./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-complex/safestack_relacy.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15005804-f7ff-499c-a226-b70d74029075/bin/uautomizer-QkZJyEgLgS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15005804-f7ff-499c-a226-b70d74029075/bin/uautomizer-QkZJyEgLgS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15005804-f7ff-499c-a226-b70d74029075/bin/uautomizer-QkZJyEgLgS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15005804-f7ff-499c-a226-b70d74029075/bin/uautomizer-QkZJyEgLgS/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-complex/safestack_relacy.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15005804-f7ff-499c-a226-b70d74029075/bin/uautomizer-QkZJyEgLgS/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15005804-f7ff-499c-a226-b70d74029075/bin/uautomizer-QkZJyEgLgS --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1d61eb304445c3cb39dfadfa4748d680ea5f0f4958f8bc176e8bc3c77c47e674 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-4e7fbc6 [2022-11-23 01:42:58,430 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 01:42:58,432 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 01:42:58,455 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 01:42:58,455 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 01:42:58,456 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 01:42:58,458 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 01:42:58,462 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 01:42:58,467 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 01:42:58,473 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 01:42:58,475 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 01:42:58,478 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 01:42:58,478 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 01:42:58,483 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 01:42:58,486 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 01:42:58,487 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 01:42:58,488 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 01:42:58,489 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 01:42:58,490 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 01:42:58,492 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 01:42:58,493 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 01:42:58,494 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 01:42:58,495 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 01:42:58,496 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 01:42:58,499 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 01:42:58,500 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 01:42:58,500 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 01:42:58,501 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 01:42:58,502 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 01:42:58,503 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 01:42:58,503 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 01:42:58,504 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 01:42:58,505 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 01:42:58,506 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 01:42:58,507 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 01:42:58,510 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 01:42:58,511 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 01:42:58,511 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 01:42:58,512 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 01:42:58,514 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 01:42:58,516 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 01:42:58,517 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15005804-f7ff-499c-a226-b70d74029075/bin/uautomizer-QkZJyEgLgS/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-23 01:42:58,547 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 01:42:58,547 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 01:42:58,548 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 01:42:58,548 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 01:42:58,549 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 01:42:58,549 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 01:42:58,550 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-23 01:42:58,550 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-23 01:42:58,550 INFO L138 SettingsManager]: * Use SBE=true [2022-11-23 01:42:58,550 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 01:42:58,551 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 01:42:58,552 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 01:42:58,552 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 01:42:58,552 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 01:42:58,552 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 01:42:58,552 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 01:42:58,553 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 01:42:58,553 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 01:42:58,553 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 01:42:58,553 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 01:42:58,553 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 01:42:58,554 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 01:42:58,554 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-23 01:42:58,554 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 01:42:58,554 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 01:42:58,555 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 01:42:58,555 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 01:42:58,555 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 01:42:58,556 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-23 01:42:58,556 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 01:42:58,556 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-23 01:42:58,556 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 01:42:58,557 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-23 01:42:58,557 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-23 01:42:58,557 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15005804-f7ff-499c-a226-b70d74029075/bin/uautomizer-QkZJyEgLgS/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15005804-f7ff-499c-a226-b70d74029075/bin/uautomizer-QkZJyEgLgS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1d61eb304445c3cb39dfadfa4748d680ea5f0f4958f8bc176e8bc3c77c47e674 [2022-11-23 01:42:58,838 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 01:42:58,873 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 01:42:58,876 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 01:42:58,878 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 01:42:58,878 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 01:42:58,879 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15005804-f7ff-499c-a226-b70d74029075/bin/uautomizer-QkZJyEgLgS/../../sv-benchmarks/c/pthread-complex/safestack_relacy.i [2022-11-23 01:43:02,008 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 01:43:02,452 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 01:43:02,452 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15005804-f7ff-499c-a226-b70d74029075/sv-benchmarks/c/pthread-complex/safestack_relacy.i [2022-11-23 01:43:02,472 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15005804-f7ff-499c-a226-b70d74029075/bin/uautomizer-QkZJyEgLgS/data/495782007/e9b3459602d94d9ab1fdf483059a0d60/FLAGe0d4bb8d5 [2022-11-23 01:43:02,623 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15005804-f7ff-499c-a226-b70d74029075/bin/uautomizer-QkZJyEgLgS/data/495782007/e9b3459602d94d9ab1fdf483059a0d60 [2022-11-23 01:43:02,625 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 01:43:02,627 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 01:43:02,628 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 01:43:02,628 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 01:43:02,633 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 01:43:02,634 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:43:02" (1/1) ... [2022-11-23 01:43:02,638 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3450bbfb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:43:02, skipping insertion in model container [2022-11-23 01:43:02,638 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:43:02" (1/1) ... [2022-11-23 01:43:02,644 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 01:43:02,716 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 01:43:03,741 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_15005804-f7ff-499c-a226-b70d74029075/sv-benchmarks/c/pthread-complex/safestack_relacy.i[78860,78873] [2022-11-23 01:43:03,758 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 01:43:03,771 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 01:43:03,868 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_15005804-f7ff-499c-a226-b70d74029075/sv-benchmarks/c/pthread-complex/safestack_relacy.i[78860,78873] [2022-11-23 01:43:03,880 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 01:43:04,007 INFO L208 MainTranslator]: Completed translation [2022-11-23 01:43:04,007 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:43:04 WrapperNode [2022-11-23 01:43:04,008 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 01:43:04,009 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 01:43:04,009 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 01:43:04,009 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 01:43:04,016 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:43:04" (1/1) ... [2022-11-23 01:43:04,052 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:43:04" (1/1) ... [2022-11-23 01:43:04,101 INFO L138 Inliner]: procedures = 481, calls = 74, calls flagged for inlining = 19, calls inlined = 19, statements flattened = 283 [2022-11-23 01:43:04,102 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 01:43:04,102 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 01:43:04,102 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 01:43:04,102 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 01:43:04,115 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:43:04" (1/1) ... [2022-11-23 01:43:04,116 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:43:04" (1/1) ... [2022-11-23 01:43:04,122 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:43:04" (1/1) ... [2022-11-23 01:43:04,131 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:43:04" (1/1) ... [2022-11-23 01:43:04,147 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:43:04" (1/1) ... [2022-11-23 01:43:04,164 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:43:04" (1/1) ... [2022-11-23 01:43:04,168 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:43:04" (1/1) ... [2022-11-23 01:43:04,171 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:43:04" (1/1) ... [2022-11-23 01:43:04,180 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 01:43:04,181 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 01:43:04,181 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 01:43:04,181 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 01:43:04,182 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:43:04" (1/1) ... [2022-11-23 01:43:04,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 01:43:04,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15005804-f7ff-499c-a226-b70d74029075/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 01:43:04,210 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15005804-f7ff-499c-a226-b70d74029075/bin/uautomizer-QkZJyEgLgS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 01:43:04,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15005804-f7ff-499c-a226-b70d74029075/bin/uautomizer-QkZJyEgLgS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 01:43:04,254 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-23 01:43:04,255 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 01:43:04,255 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-23 01:43:04,255 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-23 01:43:04,256 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 01:43:04,256 INFO L130 BoogieDeclarations]: Found specification of procedure thread [2022-11-23 01:43:04,260 INFO L138 BoogieDeclarations]: Found implementation of procedure thread [2022-11-23 01:43:04,260 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 01:43:04,260 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 01:43:04,261 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 01:43:04,261 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-23 01:43:04,261 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 01:43:04,263 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-23 01:43:04,672 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 01:43:04,674 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 01:43:05,071 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 01:43:05,181 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 01:43:05,181 INFO L300 CfgBuilder]: Removed 7 assume(true) statements. [2022-11-23 01:43:05,184 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:43:05 BoogieIcfgContainer [2022-11-23 01:43:05,184 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 01:43:05,186 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 01:43:05,186 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 01:43:05,190 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 01:43:05,190 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 01:43:02" (1/3) ... [2022-11-23 01:43:05,191 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@128d3dc7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:43:05, skipping insertion in model container [2022-11-23 01:43:05,191 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:43:04" (2/3) ... [2022-11-23 01:43:05,191 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@128d3dc7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:43:05, skipping insertion in model container [2022-11-23 01:43:05,191 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:43:05" (3/3) ... [2022-11-23 01:43:05,193 INFO L112 eAbstractionObserver]: Analyzing ICFG safestack_relacy.i [2022-11-23 01:43:05,203 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-23 01:43:05,214 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 01:43:05,214 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 01:43:05,215 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-23 01:43:05,363 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-11-23 01:43:05,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 269 places, 283 transitions, 574 flow [2022-11-23 01:43:05,518 INFO L130 PetriNetUnfolder]: 19/298 cut-off events. [2022-11-23 01:43:05,519 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-23 01:43:05,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 304 conditions, 298 events. 19/298 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 454 event pairs, 0 based on Foata normal form. 0/275 useless extension candidates. Maximal degree in co-relation 206. Up to 4 conditions per place. [2022-11-23 01:43:05,527 INFO L82 GeneralOperation]: Start removeDead. Operand has 269 places, 283 transitions, 574 flow [2022-11-23 01:43:05,534 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 265 places, 278 transitions, 561 flow [2022-11-23 01:43:05,538 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-23 01:43:05,553 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 265 places, 278 transitions, 561 flow [2022-11-23 01:43:05,555 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 265 places, 278 transitions, 561 flow [2022-11-23 01:43:05,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 265 places, 278 transitions, 561 flow [2022-11-23 01:43:05,616 INFO L130 PetriNetUnfolder]: 18/293 cut-off events. [2022-11-23 01:43:05,616 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-23 01:43:05,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 298 conditions, 293 events. 18/293 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 410 event pairs, 0 based on Foata normal form. 0/270 useless extension candidates. Maximal degree in co-relation 206. Up to 4 conditions per place. [2022-11-23 01:43:05,623 INFO L119 LiptonReduction]: Number of co-enabled transitions 7812 [2022-11-23 01:43:16,570 INFO L134 LiptonReduction]: Checked pairs total: 7647 [2022-11-23 01:43:16,571 INFO L136 LiptonReduction]: Total number of compositions: 278 [2022-11-23 01:43:16,587 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 01:43:16,593 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@4dfa1e15, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 01:43:16,594 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-23 01:43:16,598 INFO L130 PetriNetUnfolder]: 1/16 cut-off events. [2022-11-23 01:43:16,599 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-23 01:43:16,599 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 01:43:16,600 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2022-11-23 01:43:16,600 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 01:43:16,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 01:43:16,605 INFO L85 PathProgramCache]: Analyzing trace with hash 1416930049, now seen corresponding path program 1 times [2022-11-23 01:43:16,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 01:43:16,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829620990] [2022-11-23 01:43:16,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:43:16,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 01:43:16,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:43:17,184 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 01:43:17,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 01:43:17,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829620990] [2022-11-23 01:43:17,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829620990] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 01:43:17,187 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 01:43:17,187 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 01:43:17,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075559913] [2022-11-23 01:43:17,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 01:43:17,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 01:43:17,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 01:43:17,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 01:43:17,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 01:43:17,277 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 260 out of 561 [2022-11-23 01:43:17,284 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 36 transitions, 77 flow. Second operand has 3 states, 3 states have (on average 261.6666666666667) internal successors, (785), 3 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) [2022-11-23 01:43:17,284 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 01:43:17,284 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 260 of 561 [2022-11-23 01:43:17,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 01:43:17,428 INFO L130 PetriNetUnfolder]: 82/169 cut-off events. [2022-11-23 01:43:17,428 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-23 01:43:17,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 343 conditions, 169 events. 82/169 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 470 event pairs, 57 based on Foata normal form. 0/119 useless extension candidates. Maximal degree in co-relation 320. Up to 167 conditions per place. [2022-11-23 01:43:17,431 INFO L137 encePairwiseOnDemand]: 555/561 looper letters, 31 selfloop transitions, 2 changer transitions 0/34 dead transitions. [2022-11-23 01:43:17,431 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 34 transitions, 139 flow [2022-11-23 01:43:17,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 01:43:17,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 01:43:17,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 817 transitions. [2022-11-23 01:43:17,454 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48544266191325014 [2022-11-23 01:43:17,455 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 817 transitions. [2022-11-23 01:43:17,456 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 817 transitions. [2022-11-23 01:43:17,459 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 01:43:17,461 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 817 transitions. [2022-11-23 01:43:17,467 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 272.3333333333333) internal successors, (817), 3 states have internal predecessors, (817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:43:17,477 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 561.0) internal successors, (2244), 4 states have internal predecessors, (2244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:43:17,479 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 561.0) internal successors, (2244), 4 states have internal predecessors, (2244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:43:17,481 INFO L175 Difference]: Start difference. First operand has 30 places, 36 transitions, 77 flow. Second operand 3 states and 817 transitions. [2022-11-23 01:43:17,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 34 transitions, 139 flow [2022-11-23 01:43:17,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 34 transitions, 139 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-23 01:43:17,487 INFO L231 Difference]: Finished difference. Result has 32 places, 34 transitions, 83 flow [2022-11-23 01:43:17,489 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=561, PETRI_DIFFERENCE_MINUEND_FLOW=71, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=83, PETRI_PLACES=32, PETRI_TRANSITIONS=34} [2022-11-23 01:43:17,493 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 2 predicate places. [2022-11-23 01:43:17,493 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 34 transitions, 83 flow [2022-11-23 01:43:17,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 261.6666666666667) internal successors, (785), 3 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) [2022-11-23 01:43:17,494 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 01:43:17,494 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2022-11-23 01:43:17,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 01:43:17,495 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 01:43:17,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 01:43:17,496 INFO L85 PathProgramCache]: Analyzing trace with hash -327041344, now seen corresponding path program 1 times [2022-11-23 01:43:17,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 01:43:17,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623908846] [2022-11-23 01:43:17,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:43:17,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 01:43:17,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:43:17,637 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 01:43:17,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 01:43:17,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623908846] [2022-11-23 01:43:17,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623908846] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 01:43:17,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730460531] [2022-11-23 01:43:17,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:43:17,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 01:43:17,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15005804-f7ff-499c-a226-b70d74029075/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 01:43:17,648 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15005804-f7ff-499c-a226-b70d74029075/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 01:43:17,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15005804-f7ff-499c-a226-b70d74029075/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 01:43:17,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:43:17,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-23 01:43:17,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 01:43:17,891 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 01:43:17,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 01:43:17,915 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 01:43:17,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730460531] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 01:43:17,916 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 01:43:17,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2022-11-23 01:43:17,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673832507] [2022-11-23 01:43:17,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 01:43:17,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 01:43:17,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 01:43:17,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 01:43:17,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2022-11-23 01:43:17,976 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 258 out of 561 [2022-11-23 01:43:17,979 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 34 transitions, 83 flow. Second operand has 8 states, 8 states have (on average 259.5) internal successors, (2076), 8 states have internal predecessors, (2076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:43:17,980 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 01:43:17,980 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 258 of 561 [2022-11-23 01:43:17,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 01:43:18,099 INFO L130 PetriNetUnfolder]: 82/170 cut-off events. [2022-11-23 01:43:18,100 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-23 01:43:18,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 353 conditions, 170 events. 82/170 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 470 event pairs, 57 based on Foata normal form. 0/120 useless extension candidates. Maximal degree in co-relation 341. Up to 167 conditions per place. [2022-11-23 01:43:18,101 INFO L137 encePairwiseOnDemand]: 558/561 looper letters, 31 selfloop transitions, 3 changer transitions 0/35 dead transitions. [2022-11-23 01:43:18,102 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 35 transitions, 155 flow [2022-11-23 01:43:18,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 01:43:18,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-23 01:43:18,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1067 transitions. [2022-11-23 01:43:18,106 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47549019607843135 [2022-11-23 01:43:18,106 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1067 transitions. [2022-11-23 01:43:18,106 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1067 transitions. [2022-11-23 01:43:18,107 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 01:43:18,107 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1067 transitions. [2022-11-23 01:43:18,110 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 266.75) internal successors, (1067), 4 states have internal predecessors, (1067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:43:18,116 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 561.0) internal successors, (2805), 5 states have internal predecessors, (2805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:43:18,118 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 561.0) internal successors, (2805), 5 states have internal predecessors, (2805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:43:18,119 INFO L175 Difference]: Start difference. First operand has 32 places, 34 transitions, 83 flow. Second operand 4 states and 1067 transitions. [2022-11-23 01:43:18,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 35 transitions, 155 flow [2022-11-23 01:43:18,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 35 transitions, 151 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-11-23 01:43:18,121 INFO L231 Difference]: Finished difference. Result has 35 places, 35 transitions, 95 flow [2022-11-23 01:43:18,143 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=561, PETRI_DIFFERENCE_MINUEND_FLOW=79, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=95, PETRI_PLACES=35, PETRI_TRANSITIONS=35} [2022-11-23 01:43:18,144 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 5 predicate places. [2022-11-23 01:43:18,144 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 35 transitions, 95 flow [2022-11-23 01:43:18,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 259.5) internal successors, (2076), 8 states have internal predecessors, (2076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:43:18,146 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 01:43:18,146 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2022-11-23 01:43:18,164 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15005804-f7ff-499c-a226-b70d74029075/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-23 01:43:18,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15005804-f7ff-499c-a226-b70d74029075/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-11-23 01:43:18,357 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 01:43:18,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 01:43:18,357 INFO L85 PathProgramCache]: Analyzing trace with hash 1444420321, now seen corresponding path program 2 times [2022-11-23 01:43:18,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 01:43:18,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248276649] [2022-11-23 01:43:18,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:43:18,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 01:43:18,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-23 01:43:18,391 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-23 01:43:18,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-23 01:43:18,436 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-23 01:43:18,437 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-23 01:43:18,438 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2022-11-23 01:43:18,441 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2022-11-23 01:43:18,442 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2022-11-23 01:43:18,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-23 01:43:18,442 INFO L444 BasicCegarLoop]: Path program histogram: [2, 1] [2022-11-23 01:43:18,445 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-23 01:43:18,445 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-23 01:43:18,515 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-23 01:43:18,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 446 places, 471 transitions, 960 flow [2022-11-23 01:43:18,650 INFO L130 PetriNetUnfolder]: 36/524 cut-off events. [2022-11-23 01:43:18,651 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-11-23 01:43:18,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 538 conditions, 524 events. 36/524 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1626 event pairs, 0 based on Foata normal form. 0/482 useless extension candidates. Maximal degree in co-relation 406. Up to 8 conditions per place. [2022-11-23 01:43:18,657 INFO L82 GeneralOperation]: Start removeDead. Operand has 446 places, 471 transitions, 960 flow [2022-11-23 01:43:18,663 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 446 places, 471 transitions, 960 flow [2022-11-23 01:43:18,663 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-23 01:43:18,664 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 446 places, 471 transitions, 960 flow [2022-11-23 01:43:18,664 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 446 places, 471 transitions, 960 flow [2022-11-23 01:43:18,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 446 places, 471 transitions, 960 flow [2022-11-23 01:43:18,826 INFO L130 PetriNetUnfolder]: 36/524 cut-off events. [2022-11-23 01:43:18,826 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-11-23 01:43:18,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 538 conditions, 524 events. 36/524 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1626 event pairs, 0 based on Foata normal form. 0/482 useless extension candidates. Maximal degree in co-relation 406. Up to 8 conditions per place. [2022-11-23 01:43:18,865 INFO L119 LiptonReduction]: Number of co-enabled transitions 88908 [2022-11-23 01:43:37,253 INFO L134 LiptonReduction]: Checked pairs total: 90975 [2022-11-23 01:43:37,254 INFO L136 LiptonReduction]: Total number of compositions: 459 [2022-11-23 01:43:37,256 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 01:43:37,257 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;@4dfa1e15, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 01:43:37,257 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-11-23 01:43:37,261 INFO L130 PetriNetUnfolder]: 1/20 cut-off events. [2022-11-23 01:43:37,261 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-23 01:43:37,262 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 01:43:37,262 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 01:43:37,262 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting threadErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-23 01:43:37,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 01:43:37,263 INFO L85 PathProgramCache]: Analyzing trace with hash 1622868266, now seen corresponding path program 1 times [2022-11-23 01:43:37,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 01:43:37,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890902534] [2022-11-23 01:43:37,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:43:37,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 01:43:37,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:43:37,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:43:37,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 01:43:37,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890902534] [2022-11-23 01:43:37,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890902534] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 01:43:37,373 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 01:43:37,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 01:43:37,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267540936] [2022-11-23 01:43:37,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 01:43:37,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 01:43:37,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 01:43:37,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 01:43:37,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 01:43:37,401 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 433 out of 930 [2022-11-23 01:43:37,403 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 82 transitions, 182 flow. Second operand has 3 states, 3 states have (on average 435.6666666666667) internal successors, (1307), 3 states have internal predecessors, (1307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:43:37,403 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 01:43:37,403 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 433 of 930 [2022-11-23 01:43:37,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 01:43:39,279 INFO L130 PetriNetUnfolder]: 8734/12806 cut-off events. [2022-11-23 01:43:39,280 INFO L131 PetriNetUnfolder]: For 210/210 co-relation queries the response was YES. [2022-11-23 01:43:39,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25716 conditions, 12806 events. 8734/12806 cut-off events. For 210/210 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 69095 event pairs, 6840 based on Foata normal form. 0/9299 useless extension candidates. Maximal degree in co-relation 20786. Up to 12767 conditions per place. [2022-11-23 01:43:39,352 INFO L137 encePairwiseOnDemand]: 921/930 looper letters, 72 selfloop transitions, 2 changer transitions 0/77 dead transitions. [2022-11-23 01:43:39,352 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 77 transitions, 320 flow [2022-11-23 01:43:39,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 01:43:39,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 01:43:39,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1380 transitions. [2022-11-23 01:43:39,357 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4946236559139785 [2022-11-23 01:43:39,361 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1380 transitions. [2022-11-23 01:43:39,362 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1380 transitions. [2022-11-23 01:43:39,363 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 01:43:39,363 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1380 transitions. [2022-11-23 01:43:39,366 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 460.0) internal successors, (1380), 3 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:43:39,373 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 930.0) internal successors, (3720), 4 states have internal predecessors, (3720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:43:39,375 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 930.0) internal successors, (3720), 4 states have internal predecessors, (3720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:43:39,376 INFO L175 Difference]: Start difference. First operand has 66 places, 82 transitions, 182 flow. Second operand 3 states and 1380 transitions. [2022-11-23 01:43:39,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 77 transitions, 320 flow [2022-11-23 01:43:39,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 77 transitions, 320 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-23 01:43:39,382 INFO L231 Difference]: Finished difference. Result has 69 places, 77 transitions, 182 flow [2022-11-23 01:43:39,382 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=930, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=182, PETRI_PLACES=69, PETRI_TRANSITIONS=77} [2022-11-23 01:43:39,385 INFO L288 CegarLoopForPetriNet]: 66 programPoint places, 3 predicate places. [2022-11-23 01:43:39,385 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 77 transitions, 182 flow [2022-11-23 01:43:39,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 435.6666666666667) internal successors, (1307), 3 states have internal predecessors, (1307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:43:39,386 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 01:43:39,387 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 01:43:39,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-23 01:43:39,387 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting threadErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-23 01:43:39,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 01:43:39,388 INFO L85 PathProgramCache]: Analyzing trace with hash 1360798139, now seen corresponding path program 1 times [2022-11-23 01:43:39,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 01:43:39,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150182927] [2022-11-23 01:43:39,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:43:39,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 01:43:39,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:43:39,547 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 01:43:39,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 01:43:39,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150182927] [2022-11-23 01:43:39,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150182927] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 01:43:39,549 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 01:43:39,549 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 01:43:39,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539975633] [2022-11-23 01:43:39,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 01:43:39,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 01:43:39,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 01:43:39,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 01:43:39,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 01:43:39,747 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 425 out of 930 [2022-11-23 01:43:39,749 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 77 transitions, 182 flow. Second operand has 3 states, 3 states have (on average 428.6666666666667) internal successors, (1286), 3 states have internal predecessors, (1286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:43:39,749 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 01:43:39,750 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 425 of 930 [2022-11-23 01:43:39,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 01:43:42,006 INFO L130 PetriNetUnfolder]: 10597/15620 cut-off events. [2022-11-23 01:43:42,006 INFO L131 PetriNetUnfolder]: For 234/234 co-relation queries the response was YES. [2022-11-23 01:43:42,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31380 conditions, 15620 events. 10597/15620 cut-off events. For 234/234 co-relation queries the response was YES. Maximal size of possible extension queue 455. Compared 90323 event pairs, 5934 based on Foata normal form. 0/11556 useless extension candidates. Maximal degree in co-relation 31367. Up to 13032 conditions per place. [2022-11-23 01:43:42,100 INFO L137 encePairwiseOnDemand]: 917/930 looper letters, 104 selfloop transitions, 12 changer transitions 2/121 dead transitions. [2022-11-23 01:43:42,100 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 121 transitions, 514 flow [2022-11-23 01:43:42,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 01:43:42,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 01:43:42,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1393 transitions. [2022-11-23 01:43:42,105 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4992831541218638 [2022-11-23 01:43:42,105 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1393 transitions. [2022-11-23 01:43:42,106 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1393 transitions. [2022-11-23 01:43:42,108 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 01:43:42,108 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1393 transitions. [2022-11-23 01:43:42,111 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 464.3333333333333) internal successors, (1393), 3 states have internal predecessors, (1393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:43:42,118 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 930.0) internal successors, (3720), 4 states have internal predecessors, (3720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:43:42,120 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 930.0) internal successors, (3720), 4 states have internal predecessors, (3720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:43:42,120 INFO L175 Difference]: Start difference. First operand has 69 places, 77 transitions, 182 flow. Second operand 3 states and 1393 transitions. [2022-11-23 01:43:42,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 121 transitions, 514 flow [2022-11-23 01:43:42,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 121 transitions, 510 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-11-23 01:43:42,125 INFO L231 Difference]: Finished difference. Result has 72 places, 88 transitions, 272 flow [2022-11-23 01:43:42,126 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=930, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=272, PETRI_PLACES=72, PETRI_TRANSITIONS=88} [2022-11-23 01:43:42,128 INFO L288 CegarLoopForPetriNet]: 66 programPoint places, 6 predicate places. [2022-11-23 01:43:42,128 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 88 transitions, 272 flow [2022-11-23 01:43:42,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 428.6666666666667) internal successors, (1286), 3 states have internal predecessors, (1286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:43:42,129 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 01:43:42,129 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-23 01:43:42,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-23 01:43:42,130 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-23 01:43:42,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 01:43:42,131 INFO L85 PathProgramCache]: Analyzing trace with hash -1318867151, now seen corresponding path program 1 times [2022-11-23 01:43:42,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 01:43:42,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007398001] [2022-11-23 01:43:42,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:43:42,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 01:43:42,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:43:42,285 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-23 01:43:42,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 01:43:42,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007398001] [2022-11-23 01:43:42,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007398001] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 01:43:42,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031025395] [2022-11-23 01:43:42,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:43:42,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 01:43:42,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15005804-f7ff-499c-a226-b70d74029075/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 01:43:42,288 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15005804-f7ff-499c-a226-b70d74029075/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 01:43:42,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15005804-f7ff-499c-a226-b70d74029075/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 01:43:42,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:43:42,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-23 01:43:42,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 01:43:42,512 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-23 01:43:42,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 01:43:42,543 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-23 01:43:42,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031025395] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 01:43:42,543 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 01:43:42,543 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2022-11-23 01:43:42,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309579022] [2022-11-23 01:43:42,544 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 01:43:42,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 01:43:42,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 01:43:42,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 01:43:42,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2022-11-23 01:43:42,630 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 431 out of 930 [2022-11-23 01:43:42,634 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 88 transitions, 272 flow. Second operand has 8 states, 8 states have (on average 432.625) internal successors, (3461), 8 states have internal predecessors, (3461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:43:42,634 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 01:43:42,634 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 431 of 930 [2022-11-23 01:43:42,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 01:43:44,841 INFO L130 PetriNetUnfolder]: 10597/15632 cut-off events. [2022-11-23 01:43:44,842 INFO L131 PetriNetUnfolder]: For 2759/2759 co-relation queries the response was YES. [2022-11-23 01:43:44,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35584 conditions, 15632 events. 10597/15632 cut-off events. For 2759/2759 co-relation queries the response was YES. Maximal size of possible extension queue 456. Compared 89232 event pairs, 7796 based on Foata normal form. 0/12872 useless extension candidates. Maximal degree in co-relation 35563. Up to 15562 conditions per place. [2022-11-23 01:43:44,941 INFO L137 encePairwiseOnDemand]: 927/930 looper letters, 83 selfloop transitions, 3 changer transitions 0/89 dead transitions. [2022-11-23 01:43:44,942 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 89 transitions, 448 flow [2022-11-23 01:43:44,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 01:43:44,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-23 01:43:44,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1800 transitions. [2022-11-23 01:43:44,949 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4838709677419355 [2022-11-23 01:43:44,949 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1800 transitions. [2022-11-23 01:43:44,949 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1800 transitions. [2022-11-23 01:43:44,952 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 01:43:44,952 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1800 transitions. [2022-11-23 01:43:44,958 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 450.0) internal successors, (1800), 4 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:43:44,967 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 930.0) internal successors, (4650), 5 states have internal predecessors, (4650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:43:44,970 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 930.0) internal successors, (4650), 5 states have internal predecessors, (4650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:43:44,971 INFO L175 Difference]: Start difference. First operand has 72 places, 88 transitions, 272 flow. Second operand 4 states and 1800 transitions. [2022-11-23 01:43:44,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 89 transitions, 448 flow [2022-11-23 01:43:45,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 89 transitions, 424 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-23 01:43:45,024 INFO L231 Difference]: Finished difference. Result has 74 places, 89 transitions, 264 flow [2022-11-23 01:43:45,025 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=930, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=264, PETRI_PLACES=74, PETRI_TRANSITIONS=89} [2022-11-23 01:43:45,028 INFO L288 CegarLoopForPetriNet]: 66 programPoint places, 8 predicate places. [2022-11-23 01:43:45,028 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 89 transitions, 264 flow [2022-11-23 01:43:45,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 432.625) internal successors, (3461), 8 states have internal predecessors, (3461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:43:45,030 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 01:43:45,030 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1] [2022-11-23 01:43:45,042 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15005804-f7ff-499c-a226-b70d74029075/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 01:43:45,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15005804-f7ff-499c-a226-b70d74029075/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 01:43:45,237 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-23 01:43:45,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 01:43:45,237 INFO L85 PathProgramCache]: Analyzing trace with hash -722960741, now seen corresponding path program 2 times [2022-11-23 01:43:45,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 01:43:45,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814174842] [2022-11-23 01:43:45,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:43:45,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 01:43:45,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-23 01:43:45,289 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-23 01:43:45,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-23 01:43:45,348 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-23 01:43:45,350 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-23 01:43:45,351 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2022-11-23 01:43:45,352 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2022-11-23 01:43:45,353 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2022-11-23 01:43:45,354 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-11-23 01:43:45,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-23 01:43:45,355 INFO L444 BasicCegarLoop]: Path program histogram: [2, 1, 1] [2022-11-23 01:43:45,357 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-23 01:43:45,357 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-11-23 01:43:45,454 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-23 01:43:45,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 623 places, 659 transitions, 1348 flow [2022-11-23 01:43:45,910 INFO L130 PetriNetUnfolder]: 58/779 cut-off events. [2022-11-23 01:43:45,911 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-11-23 01:43:45,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 807 conditions, 779 events. 58/779 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 3299 event pairs, 1 based on Foata normal form. 0/714 useless extension candidates. Maximal degree in co-relation 622. Up to 16 conditions per place. [2022-11-23 01:43:45,925 INFO L82 GeneralOperation]: Start removeDead. Operand has 623 places, 659 transitions, 1348 flow [2022-11-23 01:43:45,932 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 623 places, 659 transitions, 1348 flow [2022-11-23 01:43:45,933 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-23 01:43:45,933 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 623 places, 659 transitions, 1348 flow [2022-11-23 01:43:45,933 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 623 places, 659 transitions, 1348 flow [2022-11-23 01:43:45,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 623 places, 659 transitions, 1348 flow [2022-11-23 01:43:46,200 INFO L130 PetriNetUnfolder]: 58/779 cut-off events. [2022-11-23 01:43:46,201 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-11-23 01:43:46,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 807 conditions, 779 events. 58/779 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 3299 event pairs, 1 based on Foata normal form. 0/714 useless extension candidates. Maximal degree in co-relation 622. Up to 16 conditions per place. [2022-11-23 01:43:46,301 INFO L119 LiptonReduction]: Number of co-enabled transitions 238824 [2022-11-23 01:44:24,914 INFO L134 LiptonReduction]: Checked pairs total: 249742 [2022-11-23 01:44:24,914 INFO L136 LiptonReduction]: Total number of compositions: 645 [2022-11-23 01:44:24,916 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 01:44:24,917 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;@4dfa1e15, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 01:44:24,917 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-11-23 01:44:24,920 INFO L130 PetriNetUnfolder]: 1/21 cut-off events. [2022-11-23 01:44:24,920 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-23 01:44:24,921 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 01:44:24,921 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 01:44:24,921 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting threadErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-11-23 01:44:24,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 01:44:24,922 INFO L85 PathProgramCache]: Analyzing trace with hash 1667902328, now seen corresponding path program 1 times [2022-11-23 01:44:24,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 01:44:24,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529179759] [2022-11-23 01:44:24,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:44:24,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 01:44:24,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:44:25,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:44:25,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 01:44:25,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529179759] [2022-11-23 01:44:25,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529179759] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 01:44:25,010 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 01:44:25,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 01:44:25,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384210881] [2022-11-23 01:44:25,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 01:44:25,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 01:44:25,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 01:44:25,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 01:44:25,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 01:44:25,050 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 606 out of 1304 [2022-11-23 01:44:25,052 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 117 transitions, 264 flow. Second operand has 3 states, 3 states have (on average 608.6666666666666) internal successors, (1826), 3 states have internal predecessors, (1826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:44:25,052 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 01:44:25,052 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 606 of 1304 [2022-11-23 01:44:25,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand