./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff 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_7db4b714-22e4-4271-8255-bb4df4ae211f/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db4b714-22e4-4271-8255-bb4df4ae211f/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db4b714-22e4-4271-8255-bb4df4ae211f/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db4b714-22e4-4271-8255-bb4df4ae211f/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db4b714-22e4-4271-8255-bb4df4ae211f/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db4b714-22e4-4271-8255-bb4df4ae211f/bin/uautomizer-verify-uCwYo4JHxu --witnessprinter.witness.filename witness --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 3c66e95d4d33d89eed9ab2f285249dafeef639a3ca9f6d879b87b944d1b8c0ce --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:41:01,396 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:41:01,473 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db4b714-22e4-4271-8255-bb4df4ae211f/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 07:41:01,479 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:41:01,480 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:41:01,526 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:41:01,527 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:41:01,528 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:41:01,529 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:41:01,529 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:41:01,530 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:41:01,531 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:41:01,532 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:41:01,532 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:41:01,533 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:41:01,534 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:41:01,534 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:41:01,535 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:41:01,535 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:41:01,535 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:41:01,536 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:41:01,537 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:41:01,537 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:41:01,538 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:41:01,538 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:41:01,538 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:41:01,539 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:41:01,539 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:41:01,540 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:41:01,540 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:41:01,553 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:41:01,553 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:41:01,553 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:41:01,554 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:41:01,554 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:41:01,555 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:41:01,555 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:41:01,555 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:41:01,555 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:41:01,556 INFO L153 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_7db4b714-22e4-4271-8255-bb4df4ae211f/bin/uautomizer-verify-uCwYo4JHxu/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db4b714-22e4-4271-8255-bb4df4ae211f/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3c66e95d4d33d89eed9ab2f285249dafeef639a3ca9f6d879b87b944d1b8c0ce [2023-11-19 07:41:01,914 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:41:01,951 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:41:01,954 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:41:01,956 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:41:01,957 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:41:01,958 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db4b714-22e4-4271-8255-bb4df4ae211f/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c [2023-11-19 07:41:05,023 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:41:05,301 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:41:05,302 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db4b714-22e4-4271-8255-bb4df4ae211f/sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c [2023-11-19 07:41:05,312 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db4b714-22e4-4271-8255-bb4df4ae211f/bin/uautomizer-verify-uCwYo4JHxu/data/6b3deb63a/971b3573e55f404ab351e36787e382a6/FLAGbd196b81c [2023-11-19 07:41:05,330 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db4b714-22e4-4271-8255-bb4df4ae211f/bin/uautomizer-verify-uCwYo4JHxu/data/6b3deb63a/971b3573e55f404ab351e36787e382a6 [2023-11-19 07:41:05,339 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:41:05,341 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:41:05,344 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:41:05,344 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:41:05,349 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:41:05,350 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:41:05" (1/1) ... [2023-11-19 07:41:05,354 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56637b2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:05, skipping insertion in model container [2023-11-19 07:41:05,355 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:41:05" (1/1) ... [2023-11-19 07:41:05,384 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:41:05,622 WARN L240 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_7db4b714-22e4-4271-8255-bb4df4ae211f/sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c[2113,2126] [2023-11-19 07:41:05,629 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:41:05,642 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:41:05,677 WARN L240 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_7db4b714-22e4-4271-8255-bb4df4ae211f/sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c[2113,2126] [2023-11-19 07:41:05,684 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:41:05,694 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 07:41:05,694 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 07:41:05,702 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:41:05,703 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:05 WrapperNode [2023-11-19 07:41:05,703 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:41:05,705 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:41:05,705 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:41:05,705 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:41:05,712 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:05" (1/1) ... [2023-11-19 07:41:05,722 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:05" (1/1) ... [2023-11-19 07:41:05,755 INFO L138 Inliner]: procedures = 21, calls = 25, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 79 [2023-11-19 07:41:05,755 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:41:05,756 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:41:05,757 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:41:05,757 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:41:05,768 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:05" (1/1) ... [2023-11-19 07:41:05,768 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:05" (1/1) ... [2023-11-19 07:41:05,780 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:05" (1/1) ... [2023-11-19 07:41:05,782 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:05" (1/1) ... [2023-11-19 07:41:05,792 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:05" (1/1) ... [2023-11-19 07:41:05,800 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:05" (1/1) ... [2023-11-19 07:41:05,802 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:05" (1/1) ... [2023-11-19 07:41:05,808 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:05" (1/1) ... [2023-11-19 07:41:05,811 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:41:05,814 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:41:05,815 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:41:05,816 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:41:05,817 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:05" (1/1) ... [2023-11-19 07:41:05,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:41:05,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db4b714-22e4-4271-8255-bb4df4ae211f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:41:05,853 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db4b714-22e4-4271-8255-bb4df4ae211f/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:41:05,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db4b714-22e4-4271-8255-bb4df4ae211f/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:41:05,933 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:41:05,933 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-19 07:41:05,933 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-19 07:41:05,934 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-19 07:41:05,934 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-19 07:41:05,934 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:41:05,934 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 07:41:05,934 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 07:41:05,934 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-19 07:41:05,935 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-19 07:41:05,935 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:41:05,935 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:41:05,935 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 07:41:05,935 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 07:41:05,948 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-19 07:41:06,073 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:41:06,075 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:41:06,270 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:41:06,318 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:41:06,319 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-19 07:41:06,325 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:41:06 BoogieIcfgContainer [2023-11-19 07:41:06,325 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:41:06,327 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:41:06,327 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:41:06,331 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:41:06,332 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:41:05" (1/3) ... [2023-11-19 07:41:06,333 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4979d5f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:41:06, skipping insertion in model container [2023-11-19 07:41:06,333 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:05" (2/3) ... [2023-11-19 07:41:06,334 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4979d5f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:41:06, skipping insertion in model container [2023-11-19 07:41:06,334 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:41:06" (3/3) ... [2023-11-19 07:41:06,336 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-figure1-alt.wvr.c [2023-11-19 07:41:06,345 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-19 07:41:06,356 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:41:06,357 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 07:41:06,357 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 07:41:06,450 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-19 07:41:06,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 92 places, 91 transitions, 196 flow [2023-11-19 07:41:06,551 INFO L124 PetriNetUnfolderBase]: 6/89 cut-off events. [2023-11-19 07:41:06,551 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 07:41:06,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98 conditions, 89 events. 6/89 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 56 event pairs, 0 based on Foata normal form. 0/82 useless extension candidates. Maximal degree in co-relation 52. Up to 2 conditions per place. [2023-11-19 07:41:06,557 INFO L82 GeneralOperation]: Start removeDead. Operand has 92 places, 91 transitions, 196 flow [2023-11-19 07:41:06,561 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 81 places, 80 transitions, 172 flow [2023-11-19 07:41:06,565 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:41:06,576 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 81 places, 80 transitions, 172 flow [2023-11-19 07:41:06,579 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 81 places, 80 transitions, 172 flow [2023-11-19 07:41:06,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 81 places, 80 transitions, 172 flow [2023-11-19 07:41:06,622 INFO L124 PetriNetUnfolderBase]: 6/80 cut-off events. [2023-11-19 07:41:06,622 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 07:41:06,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89 conditions, 80 events. 6/80 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 55 event pairs, 0 based on Foata normal form. 0/74 useless extension candidates. Maximal degree in co-relation 52. Up to 2 conditions per place. [2023-11-19 07:41:06,625 INFO L119 LiptonReduction]: Number of co-enabled transitions 648 [2023-11-19 07:41:09,198 INFO L134 LiptonReduction]: Checked pairs total: 684 [2023-11-19 07:41:09,201 INFO L136 LiptonReduction]: Total number of compositions: 77 [2023-11-19 07:41:09,229 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:41:09,239 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=LoopHeads, 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;@6ec1be54, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:41:09,240 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-19 07:41:09,251 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:41:09,251 INFO L124 PetriNetUnfolderBase]: 2/14 cut-off events. [2023-11-19 07:41:09,252 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 07:41:09,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:41:09,253 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:41:09,254 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:41:09,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:09,261 INFO L85 PathProgramCache]: Analyzing trace with hash -1955877256, now seen corresponding path program 1 times [2023-11-19 07:41:09,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:09,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486998066] [2023-11-19 07:41:09,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:09,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:09,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:09,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:41:09,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:41:09,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486998066] [2023-11-19 07:41:09,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486998066] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:41:09,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:41:09,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 07:41:09,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756197070] [2023-11-19 07:41:09,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:41:09,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 07:41:09,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:41:10,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 07:41:10,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-19 07:41:10,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 168 [2023-11-19 07:41:10,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 42 flow. Second operand has 7 states, 7 states have (on average 68.85714285714286) internal successors, (482), 7 states have internal predecessors, (482), 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) [2023-11-19 07:41:10,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:41:10,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 168 [2023-11-19 07:41:10,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:41:10,336 INFO L124 PetriNetUnfolderBase]: 98/184 cut-off events. [2023-11-19 07:41:10,336 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-11-19 07:41:10,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 397 conditions, 184 events. 98/184 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 576 event pairs, 32 based on Foata normal form. 1/139 useless extension candidates. Maximal degree in co-relation 292. Up to 85 conditions per place. [2023-11-19 07:41:10,340 INFO L140 encePairwiseOnDemand]: 160/168 looper letters, 36 selfloop transitions, 10 changer transitions 5/51 dead transitions. [2023-11-19 07:41:10,340 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 51 transitions, 240 flow [2023-11-19 07:41:10,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 07:41:10,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-19 07:41:10,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 521 transitions. [2023-11-19 07:41:10,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44302721088435376 [2023-11-19 07:41:10,361 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 521 transitions. [2023-11-19 07:41:10,361 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 521 transitions. [2023-11-19 07:41:10,364 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:41:10,367 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 521 transitions. [2023-11-19 07:41:10,373 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 74.42857142857143) internal successors, (521), 7 states have internal predecessors, (521), 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) [2023-11-19 07:41:10,380 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 168.0) internal successors, (1344), 8 states have internal predecessors, (1344), 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) [2023-11-19 07:41:10,381 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 168.0) internal successors, (1344), 8 states have internal predecessors, (1344), 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) [2023-11-19 07:41:10,383 INFO L175 Difference]: Start difference. First operand has 20 places, 15 transitions, 42 flow. Second operand 7 states and 521 transitions. [2023-11-19 07:41:10,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 51 transitions, 240 flow [2023-11-19 07:41:10,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 51 transitions, 216 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-19 07:41:10,390 INFO L231 Difference]: Finished difference. Result has 27 places, 24 transitions, 100 flow [2023-11-19 07:41:10,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=100, PETRI_PLACES=27, PETRI_TRANSITIONS=24} [2023-11-19 07:41:10,396 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 7 predicate places. [2023-11-19 07:41:10,396 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 24 transitions, 100 flow [2023-11-19 07:41:10,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 68.85714285714286) internal successors, (482), 7 states have internal predecessors, (482), 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) [2023-11-19 07:41:10,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:41:10,397 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:41:10,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 07:41:10,398 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:41:10,399 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:10,399 INFO L85 PathProgramCache]: Analyzing trace with hash -1577096610, now seen corresponding path program 2 times [2023-11-19 07:41:10,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:10,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803668795] [2023-11-19 07:41:10,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:10,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:10,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:10,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:41:10,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:41:10,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803668795] [2023-11-19 07:41:10,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803668795] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:41:10,704 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:41:10,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 07:41:10,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618700872] [2023-11-19 07:41:10,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:41:10,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 07:41:10,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:41:10,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 07:41:10,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-19 07:41:10,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 168 [2023-11-19 07:41:10,807 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 24 transitions, 100 flow. Second operand has 7 states, 7 states have (on average 68.85714285714286) internal successors, (482), 7 states have internal predecessors, (482), 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) [2023-11-19 07:41:10,807 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:41:10,807 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 168 [2023-11-19 07:41:10,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:41:11,015 INFO L124 PetriNetUnfolderBase]: 109/209 cut-off events. [2023-11-19 07:41:11,016 INFO L125 PetriNetUnfolderBase]: For 102/102 co-relation queries the response was YES. [2023-11-19 07:41:11,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 633 conditions, 209 events. 109/209 cut-off events. For 102/102 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 713 event pairs, 12 based on Foata normal form. 1/210 useless extension candidates. Maximal degree in co-relation 613. Up to 125 conditions per place. [2023-11-19 07:41:11,020 INFO L140 encePairwiseOnDemand]: 160/168 looper letters, 42 selfloop transitions, 14 changer transitions 5/61 dead transitions. [2023-11-19 07:41:11,020 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 61 transitions, 354 flow [2023-11-19 07:41:11,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 07:41:11,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-19 07:41:11,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 523 transitions. [2023-11-19 07:41:11,025 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4447278911564626 [2023-11-19 07:41:11,025 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 523 transitions. [2023-11-19 07:41:11,026 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 523 transitions. [2023-11-19 07:41:11,026 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:41:11,027 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 523 transitions. [2023-11-19 07:41:11,029 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 74.71428571428571) internal successors, (523), 7 states have internal predecessors, (523), 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) [2023-11-19 07:41:11,033 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 168.0) internal successors, (1344), 8 states have internal predecessors, (1344), 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) [2023-11-19 07:41:11,035 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 168.0) internal successors, (1344), 8 states have internal predecessors, (1344), 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) [2023-11-19 07:41:11,035 INFO L175 Difference]: Start difference. First operand has 27 places, 24 transitions, 100 flow. Second operand 7 states and 523 transitions. [2023-11-19 07:41:11,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 61 transitions, 354 flow [2023-11-19 07:41:11,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 61 transitions, 338 flow, removed 8 selfloop flow, removed 1 redundant places. [2023-11-19 07:41:11,040 INFO L231 Difference]: Finished difference. Result has 36 places, 32 transitions, 191 flow [2023-11-19 07:41:11,040 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=191, PETRI_PLACES=36, PETRI_TRANSITIONS=32} [2023-11-19 07:41:11,041 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 16 predicate places. [2023-11-19 07:41:11,042 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 32 transitions, 191 flow [2023-11-19 07:41:11,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 68.85714285714286) internal successors, (482), 7 states have internal predecessors, (482), 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) [2023-11-19 07:41:11,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:41:11,043 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:41:11,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 07:41:11,043 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:41:11,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:11,044 INFO L85 PathProgramCache]: Analyzing trace with hash -1874789880, now seen corresponding path program 3 times [2023-11-19 07:41:11,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:11,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645084298] [2023-11-19 07:41:11,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:11,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:11,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:11,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:41:11,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:41:11,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645084298] [2023-11-19 07:41:11,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645084298] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:41:11,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:41:11,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 07:41:11,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298558924] [2023-11-19 07:41:11,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:41:11,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 07:41:11,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:41:11,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 07:41:11,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-11-19 07:41:11,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 168 [2023-11-19 07:41:11,421 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 32 transitions, 191 flow. Second operand has 7 states, 7 states have (on average 68.85714285714286) internal successors, (482), 7 states have internal predecessors, (482), 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) [2023-11-19 07:41:11,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:41:11,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 168 [2023-11-19 07:41:11,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:41:11,614 INFO L124 PetriNetUnfolderBase]: 115/219 cut-off events. [2023-11-19 07:41:11,615 INFO L125 PetriNetUnfolderBase]: For 312/312 co-relation queries the response was YES. [2023-11-19 07:41:11,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 813 conditions, 219 events. 115/219 cut-off events. For 312/312 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 743 event pairs, 32 based on Foata normal form. 1/220 useless extension candidates. Maximal degree in co-relation 788. Up to 95 conditions per place. [2023-11-19 07:41:11,622 INFO L140 encePairwiseOnDemand]: 160/168 looper letters, 33 selfloop transitions, 21 changer transitions 5/59 dead transitions. [2023-11-19 07:41:11,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 59 transitions, 428 flow [2023-11-19 07:41:11,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 07:41:11,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-19 07:41:11,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 518 transitions. [2023-11-19 07:41:11,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2023-11-19 07:41:11,626 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 518 transitions. [2023-11-19 07:41:11,626 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 518 transitions. [2023-11-19 07:41:11,626 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:41:11,627 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 518 transitions. [2023-11-19 07:41:11,629 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 74.0) internal successors, (518), 7 states have internal predecessors, (518), 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) [2023-11-19 07:41:11,633 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 168.0) internal successors, (1344), 8 states have internal predecessors, (1344), 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) [2023-11-19 07:41:11,635 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 168.0) internal successors, (1344), 8 states have internal predecessors, (1344), 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) [2023-11-19 07:41:11,635 INFO L175 Difference]: Start difference. First operand has 36 places, 32 transitions, 191 flow. Second operand 7 states and 518 transitions. [2023-11-19 07:41:11,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 59 transitions, 428 flow [2023-11-19 07:41:11,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 59 transitions, 398 flow, removed 9 selfloop flow, removed 2 redundant places. [2023-11-19 07:41:11,646 INFO L231 Difference]: Finished difference. Result has 43 places, 38 transitions, 279 flow [2023-11-19 07:41:11,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=279, PETRI_PLACES=43, PETRI_TRANSITIONS=38} [2023-11-19 07:41:11,648 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 23 predicate places. [2023-11-19 07:41:11,649 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 38 transitions, 279 flow [2023-11-19 07:41:11,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 68.85714285714286) internal successors, (482), 7 states have internal predecessors, (482), 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) [2023-11-19 07:41:11,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:41:11,650 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:41:11,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 07:41:11,650 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:41:11,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:11,651 INFO L85 PathProgramCache]: Analyzing trace with hash 750816584, now seen corresponding path program 4 times [2023-11-19 07:41:11,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:11,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989452808] [2023-11-19 07:41:11,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:11,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:11,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:11,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:41:11,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:41:11,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989452808] [2023-11-19 07:41:11,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989452808] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:41:11,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:41:11,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 07:41:11,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797157205] [2023-11-19 07:41:11,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:41:11,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 07:41:11,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:41:11,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 07:41:11,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-19 07:41:11,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 168 [2023-11-19 07:41:11,955 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 38 transitions, 279 flow. Second operand has 7 states, 7 states have (on average 68.85714285714286) internal successors, (482), 7 states have internal predecessors, (482), 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) [2023-11-19 07:41:11,955 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:41:11,955 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 168 [2023-11-19 07:41:11,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:41:12,114 INFO L124 PetriNetUnfolderBase]: 129/247 cut-off events. [2023-11-19 07:41:12,114 INFO L125 PetriNetUnfolderBase]: For 474/474 co-relation queries the response was YES. [2023-11-19 07:41:12,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 986 conditions, 247 events. 129/247 cut-off events. For 474/474 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 893 event pairs, 22 based on Foata normal form. 1/248 useless extension candidates. Maximal degree in co-relation 955. Up to 155 conditions per place. [2023-11-19 07:41:12,118 INFO L140 encePairwiseOnDemand]: 160/168 looper letters, 35 selfloop transitions, 24 changer transitions 5/64 dead transitions. [2023-11-19 07:41:12,118 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 64 transitions, 532 flow [2023-11-19 07:41:12,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 07:41:12,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-19 07:41:12,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 516 transitions. [2023-11-19 07:41:12,122 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4387755102040816 [2023-11-19 07:41:12,122 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 516 transitions. [2023-11-19 07:41:12,122 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 516 transitions. [2023-11-19 07:41:12,123 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:41:12,123 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 516 transitions. [2023-11-19 07:41:12,125 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 73.71428571428571) internal successors, (516), 7 states have internal predecessors, (516), 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) [2023-11-19 07:41:12,128 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 168.0) internal successors, (1344), 8 states have internal predecessors, (1344), 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) [2023-11-19 07:41:12,128 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 168.0) internal successors, (1344), 8 states have internal predecessors, (1344), 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) [2023-11-19 07:41:12,129 INFO L175 Difference]: Start difference. First operand has 43 places, 38 transitions, 279 flow. Second operand 7 states and 516 transitions. [2023-11-19 07:41:12,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 64 transitions, 532 flow [2023-11-19 07:41:12,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 64 transitions, 496 flow, removed 5 selfloop flow, removed 3 redundant places. [2023-11-19 07:41:12,137 INFO L231 Difference]: Finished difference. Result has 48 places, 45 transitions, 390 flow [2023-11-19 07:41:12,137 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=390, PETRI_PLACES=48, PETRI_TRANSITIONS=45} [2023-11-19 07:41:12,139 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 28 predicate places. [2023-11-19 07:41:12,139 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 45 transitions, 390 flow [2023-11-19 07:41:12,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 68.85714285714286) internal successors, (482), 7 states have internal predecessors, (482), 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) [2023-11-19 07:41:12,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:41:12,140 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:41:12,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 07:41:12,140 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:41:12,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:12,142 INFO L85 PathProgramCache]: Analyzing trace with hash -936886930, now seen corresponding path program 5 times [2023-11-19 07:41:12,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:12,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377137992] [2023-11-19 07:41:12,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:12,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:12,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:12,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:41:12,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:41:12,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377137992] [2023-11-19 07:41:12,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377137992] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:41:12,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:41:12,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 07:41:12,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352339910] [2023-11-19 07:41:12,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:41:12,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 07:41:12,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:41:12,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 07:41:12,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-11-19 07:41:12,567 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 168 [2023-11-19 07:41:12,568 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 45 transitions, 390 flow. Second operand has 7 states, 7 states have (on average 68.85714285714286) internal successors, (482), 7 states have internal predecessors, (482), 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) [2023-11-19 07:41:12,568 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:41:12,568 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 168 [2023-11-19 07:41:12,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:41:12,749 INFO L124 PetriNetUnfolderBase]: 140/272 cut-off events. [2023-11-19 07:41:12,750 INFO L125 PetriNetUnfolderBase]: For 696/696 co-relation queries the response was YES. [2023-11-19 07:41:12,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1172 conditions, 272 events. 140/272 cut-off events. For 696/696 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1031 event pairs, 30 based on Foata normal form. 1/273 useless extension candidates. Maximal degree in co-relation 1136. Up to 159 conditions per place. [2023-11-19 07:41:12,754 INFO L140 encePairwiseOnDemand]: 160/168 looper letters, 37 selfloop transitions, 26 changer transitions 5/68 dead transitions. [2023-11-19 07:41:12,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 68 transitions, 611 flow [2023-11-19 07:41:12,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 07:41:12,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-19 07:41:12,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 518 transitions. [2023-11-19 07:41:12,757 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2023-11-19 07:41:12,757 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 518 transitions. [2023-11-19 07:41:12,758 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 518 transitions. [2023-11-19 07:41:12,758 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:41:12,758 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 518 transitions. [2023-11-19 07:41:12,760 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 74.0) internal successors, (518), 7 states have internal predecessors, (518), 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) [2023-11-19 07:41:12,763 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 168.0) internal successors, (1344), 8 states have internal predecessors, (1344), 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) [2023-11-19 07:41:12,763 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 168.0) internal successors, (1344), 8 states have internal predecessors, (1344), 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) [2023-11-19 07:41:12,764 INFO L175 Difference]: Start difference. First operand has 48 places, 45 transitions, 390 flow. Second operand 7 states and 518 transitions. [2023-11-19 07:41:12,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 68 transitions, 611 flow [2023-11-19 07:41:12,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 68 transitions, 570 flow, removed 9 selfloop flow, removed 2 redundant places. [2023-11-19 07:41:12,772 INFO L231 Difference]: Finished difference. Result has 54 places, 47 transitions, 445 flow [2023-11-19 07:41:12,772 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=354, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=445, PETRI_PLACES=54, PETRI_TRANSITIONS=47} [2023-11-19 07:41:12,775 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 34 predicate places. [2023-11-19 07:41:12,775 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 47 transitions, 445 flow [2023-11-19 07:41:12,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 68.85714285714286) internal successors, (482), 7 states have internal predecessors, (482), 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) [2023-11-19 07:41:12,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:41:12,776 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:41:12,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 07:41:12,776 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:41:12,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:12,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1408396894, now seen corresponding path program 6 times [2023-11-19 07:41:12,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:12,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243674251] [2023-11-19 07:41:12,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:12,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:12,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:13,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:41:13,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:41:13,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243674251] [2023-11-19 07:41:13,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243674251] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:41:13,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:41:13,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 07:41:13,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182147835] [2023-11-19 07:41:13,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:41:13,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 07:41:13,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:41:13,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 07:41:13,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-19 07:41:13,110 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 168 [2023-11-19 07:41:13,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 47 transitions, 445 flow. Second operand has 7 states, 7 states have (on average 68.85714285714286) internal successors, (482), 7 states have internal predecessors, (482), 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) [2023-11-19 07:41:13,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:41:13,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 168 [2023-11-19 07:41:13,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:41:13,314 INFO L124 PetriNetUnfolderBase]: 137/263 cut-off events. [2023-11-19 07:41:13,314 INFO L125 PetriNetUnfolderBase]: For 841/841 co-relation queries the response was YES. [2023-11-19 07:41:13,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1204 conditions, 263 events. 137/263 cut-off events. For 841/841 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 966 event pairs, 46 based on Foata normal form. 1/264 useless extension candidates. Maximal degree in co-relation 1168. Up to 123 conditions per place. [2023-11-19 07:41:13,319 INFO L140 encePairwiseOnDemand]: 160/168 looper letters, 36 selfloop transitions, 28 changer transitions 5/69 dead transitions. [2023-11-19 07:41:13,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 69 transitions, 657 flow [2023-11-19 07:41:13,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 07:41:13,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-19 07:41:13,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 520 transitions. [2023-11-19 07:41:13,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4421768707482993 [2023-11-19 07:41:13,322 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 520 transitions. [2023-11-19 07:41:13,323 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 520 transitions. [2023-11-19 07:41:13,323 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:41:13,323 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 520 transitions. [2023-11-19 07:41:13,325 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 74.28571428571429) internal successors, (520), 7 states have internal predecessors, (520), 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) [2023-11-19 07:41:13,328 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 168.0) internal successors, (1344), 8 states have internal predecessors, (1344), 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) [2023-11-19 07:41:13,329 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 168.0) internal successors, (1344), 8 states have internal predecessors, (1344), 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) [2023-11-19 07:41:13,329 INFO L175 Difference]: Start difference. First operand has 54 places, 47 transitions, 445 flow. Second operand 7 states and 520 transitions. [2023-11-19 07:41:13,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 69 transitions, 657 flow [2023-11-19 07:41:13,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 69 transitions, 616 flow, removed 2 selfloop flow, removed 4 redundant places. [2023-11-19 07:41:13,338 INFO L231 Difference]: Finished difference. Result has 56 places, 47 transitions, 464 flow [2023-11-19 07:41:13,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=406, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=464, PETRI_PLACES=56, PETRI_TRANSITIONS=47} [2023-11-19 07:41:13,339 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 36 predicate places. [2023-11-19 07:41:13,339 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 47 transitions, 464 flow [2023-11-19 07:41:13,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 68.85714285714286) internal successors, (482), 7 states have internal predecessors, (482), 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) [2023-11-19 07:41:13,340 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:41:13,340 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:41:13,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 07:41:13,341 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:41:13,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:13,341 INFO L85 PathProgramCache]: Analyzing trace with hash 1336044782, now seen corresponding path program 1 times [2023-11-19 07:41:13,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:13,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432428718] [2023-11-19 07:41:13,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:13,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:13,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:13,394 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:41:13,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:41:13,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432428718] [2023-11-19 07:41:13,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432428718] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:41:13,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:41:13,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:41:13,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589397565] [2023-11-19 07:41:13,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:41:13,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:41:13,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:41:13,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:41:13,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:41:13,400 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 168 [2023-11-19 07:41:13,401 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 47 transitions, 464 flow. Second operand has 3 states, 3 states have (on average 83.66666666666667) internal successors, (251), 3 states have internal predecessors, (251), 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) [2023-11-19 07:41:13,401 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:41:13,401 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 168 [2023-11-19 07:41:13,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:41:13,451 INFO L124 PetriNetUnfolderBase]: 60/125 cut-off events. [2023-11-19 07:41:13,452 INFO L125 PetriNetUnfolderBase]: For 681/681 co-relation queries the response was YES. [2023-11-19 07:41:13,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 583 conditions, 125 events. 60/125 cut-off events. For 681/681 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 376 event pairs, 26 based on Foata normal form. 18/143 useless extension candidates. Maximal degree in co-relation 559. Up to 67 conditions per place. [2023-11-19 07:41:13,454 INFO L140 encePairwiseOnDemand]: 165/168 looper letters, 24 selfloop transitions, 7 changer transitions 6/37 dead transitions. [2023-11-19 07:41:13,454 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 37 transitions, 375 flow [2023-11-19 07:41:13,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:41:13,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:41:13,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 262 transitions. [2023-11-19 07:41:13,456 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5198412698412699 [2023-11-19 07:41:13,456 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 262 transitions. [2023-11-19 07:41:13,456 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 262 transitions. [2023-11-19 07:41:13,457 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:41:13,457 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 262 transitions. [2023-11-19 07:41:13,458 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 87.33333333333333) internal successors, (262), 3 states have internal predecessors, (262), 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) [2023-11-19 07:41:13,460 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 168.0) internal successors, (672), 4 states have internal predecessors, (672), 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) [2023-11-19 07:41:13,460 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 168.0) internal successors, (672), 4 states have internal predecessors, (672), 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) [2023-11-19 07:41:13,460 INFO L175 Difference]: Start difference. First operand has 56 places, 47 transitions, 464 flow. Second operand 3 states and 262 transitions. [2023-11-19 07:41:13,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 37 transitions, 375 flow [2023-11-19 07:41:13,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 37 transitions, 297 flow, removed 1 selfloop flow, removed 12 redundant places. [2023-11-19 07:41:13,466 INFO L231 Difference]: Finished difference. Result has 45 places, 28 transitions, 181 flow [2023-11-19 07:41:13,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=211, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=181, PETRI_PLACES=45, PETRI_TRANSITIONS=28} [2023-11-19 07:41:13,467 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 25 predicate places. [2023-11-19 07:41:13,467 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 28 transitions, 181 flow [2023-11-19 07:41:13,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 83.66666666666667) internal successors, (251), 3 states have internal predecessors, (251), 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) [2023-11-19 07:41:13,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:41:13,468 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:41:13,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-19 07:41:13,468 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:41:13,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:13,469 INFO L85 PathProgramCache]: Analyzing trace with hash 424857833, now seen corresponding path program 1 times [2023-11-19 07:41:13,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:13,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383443877] [2023-11-19 07:41:13,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:13,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:13,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:13,734 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:41:13,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:41:13,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383443877] [2023-11-19 07:41:13,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383443877] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:41:13,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176697441] [2023-11-19 07:41:13,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:13,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:41:13,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db4b714-22e4-4271-8255-bb4df4ae211f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:41:13,738 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db4b714-22e4-4271-8255-bb4df4ae211f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:41:13,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db4b714-22e4-4271-8255-bb4df4ae211f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:41:13,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:13,816 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-19 07:41:13,821 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:41:14,086 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:41:14,086 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:41:14,287 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:41:14,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176697441] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:41:14,288 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:41:14,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2023-11-19 07:41:14,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137849205] [2023-11-19 07:41:14,288 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:41:14,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-19 07:41:14,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:41:14,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-19 07:41:14,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2023-11-19 07:41:14,506 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 168 [2023-11-19 07:41:14,509 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 28 transitions, 181 flow. Second operand has 19 states, 19 states have (on average 67.0) internal successors, (1273), 19 states have internal predecessors, (1273), 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) [2023-11-19 07:41:14,509 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:41:14,509 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 168 [2023-11-19 07:41:14,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:41:15,106 INFO L124 PetriNetUnfolderBase]: 140/296 cut-off events. [2023-11-19 07:41:15,106 INFO L125 PetriNetUnfolderBase]: For 242/242 co-relation queries the response was YES. [2023-11-19 07:41:15,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 926 conditions, 296 events. 140/296 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1257 event pairs, 10 based on Foata normal form. 17/313 useless extension candidates. Maximal degree in co-relation 885. Up to 73 conditions per place. [2023-11-19 07:41:15,110 INFO L140 encePairwiseOnDemand]: 160/168 looper letters, 67 selfloop transitions, 24 changer transitions 25/116 dead transitions. [2023-11-19 07:41:15,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 116 transitions, 674 flow [2023-11-19 07:41:15,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-19 07:41:15,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-19 07:41:15,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1283 transitions. [2023-11-19 07:41:15,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42427248677248675 [2023-11-19 07:41:15,117 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1283 transitions. [2023-11-19 07:41:15,117 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1283 transitions. [2023-11-19 07:41:15,119 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:41:15,119 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1283 transitions. [2023-11-19 07:41:15,124 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 71.27777777777777) internal successors, (1283), 18 states have internal predecessors, (1283), 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) [2023-11-19 07:41:15,131 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 168.0) internal successors, (3192), 19 states have internal predecessors, (3192), 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) [2023-11-19 07:41:15,132 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 168.0) internal successors, (3192), 19 states have internal predecessors, (3192), 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) [2023-11-19 07:41:15,133 INFO L175 Difference]: Start difference. First operand has 45 places, 28 transitions, 181 flow. Second operand 18 states and 1283 transitions. [2023-11-19 07:41:15,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 116 transitions, 674 flow [2023-11-19 07:41:15,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 116 transitions, 647 flow, removed 3 selfloop flow, removed 8 redundant places. [2023-11-19 07:41:15,141 INFO L231 Difference]: Finished difference. Result has 60 places, 42 transitions, 308 flow [2023-11-19 07:41:15,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=308, PETRI_PLACES=60, PETRI_TRANSITIONS=42} [2023-11-19 07:41:15,144 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 40 predicate places. [2023-11-19 07:41:15,144 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 42 transitions, 308 flow [2023-11-19 07:41:15,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 67.0) internal successors, (1273), 19 states have internal predecessors, (1273), 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) [2023-11-19 07:41:15,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:41:15,145 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:41:15,168 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db4b714-22e4-4271-8255-bb4df4ae211f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 07:41:15,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db4b714-22e4-4271-8255-bb4df4ae211f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:41:15,366 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:41:15,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:15,366 INFO L85 PathProgramCache]: Analyzing trace with hash -261664481, now seen corresponding path program 2 times [2023-11-19 07:41:15,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:15,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984365161] [2023-11-19 07:41:15,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:15,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:15,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:15,599 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:41:15,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:41:15,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984365161] [2023-11-19 07:41:15,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984365161] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:41:15,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894812699] [2023-11-19 07:41:15,600 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:41:15,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:41:15,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db4b714-22e4-4271-8255-bb4df4ae211f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:41:15,602 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db4b714-22e4-4271-8255-bb4df4ae211f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:41:15,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db4b714-22e4-4271-8255-bb4df4ae211f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:41:15,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:41:15,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:41:15,684 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-19 07:41:15,686 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:41:15,870 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:41:15,871 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:41:16,032 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:41:16,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894812699] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:41:16,032 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:41:16,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2023-11-19 07:41:16,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805929031] [2023-11-19 07:41:16,033 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:41:16,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-19 07:41:16,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:41:16,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-19 07:41:16,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2023-11-19 07:41:16,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 168 [2023-11-19 07:41:16,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 42 transitions, 308 flow. Second operand has 19 states, 19 states have (on average 67.0) internal successors, (1273), 19 states have internal predecessors, (1273), 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) [2023-11-19 07:41:16,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:41:16,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 168 [2023-11-19 07:41:16,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:41:17,064 INFO L124 PetriNetUnfolderBase]: 182/396 cut-off events. [2023-11-19 07:41:17,065 INFO L125 PetriNetUnfolderBase]: For 1148/1148 co-relation queries the response was YES. [2023-11-19 07:41:17,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1677 conditions, 396 events. 182/396 cut-off events. For 1148/1148 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1860 event pairs, 22 based on Foata normal form. 3/399 useless extension candidates. Maximal degree in co-relation 1607. Up to 127 conditions per place. [2023-11-19 07:41:17,070 INFO L140 encePairwiseOnDemand]: 160/168 looper letters, 84 selfloop transitions, 46 changer transitions 17/147 dead transitions. [2023-11-19 07:41:17,071 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 147 transitions, 1100 flow [2023-11-19 07:41:17,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-19 07:41:17,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-11-19 07:41:17,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1760 transitions. [2023-11-19 07:41:17,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41904761904761906 [2023-11-19 07:41:17,079 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1760 transitions. [2023-11-19 07:41:17,079 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1760 transitions. [2023-11-19 07:41:17,081 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:41:17,081 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1760 transitions. [2023-11-19 07:41:17,087 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 70.4) internal successors, (1760), 25 states have internal predecessors, (1760), 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) [2023-11-19 07:41:17,096 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 168.0) internal successors, (4368), 26 states have internal predecessors, (4368), 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) [2023-11-19 07:41:17,098 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 168.0) internal successors, (4368), 26 states have internal predecessors, (4368), 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) [2023-11-19 07:41:17,099 INFO L175 Difference]: Start difference. First operand has 60 places, 42 transitions, 308 flow. Second operand 25 states and 1760 transitions. [2023-11-19 07:41:17,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 147 transitions, 1100 flow [2023-11-19 07:41:17,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 147 transitions, 937 flow, removed 77 selfloop flow, removed 6 redundant places. [2023-11-19 07:41:17,109 INFO L231 Difference]: Finished difference. Result has 84 places, 65 transitions, 541 flow [2023-11-19 07:41:17,110 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=253, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=541, PETRI_PLACES=84, PETRI_TRANSITIONS=65} [2023-11-19 07:41:17,111 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 64 predicate places. [2023-11-19 07:41:17,111 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 65 transitions, 541 flow [2023-11-19 07:41:17,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 67.0) internal successors, (1273), 19 states have internal predecessors, (1273), 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) [2023-11-19 07:41:17,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:41:17,112 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:41:17,134 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db4b714-22e4-4271-8255-bb4df4ae211f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-19 07:41:17,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db4b714-22e4-4271-8255-bb4df4ae211f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-19 07:41:17,329 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:41:17,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:17,329 INFO L85 PathProgramCache]: Analyzing trace with hash -284555501, now seen corresponding path program 3 times [2023-11-19 07:41:17,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:17,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513940853] [2023-11-19 07:41:17,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:17,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:17,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:17,532 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:41:17,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:41:17,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513940853] [2023-11-19 07:41:17,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513940853] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:41:17,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049325571] [2023-11-19 07:41:17,533 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 07:41:17,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:41:17,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db4b714-22e4-4271-8255-bb4df4ae211f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:41:17,534 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db4b714-22e4-4271-8255-bb4df4ae211f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:41:17,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db4b714-22e4-4271-8255-bb4df4ae211f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 07:41:17,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-19 07:41:17,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:41:17,628 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-19 07:41:17,630 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:41:17,841 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:41:17,841 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:41:18,021 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:41:18,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049325571] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:41:18,022 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:41:18,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2023-11-19 07:41:18,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218403171] [2023-11-19 07:41:18,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:41:18,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-19 07:41:18,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:41:18,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-19 07:41:18,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2023-11-19 07:41:18,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 168 [2023-11-19 07:41:18,269 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 65 transitions, 541 flow. Second operand has 19 states, 19 states have (on average 67.10526315789474) internal successors, (1275), 19 states have internal predecessors, (1275), 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) [2023-11-19 07:41:18,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:41:18,270 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 168 [2023-11-19 07:41:18,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:41:19,088 INFO L124 PetriNetUnfolderBase]: 180/377 cut-off events. [2023-11-19 07:41:19,088 INFO L125 PetriNetUnfolderBase]: For 1783/1783 co-relation queries the response was YES. [2023-11-19 07:41:19,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1816 conditions, 377 events. 180/377 cut-off events. For 1783/1783 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1688 event pairs, 18 based on Foata normal form. 4/381 useless extension candidates. Maximal degree in co-relation 1783. Up to 129 conditions per place. [2023-11-19 07:41:19,095 INFO L140 encePairwiseOnDemand]: 160/168 looper letters, 62 selfloop transitions, 39 changer transitions 34/135 dead transitions. [2023-11-19 07:41:19,095 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 135 transitions, 1090 flow [2023-11-19 07:41:19,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-19 07:41:19,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-19 07:41:19,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1552 transitions. [2023-11-19 07:41:19,103 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4199134199134199 [2023-11-19 07:41:19,103 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1552 transitions. [2023-11-19 07:41:19,104 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1552 transitions. [2023-11-19 07:41:19,105 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:41:19,106 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1552 transitions. [2023-11-19 07:41:19,112 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 70.54545454545455) internal successors, (1552), 22 states have internal predecessors, (1552), 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) [2023-11-19 07:41:19,120 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 168.0) internal successors, (3864), 23 states have internal predecessors, (3864), 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) [2023-11-19 07:41:19,121 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 168.0) internal successors, (3864), 23 states have internal predecessors, (3864), 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) [2023-11-19 07:41:19,121 INFO L175 Difference]: Start difference. First operand has 84 places, 65 transitions, 541 flow. Second operand 22 states and 1552 transitions. [2023-11-19 07:41:19,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 135 transitions, 1090 flow [2023-11-19 07:41:19,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 135 transitions, 984 flow, removed 31 selfloop flow, removed 9 redundant places. [2023-11-19 07:41:19,135 INFO L231 Difference]: Finished difference. Result has 97 places, 60 transitions, 506 flow [2023-11-19 07:41:19,136 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=424, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=506, PETRI_PLACES=97, PETRI_TRANSITIONS=60} [2023-11-19 07:41:19,136 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 77 predicate places. [2023-11-19 07:41:19,137 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 60 transitions, 506 flow [2023-11-19 07:41:19,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 67.10526315789474) internal successors, (1275), 19 states have internal predecessors, (1275), 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) [2023-11-19 07:41:19,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:41:19,138 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:41:19,163 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db4b714-22e4-4271-8255-bb4df4ae211f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 07:41:19,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db4b714-22e4-4271-8255-bb4df4ae211f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:41:19,357 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:41:19,357 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:19,357 INFO L85 PathProgramCache]: Analyzing trace with hash 779171725, now seen corresponding path program 4 times [2023-11-19 07:41:19,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:19,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578760071] [2023-11-19 07:41:19,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:19,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:19,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:19,543 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:41:19,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:41:19,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578760071] [2023-11-19 07:41:19,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578760071] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:41:19,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536226473] [2023-11-19 07:41:19,544 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-19 07:41:19,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:41:19,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db4b714-22e4-4271-8255-bb4df4ae211f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:41:19,545 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db4b714-22e4-4271-8255-bb4df4ae211f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:41:19,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db4b714-22e4-4271-8255-bb4df4ae211f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 07:41:19,622 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-19 07:41:19,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:41:19,624 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-19 07:41:19,625 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:41:19,817 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:41:19,817 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:41:19,978 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:41:19,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536226473] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:41:19,978 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:41:19,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2023-11-19 07:41:19,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727943792] [2023-11-19 07:41:19,979 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:41:19,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-19 07:41:19,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:41:19,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-19 07:41:19,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2023-11-19 07:41:20,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 168 [2023-11-19 07:41:20,188 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 60 transitions, 506 flow. Second operand has 19 states, 19 states have (on average 67.0) internal successors, (1273), 19 states have internal predecessors, (1273), 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) [2023-11-19 07:41:20,188 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:41:20,188 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 168 [2023-11-19 07:41:20,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:41:20,546 INFO L124 PetriNetUnfolderBase]: 167/346 cut-off events. [2023-11-19 07:41:20,546 INFO L125 PetriNetUnfolderBase]: For 1929/1929 co-relation queries the response was YES. [2023-11-19 07:41:20,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1766 conditions, 346 events. 167/346 cut-off events. For 1929/1929 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1457 event pairs, 24 based on Foata normal form. 2/346 useless extension candidates. Maximal degree in co-relation 1730. Up to 268 conditions per place. [2023-11-19 07:41:20,552 INFO L140 encePairwiseOnDemand]: 160/168 looper letters, 55 selfloop transitions, 23 changer transitions 10/88 dead transitions. [2023-11-19 07:41:20,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 88 transitions, 787 flow [2023-11-19 07:41:20,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-19 07:41:20,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-19 07:41:20,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 906 transitions. [2023-11-19 07:41:20,558 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41483516483516486 [2023-11-19 07:41:20,558 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 906 transitions. [2023-11-19 07:41:20,559 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 906 transitions. [2023-11-19 07:41:20,561 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:41:20,561 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 906 transitions. [2023-11-19 07:41:20,567 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 69.6923076923077) internal successors, (906), 13 states have internal predecessors, (906), 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) [2023-11-19 07:41:20,574 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 168.0) internal successors, (2352), 14 states have internal predecessors, (2352), 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) [2023-11-19 07:41:20,580 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 168.0) internal successors, (2352), 14 states have internal predecessors, (2352), 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) [2023-11-19 07:41:20,581 INFO L175 Difference]: Start difference. First operand has 97 places, 60 transitions, 506 flow. Second operand 13 states and 906 transitions. [2023-11-19 07:41:20,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 88 transitions, 787 flow [2023-11-19 07:41:20,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 88 transitions, 706 flow, removed 11 selfloop flow, removed 16 redundant places. [2023-11-19 07:41:20,594 INFO L231 Difference]: Finished difference. Result has 84 places, 62 transitions, 509 flow [2023-11-19 07:41:20,594 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=437, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=509, PETRI_PLACES=84, PETRI_TRANSITIONS=62} [2023-11-19 07:41:20,595 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 64 predicate places. [2023-11-19 07:41:20,595 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 62 transitions, 509 flow [2023-11-19 07:41:20,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 67.0) internal successors, (1273), 19 states have internal predecessors, (1273), 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) [2023-11-19 07:41:20,596 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:41:20,597 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:41:20,620 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db4b714-22e4-4271-8255-bb4df4ae211f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 07:41:20,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db4b714-22e4-4271-8255-bb4df4ae211f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:41:20,820 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:41:20,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:20,821 INFO L85 PathProgramCache]: Analyzing trace with hash 535939039, now seen corresponding path program 5 times [2023-11-19 07:41:20,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:20,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903037269] [2023-11-19 07:41:20,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:20,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:20,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:21,060 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:41:21,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:41:21,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903037269] [2023-11-19 07:41:21,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903037269] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:41:21,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603077074] [2023-11-19 07:41:21,061 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-19 07:41:21,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:41:21,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db4b714-22e4-4271-8255-bb4df4ae211f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:41:21,063 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db4b714-22e4-4271-8255-bb4df4ae211f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:41:21,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db4b714-22e4-4271-8255-bb4df4ae211f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 07:41:21,159 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:41:21,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:41:21,161 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-19 07:41:21,164 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:41:21,349 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:41:21,350 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:41:21,502 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:41:21,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603077074] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:41:21,503 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:41:21,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2023-11-19 07:41:21,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58656864] [2023-11-19 07:41:21,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:41:21,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-19 07:41:21,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:41:21,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-19 07:41:21,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2023-11-19 07:41:21,740 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 168 [2023-11-19 07:41:21,741 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 62 transitions, 509 flow. Second operand has 19 states, 19 states have (on average 67.0) internal successors, (1273), 19 states have internal predecessors, (1273), 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) [2023-11-19 07:41:21,741 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:41:21,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 168 [2023-11-19 07:41:21,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:41:22,069 INFO L124 PetriNetUnfolderBase]: 169/352 cut-off events. [2023-11-19 07:41:22,069 INFO L125 PetriNetUnfolderBase]: For 1166/1166 co-relation queries the response was YES. [2023-11-19 07:41:22,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1620 conditions, 352 events. 169/352 cut-off events. For 1166/1166 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1487 event pairs, 39 based on Foata normal form. 2/352 useless extension candidates. Maximal degree in co-relation 1587. Up to 302 conditions per place. [2023-11-19 07:41:22,074 INFO L140 encePairwiseOnDemand]: 161/168 looper letters, 57 selfloop transitions, 15 changer transitions 10/82 dead transitions. [2023-11-19 07:41:22,075 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 82 transitions, 748 flow [2023-11-19 07:41:22,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-19 07:41:22,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-19 07:41:22,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 695 transitions. [2023-11-19 07:41:22,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2023-11-19 07:41:22,079 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 695 transitions. [2023-11-19 07:41:22,079 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 695 transitions. [2023-11-19 07:41:22,083 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:41:22,083 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 695 transitions. [2023-11-19 07:41:22,086 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 69.5) internal successors, (695), 10 states have internal predecessors, (695), 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) [2023-11-19 07:41:22,092 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 168.0) internal successors, (1848), 11 states have internal predecessors, (1848), 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) [2023-11-19 07:41:22,093 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 168.0) internal successors, (1848), 11 states have internal predecessors, (1848), 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) [2023-11-19 07:41:22,093 INFO L175 Difference]: Start difference. First operand has 84 places, 62 transitions, 509 flow. Second operand 10 states and 695 transitions. [2023-11-19 07:41:22,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 82 transitions, 748 flow [2023-11-19 07:41:22,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 82 transitions, 682 flow, removed 2 selfloop flow, removed 11 redundant places. [2023-11-19 07:41:22,107 INFO L231 Difference]: Finished difference. Result has 84 places, 64 transitions, 509 flow [2023-11-19 07:41:22,108 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=449, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=509, PETRI_PLACES=84, PETRI_TRANSITIONS=64} [2023-11-19 07:41:22,109 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 64 predicate places. [2023-11-19 07:41:22,110 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 64 transitions, 509 flow [2023-11-19 07:41:22,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 67.0) internal successors, (1273), 19 states have internal predecessors, (1273), 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) [2023-11-19 07:41:22,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:41:22,111 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:41:22,142 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db4b714-22e4-4271-8255-bb4df4ae211f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 07:41:22,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db4b714-22e4-4271-8255-bb4df4ae211f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:41:22,326 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:41:22,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:22,327 INFO L85 PathProgramCache]: Analyzing trace with hash -1948162507, now seen corresponding path program 6 times [2023-11-19 07:41:22,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:22,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508416973] [2023-11-19 07:41:22,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:22,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:22,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:22,571 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:41:22,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:41:22,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508416973] [2023-11-19 07:41:22,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508416973] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:41:22,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083256087] [2023-11-19 07:41:22,573 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-19 07:41:22,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:41:22,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db4b714-22e4-4271-8255-bb4df4ae211f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:41:22,574 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db4b714-22e4-4271-8255-bb4df4ae211f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:41:22,596 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db4b714-22e4-4271-8255-bb4df4ae211f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 07:41:22,664 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-19 07:41:22,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:41:22,665 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-19 07:41:22,667 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:41:22,874 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:41:22,874 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:41:23,071 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:41:23,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083256087] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:41:23,074 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:41:23,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2023-11-19 07:41:23,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336588831] [2023-11-19 07:41:23,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:41:23,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-19 07:41:23,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:41:23,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-19 07:41:23,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2023-11-19 07:41:23,358 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 168 [2023-11-19 07:41:23,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 64 transitions, 509 flow. Second operand has 19 states, 19 states have (on average 67.0) internal successors, (1273), 19 states have internal predecessors, (1273), 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) [2023-11-19 07:41:23,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:41:23,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 168 [2023-11-19 07:41:23,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:41:24,154 INFO L124 PetriNetUnfolderBase]: 169/366 cut-off events. [2023-11-19 07:41:24,154 INFO L125 PetriNetUnfolderBase]: For 1163/1163 co-relation queries the response was YES. [2023-11-19 07:41:24,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1659 conditions, 366 events. 169/366 cut-off events. For 1163/1163 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1643 event pairs, 17 based on Foata normal form. 4/368 useless extension candidates. Maximal degree in co-relation 1622. Up to 231 conditions per place. [2023-11-19 07:41:24,159 INFO L140 encePairwiseOnDemand]: 160/168 looper letters, 64 selfloop transitions, 31 changer transitions 21/116 dead transitions. [2023-11-19 07:41:24,160 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 116 transitions, 982 flow [2023-11-19 07:41:24,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-19 07:41:24,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-19 07:41:24,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1384 transitions. [2023-11-19 07:41:24,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4119047619047619 [2023-11-19 07:41:24,165 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1384 transitions. [2023-11-19 07:41:24,165 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1384 transitions. [2023-11-19 07:41:24,166 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:41:24,166 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1384 transitions. [2023-11-19 07:41:24,170 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 69.2) internal successors, (1384), 20 states have internal predecessors, (1384), 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) [2023-11-19 07:41:24,177 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 168.0) internal successors, (3528), 21 states have internal predecessors, (3528), 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) [2023-11-19 07:41:24,179 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 168.0) internal successors, (3528), 21 states have internal predecessors, (3528), 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) [2023-11-19 07:41:24,179 INFO L175 Difference]: Start difference. First operand has 84 places, 64 transitions, 509 flow. Second operand 20 states and 1384 transitions. [2023-11-19 07:41:24,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 116 transitions, 982 flow [2023-11-19 07:41:24,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 116 transitions, 948 flow, removed 4 selfloop flow, removed 7 redundant places. [2023-11-19 07:41:24,192 INFO L231 Difference]: Finished difference. Result has 102 places, 73 transitions, 673 flow [2023-11-19 07:41:24,192 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=477, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=673, PETRI_PLACES=102, PETRI_TRANSITIONS=73} [2023-11-19 07:41:24,193 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 82 predicate places. [2023-11-19 07:41:24,193 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 73 transitions, 673 flow [2023-11-19 07:41:24,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 67.0) internal successors, (1273), 19 states have internal predecessors, (1273), 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) [2023-11-19 07:41:24,194 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:41:24,195 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:41:24,224 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db4b714-22e4-4271-8255-bb4df4ae211f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 07:41:24,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db4b714-22e4-4271-8255-bb4df4ae211f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-19 07:41:24,419 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:41:24,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:24,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1974678845, now seen corresponding path program 7 times [2023-11-19 07:41:24,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:24,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622672960] [2023-11-19 07:41:24,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:24,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:24,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:24,591 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:41:24,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:41:24,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622672960] [2023-11-19 07:41:24,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622672960] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:41:24,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261240577] [2023-11-19 07:41:24,592 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-19 07:41:24,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:41:24,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db4b714-22e4-4271-8255-bb4df4ae211f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:41:24,594 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db4b714-22e4-4271-8255-bb4df4ae211f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:41:24,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db4b714-22e4-4271-8255-bb4df4ae211f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 07:41:24,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:24,682 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-19 07:41:24,683 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:41:24,910 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:41:24,910 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:41:25,096 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:41:25,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261240577] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:41:25,097 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:41:25,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2023-11-19 07:41:25,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110594474] [2023-11-19 07:41:25,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:41:25,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-19 07:41:25,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:41:25,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-19 07:41:25,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2023-11-19 07:41:25,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 168 [2023-11-19 07:41:25,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 73 transitions, 673 flow. Second operand has 19 states, 19 states have (on average 67.0) internal successors, (1273), 19 states have internal predecessors, (1273), 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) [2023-11-19 07:41:25,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:41:25,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 168 [2023-11-19 07:41:25,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:41:25,782 INFO L124 PetriNetUnfolderBase]: 151/325 cut-off events. [2023-11-19 07:41:25,783 INFO L125 PetriNetUnfolderBase]: For 1747/1747 co-relation queries the response was YES. [2023-11-19 07:41:25,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1705 conditions, 325 events. 151/325 cut-off events. For 1747/1747 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1375 event pairs, 17 based on Foata normal form. 3/326 useless extension candidates. Maximal degree in co-relation 1669. Up to 260 conditions per place. [2023-11-19 07:41:25,788 INFO L140 encePairwiseOnDemand]: 160/168 looper letters, 63 selfloop transitions, 22 changer transitions 11/96 dead transitions. [2023-11-19 07:41:25,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 96 transitions, 960 flow [2023-11-19 07:41:25,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-19 07:41:25,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-19 07:41:25,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 967 transitions. [2023-11-19 07:41:25,792 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4111394557823129 [2023-11-19 07:41:25,792 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 967 transitions. [2023-11-19 07:41:25,792 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 967 transitions. [2023-11-19 07:41:25,793 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:41:25,793 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 967 transitions. [2023-11-19 07:41:25,796 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 69.07142857142857) internal successors, (967), 14 states have internal predecessors, (967), 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) [2023-11-19 07:41:25,809 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 168.0) internal successors, (2520), 15 states have internal predecessors, (2520), 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) [2023-11-19 07:41:25,811 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 168.0) internal successors, (2520), 15 states have internal predecessors, (2520), 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) [2023-11-19 07:41:25,811 INFO L175 Difference]: Start difference. First operand has 102 places, 73 transitions, 673 flow. Second operand 14 states and 967 transitions. [2023-11-19 07:41:25,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 96 transitions, 960 flow [2023-11-19 07:41:25,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 96 transitions, 856 flow, removed 34 selfloop flow, removed 10 redundant places. [2023-11-19 07:41:25,828 INFO L231 Difference]: Finished difference. Result has 103 places, 73 transitions, 641 flow [2023-11-19 07:41:25,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=572, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=641, PETRI_PLACES=103, PETRI_TRANSITIONS=73} [2023-11-19 07:41:25,829 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 83 predicate places. [2023-11-19 07:41:25,829 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 73 transitions, 641 flow [2023-11-19 07:41:25,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 67.0) internal successors, (1273), 19 states have internal predecessors, (1273), 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) [2023-11-19 07:41:25,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:41:25,831 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:41:25,859 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db4b714-22e4-4271-8255-bb4df4ae211f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-19 07:41:26,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db4b714-22e4-4271-8255-bb4df4ae211f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:41:26,045 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:41:26,045 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:26,045 INFO L85 PathProgramCache]: Analyzing trace with hash -1975868137, now seen corresponding path program 8 times [2023-11-19 07:41:26,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:26,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093809084] [2023-11-19 07:41:26,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:26,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:26,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:26,216 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:41:26,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:41:26,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093809084] [2023-11-19 07:41:26,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093809084] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:41:26,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868710445] [2023-11-19 07:41:26,217 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:41:26,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:41:26,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db4b714-22e4-4271-8255-bb4df4ae211f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:41:26,218 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db4b714-22e4-4271-8255-bb4df4ae211f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:41:26,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db4b714-22e4-4271-8255-bb4df4ae211f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-19 07:41:26,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:41:26,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:41:26,300 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-19 07:41:26,301 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:41:26,501 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:41:26,501 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:41:26,675 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:41:26,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868710445] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:41:26,677 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:41:26,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2023-11-19 07:41:26,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460151642] [2023-11-19 07:41:26,677 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:41:26,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-19 07:41:26,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:41:26,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-19 07:41:26,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2023-11-19 07:41:26,987 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 168 [2023-11-19 07:41:26,988 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 73 transitions, 641 flow. Second operand has 19 states, 19 states have (on average 67.0) internal successors, (1273), 19 states have internal predecessors, (1273), 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) [2023-11-19 07:41:26,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:41:26,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 168 [2023-11-19 07:41:26,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:41:27,621 INFO L124 PetriNetUnfolderBase]: 148/304 cut-off events. [2023-11-19 07:41:27,621 INFO L125 PetriNetUnfolderBase]: For 1308/1308 co-relation queries the response was YES. [2023-11-19 07:41:27,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1534 conditions, 304 events. 148/304 cut-off events. For 1308/1308 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1211 event pairs, 17 based on Foata normal form. 3/305 useless extension candidates. Maximal degree in co-relation 1497. Up to 217 conditions per place. [2023-11-19 07:41:27,626 INFO L140 encePairwiseOnDemand]: 160/168 looper letters, 59 selfloop transitions, 29 changer transitions 18/106 dead transitions. [2023-11-19 07:41:27,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 106 transitions, 963 flow [2023-11-19 07:41:27,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-19 07:41:27,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-19 07:41:27,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1180 transitions. [2023-11-19 07:41:27,630 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41316526610644255 [2023-11-19 07:41:27,630 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1180 transitions. [2023-11-19 07:41:27,630 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1180 transitions. [2023-11-19 07:41:27,631 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:41:27,631 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1180 transitions. [2023-11-19 07:41:27,634 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 69.41176470588235) internal successors, (1180), 17 states have internal predecessors, (1180), 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) [2023-11-19 07:41:27,638 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 168.0) internal successors, (3024), 18 states have internal predecessors, (3024), 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) [2023-11-19 07:41:27,639 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 168.0) internal successors, (3024), 18 states have internal predecessors, (3024), 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) [2023-11-19 07:41:27,640 INFO L175 Difference]: Start difference. First operand has 103 places, 73 transitions, 641 flow. Second operand 17 states and 1180 transitions. [2023-11-19 07:41:27,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 106 transitions, 963 flow [2023-11-19 07:41:27,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 106 transitions, 917 flow, removed 3 selfloop flow, removed 10 redundant places. [2023-11-19 07:41:27,652 INFO L231 Difference]: Finished difference. Result has 102 places, 72 transitions, 663 flow [2023-11-19 07:41:27,652 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=568, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=663, PETRI_PLACES=102, PETRI_TRANSITIONS=72} [2023-11-19 07:41:27,653 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 82 predicate places. [2023-11-19 07:41:27,653 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 72 transitions, 663 flow [2023-11-19 07:41:27,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 67.0) internal successors, (1273), 19 states have internal predecessors, (1273), 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) [2023-11-19 07:41:27,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:41:27,654 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:41:27,680 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db4b714-22e4-4271-8255-bb4df4ae211f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-19 07:41:27,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db4b714-22e4-4271-8255-bb4df4ae211f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:41:27,869 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:41:27,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:27,869 INFO L85 PathProgramCache]: Analyzing trace with hash 1973489354, now seen corresponding path program 1 times [2023-11-19 07:41:27,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:27,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838157751] [2023-11-19 07:41:27,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:27,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:27,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:28,066 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:41:28,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:41:28,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838157751] [2023-11-19 07:41:28,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838157751] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:41:28,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309734614] [2023-11-19 07:41:28,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:28,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:41:28,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db4b714-22e4-4271-8255-bb4df4ae211f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:41:28,069 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db4b714-22e4-4271-8255-bb4df4ae211f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:41:28,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db4b714-22e4-4271-8255-bb4df4ae211f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-19 07:41:28,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:28,145 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-19 07:41:28,147 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:41:28,309 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:41:28,310 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:41:28,388 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:41:28,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309734614] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:41:28,388 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:41:28,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2023-11-19 07:41:28,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739777421] [2023-11-19 07:41:28,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:41:28,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-19 07:41:28,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:41:28,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-19 07:41:28,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2023-11-19 07:41:28,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 168 [2023-11-19 07:41:28,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 72 transitions, 663 flow. Second operand has 19 states, 19 states have (on average 66.94736842105263) internal successors, (1272), 19 states have internal predecessors, (1272), 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) [2023-11-19 07:41:28,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:41:28,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 168 [2023-11-19 07:41:28,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:41:29,155 INFO L124 PetriNetUnfolderBase]: 181/363 cut-off events. [2023-11-19 07:41:29,156 INFO L125 PetriNetUnfolderBase]: For 2145/2145 co-relation queries the response was YES. [2023-11-19 07:41:29,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1905 conditions, 363 events. 181/363 cut-off events. For 2145/2145 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1503 event pairs, 10 based on Foata normal form. 7/368 useless extension candidates. Maximal degree in co-relation 1868. Up to 103 conditions per place. [2023-11-19 07:41:29,161 INFO L140 encePairwiseOnDemand]: 160/168 looper letters, 58 selfloop transitions, 45 changer transitions 35/138 dead transitions. [2023-11-19 07:41:29,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 138 transitions, 1233 flow [2023-11-19 07:41:29,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-19 07:41:29,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-19 07:41:29,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1208 transitions. [2023-11-19 07:41:29,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42296918767507 [2023-11-19 07:41:29,164 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1208 transitions. [2023-11-19 07:41:29,165 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1208 transitions. [2023-11-19 07:41:29,165 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:41:29,166 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1208 transitions. [2023-11-19 07:41:29,168 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 71.05882352941177) internal successors, (1208), 17 states have internal predecessors, (1208), 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) [2023-11-19 07:41:29,172 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 168.0) internal successors, (3024), 18 states have internal predecessors, (3024), 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) [2023-11-19 07:41:29,173 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 168.0) internal successors, (3024), 18 states have internal predecessors, (3024), 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) [2023-11-19 07:41:29,174 INFO L175 Difference]: Start difference. First operand has 102 places, 72 transitions, 663 flow. Second operand 17 states and 1208 transitions. [2023-11-19 07:41:29,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 138 transitions, 1233 flow [2023-11-19 07:41:29,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 138 transitions, 1094 flow, removed 49 selfloop flow, removed 13 redundant places. [2023-11-19 07:41:29,188 INFO L231 Difference]: Finished difference. Result has 109 places, 74 transitions, 714 flow [2023-11-19 07:41:29,189 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=578, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=714, PETRI_PLACES=109, PETRI_TRANSITIONS=74} [2023-11-19 07:41:29,189 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 89 predicate places. [2023-11-19 07:41:29,190 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 74 transitions, 714 flow [2023-11-19 07:41:29,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 66.94736842105263) internal successors, (1272), 19 states have internal predecessors, (1272), 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) [2023-11-19 07:41:29,190 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:41:29,191 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:41:29,217 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db4b714-22e4-4271-8255-bb4df4ae211f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-19 07:41:29,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db4b714-22e4-4271-8255-bb4df4ae211f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-19 07:41:29,413 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:41:29,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:29,413 INFO L85 PathProgramCache]: Analyzing trace with hash 7024895, now seen corresponding path program 9 times [2023-11-19 07:41:29,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:29,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467670193] [2023-11-19 07:41:29,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:29,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:29,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:29,631 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:41:29,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:41:29,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467670193] [2023-11-19 07:41:29,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467670193] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:41:29,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629049909] [2023-11-19 07:41:29,632 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 07:41:29,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:41:29,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db4b714-22e4-4271-8255-bb4df4ae211f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:41:29,637 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db4b714-22e4-4271-8255-bb4df4ae211f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:41:29,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db4b714-22e4-4271-8255-bb4df4ae211f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-19 07:41:29,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-19 07:41:29,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:41:29,724 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-19 07:41:29,725 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:41:30,017 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:41:30,018 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:41:30,266 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:41:30,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629049909] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:41:30,267 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:41:30,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 22 [2023-11-19 07:41:30,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441887321] [2023-11-19 07:41:30,267 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:41:30,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-19 07:41:30,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:41:30,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-19 07:41:30,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2023-11-19 07:41:30,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 168 [2023-11-19 07:41:30,588 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 74 transitions, 714 flow. Second operand has 24 states, 24 states have (on average 66.83333333333333) internal successors, (1604), 24 states have internal predecessors, (1604), 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) [2023-11-19 07:41:30,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:41:30,588 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 168 [2023-11-19 07:41:30,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:41:32,612 INFO L124 PetriNetUnfolderBase]: 353/684 cut-off events. [2023-11-19 07:41:32,613 INFO L125 PetriNetUnfolderBase]: For 5915/5915 co-relation queries the response was YES. [2023-11-19 07:41:32,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3833 conditions, 684 events. 353/684 cut-off events. For 5915/5915 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 3290 event pairs, 12 based on Foata normal form. 4/688 useless extension candidates. Maximal degree in co-relation 3790. Up to 193 conditions per place. [2023-11-19 07:41:32,623 INFO L140 encePairwiseOnDemand]: 160/168 looper letters, 125 selfloop transitions, 114 changer transitions 16/255 dead transitions. [2023-11-19 07:41:32,623 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 255 transitions, 2456 flow [2023-11-19 07:41:32,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-11-19 07:41:32,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2023-11-19 07:41:32,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 3282 transitions. [2023-11-19 07:41:32,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4156534954407295 [2023-11-19 07:41:32,636 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 3282 transitions. [2023-11-19 07:41:32,636 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 3282 transitions. [2023-11-19 07:41:32,638 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:41:32,639 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 3282 transitions. [2023-11-19 07:41:32,646 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 69.82978723404256) internal successors, (3282), 47 states have internal predecessors, (3282), 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) [2023-11-19 07:41:32,659 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 168.0) internal successors, (8064), 48 states have internal predecessors, (8064), 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) [2023-11-19 07:41:32,662 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 168.0) internal successors, (8064), 48 states have internal predecessors, (8064), 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) [2023-11-19 07:41:32,662 INFO L175 Difference]: Start difference. First operand has 109 places, 74 transitions, 714 flow. Second operand 47 states and 3282 transitions. [2023-11-19 07:41:32,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 255 transitions, 2456 flow [2023-11-19 07:41:32,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 255 transitions, 2045 flow, removed 168 selfloop flow, removed 15 redundant places. [2023-11-19 07:41:32,691 INFO L231 Difference]: Finished difference. Result has 148 places, 138 transitions, 1466 flow [2023-11-19 07:41:32,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=591, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=1466, PETRI_PLACES=148, PETRI_TRANSITIONS=138} [2023-11-19 07:41:32,692 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 128 predicate places. [2023-11-19 07:41:32,692 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 138 transitions, 1466 flow [2023-11-19 07:41:32,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 66.83333333333333) internal successors, (1604), 24 states have internal predecessors, (1604), 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) [2023-11-19 07:41:32,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:41:32,693 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:41:32,721 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db4b714-22e4-4271-8255-bb4df4ae211f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-19 07:41:32,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db4b714-22e4-4271-8255-bb4df4ae211f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-19 07:41:32,916 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:41:32,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:32,917 INFO L85 PathProgramCache]: Analyzing trace with hash -473744403, now seen corresponding path program 10 times [2023-11-19 07:41:32,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:32,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132232645] [2023-11-19 07:41:32,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:32,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:32,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:33,169 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:41:33,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:41:33,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132232645] [2023-11-19 07:41:33,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132232645] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:41:33,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906570756] [2023-11-19 07:41:33,170 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-19 07:41:33,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:41:33,170 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db4b714-22e4-4271-8255-bb4df4ae211f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:41:33,173 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db4b714-22e4-4271-8255-bb4df4ae211f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:41:33,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db4b714-22e4-4271-8255-bb4df4ae211f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-19 07:41:33,253 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-19 07:41:33,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:41:33,254 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-19 07:41:33,257 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:41:33,486 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:41:33,487 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:41:33,702 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:41:33,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906570756] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:41:33,702 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:41:33,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 22 [2023-11-19 07:41:33,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739074622] [2023-11-19 07:41:33,703 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:41:33,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-19 07:41:33,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:41:33,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-19 07:41:33,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2023-11-19 07:41:33,971 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 168 [2023-11-19 07:41:33,973 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 138 transitions, 1466 flow. Second operand has 24 states, 24 states have (on average 66.91666666666667) internal successors, (1606), 24 states have internal predecessors, (1606), 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) [2023-11-19 07:41:33,973 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:41:33,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 168 [2023-11-19 07:41:33,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:41:35,025 INFO L124 PetriNetUnfolderBase]: 414/828 cut-off events. [2023-11-19 07:41:35,026 INFO L125 PetriNetUnfolderBase]: For 9752/9752 co-relation queries the response was YES. [2023-11-19 07:41:35,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5100 conditions, 828 events. 414/828 cut-off events. For 9752/9752 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 4288 event pairs, 50 based on Foata normal form. 3/831 useless extension candidates. Maximal degree in co-relation 5049. Up to 301 conditions per place. [2023-11-19 07:41:35,038 INFO L140 encePairwiseOnDemand]: 160/168 looper letters, 126 selfloop transitions, 81 changer transitions 33/240 dead transitions. [2023-11-19 07:41:35,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 240 transitions, 2611 flow [2023-11-19 07:41:35,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-19 07:41:35,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-11-19 07:41:35,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1638 transitions. [2023-11-19 07:41:35,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42391304347826086 [2023-11-19 07:41:35,042 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1638 transitions. [2023-11-19 07:41:35,042 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1638 transitions. [2023-11-19 07:41:35,043 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:41:35,043 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1638 transitions. [2023-11-19 07:41:35,047 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 71.21739130434783) internal successors, (1638), 23 states have internal predecessors, (1638), 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) [2023-11-19 07:41:35,052 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 168.0) internal successors, (4032), 24 states have internal predecessors, (4032), 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) [2023-11-19 07:41:35,054 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 168.0) internal successors, (4032), 24 states have internal predecessors, (4032), 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) [2023-11-19 07:41:35,054 INFO L175 Difference]: Start difference. First operand has 148 places, 138 transitions, 1466 flow. Second operand 23 states and 1638 transitions. [2023-11-19 07:41:35,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 240 transitions, 2611 flow [2023-11-19 07:41:35,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 240 transitions, 1988 flow, removed 234 selfloop flow, removed 23 redundant places. [2023-11-19 07:41:35,107 INFO L231 Difference]: Finished difference. Result has 145 places, 148 transitions, 1168 flow [2023-11-19 07:41:35,107 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=941, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1168, PETRI_PLACES=145, PETRI_TRANSITIONS=148} [2023-11-19 07:41:35,108 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 125 predicate places. [2023-11-19 07:41:35,108 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 148 transitions, 1168 flow [2023-11-19 07:41:35,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 66.91666666666667) internal successors, (1606), 24 states have internal predecessors, (1606), 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) [2023-11-19 07:41:35,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:41:35,109 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:41:35,137 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db4b714-22e4-4271-8255-bb4df4ae211f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-19 07:41:35,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db4b714-22e4-4271-8255-bb4df4ae211f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-19 07:41:35,332 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:41:35,333 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:35,333 INFO L85 PathProgramCache]: Analyzing trace with hash -14424625, now seen corresponding path program 11 times [2023-11-19 07:41:35,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:35,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660186227] [2023-11-19 07:41:35,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:35,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:35,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:35,593 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:41:35,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:41:35,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660186227] [2023-11-19 07:41:35,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660186227] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:41:35,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498751173] [2023-11-19 07:41:35,595 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-19 07:41:35,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:41:35,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db4b714-22e4-4271-8255-bb4df4ae211f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:41:35,596 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db4b714-22e4-4271-8255-bb4df4ae211f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:41:35,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db4b714-22e4-4271-8255-bb4df4ae211f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-19 07:41:35,710 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-19 07:41:35,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:41:35,712 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-19 07:41:35,713 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:41:35,967 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:41:35,967 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:41:36,217 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:41:36,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498751173] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:41:36,218 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:41:36,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 22 [2023-11-19 07:41:36,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998811267] [2023-11-19 07:41:36,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:41:36,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-19 07:41:36,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:41:36,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-19 07:41:36,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2023-11-19 07:41:36,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 168 [2023-11-19 07:41:36,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 148 transitions, 1168 flow. Second operand has 24 states, 24 states have (on average 66.875) internal successors, (1605), 24 states have internal predecessors, (1605), 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) [2023-11-19 07:41:36,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:41:36,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 168 [2023-11-19 07:41:36,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:41:38,565 INFO L124 PetriNetUnfolderBase]: 403/797 cut-off events. [2023-11-19 07:41:38,565 INFO L125 PetriNetUnfolderBase]: For 7876/7876 co-relation queries the response was YES. [2023-11-19 07:41:38,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4284 conditions, 797 events. 403/797 cut-off events. For 7876/7876 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 4046 event pairs, 18 based on Foata normal form. 5/800 useless extension candidates. Maximal degree in co-relation 4242. Up to 183 conditions per place. [2023-11-19 07:41:38,575 INFO L140 encePairwiseOnDemand]: 160/168 looper letters, 116 selfloop transitions, 115 changer transitions 25/256 dead transitions. [2023-11-19 07:41:38,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 256 transitions, 2254 flow [2023-11-19 07:41:38,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-11-19 07:41:38,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-11-19 07:41:38,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2880 transitions. [2023-11-19 07:41:38,582 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4181184668989547 [2023-11-19 07:41:38,582 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2880 transitions. [2023-11-19 07:41:38,582 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2880 transitions. [2023-11-19 07:41:38,584 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:41:38,584 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2880 transitions. [2023-11-19 07:41:38,589 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 70.2439024390244) internal successors, (2880), 41 states have internal predecessors, (2880), 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) [2023-11-19 07:41:38,605 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 168.0) internal successors, (7056), 42 states have internal predecessors, (7056), 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) [2023-11-19 07:41:38,608 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 168.0) internal successors, (7056), 42 states have internal predecessors, (7056), 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) [2023-11-19 07:41:38,608 INFO L175 Difference]: Start difference. First operand has 145 places, 148 transitions, 1168 flow. Second operand 41 states and 2880 transitions. [2023-11-19 07:41:38,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 256 transitions, 2254 flow [2023-11-19 07:41:38,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 256 transitions, 2096 flow, removed 21 selfloop flow, removed 9 redundant places. [2023-11-19 07:41:38,643 INFO L231 Difference]: Finished difference. Result has 168 places, 143 transitions, 1239 flow [2023-11-19 07:41:38,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=1013, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=1239, PETRI_PLACES=168, PETRI_TRANSITIONS=143} [2023-11-19 07:41:38,644 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 148 predicate places. [2023-11-19 07:41:38,644 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 143 transitions, 1239 flow [2023-11-19 07:41:38,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 66.875) internal successors, (1605), 24 states have internal predecessors, (1605), 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) [2023-11-19 07:41:38,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:41:38,645 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:41:38,675 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db4b714-22e4-4271-8255-bb4df4ae211f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-19 07:41:38,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db4b714-22e4-4271-8255-bb4df4ae211f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:41:38,861 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:41:38,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:38,861 INFO L85 PathProgramCache]: Analyzing trace with hash 1047861101, now seen corresponding path program 12 times [2023-11-19 07:41:38,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:38,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403313897] [2023-11-19 07:41:38,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:38,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:38,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:39,062 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:41:39,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:41:39,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403313897] [2023-11-19 07:41:39,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403313897] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:41:39,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279434419] [2023-11-19 07:41:39,063 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-19 07:41:39,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:41:39,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db4b714-22e4-4271-8255-bb4df4ae211f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:41:39,069 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db4b714-22e4-4271-8255-bb4df4ae211f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:41:39,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db4b714-22e4-4271-8255-bb4df4ae211f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-19 07:41:39,156 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-19 07:41:39,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:41:39,157 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-19 07:41:39,159 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:41:39,385 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:41:39,386 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:41:39,597 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:41:39,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279434419] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:41:39,598 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:41:39,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 22 [2023-11-19 07:41:39,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159257966] [2023-11-19 07:41:39,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:41:39,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-19 07:41:39,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:41:39,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-19 07:41:39,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2023-11-19 07:41:39,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 168 [2023-11-19 07:41:39,912 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 143 transitions, 1239 flow. Second operand has 24 states, 24 states have (on average 66.83333333333333) internal successors, (1604), 24 states have internal predecessors, (1604), 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) [2023-11-19 07:41:39,912 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:41:39,912 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 168 [2023-11-19 07:41:39,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:41:40,865 INFO L124 PetriNetUnfolderBase]: 452/886 cut-off events. [2023-11-19 07:41:40,865 INFO L125 PetriNetUnfolderBase]: For 8830/8830 co-relation queries the response was YES. [2023-11-19 07:41:40,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4987 conditions, 886 events. 452/886 cut-off events. For 8830/8830 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 4597 event pairs, 44 based on Foata normal form. 5/887 useless extension candidates. Maximal degree in co-relation 4943. Up to 476 conditions per place. [2023-11-19 07:41:40,877 INFO L140 encePairwiseOnDemand]: 160/168 looper letters, 92 selfloop transitions, 89 changer transitions 46/227 dead transitions. [2023-11-19 07:41:40,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 227 transitions, 2175 flow [2023-11-19 07:41:40,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-19 07:41:40,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-11-19 07:41:40,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 2221 transitions. [2023-11-19 07:41:40,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41313244047619047 [2023-11-19 07:41:40,882 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 2221 transitions. [2023-11-19 07:41:40,882 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 2221 transitions. [2023-11-19 07:41:40,883 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:41:40,883 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 2221 transitions. [2023-11-19 07:41:40,888 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 69.40625) internal successors, (2221), 32 states have internal predecessors, (2221), 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) [2023-11-19 07:41:40,899 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 168.0) internal successors, (5544), 33 states have internal predecessors, (5544), 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) [2023-11-19 07:41:40,901 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 168.0) internal successors, (5544), 33 states have internal predecessors, (5544), 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) [2023-11-19 07:41:40,902 INFO L175 Difference]: Start difference. First operand has 168 places, 143 transitions, 1239 flow. Second operand 32 states and 2221 transitions. [2023-11-19 07:41:40,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 227 transitions, 2175 flow [2023-11-19 07:41:40,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 227 transitions, 1917 flow, removed 9 selfloop flow, removed 34 redundant places. [2023-11-19 07:41:40,934 INFO L231 Difference]: Finished difference. Result has 166 places, 145 transitions, 1288 flow [2023-11-19 07:41:40,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=1018, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=1288, PETRI_PLACES=166, PETRI_TRANSITIONS=145} [2023-11-19 07:41:40,935 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 146 predicate places. [2023-11-19 07:41:40,935 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 145 transitions, 1288 flow [2023-11-19 07:41:40,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 66.83333333333333) internal successors, (1604), 24 states have internal predecessors, (1604), 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) [2023-11-19 07:41:40,936 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:41:40,936 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:41:40,965 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db4b714-22e4-4271-8255-bb4df4ae211f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-19 07:41:41,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db4b714-22e4-4271-8255-bb4df4ae211f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:41:41,153 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:41:41,153 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:41,153 INFO L85 PathProgramCache]: Analyzing trace with hash 1848553808, now seen corresponding path program 2 times [2023-11-19 07:41:41,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:41,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130518652] [2023-11-19 07:41:41,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:41,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:41,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:41,358 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:41:41,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:41:41,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130518652] [2023-11-19 07:41:41,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130518652] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:41:41,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880926765] [2023-11-19 07:41:41,359 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:41:41,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:41:41,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db4b714-22e4-4271-8255-bb4df4ae211f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:41:41,361 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db4b714-22e4-4271-8255-bb4df4ae211f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:41:41,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db4b714-22e4-4271-8255-bb4df4ae211f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-19 07:41:41,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:41:41,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:41:41,464 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-19 07:41:41,465 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:41:41,626 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:41:41,627 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:41:41,724 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:41:41,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880926765] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:41:41,725 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:41:41,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2023-11-19 07:41:41,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577630044] [2023-11-19 07:41:41,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:41:41,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-19 07:41:41,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:41:41,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-19 07:41:41,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2023-11-19 07:41:42,023 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 168 [2023-11-19 07:41:42,025 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 145 transitions, 1288 flow. Second operand has 20 states, 20 states have (on average 66.65) internal successors, (1333), 20 states have internal predecessors, (1333), 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) [2023-11-19 07:41:42,025 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:41:42,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 168 [2023-11-19 07:41:42,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:41:42,762 INFO L124 PetriNetUnfolderBase]: 576/1074 cut-off events. [2023-11-19 07:41:42,763 INFO L125 PetriNetUnfolderBase]: For 12139/12139 co-relation queries the response was YES. [2023-11-19 07:41:42,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6280 conditions, 1074 events. 576/1074 cut-off events. For 12139/12139 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 5608 event pairs, 34 based on Foata normal form. 9/1079 useless extension candidates. Maximal degree in co-relation 6232. Up to 587 conditions per place. [2023-11-19 07:41:42,779 INFO L140 encePairwiseOnDemand]: 160/168 looper letters, 126 selfloop transitions, 80 changer transitions 53/259 dead transitions. [2023-11-19 07:41:42,779 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 259 transitions, 2559 flow [2023-11-19 07:41:42,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-19 07:41:42,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-19 07:41:42,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1548 transitions. [2023-11-19 07:41:42,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41883116883116883 [2023-11-19 07:41:42,782 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1548 transitions. [2023-11-19 07:41:42,782 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1548 transitions. [2023-11-19 07:41:42,782 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:41:42,782 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1548 transitions. [2023-11-19 07:41:42,784 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 70.36363636363636) internal successors, (1548), 22 states have internal predecessors, (1548), 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) [2023-11-19 07:41:42,788 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 168.0) internal successors, (3864), 23 states have internal predecessors, (3864), 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) [2023-11-19 07:41:42,789 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 168.0) internal successors, (3864), 23 states have internal predecessors, (3864), 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) [2023-11-19 07:41:42,789 INFO L175 Difference]: Start difference. First operand has 166 places, 145 transitions, 1288 flow. Second operand 22 states and 1548 transitions. [2023-11-19 07:41:42,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 259 transitions, 2559 flow [2023-11-19 07:41:42,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 259 transitions, 2383 flow, removed 35 selfloop flow, removed 18 redundant places. [2023-11-19 07:41:42,885 INFO L231 Difference]: Finished difference. Result has 157 places, 168 transitions, 1594 flow [2023-11-19 07:41:42,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=1145, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1594, PETRI_PLACES=157, PETRI_TRANSITIONS=168} [2023-11-19 07:41:42,886 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 137 predicate places. [2023-11-19 07:41:42,886 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 168 transitions, 1594 flow [2023-11-19 07:41:42,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 66.65) internal successors, (1333), 20 states have internal predecessors, (1333), 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) [2023-11-19 07:41:42,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:41:42,887 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:41:42,913 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db4b714-22e4-4271-8255-bb4df4ae211f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-19 07:41:43,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db4b714-22e4-4271-8255-bb4df4ae211f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:41:43,108 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:41:43,108 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:43,108 INFO L85 PathProgramCache]: Analyzing trace with hash -1989770304, now seen corresponding path program 3 times [2023-11-19 07:41:43,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:43,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641506793] [2023-11-19 07:41:43,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:43,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:43,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:43,315 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:41:43,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:41:43,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641506793] [2023-11-19 07:41:43,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641506793] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:41:43,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676402780] [2023-11-19 07:41:43,316 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 07:41:43,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:41:43,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db4b714-22e4-4271-8255-bb4df4ae211f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:41:43,318 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db4b714-22e4-4271-8255-bb4df4ae211f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:41:43,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db4b714-22e4-4271-8255-bb4df4ae211f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-19 07:41:43,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-19 07:41:43,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:41:43,422 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-19 07:41:43,424 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:41:43,625 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:41:43,626 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:41:43,760 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:41:43,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676402780] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:41:43,760 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:41:43,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 21 [2023-11-19 07:41:43,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189136118] [2023-11-19 07:41:43,761 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:41:43,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-19 07:41:43,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:41:43,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-19 07:41:43,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2023-11-19 07:41:44,049 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 168 [2023-11-19 07:41:44,050 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 168 transitions, 1594 flow. Second operand has 23 states, 23 states have (on average 66.69565217391305) internal successors, (1534), 23 states have internal predecessors, (1534), 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) [2023-11-19 07:41:44,050 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:41:44,050 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 168 [2023-11-19 07:41:44,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:41:44,975 INFO L124 PetriNetUnfolderBase]: 554/1084 cut-off events. [2023-11-19 07:41:44,975 INFO L125 PetriNetUnfolderBase]: For 21576/21576 co-relation queries the response was YES. [2023-11-19 07:41:44,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7097 conditions, 1084 events. 554/1084 cut-off events. For 21576/21576 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 5948 event pairs, 46 based on Foata normal form. 15/1099 useless extension candidates. Maximal degree in co-relation 7045. Up to 460 conditions per place. [2023-11-19 07:41:44,989 INFO L140 encePairwiseOnDemand]: 160/168 looper letters, 137 selfloop transitions, 141 changer transitions 18/296 dead transitions. [2023-11-19 07:41:44,990 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 296 transitions, 3168 flow [2023-11-19 07:41:44,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-19 07:41:44,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-11-19 07:41:44,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 2083 transitions. [2023-11-19 07:41:44,996 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41329365079365077 [2023-11-19 07:41:44,997 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 2083 transitions. [2023-11-19 07:41:44,997 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 2083 transitions. [2023-11-19 07:41:44,998 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:41:44,998 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 2083 transitions. [2023-11-19 07:41:45,002 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 69.43333333333334) internal successors, (2083), 30 states have internal predecessors, (2083), 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) [2023-11-19 07:41:45,007 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 168.0) internal successors, (5208), 31 states have internal predecessors, (5208), 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) [2023-11-19 07:41:45,009 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 168.0) internal successors, (5208), 31 states have internal predecessors, (5208), 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) [2023-11-19 07:41:45,009 INFO L175 Difference]: Start difference. First operand has 157 places, 168 transitions, 1594 flow. Second operand 30 states and 2083 transitions. [2023-11-19 07:41:45,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 296 transitions, 3168 flow [2023-11-19 07:41:45,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 296 transitions, 2928 flow, removed 81 selfloop flow, removed 10 redundant places. [2023-11-19 07:41:45,083 INFO L231 Difference]: Finished difference. Result has 173 places, 224 transitions, 2392 flow [2023-11-19 07:41:45,083 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=1439, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=2392, PETRI_PLACES=173, PETRI_TRANSITIONS=224} [2023-11-19 07:41:45,084 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 153 predicate places. [2023-11-19 07:41:45,084 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 224 transitions, 2392 flow [2023-11-19 07:41:45,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 66.69565217391305) internal successors, (1534), 23 states have internal predecessors, (1534), 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) [2023-11-19 07:41:45,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:41:45,085 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:41:45,112 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db4b714-22e4-4271-8255-bb4df4ae211f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-19 07:41:45,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db4b714-22e4-4271-8255-bb4df4ae211f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-11-19 07:41:45,301 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:41:45,301 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:45,301 INFO L85 PathProgramCache]: Analyzing trace with hash -2017475934, now seen corresponding path program 4 times [2023-11-19 07:41:45,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:45,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615681348] [2023-11-19 07:41:45,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:45,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:45,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:45,500 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:41:45,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:41:45,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615681348] [2023-11-19 07:41:45,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615681348] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:41:45,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272046424] [2023-11-19 07:41:45,501 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-19 07:41:45,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:41:45,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db4b714-22e4-4271-8255-bb4df4ae211f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:41:45,502 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db4b714-22e4-4271-8255-bb4df4ae211f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:41:45,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db4b714-22e4-4271-8255-bb4df4ae211f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-19 07:41:45,590 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-19 07:41:45,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:41:45,591 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-19 07:41:45,594 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:41:45,790 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:41:45,790 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:41:45,923 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:41:45,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272046424] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:41:45,924 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:41:45,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 19 [2023-11-19 07:41:45,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303640905] [2023-11-19 07:41:45,924 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:41:45,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-19 07:41:45,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:41:45,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-19 07:41:45,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2023-11-19 07:41:46,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 168 [2023-11-19 07:41:46,256 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 224 transitions, 2392 flow. Second operand has 21 states, 21 states have (on average 66.57142857142857) internal successors, (1398), 21 states have internal predecessors, (1398), 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) [2023-11-19 07:41:46,257 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:41:46,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 168 [2023-11-19 07:41:46,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:41:47,218 INFO L124 PetriNetUnfolderBase]: 553/1079 cut-off events. [2023-11-19 07:41:47,219 INFO L125 PetriNetUnfolderBase]: For 13245/13245 co-relation queries the response was YES. [2023-11-19 07:41:47,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6469 conditions, 1079 events. 553/1079 cut-off events. For 13245/13245 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 5847 event pairs, 38 based on Foata normal form. 5/1084 useless extension candidates. Maximal degree in co-relation 6419. Up to 476 conditions per place. [2023-11-19 07:41:47,232 INFO L140 encePairwiseOnDemand]: 160/168 looper letters, 133 selfloop transitions, 139 changer transitions 24/296 dead transitions. [2023-11-19 07:41:47,232 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 296 transitions, 3336 flow [2023-11-19 07:41:47,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-19 07:41:47,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-11-19 07:41:47,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1874 transitions. [2023-11-19 07:41:47,235 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4131393298059965 [2023-11-19 07:41:47,236 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1874 transitions. [2023-11-19 07:41:47,236 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1874 transitions. [2023-11-19 07:41:47,237 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:41:47,237 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1874 transitions. [2023-11-19 07:41:47,241 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 69.4074074074074) internal successors, (1874), 27 states have internal predecessors, (1874), 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) [2023-11-19 07:41:47,246 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 168.0) internal successors, (4704), 28 states have internal predecessors, (4704), 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) [2023-11-19 07:41:47,247 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 168.0) internal successors, (4704), 28 states have internal predecessors, (4704), 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) [2023-11-19 07:41:47,247 INFO L175 Difference]: Start difference. First operand has 173 places, 224 transitions, 2392 flow. Second operand 27 states and 1874 transitions. [2023-11-19 07:41:47,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 296 transitions, 3336 flow [2023-11-19 07:41:47,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 296 transitions, 2821 flow, removed 200 selfloop flow, removed 16 redundant places. [2023-11-19 07:41:47,331 INFO L231 Difference]: Finished difference. Result has 179 places, 224 transitions, 2203 flow [2023-11-19 07:41:47,331 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=1878, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=2203, PETRI_PLACES=179, PETRI_TRANSITIONS=224} [2023-11-19 07:41:47,332 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 159 predicate places. [2023-11-19 07:41:47,332 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 224 transitions, 2203 flow [2023-11-19 07:41:47,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 66.57142857142857) internal successors, (1398), 21 states have internal predecessors, (1398), 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) [2023-11-19 07:41:47,333 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:41:47,333 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:41:47,362 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db4b714-22e4-4271-8255-bb4df4ae211f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-19 07:41:47,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db4b714-22e4-4271-8255-bb4df4ae211f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-11-19 07:41:47,556 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:41:47,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:47,557 INFO L85 PathProgramCache]: Analyzing trace with hash -1908825840, now seen corresponding path program 5 times [2023-11-19 07:41:47,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:47,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353220781] [2023-11-19 07:41:47,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:47,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:47,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:47,737 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:41:47,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:41:47,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353220781] [2023-11-19 07:41:47,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353220781] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:41:47,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087107477] [2023-11-19 07:41:47,738 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-19 07:41:47,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:41:47,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db4b714-22e4-4271-8255-bb4df4ae211f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:41:47,739 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db4b714-22e4-4271-8255-bb4df4ae211f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:41:47,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db4b714-22e4-4271-8255-bb4df4ae211f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-19 07:41:47,837 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:41:47,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:41:47,839 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-19 07:41:47,843 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:41:47,986 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:41:47,987 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:41:48,096 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:41:48,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087107477] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:41:48,097 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:41:48,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2023-11-19 07:41:48,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132700020] [2023-11-19 07:41:48,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:41:48,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-19 07:41:48,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:41:48,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-19 07:41:48,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2023-11-19 07:41:48,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 168 [2023-11-19 07:41:48,410 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 224 transitions, 2203 flow. Second operand has 20 states, 20 states have (on average 66.6) internal successors, (1332), 20 states have internal predecessors, (1332), 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) [2023-11-19 07:41:48,410 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:41:48,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 168 [2023-11-19 07:41:48,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:41:49,060 INFO L124 PetriNetUnfolderBase]: 626/1189 cut-off events. [2023-11-19 07:41:49,060 INFO L125 PetriNetUnfolderBase]: For 5018/5018 co-relation queries the response was YES. [2023-11-19 07:41:49,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6142 conditions, 1189 events. 626/1189 cut-off events. For 5018/5018 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 6485 event pairs, 19 based on Foata normal form. 10/1199 useless extension candidates. Maximal degree in co-relation 6098. Up to 564 conditions per place. [2023-11-19 07:41:49,071 INFO L140 encePairwiseOnDemand]: 160/168 looper letters, 170 selfloop transitions, 80 changer transitions 67/317 dead transitions. [2023-11-19 07:41:49,071 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 317 transitions, 3473 flow [2023-11-19 07:41:49,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-19 07:41:49,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-19 07:41:49,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1536 transitions. [2023-11-19 07:41:49,073 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4155844155844156 [2023-11-19 07:41:49,073 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1536 transitions. [2023-11-19 07:41:49,074 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1536 transitions. [2023-11-19 07:41:49,074 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:41:49,075 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1536 transitions. [2023-11-19 07:41:49,077 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 69.81818181818181) internal successors, (1536), 22 states have internal predecessors, (1536), 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) [2023-11-19 07:41:49,081 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 168.0) internal successors, (3864), 23 states have internal predecessors, (3864), 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) [2023-11-19 07:41:49,082 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 168.0) internal successors, (3864), 23 states have internal predecessors, (3864), 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) [2023-11-19 07:41:49,083 INFO L175 Difference]: Start difference. First operand has 179 places, 224 transitions, 2203 flow. Second operand 22 states and 1536 transitions. [2023-11-19 07:41:49,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 317 transitions, 3473 flow [2023-11-19 07:41:49,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 317 transitions, 3144 flow, removed 34 selfloop flow, removed 19 redundant places. [2023-11-19 07:41:49,129 INFO L231 Difference]: Finished difference. Result has 187 places, 216 transitions, 2127 flow [2023-11-19 07:41:49,129 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=1917, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=2127, PETRI_PLACES=187, PETRI_TRANSITIONS=216} [2023-11-19 07:41:49,130 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 167 predicate places. [2023-11-19 07:41:49,130 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 216 transitions, 2127 flow [2023-11-19 07:41:49,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 66.6) internal successors, (1332), 20 states have internal predecessors, (1332), 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) [2023-11-19 07:41:49,131 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:41:49,131 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:41:49,159 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db4b714-22e4-4271-8255-bb4df4ae211f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-19 07:41:49,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db4b714-22e4-4271-8255-bb4df4ae211f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-19 07:41:49,342 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:41:49,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:49,343 INFO L85 PathProgramCache]: Analyzing trace with hash 254023295, now seen corresponding path program 13 times [2023-11-19 07:41:49,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:49,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671229838] [2023-11-19 07:41:49,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:49,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:49,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:49,536 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:41:49,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:41:49,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671229838] [2023-11-19 07:41:49,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671229838] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:41:49,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538668085] [2023-11-19 07:41:49,537 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-19 07:41:49,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:41:49,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db4b714-22e4-4271-8255-bb4df4ae211f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:41:49,539 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db4b714-22e4-4271-8255-bb4df4ae211f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:41:49,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db4b714-22e4-4271-8255-bb4df4ae211f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-19 07:41:49,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:49,633 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-19 07:41:49,634 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:41:49,853 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:41:49,853 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:41:50,062 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:41:50,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538668085] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:41:50,063 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:41:50,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 22 [2023-11-19 07:41:50,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901985489] [2023-11-19 07:41:50,064 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:41:50,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-19 07:41:50,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:41:50,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-19 07:41:50,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2023-11-19 07:41:50,457 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 168 [2023-11-19 07:41:50,458 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 216 transitions, 2127 flow. Second operand has 24 states, 24 states have (on average 66.83333333333333) internal successors, (1604), 24 states have internal predecessors, (1604), 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) [2023-11-19 07:41:50,458 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:41:50,458 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 168 [2023-11-19 07:41:50,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand