./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-ext/48_ticket_lock_low_contention_vs.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9e14636-864a-4f61-b0d5-9169b851d365/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9e14636-864a-4f61-b0d5-9169b851d365/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9e14636-864a-4f61-b0d5-9169b851d365/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9e14636-864a-4f61-b0d5-9169b851d365/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-ext/48_ticket_lock_low_contention_vs.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9e14636-864a-4f61-b0d5-9169b851d365/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9e14636-864a-4f61-b0d5-9169b851d365/bin/uautomizer-uyxdKDjOR8 --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 31f5db4bc5916150a86a586587dbeca1bc7aa37b414274f5dc02856908270171 --- 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-2329fc7 [2022-12-13 12:12:45,660 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 12:12:45,662 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 12:12:45,678 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 12:12:45,679 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 12:12:45,680 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 12:12:45,681 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 12:12:45,682 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 12:12:45,684 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 12:12:45,684 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 12:12:45,685 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 12:12:45,686 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 12:12:45,687 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 12:12:45,688 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 12:12:45,689 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 12:12:45,689 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 12:12:45,690 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 12:12:45,691 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 12:12:45,692 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 12:12:45,694 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 12:12:45,695 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 12:12:45,696 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 12:12:45,697 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 12:12:45,698 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 12:12:45,706 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 12:12:45,706 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 12:12:45,707 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 12:12:45,708 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 12:12:45,708 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 12:12:45,709 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 12:12:45,709 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 12:12:45,710 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 12:12:45,711 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 12:12:45,712 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 12:12:45,713 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 12:12:45,713 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 12:12:45,713 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 12:12:45,714 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 12:12:45,714 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 12:12:45,715 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 12:12:45,715 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 12:12:45,716 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9e14636-864a-4f61-b0d5-9169b851d365/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 12:12:45,738 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 12:12:45,738 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 12:12:45,738 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 12:12:45,739 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 12:12:45,746 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 12:12:45,746 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 12:12:45,747 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 12:12:45,747 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 12:12:45,747 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 12:12:45,747 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 12:12:45,748 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 12:12:45,748 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 12:12:45,748 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 12:12:45,748 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 12:12:45,748 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 12:12:45,748 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 12:12:45,748 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 12:12:45,749 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 12:12:45,749 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 12:12:45,749 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 12:12:45,749 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 12:12:45,749 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 12:12:45,749 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 12:12:45,749 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 12:12:45,750 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 12:12:45,750 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 12:12:45,750 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 12:12:45,750 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 12:12:45,750 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 12:12:45,750 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 12:12:45,751 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 12:12:45,751 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 12:12:45,751 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 12:12:45,751 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 12:12:45,751 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 12:12:45,751 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_d9e14636-864a-4f61-b0d5-9169b851d365/bin/uautomizer-uyxdKDjOR8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9e14636-864a-4f61-b0d5-9169b851d365/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 31f5db4bc5916150a86a586587dbeca1bc7aa37b414274f5dc02856908270171 [2022-12-13 12:12:45,924 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 12:12:45,939 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 12:12:45,941 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 12:12:45,942 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 12:12:45,942 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 12:12:45,943 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9e14636-864a-4f61-b0d5-9169b851d365/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/pthread-ext/48_ticket_lock_low_contention_vs.i [2022-12-13 12:12:48,468 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 12:12:48,628 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 12:12:48,629 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9e14636-864a-4f61-b0d5-9169b851d365/sv-benchmarks/c/pthread-ext/48_ticket_lock_low_contention_vs.i [2022-12-13 12:12:48,637 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9e14636-864a-4f61-b0d5-9169b851d365/bin/uautomizer-uyxdKDjOR8/data/564527097/53e5754644fe47f6a06c2853bbb67526/FLAGddf6f679b [2022-12-13 12:12:49,027 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9e14636-864a-4f61-b0d5-9169b851d365/bin/uautomizer-uyxdKDjOR8/data/564527097/53e5754644fe47f6a06c2853bbb67526 [2022-12-13 12:12:49,029 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 12:12:49,030 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 12:12:49,031 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 12:12:49,031 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 12:12:49,035 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 12:12:49,035 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 12:12:49" (1/1) ... [2022-12-13 12:12:49,036 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@737084e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:12:49, skipping insertion in model container [2022-12-13 12:12:49,036 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 12:12:49" (1/1) ... [2022-12-13 12:12:49,041 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 12:12:49,075 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 12:12:49,203 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-12-13 12:12:49,297 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 12:12:49,298 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 12:12:49,299 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_d9e14636-864a-4f61-b0d5-9169b851d365/sv-benchmarks/c/pthread-ext/48_ticket_lock_low_contention_vs.i[30893,30906] [2022-12-13 12:12:49,303 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 12:12:49,304 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 12:12:49,307 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 12:12:49,314 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 12:12:49,326 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-12-13 12:12:49,349 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 12:12:49,350 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 12:12:49,351 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_d9e14636-864a-4f61-b0d5-9169b851d365/sv-benchmarks/c/pthread-ext/48_ticket_lock_low_contention_vs.i[30893,30906] [2022-12-13 12:12:49,351 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 12:12:49,352 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 12:12:49,354 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 12:12:49,378 INFO L208 MainTranslator]: Completed translation [2022-12-13 12:12:49,379 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:12:49 WrapperNode [2022-12-13 12:12:49,379 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 12:12:49,380 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 12:12:49,380 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 12:12:49,380 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 12:12:49,385 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:12:49" (1/1) ... [2022-12-13 12:12:49,397 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:12:49" (1/1) ... [2022-12-13 12:12:49,416 INFO L138 Inliner]: procedures = 173, calls = 24, calls flagged for inlining = 5, calls inlined = 7, statements flattened = 108 [2022-12-13 12:12:49,416 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 12:12:49,417 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 12:12:49,417 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 12:12:49,417 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 12:12:49,425 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:12:49" (1/1) ... [2022-12-13 12:12:49,425 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:12:49" (1/1) ... [2022-12-13 12:12:49,427 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:12:49" (1/1) ... [2022-12-13 12:12:49,428 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:12:49" (1/1) ... [2022-12-13 12:12:49,432 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:12:49" (1/1) ... [2022-12-13 12:12:49,434 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:12:49" (1/1) ... [2022-12-13 12:12:49,435 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:12:49" (1/1) ... [2022-12-13 12:12:49,436 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:12:49" (1/1) ... [2022-12-13 12:12:49,438 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 12:12:49,438 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 12:12:49,438 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 12:12:49,439 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 12:12:49,439 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:12:49" (1/1) ... [2022-12-13 12:12:49,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 12:12:49,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9e14636-864a-4f61-b0d5-9169b851d365/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:12:49,460 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9e14636-864a-4f61-b0d5-9169b851d365/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 12:12:49,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9e14636-864a-4f61-b0d5-9169b851d365/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 12:12:49,486 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 12:12:49,486 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2022-12-13 12:12:49,486 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2022-12-13 12:12:49,486 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 12:12:49,487 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-13 12:12:49,487 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 12:12:49,487 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 12:12:49,487 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 12:12:49,487 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 12:12:49,487 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-13 12:12:49,487 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 12:12:49,487 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 12:12:49,488 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-13 12:12:49,571 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 12:12:49,573 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 12:12:49,726 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 12:12:49,814 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 12:12:49,814 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-13 12:12:49,817 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 12:12:49 BoogieIcfgContainer [2022-12-13 12:12:49,817 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 12:12:49,820 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 12:12:49,820 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 12:12:49,823 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 12:12:49,823 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 12:12:49" (1/3) ... [2022-12-13 12:12:49,824 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@addb28c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 12:12:49, skipping insertion in model container [2022-12-13 12:12:49,824 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:12:49" (2/3) ... [2022-12-13 12:12:49,824 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@addb28c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 12:12:49, skipping insertion in model container [2022-12-13 12:12:49,825 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 12:12:49" (3/3) ... [2022-12-13 12:12:49,826 INFO L112 eAbstractionObserver]: Analyzing ICFG 48_ticket_lock_low_contention_vs.i [2022-12-13 12:12:49,834 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-12-13 12:12:49,845 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 12:12:49,846 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-12-13 12:12:49,846 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 12:12:49,884 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-13 12:12:49,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 73 places, 75 transitions, 155 flow [2022-12-13 12:12:49,954 INFO L130 PetriNetUnfolder]: 8/113 cut-off events. [2022-12-13 12:12:49,954 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 12:12:49,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118 conditions, 113 events. 8/113 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 208 event pairs, 0 based on Foata normal form. 0/100 useless extension candidates. Maximal degree in co-relation 57. Up to 4 conditions per place. [2022-12-13 12:12:49,958 INFO L82 GeneralOperation]: Start removeDead. Operand has 73 places, 75 transitions, 155 flow [2022-12-13 12:12:49,960 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 73 places, 75 transitions, 155 flow [2022-12-13 12:12:49,963 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 12:12:49,971 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 73 places, 75 transitions, 155 flow [2022-12-13 12:12:49,973 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 73 places, 75 transitions, 155 flow [2022-12-13 12:12:49,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 73 places, 75 transitions, 155 flow [2022-12-13 12:12:49,990 INFO L130 PetriNetUnfolder]: 8/113 cut-off events. [2022-12-13 12:12:49,990 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 12:12:49,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118 conditions, 113 events. 8/113 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 208 event pairs, 0 based on Foata normal form. 0/100 useless extension candidates. Maximal degree in co-relation 57. Up to 4 conditions per place. [2022-12-13 12:12:49,992 INFO L119 LiptonReduction]: Number of co-enabled transitions 1394 [2022-12-13 12:12:50,915 INFO L134 LiptonReduction]: Checked pairs total: 4347 [2022-12-13 12:12:50,916 INFO L136 LiptonReduction]: Total number of compositions: 55 [2022-12-13 12:12:50,932 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 12:12:50,938 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;@3ce73081, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 12:12:50,938 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-12-13 12:12:50,943 INFO L130 PetriNetUnfolder]: 2/16 cut-off events. [2022-12-13 12:12:50,944 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 12:12:50,944 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:12:50,945 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2022-12-13 12:12:50,945 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 12:12:50,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:12:50,950 INFO L85 PathProgramCache]: Analyzing trace with hash -1563492124, now seen corresponding path program 1 times [2022-12-13 12:12:50,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:12:50,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812711829] [2022-12-13 12:12:50,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:12:50,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:12:51,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 12:12:51,046 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 12:12:51,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 12:12:51,080 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 12:12:51,082 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 12:12:51,083 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2022-12-13 12:12:51,084 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2022-12-13 12:12:51,085 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2022-12-13 12:12:51,085 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-12-13 12:12:51,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 12:12:51,085 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2022-12-13 12:12:51,088 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 12:12:51,088 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-12-13 12:12:51,101 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-13 12:12:51,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 91 places, 93 transitions, 198 flow [2022-12-13 12:12:51,123 INFO L130 PetriNetUnfolder]: 13/171 cut-off events. [2022-12-13 12:12:51,123 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 12:12:51,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 181 conditions, 171 events. 13/171 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 440 event pairs, 0 based on Foata normal form. 0/150 useless extension candidates. Maximal degree in co-relation 114. Up to 6 conditions per place. [2022-12-13 12:12:51,124 INFO L82 GeneralOperation]: Start removeDead. Operand has 91 places, 93 transitions, 198 flow [2022-12-13 12:12:51,125 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 91 places, 93 transitions, 198 flow [2022-12-13 12:12:51,125 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 12:12:51,125 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 91 places, 93 transitions, 198 flow [2022-12-13 12:12:51,126 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 91 places, 93 transitions, 198 flow [2022-12-13 12:12:51,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 91 places, 93 transitions, 198 flow [2022-12-13 12:12:51,143 INFO L130 PetriNetUnfolder]: 13/171 cut-off events. [2022-12-13 12:12:51,143 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 12:12:51,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 181 conditions, 171 events. 13/171 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 440 event pairs, 0 based on Foata normal form. 0/150 useless extension candidates. Maximal degree in co-relation 114. Up to 6 conditions per place. [2022-12-13 12:12:51,146 INFO L119 LiptonReduction]: Number of co-enabled transitions 3400 [2022-12-13 12:12:52,010 INFO L134 LiptonReduction]: Checked pairs total: 12008 [2022-12-13 12:12:52,010 INFO L136 LiptonReduction]: Total number of compositions: 62 [2022-12-13 12:12:52,012 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 12:12:52,013 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;@3ce73081, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 12:12:52,014 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-12-13 12:12:52,017 INFO L130 PetriNetUnfolder]: 3/19 cut-off events. [2022-12-13 12:12:52,017 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 12:12:52,017 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:12:52,017 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 12:12:52,017 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-12-13 12:12:52,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:12:52,018 INFO L85 PathProgramCache]: Analyzing trace with hash -735954132, now seen corresponding path program 1 times [2022-12-13 12:12:52,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:12:52,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663866511] [2022-12-13 12:12:52,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:12:52,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:12:52,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:12:52,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:12:52,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:12:52,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663866511] [2022-12-13 12:12:52,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663866511] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:12:52,201 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:12:52,202 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 12:12:52,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405460554] [2022-12-13 12:12:52,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:12:52,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 12:12:52,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:12:52,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 12:12:52,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 12:12:52,246 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 155 [2022-12-13 12:12:52,247 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 44 transitions, 100 flow. Second operand has 3 states, 3 states have (on average 64.0) internal successors, (192), 3 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:12:52,248 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:12:52,248 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 155 [2022-12-13 12:12:52,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:12:52,555 INFO L130 PetriNetUnfolder]: 1886/3179 cut-off events. [2022-12-13 12:12:52,556 INFO L131 PetriNetUnfolder]: For 26/26 co-relation queries the response was YES. [2022-12-13 12:12:52,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6145 conditions, 3179 events. 1886/3179 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 17950 event pairs, 1093 based on Foata normal form. 263/3068 useless extension candidates. Maximal degree in co-relation 3762. Up to 2293 conditions per place. [2022-12-13 12:12:52,570 INFO L137 encePairwiseOnDemand]: 143/155 looper letters, 53 selfloop transitions, 6 changer transitions 0/65 dead transitions. [2022-12-13 12:12:52,570 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 65 transitions, 265 flow [2022-12-13 12:12:52,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 12:12:52,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 12:12:52,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 254 transitions. [2022-12-13 12:12:52,582 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.546236559139785 [2022-12-13 12:12:52,583 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 254 transitions. [2022-12-13 12:12:52,583 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 254 transitions. [2022-12-13 12:12:52,584 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:12:52,586 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 254 transitions. [2022-12-13 12:12:52,589 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:12:52,593 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 155.0) internal successors, (620), 4 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:12:52,594 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 155.0) internal successors, (620), 4 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:12:52,596 INFO L175 Difference]: Start difference. First operand has 43 places, 44 transitions, 100 flow. Second operand 3 states and 254 transitions. [2022-12-13 12:12:52,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 65 transitions, 265 flow [2022-12-13 12:12:52,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 65 transitions, 263 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-12-13 12:12:52,601 INFO L231 Difference]: Finished difference. Result has 44 places, 44 transitions, 140 flow [2022-12-13 12:12:52,603 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=155, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=140, PETRI_PLACES=44, PETRI_TRANSITIONS=44} [2022-12-13 12:12:52,606 INFO L288 CegarLoopForPetriNet]: 43 programPoint places, 1 predicate places. [2022-12-13 12:12:52,606 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 44 transitions, 140 flow [2022-12-13 12:12:52,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.0) internal successors, (192), 3 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:12:52,606 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:12:52,607 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2022-12-13 12:12:52,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 12:12:52,607 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-12-13 12:12:52,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:12:52,608 INFO L85 PathProgramCache]: Analyzing trace with hash -2127629689, now seen corresponding path program 1 times [2022-12-13 12:12:52,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:12:52,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605781056] [2022-12-13 12:12:52,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:12:52,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:12:52,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 12:12:52,621 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 12:12:52,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 12:12:52,630 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 12:12:52,630 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 12:12:52,630 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-12-13 12:12:52,631 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-12-13 12:12:52,631 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2022-12-13 12:12:52,631 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-12-13 12:12:52,631 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-12-13 12:12:52,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 12:12:52,631 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2022-12-13 12:12:52,631 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 12:12:52,632 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-12-13 12:12:52,645 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-13 12:12:52,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 109 places, 111 transitions, 243 flow [2022-12-13 12:12:52,664 INFO L130 PetriNetUnfolder]: 18/229 cut-off events. [2022-12-13 12:12:52,664 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-12-13 12:12:52,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 245 conditions, 229 events. 18/229 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 673 event pairs, 0 based on Foata normal form. 0/200 useless extension candidates. Maximal degree in co-relation 175. Up to 8 conditions per place. [2022-12-13 12:12:52,665 INFO L82 GeneralOperation]: Start removeDead. Operand has 109 places, 111 transitions, 243 flow [2022-12-13 12:12:52,666 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 109 places, 111 transitions, 243 flow [2022-12-13 12:12:52,666 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 12:12:52,667 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 109 places, 111 transitions, 243 flow [2022-12-13 12:12:52,667 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 109 places, 111 transitions, 243 flow [2022-12-13 12:12:52,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 109 places, 111 transitions, 243 flow [2022-12-13 12:12:52,683 INFO L130 PetriNetUnfolder]: 18/229 cut-off events. [2022-12-13 12:12:52,683 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-12-13 12:12:52,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 245 conditions, 229 events. 18/229 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 673 event pairs, 0 based on Foata normal form. 0/200 useless extension candidates. Maximal degree in co-relation 175. Up to 8 conditions per place. [2022-12-13 12:12:52,687 INFO L119 LiptonReduction]: Number of co-enabled transitions 6018 [2022-12-13 12:12:53,599 INFO L134 LiptonReduction]: Checked pairs total: 21520 [2022-12-13 12:12:53,600 INFO L136 LiptonReduction]: Total number of compositions: 69 [2022-12-13 12:12:53,601 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 12:12:53,602 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;@3ce73081, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 12:12:53,602 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-12-13 12:12:53,605 INFO L130 PetriNetUnfolder]: 3/19 cut-off events. [2022-12-13 12:12:53,605 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 12:12:53,605 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:12:53,605 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 12:12:53,605 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-12-13 12:12:53,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:12:53,605 INFO L85 PathProgramCache]: Analyzing trace with hash 825833286, now seen corresponding path program 1 times [2022-12-13 12:12:53,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:12:53,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008712992] [2022-12-13 12:12:53,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:12:53,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:12:53,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:12:53,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:12:53,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:12:53,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008712992] [2022-12-13 12:12:53,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008712992] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:12:53,681 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:12:53,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 12:12:53,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402708224] [2022-12-13 12:12:53,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:12:53,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 12:12:53,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:12:53,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 12:12:53,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 12:12:53,701 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 180 [2022-12-13 12:12:53,702 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 55 transitions, 131 flow. Second operand has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:12:53,702 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:12:53,702 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 180 [2022-12-13 12:12:53,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:12:56,667 INFO L130 PetriNetUnfolder]: 35438/50764 cut-off events. [2022-12-13 12:12:56,667 INFO L131 PetriNetUnfolder]: For 637/637 co-relation queries the response was YES. [2022-12-13 12:12:56,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99666 conditions, 50764 events. 35438/50764 cut-off events. For 637/637 co-relation queries the response was YES. Maximal size of possible extension queue 1543. Compared 336802 event pairs, 18959 based on Foata normal form. 3744/47419 useless extension candidates. Maximal degree in co-relation 23209. Up to 34788 conditions per place. [2022-12-13 12:12:56,875 INFO L137 encePairwiseOnDemand]: 164/180 looper letters, 73 selfloop transitions, 8 changer transitions 0/87 dead transitions. [2022-12-13 12:12:56,875 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 87 transitions, 369 flow [2022-12-13 12:12:56,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 12:12:56,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 12:12:56,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 302 transitions. [2022-12-13 12:12:56,879 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5592592592592592 [2022-12-13 12:12:56,879 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 302 transitions. [2022-12-13 12:12:56,879 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 302 transitions. [2022-12-13 12:12:56,879 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:12:56,879 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 302 transitions. [2022-12-13 12:12:56,880 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 100.66666666666667) internal successors, (302), 3 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:12:56,881 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 180.0) internal successors, (720), 4 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:12:56,881 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 180.0) internal successors, (720), 4 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:12:56,882 INFO L175 Difference]: Start difference. First operand has 55 places, 55 transitions, 131 flow. Second operand 3 states and 302 transitions. [2022-12-13 12:12:56,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 87 transitions, 369 flow [2022-12-13 12:12:56,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 87 transitions, 361 flow, removed 4 selfloop flow, removed 0 redundant places. [2022-12-13 12:12:56,884 INFO L231 Difference]: Finished difference. Result has 57 places, 58 transitions, 189 flow [2022-12-13 12:12:56,884 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=180, PETRI_DIFFERENCE_MINUEND_FLOW=115, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=189, PETRI_PLACES=57, PETRI_TRANSITIONS=58} [2022-12-13 12:12:56,885 INFO L288 CegarLoopForPetriNet]: 55 programPoint places, 2 predicate places. [2022-12-13 12:12:56,885 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 58 transitions, 189 flow [2022-12-13 12:12:56,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:12:56,885 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:12:56,885 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2022-12-13 12:12:56,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 12:12:56,885 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-12-13 12:12:56,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:12:56,886 INFO L85 PathProgramCache]: Analyzing trace with hash 1869474651, now seen corresponding path program 1 times [2022-12-13 12:12:56,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:12:56,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526327156] [2022-12-13 12:12:56,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:12:56,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:12:56,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 12:12:56,898 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 12:12:56,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 12:12:56,907 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 12:12:56,907 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 12:12:56,908 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2022-12-13 12:12:56,908 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2022-12-13 12:12:56,908 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2022-12-13 12:12:56,908 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2022-12-13 12:12:56,908 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2022-12-13 12:12:56,908 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2022-12-13 12:12:56,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-13 12:12:56,909 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2022-12-13 12:12:56,909 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 12:12:56,909 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-12-13 12:12:56,936 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-13 12:12:56,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 127 places, 129 transitions, 290 flow [2022-12-13 12:12:56,966 INFO L130 PetriNetUnfolder]: 23/287 cut-off events. [2022-12-13 12:12:56,966 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-12-13 12:12:56,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 310 conditions, 287 events. 23/287 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 895 event pairs, 0 based on Foata normal form. 0/250 useless extension candidates. Maximal degree in co-relation 237. Up to 10 conditions per place. [2022-12-13 12:12:56,968 INFO L82 GeneralOperation]: Start removeDead. Operand has 127 places, 129 transitions, 290 flow [2022-12-13 12:12:56,969 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 127 places, 129 transitions, 290 flow [2022-12-13 12:12:56,969 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 12:12:56,969 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 127 places, 129 transitions, 290 flow [2022-12-13 12:12:56,969 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 127 places, 129 transitions, 290 flow [2022-12-13 12:12:56,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 127 places, 129 transitions, 290 flow [2022-12-13 12:12:56,993 INFO L130 PetriNetUnfolder]: 23/287 cut-off events. [2022-12-13 12:12:56,994 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-12-13 12:12:56,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 310 conditions, 287 events. 23/287 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 895 event pairs, 0 based on Foata normal form. 0/250 useless extension candidates. Maximal degree in co-relation 237. Up to 10 conditions per place. [2022-12-13 12:12:57,000 INFO L119 LiptonReduction]: Number of co-enabled transitions 9248 [2022-12-13 12:12:58,040 INFO L134 LiptonReduction]: Checked pairs total: 36922 [2022-12-13 12:12:58,041 INFO L136 LiptonReduction]: Total number of compositions: 78 [2022-12-13 12:12:58,042 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 12:12:58,043 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;@3ce73081, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 12:12:58,043 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-12-13 12:12:58,045 INFO L130 PetriNetUnfolder]: 3/19 cut-off events. [2022-12-13 12:12:58,045 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 12:12:58,045 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:12:58,045 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 12:12:58,045 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-13 12:12:58,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:12:58,045 INFO L85 PathProgramCache]: Analyzing trace with hash -1108654855, now seen corresponding path program 1 times [2022-12-13 12:12:58,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:12:58,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152392110] [2022-12-13 12:12:58,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:12:58,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:12:58,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:12:58,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:12:58,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:12:58,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152392110] [2022-12-13 12:12:58,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152392110] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:12:58,083 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:12:58,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 12:12:58,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468282195] [2022-12-13 12:12:58,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:12:58,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 12:12:58,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:12:58,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 12:12:58,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 12:12:58,109 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 207 [2022-12-13 12:12:58,110 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 70 transitions, 172 flow. Second operand has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:12:58,110 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:12:58,110 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 207 [2022-12-13 12:12:58,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:13:27,435 INFO L130 PetriNetUnfolder]: 382713/517813 cut-off events. [2022-12-13 12:13:27,435 INFO L131 PetriNetUnfolder]: For 9396/9396 co-relation queries the response was YES. [2022-12-13 12:13:28,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1008788 conditions, 517813 events. 382713/517813 cut-off events. For 9396/9396 co-relation queries the response was YES. Maximal size of possible extension queue 12545. Compared 3880782 event pairs, 209126 based on Foata normal form. 38186/497927 useless extension candidates. Maximal degree in co-relation 81844. Up to 348018 conditions per place. [2022-12-13 12:13:29,391 INFO L137 encePairwiseOnDemand]: 187/207 looper letters, 87 selfloop transitions, 10 changer transitions 0/105 dead transitions. [2022-12-13 12:13:29,391 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 105 transitions, 457 flow [2022-12-13 12:13:29,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 12:13:29,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 12:13:29,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 346 transitions. [2022-12-13 12:13:29,393 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5571658615136876 [2022-12-13 12:13:29,393 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 346 transitions. [2022-12-13 12:13:29,393 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 346 transitions. [2022-12-13 12:13:29,393 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:13:29,393 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 346 transitions. [2022-12-13 12:13:29,394 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 115.33333333333333) internal successors, (346), 3 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:13:29,395 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 207.0) internal successors, (828), 4 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:13:29,396 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 207.0) internal successors, (828), 4 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:13:29,396 INFO L175 Difference]: Start difference. First operand has 69 places, 70 transitions, 172 flow. Second operand 3 states and 346 transitions. [2022-12-13 12:13:29,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 105 transitions, 457 flow [2022-12-13 12:13:29,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 105 transitions, 439 flow, removed 9 selfloop flow, removed 0 redundant places. [2022-12-13 12:13:29,404 INFO L231 Difference]: Finished difference. Result has 68 places, 70 transitions, 230 flow [2022-12-13 12:13:29,405 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=207, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=230, PETRI_PLACES=68, PETRI_TRANSITIONS=70} [2022-12-13 12:13:29,405 INFO L288 CegarLoopForPetriNet]: 69 programPoint places, -1 predicate places. [2022-12-13 12:13:29,405 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 70 transitions, 230 flow [2022-12-13 12:13:29,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:13:29,405 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:13:29,406 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:13:29,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-13 12:13:29,406 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-13 12:13:29,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:13:29,406 INFO L85 PathProgramCache]: Analyzing trace with hash 1404246630, now seen corresponding path program 1 times [2022-12-13 12:13:29,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:13:29,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679161328] [2022-12-13 12:13:29,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:13:29,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:13:29,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:13:29,554 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 12:13:29,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:13:29,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679161328] [2022-12-13 12:13:29,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679161328] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:13:29,555 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:13:29,555 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 12:13:29,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604326607] [2022-12-13 12:13:29,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:13:29,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 12:13:29,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:13:29,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 12:13:29,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 12:13:29,584 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 207 [2022-12-13 12:13:29,585 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 70 transitions, 230 flow. Second operand has 5 states, 5 states have (on average 92.0) internal successors, (460), 5 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:13:29,585 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:13:29,585 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 207 [2022-12-13 12:13:29,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:13:48,773 INFO L381 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([907] L718-->thr1Err0ASSERT_VIOLATIONERROR_FUNCTION: Formula: (not (= (mod v_~c~0_118 4294967296) 1)) InVars {~c~0=v_~c~0_118} OutVars{~c~0=v_~c~0_118} AuxVars[] AssignedVars[][131], [130#true, 136#true, thr1Thread4of4ForFork0InUse, 25#L716-2true, 59#L719true, Black: 132#(= ~c~0 1), 80#thr1EXITtrue, thr1Thread1of4ForFork0InUse, 62#L719true, 36#thr1Err0ASSERT_VIOLATIONERROR_FUNCTIONtrue, thr1Thread2of4ForFork0InUse, thr1Thread3of4ForFork0InUse]) [2022-12-13 12:13:48,773 INFO L383 tUnfolder$Statistics]: this new event has 49 ancestors and is cut-off event [2022-12-13 12:13:48,773 INFO L386 tUnfolder$Statistics]: existing Event has 49 ancestors and is cut-off event [2022-12-13 12:13:48,773 INFO L386 tUnfolder$Statistics]: existing Event has 49 ancestors and is cut-off event [2022-12-13 12:13:48,773 INFO L386 tUnfolder$Statistics]: existing Event has 49 ancestors and is cut-off event [2022-12-13 12:13:48,943 INFO L381 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([907] L718-->thr1Err0ASSERT_VIOLATIONERROR_FUNCTION: Formula: (not (= (mod v_~c~0_118 4294967296) 1)) InVars {~c~0=v_~c~0_118} OutVars{~c~0=v_~c~0_118} AuxVars[] AssignedVars[][131], [136#true, 130#true, thr1Thread4of4ForFork0InUse, 59#L719true, Black: 132#(= ~c~0 1), 80#thr1EXITtrue, thr1Thread1of4ForFork0InUse, 62#L719true, 84#thr1EXITtrue, 36#thr1Err0ASSERT_VIOLATIONERROR_FUNCTIONtrue, thr1Thread2of4ForFork0InUse, thr1Thread3of4ForFork0InUse]) [2022-12-13 12:13:48,943 INFO L383 tUnfolder$Statistics]: this new event has 50 ancestors and is cut-off event [2022-12-13 12:13:48,943 INFO L386 tUnfolder$Statistics]: existing Event has 50 ancestors and is cut-off event [2022-12-13 12:13:48,943 INFO L386 tUnfolder$Statistics]: existing Event has 50 ancestors and is cut-off event [2022-12-13 12:13:48,943 INFO L386 tUnfolder$Statistics]: existing Event has 50 ancestors and is cut-off event [2022-12-13 12:13:49,066 INFO L381 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([872] L719-->L716-2: Formula: (and (= |v_thr1Thread3of4ForFork0_#res#1.base_5| 0) (= v_~s~0_90 (+ v_~s~0_91 1)) (= |v_thr1Thread3of4ForFork0_#res#1.offset_5| 0)) InVars {~s~0=v_~s~0_91} OutVars{thr1Thread3of4ForFork0_#res#1.offset=|v_thr1Thread3of4ForFork0_#res#1.offset_5|, thr1Thread3of4ForFork0_#t~post5#1=|v_thr1Thread3of4ForFork0_#t~post5#1_5|, thr1Thread3of4ForFork0_#res#1.base=|v_thr1Thread3of4ForFork0_#res#1.base_5|, ~s~0=v_~s~0_90} AuxVars[] AssignedVars[thr1Thread3of4ForFork0_#res#1.offset, thr1Thread3of4ForFork0_#t~post5#1, thr1Thread3of4ForFork0_#res#1.base, ~s~0][124], [130#true, thr1Thread4of4ForFork0InUse, 136#true, 25#L716-2true, 59#L719true, Black: 132#(= ~c~0 1), 80#thr1EXITtrue, thr1Thread1of4ForFork0InUse, 62#L719true, 45#L716-2true, thr1Thread2of4ForFork0InUse, thr1Thread3of4ForFork0InUse]) [2022-12-13 12:13:49,066 INFO L383 tUnfolder$Statistics]: this new event has 51 ancestors and is cut-off event [2022-12-13 12:13:49,066 INFO L386 tUnfolder$Statistics]: existing Event has 51 ancestors and is cut-off event [2022-12-13 12:13:49,066 INFO L386 tUnfolder$Statistics]: existing Event has 51 ancestors and is cut-off event [2022-12-13 12:13:49,066 INFO L386 tUnfolder$Statistics]: existing Event has 51 ancestors and is cut-off event [2022-12-13 12:13:49,275 INFO L381 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([872] L719-->L716-2: Formula: (and (= |v_thr1Thread3of4ForFork0_#res#1.base_5| 0) (= v_~s~0_90 (+ v_~s~0_91 1)) (= |v_thr1Thread3of4ForFork0_#res#1.offset_5| 0)) InVars {~s~0=v_~s~0_91} OutVars{thr1Thread3of4ForFork0_#res#1.offset=|v_thr1Thread3of4ForFork0_#res#1.offset_5|, thr1Thread3of4ForFork0_#t~post5#1=|v_thr1Thread3of4ForFork0_#t~post5#1_5|, thr1Thread3of4ForFork0_#res#1.base=|v_thr1Thread3of4ForFork0_#res#1.base_5|, ~s~0=v_~s~0_90} AuxVars[] AssignedVars[thr1Thread3of4ForFork0_#res#1.offset, thr1Thread3of4ForFork0_#t~post5#1, thr1Thread3of4ForFork0_#res#1.base, ~s~0][124], [thr1Thread4of4ForFork0InUse, 136#true, 130#true, 59#L719true, Black: 132#(= ~c~0 1), 80#thr1EXITtrue, 84#thr1EXITtrue, thr1Thread1of4ForFork0InUse, 62#L719true, 45#L716-2true, thr1Thread2of4ForFork0InUse, thr1Thread3of4ForFork0InUse]) [2022-12-13 12:13:49,275 INFO L383 tUnfolder$Statistics]: this new event has 52 ancestors and is cut-off event [2022-12-13 12:13:49,275 INFO L386 tUnfolder$Statistics]: existing Event has 52 ancestors and is cut-off event [2022-12-13 12:13:49,276 INFO L386 tUnfolder$Statistics]: existing Event has 52 ancestors and is cut-off event [2022-12-13 12:13:49,276 INFO L386 tUnfolder$Statistics]: existing Event has 52 ancestors and is cut-off event [2022-12-13 12:13:49,354 INFO L130 PetriNetUnfolder]: 214012/314249 cut-off events. [2022-12-13 12:13:49,354 INFO L131 PetriNetUnfolder]: For 64987/82854 co-relation queries the response was YES. [2022-12-13 12:13:50,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 690337 conditions, 314249 events. 214012/314249 cut-off events. For 64987/82854 co-relation queries the response was YES. Maximal size of possible extension queue 10484. Compared 2732291 event pairs, 98760 based on Foata normal form. 11371/278583 useless extension candidates. Maximal degree in co-relation 621105. Up to 229101 conditions per place. [2022-12-13 12:13:51,012 INFO L137 encePairwiseOnDemand]: 194/207 looper letters, 84 selfloop transitions, 25 changer transitions 0/137 dead transitions. [2022-12-13 12:13:51,012 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 137 transitions, 622 flow [2022-12-13 12:13:51,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 12:13:51,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 12:13:51,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 560 transitions. [2022-12-13 12:13:51,014 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5410628019323671 [2022-12-13 12:13:51,014 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 560 transitions. [2022-12-13 12:13:51,014 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 560 transitions. [2022-12-13 12:13:51,015 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:13:51,015 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 560 transitions. [2022-12-13 12:13:51,016 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 112.0) internal successors, (560), 5 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:13:51,018 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 207.0) internal successors, (1242), 6 states have internal predecessors, (1242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:13:51,018 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 207.0) internal successors, (1242), 6 states have internal predecessors, (1242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:13:51,018 INFO L175 Difference]: Start difference. First operand has 68 places, 70 transitions, 230 flow. Second operand 5 states and 560 transitions. [2022-12-13 12:13:51,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 137 transitions, 622 flow [2022-12-13 12:13:51,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 137 transitions, 602 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 12:13:51,150 INFO L231 Difference]: Finished difference. Result has 72 places, 94 transitions, 357 flow [2022-12-13 12:13:51,150 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=207, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=357, PETRI_PLACES=72, PETRI_TRANSITIONS=94} [2022-12-13 12:13:51,151 INFO L288 CegarLoopForPetriNet]: 69 programPoint places, 3 predicate places. [2022-12-13 12:13:51,151 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 94 transitions, 357 flow [2022-12-13 12:13:51,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 92.0) internal successors, (460), 5 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:13:51,151 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:13:51,151 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:13:51,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-13 12:13:51,151 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-13 12:13:51,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:13:51,152 INFO L85 PathProgramCache]: Analyzing trace with hash -266781248, now seen corresponding path program 2 times [2022-12-13 12:13:51,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:13:51,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636949677] [2022-12-13 12:13:51,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:13:51,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:13:51,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:13:51,285 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 12:13:51,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:13:51,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636949677] [2022-12-13 12:13:51,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636949677] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:13:51,286 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:13:51,286 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 12:13:51,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660962825] [2022-12-13 12:13:51,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:13:51,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 12:13:51,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:13:51,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 12:13:51,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 12:13:51,312 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 207 [2022-12-13 12:13:51,313 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 94 transitions, 357 flow. Second operand has 5 states, 5 states have (on average 91.0) internal successors, (455), 5 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:13:51,313 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:13:51,313 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 207 [2022-12-13 12:13:51,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:14:10,908 INFO L130 PetriNetUnfolder]: 214954/315384 cut-off events. [2022-12-13 12:14:10,908 INFO L131 PetriNetUnfolder]: For 97105/128498 co-relation queries the response was YES. [2022-12-13 12:14:11,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 729746 conditions, 315384 events. 214954/315384 cut-off events. For 97105/128498 co-relation queries the response was YES. Maximal size of possible extension queue 10574. Compared 2740638 event pairs, 99275 based on Foata normal form. 11666/290000 useless extension candidates. Maximal degree in co-relation 657352. Up to 229701 conditions per place. [2022-12-13 12:14:13,010 INFO L137 encePairwiseOnDemand]: 195/207 looper letters, 91 selfloop transitions, 24 changer transitions 0/143 dead transitions. [2022-12-13 12:14:13,010 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 143 transitions, 739 flow [2022-12-13 12:14:13,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 12:14:13,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 12:14:13,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 552 transitions. [2022-12-13 12:14:13,012 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2022-12-13 12:14:13,013 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 552 transitions. [2022-12-13 12:14:13,013 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 552 transitions. [2022-12-13 12:14:13,013 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:14:13,013 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 552 transitions. [2022-12-13 12:14:13,015 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 110.4) internal successors, (552), 5 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:14:13,017 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 207.0) internal successors, (1242), 6 states have internal predecessors, (1242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:14:13,018 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 207.0) internal successors, (1242), 6 states have internal predecessors, (1242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:14:13,018 INFO L175 Difference]: Start difference. First operand has 72 places, 94 transitions, 357 flow. Second operand 5 states and 552 transitions. [2022-12-13 12:14:13,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 143 transitions, 739 flow [2022-12-13 12:14:13,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 143 transitions, 739 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 12:14:13,048 INFO L231 Difference]: Finished difference. Result has 77 places, 102 transitions, 464 flow [2022-12-13 12:14:13,048 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=207, PETRI_DIFFERENCE_MINUEND_FLOW=357, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=464, PETRI_PLACES=77, PETRI_TRANSITIONS=102} [2022-12-13 12:14:13,049 INFO L288 CegarLoopForPetriNet]: 69 programPoint places, 8 predicate places. [2022-12-13 12:14:13,049 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 102 transitions, 464 flow [2022-12-13 12:14:13,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 91.0) internal successors, (455), 5 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:14:13,049 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:14:13,049 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:14:13,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-13 12:14:13,050 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-13 12:14:13,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:14:13,050 INFO L85 PathProgramCache]: Analyzing trace with hash 1047939497, now seen corresponding path program 1 times [2022-12-13 12:14:13,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:14:13,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019236073] [2022-12-13 12:14:13,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:14:13,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:14:13,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:14:13,242 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 12:14:13,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:14:13,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019236073] [2022-12-13 12:14:13,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019236073] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:14:13,242 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:14:13,242 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 12:14:13,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845965402] [2022-12-13 12:14:13,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:14:13,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 12:14:13,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:14:13,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 12:14:13,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 12:14:13,267 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 207 [2022-12-13 12:14:13,268 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 102 transitions, 464 flow. Second operand has 5 states, 5 states have (on average 92.2) internal successors, (461), 5 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:14:13,268 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:14:13,268 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 207 [2022-12-13 12:14:13,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:14:34,096 INFO L381 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([907] L718-->thr1Err0ASSERT_VIOLATIONERROR_FUNCTION: Formula: (not (= (mod v_~c~0_118 4294967296) 1)) InVars {~c~0=v_~c~0_118} OutVars{~c~0=v_~c~0_118} AuxVars[] AssignedVars[][143], [thr1Thread4of4ForFork0InUse, 59#L719true, Black: 132#(= ~c~0 1), 80#thr1EXITtrue, 62#L719true, 151#true, 36#thr1Err0ASSERT_VIOLATIONERROR_FUNCTIONtrue, Black: 139#(and (<= ~t~0 1) (<= 1 ~t~0) (= ~s~0 0)), Black: 140#(and (not (<= (+ (div ~s~0 4294967296) 1) (div (select (select |#memory_int| |thr1Thread1of4ForFork0_~#l~0#1.base|) |thr1Thread1of4ForFork0_~#l~0#1.offset|) 4294967296))) (<= 1 (select (select |#memory_int| |thr1Thread1of4ForFork0_~#l~0#1.base|) |thr1Thread1of4ForFork0_~#l~0#1.offset|)) (= ~s~0 0)), 136#true, 25#L716-2true, Black: 148#(and (not (<= (+ (div ~s~0 4294967296) 1) (div (select (select |#memory_int| |ULTIMATE.start_thr1_~#l~0#1.base|) |ULTIMATE.start_thr1_~#l~0#1.offset|) 4294967296))) (<= 1 (select (select |#memory_int| |ULTIMATE.start_thr1_~#l~0#1.base|) |ULTIMATE.start_thr1_~#l~0#1.offset|)) (= ~s~0 0)), thr1Thread1of4ForFork0InUse, thr1Thread2of4ForFork0InUse, 144#true, thr1Thread3of4ForFork0InUse]) [2022-12-13 12:14:34,096 INFO L383 tUnfolder$Statistics]: this new event has 49 ancestors and is cut-off event [2022-12-13 12:14:34,097 INFO L386 tUnfolder$Statistics]: existing Event has 49 ancestors and is cut-off event [2022-12-13 12:14:34,097 INFO L386 tUnfolder$Statistics]: existing Event has 49 ancestors and is cut-off event [2022-12-13 12:14:34,097 INFO L386 tUnfolder$Statistics]: existing Event has 49 ancestors and is cut-off event [2022-12-13 12:14:34,288 INFO L381 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([907] L718-->thr1Err0ASSERT_VIOLATIONERROR_FUNCTION: Formula: (not (= (mod v_~c~0_118 4294967296) 1)) InVars {~c~0=v_~c~0_118} OutVars{~c~0=v_~c~0_118} AuxVars[] AssignedVars[][143], [thr1Thread4of4ForFork0InUse, 59#L719true, Black: 132#(= ~c~0 1), 80#thr1EXITtrue, 84#thr1EXITtrue, 62#L719true, 151#true, 36#thr1Err0ASSERT_VIOLATIONERROR_FUNCTIONtrue, Black: 139#(and (<= ~t~0 1) (<= 1 ~t~0) (= ~s~0 0)), Black: 140#(and (not (<= (+ (div ~s~0 4294967296) 1) (div (select (select |#memory_int| |thr1Thread1of4ForFork0_~#l~0#1.base|) |thr1Thread1of4ForFork0_~#l~0#1.offset|) 4294967296))) (<= 1 (select (select |#memory_int| |thr1Thread1of4ForFork0_~#l~0#1.base|) |thr1Thread1of4ForFork0_~#l~0#1.offset|)) (= ~s~0 0)), 136#true, Black: 148#(and (not (<= (+ (div ~s~0 4294967296) 1) (div (select (select |#memory_int| |ULTIMATE.start_thr1_~#l~0#1.base|) |ULTIMATE.start_thr1_~#l~0#1.offset|) 4294967296))) (<= 1 (select (select |#memory_int| |ULTIMATE.start_thr1_~#l~0#1.base|) |ULTIMATE.start_thr1_~#l~0#1.offset|)) (= ~s~0 0)), thr1Thread1of4ForFork0InUse, thr1Thread2of4ForFork0InUse, 144#true, thr1Thread3of4ForFork0InUse]) [2022-12-13 12:14:34,288 INFO L383 tUnfolder$Statistics]: this new event has 50 ancestors and is cut-off event [2022-12-13 12:14:34,289 INFO L386 tUnfolder$Statistics]: existing Event has 50 ancestors and is cut-off event [2022-12-13 12:14:34,289 INFO L386 tUnfolder$Statistics]: existing Event has 50 ancestors and is cut-off event [2022-12-13 12:14:34,289 INFO L386 tUnfolder$Statistics]: existing Event has 50 ancestors and is cut-off event [2022-12-13 12:14:34,428 INFO L381 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([872] L719-->L716-2: Formula: (and (= |v_thr1Thread3of4ForFork0_#res#1.base_5| 0) (= v_~s~0_90 (+ v_~s~0_91 1)) (= |v_thr1Thread3of4ForFork0_#res#1.offset_5| 0)) InVars {~s~0=v_~s~0_91} OutVars{thr1Thread3of4ForFork0_#res#1.offset=|v_thr1Thread3of4ForFork0_#res#1.offset_5|, thr1Thread3of4ForFork0_#t~post5#1=|v_thr1Thread3of4ForFork0_#t~post5#1_5|, thr1Thread3of4ForFork0_#res#1.base=|v_thr1Thread3of4ForFork0_#res#1.base_5|, ~s~0=v_~s~0_90} AuxVars[] AssignedVars[thr1Thread3of4ForFork0_#res#1.offset, thr1Thread3of4ForFork0_#t~post5#1, thr1Thread3of4ForFork0_#res#1.base, ~s~0][130], [thr1Thread4of4ForFork0InUse, 59#L719true, Black: 132#(= ~c~0 1), 80#thr1EXITtrue, 62#L719true, 151#true, Black: 139#(and (<= ~t~0 1) (<= 1 ~t~0) (= ~s~0 0)), Black: 140#(and (not (<= (+ (div ~s~0 4294967296) 1) (div (select (select |#memory_int| |thr1Thread1of4ForFork0_~#l~0#1.base|) |thr1Thread1of4ForFork0_~#l~0#1.offset|) 4294967296))) (<= 1 (select (select |#memory_int| |thr1Thread1of4ForFork0_~#l~0#1.base|) |thr1Thread1of4ForFork0_~#l~0#1.offset|)) (= ~s~0 0)), 136#true, 25#L716-2true, Black: 148#(and (not (<= (+ (div ~s~0 4294967296) 1) (div (select (select |#memory_int| |ULTIMATE.start_thr1_~#l~0#1.base|) |ULTIMATE.start_thr1_~#l~0#1.offset|) 4294967296))) (<= 1 (select (select |#memory_int| |ULTIMATE.start_thr1_~#l~0#1.base|) |ULTIMATE.start_thr1_~#l~0#1.offset|)) (= ~s~0 0)), thr1Thread1of4ForFork0InUse, 45#L716-2true, thr1Thread2of4ForFork0InUse, 144#true, thr1Thread3of4ForFork0InUse]) [2022-12-13 12:14:34,429 INFO L383 tUnfolder$Statistics]: this new event has 51 ancestors and is cut-off event [2022-12-13 12:14:34,429 INFO L386 tUnfolder$Statistics]: existing Event has 51 ancestors and is cut-off event [2022-12-13 12:14:34,429 INFO L386 tUnfolder$Statistics]: existing Event has 51 ancestors and is cut-off event [2022-12-13 12:14:34,429 INFO L386 tUnfolder$Statistics]: existing Event has 51 ancestors and is cut-off event [2022-12-13 12:14:34,511 INFO L381 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([872] L719-->L716-2: Formula: (and (= |v_thr1Thread3of4ForFork0_#res#1.base_5| 0) (= v_~s~0_90 (+ v_~s~0_91 1)) (= |v_thr1Thread3of4ForFork0_#res#1.offset_5| 0)) InVars {~s~0=v_~s~0_91} OutVars{thr1Thread3of4ForFork0_#res#1.offset=|v_thr1Thread3of4ForFork0_#res#1.offset_5|, thr1Thread3of4ForFork0_#t~post5#1=|v_thr1Thread3of4ForFork0_#t~post5#1_5|, thr1Thread3of4ForFork0_#res#1.base=|v_thr1Thread3of4ForFork0_#res#1.base_5|, ~s~0=v_~s~0_90} AuxVars[] AssignedVars[thr1Thread3of4ForFork0_#res#1.offset, thr1Thread3of4ForFork0_#t~post5#1, thr1Thread3of4ForFork0_#res#1.base, ~s~0][130], [thr1Thread4of4ForFork0InUse, 59#L719true, Black: 132#(= ~c~0 1), 80#thr1EXITtrue, 84#thr1EXITtrue, 62#L719true, 151#true, Black: 139#(and (<= ~t~0 1) (<= 1 ~t~0) (= ~s~0 0)), Black: 140#(and (not (<= (+ (div ~s~0 4294967296) 1) (div (select (select |#memory_int| |thr1Thread1of4ForFork0_~#l~0#1.base|) |thr1Thread1of4ForFork0_~#l~0#1.offset|) 4294967296))) (<= 1 (select (select |#memory_int| |thr1Thread1of4ForFork0_~#l~0#1.base|) |thr1Thread1of4ForFork0_~#l~0#1.offset|)) (= ~s~0 0)), 136#true, Black: 148#(and (not (<= (+ (div ~s~0 4294967296) 1) (div (select (select |#memory_int| |ULTIMATE.start_thr1_~#l~0#1.base|) |ULTIMATE.start_thr1_~#l~0#1.offset|) 4294967296))) (<= 1 (select (select |#memory_int| |ULTIMATE.start_thr1_~#l~0#1.base|) |ULTIMATE.start_thr1_~#l~0#1.offset|)) (= ~s~0 0)), thr1Thread1of4ForFork0InUse, 45#L716-2true, thr1Thread2of4ForFork0InUse, 144#true, thr1Thread3of4ForFork0InUse]) [2022-12-13 12:14:34,511 INFO L383 tUnfolder$Statistics]: this new event has 52 ancestors and is cut-off event [2022-12-13 12:14:34,511 INFO L386 tUnfolder$Statistics]: existing Event has 52 ancestors and is cut-off event [2022-12-13 12:14:34,511 INFO L386 tUnfolder$Statistics]: existing Event has 52 ancestors and is cut-off event [2022-12-13 12:14:34,511 INFO L386 tUnfolder$Statistics]: existing Event has 52 ancestors and is cut-off event [2022-12-13 12:14:34,881 INFO L130 PetriNetUnfolder]: 214920/316110 cut-off events. [2022-12-13 12:14:34,881 INFO L131 PetriNetUnfolder]: For 191205/234678 co-relation queries the response was YES. [2022-12-13 12:14:35,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 789285 conditions, 316110 events. 214920/316110 cut-off events. For 191205/234678 co-relation queries the response was YES. Maximal size of possible extension queue 10728. Compared 2759340 event pairs, 98036 based on Foata normal form. 11030/295118 useless extension candidates. Maximal degree in co-relation 712359. Up to 227292 conditions per place. [2022-12-13 12:14:36,861 INFO L137 encePairwiseOnDemand]: 194/207 looper letters, 101 selfloop transitions, 25 changer transitions 0/154 dead transitions. [2022-12-13 12:14:36,861 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 154 transitions, 902 flow [2022-12-13 12:14:36,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 12:14:36,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 12:14:36,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 560 transitions. [2022-12-13 12:14:36,863 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5410628019323671 [2022-12-13 12:14:36,863 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 560 transitions. [2022-12-13 12:14:36,863 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 560 transitions. [2022-12-13 12:14:36,863 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:14:36,863 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 560 transitions. [2022-12-13 12:14:36,864 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 112.0) internal successors, (560), 5 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:14:36,866 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 207.0) internal successors, (1242), 6 states have internal predecessors, (1242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:14:36,866 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 207.0) internal successors, (1242), 6 states have internal predecessors, (1242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:14:36,866 INFO L175 Difference]: Start difference. First operand has 77 places, 102 transitions, 464 flow. Second operand 5 states and 560 transitions. [2022-12-13 12:14:36,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 154 transitions, 902 flow [2022-12-13 12:14:36,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 154 transitions, 847 flow, removed 8 selfloop flow, removed 3 redundant places. [2022-12-13 12:14:36,911 INFO L231 Difference]: Finished difference. Result has 79 places, 111 transitions, 537 flow [2022-12-13 12:14:36,911 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=207, PETRI_DIFFERENCE_MINUEND_FLOW=409, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=537, PETRI_PLACES=79, PETRI_TRANSITIONS=111} [2022-12-13 12:14:36,912 INFO L288 CegarLoopForPetriNet]: 69 programPoint places, 10 predicate places. [2022-12-13 12:14:36,912 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 111 transitions, 537 flow [2022-12-13 12:14:36,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 92.2) internal successors, (461), 5 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:14:36,912 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:14:36,913 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2022-12-13 12:14:36,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-13 12:14:36,913 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-13 12:14:36,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:14:36,913 INFO L85 PathProgramCache]: Analyzing trace with hash 1417311024, now seen corresponding path program 1 times [2022-12-13 12:14:36,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:14:36,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32295895] [2022-12-13 12:14:36,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:14:36,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:14:36,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 12:14:36,926 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 12:14:36,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 12:14:36,937 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 12:14:36,938 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 12:14:36,938 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2022-12-13 12:14:36,938 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2022-12-13 12:14:36,938 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (4 of 7 remaining) [2022-12-13 12:14:36,938 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2022-12-13 12:14:36,938 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2022-12-13 12:14:36,938 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2022-12-13 12:14:36,939 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2022-12-13 12:14:36,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-13 12:14:36,939 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1] [2022-12-13 12:14:36,939 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 12:14:36,939 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-12-13 12:14:36,989 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-13 12:14:36,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 145 places, 147 transitions, 339 flow [2022-12-13 12:14:37,028 INFO L130 PetriNetUnfolder]: 28/345 cut-off events. [2022-12-13 12:14:37,028 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-12-13 12:14:37,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 376 conditions, 345 events. 28/345 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 1130 event pairs, 0 based on Foata normal form. 0/300 useless extension candidates. Maximal degree in co-relation 300. Up to 12 conditions per place. [2022-12-13 12:14:37,030 INFO L82 GeneralOperation]: Start removeDead. Operand has 145 places, 147 transitions, 339 flow [2022-12-13 12:14:37,032 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 145 places, 147 transitions, 339 flow [2022-12-13 12:14:37,032 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 12:14:37,033 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 145 places, 147 transitions, 339 flow [2022-12-13 12:14:37,033 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 145 places, 147 transitions, 339 flow [2022-12-13 12:14:37,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 145 places, 147 transitions, 339 flow [2022-12-13 12:14:37,066 INFO L130 PetriNetUnfolder]: 28/345 cut-off events. [2022-12-13 12:14:37,067 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-12-13 12:14:37,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 376 conditions, 345 events. 28/345 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 1130 event pairs, 0 based on Foata normal form. 0/300 useless extension candidates. Maximal degree in co-relation 300. Up to 12 conditions per place. [2022-12-13 12:14:37,074 INFO L119 LiptonReduction]: Number of co-enabled transitions 13090 [2022-12-13 12:14:38,170 INFO L134 LiptonReduction]: Checked pairs total: 52286 [2022-12-13 12:14:38,170 INFO L136 LiptonReduction]: Total number of compositions: 86 [2022-12-13 12:14:38,172 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 12:14:38,172 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;@3ce73081, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 12:14:38,172 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2022-12-13 12:14:38,174 INFO L130 PetriNetUnfolder]: 3/19 cut-off events. [2022-12-13 12:14:38,174 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 12:14:38,174 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:14:38,175 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 12:14:38,175 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2022-12-13 12:14:38,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:14:38,175 INFO L85 PathProgramCache]: Analyzing trace with hash 2021024951, now seen corresponding path program 1 times [2022-12-13 12:14:38,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:14:38,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122325262] [2022-12-13 12:14:38,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:14:38,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:14:38,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:14:38,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:14:38,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:14:38,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122325262] [2022-12-13 12:14:38,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122325262] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:14:38,211 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:14:38,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 12:14:38,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655367324] [2022-12-13 12:14:38,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:14:38,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 12:14:38,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:14:38,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 12:14:38,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 12:14:38,240 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 233 [2022-12-13 12:14:38,240 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 83 transitions, 211 flow. Second operand has 3 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:14:38,240 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:14:38,241 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 233 [2022-12-13 12:14:38,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand