./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-more-buffer-mult2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b 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_21c96627-6244-4ca5-b9f7-f007a9499268/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c96627-6244-4ca5-b9f7-f007a9499268/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c96627-6244-4ca5-b9f7-f007a9499268/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c96627-6244-4ca5-b9f7-f007a9499268/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-buffer-mult2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c96627-6244-4ca5-b9f7-f007a9499268/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c96627-6244-4ca5-b9f7-f007a9499268/bin/uautomizer-verify-WvqO1wxjHP --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash df820220e47314ad1ae7e5e69c959ff16aa366a463fd9290864972c0f85d142a --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 21:57:57,625 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 21:57:57,757 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c96627-6244-4ca5-b9f7-f007a9499268/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 21:57:57,765 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 21:57:57,767 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 21:57:57,809 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 21:57:57,810 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 21:57:57,811 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 21:57:57,812 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 21:57:57,818 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 21:57:57,819 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 21:57:57,819 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 21:57:57,820 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 21:57:57,822 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 21:57:57,823 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 21:57:57,823 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 21:57:57,824 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 21:57:57,824 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 21:57:57,825 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 21:57:57,825 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 21:57:57,826 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 21:57:57,827 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 21:57:57,827 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 21:57:57,828 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 21:57:57,828 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 21:57:57,830 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 21:57:57,830 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 21:57:57,831 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 21:57:57,831 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 21:57:57,832 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 21:57:57,834 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 21:57:57,834 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 21:57:57,835 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 21:57:57,835 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 21:57:57,835 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 21:57:57,836 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 21:57:57,836 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 21:57:57,836 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 21:57:57,837 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 21:57:57,837 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_21c96627-6244-4ca5-b9f7-f007a9499268/bin/uautomizer-verify-WvqO1wxjHP/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c96627-6244-4ca5-b9f7-f007a9499268/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> df820220e47314ad1ae7e5e69c959ff16aa366a463fd9290864972c0f85d142a [2023-11-06 21:57:58,196 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 21:57:58,248 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 21:57:58,251 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 21:57:58,253 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 21:57:58,254 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 21:57:58,255 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c96627-6244-4ca5-b9f7-f007a9499268/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/weaver/popl20-more-buffer-mult2.wvr.c [2023-11-06 21:58:01,637 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 21:58:01,888 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 21:58:01,888 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c96627-6244-4ca5-b9f7-f007a9499268/sv-benchmarks/c/weaver/popl20-more-buffer-mult2.wvr.c [2023-11-06 21:58:01,899 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c96627-6244-4ca5-b9f7-f007a9499268/bin/uautomizer-verify-WvqO1wxjHP/data/7eacad1aa/9e8dcb659ea443a38e0e855b991565fe/FLAGe97fa135d [2023-11-06 21:58:01,919 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c96627-6244-4ca5-b9f7-f007a9499268/bin/uautomizer-verify-WvqO1wxjHP/data/7eacad1aa/9e8dcb659ea443a38e0e855b991565fe [2023-11-06 21:58:01,922 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 21:58:01,924 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 21:58:01,926 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 21:58:01,926 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 21:58:01,933 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 21:58:01,934 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:58:01" (1/1) ... [2023-11-06 21:58:01,935 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7740276b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:58:01, skipping insertion in model container [2023-11-06 21:58:01,935 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:58:01" (1/1) ... [2023-11-06 21:58:01,978 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 21:58:02,226 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_21c96627-6244-4ca5-b9f7-f007a9499268/sv-benchmarks/c/weaver/popl20-more-buffer-mult2.wvr.c[4099,4112] [2023-11-06 21:58:02,239 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 21:58:02,252 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 21:58:02,307 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_21c96627-6244-4ca5-b9f7-f007a9499268/sv-benchmarks/c/weaver/popl20-more-buffer-mult2.wvr.c[4099,4112] [2023-11-06 21:58:02,312 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 21:58:02,327 WARN L672 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 21:58:02,327 WARN L672 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 21:58:02,336 INFO L206 MainTranslator]: Completed translation [2023-11-06 21:58:02,337 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:58:02 WrapperNode [2023-11-06 21:58:02,338 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 21:58:02,341 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 21:58:02,341 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 21:58:02,342 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 21:58:02,348 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:58:02" (1/1) ... [2023-11-06 21:58:02,358 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:58:02" (1/1) ... [2023-11-06 21:58:02,397 INFO L138 Inliner]: procedures = 27, calls = 76, calls flagged for inlining = 18, calls inlined = 22, statements flattened = 312 [2023-11-06 21:58:02,398 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 21:58:02,398 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 21:58:02,399 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 21:58:02,399 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 21:58:02,409 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:58:02" (1/1) ... [2023-11-06 21:58:02,409 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:58:02" (1/1) ... [2023-11-06 21:58:02,414 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:58:02" (1/1) ... [2023-11-06 21:58:02,415 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:58:02" (1/1) ... [2023-11-06 21:58:02,427 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:58:02" (1/1) ... [2023-11-06 21:58:02,432 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:58:02" (1/1) ... [2023-11-06 21:58:02,436 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:58:02" (1/1) ... [2023-11-06 21:58:02,438 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:58:02" (1/1) ... [2023-11-06 21:58:02,443 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 21:58:02,444 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 21:58:02,445 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 21:58:02,445 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 21:58:02,446 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:58:02" (1/1) ... [2023-11-06 21:58:02,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 21:58:02,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c96627-6244-4ca5-b9f7-f007a9499268/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:58:02,481 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c96627-6244-4ca5-b9f7-f007a9499268/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 21:58:02,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c96627-6244-4ca5-b9f7-f007a9499268/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 21:58:02,514 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 21:58:02,515 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 21:58:02,515 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 21:58:02,515 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 21:58:02,515 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-06 21:58:02,516 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-06 21:58:02,516 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-06 21:58:02,516 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-06 21:58:02,516 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-06 21:58:02,516 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-06 21:58:02,516 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-11-06 21:58:02,517 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-11-06 21:58:02,517 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 21:58:02,517 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-06 21:58:02,517 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-06 21:58:02,517 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-06 21:58:02,518 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 21:58:02,518 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 21:58:02,518 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 21:58:02,520 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-06 21:58:02,650 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 21:58:02,652 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 21:58:03,308 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 21:58:03,553 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 21:58:03,553 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-11-06 21:58:03,556 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:58:03 BoogieIcfgContainer [2023-11-06 21:58:03,557 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 21:58:03,560 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 21:58:03,560 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 21:58:03,564 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 21:58:03,565 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 09:58:01" (1/3) ... [2023-11-06 21:58:03,566 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72ab1b2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:58:03, skipping insertion in model container [2023-11-06 21:58:03,566 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:58:02" (2/3) ... [2023-11-06 21:58:03,567 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72ab1b2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:58:03, skipping insertion in model container [2023-11-06 21:58:03,567 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:58:03" (3/3) ... [2023-11-06 21:58:03,569 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-buffer-mult2.wvr.c [2023-11-06 21:58:03,581 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-06 21:58:03,595 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 21:58:03,595 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 21:58:03,596 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 21:58:03,712 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-06 21:58:03,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 230 places, 235 transitions, 498 flow [2023-11-06 21:58:03,870 INFO L124 PetriNetUnfolderBase]: 18/231 cut-off events. [2023-11-06 21:58:03,871 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-06 21:58:03,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 248 conditions, 231 events. 18/231 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 116 event pairs, 0 based on Foata normal form. 0/212 useless extension candidates. Maximal degree in co-relation 192. Up to 2 conditions per place. [2023-11-06 21:58:03,879 INFO L82 GeneralOperation]: Start removeDead. Operand has 230 places, 235 transitions, 498 flow [2023-11-06 21:58:03,887 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 213 places, 218 transitions, 460 flow [2023-11-06 21:58:03,891 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 21:58:03,902 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 213 places, 218 transitions, 460 flow [2023-11-06 21:58:03,906 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 213 places, 218 transitions, 460 flow [2023-11-06 21:58:03,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 213 places, 218 transitions, 460 flow [2023-11-06 21:58:04,061 INFO L124 PetriNetUnfolderBase]: 18/218 cut-off events. [2023-11-06 21:58:04,062 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-06 21:58:04,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 235 conditions, 218 events. 18/218 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 113 event pairs, 0 based on Foata normal form. 0/200 useless extension candidates. Maximal degree in co-relation 192. Up to 2 conditions per place. [2023-11-06 21:58:04,066 INFO L119 LiptonReduction]: Number of co-enabled transitions 1824 [2023-11-06 21:58:15,682 INFO L134 LiptonReduction]: Checked pairs total: 2918 [2023-11-06 21:58:15,682 INFO L136 LiptonReduction]: Total number of compositions: 220 [2023-11-06 21:58:15,698 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 21:58:15,704 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@4d9ca6f7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 21:58:15,705 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-06 21:58:15,713 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 21:58:15,713 INFO L124 PetriNetUnfolderBase]: 6/34 cut-off events. [2023-11-06 21:58:15,713 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-06 21:58:15,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:58:15,714 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:58:15,715 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-06 21:58:15,720 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:58:15,720 INFO L85 PathProgramCache]: Analyzing trace with hash -1989709187, now seen corresponding path program 1 times [2023-11-06 21:58:15,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:58:15,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123517349] [2023-11-06 21:58:15,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:15,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:58:15,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:16,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:58:16,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:58:16,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123517349] [2023-11-06 21:58:16,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123517349] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:58:16,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:58:16,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 21:58:16,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764736517] [2023-11-06 21:58:16,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:58:16,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:58:16,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:58:16,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:58:16,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:58:16,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 455 [2023-11-06 21:58:16,299 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 216.66666666666666) internal successors, (650), 3 states have internal predecessors, (650), 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) [2023-11-06 21:58:16,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:58:16,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 455 [2023-11-06 21:58:16,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:58:16,706 INFO L124 PetriNetUnfolderBase]: 1619/2220 cut-off events. [2023-11-06 21:58:16,707 INFO L125 PetriNetUnfolderBase]: For 143/143 co-relation queries the response was YES. [2023-11-06 21:58:16,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4419 conditions, 2220 events. 1619/2220 cut-off events. For 143/143 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 8983 event pairs, 272 based on Foata normal form. 1/1329 useless extension candidates. Maximal degree in co-relation 3420. Up to 1413 conditions per place. [2023-11-06 21:58:16,733 INFO L140 encePairwiseOnDemand]: 451/455 looper letters, 43 selfloop transitions, 3 changer transitions 1/53 dead transitions. [2023-11-06 21:58:16,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 53 transitions, 239 flow [2023-11-06 21:58:16,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:58:16,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 21:58:16,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 675 transitions. [2023-11-06 21:58:16,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4945054945054945 [2023-11-06 21:58:16,761 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 675 transitions. [2023-11-06 21:58:16,761 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 675 transitions. [2023-11-06 21:58:16,767 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:58:16,769 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 675 transitions. [2023-11-06 21:58:16,777 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 225.0) internal successors, (675), 3 states have internal predecessors, (675), 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) [2023-11-06 21:58:16,786 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 455.0) internal successors, (1820), 4 states have internal predecessors, (1820), 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) [2023-11-06 21:58:16,787 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 455.0) internal successors, (1820), 4 states have internal predecessors, (1820), 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) [2023-11-06 21:58:16,789 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 94 flow. Second operand 3 states and 675 transitions. [2023-11-06 21:58:16,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 53 transitions, 239 flow [2023-11-06 21:58:16,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 53 transitions, 213 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-11-06 21:58:16,801 INFO L231 Difference]: Finished difference. Result has 37 places, 37 transitions, 97 flow [2023-11-06 21:58:16,804 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=455, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=97, PETRI_PLACES=37, PETRI_TRANSITIONS=37} [2023-11-06 21:58:16,808 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -5 predicate places. [2023-11-06 21:58:16,809 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 37 transitions, 97 flow [2023-11-06 21:58:16,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 216.66666666666666) internal successors, (650), 3 states have internal predecessors, (650), 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) [2023-11-06 21:58:16,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:58:16,811 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:58:16,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 21:58:16,811 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-06 21:58:16,813 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:58:16,813 INFO L85 PathProgramCache]: Analyzing trace with hash 679564903, now seen corresponding path program 1 times [2023-11-06 21:58:16,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:58:16,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519387552] [2023-11-06 21:58:16,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:16,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:58:16,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:17,097 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:58:17,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:58:17,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519387552] [2023-11-06 21:58:17,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519387552] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:58:17,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:58:17,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 21:58:17,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981967694] [2023-11-06 21:58:17,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:58:17,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:58:17,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:58:17,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:58:17,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:58:17,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 206 out of 455 [2023-11-06 21:58:17,112 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 37 transitions, 97 flow. Second operand has 3 states, 3 states have (on average 214.0) internal successors, (642), 3 states have internal predecessors, (642), 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) [2023-11-06 21:58:17,113 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:58:17,113 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 206 of 455 [2023-11-06 21:58:17,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:58:17,484 INFO L124 PetriNetUnfolderBase]: 1709/2322 cut-off events. [2023-11-06 21:58:17,484 INFO L125 PetriNetUnfolderBase]: For 465/465 co-relation queries the response was YES. [2023-11-06 21:58:17,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5150 conditions, 2322 events. 1709/2322 cut-off events. For 465/465 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 9718 event pairs, 425 based on Foata normal form. 86/1878 useless extension candidates. Maximal degree in co-relation 1764. Up to 1509 conditions per place. [2023-11-06 21:58:17,503 INFO L140 encePairwiseOnDemand]: 452/455 looper letters, 52 selfloop transitions, 2 changer transitions 0/60 dead transitions. [2023-11-06 21:58:17,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 60 transitions, 265 flow [2023-11-06 21:58:17,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:58:17,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 21:58:17,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 670 transitions. [2023-11-06 21:58:17,507 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4908424908424908 [2023-11-06 21:58:17,507 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 670 transitions. [2023-11-06 21:58:17,507 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 670 transitions. [2023-11-06 21:58:17,508 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:58:17,508 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 670 transitions. [2023-11-06 21:58:17,510 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 223.33333333333334) internal successors, (670), 3 states have internal predecessors, (670), 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) [2023-11-06 21:58:17,514 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 455.0) internal successors, (1820), 4 states have internal predecessors, (1820), 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) [2023-11-06 21:58:17,515 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 455.0) internal successors, (1820), 4 states have internal predecessors, (1820), 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) [2023-11-06 21:58:17,515 INFO L175 Difference]: Start difference. First operand has 37 places, 37 transitions, 97 flow. Second operand 3 states and 670 transitions. [2023-11-06 21:58:17,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 60 transitions, 265 flow [2023-11-06 21:58:17,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 60 transitions, 261 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 21:58:17,518 INFO L231 Difference]: Finished difference. Result has 39 places, 38 transitions, 108 flow [2023-11-06 21:58:17,519 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=455, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=108, PETRI_PLACES=39, PETRI_TRANSITIONS=38} [2023-11-06 21:58:17,520 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -3 predicate places. [2023-11-06 21:58:17,520 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 38 transitions, 108 flow [2023-11-06 21:58:17,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 214.0) internal successors, (642), 3 states have internal predecessors, (642), 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) [2023-11-06 21:58:17,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:58:17,521 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:58:17,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 21:58:17,522 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-06 21:58:17,522 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:58:17,522 INFO L85 PathProgramCache]: Analyzing trace with hash -1068277596, now seen corresponding path program 1 times [2023-11-06 21:58:17,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:58:17,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617768142] [2023-11-06 21:58:17,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:17,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:58:17,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:17,650 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:58:17,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:58:17,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617768142] [2023-11-06 21:58:17,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617768142] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:58:17,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:58:17,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 21:58:17,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197942207] [2023-11-06 21:58:17,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:58:17,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:58:17,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:58:17,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:58:17,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:58:17,667 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 206 out of 455 [2023-11-06 21:58:17,668 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 38 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 214.0) internal successors, (642), 3 states have internal predecessors, (642), 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) [2023-11-06 21:58:17,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:58:17,669 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 206 of 455 [2023-11-06 21:58:17,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:58:18,107 INFO L124 PetriNetUnfolderBase]: 1669/2396 cut-off events. [2023-11-06 21:58:18,108 INFO L125 PetriNetUnfolderBase]: For 1005/1005 co-relation queries the response was YES. [2023-11-06 21:58:18,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5577 conditions, 2396 events. 1669/2396 cut-off events. For 1005/1005 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 11127 event pairs, 475 based on Foata normal form. 66/2157 useless extension candidates. Maximal degree in co-relation 3727. Up to 1541 conditions per place. [2023-11-06 21:58:18,130 INFO L140 encePairwiseOnDemand]: 452/455 looper letters, 52 selfloop transitions, 2 changer transitions 0/60 dead transitions. [2023-11-06 21:58:18,130 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 60 transitions, 281 flow [2023-11-06 21:58:18,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:58:18,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 21:58:18,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 668 transitions. [2023-11-06 21:58:18,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48937728937728936 [2023-11-06 21:58:18,134 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 668 transitions. [2023-11-06 21:58:18,135 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 668 transitions. [2023-11-06 21:58:18,136 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:58:18,136 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 668 transitions. [2023-11-06 21:58:18,138 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 222.66666666666666) internal successors, (668), 3 states have internal predecessors, (668), 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) [2023-11-06 21:58:18,143 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 455.0) internal successors, (1820), 4 states have internal predecessors, (1820), 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) [2023-11-06 21:58:18,144 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 455.0) internal successors, (1820), 4 states have internal predecessors, (1820), 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) [2023-11-06 21:58:18,145 INFO L175 Difference]: Start difference. First operand has 39 places, 38 transitions, 108 flow. Second operand 3 states and 668 transitions. [2023-11-06 21:58:18,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 60 transitions, 281 flow [2023-11-06 21:58:18,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 60 transitions, 278 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 21:58:18,149 INFO L231 Difference]: Finished difference. Result has 41 places, 39 transitions, 120 flow [2023-11-06 21:58:18,149 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=455, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=120, PETRI_PLACES=41, PETRI_TRANSITIONS=39} [2023-11-06 21:58:18,151 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -1 predicate places. [2023-11-06 21:58:18,155 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 39 transitions, 120 flow [2023-11-06 21:58:18,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 214.0) internal successors, (642), 3 states have internal predecessors, (642), 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) [2023-11-06 21:58:18,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:58:18,157 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:58:18,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 21:58:18,157 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-06 21:58:18,158 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:58:18,158 INFO L85 PathProgramCache]: Analyzing trace with hash -45192325, now seen corresponding path program 1 times [2023-11-06 21:58:18,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:58:18,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884775708] [2023-11-06 21:58:18,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:18,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:58:18,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:18,474 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 21:58:18,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:58:18,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884775708] [2023-11-06 21:58:18,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884775708] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:58:18,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:58:18,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 21:58:18,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499851901] [2023-11-06 21:58:18,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:58:18,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 21:58:18,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:58:18,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 21:58:18,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:58:18,600 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 455 [2023-11-06 21:58:18,602 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 39 transitions, 120 flow. Second operand has 4 states, 4 states have (on average 202.25) internal successors, (809), 4 states have internal predecessors, (809), 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) [2023-11-06 21:58:18,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:58:18,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 455 [2023-11-06 21:58:18,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:58:19,174 INFO L124 PetriNetUnfolderBase]: 2087/3077 cut-off events. [2023-11-06 21:58:19,174 INFO L125 PetriNetUnfolderBase]: For 1721/1721 co-relation queries the response was YES. [2023-11-06 21:58:19,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7579 conditions, 3077 events. 2087/3077 cut-off events. For 1721/1721 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 15907 event pairs, 1506 based on Foata normal form. 73/3057 useless extension candidates. Maximal degree in co-relation 3708. Up to 2237 conditions per place. [2023-11-06 21:58:19,203 INFO L140 encePairwiseOnDemand]: 451/455 looper letters, 58 selfloop transitions, 3 changer transitions 0/67 dead transitions. [2023-11-06 21:58:19,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 67 transitions, 321 flow [2023-11-06 21:58:19,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 21:58:19,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 21:58:19,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 840 transitions. [2023-11-06 21:58:19,208 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46153846153846156 [2023-11-06 21:58:19,208 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 840 transitions. [2023-11-06 21:58:19,208 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 840 transitions. [2023-11-06 21:58:19,209 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:58:19,209 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 840 transitions. [2023-11-06 21:58:19,212 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 210.0) internal successors, (840), 4 states have internal predecessors, (840), 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) [2023-11-06 21:58:19,217 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 455.0) internal successors, (2275), 5 states have internal predecessors, (2275), 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) [2023-11-06 21:58:19,220 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 455.0) internal successors, (2275), 5 states have internal predecessors, (2275), 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) [2023-11-06 21:58:19,220 INFO L175 Difference]: Start difference. First operand has 41 places, 39 transitions, 120 flow. Second operand 4 states and 840 transitions. [2023-11-06 21:58:19,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 67 transitions, 321 flow [2023-11-06 21:58:19,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 67 transitions, 318 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 21:58:19,225 INFO L231 Difference]: Finished difference. Result has 45 places, 41 transitions, 138 flow [2023-11-06 21:58:19,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=455, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=138, PETRI_PLACES=45, PETRI_TRANSITIONS=41} [2023-11-06 21:58:19,226 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 3 predicate places. [2023-11-06 21:58:19,226 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 41 transitions, 138 flow [2023-11-06 21:58:19,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 202.25) internal successors, (809), 4 states have internal predecessors, (809), 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) [2023-11-06 21:58:19,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:58:19,228 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:58:19,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-06 21:58:19,228 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-06 21:58:19,229 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:58:19,229 INFO L85 PathProgramCache]: Analyzing trace with hash -1494749664, now seen corresponding path program 1 times [2023-11-06 21:58:19,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:58:19,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315316609] [2023-11-06 21:58:19,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:19,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:58:19,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:19,414 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 21:58:19,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:58:19,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315316609] [2023-11-06 21:58:19,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315316609] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:58:19,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:58:19,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 21:58:19,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092201546] [2023-11-06 21:58:19,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:58:19,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 21:58:19,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:58:19,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 21:58:19,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:58:19,505 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 455 [2023-11-06 21:58:19,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 41 transitions, 138 flow. Second operand has 4 states, 4 states have (on average 202.25) internal successors, (809), 4 states have internal predecessors, (809), 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) [2023-11-06 21:58:19,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:58:19,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 455 [2023-11-06 21:58:19,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:58:20,208 INFO L124 PetriNetUnfolderBase]: 2699/4093 cut-off events. [2023-11-06 21:58:20,208 INFO L125 PetriNetUnfolderBase]: For 2292/2292 co-relation queries the response was YES. [2023-11-06 21:58:20,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9810 conditions, 4093 events. 2699/4093 cut-off events. For 2292/2292 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 23301 event pairs, 2028 based on Foata normal form. 139/4111 useless extension candidates. Maximal degree in co-relation 7649. Up to 2946 conditions per place. [2023-11-06 21:58:20,243 INFO L140 encePairwiseOnDemand]: 451/455 looper letters, 57 selfloop transitions, 4 changer transitions 0/67 dead transitions. [2023-11-06 21:58:20,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 67 transitions, 336 flow [2023-11-06 21:58:20,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 21:58:20,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 21:58:20,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 838 transitions. [2023-11-06 21:58:20,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4604395604395604 [2023-11-06 21:58:20,248 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 838 transitions. [2023-11-06 21:58:20,248 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 838 transitions. [2023-11-06 21:58:20,249 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:58:20,249 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 838 transitions. [2023-11-06 21:58:20,252 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 209.5) internal successors, (838), 4 states have internal predecessors, (838), 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) [2023-11-06 21:58:20,257 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 455.0) internal successors, (2275), 5 states have internal predecessors, (2275), 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) [2023-11-06 21:58:20,259 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 455.0) internal successors, (2275), 5 states have internal predecessors, (2275), 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) [2023-11-06 21:58:20,260 INFO L175 Difference]: Start difference. First operand has 45 places, 41 transitions, 138 flow. Second operand 4 states and 838 transitions. [2023-11-06 21:58:20,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 67 transitions, 336 flow [2023-11-06 21:58:20,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 67 transitions, 332 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-06 21:58:20,267 INFO L231 Difference]: Finished difference. Result has 49 places, 43 transitions, 157 flow [2023-11-06 21:58:20,268 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=455, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=157, PETRI_PLACES=49, PETRI_TRANSITIONS=43} [2023-11-06 21:58:20,271 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 7 predicate places. [2023-11-06 21:58:20,271 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 43 transitions, 157 flow [2023-11-06 21:58:20,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 202.25) internal successors, (809), 4 states have internal predecessors, (809), 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) [2023-11-06 21:58:20,273 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:58:20,273 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:58:20,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-06 21:58:20,273 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-06 21:58:20,274 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:58:20,274 INFO L85 PathProgramCache]: Analyzing trace with hash -1978949494, now seen corresponding path program 1 times [2023-11-06 21:58:20,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:58:20,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265384001] [2023-11-06 21:58:20,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:20,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:58:20,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:20,863 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 21:58:20,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:58:20,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265384001] [2023-11-06 21:58:20,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265384001] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:58:20,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:58:20,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 21:58:20,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030347635] [2023-11-06 21:58:20,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:58:20,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 21:58:20,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:58:20,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 21:58:20,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-06 21:58:20,967 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 455 [2023-11-06 21:58:20,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 43 transitions, 157 flow. Second operand has 6 states, 6 states have (on average 205.66666666666666) internal successors, (1234), 6 states have internal predecessors, (1234), 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) [2023-11-06 21:58:20,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:58:20,971 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 455 [2023-11-06 21:58:20,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:58:22,231 INFO L124 PetriNetUnfolderBase]: 4627/7058 cut-off events. [2023-11-06 21:58:22,231 INFO L125 PetriNetUnfolderBase]: For 3055/3065 co-relation queries the response was YES. [2023-11-06 21:58:22,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16613 conditions, 7058 events. 4627/7058 cut-off events. For 3055/3065 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 43642 event pairs, 818 based on Foata normal form. 126/7146 useless extension candidates. Maximal degree in co-relation 11861. Up to 3998 conditions per place. [2023-11-06 21:58:22,284 INFO L140 encePairwiseOnDemand]: 449/455 looper letters, 86 selfloop transitions, 7 changer transitions 25/122 dead transitions. [2023-11-06 21:58:22,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 122 transitions, 602 flow [2023-11-06 21:58:22,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 21:58:22,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-06 21:58:22,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1518 transitions. [2023-11-06 21:58:22,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47660910518053373 [2023-11-06 21:58:22,291 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1518 transitions. [2023-11-06 21:58:22,291 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1518 transitions. [2023-11-06 21:58:22,292 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:58:22,292 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1518 transitions. [2023-11-06 21:58:22,297 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 216.85714285714286) internal successors, (1518), 7 states have internal predecessors, (1518), 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) [2023-11-06 21:58:22,304 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 455.0) internal successors, (3640), 8 states have internal predecessors, (3640), 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) [2023-11-06 21:58:22,305 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 455.0) internal successors, (3640), 8 states have internal predecessors, (3640), 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) [2023-11-06 21:58:22,306 INFO L175 Difference]: Start difference. First operand has 49 places, 43 transitions, 157 flow. Second operand 7 states and 1518 transitions. [2023-11-06 21:58:22,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 122 transitions, 602 flow [2023-11-06 21:58:22,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 122 transitions, 597 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-06 21:58:22,311 INFO L231 Difference]: Finished difference. Result has 58 places, 49 transitions, 216 flow [2023-11-06 21:58:22,311 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=455, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=216, PETRI_PLACES=58, PETRI_TRANSITIONS=49} [2023-11-06 21:58:22,312 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 16 predicate places. [2023-11-06 21:58:22,312 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 49 transitions, 216 flow [2023-11-06 21:58:22,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 205.66666666666666) internal successors, (1234), 6 states have internal predecessors, (1234), 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) [2023-11-06 21:58:22,313 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:58:22,313 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:58:22,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-06 21:58:22,314 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-06 21:58:22,314 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:58:22,314 INFO L85 PathProgramCache]: Analyzing trace with hash 1511089132, now seen corresponding path program 2 times [2023-11-06 21:58:22,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:58:22,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401626159] [2023-11-06 21:58:22,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:22,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:58:22,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:23,059 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 21:58:23,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:58:23,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401626159] [2023-11-06 21:58:23,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401626159] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:58:23,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:58:23,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 21:58:23,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15577884] [2023-11-06 21:58:23,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:58:23,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 21:58:23,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:58:23,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 21:58:23,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-06 21:58:23,210 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 455 [2023-11-06 21:58:23,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 49 transitions, 216 flow. Second operand has 6 states, 6 states have (on average 200.66666666666666) internal successors, (1204), 6 states have internal predecessors, (1204), 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) [2023-11-06 21:58:23,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:58:23,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 455 [2023-11-06 21:58:23,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:58:25,710 INFO L124 PetriNetUnfolderBase]: 8443/12397 cut-off events. [2023-11-06 21:58:25,710 INFO L125 PetriNetUnfolderBase]: For 11360/11864 co-relation queries the response was YES. [2023-11-06 21:58:25,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32847 conditions, 12397 events. 8443/12397 cut-off events. For 11360/11864 co-relation queries the response was YES. Maximal size of possible extension queue 637. Compared 77204 event pairs, 1522 based on Foata normal form. 668/12985 useless extension candidates. Maximal degree in co-relation 27277. Up to 3950 conditions per place. [2023-11-06 21:58:25,827 INFO L140 encePairwiseOnDemand]: 448/455 looper letters, 139 selfloop transitions, 12 changer transitions 5/160 dead transitions. [2023-11-06 21:58:25,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 160 transitions, 931 flow [2023-11-06 21:58:25,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 21:58:25,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-06 21:58:25,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1700 transitions. [2023-11-06 21:58:25,837 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46703296703296704 [2023-11-06 21:58:25,837 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1700 transitions. [2023-11-06 21:58:25,837 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1700 transitions. [2023-11-06 21:58:25,839 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:58:25,839 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1700 transitions. [2023-11-06 21:58:25,844 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 212.5) internal successors, (1700), 8 states have internal predecessors, (1700), 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) [2023-11-06 21:58:25,853 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 455.0) internal successors, (4095), 9 states have internal predecessors, (4095), 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) [2023-11-06 21:58:25,856 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 455.0) internal successors, (4095), 9 states have internal predecessors, (4095), 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) [2023-11-06 21:58:25,856 INFO L175 Difference]: Start difference. First operand has 58 places, 49 transitions, 216 flow. Second operand 8 states and 1700 transitions. [2023-11-06 21:58:25,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 160 transitions, 931 flow [2023-11-06 21:58:25,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 160 transitions, 923 flow, removed 4 selfloop flow, removed 0 redundant places. [2023-11-06 21:58:25,924 INFO L231 Difference]: Finished difference. Result has 70 places, 58 transitions, 321 flow [2023-11-06 21:58:25,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=455, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=321, PETRI_PLACES=70, PETRI_TRANSITIONS=58} [2023-11-06 21:58:25,925 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 28 predicate places. [2023-11-06 21:58:25,925 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 58 transitions, 321 flow [2023-11-06 21:58:25,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 200.66666666666666) internal successors, (1204), 6 states have internal predecessors, (1204), 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) [2023-11-06 21:58:25,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:58:25,927 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:58:25,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-06 21:58:25,927 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-06 21:58:25,928 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:58:25,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1155276904, now seen corresponding path program 3 times [2023-11-06 21:58:25,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:58:25,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615756693] [2023-11-06 21:58:25,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:25,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:58:26,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:26,525 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 21:58:26,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:58:26,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615756693] [2023-11-06 21:58:26,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615756693] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:58:26,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:58:26,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 21:58:26,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671892510] [2023-11-06 21:58:26,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:58:26,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 21:58:26,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:58:26,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 21:58:26,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-06 21:58:26,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 455 [2023-11-06 21:58:26,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 58 transitions, 321 flow. Second operand has 6 states, 6 states have (on average 201.66666666666666) internal successors, (1210), 6 states have internal predecessors, (1210), 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) [2023-11-06 21:58:26,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:58:26,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 455 [2023-11-06 21:58:26,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:58:29,565 INFO L124 PetriNetUnfolderBase]: 9515/14181 cut-off events. [2023-11-06 21:58:29,566 INFO L125 PetriNetUnfolderBase]: For 22354/22896 co-relation queries the response was YES. [2023-11-06 21:58:29,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43673 conditions, 14181 events. 9515/14181 cut-off events. For 22354/22896 co-relation queries the response was YES. Maximal size of possible extension queue 739. Compared 91945 event pairs, 2270 based on Foata normal form. 600/14741 useless extension candidates. Maximal degree in co-relation 38009. Up to 9111 conditions per place. [2023-11-06 21:58:29,746 INFO L140 encePairwiseOnDemand]: 448/455 looper letters, 94 selfloop transitions, 24 changer transitions 50/172 dead transitions. [2023-11-06 21:58:29,746 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 172 transitions, 1103 flow [2023-11-06 21:58:29,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 21:58:29,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-06 21:58:29,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1915 transitions. [2023-11-06 21:58:29,757 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46764346764346765 [2023-11-06 21:58:29,757 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1915 transitions. [2023-11-06 21:58:29,757 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1915 transitions. [2023-11-06 21:58:29,759 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:58:29,760 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1915 transitions. [2023-11-06 21:58:29,767 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 212.77777777777777) internal successors, (1915), 9 states have internal predecessors, (1915), 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) [2023-11-06 21:58:29,777 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 455.0) internal successors, (4550), 10 states have internal predecessors, (4550), 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) [2023-11-06 21:58:29,779 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 455.0) internal successors, (4550), 10 states have internal predecessors, (4550), 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) [2023-11-06 21:58:29,780 INFO L175 Difference]: Start difference. First operand has 70 places, 58 transitions, 321 flow. Second operand 9 states and 1915 transitions. [2023-11-06 21:58:29,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 172 transitions, 1103 flow [2023-11-06 21:58:30,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 172 transitions, 1080 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 21:58:30,079 INFO L231 Difference]: Finished difference. Result has 81 places, 75 transitions, 551 flow [2023-11-06 21:58:30,079 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=455, PETRI_DIFFERENCE_MINUEND_FLOW=309, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=551, PETRI_PLACES=81, PETRI_TRANSITIONS=75} [2023-11-06 21:58:30,081 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 39 predicate places. [2023-11-06 21:58:30,082 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 75 transitions, 551 flow [2023-11-06 21:58:30,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 201.66666666666666) internal successors, (1210), 6 states have internal predecessors, (1210), 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) [2023-11-06 21:58:30,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:58:30,083 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:58:30,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-06 21:58:30,084 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-06 21:58:30,085 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:58:30,085 INFO L85 PathProgramCache]: Analyzing trace with hash -1353843752, now seen corresponding path program 4 times [2023-11-06 21:58:30,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:58:30,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834306091] [2023-11-06 21:58:30,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:30,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:58:30,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:30,818 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 21:58:30,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:58:30,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834306091] [2023-11-06 21:58:30,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834306091] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:58:30,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:58:30,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-06 21:58:30,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132232612] [2023-11-06 21:58:30,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:58:30,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 21:58:30,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:58:30,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 21:58:30,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-06 21:58:30,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 455 [2023-11-06 21:58:30,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 75 transitions, 551 flow. Second operand has 7 states, 7 states have (on average 202.14285714285714) internal successors, (1415), 7 states have internal predecessors, (1415), 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) [2023-11-06 21:58:30,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:58:30,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 455 [2023-11-06 21:58:30,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:58:34,362 INFO L124 PetriNetUnfolderBase]: 12346/18892 cut-off events. [2023-11-06 21:58:34,362 INFO L125 PetriNetUnfolderBase]: For 44155/45069 co-relation queries the response was YES. [2023-11-06 21:58:34,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62576 conditions, 18892 events. 12346/18892 cut-off events. For 44155/45069 co-relation queries the response was YES. Maximal size of possible extension queue 1060. Compared 135207 event pairs, 1600 based on Foata normal form. 1178/19870 useless extension candidates. Maximal degree in co-relation 59414. Up to 7757 conditions per place. [2023-11-06 21:58:34,567 INFO L140 encePairwiseOnDemand]: 448/455 looper letters, 172 selfloop transitions, 41 changer transitions 12/235 dead transitions. [2023-11-06 21:58:34,567 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 235 transitions, 1818 flow [2023-11-06 21:58:34,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 21:58:34,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-06 21:58:34,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2137 transitions. [2023-11-06 21:58:34,577 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4696703296703297 [2023-11-06 21:58:34,577 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2137 transitions. [2023-11-06 21:58:34,577 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2137 transitions. [2023-11-06 21:58:34,579 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:58:34,579 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2137 transitions. [2023-11-06 21:58:34,586 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 213.7) internal successors, (2137), 10 states have internal predecessors, (2137), 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) [2023-11-06 21:58:34,596 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 455.0) internal successors, (5005), 11 states have internal predecessors, (5005), 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) [2023-11-06 21:58:34,599 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 455.0) internal successors, (5005), 11 states have internal predecessors, (5005), 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) [2023-11-06 21:58:34,599 INFO L175 Difference]: Start difference. First operand has 81 places, 75 transitions, 551 flow. Second operand 10 states and 2137 transitions. [2023-11-06 21:58:34,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 235 transitions, 1818 flow [2023-11-06 21:58:34,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 235 transitions, 1768 flow, removed 25 selfloop flow, removed 0 redundant places. [2023-11-06 21:58:34,994 INFO L231 Difference]: Finished difference. Result has 94 places, 105 transitions, 972 flow [2023-11-06 21:58:34,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=455, PETRI_DIFFERENCE_MINUEND_FLOW=519, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=972, PETRI_PLACES=94, PETRI_TRANSITIONS=105} [2023-11-06 21:58:34,997 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 52 predicate places. [2023-11-06 21:58:34,997 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 105 transitions, 972 flow [2023-11-06 21:58:34,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 202.14285714285714) internal successors, (1415), 7 states have internal predecessors, (1415), 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) [2023-11-06 21:58:34,999 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:58:34,999 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:58:34,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-06 21:58:35,000 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-06 21:58:35,004 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:58:35,004 INFO L85 PathProgramCache]: Analyzing trace with hash -1191171354, now seen corresponding path program 5 times [2023-11-06 21:58:35,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:58:35,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399882722] [2023-11-06 21:58:35,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:35,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:58:35,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:35,524 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 21:58:35,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:58:35,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399882722] [2023-11-06 21:58:35,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399882722] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:58:35,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:58:35,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 21:58:35,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989467043] [2023-11-06 21:58:35,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:58:35,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 21:58:35,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:58:35,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 21:58:35,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-06 21:58:35,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 455 [2023-11-06 21:58:35,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 105 transitions, 972 flow. Second operand has 6 states, 6 states have (on average 203.66666666666666) internal successors, (1222), 6 states have internal predecessors, (1222), 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) [2023-11-06 21:58:35,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:58:35,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 455 [2023-11-06 21:58:35,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:58:38,883 INFO L124 PetriNetUnfolderBase]: 12044/18296 cut-off events. [2023-11-06 21:58:38,883 INFO L125 PetriNetUnfolderBase]: For 57604/58458 co-relation queries the response was YES. [2023-11-06 21:58:38,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68820 conditions, 18296 events. 12044/18296 cut-off events. For 57604/58458 co-relation queries the response was YES. Maximal size of possible extension queue 991. Compared 127442 event pairs, 3431 based on Foata normal form. 720/18812 useless extension candidates. Maximal degree in co-relation 63579. Up to 13064 conditions per place. [2023-11-06 21:58:39,065 INFO L140 encePairwiseOnDemand]: 448/455 looper letters, 114 selfloop transitions, 32 changer transitions 17/173 dead transitions. [2023-11-06 21:58:39,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 173 transitions, 1559 flow [2023-11-06 21:58:39,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 21:58:39,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-06 21:58:39,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1498 transitions. [2023-11-06 21:58:39,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4703296703296703 [2023-11-06 21:58:39,074 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1498 transitions. [2023-11-06 21:58:39,074 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1498 transitions. [2023-11-06 21:58:39,076 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:58:39,076 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1498 transitions. [2023-11-06 21:58:39,090 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 214.0) internal successors, (1498), 7 states have internal predecessors, (1498), 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) [2023-11-06 21:58:39,106 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 455.0) internal successors, (3640), 8 states have internal predecessors, (3640), 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) [2023-11-06 21:58:39,108 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 455.0) internal successors, (3640), 8 states have internal predecessors, (3640), 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) [2023-11-06 21:58:39,108 INFO L175 Difference]: Start difference. First operand has 94 places, 105 transitions, 972 flow. Second operand 7 states and 1498 transitions. [2023-11-06 21:58:39,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 173 transitions, 1559 flow [2023-11-06 21:58:39,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 173 transitions, 1469 flow, removed 28 selfloop flow, removed 3 redundant places. [2023-11-06 21:58:39,491 INFO L231 Difference]: Finished difference. Result has 97 places, 108 transitions, 985 flow [2023-11-06 21:58:39,492 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=455, PETRI_DIFFERENCE_MINUEND_FLOW=841, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=985, PETRI_PLACES=97, PETRI_TRANSITIONS=108} [2023-11-06 21:58:39,493 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 55 predicate places. [2023-11-06 21:58:39,493 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 108 transitions, 985 flow [2023-11-06 21:58:39,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 203.66666666666666) internal successors, (1222), 6 states have internal predecessors, (1222), 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) [2023-11-06 21:58:39,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:58:39,494 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:58:39,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-06 21:58:39,494 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-06 21:58:39,495 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:58:39,495 INFO L85 PathProgramCache]: Analyzing trace with hash -1416350908, now seen corresponding path program 6 times [2023-11-06 21:58:39,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:58:39,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903407023] [2023-11-06 21:58:39,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:39,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:58:39,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:40,012 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 21:58:40,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:58:40,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903407023] [2023-11-06 21:58:40,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903407023] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:58:40,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:58:40,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-06 21:58:40,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148555094] [2023-11-06 21:58:40,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:58:40,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 21:58:40,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:58:40,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 21:58:40,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-06 21:58:40,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 455 [2023-11-06 21:58:40,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 108 transitions, 985 flow. Second operand has 7 states, 7 states have (on average 203.14285714285714) internal successors, (1422), 7 states have internal predecessors, (1422), 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) [2023-11-06 21:58:40,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:58:40,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 455 [2023-11-06 21:58:40,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:58:43,187 INFO L124 PetriNetUnfolderBase]: 10980/16504 cut-off events. [2023-11-06 21:58:43,187 INFO L125 PetriNetUnfolderBase]: For 49878/50570 co-relation queries the response was YES. [2023-11-06 21:58:43,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63090 conditions, 16504 events. 10980/16504 cut-off events. For 49878/50570 co-relation queries the response was YES. Maximal size of possible extension queue 892. Compared 111047 event pairs, 2971 based on Foata normal form. 802/17082 useless extension candidates. Maximal degree in co-relation 58353. Up to 11184 conditions per place. [2023-11-06 21:58:43,345 INFO L140 encePairwiseOnDemand]: 449/455 looper letters, 121 selfloop transitions, 48 changer transitions 0/179 dead transitions. [2023-11-06 21:58:43,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 179 transitions, 1640 flow [2023-11-06 21:58:43,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 21:58:43,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-06 21:58:43,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1703 transitions. [2023-11-06 21:58:43,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46785714285714286 [2023-11-06 21:58:43,368 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1703 transitions. [2023-11-06 21:58:43,369 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1703 transitions. [2023-11-06 21:58:43,372 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:58:43,372 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1703 transitions. [2023-11-06 21:58:43,380 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 212.875) internal successors, (1703), 8 states have internal predecessors, (1703), 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) [2023-11-06 21:58:43,388 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 455.0) internal successors, (4095), 9 states have internal predecessors, (4095), 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) [2023-11-06 21:58:43,389 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 455.0) internal successors, (4095), 9 states have internal predecessors, (4095), 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) [2023-11-06 21:58:43,389 INFO L175 Difference]: Start difference. First operand has 97 places, 108 transitions, 985 flow. Second operand 8 states and 1703 transitions. [2023-11-06 21:58:43,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 179 transitions, 1640 flow [2023-11-06 21:58:43,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 179 transitions, 1573 flow, removed 25 selfloop flow, removed 4 redundant places. [2023-11-06 21:58:43,883 INFO L231 Difference]: Finished difference. Result has 98 places, 112 transitions, 1071 flow [2023-11-06 21:58:43,883 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=455, PETRI_DIFFERENCE_MINUEND_FLOW=914, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1071, PETRI_PLACES=98, PETRI_TRANSITIONS=112} [2023-11-06 21:58:43,884 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 56 predicate places. [2023-11-06 21:58:43,884 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 112 transitions, 1071 flow [2023-11-06 21:58:43,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 203.14285714285714) internal successors, (1422), 7 states have internal predecessors, (1422), 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) [2023-11-06 21:58:43,884 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:58:43,885 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:58:43,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-06 21:58:43,885 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-06 21:58:43,886 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:58:43,886 INFO L85 PathProgramCache]: Analyzing trace with hash -483970432, now seen corresponding path program 7 times [2023-11-06 21:58:43,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:58:43,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120754825] [2023-11-06 21:58:43,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:43,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:58:43,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:44,527 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 21:58:44,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:58:44,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120754825] [2023-11-06 21:58:44,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120754825] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:58:44,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466574252] [2023-11-06 21:58:44,530 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 21:58:44,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:58:44,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c96627-6244-4ca5-b9f7-f007a9499268/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:58:44,534 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c96627-6244-4ca5-b9f7-f007a9499268/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:58:44,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c96627-6244-4ca5-b9f7-f007a9499268/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 21:58:44,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:44,735 INFO L262 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 21:58:44,743 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:58:45,278 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 21:58:45,279 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:58:45,551 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 21:58:45,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466574252] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:58:45,552 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:58:45,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 15 [2023-11-06 21:58:45,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579566873] [2023-11-06 21:58:45,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:58:45,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-06 21:58:45,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:58:45,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-06 21:58:45,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2023-11-06 21:58:45,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 455 [2023-11-06 21:58:45,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 112 transitions, 1071 flow. Second operand has 16 states, 16 states have (on average 202.0) internal successors, (3232), 16 states have internal predecessors, (3232), 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) [2023-11-06 21:58:45,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:58:45,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 455 [2023-11-06 21:58:45,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:58:49,451 INFO L124 PetriNetUnfolderBase]: 12401/18503 cut-off events. [2023-11-06 21:58:49,451 INFO L125 PetriNetUnfolderBase]: For 49909/50791 co-relation queries the response was YES. [2023-11-06 21:58:49,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70344 conditions, 18503 events. 12401/18503 cut-off events. For 49909/50791 co-relation queries the response was YES. Maximal size of possible extension queue 1005. Compared 126488 event pairs, 1290 based on Foata normal form. 988/19303 useless extension candidates. Maximal degree in co-relation 57958. Up to 8391 conditions per place. [2023-11-06 21:58:49,619 INFO L140 encePairwiseOnDemand]: 448/455 looper letters, 174 selfloop transitions, 75 changer transitions 3/262 dead transitions. [2023-11-06 21:58:49,619 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 262 transitions, 2243 flow [2023-11-06 21:58:49,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-06 21:58:49,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-06 21:58:49,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2751 transitions. [2023-11-06 21:58:49,630 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4650887573964497 [2023-11-06 21:58:49,631 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2751 transitions. [2023-11-06 21:58:49,631 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2751 transitions. [2023-11-06 21:58:49,633 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:58:49,634 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2751 transitions. [2023-11-06 21:58:49,641 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 211.6153846153846) internal successors, (2751), 13 states have internal predecessors, (2751), 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) [2023-11-06 21:58:49,652 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 455.0) internal successors, (6370), 14 states have internal predecessors, (6370), 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) [2023-11-06 21:58:49,654 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 455.0) internal successors, (6370), 14 states have internal predecessors, (6370), 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) [2023-11-06 21:58:49,654 INFO L175 Difference]: Start difference. First operand has 98 places, 112 transitions, 1071 flow. Second operand 13 states and 2751 transitions. [2023-11-06 21:58:49,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 262 transitions, 2243 flow [2023-11-06 21:58:50,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 262 transitions, 2099 flow, removed 16 selfloop flow, removed 6 redundant places. [2023-11-06 21:58:50,154 INFO L231 Difference]: Finished difference. Result has 110 places, 131 transitions, 1324 flow [2023-11-06 21:58:50,155 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=455, PETRI_DIFFERENCE_MINUEND_FLOW=933, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1324, PETRI_PLACES=110, PETRI_TRANSITIONS=131} [2023-11-06 21:58:50,155 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 68 predicate places. [2023-11-06 21:58:50,155 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 131 transitions, 1324 flow [2023-11-06 21:58:50,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 202.0) internal successors, (3232), 16 states have internal predecessors, (3232), 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) [2023-11-06 21:58:50,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:58:50,156 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:58:50,163 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c96627-6244-4ca5-b9f7-f007a9499268/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-06 21:58:50,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c96627-6244-4ca5-b9f7-f007a9499268/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-06 21:58:50,357 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-06 21:58:50,358 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:58:50,358 INFO L85 PathProgramCache]: Analyzing trace with hash 1742986060, now seen corresponding path program 8 times [2023-11-06 21:58:50,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:58:50,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108982948] [2023-11-06 21:58:50,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:50,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:58:50,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:50,806 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 21:58:50,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:58:50,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108982948] [2023-11-06 21:58:50,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108982948] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:58:50,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742752879] [2023-11-06 21:58:50,807 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 21:58:50,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:58:50,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c96627-6244-4ca5-b9f7-f007a9499268/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:58:50,809 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c96627-6244-4ca5-b9f7-f007a9499268/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:58:50,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c96627-6244-4ca5-b9f7-f007a9499268/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 21:58:51,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 21:58:51,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:58:51,003 INFO L262 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-06 21:58:51,007 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:58:51,247 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 21:58:51,247 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:58:51,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742752879] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:58:51,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 21:58:51,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2023-11-06 21:58:51,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139555208] [2023-11-06 21:58:51,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:58:51,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 21:58:51,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:58:51,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 21:58:51,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2023-11-06 21:58:51,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 455 [2023-11-06 21:58:51,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 131 transitions, 1324 flow. Second operand has 6 states, 6 states have (on average 204.66666666666666) internal successors, (1228), 6 states have internal predecessors, (1228), 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) [2023-11-06 21:58:51,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:58:51,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 455 [2023-11-06 21:58:51,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:58:56,089 INFO L124 PetriNetUnfolderBase]: 17607/25963 cut-off events. [2023-11-06 21:58:56,089 INFO L125 PetriNetUnfolderBase]: For 105364/105629 co-relation queries the response was YES. [2023-11-06 21:58:56,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107112 conditions, 25963 events. 17607/25963 cut-off events. For 105364/105629 co-relation queries the response was YES. Maximal size of possible extension queue 1396. Compared 180601 event pairs, 3268 based on Foata normal form. 385/26203 useless extension candidates. Maximal degree in co-relation 103085. Up to 7886 conditions per place. [2023-11-06 21:58:56,380 INFO L140 encePairwiseOnDemand]: 448/455 looper letters, 215 selfloop transitions, 111 changer transitions 7/340 dead transitions. [2023-11-06 21:58:56,380 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 340 transitions, 3517 flow [2023-11-06 21:58:56,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 21:58:56,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-06 21:58:56,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1955 transitions. [2023-11-06 21:58:56,388 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47741147741147744 [2023-11-06 21:58:56,389 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1955 transitions. [2023-11-06 21:58:56,389 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1955 transitions. [2023-11-06 21:58:56,391 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:58:56,391 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1955 transitions. [2023-11-06 21:58:56,397 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 217.22222222222223) internal successors, (1955), 9 states have internal predecessors, (1955), 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) [2023-11-06 21:58:56,405 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 455.0) internal successors, (4550), 10 states have internal predecessors, (4550), 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) [2023-11-06 21:58:56,407 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 455.0) internal successors, (4550), 10 states have internal predecessors, (4550), 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) [2023-11-06 21:58:56,407 INFO L175 Difference]: Start difference. First operand has 110 places, 131 transitions, 1324 flow. Second operand 9 states and 1955 transitions. [2023-11-06 21:58:56,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 340 transitions, 3517 flow [2023-11-06 21:58:57,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 340 transitions, 3320 flow, removed 80 selfloop flow, removed 3 redundant places. [2023-11-06 21:58:57,596 INFO L231 Difference]: Finished difference. Result has 121 places, 183 transitions, 2273 flow [2023-11-06 21:58:57,596 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=455, PETRI_DIFFERENCE_MINUEND_FLOW=1193, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2273, PETRI_PLACES=121, PETRI_TRANSITIONS=183} [2023-11-06 21:58:57,597 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 79 predicate places. [2023-11-06 21:58:57,597 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 183 transitions, 2273 flow [2023-11-06 21:58:57,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 204.66666666666666) internal successors, (1228), 6 states have internal predecessors, (1228), 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) [2023-11-06 21:58:57,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:58:57,598 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:58:57,608 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c96627-6244-4ca5-b9f7-f007a9499268/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 21:58:57,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c96627-6244-4ca5-b9f7-f007a9499268/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-06 21:58:57,805 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-06 21:58:57,806 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:58:57,806 INFO L85 PathProgramCache]: Analyzing trace with hash 45914960, now seen corresponding path program 9 times [2023-11-06 21:58:57,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:58:57,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090481149] [2023-11-06 21:58:57,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:57,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:58:57,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:58,518 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 21:58:58,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:58:58,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090481149] [2023-11-06 21:58:58,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090481149] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:58:58,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:58:58,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 21:58:58,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493997192] [2023-11-06 21:58:58,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:58:58,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 21:58:58,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:58:58,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 21:58:58,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-06 21:58:58,595 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 455 [2023-11-06 21:58:58,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 183 transitions, 2273 flow. Second operand has 6 states, 6 states have (on average 204.66666666666666) internal successors, (1228), 6 states have internal predecessors, (1228), 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) [2023-11-06 21:58:58,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:58:58,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 455 [2023-11-06 21:58:58,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:59:02,064 INFO L124 PetriNetUnfolderBase]: 12843/19235 cut-off events. [2023-11-06 21:59:02,064 INFO L125 PetriNetUnfolderBase]: For 101886/102602 co-relation queries the response was YES. [2023-11-06 21:59:02,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86178 conditions, 19235 events. 12843/19235 cut-off events. For 101886/102602 co-relation queries the response was YES. Maximal size of possible extension queue 1033. Compared 131279 event pairs, 2716 based on Foata normal form. 458/19493 useless extension candidates. Maximal degree in co-relation 74139. Up to 12595 conditions per place. [2023-11-06 21:59:02,286 INFO L140 encePairwiseOnDemand]: 449/455 looper letters, 100 selfloop transitions, 100 changer transitions 2/215 dead transitions. [2023-11-06 21:59:02,286 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 215 transitions, 2820 flow [2023-11-06 21:59:02,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 21:59:02,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 21:59:02,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1276 transitions. [2023-11-06 21:59:02,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4673992673992674 [2023-11-06 21:59:02,294 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1276 transitions. [2023-11-06 21:59:02,294 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1276 transitions. [2023-11-06 21:59:02,296 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:59:02,296 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1276 transitions. [2023-11-06 21:59:02,301 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 212.66666666666666) internal successors, (1276), 6 states have internal predecessors, (1276), 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) [2023-11-06 21:59:02,307 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 455.0) internal successors, (3185), 7 states have internal predecessors, (3185), 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) [2023-11-06 21:59:02,309 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 455.0) internal successors, (3185), 7 states have internal predecessors, (3185), 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) [2023-11-06 21:59:02,309 INFO L175 Difference]: Start difference. First operand has 121 places, 183 transitions, 2273 flow. Second operand 6 states and 1276 transitions. [2023-11-06 21:59:02,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 215 transitions, 2820 flow [2023-11-06 21:59:03,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 215 transitions, 2714 flow, removed 48 selfloop flow, removed 3 redundant places. [2023-11-06 21:59:03,670 INFO L231 Difference]: Finished difference. Result has 123 places, 177 transitions, 2352 flow [2023-11-06 21:59:03,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=455, PETRI_DIFFERENCE_MINUEND_FLOW=2139, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2352, PETRI_PLACES=123, PETRI_TRANSITIONS=177} [2023-11-06 21:59:03,672 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 81 predicate places. [2023-11-06 21:59:03,672 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 177 transitions, 2352 flow [2023-11-06 21:59:03,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 204.66666666666666) internal successors, (1228), 6 states have internal predecessors, (1228), 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) [2023-11-06 21:59:03,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:59:03,673 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:59:03,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-06 21:59:03,673 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-06 21:59:03,674 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:59:03,674 INFO L85 PathProgramCache]: Analyzing trace with hash -510954145, now seen corresponding path program 1 times [2023-11-06 21:59:03,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:59:03,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172988377] [2023-11-06 21:59:03,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:59:03,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:59:03,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:59:04,277 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 21:59:04,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:59:04,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172988377] [2023-11-06 21:59:04,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172988377] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:59:04,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:59:04,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 21:59:04,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133301435] [2023-11-06 21:59:04,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:59:04,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 21:59:04,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:59:04,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 21:59:04,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-06 21:59:04,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 455 [2023-11-06 21:59:04,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 177 transitions, 2352 flow. Second operand has 6 states, 6 states have (on average 204.66666666666666) internal successors, (1228), 6 states have internal predecessors, (1228), 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) [2023-11-06 21:59:04,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:59:04,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 455 [2023-11-06 21:59:04,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:59:08,115 INFO L124 PetriNetUnfolderBase]: 14376/20982 cut-off events. [2023-11-06 21:59:08,115 INFO L125 PetriNetUnfolderBase]: For 116844/117954 co-relation queries the response was YES. [2023-11-06 21:59:08,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93065 conditions, 20982 events. 14376/20982 cut-off events. For 116844/117954 co-relation queries the response was YES. Maximal size of possible extension queue 957. Compared 132057 event pairs, 4046 based on Foata normal form. 484/21191 useless extension candidates. Maximal degree in co-relation 93006. Up to 19381 conditions per place. [2023-11-06 21:59:08,343 INFO L140 encePairwiseOnDemand]: 449/455 looper letters, 153 selfloop transitions, 48 changer transitions 21/239 dead transitions. [2023-11-06 21:59:08,343 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 239 transitions, 3524 flow [2023-11-06 21:59:08,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 21:59:08,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-06 21:59:08,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1470 transitions. [2023-11-06 21:59:08,350 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46153846153846156 [2023-11-06 21:59:08,350 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1470 transitions. [2023-11-06 21:59:08,350 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1470 transitions. [2023-11-06 21:59:08,352 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:59:08,352 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1470 transitions. [2023-11-06 21:59:08,356 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 210.0) internal successors, (1470), 7 states have internal predecessors, (1470), 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) [2023-11-06 21:59:08,363 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 455.0) internal successors, (3640), 8 states have internal predecessors, (3640), 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) [2023-11-06 21:59:08,364 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 455.0) internal successors, (3640), 8 states have internal predecessors, (3640), 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) [2023-11-06 21:59:08,365 INFO L175 Difference]: Start difference. First operand has 123 places, 177 transitions, 2352 flow. Second operand 7 states and 1470 transitions. [2023-11-06 21:59:08,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 239 transitions, 3524 flow [2023-11-06 21:59:09,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 239 transitions, 3078 flow, removed 112 selfloop flow, removed 5 redundant places. [2023-11-06 21:59:09,575 INFO L231 Difference]: Finished difference. Result has 125 places, 198 transitions, 2566 flow [2023-11-06 21:59:09,575 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=455, PETRI_DIFFERENCE_MINUEND_FLOW=1986, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2566, PETRI_PLACES=125, PETRI_TRANSITIONS=198} [2023-11-06 21:59:09,576 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 83 predicate places. [2023-11-06 21:59:09,576 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 198 transitions, 2566 flow [2023-11-06 21:59:09,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 204.66666666666666) internal successors, (1228), 6 states have internal predecessors, (1228), 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) [2023-11-06 21:59:09,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:59:09,577 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:59:09,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-06 21:59:09,577 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-06 21:59:09,578 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:59:09,578 INFO L85 PathProgramCache]: Analyzing trace with hash 933948051, now seen corresponding path program 2 times [2023-11-06 21:59:09,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:59:09,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735222571] [2023-11-06 21:59:09,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:59:09,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:59:09,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:59:10,069 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 21:59:10,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:59:10,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735222571] [2023-11-06 21:59:10,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735222571] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:59:10,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:59:10,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 21:59:10,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856202400] [2023-11-06 21:59:10,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:59:10,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 21:59:10,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:59:10,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 21:59:10,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-06 21:59:10,174 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 455 [2023-11-06 21:59:10,175 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 198 transitions, 2566 flow. Second operand has 6 states, 6 states have (on average 200.66666666666666) internal successors, (1204), 6 states have internal predecessors, (1204), 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) [2023-11-06 21:59:10,176 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:59:10,176 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 455 [2023-11-06 21:59:10,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:59:14,739 INFO L124 PetriNetUnfolderBase]: 15588/22975 cut-off events. [2023-11-06 21:59:14,739 INFO L125 PetriNetUnfolderBase]: For 125534/126724 co-relation queries the response was YES. [2023-11-06 21:59:14,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102868 conditions, 22975 events. 15588/22975 cut-off events. For 125534/126724 co-relation queries the response was YES. Maximal size of possible extension queue 1113. Compared 149805 event pairs, 6576 based on Foata normal form. 764/23418 useless extension candidates. Maximal degree in co-relation 102807. Up to 20007 conditions per place. [2023-11-06 21:59:14,976 INFO L140 encePairwiseOnDemand]: 449/455 looper letters, 172 selfloop transitions, 93 changer transitions 24/306 dead transitions. [2023-11-06 21:59:14,976 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 306 transitions, 4589 flow [2023-11-06 21:59:14,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 21:59:14,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-06 21:59:14,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1446 transitions. [2023-11-06 21:59:14,981 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45400313971742545 [2023-11-06 21:59:14,981 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1446 transitions. [2023-11-06 21:59:14,981 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1446 transitions. [2023-11-06 21:59:14,983 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:59:14,983 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1446 transitions. [2023-11-06 21:59:14,986 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 206.57142857142858) internal successors, (1446), 7 states have internal predecessors, (1446), 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) [2023-11-06 21:59:14,992 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 455.0) internal successors, (3640), 8 states have internal predecessors, (3640), 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) [2023-11-06 21:59:14,993 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 455.0) internal successors, (3640), 8 states have internal predecessors, (3640), 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) [2023-11-06 21:59:14,994 INFO L175 Difference]: Start difference. First operand has 125 places, 198 transitions, 2566 flow. Second operand 7 states and 1446 transitions. [2023-11-06 21:59:14,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 306 transitions, 4589 flow [2023-11-06 21:59:15,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 306 transitions, 4390 flow, removed 42 selfloop flow, removed 3 redundant places. [2023-11-06 21:59:15,674 INFO L231 Difference]: Finished difference. Result has 130 places, 246 transitions, 3701 flow [2023-11-06 21:59:15,675 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=455, PETRI_DIFFERENCE_MINUEND_FLOW=2431, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3701, PETRI_PLACES=130, PETRI_TRANSITIONS=246} [2023-11-06 21:59:15,676 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 88 predicate places. [2023-11-06 21:59:15,676 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 246 transitions, 3701 flow [2023-11-06 21:59:15,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 200.66666666666666) internal successors, (1204), 6 states have internal predecessors, (1204), 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) [2023-11-06 21:59:15,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:59:15,677 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:59:15,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-06 21:59:15,677 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-06 21:59:15,678 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:59:15,678 INFO L85 PathProgramCache]: Analyzing trace with hash -695825033, now seen corresponding path program 3 times [2023-11-06 21:59:15,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:59:15,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994059253] [2023-11-06 21:59:15,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:59:15,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:59:15,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:59:16,335 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 21:59:16,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:59:16,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994059253] [2023-11-06 21:59:16,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994059253] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:59:16,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131318049] [2023-11-06 21:59:16,336 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 21:59:16,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:59:16,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c96627-6244-4ca5-b9f7-f007a9499268/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:59:16,338 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c96627-6244-4ca5-b9f7-f007a9499268/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:59:16,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c96627-6244-4ca5-b9f7-f007a9499268/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 21:59:16,545 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 21:59:16,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:59:16,548 INFO L262 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 21:59:16,551 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:59:16,833 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 21:59:16,833 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:59:17,044 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 21:59:17,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131318049] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 21:59:17,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-06 21:59:17,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 13 [2023-11-06 21:59:17,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809873977] [2023-11-06 21:59:17,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:59:17,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 21:59:17,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:59:17,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 21:59:17,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2023-11-06 21:59:17,144 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 455 [2023-11-06 21:59:17,145 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 246 transitions, 3701 flow. Second operand has 6 states, 6 states have (on average 202.66666666666666) internal successors, (1216), 6 states have internal predecessors, (1216), 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) [2023-11-06 21:59:17,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:59:17,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 455 [2023-11-06 21:59:17,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:59:23,769 INFO L124 PetriNetUnfolderBase]: 18632/27733 cut-off events. [2023-11-06 21:59:23,769 INFO L125 PetriNetUnfolderBase]: For 158771/159947 co-relation queries the response was YES. [2023-11-06 21:59:23,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127959 conditions, 27733 events. 18632/27733 cut-off events. For 158771/159947 co-relation queries the response was YES. Maximal size of possible extension queue 1375. Compared 190943 event pairs, 3570 based on Foata normal form. 1526/29053 useless extension candidates. Maximal degree in co-relation 127895. Up to 7859 conditions per place. [2023-11-06 21:59:24,113 INFO L140 encePairwiseOnDemand]: 446/455 looper letters, 318 selfloop transitions, 108 changer transitions 12/455 dead transitions. [2023-11-06 21:59:24,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 455 transitions, 6465 flow [2023-11-06 21:59:24,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 21:59:24,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-06 21:59:24,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1923 transitions. [2023-11-06 21:59:24,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4695970695970696 [2023-11-06 21:59:24,121 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1923 transitions. [2023-11-06 21:59:24,121 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1923 transitions. [2023-11-06 21:59:24,123 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:59:24,124 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1923 transitions. [2023-11-06 21:59:24,130 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 213.66666666666666) internal successors, (1923), 9 states have internal predecessors, (1923), 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) [2023-11-06 21:59:24,139 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 455.0) internal successors, (4550), 10 states have internal predecessors, (4550), 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) [2023-11-06 21:59:24,141 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 455.0) internal successors, (4550), 10 states have internal predecessors, (4550), 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) [2023-11-06 21:59:24,141 INFO L175 Difference]: Start difference. First operand has 130 places, 246 transitions, 3701 flow. Second operand 9 states and 1923 transitions. [2023-11-06 21:59:24,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 455 transitions, 6465 flow