./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-complex/workstealqueue_mutex-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 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_92fcd8ba-d696-43d5-8b0c-b56f4dd2b640/bin/uautomizer-vX5HgA9Q3a/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92fcd8ba-d696-43d5-8b0c-b56f4dd2b640/bin/uautomizer-vX5HgA9Q3a/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92fcd8ba-d696-43d5-8b0c-b56f4dd2b640/bin/uautomizer-vX5HgA9Q3a/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92fcd8ba-d696-43d5-8b0c-b56f4dd2b640/bin/uautomizer-vX5HgA9Q3a/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-complex/workstealqueue_mutex-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92fcd8ba-d696-43d5-8b0c-b56f4dd2b640/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92fcd8ba-d696-43d5-8b0c-b56f4dd2b640/bin/uautomizer-vX5HgA9Q3a --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 4ef1ebb9985ad6dadbe7cf99c72a7d7cbd507bc2d179a6afec5353fae325d63f --- 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-b5237d8 [2022-11-21 09:14:04,330 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-21 09:14:04,334 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-21 09:14:04,381 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-21 09:14:04,381 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-21 09:14:04,383 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-21 09:14:04,384 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-21 09:14:04,390 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-21 09:14:04,395 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-21 09:14:04,403 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-21 09:14:04,405 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-21 09:14:04,408 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-21 09:14:04,409 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-21 09:14:04,413 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-21 09:14:04,417 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-21 09:14:04,420 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-21 09:14:04,422 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-21 09:14:04,423 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-21 09:14:04,425 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-21 09:14:04,432 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-21 09:14:04,434 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-21 09:14:04,437 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-21 09:14:04,439 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-21 09:14:04,440 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-21 09:14:04,451 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-21 09:14:04,451 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-21 09:14:04,451 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-21 09:14:04,453 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-21 09:14:04,453 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-21 09:14:04,454 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-21 09:14:04,455 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-21 09:14:04,455 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-21 09:14:04,459 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-21 09:14:04,462 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-21 09:14:04,464 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-21 09:14:04,464 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-21 09:14:04,465 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-21 09:14:04,465 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-21 09:14:04,465 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-21 09:14:04,469 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-21 09:14:04,469 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-21 09:14:04,470 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92fcd8ba-d696-43d5-8b0c-b56f4dd2b640/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-21 09:14:04,509 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-21 09:14:04,509 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-21 09:14:04,510 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-21 09:14:04,510 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-21 09:14:04,511 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-21 09:14:04,511 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-21 09:14:04,512 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-21 09:14:04,512 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-21 09:14:04,512 INFO L138 SettingsManager]: * Use SBE=true [2022-11-21 09:14:04,513 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-21 09:14:04,514 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-21 09:14:04,514 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-21 09:14:04,514 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-21 09:14:04,514 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-21 09:14:04,515 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-21 09:14:04,515 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-21 09:14:04,515 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-21 09:14:04,515 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-21 09:14:04,515 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-21 09:14:04,515 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-21 09:14:04,516 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-21 09:14:04,516 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-21 09:14:04,516 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-21 09:14:04,516 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-21 09:14:04,516 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 09:14:04,517 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-21 09:14:04,517 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-21 09:14:04,517 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-21 09:14:04,518 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-21 09:14:04,518 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-21 09:14:04,518 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-21 09:14:04,518 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-21 09:14:04,519 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-21 09:14:04,519 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_92fcd8ba-d696-43d5-8b0c-b56f4dd2b640/bin/uautomizer-vX5HgA9Q3a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92fcd8ba-d696-43d5-8b0c-b56f4dd2b640/bin/uautomizer-vX5HgA9Q3a Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4ef1ebb9985ad6dadbe7cf99c72a7d7cbd507bc2d179a6afec5353fae325d63f [2022-11-21 09:14:04,773 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-21 09:14:04,796 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-21 09:14:04,799 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-21 09:14:04,800 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-21 09:14:04,801 INFO L275 PluginConnector]: CDTParser initialized [2022-11-21 09:14:04,802 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92fcd8ba-d696-43d5-8b0c-b56f4dd2b640/bin/uautomizer-vX5HgA9Q3a/../../sv-benchmarks/c/pthread-complex/workstealqueue_mutex-2.i [2022-11-21 09:14:07,899 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-21 09:14:08,356 INFO L351 CDTParser]: Found 1 translation units. [2022-11-21 09:14:08,362 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92fcd8ba-d696-43d5-8b0c-b56f4dd2b640/sv-benchmarks/c/pthread-complex/workstealqueue_mutex-2.i [2022-11-21 09:14:08,401 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92fcd8ba-d696-43d5-8b0c-b56f4dd2b640/bin/uautomizer-vX5HgA9Q3a/data/9d57e9c73/4f03789fce0c4f23bb54266e23999d27/FLAG4b7b4a484 [2022-11-21 09:14:08,419 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92fcd8ba-d696-43d5-8b0c-b56f4dd2b640/bin/uautomizer-vX5HgA9Q3a/data/9d57e9c73/4f03789fce0c4f23bb54266e23999d27 [2022-11-21 09:14:08,422 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-21 09:14:08,424 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-21 09:14:08,426 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-21 09:14:08,426 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-21 09:14:08,431 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-21 09:14:08,432 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 09:14:08" (1/1) ... [2022-11-21 09:14:08,433 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51253d8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:14:08, skipping insertion in model container [2022-11-21 09:14:08,433 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 09:14:08" (1/1) ... [2022-11-21 09:14:08,443 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-21 09:14:08,510 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-21 09:14:09,492 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92fcd8ba-d696-43d5-8b0c-b56f4dd2b640/sv-benchmarks/c/pthread-complex/workstealqueue_mutex-2.i[76469,76482] [2022-11-21 09:14:09,538 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92fcd8ba-d696-43d5-8b0c-b56f4dd2b640/sv-benchmarks/c/pthread-complex/workstealqueue_mutex-2.i[79042,79055] [2022-11-21 09:14:09,544 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92fcd8ba-d696-43d5-8b0c-b56f4dd2b640/sv-benchmarks/c/pthread-complex/workstealqueue_mutex-2.i[79451,79464] [2022-11-21 09:14:09,565 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 09:14:09,581 INFO L203 MainTranslator]: Completed pre-run [2022-11-21 09:14:09,692 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92fcd8ba-d696-43d5-8b0c-b56f4dd2b640/sv-benchmarks/c/pthread-complex/workstealqueue_mutex-2.i[76469,76482] [2022-11-21 09:14:09,732 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92fcd8ba-d696-43d5-8b0c-b56f4dd2b640/sv-benchmarks/c/pthread-complex/workstealqueue_mutex-2.i[79042,79055] [2022-11-21 09:14:09,743 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92fcd8ba-d696-43d5-8b0c-b56f4dd2b640/sv-benchmarks/c/pthread-complex/workstealqueue_mutex-2.i[79451,79464] [2022-11-21 09:14:09,785 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 09:14:10,021 INFO L208 MainTranslator]: Completed translation [2022-11-21 09:14:10,022 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:14:10 WrapperNode [2022-11-21 09:14:10,023 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-21 09:14:10,024 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-21 09:14:10,025 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-21 09:14:10,025 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-21 09:14:10,035 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:14:10" (1/1) ... [2022-11-21 09:14:10,123 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:14:10" (1/1) ... [2022-11-21 09:14:10,240 INFO L138 Inliner]: procedures = 489, calls = 127, calls flagged for inlining = 45, calls inlined = 117, statements flattened = 1719 [2022-11-21 09:14:10,242 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-21 09:14:10,243 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-21 09:14:10,243 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-21 09:14:10,244 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-21 09:14:10,258 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:14:10" (1/1) ... [2022-11-21 09:14:10,258 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:14:10" (1/1) ... [2022-11-21 09:14:10,272 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:14:10" (1/1) ... [2022-11-21 09:14:10,273 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:14:10" (1/1) ... [2022-11-21 09:14:10,325 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:14:10" (1/1) ... [2022-11-21 09:14:10,337 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:14:10" (1/1) ... [2022-11-21 09:14:10,346 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:14:10" (1/1) ... [2022-11-21 09:14:10,354 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:14:10" (1/1) ... [2022-11-21 09:14:10,369 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-21 09:14:10,370 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-21 09:14:10,376 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-21 09:14:10,376 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-21 09:14:10,388 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:14:10" (1/1) ... [2022-11-21 09:14:10,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 09:14:10,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92fcd8ba-d696-43d5-8b0c-b56f4dd2b640/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 09:14:10,447 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92fcd8ba-d696-43d5-8b0c-b56f4dd2b640/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-21 09:14:10,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92fcd8ba-d696-43d5-8b0c-b56f4dd2b640/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-21 09:14:10,506 INFO L130 BoogieDeclarations]: Found specification of procedure Stealer [2022-11-21 09:14:10,508 INFO L138 BoogieDeclarations]: Found implementation of procedure Stealer [2022-11-21 09:14:10,508 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-21 09:14:10,509 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-21 09:14:10,509 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-21 09:14:10,510 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-21 09:14:10,510 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-21 09:14:10,510 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-21 09:14:10,511 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-21 09:14:10,511 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-21 09:14:10,511 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-21 09:14:10,511 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-21 09:14:10,511 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-21 09:14:10,512 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-21 09:14:10,512 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-21 09:14:10,515 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-21 09:14:11,047 INFO L235 CfgBuilder]: Building ICFG [2022-11-21 09:14:11,050 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-21 09:14:13,712 INFO L276 CfgBuilder]: Performing block encoding [2022-11-21 09:14:14,273 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-21 09:14:14,276 INFO L300 CfgBuilder]: Removed 11 assume(true) statements. [2022-11-21 09:14:14,281 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 09:14:14 BoogieIcfgContainer [2022-11-21 09:14:14,283 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-21 09:14:14,287 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-21 09:14:14,288 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-21 09:14:14,292 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-21 09:14:14,293 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 09:14:08" (1/3) ... [2022-11-21 09:14:14,295 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5083a2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 09:14:14, skipping insertion in model container [2022-11-21 09:14:14,296 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:14:10" (2/3) ... [2022-11-21 09:14:14,297 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5083a2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 09:14:14, skipping insertion in model container [2022-11-21 09:14:14,298 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 09:14:14" (3/3) ... [2022-11-21 09:14:14,299 INFO L112 eAbstractionObserver]: Analyzing ICFG workstealqueue_mutex-2.i [2022-11-21 09:14:14,313 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-21 09:14:14,327 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-21 09:14:14,327 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2022-11-21 09:14:14,327 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-21 09:14:14,548 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-11-21 09:14:14,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1625 places, 1670 transitions, 3348 flow [2022-11-21 09:14:16,490 INFO L130 PetriNetUnfolder]: 89/3097 cut-off events. [2022-11-21 09:14:16,491 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-21 09:14:16,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3103 conditions, 3097 events. 89/3097 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 14322 event pairs, 0 based on Foata normal form. 0/2995 useless extension candidates. Maximal degree in co-relation 1580. Up to 6 conditions per place. [2022-11-21 09:14:16,548 INFO L82 GeneralOperation]: Start removeDead. Operand has 1625 places, 1670 transitions, 3348 flow [2022-11-21 09:14:16,580 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1625 places, 1670 transitions, 3348 flow [2022-11-21 09:14:16,601 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-21 09:14:16,613 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;@2415cecc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-21 09:14:16,614 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-11-21 09:14:16,641 INFO L130 PetriNetUnfolder]: 11/179 cut-off events. [2022-11-21 09:14:16,641 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-21 09:14:16,642 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 09:14:16,643 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:14:16,645 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-21 09:14:16,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:14:16,654 INFO L85 PathProgramCache]: Analyzing trace with hash -348910945, now seen corresponding path program 1 times [2022-11-21 09:14:16,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:14:16,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734277953] [2022-11-21 09:14:16,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:14:16,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:14:17,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:14:17,277 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-21 09:14:17,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:14:17,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734277953] [2022-11-21 09:14:17,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734277953] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 09:14:17,280 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 09:14:17,280 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-21 09:14:17,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181512428] [2022-11-21 09:14:17,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 09:14:17,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-21 09:14:17,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:14:17,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-21 09:14:17,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-21 09:14:17,347 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1597 out of 1670 [2022-11-21 09:14:17,359 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1625 places, 1670 transitions, 3348 flow. Second operand has 2 states, 2 states have (on average 1599.0) internal successors, (3198), 2 states have internal predecessors, (3198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:14:17,359 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 09:14:17,359 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1597 of 1670 [2022-11-21 09:14:17,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 09:14:21,247 INFO L130 PetriNetUnfolder]: 360/9225 cut-off events. [2022-11-21 09:14:21,247 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-21 09:14:21,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9699 conditions, 9225 events. 360/9225 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 78634 event pairs, 176 based on Foata normal form. 161/9161 useless extension candidates. Maximal degree in co-relation 8147. Up to 468 conditions per place. [2022-11-21 09:14:21,344 INFO L137 encePairwiseOnDemand]: 1654/1670 looper letters, 52 selfloop transitions, 0 changer transitions 0/1649 dead transitions. [2022-11-21 09:14:21,344 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1621 places, 1649 transitions, 3410 flow [2022-11-21 09:14:21,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-21 09:14:21,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-21 09:14:21,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 3262 transitions. [2022-11-21 09:14:21,371 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9766467065868264 [2022-11-21 09:14:21,372 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 3262 transitions. [2022-11-21 09:14:21,373 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 3262 transitions. [2022-11-21 09:14:21,380 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 09:14:21,384 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 3262 transitions. [2022-11-21 09:14:21,400 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 1631.0) internal successors, (3262), 2 states have internal predecessors, (3262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:14:21,418 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 1670.0) internal successors, (5010), 3 states have internal predecessors, (5010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:14:21,422 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 1670.0) internal successors, (5010), 3 states have internal predecessors, (5010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:14:21,425 INFO L175 Difference]: Start difference. First operand has 1625 places, 1670 transitions, 3348 flow. Second operand 2 states and 3262 transitions. [2022-11-21 09:14:21,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1621 places, 1649 transitions, 3410 flow [2022-11-21 09:14:21,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1621 places, 1649 transitions, 3410 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-21 09:14:21,478 INFO L231 Difference]: Finished difference. Result has 1621 places, 1649 transitions, 3306 flow [2022-11-21 09:14:21,484 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1670, PETRI_DIFFERENCE_MINUEND_FLOW=3306, PETRI_DIFFERENCE_MINUEND_PLACES=1620, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1649, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1649, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=3306, PETRI_PLACES=1621, PETRI_TRANSITIONS=1649} [2022-11-21 09:14:21,488 INFO L288 CegarLoopForPetriNet]: 1625 programPoint places, -4 predicate places. [2022-11-21 09:14:21,489 INFO L495 AbstractCegarLoop]: Abstraction has has 1621 places, 1649 transitions, 3306 flow [2022-11-21 09:14:21,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 1599.0) internal successors, (3198), 2 states have internal predecessors, (3198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:14:21,492 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 09:14:21,492 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:14:21,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-21 09:14:21,493 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-21 09:14:21,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:14:21,494 INFO L85 PathProgramCache]: Analyzing trace with hash 1004398752, now seen corresponding path program 1 times [2022-11-21 09:14:21,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:14:21,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403799116] [2022-11-21 09:14:21,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:14:21,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:14:21,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:14:21,768 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-21 09:14:21,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:14:21,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403799116] [2022-11-21 09:14:21,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403799116] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 09:14:21,769 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 09:14:21,770 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 09:14:21,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344041463] [2022-11-21 09:14:21,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 09:14:21,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 09:14:21,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:14:21,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 09:14:21,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 09:14:21,780 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1559 out of 1670 [2022-11-21 09:14:21,790 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1621 places, 1649 transitions, 3306 flow. Second operand has 3 states, 3 states have (on average 1563.0) internal successors, (4689), 3 states have internal predecessors, (4689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:14:21,790 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 09:14:21,790 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1559 of 1670 [2022-11-21 09:14:21,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 09:14:29,050 INFO L130 PetriNetUnfolder]: 829/14879 cut-off events. [2022-11-21 09:14:29,051 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-21 09:14:29,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16080 conditions, 14879 events. 829/14879 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 131876 event pairs, 232 based on Foata normal form. 0/14535 useless extension candidates. Maximal degree in co-relation 16076. Up to 611 conditions per place. [2022-11-21 09:14:29,165 INFO L137 encePairwiseOnDemand]: 1652/1670 looper letters, 143 selfloop transitions, 12 changer transitions 9/1717 dead transitions. [2022-11-21 09:14:29,165 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1623 places, 1717 transitions, 3758 flow [2022-11-21 09:14:29,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 09:14:29,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-21 09:14:29,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 4841 transitions. [2022-11-21 09:14:29,176 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9662674650698603 [2022-11-21 09:14:29,177 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 4841 transitions. [2022-11-21 09:14:29,177 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 4841 transitions. [2022-11-21 09:14:29,180 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 09:14:29,181 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 4841 transitions. [2022-11-21 09:14:29,194 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 1613.6666666666667) internal successors, (4841), 3 states have internal predecessors, (4841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:14:29,207 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1670.0) internal successors, (6680), 4 states have internal predecessors, (6680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:14:29,212 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1670.0) internal successors, (6680), 4 states have internal predecessors, (6680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:14:29,212 INFO L175 Difference]: Start difference. First operand has 1621 places, 1649 transitions, 3306 flow. Second operand 3 states and 4841 transitions. [2022-11-21 09:14:29,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1623 places, 1717 transitions, 3758 flow [2022-11-21 09:14:29,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1623 places, 1717 transitions, 3758 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-21 09:14:29,439 INFO L231 Difference]: Finished difference. Result has 1624 places, 1646 transitions, 3354 flow [2022-11-21 09:14:29,442 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1670, PETRI_DIFFERENCE_MINUEND_FLOW=3306, PETRI_DIFFERENCE_MINUEND_PLACES=1621, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1649, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1637, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=3354, PETRI_PLACES=1624, PETRI_TRANSITIONS=1646} [2022-11-21 09:14:29,443 INFO L288 CegarLoopForPetriNet]: 1625 programPoint places, -1 predicate places. [2022-11-21 09:14:29,443 INFO L495 AbstractCegarLoop]: Abstraction has has 1624 places, 1646 transitions, 3354 flow [2022-11-21 09:14:29,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1563.0) internal successors, (4689), 3 states have internal predecessors, (4689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:14:29,449 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 09:14:29,450 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:14:29,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-21 09:14:29,451 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-21 09:14:29,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:14:29,451 INFO L85 PathProgramCache]: Analyzing trace with hash -611934805, now seen corresponding path program 1 times [2022-11-21 09:14:29,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:14:29,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284458122] [2022-11-21 09:14:29,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:14:29,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:14:29,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:14:29,805 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-21 09:14:29,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:14:29,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284458122] [2022-11-21 09:14:29,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284458122] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 09:14:29,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108066664] [2022-11-21 09:14:29,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:14:29,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:14:29,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92fcd8ba-d696-43d5-8b0c-b56f4dd2b640/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 09:14:29,811 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92fcd8ba-d696-43d5-8b0c-b56f4dd2b640/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 09:14:29,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92fcd8ba-d696-43d5-8b0c-b56f4dd2b640/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-21 09:14:30,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:14:30,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-21 09:14:30,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:14:30,143 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-21 09:14:30,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 09:14:30,211 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-21 09:14:30,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108066664] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 09:14:30,212 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 09:14:30,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-21 09:14:30,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403803420] [2022-11-21 09:14:30,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 09:14:30,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-21 09:14:30,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:14:30,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-21 09:14:30,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-21 09:14:30,234 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1558 out of 1670 [2022-11-21 09:14:30,260 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1624 places, 1646 transitions, 3354 flow. Second operand has 10 states, 10 states have (on average 1560.9) internal successors, (15609), 10 states have internal predecessors, (15609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:14:30,260 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 09:14:30,260 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1558 of 1670 [2022-11-21 09:14:30,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 09:14:38,305 INFO L130 PetriNetUnfolder]: 829/14839 cut-off events. [2022-11-21 09:14:38,305 INFO L131 PetriNetUnfolder]: For 21/21 co-relation queries the response was YES. [2022-11-21 09:14:38,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16133 conditions, 14839 events. 829/14839 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 131531 event pairs, 174 based on Foata normal form. 2/14521 useless extension candidates. Maximal degree in co-relation 16127. Up to 577 conditions per place. [2022-11-21 09:14:38,419 INFO L137 encePairwiseOnDemand]: 1649/1670 looper letters, 141 selfloop transitions, 26 changer transitions 2/1721 dead transitions. [2022-11-21 09:14:38,419 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1625 places, 1721 transitions, 3844 flow [2022-11-21 09:14:38,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-21 09:14:38,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-21 09:14:38,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 14193 transitions. [2022-11-21 09:14:38,457 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.944311377245509 [2022-11-21 09:14:38,457 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 14193 transitions. [2022-11-21 09:14:38,458 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 14193 transitions. [2022-11-21 09:14:38,470 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 09:14:38,470 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 14193 transitions. [2022-11-21 09:14:38,505 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 1577.0) internal successors, (14193), 9 states have internal predecessors, (14193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:14:38,538 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 1670.0) internal successors, (16700), 10 states have internal predecessors, (16700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:14:38,545 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 1670.0) internal successors, (16700), 10 states have internal predecessors, (16700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:14:38,546 INFO L175 Difference]: Start difference. First operand has 1624 places, 1646 transitions, 3354 flow. Second operand 9 states and 14193 transitions. [2022-11-21 09:14:38,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1625 places, 1721 transitions, 3844 flow [2022-11-21 09:14:38,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1624 places, 1721 transitions, 3832 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-21 09:14:38,581 INFO L231 Difference]: Finished difference. Result has 1627 places, 1656 transitions, 3468 flow [2022-11-21 09:14:38,585 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1670, PETRI_DIFFERENCE_MINUEND_FLOW=3342, PETRI_DIFFERENCE_MINUEND_PLACES=1616, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1646, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1623, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3468, PETRI_PLACES=1627, PETRI_TRANSITIONS=1656} [2022-11-21 09:14:38,587 INFO L288 CegarLoopForPetriNet]: 1625 programPoint places, 2 predicate places. [2022-11-21 09:14:38,587 INFO L495 AbstractCegarLoop]: Abstraction has has 1627 places, 1656 transitions, 3468 flow [2022-11-21 09:14:38,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1560.9) internal successors, (15609), 10 states have internal predecessors, (15609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:14:38,593 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 09:14:38,593 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:14:38,609 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92fcd8ba-d696-43d5-8b0c-b56f4dd2b640/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-21 09:14:38,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92fcd8ba-d696-43d5-8b0c-b56f4dd2b640/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:14:38,803 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-21 09:14:38,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:14:38,803 INFO L85 PathProgramCache]: Analyzing trace with hash 221479553, now seen corresponding path program 2 times [2022-11-21 09:14:38,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:14:38,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831052774] [2022-11-21 09:14:38,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:14:38,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:14:38,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:14:39,373 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-21 09:14:39,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:14:39,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831052774] [2022-11-21 09:14:39,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831052774] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 09:14:39,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577962043] [2022-11-21 09:14:39,375 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 09:14:39,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:14:39,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92fcd8ba-d696-43d5-8b0c-b56f4dd2b640/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 09:14:39,380 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92fcd8ba-d696-43d5-8b0c-b56f4dd2b640/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 09:14:39,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92fcd8ba-d696-43d5-8b0c-b56f4dd2b640/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-21 09:14:39,804 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 09:14:39,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 09:14:39,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-21 09:14:39,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:14:39,943 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-21 09:14:39,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 09:14:40,087 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-21 09:14:40,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577962043] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 09:14:40,088 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 09:14:40,088 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 11 [2022-11-21 09:14:40,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619935812] [2022-11-21 09:14:40,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 09:14:40,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-21 09:14:40,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:14:40,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-21 09:14:40,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-11-21 09:14:40,116 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1558 out of 1670 [2022-11-21 09:14:40,137 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1627 places, 1656 transitions, 3468 flow. Second operand has 11 states, 11 states have (on average 1560.909090909091) internal successors, (17170), 11 states have internal predecessors, (17170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:14:40,137 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 09:14:40,137 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1558 of 1670 [2022-11-21 09:14:40,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 09:14:46,819 INFO L130 PetriNetUnfolder]: 829/14892 cut-off events. [2022-11-21 09:14:46,820 INFO L131 PetriNetUnfolder]: For 168/168 co-relation queries the response was YES. [2022-11-21 09:14:46,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16322 conditions, 14892 events. 829/14892 cut-off events. For 168/168 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 131743 event pairs, 174 based on Foata normal form. 1/14572 useless extension candidates. Maximal degree in co-relation 16314. Up to 577 conditions per place. [2022-11-21 09:14:46,920 INFO L137 encePairwiseOnDemand]: 1650/1670 looper letters, 143 selfloop transitions, 29 changer transitions 0/1724 dead transitions. [2022-11-21 09:14:46,920 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1638 places, 1724 transitions, 3966 flow [2022-11-21 09:14:46,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-21 09:14:46,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-21 09:14:46,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 18869 transitions. [2022-11-21 09:14:46,963 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9415668662674651 [2022-11-21 09:14:46,964 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 18869 transitions. [2022-11-21 09:14:46,964 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 18869 transitions. [2022-11-21 09:14:46,975 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 09:14:46,976 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 18869 transitions. [2022-11-21 09:14:47,023 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 1572.4166666666667) internal successors, (18869), 12 states have internal predecessors, (18869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:14:47,061 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 1670.0) internal successors, (21710), 13 states have internal predecessors, (21710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:14:47,069 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 1670.0) internal successors, (21710), 13 states have internal predecessors, (21710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:14:47,070 INFO L175 Difference]: Start difference. First operand has 1627 places, 1656 transitions, 3468 flow. Second operand 12 states and 18869 transitions. [2022-11-21 09:14:47,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1638 places, 1724 transitions, 3966 flow [2022-11-21 09:14:47,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1637 places, 1724 transitions, 3942 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-21 09:14:47,115 INFO L231 Difference]: Finished difference. Result has 1641 places, 1660 transitions, 3561 flow [2022-11-21 09:14:47,118 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1670, PETRI_DIFFERENCE_MINUEND_FLOW=3446, PETRI_DIFFERENCE_MINUEND_PLACES=1626, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1656, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1628, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3561, PETRI_PLACES=1641, PETRI_TRANSITIONS=1660} [2022-11-21 09:14:47,119 INFO L288 CegarLoopForPetriNet]: 1625 programPoint places, 16 predicate places. [2022-11-21 09:14:47,119 INFO L495 AbstractCegarLoop]: Abstraction has has 1641 places, 1660 transitions, 3561 flow [2022-11-21 09:14:47,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1560.909090909091) internal successors, (17170), 11 states have internal predecessors, (17170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:14:47,125 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 09:14:47,125 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:14:47,141 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92fcd8ba-d696-43d5-8b0c-b56f4dd2b640/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-21 09:14:47,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92fcd8ba-d696-43d5-8b0c-b56f4dd2b640/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:14:47,333 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-21 09:14:47,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:14:47,333 INFO L85 PathProgramCache]: Analyzing trace with hash 1383207500, now seen corresponding path program 3 times [2022-11-21 09:14:47,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:14:47,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815999571] [2022-11-21 09:14:47,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:14:47,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:14:47,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-21 09:14:47,424 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-21 09:14:47,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-21 09:14:47,554 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-21 09:14:47,554 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-21 09:14:47,561 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2022-11-21 09:14:47,563 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2022-11-21 09:14:47,563 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2022-11-21 09:14:47,564 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2022-11-21 09:14:47,564 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2022-11-21 09:14:47,565 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2022-11-21 09:14:47,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-21 09:14:47,565 INFO L444 BasicCegarLoop]: Path program histogram: [3, 1, 1] [2022-11-21 09:14:47,568 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-21 09:14:47,569 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-21 09:14:47,771 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-21 09:14:47,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1772 places, 1820 transitions, 3658 flow [2022-11-21 09:14:49,898 INFO L130 PetriNetUnfolder]: 140/4719 cut-off events. [2022-11-21 09:14:49,898 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-11-21 09:14:49,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4733 conditions, 4719 events. 140/4719 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 27276 event pairs, 0 based on Foata normal form. 0/4559 useless extension candidates. Maximal degree in co-relation 3099. Up to 9 conditions per place. [2022-11-21 09:14:49,958 INFO L82 GeneralOperation]: Start removeDead. Operand has 1772 places, 1820 transitions, 3658 flow [2022-11-21 09:14:49,976 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1772 places, 1820 transitions, 3658 flow [2022-11-21 09:14:49,977 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-21 09:14:49,978 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;@2415cecc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-21 09:14:49,979 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-11-21 09:14:49,993 INFO L130 PetriNetUnfolder]: 12/192 cut-off events. [2022-11-21 09:14:49,994 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-21 09:14:49,994 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 09:14:49,994 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:14:49,994 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-21 09:14:49,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:14:49,995 INFO L85 PathProgramCache]: Analyzing trace with hash -60647274, now seen corresponding path program 1 times [2022-11-21 09:14:49,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:14:49,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130339072] [2022-11-21 09:14:49,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:14:49,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:14:50,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:14:50,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:14:50,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:14:50,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130339072] [2022-11-21 09:14:50,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130339072] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 09:14:50,061 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 09:14:50,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-21 09:14:50,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282221564] [2022-11-21 09:14:50,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 09:14:50,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-21 09:14:50,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:14:50,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-21 09:14:50,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-21 09:14:50,071 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1740 out of 1820 [2022-11-21 09:14:50,075 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1772 places, 1820 transitions, 3658 flow. Second operand has 2 states, 2 states have (on average 1743.5) internal successors, (3487), 2 states have internal predecessors, (3487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:14:50,075 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 09:14:50,075 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1740 of 1820 [2022-11-21 09:14:50,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 09:15:07,909 INFO L130 PetriNetUnfolder]: 2938/48967 cut-off events. [2022-11-21 09:15:07,910 INFO L131 PetriNetUnfolder]: For 73/77 co-relation queries the response was YES. [2022-11-21 09:15:08,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52504 conditions, 48967 events. 2938/48967 cut-off events. For 73/77 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 635216 event pairs, 1964 based on Foata normal form. 1133/48903 useless extension candidates. Maximal degree in co-relation 9619. Up to 3491 conditions per place. [2022-11-21 09:15:08,774 INFO L137 encePairwiseOnDemand]: 1803/1820 looper letters, 58 selfloop transitions, 0 changer transitions 0/1798 dead transitions. [2022-11-21 09:15:08,774 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1768 places, 1798 transitions, 3730 flow [2022-11-21 09:15:08,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-21 09:15:08,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-21 09:15:08,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 3555 transitions. [2022-11-21 09:15:08,784 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9766483516483516 [2022-11-21 09:15:08,784 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 3555 transitions. [2022-11-21 09:15:08,784 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 3555 transitions. [2022-11-21 09:15:08,786 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 09:15:08,786 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 3555 transitions. [2022-11-21 09:15:08,794 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 1777.5) internal successors, (3555), 2 states have internal predecessors, (3555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:15:08,802 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 1820.0) internal successors, (5460), 3 states have internal predecessors, (5460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:15:08,806 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 1820.0) internal successors, (5460), 3 states have internal predecessors, (5460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:15:08,806 INFO L175 Difference]: Start difference. First operand has 1772 places, 1820 transitions, 3658 flow. Second operand 2 states and 3555 transitions. [2022-11-21 09:15:08,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1768 places, 1798 transitions, 3730 flow [2022-11-21 09:15:08,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1768 places, 1798 transitions, 3730 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-21 09:15:08,845 INFO L231 Difference]: Finished difference. Result has 1768 places, 1798 transitions, 3614 flow [2022-11-21 09:15:08,849 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1820, PETRI_DIFFERENCE_MINUEND_FLOW=3614, PETRI_DIFFERENCE_MINUEND_PLACES=1767, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1798, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1798, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=3614, PETRI_PLACES=1768, PETRI_TRANSITIONS=1798} [2022-11-21 09:15:08,850 INFO L288 CegarLoopForPetriNet]: 1772 programPoint places, -4 predicate places. [2022-11-21 09:15:08,851 INFO L495 AbstractCegarLoop]: Abstraction has has 1768 places, 1798 transitions, 3614 flow [2022-11-21 09:15:08,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 1743.5) internal successors, (3487), 2 states have internal predecessors, (3487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:15:08,853 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 09:15:08,853 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:15:08,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-21 09:15:08,854 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-21 09:15:08,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:15:08,855 INFO L85 PathProgramCache]: Analyzing trace with hash -134612005, now seen corresponding path program 1 times [2022-11-21 09:15:08,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:15:08,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565071032] [2022-11-21 09:15:08,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:15:08,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:15:08,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:15:08,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:15:08,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:15:08,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565071032] [2022-11-21 09:15:08,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565071032] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 09:15:08,973 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 09:15:08,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 09:15:08,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234614179] [2022-11-21 09:15:08,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 09:15:08,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 09:15:08,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:15:08,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 09:15:08,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 09:15:08,980 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1702 out of 1820 [2022-11-21 09:15:08,987 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1768 places, 1798 transitions, 3614 flow. Second operand has 3 states, 3 states have (on average 1707.6666666666667) internal successors, (5123), 3 states have internal predecessors, (5123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:15:08,987 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 09:15:08,987 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1702 of 1820 [2022-11-21 09:15:08,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand