./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-complex/workstealqueue_mutex-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b 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_b6bc9fcf-02ea-42f9-8e2c-d151ccc6bc0b/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6bc9fcf-02ea-42f9-8e2c-d151ccc6bc0b/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6bc9fcf-02ea-42f9-8e2c-d151ccc6bc0b/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6bc9fcf-02ea-42f9-8e2c-d151ccc6bc0b/bin/uautomizer-TMbwUNV5ro/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-complex/workstealqueue_mutex-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6bc9fcf-02ea-42f9-8e2c-d151ccc6bc0b/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6bc9fcf-02ea-42f9-8e2c-d151ccc6bc0b/bin/uautomizer-TMbwUNV5ro --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4ef1ebb9985ad6dadbe7cf99c72a7d7cbd507bc2d179a6afec5353fae325d63f --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-18 19:37:31,427 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 19:37:31,429 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 19:37:31,470 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 19:37:31,472 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 19:37:31,476 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 19:37:31,479 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 19:37:31,482 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 19:37:31,485 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 19:37:31,488 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 19:37:31,489 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 19:37:31,491 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 19:37:31,492 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 19:37:31,494 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 19:37:31,495 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 19:37:31,496 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 19:37:31,497 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 19:37:31,498 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 19:37:31,500 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 19:37:31,501 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 19:37:31,502 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 19:37:31,503 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 19:37:31,505 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 19:37:31,505 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 19:37:31,508 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 19:37:31,509 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 19:37:31,509 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 19:37:31,510 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 19:37:31,510 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 19:37:31,511 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 19:37:31,511 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 19:37:31,512 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 19:37:31,513 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 19:37:31,513 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 19:37:31,514 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 19:37:31,515 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 19:37:31,515 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 19:37:31,516 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 19:37:31,516 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 19:37:31,517 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 19:37:31,517 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 19:37:31,520 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6bc9fcf-02ea-42f9-8e2c-d151ccc6bc0b/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-18 19:37:31,551 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 19:37:31,552 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 19:37:31,552 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 19:37:31,552 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 19:37:31,553 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 19:37:31,554 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 19:37:31,554 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 19:37:31,554 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 19:37:31,555 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 19:37:31,555 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 19:37:31,556 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 19:37:31,556 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 19:37:31,556 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 19:37:31,556 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 19:37:31,557 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-18 19:37:31,557 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 19:37:31,557 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-18 19:37:31,557 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 19:37:31,557 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-18 19:37:31,557 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 19:37:31,558 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-18 19:37:31,558 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 19:37:31,558 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 19:37:31,558 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 19:37:31,558 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 19:37:31,559 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 19:37:31,560 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 19:37:31,560 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-18 19:37:31,561 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 19:37:31,561 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 19:37:31,561 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-18 19:37:31,561 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-18 19:37:31,561 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-18 19:37:31,562 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6bc9fcf-02ea-42f9-8e2c-d151ccc6bc0b/bin/uautomizer-TMbwUNV5ro/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6bc9fcf-02ea-42f9-8e2c-d151ccc6bc0b/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4ef1ebb9985ad6dadbe7cf99c72a7d7cbd507bc2d179a6afec5353fae325d63f [2022-11-18 19:37:31,857 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 19:37:31,891 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 19:37:31,895 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 19:37:31,896 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 19:37:31,897 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 19:37:31,899 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6bc9fcf-02ea-42f9-8e2c-d151ccc6bc0b/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/pthread-complex/workstealqueue_mutex-2.i [2022-11-18 19:37:31,978 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6bc9fcf-02ea-42f9-8e2c-d151ccc6bc0b/bin/uautomizer-TMbwUNV5ro/data/8473dee7f/73fc67f6c0eb45929d2f7f60fdc50a26/FLAGf03c3221d [2022-11-18 19:37:32,698 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 19:37:32,699 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6bc9fcf-02ea-42f9-8e2c-d151ccc6bc0b/sv-benchmarks/c/pthread-complex/workstealqueue_mutex-2.i [2022-11-18 19:37:32,717 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6bc9fcf-02ea-42f9-8e2c-d151ccc6bc0b/bin/uautomizer-TMbwUNV5ro/data/8473dee7f/73fc67f6c0eb45929d2f7f60fdc50a26/FLAGf03c3221d [2022-11-18 19:37:32,877 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6bc9fcf-02ea-42f9-8e2c-d151ccc6bc0b/bin/uautomizer-TMbwUNV5ro/data/8473dee7f/73fc67f6c0eb45929d2f7f60fdc50a26 [2022-11-18 19:37:32,880 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 19:37:32,883 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 19:37:32,891 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 19:37:32,891 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 19:37:32,895 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 19:37:32,896 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 07:37:32" (1/1) ... [2022-11-18 19:37:32,897 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@118e2bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:37:32, skipping insertion in model container [2022-11-18 19:37:32,897 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 07:37:32" (1/1) ... [2022-11-18 19:37:32,905 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 19:37:32,989 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 19:37:34,041 WARN L234 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_b6bc9fcf-02ea-42f9-8e2c-d151ccc6bc0b/sv-benchmarks/c/pthread-complex/workstealqueue_mutex-2.i[76469,76482] [2022-11-18 19:37:34,087 WARN L234 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_b6bc9fcf-02ea-42f9-8e2c-d151ccc6bc0b/sv-benchmarks/c/pthread-complex/workstealqueue_mutex-2.i[79042,79055] [2022-11-18 19:37:34,097 WARN L234 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_b6bc9fcf-02ea-42f9-8e2c-d151ccc6bc0b/sv-benchmarks/c/pthread-complex/workstealqueue_mutex-2.i[79451,79464] [2022-11-18 19:37:34,113 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 19:37:34,138 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 19:37:34,195 WARN L234 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_b6bc9fcf-02ea-42f9-8e2c-d151ccc6bc0b/sv-benchmarks/c/pthread-complex/workstealqueue_mutex-2.i[76469,76482] [2022-11-18 19:37:34,221 WARN L234 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_b6bc9fcf-02ea-42f9-8e2c-d151ccc6bc0b/sv-benchmarks/c/pthread-complex/workstealqueue_mutex-2.i[79042,79055] [2022-11-18 19:37:34,225 WARN L234 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_b6bc9fcf-02ea-42f9-8e2c-d151ccc6bc0b/sv-benchmarks/c/pthread-complex/workstealqueue_mutex-2.i[79451,79464] [2022-11-18 19:37:34,234 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 19:37:34,351 INFO L208 MainTranslator]: Completed translation [2022-11-18 19:37:34,352 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:37:34 WrapperNode [2022-11-18 19:37:34,352 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 19:37:34,353 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 19:37:34,353 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 19:37:34,354 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 19:37:34,361 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:37:34" (1/1) ... [2022-11-18 19:37:34,388 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:37:34" (1/1) ... [2022-11-18 19:37:34,476 INFO L138 Inliner]: procedures = 489, calls = 127, calls flagged for inlining = 45, calls inlined = 117, statements flattened = 1715 [2022-11-18 19:37:34,476 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 19:37:34,477 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 19:37:34,477 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 19:37:34,477 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 19:37:34,487 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:37:34" (1/1) ... [2022-11-18 19:37:34,487 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:37:34" (1/1) ... [2022-11-18 19:37:34,502 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:37:34" (1/1) ... [2022-11-18 19:37:34,502 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:37:34" (1/1) ... [2022-11-18 19:37:34,542 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:37:34" (1/1) ... [2022-11-18 19:37:34,551 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:37:34" (1/1) ... [2022-11-18 19:37:34,566 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:37:34" (1/1) ... [2022-11-18 19:37:34,574 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:37:34" (1/1) ... [2022-11-18 19:37:34,598 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 19:37:34,609 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 19:37:34,609 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 19:37:34,609 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 19:37:34,610 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:37:34" (1/1) ... [2022-11-18 19:37:34,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 19:37:34,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6bc9fcf-02ea-42f9-8e2c-d151ccc6bc0b/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:37:34,660 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6bc9fcf-02ea-42f9-8e2c-d151ccc6bc0b/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 19:37:34,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6bc9fcf-02ea-42f9-8e2c-d151ccc6bc0b/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 19:37:34,718 INFO L130 BoogieDeclarations]: Found specification of procedure Stealer [2022-11-18 19:37:34,719 INFO L138 BoogieDeclarations]: Found implementation of procedure Stealer [2022-11-18 19:37:34,720 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-18 19:37:34,720 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-18 19:37:34,720 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-18 19:37:34,721 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-18 19:37:34,721 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-18 19:37:34,721 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-18 19:37:34,721 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-18 19:37:34,721 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 19:37:34,721 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 19:37:34,721 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-18 19:37:34,722 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-18 19:37:34,722 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-18 19:37:34,722 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-18 19:37:34,724 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-18 19:37:35,122 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 19:37:35,124 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 19:37:37,268 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 19:37:37,714 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 19:37:37,714 INFO L300 CfgBuilder]: Removed 11 assume(true) statements. [2022-11-18 19:37:37,718 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 07:37:37 BoogieIcfgContainer [2022-11-18 19:37:37,719 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 19:37:37,721 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 19:37:37,721 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 19:37:37,725 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 19:37:37,725 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 07:37:32" (1/3) ... [2022-11-18 19:37:37,726 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1273b96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 07:37:37, skipping insertion in model container [2022-11-18 19:37:37,726 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:37:34" (2/3) ... [2022-11-18 19:37:37,726 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1273b96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 07:37:37, skipping insertion in model container [2022-11-18 19:37:37,726 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 07:37:37" (3/3) ... [2022-11-18 19:37:37,727 INFO L112 eAbstractionObserver]: Analyzing ICFG workstealqueue_mutex-2.i [2022-11-18 19:37:37,736 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-18 19:37:37,747 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 19:37:37,747 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2022-11-18 19:37:37,747 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-18 19:37:37,903 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-11-18 19:37:37,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1621 places, 1666 transitions, 3340 flow [2022-11-18 19:37:39,431 INFO L130 PetriNetUnfolder]: 89/3089 cut-off events. [2022-11-18 19:37:39,432 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-18 19:37:39,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3095 conditions, 3089 events. 89/3089 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 14274 event pairs, 0 based on Foata normal form. 0/2987 useless extension candidates. Maximal degree in co-relation 1576. Up to 6 conditions per place. [2022-11-18 19:37:39,480 INFO L82 GeneralOperation]: Start removeDead. Operand has 1621 places, 1666 transitions, 3340 flow [2022-11-18 19:37:39,504 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1621 places, 1666 transitions, 3340 flow [2022-11-18 19:37:39,522 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 19:37:39,534 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;@43562237, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 19:37:39,534 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-11-18 19:37:39,554 INFO L130 PetriNetUnfolder]: 11/179 cut-off events. [2022-11-18 19:37:39,555 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-18 19:37:39,555 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:37:39,556 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:37:39,557 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-18 19:37:39,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:37:39,563 INFO L85 PathProgramCache]: Analyzing trace with hash 1261699419, now seen corresponding path program 1 times [2022-11-18 19:37:39,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:37:39,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041616638] [2022-11-18 19:37:39,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:37:39,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:37:39,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:37:40,076 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-18 19:37:40,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:37:40,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041616638] [2022-11-18 19:37:40,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041616638] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:37:40,078 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:37:40,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 19:37:40,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174014779] [2022-11-18 19:37:40,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:37:40,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-18 19:37:40,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:37:40,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-18 19:37:40,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 19:37:40,125 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1593 out of 1666 [2022-11-18 19:37:40,134 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1621 places, 1666 transitions, 3340 flow. Second operand has 2 states, 2 states have (on average 1595.0) internal successors, (3190), 2 states have internal predecessors, (3190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:37:40,134 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:37:40,134 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1593 of 1666 [2022-11-18 19:37:40,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:37:43,407 INFO L130 PetriNetUnfolder]: 360/9201 cut-off events. [2022-11-18 19:37:43,408 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-18 19:37:43,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9675 conditions, 9201 events. 360/9201 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 78472 event pairs, 176 based on Foata normal form. 161/9137 useless extension candidates. Maximal degree in co-relation 8127. Up to 468 conditions per place. [2022-11-18 19:37:43,480 INFO L137 encePairwiseOnDemand]: 1650/1666 looper letters, 52 selfloop transitions, 0 changer transitions 0/1645 dead transitions. [2022-11-18 19:37:43,480 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1617 places, 1645 transitions, 3402 flow [2022-11-18 19:37:43,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 19:37:43,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-18 19:37:43,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 3254 transitions. [2022-11-18 19:37:43,509 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9765906362545018 [2022-11-18 19:37:43,510 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 3254 transitions. [2022-11-18 19:37:43,510 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 3254 transitions. [2022-11-18 19:37:43,516 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:37:43,519 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 3254 transitions. [2022-11-18 19:37:43,533 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 1627.0) internal successors, (3254), 2 states have internal predecessors, (3254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:37:43,551 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 1666.0) internal successors, (4998), 3 states have internal predecessors, (4998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:37:43,555 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 1666.0) internal successors, (4998), 3 states have internal predecessors, (4998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:37:43,557 INFO L175 Difference]: Start difference. First operand has 1621 places, 1666 transitions, 3340 flow. Second operand 2 states and 3254 transitions. [2022-11-18 19:37:43,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1617 places, 1645 transitions, 3402 flow [2022-11-18 19:37:43,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1617 places, 1645 transitions, 3402 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-18 19:37:43,607 INFO L231 Difference]: Finished difference. Result has 1617 places, 1645 transitions, 3298 flow [2022-11-18 19:37:43,611 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1666, PETRI_DIFFERENCE_MINUEND_FLOW=3298, PETRI_DIFFERENCE_MINUEND_PLACES=1616, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1645, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1645, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=3298, PETRI_PLACES=1617, PETRI_TRANSITIONS=1645} [2022-11-18 19:37:43,615 INFO L288 CegarLoopForPetriNet]: 1621 programPoint places, -4 predicate places. [2022-11-18 19:37:43,616 INFO L495 AbstractCegarLoop]: Abstraction has has 1617 places, 1645 transitions, 3298 flow [2022-11-18 19:37:43,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 1595.0) internal successors, (3190), 2 states have internal predecessors, (3190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:37:43,618 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:37:43,619 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:37:43,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-18 19:37:43,619 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-18 19:37:43,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:37:43,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1679958180, now seen corresponding path program 1 times [2022-11-18 19:37:43,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:37:43,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735019097] [2022-11-18 19:37:43,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:37:43,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:37:43,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:37:43,865 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-18 19:37:43,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:37:43,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735019097] [2022-11-18 19:37:43,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735019097] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:37:43,870 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:37:43,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 19:37:43,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692501120] [2022-11-18 19:37:43,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:37:43,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 19:37:43,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:37:43,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 19:37:43,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 19:37:43,885 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1555 out of 1666 [2022-11-18 19:37:43,893 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1617 places, 1645 transitions, 3298 flow. Second operand has 3 states, 3 states have (on average 1559.0) internal successors, (4677), 3 states have internal predecessors, (4677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:37:43,893 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:37:43,893 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1555 of 1666 [2022-11-18 19:37:43,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:37:50,269 INFO L130 PetriNetUnfolder]: 829/14839 cut-off events. [2022-11-18 19:37:50,269 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-18 19:37:50,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16040 conditions, 14839 events. 829/14839 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 131637 event pairs, 232 based on Foata normal form. 0/14494 useless extension candidates. Maximal degree in co-relation 16036. Up to 611 conditions per place. [2022-11-18 19:37:50,370 INFO L137 encePairwiseOnDemand]: 1648/1666 looper letters, 143 selfloop transitions, 12 changer transitions 9/1713 dead transitions. [2022-11-18 19:37:50,371 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1619 places, 1713 transitions, 3750 flow [2022-11-18 19:37:50,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 19:37:50,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-18 19:37:50,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 4829 transitions. [2022-11-18 19:37:50,381 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.966186474589836 [2022-11-18 19:37:50,381 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 4829 transitions. [2022-11-18 19:37:50,381 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 4829 transitions. [2022-11-18 19:37:50,384 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:37:50,384 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 4829 transitions. [2022-11-18 19:37:50,395 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 1609.6666666666667) internal successors, (4829), 3 states have internal predecessors, (4829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:37:50,407 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1666.0) internal successors, (6664), 4 states have internal predecessors, (6664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:37:50,412 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1666.0) internal successors, (6664), 4 states have internal predecessors, (6664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:37:50,412 INFO L175 Difference]: Start difference. First operand has 1617 places, 1645 transitions, 3298 flow. Second operand 3 states and 4829 transitions. [2022-11-18 19:37:50,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1619 places, 1713 transitions, 3750 flow [2022-11-18 19:37:50,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1619 places, 1713 transitions, 3750 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-18 19:37:50,443 INFO L231 Difference]: Finished difference. Result has 1620 places, 1642 transitions, 3346 flow [2022-11-18 19:37:50,446 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1666, PETRI_DIFFERENCE_MINUEND_FLOW=3298, PETRI_DIFFERENCE_MINUEND_PLACES=1617, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1645, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1633, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=3346, PETRI_PLACES=1620, PETRI_TRANSITIONS=1642} [2022-11-18 19:37:50,447 INFO L288 CegarLoopForPetriNet]: 1621 programPoint places, -1 predicate places. [2022-11-18 19:37:50,447 INFO L495 AbstractCegarLoop]: Abstraction has has 1620 places, 1642 transitions, 3346 flow [2022-11-18 19:37:50,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1559.0) internal successors, (4677), 3 states have internal predecessors, (4677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:37:50,450 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:37:50,451 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:37:50,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-18 19:37:50,451 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-18 19:37:50,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:37:50,452 INFO L85 PathProgramCache]: Analyzing trace with hash -244315289, now seen corresponding path program 1 times [2022-11-18 19:37:50,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:37:50,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163332960] [2022-11-18 19:37:50,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:37:50,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:37:50,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:37:50,795 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-18 19:37:50,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:37:50,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163332960] [2022-11-18 19:37:50,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163332960] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:37:50,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951036634] [2022-11-18 19:37:50,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:37:50,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:37:50,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6bc9fcf-02ea-42f9-8e2c-d151ccc6bc0b/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:37:50,807 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6bc9fcf-02ea-42f9-8e2c-d151ccc6bc0b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:37:50,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6bc9fcf-02ea-42f9-8e2c-d151ccc6bc0b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-18 19:37:51,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:37:51,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-18 19:37:51,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:37:51,107 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-18 19:37:51,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:37:51,170 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-18 19:37:51,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951036634] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:37:51,170 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:37:51,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-18 19:37:51,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271265118] [2022-11-18 19:37:51,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:37:51,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 19:37:51,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:37:51,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 19:37:51,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-18 19:37:51,192 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1554 out of 1666 [2022-11-18 19:37:51,228 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1620 places, 1642 transitions, 3346 flow. Second operand has 10 states, 10 states have (on average 1556.9) internal successors, (15569), 10 states have internal predecessors, (15569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:37:51,228 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:37:51,228 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1554 of 1666 [2022-11-18 19:37:51,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:37:57,790 INFO L130 PetriNetUnfolder]: 769/16374 cut-off events. [2022-11-18 19:37:57,790 INFO L131 PetriNetUnfolder]: For 28/28 co-relation queries the response was YES. [2022-11-18 19:37:57,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17605 conditions, 16374 events. 769/16374 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 146868 event pairs, 420 based on Foata normal form. 2/16006 useless extension candidates. Maximal degree in co-relation 17599. Up to 525 conditions per place. [2022-11-18 19:37:57,877 INFO L137 encePairwiseOnDemand]: 1645/1666 looper letters, 141 selfloop transitions, 26 changer transitions 2/1717 dead transitions. [2022-11-18 19:37:57,878 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1621 places, 1717 transitions, 3836 flow [2022-11-18 19:37:57,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 19:37:57,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-18 19:37:57,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 14157 transitions. [2022-11-18 19:37:57,905 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9441776710684273 [2022-11-18 19:37:57,906 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 14157 transitions. [2022-11-18 19:37:57,906 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 14157 transitions. [2022-11-18 19:37:57,913 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:37:57,914 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 14157 transitions. [2022-11-18 19:37:57,941 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 1573.0) internal successors, (14157), 9 states have internal predecessors, (14157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:37:57,967 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 1666.0) internal successors, (16660), 10 states have internal predecessors, (16660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:37:57,973 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 1666.0) internal successors, (16660), 10 states have internal predecessors, (16660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:37:57,973 INFO L175 Difference]: Start difference. First operand has 1620 places, 1642 transitions, 3346 flow. Second operand 9 states and 14157 transitions. [2022-11-18 19:37:57,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1621 places, 1717 transitions, 3836 flow [2022-11-18 19:37:57,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1620 places, 1717 transitions, 3824 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-18 19:37:58,002 INFO L231 Difference]: Finished difference. Result has 1623 places, 1652 transitions, 3460 flow [2022-11-18 19:37:58,005 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1666, PETRI_DIFFERENCE_MINUEND_FLOW=3334, PETRI_DIFFERENCE_MINUEND_PLACES=1612, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1642, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1619, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3460, PETRI_PLACES=1623, PETRI_TRANSITIONS=1652} [2022-11-18 19:37:58,006 INFO L288 CegarLoopForPetriNet]: 1621 programPoint places, 2 predicate places. [2022-11-18 19:37:58,006 INFO L495 AbstractCegarLoop]: Abstraction has has 1623 places, 1652 transitions, 3460 flow [2022-11-18 19:37:58,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1556.9) internal successors, (15569), 10 states have internal predecessors, (15569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:37:58,010 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:37:58,011 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:37:58,032 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6bc9fcf-02ea-42f9-8e2c-d151ccc6bc0b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-18 19:37:58,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6bc9fcf-02ea-42f9-8e2c-d151ccc6bc0b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-11-18 19:37:58,233 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-18 19:37:58,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:37:58,234 INFO L85 PathProgramCache]: Analyzing trace with hash 1516609085, now seen corresponding path program 2 times [2022-11-18 19:37:58,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:37:58,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406286631] [2022-11-18 19:37:58,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:37:58,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:37:58,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:37:58,721 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-18 19:37:58,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:37:58,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406286631] [2022-11-18 19:37:58,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406286631] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:37:58,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105122045] [2022-11-18 19:37:58,722 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 19:37:58,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:37:58,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6bc9fcf-02ea-42f9-8e2c-d151ccc6bc0b/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:37:58,724 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6bc9fcf-02ea-42f9-8e2c-d151ccc6bc0b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:37:58,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6bc9fcf-02ea-42f9-8e2c-d151ccc6bc0b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-18 19:37:59,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 19:37:59,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:37:59,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-18 19:37:59,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:37:59,254 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-18 19:37:59,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:37:59,406 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-18 19:37:59,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105122045] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:37:59,407 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:37:59,407 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 11 [2022-11-18 19:37:59,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120868712] [2022-11-18 19:37:59,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:37:59,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-18 19:37:59,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:37:59,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-18 19:37:59,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-11-18 19:37:59,442 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1554 out of 1666 [2022-11-18 19:37:59,456 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1623 places, 1652 transitions, 3460 flow. Second operand has 11 states, 11 states have (on average 1556.909090909091) internal successors, (17126), 11 states have internal predecessors, (17126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:37:59,457 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:37:59,457 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1554 of 1666 [2022-11-18 19:37:59,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:38:06,324 INFO L130 PetriNetUnfolder]: 835/16693 cut-off events. [2022-11-18 19:38:06,325 INFO L131 PetriNetUnfolder]: For 192/192 co-relation queries the response was YES. [2022-11-18 19:38:06,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18123 conditions, 16693 events. 835/16693 cut-off events. For 192/192 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 149531 event pairs, 370 based on Foata normal form. 1/16313 useless extension candidates. Maximal degree in co-relation 18115. Up to 577 conditions per place. [2022-11-18 19:38:06,428 INFO L137 encePairwiseOnDemand]: 1646/1666 looper letters, 143 selfloop transitions, 29 changer transitions 0/1720 dead transitions. [2022-11-18 19:38:06,428 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1634 places, 1720 transitions, 3958 flow [2022-11-18 19:38:06,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-18 19:38:06,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-18 19:38:06,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 18821 transitions. [2022-11-18 19:38:06,463 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9414265706282513 [2022-11-18 19:38:06,463 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 18821 transitions. [2022-11-18 19:38:06,464 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 18821 transitions. [2022-11-18 19:38:06,473 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:38:06,473 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 18821 transitions. [2022-11-18 19:38:06,504 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 1568.4166666666667) internal successors, (18821), 12 states have internal predecessors, (18821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:06,536 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 1666.0) internal successors, (21658), 13 states have internal predecessors, (21658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:06,544 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 1666.0) internal successors, (21658), 13 states have internal predecessors, (21658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:06,544 INFO L175 Difference]: Start difference. First operand has 1623 places, 1652 transitions, 3460 flow. Second operand 12 states and 18821 transitions. [2022-11-18 19:38:06,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1634 places, 1720 transitions, 3958 flow [2022-11-18 19:38:06,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1633 places, 1720 transitions, 3934 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-18 19:38:06,797 INFO L231 Difference]: Finished difference. Result has 1637 places, 1656 transitions, 3553 flow [2022-11-18 19:38:06,800 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1666, PETRI_DIFFERENCE_MINUEND_FLOW=3438, PETRI_DIFFERENCE_MINUEND_PLACES=1622, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1652, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1624, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3553, PETRI_PLACES=1637, PETRI_TRANSITIONS=1656} [2022-11-18 19:38:06,801 INFO L288 CegarLoopForPetriNet]: 1621 programPoint places, 16 predicate places. [2022-11-18 19:38:06,801 INFO L495 AbstractCegarLoop]: Abstraction has has 1637 places, 1656 transitions, 3553 flow [2022-11-18 19:38:06,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1556.909090909091) internal successors, (17126), 11 states have internal predecessors, (17126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:06,806 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:38:06,807 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:38:06,815 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6bc9fcf-02ea-42f9-8e2c-d151ccc6bc0b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-18 19:38:07,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6bc9fcf-02ea-42f9-8e2c-d151ccc6bc0b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:38:07,014 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-18 19:38:07,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:38:07,015 INFO L85 PathProgramCache]: Analyzing trace with hash 216229128, now seen corresponding path program 3 times [2022-11-18 19:38:07,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:38:07,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103689973] [2022-11-18 19:38:07,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:38:07,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:38:07,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 19:38:07,086 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-18 19:38:07,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 19:38:07,186 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-18 19:38:07,186 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-18 19:38:07,188 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2022-11-18 19:38:07,194 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2022-11-18 19:38:07,194 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2022-11-18 19:38:07,195 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2022-11-18 19:38:07,195 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2022-11-18 19:38:07,195 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2022-11-18 19:38:07,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-18 19:38:07,196 INFO L444 BasicCegarLoop]: Path program histogram: [3, 1, 1] [2022-11-18 19:38:07,198 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-18 19:38:07,198 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-18 19:38:07,342 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-18 19:38:07,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1768 places, 1816 transitions, 3650 flow [2022-11-18 19:38:08,872 INFO L130 PetriNetUnfolder]: 140/4707 cut-off events. [2022-11-18 19:38:08,872 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-11-18 19:38:08,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4721 conditions, 4707 events. 140/4707 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 27225 event pairs, 0 based on Foata normal form. 0/4547 useless extension candidates. Maximal degree in co-relation 3091. Up to 9 conditions per place. [2022-11-18 19:38:08,929 INFO L82 GeneralOperation]: Start removeDead. Operand has 1768 places, 1816 transitions, 3650 flow [2022-11-18 19:38:08,949 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1768 places, 1816 transitions, 3650 flow [2022-11-18 19:38:08,950 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 19:38:08,951 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;@43562237, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 19:38:08,951 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-11-18 19:38:08,966 INFO L130 PetriNetUnfolder]: 12/192 cut-off events. [2022-11-18 19:38:08,966 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-18 19:38:08,967 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:38:08,967 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:38:08,967 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-18 19:38:08,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:38:08,968 INFO L85 PathProgramCache]: Analyzing trace with hash -86781841, now seen corresponding path program 1 times [2022-11-18 19:38:08,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:38:08,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244052009] [2022-11-18 19:38:08,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:38:08,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:38:08,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:38:09,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:38:09,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:38:09,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244052009] [2022-11-18 19:38:09,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244052009] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:38:09,025 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:38:09,025 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 19:38:09,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077803992] [2022-11-18 19:38:09,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:38:09,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-18 19:38:09,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:38:09,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-18 19:38:09,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 19:38:09,031 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1736 out of 1816 [2022-11-18 19:38:09,034 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1768 places, 1816 transitions, 3650 flow. Second operand has 2 states, 2 states have (on average 1739.5) internal successors, (3479), 2 states have internal predecessors, (3479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:09,034 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:38:09,035 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1736 of 1816 [2022-11-18 19:38:09,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:38:24,432 INFO L130 PetriNetUnfolder]: 2938/48843 cut-off events. [2022-11-18 19:38:24,432 INFO L131 PetriNetUnfolder]: For 69/73 co-relation queries the response was YES. [2022-11-18 19:38:24,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52380 conditions, 48843 events. 2938/48843 cut-off events. For 69/73 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 632961 event pairs, 1964 based on Foata normal form. 1133/48779 useless extension candidates. Maximal degree in co-relation 9595. Up to 3491 conditions per place. [2022-11-18 19:38:25,023 INFO L137 encePairwiseOnDemand]: 1799/1816 looper letters, 58 selfloop transitions, 0 changer transitions 0/1794 dead transitions. [2022-11-18 19:38:25,024 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1764 places, 1794 transitions, 3722 flow [2022-11-18 19:38:25,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 19:38:25,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-18 19:38:25,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 3547 transitions. [2022-11-18 19:38:25,030 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9765969162995595 [2022-11-18 19:38:25,031 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 3547 transitions. [2022-11-18 19:38:25,031 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 3547 transitions. [2022-11-18 19:38:25,032 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:38:25,033 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 3547 transitions. [2022-11-18 19:38:25,038 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 1773.5) internal successors, (3547), 2 states have internal predecessors, (3547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:25,043 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 1816.0) internal successors, (5448), 3 states have internal predecessors, (5448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:25,045 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 1816.0) internal successors, (5448), 3 states have internal predecessors, (5448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:25,045 INFO L175 Difference]: Start difference. First operand has 1768 places, 1816 transitions, 3650 flow. Second operand 2 states and 3547 transitions. [2022-11-18 19:38:25,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1764 places, 1794 transitions, 3722 flow [2022-11-18 19:38:25,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1764 places, 1794 transitions, 3722 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-18 19:38:25,074 INFO L231 Difference]: Finished difference. Result has 1764 places, 1794 transitions, 3606 flow [2022-11-18 19:38:25,076 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1816, PETRI_DIFFERENCE_MINUEND_FLOW=3606, PETRI_DIFFERENCE_MINUEND_PLACES=1763, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1794, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1794, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=3606, PETRI_PLACES=1764, PETRI_TRANSITIONS=1794} [2022-11-18 19:38:25,080 INFO L288 CegarLoopForPetriNet]: 1768 programPoint places, -4 predicate places. [2022-11-18 19:38:25,084 INFO L495 AbstractCegarLoop]: Abstraction has has 1764 places, 1794 transitions, 3606 flow [2022-11-18 19:38:25,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 1739.5) internal successors, (3479), 2 states have internal predecessors, (3479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:25,086 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:38:25,086 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:38:25,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-18 19:38:25,087 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-18 19:38:25,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:38:25,088 INFO L85 PathProgramCache]: Analyzing trace with hash -160746572, now seen corresponding path program 1 times [2022-11-18 19:38:25,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:38:25,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681461643] [2022-11-18 19:38:25,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:38:25,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:38:25,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:38:25,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:38:25,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:38:25,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681461643] [2022-11-18 19:38:25,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681461643] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:38:25,191 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:38:25,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 19:38:25,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890357794] [2022-11-18 19:38:25,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:38:25,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 19:38:25,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:38:25,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 19:38:25,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 19:38:25,199 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1698 out of 1816 [2022-11-18 19:38:25,204 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1764 places, 1794 transitions, 3606 flow. Second operand has 3 states, 3 states have (on average 1703.6666666666667) internal successors, (5111), 3 states have internal predecessors, (5111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:25,204 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:38:25,204 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1698 of 1816 [2022-11-18 19:38:25,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand