./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/fib_unsafe-12.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_d9d14ea7-b522-4323-8f86-c1599e70b3cb/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9d14ea7-b522-4323-8f86-c1599e70b3cb/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_d9d14ea7-b522-4323-8f86-c1599e70b3cb/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9d14ea7-b522-4323-8f86-c1599e70b3cb/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/fib_unsafe-12.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9d14ea7-b522-4323-8f86-c1599e70b3cb/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_d9d14ea7-b522-4323-8f86-c1599e70b3cb/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 0d5255e9cc8ffb776115e75fa8fa1fa6c2774a79275dfd8235c357288b00417c --- 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 10:58:00,554 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 10:58:00,556 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 10:58:00,572 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 10:58:00,573 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 10:58:00,573 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 10:58:00,574 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 10:58:00,575 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 10:58:00,576 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 10:58:00,577 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 10:58:00,578 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 10:58:00,578 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 10:58:00,578 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 10:58:00,579 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 10:58:00,580 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 10:58:00,580 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 10:58:00,581 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 10:58:00,582 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 10:58:00,583 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 10:58:00,584 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 10:58:00,585 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 10:58:00,586 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 10:58:00,588 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 10:58:00,588 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 10:58:00,591 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 10:58:00,591 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 10:58:00,591 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 10:58:00,592 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 10:58:00,592 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 10:58:00,593 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 10:58:00,593 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 10:58:00,594 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 10:58:00,594 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 10:58:00,595 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 10:58:00,596 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 10:58:00,596 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 10:58:00,597 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 10:58:00,597 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 10:58:00,597 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 10:58:00,598 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 10:58:00,599 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 10:58:00,600 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9d14ea7-b522-4323-8f86-c1599e70b3cb/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 10:58:00,624 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 10:58:00,625 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 10:58:00,625 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 10:58:00,625 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 10:58:00,626 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 10:58:00,626 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 10:58:00,627 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 10:58:00,627 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 10:58:00,627 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 10:58:00,627 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 10:58:00,627 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 10:58:00,627 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 10:58:00,628 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 10:58:00,628 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 10:58:00,628 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 10:58:00,628 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 10:58:00,628 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 10:58:00,628 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 10:58:00,629 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 10:58:00,629 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 10:58:00,629 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 10:58:00,629 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 10:58:00,629 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 10:58:00,629 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 10:58:00,630 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 10:58:00,630 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 10:58:00,630 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 10:58:00,630 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 10:58:00,630 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 10:58:00,630 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 10:58:00,631 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 10:58:00,631 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 10:58:00,631 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 10:58:00,631 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 10:58:00,631 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 10:58:00,631 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_d9d14ea7-b522-4323-8f86-c1599e70b3cb/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9d14ea7-b522-4323-8f86-c1599e70b3cb/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0d5255e9cc8ffb776115e75fa8fa1fa6c2774a79275dfd8235c357288b00417c [2022-12-13 10:58:00,835 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 10:58:00,855 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 10:58:00,857 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 10:58:00,858 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 10:58:00,859 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 10:58:00,860 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9d14ea7-b522-4323-8f86-c1599e70b3cb/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/pthread/fib_unsafe-12.i [2022-12-13 10:58:03,478 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 10:58:03,677 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 10:58:03,678 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9d14ea7-b522-4323-8f86-c1599e70b3cb/sv-benchmarks/c/pthread/fib_unsafe-12.i [2022-12-13 10:58:03,693 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9d14ea7-b522-4323-8f86-c1599e70b3cb/bin/uautomizer-uyxdKDjOR8/data/d793d09bc/6d41e31387b64e739e88a4f3584f0cb5/FLAG3c1cb6df7 [2022-12-13 10:58:03,703 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9d14ea7-b522-4323-8f86-c1599e70b3cb/bin/uautomizer-uyxdKDjOR8/data/d793d09bc/6d41e31387b64e739e88a4f3584f0cb5 [2022-12-13 10:58:03,705 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 10:58:03,706 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 10:58:03,707 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 10:58:03,707 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 10:58:03,710 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 10:58:03,710 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 10:58:03" (1/1) ... [2022-12-13 10:58:03,711 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c974be3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:58:03, skipping insertion in model container [2022-12-13 10:58:03,711 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 10:58:03" (1/1) ... [2022-12-13 10:58:03,717 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 10:58:03,751 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 10:58:03,985 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_d9d14ea7-b522-4323-8f86-c1599e70b3cb/sv-benchmarks/c/pthread/fib_unsafe-12.i[30243,30256] [2022-12-13 10:58:03,991 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 10:58:03,992 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 10:58:03,994 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 10:58:03,995 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 10:58:03,998 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 10:58:03,998 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 10:58:03,998 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 10:58:03,998 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 10:58:04,001 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 10:58:04,002 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 10:58:04,003 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 10:58:04,010 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 10:58:04,031 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_d9d14ea7-b522-4323-8f86-c1599e70b3cb/sv-benchmarks/c/pthread/fib_unsafe-12.i[30243,30256] [2022-12-13 10:58:04,032 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 10:58:04,032 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 10:58:04,033 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 10:58:04,033 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 10:58:04,035 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 10:58:04,035 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 10:58:04,036 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 10:58:04,036 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 10:58:04,037 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 10:58:04,037 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 10:58:04,038 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 10:58:04,057 INFO L208 MainTranslator]: Completed translation [2022-12-13 10:58:04,058 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:58:04 WrapperNode [2022-12-13 10:58:04,058 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 10:58:04,059 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 10:58:04,059 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 10:58:04,059 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 10:58:04,064 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:58:04" (1/1) ... [2022-12-13 10:58:04,072 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:58:04" (1/1) ... [2022-12-13 10:58:04,086 INFO L138 Inliner]: procedures = 165, calls = 28, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 76 [2022-12-13 10:58:04,086 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 10:58:04,087 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 10:58:04,087 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 10:58:04,087 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 10:58:04,093 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:58:04" (1/1) ... [2022-12-13 10:58:04,093 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:58:04" (1/1) ... [2022-12-13 10:58:04,095 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:58:04" (1/1) ... [2022-12-13 10:58:04,095 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:58:04" (1/1) ... [2022-12-13 10:58:04,099 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:58:04" (1/1) ... [2022-12-13 10:58:04,101 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:58:04" (1/1) ... [2022-12-13 10:58:04,102 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:58:04" (1/1) ... [2022-12-13 10:58:04,103 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:58:04" (1/1) ... [2022-12-13 10:58:04,105 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 10:58:04,106 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 10:58:04,106 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 10:58:04,106 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 10:58:04,107 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:58:04" (1/1) ... [2022-12-13 10:58:04,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 10:58:04,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9d14ea7-b522-4323-8f86-c1599e70b3cb/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 10:58:04,130 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9d14ea7-b522-4323-8f86-c1599e70b3cb/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 10:58:04,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9d14ea7-b522-4323-8f86-c1599e70b3cb/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 10:58:04,161 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-12-13 10:58:04,161 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-12-13 10:58:04,161 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-12-13 10:58:04,161 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-12-13 10:58:04,161 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 10:58:04,162 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-13 10:58:04,162 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 10:58:04,162 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 10:58:04,162 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 10:58:04,162 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 10:58:04,162 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-13 10:58:04,162 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 10:58:04,162 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 10:58:04,163 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 10:58:04,255 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 10:58:04,257 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 10:58:04,402 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 10:58:04,407 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 10:58:04,407 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-13 10:58:04,409 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 10:58:04 BoogieIcfgContainer [2022-12-13 10:58:04,409 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 10:58:04,411 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 10:58:04,411 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 10:58:04,413 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 10:58:04,413 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 10:58:03" (1/3) ... [2022-12-13 10:58:04,414 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28254027 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 10:58:04, skipping insertion in model container [2022-12-13 10:58:04,414 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:58:04" (2/3) ... [2022-12-13 10:58:04,414 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28254027 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 10:58:04, skipping insertion in model container [2022-12-13 10:58:04,414 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 10:58:04" (3/3) ... [2022-12-13 10:58:04,415 INFO L112 eAbstractionObserver]: Analyzing ICFG fib_unsafe-12.i [2022-12-13 10:58:04,422 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-12-13 10:58:04,429 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 10:58:04,430 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-13 10:58:04,430 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 10:58:04,475 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-13 10:58:04,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 101 places, 101 transitions, 212 flow [2022-12-13 10:58:04,536 INFO L130 PetriNetUnfolder]: 7/99 cut-off events. [2022-12-13 10:58:04,536 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 10:58:04,542 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 10:58:04,542 INFO L82 GeneralOperation]: Start removeDead. Operand has 101 places, 101 transitions, 212 flow [2022-12-13 10:58:04,545 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 99 places, 99 transitions, 204 flow [2022-12-13 10:58:04,548 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 10:58:04,556 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 99 places, 99 transitions, 204 flow [2022-12-13 10:58:04,558 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 99 places, 99 transitions, 204 flow [2022-12-13 10:58:04,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 99 places, 99 transitions, 204 flow [2022-12-13 10:58:04,578 INFO L130 PetriNetUnfolder]: 7/99 cut-off events. [2022-12-13 10:58:04,578 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 10:58:04,579 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 10:58:04,580 INFO L119 LiptonReduction]: Number of co-enabled transitions 2134 [2022-12-13 10:58:06,707 INFO L134 LiptonReduction]: Checked pairs total: 1542 [2022-12-13 10:58:06,708 INFO L136 LiptonReduction]: Total number of compositions: 97 [2022-12-13 10:58:06,719 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 10:58:06,724 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;@37063759, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 10:58:06,724 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-12-13 10:58:06,727 INFO L130 PetriNetUnfolder]: 3/12 cut-off events. [2022-12-13 10:58:06,727 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 10:58:06,727 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 10:58:06,727 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 10:58:06,728 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 10:58:06,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 10:58:06,731 INFO L85 PathProgramCache]: Analyzing trace with hash -1641818498, now seen corresponding path program 1 times [2022-12-13 10:58:06,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 10:58:06,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121839417] [2022-12-13 10:58:06,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 10:58:06,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 10:58:06,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:58:06,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 10:58:06,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 10:58:06,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121839417] [2022-12-13 10:58:06,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121839417] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 10:58:06,938 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 10:58:06,938 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 10:58:06,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037563446] [2022-12-13 10:58:06,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 10:58:06,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 10:58:06,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 10:58:06,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 10:58:06,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 10:58:06,983 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 198 [2022-12-13 10:58:06,986 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 10:58:06,986 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 10:58:06,986 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 198 [2022-12-13 10:58:06,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 10:58:07,039 INFO L130 PetriNetUnfolder]: 97/149 cut-off events. [2022-12-13 10:58:07,039 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 10:58:07,040 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 10:58:07,041 INFO L137 encePairwiseOnDemand]: 194/198 looper letters, 18 selfloop transitions, 2 changer transitions 1/21 dead transitions. [2022-12-13 10:58:07,041 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 20 places, 21 transitions, 90 flow [2022-12-13 10:58:07,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 10:58:07,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 10:58:07,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 293 transitions. [2022-12-13 10:58:07,052 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49326599326599324 [2022-12-13 10:58:07,052 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 293 transitions. [2022-12-13 10:58:07,053 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 293 transitions. [2022-12-13 10:58:07,054 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 10:58:07,055 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 293 transitions. [2022-12-13 10:58:07,057 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 10:58:07,061 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 10:58:07,061 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 10:58:07,062 INFO L175 Difference]: Start difference. First operand has 18 places, 14 transitions, 34 flow. Second operand 3 states and 293 transitions. [2022-12-13 10:58:07,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 20 places, 21 transitions, 90 flow [2022-12-13 10:58:07,064 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 10:58:07,065 INFO L231 Difference]: Finished difference. Result has 19 places, 14 transitions, 42 flow [2022-12-13 10:58:07,066 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 10:58:07,069 INFO L288 CegarLoopForPetriNet]: 18 programPoint places, 1 predicate places. [2022-12-13 10:58:07,069 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 14 transitions, 42 flow [2022-12-13 10:58:07,069 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 10:58:07,069 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 10:58:07,069 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 10:58:07,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 10:58:07,070 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 10:58:07,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 10:58:07,070 INFO L85 PathProgramCache]: Analyzing trace with hash 643234342, now seen corresponding path program 1 times [2022-12-13 10:58:07,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 10:58:07,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003153934] [2022-12-13 10:58:07,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 10:58:07,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 10:58:07,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:58:07,153 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 10:58:07,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 10:58:07,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003153934] [2022-12-13 10:58:07,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003153934] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 10:58:07,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877475674] [2022-12-13 10:58:07,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 10:58:07,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 10:58:07,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9d14ea7-b522-4323-8f86-c1599e70b3cb/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 10:58:07,155 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9d14ea7-b522-4323-8f86-c1599e70b3cb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 10:58:07,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9d14ea7-b522-4323-8f86-c1599e70b3cb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 10:58:07,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:58:07,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 10:58:07,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 10:58:07,254 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 10:58:07,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 10:58:07,268 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 10:58:07,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877475674] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 10:58:07,269 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 10:58:07,269 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-12-13 10:58:07,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381953908] [2022-12-13 10:58:07,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 10:58:07,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 10:58:07,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 10:58:07,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 10:58:07,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-13 10:58:07,287 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 198 [2022-12-13 10:58:07,288 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 10:58:07,288 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 10:58:07,288 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 198 [2022-12-13 10:58:07,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 10:58:07,370 INFO L130 PetriNetUnfolder]: 133/203 cut-off events. [2022-12-13 10:58:07,370 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-12-13 10:58:07,371 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 10:58:07,372 INFO L137 encePairwiseOnDemand]: 195/198 looper letters, 36 selfloop transitions, 5 changer transitions 0/41 dead transitions. [2022-12-13 10:58:07,372 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 41 transitions, 184 flow [2022-12-13 10:58:07,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 10:58:07,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 10:58:07,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 578 transitions. [2022-12-13 10:58:07,375 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48653198653198654 [2022-12-13 10:58:07,375 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 578 transitions. [2022-12-13 10:58:07,375 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 578 transitions. [2022-12-13 10:58:07,375 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 10:58:07,375 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 578 transitions. [2022-12-13 10:58:07,377 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 10:58:07,379 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 10:58:07,379 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 10:58:07,379 INFO L175 Difference]: Start difference. First operand has 19 places, 14 transitions, 42 flow. Second operand 6 states and 578 transitions. [2022-12-13 10:58:07,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 41 transitions, 184 flow [2022-12-13 10:58:07,380 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 10:58:07,380 INFO L231 Difference]: Finished difference. Result has 25 places, 17 transitions, 76 flow [2022-12-13 10:58:07,381 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 10:58:07,381 INFO L288 CegarLoopForPetriNet]: 18 programPoint places, 7 predicate places. [2022-12-13 10:58:07,381 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 17 transitions, 76 flow [2022-12-13 10:58:07,381 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 10:58:07,381 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 10:58:07,382 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2022-12-13 10:58:07,388 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9d14ea7-b522-4323-8f86-c1599e70b3cb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 10:58:07,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9d14ea7-b522-4323-8f86-c1599e70b3cb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 10:58:07,584 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 10:58:07,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 10:58:07,587 INFO L85 PathProgramCache]: Analyzing trace with hash -1549565826, now seen corresponding path program 2 times [2022-12-13 10:58:07,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 10:58:07,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169328289] [2022-12-13 10:58:07,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 10:58:07,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 10:58:07,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:58:07,786 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 10:58:07,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 10:58:07,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169328289] [2022-12-13 10:58:07,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169328289] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 10:58:07,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724067177] [2022-12-13 10:58:07,787 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 10:58:07,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 10:58:07,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9d14ea7-b522-4323-8f86-c1599e70b3cb/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 10:58:07,788 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9d14ea7-b522-4323-8f86-c1599e70b3cb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 10:58:07,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9d14ea7-b522-4323-8f86-c1599e70b3cb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 10:58:07,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 10:58:07,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 10:58:07,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 10:58:07,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 10:58:07,863 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 10:58:07,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 10:58:07,901 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 10:58:07,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724067177] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 10:58:07,901 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 10:58:07,901 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-12-13 10:58:07,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809705005] [2022-12-13 10:58:07,902 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 10:58:07,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 10:58:07,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 10:58:07,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 10:58:07,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-12-13 10:58:07,924 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 198 [2022-12-13 10:58:07,926 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 10:58:07,926 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 10:58:07,926 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 198 [2022-12-13 10:58:07,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 10:58:08,062 INFO L130 PetriNetUnfolder]: 241/365 cut-off events. [2022-12-13 10:58:08,063 INFO L131 PetriNetUnfolder]: For 216/216 co-relation queries the response was YES. [2022-12-13 10:58:08,064 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 10:58:08,065 INFO L137 encePairwiseOnDemand]: 195/198 looper letters, 72 selfloop transitions, 11 changer transitions 0/83 dead transitions. [2022-12-13 10:58:08,065 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 83 transitions, 398 flow [2022-12-13 10:58:08,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 10:58:08,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-13 10:58:08,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1157 transitions. [2022-12-13 10:58:08,069 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48695286195286197 [2022-12-13 10:58:08,069 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1157 transitions. [2022-12-13 10:58:08,069 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1157 transitions. [2022-12-13 10:58:08,069 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 10:58:08,070 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1157 transitions. [2022-12-13 10:58:08,072 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 10:58:08,075 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 10:58:08,076 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 10:58:08,076 INFO L175 Difference]: Start difference. First operand has 25 places, 17 transitions, 76 flow. Second operand 12 states and 1157 transitions. [2022-12-13 10:58:08,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 83 transitions, 398 flow [2022-12-13 10:58:08,078 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 10:58:08,079 INFO L231 Difference]: Finished difference. Result has 41 places, 23 transitions, 146 flow [2022-12-13 10:58:08,079 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 10:58:08,079 INFO L288 CegarLoopForPetriNet]: 18 programPoint places, 23 predicate places. [2022-12-13 10:58:08,080 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 23 transitions, 146 flow [2022-12-13 10:58:08,080 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 10:58:08,080 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 10:58:08,080 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1] [2022-12-13 10:58:08,085 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9d14ea7-b522-4323-8f86-c1599e70b3cb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 10:58:08,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9d14ea7-b522-4323-8f86-c1599e70b3cb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 10:58:08,281 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 10:58:08,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 10:58:08,282 INFO L85 PathProgramCache]: Analyzing trace with hash -698507394, now seen corresponding path program 3 times [2022-12-13 10:58:08,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 10:58:08,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602130211] [2022-12-13 10:58:08,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 10:58:08,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 10:58:08,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:58:08,442 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 10:58:08,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 10:58:08,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602130211] [2022-12-13 10:58:08,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602130211] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 10:58:08,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558203529] [2022-12-13 10:58:08,442 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 10:58:08,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 10:58:08,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9d14ea7-b522-4323-8f86-c1599e70b3cb/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 10:58:08,443 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9d14ea7-b522-4323-8f86-c1599e70b3cb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 10:58:08,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9d14ea7-b522-4323-8f86-c1599e70b3cb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 10:58:08,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-13 10:58:08,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 10:58:08,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 10:58:08,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 10:58:08,544 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 10:58:08,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 10:58:08,677 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 10:58:08,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558203529] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 10:58:08,677 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 10:58:08,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-12-13 10:58:08,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973169533] [2022-12-13 10:58:08,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 10:58:08,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-13 10:58:08,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 10:58:08,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-13 10:58:08,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-12-13 10:58:08,715 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 198 [2022-12-13 10:58:08,717 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 10:58:08,717 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 10:58:08,717 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 198 [2022-12-13 10:58:08,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 10:58:08,956 INFO L130 PetriNetUnfolder]: 457/689 cut-off events. [2022-12-13 10:58:08,956 INFO L131 PetriNetUnfolder]: For 4212/4212 co-relation queries the response was YES. [2022-12-13 10:58:08,959 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 10:58:08,962 INFO L137 encePairwiseOnDemand]: 195/198 looper letters, 144 selfloop transitions, 23 changer transitions 0/167 dead transitions. [2022-12-13 10:58:08,962 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 167 transitions, 840 flow [2022-12-13 10:58:08,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-13 10:58:08,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-12-13 10:58:08,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2315 transitions. [2022-12-13 10:58:08,969 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4871632996632997 [2022-12-13 10:58:08,969 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2315 transitions. [2022-12-13 10:58:08,969 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2315 transitions. [2022-12-13 10:58:08,971 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 10:58:08,971 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2315 transitions. [2022-12-13 10:58:08,976 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 10:58:08,983 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 10:58:08,984 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 10:58:08,985 INFO L175 Difference]: Start difference. First operand has 41 places, 23 transitions, 146 flow. Second operand 24 states and 2315 transitions. [2022-12-13 10:58:08,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 167 transitions, 840 flow [2022-12-13 10:58:08,991 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 10:58:08,992 INFO L231 Difference]: Finished difference. Result has 71 places, 35 transitions, 266 flow [2022-12-13 10:58:08,992 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 10:58:08,993 INFO L288 CegarLoopForPetriNet]: 18 programPoint places, 53 predicate places. [2022-12-13 10:58:08,993 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 35 transitions, 266 flow [2022-12-13 10:58:08,994 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 10:58:08,994 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 10:58:08,995 INFO L209 CegarLoopForPetriNet]: trace histogram [22, 1, 1, 1, 1, 1, 1] [2022-12-13 10:58:08,999 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9d14ea7-b522-4323-8f86-c1599e70b3cb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-12-13 10:58:09,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9d14ea7-b522-4323-8f86-c1599e70b3cb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 10:58:09,195 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 10:58:09,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 10:58:09,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1078467966, now seen corresponding path program 4 times [2022-12-13 10:58:09,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 10:58:09,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133230811] [2022-12-13 10:58:09,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 10:58:09,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 10:58:09,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:58:09,518 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 10:58:09,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 10:58:09,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133230811] [2022-12-13 10:58:09,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133230811] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 10:58:09,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187229294] [2022-12-13 10:58:09,519 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 10:58:09,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 10:58:09,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9d14ea7-b522-4323-8f86-c1599e70b3cb/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 10:58:09,520 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9d14ea7-b522-4323-8f86-c1599e70b3cb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 10:58:09,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9d14ea7-b522-4323-8f86-c1599e70b3cb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 10:58:09,594 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 10:58:09,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 10:58:09,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-13 10:58:09,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 10:58:09,647 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 10:58:09,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 10:58:09,882 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 10:58:09,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187229294] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 10:58:09,882 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 10:58:09,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 28 [2022-12-13 10:58:09,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305133347] [2022-12-13 10:58:09,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 10:58:09,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-12-13 10:58:09,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 10:58:09,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-12-13 10:58:09,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2022-12-13 10:58:09,918 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 198 [2022-12-13 10:58:09,921 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 35 transitions, 266 flow. Second operand has 29 states, 29 states have (on average 90.20689655172414) internal successors, (2616), 29 states have internal predecessors, (2616), 0 states have call successors, (0), 0 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 10:58:09,921 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 10:58:09,921 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 198 [2022-12-13 10:58:09,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 10:58:10,183 INFO L130 PetriNetUnfolder]: 529/797 cut-off events. [2022-12-13 10:58:10,184 INFO L131 PetriNetUnfolder]: For 9342/9342 co-relation queries the response was YES. [2022-12-13 10:58:10,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2584 conditions, 797 events. 529/797 cut-off events. For 9342/9342 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1914 event pairs, 20 based on Foata normal form. 36/657 useless extension candidates. Maximal degree in co-relation 2550. Up to 178 conditions per place. [2022-12-13 10:58:10,190 INFO L137 encePairwiseOnDemand]: 195/198 looper letters, 168 selfloop transitions, 27 changer transitions 0/195 dead transitions. [2022-12-13 10:58:10,191 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 195 transitions, 1000 flow [2022-12-13 10:58:10,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-12-13 10:58:10,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2022-12-13 10:58:10,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 2691 transitions. [2022-12-13 10:58:10,198 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48538961038961037 [2022-12-13 10:58:10,198 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 2691 transitions. [2022-12-13 10:58:10,198 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 2691 transitions. [2022-12-13 10:58:10,200 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 10:58:10,200 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 2691 transitions. [2022-12-13 10:58:10,206 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 96.10714285714286) internal successors, (2691), 28 states have internal predecessors, (2691), 0 states have call successors, (0), 0 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 10:58:10,213 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 198.0) internal successors, (5742), 29 states have internal predecessors, (5742), 0 states have call successors, (0), 0 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 10:58:10,214 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 198.0) internal successors, (5742), 29 states have internal predecessors, (5742), 0 states have call successors, (0), 0 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 10:58:10,214 INFO L175 Difference]: Start difference. First operand has 71 places, 35 transitions, 266 flow. Second operand 28 states and 2691 transitions. [2022-12-13 10:58:10,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 195 transitions, 1000 flow [2022-12-13 10:58:10,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 195 transitions, 896 flow, removed 41 selfloop flow, removed 11 redundant places. [2022-12-13 10:58:10,224 INFO L231 Difference]: Finished difference. Result has 91 places, 39 transitions, 266 flow [2022-12-13 10:58:10,225 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=28, PETRI_FLOW=266, PETRI_PLACES=91, PETRI_TRANSITIONS=39} [2022-12-13 10:58:10,225 INFO L288 CegarLoopForPetriNet]: 18 programPoint places, 73 predicate places. [2022-12-13 10:58:10,225 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 39 transitions, 266 flow [2022-12-13 10:58:10,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 90.20689655172414) internal successors, (2616), 29 states have internal predecessors, (2616), 0 states have call successors, (0), 0 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 10:58:10,226 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 10:58:10,226 INFO L209 CegarLoopForPetriNet]: trace histogram [26, 1, 1, 1, 1, 1, 1] [2022-12-13 10:58:10,231 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9d14ea7-b522-4323-8f86-c1599e70b3cb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 10:58:10,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9d14ea7-b522-4323-8f86-c1599e70b3cb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 10:58:10,427 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 10:58:10,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 10:58:10,427 INFO L85 PathProgramCache]: Analyzing trace with hash 2085373822, now seen corresponding path program 5 times [2022-12-13 10:58:10,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 10:58:10,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034175189] [2022-12-13 10:58:10,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 10:58:10,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 10:58:10,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:58:11,624 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 10:58:11,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 10:58:11,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034175189] [2022-12-13 10:58:11,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034175189] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 10:58:11,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852518371] [2022-12-13 10:58:11,625 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 10:58:11,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 10:58:11,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9d14ea7-b522-4323-8f86-c1599e70b3cb/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 10:58:11,626 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9d14ea7-b522-4323-8f86-c1599e70b3cb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 10:58:11,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9d14ea7-b522-4323-8f86-c1599e70b3cb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 10:58:11,701 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2022-12-13 10:58:11,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 10:58:11,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 86 conjunts are in the unsatisfiable core [2022-12-13 10:58:11,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 10:58:12,784 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 300 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 10:58:12,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 10:58:14,238 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 10:58:14,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852518371] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 10:58:14,239 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 10:58:14,239 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 81 [2022-12-13 10:58:14,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65955404] [2022-12-13 10:58:14,239 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 10:58:14,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-12-13 10:58:14,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 10:58:14,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-12-13 10:58:14,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1213, Invalid=5593, Unknown=0, NotChecked=0, Total=6806 [2022-12-13 10:58:15,838 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 198 [2022-12-13 10:58:15,842 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 39 transitions, 266 flow. Second operand has 83 states, 83 states have (on average 85.1566265060241) internal successors, (7068), 83 states have internal predecessors, (7068), 0 states have call successors, (0), 0 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 10:58:15,842 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 10:58:15,842 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 198 [2022-12-13 10:58:15,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 10:59:31,816 INFO L130 PetriNetUnfolder]: 109747/164642 cut-off events. [2022-12-13 10:59:31,816 INFO L131 PetriNetUnfolder]: For 1031959/1031959 co-relation queries the response was YES. [2022-12-13 10:59:32,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 530168 conditions, 164642 events. 109747/164642 cut-off events. For 1031959/1031959 co-relation queries the response was YES. Maximal size of possible extension queue 2952. Compared 1257559 event pairs, 103 based on Foata normal form. 225/123733 useless extension candidates. Maximal degree in co-relation 530130. Up to 34313 conditions per place. [2022-12-13 10:59:33,056 INFO L137 encePairwiseOnDemand]: 193/198 looper letters, 2034 selfloop transitions, 7285 changer transitions 0/9319 dead transitions. [2022-12-13 10:59:33,056 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 497 places, 9319 transitions, 87127 flow [2022-12-13 10:59:33,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 407 states. [2022-12-13 10:59:33,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 407 states. [2022-12-13 10:59:33,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 37441 transitions. [2022-12-13 10:59:33,122 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46460923733651005 [2022-12-13 10:59:33,123 INFO L72 ComplementDD]: Start complementDD. Operand 407 states and 37441 transitions. [2022-12-13 10:59:33,123 INFO L73 IsDeterministic]: Start isDeterministic. Operand 407 states and 37441 transitions. [2022-12-13 10:59:33,136 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 10:59:33,136 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 407 states and 37441 transitions. [2022-12-13 10:59:33,213 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 408 states, 407 states have (on average 91.992628992629) internal successors, (37441), 407 states have internal predecessors, (37441), 0 states have call successors, (0), 0 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 10:59:33,310 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 408 states, 408 states have (on average 198.0) internal successors, (80784), 408 states have internal predecessors, (80784), 0 states have call successors, (0), 0 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 10:59:33,322 INFO L81 ComplementDD]: Finished complementDD. Result has 408 states, 408 states have (on average 198.0) internal successors, (80784), 408 states have internal predecessors, (80784), 0 states have call successors, (0), 0 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 10:59:33,322 INFO L175 Difference]: Start difference. First operand has 91 places, 39 transitions, 266 flow. Second operand 407 states and 37441 transitions. [2022-12-13 10:59:33,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 497 places, 9319 transitions, 87127 flow [2022-12-13 10:59:46,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 474 places, 9319 transitions, 68333 flow, removed 4711 selfloop flow, removed 23 redundant places. [2022-12-13 10:59:46,089 INFO L231 Difference]: Finished difference. Result has 504 places, 7324 transitions, 44101 flow [2022-12-13 10:59:46,090 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=407, PETRI_FLOW=44101, PETRI_PLACES=504, PETRI_TRANSITIONS=7324} [2022-12-13 10:59:46,090 INFO L288 CegarLoopForPetriNet]: 18 programPoint places, 486 predicate places. [2022-12-13 10:59:46,090 INFO L495 AbstractCegarLoop]: Abstraction has has 504 places, 7324 transitions, 44101 flow [2022-12-13 10:59:46,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 85.1566265060241) internal successors, (7068), 83 states have internal predecessors, (7068), 0 states have call successors, (0), 0 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 10:59:46,092 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 10:59:46,092 INFO L209 CegarLoopForPetriNet]: trace histogram [26, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 10:59:46,096 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9d14ea7-b522-4323-8f86-c1599e70b3cb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 10:59:46,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9d14ea7-b522-4323-8f86-c1599e70b3cb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 10:59:46,293 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 10:59:46,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 10:59:46,293 INFO L85 PathProgramCache]: Analyzing trace with hash -35155118, now seen corresponding path program 1 times [2022-12-13 10:59:46,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 10:59:46,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658885614] [2022-12-13 10:59:46,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 10:59:46,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 10:59:46,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:59:47,823 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 0 proven. 352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 10:59:47,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 10:59:47,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658885614] [2022-12-13 10:59:47,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658885614] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 10:59:47,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536442203] [2022-12-13 10:59:47,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 10:59:47,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 10:59:47,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9d14ea7-b522-4323-8f86-c1599e70b3cb/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 10:59:47,825 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9d14ea7-b522-4323-8f86-c1599e70b3cb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 10:59:47,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9d14ea7-b522-4323-8f86-c1599e70b3cb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 10:59:47,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:59:47,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 88 conjunts are in the unsatisfiable core [2022-12-13 10:59:47,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 10:59:49,326 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 254 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 10:59:49,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 10:59:51,079 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 0 proven. 352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 10:59:51,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536442203] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 10:59:51,079 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 10:59:51,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 87 [2022-12-13 10:59:51,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413670368] [2022-12-13 10:59:51,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 10:59:51,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-12-13 10:59:51,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 10:59:51,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-12-13 10:59:51,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1258, Invalid=6574, Unknown=0, NotChecked=0, Total=7832 [2022-12-13 10:59:53,044 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 198 [2022-12-13 10:59:53,047 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 504 places, 7324 transitions, 44101 flow. Second operand has 89 states, 89 states have (on average 85.17977528089888) internal successors, (7581), 89 states have internal predecessors, (7581), 0 states have call successors, (0), 0 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 10:59:53,047 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 10:59:53,047 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 198 [2022-12-13 10:59:53,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand