./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/mult-flipped-dist.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_ed733aae-4d5c-424b-8d82-99a8b3bc25b3/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed733aae-4d5c-424b-8d82-99a8b3bc25b3/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_ed733aae-4d5c-424b-8d82-99a8b3bc25b3/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed733aae-4d5c-424b-8d82-99a8b3bc25b3/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/mult-flipped-dist.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed733aae-4d5c-424b-8d82-99a8b3bc25b3/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_ed733aae-4d5c-424b-8d82-99a8b3bc25b3/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 0d10bf8c0e842192a13f4b6638f03cf57668d5bee07d0b49c4b595de1c605066 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:18:18,597 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:18:18,714 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed733aae-4d5c-424b-8d82-99a8b3bc25b3/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 22:18:18,719 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:18:18,720 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:18:18,744 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:18:18,745 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:18:18,746 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:18:18,747 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:18:18,747 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:18:18,748 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:18:18,749 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:18:18,749 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:18:18,750 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:18:18,750 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 22:18:18,751 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:18:18,752 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:18:18,752 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:18:18,760 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:18:18,760 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 22:18:18,761 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:18:18,761 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 22:18:18,762 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:18:18,762 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 22:18:18,763 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:18:18,763 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:18:18,764 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:18:18,764 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:18:18,764 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:18:18,765 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:18:18,765 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:18:18,766 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 22:18:18,766 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:18:18,766 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:18:18,767 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:18:18,767 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 22:18:18,767 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:18:18,767 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:18:18,768 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:18:18,768 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_ed733aae-4d5c-424b-8d82-99a8b3bc25b3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed733aae-4d5c-424b-8d82-99a8b3bc25b3/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0d10bf8c0e842192a13f4b6638f03cf57668d5bee07d0b49c4b595de1c605066 [2023-11-06 22:18:19,057 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:18:19,085 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:18:19,087 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:18:19,089 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:18:19,090 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:18:19,091 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed733aae-4d5c-424b-8d82-99a8b3bc25b3/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/weaver/mult-flipped-dist.wvr.c [2023-11-06 22:18:22,199 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:18:22,424 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:18:22,425 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed733aae-4d5c-424b-8d82-99a8b3bc25b3/sv-benchmarks/c/weaver/mult-flipped-dist.wvr.c [2023-11-06 22:18:22,433 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed733aae-4d5c-424b-8d82-99a8b3bc25b3/bin/uautomizer-verify-WvqO1wxjHP/data/02b3ab471/58e7966cca0346ec854af5ae4cb68059/FLAGa00eb6807 [2023-11-06 22:18:22,448 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed733aae-4d5c-424b-8d82-99a8b3bc25b3/bin/uautomizer-verify-WvqO1wxjHP/data/02b3ab471/58e7966cca0346ec854af5ae4cb68059 [2023-11-06 22:18:22,451 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:18:22,453 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:18:22,454 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:18:22,455 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:18:22,460 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:18:22,461 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:18:22" (1/1) ... [2023-11-06 22:18:22,462 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f182d28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:18:22, skipping insertion in model container [2023-11-06 22:18:22,462 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:18:22" (1/1) ... [2023-11-06 22:18:22,488 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:18:22,733 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_ed733aae-4d5c-424b-8d82-99a8b3bc25b3/sv-benchmarks/c/weaver/mult-flipped-dist.wvr.c[2135,2148] [2023-11-06 22:18:22,749 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:18:22,763 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:18:22,800 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_ed733aae-4d5c-424b-8d82-99a8b3bc25b3/sv-benchmarks/c/weaver/mult-flipped-dist.wvr.c[2135,2148] [2023-11-06 22:18:22,811 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:18:22,829 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:18:22,830 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:18:22 WrapperNode [2023-11-06 22:18:22,830 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:18:22,831 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:18:22,832 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:18:22,832 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:18:22,839 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:18:22" (1/1) ... [2023-11-06 22:18:22,858 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:18:22" (1/1) ... [2023-11-06 22:18:22,887 INFO L138 Inliner]: procedures = 22, calls = 25, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 72 [2023-11-06 22:18:22,888 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:18:22,889 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:18:22,889 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:18:22,889 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:18:22,899 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:18:22" (1/1) ... [2023-11-06 22:18:22,900 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:18:22" (1/1) ... [2023-11-06 22:18:22,905 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:18:22" (1/1) ... [2023-11-06 22:18:22,906 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:18:22" (1/1) ... [2023-11-06 22:18:22,921 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:18:22" (1/1) ... [2023-11-06 22:18:22,929 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:18:22" (1/1) ... [2023-11-06 22:18:22,933 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:18:22" (1/1) ... [2023-11-06 22:18:22,939 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:18:22" (1/1) ... [2023-11-06 22:18:22,942 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:18:22,948 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:18:22,948 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:18:22,948 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:18:22,949 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:18:22" (1/1) ... [2023-11-06 22:18:22,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:18:22,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed733aae-4d5c-424b-8d82-99a8b3bc25b3/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:18:22,985 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed733aae-4d5c-424b-8d82-99a8b3bc25b3/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:18:23,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed733aae-4d5c-424b-8d82-99a8b3bc25b3/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:18:23,039 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:18:23,039 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-06 22:18:23,040 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-06 22:18:23,040 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-06 22:18:23,040 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-06 22:18:23,040 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-06 22:18:23,040 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-06 22:18:23,041 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:18:23,041 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 22:18:23,041 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 22:18:23,041 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:18:23,041 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:18:23,041 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 22:18:23,043 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 22:18:23,045 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 22:18:23,184 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:18:23,187 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:18:23,414 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:18:23,425 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:18:23,426 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-06 22:18:23,428 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:18:23 BoogieIcfgContainer [2023-11-06 22:18:23,428 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:18:23,431 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:18:23,431 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:18:23,438 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:18:23,439 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:18:22" (1/3) ... [2023-11-06 22:18:23,440 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b77e9c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:18:23, skipping insertion in model container [2023-11-06 22:18:23,441 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:18:22" (2/3) ... [2023-11-06 22:18:23,441 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b77e9c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:18:23, skipping insertion in model container [2023-11-06 22:18:23,441 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:18:23" (3/3) ... [2023-11-06 22:18:23,443 INFO L112 eAbstractionObserver]: Analyzing ICFG mult-flipped-dist.wvr.c [2023-11-06 22:18:23,452 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-06 22:18:23,465 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:18:23,465 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 22:18:23,468 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 22:18:23,576 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-06 22:18:23,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 112 places, 109 transitions, 239 flow [2023-11-06 22:18:23,734 INFO L124 PetriNetUnfolderBase]: 7/106 cut-off events. [2023-11-06 22:18:23,734 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-06 22:18:23,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119 conditions, 106 events. 7/106 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 81 event pairs, 0 based on Foata normal form. 0/98 useless extension candidates. Maximal degree in co-relation 67. Up to 2 conditions per place. [2023-11-06 22:18:23,740 INFO L82 GeneralOperation]: Start removeDead. Operand has 112 places, 109 transitions, 239 flow [2023-11-06 22:18:23,745 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 98 places, 95 transitions, 208 flow [2023-11-06 22:18:23,749 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:18:23,759 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 98 places, 95 transitions, 208 flow [2023-11-06 22:18:23,762 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 98 places, 95 transitions, 208 flow [2023-11-06 22:18:23,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 98 places, 95 transitions, 208 flow [2023-11-06 22:18:23,798 INFO L124 PetriNetUnfolderBase]: 7/95 cut-off events. [2023-11-06 22:18:23,799 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-06 22:18:23,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108 conditions, 95 events. 7/95 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 78 event pairs, 0 based on Foata normal form. 0/88 useless extension candidates. Maximal degree in co-relation 67. Up to 2 conditions per place. [2023-11-06 22:18:23,802 INFO L119 LiptonReduction]: Number of co-enabled transitions 1518 [2023-11-06 22:18:26,663 INFO L134 LiptonReduction]: Checked pairs total: 1429 [2023-11-06 22:18:26,663 INFO L136 LiptonReduction]: Total number of compositions: 79 [2023-11-06 22:18:26,678 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:18:26,686 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;@4107880b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:18:26,686 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-06 22:18:26,693 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:18:26,693 INFO L124 PetriNetUnfolderBase]: 3/21 cut-off events. [2023-11-06 22:18:26,693 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-06 22:18:26,694 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:18:26,694 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:18:26,695 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 1 more)] === [2023-11-06 22:18:26,700 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:18:26,700 INFO L85 PathProgramCache]: Analyzing trace with hash -2032481656, now seen corresponding path program 1 times [2023-11-06 22:18:26,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:18:26,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793919127] [2023-11-06 22:18:26,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:26,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:18:26,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:27,667 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 22:18:27,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:18:27,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793919127] [2023-11-06 22:18:27,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793919127] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:18:27,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:18:27,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:18:27,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942485076] [2023-11-06 22:18:27,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:18:27,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:18:27,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:18:27,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:18:27,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:18:27,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 188 [2023-11-06 22:18:27,757 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 22 transitions, 62 flow. Second operand has 3 states, 3 states have (on average 100.33333333333333) internal successors, (301), 3 states have internal predecessors, (301), 0 states have call successors, (0), 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 22:18:27,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:18:27,757 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 188 [2023-11-06 22:18:27,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:18:27,952 INFO L124 PetriNetUnfolderBase]: 359/506 cut-off events. [2023-11-06 22:18:27,952 INFO L125 PetriNetUnfolderBase]: For 42/42 co-relation queries the response was YES. [2023-11-06 22:18:27,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1064 conditions, 506 events. 359/506 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1613 event pairs, 39 based on Foata normal form. 1/306 useless extension candidates. Maximal degree in co-relation 803. Up to 421 conditions per place. [2023-11-06 22:18:27,964 INFO L140 encePairwiseOnDemand]: 183/188 looper letters, 30 selfloop transitions, 4 changer transitions 1/38 dead transitions. [2023-11-06 22:18:27,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 38 transitions, 179 flow [2023-11-06 22:18:27,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:18:27,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:18:27,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 321 transitions. [2023-11-06 22:18:27,990 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5691489361702128 [2023-11-06 22:18:27,991 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 321 transitions. [2023-11-06 22:18:27,992 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 321 transitions. [2023-11-06 22:18:27,996 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:18:27,999 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 321 transitions. [2023-11-06 22:18:28,006 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 107.0) internal successors, (321), 3 states have internal predecessors, (321), 0 states have call successors, (0), 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 22:18:28,012 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 188.0) internal successors, (752), 4 states have internal predecessors, (752), 0 states have call successors, (0), 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 22:18:28,013 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 188.0) internal successors, (752), 4 states have internal predecessors, (752), 0 states have call successors, (0), 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 22:18:28,015 INFO L175 Difference]: Start difference. First operand has 29 places, 22 transitions, 62 flow. Second operand 3 states and 321 transitions. [2023-11-06 22:18:28,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 38 transitions, 179 flow [2023-11-06 22:18:28,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 38 transitions, 157 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-06 22:18:28,022 INFO L231 Difference]: Finished difference. Result has 26 places, 25 transitions, 76 flow [2023-11-06 22:18:28,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=76, PETRI_PLACES=26, PETRI_TRANSITIONS=25} [2023-11-06 22:18:28,030 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -3 predicate places. [2023-11-06 22:18:28,030 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 25 transitions, 76 flow [2023-11-06 22:18:28,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 100.33333333333333) internal successors, (301), 3 states have internal predecessors, (301), 0 states have call successors, (0), 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 22:18:28,031 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:18:28,031 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] [2023-11-06 22:18:28,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 22:18:28,032 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 1 more)] === [2023-11-06 22:18:28,033 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:18:28,034 INFO L85 PathProgramCache]: Analyzing trace with hash 1794567102, now seen corresponding path program 1 times [2023-11-06 22:18:28,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:18:28,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882392783] [2023-11-06 22:18:28,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:28,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:18:28,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:28,301 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 22:18:28,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:18:28,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882392783] [2023-11-06 22:18:28,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882392783] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:18:28,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:18:28,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 22:18:28,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805901069] [2023-11-06 22:18:28,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:18:28,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:18:28,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:18:28,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:18:28,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:18:28,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 188 [2023-11-06 22:18:28,388 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 25 transitions, 76 flow. Second operand has 5 states, 5 states have (on average 89.8) internal successors, (449), 5 states have internal predecessors, (449), 0 states have call successors, (0), 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 22:18:28,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:18:28,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 188 [2023-11-06 22:18:28,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:18:28,674 INFO L124 PetriNetUnfolderBase]: 478/727 cut-off events. [2023-11-06 22:18:28,674 INFO L125 PetriNetUnfolderBase]: For 176/176 co-relation queries the response was YES. [2023-11-06 22:18:28,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1729 conditions, 727 events. 478/727 cut-off events. For 176/176 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 2878 event pairs, 137 based on Foata normal form. 56/761 useless extension candidates. Maximal degree in co-relation 381. Up to 391 conditions per place. [2023-11-06 22:18:28,683 INFO L140 encePairwiseOnDemand]: 181/188 looper letters, 47 selfloop transitions, 6 changer transitions 2/56 dead transitions. [2023-11-06 22:18:28,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 56 transitions, 269 flow [2023-11-06 22:18:28,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:18:28,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:18:28,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 484 transitions. [2023-11-06 22:18:28,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5148936170212766 [2023-11-06 22:18:28,689 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 484 transitions. [2023-11-06 22:18:28,689 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 484 transitions. [2023-11-06 22:18:28,690 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:18:28,690 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 484 transitions. [2023-11-06 22:18:28,692 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 96.8) internal successors, (484), 5 states have internal predecessors, (484), 0 states have call successors, (0), 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 22:18:28,697 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 188.0) internal successors, (1128), 6 states have internal predecessors, (1128), 0 states have call successors, (0), 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 22:18:28,699 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 188.0) internal successors, (1128), 6 states have internal predecessors, (1128), 0 states have call successors, (0), 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 22:18:28,702 INFO L175 Difference]: Start difference. First operand has 26 places, 25 transitions, 76 flow. Second operand 5 states and 484 transitions. [2023-11-06 22:18:28,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 56 transitions, 269 flow [2023-11-06 22:18:28,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 56 transitions, 263 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:18:28,707 INFO L231 Difference]: Finished difference. Result has 32 places, 29 transitions, 127 flow [2023-11-06 22:18:28,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=127, PETRI_PLACES=32, PETRI_TRANSITIONS=29} [2023-11-06 22:18:28,708 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 3 predicate places. [2023-11-06 22:18:28,709 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 29 transitions, 127 flow [2023-11-06 22:18:28,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 89.8) internal successors, (449), 5 states have internal predecessors, (449), 0 states have call successors, (0), 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 22:18:28,711 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:18:28,718 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] [2023-11-06 22:18:28,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 22:18:28,718 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 1 more)] === [2023-11-06 22:18:28,722 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:18:28,722 INFO L85 PathProgramCache]: Analyzing trace with hash -1402378076, now seen corresponding path program 2 times [2023-11-06 22:18:28,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:18:28,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658119808] [2023-11-06 22:18:28,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:28,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:18:28,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:28,895 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 22:18:28,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:18:28,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658119808] [2023-11-06 22:18:28,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658119808] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:18:28,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:18:28,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 22:18:28,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311737367] [2023-11-06 22:18:28,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:18:28,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:18:28,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:18:28,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:18:28,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:18:28,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 188 [2023-11-06 22:18:28,939 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 29 transitions, 127 flow. Second operand has 4 states, 4 states have (on average 93.5) internal successors, (374), 4 states have internal predecessors, (374), 0 states have call successors, (0), 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 22:18:28,939 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:18:28,939 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 188 [2023-11-06 22:18:28,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:18:29,154 INFO L124 PetriNetUnfolderBase]: 456/690 cut-off events. [2023-11-06 22:18:29,155 INFO L125 PetriNetUnfolderBase]: For 950/1080 co-relation queries the response was YES. [2023-11-06 22:18:29,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2301 conditions, 690 events. 456/690 cut-off events. For 950/1080 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 2707 event pairs, 80 based on Foata normal form. 134/803 useless extension candidates. Maximal degree in co-relation 629. Up to 440 conditions per place. [2023-11-06 22:18:29,163 INFO L140 encePairwiseOnDemand]: 183/188 looper letters, 42 selfloop transitions, 5 changer transitions 6/56 dead transitions. [2023-11-06 22:18:29,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 56 transitions, 333 flow [2023-11-06 22:18:29,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:18:29,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 22:18:29,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 404 transitions. [2023-11-06 22:18:29,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5372340425531915 [2023-11-06 22:18:29,166 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 404 transitions. [2023-11-06 22:18:29,166 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 404 transitions. [2023-11-06 22:18:29,166 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:18:29,167 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 404 transitions. [2023-11-06 22:18:29,168 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 101.0) internal successors, (404), 4 states have internal predecessors, (404), 0 states have call successors, (0), 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 22:18:29,171 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 188.0) internal successors, (940), 5 states have internal predecessors, (940), 0 states have call successors, (0), 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 22:18:29,171 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 188.0) internal successors, (940), 5 states have internal predecessors, (940), 0 states have call successors, (0), 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 22:18:29,172 INFO L175 Difference]: Start difference. First operand has 32 places, 29 transitions, 127 flow. Second operand 4 states and 404 transitions. [2023-11-06 22:18:29,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 56 transitions, 333 flow [2023-11-06 22:18:29,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 56 transitions, 323 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-11-06 22:18:29,177 INFO L231 Difference]: Finished difference. Result has 36 places, 31 transitions, 153 flow [2023-11-06 22:18:29,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=153, PETRI_PLACES=36, PETRI_TRANSITIONS=31} [2023-11-06 22:18:29,179 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 7 predicate places. [2023-11-06 22:18:29,183 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 31 transitions, 153 flow [2023-11-06 22:18:29,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 93.5) internal successors, (374), 4 states have internal predecessors, (374), 0 states have call successors, (0), 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 22:18:29,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:18:29,184 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] [2023-11-06 22:18:29,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 22:18:29,185 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 1 more)] === [2023-11-06 22:18:29,185 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:18:29,185 INFO L85 PathProgramCache]: Analyzing trace with hash 284497090, now seen corresponding path program 1 times [2023-11-06 22:18:29,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:18:29,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932419192] [2023-11-06 22:18:29,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:29,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:18:29,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:29,367 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 22:18:29,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:18:29,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932419192] [2023-11-06 22:18:29,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932419192] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:18:29,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:18:29,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 22:18:29,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828035141] [2023-11-06 22:18:29,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:18:29,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:18:29,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:18:29,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:18:29,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:18:29,430 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 188 [2023-11-06 22:18:29,431 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 31 transitions, 153 flow. Second operand has 5 states, 5 states have (on average 89.8) internal successors, (449), 5 states have internal predecessors, (449), 0 states have call successors, (0), 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 22:18:29,431 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:18:29,431 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 188 [2023-11-06 22:18:29,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:18:29,705 INFO L124 PetriNetUnfolderBase]: 607/975 cut-off events. [2023-11-06 22:18:29,706 INFO L125 PetriNetUnfolderBase]: For 2586/2688 co-relation queries the response was YES. [2023-11-06 22:18:29,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3310 conditions, 975 events. 607/975 cut-off events. For 2586/2688 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 4279 event pairs, 191 based on Foata normal form. 164/1127 useless extension candidates. Maximal degree in co-relation 1700. Up to 527 conditions per place. [2023-11-06 22:18:29,717 INFO L140 encePairwiseOnDemand]: 181/188 looper letters, 54 selfloop transitions, 8 changer transitions 6/70 dead transitions. [2023-11-06 22:18:29,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 70 transitions, 450 flow [2023-11-06 22:18:29,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:18:29,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:18:29,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 488 transitions. [2023-11-06 22:18:29,720 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5191489361702127 [2023-11-06 22:18:29,721 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 488 transitions. [2023-11-06 22:18:29,721 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 488 transitions. [2023-11-06 22:18:29,721 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:18:29,722 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 488 transitions. [2023-11-06 22:18:29,723 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 97.6) internal successors, (488), 5 states have internal predecessors, (488), 0 states have call successors, (0), 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 22:18:29,726 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 188.0) internal successors, (1128), 6 states have internal predecessors, (1128), 0 states have call successors, (0), 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 22:18:29,727 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 188.0) internal successors, (1128), 6 states have internal predecessors, (1128), 0 states have call successors, (0), 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 22:18:29,727 INFO L175 Difference]: Start difference. First operand has 36 places, 31 transitions, 153 flow. Second operand 5 states and 488 transitions. [2023-11-06 22:18:29,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 70 transitions, 450 flow [2023-11-06 22:18:29,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 70 transitions, 441 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-11-06 22:18:29,736 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 226 flow [2023-11-06 22:18:29,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=226, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2023-11-06 22:18:29,738 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 13 predicate places. [2023-11-06 22:18:29,738 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 226 flow [2023-11-06 22:18:29,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 89.8) internal successors, (449), 5 states have internal predecessors, (449), 0 states have call successors, (0), 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 22:18:29,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:18:29,739 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] [2023-11-06 22:18:29,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-06 22:18:29,739 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 1 more)] === [2023-11-06 22:18:29,740 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:18:29,740 INFO L85 PathProgramCache]: Analyzing trace with hash 365173972, now seen corresponding path program 3 times [2023-11-06 22:18:29,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:18:29,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892217803] [2023-11-06 22:18:29,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:29,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:18:29,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:29,885 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 22:18:29,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:18:29,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892217803] [2023-11-06 22:18:29,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892217803] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:18:29,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:18:29,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 22:18:29,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480547146] [2023-11-06 22:18:29,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:18:29,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:18:29,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:18:29,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:18:29,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:18:29,932 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 188 [2023-11-06 22:18:29,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 226 flow. Second operand has 5 states, 5 states have (on average 89.8) internal successors, (449), 5 states have internal predecessors, (449), 0 states have call successors, (0), 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 22:18:29,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:18:29,934 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 188 [2023-11-06 22:18:29,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:18:30,227 INFO L124 PetriNetUnfolderBase]: 823/1319 cut-off events. [2023-11-06 22:18:30,227 INFO L125 PetriNetUnfolderBase]: For 5208/5484 co-relation queries the response was YES. [2023-11-06 22:18:30,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5398 conditions, 1319 events. 823/1319 cut-off events. For 5208/5484 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 6335 event pairs, 325 based on Foata normal form. 211/1496 useless extension candidates. Maximal degree in co-relation 2049. Up to 800 conditions per place. [2023-11-06 22:18:30,243 INFO L140 encePairwiseOnDemand]: 181/188 looper letters, 58 selfloop transitions, 8 changer transitions 8/76 dead transitions. [2023-11-06 22:18:30,244 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 76 transitions, 639 flow [2023-11-06 22:18:30,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:18:30,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:18:30,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 480 transitions. [2023-11-06 22:18:30,246 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5106382978723404 [2023-11-06 22:18:30,247 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 480 transitions. [2023-11-06 22:18:30,247 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 480 transitions. [2023-11-06 22:18:30,247 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:18:30,247 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 480 transitions. [2023-11-06 22:18:30,249 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 96.0) internal successors, (480), 5 states have internal predecessors, (480), 0 states have call successors, (0), 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 22:18:30,251 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 188.0) internal successors, (1128), 6 states have internal predecessors, (1128), 0 states have call successors, (0), 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 22:18:30,252 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 188.0) internal successors, (1128), 6 states have internal predecessors, (1128), 0 states have call successors, (0), 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 22:18:30,252 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 226 flow. Second operand 5 states and 480 transitions. [2023-11-06 22:18:30,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 76 transitions, 639 flow [2023-11-06 22:18:30,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 76 transitions, 621 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-11-06 22:18:30,262 INFO L231 Difference]: Finished difference. Result has 48 places, 39 transitions, 309 flow [2023-11-06 22:18:30,262 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=309, PETRI_PLACES=48, PETRI_TRANSITIONS=39} [2023-11-06 22:18:30,263 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 19 predicate places. [2023-11-06 22:18:30,263 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 39 transitions, 309 flow [2023-11-06 22:18:30,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 89.8) internal successors, (449), 5 states have internal predecessors, (449), 0 states have call successors, (0), 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 22:18:30,264 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:18:30,264 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] [2023-11-06 22:18:30,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-06 22:18:30,265 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 1 more)] === [2023-11-06 22:18:30,265 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:18:30,265 INFO L85 PathProgramCache]: Analyzing trace with hash 600721734, now seen corresponding path program 1 times [2023-11-06 22:18:30,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:18:30,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633776646] [2023-11-06 22:18:30,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:30,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:18:30,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:30,362 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 22:18:30,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:18:30,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633776646] [2023-11-06 22:18:30,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633776646] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:18:30,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:18:30,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 22:18:30,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978037185] [2023-11-06 22:18:30,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:18:30,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:18:30,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:18:30,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:18:30,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:18:30,395 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 188 [2023-11-06 22:18:30,396 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 39 transitions, 309 flow. Second operand has 4 states, 4 states have (on average 93.5) internal successors, (374), 4 states have internal predecessors, (374), 0 states have call successors, (0), 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 22:18:30,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:18:30,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 188 [2023-11-06 22:18:30,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:18:30,669 INFO L124 PetriNetUnfolderBase]: 754/1226 cut-off events. [2023-11-06 22:18:30,669 INFO L125 PetriNetUnfolderBase]: For 8018/8370 co-relation queries the response was YES. [2023-11-06 22:18:30,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5982 conditions, 1226 events. 754/1226 cut-off events. For 8018/8370 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 6017 event pairs, 356 based on Foata normal form. 266/1442 useless extension candidates. Maximal degree in co-relation 2245. Up to 949 conditions per place. [2023-11-06 22:18:30,687 INFO L140 encePairwiseOnDemand]: 183/188 looper letters, 46 selfloop transitions, 16 changer transitions 2/68 dead transitions. [2023-11-06 22:18:30,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 68 transitions, 691 flow [2023-11-06 22:18:30,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:18:30,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 22:18:30,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 396 transitions. [2023-11-06 22:18:30,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.526595744680851 [2023-11-06 22:18:30,690 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 396 transitions. [2023-11-06 22:18:30,690 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 396 transitions. [2023-11-06 22:18:30,690 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:18:30,691 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 396 transitions. [2023-11-06 22:18:30,692 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 99.0) internal successors, (396), 4 states have internal predecessors, (396), 0 states have call successors, (0), 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 22:18:30,694 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 188.0) internal successors, (940), 5 states have internal predecessors, (940), 0 states have call successors, (0), 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 22:18:30,694 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 188.0) internal successors, (940), 5 states have internal predecessors, (940), 0 states have call successors, (0), 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 22:18:30,694 INFO L175 Difference]: Start difference. First operand has 48 places, 39 transitions, 309 flow. Second operand 4 states and 396 transitions. [2023-11-06 22:18:30,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 68 transitions, 691 flow [2023-11-06 22:18:30,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 68 transitions, 655 flow, removed 13 selfloop flow, removed 1 redundant places. [2023-11-06 22:18:30,706 INFO L231 Difference]: Finished difference. Result has 51 places, 47 transitions, 457 flow [2023-11-06 22:18:30,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=292, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=457, PETRI_PLACES=51, PETRI_TRANSITIONS=47} [2023-11-06 22:18:30,709 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 22 predicate places. [2023-11-06 22:18:30,709 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 47 transitions, 457 flow [2023-11-06 22:18:30,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 93.5) internal successors, (374), 4 states have internal predecessors, (374), 0 states have call successors, (0), 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 22:18:30,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:18:30,710 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] [2023-11-06 22:18:30,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-06 22:18:30,711 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 1 more)] === [2023-11-06 22:18:30,711 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:18:30,711 INFO L85 PathProgramCache]: Analyzing trace with hash 2000165992, now seen corresponding path program 4 times [2023-11-06 22:18:30,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:18:30,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119359763] [2023-11-06 22:18:30,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:30,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:18:30,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:30,855 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 22:18:30,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:18:30,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119359763] [2023-11-06 22:18:30,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119359763] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:18:30,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:18:30,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 22:18:30,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873271491] [2023-11-06 22:18:30,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:18:30,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:18:30,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:18:30,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:18:30,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:18:30,890 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 188 [2023-11-06 22:18:30,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 47 transitions, 457 flow. Second operand has 4 states, 4 states have (on average 93.5) internal successors, (374), 4 states have internal predecessors, (374), 0 states have call successors, (0), 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 22:18:30,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:18:30,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 188 [2023-11-06 22:18:30,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:18:31,236 INFO L124 PetriNetUnfolderBase]: 883/1433 cut-off events. [2023-11-06 22:18:31,236 INFO L125 PetriNetUnfolderBase]: For 10102/10476 co-relation queries the response was YES. [2023-11-06 22:18:31,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7319 conditions, 1433 events. 883/1433 cut-off events. For 10102/10476 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 7028 event pairs, 301 based on Foata normal form. 242/1629 useless extension candidates. Maximal degree in co-relation 3623. Up to 1042 conditions per place. [2023-11-06 22:18:31,255 INFO L140 encePairwiseOnDemand]: 183/188 looper letters, 54 selfloop transitions, 8 changer transitions 15/82 dead transitions. [2023-11-06 22:18:31,255 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 82 transitions, 879 flow [2023-11-06 22:18:31,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:18:31,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 22:18:31,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 404 transitions. [2023-11-06 22:18:31,258 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5372340425531915 [2023-11-06 22:18:31,258 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 404 transitions. [2023-11-06 22:18:31,258 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 404 transitions. [2023-11-06 22:18:31,259 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:18:31,259 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 404 transitions. [2023-11-06 22:18:31,260 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 101.0) internal successors, (404), 4 states have internal predecessors, (404), 0 states have call successors, (0), 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 22:18:31,262 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 188.0) internal successors, (940), 5 states have internal predecessors, (940), 0 states have call successors, (0), 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 22:18:31,262 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 188.0) internal successors, (940), 5 states have internal predecessors, (940), 0 states have call successors, (0), 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 22:18:31,263 INFO L175 Difference]: Start difference. First operand has 51 places, 47 transitions, 457 flow. Second operand 4 states and 404 transitions. [2023-11-06 22:18:31,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 82 transitions, 879 flow [2023-11-06 22:18:31,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 82 transitions, 849 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 22:18:31,276 INFO L231 Difference]: Finished difference. Result has 54 places, 48 transitions, 487 flow [2023-11-06 22:18:31,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=439, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=487, PETRI_PLACES=54, PETRI_TRANSITIONS=48} [2023-11-06 22:18:31,277 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 25 predicate places. [2023-11-06 22:18:31,278 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 48 transitions, 487 flow [2023-11-06 22:18:31,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 93.5) internal successors, (374), 4 states have internal predecessors, (374), 0 states have call successors, (0), 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 22:18:31,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:18:31,278 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] [2023-11-06 22:18:31,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-06 22:18:31,279 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 1 more)] === [2023-11-06 22:18:31,279 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:18:31,279 INFO L85 PathProgramCache]: Analyzing trace with hash -984409918, now seen corresponding path program 5 times [2023-11-06 22:18:31,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:18:31,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269535795] [2023-11-06 22:18:31,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:31,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:18:31,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:31,366 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 22:18:31,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:18:31,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269535795] [2023-11-06 22:18:31,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269535795] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:18:31,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:18:31,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 22:18:31,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713302463] [2023-11-06 22:18:31,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:18:31,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:18:31,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:18:31,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:18:31,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:18:31,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 188 [2023-11-06 22:18:31,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 48 transitions, 487 flow. Second operand has 4 states, 4 states have (on average 93.5) internal successors, (374), 4 states have internal predecessors, (374), 0 states have call successors, (0), 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 22:18:31,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:18:31,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 188 [2023-11-06 22:18:31,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:18:31,672 INFO L124 PetriNetUnfolderBase]: 869/1369 cut-off events. [2023-11-06 22:18:31,672 INFO L125 PetriNetUnfolderBase]: For 12858/13293 co-relation queries the response was YES. [2023-11-06 22:18:31,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7504 conditions, 1369 events. 869/1369 cut-off events. For 12858/13293 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 6466 event pairs, 302 based on Foata normal form. 268/1599 useless extension candidates. Maximal degree in co-relation 3675. Up to 913 conditions per place. [2023-11-06 22:18:31,691 INFO L140 encePairwiseOnDemand]: 183/188 looper letters, 54 selfloop transitions, 20 changer transitions 8/86 dead transitions. [2023-11-06 22:18:31,691 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 86 transitions, 1036 flow [2023-11-06 22:18:31,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:18:31,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 22:18:31,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 398 transitions. [2023-11-06 22:18:31,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5292553191489362 [2023-11-06 22:18:31,694 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 398 transitions. [2023-11-06 22:18:31,694 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 398 transitions. [2023-11-06 22:18:31,694 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:18:31,694 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 398 transitions. [2023-11-06 22:18:31,696 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 99.5) internal successors, (398), 4 states have internal predecessors, (398), 0 states have call successors, (0), 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 22:18:31,698 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 188.0) internal successors, (940), 5 states have internal predecessors, (940), 0 states have call successors, (0), 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 22:18:31,698 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 188.0) internal successors, (940), 5 states have internal predecessors, (940), 0 states have call successors, (0), 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 22:18:31,698 INFO L175 Difference]: Start difference. First operand has 54 places, 48 transitions, 487 flow. Second operand 4 states and 398 transitions. [2023-11-06 22:18:31,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 86 transitions, 1036 flow [2023-11-06 22:18:31,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 86 transitions, 996 flow, removed 16 selfloop flow, removed 1 redundant places. [2023-11-06 22:18:31,716 INFO L231 Difference]: Finished difference. Result has 56 places, 57 transitions, 689 flow [2023-11-06 22:18:31,716 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=466, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=689, PETRI_PLACES=56, PETRI_TRANSITIONS=57} [2023-11-06 22:18:31,717 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 27 predicate places. [2023-11-06 22:18:31,717 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 57 transitions, 689 flow [2023-11-06 22:18:31,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 93.5) internal successors, (374), 4 states have internal predecessors, (374), 0 states have call successors, (0), 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 22:18:31,718 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:18:31,718 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] [2023-11-06 22:18:31,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-06 22:18:31,719 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 1 more)] === [2023-11-06 22:18:31,719 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:18:31,719 INFO L85 PathProgramCache]: Analyzing trace with hash -860092256, now seen corresponding path program 2 times [2023-11-06 22:18:31,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:18:31,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959707556] [2023-11-06 22:18:31,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:31,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:18:31,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:31,814 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 22:18:31,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:18:31,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959707556] [2023-11-06 22:18:31,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959707556] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:18:31,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:18:31,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 22:18:31,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042819971] [2023-11-06 22:18:31,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:18:31,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:18:31,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:18:31,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:18:31,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:18:31,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 188 [2023-11-06 22:18:31,846 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 57 transitions, 689 flow. Second operand has 4 states, 4 states have (on average 93.5) internal successors, (374), 4 states have internal predecessors, (374), 0 states have call successors, (0), 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 22:18:31,847 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:18:31,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 188 [2023-11-06 22:18:31,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:18:32,126 INFO L124 PetriNetUnfolderBase]: 814/1221 cut-off events. [2023-11-06 22:18:32,126 INFO L125 PetriNetUnfolderBase]: For 12250/12622 co-relation queries the response was YES. [2023-11-06 22:18:32,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7490 conditions, 1221 events. 814/1221 cut-off events. For 12250/12622 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 5174 event pairs, 156 based on Foata normal form. 234/1418 useless extension candidates. Maximal degree in co-relation 4025. Up to 904 conditions per place. [2023-11-06 22:18:32,144 INFO L140 encePairwiseOnDemand]: 183/188 looper letters, 58 selfloop transitions, 13 changer transitions 8/83 dead transitions. [2023-11-06 22:18:32,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 83 transitions, 1072 flow [2023-11-06 22:18:32,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:18:32,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 22:18:32,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 398 transitions. [2023-11-06 22:18:32,147 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5292553191489362 [2023-11-06 22:18:32,147 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 398 transitions. [2023-11-06 22:18:32,148 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 398 transitions. [2023-11-06 22:18:32,148 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:18:32,148 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 398 transitions. [2023-11-06 22:18:32,150 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 99.5) internal successors, (398), 4 states have internal predecessors, (398), 0 states have call successors, (0), 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 22:18:32,151 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 188.0) internal successors, (940), 5 states have internal predecessors, (940), 0 states have call successors, (0), 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 22:18:32,152 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 188.0) internal successors, (940), 5 states have internal predecessors, (940), 0 states have call successors, (0), 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 22:18:32,152 INFO L175 Difference]: Start difference. First operand has 56 places, 57 transitions, 689 flow. Second operand 4 states and 398 transitions. [2023-11-06 22:18:32,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 83 transitions, 1072 flow [2023-11-06 22:18:32,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 83 transitions, 986 flow, removed 30 selfloop flow, removed 3 redundant places. [2023-11-06 22:18:32,169 INFO L231 Difference]: Finished difference. Result has 56 places, 57 transitions, 670 flow [2023-11-06 22:18:32,170 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=611, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=670, PETRI_PLACES=56, PETRI_TRANSITIONS=57} [2023-11-06 22:18:32,170 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 27 predicate places. [2023-11-06 22:18:32,171 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 57 transitions, 670 flow [2023-11-06 22:18:32,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 93.5) internal successors, (374), 4 states have internal predecessors, (374), 0 states have call successors, (0), 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 22:18:32,171 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:18:32,171 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] [2023-11-06 22:18:32,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-06 22:18:32,172 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 1 more)] === [2023-11-06 22:18:32,172 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:18:32,172 INFO L85 PathProgramCache]: Analyzing trace with hash 755109344, now seen corresponding path program 1 times [2023-11-06 22:18:32,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:18:32,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29109508] [2023-11-06 22:18:32,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:32,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:18:32,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:32,293 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:18:32,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:18:32,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29109508] [2023-11-06 22:18:32,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29109508] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:18:32,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23273269] [2023-11-06 22:18:32,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:32,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:18:32,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed733aae-4d5c-424b-8d82-99a8b3bc25b3/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:18:32,298 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed733aae-4d5c-424b-8d82-99a8b3bc25b3/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:18:32,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed733aae-4d5c-424b-8d82-99a8b3bc25b3/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 22:18:32,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:32,419 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 22:18:32,425 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:18:32,523 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:18:32,523 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:18:32,583 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:18:32,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23273269] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:18:32,584 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:18:32,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2023-11-06 22:18:32,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181848841] [2023-11-06 22:18:32,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:18:32,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:18:32,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:18:32,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:18:32,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:18:32,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 188 [2023-11-06 22:18:32,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 57 transitions, 670 flow. Second operand has 7 states, 7 states have (on average 89.42857142857143) internal successors, (626), 7 states have internal predecessors, (626), 0 states have call successors, (0), 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 22:18:32,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:18:32,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 188 [2023-11-06 22:18:32,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:18:33,219 INFO L124 PetriNetUnfolderBase]: 1211/1756 cut-off events. [2023-11-06 22:18:33,219 INFO L125 PetriNetUnfolderBase]: For 18265/18606 co-relation queries the response was YES. [2023-11-06 22:18:33,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11029 conditions, 1756 events. 1211/1756 cut-off events. For 18265/18606 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 7315 event pairs, 240 based on Foata normal form. 151/1900 useless extension candidates. Maximal degree in co-relation 7519. Up to 998 conditions per place. [2023-11-06 22:18:33,245 INFO L140 encePairwiseOnDemand]: 181/188 looper letters, 103 selfloop transitions, 48 changer transitions 3/156 dead transitions. [2023-11-06 22:18:33,246 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 156 transitions, 2057 flow [2023-11-06 22:18:33,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 22:18:33,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-06 22:18:33,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 846 transitions. [2023-11-06 22:18:33,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2023-11-06 22:18:33,250 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 846 transitions. [2023-11-06 22:18:33,250 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 846 transitions. [2023-11-06 22:18:33,251 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:18:33,251 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 846 transitions. [2023-11-06 22:18:33,253 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 94.0) internal successors, (846), 9 states have internal predecessors, (846), 0 states have call successors, (0), 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 22:18:33,257 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 188.0) internal successors, (1880), 10 states have internal predecessors, (1880), 0 states have call successors, (0), 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 22:18:33,258 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 188.0) internal successors, (1880), 10 states have internal predecessors, (1880), 0 states have call successors, (0), 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 22:18:33,258 INFO L175 Difference]: Start difference. First operand has 56 places, 57 transitions, 670 flow. Second operand 9 states and 846 transitions. [2023-11-06 22:18:33,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 156 transitions, 2057 flow [2023-11-06 22:18:33,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 156 transitions, 1935 flow, removed 54 selfloop flow, removed 2 redundant places. [2023-11-06 22:18:33,283 INFO L231 Difference]: Finished difference. Result has 65 places, 93 transitions, 1324 flow [2023-11-06 22:18:33,283 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=614, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1324, PETRI_PLACES=65, PETRI_TRANSITIONS=93} [2023-11-06 22:18:33,284 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 36 predicate places. [2023-11-06 22:18:33,284 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 93 transitions, 1324 flow [2023-11-06 22:18:33,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 89.42857142857143) internal successors, (626), 7 states have internal predecessors, (626), 0 states have call successors, (0), 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 22:18:33,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:18:33,285 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] [2023-11-06 22:18:33,295 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed733aae-4d5c-424b-8d82-99a8b3bc25b3/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-06 22:18:33,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed733aae-4d5c-424b-8d82-99a8b3bc25b3/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-06 22:18:33,492 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 1 more)] === [2023-11-06 22:18:33,492 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:18:33,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1617305066, now seen corresponding path program 2 times [2023-11-06 22:18:33,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:18:33,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402451794] [2023-11-06 22:18:33,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:33,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:18:33,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:33,631 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:18:33,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:18:33,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402451794] [2023-11-06 22:18:33,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402451794] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:18:33,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342615923] [2023-11-06 22:18:33,632 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:18:33,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:18:33,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed733aae-4d5c-424b-8d82-99a8b3bc25b3/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:18:33,634 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed733aae-4d5c-424b-8d82-99a8b3bc25b3/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:18:33,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed733aae-4d5c-424b-8d82-99a8b3bc25b3/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 22:18:33,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:18:33,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:18:33,741 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 22:18:33,743 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:18:33,791 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 22:18:33,792 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:18:33,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342615923] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:18:33,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:18:33,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2023-11-06 22:18:33,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114399350] [2023-11-06 22:18:33,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:18:33,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:18:33,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:18:33,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:18:33,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:18:33,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 188 [2023-11-06 22:18:33,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 93 transitions, 1324 flow. Second operand has 4 states, 4 states have (on average 93.75) internal successors, (375), 4 states have internal predecessors, (375), 0 states have call successors, (0), 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 22:18:33,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:18:33,821 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 188 [2023-11-06 22:18:33,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:18:34,168 INFO L124 PetriNetUnfolderBase]: 1168/1666 cut-off events. [2023-11-06 22:18:34,169 INFO L125 PetriNetUnfolderBase]: For 23609/24015 co-relation queries the response was YES. [2023-11-06 22:18:34,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11665 conditions, 1666 events. 1168/1666 cut-off events. For 23609/24015 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 6775 event pairs, 209 based on Foata normal form. 201/1860 useless extension candidates. Maximal degree in co-relation 11199. Up to 1011 conditions per place. [2023-11-06 22:18:34,194 INFO L140 encePairwiseOnDemand]: 183/188 looper letters, 69 selfloop transitions, 55 changer transitions 1/131 dead transitions. [2023-11-06 22:18:34,194 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 131 transitions, 2000 flow [2023-11-06 22:18:34,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:18:34,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 22:18:34,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 398 transitions. [2023-11-06 22:18:34,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5292553191489362 [2023-11-06 22:18:34,197 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 398 transitions. [2023-11-06 22:18:34,197 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 398 transitions. [2023-11-06 22:18:34,197 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:18:34,198 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 398 transitions. [2023-11-06 22:18:34,199 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 99.5) internal successors, (398), 4 states have internal predecessors, (398), 0 states have call successors, (0), 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 22:18:34,201 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 188.0) internal successors, (940), 5 states have internal predecessors, (940), 0 states have call successors, (0), 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 22:18:34,202 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 188.0) internal successors, (940), 5 states have internal predecessors, (940), 0 states have call successors, (0), 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 22:18:34,202 INFO L175 Difference]: Start difference. First operand has 65 places, 93 transitions, 1324 flow. Second operand 4 states and 398 transitions. [2023-11-06 22:18:34,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 131 transitions, 2000 flow [2023-11-06 22:18:34,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 131 transitions, 1890 flow, removed 55 selfloop flow, removed 0 redundant places. [2023-11-06 22:18:34,238 INFO L231 Difference]: Finished difference. Result has 69 places, 106 transitions, 1596 flow [2023-11-06 22:18:34,238 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=1228, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1596, PETRI_PLACES=69, PETRI_TRANSITIONS=106} [2023-11-06 22:18:34,239 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 40 predicate places. [2023-11-06 22:18:34,239 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 106 transitions, 1596 flow [2023-11-06 22:18:34,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 93.75) internal successors, (375), 4 states have internal predecessors, (375), 0 states have call successors, (0), 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 22:18:34,239 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:18:34,240 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] [2023-11-06 22:18:34,249 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed733aae-4d5c-424b-8d82-99a8b3bc25b3/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 22:18:34,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed733aae-4d5c-424b-8d82-99a8b3bc25b3/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-06 22:18:34,446 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 1 more)] === [2023-11-06 22:18:34,446 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:18:34,446 INFO L85 PathProgramCache]: Analyzing trace with hash 2008394370, now seen corresponding path program 1 times [2023-11-06 22:18:34,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:18:34,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423786150] [2023-11-06 22:18:34,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:34,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:18:34,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:34,802 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:18:34,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:18:34,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423786150] [2023-11-06 22:18:34,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423786150] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:18:34,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507800309] [2023-11-06 22:18:34,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:34,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:18:34,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed733aae-4d5c-424b-8d82-99a8b3bc25b3/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:18:34,805 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed733aae-4d5c-424b-8d82-99a8b3bc25b3/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:18:34,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed733aae-4d5c-424b-8d82-99a8b3bc25b3/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 22:18:34,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:34,947 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-06 22:18:34,949 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:18:35,101 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:18:35,102 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:18:35,923 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:18:35,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507800309] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:18:35,923 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:18:35,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 11 [2023-11-06 22:18:35,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515127097] [2023-11-06 22:18:35,924 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:18:35,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-06 22:18:35,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:18:35,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-06 22:18:35,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2023-11-06 22:18:35,986 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 188 [2023-11-06 22:18:35,987 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 106 transitions, 1596 flow. Second operand has 13 states, 13 states have (on average 92.38461538461539) internal successors, (1201), 13 states have internal predecessors, (1201), 0 states have call successors, (0), 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 22:18:35,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:18:35,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 188 [2023-11-06 22:18:35,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:18:36,779 INFO L124 PetriNetUnfolderBase]: 1625/2329 cut-off events. [2023-11-06 22:18:36,779 INFO L125 PetriNetUnfolderBase]: For 32429/33092 co-relation queries the response was YES. [2023-11-06 22:18:36,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16624 conditions, 2329 events. 1625/2329 cut-off events. For 32429/33092 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 9856 event pairs, 64 based on Foata normal form. 186/2432 useless extension candidates. Maximal degree in co-relation 16222. Up to 1732 conditions per place. [2023-11-06 22:18:36,813 INFO L140 encePairwiseOnDemand]: 183/188 looper letters, 133 selfloop transitions, 53 changer transitions 2/198 dead transitions. [2023-11-06 22:18:36,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 198 transitions, 2762 flow [2023-11-06 22:18:36,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 22:18:36,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-06 22:18:36,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 890 transitions. [2023-11-06 22:18:36,818 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5260047281323877 [2023-11-06 22:18:36,818 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 890 transitions. [2023-11-06 22:18:36,818 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 890 transitions. [2023-11-06 22:18:36,819 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:18:36,819 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 890 transitions. [2023-11-06 22:18:36,822 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 98.88888888888889) internal successors, (890), 9 states have internal predecessors, (890), 0 states have call successors, (0), 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 22:18:36,826 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 188.0) internal successors, (1880), 10 states have internal predecessors, (1880), 0 states have call successors, (0), 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 22:18:36,827 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 188.0) internal successors, (1880), 10 states have internal predecessors, (1880), 0 states have call successors, (0), 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 22:18:36,827 INFO L175 Difference]: Start difference. First operand has 69 places, 106 transitions, 1596 flow. Second operand 9 states and 890 transitions. [2023-11-06 22:18:36,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 198 transitions, 2762 flow [2023-11-06 22:18:36,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 198 transitions, 2625 flow, removed 22 selfloop flow, removed 3 redundant places. [2023-11-06 22:18:36,875 INFO L231 Difference]: Finished difference. Result has 77 places, 141 transitions, 2245 flow [2023-11-06 22:18:36,875 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=1483, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2245, PETRI_PLACES=77, PETRI_TRANSITIONS=141} [2023-11-06 22:18:36,878 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 48 predicate places. [2023-11-06 22:18:36,878 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 141 transitions, 2245 flow [2023-11-06 22:18:36,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 92.38461538461539) internal successors, (1201), 13 states have internal predecessors, (1201), 0 states have call successors, (0), 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 22:18:36,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:18:36,879 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] [2023-11-06 22:18:36,890 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed733aae-4d5c-424b-8d82-99a8b3bc25b3/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 22:18:37,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed733aae-4d5c-424b-8d82-99a8b3bc25b3/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-06 22:18:37,085 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 1 more)] === [2023-11-06 22:18:37,086 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:18:37,086 INFO L85 PathProgramCache]: Analyzing trace with hash 384329540, now seen corresponding path program 2 times [2023-11-06 22:18:37,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:18:37,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484470120] [2023-11-06 22:18:37,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:37,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:18:37,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:37,426 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:18:37,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:18:37,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484470120] [2023-11-06 22:18:37,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484470120] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:18:37,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325188525] [2023-11-06 22:18:37,427 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:18:37,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:18:37,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed733aae-4d5c-424b-8d82-99a8b3bc25b3/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:18:37,429 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed733aae-4d5c-424b-8d82-99a8b3bc25b3/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:18:37,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed733aae-4d5c-424b-8d82-99a8b3bc25b3/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 22:18:37,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:18:37,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:18:37,589 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-06 22:18:37,591 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:18:37,741 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:18:37,742 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:18:38,529 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:18:38,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325188525] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:18:38,529 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:18:38,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 10 [2023-11-06 22:18:38,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074670153] [2023-11-06 22:18:38,532 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:18:38,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 22:18:38,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:18:38,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 22:18:38,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2023-11-06 22:18:38,600 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 188 [2023-11-06 22:18:38,601 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 141 transitions, 2245 flow. Second operand has 12 states, 12 states have (on average 92.16666666666667) internal successors, (1106), 12 states have internal predecessors, (1106), 0 states have call successors, (0), 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 22:18:38,601 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:18:38,601 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 188 [2023-11-06 22:18:38,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:18:39,475 INFO L124 PetriNetUnfolderBase]: 2047/2961 cut-off events. [2023-11-06 22:18:39,476 INFO L125 PetriNetUnfolderBase]: For 41751/42310 co-relation queries the response was YES. [2023-11-06 22:18:39,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21322 conditions, 2961 events. 2047/2961 cut-off events. For 41751/42310 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 13251 event pairs, 210 based on Foata normal form. 201/3084 useless extension candidates. Maximal degree in co-relation 20611. Up to 2248 conditions per place. [2023-11-06 22:18:39,512 INFO L140 encePairwiseOnDemand]: 183/188 looper letters, 157 selfloop transitions, 57 changer transitions 2/226 dead transitions. [2023-11-06 22:18:39,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 226 transitions, 3318 flow [2023-11-06 22:18:39,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 22:18:39,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-06 22:18:39,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 894 transitions. [2023-11-06 22:18:39,517 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5283687943262412 [2023-11-06 22:18:39,517 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 894 transitions. [2023-11-06 22:18:39,517 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 894 transitions. [2023-11-06 22:18:39,518 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:18:39,519 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 894 transitions. [2023-11-06 22:18:39,521 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 99.33333333333333) internal successors, (894), 9 states have internal predecessors, (894), 0 states have call successors, (0), 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 22:18:39,526 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 188.0) internal successors, (1880), 10 states have internal predecessors, (1880), 0 states have call successors, (0), 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 22:18:39,527 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 188.0) internal successors, (1880), 10 states have internal predecessors, (1880), 0 states have call successors, (0), 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 22:18:39,527 INFO L175 Difference]: Start difference. First operand has 77 places, 141 transitions, 2245 flow. Second operand 9 states and 894 transitions. [2023-11-06 22:18:39,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 226 transitions, 3318 flow [2023-11-06 22:18:39,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 226 transitions, 3048 flow, removed 126 selfloop flow, removed 1 redundant places. [2023-11-06 22:18:39,613 INFO L231 Difference]: Finished difference. Result has 87 places, 164 transitions, 2562 flow [2023-11-06 22:18:39,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=1975, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2562, PETRI_PLACES=87, PETRI_TRANSITIONS=164} [2023-11-06 22:18:39,616 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 58 predicate places. [2023-11-06 22:18:39,616 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 164 transitions, 2562 flow [2023-11-06 22:18:39,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 92.16666666666667) internal successors, (1106), 12 states have internal predecessors, (1106), 0 states have call successors, (0), 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 22:18:39,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:18:39,617 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] [2023-11-06 22:18:39,631 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed733aae-4d5c-424b-8d82-99a8b3bc25b3/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 22:18:39,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed733aae-4d5c-424b-8d82-99a8b3bc25b3/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-06 22:18:39,824 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 1 more)] === [2023-11-06 22:18:39,824 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:18:39,825 INFO L85 PathProgramCache]: Analyzing trace with hash -306109030, now seen corresponding path program 3 times [2023-11-06 22:18:39,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:18:39,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686509866] [2023-11-06 22:18:39,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:39,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:18:39,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:40,124 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:18:40,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:18:40,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686509866] [2023-11-06 22:18:40,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686509866] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:18:40,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093921493] [2023-11-06 22:18:40,125 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:18:40,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:18:40,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed733aae-4d5c-424b-8d82-99a8b3bc25b3/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:18:40,127 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed733aae-4d5c-424b-8d82-99a8b3bc25b3/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:18:40,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed733aae-4d5c-424b-8d82-99a8b3bc25b3/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 22:18:40,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 22:18:40,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:18:40,275 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-06 22:18:40,276 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:18:40,418 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:18:40,418 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:18:41,129 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:18:41,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093921493] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:18:41,129 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:18:41,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 11 [2023-11-06 22:18:41,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402933620] [2023-11-06 22:18:41,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:18:41,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-06 22:18:41,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:18:41,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-06 22:18:41,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2023-11-06 22:18:41,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 188 [2023-11-06 22:18:41,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 164 transitions, 2562 flow. Second operand has 13 states, 13 states have (on average 92.38461538461539) internal successors, (1201), 13 states have internal predecessors, (1201), 0 states have call successors, (0), 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 22:18:41,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:18:41,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 188 [2023-11-06 22:18:41,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:18:42,425 INFO L124 PetriNetUnfolderBase]: 2587/3751 cut-off events. [2023-11-06 22:18:42,425 INFO L125 PetriNetUnfolderBase]: For 55529/56156 co-relation queries the response was YES. [2023-11-06 22:18:42,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26556 conditions, 3751 events. 2587/3751 cut-off events. For 55529/56156 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 17443 event pairs, 396 based on Foata normal form. 215/3858 useless extension candidates. Maximal degree in co-relation 26065. Up to 3066 conditions per place. [2023-11-06 22:18:42,473 INFO L140 encePairwiseOnDemand]: 183/188 looper letters, 191 selfloop transitions, 60 changer transitions 2/263 dead transitions. [2023-11-06 22:18:42,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 263 transitions, 4051 flow [2023-11-06 22:18:42,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 22:18:42,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-06 22:18:42,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 890 transitions. [2023-11-06 22:18:42,478 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5260047281323877 [2023-11-06 22:18:42,478 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 890 transitions. [2023-11-06 22:18:42,478 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 890 transitions. [2023-11-06 22:18:42,479 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:18:42,480 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 890 transitions. [2023-11-06 22:18:42,482 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 98.88888888888889) internal successors, (890), 9 states have internal predecessors, (890), 0 states have call successors, (0), 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 22:18:42,486 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 188.0) internal successors, (1880), 10 states have internal predecessors, (1880), 0 states have call successors, (0), 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 22:18:42,487 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 188.0) internal successors, (1880), 10 states have internal predecessors, (1880), 0 states have call successors, (0), 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 22:18:42,487 INFO L175 Difference]: Start difference. First operand has 87 places, 164 transitions, 2562 flow. Second operand 9 states and 890 transitions. [2023-11-06 22:18:42,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 263 transitions, 4051 flow [2023-11-06 22:18:42,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 263 transitions, 3759 flow, removed 126 selfloop flow, removed 2 redundant places. [2023-11-06 22:18:42,573 INFO L231 Difference]: Finished difference. Result has 97 places, 206 transitions, 3276 flow [2023-11-06 22:18:42,574 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=2270, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3276, PETRI_PLACES=97, PETRI_TRANSITIONS=206} [2023-11-06 22:18:42,575 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 68 predicate places. [2023-11-06 22:18:42,575 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 206 transitions, 3276 flow [2023-11-06 22:18:42,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 92.38461538461539) internal successors, (1201), 13 states have internal predecessors, (1201), 0 states have call successors, (0), 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 22:18:42,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:18:42,576 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] [2023-11-06 22:18:42,587 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed733aae-4d5c-424b-8d82-99a8b3bc25b3/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 22:18:42,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed733aae-4d5c-424b-8d82-99a8b3bc25b3/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-06 22:18:42,782 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 1 more)] === [2023-11-06 22:18:42,783 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:18:42,783 INFO L85 PathProgramCache]: Analyzing trace with hash 1940530020, now seen corresponding path program 4 times [2023-11-06 22:18:42,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:18:42,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55671754] [2023-11-06 22:18:42,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:42,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:18:42,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:43,117 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:18:43,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:18:43,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55671754] [2023-11-06 22:18:43,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55671754] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:18:43,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295423674] [2023-11-06 22:18:43,119 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:18:43,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:18:43,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed733aae-4d5c-424b-8d82-99a8b3bc25b3/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:18:43,120 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed733aae-4d5c-424b-8d82-99a8b3bc25b3/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:18:43,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed733aae-4d5c-424b-8d82-99a8b3bc25b3/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 22:18:43,264 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:18:43,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:18:43,268 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-06 22:18:43,270 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:18:43,428 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:18:43,429 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:18:44,080 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:18:44,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295423674] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:18:44,080 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:18:44,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 8 [2023-11-06 22:18:44,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112373209] [2023-11-06 22:18:44,081 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:18:44,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 22:18:44,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:18:44,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 22:18:44,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-11-06 22:18:44,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 188 [2023-11-06 22:18:44,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 206 transitions, 3276 flow. Second operand has 10 states, 10 states have (on average 92.7) internal successors, (927), 10 states have internal predecessors, (927), 0 states have call successors, (0), 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 22:18:44,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:18:44,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 188 [2023-11-06 22:18:44,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:18:45,346 INFO L124 PetriNetUnfolderBase]: 2895/4203 cut-off events. [2023-11-06 22:18:45,346 INFO L125 PetriNetUnfolderBase]: For 61139/61786 co-relation queries the response was YES. [2023-11-06 22:18:45,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29319 conditions, 4203 events. 2895/4203 cut-off events. For 61139/61786 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 20018 event pairs, 532 based on Foata normal form. 221/4318 useless extension candidates. Maximal degree in co-relation 28793. Up to 3676 conditions per place. [2023-11-06 22:18:45,409 INFO L140 encePairwiseOnDemand]: 183/188 looper letters, 206 selfloop transitions, 57 changer transitions 2/275 dead transitions. [2023-11-06 22:18:45,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 275 transitions, 4390 flow [2023-11-06 22:18:45,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 22:18:45,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-06 22:18:45,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 884 transitions. [2023-11-06 22:18:45,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5224586288416075 [2023-11-06 22:18:45,415 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 884 transitions. [2023-11-06 22:18:45,415 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 884 transitions. [2023-11-06 22:18:45,416 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:18:45,416 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 884 transitions. [2023-11-06 22:18:45,419 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 98.22222222222223) internal successors, (884), 9 states have internal predecessors, (884), 0 states have call successors, (0), 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 22:18:45,424 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 188.0) internal successors, (1880), 10 states have internal predecessors, (1880), 0 states have call successors, (0), 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 22:18:45,425 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 188.0) internal successors, (1880), 10 states have internal predecessors, (1880), 0 states have call successors, (0), 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 22:18:45,425 INFO L175 Difference]: Start difference. First operand has 97 places, 206 transitions, 3276 flow. Second operand 9 states and 884 transitions. [2023-11-06 22:18:45,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 275 transitions, 4390 flow [2023-11-06 22:18:45,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 275 transitions, 3982 flow, removed 195 selfloop flow, removed 1 redundant places. [2023-11-06 22:18:45,664 INFO L231 Difference]: Finished difference. Result has 107 places, 225 transitions, 3418 flow [2023-11-06 22:18:45,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=2868, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3418, PETRI_PLACES=107, PETRI_TRANSITIONS=225} [2023-11-06 22:18:45,665 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 78 predicate places. [2023-11-06 22:18:45,666 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 225 transitions, 3418 flow [2023-11-06 22:18:45,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 92.7) internal successors, (927), 10 states have internal predecessors, (927), 0 states have call successors, (0), 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 22:18:45,666 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:18:45,667 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] [2023-11-06 22:18:45,677 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed733aae-4d5c-424b-8d82-99a8b3bc25b3/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 22:18:45,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed733aae-4d5c-424b-8d82-99a8b3bc25b3/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-06 22:18:45,873 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 1 more)] === [2023-11-06 22:18:45,873 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:18:45,873 INFO L85 PathProgramCache]: Analyzing trace with hash 29332352, now seen corresponding path program 5 times [2023-11-06 22:18:45,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:18:45,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283372332] [2023-11-06 22:18:45,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:45,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:18:45,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:46,152 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:18:46,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:18:46,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283372332] [2023-11-06 22:18:46,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283372332] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:18:46,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138792637] [2023-11-06 22:18:46,153 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:18:46,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:18:46,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed733aae-4d5c-424b-8d82-99a8b3bc25b3/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:18:46,155 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed733aae-4d5c-424b-8d82-99a8b3bc25b3/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:18:46,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed733aae-4d5c-424b-8d82-99a8b3bc25b3/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 22:18:46,295 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-06 22:18:46,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:18:46,297 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-06 22:18:46,299 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:18:46,410 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:18:46,410 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:18:48,327 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:18:48,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138792637] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:18:48,328 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:18:48,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 9 [2023-11-06 22:18:48,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974646572] [2023-11-06 22:18:48,329 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:18:48,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-06 22:18:48,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:18:48,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-06 22:18:48,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2023-11-06 22:18:48,386 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 188 [2023-11-06 22:18:48,388 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 225 transitions, 3418 flow. Second operand has 11 states, 11 states have (on average 92.45454545454545) internal successors, (1017), 11 states have internal predecessors, (1017), 0 states have call successors, (0), 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 22:18:48,388 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:18:48,388 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 188 [2023-11-06 22:18:48,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:18:49,754 INFO L124 PetriNetUnfolderBase]: 3269/4747 cut-off events. [2023-11-06 22:18:49,754 INFO L125 PetriNetUnfolderBase]: For 64875/65576 co-relation queries the response was YES. [2023-11-06 22:18:49,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31961 conditions, 4747 events. 3269/4747 cut-off events. For 64875/65576 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 23169 event pairs, 676 based on Foata normal form. 227/4854 useless extension candidates. Maximal degree in co-relation 31393. Up to 4232 conditions per place. [2023-11-06 22:18:49,820 INFO L140 encePairwiseOnDemand]: 183/188 looper letters, 243 selfloop transitions, 49 changer transitions 2/304 dead transitions. [2023-11-06 22:18:49,820 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 304 transitions, 4825 flow [2023-11-06 22:18:49,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 22:18:49,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-06 22:18:49,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 882 transitions. [2023-11-06 22:18:49,826 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5212765957446809 [2023-11-06 22:18:49,826 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 882 transitions. [2023-11-06 22:18:49,826 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 882 transitions. [2023-11-06 22:18:49,827 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:18:49,827 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 882 transitions. [2023-11-06 22:18:49,831 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 98.0) internal successors, (882), 9 states have internal predecessors, (882), 0 states have call successors, (0), 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 22:18:49,835 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 188.0) internal successors, (1880), 10 states have internal predecessors, (1880), 0 states have call successors, (0), 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 22:18:49,836 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 188.0) internal successors, (1880), 10 states have internal predecessors, (1880), 0 states have call successors, (0), 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 22:18:49,837 INFO L175 Difference]: Start difference. First operand has 107 places, 225 transitions, 3418 flow. Second operand 9 states and 882 transitions. [2023-11-06 22:18:49,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 304 transitions, 4825 flow [2023-11-06 22:18:49,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 304 transitions, 4524 flow, removed 129 selfloop flow, removed 2 redundant places. [2023-11-06 22:18:49,993 INFO L231 Difference]: Finished difference. Result has 117 places, 256 transitions, 3913 flow [2023-11-06 22:18:49,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=3117, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3913, PETRI_PLACES=117, PETRI_TRANSITIONS=256} [2023-11-06 22:18:49,995 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 88 predicate places. [2023-11-06 22:18:49,995 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 256 transitions, 3913 flow [2023-11-06 22:18:49,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 92.45454545454545) internal successors, (1017), 11 states have internal predecessors, (1017), 0 states have call successors, (0), 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 22:18:49,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:18:49,996 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] [2023-11-06 22:18:50,008 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed733aae-4d5c-424b-8d82-99a8b3bc25b3/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-06 22:18:50,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed733aae-4d5c-424b-8d82-99a8b3bc25b3/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-06 22:18:50,203 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 1 more)] === [2023-11-06 22:18:50,203 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:18:50,203 INFO L85 PathProgramCache]: Analyzing trace with hash -1613288206, now seen corresponding path program 6 times [2023-11-06 22:18:50,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:18:50,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410663501] [2023-11-06 22:18:50,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:50,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:18:50,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:50,507 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:18:50,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:18:50,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410663501] [2023-11-06 22:18:50,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410663501] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:18:50,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170447220] [2023-11-06 22:18:50,508 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:18:50,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:18:50,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed733aae-4d5c-424b-8d82-99a8b3bc25b3/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:18:50,512 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed733aae-4d5c-424b-8d82-99a8b3bc25b3/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:18:50,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed733aae-4d5c-424b-8d82-99a8b3bc25b3/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 22:18:50,655 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-06 22:18:50,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:18:50,657 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-06 22:18:50,659 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:18:50,789 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:18:50,789 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:18:52,331 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:18:52,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170447220] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:18:52,332 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:18:52,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 10 [2023-11-06 22:18:52,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607954471] [2023-11-06 22:18:52,334 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:18:52,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 22:18:52,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:18:52,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 22:18:52,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2023-11-06 22:18:52,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 188 [2023-11-06 22:18:52,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 256 transitions, 3913 flow. Second operand has 12 states, 12 states have (on average 92.16666666666667) internal successors, (1106), 12 states have internal predecessors, (1106), 0 states have call successors, (0), 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 22:18:52,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:18:52,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 188 [2023-11-06 22:18:52,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:18:53,752 INFO L124 PetriNetUnfolderBase]: 3603/5239 cut-off events. [2023-11-06 22:18:53,752 INFO L125 PetriNetUnfolderBase]: For 73359/74018 co-relation queries the response was YES. [2023-11-06 22:18:53,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35270 conditions, 5239 events. 3603/5239 cut-off events. For 73359/74018 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 26118 event pairs, 828 based on Foata normal form. 235/5354 useless extension candidates. Maximal degree in co-relation 34651. Up to 4690 conditions per place. [2023-11-06 22:18:53,815 INFO L140 encePairwiseOnDemand]: 183/188 looper letters, 264 selfloop transitions, 49 changer transitions 2/325 dead transitions. [2023-11-06 22:18:53,816 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 325 transitions, 5215 flow [2023-11-06 22:18:53,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 22:18:53,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-06 22:18:53,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 884 transitions. [2023-11-06 22:18:53,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5224586288416075 [2023-11-06 22:18:53,824 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 884 transitions. [2023-11-06 22:18:53,824 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 884 transitions. [2023-11-06 22:18:53,825 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:18:53,826 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 884 transitions. [2023-11-06 22:18:53,830 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 98.22222222222223) internal successors, (884), 9 states have internal predecessors, (884), 0 states have call successors, (0), 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 22:18:53,834 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 188.0) internal successors, (1880), 10 states have internal predecessors, (1880), 0 states have call successors, (0), 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 22:18:53,835 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 188.0) internal successors, (1880), 10 states have internal predecessors, (1880), 0 states have call successors, (0), 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 22:18:53,836 INFO L175 Difference]: Start difference. First operand has 117 places, 256 transitions, 3913 flow. Second operand 9 states and 884 transitions. [2023-11-06 22:18:53,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 325 transitions, 5215 flow [2023-11-06 22:18:53,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 325 transitions, 4839 flow, removed 179 selfloop flow, removed 1 redundant places. [2023-11-06 22:18:53,984 INFO L231 Difference]: Finished difference. Result has 127 places, 275 transitions, 4133 flow [2023-11-06 22:18:53,985 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=3537, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4133, PETRI_PLACES=127, PETRI_TRANSITIONS=275} [2023-11-06 22:18:53,985 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 98 predicate places. [2023-11-06 22:18:53,985 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 275 transitions, 4133 flow [2023-11-06 22:18:53,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 92.16666666666667) internal successors, (1106), 12 states have internal predecessors, (1106), 0 states have call successors, (0), 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 22:18:53,986 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:18:53,986 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:18:53,997 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed733aae-4d5c-424b-8d82-99a8b3bc25b3/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-06 22:18:54,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed733aae-4d5c-424b-8d82-99a8b3bc25b3/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-06 22:18:54,192 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 22:18:54,193 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:18:54,193 INFO L85 PathProgramCache]: Analyzing trace with hash 923159628, now seen corresponding path program 7 times [2023-11-06 22:18:54,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:18:54,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979546487] [2023-11-06 22:18:54,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:54,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:18:54,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:54,410 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:18:54,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:18:54,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979546487] [2023-11-06 22:18:54,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979546487] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:18:54,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375154858] [2023-11-06 22:18:54,411 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 22:18:54,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:18:54,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed733aae-4d5c-424b-8d82-99a8b3bc25b3/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:18:54,413 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed733aae-4d5c-424b-8d82-99a8b3bc25b3/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:18:54,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed733aae-4d5c-424b-8d82-99a8b3bc25b3/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 22:18:54,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:54,522 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 22:18:54,524 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:18:54,611 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:18:54,611 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:18:54,696 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:18:54,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375154858] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:18:54,697 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:18:54,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 13 [2023-11-06 22:18:54,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563412647] [2023-11-06 22:18:54,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:18:54,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-06 22:18:54,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:18:54,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-06 22:18:54,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2023-11-06 22:18:54,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 188 [2023-11-06 22:18:54,883 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 275 transitions, 4133 flow. Second operand has 13 states, 13 states have (on average 85.07692307692308) internal successors, (1106), 13 states have internal predecessors, (1106), 0 states have call successors, (0), 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 22:18:54,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:18:54,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 188 [2023-11-06 22:18:54,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:18:57,879 INFO L124 PetriNetUnfolderBase]: 6273/9004 cut-off events. [2023-11-06 22:18:57,879 INFO L125 PetriNetUnfolderBase]: For 117382/117382 co-relation queries the response was YES. [2023-11-06 22:18:57,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60672 conditions, 9004 events. 6273/9004 cut-off events. For 117382/117382 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 46279 event pairs, 602 based on Foata normal form. 158/9162 useless extension candidates. Maximal degree in co-relation 59417. Up to 2869 conditions per place. [2023-11-06 22:18:57,995 INFO L140 encePairwiseOnDemand]: 179/188 looper letters, 584 selfloop transitions, 221 changer transitions 0/805 dead transitions. [2023-11-06 22:18:57,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 805 transitions, 13199 flow [2023-11-06 22:18:58,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-06 22:18:58,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-11-06 22:18:58,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 2808 transitions. [2023-11-06 22:18:58,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48181194234728897 [2023-11-06 22:18:58,022 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 2808 transitions. [2023-11-06 22:18:58,022 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 2808 transitions. [2023-11-06 22:18:58,024 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:18:58,024 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 2808 transitions. [2023-11-06 22:18:58,043 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 90.58064516129032) internal successors, (2808), 31 states have internal predecessors, (2808), 0 states have call successors, (0), 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 22:18:58,055 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 188.0) internal successors, (6016), 32 states have internal predecessors, (6016), 0 states have call successors, (0), 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 22:18:58,057 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 188.0) internal successors, (6016), 32 states have internal predecessors, (6016), 0 states have call successors, (0), 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 22:18:58,057 INFO L175 Difference]: Start difference. First operand has 127 places, 275 transitions, 4133 flow. Second operand 31 states and 2808 transitions. [2023-11-06 22:18:58,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 805 transitions, 13199 flow [2023-11-06 22:18:58,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 805 transitions, 12325 flow, removed 417 selfloop flow, removed 2 redundant places. [2023-11-06 22:18:58,339 INFO L231 Difference]: Finished difference. Result has 181 places, 441 transitions, 7635 flow [2023-11-06 22:18:58,339 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=3773, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=7635, PETRI_PLACES=181, PETRI_TRANSITIONS=441} [2023-11-06 22:18:58,340 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 152 predicate places. [2023-11-06 22:18:58,340 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 441 transitions, 7635 flow [2023-11-06 22:18:58,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 85.07692307692308) internal successors, (1106), 13 states have internal predecessors, (1106), 0 states have call successors, (0), 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 22:18:58,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:18:58,341 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:18:58,347 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed733aae-4d5c-424b-8d82-99a8b3bc25b3/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-06 22:18:58,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed733aae-4d5c-424b-8d82-99a8b3bc25b3/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-06 22:18:58,547 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 22:18:58,547 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:18:58,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1867597092, now seen corresponding path program 8 times [2023-11-06 22:18:58,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:18:58,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328345860] [2023-11-06 22:18:58,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:58,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:18:58,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:58,761 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:18:58,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:18:58,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328345860] [2023-11-06 22:18:58,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328345860] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:18:58,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697056503] [2023-11-06 22:18:58,762 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:18:58,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:18:58,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed733aae-4d5c-424b-8d82-99a8b3bc25b3/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:18:58,764 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed733aae-4d5c-424b-8d82-99a8b3bc25b3/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:18:58,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed733aae-4d5c-424b-8d82-99a8b3bc25b3/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 22:18:58,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:18:58,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:18:58,878 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 22:18:58,880 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:18:58,941 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:18:58,941 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:18:59,045 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:18:59,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697056503] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:18:59,045 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:18:59,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-11-06 22:18:59,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084700464] [2023-11-06 22:18:59,045 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:18:59,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-06 22:18:59,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:18:59,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-06 22:18:59,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2023-11-06 22:18:59,253 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 188 [2023-11-06 22:18:59,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 441 transitions, 7635 flow. Second operand has 16 states, 16 states have (on average 87.1875) internal successors, (1395), 16 states have internal predecessors, (1395), 0 states have call successors, (0), 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 22:18:59,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:18:59,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 188 [2023-11-06 22:18:59,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:19:02,413 INFO L124 PetriNetUnfolderBase]: 7087/10013 cut-off events. [2023-11-06 22:19:02,413 INFO L125 PetriNetUnfolderBase]: For 322628/322926 co-relation queries the response was YES. [2023-11-06 22:19:02,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94442 conditions, 10013 events. 7087/10013 cut-off events. For 322628/322926 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 50756 event pairs, 1731 based on Foata normal form. 241/10163 useless extension candidates. Maximal degree in co-relation 93548. Up to 7513 conditions per place. [2023-11-06 22:19:02,770 INFO L140 encePairwiseOnDemand]: 181/188 looper letters, 531 selfloop transitions, 271 changer transitions 0/816 dead transitions. [2023-11-06 22:19:02,770 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 816 transitions, 15723 flow [2023-11-06 22:19:02,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-06 22:19:02,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-06 22:19:02,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1595 transitions. [2023-11-06 22:19:02,775 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4990613266583229 [2023-11-06 22:19:02,775 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1595 transitions. [2023-11-06 22:19:02,775 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1595 transitions. [2023-11-06 22:19:02,776 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:19:02,776 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1595 transitions. [2023-11-06 22:19:02,780 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 93.82352941176471) internal successors, (1595), 17 states have internal predecessors, (1595), 0 states have call successors, (0), 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 22:19:02,785 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 188.0) internal successors, (3384), 18 states have internal predecessors, (3384), 0 states have call successors, (0), 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 22:19:02,786 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 188.0) internal successors, (3384), 18 states have internal predecessors, (3384), 0 states have call successors, (0), 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 22:19:02,786 INFO L175 Difference]: Start difference. First operand has 181 places, 441 transitions, 7635 flow. Second operand 17 states and 1595 transitions. [2023-11-06 22:19:02,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 816 transitions, 15723 flow [2023-11-06 22:19:03,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 816 transitions, 14195 flow, removed 764 selfloop flow, removed 0 redundant places. [2023-11-06 22:19:03,898 INFO L231 Difference]: Finished difference. Result has 204 places, 616 transitions, 10406 flow [2023-11-06 22:19:03,899 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=6481, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=10406, PETRI_PLACES=204, PETRI_TRANSITIONS=616} [2023-11-06 22:19:03,900 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 175 predicate places. [2023-11-06 22:19:03,900 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 616 transitions, 10406 flow [2023-11-06 22:19:03,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 87.1875) internal successors, (1395), 16 states have internal predecessors, (1395), 0 states have call successors, (0), 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 22:19:03,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:19:03,901 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:19:03,908 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed733aae-4d5c-424b-8d82-99a8b3bc25b3/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-06 22:19:04,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed733aae-4d5c-424b-8d82-99a8b3bc25b3/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:19:04,107 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 22:19:04,107 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:19:04,107 INFO L85 PathProgramCache]: Analyzing trace with hash 1737729338, now seen corresponding path program 9 times [2023-11-06 22:19:04,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:19:04,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665418409] [2023-11-06 22:19:04,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:19:04,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:19:04,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:19:04,344 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:19:04,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:19:04,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665418409] [2023-11-06 22:19:04,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665418409] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:19:04,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829560194] [2023-11-06 22:19:04,345 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:19:04,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:19:04,345 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed733aae-4d5c-424b-8d82-99a8b3bc25b3/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:19:04,346 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed733aae-4d5c-424b-8d82-99a8b3bc25b3/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:19:04,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed733aae-4d5c-424b-8d82-99a8b3bc25b3/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-06 22:19:04,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-06 22:19:04,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:19:04,460 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 22:19:04,461 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:19:04,523 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:19:04,523 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:19:04,617 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:19:04,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829560194] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:19:04,618 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:19:04,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 17 [2023-11-06 22:19:04,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881530003] [2023-11-06 22:19:04,618 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:19:04,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-06 22:19:04,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:19:04,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-06 22:19:04,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2023-11-06 22:19:04,829 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 188 [2023-11-06 22:19:04,830 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 616 transitions, 10406 flow. Second operand has 17 states, 17 states have (on average 84.11764705882354) internal successors, (1430), 17 states have internal predecessors, (1430), 0 states have call successors, (0), 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 22:19:04,831 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:19:04,831 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 188 [2023-11-06 22:19:04,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:19:09,810 INFO L124 PetriNetUnfolderBase]: 9904/13671 cut-off events. [2023-11-06 22:19:09,810 INFO L125 PetriNetUnfolderBase]: For 480502/480502 co-relation queries the response was YES. [2023-11-06 22:19:09,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139077 conditions, 13671 events. 9904/13671 cut-off events. For 480502/480502 co-relation queries the response was YES. Maximal size of possible extension queue 575. Compared 68699 event pairs, 1295 based on Foata normal form. 148/13819 useless extension candidates. Maximal degree in co-relation 137961. Up to 7461 conditions per place. [2023-11-06 22:19:10,014 INFO L140 encePairwiseOnDemand]: 180/188 looper letters, 739 selfloop transitions, 735 changer transitions 0/1474 dead transitions. [2023-11-06 22:19:10,014 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 1474 transitions, 30149 flow [2023-11-06 22:19:10,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-06 22:19:10,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-11-06 22:19:10,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 2886 transitions. [2023-11-06 22:19:10,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4797207446808511 [2023-11-06 22:19:10,022 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 2886 transitions. [2023-11-06 22:19:10,022 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 2886 transitions. [2023-11-06 22:19:10,024 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:19:10,025 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 2886 transitions. [2023-11-06 22:19:10,032 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 90.1875) internal successors, (2886), 32 states have internal predecessors, (2886), 0 states have call successors, (0), 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 22:19:10,043 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 188.0) internal successors, (6204), 33 states have internal predecessors, (6204), 0 states have call successors, (0), 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 22:19:10,045 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 188.0) internal successors, (6204), 33 states have internal predecessors, (6204), 0 states have call successors, (0), 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 22:19:10,045 INFO L175 Difference]: Start difference. First operand has 204 places, 616 transitions, 10406 flow. Second operand 32 states and 2886 transitions. [2023-11-06 22:19:10,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 1474 transitions, 30149 flow [2023-11-06 22:19:13,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 1474 transitions, 27529 flow, removed 1118 selfloop flow, removed 3 redundant places. [2023-11-06 22:19:13,628 INFO L231 Difference]: Finished difference. Result has 242 places, 1117 transitions, 22014 flow [2023-11-06 22:19:13,629 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=9572, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=616, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=319, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=22014, PETRI_PLACES=242, PETRI_TRANSITIONS=1117} [2023-11-06 22:19:13,629 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 213 predicate places. [2023-11-06 22:19:13,629 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 1117 transitions, 22014 flow [2023-11-06 22:19:13,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 84.11764705882354) internal successors, (1430), 17 states have internal predecessors, (1430), 0 states have call successors, (0), 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 22:19:13,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:19:13,630 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:19:13,636 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed733aae-4d5c-424b-8d82-99a8b3bc25b3/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-06 22:19:13,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed733aae-4d5c-424b-8d82-99a8b3bc25b3/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:19:13,835 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 22:19:13,836 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:19:13,836 INFO L85 PathProgramCache]: Analyzing trace with hash 2040642534, now seen corresponding path program 10 times [2023-11-06 22:19:13,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:19:13,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089602625] [2023-11-06 22:19:13,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:19:13,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:19:13,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:19:14,033 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:19:14,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:19:14,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089602625] [2023-11-06 22:19:14,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089602625] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:19:14,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454682949] [2023-11-06 22:19:14,034 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:19:14,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:19:14,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed733aae-4d5c-424b-8d82-99a8b3bc25b3/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:19:14,036 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed733aae-4d5c-424b-8d82-99a8b3bc25b3/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:19:14,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed733aae-4d5c-424b-8d82-99a8b3bc25b3/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-06 22:19:14,144 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:19:14,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:19:14,146 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 22:19:14,148 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:19:14,233 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:19:14,234 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:19:14,362 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:19:14,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454682949] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:19:14,362 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:19:14,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 16 [2023-11-06 22:19:14,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201919747] [2023-11-06 22:19:14,362 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:19:14,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-06 22:19:14,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:19:14,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-06 22:19:14,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2023-11-06 22:19:14,592 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 188 [2023-11-06 22:19:14,594 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 1117 transitions, 22014 flow. Second operand has 16 states, 16 states have (on average 85.1875) internal successors, (1363), 16 states have internal predecessors, (1363), 0 states have call successors, (0), 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 22:19:14,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:19:14,595 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 188 [2023-11-06 22:19:14,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:19:23,455 INFO L124 PetriNetUnfolderBase]: 12517/17398 cut-off events. [2023-11-06 22:19:23,455 INFO L125 PetriNetUnfolderBase]: For 667580/667580 co-relation queries the response was YES. [2023-11-06 22:19:23,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 186929 conditions, 17398 events. 12517/17398 cut-off events. For 667580/667580 co-relation queries the response was YES. Maximal size of possible extension queue 772. Compared 92877 event pairs, 1090 based on Foata normal form. 648/18046 useless extension candidates. Maximal degree in co-relation 185672. Up to 5647 conditions per place. [2023-11-06 22:19:23,736 INFO L140 encePairwiseOnDemand]: 179/188 looper letters, 993 selfloop transitions, 1084 changer transitions 166/2243 dead transitions. [2023-11-06 22:19:23,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 2243 transitions, 49894 flow [2023-11-06 22:19:23,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2023-11-06 22:19:23,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2023-11-06 22:19:23,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 5637 transitions. [2023-11-06 22:19:23,749 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4759371833839919 [2023-11-06 22:19:23,749 INFO L72 ComplementDD]: Start complementDD. Operand 63 states and 5637 transitions. [2023-11-06 22:19:23,749 INFO L73 IsDeterministic]: Start isDeterministic. Operand 63 states and 5637 transitions. [2023-11-06 22:19:23,752 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:19:23,753 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 63 states and 5637 transitions. [2023-11-06 22:19:23,765 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 64 states, 63 states have (on average 89.47619047619048) internal successors, (5637), 63 states have internal predecessors, (5637), 0 states have call successors, (0), 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 22:19:23,784 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 64 states, 64 states have (on average 188.0) internal successors, (12032), 64 states have internal predecessors, (12032), 0 states have call successors, (0), 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 22:19:23,787 INFO L81 ComplementDD]: Finished complementDD. Result has 64 states, 64 states have (on average 188.0) internal successors, (12032), 64 states have internal predecessors, (12032), 0 states have call successors, (0), 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 22:19:23,787 INFO L175 Difference]: Start difference. First operand has 242 places, 1117 transitions, 22014 flow. Second operand 63 states and 5637 transitions. [2023-11-06 22:19:23,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 2243 transitions, 49894 flow [2023-11-06 22:19:34,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 2243 transitions, 41568 flow, removed 3924 selfloop flow, removed 3 redundant places. [2023-11-06 22:19:34,419 INFO L231 Difference]: Finished difference. Result has 335 places, 1711 transitions, 33600 flow [2023-11-06 22:19:34,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=17712, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=557, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=500, PETRI_DIFFERENCE_SUBTRAHEND_STATES=63, PETRI_FLOW=33600, PETRI_PLACES=335, PETRI_TRANSITIONS=1711} [2023-11-06 22:19:34,420 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 306 predicate places. [2023-11-06 22:19:34,420 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 1711 transitions, 33600 flow [2023-11-06 22:19:34,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 85.1875) internal successors, (1363), 16 states have internal predecessors, (1363), 0 states have call successors, (0), 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 22:19:34,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:19:34,421 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:19:34,430 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed733aae-4d5c-424b-8d82-99a8b3bc25b3/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-06 22:19:34,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed733aae-4d5c-424b-8d82-99a8b3bc25b3/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:19:34,626 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 22:19:34,627 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:19:34,627 INFO L85 PathProgramCache]: Analyzing trace with hash 994913706, now seen corresponding path program 11 times [2023-11-06 22:19:34,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:19:34,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789784032] [2023-11-06 22:19:34,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:19:34,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:19:34,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:19:34,829 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:19:34,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:19:34,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789784032] [2023-11-06 22:19:34,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789784032] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:19:34,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530406025] [2023-11-06 22:19:34,830 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:19:34,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:19:34,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed733aae-4d5c-424b-8d82-99a8b3bc25b3/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:19:34,832 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed733aae-4d5c-424b-8d82-99a8b3bc25b3/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:19:34,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed733aae-4d5c-424b-8d82-99a8b3bc25b3/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-06 22:19:34,934 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-06 22:19:34,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:19:34,935 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 22:19:34,937 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:19:35,002 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:19:35,002 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:19:35,092 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:19:35,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530406025] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:19:35,092 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:19:35,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-11-06 22:19:35,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281369779] [2023-11-06 22:19:35,092 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:19:35,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-06 22:19:35,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:19:35,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-06 22:19:35,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2023-11-06 22:19:35,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 188 [2023-11-06 22:19:35,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 1711 transitions, 33600 flow. Second operand has 16 states, 16 states have (on average 87.1875) internal successors, (1395), 16 states have internal predecessors, (1395), 0 states have call successors, (0), 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 22:19:35,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:19:35,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 188 [2023-11-06 22:19:35,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:19:45,636 INFO L124 PetriNetUnfolderBase]: 13655/18792 cut-off events. [2023-11-06 22:19:45,636 INFO L125 PetriNetUnfolderBase]: For 577429/577531 co-relation queries the response was YES. [2023-11-06 22:19:45,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 199116 conditions, 18792 events. 13655/18792 cut-off events. For 577429/577531 co-relation queries the response was YES. Maximal size of possible extension queue 861. Compared 99647 event pairs, 2070 based on Foata normal form. 357/19093 useless extension candidates. Maximal degree in co-relation 198787. Up to 13170 conditions per place. [2023-11-06 22:19:46,006 INFO L140 encePairwiseOnDemand]: 181/188 looper letters, 1413 selfloop transitions, 915 changer transitions 27/2382 dead transitions. [2023-11-06 22:19:46,007 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 2382 transitions, 53147 flow [2023-11-06 22:19:46,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-06 22:19:46,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-06 22:19:46,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1573 transitions. [2023-11-06 22:19:46,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49217772215269084 [2023-11-06 22:19:46,011 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1573 transitions. [2023-11-06 22:19:46,011 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1573 transitions. [2023-11-06 22:19:46,011 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:19:46,012 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1573 transitions. [2023-11-06 22:19:46,014 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 92.52941176470588) internal successors, (1573), 17 states have internal predecessors, (1573), 0 states have call successors, (0), 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 22:19:46,018 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 188.0) internal successors, (3384), 18 states have internal predecessors, (3384), 0 states have call successors, (0), 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 22:19:46,019 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 188.0) internal successors, (3384), 18 states have internal predecessors, (3384), 0 states have call successors, (0), 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 22:19:46,019 INFO L175 Difference]: Start difference. First operand has 335 places, 1711 transitions, 33600 flow. Second operand 17 states and 1573 transitions. [2023-11-06 22:19:46,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 2382 transitions, 53147 flow [2023-11-06 22:19:56,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 2382 transitions, 44800 flow, removed 3868 selfloop flow, removed 8 redundant places. [2023-11-06 22:19:56,871 INFO L231 Difference]: Finished difference. Result has 344 places, 2024 transitions, 36255 flow [2023-11-06 22:19:56,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=27287, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1701, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=634, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1008, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=36255, PETRI_PLACES=344, PETRI_TRANSITIONS=2024} [2023-11-06 22:19:56,873 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 315 predicate places. [2023-11-06 22:19:56,873 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 2024 transitions, 36255 flow [2023-11-06 22:19:56,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 87.1875) internal successors, (1395), 16 states have internal predecessors, (1395), 0 states have call successors, (0), 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 22:19:56,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:19:56,874 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:19:56,888 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed733aae-4d5c-424b-8d82-99a8b3bc25b3/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-06 22:19:57,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed733aae-4d5c-424b-8d82-99a8b3bc25b3/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:19:57,088 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 22:19:57,089 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:19:57,089 INFO L85 PathProgramCache]: Analyzing trace with hash 137029922, now seen corresponding path program 12 times [2023-11-06 22:19:57,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:19:57,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821486835] [2023-11-06 22:19:57,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:19:57,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:19:57,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:19:57,247 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:19:57,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:19:57,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821486835] [2023-11-06 22:19:57,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821486835] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:19:57,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403853178] [2023-11-06 22:19:57,248 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:19:57,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:19:57,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed733aae-4d5c-424b-8d82-99a8b3bc25b3/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:19:57,252 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed733aae-4d5c-424b-8d82-99a8b3bc25b3/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:19:57,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed733aae-4d5c-424b-8d82-99a8b3bc25b3/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-06 22:19:57,371 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-06 22:19:57,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:19:57,372 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 22:19:57,374 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:19:57,454 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:19:57,454 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:19:57,555 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:19:57,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403853178] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:19:57,555 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:19:57,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-11-06 22:19:57,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363782630] [2023-11-06 22:19:57,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:19:57,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-06 22:19:57,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:19:57,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-06 22:19:57,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2023-11-06 22:19:57,782 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 188 [2023-11-06 22:19:57,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 2024 transitions, 36255 flow. Second operand has 16 states, 16 states have (on average 84.0625) internal successors, (1345), 16 states have internal predecessors, (1345), 0 states have call successors, (0), 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 22:19:57,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:19:57,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 188 [2023-11-06 22:19:57,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:20:11,419 INFO L124 PetriNetUnfolderBase]: 15162/20747 cut-off events. [2023-11-06 22:20:11,419 INFO L125 PetriNetUnfolderBase]: For 555264/555264 co-relation queries the response was YES. [2023-11-06 22:20:11,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 217718 conditions, 20747 events. 15162/20747 cut-off events. For 555264/555264 co-relation queries the response was YES. Maximal size of possible extension queue 950. Compared 109582 event pairs, 312 based on Foata normal form. 596/21319 useless extension candidates. Maximal degree in co-relation 216952. Up to 6451 conditions per place. [2023-11-06 22:20:11,851 INFO L140 encePairwiseOnDemand]: 179/188 looper letters, 1631 selfloop transitions, 1137 changer transitions 134/2902 dead transitions. [2023-11-06 22:20:11,851 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 2902 transitions, 60448 flow [2023-11-06 22:20:11,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-11-06 22:20:11,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2023-11-06 22:20:11,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 3764 transitions. [2023-11-06 22:20:11,858 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4766970618034448 [2023-11-06 22:20:11,858 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 3764 transitions. [2023-11-06 22:20:11,858 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 3764 transitions. [2023-11-06 22:20:11,860 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:20:11,860 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 3764 transitions. [2023-11-06 22:20:11,866 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 89.61904761904762) internal successors, (3764), 42 states have internal predecessors, (3764), 0 states have call successors, (0), 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 22:20:11,876 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 188.0) internal successors, (8084), 43 states have internal predecessors, (8084), 0 states have call successors, (0), 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 22:20:11,878 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 188.0) internal successors, (8084), 43 states have internal predecessors, (8084), 0 states have call successors, (0), 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 22:20:11,878 INFO L175 Difference]: Start difference. First operand has 344 places, 2024 transitions, 36255 flow. Second operand 42 states and 3764 transitions. [2023-11-06 22:20:11,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 2902 transitions, 60448 flow [2023-11-06 22:20:22,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 2902 transitions, 57314 flow, removed 1427 selfloop flow, removed 5 redundant places. [2023-11-06 22:20:22,801 INFO L231 Difference]: Finished difference. Result has 401 places, 2161 transitions, 42713 flow [2023-11-06 22:20:22,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=32666, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1940, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=809, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1073, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=42713, PETRI_PLACES=401, PETRI_TRANSITIONS=2161} [2023-11-06 22:20:22,804 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 372 predicate places. [2023-11-06 22:20:22,804 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 2161 transitions, 42713 flow [2023-11-06 22:20:22,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 84.0625) internal successors, (1345), 16 states have internal predecessors, (1345), 0 states have call successors, (0), 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 22:20:22,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:20:22,805 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:20:22,810 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed733aae-4d5c-424b-8d82-99a8b3bc25b3/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-06 22:20:23,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed733aae-4d5c-424b-8d82-99a8b3bc25b3/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:20:23,010 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 22:20:23,010 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:20:23,010 INFO L85 PathProgramCache]: Analyzing trace with hash 296337280, now seen corresponding path program 13 times [2023-11-06 22:20:23,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:20:23,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012970632] [2023-11-06 22:20:23,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:20:23,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:20:23,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:20:23,174 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:20:23,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:20:23,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012970632] [2023-11-06 22:20:23,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012970632] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:20:23,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477012201] [2023-11-06 22:20:23,175 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 22:20:23,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:20:23,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed733aae-4d5c-424b-8d82-99a8b3bc25b3/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:20:23,177 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed733aae-4d5c-424b-8d82-99a8b3bc25b3/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:20:23,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed733aae-4d5c-424b-8d82-99a8b3bc25b3/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-06 22:20:23,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:20:23,280 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 22:20:23,281 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:20:23,354 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:20:23,354 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:20:23,440 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:20:23,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477012201] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:20:23,440 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:20:23,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2023-11-06 22:20:23,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802392867] [2023-11-06 22:20:23,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:20:23,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-06 22:20:23,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:20:23,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-06 22:20:23,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2023-11-06 22:20:23,696 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 188 [2023-11-06 22:20:23,697 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 2161 transitions, 42713 flow. Second operand has 15 states, 15 states have (on average 83.86666666666666) internal successors, (1258), 15 states have internal predecessors, (1258), 0 states have call successors, (0), 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 22:20:23,698 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:20:23,698 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 188 [2023-11-06 22:20:23,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:20:44,647 INFO L124 PetriNetUnfolderBase]: 19756/27073 cut-off events. [2023-11-06 22:20:44,647 INFO L125 PetriNetUnfolderBase]: For 993305/993305 co-relation queries the response was YES. [2023-11-06 22:20:45,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 303794 conditions, 27073 events. 19756/27073 cut-off events. For 993305/993305 co-relation queries the response was YES. Maximal size of possible extension queue 1305. Compared 149279 event pairs, 1040 based on Foata normal form. 1014/28087 useless extension candidates. Maximal degree in co-relation 302983. Up to 8773 conditions per place. [2023-11-06 22:20:45,526 INFO L140 encePairwiseOnDemand]: 179/188 looper letters, 2149 selfloop transitions, 2002 changer transitions 32/4183 dead transitions. [2023-11-06 22:20:45,526 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 463 places, 4183 transitions, 96032 flow [2023-11-06 22:20:45,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2023-11-06 22:20:45,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2023-11-06 22:20:45,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 6276 transitions. [2023-11-06 22:20:45,535 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4701827989211867 [2023-11-06 22:20:45,536 INFO L72 ComplementDD]: Start complementDD. Operand 71 states and 6276 transitions. [2023-11-06 22:20:45,536 INFO L73 IsDeterministic]: Start isDeterministic. Operand 71 states and 6276 transitions. [2023-11-06 22:20:45,538 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:20:45,539 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 71 states and 6276 transitions. [2023-11-06 22:20:45,548 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 72 states, 71 states have (on average 88.3943661971831) internal successors, (6276), 71 states have internal predecessors, (6276), 0 states have call successors, (0), 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 22:20:45,561 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 72 states, 72 states have (on average 188.0) internal successors, (13536), 72 states have internal predecessors, (13536), 0 states have call successors, (0), 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 22:20:45,563 INFO L81 ComplementDD]: Finished complementDD. Result has 72 states, 72 states have (on average 188.0) internal successors, (13536), 72 states have internal predecessors, (13536), 0 states have call successors, (0), 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 22:20:45,564 INFO L175 Difference]: Start difference. First operand has 401 places, 2161 transitions, 42713 flow. Second operand 71 states and 6276 transitions. [2023-11-06 22:20:45,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 463 places, 4183 transitions, 96032 flow [2023-11-06 22:21:02,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 445 places, 4183 transitions, 90502 flow, removed 1776 selfloop flow, removed 18 redundant places. [2023-11-06 22:21:02,344 INFO L231 Difference]: Finished difference. Result has 480 places, 3120 transitions, 69607 flow [2023-11-06 22:21:02,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=39215, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=900, PETRI_DIFFERENCE_SUBTRAHEND_STATES=71, PETRI_FLOW=69607, PETRI_PLACES=480, PETRI_TRANSITIONS=3120} [2023-11-06 22:21:02,347 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 451 predicate places. [2023-11-06 22:21:02,348 INFO L495 AbstractCegarLoop]: Abstraction has has 480 places, 3120 transitions, 69607 flow [2023-11-06 22:21:02,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 83.86666666666666) internal successors, (1258), 15 states have internal predecessors, (1258), 0 states have call successors, (0), 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 22:21:02,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:21:02,348 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:21:02,360 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed733aae-4d5c-424b-8d82-99a8b3bc25b3/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-06 22:21:02,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed733aae-4d5c-424b-8d82-99a8b3bc25b3/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-06 22:21:02,560 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 22:21:02,560 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:21:02,561 INFO L85 PathProgramCache]: Analyzing trace with hash -862873792, now seen corresponding path program 14 times [2023-11-06 22:21:02,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:21:02,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556734452] [2023-11-06 22:21:02,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:21:02,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:21:02,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:21:02,732 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:21:02,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:21:02,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556734452] [2023-11-06 22:21:02,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556734452] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:21:02,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176992595] [2023-11-06 22:21:02,733 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:21:02,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:21:02,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed733aae-4d5c-424b-8d82-99a8b3bc25b3/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:21:02,735 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed733aae-4d5c-424b-8d82-99a8b3bc25b3/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:21:02,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed733aae-4d5c-424b-8d82-99a8b3bc25b3/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-06 22:21:02,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:21:02,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:21:02,850 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 22:21:02,851 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:21:02,917 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:21:02,917 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:21:03,004 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:21:03,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176992595] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:21:03,004 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:21:03,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2023-11-06 22:21:03,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640639255] [2023-11-06 22:21:03,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:21:03,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-06 22:21:03,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:21:03,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-06 22:21:03,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2023-11-06 22:21:03,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 188 [2023-11-06 22:21:03,135 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 480 places, 3120 transitions, 69607 flow. Second operand has 15 states, 15 states have (on average 87.26666666666667) internal successors, (1309), 15 states have internal predecessors, (1309), 0 states have call successors, (0), 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 22:21:03,136 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:21:03,136 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 188 [2023-11-06 22:21:03,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand