./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/fib_unsafe-11.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_843c4a14-37ea-4c63-a274-2cf5d1c3ec69/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_843c4a14-37ea-4c63-a274-2cf5d1c3ec69/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_843c4a14-37ea-4c63-a274-2cf5d1c3ec69/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_843c4a14-37ea-4c63-a274-2cf5d1c3ec69/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/fib_unsafe-11.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_843c4a14-37ea-4c63-a274-2cf5d1c3ec69/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_843c4a14-37ea-4c63-a274-2cf5d1c3ec69/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 5b16c68af06359cf155927d2335a825cd179e6a83a999e1ead7a6952268e92c6 --- 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 11:10:32,577 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 11:10:32,579 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 11:10:32,592 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 11:10:32,593 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 11:10:32,593 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 11:10:32,594 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 11:10:32,595 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 11:10:32,596 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 11:10:32,597 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 11:10:32,598 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 11:10:32,598 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 11:10:32,599 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 11:10:32,599 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 11:10:32,600 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 11:10:32,601 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 11:10:32,601 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 11:10:32,602 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 11:10:32,603 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 11:10:32,604 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 11:10:32,605 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 11:10:32,606 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 11:10:32,607 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 11:10:32,608 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 11:10:32,610 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 11:10:32,610 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 11:10:32,610 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 11:10:32,611 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 11:10:32,611 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 11:10:32,612 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 11:10:32,612 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 11:10:32,613 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 11:10:32,613 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 11:10:32,614 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 11:10:32,615 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 11:10:32,615 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 11:10:32,615 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 11:10:32,615 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 11:10:32,616 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 11:10:32,616 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 11:10:32,617 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 11:10:32,618 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_843c4a14-37ea-4c63-a274-2cf5d1c3ec69/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 11:10:32,634 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 11:10:32,634 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 11:10:32,634 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 11:10:32,634 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 11:10:32,635 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 11:10:32,635 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 11:10:32,636 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 11:10:32,636 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 11:10:32,636 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 11:10:32,636 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 11:10:32,636 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 11:10:32,636 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 11:10:32,636 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 11:10:32,636 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 11:10:32,637 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 11:10:32,637 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 11:10:32,637 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 11:10:32,637 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 11:10:32,637 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 11:10:32,637 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 11:10:32,637 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 11:10:32,637 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 11:10:32,638 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 11:10:32,638 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 11:10:32,638 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 11:10:32,638 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 11:10:32,638 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 11:10:32,638 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 11:10:32,638 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 11:10:32,638 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 11:10:32,639 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 11:10:32,639 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 11:10:32,639 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 11:10:32,639 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 11:10:32,639 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 11:10:32,639 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_843c4a14-37ea-4c63-a274-2cf5d1c3ec69/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_843c4a14-37ea-4c63-a274-2cf5d1c3ec69/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5b16c68af06359cf155927d2335a825cd179e6a83a999e1ead7a6952268e92c6 [2022-12-13 11:10:32,830 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 11:10:32,850 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 11:10:32,853 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 11:10:32,854 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 11:10:32,854 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 11:10:32,855 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_843c4a14-37ea-4c63-a274-2cf5d1c3ec69/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/pthread/fib_unsafe-11.i [2022-12-13 11:10:35,503 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 11:10:35,683 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 11:10:35,684 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_843c4a14-37ea-4c63-a274-2cf5d1c3ec69/sv-benchmarks/c/pthread/fib_unsafe-11.i [2022-12-13 11:10:35,692 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_843c4a14-37ea-4c63-a274-2cf5d1c3ec69/bin/uautomizer-uyxdKDjOR8/data/ec187a9c0/e093051c8fdf41d39c6c3a9730e03f79/FLAGb3753186a [2022-12-13 11:10:35,705 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_843c4a14-37ea-4c63-a274-2cf5d1c3ec69/bin/uautomizer-uyxdKDjOR8/data/ec187a9c0/e093051c8fdf41d39c6c3a9730e03f79 [2022-12-13 11:10:35,707 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 11:10:35,708 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 11:10:35,709 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 11:10:35,709 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 11:10:35,712 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 11:10:35,712 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 11:10:35" (1/1) ... [2022-12-13 11:10:35,713 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ff650b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:10:35, skipping insertion in model container [2022-12-13 11:10:35,713 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 11:10:35" (1/1) ... [2022-12-13 11:10:35,719 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 11:10:35,751 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 11:10:35,948 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_843c4a14-37ea-4c63-a274-2cf5d1c3ec69/sv-benchmarks/c/pthread/fib_unsafe-11.i[30243,30256] [2022-12-13 11:10:35,956 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 11:10:35,957 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 11:10:35,959 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 11:10:35,960 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 11:10:35,962 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 11:10:35,962 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 11:10:35,963 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 11:10:35,963 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 11:10:35,965 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 11:10:35,966 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 11:10:35,967 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 11:10:35,974 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 11:10:35,998 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_843c4a14-37ea-4c63-a274-2cf5d1c3ec69/sv-benchmarks/c/pthread/fib_unsafe-11.i[30243,30256] [2022-12-13 11:10:35,999 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 11:10:35,999 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 11:10:36,000 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 11:10:36,000 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 11:10:36,002 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 11:10:36,002 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 11:10:36,003 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 11:10:36,003 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 11:10:36,004 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 11:10:36,004 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 11:10:36,005 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 11:10:36,024 INFO L208 MainTranslator]: Completed translation [2022-12-13 11:10:36,025 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:10:36 WrapperNode [2022-12-13 11:10:36,025 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 11:10:36,026 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 11:10:36,026 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 11:10:36,026 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 11:10:36,031 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:10:36" (1/1) ... [2022-12-13 11:10:36,040 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:10:36" (1/1) ... [2022-12-13 11:10:36,053 INFO L138 Inliner]: procedures = 165, calls = 28, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 76 [2022-12-13 11:10:36,054 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 11:10:36,054 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 11:10:36,054 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 11:10:36,054 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 11:10:36,061 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:10:36" (1/1) ... [2022-12-13 11:10:36,061 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:10:36" (1/1) ... [2022-12-13 11:10:36,063 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:10:36" (1/1) ... [2022-12-13 11:10:36,063 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:10:36" (1/1) ... [2022-12-13 11:10:36,066 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:10:36" (1/1) ... [2022-12-13 11:10:36,068 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:10:36" (1/1) ... [2022-12-13 11:10:36,069 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:10:36" (1/1) ... [2022-12-13 11:10:36,070 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:10:36" (1/1) ... [2022-12-13 11:10:36,072 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 11:10:36,072 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 11:10:36,073 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 11:10:36,073 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 11:10:36,073 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:10:36" (1/1) ... [2022-12-13 11:10:36,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 11:10:36,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_843c4a14-37ea-4c63-a274-2cf5d1c3ec69/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:10:36,098 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_843c4a14-37ea-4c63-a274-2cf5d1c3ec69/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 11:10:36,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_843c4a14-37ea-4c63-a274-2cf5d1c3ec69/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 11:10:36,131 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-12-13 11:10:36,131 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-12-13 11:10:36,131 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-12-13 11:10:36,131 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-12-13 11:10:36,131 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 11:10:36,131 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-13 11:10:36,131 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 11:10:36,131 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 11:10:36,131 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 11:10:36,131 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 11:10:36,132 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-13 11:10:36,132 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 11:10:36,132 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 11:10:36,133 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 11:10:36,228 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 11:10:36,230 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 11:10:36,381 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 11:10:36,387 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 11:10:36,387 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-13 11:10:36,389 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 11:10:36 BoogieIcfgContainer [2022-12-13 11:10:36,389 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 11:10:36,391 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 11:10:36,391 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 11:10:36,393 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 11:10:36,394 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 11:10:35" (1/3) ... [2022-12-13 11:10:36,394 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76369df3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 11:10:36, skipping insertion in model container [2022-12-13 11:10:36,394 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:10:36" (2/3) ... [2022-12-13 11:10:36,394 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76369df3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 11:10:36, skipping insertion in model container [2022-12-13 11:10:36,395 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 11:10:36" (3/3) ... [2022-12-13 11:10:36,396 INFO L112 eAbstractionObserver]: Analyzing ICFG fib_unsafe-11.i [2022-12-13 11:10:36,403 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-12-13 11:10:36,411 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 11:10:36,411 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-13 11:10:36,412 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 11:10:36,455 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-13 11:10:36,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 101 places, 101 transitions, 212 flow [2022-12-13 11:10:36,521 INFO L130 PetriNetUnfolder]: 7/99 cut-off events. [2022-12-13 11:10:36,522 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 11:10:36,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106 conditions, 99 events. 7/99 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 70 event pairs, 0 based on Foata normal form. 0/91 useless extension candidates. Maximal degree in co-relation 70. Up to 2 conditions per place. [2022-12-13 11:10:36,528 INFO L82 GeneralOperation]: Start removeDead. Operand has 101 places, 101 transitions, 212 flow [2022-12-13 11:10:36,531 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 99 places, 99 transitions, 204 flow [2022-12-13 11:10:36,534 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 11:10:36,542 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 99 places, 99 transitions, 204 flow [2022-12-13 11:10:36,544 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 99 places, 99 transitions, 204 flow [2022-12-13 11:10:36,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 99 places, 99 transitions, 204 flow [2022-12-13 11:10:36,576 INFO L130 PetriNetUnfolder]: 7/99 cut-off events. [2022-12-13 11:10:36,576 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 11:10:36,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106 conditions, 99 events. 7/99 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 70 event pairs, 0 based on Foata normal form. 0/91 useless extension candidates. Maximal degree in co-relation 70. Up to 2 conditions per place. [2022-12-13 11:10:36,578 INFO L119 LiptonReduction]: Number of co-enabled transitions 2134 [2022-12-13 11:10:38,705 INFO L134 LiptonReduction]: Checked pairs total: 1542 [2022-12-13 11:10:38,706 INFO L136 LiptonReduction]: Total number of compositions: 97 [2022-12-13 11:10:38,720 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 11:10:38,725 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;@4620613a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 11:10:38,726 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-12-13 11:10:38,729 INFO L130 PetriNetUnfolder]: 3/12 cut-off events. [2022-12-13 11:10:38,729 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 11:10:38,729 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:10:38,730 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 11:10:38,730 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 11:10:38,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:10:38,734 INFO L85 PathProgramCache]: Analyzing trace with hash -1641818498, now seen corresponding path program 1 times [2022-12-13 11:10:38,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:10:38,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596285681] [2022-12-13 11:10:38,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:10:38,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:10:38,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:10:38,910 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 11:10:38,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:10:38,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596285681] [2022-12-13 11:10:38,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596285681] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:10:38,911 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:10:38,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 11:10:38,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123406692] [2022-12-13 11:10:38,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:10:38,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 11:10:38,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:10:38,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 11:10:38,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 11:10:38,949 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 198 [2022-12-13 11:10:38,951 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 18 places, 14 transitions, 34 flow. Second operand has 3 states, 3 states have (on average 92.0) internal successors, (276), 3 states have internal predecessors, (276), 0 states have call successors, (0), 0 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 11:10:38,951 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:10:38,951 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 198 [2022-12-13 11:10:38,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:10:39,006 INFO L130 PetriNetUnfolder]: 97/149 cut-off events. [2022-12-13 11:10:39,006 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 11:10:39,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 310 conditions, 149 events. 97/149 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 331 event pairs, 20 based on Foata normal form. 0/99 useless extension candidates. Maximal degree in co-relation 300. Up to 91 conditions per place. [2022-12-13 11:10:39,008 INFO L137 encePairwiseOnDemand]: 194/198 looper letters, 18 selfloop transitions, 2 changer transitions 1/21 dead transitions. [2022-12-13 11:10:39,008 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 20 places, 21 transitions, 90 flow [2022-12-13 11:10:39,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:10:39,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 11:10:39,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 293 transitions. [2022-12-13 11:10:39,017 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49326599326599324 [2022-12-13 11:10:39,018 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 293 transitions. [2022-12-13 11:10:39,018 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 293 transitions. [2022-12-13 11:10:39,019 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:10:39,021 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 293 transitions. [2022-12-13 11:10:39,023 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 97.66666666666667) internal successors, (293), 3 states have internal predecessors, (293), 0 states have call successors, (0), 0 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 11:10:39,027 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 198.0) internal successors, (792), 4 states have internal predecessors, (792), 0 states have call successors, (0), 0 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 11:10:39,027 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 198.0) internal successors, (792), 4 states have internal predecessors, (792), 0 states have call successors, (0), 0 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 11:10:39,028 INFO L175 Difference]: Start difference. First operand has 18 places, 14 transitions, 34 flow. Second operand 3 states and 293 transitions. [2022-12-13 11:10:39,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 20 places, 21 transitions, 90 flow [2022-12-13 11:10:39,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 21 transitions, 88 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 11:10:39,031 INFO L231 Difference]: Finished difference. Result has 19 places, 14 transitions, 42 flow [2022-12-13 11:10:39,033 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=32, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=14, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=42, PETRI_PLACES=19, PETRI_TRANSITIONS=14} [2022-12-13 11:10:39,035 INFO L288 CegarLoopForPetriNet]: 18 programPoint places, 1 predicate places. [2022-12-13 11:10:39,036 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 14 transitions, 42 flow [2022-12-13 11:10:39,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 92.0) internal successors, (276), 3 states have internal predecessors, (276), 0 states have call successors, (0), 0 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 11:10:39,036 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:10:39,036 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:10:39,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 11:10:39,036 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 11:10:39,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:10:39,037 INFO L85 PathProgramCache]: Analyzing trace with hash 643234342, now seen corresponding path program 1 times [2022-12-13 11:10:39,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:10:39,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916569535] [2022-12-13 11:10:39,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:10:39,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:10:39,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:10:39,107 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:10:39,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:10:39,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916569535] [2022-12-13 11:10:39,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916569535] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:10:39,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625090106] [2022-12-13 11:10:39,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:10:39,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:10:39,108 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_843c4a14-37ea-4c63-a274-2cf5d1c3ec69/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:10:39,109 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_843c4a14-37ea-4c63-a274-2cf5d1c3ec69/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:10:39,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_843c4a14-37ea-4c63-a274-2cf5d1c3ec69/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 11:10:39,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:10:39,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 11:10:39,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:10:39,202 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:10:39,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:10:39,217 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:10:39,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625090106] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:10:39,218 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:10:39,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-12-13 11:10:39,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306140795] [2022-12-13 11:10:39,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:10:39,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 11:10:39,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:10:39,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 11:10:39,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-13 11:10:39,236 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 198 [2022-12-13 11:10:39,237 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 14 transitions, 42 flow. Second operand has 7 states, 7 states have (on average 90.71428571428571) internal successors, (635), 7 states have internal predecessors, (635), 0 states have call successors, (0), 0 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 11:10:39,237 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:10:39,237 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 198 [2022-12-13 11:10:39,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:10:39,322 INFO L130 PetriNetUnfolder]: 133/203 cut-off events. [2022-12-13 11:10:39,322 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-12-13 11:10:39,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 482 conditions, 203 events. 133/203 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 452 event pairs, 20 based on Foata normal form. 0/150 useless extension candidates. Maximal degree in co-relation 471. Up to 64 conditions per place. [2022-12-13 11:10:39,324 INFO L137 encePairwiseOnDemand]: 195/198 looper letters, 36 selfloop transitions, 5 changer transitions 0/41 dead transitions. [2022-12-13 11:10:39,324 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 41 transitions, 184 flow [2022-12-13 11:10:39,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 11:10:39,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 11:10:39,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 578 transitions. [2022-12-13 11:10:39,328 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48653198653198654 [2022-12-13 11:10:39,328 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 578 transitions. [2022-12-13 11:10:39,329 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 578 transitions. [2022-12-13 11:10:39,329 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:10:39,329 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 578 transitions. [2022-12-13 11:10:39,332 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 96.33333333333333) internal successors, (578), 6 states have internal predecessors, (578), 0 states have call successors, (0), 0 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 11:10:39,334 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 198.0) internal successors, (1386), 7 states have internal predecessors, (1386), 0 states have call successors, (0), 0 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 11:10:39,335 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 198.0) internal successors, (1386), 7 states have internal predecessors, (1386), 0 states have call successors, (0), 0 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 11:10:39,335 INFO L175 Difference]: Start difference. First operand has 19 places, 14 transitions, 42 flow. Second operand 6 states and 578 transitions. [2022-12-13 11:10:39,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 41 transitions, 184 flow [2022-12-13 11:10:39,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 41 transitions, 182 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 11:10:39,336 INFO L231 Difference]: Finished difference. Result has 25 places, 17 transitions, 76 flow [2022-12-13 11:10:39,337 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=14, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=76, PETRI_PLACES=25, PETRI_TRANSITIONS=17} [2022-12-13 11:10:39,337 INFO L288 CegarLoopForPetriNet]: 18 programPoint places, 7 predicate places. [2022-12-13 11:10:39,337 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 17 transitions, 76 flow [2022-12-13 11:10:39,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 90.71428571428571) internal successors, (635), 7 states have internal predecessors, (635), 0 states have call successors, (0), 0 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 11:10:39,338 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:10:39,338 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2022-12-13 11:10:39,346 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_843c4a14-37ea-4c63-a274-2cf5d1c3ec69/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 11:10:39,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_843c4a14-37ea-4c63-a274-2cf5d1c3ec69/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-12-13 11:10:39,540 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 11:10:39,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:10:39,542 INFO L85 PathProgramCache]: Analyzing trace with hash -1549565826, now seen corresponding path program 2 times [2022-12-13 11:10:39,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:10:39,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077267689] [2022-12-13 11:10:39,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:10:39,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:10:39,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:10:39,737 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:10:39,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:10:39,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077267689] [2022-12-13 11:10:39,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077267689] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:10:39,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475320612] [2022-12-13 11:10:39,738 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 11:10:39,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:10:39,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_843c4a14-37ea-4c63-a274-2cf5d1c3ec69/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:10:39,739 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_843c4a14-37ea-4c63-a274-2cf5d1c3ec69/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:10:39,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_843c4a14-37ea-4c63-a274-2cf5d1c3ec69/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 11:10:39,804 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 11:10:39,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:10:39,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 11:10:39,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:10:39,821 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:10:39,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:10:39,861 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:10:39,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475320612] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:10:39,862 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:10:39,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-12-13 11:10:39,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015847170] [2022-12-13 11:10:39,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:10:39,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 11:10:39,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:10:39,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 11:10:39,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-12-13 11:10:39,884 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 198 [2022-12-13 11:10:39,886 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 17 transitions, 76 flow. Second operand has 13 states, 13 states have (on average 90.38461538461539) internal successors, (1175), 13 states have internal predecessors, (1175), 0 states have call successors, (0), 0 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 11:10:39,886 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:10:39,886 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 198 [2022-12-13 11:10:39,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:10:40,024 INFO L130 PetriNetUnfolder]: 241/365 cut-off events. [2022-12-13 11:10:40,025 INFO L131 PetriNetUnfolder]: For 216/216 co-relation queries the response was YES. [2022-12-13 11:10:40,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1008 conditions, 365 events. 241/365 cut-off events. For 216/216 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 846 event pairs, 20 based on Foata normal form. 54/339 useless extension candidates. Maximal degree in co-relation 993. Up to 109 conditions per place. [2022-12-13 11:10:40,027 INFO L137 encePairwiseOnDemand]: 195/198 looper letters, 72 selfloop transitions, 11 changer transitions 0/83 dead transitions. [2022-12-13 11:10:40,027 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 83 transitions, 398 flow [2022-12-13 11:10:40,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 11:10:40,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-13 11:10:40,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1157 transitions. [2022-12-13 11:10:40,031 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48695286195286197 [2022-12-13 11:10:40,031 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1157 transitions. [2022-12-13 11:10:40,031 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1157 transitions. [2022-12-13 11:10:40,032 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:10:40,032 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1157 transitions. [2022-12-13 11:10:40,034 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 96.41666666666667) internal successors, (1157), 12 states have internal predecessors, (1157), 0 states have call successors, (0), 0 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 11:10:40,038 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 198.0) internal successors, (2574), 13 states have internal predecessors, (2574), 0 states have call successors, (0), 0 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 11:10:40,038 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 198.0) internal successors, (2574), 13 states have internal predecessors, (2574), 0 states have call successors, (0), 0 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 11:10:40,039 INFO L175 Difference]: Start difference. First operand has 25 places, 17 transitions, 76 flow. Second operand 12 states and 1157 transitions. [2022-12-13 11:10:40,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 83 transitions, 398 flow [2022-12-13 11:10:40,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 83 transitions, 384 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-12-13 11:10:40,041 INFO L231 Difference]: Finished difference. Result has 41 places, 23 transitions, 146 flow [2022-12-13 11:10:40,041 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=146, PETRI_PLACES=41, PETRI_TRANSITIONS=23} [2022-12-13 11:10:40,042 INFO L288 CegarLoopForPetriNet]: 18 programPoint places, 23 predicate places. [2022-12-13 11:10:40,042 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 23 transitions, 146 flow [2022-12-13 11:10:40,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 90.38461538461539) internal successors, (1175), 13 states have internal predecessors, (1175), 0 states have call successors, (0), 0 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 11:10:40,043 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:10:40,043 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1] [2022-12-13 11:10:40,048 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_843c4a14-37ea-4c63-a274-2cf5d1c3ec69/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-12-13 11:10:40,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_843c4a14-37ea-4c63-a274-2cf5d1c3ec69/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:10:40,244 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 11:10:40,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:10:40,245 INFO L85 PathProgramCache]: Analyzing trace with hash -698507394, now seen corresponding path program 3 times [2022-12-13 11:10:40,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:10:40,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755840241] [2022-12-13 11:10:40,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:10:40,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:10:40,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:10:40,434 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:10:40,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:10:40,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755840241] [2022-12-13 11:10:40,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755840241] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:10:40,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341330766] [2022-12-13 11:10:40,435 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 11:10:40,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:10:40,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_843c4a14-37ea-4c63-a274-2cf5d1c3ec69/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:10:40,436 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_843c4a14-37ea-4c63-a274-2cf5d1c3ec69/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:10:40,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_843c4a14-37ea-4c63-a274-2cf5d1c3ec69/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 11:10:40,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-13 11:10:40,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:10:40,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 11:10:40,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:10:40,553 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:10:40,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:10:40,687 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:10:40,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341330766] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:10:40,688 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:10:40,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-12-13 11:10:40,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835282745] [2022-12-13 11:10:40,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:10:40,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-13 11:10:40,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:10:40,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-13 11:10:40,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-12-13 11:10:40,734 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 198 [2022-12-13 11:10:40,737 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 23 transitions, 146 flow. Second operand has 25 states, 25 states have (on average 90.2) internal successors, (2255), 25 states have internal predecessors, (2255), 0 states have call successors, (0), 0 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 11:10:40,737 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:10:40,737 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 198 [2022-12-13 11:10:40,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:10:41,010 INFO L130 PetriNetUnfolder]: 457/689 cut-off events. [2022-12-13 11:10:41,010 INFO L131 PetriNetUnfolder]: For 4212/4212 co-relation queries the response was YES. [2022-12-13 11:10:41,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2140 conditions, 689 events. 457/689 cut-off events. For 4212/4212 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1646 event pairs, 20 based on Foata normal form. 108/645 useless extension candidates. Maximal degree in co-relation 2118. Up to 190 conditions per place. [2022-12-13 11:10:41,013 INFO L137 encePairwiseOnDemand]: 195/198 looper letters, 144 selfloop transitions, 23 changer transitions 0/167 dead transitions. [2022-12-13 11:10:41,013 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 167 transitions, 840 flow [2022-12-13 11:10:41,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-13 11:10:41,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-12-13 11:10:41,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2315 transitions. [2022-12-13 11:10:41,017 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4871632996632997 [2022-12-13 11:10:41,017 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2315 transitions. [2022-12-13 11:10:41,017 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2315 transitions. [2022-12-13 11:10:41,018 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:10:41,018 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2315 transitions. [2022-12-13 11:10:41,021 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 96.45833333333333) internal successors, (2315), 24 states have internal predecessors, (2315), 0 states have call successors, (0), 0 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 11:10:41,025 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 198.0) internal successors, (4950), 25 states have internal predecessors, (4950), 0 states have call successors, (0), 0 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 11:10:41,026 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 198.0) internal successors, (4950), 25 states have internal predecessors, (4950), 0 states have call successors, (0), 0 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 11:10:41,026 INFO L175 Difference]: Start difference. First operand has 41 places, 23 transitions, 146 flow. Second operand 24 states and 2315 transitions. [2022-12-13 11:10:41,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 167 transitions, 840 flow [2022-12-13 11:10:41,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 167 transitions, 768 flow, removed 31 selfloop flow, removed 5 redundant places. [2022-12-13 11:10:41,032 INFO L231 Difference]: Finished difference. Result has 71 places, 35 transitions, 266 flow [2022-12-13 11:10:41,032 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=266, PETRI_PLACES=71, PETRI_TRANSITIONS=35} [2022-12-13 11:10:41,033 INFO L288 CegarLoopForPetriNet]: 18 programPoint places, 53 predicate places. [2022-12-13 11:10:41,033 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 35 transitions, 266 flow [2022-12-13 11:10:41,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 90.2) internal successors, (2255), 25 states have internal predecessors, (2255), 0 states have call successors, (0), 0 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 11:10:41,033 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:10:41,034 INFO L209 CegarLoopForPetriNet]: trace histogram [22, 1, 1, 1, 1, 1, 1] [2022-12-13 11:10:41,039 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_843c4a14-37ea-4c63-a274-2cf5d1c3ec69/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-12-13 11:10:41,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_843c4a14-37ea-4c63-a274-2cf5d1c3ec69/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:10:41,235 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 11:10:41,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:10:41,235 INFO L85 PathProgramCache]: Analyzing trace with hash 1078467966, now seen corresponding path program 4 times [2022-12-13 11:10:41,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:10:41,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903377705] [2022-12-13 11:10:41,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:10:41,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:10:41,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:10:41,588 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:10:41,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:10:41,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903377705] [2022-12-13 11:10:41,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903377705] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:10:41,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038266529] [2022-12-13 11:10:41,589 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 11:10:41,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:10:41,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_843c4a14-37ea-4c63-a274-2cf5d1c3ec69/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:10:41,590 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_843c4a14-37ea-4c63-a274-2cf5d1c3ec69/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:10:41,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_843c4a14-37ea-4c63-a274-2cf5d1c3ec69/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 11:10:41,669 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 11:10:41,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:10:41,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-13 11:10:41,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:10:41,721 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:10:41,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:10:41,933 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:10:41,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038266529] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:10:41,933 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:10:41,933 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 26 [2022-12-13 11:10:41,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637032326] [2022-12-13 11:10:41,937 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:10:41,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-13 11:10:41,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:10:41,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-13 11:10:41,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2022-12-13 11:10:41,966 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 198 [2022-12-13 11:10:41,967 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 35 transitions, 266 flow. Second operand has 27 states, 27 states have (on average 90.22222222222223) internal successors, (2436), 27 states have internal predecessors, (2436), 0 states have call successors, (0), 0 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 11:10:41,967 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:10:41,967 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 198 [2022-12-13 11:10:41,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:10:42,238 INFO L130 PetriNetUnfolder]: 493/743 cut-off events. [2022-12-13 11:10:42,238 INFO L131 PetriNetUnfolder]: For 5562/5562 co-relation queries the response was YES. [2022-12-13 11:10:42,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2422 conditions, 743 events. 493/743 cut-off events. For 5562/5562 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1779 event pairs, 20 based on Foata normal form. 18/597 useless extension candidates. Maximal degree in co-relation 2388. Up to 166 conditions per place. [2022-12-13 11:10:42,245 INFO L137 encePairwiseOnDemand]: 195/198 looper letters, 156 selfloop transitions, 25 changer transitions 0/181 dead transitions. [2022-12-13 11:10:42,245 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 181 transitions, 932 flow [2022-12-13 11:10:42,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-12-13 11:10:42,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-12-13 11:10:42,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2497 transitions. [2022-12-13 11:10:42,250 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48504273504273504 [2022-12-13 11:10:42,250 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2497 transitions. [2022-12-13 11:10:42,250 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2497 transitions. [2022-12-13 11:10:42,252 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:10:42,252 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2497 transitions. [2022-12-13 11:10:42,257 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 96.03846153846153) internal successors, (2497), 26 states have internal predecessors, (2497), 0 states have call successors, (0), 0 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 11:10:42,264 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 198.0) internal successors, (5346), 27 states have internal predecessors, (5346), 0 states have call successors, (0), 0 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 11:10:42,265 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 198.0) internal successors, (5346), 27 states have internal predecessors, (5346), 0 states have call successors, (0), 0 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 11:10:42,266 INFO L175 Difference]: Start difference. First operand has 71 places, 35 transitions, 266 flow. Second operand 26 states and 2497 transitions. [2022-12-13 11:10:42,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 181 transitions, 932 flow [2022-12-13 11:10:42,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 181 transitions, 832 flow, removed 39 selfloop flow, removed 11 redundant places. [2022-12-13 11:10:42,281 INFO L231 Difference]: Finished difference. Result has 87 places, 37 transitions, 242 flow [2022-12-13 11:10:42,282 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=242, PETRI_PLACES=87, PETRI_TRANSITIONS=37} [2022-12-13 11:10:42,282 INFO L288 CegarLoopForPetriNet]: 18 programPoint places, 69 predicate places. [2022-12-13 11:10:42,282 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 37 transitions, 242 flow [2022-12-13 11:10:42,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 90.22222222222223) internal successors, (2436), 27 states have internal predecessors, (2436), 0 states have call successors, (0), 0 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 11:10:42,284 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:10:42,284 INFO L209 CegarLoopForPetriNet]: trace histogram [24, 1, 1, 1, 1, 1, 1] [2022-12-13 11:10:42,290 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_843c4a14-37ea-4c63-a274-2cf5d1c3ec69/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 11:10:42,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_843c4a14-37ea-4c63-a274-2cf5d1c3ec69/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:10:42,484 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 11:10:42,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:10:42,485 INFO L85 PathProgramCache]: Analyzing trace with hash 1320604286, now seen corresponding path program 5 times [2022-12-13 11:10:42,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:10:42,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367827799] [2022-12-13 11:10:42,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:10:42,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:10:42,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:10:43,596 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:10:43,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:10:43,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367827799] [2022-12-13 11:10:43,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367827799] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:10:43,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84039190] [2022-12-13 11:10:43,596 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 11:10:43,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:10:43,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_843c4a14-37ea-4c63-a274-2cf5d1c3ec69/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:10:43,598 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_843c4a14-37ea-4c63-a274-2cf5d1c3ec69/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:10:43,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_843c4a14-37ea-4c63-a274-2cf5d1c3ec69/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 11:10:43,683 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2022-12-13 11:10:43,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:10:43,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 83 conjunts are in the unsatisfiable core [2022-12-13 11:10:43,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:10:44,682 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 253 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:10:44,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:10:46,000 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:10:46,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84039190] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:10:46,000 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:10:46,000 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 75 [2022-12-13 11:10:46,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650636557] [2022-12-13 11:10:46,000 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:10:46,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-12-13 11:10:46,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:10:46,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-12-13 11:10:46,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1048, Invalid=4804, Unknown=0, NotChecked=0, Total=5852 [2022-12-13 11:10:47,419 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 198 [2022-12-13 11:10:47,426 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 37 transitions, 242 flow. Second operand has 77 states, 77 states have (on average 85.16883116883118) internal successors, (6558), 77 states have internal predecessors, (6558), 0 states have call successors, (0), 0 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 11:10:47,426 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:10:47,426 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 198 [2022-12-13 11:10:47,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:11:45,097 INFO L130 PetriNetUnfolder]: 87355/131052 cut-off events. [2022-12-13 11:11:45,097 INFO L131 PetriNetUnfolder]: For 743364/743364 co-relation queries the response was YES. [2022-12-13 11:11:45,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 412806 conditions, 131052 events. 87355/131052 cut-off events. For 743364/743364 co-relation queries the response was YES. Maximal size of possible extension queue 2533. Compared 979898 event pairs, 96 based on Foata normal form. 209/98523 useless extension candidates. Maximal degree in co-relation 412770. Up to 27314 conditions per place. [2022-12-13 11:11:46,163 INFO L137 encePairwiseOnDemand]: 193/198 looper letters, 1759 selfloop transitions, 5829 changer transitions 0/7588 dead transitions. [2022-12-13 11:11:46,163 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 7588 transitions, 67711 flow [2022-12-13 11:11:46,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 352 states. [2022-12-13 11:11:46,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 352 states. [2022-12-13 11:11:46,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 32381 transitions. [2022-12-13 11:11:46,204 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4646034205693297 [2022-12-13 11:11:46,204 INFO L72 ComplementDD]: Start complementDD. Operand 352 states and 32381 transitions. [2022-12-13 11:11:46,204 INFO L73 IsDeterministic]: Start isDeterministic. Operand 352 states and 32381 transitions. [2022-12-13 11:11:46,213 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:11:46,213 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 352 states and 32381 transitions. [2022-12-13 11:11:46,257 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 353 states, 352 states have (on average 91.99147727272727) internal successors, (32381), 352 states have internal predecessors, (32381), 0 states have call successors, (0), 0 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 11:11:46,319 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 353 states, 353 states have (on average 198.0) internal successors, (69894), 353 states have internal predecessors, (69894), 0 states have call successors, (0), 0 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 11:11:46,331 INFO L81 ComplementDD]: Finished complementDD. Result has 353 states, 353 states have (on average 198.0) internal successors, (69894), 353 states have internal predecessors, (69894), 0 states have call successors, (0), 0 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 11:11:46,331 INFO L175 Difference]: Start difference. First operand has 87 places, 37 transitions, 242 flow. Second operand 352 states and 32381 transitions. [2022-12-13 11:11:46,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 7588 transitions, 67711 flow [2022-12-13 11:11:54,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 7588 transitions, 54901 flow, removed 2193 selfloop flow, removed 23 redundant places. [2022-12-13 11:11:54,496 INFO L231 Difference]: Finished difference. Result has 443 places, 5866 transitions, 35338 flow [2022-12-13 11:11:54,496 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=352, PETRI_FLOW=35338, PETRI_PLACES=443, PETRI_TRANSITIONS=5866} [2022-12-13 11:11:54,497 INFO L288 CegarLoopForPetriNet]: 18 programPoint places, 425 predicate places. [2022-12-13 11:11:54,497 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 5866 transitions, 35338 flow [2022-12-13 11:11:54,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 85.16883116883118) internal successors, (6558), 77 states have internal predecessors, (6558), 0 states have call successors, (0), 0 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 11:11:54,498 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:11:54,498 INFO L209 CegarLoopForPetriNet]: trace histogram [24, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:11:54,502 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_843c4a14-37ea-4c63-a274-2cf5d1c3ec69/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-12-13 11:11:54,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_843c4a14-37ea-4c63-a274-2cf5d1c3ec69/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-12-13 11:11:54,699 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 11:11:54,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:11:54,699 INFO L85 PathProgramCache]: Analyzing trace with hash -1197815022, now seen corresponding path program 1 times [2022-12-13 11:11:54,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:11:54,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222974514] [2022-12-13 11:11:54,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:11:54,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:11:54,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:11:55,741 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:11:55,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:11:55,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222974514] [2022-12-13 11:11:55,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222974514] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:11:55,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843696427] [2022-12-13 11:11:55,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:11:55,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:11:55,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_843c4a14-37ea-4c63-a274-2cf5d1c3ec69/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:11:55,743 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_843c4a14-37ea-4c63-a274-2cf5d1c3ec69/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:11:55,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_843c4a14-37ea-4c63-a274-2cf5d1c3ec69/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 11:11:55,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:11:55,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 82 conjunts are in the unsatisfiable core [2022-12-13 11:11:55,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:11:57,046 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 211 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:11:57,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:11:58,561 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:11:58,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843696427] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:11:58,561 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:11:58,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 81 [2022-12-13 11:11:58,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985100871] [2022-12-13 11:11:58,561 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:11:58,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-12-13 11:11:58,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:11:58,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-12-13 11:11:58,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1091, Invalid=5715, Unknown=0, NotChecked=0, Total=6806 [2022-12-13 11:12:00,197 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 198 [2022-12-13 11:12:00,200 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 5866 transitions, 35338 flow. Second operand has 83 states, 83 states have (on average 85.19277108433735) internal successors, (7071), 83 states have internal predecessors, (7071), 0 states have call successors, (0), 0 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 11:12:00,200 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:12:00,200 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 198 [2022-12-13 11:12:00,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand