11:36:26,443 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 11:36:26,450 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;@5c05baa, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 11:36:26,450 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-16 11:36:26,473 INFO L130 PetriNetUnfolder]: 5/89 cut-off events. [2022-11-16 11:36:26,473 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-16 11:36:26,474 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:36:26,474 INFO L209 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] [2022-11-16 11:36:26,475 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:36:26,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:36:26,481 INFO L85 PathProgramCache]: Analyzing trace with hash -1801980909, now seen corresponding path program 1 times [2022-11-16 11:36:26,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:36:26,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100907744] [2022-11-16 11:36:26,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:36:26,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:36:26,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:36:26,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:26,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:36:26,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100907744] [2022-11-16 11:36:26,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100907744] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:36:26,790 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:36:26,791 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:36:26,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726169349] [2022-11-16 11:36:26,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:36:26,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-16 11:36:26,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:36:26,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-16 11:36:26,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 11:36:26,858 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 121 [2022-11-16 11:36:26,861 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 116 transitions, 237 flow. Second operand has 2 states, 2 states have (on average 107.5) internal successors, (215), 2 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:26,862 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:36:26,862 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 121 [2022-11-16 11:36:26,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:36:26,970 INFO L130 PetriNetUnfolder]: 0/136 cut-off events. [2022-11-16 11:36:26,970 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-16 11:36:26,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143 conditions, 136 events. 0/136 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 213 event pairs, 0 based on Foata normal form. 16/146 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2022-11-16 11:36:26,972 INFO L137 encePairwiseOnDemand]: 110/121 looper letters, 1 selfloop transitions, 0 changer transitions 16/104 dead transitions. [2022-11-16 11:36:26,973 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 104 transitions, 215 flow [2022-11-16 11:36:26,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-16 11:36:26,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-16 11:36:26,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 226 transitions. [2022-11-16 11:36:27,000 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9338842975206612 [2022-11-16 11:36:27,001 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 226 transitions. [2022-11-16 11:36:27,002 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 226 transitions. [2022-11-16 11:36:27,006 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:36:27,009 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 226 transitions. [2022-11-16 11:36:27,018 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 113.0) internal successors, (226), 2 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:27,026 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 121.0) internal successors, (363), 3 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:27,026 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 121.0) internal successors, (363), 3 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:27,030 INFO L175 Difference]: Start difference. First operand has 108 places, 116 transitions, 237 flow. Second operand 2 states and 226 transitions. [2022-11-16 11:36:27,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 104 transitions, 215 flow [2022-11-16 11:36:27,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 104 transitions, 215 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-16 11:36:27,041 INFO L231 Difference]: Finished difference. Result has 108 places, 88 transitions, 181 flow [2022-11-16 11:36:27,044 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=121, PETRI_DIFFERENCE_MINUEND_FLOW=213, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=181, PETRI_PLACES=108, PETRI_TRANSITIONS=88} [2022-11-16 11:36:27,050 INFO L288 CegarLoopForPetriNet]: 108 programPoint places, 0 predicate places. [2022-11-16 11:36:27,050 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 88 transitions, 181 flow [2022-11-16 11:36:27,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 107.5) internal successors, (215), 2 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:27,051 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:36:27,052 INFO L209 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] [2022-11-16 11:36:27,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 11:36:27,053 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:36:27,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:36:27,055 INFO L85 PathProgramCache]: Analyzing trace with hash -1672898190, now seen corresponding path program 1 times [2022-11-16 11:36:27,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:36:27,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432084857] [2022-11-16 11:36:27,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:36:27,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:36:27,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:36:27,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:27,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:36:27,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432084857] [2022-11-16 11:36:27,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432084857] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:36:27,296 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:36:27,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:36:27,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442960599] [2022-11-16 11:36:27,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:36:27,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:36:27,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:36:27,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:36:27,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:36:27,304 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 121 [2022-11-16 11:36:27,305 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 88 transitions, 181 flow. Second operand has 3 states, 3 states have (on average 101.0) internal successors, (303), 3 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:27,305 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:36:27,305 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 121 [2022-11-16 11:36:27,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:36:27,382 INFO L130 PetriNetUnfolder]: 0/92 cut-off events. [2022-11-16 11:36:27,382 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-16 11:36:27,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109 conditions, 92 events. 0/92 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 52 event pairs, 0 based on Foata normal form. 0/91 useless extension candidates. Maximal degree in co-relation 0. Up to 6 conditions per place. [2022-11-16 11:36:27,386 INFO L137 encePairwiseOnDemand]: 118/121 looper letters, 8 selfloop transitions, 2 changer transitions 0/90 dead transitions. [2022-11-16 11:36:27,387 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 90 transitions, 205 flow [2022-11-16 11:36:27,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:36:27,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-16 11:36:27,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 311 transitions. [2022-11-16 11:36:27,390 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8567493112947658 [2022-11-16 11:36:27,390 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 311 transitions. [2022-11-16 11:36:27,391 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 311 transitions. [2022-11-16 11:36:27,391 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:36:27,391 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 311 transitions. [2022-11-16 11:36:27,392 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 103.66666666666667) internal successors, (311), 3 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:27,394 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 121.0) internal successors, (484), 4 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:27,394 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 121.0) internal successors, (484), 4 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:27,394 INFO L175 Difference]: Start difference. First operand has 108 places, 88 transitions, 181 flow. Second operand 3 states and 311 transitions. [2022-11-16 11:36:27,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 90 transitions, 205 flow [2022-11-16 11:36:27,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 90 transitions, 205 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-16 11:36:27,397 INFO L231 Difference]: Finished difference. Result has 95 places, 88 transitions, 189 flow [2022-11-16 11:36:27,398 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=121, PETRI_DIFFERENCE_MINUEND_FLOW=181, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=189, PETRI_PLACES=95, PETRI_TRANSITIONS=88} [2022-11-16 11:36:27,399 INFO L288 CegarLoopForPetriNet]: 108 programPoint places, -13 predicate places. [2022-11-16 11:36:27,399 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 88 transitions, 189 flow [2022-11-16 11:36:27,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 101.0) internal successors, (303), 3 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:27,400 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:36:27,400 INFO L209 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, 1, 1, 1, 1, 1, 1] [2022-11-16 11:36:27,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 11:36:27,401 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:36:27,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:36:27,401 INFO L85 PathProgramCache]: Analyzing trace with hash 2088824035, now seen corresponding path program 1 times [2022-11-16 11:36:27,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:36:27,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508168302] [2022-11-16 11:36:27,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:36:27,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:36:27,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 11:36:27,454 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-16 11:36:27,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 11:36:27,508 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-16 11:36:27,508 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-16 11:36:27,509 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-16 11:36:27,514 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-16 11:36:27,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-16 11:36:27,515 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-11-16 11:36:27,519 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-16 11:36:27,519 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-16 11:36:27,553 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-16 11:36:27,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 142 places, 156 transitions, 330 flow [2022-11-16 11:36:27,629 INFO L130 PetriNetUnfolder]: 31/257 cut-off events. [2022-11-16 11:36:27,629 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-11-16 11:36:27,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 271 conditions, 257 events. 31/257 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 779 event pairs, 0 based on Foata normal form. 0/219 useless extension candidates. Maximal degree in co-relation 161. Up to 8 conditions per place. [2022-11-16 11:36:27,632 INFO L82 GeneralOperation]: Start removeDead. Operand has 142 places, 156 transitions, 330 flow [2022-11-16 11:36:27,634 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 142 places, 156 transitions, 330 flow [2022-11-16 11:36:27,635 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 11:36:27,636 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;@5c05baa, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 11:36:27,637 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-16 11:36:27,657 INFO L130 PetriNetUnfolder]: 3/85 cut-off events. [2022-11-16 11:36:27,657 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-16 11:36:27,657 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:36:27,658 INFO L209 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] [2022-11-16 11:36:27,658 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:36:27,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:36:27,664 INFO L85 PathProgramCache]: Analyzing trace with hash -1922344045, now seen corresponding path program 1 times [2022-11-16 11:36:27,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:36:27,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066251836] [2022-11-16 11:36:27,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:36:27,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:36:27,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:36:27,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:27,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:36:27,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066251836] [2022-11-16 11:36:27,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066251836] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:36:27,738 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:36:27,738 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:36:27,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43378579] [2022-11-16 11:36:27,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:36:27,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-16 11:36:27,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:36:27,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-16 11:36:27,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 11:36:27,742 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 156 [2022-11-16 11:36:27,743 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 156 transitions, 330 flow. Second operand has 2 states, 2 states have (on average 134.5) internal successors, (269), 2 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:27,743 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:36:27,743 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 156 [2022-11-16 11:36:27,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:36:27,805 INFO L130 PetriNetUnfolder]: 3/226 cut-off events. [2022-11-16 11:36:27,805 INFO L131 PetriNetUnfolder]: For 21/27 co-relation queries the response was YES. [2022-11-16 11:36:27,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 247 conditions, 226 events. 3/226 cut-off events. For 21/27 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 571 event pairs, 0 based on Foata normal form. 42/258 useless extension candidates. Maximal degree in co-relation 145. Up to 7 conditions per place. [2022-11-16 11:36:27,809 INFO L137 encePairwiseOnDemand]: 139/156 looper letters, 2 selfloop transitions, 0 changer transitions 22/138 dead transitions. [2022-11-16 11:36:27,809 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 138 transitions, 302 flow [2022-11-16 11:36:27,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-16 11:36:27,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-16 11:36:27,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 289 transitions. [2022-11-16 11:36:27,813 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9262820512820513 [2022-11-16 11:36:27,814 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 289 transitions. [2022-11-16 11:36:27,814 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 289 transitions. [2022-11-16 11:36:27,814 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:36:27,814 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 289 transitions. [2022-11-16 11:36:27,816 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 144.5) internal successors, (289), 2 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:27,819 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 156.0) internal successors, (468), 3 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:27,819 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 156.0) internal successors, (468), 3 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:27,819 INFO L175 Difference]: Start difference. First operand has 142 places, 156 transitions, 330 flow. Second operand 2 states and 289 transitions. [2022-11-16 11:36:27,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 138 transitions, 302 flow [2022-11-16 11:36:27,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 138 transitions, 302 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-16 11:36:27,827 INFO L231 Difference]: Finished difference. Result has 142 places, 116 transitions, 244 flow [2022-11-16 11:36:27,827 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=294, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=244, PETRI_PLACES=142, PETRI_TRANSITIONS=116} [2022-11-16 11:36:27,830 INFO L288 CegarLoopForPetriNet]: 142 programPoint places, 0 predicate places. [2022-11-16 11:36:27,830 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 116 transitions, 244 flow [2022-11-16 11:36:27,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 134.5) internal successors, (269), 2 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:27,831 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:36:27,831 INFO L209 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] [2022-11-16 11:36:27,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-16 11:36:27,831 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:36:27,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:36:27,832 INFO L85 PathProgramCache]: Analyzing trace with hash -1793261326, now seen corresponding path program 1 times [2022-11-16 11:36:27,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:36:27,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808752327] [2022-11-16 11:36:27,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:36:27,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:36:27,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:36:27,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:27,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:36:27,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808752327] [2022-11-16 11:36:27,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808752327] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:36:27,919 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:36:27,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:36:27,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127214452] [2022-11-16 11:36:27,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:36:27,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:36:27,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:36:27,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:36:27,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:36:27,922 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 156 [2022-11-16 11:36:27,923 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 116 transitions, 244 flow. Second operand has 3 states, 3 states have (on average 128.0) internal successors, (384), 3 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:27,923 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:36:27,923 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 156 [2022-11-16 11:36:27,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:36:27,982 INFO L130 PetriNetUnfolder]: 0/141 cut-off events. [2022-11-16 11:36:27,982 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-16 11:36:27,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 169 conditions, 141 events. 0/141 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 214 event pairs, 0 based on Foata normal form. 0/139 useless extension candidates. Maximal degree in co-relation 0. Up to 12 conditions per place. [2022-11-16 11:36:27,983 INFO L137 encePairwiseOnDemand]: 153/156 looper letters, 11 selfloop transitions, 2 changer transitions 0/120 dead transitions. [2022-11-16 11:36:27,984 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 120 transitions, 278 flow [2022-11-16 11:36:27,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:36:27,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-16 11:36:27,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 395 transitions. [2022-11-16 11:36:27,986 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.844017094017094 [2022-11-16 11:36:27,986 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 395 transitions. [2022-11-16 11:36:27,986 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 395 transitions. [2022-11-16 11:36:27,986 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:36:27,987 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 395 transitions. [2022-11-16 11:36:27,988 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 131.66666666666666) internal successors, (395), 3 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:27,989 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 156.0) internal successors, (624), 4 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:27,990 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 156.0) internal successors, (624), 4 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:27,990 INFO L175 Difference]: Start difference. First operand has 142 places, 116 transitions, 244 flow. Second operand 3 states and 395 transitions. [2022-11-16 11:36:27,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 120 transitions, 278 flow [2022-11-16 11:36:27,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 120 transitions, 276 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-11-16 11:36:27,993 INFO L231 Difference]: Finished difference. Result has 125 places, 117 transitions, 254 flow [2022-11-16 11:36:27,994 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=254, PETRI_PLACES=125, PETRI_TRANSITIONS=117} [2022-11-16 11:36:27,995 INFO L288 CegarLoopForPetriNet]: 142 programPoint places, -17 predicate places. [2022-11-16 11:36:27,995 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 117 transitions, 254 flow [2022-11-16 11:36:27,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 128.0) internal successors, (384), 3 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:27,996 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:36:27,996 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:36:27,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-16 11:36:27,996 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:36:27,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:36:27,997 INFO L85 PathProgramCache]: Analyzing trace with hash 343898309, now seen corresponding path program 1 times [2022-11-16 11:36:27,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:36:27,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135916784] [2022-11-16 11:36:27,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:36:27,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:36:28,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:36:28,173 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:28,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:36:28,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135916784] [2022-11-16 11:36:28,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135916784] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:36:28,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597982500] [2022-11-16 11:36:28,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:36:28,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:36:28,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bad9430c-d2ef-4a70-8231-523d6bc0f5a3/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:36:28,187 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bad9430c-d2ef-4a70-8231-523d6bc0f5a3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:36:28,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bad9430c-d2ef-4a70-8231-523d6bc0f5a3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 11:36:28,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:36:28,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 11:36:28,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:36:28,371 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:28,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:36:28,422 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:28,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597982500] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:36:28,423 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:36:28,423 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-16 11:36:28,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662175754] [2022-11-16 11:36:28,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:36:28,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 11:36:28,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:36:28,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 11:36:28,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:36:28,428 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 156 [2022-11-16 11:36:28,430 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 117 transitions, 254 flow. Second operand has 10 states, 10 states have (on average 128.3) internal successors, (1283), 10 states have internal predecessors, (1283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:28,430 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:36:28,430 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 156 [2022-11-16 11:36:28,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:36:28,521 INFO L130 PetriNetUnfolder]: 0/117 cut-off events. [2022-11-16 11:36:28,522 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-16 11:36:28,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 150 conditions, 117 events. 0/117 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 93 event pairs, 0 based on Foata normal form. 2/119 useless extension candidates. Maximal degree in co-relation 0. Up to 4 conditions per place. [2022-11-16 11:36:28,522 INFO L137 encePairwiseOnDemand]: 151/156 looper letters, 9 selfloop transitions, 7 changer transitions 0/111 dead transitions. [2022-11-16 11:36:28,522 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 111 transitions, 272 flow [2022-11-16 11:36:28,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 11:36:28,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-16 11:36:28,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1152 transitions. [2022-11-16 11:36:28,526 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8205128205128205 [2022-11-16 11:36:28,526 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1152 transitions. [2022-11-16 11:36:28,526 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1152 transitions. [2022-11-16 11:36:28,527 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:36:28,527 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1152 transitions. [2022-11-16 11:36:28,530 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 128.0) internal successors, (1152), 9 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:28,533 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 156.0) internal successors, (1560), 10 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:28,534 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 156.0) internal successors, (1560), 10 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:28,534 INFO L175 Difference]: Start difference. First operand has 125 places, 117 transitions, 254 flow. Second operand 9 states and 1152 transitions. [2022-11-16 11:36:28,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 111 transitions, 272 flow [2022-11-16 11:36:28,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 111 transitions, 270 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-16 11:36:28,538 INFO L231 Difference]: Finished difference. Result has 120 places, 107 transitions, 244 flow [2022-11-16 11:36:28,538 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=244, PETRI_PLACES=120, PETRI_TRANSITIONS=107} [2022-11-16 11:36:28,539 INFO L288 CegarLoopForPetriNet]: 142 programPoint places, -22 predicate places. [2022-11-16 11:36:28,539 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 107 transitions, 244 flow [2022-11-16 11:36:28,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 128.3) internal successors, (1283), 10 states have internal predecessors, (1283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:28,540 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:36:28,548 INFO L209 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, 1, 1, 1, 1, 1, 1] [2022-11-16 11:36:28,559 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bad9430c-d2ef-4a70-8231-523d6bc0f5a3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-16 11:36:28,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bad9430c-d2ef-4a70-8231-523d6bc0f5a3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:36:28,754 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:36:28,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:36:28,754 INFO L85 PathProgramCache]: Analyzing trace with hash 1209172879, now seen corresponding path program 1 times [2022-11-16 11:36:28,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:36:28,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369143207] [2022-11-16 11:36:28,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:36:28,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:36:28,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 11:36:28,778 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-16 11:36:28,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 11:36:28,798 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-16 11:36:28,798 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-16 11:36:28,798 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-16 11:36:28,798 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-16 11:36:28,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-16 11:36:28,799 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-11-16 11:36:28,799 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-16 11:36:28,800 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-11-16 11:36:28,829 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-16 11:36:28,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 172 places, 191 transitions, 412 flow [2022-11-16 11:36:28,900 INFO L130 PetriNetUnfolder]: 50/388 cut-off events. [2022-11-16 11:36:28,900 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-11-16 11:36:28,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 416 conditions, 388 events. 50/388 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1354 event pairs, 1 based on Foata normal form. 0/330 useless extension candidates. Maximal degree in co-relation 265. Up to 16 conditions per place. [2022-11-16 11:36:28,905 INFO L82 GeneralOperation]: Start removeDead. Operand has 172 places, 191 transitions, 412 flow [2022-11-16 11:36:28,909 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 172 places, 191 transitions, 412 flow [2022-11-16 11:36:28,912 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 11:36:28,920 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;@5c05baa, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 11:36:28,920 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-16 11:36:28,932 INFO L130 PetriNetUnfolder]: 3/85 cut-off events. [2022-11-16 11:36:28,932 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-16 11:36:28,933 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:36:28,933 INFO L209 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] [2022-11-16 11:36:28,933 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:36:28,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:36:28,945 INFO L85 PathProgramCache]: Analyzing trace with hash 711004275, now seen corresponding path program 1 times [2022-11-16 11:36:28,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:36:28,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609672051] [2022-11-16 11:36:28,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:36:28,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:36:28,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:36:28,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:28,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:36:28,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609672051] [2022-11-16 11:36:28,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609672051] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:36:28,987 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:36:28,987 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:36:28,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914585789] [2022-11-16 11:36:28,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:36:28,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-16 11:36:28,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:36:28,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-16 11:36:28,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 11:36:28,992 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 191 [2022-11-16 11:36:28,993 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 191 transitions, 412 flow. Second operand has 2 states, 2 states have (on average 161.5) internal successors, (323), 2 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:28,993 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:36:28,994 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 191 [2022-11-16 11:36:28,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:36:29,075 INFO L130 PetriNetUnfolder]: 8/342 cut-off events. [2022-11-16 11:36:29,075 INFO L131 PetriNetUnfolder]: For 53/63 co-relation queries the response was YES. [2022-11-16 11:36:29,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 386 conditions, 342 events. 8/342 cut-off events. For 53/63 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 1090 event pairs, 1 based on Foata normal form. 104/430 useless extension candidates. Maximal degree in co-relation 240. Up to 16 conditions per place. [2022-11-16 11:36:29,078 INFO L137 encePairwiseOnDemand]: 168/191 looper letters, 3 selfloop transitions, 0 changer transitions 23/167 dead transitions. [2022-11-16 11:36:29,078 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 167 transitions, 376 flow [2022-11-16 11:36:29,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-16 11:36:29,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-16 11:36:29,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 351 transitions. [2022-11-16 11:36:29,080 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.918848167539267 [2022-11-16 11:36:29,080 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 351 transitions. [2022-11-16 11:36:29,080 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 351 transitions. [2022-11-16 11:36:29,081 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:36:29,081 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 351 transitions. [2022-11-16 11:36:29,082 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 175.5) internal successors, (351), 2 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:29,083 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 191.0) internal successors, (573), 3 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:29,083 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 191.0) internal successors, (573), 3 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:29,083 INFO L175 Difference]: Start difference. First operand has 172 places, 191 transitions, 412 flow. Second operand 2 states and 351 transitions. [2022-11-16 11:36:29,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 167 transitions, 376 flow [2022-11-16 11:36:29,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 167 transitions, 376 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-16 11:36:29,087 INFO L231 Difference]: Finished difference. Result has 172 places, 144 transitions, 309 flow [2022-11-16 11:36:29,088 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=191, PETRI_DIFFERENCE_MINUEND_FLOW=364, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=309, PETRI_PLACES=172, PETRI_TRANSITIONS=144} [2022-11-16 11:36:29,088 INFO L288 CegarLoopForPetriNet]: 172 programPoint places, 0 predicate places. [2022-11-16 11:36:29,088 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 144 transitions, 309 flow [2022-11-16 11:36:29,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 161.5) internal successors, (323), 2 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:29,089 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:36:29,089 INFO L209 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] [2022-11-16 11:36:29,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-16 11:36:29,089 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:36:29,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:36:29,090 INFO L85 PathProgramCache]: Analyzing trace with hash 840086994, now seen corresponding path program 1 times [2022-11-16 11:36:29,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:36:29,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854285543] [2022-11-16 11:36:29,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:36:29,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:36:29,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:36:29,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:29,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:36:29,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854285543] [2022-11-16 11:36:29,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854285543] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:36:29,132 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:36:29,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:36:29,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941415976] [2022-11-16 11:36:29,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:36:29,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:36:29,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:36:29,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:36:29,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:36:29,134 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 191 [2022-11-16 11:36:29,135 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 144 transitions, 309 flow. Second operand has 3 states, 3 states have (on average 155.0) internal successors, (465), 3 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:29,135 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:36:29,135 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 191 [2022-11-16 11:36:29,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:36:29,186 INFO L130 PetriNetUnfolder]: 0/190 cut-off events. [2022-11-16 11:36:29,186 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-16 11:36:29,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 230 conditions, 190 events. 0/190 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 399 event pairs, 0 based on Foata normal form. 0/187 useless extension candidates. Maximal degree in co-relation 0. Up to 18 conditions per place. [2022-11-16 11:36:29,187 INFO L137 encePairwiseOnDemand]: 188/191 looper letters, 12 selfloop transitions, 2 changer transitions 0/148 dead transitions. [2022-11-16 11:36:29,187 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 148 transitions, 345 flow [2022-11-16 11:36:29,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:36:29,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-16 11:36:29,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 477 transitions. [2022-11-16 11:36:29,189 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8324607329842932 [2022-11-16 11:36:29,189 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 477 transitions. [2022-11-16 11:36:29,189 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 477 transitions. [2022-11-16 11:36:29,189 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:36:29,190 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 477 transitions. [2022-11-16 11:36:29,191 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 159.0) internal successors, (477), 3 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:29,192 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:29,192 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:29,193 INFO L175 Difference]: Start difference. First operand has 172 places, 144 transitions, 309 flow. Second operand 3 states and 477 transitions. [2022-11-16 11:36:29,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 148 transitions, 345 flow [2022-11-16 11:36:29,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 148 transitions, 339 flow, removed 3 selfloop flow, removed 0 redundant places. [2022-11-16 11:36:29,196 INFO L231 Difference]: Finished difference. Result has 155 places, 145 transitions, 315 flow [2022-11-16 11:36:29,197 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=191, PETRI_DIFFERENCE_MINUEND_FLOW=303, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=315, PETRI_PLACES=155, PETRI_TRANSITIONS=145} [2022-11-16 11:36:29,197 INFO L288 CegarLoopForPetriNet]: 172 programPoint places, -17 predicate places. [2022-11-16 11:36:29,197 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 145 transitions, 315 flow [2022-11-16 11:36:29,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 155.0) internal successors, (465), 3 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:29,198 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:36:29,198 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:36:29,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-16 11:36:29,198 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:36:29,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:36:29,199 INFO L85 PathProgramCache]: Analyzing trace with hash 1530561284, now seen corresponding path program 1 times [2022-11-16 11:36:29,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:36:29,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779284007] [2022-11-16 11:36:29,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:36:29,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:36:29,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:36:29,337 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:29,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:36:29,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779284007] [2022-11-16 11:36:29,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779284007] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:36:29,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159269110] [2022-11-16 11:36:29,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:36:29,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:36:29,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bad9430c-d2ef-4a70-8231-523d6bc0f5a3/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:36:29,342 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bad9430c-d2ef-4a70-8231-523d6bc0f5a3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:36:29,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bad9430c-d2ef-4a70-8231-523d6bc0f5a3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 11:36:29,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:36:29,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 11:36:29,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:36:29,488 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:29,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:36:29,548 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:29,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159269110] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:36:29,549 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:36:29,549 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-16 11:36:29,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977857774] [2022-11-16 11:36:29,550 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:36:29,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 11:36:29,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:36:29,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 11:36:29,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:36:29,553 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 191 [2022-11-16 11:36:29,555 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 145 transitions, 315 flow. Second operand has 10 states, 10 states have (on average 155.3) internal successors, (1553), 10 states have internal predecessors, (1553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:29,555 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:36:29,555 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 191 [2022-11-16 11:36:29,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:36:29,687 INFO L130 PetriNetUnfolder]: 0/166 cut-off events. [2022-11-16 11:36:29,687 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-11-16 11:36:29,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 212 conditions, 166 events. 0/166 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 255 event pairs, 0 based on Foata normal form. 2/168 useless extension candidates. Maximal degree in co-relation 0. Up to 7 conditions per place. [2022-11-16 11:36:29,688 INFO L137 encePairwiseOnDemand]: 185/191 looper letters, 13 selfloop transitions, 9 changer transitions 0/155 dead transitions. [2022-11-16 11:36:29,689 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 155 transitions, 381 flow [2022-11-16 11:36:29,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 11:36:29,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-16 11:36:29,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1401 transitions. [2022-11-16 11:36:29,693 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8150087260034904 [2022-11-16 11:36:29,693 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1401 transitions. [2022-11-16 11:36:29,693 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1401 transitions. [2022-11-16 11:36:29,694 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:36:29,694 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1401 transitions. [2022-11-16 11:36:29,697 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 155.66666666666666) internal successors, (1401), 9 states have internal predecessors, (1401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:29,700 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 191.0) internal successors, (1910), 10 states have internal predecessors, (1910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:29,701 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 191.0) internal successors, (1910), 10 states have internal predecessors, (1910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:29,701 INFO L175 Difference]: Start difference. First operand has 155 places, 145 transitions, 315 flow. Second operand 9 states and 1401 transitions. [2022-11-16 11:36:29,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 155 transitions, 381 flow [2022-11-16 11:36:29,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 155 transitions, 379 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-16 11:36:29,707 INFO L231 Difference]: Finished difference. Result has 165 places, 151 transitions, 363 flow [2022-11-16 11:36:29,708 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=191, PETRI_DIFFERENCE_MINUEND_FLOW=313, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=363, PETRI_PLACES=165, PETRI_TRANSITIONS=151} [2022-11-16 11:36:29,711 INFO L288 CegarLoopForPetriNet]: 172 programPoint places, -7 predicate places. [2022-11-16 11:36:29,711 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 151 transitions, 363 flow [2022-11-16 11:36:29,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 155.3) internal successors, (1553), 10 states have internal predecessors, (1553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:29,712 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:36:29,712 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 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] [2022-11-16 11:36:29,727 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bad9430c-d2ef-4a70-8231-523d6bc0f5a3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 11:36:29,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bad9430c-d2ef-4a70-8231-523d6bc0f5a3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:36:29,918 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:36:29,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:36:29,919 INFO L85 PathProgramCache]: Analyzing trace with hash 18491681, now seen corresponding path program 1 times [2022-11-16 11:36:29,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:36:29,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22171556] [2022-11-16 11:36:29,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:36:29,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:36:29,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 11:36:29,959 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-16 11:36:29,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 11:36:30,004 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-16 11:36:30,005 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-16 11:36:30,005 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-16 11:36:30,006 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-16 11:36:30,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-16 11:36:30,006 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-11-16 11:36:30,008 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-16 11:36:30,008 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-11-16 11:36:30,055 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-11-16 11:36:30,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 202 places, 226 transitions, 496 flow [2022-11-16 11:36:30,168 INFO L130 PetriNetUnfolder]: 81/587 cut-off events. [2022-11-16 11:36:30,168 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-11-16 11:36:30,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 642 conditions, 587 events. 81/587 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2294 event pairs, 6 based on Foata normal form. 0/501 useless extension candidates. Maximal degree in co-relation 408. Up to 32 conditions per place. [2022-11-16 11:36:30,178 INFO L82 GeneralOperation]: Start removeDead. Operand has 202 places, 226 transitions, 496 flow [2022-11-16 11:36:30,184 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 202 places, 226 transitions, 496 flow [2022-11-16 11:36:30,185 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 11:36:30,186 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;@5c05baa, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 11:36:30,186 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-16 11:36:30,195 INFO L130 PetriNetUnfolder]: 5/92 cut-off events. [2022-11-16 11:36:30,195 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-16 11:36:30,195 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:36:30,196 INFO L209 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] [2022-11-16 11:36:30,196 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:36:30,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:36:30,197 INFO L85 PathProgramCache]: Analyzing trace with hash 1803096755, now seen corresponding path program 1 times [2022-11-16 11:36:30,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:36:30,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483737823] [2022-11-16 11:36:30,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:36:30,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:36:30,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:36:30,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:30,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:36:30,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483737823] [2022-11-16 11:36:30,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483737823] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:36:30,222 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:36:30,222 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:36:30,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445039113] [2022-11-16 11:36:30,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:36:30,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-16 11:36:30,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:36:30,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-16 11:36:30,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 11:36:30,224 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 226 [2022-11-16 11:36:30,225 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 226 transitions, 496 flow. Second operand has 2 states, 2 states have (on average 188.5) internal successors, (377), 2 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:30,225 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:36:30,226 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 226 [2022-11-16 11:36:30,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:36:30,385 INFO L130 PetriNetUnfolder]: 21/522 cut-off events. [2022-11-16 11:36:30,385 INFO L131 PetriNetUnfolder]: For 126/140 co-relation queries the response was YES. [2022-11-16 11:36:30,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 614 conditions, 522 events. 21/522 cut-off events. For 126/140 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 2079 event pairs, 6 based on Foata normal form. 248/744 useless extension candidates. Maximal degree in co-relation 377. Up to 37 conditions per place. [2022-11-16 11:36:30,391 INFO L137 encePairwiseOnDemand]: 197/226 looper letters, 4 selfloop transitions, 0 changer transitions 24/196 dead transitions. [2022-11-16 11:36:30,391 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 196 transitions, 452 flow [2022-11-16 11:36:30,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-16 11:36:30,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-16 11:36:30,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 413 transitions. [2022-11-16 11:36:30,393 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9137168141592921 [2022-11-16 11:36:30,394 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 413 transitions. [2022-11-16 11:36:30,394 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 413 transitions. [2022-11-16 11:36:30,394 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:36:30,394 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 413 transitions. [2022-11-16 11:36:30,395 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 206.5) internal successors, (413), 2 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:30,398 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 226.0) internal successors, (678), 3 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:30,399 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 226.0) internal successors, (678), 3 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:30,401 INFO L175 Difference]: Start difference. First operand has 202 places, 226 transitions, 496 flow. Second operand 2 states and 413 transitions. [2022-11-16 11:36:30,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 196 transitions, 452 flow [2022-11-16 11:36:30,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 196 transitions, 452 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-16 11:36:30,407 INFO L231 Difference]: Finished difference. Result has 202 places, 172 transitions, 376 flow [2022-11-16 11:36:30,408 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=436, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=376, PETRI_PLACES=202, PETRI_TRANSITIONS=172} [2022-11-16 11:36:30,409 INFO L288 CegarLoopForPetriNet]: 202 programPoint places, 0 predicate places. [2022-11-16 11:36:30,410 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 172 transitions, 376 flow [2022-11-16 11:36:30,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 188.5) internal successors, (377), 2 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:30,410 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:36:30,410 INFO L209 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] [2022-11-16 11:36:30,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-16 11:36:30,411 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:36:30,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:36:30,411 INFO L85 PathProgramCache]: Analyzing trace with hash 1932179474, now seen corresponding path program 1 times [2022-11-16 11:36:30,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:36:30,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520680804] [2022-11-16 11:36:30,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:36:30,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:36:30,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:36:30,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:30,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:36:30,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520680804] [2022-11-16 11:36:30,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520680804] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:36:30,468 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:36:30,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:36:30,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295193659] [2022-11-16 11:36:30,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:36:30,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:36:30,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:36:30,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:36:30,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:36:30,471 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 226 [2022-11-16 11:36:30,472 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 172 transitions, 376 flow. Second operand has 3 states, 3 states have (on average 182.0) internal successors, (546), 3 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:30,472 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:36:30,472 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 226 [2022-11-16 11:36:30,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:36:30,545 INFO L130 PetriNetUnfolder]: 0/239 cut-off events. [2022-11-16 11:36:30,546 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-11-16 11:36:30,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 292 conditions, 239 events. 0/239 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 585 event pairs, 0 based on Foata normal form. 0/235 useless extension candidates. Maximal degree in co-relation 0. Up to 24 conditions per place. [2022-11-16 11:36:30,547 INFO L137 encePairwiseOnDemand]: 223/226 looper letters, 13 selfloop transitions, 2 changer transitions 0/176 dead transitions. [2022-11-16 11:36:30,548 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 176 transitions, 414 flow [2022-11-16 11:36:30,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:36:30,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-16 11:36:30,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 559 transitions. [2022-11-16 11:36:30,550 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8244837758112095 [2022-11-16 11:36:30,550 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 559 transitions. [2022-11-16 11:36:30,551 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 559 transitions. [2022-11-16 11:36:30,551 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:36:30,551 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 559 transitions. [2022-11-16 11:36:30,553 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 186.33333333333334) internal successors, (559), 3 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:30,555 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 226.0) internal successors, (904), 4 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:30,556 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 226.0) internal successors, (904), 4 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:30,557 INFO L175 Difference]: Start difference. First operand has 202 places, 172 transitions, 376 flow. Second operand 3 states and 559 transitions. [2022-11-16 11:36:30,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 176 transitions, 414 flow [2022-11-16 11:36:30,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 176 transitions, 402 flow, removed 6 selfloop flow, removed 0 redundant places. [2022-11-16 11:36:30,562 INFO L231 Difference]: Finished difference. Result has 185 places, 173 transitions, 376 flow [2022-11-16 11:36:30,563 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=364, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=376, PETRI_PLACES=185, PETRI_TRANSITIONS=173} [2022-11-16 11:36:30,564 INFO L288 CegarLoopForPetriNet]: 202 programPoint places, -17 predicate places. [2022-11-16 11:36:30,565 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 173 transitions, 376 flow [2022-11-16 11:36:30,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 182.0) internal successors, (546), 3 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:30,565 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:36:30,566 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:36:30,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-16 11:36:30,566 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:36:30,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:36:30,567 INFO L85 PathProgramCache]: Analyzing trace with hash -75577213, now seen corresponding path program 1 times [2022-11-16 11:36:30,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:36:30,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025026065] [2022-11-16 11:36:30,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:36:30,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:36:30,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:36:30,661 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:30,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:36:30,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025026065] [2022-11-16 11:36:30,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025026065] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:36:30,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464114530] [2022-11-16 11:36:30,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:36:30,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:36:30,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bad9430c-d2ef-4a70-8231-523d6bc0f5a3/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:36:30,664 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bad9430c-d2ef-4a70-8231-523d6bc0f5a3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:36:30,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bad9430c-d2ef-4a70-8231-523d6bc0f5a3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 11:36:30,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:36:30,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 11:36:30,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:36:30,867 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:30,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:36:30,920 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:30,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464114530] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:36:30,921 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:36:30,921 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-16 11:36:30,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104410096] [2022-11-16 11:36:30,924 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:36:30,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 11:36:30,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:36:30,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 11:36:30,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:36:30,928 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 226 [2022-11-16 11:36:30,931 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 173 transitions, 376 flow. Second operand has 10 states, 10 states have (on average 182.3) internal successors, (1823), 10 states have internal predecessors, (1823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:30,931 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:36:30,931 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 226 [2022-11-16 11:36:30,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:36:31,059 INFO L130 PetriNetUnfolder]: 0/215 cut-off events. [2022-11-16 11:36:31,059 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-11-16 11:36:31,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 274 conditions, 215 events. 0/215 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 439 event pairs, 0 based on Foata normal form. 2/217 useless extension candidates. Maximal degree in co-relation 0. Up to 11 conditions per place. [2022-11-16 11:36:31,061 INFO L137 encePairwiseOnDemand]: 220/226 looper letters, 14 selfloop transitions, 9 changer transitions 0/183 dead transitions. [2022-11-16 11:36:31,061 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 183 transitions, 444 flow [2022-11-16 11:36:31,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 11:36:31,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-16 11:36:31,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1645 transitions. [2022-11-16 11:36:31,066 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8087512291052114 [2022-11-16 11:36:31,066 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1645 transitions. [2022-11-16 11:36:31,067 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1645 transitions. [2022-11-16 11:36:31,068 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:36:31,068 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1645 transitions. [2022-11-16 11:36:31,072 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 182.77777777777777) internal successors, (1645), 9 states have internal predecessors, (1645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:31,078 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 226.0) internal successors, (2260), 10 states have internal predecessors, (2260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:31,079 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 226.0) internal successors, (2260), 10 states have internal predecessors, (2260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:31,080 INFO L175 Difference]: Start difference. First operand has 185 places, 173 transitions, 376 flow. Second operand 9 states and 1645 transitions. [2022-11-16 11:36:31,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 183 transitions, 444 flow [2022-11-16 11:36:31,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 183 transitions, 442 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-16 11:36:31,090 INFO L231 Difference]: Finished difference. Result has 195 places, 179 transitions, 424 flow [2022-11-16 11:36:31,091 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=374, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=424, PETRI_PLACES=195, PETRI_TRANSITIONS=179} [2022-11-16 11:36:31,092 INFO L288 CegarLoopForPetriNet]: 202 programPoint places, -7 predicate places. [2022-11-16 11:36:31,092 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 179 transitions, 424 flow [2022-11-16 11:36:31,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 182.3) internal successors, (1823), 10 states have internal predecessors, (1823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:31,094 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:36:31,094 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 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] [2022-11-16 11:36:31,106 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bad9430c-d2ef-4a70-8231-523d6bc0f5a3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 11:36:31,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bad9430c-d2ef-4a70-8231-523d6bc0f5a3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:36:31,301 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:36:31,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:36:31,302 INFO L85 PathProgramCache]: Analyzing trace with hash -568919742, now seen corresponding path program 1 times [2022-11-16 11:36:31,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:36:31,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614764473] [2022-11-16 11:36:31,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:36:31,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:36:31,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:36:31,524 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:31,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:36:31,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614764473] [2022-11-16 11:36:31,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614764473] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:36:31,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683308953] [2022-11-16 11:36:31,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:36:31,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:36:31,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bad9430c-d2ef-4a70-8231-523d6bc0f5a3/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:36:31,527 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bad9430c-d2ef-4a70-8231-523d6bc0f5a3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:36:31,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bad9430c-d2ef-4a70-8231-523d6bc0f5a3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 11:36:31,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:36:31,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 11:36:31,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:36:31,773 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:31,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:36:31,926 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:31,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683308953] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:36:31,927 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:36:31,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-16 11:36:31,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715362951] [2022-11-16 11:36:31,928 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:36:31,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-16 11:36:31,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:36:31,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-16 11:36:31,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-16 11:36:31,933 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 226 [2022-11-16 11:36:31,937 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 179 transitions, 424 flow. Second operand has 18 states, 18 states have (on average 182.61111111111111) internal successors, (3287), 18 states have internal predecessors, (3287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:31,937 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:36:31,937 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 226 [2022-11-16 11:36:31,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:36:32,135 INFO L130 PetriNetUnfolder]: 0/191 cut-off events. [2022-11-16 11:36:32,136 INFO L131 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2022-11-16 11:36:32,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 271 conditions, 191 events. 0/191 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 301 event pairs, 0 based on Foata normal form. 2/193 useless extension candidates. Maximal degree in co-relation 0. Up to 6 conditions per place. [2022-11-16 11:36:32,137 INFO L137 encePairwiseOnDemand]: 221/226 looper letters, 15 selfloop transitions, 13 changer transitions 0/177 dead transitions. [2022-11-16 11:36:32,137 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 177 transitions, 488 flow [2022-11-16 11:36:32,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-16 11:36:32,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-11-16 11:36:32,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2730 transitions. [2022-11-16 11:36:32,143 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8053097345132744 [2022-11-16 11:36:32,143 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2730 transitions. [2022-11-16 11:36:32,143 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2730 transitions. [2022-11-16 11:36:32,145 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:36:32,145 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2730 transitions. [2022-11-16 11:36:32,150 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 182.0) internal successors, (2730), 15 states have internal predecessors, (2730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:32,157 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 226.0) internal successors, (3616), 16 states have internal predecessors, (3616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:32,159 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 226.0) internal successors, (3616), 16 states have internal predecessors, (3616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:32,159 INFO L175 Difference]: Start difference. First operand has 195 places, 179 transitions, 424 flow. Second operand 15 states and 2730 transitions. [2022-11-16 11:36:32,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 177 transitions, 488 flow [2022-11-16 11:36:32,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 177 transitions, 471 flow, removed 3 selfloop flow, removed 4 redundant places. [2022-11-16 11:36:32,163 INFO L231 Difference]: Finished difference. Result has 193 places, 170 transitions, 420 flow [2022-11-16 11:36:32,164 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=381, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=420, PETRI_PLACES=193, PETRI_TRANSITIONS=170} [2022-11-16 11:36:32,165 INFO L288 CegarLoopForPetriNet]: 202 programPoint places, -9 predicate places. [2022-11-16 11:36:32,165 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 170 transitions, 420 flow [2022-11-16 11:36:32,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 182.61111111111111) internal successors, (3287), 18 states have internal predecessors, (3287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:32,167 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:36:32,167 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:36:32,178 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bad9430c-d2ef-4a70-8231-523d6bc0f5a3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 11:36:32,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bad9430c-d2ef-4a70-8231-523d6bc0f5a3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-16 11:36:32,373 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:36:32,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:36:32,374 INFO L85 PathProgramCache]: Analyzing trace with hash 1246339833, now seen corresponding path program 1 times [2022-11-16 11:36:32,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:36:32,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591254593] [2022-11-16 11:36:32,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:36:32,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:36:32,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 11:36:32,400 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-16 11:36:32,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 11:36:32,422 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-16 11:36:32,423 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-16 11:36:32,423 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-16 11:36:32,423 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-16 11:36:32,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-16 11:36:32,424 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-11-16 11:36:32,424 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-16 11:36:32,425 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-11-16 11:36:32,455 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2022-11-16 11:36:32,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 232 places, 261 transitions, 582 flow [2022-11-16 11:36:32,706 INFO L130 PetriNetUnfolder]: 140/926 cut-off events. [2022-11-16 11:36:32,707 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2022-11-16 11:36:32,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1037 conditions, 926 events. 140/926 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 4264 event pairs, 23 based on Foata normal form. 0/796 useless extension candidates. Maximal degree in co-relation 632. Up to 80 conditions per place. [2022-11-16 11:36:32,725 INFO L82 GeneralOperation]: Start removeDead. Operand has 232 places, 261 transitions, 582 flow [2022-11-16 11:36:32,739 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 232 places, 261 transitions, 582 flow [2022-11-16 11:36:32,740 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 11:36:32,741 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;@5c05baa, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 11:36:32,741 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-16 11:36:32,750 INFO L130 PetriNetUnfolder]: 5/92 cut-off events. [2022-11-16 11:36:32,750 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-16 11:36:32,750 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:36:32,751 INFO L209 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] [2022-11-16 11:36:32,751 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:36:32,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:36:32,754 INFO L85 PathProgramCache]: Analyzing trace with hash 1353933395, now seen corresponding path program 1 times [2022-11-16 11:36:32,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:36:32,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073844609] [2022-11-16 11:36:32,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:36:32,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:36:32,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:36:32,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:32,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:36:32,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073844609] [2022-11-16 11:36:32,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073844609] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:36:32,779 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:36:32,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:36:32,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678984336] [2022-11-16 11:36:32,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:36:32,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-16 11:36:32,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:36:32,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-16 11:36:32,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 11:36:32,782 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 261 [2022-11-16 11:36:32,783 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 261 transitions, 582 flow. Second operand has 2 states, 2 states have (on average 215.5) internal successors, (431), 2 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:32,783 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:36:32,783 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 261 [2022-11-16 11:36:32,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:36:33,041 INFO L130 PetriNetUnfolder]: 54/834 cut-off events. [2022-11-16 11:36:33,041 INFO L131 PetriNetUnfolder]: For 289/307 co-relation queries the response was YES. [2022-11-16 11:36:33,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1031 conditions, 834 events. 54/834 cut-off events. For 289/307 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 3948 event pairs, 23 based on Foata normal form. 574/1364 useless extension candidates. Maximal degree in co-relation 603. Up to 86 conditions per place. [2022-11-16 11:36:33,049 INFO L137 encePairwiseOnDemand]: 226/261 looper letters, 5 selfloop transitions, 0 changer transitions 25/225 dead transitions. [2022-11-16 11:36:33,049 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 225 transitions, 530 flow [2022-11-16 11:36:33,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-16 11:36:33,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-16 11:36:33,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 475 transitions. [2022-11-16 11:36:33,051 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9099616858237548 [2022-11-16 11:36:33,051 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 475 transitions. [2022-11-16 11:36:33,051 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 475 transitions. [2022-11-16 11:36:33,052 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:36:33,052 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 475 transitions. [2022-11-16 11:36:33,053 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 237.5) internal successors, (475), 2 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:33,054 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 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) [2022-11-16 11:36:33,055 INFO L81 ComplementDD]: Finished complementDD. Result 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) [2022-11-16 11:36:33,055 INFO L175 Difference]: Start difference. First operand has 232 places, 261 transitions, 582 flow. Second operand 2 states and 475 transitions. [2022-11-16 11:36:33,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 225 transitions, 530 flow [2022-11-16 11:36:33,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 225 transitions, 530 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-16 11:36:33,060 INFO L231 Difference]: Finished difference. Result has 232 places, 200 transitions, 445 flow [2022-11-16 11:36:33,061 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=261, PETRI_DIFFERENCE_MINUEND_FLOW=510, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=445, PETRI_PLACES=232, PETRI_TRANSITIONS=200} [2022-11-16 11:36:33,061 INFO L288 CegarLoopForPetriNet]: 232 programPoint places, 0 predicate places. [2022-11-16 11:36:33,062 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 200 transitions, 445 flow [2022-11-16 11:36:33,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 215.5) internal successors, (431), 2 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:33,062 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:36:33,062 INFO L209 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] [2022-11-16 11:36:33,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-16 11:36:33,063 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:36:33,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:36:33,063 INFO L85 PathProgramCache]: Analyzing trace with hash 1483016114, now seen corresponding path program 1 times [2022-11-16 11:36:33,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:36:33,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233856079] [2022-11-16 11:36:33,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:36:33,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:36:33,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:36:33,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:33,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:36:33,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233856079] [2022-11-16 11:36:33,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233856079] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:36:33,099 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:36:33,100 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:36:33,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148645307] [2022-11-16 11:36:33,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:36:33,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:36:33,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:36:33,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:36:33,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:36:33,102 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 208 out of 261 [2022-11-16 11:36:33,103 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 200 transitions, 445 flow. Second operand has 3 states, 3 states have (on average 209.0) internal successors, (627), 3 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:33,103 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:36:33,103 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 208 of 261 [2022-11-16 11:36:33,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:36:33,182 INFO L130 PetriNetUnfolder]: 0/288 cut-off events. [2022-11-16 11:36:33,182 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-11-16 11:36:33,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 355 conditions, 288 events. 0/288 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 769 event pairs, 0 based on Foata normal form. 0/283 useless extension candidates. Maximal degree in co-relation 0. Up to 30 conditions per place. [2022-11-16 11:36:33,184 INFO L137 encePairwiseOnDemand]: 258/261 looper letters, 14 selfloop transitions, 2 changer transitions 0/204 dead transitions. [2022-11-16 11:36:33,184 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 204 transitions, 485 flow [2022-11-16 11:36:33,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:36:33,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-16 11:36:33,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 641 transitions. [2022-11-16 11:36:33,186 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8186462324393359 [2022-11-16 11:36:33,187 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 641 transitions. [2022-11-16 11:36:33,187 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 641 transitions. [2022-11-16 11:36:33,187 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:36:33,187 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 641 transitions. [2022-11-16 11:36:33,189 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 213.66666666666666) internal successors, (641), 3 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:33,200 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 261.0) internal successors, (1044), 4 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:33,208 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 261.0) internal successors, (1044), 4 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:33,208 INFO L175 Difference]: Start difference. First operand has 232 places, 200 transitions, 445 flow. Second operand 3 states and 641 transitions. [2022-11-16 11:36:33,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 204 transitions, 485 flow [2022-11-16 11:36:33,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 204 transitions, 465 flow, removed 10 selfloop flow, removed 0 redundant places. [2022-11-16 11:36:33,214 INFO L231 Difference]: Finished difference. Result has 215 places, 201 transitions, 437 flow [2022-11-16 11:36:33,214 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=261, PETRI_DIFFERENCE_MINUEND_FLOW=425, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=437, PETRI_PLACES=215, PETRI_TRANSITIONS=201} [2022-11-16 11:36:33,215 INFO L288 CegarLoopForPetriNet]: 232 programPoint places, -17 predicate places. [2022-11-16 11:36:33,215 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 201 transitions, 437 flow [2022-11-16 11:36:33,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 209.0) internal successors, (627), 3 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:33,216 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:36:33,216 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:36:33,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-16 11:36:33,217 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:36:33,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:36:33,217 INFO L85 PathProgramCache]: Analyzing trace with hash -179549886, now seen corresponding path program 1 times [2022-11-16 11:36:33,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:36:33,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520750608] [2022-11-16 11:36:33,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:36:33,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:36:33,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:36:33,285 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:33,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:36:33,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520750608] [2022-11-16 11:36:33,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520750608] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:36:33,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868142265] [2022-11-16 11:36:33,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:36:33,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:36:33,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bad9430c-d2ef-4a70-8231-523d6bc0f5a3/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:36:33,288 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bad9430c-d2ef-4a70-8231-523d6bc0f5a3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:36:33,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bad9430c-d2ef-4a70-8231-523d6bc0f5a3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 11:36:33,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:36:33,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 11:36:33,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:36:33,443 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:33,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:36:33,483 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:33,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868142265] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:36:33,484 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:36:33,484 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-16 11:36:33,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324017118] [2022-11-16 11:36:33,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:36:33,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 11:36:33,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:36:33,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 11:36:33,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:36:33,490 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 261 [2022-11-16 11:36:33,493 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 201 transitions, 437 flow. Second operand has 10 states, 10 states have (on average 209.3) internal successors, (2093), 10 states have internal predecessors, (2093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:33,493 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:36:33,493 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 261 [2022-11-16 11:36:33,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:36:33,632 INFO L130 PetriNetUnfolder]: 0/264 cut-off events. [2022-11-16 11:36:33,632 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-16 11:36:33,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 336 conditions, 264 events. 0/264 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 625 event pairs, 0 based on Foata normal form. 2/266 useless extension candidates. Maximal degree in co-relation 0. Up to 15 conditions per place. [2022-11-16 11:36:33,633 INFO L137 encePairwiseOnDemand]: 255/261 looper letters, 15 selfloop transitions, 9 changer transitions 0/211 dead transitions. [2022-11-16 11:36:33,633 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 211 transitions, 507 flow [2022-11-16 11:36:33,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 11:36:33,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-16 11:36:33,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1889 transitions. [2022-11-16 11:36:33,638 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8041719880800341 [2022-11-16 11:36:33,638 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1889 transitions. [2022-11-16 11:36:33,638 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1889 transitions. [2022-11-16 11:36:33,640 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:36:33,640 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1889 transitions. [2022-11-16 11:36:33,643 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 209.88888888888889) internal successors, (1889), 9 states have internal predecessors, (1889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:33,648 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 261.0) internal successors, (2610), 10 states have internal predecessors, (2610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:33,649 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 261.0) internal successors, (2610), 10 states have internal predecessors, (2610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:33,649 INFO L175 Difference]: Start difference. First operand has 215 places, 201 transitions, 437 flow. Second operand 9 states and 1889 transitions. [2022-11-16 11:36:33,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 211 transitions, 507 flow [2022-11-16 11:36:33,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 211 transitions, 505 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-16 11:36:33,654 INFO L231 Difference]: Finished difference. Result has 225 places, 207 transitions, 485 flow [2022-11-16 11:36:33,655 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=261, PETRI_DIFFERENCE_MINUEND_FLOW=435, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=485, PETRI_PLACES=225, PETRI_TRANSITIONS=207} [2022-11-16 11:36:33,656 INFO L288 CegarLoopForPetriNet]: 232 programPoint places, -7 predicate places. [2022-11-16 11:36:33,656 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 207 transitions, 485 flow [2022-11-16 11:36:33,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 209.3) internal successors, (2093), 10 states have internal predecessors, (2093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:33,657 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:36:33,657 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 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] [2022-11-16 11:36:33,663 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bad9430c-d2ef-4a70-8231-523d6bc0f5a3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-16 11:36:33,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bad9430c-d2ef-4a70-8231-523d6bc0f5a3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:36:33,863 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:36:33,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:36:33,863 INFO L85 PathProgramCache]: Analyzing trace with hash 959871999, now seen corresponding path program 1 times [2022-11-16 11:36:33,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:36:33,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706702056] [2022-11-16 11:36:33,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:36:33,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:36:33,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:36:34,009 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:34,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:36:34,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706702056] [2022-11-16 11:36:34,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706702056] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:36:34,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250812128] [2022-11-16 11:36:34,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:36:34,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:36:34,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bad9430c-d2ef-4a70-8231-523d6bc0f5a3/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:36:34,011 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bad9430c-d2ef-4a70-8231-523d6bc0f5a3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:36:34,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bad9430c-d2ef-4a70-8231-523d6bc0f5a3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 11:36:34,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:36:34,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 11:36:34,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:36:34,223 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:34,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:36:34,361 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:34,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250812128] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:36:34,361 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:36:34,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-16 11:36:34,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137892800] [2022-11-16 11:36:34,362 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:36:34,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-16 11:36:34,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:36:34,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-16 11:36:34,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-16 11:36:34,367 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 261 [2022-11-16 11:36:34,371 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 207 transitions, 485 flow. Second operand has 18 states, 18 states have (on average 209.61111111111111) internal successors, (3773), 18 states have internal predecessors, (3773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:34,371 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:36:34,371 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 261 [2022-11-16 11:36:34,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:36:34,604 INFO L130 PetriNetUnfolder]: 0/228 cut-off events. [2022-11-16 11:36:34,605 INFO L131 PetriNetUnfolder]: For 24/24 co-relation queries the response was YES. [2022-11-16 11:36:34,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 325 conditions, 228 events. 0/228 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 405 event pairs, 0 based on Foata normal form. 3/231 useless extension candidates. Maximal degree in co-relation 0. Up to 7 conditions per place. [2022-11-16 11:36:34,606 INFO L137 encePairwiseOnDemand]: 256/261 looper letters, 18 selfloop transitions, 16 changer transitions 0/210 dead transitions. [2022-11-16 11:36:34,606 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 210 transitions, 585 flow [2022-11-16 11:36:34,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-16 11:36:34,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-16 11:36:34,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3763 transitions. [2022-11-16 11:36:34,614 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8009791400595998 [2022-11-16 11:36:34,615 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3763 transitions. [2022-11-16 11:36:34,615 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3763 transitions. [2022-11-16 11:36:34,617 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:36:34,617 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3763 transitions. [2022-11-16 11:36:34,625 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 209.05555555555554) internal successors, (3763), 18 states have internal predecessors, (3763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:34,633 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 261.0) internal successors, (4959), 19 states have internal predecessors, (4959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:34,635 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 261.0) internal successors, (4959), 19 states have internal predecessors, (4959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:34,635 INFO L175 Difference]: Start difference. First operand has 225 places, 207 transitions, 485 flow. Second operand 18 states and 3763 transitions. [2022-11-16 11:36:34,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 210 transitions, 585 flow [2022-11-16 11:36:34,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 210 transitions, 564 flow, removed 4 selfloop flow, removed 4 redundant places. [2022-11-16 11:36:34,640 INFO L231 Difference]: Finished difference. Result has 226 places, 201 transitions, 500 flow [2022-11-16 11:36:34,641 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=261, PETRI_DIFFERENCE_MINUEND_FLOW=442, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=500, PETRI_PLACES=226, PETRI_TRANSITIONS=201} [2022-11-16 11:36:34,641 INFO L288 CegarLoopForPetriNet]: 232 programPoint places, -6 predicate places. [2022-11-16 11:36:34,641 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 201 transitions, 500 flow [2022-11-16 11:36:34,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 209.61111111111111) internal successors, (3773), 18 states have internal predecessors, (3773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:34,643 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:36:34,643 INFO L209 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:36:34,653 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bad9430c-d2ef-4a70-8231-523d6bc0f5a3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-16 11:36:34,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bad9430c-d2ef-4a70-8231-523d6bc0f5a3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:36:34,849 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:36:34,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:36:34,849 INFO L85 PathProgramCache]: Analyzing trace with hash 627152503, now seen corresponding path program 1 times [2022-11-16 11:36:34,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:36:34,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303078714] [2022-11-16 11:36:34,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:36:34,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:36:34,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 11:36:34,870 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-16 11:36:34,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 11:36:34,892 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-16 11:36:34,893 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-16 11:36:34,893 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-16 11:36:34,893 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-16 11:36:34,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-16 11:36:34,894 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-11-16 11:36:34,894 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-16 11:36:34,894 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2022-11-16 11:36:34,937 INFO L144 ThreadInstanceAdder]: Constructed 6 joinOtherThreadTransitions. [2022-11-16 11:36:34,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 262 places, 296 transitions, 670 flow [2022-11-16 11:36:35,327 INFO L130 PetriNetUnfolder]: 263/1553 cut-off events. [2022-11-16 11:36:35,327 INFO L131 PetriNetUnfolder]: For 242/242 co-relation queries the response was YES. [2022-11-16 11:36:35,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1785 conditions, 1553 events. 263/1553 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 8828 event pairs, 72 based on Foata normal form. 0/1347 useless extension candidates. Maximal degree in co-relation 1025. Up to 192 conditions per place. [2022-11-16 11:36:35,346 INFO L82 GeneralOperation]: Start removeDead. Operand has 262 places, 296 transitions, 670 flow [2022-11-16 11:36:35,362 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 262 places, 296 transitions, 670 flow [2022-11-16 11:36:35,364 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 11:36:35,364 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;@5c05baa, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 11:36:35,364 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-16 11:36:35,372 INFO L130 PetriNetUnfolder]: 5/92 cut-off events. [2022-11-16 11:36:35,372 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-16 11:36:35,372 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:36:35,373 INFO L209 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] [2022-11-16 11:36:35,373 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:36:35,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:36:35,373 INFO L85 PathProgramCache]: Analyzing trace with hash -636485805, now seen corresponding path program 1 times [2022-11-16 11:36:35,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:36:35,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234943105] [2022-11-16 11:36:35,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:36:35,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:36:35,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:36:35,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:35,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:36:35,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234943105] [2022-11-16 11:36:35,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234943105] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:36:35,393 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:36:35,393 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:36:35,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094522698] [2022-11-16 11:36:35,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:36:35,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-16 11:36:35,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:36:35,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-16 11:36:35,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 11:36:35,395 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 242 out of 296 [2022-11-16 11:36:35,396 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 296 transitions, 670 flow. Second operand has 2 states, 2 states have (on average 242.5) internal successors, (485), 2 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:35,396 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:36:35,396 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 242 of 296 [2022-11-16 11:36:35,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:36:35,824 INFO L130 PetriNetUnfolder]: 135/1418 cut-off events. [2022-11-16 11:36:35,824 INFO L131 PetriNetUnfolder]: For 659/697 co-relation queries the response was YES. [2022-11-16 11:36:35,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1849 conditions, 1418 events. 135/1418 cut-off events. For 659/697 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 8373 event pairs, 72 based on Foata normal form. 1306/2646 useless extension candidates. Maximal degree in co-relation 1018. Up to 199 conditions per place. [2022-11-16 11:36:35,841 INFO L137 encePairwiseOnDemand]: 255/296 looper letters, 6 selfloop transitions, 0 changer transitions 26/254 dead transitions. [2022-11-16 11:36:35,841 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 254 transitions, 610 flow [2022-11-16 11:36:35,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-16 11:36:35,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-16 11:36:35,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 537 transitions. [2022-11-16 11:36:35,843 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9070945945945946 [2022-11-16 11:36:35,843 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 537 transitions. [2022-11-16 11:36:35,844 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 537 transitions. [2022-11-16 11:36:35,844 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:36:35,844 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 537 transitions. [2022-11-16 11:36:35,846 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 268.5) internal successors, (537), 2 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:35,847 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 296.0) internal successors, (888), 3 states have internal predecessors, (888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:35,848 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 296.0) internal successors, (888), 3 states have internal predecessors, (888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:35,848 INFO L175 Difference]: Start difference. First operand has 262 places, 296 transitions, 670 flow. Second operand 2 states and 537 transitions. [2022-11-16 11:36:35,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 254 transitions, 610 flow [2022-11-16 11:36:35,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 254 transitions, 610 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-16 11:36:35,853 INFO L231 Difference]: Finished difference. Result has 262 places, 228 transitions, 516 flow [2022-11-16 11:36:35,853 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=296, PETRI_DIFFERENCE_MINUEND_FLOW=586, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=516, PETRI_PLACES=262, PETRI_TRANSITIONS=228} [2022-11-16 11:36:35,854 INFO L288 CegarLoopForPetriNet]: 262 programPoint places, 0 predicate places. [2022-11-16 11:36:35,854 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 228 transitions, 516 flow [2022-11-16 11:36:35,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 242.5) internal successors, (485), 2 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:35,855 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:36:35,855 INFO L209 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] [2022-11-16 11:36:35,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-16 11:36:35,855 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:36:35,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:36:35,856 INFO L85 PathProgramCache]: Analyzing trace with hash -507403086, now seen corresponding path program 1 times [2022-11-16 11:36:35,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:36:35,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502215217] [2022-11-16 11:36:35,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:36:35,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:36:35,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:36:35,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:35,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:36:35,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502215217] [2022-11-16 11:36:35,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502215217] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:36:35,897 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:36:35,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:36:35,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432612131] [2022-11-16 11:36:35,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:36:35,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:36:35,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:36:35,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:36:35,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:36:35,902 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 235 out of 296 [2022-11-16 11:36:35,903 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 228 transitions, 516 flow. Second operand has 3 states, 3 states have (on average 236.0) internal successors, (708), 3 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:35,903 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:36:35,903 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 235 of 296 [2022-11-16 11:36:35,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:36:35,999 INFO L130 PetriNetUnfolder]: 0/337 cut-off events. [2022-11-16 11:36:36,000 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2022-11-16 11:36:36,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 419 conditions, 337 events. 0/337 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 954 event pairs, 0 based on Foata normal form. 0/331 useless extension candidates. Maximal degree in co-relation 0. Up to 36 conditions per place. [2022-11-16 11:36:36,001 INFO L137 encePairwiseOnDemand]: 293/296 looper letters, 15 selfloop transitions, 2 changer transitions 0/232 dead transitions. [2022-11-16 11:36:36,001 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 232 transitions, 558 flow [2022-11-16 11:36:36,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:36:36,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-16 11:36:36,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 723 transitions. [2022-11-16 11:36:36,004 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8141891891891891 [2022-11-16 11:36:36,004 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 723 transitions. [2022-11-16 11:36:36,004 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 723 transitions. [2022-11-16 11:36:36,005 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:36:36,005 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 723 transitions. [2022-11-16 11:36:36,007 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 241.0) internal successors, (723), 3 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:36,008 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 296.0) internal successors, (1184), 4 states have internal predecessors, (1184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:36,009 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 296.0) internal successors, (1184), 4 states have internal predecessors, (1184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:36,009 INFO L175 Difference]: Start difference. First operand has 262 places, 228 transitions, 516 flow. Second operand 3 states and 723 transitions. [2022-11-16 11:36:36,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 232 transitions, 558 flow [2022-11-16 11:36:36,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 232 transitions, 528 flow, removed 15 selfloop flow, removed 0 redundant places. [2022-11-16 11:36:36,014 INFO L231 Difference]: Finished difference. Result has 245 places, 229 transitions, 498 flow [2022-11-16 11:36:36,015 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=296, PETRI_DIFFERENCE_MINUEND_FLOW=486, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=498, PETRI_PLACES=245, PETRI_TRANSITIONS=229} [2022-11-16 11:36:36,016 INFO L288 CegarLoopForPetriNet]: 262 programPoint places, -17 predicate places. [2022-11-16 11:36:36,016 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 229 transitions, 498 flow [2022-11-16 11:36:36,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 236.0) internal successors, (708), 3 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:36,016 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:36:36,017 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:36:36,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-11-16 11:36:36,017 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:36:36,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:36:36,018 INFO L85 PathProgramCache]: Analyzing trace with hash 1218643265, now seen corresponding path program 1 times [2022-11-16 11:36:36,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:36:36,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178001097] [2022-11-16 11:36:36,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:36:36,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:36:36,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:36:36,109 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:36,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:36:36,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178001097] [2022-11-16 11:36:36,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178001097] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:36:36,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605675] [2022-11-16 11:36:36,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:36:36,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:36:36,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bad9430c-d2ef-4a70-8231-523d6bc0f5a3/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:36:36,112 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bad9430c-d2ef-4a70-8231-523d6bc0f5a3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:36:36,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bad9430c-d2ef-4a70-8231-523d6bc0f5a3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-16 11:36:36,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:36:36,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 11:36:36,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:36:36,278 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:36,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:36:36,323 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:36,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605675] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:36:36,324 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:36:36,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-16 11:36:36,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046833670] [2022-11-16 11:36:36,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:36:36,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 11:36:36,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:36:36,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 11:36:36,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:36:36,329 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 234 out of 296 [2022-11-16 11:36:36,331 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 229 transitions, 498 flow. Second operand has 10 states, 10 states have (on average 236.3) internal successors, (2363), 10 states have internal predecessors, (2363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:36,331 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:36:36,332 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 234 of 296 [2022-11-16 11:36:36,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:36:36,497 INFO L130 PetriNetUnfolder]: 0/313 cut-off events. [2022-11-16 11:36:36,498 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-11-16 11:36:36,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 398 conditions, 313 events. 0/313 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 809 event pairs, 0 based on Foata normal form. 2/315 useless extension candidates. Maximal degree in co-relation 0. Up to 19 conditions per place. [2022-11-16 11:36:36,499 INFO L137 encePairwiseOnDemand]: 290/296 looper letters, 16 selfloop transitions, 9 changer transitions 0/239 dead transitions. [2022-11-16 11:36:36,499 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 239 transitions, 570 flow [2022-11-16 11:36:36,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 11:36:36,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-16 11:36:36,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2133 transitions. [2022-11-16 11:36:36,506 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8006756756756757 [2022-11-16 11:36:36,506 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2133 transitions. [2022-11-16 11:36:36,506 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2133 transitions. [2022-11-16 11:36:36,508 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:36:36,508 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2133 transitions. [2022-11-16 11:36:36,512 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 237.0) internal successors, (2133), 9 states have internal predecessors, (2133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:36,517 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 296.0) internal successors, (2960), 10 states have internal predecessors, (2960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:36,518 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 296.0) internal successors, (2960), 10 states have internal predecessors, (2960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:36,518 INFO L175 Difference]: Start difference. First operand has 245 places, 229 transitions, 498 flow. Second operand 9 states and 2133 transitions. [2022-11-16 11:36:36,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 239 transitions, 570 flow [2022-11-16 11:36:36,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 239 transitions, 568 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-16 11:36:36,523 INFO L231 Difference]: Finished difference. Result has 255 places, 235 transitions, 546 flow [2022-11-16 11:36:36,523 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=296, PETRI_DIFFERENCE_MINUEND_FLOW=496, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=546, PETRI_PLACES=255, PETRI_TRANSITIONS=235} [2022-11-16 11:36:36,523 INFO L288 CegarLoopForPetriNet]: 262 programPoint places, -7 predicate places. [2022-11-16 11:36:36,524 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 235 transitions, 546 flow [2022-11-16 11:36:36,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 236.3) internal successors, (2363), 10 states have internal predecessors, (2363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:36,525 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:36:36,525 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 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] [2022-11-16 11:36:36,539 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bad9430c-d2ef-4a70-8231-523d6bc0f5a3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-16 11:36:36,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bad9430c-d2ef-4a70-8231-523d6bc0f5a3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-16 11:36:36,731 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:36:36,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:36:36,732 INFO L85 PathProgramCache]: Analyzing trace with hash 1155763644, now seen corresponding path program 1 times [2022-11-16 11:36:36,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:36:36,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811062122] [2022-11-16 11:36:36,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:36:36,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:36:36,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:36:36,869 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:36,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:36:36,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811062122] [2022-11-16 11:36:36,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811062122] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:36:36,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128242425] [2022-11-16 11:36:36,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:36:36,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:36:36,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bad9430c-d2ef-4a70-8231-523d6bc0f5a3/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:36:36,871 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bad9430c-d2ef-4a70-8231-523d6bc0f5a3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:36:36,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bad9430c-d2ef-4a70-8231-523d6bc0f5a3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-16 11:36:37,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:36:37,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 11:36:37,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:36:37,090 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:37,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:36:37,219 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:37,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128242425] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:36:37,219 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:36:37,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-16 11:36:37,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657764221] [2022-11-16 11:36:37,220 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:36:37,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-16 11:36:37,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:36:37,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-16 11:36:37,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-16 11:36:37,229 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 234 out of 296 [2022-11-16 11:36:37,233 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 235 transitions, 546 flow. Second operand has 18 states, 18 states have (on average 236.61111111111111) internal successors, (4259), 18 states have internal predecessors, (4259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:37,234 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:36:37,234 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 234 of 296 [2022-11-16 11:36:37,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:36:37,512 INFO L130 PetriNetUnfolder]: 0/265 cut-off events. [2022-11-16 11:36:37,512 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-11-16 11:36:37,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 379 conditions, 265 events. 0/265 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 509 event pairs, 0 based on Foata normal form. 4/269 useless extension candidates. Maximal degree in co-relation 0. Up to 9 conditions per place. [2022-11-16 11:36:37,513 INFO L137 encePairwiseOnDemand]: 291/296 looper letters, 21 selfloop transitions, 19 changer transitions 0/243 dead transitions. [2022-11-16 11:36:37,513 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 243 transitions, 682 flow [2022-11-16 11:36:37,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-16 11:36:37,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-16 11:36:37,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 4958 transitions. [2022-11-16 11:36:37,520 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7976190476190477 [2022-11-16 11:36:37,521 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 4958 transitions. [2022-11-16 11:36:37,521 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 4958 transitions. [2022-11-16 11:36:37,523 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:36:37,523 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 4958 transitions. [2022-11-16 11:36:37,531 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 236.0952380952381) internal successors, (4958), 21 states have internal predecessors, (4958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:37,541 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 296.0) internal successors, (6512), 22 states have internal predecessors, (6512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:37,544 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 296.0) internal successors, (6512), 22 states have internal predecessors, (6512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:37,544 INFO L175 Difference]: Start difference. First operand has 255 places, 235 transitions, 546 flow. Second operand 21 states and 4958 transitions. [2022-11-16 11:36:37,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 243 transitions, 682 flow [2022-11-16 11:36:37,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 243 transitions, 657 flow, removed 5 selfloop flow, removed 4 redundant places. [2022-11-16 11:36:37,550 INFO L231 Difference]: Finished difference. Result has 259 places, 232 transitions, 580 flow [2022-11-16 11:36:37,550 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=296, PETRI_DIFFERENCE_MINUEND_FLOW=503, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=580, PETRI_PLACES=259, PETRI_TRANSITIONS=232} [2022-11-16 11:36:37,551 INFO L288 CegarLoopForPetriNet]: 262 programPoint places, -3 predicate places. [2022-11-16 11:36:37,551 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 232 transitions, 580 flow [2022-11-16 11:36:37,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 236.61111111111111) internal successors, (4259), 18 states have internal predecessors, (4259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:37,553 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:36:37,553 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:36:37,564 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bad9430c-d2ef-4a70-8231-523d6bc0f5a3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-16 11:36:37,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bad9430c-d2ef-4a70-8231-523d6bc0f5a3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:36:37,759 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:36:37,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:36:37,760 INFO L85 PathProgramCache]: Analyzing trace with hash 397248763, now seen corresponding path program 1 times [2022-11-16 11:36:37,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:36:37,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937562784] [2022-11-16 11:36:37,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:36:37,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:36:37,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 11:36:37,787 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-16 11:36:37,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 11:36:37,816 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-16 11:36:37,816 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-16 11:36:37,816 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-16 11:36:37,817 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-16 11:36:37,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-11-16 11:36:37,817 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-11-16 11:36:37,818 WARN L233 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-16 11:36:37,818 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2022-11-16 11:36:37,859 INFO L144 ThreadInstanceAdder]: Constructed 7 joinOtherThreadTransitions. [2022-11-16 11:36:37,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 292 places, 331 transitions, 760 flow [2022-11-16 11:36:38,719 INFO L130 PetriNetUnfolder]: 530/2772 cut-off events. [2022-11-16 11:36:38,719 INFO L131 PetriNetUnfolder]: For 525/525 co-relation queries the response was YES. [2022-11-16 11:36:38,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3270 conditions, 2772 events. 530/2772 cut-off events. For 525/525 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 18691 event pairs, 201 based on Foata normal form. 0/2426 useless extension candidates. Maximal degree in co-relation 1771. Up to 448 conditions per place. [2022-11-16 11:36:38,876 INFO L82 GeneralOperation]: Start removeDead. Operand has 292 places, 331 transitions, 760 flow [2022-11-16 11:36:38,905 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 292 places, 331 transitions, 760 flow [2022-11-16 11:36:38,906 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 11:36:38,907 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;@5c05baa, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 11:36:38,907 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-16 11:36:38,914 INFO L130 PetriNetUnfolder]: 5/92 cut-off events. [2022-11-16 11:36:38,914 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-16 11:36:38,915 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:36:38,915 INFO L209 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] [2022-11-16 11:36:38,915 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:36:38,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:36:38,916 INFO L85 PathProgramCache]: Analyzing trace with hash 126806451, now seen corresponding path program 1 times [2022-11-16 11:36:38,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:36:38,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706917149] [2022-11-16 11:36:38,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:36:38,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:36:38,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:36:38,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:38,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:36:38,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706917149] [2022-11-16 11:36:38,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706917149] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:36:38,937 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:36:38,937 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:36:38,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449329151] [2022-11-16 11:36:38,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:36:38,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-16 11:36:38,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:36:38,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-16 11:36:38,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 11:36:38,941 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 269 out of 331 [2022-11-16 11:36:38,942 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 331 transitions, 760 flow. Second operand has 2 states, 2 states have (on average 269.5) internal successors, (539), 2 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:38,942 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:36:38,942 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 269 of 331 [2022-11-16 11:36:38,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:36:39,856 INFO L130 PetriNetUnfolder]: 328/2562 cut-off events. [2022-11-16 11:36:39,857 INFO L131 PetriNetUnfolder]: For 1463/1509 co-relation queries the response was YES. [2022-11-16 11:36:39,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3516 conditions, 2562 events. 328/2562 cut-off events. For 1463/1509 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 18358 event pairs, 201 based on Foata normal form. 2940/5358 useless extension candidates. Maximal degree in co-relation 1834. Up to 456 conditions per place. [2022-11-16 11:36:39,883 INFO L137 encePairwiseOnDemand]: 284/331 looper letters, 7 selfloop transitions, 0 changer transitions 27/283 dead transitions. [2022-11-16 11:36:39,883 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 283 transitions, 692 flow [2022-11-16 11:36:39,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-16 11:36:39,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-16 11:36:39,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 599 transitions. [2022-11-16 11:36:39,885 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.904833836858006 [2022-11-16 11:36:39,886 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 599 transitions. [2022-11-16 11:36:39,886 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 599 transitions. [2022-11-16 11:36:39,886 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:36:39,886 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 599 transitions. [2022-11-16 11:36:39,888 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 299.5) internal successors, (599), 2 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:39,889 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 331.0) internal successors, (993), 3 states have internal predecessors, (993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:39,890 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 331.0) internal successors, (993), 3 states have internal predecessors, (993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:39,890 INFO L175 Difference]: Start difference. First operand has 292 places, 331 transitions, 760 flow. Second operand 2 states and 599 transitions. [2022-11-16 11:36:39,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 283 transitions, 692 flow [2022-11-16 11:36:39,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 283 transitions, 692 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-16 11:36:39,896 INFO L231 Difference]: Finished difference. Result has 292 places, 256 transitions, 589 flow [2022-11-16 11:36:39,897 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=331, PETRI_DIFFERENCE_MINUEND_FLOW=664, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=589, PETRI_PLACES=292, PETRI_TRANSITIONS=256} [2022-11-16 11:36:39,897 INFO L288 CegarLoopForPetriNet]: 292 programPoint places, 0 predicate places. [2022-11-16 11:36:39,898 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 256 transitions, 589 flow [2022-11-16 11:36:39,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 269.5) internal successors, (539), 2 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:39,898 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:36:39,898 INFO L209 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] [2022-11-16 11:36:39,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-11-16 11:36:39,899 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:36:39,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:36:39,899 INFO L85 PathProgramCache]: Analyzing trace with hash 255889170, now seen corresponding path program 1 times [2022-11-16 11:36:39,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:36:39,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043344652] [2022-11-16 11:36:39,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:36:39,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:36:39,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:36:39,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:39,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:36:39,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043344652] [2022-11-16 11:36:39,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043344652] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:36:39,932 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:36:39,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:36:39,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203454171] [2022-11-16 11:36:39,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:36:39,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:36:39,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:36:39,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:36:39,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:36:39,935 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 262 out of 331 [2022-11-16 11:36:39,936 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 256 transitions, 589 flow. Second operand has 3 states, 3 states have (on average 263.0) internal successors, (789), 3 states have internal predecessors, (789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:39,936 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:36:39,936 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 262 of 331 [2022-11-16 11:36:39,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:36:40,049 INFO L130 PetriNetUnfolder]: 0/386 cut-off events. [2022-11-16 11:36:40,049 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2022-11-16 11:36:40,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 484 conditions, 386 events. 0/386 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1139 event pairs, 0 based on Foata normal form. 0/379 useless extension candidates. Maximal degree in co-relation 0. Up to 42 conditions per place. [2022-11-16 11:36:40,051 INFO L137 encePairwiseOnDemand]: 328/331 looper letters, 16 selfloop transitions, 2 changer transitions 0/260 dead transitions. [2022-11-16 11:36:40,051 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 260 transitions, 633 flow [2022-11-16 11:36:40,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:36:40,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-16 11:36:40,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 805 transitions. [2022-11-16 11:36:40,054 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.81067472306143 [2022-11-16 11:36:40,054 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 805 transitions. [2022-11-16 11:36:40,054 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 805 transitions. [2022-11-16 11:36:40,054 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:36:40,055 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 805 transitions. [2022-11-16 11:36:40,056 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 268.3333333333333) internal successors, (805), 3 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:40,060 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 331.0) internal successors, (1324), 4 states have internal predecessors, (1324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:40,060 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 331.0) internal successors, (1324), 4 states have internal predecessors, (1324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:40,061 INFO L175 Difference]: Start difference. First operand has 292 places, 256 transitions, 589 flow. Second operand 3 states and 805 transitions. [2022-11-16 11:36:40,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 260 transitions, 633 flow [2022-11-16 11:36:40,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 260 transitions, 591 flow, removed 21 selfloop flow, removed 0 redundant places. [2022-11-16 11:36:40,066 INFO L231 Difference]: Finished difference. Result has 275 places, 257 transitions, 559 flow [2022-11-16 11:36:40,068 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=331, PETRI_DIFFERENCE_MINUEND_FLOW=547, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=559, PETRI_PLACES=275, PETRI_TRANSITIONS=257} [2022-11-16 11:36:40,069 INFO L288 CegarLoopForPetriNet]: 292 programPoint places, -17 predicate places. [2022-11-16 11:36:40,069 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 257 transitions, 559 flow [2022-11-16 11:36:40,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 263.0) internal successors, (789), 3 states have internal predecessors, (789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:40,070 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:36:40,070 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:36:40,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-11-16 11:36:40,070 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:36:40,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:36:40,071 INFO L85 PathProgramCache]: Analyzing trace with hash -175965056, now seen corresponding path program 1 times [2022-11-16 11:36:40,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:36:40,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147334173] [2022-11-16 11:36:40,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:36:40,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:36:40,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:36:40,130 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:40,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:36:40,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147334173] [2022-11-16 11:36:40,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147334173] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:36:40,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074496120] [2022-11-16 11:36:40,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:36:40,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:36:40,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bad9430c-d2ef-4a70-8231-523d6bc0f5a3/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:36:40,133 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bad9430c-d2ef-4a70-8231-523d6bc0f5a3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:36:40,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bad9430c-d2ef-4a70-8231-523d6bc0f5a3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-16 11:36:40,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:36:40,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 11:36:40,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:36:40,318 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:40,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:36:40,358 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:40,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074496120] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:36:40,358 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:36:40,358 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-16 11:36:40,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940152634] [2022-11-16 11:36:40,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:36:40,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 11:36:40,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:36:40,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 11:36:40,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:36:40,362 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 261 out of 331 [2022-11-16 11:36:40,365 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 257 transitions, 559 flow. Second operand has 10 states, 10 states have (on average 263.3) internal successors, (2633), 10 states have internal predecessors, (2633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:40,365 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:36:40,365 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 261 of 331 [2022-11-16 11:36:40,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:36:40,586 INFO L130 PetriNetUnfolder]: 0/362 cut-off events. [2022-11-16 11:36:40,586 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2022-11-16 11:36:40,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 460 conditions, 362 events. 0/362 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 996 event pairs, 0 based on Foata normal form. 2/364 useless extension candidates. Maximal degree in co-relation 0. Up to 23 conditions per place. [2022-11-16 11:36:40,587 INFO L137 encePairwiseOnDemand]: 325/331 looper letters, 17 selfloop transitions, 9 changer transitions 0/267 dead transitions. [2022-11-16 11:36:40,588 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 267 transitions, 633 flow [2022-11-16 11:36:40,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 11:36:40,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-16 11:36:40,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2377 transitions. [2022-11-16 11:36:40,595 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7979187646861363 [2022-11-16 11:36:40,595 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2377 transitions. [2022-11-16 11:36:40,595 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2377 transitions. [2022-11-16 11:36:40,597 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:36:40,597 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2377 transitions. [2022-11-16 11:36:40,602 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 264.1111111111111) internal successors, (2377), 9 states have internal predecessors, (2377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:40,608 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 331.0) internal successors, (3310), 10 states have internal predecessors, (3310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:40,609 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 331.0) internal successors, (3310), 10 states have internal predecessors, (3310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:40,610 INFO L175 Difference]: Start difference. First operand has 275 places, 257 transitions, 559 flow. Second operand 9 states and 2377 transitions. [2022-11-16 11:36:40,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 267 transitions, 633 flow [2022-11-16 11:36:40,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 267 transitions, 631 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-16 11:36:40,617 INFO L231 Difference]: Finished difference. Result has 285 places, 263 transitions, 607 flow [2022-11-16 11:36:40,617 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=331, PETRI_DIFFERENCE_MINUEND_FLOW=557, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=607, PETRI_PLACES=285, PETRI_TRANSITIONS=263} [2022-11-16 11:36:40,618 INFO L288 CegarLoopForPetriNet]: 292 programPoint places, -7 predicate places. [2022-11-16 11:36:40,618 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 263 transitions, 607 flow [2022-11-16 11:36:40,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 263.3) internal successors, (2633), 10 states have internal predecessors, (2633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:40,619 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:36:40,619 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 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] [2022-11-16 11:36:40,630 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bad9430c-d2ef-4a70-8231-523d6bc0f5a3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-16 11:36:40,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bad9430c-d2ef-4a70-8231-523d6bc0f5a3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-16 11:36:40,825 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:36:40,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:36:40,825 INFO L85 PathProgramCache]: Analyzing trace with hash 18755193, now seen corresponding path program 1 times [2022-11-16 11:36:40,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:36:40,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302334567] [2022-11-16 11:36:40,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:36:40,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:36:40,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:36:40,980 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:40,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:36:40,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302334567] [2022-11-16 11:36:40,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302334567] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:36:40,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194897402] [2022-11-16 11:36:40,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:36:40,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:36:40,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bad9430c-d2ef-4a70-8231-523d6bc0f5a3/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:36:40,983 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bad9430c-d2ef-4a70-8231-523d6bc0f5a3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:36:41,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bad9430c-d2ef-4a70-8231-523d6bc0f5a3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-16 11:36:41,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:36:41,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 11:36:41,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:36:41,228 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:41,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:36:41,362 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:41,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194897402] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:36:41,363 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:36:41,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-16 11:36:41,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047776229] [2022-11-16 11:36:41,363 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:36:41,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-16 11:36:41,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:36:41,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-16 11:36:41,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-16 11:36:41,374 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 261 out of 331 [2022-11-16 11:36:41,381 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 263 transitions, 607 flow. Second operand has 18 states, 18 states have (on average 263.6111111111111) internal successors, (4745), 18 states have internal predecessors, (4745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:41,382 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:36:41,382 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 261 of 331 [2022-11-16 11:36:41,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:36:41,709 INFO L130 PetriNetUnfolder]: 0/314 cut-off events. [2022-11-16 11:36:41,709 INFO L131 PetriNetUnfolder]: For 36/36 co-relation queries the response was YES. [2022-11-16 11:36:41,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 449 conditions, 314 events. 0/314 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 670 event pairs, 0 based on Foata normal form. 4/318 useless extension candidates. Maximal degree in co-relation 0. Up to 11 conditions per place. [2022-11-16 11:36:41,711 INFO L137 encePairwiseOnDemand]: 325/331 looper letters, 25 selfloop transitions, 21 changer transitions 0/287 dead transitions. [2022-11-16 11:36:41,711 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 287 transitions, 807 flow [2022-11-16 11:36:41,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-16 11:36:41,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-16 11:36:41,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 5531 transitions. [2022-11-16 11:36:41,724 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7957128470723637 [2022-11-16 11:36:41,725 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 5531 transitions. [2022-11-16 11:36:41,725 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 5531 transitions. [2022-11-16 11:36:41,729 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:36:41,729 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 5531 transitions. [2022-11-16 11:36:41,742 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 263.3809523809524) internal successors, (5531), 21 states have internal predecessors, (5531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:41,756 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 331.0) internal successors, (7282), 22 states have internal predecessors, (7282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:41,758 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 331.0) internal successors, (7282), 22 states have internal predecessors, (7282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:41,759 INFO L175 Difference]: Start difference. First operand has 285 places, 263 transitions, 607 flow. Second operand 21 states and 5531 transitions. [2022-11-16 11:36:41,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 287 transitions, 807 flow [2022-11-16 11:36:41,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 287 transitions, 793 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-16 11:36:41,767 INFO L231 Difference]: Finished difference. Result has 309 places, 276 transitions, 731 flow [2022-11-16 11:36:41,768 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=331, PETRI_DIFFERENCE_MINUEND_FLOW=601, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=731, PETRI_PLACES=309, PETRI_TRANSITIONS=276} [2022-11-16 11:36:41,768 INFO L288 CegarLoopForPetriNet]: 292 programPoint places, 17 predicate places. [2022-11-16 11:36:41,769 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 276 transitions, 731 flow [2022-11-16 11:36:41,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 263.6111111111111) internal successors, (4745), 18 states have internal predecessors, (4745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:41,771 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:36:41,771 INFO L209 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:36:41,783 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bad9430c-d2ef-4a70-8231-523d6bc0f5a3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-16 11:36:41,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bad9430c-d2ef-4a70-8231-523d6bc0f5a3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:36:41,976 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:36:41,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:36:41,977 INFO L85 PathProgramCache]: Analyzing trace with hash -1140858907, now seen corresponding path program 1 times [2022-11-16 11:36:41,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:36:41,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214667698] [2022-11-16 11:36:41,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:36:41,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:36:42,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 11:36:42,006 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-16 11:36:42,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 11:36:42,045 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-16 11:36:42,045 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-16 11:36:42,045 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-16 11:36:42,046 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-16 11:36:42,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-11-16 11:36:42,046 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-11-16 11:36:42,049 WARN L233 ceAbstractionStarter]: 7 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-16 11:36:42,049 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 8 thread instances. [2022-11-16 11:36:42,097 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2022-11-16 11:36:42,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 322 places, 366 transitions, 852 flow [2022-11-16 11:36:43,927 INFO L130 PetriNetUnfolder]: 1117/5207 cut-off events. [2022-11-16 11:36:43,927 INFO L131 PetriNetUnfolder]: For 1136/1136 co-relation queries the response was YES. [2022-11-16 11:36:44,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6292 conditions, 5207 events. 1117/5207 cut-off events. For 1136/1136 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 41834 event pairs, 522 based on Foata normal form. 0/4593 useless extension candidates. Maximal degree in co-relation 3254. Up to 1024 conditions per place. [2022-11-16 11:36:44,076 INFO L82 GeneralOperation]: Start removeDead. Operand has 322 places, 366 transitions, 852 flow [2022-11-16 11:36:44,220 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 322 places, 366 transitions, 852 flow [2022-11-16 11:36:44,221 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 11:36:44,222 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;@5c05baa, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 11:36:44,222 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-16 11:36:44,232 INFO L130 PetriNetUnfolder]: 5/92 cut-off events. [2022-11-16 11:36:44,232 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-16 11:36:44,232 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:36:44,233 INFO L209 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] [2022-11-16 11:36:44,233 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:36:44,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:36:44,234 INFO L85 PathProgramCache]: Analyzing trace with hash -651157133, now seen corresponding path program 1 times [2022-11-16 11:36:44,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:36:44,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539780010] [2022-11-16 11:36:44,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:36:44,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:36:44,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:36:44,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:44,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:36:44,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539780010] [2022-11-16 11:36:44,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539780010] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:36:44,263 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:36:44,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:36:44,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401557418] [2022-11-16 11:36:44,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:36:44,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-16 11:36:44,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:36:44,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-16 11:36:44,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 11:36:44,266 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 296 out of 366 [2022-11-16 11:36:44,267 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 366 transitions, 852 flow. Second operand has 2 states, 2 states have (on average 296.5) internal successors, (593), 2 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:44,268 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:36:44,268 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 296 of 366 [2022-11-16 11:36:44,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:36:46,043 INFO L130 PetriNetUnfolder]: 777/4858 cut-off events. [2022-11-16 11:36:46,043 INFO L131 PetriNetUnfolder]: For 3236/3290 co-relation queries the response was YES. [2022-11-16 11:36:46,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6976 conditions, 4858 events. 777/4858 cut-off events. For 3236/3290 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 40413 event pairs, 522 based on Foata normal form. 6564/11148 useless extension candidates. Maximal degree in co-relation 3499. Up to 1033 conditions per place. [2022-11-16 11:36:46,084 INFO L137 encePairwiseOnDemand]: 313/366 looper letters, 8 selfloop transitions, 0 changer transitions 28/312 dead transitions. [2022-11-16 11:36:46,084 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 312 transitions, 776 flow [2022-11-16 11:36:46,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-16 11:36:46,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-16 11:36:46,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 661 transitions. [2022-11-16 11:36:46,091 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9030054644808743 [2022-11-16 11:36:46,091 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 661 transitions. [2022-11-16 11:36:46,091 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 661 transitions. [2022-11-16 11:36:46,091 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:36:46,092 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 661 transitions. [2022-11-16 11:36:46,093 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 330.5) internal successors, (661), 2 states have internal predecessors, (661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:46,094 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 366.0) internal successors, (1098), 3 states have internal predecessors, (1098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:46,094 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 366.0) internal successors, (1098), 3 states have internal predecessors, (1098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:46,095 INFO L175 Difference]: Start difference. First operand has 322 places, 366 transitions, 852 flow. Second operand 2 states and 661 transitions. [2022-11-16 11:36:46,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 312 transitions, 776 flow [2022-11-16 11:36:46,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 312 transitions, 776 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-16 11:36:46,101 INFO L231 Difference]: Finished difference. Result has 322 places, 284 transitions, 664 flow [2022-11-16 11:36:46,101 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=366, PETRI_DIFFERENCE_MINUEND_FLOW=744, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=664, PETRI_PLACES=322, PETRI_TRANSITIONS=284} [2022-11-16 11:36:46,103 INFO L288 CegarLoopForPetriNet]: 322 programPoint places, 0 predicate places. [2022-11-16 11:36:46,103 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 284 transitions, 664 flow [2022-11-16 11:36:46,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 296.5) internal successors, (593), 2 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:46,104 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:36:46,104 INFO L209 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] [2022-11-16 11:36:46,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-11-16 11:36:46,104 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:36:46,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:36:46,105 INFO L85 PathProgramCache]: Analyzing trace with hash -522074414, now seen corresponding path program 1 times [2022-11-16 11:36:46,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:36:46,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908632346] [2022-11-16 11:36:46,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:36:46,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:36:46,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:36:46,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:46,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:36:46,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908632346] [2022-11-16 11:36:46,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908632346] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:36:46,138 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:36:46,138 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:36:46,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419573177] [2022-11-16 11:36:46,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:36:46,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:36:46,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:36:46,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:36:46,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:36:46,140 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 289 out of 366 [2022-11-16 11:36:46,141 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 284 transitions, 664 flow. Second operand has 3 states, 3 states have (on average 290.0) internal successors, (870), 3 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:46,141 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:36:46,141 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 289 of 366 [2022-11-16 11:36:46,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:36:46,277 INFO L130 PetriNetUnfolder]: 0/435 cut-off events. [2022-11-16 11:36:46,277 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2022-11-16 11:36:46,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 550 conditions, 435 events. 0/435 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1324 event pairs, 0 based on Foata normal form. 0/427 useless extension candidates. Maximal degree in co-relation 0. Up to 48 conditions per place. [2022-11-16 11:36:46,282 INFO L137 encePairwiseOnDemand]: 363/366 looper letters, 17 selfloop transitions, 2 changer transitions 0/288 dead transitions. [2022-11-16 11:36:46,282 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 288 transitions, 710 flow [2022-11-16 11:36:46,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:36:46,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-16 11:36:46,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 887 transitions. [2022-11-16 11:36:46,284 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.807832422586521 [2022-11-16 11:36:46,284 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 887 transitions. [2022-11-16 11:36:46,284 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 887 transitions. [2022-11-16 11:36:46,285 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:36:46,285 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 887 transitions. [2022-11-16 11:36:46,286 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 295.6666666666667) internal successors, (887), 3 states have internal predecessors, (887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:46,288 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 366.0) internal successors, (1464), 4 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:46,288 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 366.0) internal successors, (1464), 4 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:46,289 INFO L175 Difference]: Start difference. First operand has 322 places, 284 transitions, 664 flow. Second operand 3 states and 887 transitions. [2022-11-16 11:36:46,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 288 transitions, 710 flow [2022-11-16 11:36:46,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 288 transitions, 654 flow, removed 28 selfloop flow, removed 0 redundant places. [2022-11-16 11:36:46,295 INFO L231 Difference]: Finished difference. Result has 305 places, 285 transitions, 620 flow [2022-11-16 11:36:46,296 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=366, PETRI_DIFFERENCE_MINUEND_FLOW=608, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=620, PETRI_PLACES=305, PETRI_TRANSITIONS=285} [2022-11-16 11:36:46,296 INFO L288 CegarLoopForPetriNet]: 322 programPoint places, -17 predicate places. [2022-11-16 11:36:46,296 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 285 transitions, 620 flow [2022-11-16 11:36:46,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 290.0) internal successors, (870), 3 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:46,297 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:36:46,297 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:36:46,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-11-16 11:36:46,297 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:36:46,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:36:46,299 INFO L85 PathProgramCache]: Analyzing trace with hash -68407553, now seen corresponding path program 1 times [2022-11-16 11:36:46,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:36:46,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450959657] [2022-11-16 11:36:46,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:36:46,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:36:46,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:36:46,360 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:46,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:36:46,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450959657] [2022-11-16 11:36:46,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450959657] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:36:46,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226423162] [2022-11-16 11:36:46,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:36:46,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:36:46,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bad9430c-d2ef-4a70-8231-523d6bc0f5a3/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:36:46,362 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bad9430c-d2ef-4a70-8231-523d6bc0f5a3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:36:46,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bad9430c-d2ef-4a70-8231-523d6bc0f5a3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-16 11:36:46,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:36:46,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 11:36:46,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:36:46,562 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:46,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:36:46,604 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:46,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226423162] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:36:46,604 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:36:46,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-16 11:36:46,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623553514] [2022-11-16 11:36:46,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:36:46,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 11:36:46,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:36:46,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 11:36:46,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:36:46,609 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 288 out of 366 [2022-11-16 11:36:46,612 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 285 transitions, 620 flow. Second operand has 10 states, 10 states have (on average 290.3) internal successors, (2903), 10 states have internal predecessors, (2903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:46,612 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:36:46,612 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 288 of 366 [2022-11-16 11:36:46,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:36:46,792 INFO L130 PetriNetUnfolder]: 0/411 cut-off events. [2022-11-16 11:36:46,792 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-11-16 11:36:46,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 522 conditions, 411 events. 0/411 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1180 event pairs, 0 based on Foata normal form. 2/413 useless extension candidates. Maximal degree in co-relation 0. Up to 27 conditions per place. [2022-11-16 11:36:46,793 INFO L137 encePairwiseOnDemand]: 360/366 looper letters, 18 selfloop transitions, 9 changer transitions 0/295 dead transitions. [2022-11-16 11:36:46,794 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 295 transitions, 696 flow [2022-11-16 11:36:46,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 11:36:46,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-16 11:36:46,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2621 transitions. [2022-11-16 11:36:46,798 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7956891317547056 [2022-11-16 11:36:46,798 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2621 transitions. [2022-11-16 11:36:46,798 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2621 transitions. [2022-11-16 11:36:46,799 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:36:46,799 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2621 transitions. [2022-11-16 11:36:46,803 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 291.22222222222223) internal successors, (2621), 9 states have internal predecessors, (2621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:46,807 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 366.0) internal successors, (3660), 10 states have internal predecessors, (3660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:46,808 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 366.0) internal successors, (3660), 10 states have internal predecessors, (3660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:46,808 INFO L175 Difference]: Start difference. First operand has 305 places, 285 transitions, 620 flow. Second operand 9 states and 2621 transitions. [2022-11-16 11:36:46,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 295 transitions, 696 flow [2022-11-16 11:36:46,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 295 transitions, 694 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-16 11:36:46,814 INFO L231 Difference]: Finished difference. Result has 315 places, 291 transitions, 668 flow [2022-11-16 11:36:46,814 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=366, PETRI_DIFFERENCE_MINUEND_FLOW=618, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=668, PETRI_PLACES=315, PETRI_TRANSITIONS=291} [2022-11-16 11:36:46,815 INFO L288 CegarLoopForPetriNet]: 322 programPoint places, -7 predicate places. [2022-11-16 11:36:46,815 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 291 transitions, 668 flow [2022-11-16 11:36:46,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 290.3) internal successors, (2903), 10 states have internal predecessors, (2903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:46,816 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:36:46,816 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 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] [2022-11-16 11:36:46,826 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bad9430c-d2ef-4a70-8231-523d6bc0f5a3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-16 11:36:47,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bad9430c-d2ef-4a70-8231-523d6bc0f5a3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:36:47,027 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:36:47,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:36:47,027 INFO L85 PathProgramCache]: Analyzing trace with hash 1843813942, now seen corresponding path program 1 times [2022-11-16 11:36:47,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:36:47,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838147892] [2022-11-16 11:36:47,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:36:47,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:36:47,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:36:47,260 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:47,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:36:47,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838147892] [2022-11-16 11:36:47,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838147892] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:36:47,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551582034] [2022-11-16 11:36:47,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:36:47,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:36:47,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bad9430c-d2ef-4a70-8231-523d6bc0f5a3/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:36:47,263 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bad9430c-d2ef-4a70-8231-523d6bc0f5a3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:36:47,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bad9430c-d2ef-4a70-8231-523d6bc0f5a3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-16 11:36:47,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:36:47,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 11:36:47,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:36:47,531 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:47,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:36:47,659 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:47,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551582034] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:36:47,660 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:36:47,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-16 11:36:47,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124822703] [2022-11-16 11:36:47,661 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:36:47,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-16 11:36:47,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:36:47,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-16 11:36:47,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-16 11:36:47,668 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 288 out of 366 [2022-11-16 11:36:47,674 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 291 transitions, 668 flow. Second operand has 18 states, 18 states have (on average 290.6111111111111) internal successors, (5231), 18 states have internal predecessors, (5231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:47,674 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:36:47,674 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 288 of 366 [2022-11-16 11:36:47,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:36:48,025 INFO L130 PetriNetUnfolder]: 0/363 cut-off events. [2022-11-16 11:36:48,025 INFO L131 PetriNetUnfolder]: For 42/42 co-relation queries the response was YES. [2022-11-16 11:36:48,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 519 conditions, 363 events. 0/363 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 856 event pairs, 0 based on Foata normal form. 4/367 useless extension candidates. Maximal degree in co-relation 0. Up to 13 conditions per place. [2022-11-16 11:36:48,027 INFO L137 encePairwiseOnDemand]: 360/366 looper letters, 26 selfloop transitions, 21 changer transitions 0/315 dead transitions. [2022-11-16 11:36:48,027 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 315 transitions, 870 flow [2022-11-16 11:36:48,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-16 11:36:48,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-16 11:36:48,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 6099 transitions. [2022-11-16 11:36:48,037 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7935206869633099 [2022-11-16 11:36:48,038 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 6099 transitions. [2022-11-16 11:36:48,038 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 6099 transitions. [2022-11-16 11:36:48,041 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:36:48,041 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 6099 transitions. [2022-11-16 11:36:48,053 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 290.42857142857144) internal successors, (6099), 21 states have internal predecessors, (6099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:48,063 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 366.0) internal successors, (8052), 22 states have internal predecessors, (8052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:48,066 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 366.0) internal successors, (8052), 22 states have internal predecessors, (8052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:48,066 INFO L175 Difference]: Start difference. First operand has 315 places, 291 transitions, 668 flow. Second operand 21 states and 6099 transitions. [2022-11-16 11:36:48,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 315 transitions, 870 flow [2022-11-16 11:36:48,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 315 transitions, 856 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-16 11:36:48,074 INFO L231 Difference]: Finished difference. Result has 339 places, 304 transitions, 792 flow [2022-11-16 11:36:48,075 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=366, PETRI_DIFFERENCE_MINUEND_FLOW=662, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=792, PETRI_PLACES=339, PETRI_TRANSITIONS=304} [2022-11-16 11:36:48,075 INFO L288 CegarLoopForPetriNet]: 322 programPoint places, 17 predicate places. [2022-11-16 11:36:48,075 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 304 transitions, 792 flow [2022-11-16 11:36:48,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 290.6111111111111) internal successors, (5231), 18 states have internal predecessors, (5231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:48,077 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:36:48,077 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:36:48,086 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bad9430c-d2ef-4a70-8231-523d6bc0f5a3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-16 11:36:48,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bad9430c-d2ef-4a70-8231-523d6bc0f5a3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-11-16 11:36:48,283 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:36:48,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:36:48,284 INFO L85 PathProgramCache]: Analyzing trace with hash 48126744, now seen corresponding path program 1 times [2022-11-16 11:36:48,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:36:48,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649304642] [2022-11-16 11:36:48,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:36:48,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:36:48,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:36:48,765 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:48,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:36:48,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649304642] [2022-11-16 11:36:48,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649304642] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:36:48,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937223600] [2022-11-16 11:36:48,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:36:48,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:36:48,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bad9430c-d2ef-4a70-8231-523d6bc0f5a3/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:36:48,769 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bad9430c-d2ef-4a70-8231-523d6bc0f5a3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:36:48,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bad9430c-d2ef-4a70-8231-523d6bc0f5a3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-16 11:36:48,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:36:48,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 11:36:48,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:36:49,140 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:49,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:36:49,534 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:49,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937223600] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:36:49,535 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:36:49,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-16 11:36:49,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246373525] [2022-11-16 11:36:49,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:36:49,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-16 11:36:49,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:36:49,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-16 11:36:49,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-16 11:36:49,549 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 288 out of 366 [2022-11-16 11:36:49,567 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 304 transitions, 792 flow. Second operand has 34 states, 34 states have (on average 290.79411764705884) internal successors, (9887), 34 states have internal predecessors, (9887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:49,568 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:36:49,568 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 288 of 366 [2022-11-16 11:36:49,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:36:50,014 INFO L130 PetriNetUnfolder]: 0/339 cut-off events. [2022-11-16 11:36:50,014 INFO L131 PetriNetUnfolder]: For 87/87 co-relation queries the response was YES. [2022-11-16 11:36:50,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 523 conditions, 339 events. 0/339 cut-off events. For 87/87 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 717 event pairs, 0 based on Foata normal form. 2/341 useless extension candidates. Maximal degree in co-relation 0. Up to 13 conditions per place. [2022-11-16 11:36:50,015 INFO L137 encePairwiseOnDemand]: 361/366 looper letters, 27 selfloop transitions, 25 changer transitions 0/309 dead transitions. [2022-11-16 11:36:50,015 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 309 transitions, 938 flow [2022-11-16 11:36:50,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-16 11:36:50,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-11-16 11:36:50,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 7830 transitions. [2022-11-16 11:36:50,025 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7923497267759563 [2022-11-16 11:36:50,025 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 7830 transitions. [2022-11-16 11:36:50,025 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 7830 transitions. [2022-11-16 11:36:50,028 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:36:50,028 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 7830 transitions. [2022-11-16 11:36:50,039 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 290.0) internal successors, (7830), 27 states have internal predecessors, (7830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:50,049 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 366.0) internal successors, (10248), 28 states have internal predecessors, (10248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:50,052 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 366.0) internal successors, (10248), 28 states have internal predecessors, (10248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:50,052 INFO L175 Difference]: Start difference. First operand has 339 places, 304 transitions, 792 flow. Second operand 27 states and 7830 transitions. [2022-11-16 11:36:50,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 309 transitions, 938 flow [2022-11-16 11:36:50,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 309 transitions, 884 flow, removed 7 selfloop flow, removed 13 redundant places. [2022-11-16 11:36:50,060 INFO L231 Difference]: Finished difference. Result has 340 places, 295 transitions, 777 flow [2022-11-16 11:36:50,061 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=366, PETRI_DIFFERENCE_MINUEND_FLOW=709, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=777, PETRI_PLACES=340, PETRI_TRANSITIONS=295} [2022-11-16 11:36:50,061 INFO L288 CegarLoopForPetriNet]: 322 programPoint places, 18 predicate places. [2022-11-16 11:36:50,062 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 295 transitions, 777 flow [2022-11-16 11:36:50,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 290.79411764705884) internal successors, (9887), 34 states have internal predecessors, (9887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:50,064 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:36:50,064 INFO L209 CegarLoopForPetriNet]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:36:50,083 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bad9430c-d2ef-4a70-8231-523d6bc0f5a3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-16 11:36:50,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bad9430c-d2ef-4a70-8231-523d6bc0f5a3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-11-16 11:36:50,270 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:36:50,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:36:50,271 INFO L85 PathProgramCache]: Analyzing trace with hash 1647173781, now seen corresponding path program 1 times [2022-11-16 11:36:50,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:36:50,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743822181] [2022-11-16 11:36:50,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:36:50,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:36:50,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 11:36:50,296 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-16 11:36:50,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 11:36:50,329 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-16 11:36:50,329 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-16 11:36:50,330 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-16 11:36:50,330 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-16 11:36:50,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-11-16 11:36:50,330 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-11-16 11:36:50,331 WARN L233 ceAbstractionStarter]: 8 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-16 11:36:50,331 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 9 thread instances. [2022-11-16 11:36:50,376 INFO L144 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2022-11-16 11:36:50,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 352 places, 401 transitions, 946 flow [2022-11-16 11:36:53,412 INFO L130 PetriNetUnfolder]: 2408/10138 cut-off events. [2022-11-16 11:36:53,412 INFO L131 PetriNetUnfolder]: For 2460/2460 co-relation queries the response was YES. [2022-11-16 11:36:53,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12515 conditions, 10138 events. 2408/10138 cut-off events. For 2460/2460 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 94249 event pairs, 1291 based on Foata normal form. 0/9000 useless extension candidates. Maximal degree in co-relation 6274. Up to 2304 conditions per place. [2022-11-16 11:36:53,703 INFO L82 GeneralOperation]: Start removeDead. Operand has 352 places, 401 transitions, 946 flow [2022-11-16 11:36:53,876 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 352 places, 401 transitions, 946 flow [2022-11-16 11:36:53,877 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 11:36:53,880 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;@5c05baa, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 11:36:53,880 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-16 11:36:54,026 INFO L130 PetriNetUnfolder]: 5/92 cut-off events. [2022-11-16 11:36:54,027 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-16 11:36:54,027 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:36:54,027 INFO L209 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] [2022-11-16 11:36:54,027 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:36:54,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:36:54,027 INFO L85 PathProgramCache]: Analyzing trace with hash 1324590739, now seen corresponding path program 1 times [2022-11-16 11:36:54,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:36:54,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555031793] [2022-11-16 11:36:54,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:36:54,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:36:54,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:36:54,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:54,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:36:54,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555031793] [2022-11-16 11:36:54,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555031793] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:36:54,056 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:36:54,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:36:54,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285557996] [2022-11-16 11:36:54,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:36:54,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-16 11:36:54,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:36:54,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-16 11:36:54,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 11:36:54,063 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 323 out of 401 [2022-11-16 11:36:54,064 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 401 transitions, 946 flow. Second operand has 2 states, 2 states have (on average 323.5) internal successors, (647), 2 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:54,064 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:36:54,064 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 323 of 401 [2022-11-16 11:36:54,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:36:57,472 INFO L130 PetriNetUnfolder]: 1802/9522 cut-off events. [2022-11-16 11:36:57,473 INFO L131 PetriNetUnfolder]: For 7116/7150 co-relation queries the response was YES. [2022-11-16 11:36:57,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14213 conditions, 9522 events. 1802/9522 cut-off events. For 7116/7150 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 91635 event pairs, 1291 based on Foata normal form. 14546/23536 useless extension candidates. Maximal degree in co-relation 6957. Up to 2314 conditions per place. [2022-11-16 11:36:57,621 INFO L137 encePairwiseOnDemand]: 342/401 looper letters, 9 selfloop transitions, 0 changer transitions 29/341 dead transitions. [2022-11-16 11:36:57,621 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 341 transitions, 862 flow [2022-11-16 11:36:57,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-16 11:36:57,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-16 11:36:57,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 723 transitions. [2022-11-16 11:36:57,624 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9014962593516209 [2022-11-16 11:36:57,624 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 723 transitions. [2022-11-16 11:36:57,625 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 723 transitions. [2022-11-16 11:36:57,626 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:36:57,626 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 723 transitions. [2022-11-16 11:36:57,627 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 361.5) internal successors, (723), 2 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:57,629 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 401.0) internal successors, (1203), 3 states have internal predecessors, (1203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:57,629 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 401.0) internal successors, (1203), 3 states have internal predecessors, (1203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:57,629 INFO L175 Difference]: Start difference. First operand has 352 places, 401 transitions, 946 flow. Second operand 2 states and 723 transitions. [2022-11-16 11:36:57,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 341 transitions, 862 flow [2022-11-16 11:36:57,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 341 transitions, 862 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-16 11:36:57,641 INFO L231 Difference]: Finished difference. Result has 352 places, 312 transitions, 741 flow [2022-11-16 11:36:57,648 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=401, PETRI_DIFFERENCE_MINUEND_FLOW=826, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=741, PETRI_PLACES=352, PETRI_TRANSITIONS=312} [2022-11-16 11:36:57,648 INFO L288 CegarLoopForPetriNet]: 352 programPoint places, 0 predicate places. [2022-11-16 11:36:57,649 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 312 transitions, 741 flow [2022-11-16 11:36:57,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 323.5) internal successors, (647), 2 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:57,649 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:36:57,649 INFO L209 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] [2022-11-16 11:36:57,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-11-16 11:36:57,650 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:36:57,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:36:57,653 INFO L85 PathProgramCache]: Analyzing trace with hash 1453673458, now seen corresponding path program 1 times [2022-11-16 11:36:57,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:36:57,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20599319] [2022-11-16 11:36:57,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:36:57,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:36:57,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:36:57,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:57,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:36:57,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20599319] [2022-11-16 11:36:57,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20599319] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:36:57,686 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:36:57,687 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:36:57,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125875660] [2022-11-16 11:36:57,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:36:57,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:36:57,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:36:57,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:36:57,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:36:57,689 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 316 out of 401 [2022-11-16 11:36:57,690 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 312 transitions, 741 flow. Second operand has 3 states, 3 states have (on average 317.0) internal successors, (951), 3 states have internal predecessors, (951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:57,690 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:36:57,690 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 316 of 401 [2022-11-16 11:36:57,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:36:57,858 INFO L130 PetriNetUnfolder]: 0/484 cut-off events. [2022-11-16 11:36:57,858 INFO L131 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2022-11-16 11:36:57,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 617 conditions, 484 events. 0/484 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1511 event pairs, 0 based on Foata normal form. 0/475 useless extension candidates. Maximal degree in co-relation 0. Up to 54 conditions per place. [2022-11-16 11:36:57,860 INFO L137 encePairwiseOnDemand]: 398/401 looper letters, 18 selfloop transitions, 2 changer transitions 0/316 dead transitions. [2022-11-16 11:36:57,860 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 316 transitions, 789 flow [2022-11-16 11:36:57,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:36:57,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-16 11:36:57,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 969 transitions. [2022-11-16 11:36:57,862 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8054862842892768 [2022-11-16 11:36:57,863 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 969 transitions. [2022-11-16 11:36:57,863 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 969 transitions. [2022-11-16 11:36:57,863 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:36:57,864 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 969 transitions. [2022-11-16 11:36:57,867 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 323.0) internal successors, (969), 3 states have internal predecessors, (969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:57,869 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 401.0) internal successors, (1604), 4 states have internal predecessors, (1604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:57,869 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 401.0) internal successors, (1604), 4 states have internal predecessors, (1604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:57,870 INFO L175 Difference]: Start difference. First operand has 352 places, 312 transitions, 741 flow. Second operand 3 states and 969 transitions. [2022-11-16 11:36:57,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 316 transitions, 789 flow [2022-11-16 11:36:57,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 316 transitions, 717 flow, removed 36 selfloop flow, removed 0 redundant places. [2022-11-16 11:36:57,876 INFO L231 Difference]: Finished difference. Result has 335 places, 313 transitions, 681 flow [2022-11-16 11:36:57,877 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=401, PETRI_DIFFERENCE_MINUEND_FLOW=669, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=681, PETRI_PLACES=335, PETRI_TRANSITIONS=313} [2022-11-16 11:36:57,877 INFO L288 CegarLoopForPetriNet]: 352 programPoint places, -17 predicate places. [2022-11-16 11:36:57,877 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 313 transitions, 681 flow [2022-11-16 11:36:57,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 317.0) internal successors, (951), 3 states have internal predecessors, (951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:57,878 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:36:57,878 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:36:57,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-11-16 11:36:57,878 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:36:57,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:36:57,879 INFO L85 PathProgramCache]: Analyzing trace with hash 1541315774, now seen corresponding path program 1 times [2022-11-16 11:36:57,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:36:57,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598800252] [2022-11-16 11:36:57,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:36:57,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:36:57,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:36:57,941 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:57,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:36:57,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598800252] [2022-11-16 11:36:57,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598800252] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:36:57,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633883308] [2022-11-16 11:36:57,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:36:57,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:36:57,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bad9430c-d2ef-4a70-8231-523d6bc0f5a3/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:36:57,947 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bad9430c-d2ef-4a70-8231-523d6bc0f5a3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:36:57,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bad9430c-d2ef-4a70-8231-523d6bc0f5a3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-16 11:36:58,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:36:58,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 11:36:58,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:36:58,203 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:58,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:36:58,252 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:58,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633883308] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:36:58,252 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:36:58,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-16 11:36:58,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130595496] [2022-11-16 11:36:58,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:36:58,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 11:36:58,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:36:58,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 11:36:58,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:36:58,257 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 315 out of 401 [2022-11-16 11:36:58,259 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 313 transitions, 681 flow. Second operand has 10 states, 10 states have (on average 317.3) internal successors, (3173), 10 states have internal predecessors, (3173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:58,260 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:36:58,260 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 315 of 401 [2022-11-16 11:36:58,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:36:58,647 INFO L130 PetriNetUnfolder]: 0/460 cut-off events. [2022-11-16 11:36:58,647 INFO L131 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2022-11-16 11:36:58,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 584 conditions, 460 events. 0/460 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1363 event pairs, 0 based on Foata normal form. 2/462 useless extension candidates. Maximal degree in co-relation 0. Up to 31 conditions per place. [2022-11-16 11:36:58,649 INFO L137 encePairwiseOnDemand]: 395/401 looper letters, 19 selfloop transitions, 9 changer transitions 0/323 dead transitions. [2022-11-16 11:36:58,649 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 323 transitions, 759 flow [2022-11-16 11:36:58,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 11:36:58,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-16 11:36:58,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2865 transitions. [2022-11-16 11:36:58,654 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7938487115544473 [2022-11-16 11:36:58,654 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2865 transitions. [2022-11-16 11:36:58,654 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2865 transitions. [2022-11-16 11:36:58,655 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:36:58,655 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2865 transitions. [2022-11-16 11:36:58,662 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 318.3333333333333) internal successors, (2865), 9 states have internal predecessors, (2865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:58,667 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 401.0) internal successors, (4010), 10 states have internal predecessors, (4010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:58,669 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 401.0) internal successors, (4010), 10 states have internal predecessors, (4010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:58,669 INFO L175 Difference]: Start difference. First operand has 335 places, 313 transitions, 681 flow. Second operand 9 states and 2865 transitions. [2022-11-16 11:36:58,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 323 transitions, 759 flow [2022-11-16 11:36:58,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 323 transitions, 757 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-16 11:36:58,678 INFO L231 Difference]: Finished difference. Result has 345 places, 319 transitions, 729 flow [2022-11-16 11:36:58,679 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=401, PETRI_DIFFERENCE_MINUEND_FLOW=679, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=729, PETRI_PLACES=345, PETRI_TRANSITIONS=319} [2022-11-16 11:36:58,680 INFO L288 CegarLoopForPetriNet]: 352 programPoint places, -7 predicate places. [2022-11-16 11:36:58,680 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 319 transitions, 729 flow [2022-11-16 11:36:58,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 317.3) internal successors, (3173), 10 states have internal predecessors, (3173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:58,681 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:36:58,681 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 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] [2022-11-16 11:36:58,695 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bad9430c-d2ef-4a70-8231-523d6bc0f5a3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-16 11:36:58,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bad9430c-d2ef-4a70-8231-523d6bc0f5a3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-11-16 11:36:58,888 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:36:58,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:36:58,888 INFO L85 PathProgramCache]: Analyzing trace with hash -1958994701, now seen corresponding path program 1 times [2022-11-16 11:36:58,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:36:58,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203784722] [2022-11-16 11:36:58,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:36:58,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:36:58,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:36:59,052 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:59,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:36:59,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203784722] [2022-11-16 11:36:59,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203784722] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:36:59,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689796193] [2022-11-16 11:36:59,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:36:59,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:36:59,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bad9430c-d2ef-4a70-8231-523d6bc0f5a3/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:36:59,057 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bad9430c-d2ef-4a70-8231-523d6bc0f5a3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:36:59,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bad9430c-d2ef-4a70-8231-523d6bc0f5a3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-16 11:36:59,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:36:59,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 11:36:59,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:36:59,341 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:59,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:36:59,483 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:59,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689796193] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:36:59,484 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:36:59,484 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-16 11:36:59,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118179784] [2022-11-16 11:36:59,485 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:36:59,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-16 11:36:59,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:36:59,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-16 11:36:59,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-16 11:36:59,494 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 315 out of 401 [2022-11-16 11:36:59,521 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 319 transitions, 729 flow. Second operand has 18 states, 18 states have (on average 317.6111111111111) internal successors, (5717), 18 states have internal predecessors, (5717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:59,521 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:36:59,521 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 315 of 401 [2022-11-16 11:36:59,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:36:59,928 INFO L130 PetriNetUnfolder]: 0/412 cut-off events. [2022-11-16 11:36:59,928 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-11-16 11:36:59,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 589 conditions, 412 events. 0/412 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1042 event pairs, 0 based on Foata normal form. 4/416 useless extension candidates. Maximal degree in co-relation 0. Up to 15 conditions per place. [2022-11-16 11:36:59,929 INFO L137 encePairwiseOnDemand]: 395/401 looper letters, 27 selfloop transitions, 21 changer transitions 0/343 dead transitions. [2022-11-16 11:36:59,929 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 343 transitions, 933 flow [2022-11-16 11:36:59,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-16 11:36:59,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-16 11:36:59,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 6667 transitions. [2022-11-16 11:36:59,941 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7917111981949887 [2022-11-16 11:36:59,942 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 6667 transitions. [2022-11-16 11:36:59,942 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 6667 transitions. [2022-11-16 11:36:59,945 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:36:59,945 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 6667 transitions. [2022-11-16 11:36:59,959 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 317.4761904761905) internal successors, (6667), 21 states have internal predecessors, (6667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:59,971 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 401.0) internal successors, (8822), 22 states have internal predecessors, (8822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:59,973 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 401.0) internal successors, (8822), 22 states have internal predecessors, (8822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:59,973 INFO L175 Difference]: Start difference. First operand has 345 places, 319 transitions, 729 flow. Second operand 21 states and 6667 transitions. [2022-11-16 11:36:59,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 343 transitions, 933 flow [2022-11-16 11:36:59,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 343 transitions, 919 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-16 11:36:59,984 INFO L231 Difference]: Finished difference. Result has 369 places, 332 transitions, 853 flow [2022-11-16 11:36:59,985 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=401, PETRI_DIFFERENCE_MINUEND_FLOW=723, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=853, PETRI_PLACES=369, PETRI_TRANSITIONS=332} [2022-11-16 11:36:59,985 INFO L288 CegarLoopForPetriNet]: 352 programPoint places, 17 predicate places. [2022-11-16 11:36:59,986 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 332 transitions, 853 flow [2022-11-16 11:36:59,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 317.6111111111111) internal successors, (5717), 18 states have internal predecessors, (5717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:59,987 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:36:59,988 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:36:59,999 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bad9430c-d2ef-4a70-8231-523d6bc0f5a3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-16 11:37:00,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bad9430c-d2ef-4a70-8231-523d6bc0f5a3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:37:00,194 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:37:00,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:37:00,195 INFO L85 PathProgramCache]: Analyzing trace with hash -1924072751, now seen corresponding path program 1 times [2022-11-16 11:37:00,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:37:00,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168416414] [2022-11-16 11:37:00,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:37:00,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:37:00,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:37:00,630 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:37:00,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:37:00,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168416414] [2022-11-16 11:37:00,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168416414] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:37:00,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943338698] [2022-11-16 11:37:00,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:37:00,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:37:00,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bad9430c-d2ef-4a70-8231-523d6bc0f5a3/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:37:00,633 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bad9430c-d2ef-4a70-8231-523d6bc0f5a3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:37:00,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bad9430c-d2ef-4a70-8231-523d6bc0f5a3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-16 11:37:00,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:37:00,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 11:37:00,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:37:01,023 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:37:01,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:37:01,415 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:37:01,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943338698] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:37:01,416 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:37:01,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-16 11:37:01,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753798445] [2022-11-16 11:37:01,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:37:01,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-16 11:37:01,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:37:01,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-16 11:37:01,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-16 11:37:01,430 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 315 out of 401 [2022-11-16 11:37:01,438 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 332 transitions, 853 flow. Second operand has 34 states, 34 states have (on average 317.79411764705884) internal successors, (10805), 34 states have internal predecessors, (10805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:01,438 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:37:01,438 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 315 of 401 [2022-11-16 11:37:01,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:37:02,067 INFO L130 PetriNetUnfolder]: 0/376 cut-off events. [2022-11-16 11:37:02,068 INFO L131 PetriNetUnfolder]: For 114/114 co-relation queries the response was YES. [2022-11-16 11:37:02,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 582 conditions, 376 events. 0/376 cut-off events. For 114/114 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 821 event pairs, 0 based on Foata normal form. 3/379 useless extension candidates. Maximal degree in co-relation 0. Up to 15 conditions per place. [2022-11-16 11:37:02,069 INFO L137 encePairwiseOnDemand]: 396/401 looper letters, 30 selfloop transitions, 28 changer transitions 0/342 dead transitions. [2022-11-16 11:37:02,069 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 342 transitions, 1045 flow [2022-11-16 11:37:02,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-16 11:37:02,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-11-16 11:37:02,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 9511 transitions. [2022-11-16 11:37:02,082 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7906068162926019 [2022-11-16 11:37:02,083 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 9511 transitions. [2022-11-16 11:37:02,083 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 9511 transitions. [2022-11-16 11:37:02,086 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:37:02,087 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 9511 transitions. [2022-11-16 11:37:02,108 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 317.03333333333336) internal successors, (9511), 30 states have internal predecessors, (9511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:02,128 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 401.0) internal successors, (12431), 31 states have internal predecessors, (12431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:02,130 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 401.0) internal successors, (12431), 31 states have internal predecessors, (12431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:02,131 INFO L175 Difference]: Start difference. First operand has 369 places, 332 transitions, 853 flow. Second operand 30 states and 9511 transitions. [2022-11-16 11:37:02,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 342 transitions, 1045 flow [2022-11-16 11:37:02,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 342 transitions, 985 flow, removed 8 selfloop flow, removed 13 redundant places. [2022-11-16 11:37:02,141 INFO L231 Difference]: Finished difference. Result has 373 places, 326 transitions, 862 flow [2022-11-16 11:37:02,142 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=401, PETRI_DIFFERENCE_MINUEND_FLOW=770, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=862, PETRI_PLACES=373, PETRI_TRANSITIONS=326} [2022-11-16 11:37:02,143 INFO L288 CegarLoopForPetriNet]: 352 programPoint places, 21 predicate places. [2022-11-16 11:37:02,143 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 326 transitions, 862 flow [2022-11-16 11:37:02,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 317.79411764705884) internal successors, (10805), 34 states have internal predecessors, (10805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:02,145 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:37:02,145 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:37:02,160 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bad9430c-d2ef-4a70-8231-523d6bc0f5a3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-16 11:37:02,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bad9430c-d2ef-4a70-8231-523d6bc0f5a3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-11-16 11:37:02,355 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:37:02,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:37:02,355 INFO L85 PathProgramCache]: Analyzing trace with hash 1544269931, now seen corresponding path program 1 times [2022-11-16 11:37:02,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:37:02,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812039474] [2022-11-16 11:37:02,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:37:02,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:37:02,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 11:37:02,385 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-16 11:37:02,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 11:37:02,423 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-16 11:37:02,424 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-16 11:37:02,424 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-16 11:37:02,424 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-16 11:37:02,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-11-16 11:37:02,425 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-11-16 11:37:02,425 WARN L233 ceAbstractionStarter]: 9 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-16 11:37:02,426 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 10 thread instances. [2022-11-16 11:37:02,470 INFO L144 ThreadInstanceAdder]: Constructed 10 joinOtherThreadTransitions. [2022-11-16 11:37:02,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 382 places, 436 transitions, 1042 flow [2022-11-16 11:37:09,414 INFO L130 PetriNetUnfolder]: 5235/20189 cut-off events. [2022-11-16 11:37:09,414 INFO L131 PetriNetUnfolder]: For 5330/5330 co-relation queries the response was YES. [2022-11-16 11:37:10,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25395 conditions, 20189 events. 5235/20189 cut-off events. For 5330/5330 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 211334 event pairs, 3084 based on Foata normal form. 0/18015 useless extension candidates. Maximal degree in co-relation 12495. Up to 5120 conditions per place. [2022-11-16 11:37:10,352 INFO L82 GeneralOperation]: Start removeDead. Operand has 382 places, 436 transitions, 1042 flow [2022-11-16 11:37:10,942 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 382 places, 436 transitions, 1042 flow [2022-11-16 11:37:10,942 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 11:37:10,943 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;@5c05baa, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 11:37:10,943 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-16 11:37:10,948 INFO L130 PetriNetUnfolder]: 5/92 cut-off events. [2022-11-16 11:37:10,948 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-16 11:37:10,948 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:37:10,948 INFO L209 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] [2022-11-16 11:37:10,949 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:37:10,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:37:10,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1759082771, now seen corresponding path program 1 times [2022-11-16 11:37:10,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:37:10,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064290104] [2022-11-16 11:37:10,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:37:10,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:37:10,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:37:10,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:37:10,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:37:10,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064290104] [2022-11-16 11:37:10,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064290104] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:37:10,971 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:37:10,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:37:10,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087336787] [2022-11-16 11:37:10,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:37:10,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-16 11:37:10,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:37:10,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-16 11:37:10,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 11:37:10,974 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 350 out of 436 [2022-11-16 11:37:10,975 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 436 transitions, 1042 flow. Second operand has 2 states, 2 states have (on average 350.5) internal successors, (701), 2 states have internal predecessors, (701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:10,975 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:37:10,975 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 350 of 436 [2022-11-16 11:37:10,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:37:19,442 INFO L130 PetriNetUnfolder]: 4107/19050 cut-off events. [2022-11-16 11:37:19,442 INFO L131 PetriNetUnfolder]: For 15633/15679 co-relation queries the response was YES. [2022-11-16 11:37:20,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29387 conditions, 19050 events. 4107/19050 cut-off events. For 15633/15679 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 206922 event pairs, 3084 based on Foata normal form. 32006/50010 useless extension candidates. Maximal degree in co-relation 14192. Up to 5131 conditions per place. [2022-11-16 11:37:20,025 INFO L137 encePairwiseOnDemand]: 371/436 looper letters, 10 selfloop transitions, 0 changer transitions 30/370 dead transitions. [2022-11-16 11:37:20,025 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 370 transitions, 950 flow [2022-11-16 11:37:20,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-16 11:37:20,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-16 11:37:20,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 785 transitions. [2022-11-16 11:37:20,028 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9002293577981652 [2022-11-16 11:37:20,028 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 785 transitions. [2022-11-16 11:37:20,028 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 785 transitions. [2022-11-16 11:37:20,029 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:37:20,029 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 785 transitions. [2022-11-16 11:37:20,031 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 392.5) internal successors, (785), 2 states have internal predecessors, (785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:20,034 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 436.0) internal successors, (1308), 3 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:20,034 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 436.0) internal successors, (1308), 3 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:20,034 INFO L175 Difference]: Start difference. First operand has 382 places, 436 transitions, 1042 flow. Second operand 2 states and 785 transitions. [2022-11-16 11:37:20,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 370 transitions, 950 flow [2022-11-16 11:37:20,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 370 transitions, 950 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-16 11:37:20,051 INFO L231 Difference]: Finished difference. Result has 382 places, 340 transitions, 820 flow [2022-11-16 11:37:20,052 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=910, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=370, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=820, PETRI_PLACES=382, PETRI_TRANSITIONS=340} [2022-11-16 11:37:20,053 INFO L288 CegarLoopForPetriNet]: 382 programPoint places, 0 predicate places. [2022-11-16 11:37:20,053 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 340 transitions, 820 flow [2022-11-16 11:37:20,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 350.5) internal successors, (701), 2 states have internal predecessors, (701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:20,054 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:37:20,054 INFO L209 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] [2022-11-16 11:37:20,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-11-16 11:37:20,054 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:37:20,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:37:20,055 INFO L85 PathProgramCache]: Analyzing trace with hash 1888165490, now seen corresponding path program 1 times [2022-11-16 11:37:20,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:37:20,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696067554] [2022-11-16 11:37:20,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:37:20,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:37:20,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:37:20,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:37:20,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:37:20,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696067554] [2022-11-16 11:37:20,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696067554] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:37:20,100 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:37:20,101 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:37:20,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372849403] [2022-11-16 11:37:20,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:37:20,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:37:20,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:37:20,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:37:20,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:37:20,104 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 343 out of 436 [2022-11-16 11:37:20,106 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 340 transitions, 820 flow. Second operand has 3 states, 3 states have (on average 344.0) internal successors, (1032), 3 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:20,106 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:37:20,106 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 343 of 436 [2022-11-16 11:37:20,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:37:20,383 INFO L130 PetriNetUnfolder]: 0/533 cut-off events. [2022-11-16 11:37:20,384 INFO L131 PetriNetUnfolder]: For 210/210 co-relation queries the response was YES. [2022-11-16 11:37:20,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 685 conditions, 533 events. 0/533 cut-off events. For 210/210 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1697 event pairs, 0 based on Foata normal form. 0/523 useless extension candidates. Maximal degree in co-relation 0. Up to 60 conditions per place. [2022-11-16 11:37:20,386 INFO L137 encePairwiseOnDemand]: 433/436 looper letters, 19 selfloop transitions, 2 changer transitions 0/344 dead transitions. [2022-11-16 11:37:20,386 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 344 transitions, 870 flow [2022-11-16 11:37:20,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:37:20,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-16 11:37:20,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1051 transitions. [2022-11-16 11:37:20,390 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8035168195718655 [2022-11-16 11:37:20,390 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1051 transitions. [2022-11-16 11:37:20,390 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1051 transitions. [2022-11-16 11:37:20,391 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:37:20,391 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1051 transitions. [2022-11-16 11:37:20,394 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 350.3333333333333) internal successors, (1051), 3 states have internal predecessors, (1051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:20,396 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 436.0) internal successors, (1744), 4 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:20,397 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 436.0) internal successors, (1744), 4 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:20,397 INFO L175 Difference]: Start difference. First operand has 382 places, 340 transitions, 820 flow. Second operand 3 states and 1051 transitions. [2022-11-16 11:37:20,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 344 transitions, 870 flow [2022-11-16 11:37:20,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 344 transitions, 780 flow, removed 45 selfloop flow, removed 0 redundant places. [2022-11-16 11:37:20,408 INFO L231 Difference]: Finished difference. Result has 365 places, 341 transitions, 742 flow [2022-11-16 11:37:20,409 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=730, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=742, PETRI_PLACES=365, PETRI_TRANSITIONS=341} [2022-11-16 11:37:20,409 INFO L288 CegarLoopForPetriNet]: 382 programPoint places, -17 predicate places. [2022-11-16 11:37:20,410 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 341 transitions, 742 flow [2022-11-16 11:37:20,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 344.0) internal successors, (1032), 3 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:20,410 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:37:20,411 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:37:20,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-11-16 11:37:20,411 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:37:20,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:37:20,412 INFO L85 PathProgramCache]: Analyzing trace with hash 358237629, now seen corresponding path program 1 times [2022-11-16 11:37:20,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:37:20,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152151243] [2022-11-16 11:37:20,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:37:20,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:37:20,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:37:20,492 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:37:20,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:37:20,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152151243] [2022-11-16 11:37:20,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152151243] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:37:20,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575538158] [2022-11-16 11:37:20,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:37:20,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:37:20,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bad9430c-d2ef-4a70-8231-523d6bc0f5a3/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:37:20,496 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bad9430c-d2ef-4a70-8231-523d6bc0f5a3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:37:20,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bad9430c-d2ef-4a70-8231-523d6bc0f5a3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-16 11:37:21,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:37:21,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 11:37:21,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:37:21,094 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:37:21,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:37:21,137 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:37:21,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575538158] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:37:21,138 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:37:21,138 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-16 11:37:21,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608353561] [2022-11-16 11:37:21,139 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:37:21,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 11:37:21,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:37:21,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 11:37:21,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:37:21,144 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 342 out of 436 [2022-11-16 11:37:21,147 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 341 transitions, 742 flow. Second operand has 10 states, 10 states have (on average 344.3) internal successors, (3443), 10 states have internal predecessors, (3443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:21,148 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:37:21,148 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 342 of 436 [2022-11-16 11:37:21,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:37:21,424 INFO L130 PetriNetUnfolder]: 0/509 cut-off events. [2022-11-16 11:37:21,424 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2022-11-16 11:37:21,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 646 conditions, 509 events. 0/509 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1548 event pairs, 0 based on Foata normal form. 2/511 useless extension candidates. Maximal degree in co-relation 0. Up to 35 conditions per place. [2022-11-16 11:37:21,426 INFO L137 encePairwiseOnDemand]: 430/436 looper letters, 20 selfloop transitions, 9 changer transitions 0/351 dead transitions. [2022-11-16 11:37:21,427 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 351 transitions, 822 flow [2022-11-16 11:37:21,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 11:37:21,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-16 11:37:21,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 3109 transitions. [2022-11-16 11:37:21,431 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7923037716615698 [2022-11-16 11:37:21,432 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 3109 transitions. [2022-11-16 11:37:21,432 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 3109 transitions. [2022-11-16 11:37:21,433 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:37:21,433 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 3109 transitions. [2022-11-16 11:37:21,438 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 345.44444444444446) internal successors, (3109), 9 states have internal predecessors, (3109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:21,442 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 436.0) internal successors, (4360), 10 states have internal predecessors, (4360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:21,444 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 436.0) internal successors, (4360), 10 states have internal predecessors, (4360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:21,444 INFO L175 Difference]: Start difference. First operand has 365 places, 341 transitions, 742 flow. Second operand 9 states and 3109 transitions. [2022-11-16 11:37:21,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 351 transitions, 822 flow [2022-11-16 11:37:21,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 351 transitions, 820 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-16 11:37:21,452 INFO L231 Difference]: Finished difference. Result has 375 places, 347 transitions, 790 flow [2022-11-16 11:37:21,453 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=740, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=790, PETRI_PLACES=375, PETRI_TRANSITIONS=347} [2022-11-16 11:37:21,454 INFO L288 CegarLoopForPetriNet]: 382 programPoint places, -7 predicate places. [2022-11-16 11:37:21,454 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 347 transitions, 790 flow [2022-11-16 11:37:21,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 344.3) internal successors, (3443), 10 states have internal predecessors, (3443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:21,455 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:37:21,456 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 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] [2022-11-16 11:37:21,463 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bad9430c-d2ef-4a70-8231-523d6bc0f5a3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-16 11:37:21,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bad9430c-d2ef-4a70-8231-523d6bc0f5a3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:37:21,664 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:37:21,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:37:21,665 INFO L85 PathProgramCache]: Analyzing trace with hash 1495231152, now seen corresponding path program 1 times [2022-11-16 11:37:21,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:37:21,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406936495] [2022-11-16 11:37:21,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:37:21,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:37:21,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:37:21,812 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:37:21,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:37:21,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406936495] [2022-11-16 11:37:21,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406936495] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:37:21,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049578681] [2022-11-16 11:37:21,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:37:21,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:37:21,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bad9430c-d2ef-4a70-8231-523d6bc0f5a3/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:37:21,815 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bad9430c-d2ef-4a70-8231-523d6bc0f5a3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:37:21,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bad9430c-d2ef-4a70-8231-523d6bc0f5a3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-16 11:37:22,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:37:22,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 11:37:22,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:37:22,172 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:37:22,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:37:22,322 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:37:22,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049578681] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:37:22,323 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:37:22,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-16 11:37:22,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851703294] [2022-11-16 11:37:22,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:37:22,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-16 11:37:22,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:37:22,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-16 11:37:22,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-16 11:37:22,329 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 342 out of 436 [2022-11-16 11:37:22,334 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 347 transitions, 790 flow. Second operand has 18 states, 18 states have (on average 344.6111111111111) internal successors, (6203), 18 states have internal predecessors, (6203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:22,334 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:37:22,334 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 342 of 436 [2022-11-16 11:37:22,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:37:22,765 INFO L130 PetriNetUnfolder]: 0/461 cut-off events. [2022-11-16 11:37:22,765 INFO L131 PetriNetUnfolder]: For 54/54 co-relation queries the response was YES. [2022-11-16 11:37:22,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 659 conditions, 461 events. 0/461 cut-off events. For 54/54 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1227 event pairs, 0 based on Foata normal form. 4/465 useless extension candidates. Maximal degree in co-relation 0. Up to 19 conditions per place. [2022-11-16 11:37:22,766 INFO L137 encePairwiseOnDemand]: 430/436 looper letters, 28 selfloop transitions, 21 changer transitions 0/371 dead transitions. [2022-11-16 11:37:22,766 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 371 transitions, 996 flow [2022-11-16 11:37:22,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-16 11:37:22,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-16 11:37:22,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 7235 transitions. [2022-11-16 11:37:22,775 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7901922236784622 [2022-11-16 11:37:22,775 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 7235 transitions. [2022-11-16 11:37:22,775 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 7235 transitions. [2022-11-16 11:37:22,777 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:37:22,777 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 7235 transitions. [2022-11-16 11:37:22,786 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 344.5238095238095) internal successors, (7235), 21 states have internal predecessors, (7235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:22,796 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 436.0) internal successors, (9592), 22 states have internal predecessors, (9592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:22,798 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 436.0) internal successors, (9592), 22 states have internal predecessors, (9592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:22,799 INFO L175 Difference]: Start difference. First operand has 375 places, 347 transitions, 790 flow. Second operand 21 states and 7235 transitions. [2022-11-16 11:37:22,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 371 transitions, 996 flow [2022-11-16 11:37:22,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 371 transitions, 982 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-16 11:37:22,808 INFO L231 Difference]: Finished difference. Result has 399 places, 360 transitions, 914 flow [2022-11-16 11:37:22,809 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=784, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=914, PETRI_PLACES=399, PETRI_TRANSITIONS=360} [2022-11-16 11:37:22,810 INFO L288 CegarLoopForPetriNet]: 382 programPoint places, 17 predicate places. [2022-11-16 11:37:22,810 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 360 transitions, 914 flow [2022-11-16 11:37:22,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 344.6111111111111) internal successors, (6203), 18 states have internal predecessors, (6203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:22,812 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:37:22,813 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:37:22,821 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bad9430c-d2ef-4a70-8231-523d6bc0f5a3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-16 11:37:23,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bad9430c-d2ef-4a70-8231-523d6bc0f5a3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-11-16 11:37:23,021 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:37:23,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:37:23,021 INFO L85 PathProgramCache]: Analyzing trace with hash -390352630, now seen corresponding path program 1 times [2022-11-16 11:37:23,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:37:23,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868589507] [2022-11-16 11:37:23,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:37:23,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:37:23,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:37:23,397 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:37:23,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:37:23,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868589507] [2022-11-16 11:37:23,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868589507] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:37:23,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694043470] [2022-11-16 11:37:23,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:37:23,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:37:23,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bad9430c-d2ef-4a70-8231-523d6bc0f5a3/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:37:23,400 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bad9430c-d2ef-4a70-8231-523d6bc0f5a3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:37:23,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bad9430c-d2ef-4a70-8231-523d6bc0f5a3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-16 11:37:23,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:37:23,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 11:37:23,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:37:23,903 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:37:23,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:37:24,406 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:37:24,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694043470] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:37:24,406 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:37:24,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-16 11:37:24,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765093698] [2022-11-16 11:37:24,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:37:24,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-16 11:37:24,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:37:24,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-16 11:37:24,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-16 11:37:24,422 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 342 out of 436 [2022-11-16 11:37:24,431 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 360 transitions, 914 flow. Second operand has 34 states, 34 states have (on average 344.79411764705884) internal successors, (11723), 34 states have internal predecessors, (11723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:24,431 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:37:24,432 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 342 of 436 [2022-11-16 11:37:24,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:37:25,107 INFO L130 PetriNetUnfolder]: 0/413 cut-off events. [2022-11-16 11:37:25,108 INFO L131 PetriNetUnfolder]: For 141/141 co-relation queries the response was YES. [2022-11-16 11:37:25,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 641 conditions, 413 events. 0/413 cut-off events. For 141/141 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 925 event pairs, 0 based on Foata normal form. 4/417 useless extension candidates. Maximal degree in co-relation 0. Up to 17 conditions per place. [2022-11-16 11:37:25,109 INFO L137 encePairwiseOnDemand]: 431/436 looper letters, 33 selfloop transitions, 31 changer transitions 0/375 dead transitions. [2022-11-16 11:37:25,109 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 375 transitions, 1152 flow [2022-11-16 11:37:25,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-16 11:37:25,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-11-16 11:37:25,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 11354 transitions. [2022-11-16 11:37:25,121 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7891298304142341 [2022-11-16 11:37:25,121 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 11354 transitions. [2022-11-16 11:37:25,122 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 11354 transitions. [2022-11-16 11:37:25,124 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:37:25,124 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 11354 transitions. [2022-11-16 11:37:25,139 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 344.06060606060606) internal successors, (11354), 33 states have internal predecessors, (11354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:25,158 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 436.0) internal successors, (14824), 34 states have internal predecessors, (14824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:25,162 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 436.0) internal successors, (14824), 34 states have internal predecessors, (14824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:25,162 INFO L175 Difference]: Start difference. First operand has 399 places, 360 transitions, 914 flow. Second operand 33 states and 11354 transitions. [2022-11-16 11:37:25,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 375 transitions, 1152 flow [2022-11-16 11:37:25,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 375 transitions, 1086 flow, removed 9 selfloop flow, removed 13 redundant places. [2022-11-16 11:37:25,175 INFO L231 Difference]: Finished difference. Result has 406 places, 357 transitions, 947 flow [2022-11-16 11:37:25,176 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=831, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=947, PETRI_PLACES=406, PETRI_TRANSITIONS=357} [2022-11-16 11:37:25,176 INFO L288 CegarLoopForPetriNet]: 382 programPoint places, 24 predicate places. [2022-11-16 11:37:25,176 INFO L495 AbstractCegarLoop]: Abstraction has has 406 places, 357 transitions, 947 flow [2022-11-16 11:37:25,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 344.79411764705884) internal successors, (11723), 34 states have internal predecessors, (11723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:25,180 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:37:25,180 INFO L209 CegarLoopForPetriNet]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:37:25,195 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bad9430c-d2ef-4a70-8231-523d6bc0f5a3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-16 11:37:25,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bad9430c-d2ef-4a70-8231-523d6bc0f5a3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-11-16 11:37:25,387 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:37:25,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:37:25,387 INFO L85 PathProgramCache]: Analyzing trace with hash -1746381625, now seen corresponding path program 1 times [2022-11-16 11:37:25,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:37:25,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035319905] [2022-11-16 11:37:25,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:37:25,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:37:25,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 11:37:25,555 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-16 11:37:25,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 11:37:25,599 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-16 11:37:25,599 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-16 11:37:25,600 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-16 11:37:25,600 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-16 11:37:25,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-11-16 11:37:25,600 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-11-16 11:37:25,601 WARN L233 ceAbstractionStarter]: 10 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-16 11:37:25,601 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 11 thread instances. [2022-11-16 11:37:25,648 INFO L144 ThreadInstanceAdder]: Constructed 11 joinOtherThreadTransitions. [2022-11-16 11:37:25,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 412 places, 471 transitions, 1140 flow