./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr.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_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/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_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/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_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/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 c17307c3ae663be4a153b702602dea6d5ee45f14a080e7a1fb720e97140b770f --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:09:17,723 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:09:17,818 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 22:09:17,832 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:09:17,833 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:09:17,870 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:09:17,871 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:09:17,872 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:09:17,873 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:09:17,878 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:09:17,879 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:09:17,879 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:09:17,880 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:09:17,882 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:09:17,882 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 22:09:17,883 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:09:17,883 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:09:17,884 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:09:17,884 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:09:17,884 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 22:09:17,885 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:09:17,886 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 22:09:17,886 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:09:17,886 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 22:09:17,887 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:09:17,888 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:09:17,888 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:09:17,889 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:09:17,889 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:09:17,890 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:09:17,891 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:09:17,892 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 22:09:17,892 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:09:17,892 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:09:17,892 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:09:17,893 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 22:09:17,893 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:09:17,893 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:09:17,894 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:09:17,894 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_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c17307c3ae663be4a153b702602dea6d5ee45f14a080e7a1fb720e97140b770f [2023-11-06 22:09:18,210 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:09:18,250 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:09:18,253 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:09:18,255 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:09:18,255 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:09:18,257 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c [2023-11-06 22:09:21,309 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:09:21,492 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:09:21,493 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c [2023-11-06 22:09:21,503 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/data/557580359/91403da493c540c5ad725f71da7f6ddc/FLAGa08765af8 [2023-11-06 22:09:21,522 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/data/557580359/91403da493c540c5ad725f71da7f6ddc [2023-11-06 22:09:21,530 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:09:21,532 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:09:21,536 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:09:21,536 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:09:21,541 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:09:21,542 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:09:21" (1/1) ... [2023-11-06 22:09:21,543 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c441fea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:09:21, skipping insertion in model container [2023-11-06 22:09:21,543 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:09:21" (1/1) ... [2023-11-06 22:09:21,572 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:09:21,775 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_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c[2037,2050] [2023-11-06 22:09:21,780 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:09:21,790 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:09:21,813 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_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c[2037,2050] [2023-11-06 22:09:21,814 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:09:21,822 WARN L672 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 22:09:21,822 WARN L672 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 22:09:21,830 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:09:21,831 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:09:21 WrapperNode [2023-11-06 22:09:21,831 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:09:21,832 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:09:21,833 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:09:21,833 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:09:21,841 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:09:21" (1/1) ... [2023-11-06 22:09:21,850 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:09:21" (1/1) ... [2023-11-06 22:09:21,869 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 53 [2023-11-06 22:09:21,869 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:09:21,870 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:09:21,870 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:09:21,870 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:09:21,880 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:09:21" (1/1) ... [2023-11-06 22:09:21,880 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:09:21" (1/1) ... [2023-11-06 22:09:21,883 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:09:21" (1/1) ... [2023-11-06 22:09:21,883 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:09:21" (1/1) ... [2023-11-06 22:09:21,888 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:09:21" (1/1) ... [2023-11-06 22:09:21,891 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:09:21" (1/1) ... [2023-11-06 22:09:21,893 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:09:21" (1/1) ... [2023-11-06 22:09:21,894 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:09:21" (1/1) ... [2023-11-06 22:09:21,896 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:09:21,897 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:09:21,898 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:09:21,898 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:09:21,899 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:09:21" (1/1) ... [2023-11-06 22:09:21,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:09:21,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:09:21,931 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:09:21,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:09:21,979 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:09:21,980 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-06 22:09:21,980 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-06 22:09:21,980 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-06 22:09:21,980 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-06 22:09:21,981 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:09:21,981 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 22:09:21,981 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 22:09:21,981 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-06 22:09:21,982 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-06 22:09:21,982 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:09:21,982 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:09:21,982 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 22:09:21,983 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 22:09:21,985 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 22:09:22,076 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:09:22,078 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:09:22,282 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:09:22,329 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:09:22,330 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-06 22:09:22,333 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:09:22 BoogieIcfgContainer [2023-11-06 22:09:22,333 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:09:22,336 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:09:22,336 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:09:22,340 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:09:22,340 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:09:21" (1/3) ... [2023-11-06 22:09:22,341 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50e2b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:09:22, skipping insertion in model container [2023-11-06 22:09:22,341 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:09:21" (2/3) ... [2023-11-06 22:09:22,342 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50e2b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:09:22, skipping insertion in model container [2023-11-06 22:09:22,342 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:09:22" (3/3) ... [2023-11-06 22:09:22,344 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-nonblocking-cntr.wvr.c [2023-11-06 22:09:22,372 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-06 22:09:22,383 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:09:22,384 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 22:09:22,384 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 22:09:22,455 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-06 22:09:22,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 81 places, 80 transitions, 174 flow [2023-11-06 22:09:22,552 INFO L124 PetriNetUnfolderBase]: 6/78 cut-off events. [2023-11-06 22:09:22,553 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 22:09:22,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87 conditions, 78 events. 6/78 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 48 event pairs, 0 based on Foata normal form. 0/71 useless extension candidates. Maximal degree in co-relation 46. Up to 2 conditions per place. [2023-11-06 22:09:22,558 INFO L82 GeneralOperation]: Start removeDead. Operand has 81 places, 80 transitions, 174 flow [2023-11-06 22:09:22,563 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 70 places, 69 transitions, 150 flow [2023-11-06 22:09:22,567 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:09:22,578 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 70 places, 69 transitions, 150 flow [2023-11-06 22:09:22,581 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 70 places, 69 transitions, 150 flow [2023-11-06 22:09:22,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 70 places, 69 transitions, 150 flow [2023-11-06 22:09:22,608 INFO L124 PetriNetUnfolderBase]: 6/69 cut-off events. [2023-11-06 22:09:22,608 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 22:09:22,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78 conditions, 69 events. 6/69 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 45 event pairs, 0 based on Foata normal form. 0/63 useless extension candidates. Maximal degree in co-relation 46. Up to 2 conditions per place. [2023-11-06 22:09:22,611 INFO L119 LiptonReduction]: Number of co-enabled transitions 436 [2023-11-06 22:09:25,045 INFO L134 LiptonReduction]: Checked pairs total: 442 [2023-11-06 22:09:25,046 INFO L136 LiptonReduction]: Total number of compositions: 63 [2023-11-06 22:09:25,061 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:09:25,069 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;@465fd4ac, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:09:25,069 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-06 22:09:25,083 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:09:25,084 INFO L124 PetriNetUnfolderBase]: 2/14 cut-off events. [2023-11-06 22:09:25,084 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 22:09:25,084 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:09:25,085 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:09:25,086 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:09:25,092 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:09:25,092 INFO L85 PathProgramCache]: Analyzing trace with hash 657223208, now seen corresponding path program 1 times [2023-11-06 22:09:25,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:09:25,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913218367] [2023-11-06 22:09:25,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:09:25,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:09:25,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:09:25,458 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 22:09:25,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:09:25,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913218367] [2023-11-06 22:09:25,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913218367] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:09:25,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:09:25,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:09:25,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222308250] [2023-11-06 22:09:25,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:09:25,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:09:25,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:09:25,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:09:25,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:09:25,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 143 [2023-11-06 22:09:25,540 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 42 flow. Second operand has 4 states, 4 states have (on average 68.0) internal successors, (272), 4 states have internal predecessors, (272), 0 states have call successors, (0), 0 states 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 22:09:25,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:09:25,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 143 [2023-11-06 22:09:25,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:09:25,640 INFO L124 PetriNetUnfolderBase]: 59/100 cut-off events. [2023-11-06 22:09:25,641 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2023-11-06 22:09:25,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 216 conditions, 100 events. 59/100 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 252 event pairs, 23 based on Foata normal form. 0/73 useless extension candidates. Maximal degree in co-relation 165. Up to 78 conditions per place. [2023-11-06 22:09:25,644 INFO L140 encePairwiseOnDemand]: 139/143 looper letters, 17 selfloop transitions, 3 changer transitions 0/21 dead transitions. [2023-11-06 22:09:25,646 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 21 transitions, 97 flow [2023-11-06 22:09:25,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:09:25,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 22:09:25,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 281 transitions. [2023-11-06 22:09:25,662 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49125874125874125 [2023-11-06 22:09:25,662 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 281 transitions. [2023-11-06 22:09:25,663 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 281 transitions. [2023-11-06 22:09:25,665 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:09:25,668 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 281 transitions. [2023-11-06 22:09:25,680 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 70.25) internal successors, (281), 4 states have internal predecessors, (281), 0 states have call successors, (0), 0 states 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 22:09:25,691 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 143.0) internal successors, (715), 5 states have internal predecessors, (715), 0 states have call successors, (0), 0 states 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 22:09:25,695 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 143.0) internal successors, (715), 5 states have internal predecessors, (715), 0 states have call successors, (0), 0 states 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 22:09:25,698 INFO L175 Difference]: Start difference. First operand has 20 places, 15 transitions, 42 flow. Second operand 4 states and 281 transitions. [2023-11-06 22:09:25,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 21 transitions, 97 flow [2023-11-06 22:09:25,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 21 transitions, 87 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-06 22:09:25,703 INFO L231 Difference]: Finished difference. Result has 20 places, 16 transitions, 48 flow [2023-11-06 22:09:25,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=143, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=48, PETRI_PLACES=20, PETRI_TRANSITIONS=16} [2023-11-06 22:09:25,710 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 0 predicate places. [2023-11-06 22:09:25,710 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 16 transitions, 48 flow [2023-11-06 22:09:25,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 68.0) internal successors, (272), 4 states have internal predecessors, (272), 0 states have call successors, (0), 0 states 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 22:09:25,711 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:09:25,711 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:09:25,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 22:09:25,712 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:09:25,713 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:09:25,713 INFO L85 PathProgramCache]: Analyzing trace with hash -553278007, now seen corresponding path program 1 times [2023-11-06 22:09:25,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:09:25,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233072813] [2023-11-06 22:09:25,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:09:25,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:09:25,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:09:25,842 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:09:25,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:09:25,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233072813] [2023-11-06 22:09:25,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233072813] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:09:25,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:09:25,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:09:25,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753103987] [2023-11-06 22:09:25,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:09:25,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:09:25,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:09:25,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:09:25,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:09:25,882 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 143 [2023-11-06 22:09:25,883 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 16 transitions, 48 flow. Second operand has 4 states, 4 states have (on average 66.25) internal successors, (265), 4 states have internal predecessors, (265), 0 states have call successors, (0), 0 states 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 22:09:25,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:09:25,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 143 [2023-11-06 22:09:25,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:09:25,940 INFO L124 PetriNetUnfolderBase]: 51/94 cut-off events. [2023-11-06 22:09:25,940 INFO L125 PetriNetUnfolderBase]: For 16/22 co-relation queries the response was YES. [2023-11-06 22:09:25,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 238 conditions, 94 events. 51/94 cut-off events. For 16/22 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 222 event pairs, 16 based on Foata normal form. 6/81 useless extension candidates. Maximal degree in co-relation 86. Up to 73 conditions per place. [2023-11-06 22:09:25,942 INFO L140 encePairwiseOnDemand]: 139/143 looper letters, 19 selfloop transitions, 3 changer transitions 0/23 dead transitions. [2023-11-06 22:09:25,942 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 23 transitions, 114 flow [2023-11-06 22:09:25,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:09:25,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 22:09:25,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 273 transitions. [2023-11-06 22:09:25,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2023-11-06 22:09:25,946 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 273 transitions. [2023-11-06 22:09:25,946 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 273 transitions. [2023-11-06 22:09:25,947 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:09:25,947 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 273 transitions. [2023-11-06 22:09:25,948 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 68.25) internal successors, (273), 4 states have internal predecessors, (273), 0 states have call successors, (0), 0 states 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 22:09:25,951 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 143.0) internal successors, (715), 5 states have internal predecessors, (715), 0 states have call successors, (0), 0 states 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 22:09:25,952 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 143.0) internal successors, (715), 5 states have internal predecessors, (715), 0 states have call successors, (0), 0 states 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 22:09:25,952 INFO L175 Difference]: Start difference. First operand has 20 places, 16 transitions, 48 flow. Second operand 4 states and 273 transitions. [2023-11-06 22:09:25,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 23 transitions, 114 flow [2023-11-06 22:09:25,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 23 transitions, 105 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-11-06 22:09:25,954 INFO L231 Difference]: Finished difference. Result has 22 places, 17 transitions, 56 flow [2023-11-06 22:09:25,954 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=143, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=56, PETRI_PLACES=22, PETRI_TRANSITIONS=17} [2023-11-06 22:09:25,955 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 2 predicate places. [2023-11-06 22:09:25,955 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 17 transitions, 56 flow [2023-11-06 22:09:25,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 66.25) internal successors, (265), 4 states have internal predecessors, (265), 0 states have call successors, (0), 0 states 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 22:09:25,956 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:09:25,956 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:09:25,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 22:09:25,956 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:09:25,957 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:09:25,957 INFO L85 PathProgramCache]: Analyzing trace with hash -308842732, now seen corresponding path program 1 times [2023-11-06 22:09:25,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:09:25,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082688939] [2023-11-06 22:09:25,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:09:25,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:09:25,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:09:26,187 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 22:09:26,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:09:26,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082688939] [2023-11-06 22:09:26,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082688939] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:09:26,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135502916] [2023-11-06 22:09:26,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:09:26,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:09:26,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:09:26,195 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:09:26,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 22:09:26,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:09:26,309 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-06 22:09:26,315 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:09:26,479 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 22:09:26,491 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:09:26,695 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 22:09:26,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135502916] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:09:26,695 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:09:26,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2023-11-06 22:09:26,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628169123] [2023-11-06 22:09:26,696 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:09:26,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 22:09:26,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:09:26,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 22:09:26,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2023-11-06 22:09:26,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 143 [2023-11-06 22:09:26,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 17 transitions, 56 flow. Second operand has 10 states, 10 states have (on average 66.0) internal successors, (660), 10 states have internal predecessors, (660), 0 states have call successors, (0), 0 states 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 22:09:26,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:09:26,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 143 [2023-11-06 22:09:26,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:09:26,917 INFO L124 PetriNetUnfolderBase]: 64/116 cut-off events. [2023-11-06 22:09:26,918 INFO L125 PetriNetUnfolderBase]: For 32/39 co-relation queries the response was YES. [2023-11-06 22:09:26,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 314 conditions, 116 events. 64/116 cut-off events. For 32/39 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 264 event pairs, 12 based on Foata normal form. 7/103 useless extension candidates. Maximal degree in co-relation 90. Up to 83 conditions per place. [2023-11-06 22:09:26,920 INFO L140 encePairwiseOnDemand]: 138/143 looper letters, 25 selfloop transitions, 6 changer transitions 0/32 dead transitions. [2023-11-06 22:09:26,920 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 32 transitions, 163 flow [2023-11-06 22:09:26,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:09:26,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:09:26,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 345 transitions. [2023-11-06 22:09:26,923 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4825174825174825 [2023-11-06 22:09:26,923 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 345 transitions. [2023-11-06 22:09:26,924 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 345 transitions. [2023-11-06 22:09:26,924 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:09:26,924 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 345 transitions. [2023-11-06 22:09:26,926 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 69.0) internal successors, (345), 5 states have internal predecessors, (345), 0 states have call successors, (0), 0 states 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 22:09:26,929 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 143.0) internal successors, (858), 6 states have internal predecessors, (858), 0 states have call successors, (0), 0 states 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 22:09:26,930 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 143.0) internal successors, (858), 6 states have internal predecessors, (858), 0 states have call successors, (0), 0 states 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 22:09:26,930 INFO L175 Difference]: Start difference. First operand has 22 places, 17 transitions, 56 flow. Second operand 5 states and 345 transitions. [2023-11-06 22:09:26,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 32 transitions, 163 flow [2023-11-06 22:09:26,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 32 transitions, 154 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-11-06 22:09:26,932 INFO L231 Difference]: Finished difference. Result has 27 places, 21 transitions, 92 flow [2023-11-06 22:09:26,932 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=143, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=92, PETRI_PLACES=27, PETRI_TRANSITIONS=21} [2023-11-06 22:09:26,933 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 7 predicate places. [2023-11-06 22:09:26,934 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 21 transitions, 92 flow [2023-11-06 22:09:26,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 66.0) internal successors, (660), 10 states have internal predecessors, (660), 0 states have call successors, (0), 0 states 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 22:09:26,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:09:26,935 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:09:26,946 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 22:09:27,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:09:27,141 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:09:27,142 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:09:27,142 INFO L85 PathProgramCache]: Analyzing trace with hash -867208430, now seen corresponding path program 2 times [2023-11-06 22:09:27,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:09:27,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883325638] [2023-11-06 22:09:27,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:09:27,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:09:27,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:09:27,276 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:09:27,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:09:27,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883325638] [2023-11-06 22:09:27,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883325638] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:09:27,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377847892] [2023-11-06 22:09:27,278 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:09:27,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:09:27,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:09:27,279 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:09:27,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 22:09:27,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:09:27,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:09:27,378 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:09:27,381 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:09:27,417 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:09:27,417 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:09:27,613 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:09:27,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377847892] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:09:27,614 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:09:27,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 3] total 4 [2023-11-06 22:09:27,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059228143] [2023-11-06 22:09:27,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:09:27,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 22:09:27,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:09:27,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 22:09:27,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:09:27,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 143 [2023-11-06 22:09:27,630 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 21 transitions, 92 flow. Second operand has 6 states, 6 states have (on average 71.5) internal successors, (429), 6 states have internal predecessors, (429), 0 states have call successors, (0), 0 states 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 22:09:27,630 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:09:27,630 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 143 [2023-11-06 22:09:27,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:09:27,741 INFO L124 PetriNetUnfolderBase]: 115/211 cut-off events. [2023-11-06 22:09:27,742 INFO L125 PetriNetUnfolderBase]: For 215/234 co-relation queries the response was YES. [2023-11-06 22:09:27,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 681 conditions, 211 events. 115/211 cut-off events. For 215/234 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 680 event pairs, 13 based on Foata normal form. 20/201 useless extension candidates. Maximal degree in co-relation 289. Up to 93 conditions per place. [2023-11-06 22:09:27,745 INFO L140 encePairwiseOnDemand]: 139/143 looper letters, 30 selfloop transitions, 9 changer transitions 4/46 dead transitions. [2023-11-06 22:09:27,746 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 46 transitions, 274 flow [2023-11-06 22:09:27,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:09:27,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 22:09:27,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 307 transitions. [2023-11-06 22:09:27,748 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5367132867132867 [2023-11-06 22:09:27,748 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 307 transitions. [2023-11-06 22:09:27,748 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 307 transitions. [2023-11-06 22:09:27,749 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:09:27,749 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 307 transitions. [2023-11-06 22:09:27,750 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 76.75) internal successors, (307), 4 states have internal predecessors, (307), 0 states have call successors, (0), 0 states 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 22:09:27,752 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 143.0) internal successors, (715), 5 states have internal predecessors, (715), 0 states have call successors, (0), 0 states 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 22:09:27,753 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 143.0) internal successors, (715), 5 states have internal predecessors, (715), 0 states have call successors, (0), 0 states 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 22:09:27,753 INFO L175 Difference]: Start difference. First operand has 27 places, 21 transitions, 92 flow. Second operand 4 states and 307 transitions. [2023-11-06 22:09:27,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 46 transitions, 274 flow [2023-11-06 22:09:27,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 46 transitions, 264 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-11-06 22:09:27,758 INFO L231 Difference]: Finished difference. Result has 31 places, 27 transitions, 158 flow [2023-11-06 22:09:27,758 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=143, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=158, PETRI_PLACES=31, PETRI_TRANSITIONS=27} [2023-11-06 22:09:27,759 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 11 predicate places. [2023-11-06 22:09:27,759 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 27 transitions, 158 flow [2023-11-06 22:09:27,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 71.5) internal successors, (429), 6 states have internal predecessors, (429), 0 states have call successors, (0), 0 states 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 22:09:27,760 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:09:27,760 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:09:27,771 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 22:09:27,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:09:27,967 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:09:27,967 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:09:27,967 INFO L85 PathProgramCache]: Analyzing trace with hash -648500367, now seen corresponding path program 3 times [2023-11-06 22:09:27,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:09:27,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044762383] [2023-11-06 22:09:27,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:09:27,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:09:27,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:09:28,135 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:09:28,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:09:28,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044762383] [2023-11-06 22:09:28,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044762383] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:09:28,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771465575] [2023-11-06 22:09:28,136 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:09:28,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:09:28,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:09:28,138 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:09:28,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 22:09:28,225 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 22:09:28,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:09:28,226 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 22:09:28,229 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:09:28,343 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:09:28,344 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:09:28,523 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:09:28,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771465575] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:09:28,525 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:09:28,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-11-06 22:09:28,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516391829] [2023-11-06 22:09:28,525 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:09:28,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-06 22:09:28,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:09:28,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-06 22:09:28,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2023-11-06 22:09:28,732 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 143 [2023-11-06 22:09:28,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 27 transitions, 158 flow. Second operand has 17 states, 17 states have (on average 60.35294117647059) internal successors, (1026), 17 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states 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 22:09:28,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:09:28,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 143 [2023-11-06 22:09:28,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:09:29,222 INFO L124 PetriNetUnfolderBase]: 195/341 cut-off events. [2023-11-06 22:09:29,222 INFO L125 PetriNetUnfolderBase]: For 648/648 co-relation queries the response was YES. [2023-11-06 22:09:29,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1251 conditions, 341 events. 195/341 cut-off events. For 648/648 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1184 event pairs, 13 based on Foata normal form. 22/363 useless extension candidates. Maximal degree in co-relation 743. Up to 141 conditions per place. [2023-11-06 22:09:29,227 INFO L140 encePairwiseOnDemand]: 136/143 looper letters, 57 selfloop transitions, 44 changer transitions 4/105 dead transitions. [2023-11-06 22:09:29,227 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 105 transitions, 747 flow [2023-11-06 22:09:29,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-06 22:09:29,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-06 22:09:29,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1255 transitions. [2023-11-06 22:09:29,233 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4388111888111888 [2023-11-06 22:09:29,233 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1255 transitions. [2023-11-06 22:09:29,233 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1255 transitions. [2023-11-06 22:09:29,235 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:09:29,235 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1255 transitions. [2023-11-06 22:09:29,239 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 62.75) internal successors, (1255), 20 states have internal predecessors, (1255), 0 states have call successors, (0), 0 states 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 22:09:29,245 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 143.0) internal successors, (3003), 21 states have internal predecessors, (3003), 0 states have call successors, (0), 0 states 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 22:09:29,246 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 143.0) internal successors, (3003), 21 states have internal predecessors, (3003), 0 states have call successors, (0), 0 states 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 22:09:29,246 INFO L175 Difference]: Start difference. First operand has 31 places, 27 transitions, 158 flow. Second operand 20 states and 1255 transitions. [2023-11-06 22:09:29,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 105 transitions, 747 flow [2023-11-06 22:09:29,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 105 transitions, 747 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-06 22:09:29,253 INFO L231 Difference]: Finished difference. Result has 60 places, 66 transitions, 579 flow [2023-11-06 22:09:29,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=143, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=579, PETRI_PLACES=60, PETRI_TRANSITIONS=66} [2023-11-06 22:09:29,254 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 40 predicate places. [2023-11-06 22:09:29,254 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 66 transitions, 579 flow [2023-11-06 22:09:29,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 60.35294117647059) internal successors, (1026), 17 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states 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 22:09:29,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:09:29,255 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:09:29,271 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 22:09:29,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:09:29,461 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:09:29,461 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:09:29,462 INFO L85 PathProgramCache]: Analyzing trace with hash -1946876597, now seen corresponding path program 4 times [2023-11-06 22:09:29,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:09:29,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786433896] [2023-11-06 22:09:29,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:09:29,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:09:29,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:09:29,658 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:09:29,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:09:29,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786433896] [2023-11-06 22:09:29,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786433896] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:09:29,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519633534] [2023-11-06 22:09:29,659 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:09:29,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:09:29,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:09:29,661 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:09:29,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 22:09:29,731 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:09:29,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:09:29,732 INFO L262 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:09:29,734 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:09:29,833 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:09:29,834 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:09:29,914 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:09:29,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519633534] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:09:29,914 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:09:29,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-11-06 22:09:29,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465171368] [2023-11-06 22:09:29,915 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:09:29,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-06 22:09:29,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:09:29,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-06 22:09:29,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2023-11-06 22:09:30,026 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 143 [2023-11-06 22:09:30,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 66 transitions, 579 flow. Second operand has 14 states, 14 states have (on average 60.357142857142854) internal successors, (845), 14 states have internal predecessors, (845), 0 states have call successors, (0), 0 states 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 22:09:30,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:09:30,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 143 [2023-11-06 22:09:30,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:09:30,576 INFO L124 PetriNetUnfolderBase]: 275/496 cut-off events. [2023-11-06 22:09:30,577 INFO L125 PetriNetUnfolderBase]: For 3706/3706 co-relation queries the response was YES. [2023-11-06 22:09:30,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2526 conditions, 496 events. 275/496 cut-off events. For 3706/3706 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 1986 event pairs, 3 based on Foata normal form. 12/508 useless extension candidates. Maximal degree in co-relation 1740. Up to 169 conditions per place. [2023-11-06 22:09:30,584 INFO L140 encePairwiseOnDemand]: 136/143 looper letters, 80 selfloop transitions, 71 changer transitions 16/167 dead transitions. [2023-11-06 22:09:30,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 167 transitions, 1594 flow [2023-11-06 22:09:30,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-06 22:09:30,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-11-06 22:09:30,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1453 transitions. [2023-11-06 22:09:30,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44177561568865914 [2023-11-06 22:09:30,591 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1453 transitions. [2023-11-06 22:09:30,591 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1453 transitions. [2023-11-06 22:09:30,592 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:09:30,593 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1453 transitions. [2023-11-06 22:09:30,597 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 63.17391304347826) internal successors, (1453), 23 states have internal predecessors, (1453), 0 states have call successors, (0), 0 states 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 22:09:30,604 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 143.0) internal successors, (3432), 24 states have internal predecessors, (3432), 0 states have call successors, (0), 0 states 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 22:09:30,606 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 143.0) internal successors, (3432), 24 states have internal predecessors, (3432), 0 states have call successors, (0), 0 states 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 22:09:30,606 INFO L175 Difference]: Start difference. First operand has 60 places, 66 transitions, 579 flow. Second operand 23 states and 1453 transitions. [2023-11-06 22:09:30,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 167 transitions, 1594 flow [2023-11-06 22:09:30,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 167 transitions, 1298 flow, removed 145 selfloop flow, removed 2 redundant places. [2023-11-06 22:09:30,624 INFO L231 Difference]: Finished difference. Result has 88 places, 99 transitions, 868 flow [2023-11-06 22:09:30,625 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=143, PETRI_DIFFERENCE_MINUEND_FLOW=411, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=868, PETRI_PLACES=88, PETRI_TRANSITIONS=99} [2023-11-06 22:09:30,626 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 68 predicate places. [2023-11-06 22:09:30,626 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 99 transitions, 868 flow [2023-11-06 22:09:30,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 60.357142857142854) internal successors, (845), 14 states have internal predecessors, (845), 0 states have call successors, (0), 0 states 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 22:09:30,626 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:09:30,627 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:09:30,642 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 22:09:30,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:09:30,832 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:09:30,833 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:09:30,833 INFO L85 PathProgramCache]: Analyzing trace with hash -1378903185, now seen corresponding path program 5 times [2023-11-06 22:09:30,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:09:30,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570861569] [2023-11-06 22:09:30,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:09:30,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:09:30,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:09:30,970 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:09:30,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:09:30,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570861569] [2023-11-06 22:09:30,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570861569] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:09:30,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323324222] [2023-11-06 22:09:30,971 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:09:30,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:09:30,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:09:30,975 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:09:30,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 22:09:31,056 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-06 22:09:31,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:09:31,057 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 22:09:31,059 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:09:31,162 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:09:31,162 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:09:31,242 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:09:31,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323324222] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:09:31,243 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:09:31,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-11-06 22:09:31,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079035823] [2023-11-06 22:09:31,244 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:09:31,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-06 22:09:31,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:09:31,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-06 22:09:31,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2023-11-06 22:09:31,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 143 [2023-11-06 22:09:31,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 99 transitions, 868 flow. Second operand has 15 states, 15 states have (on average 60.0) internal successors, (900), 15 states have internal predecessors, (900), 0 states have call successors, (0), 0 states 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 22:09:31,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:09:31,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 143 [2023-11-06 22:09:31,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:09:31,826 INFO L124 PetriNetUnfolderBase]: 372/628 cut-off events. [2023-11-06 22:09:31,827 INFO L125 PetriNetUnfolderBase]: For 6898/6898 co-relation queries the response was YES. [2023-11-06 22:09:31,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3650 conditions, 628 events. 372/628 cut-off events. For 6898/6898 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2497 event pairs, 19 based on Foata normal form. 22/650 useless extension candidates. Maximal degree in co-relation 2920. Up to 278 conditions per place. [2023-11-06 22:09:31,839 INFO L140 encePairwiseOnDemand]: 136/143 looper letters, 87 selfloop transitions, 100 changer transitions 0/187 dead transitions. [2023-11-06 22:09:31,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 187 transitions, 2032 flow [2023-11-06 22:09:31,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-06 22:09:31,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-06 22:09:31,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1311 transitions. [2023-11-06 22:09:31,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43656343656343655 [2023-11-06 22:09:31,846 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1311 transitions. [2023-11-06 22:09:31,846 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1311 transitions. [2023-11-06 22:09:31,847 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:09:31,847 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1311 transitions. [2023-11-06 22:09:31,851 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 62.42857142857143) internal successors, (1311), 21 states have internal predecessors, (1311), 0 states have call successors, (0), 0 states 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 22:09:31,859 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 143.0) internal successors, (3146), 22 states have internal predecessors, (3146), 0 states have call successors, (0), 0 states 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 22:09:31,860 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 143.0) internal successors, (3146), 22 states have internal predecessors, (3146), 0 states have call successors, (0), 0 states 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 22:09:31,861 INFO L175 Difference]: Start difference. First operand has 88 places, 99 transitions, 868 flow. Second operand 21 states and 1311 transitions. [2023-11-06 22:09:31,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 187 transitions, 2032 flow [2023-11-06 22:09:31,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 187 transitions, 1858 flow, removed 55 selfloop flow, removed 7 redundant places. [2023-11-06 22:09:31,903 INFO L231 Difference]: Finished difference. Result has 107 places, 149 transitions, 1644 flow [2023-11-06 22:09:31,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=143, PETRI_DIFFERENCE_MINUEND_FLOW=758, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1644, PETRI_PLACES=107, PETRI_TRANSITIONS=149} [2023-11-06 22:09:31,904 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 87 predicate places. [2023-11-06 22:09:31,906 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 149 transitions, 1644 flow [2023-11-06 22:09:31,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 60.0) internal successors, (900), 15 states have internal predecessors, (900), 0 states have call successors, (0), 0 states 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 22:09:31,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:09:31,909 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:09:31,919 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 22:09:32,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:09:32,115 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:09:32,115 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:09:32,115 INFO L85 PathProgramCache]: Analyzing trace with hash -520623301, now seen corresponding path program 6 times [2023-11-06 22:09:32,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:09:32,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122711535] [2023-11-06 22:09:32,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:09:32,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:09:32,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:09:32,244 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:09:32,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:09:32,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122711535] [2023-11-06 22:09:32,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122711535] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:09:32,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098669060] [2023-11-06 22:09:32,246 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:09:32,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:09:32,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:09:32,247 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:09:32,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 22:09:32,322 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-06 22:09:32,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:09:32,323 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 22:09:32,325 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:09:32,404 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:09:32,404 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:09:32,535 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:09:32,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098669060] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:09:32,536 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:09:32,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-11-06 22:09:32,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036158232] [2023-11-06 22:09:32,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:09:32,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-06 22:09:32,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:09:32,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-06 22:09:32,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2023-11-06 22:09:32,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 143 [2023-11-06 22:09:32,640 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 149 transitions, 1644 flow. Second operand has 16 states, 16 states have (on average 60.25) internal successors, (964), 16 states have internal predecessors, (964), 0 states have call successors, (0), 0 states 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 22:09:32,640 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:09:32,640 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 143 [2023-11-06 22:09:32,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:09:33,222 INFO L124 PetriNetUnfolderBase]: 373/655 cut-off events. [2023-11-06 22:09:33,223 INFO L125 PetriNetUnfolderBase]: For 10905/10905 co-relation queries the response was YES. [2023-11-06 22:09:33,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3771 conditions, 655 events. 373/655 cut-off events. For 10905/10905 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 2793 event pairs, 9 based on Foata normal form. 38/693 useless extension candidates. Maximal degree in co-relation 3519. Up to 226 conditions per place. [2023-11-06 22:09:33,232 INFO L140 encePairwiseOnDemand]: 136/143 looper letters, 73 selfloop transitions, 117 changer transitions 1/191 dead transitions. [2023-11-06 22:09:33,232 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 191 transitions, 2163 flow [2023-11-06 22:09:33,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-06 22:09:33,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-11-06 22:09:33,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1437 transitions. [2023-11-06 22:09:33,239 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43691091517178476 [2023-11-06 22:09:33,239 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1437 transitions. [2023-11-06 22:09:33,239 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1437 transitions. [2023-11-06 22:09:33,241 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:09:33,241 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1437 transitions. [2023-11-06 22:09:33,245 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 62.47826086956522) internal successors, (1437), 23 states have internal predecessors, (1437), 0 states have call successors, (0), 0 states 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 22:09:33,252 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 143.0) internal successors, (3432), 24 states have internal predecessors, (3432), 0 states have call successors, (0), 0 states 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 22:09:33,253 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 143.0) internal successors, (3432), 24 states have internal predecessors, (3432), 0 states have call successors, (0), 0 states 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 22:09:33,253 INFO L175 Difference]: Start difference. First operand has 107 places, 149 transitions, 1644 flow. Second operand 23 states and 1437 transitions. [2023-11-06 22:09:33,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 191 transitions, 2163 flow [2023-11-06 22:09:33,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 191 transitions, 1837 flow, removed 133 selfloop flow, removed 11 redundant places. [2023-11-06 22:09:33,292 INFO L231 Difference]: Finished difference. Result has 119 places, 151 transitions, 1616 flow [2023-11-06 22:09:33,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=143, PETRI_DIFFERENCE_MINUEND_FLOW=1248, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1616, PETRI_PLACES=119, PETRI_TRANSITIONS=151} [2023-11-06 22:09:33,295 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 99 predicate places. [2023-11-06 22:09:33,296 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 151 transitions, 1616 flow [2023-11-06 22:09:33,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 60.25) internal successors, (964), 16 states have internal predecessors, (964), 0 states have call successors, (0), 0 states 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 22:09:33,296 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:09:33,296 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:09:33,306 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 22:09:33,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-06 22:09:33,501 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:09:33,502 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:09:33,502 INFO L85 PathProgramCache]: Analyzing trace with hash 307010103, now seen corresponding path program 7 times [2023-11-06 22:09:33,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:09:33,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728347049] [2023-11-06 22:09:33,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:09:33,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:09:33,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:09:33,677 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:09:33,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:09:33,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728347049] [2023-11-06 22:09:33,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728347049] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:09:33,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400569169] [2023-11-06 22:09:33,678 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 22:09:33,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:09:33,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:09:33,680 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:09:33,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 22:09:33,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:09:33,757 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 22:09:33,758 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:09:33,869 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:09:33,869 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:09:33,999 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:09:33,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400569169] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:09:34,000 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:09:34,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2023-11-06 22:09:34,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079411343] [2023-11-06 22:09:34,002 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:09:34,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-06 22:09:34,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:09:34,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-06 22:09:34,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2023-11-06 22:09:34,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 143 [2023-11-06 22:09:34,125 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 151 transitions, 1616 flow. Second operand has 18 states, 18 states have (on average 60.333333333333336) internal successors, (1086), 18 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states 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 22:09:34,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:09:34,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 143 [2023-11-06 22:09:34,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:09:34,872 INFO L124 PetriNetUnfolderBase]: 462/832 cut-off events. [2023-11-06 22:09:34,872 INFO L125 PetriNetUnfolderBase]: For 4523/4523 co-relation queries the response was YES. [2023-11-06 22:09:34,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4386 conditions, 832 events. 462/832 cut-off events. For 4523/4523 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 3778 event pairs, 13 based on Foata normal form. 52/880 useless extension candidates. Maximal degree in co-relation 4103. Up to 492 conditions per place. [2023-11-06 22:09:34,884 INFO L140 encePairwiseOnDemand]: 136/143 looper letters, 154 selfloop transitions, 83 changer transitions 0/237 dead transitions. [2023-11-06 22:09:34,884 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 237 transitions, 2660 flow [2023-11-06 22:09:34,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-06 22:09:34,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-06 22:09:34,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1508 transitions. [2023-11-06 22:09:34,892 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4393939393939394 [2023-11-06 22:09:34,892 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1508 transitions. [2023-11-06 22:09:34,892 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1508 transitions. [2023-11-06 22:09:34,893 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:09:34,893 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1508 transitions. [2023-11-06 22:09:34,899 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 62.833333333333336) internal successors, (1508), 24 states have internal predecessors, (1508), 0 states have call successors, (0), 0 states 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 22:09:34,907 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 143.0) internal successors, (3575), 25 states have internal predecessors, (3575), 0 states have call successors, (0), 0 states 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 22:09:34,908 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 143.0) internal successors, (3575), 25 states have internal predecessors, (3575), 0 states have call successors, (0), 0 states 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 22:09:34,908 INFO L175 Difference]: Start difference. First operand has 119 places, 151 transitions, 1616 flow. Second operand 24 states and 1508 transitions. [2023-11-06 22:09:34,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 237 transitions, 2660 flow [2023-11-06 22:09:34,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 237 transitions, 2425 flow, removed 27 selfloop flow, removed 19 redundant places. [2023-11-06 22:09:34,947 INFO L231 Difference]: Finished difference. Result has 136 places, 188 transitions, 2122 flow [2023-11-06 22:09:34,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=143, PETRI_DIFFERENCE_MINUEND_FLOW=1399, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=2122, PETRI_PLACES=136, PETRI_TRANSITIONS=188} [2023-11-06 22:09:34,948 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 116 predicate places. [2023-11-06 22:09:34,948 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 188 transitions, 2122 flow [2023-11-06 22:09:34,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 60.333333333333336) internal successors, (1086), 18 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states 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 22:09:34,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:09:34,949 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:09:34,960 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 22:09:35,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-06 22:09:35,155 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:09:35,155 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:09:35,156 INFO L85 PathProgramCache]: Analyzing trace with hash -176906227, now seen corresponding path program 8 times [2023-11-06 22:09:35,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:09:35,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906464042] [2023-11-06 22:09:35,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:09:35,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:09:35,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:09:35,292 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:09:35,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:09:35,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906464042] [2023-11-06 22:09:35,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906464042] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:09:35,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174163989] [2023-11-06 22:09:35,293 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:09:35,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:09:35,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:09:35,295 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:09:35,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 22:09:35,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:09:35,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:09:35,376 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 22:09:35,377 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:09:35,485 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:09:35,485 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:09:35,645 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:09:35,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174163989] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:09:35,646 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:09:35,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2023-11-06 22:09:35,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512676605] [2023-11-06 22:09:35,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:09:35,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-06 22:09:35,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:09:35,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-06 22:09:35,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2023-11-06 22:09:35,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 143 [2023-11-06 22:09:35,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 188 transitions, 2122 flow. Second operand has 18 states, 18 states have (on average 60.27777777777778) internal successors, (1085), 18 states have internal predecessors, (1085), 0 states have call successors, (0), 0 states 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 22:09:35,762 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:09:35,762 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 143 [2023-11-06 22:09:35,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:09:36,597 INFO L124 PetriNetUnfolderBase]: 642/1152 cut-off events. [2023-11-06 22:09:36,597 INFO L125 PetriNetUnfolderBase]: For 5131/5131 co-relation queries the response was YES. [2023-11-06 22:09:36,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6373 conditions, 1152 events. 642/1152 cut-off events. For 5131/5131 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 5775 event pairs, 17 based on Foata normal form. 12/1160 useless extension candidates. Maximal degree in co-relation 6082. Up to 396 conditions per place. [2023-11-06 22:09:36,614 INFO L140 encePairwiseOnDemand]: 136/143 looper letters, 140 selfloop transitions, 177 changer transitions 1/318 dead transitions. [2023-11-06 22:09:36,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 318 transitions, 3662 flow [2023-11-06 22:09:36,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-06 22:09:36,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-11-06 22:09:36,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1805 transitions. [2023-11-06 22:09:36,619 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4352544007716421 [2023-11-06 22:09:36,619 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1805 transitions. [2023-11-06 22:09:36,619 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1805 transitions. [2023-11-06 22:09:36,622 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:09:36,622 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1805 transitions. [2023-11-06 22:09:36,629 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 62.241379310344826) internal successors, (1805), 29 states have internal predecessors, (1805), 0 states have call successors, (0), 0 states 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 22:09:36,638 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 143.0) internal successors, (4290), 30 states have internal predecessors, (4290), 0 states have call successors, (0), 0 states 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 22:09:36,640 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 143.0) internal successors, (4290), 30 states have internal predecessors, (4290), 0 states have call successors, (0), 0 states 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 22:09:36,640 INFO L175 Difference]: Start difference. First operand has 136 places, 188 transitions, 2122 flow. Second operand 29 states and 1805 transitions. [2023-11-06 22:09:36,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 318 transitions, 3662 flow [2023-11-06 22:09:36,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 318 transitions, 3496 flow, removed 73 selfloop flow, removed 5 redundant places. [2023-11-06 22:09:36,694 INFO L231 Difference]: Finished difference. Result has 167 places, 265 transitions, 3263 flow [2023-11-06 22:09:36,695 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=143, PETRI_DIFFERENCE_MINUEND_FLOW=1956, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=3263, PETRI_PLACES=167, PETRI_TRANSITIONS=265} [2023-11-06 22:09:36,695 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 147 predicate places. [2023-11-06 22:09:36,695 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 265 transitions, 3263 flow [2023-11-06 22:09:36,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 60.27777777777778) internal successors, (1085), 18 states have internal predecessors, (1085), 0 states have call successors, (0), 0 states 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 22:09:36,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:09:36,696 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:09:36,706 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-06 22:09:36,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:09:36,902 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:09:36,902 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:09:36,902 INFO L85 PathProgramCache]: Analyzing trace with hash 214788165, now seen corresponding path program 9 times [2023-11-06 22:09:36,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:09:36,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846233723] [2023-11-06 22:09:36,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:09:36,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:09:36,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:09:37,045 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:09:37,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:09:37,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846233723] [2023-11-06 22:09:37,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846233723] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:09:37,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848457242] [2023-11-06 22:09:37,046 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:09:37,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:09:37,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:09:37,047 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:09:37,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 22:09:37,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-06 22:09:37,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:09:37,130 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 22:09:37,132 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:09:37,216 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:09:37,216 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:09:37,310 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:09:37,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848457242] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:09:37,310 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:09:37,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 16 [2023-11-06 22:09:37,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517109322] [2023-11-06 22:09:37,311 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:09:37,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-06 22:09:37,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:09:37,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-06 22:09:37,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2023-11-06 22:09:37,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 143 [2023-11-06 22:09:37,426 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 265 transitions, 3263 flow. Second operand has 16 states, 16 states have (on average 60.25) internal successors, (964), 16 states have internal predecessors, (964), 0 states have call successors, (0), 0 states 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 22:09:37,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:09:37,427 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 143 [2023-11-06 22:09:37,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:09:37,935 INFO L124 PetriNetUnfolderBase]: 633/1103 cut-off events. [2023-11-06 22:09:37,935 INFO L125 PetriNetUnfolderBase]: For 6280/6280 co-relation queries the response was YES. [2023-11-06 22:09:37,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6812 conditions, 1103 events. 633/1103 cut-off events. For 6280/6280 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 5379 event pairs, 17 based on Foata normal form. 8/1111 useless extension candidates. Maximal degree in co-relation 6515. Up to 859 conditions per place. [2023-11-06 22:09:37,952 INFO L140 encePairwiseOnDemand]: 136/143 looper letters, 215 selfloop transitions, 79 changer transitions 3/297 dead transitions. [2023-11-06 22:09:37,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 297 transitions, 4110 flow [2023-11-06 22:09:37,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-06 22:09:37,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-06 22:09:37,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 872 transitions. [2023-11-06 22:09:37,955 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4355644355644356 [2023-11-06 22:09:37,955 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 872 transitions. [2023-11-06 22:09:37,955 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 872 transitions. [2023-11-06 22:09:37,956 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:09:37,956 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 872 transitions. [2023-11-06 22:09:37,958 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 62.285714285714285) internal successors, (872), 14 states have internal predecessors, (872), 0 states have call successors, (0), 0 states 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 22:09:37,962 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 143.0) internal successors, (2145), 15 states have internal predecessors, (2145), 0 states have call successors, (0), 0 states 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 22:09:37,963 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 143.0) internal successors, (2145), 15 states have internal predecessors, (2145), 0 states have call successors, (0), 0 states 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 22:09:37,963 INFO L175 Difference]: Start difference. First operand has 167 places, 265 transitions, 3263 flow. Second operand 14 states and 872 transitions. [2023-11-06 22:09:37,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 297 transitions, 4110 flow [2023-11-06 22:09:38,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 297 transitions, 3912 flow, removed 51 selfloop flow, removed 14 redundant places. [2023-11-06 22:09:38,032 INFO L231 Difference]: Finished difference. Result has 168 places, 272 transitions, 3361 flow [2023-11-06 22:09:38,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=143, PETRI_DIFFERENCE_MINUEND_FLOW=3069, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=3361, PETRI_PLACES=168, PETRI_TRANSITIONS=272} [2023-11-06 22:09:38,033 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 148 predicate places. [2023-11-06 22:09:38,034 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 272 transitions, 3361 flow [2023-11-06 22:09:38,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 60.25) internal successors, (964), 16 states have internal predecessors, (964), 0 states have call successors, (0), 0 states 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 22:09:38,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:09:38,035 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:09:38,040 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-06 22:09:38,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:09:38,240 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:09:38,240 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:09:38,240 INFO L85 PathProgramCache]: Analyzing trace with hash 470174958, now seen corresponding path program 10 times [2023-11-06 22:09:38,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:09:38,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154009294] [2023-11-06 22:09:38,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:09:38,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:09:38,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:09:38,410 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:09:38,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:09:38,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154009294] [2023-11-06 22:09:38,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154009294] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:09:38,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452085855] [2023-11-06 22:09:38,412 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:09:38,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:09:38,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:09:38,415 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:09:38,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 22:09:38,505 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:09:38,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:09:38,506 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-06 22:09:38,507 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:09:38,550 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:09:38,550 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:09:38,695 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:09:38,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452085855] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:09:38,695 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:09:38,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 5] total 8 [2023-11-06 22:09:38,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035032247] [2023-11-06 22:09:38,696 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:09:38,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 22:09:38,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:09:38,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 22:09:38,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2023-11-06 22:09:38,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 143 [2023-11-06 22:09:38,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 272 transitions, 3361 flow. Second operand has 10 states, 10 states have (on average 66.2) internal successors, (662), 10 states have internal predecessors, (662), 0 states have call successors, (0), 0 states 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 22:09:38,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:09:38,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 143 [2023-11-06 22:09:38,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:09:39,260 INFO L124 PetriNetUnfolderBase]: 940/1629 cut-off events. [2023-11-06 22:09:39,261 INFO L125 PetriNetUnfolderBase]: For 10083/10087 co-relation queries the response was YES. [2023-11-06 22:09:39,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10190 conditions, 1629 events. 940/1629 cut-off events. For 10083/10087 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 8708 event pairs, 24 based on Foata normal form. 1/1628 useless extension candidates. Maximal degree in co-relation 9683. Up to 842 conditions per place. [2023-11-06 22:09:39,284 INFO L140 encePairwiseOnDemand]: 139/143 looper letters, 274 selfloop transitions, 113 changer transitions 55/445 dead transitions. [2023-11-06 22:09:39,284 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 445 transitions, 6304 flow [2023-11-06 22:09:39,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:09:39,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 22:09:39,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 431 transitions. [2023-11-06 22:09:39,286 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5023310023310024 [2023-11-06 22:09:39,286 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 431 transitions. [2023-11-06 22:09:39,286 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 431 transitions. [2023-11-06 22:09:39,287 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:09:39,287 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 431 transitions. [2023-11-06 22:09:39,288 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 71.83333333333333) internal successors, (431), 6 states have internal predecessors, (431), 0 states have call successors, (0), 0 states 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 22:09:39,289 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 143.0) internal successors, (1001), 7 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states 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 22:09:39,290 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 143.0) internal successors, (1001), 7 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states 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 22:09:39,290 INFO L175 Difference]: Start difference. First operand has 168 places, 272 transitions, 3361 flow. Second operand 6 states and 431 transitions. [2023-11-06 22:09:39,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 445 transitions, 6304 flow [2023-11-06 22:09:39,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 445 transitions, 6084 flow, removed 37 selfloop flow, removed 7 redundant places. [2023-11-06 22:09:39,392 INFO L231 Difference]: Finished difference. Result has 168 places, 335 transitions, 4499 flow [2023-11-06 22:09:39,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=143, PETRI_DIFFERENCE_MINUEND_FLOW=3233, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4499, PETRI_PLACES=168, PETRI_TRANSITIONS=335} [2023-11-06 22:09:39,393 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 148 predicate places. [2023-11-06 22:09:39,393 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 335 transitions, 4499 flow [2023-11-06 22:09:39,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 66.2) internal successors, (662), 10 states have internal predecessors, (662), 0 states have call successors, (0), 0 states 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 22:09:39,394 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:09:39,394 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:09:39,408 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-06 22:09:39,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:09:39,599 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:09:39,599 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:09:39,600 INFO L85 PathProgramCache]: Analyzing trace with hash -1396852370, now seen corresponding path program 11 times [2023-11-06 22:09:39,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:09:39,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249599322] [2023-11-06 22:09:39,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:09:39,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:09:39,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:09:39,771 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:09:39,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:09:39,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249599322] [2023-11-06 22:09:39,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249599322] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:09:39,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2147162871] [2023-11-06 22:09:39,772 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:09:39,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:09:39,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:09:39,774 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:09:39,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-06 22:09:39,856 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-06 22:09:39,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:09:39,857 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 22:09:39,859 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:09:39,890 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:09:39,890 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:09:39,958 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:09:39,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2147162871] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:09:39,959 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:09:39,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4, 4] total 12 [2023-11-06 22:09:39,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125994208] [2023-11-06 22:09:39,960 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:09:39,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-06 22:09:39,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:09:39,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-06 22:09:39,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2023-11-06 22:09:40,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 143 [2023-11-06 22:09:40,044 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 335 transitions, 4499 flow. Second operand has 13 states, 13 states have (on average 60.84615384615385) internal successors, (791), 13 states have internal predecessors, (791), 0 states have call successors, (0), 0 states 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 22:09:40,044 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:09:40,044 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 143 [2023-11-06 22:09:40,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:09:40,817 INFO L124 PetriNetUnfolderBase]: 916/1623 cut-off events. [2023-11-06 22:09:40,817 INFO L125 PetriNetUnfolderBase]: For 12962/12962 co-relation queries the response was YES. [2023-11-06 22:09:40,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10822 conditions, 1623 events. 916/1623 cut-off events. For 12962/12962 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 8907 event pairs, 41 based on Foata normal form. 34/1657 useless extension candidates. Maximal degree in co-relation 10316. Up to 1242 conditions per place. [2023-11-06 22:09:40,854 INFO L140 encePairwiseOnDemand]: 136/143 looper letters, 310 selfloop transitions, 87 changer transitions 26/423 dead transitions. [2023-11-06 22:09:40,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 423 transitions, 6220 flow [2023-11-06 22:09:40,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-06 22:09:40,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-06 22:09:40,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1206 transitions. [2023-11-06 22:09:40,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4438719175561281 [2023-11-06 22:09:40,858 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1206 transitions. [2023-11-06 22:09:40,858 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1206 transitions. [2023-11-06 22:09:40,859 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:09:40,859 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1206 transitions. [2023-11-06 22:09:40,862 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 63.473684210526315) internal successors, (1206), 19 states have internal predecessors, (1206), 0 states have call successors, (0), 0 states 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 22:09:40,866 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 143.0) internal successors, (2860), 20 states have internal predecessors, (2860), 0 states have call successors, (0), 0 states 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 22:09:40,876 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 143.0) internal successors, (2860), 20 states have internal predecessors, (2860), 0 states have call successors, (0), 0 states 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 22:09:40,884 INFO L175 Difference]: Start difference. First operand has 168 places, 335 transitions, 4499 flow. Second operand 19 states and 1206 transitions. [2023-11-06 22:09:40,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 423 transitions, 6220 flow [2023-11-06 22:09:40,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 423 transitions, 6152 flow, removed 25 selfloop flow, removed 2 redundant places. [2023-11-06 22:09:41,001 INFO L231 Difference]: Finished difference. Result has 191 places, 352 transitions, 5021 flow [2023-11-06 22:09:41,001 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=143, PETRI_DIFFERENCE_MINUEND_FLOW=4447, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=5021, PETRI_PLACES=191, PETRI_TRANSITIONS=352} [2023-11-06 22:09:41,002 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 171 predicate places. [2023-11-06 22:09:41,003 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 352 transitions, 5021 flow [2023-11-06 22:09:41,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 60.84615384615385) internal successors, (791), 13 states have internal predecessors, (791), 0 states have call successors, (0), 0 states 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 22:09:41,004 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:09:41,004 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:09:41,011 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-06 22:09:41,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-06 22:09:41,211 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:09:41,211 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:09:41,212 INFO L85 PathProgramCache]: Analyzing trace with hash 458824085, now seen corresponding path program 12 times [2023-11-06 22:09:41,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:09:41,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542944953] [2023-11-06 22:09:41,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:09:41,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:09:41,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:09:41,444 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:09:41,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:09:41,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542944953] [2023-11-06 22:09:41,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542944953] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:09:41,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614870345] [2023-11-06 22:09:41,445 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:09:41,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:09:41,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:09:41,446 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:09:41,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-06 22:09:41,529 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-06 22:09:41,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:09:41,530 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 22:09:41,532 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:09:41,635 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:09:41,635 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:09:41,937 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:09:41,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614870345] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:09:41,938 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:09:41,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2023-11-06 22:09:41,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642523237] [2023-11-06 22:09:41,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:09:41,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-06 22:09:41,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:09:41,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-06 22:09:41,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2023-11-06 22:09:42,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 143 [2023-11-06 22:09:42,093 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 352 transitions, 5021 flow. Second operand has 21 states, 21 states have (on average 60.19047619047619) internal successors, (1264), 21 states have internal predecessors, (1264), 0 states have call successors, (0), 0 states 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 22:09:42,093 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:09:42,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 143 [2023-11-06 22:09:42,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:09:43,490 INFO L124 PetriNetUnfolderBase]: 1179/2078 cut-off events. [2023-11-06 22:09:43,490 INFO L125 PetriNetUnfolderBase]: For 20173/20173 co-relation queries the response was YES. [2023-11-06 22:09:43,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14541 conditions, 2078 events. 1179/2078 cut-off events. For 20173/20173 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 11963 event pairs, 6 based on Foata normal form. 18/2096 useless extension candidates. Maximal degree in co-relation 13740. Up to 628 conditions per place. [2023-11-06 22:09:43,521 INFO L140 encePairwiseOnDemand]: 136/143 looper letters, 147 selfloop transitions, 401 changer transitions 49/597 dead transitions. [2023-11-06 22:09:43,521 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 597 transitions, 9013 flow [2023-11-06 22:09:43,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-06 22:09:43,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-11-06 22:09:43,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 2131 transitions. [2023-11-06 22:09:43,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43829699712052655 [2023-11-06 22:09:43,533 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 2131 transitions. [2023-11-06 22:09:43,533 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 2131 transitions. [2023-11-06 22:09:43,534 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:09:43,535 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 2131 transitions. [2023-11-06 22:09:43,539 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 62.6764705882353) internal successors, (2131), 34 states have internal predecessors, (2131), 0 states have call successors, (0), 0 states 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 22:09:43,547 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 143.0) internal successors, (5005), 35 states have internal predecessors, (5005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:09:43,549 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 143.0) internal successors, (5005), 35 states have internal predecessors, (5005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:09:43,549 INFO L175 Difference]: Start difference. First operand has 191 places, 352 transitions, 5021 flow. Second operand 34 states and 2131 transitions. [2023-11-06 22:09:43,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 597 transitions, 9013 flow [2023-11-06 22:09:43,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 597 transitions, 8627 flow, removed 58 selfloop flow, removed 12 redundant places. [2023-11-06 22:09:43,751 INFO L231 Difference]: Finished difference. Result has 222 places, 468 transitions, 7701 flow [2023-11-06 22:09:43,752 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=143, PETRI_DIFFERENCE_MINUEND_FLOW=4721, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=286, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=7701, PETRI_PLACES=222, PETRI_TRANSITIONS=468} [2023-11-06 22:09:43,753 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 202 predicate places. [2023-11-06 22:09:43,753 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 468 transitions, 7701 flow [2023-11-06 22:09:43,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 60.19047619047619) internal successors, (1264), 21 states have internal predecessors, (1264), 0 states have call successors, (0), 0 states 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 22:09:43,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:09:43,754 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:09:43,767 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-06 22:09:43,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-06 22:09:43,960 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:09:43,960 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:09:43,961 INFO L85 PathProgramCache]: Analyzing trace with hash -2146198815, now seen corresponding path program 13 times [2023-11-06 22:09:43,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:09:43,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897114350] [2023-11-06 22:09:43,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:09:43,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:09:43,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:09:44,190 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:09:44,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:09:44,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897114350] [2023-11-06 22:09:44,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897114350] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:09:44,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170210344] [2023-11-06 22:09:44,191 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 22:09:44,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:09:44,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:09:44,192 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:09:44,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-06 22:09:44,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:09:44,279 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 22:09:44,281 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:09:44,395 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:09:44,395 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:09:44,690 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:09:44,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170210344] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:09:44,690 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:09:44,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2023-11-06 22:09:44,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658654849] [2023-11-06 22:09:44,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:09:44,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-06 22:09:44,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:09:44,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-06 22:09:44,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2023-11-06 22:09:44,870 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 143 [2023-11-06 22:09:44,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 468 transitions, 7701 flow. Second operand has 22 states, 22 states have (on average 60.0) internal successors, (1320), 22 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states 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 22:09:44,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:09:44,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 143 [2023-11-06 22:09:44,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:09:46,362 INFO L124 PetriNetUnfolderBase]: 1308/2255 cut-off events. [2023-11-06 22:09:46,363 INFO L125 PetriNetUnfolderBase]: For 32275/32275 co-relation queries the response was YES. [2023-11-06 22:09:46,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18208 conditions, 2255 events. 1308/2255 cut-off events. For 32275/32275 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 12746 event pairs, 13 based on Foata normal form. 54/2309 useless extension candidates. Maximal degree in co-relation 17487. Up to 627 conditions per place. [2023-11-06 22:09:46,397 INFO L140 encePairwiseOnDemand]: 136/143 looper letters, 158 selfloop transitions, 454 changer transitions 15/627 dead transitions. [2023-11-06 22:09:46,398 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 627 transitions, 11085 flow [2023-11-06 22:09:46,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-11-06 22:09:46,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-11-06 22:09:46,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 2064 transitions. [2023-11-06 22:09:46,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43738080101716464 [2023-11-06 22:09:46,414 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 2064 transitions. [2023-11-06 22:09:46,414 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 2064 transitions. [2023-11-06 22:09:46,415 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:09:46,415 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 2064 transitions. [2023-11-06 22:09:46,419 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 62.54545454545455) internal successors, (2064), 33 states have internal predecessors, (2064), 0 states have call successors, (0), 0 states 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 22:09:46,426 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 143.0) internal successors, (4862), 34 states have internal predecessors, (4862), 0 states have call successors, (0), 0 states 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 22:09:46,427 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 143.0) internal successors, (4862), 34 states have internal predecessors, (4862), 0 states have call successors, (0), 0 states 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 22:09:46,428 INFO L175 Difference]: Start difference. First operand has 222 places, 468 transitions, 7701 flow. Second operand 33 states and 2064 transitions. [2023-11-06 22:09:46,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 627 transitions, 11085 flow [2023-11-06 22:09:46,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 627 transitions, 10360 flow, removed 318 selfloop flow, removed 11 redundant places. [2023-11-06 22:09:46,648 INFO L231 Difference]: Finished difference. Result has 252 places, 544 transitions, 9753 flow [2023-11-06 22:09:46,648 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=143, PETRI_DIFFERENCE_MINUEND_FLOW=7208, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=377, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=9753, PETRI_PLACES=252, PETRI_TRANSITIONS=544} [2023-11-06 22:09:46,649 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 232 predicate places. [2023-11-06 22:09:46,649 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 544 transitions, 9753 flow [2023-11-06 22:09:46,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 60.0) internal successors, (1320), 22 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states 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 22:09:46,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:09:46,650 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:09:46,654 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-06 22:09:46,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:09:46,850 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:09:46,851 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:09:46,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1415392433, now seen corresponding path program 14 times [2023-11-06 22:09:46,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:09:46,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688096931] [2023-11-06 22:09:46,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:09:46,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:09:46,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:09:47,026 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:09:47,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:09:47,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688096931] [2023-11-06 22:09:47,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688096931] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:09:47,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416191161] [2023-11-06 22:09:47,027 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:09:47,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:09:47,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:09:47,029 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:09:47,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-06 22:09:47,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:09:47,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:09:47,119 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-06 22:09:47,120 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:09:47,226 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:09:47,226 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:09:47,540 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:09:47,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416191161] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:09:47,541 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:09:47,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2023-11-06 22:09:47,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301209694] [2023-11-06 22:09:47,542 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:09:47,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-06 22:09:47,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:09:47,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-06 22:09:47,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=310, Unknown=0, NotChecked=0, Total=420 [2023-11-06 22:09:47,721 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 143 [2023-11-06 22:09:47,723 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 544 transitions, 9753 flow. Second operand has 21 states, 21 states have (on average 59.95238095238095) internal successors, (1259), 21 states have internal predecessors, (1259), 0 states have call successors, (0), 0 states 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 22:09:47,723 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:09:47,723 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 143 [2023-11-06 22:09:47,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:09:49,069 INFO L124 PetriNetUnfolderBase]: 1440/2445 cut-off events. [2023-11-06 22:09:49,069 INFO L125 PetriNetUnfolderBase]: For 44099/44099 co-relation queries the response was YES. [2023-11-06 22:09:49,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21503 conditions, 2445 events. 1440/2445 cut-off events. For 44099/44099 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 13774 event pairs, 44 based on Foata normal form. 32/2477 useless extension candidates. Maximal degree in co-relation 20613. Up to 1147 conditions per place. [2023-11-06 22:09:49,114 INFO L140 encePairwiseOnDemand]: 136/143 looper letters, 195 selfloop transitions, 466 changer transitions 7/668 dead transitions. [2023-11-06 22:09:49,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 668 transitions, 13088 flow [2023-11-06 22:09:49,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-06 22:09:49,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-11-06 22:09:49,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1681 transitions. [2023-11-06 22:09:49,119 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43537943537943535 [2023-11-06 22:09:49,119 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1681 transitions. [2023-11-06 22:09:49,119 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1681 transitions. [2023-11-06 22:09:49,120 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:09:49,121 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1681 transitions. [2023-11-06 22:09:49,125 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 62.25925925925926) internal successors, (1681), 27 states have internal predecessors, (1681), 0 states have call successors, (0), 0 states 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 22:09:49,131 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 143.0) internal successors, (4004), 28 states have internal predecessors, (4004), 0 states have call successors, (0), 0 states 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 22:09:49,133 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 143.0) internal successors, (4004), 28 states have internal predecessors, (4004), 0 states have call successors, (0), 0 states 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 22:09:49,133 INFO L175 Difference]: Start difference. First operand has 252 places, 544 transitions, 9753 flow. Second operand 27 states and 1681 transitions. [2023-11-06 22:09:49,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 668 transitions, 13088 flow [2023-11-06 22:09:49,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 668 transitions, 12405 flow, removed 156 selfloop flow, removed 17 redundant places. [2023-11-06 22:09:49,598 INFO L231 Difference]: Finished difference. Result has 264 places, 615 transitions, 11739 flow [2023-11-06 22:09:49,599 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=143, PETRI_DIFFERENCE_MINUEND_FLOW=9122, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=544, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=399, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=11739, PETRI_PLACES=264, PETRI_TRANSITIONS=615} [2023-11-06 22:09:49,600 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 244 predicate places. [2023-11-06 22:09:49,600 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 615 transitions, 11739 flow [2023-11-06 22:09:49,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 59.95238095238095) internal successors, (1259), 21 states have internal predecessors, (1259), 0 states have call successors, (0), 0 states 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 22:09:49,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:09:49,600 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:09:49,607 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-06 22:09:49,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-06 22:09:49,803 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:09:49,803 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:09:49,804 INFO L85 PathProgramCache]: Analyzing trace with hash -300605875, now seen corresponding path program 15 times [2023-11-06 22:09:49,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:09:49,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57044637] [2023-11-06 22:09:49,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:09:49,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:09:49,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:09:50,052 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:09:50,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:09:50,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57044637] [2023-11-06 22:09:50,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57044637] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:09:50,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698011020] [2023-11-06 22:09:50,053 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:09:50,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:09:50,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:09:50,054 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:09:50,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-06 22:09:50,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-06 22:09:50,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:09:50,149 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 22:09:50,150 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:09:50,350 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:09:50,350 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:09:50,488 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:09:50,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698011020] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:09:50,488 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:09:50,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2023-11-06 22:09:50,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807252790] [2023-11-06 22:09:50,489 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:09:50,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-06 22:09:50,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:09:50,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-06 22:09:50,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2023-11-06 22:09:50,640 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 143 [2023-11-06 22:09:50,641 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 615 transitions, 11739 flow. Second operand has 20 states, 20 states have (on average 60.05) internal successors, (1201), 20 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 22:09:50,641 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:09:50,641 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 143 [2023-11-06 22:09:50,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:09:52,454 INFO L124 PetriNetUnfolderBase]: 1541/2654 cut-off events. [2023-11-06 22:09:52,454 INFO L125 PetriNetUnfolderBase]: For 48927/48927 co-relation queries the response was YES. [2023-11-06 22:09:52,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23996 conditions, 2654 events. 1541/2654 cut-off events. For 48927/48927 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 15396 event pairs, 21 based on Foata normal form. 18/2672 useless extension candidates. Maximal degree in co-relation 23151. Up to 766 conditions per place. [2023-11-06 22:09:52,495 INFO L140 encePairwiseOnDemand]: 136/143 looper letters, 332 selfloop transitions, 450 changer transitions 0/782 dead transitions. [2023-11-06 22:09:52,496 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 782 transitions, 15582 flow [2023-11-06 22:09:52,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-11-06 22:09:52,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-11-06 22:09:52,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2303 transitions. [2023-11-06 22:09:52,502 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4352674352674353 [2023-11-06 22:09:52,502 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2303 transitions. [2023-11-06 22:09:52,502 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2303 transitions. [2023-11-06 22:09:52,503 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:09:52,504 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2303 transitions. [2023-11-06 22:09:52,509 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 62.24324324324324) internal successors, (2303), 37 states have internal predecessors, (2303), 0 states have call successors, (0), 0 states 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 22:09:52,518 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 143.0) internal successors, (5434), 38 states have internal predecessors, (5434), 0 states have call successors, (0), 0 states 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 22:09:52,519 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 143.0) internal successors, (5434), 38 states have internal predecessors, (5434), 0 states have call successors, (0), 0 states 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 22:09:52,519 INFO L175 Difference]: Start difference. First operand has 264 places, 615 transitions, 11739 flow. Second operand 37 states and 2303 transitions. [2023-11-06 22:09:52,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 782 transitions, 15582 flow [2023-11-06 22:09:53,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 782 transitions, 14652 flow, removed 410 selfloop flow, removed 8 redundant places. [2023-11-06 22:09:53,113 INFO L231 Difference]: Finished difference. Result has 295 places, 691 transitions, 13758 flow [2023-11-06 22:09:53,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=143, PETRI_DIFFERENCE_MINUEND_FLOW=11109, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=615, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=379, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=13758, PETRI_PLACES=295, PETRI_TRANSITIONS=691} [2023-11-06 22:09:53,115 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 275 predicate places. [2023-11-06 22:09:53,115 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 691 transitions, 13758 flow [2023-11-06 22:09:53,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 60.05) internal successors, (1201), 20 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 22:09:53,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:09:53,116 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:09:53,123 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-06 22:09:53,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-06 22:09:53,322 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:09:53,322 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:09:53,322 INFO L85 PathProgramCache]: Analyzing trace with hash -2036546049, now seen corresponding path program 16 times [2023-11-06 22:09:53,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:09:53,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380912592] [2023-11-06 22:09:53,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:09:53,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:09:53,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:09:53,492 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:09:53,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:09:53,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380912592] [2023-11-06 22:09:53,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380912592] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:09:53,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461821845] [2023-11-06 22:09:53,493 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:09:53,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:09:53,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:09:53,494 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:09:53,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-06 22:09:53,572 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:09:53,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:09:53,573 INFO L262 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 22:09:53,575 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:09:53,771 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:09:53,771 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:09:53,915 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:09:53,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461821845] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:09:53,916 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:09:53,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2023-11-06 22:09:53,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665289683] [2023-11-06 22:09:53,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:09:53,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-06 22:09:53,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:09:53,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-06 22:09:53,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2023-11-06 22:09:54,095 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 143 [2023-11-06 22:09:54,097 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 691 transitions, 13758 flow. Second operand has 20 states, 20 states have (on average 59.9) internal successors, (1198), 20 states have internal predecessors, (1198), 0 states have call successors, (0), 0 states 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 22:09:54,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:09:54,097 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 143 [2023-11-06 22:09:54,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:09:55,584 INFO L124 PetriNetUnfolderBase]: 1611/2798 cut-off events. [2023-11-06 22:09:55,584 INFO L125 PetriNetUnfolderBase]: For 43819/43819 co-relation queries the response was YES. [2023-11-06 22:09:55,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24998 conditions, 2798 events. 1611/2798 cut-off events. For 43819/43819 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 16618 event pairs, 27 based on Foata normal form. 46/2844 useless extension candidates. Maximal degree in co-relation 24439. Up to 987 conditions per place. [2023-11-06 22:09:55,617 INFO L140 encePairwiseOnDemand]: 136/143 looper letters, 285 selfloop transitions, 504 changer transitions 2/791 dead transitions. [2023-11-06 22:09:55,618 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 791 transitions, 16401 flow [2023-11-06 22:09:55,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-06 22:09:55,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-11-06 22:09:55,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 2120 transitions. [2023-11-06 22:09:55,622 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4360345536816125 [2023-11-06 22:09:55,622 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 2120 transitions. [2023-11-06 22:09:55,622 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 2120 transitions. [2023-11-06 22:09:55,623 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:09:55,623 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 2120 transitions. [2023-11-06 22:09:55,627 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 62.35294117647059) internal successors, (2120), 34 states have internal predecessors, (2120), 0 states have call successors, (0), 0 states 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 22:09:55,634 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 143.0) internal successors, (5005), 35 states have internal predecessors, (5005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:09:55,635 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 143.0) internal successors, (5005), 35 states have internal predecessors, (5005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:09:55,635 INFO L175 Difference]: Start difference. First operand has 295 places, 691 transitions, 13758 flow. Second operand 34 states and 2120 transitions. [2023-11-06 22:09:55,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 791 transitions, 16401 flow [2023-11-06 22:09:55,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 791 transitions, 15688 flow, removed 136 selfloop flow, removed 22 redundant places. [2023-11-06 22:09:56,007 INFO L231 Difference]: Finished difference. Result has 307 places, 715 transitions, 14952 flow [2023-11-06 22:09:56,008 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=143, PETRI_DIFFERENCE_MINUEND_FLOW=12939, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=682, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=472, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=14952, PETRI_PLACES=307, PETRI_TRANSITIONS=715} [2023-11-06 22:09:56,008 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 287 predicate places. [2023-11-06 22:09:56,008 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 715 transitions, 14952 flow [2023-11-06 22:09:56,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 59.9) internal successors, (1198), 20 states have internal predecessors, (1198), 0 states have call successors, (0), 0 states 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 22:09:56,009 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:09:56,009 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:09:56,018 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-06 22:09:56,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-06 22:09:56,214 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:09:56,214 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:09:56,214 INFO L85 PathProgramCache]: Analyzing trace with hash 1714616813, now seen corresponding path program 17 times [2023-11-06 22:09:56,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:09:56,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112299041] [2023-11-06 22:09:56,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:09:56,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:09:56,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:09:56,395 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:09:56,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:09:56,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112299041] [2023-11-06 22:09:56,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112299041] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:09:56,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808553549] [2023-11-06 22:09:56,396 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:09:56,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:09:56,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:09:56,397 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:09:56,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-06 22:09:56,487 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-06 22:09:56,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:09:56,488 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 22:09:56,489 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:09:56,634 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:09:56,634 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:09:56,923 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:09:56,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808553549] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:09:56,924 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:09:56,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2023-11-06 22:09:56,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777042489] [2023-11-06 22:09:56,924 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:09:56,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-06 22:09:56,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:09:56,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-06 22:09:56,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2023-11-06 22:09:57,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 143 [2023-11-06 22:09:57,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 715 transitions, 14952 flow. Second operand has 23 states, 23 states have (on average 60.130434782608695) internal successors, (1383), 23 states have internal predecessors, (1383), 0 states have call successors, (0), 0 states 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 22:09:57,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:09:57,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 143 [2023-11-06 22:09:57,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:09:59,094 INFO L124 PetriNetUnfolderBase]: 1886/3285 cut-off events. [2023-11-06 22:09:59,094 INFO L125 PetriNetUnfolderBase]: For 46887/46887 co-relation queries the response was YES. [2023-11-06 22:09:59,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29902 conditions, 3285 events. 1886/3285 cut-off events. For 46887/46887 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 20268 event pairs, 27 based on Foata normal form. 12/3297 useless extension candidates. Maximal degree in co-relation 29687. Up to 1031 conditions per place. [2023-11-06 22:09:59,133 INFO L140 encePairwiseOnDemand]: 136/143 looper letters, 280 selfloop transitions, 628 changer transitions 0/908 dead transitions. [2023-11-06 22:09:59,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 908 transitions, 19679 flow [2023-11-06 22:09:59,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-11-06 22:09:59,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-11-06 22:09:59,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2305 transitions. [2023-11-06 22:09:59,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4356454356454356 [2023-11-06 22:09:59,138 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2305 transitions. [2023-11-06 22:09:59,138 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2305 transitions. [2023-11-06 22:09:59,139 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:09:59,139 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2305 transitions. [2023-11-06 22:09:59,143 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 62.2972972972973) internal successors, (2305), 37 states have internal predecessors, (2305), 0 states have call successors, (0), 0 states 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 22:09:59,150 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 143.0) internal successors, (5434), 38 states have internal predecessors, (5434), 0 states have call successors, (0), 0 states 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 22:09:59,152 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 143.0) internal successors, (5434), 38 states have internal predecessors, (5434), 0 states have call successors, (0), 0 states 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 22:09:59,152 INFO L175 Difference]: Start difference. First operand has 307 places, 715 transitions, 14952 flow. Second operand 37 states and 2305 transitions. [2023-11-06 22:09:59,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 908 transitions, 19679 flow [2023-11-06 22:09:59,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 908 transitions, 19023 flow, removed 89 selfloop flow, removed 24 redundant places. [2023-11-06 22:09:59,658 INFO L231 Difference]: Finished difference. Result has 325 places, 832 transitions, 18634 flow [2023-11-06 22:09:59,659 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=143, PETRI_DIFFERENCE_MINUEND_FLOW=14424, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=715, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=520, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=18634, PETRI_PLACES=325, PETRI_TRANSITIONS=832} [2023-11-06 22:09:59,660 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 305 predicate places. [2023-11-06 22:09:59,660 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 832 transitions, 18634 flow [2023-11-06 22:09:59,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 60.130434782608695) internal successors, (1383), 23 states have internal predecessors, (1383), 0 states have call successors, (0), 0 states 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 22:09:59,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:09:59,661 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:09:59,666 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-06 22:09:59,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:09:59,866 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:09:59,866 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:09:59,866 INFO L85 PathProgramCache]: Analyzing trace with hash 428287229, now seen corresponding path program 18 times [2023-11-06 22:09:59,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:09:59,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200547405] [2023-11-06 22:09:59,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:09:59,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:09:59,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:10:00,049 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:10:00,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:10:00,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200547405] [2023-11-06 22:10:00,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200547405] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:10:00,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265517801] [2023-11-06 22:10:00,053 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:10:00,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:10:00,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:10:00,055 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:10:00,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-06 22:10:00,149 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-11-06 22:10:00,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:10:00,150 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 22:10:00,151 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:10:00,267 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:10:00,267 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:10:00,471 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:10:00,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265517801] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:10:00,471 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:10:00,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2023-11-06 22:10:00,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217271957] [2023-11-06 22:10:00,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:10:00,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-06 22:10:00,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:10:00,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-06 22:10:00,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2023-11-06 22:10:00,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 143 [2023-11-06 22:10:00,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 832 transitions, 18634 flow. Second operand has 23 states, 23 states have (on average 59.869565217391305) internal successors, (1377), 23 states have internal predecessors, (1377), 0 states have call successors, (0), 0 states 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 22:10:00,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:10:00,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 143 [2023-11-06 22:10:00,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:10:02,632 INFO L124 PetriNetUnfolderBase]: 2250/3915 cut-off events. [2023-11-06 22:10:02,632 INFO L125 PetriNetUnfolderBase]: For 63083/63083 co-relation queries the response was YES. [2023-11-06 22:10:02,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37752 conditions, 3915 events. 2250/3915 cut-off events. For 63083/63083 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 24963 event pairs, 17 based on Foata normal form. 36/3951 useless extension candidates. Maximal degree in co-relation 37529. Up to 1080 conditions per place. [2023-11-06 22:10:02,680 INFO L140 encePairwiseOnDemand]: 136/143 looper letters, 215 selfloop transitions, 845 changer transitions 12/1072 dead transitions. [2023-11-06 22:10:02,680 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 1072 transitions, 25184 flow [2023-11-06 22:10:02,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-11-06 22:10:02,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-11-06 22:10:02,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2241 transitions. [2023-11-06 22:10:02,686 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4353146853146853 [2023-11-06 22:10:02,686 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2241 transitions. [2023-11-06 22:10:02,686 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2241 transitions. [2023-11-06 22:10:02,687 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:10:02,687 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2241 transitions. [2023-11-06 22:10:02,691 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 62.25) internal successors, (2241), 36 states have internal predecessors, (2241), 0 states have call successors, (0), 0 states 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 22:10:02,698 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 143.0) internal successors, (5291), 37 states have internal predecessors, (5291), 0 states have call successors, (0), 0 states 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 22:10:02,699 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 143.0) internal successors, (5291), 37 states have internal predecessors, (5291), 0 states have call successors, (0), 0 states 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 22:10:02,700 INFO L175 Difference]: Start difference. First operand has 325 places, 832 transitions, 18634 flow. Second operand 36 states and 2241 transitions. [2023-11-06 22:10:02,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 1072 transitions, 25184 flow [2023-11-06 22:10:03,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 1072 transitions, 24782 flow, removed 140 selfloop flow, removed 11 redundant places. [2023-11-06 22:10:03,355 INFO L231 Difference]: Finished difference. Result has 360 places, 995 transitions, 24551 flow [2023-11-06 22:10:03,357 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=143, PETRI_DIFFERENCE_MINUEND_FLOW=18294, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=832, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=686, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=24551, PETRI_PLACES=360, PETRI_TRANSITIONS=995} [2023-11-06 22:10:03,357 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 340 predicate places. [2023-11-06 22:10:03,357 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 995 transitions, 24551 flow [2023-11-06 22:10:03,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 59.869565217391305) internal successors, (1377), 23 states have internal predecessors, (1377), 0 states have call successors, (0), 0 states 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 22:10:03,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:10:03,358 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:10:03,368 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-06 22:10:03,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:10:03,563 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:10:03,564 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:10:03,564 INFO L85 PathProgramCache]: Analyzing trace with hash -739376961, now seen corresponding path program 19 times [2023-11-06 22:10:03,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:10:03,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096912678] [2023-11-06 22:10:03,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:10:03,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:10:03,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:10:03,760 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:10:03,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:10:03,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096912678] [2023-11-06 22:10:03,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096912678] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:10:03,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745384456] [2023-11-06 22:10:03,761 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 22:10:03,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:10:03,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:10:03,762 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:10:03,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-06 22:10:03,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:10:03,842 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 22:10:03,845 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:10:03,996 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:10:03,996 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:10:04,247 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:10:04,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745384456] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:10:04,248 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:10:04,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-11-06 22:10:04,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537875352] [2023-11-06 22:10:04,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:10:04,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-06 22:10:04,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:10:04,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-06 22:10:04,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=428, Unknown=0, NotChecked=0, Total=552 [2023-11-06 22:10:04,396 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 143 [2023-11-06 22:10:04,398 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 995 transitions, 24551 flow. Second operand has 24 states, 24 states have (on average 59.958333333333336) internal successors, (1439), 24 states have internal predecessors, (1439), 0 states have call successors, (0), 0 states 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 22:10:04,398 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:10:04,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 143 [2023-11-06 22:10:04,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:10:07,489 INFO L124 PetriNetUnfolderBase]: 3071/5350 cut-off events. [2023-11-06 22:10:07,489 INFO L125 PetriNetUnfolderBase]: For 107642/107642 co-relation queries the response was YES. [2023-11-06 22:10:07,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55964 conditions, 5350 events. 3071/5350 cut-off events. For 107642/107642 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 36246 event pairs, 39 based on Foata normal form. 68/5418 useless extension candidates. Maximal degree in co-relation 55727. Up to 1398 conditions per place. [2023-11-06 22:10:07,554 INFO L140 encePairwiseOnDemand]: 136/143 looper letters, 483 selfloop transitions, 951 changer transitions 20/1454 dead transitions. [2023-11-06 22:10:07,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 1454 transitions, 37492 flow [2023-11-06 22:10:07,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-11-06 22:10:07,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2023-11-06 22:10:07,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 2678 transitions. [2023-11-06 22:10:07,558 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4355179704016913 [2023-11-06 22:10:07,559 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 2678 transitions. [2023-11-06 22:10:07,559 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 2678 transitions. [2023-11-06 22:10:07,560 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:10:07,560 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 2678 transitions. [2023-11-06 22:10:07,565 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 62.27906976744186) internal successors, (2678), 43 states have internal predecessors, (2678), 0 states have call successors, (0), 0 states 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 22:10:07,571 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 143.0) internal successors, (6292), 44 states have internal predecessors, (6292), 0 states have call successors, (0), 0 states 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 22:10:07,573 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 143.0) internal successors, (6292), 44 states have internal predecessors, (6292), 0 states have call successors, (0), 0 states 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 22:10:07,574 INFO L175 Difference]: Start difference. First operand has 360 places, 995 transitions, 24551 flow. Second operand 43 states and 2678 transitions. [2023-11-06 22:10:07,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 1454 transitions, 37492 flow [2023-11-06 22:10:08,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 1454 transitions, 36853 flow, removed 204 selfloop flow, removed 16 redundant places. [2023-11-06 22:10:08,908 INFO L231 Difference]: Finished difference. Result has 398 places, 1355 transitions, 36405 flow [2023-11-06 22:10:08,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=143, PETRI_DIFFERENCE_MINUEND_FLOW=23995, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=990, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=600, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=36405, PETRI_PLACES=398, PETRI_TRANSITIONS=1355} [2023-11-06 22:10:08,910 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 378 predicate places. [2023-11-06 22:10:08,910 INFO L495 AbstractCegarLoop]: Abstraction has has 398 places, 1355 transitions, 36405 flow [2023-11-06 22:10:08,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 59.958333333333336) internal successors, (1439), 24 states have internal predecessors, (1439), 0 states have call successors, (0), 0 states 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 22:10:08,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:10:08,910 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:10:08,914 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-11-06 22:10:09,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:10:09,111 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:10:09,111 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:10:09,111 INFO L85 PathProgramCache]: Analyzing trace with hash -254061609, now seen corresponding path program 20 times [2023-11-06 22:10:09,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:10:09,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685545153] [2023-11-06 22:10:09,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:10:09,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:10:09,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:10:09,276 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:10:09,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:10:09,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685545153] [2023-11-06 22:10:09,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685545153] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:10:09,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651339649] [2023-11-06 22:10:09,277 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:10:09,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:10:09,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:10:09,279 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:10:09,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-06 22:10:09,375 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:10:09,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:10:09,377 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 22:10:09,378 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:10:09,511 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:10:09,511 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:10:09,694 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:10:09,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651339649] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:10:09,695 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:10:09,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 23 [2023-11-06 22:10:09,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4604592] [2023-11-06 22:10:09,696 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:10:09,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-06 22:10:09,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:10:09,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-06 22:10:09,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2023-11-06 22:10:09,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 143 [2023-11-06 22:10:09,887 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 1355 transitions, 36405 flow. Second operand has 23 states, 23 states have (on average 59.869565217391305) internal successors, (1377), 23 states have internal predecessors, (1377), 0 states have call successors, (0), 0 states 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 22:10:09,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:10:09,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 143 [2023-11-06 22:10:09,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:10:13,449 INFO L124 PetriNetUnfolderBase]: 3147/5504 cut-off events. [2023-11-06 22:10:13,449 INFO L125 PetriNetUnfolderBase]: For 127812/127812 co-relation queries the response was YES. [2023-11-06 22:10:13,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61395 conditions, 5504 events. 3147/5504 cut-off events. For 127812/127812 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 37652 event pairs, 135 based on Foata normal form. 58/5562 useless extension candidates. Maximal degree in co-relation 61135. Up to 4808 conditions per place. [2023-11-06 22:10:13,517 INFO L140 encePairwiseOnDemand]: 136/143 looper letters, 1279 selfloop transitions, 179 changer transitions 18/1476 dead transitions. [2023-11-06 22:10:13,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 426 places, 1476 transitions, 41312 flow [2023-11-06 22:10:13,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-06 22:10:13,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-11-06 22:10:13,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1815 transitions. [2023-11-06 22:10:13,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4376657824933687 [2023-11-06 22:10:13,520 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1815 transitions. [2023-11-06 22:10:13,520 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1815 transitions. [2023-11-06 22:10:13,521 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:10:13,521 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1815 transitions. [2023-11-06 22:10:13,523 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 62.58620689655172) internal successors, (1815), 29 states have internal predecessors, (1815), 0 states have call successors, (0), 0 states 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 22:10:13,527 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 143.0) internal successors, (4290), 30 states have internal predecessors, (4290), 0 states have call successors, (0), 0 states 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 22:10:13,528 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 143.0) internal successors, (4290), 30 states have internal predecessors, (4290), 0 states have call successors, (0), 0 states 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 22:10:13,528 INFO L175 Difference]: Start difference. First operand has 398 places, 1355 transitions, 36405 flow. Second operand 29 states and 1815 transitions. [2023-11-06 22:10:13,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 426 places, 1476 transitions, 41312 flow [2023-11-06 22:10:15,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 1476 transitions, 40788 flow, removed 176 selfloop flow, removed 18 redundant places. [2023-11-06 22:10:15,697 INFO L231 Difference]: Finished difference. Result has 418 places, 1396 transitions, 37663 flow [2023-11-06 22:10:15,699 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=143, PETRI_DIFFERENCE_MINUEND_FLOW=35741, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=37663, PETRI_PLACES=418, PETRI_TRANSITIONS=1396} [2023-11-06 22:10:15,700 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 398 predicate places. [2023-11-06 22:10:15,700 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 1396 transitions, 37663 flow [2023-11-06 22:10:15,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 59.869565217391305) internal successors, (1377), 23 states have internal predecessors, (1377), 0 states have call successors, (0), 0 states 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 22:10:15,701 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:10:15,701 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:10:15,711 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-11-06 22:10:15,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-11-06 22:10:15,906 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:10:15,906 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:10:15,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1699694887, now seen corresponding path program 21 times [2023-11-06 22:10:15,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:10:15,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288683641] [2023-11-06 22:10:15,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:10:15,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:10:15,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:10:16,051 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:10:16,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:10:16,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288683641] [2023-11-06 22:10:16,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288683641] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:10:16,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35157442] [2023-11-06 22:10:16,052 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:10:16,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:10:16,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:10:16,053 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:10:16,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-06 22:10:16,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-06 22:10:16,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:10:16,145 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-06 22:10:16,146 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:10:16,260 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:10:16,260 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:10:16,441 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:10:16,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35157442] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:10:16,441 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:10:16,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 22 [2023-11-06 22:10:16,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421282661] [2023-11-06 22:10:16,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:10:16,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-06 22:10:16,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:10:16,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-06 22:10:16,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=341, Unknown=0, NotChecked=0, Total=462 [2023-11-06 22:10:16,621 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 143 [2023-11-06 22:10:16,622 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 1396 transitions, 37663 flow. Second operand has 22 states, 22 states have (on average 59.90909090909091) internal successors, (1318), 22 states have internal predecessors, (1318), 0 states have call successors, (0), 0 states 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 22:10:16,622 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:10:16,623 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 143 [2023-11-06 22:10:16,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:10:20,201 INFO L124 PetriNetUnfolderBase]: 3218/5575 cut-off events. [2023-11-06 22:10:20,201 INFO L125 PetriNetUnfolderBase]: For 121655/121655 co-relation queries the response was YES. [2023-11-06 22:10:20,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62781 conditions, 5575 events. 3218/5575 cut-off events. For 121655/121655 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 37771 event pairs, 143 based on Foata normal form. 28/5603 useless extension candidates. Maximal degree in co-relation 62511. Up to 5003 conditions per place. [2023-11-06 22:10:20,294 INFO L140 encePairwiseOnDemand]: 136/143 looper letters, 1275 selfloop transitions, 202 changer transitions 4/1481 dead transitions. [2023-11-06 22:10:20,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 1481 transitions, 42233 flow [2023-11-06 22:10:20,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-06 22:10:20,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-06 22:10:20,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1491 transitions. [2023-11-06 22:10:20,296 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4344405594405594 [2023-11-06 22:10:20,296 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1491 transitions. [2023-11-06 22:10:20,296 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1491 transitions. [2023-11-06 22:10:20,297 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:10:20,297 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1491 transitions. [2023-11-06 22:10:20,299 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 62.125) internal successors, (1491), 24 states have internal predecessors, (1491), 0 states have call successors, (0), 0 states 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 22:10:20,303 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 143.0) internal successors, (3575), 25 states have internal predecessors, (3575), 0 states have call successors, (0), 0 states 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 22:10:20,304 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 143.0) internal successors, (3575), 25 states have internal predecessors, (3575), 0 states have call successors, (0), 0 states 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 22:10:20,304 INFO L175 Difference]: Start difference. First operand has 418 places, 1396 transitions, 37663 flow. Second operand 24 states and 1491 transitions. [2023-11-06 22:10:20,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 1481 transitions, 42233 flow [2023-11-06 22:10:22,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 1481 transitions, 41543 flow, removed 160 selfloop flow, removed 17 redundant places. [2023-11-06 22:10:22,501 INFO L231 Difference]: Finished difference. Result has 432 places, 1441 transitions, 38908 flow [2023-11-06 22:10:22,503 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=143, PETRI_DIFFERENCE_MINUEND_FLOW=36801, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=38908, PETRI_PLACES=432, PETRI_TRANSITIONS=1441} [2023-11-06 22:10:22,504 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 412 predicate places. [2023-11-06 22:10:22,504 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 1441 transitions, 38908 flow [2023-11-06 22:10:22,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 59.90909090909091) internal successors, (1318), 22 states have internal predecessors, (1318), 0 states have call successors, (0), 0 states 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 22:10:22,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:10:22,505 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:10:22,515 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-11-06 22:10:22,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-11-06 22:10:22,710 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:10:22,710 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:10:22,711 INFO L85 PathProgramCache]: Analyzing trace with hash 401897658, now seen corresponding path program 22 times [2023-11-06 22:10:22,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:10:22,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352008623] [2023-11-06 22:10:22,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:10:22,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:10:22,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:10:22,832 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:10:22,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:10:22,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352008623] [2023-11-06 22:10:22,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352008623] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:10:22,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131783251] [2023-11-06 22:10:22,833 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:10:22,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:10:22,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:10:22,835 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:10:22,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-06 22:10:22,926 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:10:22,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:10:22,927 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-06 22:10:22,929 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:10:22,965 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:10:22,965 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:10:23,111 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:10:23,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131783251] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:10:23,111 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:10:23,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 6] total 10 [2023-11-06 22:10:23,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383885200] [2023-11-06 22:10:23,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:10:23,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 22:10:23,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:10:23,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 22:10:23,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2023-11-06 22:10:23,195 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 143 [2023-11-06 22:10:23,196 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 1441 transitions, 38908 flow. Second operand has 12 states, 12 states have (on average 66.0) internal successors, (792), 12 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:10:23,196 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:10:23,196 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 143 [2023-11-06 22:10:23,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:10:27,991 INFO L124 PetriNetUnfolderBase]: 4358/7520 cut-off events. [2023-11-06 22:10:27,991 INFO L125 PetriNetUnfolderBase]: For 163330/163330 co-relation queries the response was YES. [2023-11-06 22:10:28,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84977 conditions, 7520 events. 4358/7520 cut-off events. For 163330/163330 co-relation queries the response was YES. Maximal size of possible extension queue 572. Compared 53547 event pairs, 130 based on Foata normal form. 1/7519 useless extension candidates. Maximal degree in co-relation 84613. Up to 4219 conditions per place. [2023-11-06 22:10:28,145 INFO L140 encePairwiseOnDemand]: 139/143 looper letters, 1300 selfloop transitions, 618 changer transitions 101/2022 dead transitions. [2023-11-06 22:10:28,145 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 2022 transitions, 58005 flow [2023-11-06 22:10:28,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 22:10:28,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-06 22:10:28,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 506 transitions. [2023-11-06 22:10:28,147 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5054945054945055 [2023-11-06 22:10:28,147 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 506 transitions. [2023-11-06 22:10:28,147 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 506 transitions. [2023-11-06 22:10:28,147 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:10:28,147 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 506 transitions. [2023-11-06 22:10:28,148 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 72.28571428571429) internal successors, (506), 7 states have internal predecessors, (506), 0 states have call successors, (0), 0 states 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 22:10:28,149 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 143.0) internal successors, (1144), 8 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states 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 22:10:28,149 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 143.0) internal successors, (1144), 8 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states 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 22:10:28,149 INFO L175 Difference]: Start difference. First operand has 432 places, 1441 transitions, 38908 flow. Second operand 7 states and 506 transitions. [2023-11-06 22:10:28,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 2022 transitions, 58005 flow [2023-11-06 22:10:31,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 2022 transitions, 57429 flow, removed 213 selfloop flow, removed 10 redundant places. [2023-11-06 22:10:31,390 INFO L231 Difference]: Finished difference. Result has 431 places, 1733 transitions, 48915 flow [2023-11-06 22:10:31,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=143, PETRI_DIFFERENCE_MINUEND_FLOW=38536, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=302, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=823, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=48915, PETRI_PLACES=431, PETRI_TRANSITIONS=1733} [2023-11-06 22:10:31,392 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 411 predicate places. [2023-11-06 22:10:31,392 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 1733 transitions, 48915 flow [2023-11-06 22:10:31,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 66.0) internal successors, (792), 12 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:10:31,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:10:31,393 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:10:31,397 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-11-06 22:10:31,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-06 22:10:31,593 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:10:31,594 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:10:31,594 INFO L85 PathProgramCache]: Analyzing trace with hash 1206731174, now seen corresponding path program 23 times [2023-11-06 22:10:31,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:10:31,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217875588] [2023-11-06 22:10:31,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:10:31,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:10:31,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:10:31,934 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:10:31,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:10:31,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217875588] [2023-11-06 22:10:31,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217875588] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:10:31,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31178476] [2023-11-06 22:10:31,935 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:10:31,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:10:31,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:10:31,937 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:10:31,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-06 22:10:32,029 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-11-06 22:10:32,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:10:32,030 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 22:10:32,032 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:10:32,102 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:10:32,102 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:10:32,257 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:10:32,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31178476] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:10:32,258 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:10:32,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6, 6] total 18 [2023-11-06 22:10:32,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519050182] [2023-11-06 22:10:32,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:10:32,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-06 22:10:32,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:10:32,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-06 22:10:32,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2023-11-06 22:10:32,414 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 143 [2023-11-06 22:10:32,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 1733 transitions, 48915 flow. Second operand has 19 states, 19 states have (on average 60.10526315789474) internal successors, (1142), 19 states have internal predecessors, (1142), 0 states have call successors, (0), 0 states 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 22:10:32,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:10:32,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 143 [2023-11-06 22:10:32,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:10:39,020 INFO L124 PetriNetUnfolderBase]: 4539/7899 cut-off events. [2023-11-06 22:10:39,020 INFO L125 PetriNetUnfolderBase]: For 213713/213713 co-relation queries the response was YES. [2023-11-06 22:10:39,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94136 conditions, 7899 events. 4539/7899 cut-off events. For 213713/213713 co-relation queries the response was YES. Maximal size of possible extension queue 619. Compared 57381 event pairs, 121 based on Foata normal form. 94/7993 useless extension candidates. Maximal degree in co-relation 93674. Up to 5511 conditions per place. [2023-11-06 22:10:39,130 INFO L140 encePairwiseOnDemand]: 136/143 looper letters, 1438 selfloop transitions, 548 changer transitions 48/2034 dead transitions. [2023-11-06 22:10:39,130 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 464 places, 2034 transitions, 59881 flow [2023-11-06 22:10:39,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-06 22:10:39,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-11-06 22:10:39,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 2156 transitions. [2023-11-06 22:10:39,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4434389140271493 [2023-11-06 22:10:39,134 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 2156 transitions. [2023-11-06 22:10:39,134 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 2156 transitions. [2023-11-06 22:10:39,134 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:10:39,134 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 2156 transitions. [2023-11-06 22:10:39,137 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 63.411764705882355) internal successors, (2156), 34 states have internal predecessors, (2156), 0 states have call successors, (0), 0 states 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 22:10:39,142 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 143.0) internal successors, (5005), 35 states have internal predecessors, (5005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:10:39,143 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 143.0) internal successors, (5005), 35 states have internal predecessors, (5005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:10:39,143 INFO L175 Difference]: Start difference. First operand has 431 places, 1733 transitions, 48915 flow. Second operand 34 states and 2156 transitions. [2023-11-06 22:10:39,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 464 places, 2034 transitions, 59881 flow [2023-11-06 22:10:42,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 460 places, 2034 transitions, 59405 flow, removed 147 selfloop flow, removed 4 redundant places. [2023-11-06 22:10:42,732 INFO L231 Difference]: Finished difference. Result has 472 places, 1865 transitions, 54360 flow [2023-11-06 22:10:42,734 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=143, PETRI_DIFFERENCE_MINUEND_FLOW=48524, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1732, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=424, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=54360, PETRI_PLACES=472, PETRI_TRANSITIONS=1865} [2023-11-06 22:10:42,734 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 452 predicate places. [2023-11-06 22:10:42,734 INFO L495 AbstractCegarLoop]: Abstraction has has 472 places, 1865 transitions, 54360 flow [2023-11-06 22:10:42,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 60.10526315789474) internal successors, (1142), 19 states have internal predecessors, (1142), 0 states have call successors, (0), 0 states 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 22:10:42,735 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:10:42,735 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:10:42,743 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-11-06 22:10:42,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-11-06 22:10:42,936 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:10:42,936 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:10:42,936 INFO L85 PathProgramCache]: Analyzing trace with hash -940762416, now seen corresponding path program 24 times [2023-11-06 22:10:42,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:10:42,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054693585] [2023-11-06 22:10:42,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:10:42,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:10:42,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:10:43,146 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:10:43,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:10:43,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054693585] [2023-11-06 22:10:43,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054693585] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:10:43,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713835333] [2023-11-06 22:10:43,147 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:10:43,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:10:43,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:10:43,151 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:10:43,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-06 22:10:43,253 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-06 22:10:43,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:10:43,254 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-06 22:10:43,256 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:10:43,454 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:10:43,455 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:10:43,820 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:10:43,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713835333] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:10:43,821 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:10:43,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2023-11-06 22:10:43,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147948757] [2023-11-06 22:10:43,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:10:43,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-06 22:10:43,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:10:43,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-06 22:10:43,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2023-11-06 22:10:44,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 143 [2023-11-06 22:10:44,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 472 places, 1865 transitions, 54360 flow. Second operand has 25 states, 25 states have (on average 59.88) internal successors, (1497), 25 states have internal predecessors, (1497), 0 states have call successors, (0), 0 states 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 22:10:44,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:10:44,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 143 [2023-11-06 22:10:44,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:10:52,380 INFO L124 PetriNetUnfolderBase]: 4953/8623 cut-off events. [2023-11-06 22:10:52,380 INFO L125 PetriNetUnfolderBase]: For 270647/270647 co-relation queries the response was YES. [2023-11-06 22:10:52,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105268 conditions, 8623 events. 4953/8623 cut-off events. For 270647/270647 co-relation queries the response was YES. Maximal size of possible extension queue 669. Compared 63279 event pairs, 149 based on Foata normal form. 160/8783 useless extension candidates. Maximal degree in co-relation 104904. Up to 6419 conditions per place. [2023-11-06 22:10:52,567 INFO L140 encePairwiseOnDemand]: 136/143 looper letters, 1652 selfloop transitions, 479 changer transitions 19/2150 dead transitions. [2023-11-06 22:10:52,567 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 498 places, 2150 transitions, 66198 flow [2023-11-06 22:10:52,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-06 22:10:52,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-11-06 22:10:52,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1938 transitions. [2023-11-06 22:10:52,572 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43717572749830813 [2023-11-06 22:10:52,573 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1938 transitions. [2023-11-06 22:10:52,573 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1938 transitions. [2023-11-06 22:10:52,574 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:10:52,574 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1938 transitions. [2023-11-06 22:10:52,578 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 62.516129032258064) internal successors, (1938), 31 states have internal predecessors, (1938), 0 states have call successors, (0), 0 states 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 22:10:52,583 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 143.0) internal successors, (4576), 32 states have internal predecessors, (4576), 0 states have call successors, (0), 0 states 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 22:10:52,584 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 143.0) internal successors, (4576), 32 states have internal predecessors, (4576), 0 states have call successors, (0), 0 states 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 22:10:52,584 INFO L175 Difference]: Start difference. First operand has 472 places, 1865 transitions, 54360 flow. Second operand 31 states and 1938 transitions. [2023-11-06 22:10:52,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 498 places, 2150 transitions, 66198 flow [2023-11-06 22:10:57,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 482 places, 2150 transitions, 63791 flow, removed 500 selfloop flow, removed 16 redundant places. [2023-11-06 22:10:57,090 INFO L231 Difference]: Finished difference. Result has 496 places, 2058 transitions, 59948 flow [2023-11-06 22:10:57,092 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=143, PETRI_DIFFERENCE_MINUEND_FLOW=52166, PETRI_DIFFERENCE_MINUEND_PLACES=452, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1857, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=304, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1512, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=59948, PETRI_PLACES=496, PETRI_TRANSITIONS=2058} [2023-11-06 22:10:57,092 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 476 predicate places. [2023-11-06 22:10:57,093 INFO L495 AbstractCegarLoop]: Abstraction has has 496 places, 2058 transitions, 59948 flow [2023-11-06 22:10:57,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 59.88) internal successors, (1497), 25 states have internal predecessors, (1497), 0 states have call successors, (0), 0 states 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 22:10:57,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:10:57,093 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:10:57,099 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-11-06 22:10:57,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-06 22:10:57,299 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:10:57,299 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:10:57,299 INFO L85 PathProgramCache]: Analyzing trace with hash 1792945619, now seen corresponding path program 25 times [2023-11-06 22:10:57,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:10:57,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454108973] [2023-11-06 22:10:57,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:10:57,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:10:57,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:10:57,549 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:10:57,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:10:57,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454108973] [2023-11-06 22:10:57,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454108973] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:10:57,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500730915] [2023-11-06 22:10:57,550 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 22:10:57,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:10:57,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:10:57,551 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:10:57,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-06 22:10:57,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:10:57,632 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-06 22:10:57,633 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:10:57,768 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:10:57,768 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:10:58,227 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:10:58,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500730915] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:10:58,227 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:10:58,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2023-11-06 22:10:58,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238436539] [2023-11-06 22:10:58,228 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:10:58,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-06 22:10:58,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:10:58,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-06 22:10:58,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2023-11-06 22:10:58,459 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 143 [2023-11-06 22:10:58,460 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 496 places, 2058 transitions, 59948 flow. Second operand has 26 states, 26 states have (on average 59.96153846153846) internal successors, (1559), 26 states have internal predecessors, (1559), 0 states have call successors, (0), 0 states 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 22:10:58,460 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:10:58,461 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 143 [2023-11-06 22:10:58,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:11:09,771 INFO L124 PetriNetUnfolderBase]: 6021/10512 cut-off events. [2023-11-06 22:11:09,771 INFO L125 PetriNetUnfolderBase]: For 279254/279254 co-relation queries the response was YES. [2023-11-06 22:11:09,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126785 conditions, 10512 events. 6021/10512 cut-off events. For 279254/279254 co-relation queries the response was YES. Maximal size of possible extension queue 779. Compared 79694 event pairs, 58 based on Foata normal form. 26/10538 useless extension candidates. Maximal degree in co-relation 126378. Up to 3601 conditions per place. [2023-11-06 22:11:10,026 INFO L140 encePairwiseOnDemand]: 136/143 looper letters, 514 selfloop transitions, 2333 changer transitions 44/2891 dead transitions. [2023-11-06 22:11:10,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 541 places, 2891 transitions, 87692 flow [2023-11-06 22:11:10,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-11-06 22:11:10,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2023-11-06 22:11:10,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 2878 transitions. [2023-11-06 22:11:10,033 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43751900273639405 [2023-11-06 22:11:10,033 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 2878 transitions. [2023-11-06 22:11:10,033 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 2878 transitions. [2023-11-06 22:11:10,034 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:11:10,035 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 2878 transitions. [2023-11-06 22:11:10,041 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 62.56521739130435) internal successors, (2878), 46 states have internal predecessors, (2878), 0 states have call successors, (0), 0 states 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 22:11:10,048 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 143.0) internal successors, (6721), 47 states have internal predecessors, (6721), 0 states have call successors, (0), 0 states 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 22:11:10,049 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 143.0) internal successors, (6721), 47 states have internal predecessors, (6721), 0 states have call successors, (0), 0 states 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 22:11:10,050 INFO L175 Difference]: Start difference. First operand has 496 places, 2058 transitions, 59948 flow. Second operand 46 states and 2878 transitions. [2023-11-06 22:11:10,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 541 places, 2891 transitions, 87692 flow [2023-11-06 22:11:15,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 524 places, 2891 transitions, 86089 flow, removed 656 selfloop flow, removed 17 redundant places. [2023-11-06 22:11:15,879 INFO L231 Difference]: Finished difference. Result has 535 places, 2675 transitions, 84171 flow [2023-11-06 22:11:15,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=143, PETRI_DIFFERENCE_MINUEND_FLOW=58668, PETRI_DIFFERENCE_MINUEND_PLACES=479, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2058, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1717, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=84171, PETRI_PLACES=535, PETRI_TRANSITIONS=2675} [2023-11-06 22:11:15,881 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 515 predicate places. [2023-11-06 22:11:15,881 INFO L495 AbstractCegarLoop]: Abstraction has has 535 places, 2675 transitions, 84171 flow [2023-11-06 22:11:15,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 59.96153846153846) internal successors, (1559), 26 states have internal predecessors, (1559), 0 states have call successors, (0), 0 states 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 22:11:15,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:11:15,882 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:11:15,886 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-11-06 22:11:16,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-06 22:11:16,082 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:11:16,082 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:11:16,082 INFO L85 PathProgramCache]: Analyzing trace with hash 629823325, now seen corresponding path program 26 times [2023-11-06 22:11:16,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:11:16,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801693223] [2023-11-06 22:11:16,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:11:16,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:11:16,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:11:16,288 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:11:16,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:11:16,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801693223] [2023-11-06 22:11:16,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801693223] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:11:16,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86121751] [2023-11-06 22:11:16,289 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:11:16,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:11:16,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:11:16,290 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:11:16,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-06 22:11:16,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:11:16,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:11:16,391 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-06 22:11:16,392 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:11:16,523 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:11:16,523 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:11:16,834 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:11:16,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86121751] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:11:16,834 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:11:16,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2023-11-06 22:11:16,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098324093] [2023-11-06 22:11:16,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:11:16,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-06 22:11:16,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:11:16,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-06 22:11:16,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=555, Unknown=0, NotChecked=0, Total=702 [2023-11-06 22:11:16,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 143 [2023-11-06 22:11:16,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 535 places, 2675 transitions, 84171 flow. Second operand has 27 states, 27 states have (on average 59.925925925925924) internal successors, (1618), 27 states have internal predecessors, (1618), 0 states have call successors, (0), 0 states 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 22:11:16,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:11:16,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 143 [2023-11-06 22:11:16,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:11:31,934 INFO L124 PetriNetUnfolderBase]: 6620/11460 cut-off events. [2023-11-06 22:11:31,935 INFO L125 PetriNetUnfolderBase]: For 322355/322355 co-relation queries the response was YES. [2023-11-06 22:11:32,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147288 conditions, 11460 events. 6620/11460 cut-off events. For 322355/322355 co-relation queries the response was YES. Maximal size of possible extension queue 824. Compared 87206 event pairs, 87 based on Foata normal form. 44/11504 useless extension candidates. Maximal degree in co-relation 146793. Up to 3530 conditions per place. [2023-11-06 22:11:32,161 INFO L140 encePairwiseOnDemand]: 136/143 looper letters, 560 selfloop transitions, 2532 changer transitions 28/3120 dead transitions. [2023-11-06 22:11:32,162 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 584 places, 3120 transitions, 101782 flow [2023-11-06 22:11:32,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-11-06 22:11:32,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2023-11-06 22:11:32,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 3177 transitions. [2023-11-06 22:11:32,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4356232003290827 [2023-11-06 22:11:32,167 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 3177 transitions. [2023-11-06 22:11:32,167 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 3177 transitions. [2023-11-06 22:11:32,168 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:11:32,168 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 3177 transitions. [2023-11-06 22:11:32,172 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 62.294117647058826) internal successors, (3177), 51 states have internal predecessors, (3177), 0 states have call successors, (0), 0 states 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 22:11:32,183 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 143.0) internal successors, (7436), 52 states have internal predecessors, (7436), 0 states have call successors, (0), 0 states 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 22:11:32,184 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 143.0) internal successors, (7436), 52 states have internal predecessors, (7436), 0 states have call successors, (0), 0 states 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 22:11:32,185 INFO L175 Difference]: Start difference. First operand has 535 places, 2675 transitions, 84171 flow. Second operand 51 states and 3177 transitions. [2023-11-06 22:11:32,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 584 places, 3120 transitions, 101782 flow [2023-11-06 22:11:40,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 571 places, 3120 transitions, 99614 flow, removed 1007 selfloop flow, removed 13 redundant places. [2023-11-06 22:11:40,285 INFO L231 Difference]: Finished difference. Result has 582 places, 2945 transitions, 97155 flow [2023-11-06 22:11:40,287 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=143, PETRI_DIFFERENCE_MINUEND_FLOW=82537, PETRI_DIFFERENCE_MINUEND_PLACES=521, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2675, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2261, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=97155, PETRI_PLACES=582, PETRI_TRANSITIONS=2945} [2023-11-06 22:11:40,288 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 562 predicate places. [2023-11-06 22:11:40,288 INFO L495 AbstractCegarLoop]: Abstraction has has 582 places, 2945 transitions, 97155 flow [2023-11-06 22:11:40,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 59.925925925925924) internal successors, (1618), 27 states have internal predecessors, (1618), 0 states have call successors, (0), 0 states 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 22:11:40,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:11:40,289 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:11:40,300 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-11-06 22:11:40,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-06 22:11:40,500 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:11:40,500 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:11:40,500 INFO L85 PathProgramCache]: Analyzing trace with hash -598802861, now seen corresponding path program 27 times [2023-11-06 22:11:40,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:11:40,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864696908] [2023-11-06 22:11:40,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:11:40,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:11:40,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:11:40,722 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:11:40,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:11:40,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864696908] [2023-11-06 22:11:40,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864696908] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:11:40,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545663272] [2023-11-06 22:11:40,723 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:11:40,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:11:40,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:11:40,727 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:11:40,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-06 22:11:40,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-06 22:11:40,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:11:40,813 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-06 22:11:40,814 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:11:40,944 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:11:40,944 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:11:41,283 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:11:41,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545663272] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:11:41,284 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:11:41,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2023-11-06 22:11:41,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64370028] [2023-11-06 22:11:41,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:11:41,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-06 22:11:41,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:11:41,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-06 22:11:41,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=550, Unknown=0, NotChecked=0, Total=702 [2023-11-06 22:11:41,468 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 143 [2023-11-06 22:11:41,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 582 places, 2945 transitions, 97155 flow. Second operand has 27 states, 27 states have (on average 59.888888888888886) internal successors, (1617), 27 states have internal predecessors, (1617), 0 states have call successors, (0), 0 states 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 22:11:41,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:11:41,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 143 [2023-11-06 22:11:41,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:11:58,438 INFO L124 PetriNetUnfolderBase]: 6835/11805 cut-off events. [2023-11-06 22:11:58,438 INFO L125 PetriNetUnfolderBase]: For 351027/351027 co-relation queries the response was YES. [2023-11-06 22:11:58,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 157091 conditions, 11805 events. 6835/11805 cut-off events. For 351027/351027 co-relation queries the response was YES. Maximal size of possible extension queue 842. Compared 89680 event pairs, 145 based on Foata normal form. 22/11827 useless extension candidates. Maximal degree in co-relation 156643. Up to 4526 conditions per place. [2023-11-06 22:11:58,737 INFO L140 encePairwiseOnDemand]: 136/143 looper letters, 666 selfloop transitions, 2533 changer transitions 0/3199 dead transitions. [2023-11-06 22:11:58,738 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 628 places, 3199 transitions, 109069 flow [2023-11-06 22:11:58,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-11-06 22:11:58,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2023-11-06 22:11:58,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 2929 transitions. [2023-11-06 22:11:58,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4357982443088826 [2023-11-06 22:11:58,742 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 2929 transitions. [2023-11-06 22:11:58,742 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 2929 transitions. [2023-11-06 22:11:58,743 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:11:58,743 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 2929 transitions. [2023-11-06 22:11:58,747 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 62.319148936170215) internal successors, (2929), 47 states have internal predecessors, (2929), 0 states have call successors, (0), 0 states 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 22:11:58,751 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 143.0) internal successors, (6864), 48 states have internal predecessors, (6864), 0 states have call successors, (0), 0 states 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 22:11:58,752 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 143.0) internal successors, (6864), 48 states have internal predecessors, (6864), 0 states have call successors, (0), 0 states 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 22:11:58,752 INFO L175 Difference]: Start difference. First operand has 582 places, 2945 transitions, 97155 flow. Second operand 47 states and 2929 transitions. [2023-11-06 22:11:58,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 628 places, 3199 transitions, 109069 flow [2023-11-06 22:12:08,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 607 places, 3199 transitions, 107187 flow, removed 540 selfloop flow, removed 21 redundant places. [2023-11-06 22:12:08,918 INFO L231 Difference]: Finished difference. Result has 615 places, 3078 transitions, 106483 flow [2023-11-06 22:12:08,921 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=143, PETRI_DIFFERENCE_MINUEND_FLOW=95504, PETRI_DIFFERENCE_MINUEND_PLACES=561, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2945, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2404, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=513, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=106483, PETRI_PLACES=615, PETRI_TRANSITIONS=3078} [2023-11-06 22:12:08,921 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 595 predicate places. [2023-11-06 22:12:08,921 INFO L495 AbstractCegarLoop]: Abstraction has has 615 places, 3078 transitions, 106483 flow [2023-11-06 22:12:08,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 59.888888888888886) internal successors, (1617), 27 states have internal predecessors, (1617), 0 states have call successors, (0), 0 states 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 22:12:08,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:12:08,922 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:12:08,927 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-11-06 22:12:09,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-06 22:12:09,125 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:12:09,125 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:12:09,125 INFO L85 PathProgramCache]: Analyzing trace with hash -328637073, now seen corresponding path program 28 times [2023-11-06 22:12:09,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:12:09,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372453166] [2023-11-06 22:12:09,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:12:09,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:12:09,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:12:09,332 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:12:09,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:12:09,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372453166] [2023-11-06 22:12:09,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372453166] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:12:09,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117683559] [2023-11-06 22:12:09,333 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:12:09,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:12:09,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:12:09,335 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:12:09,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-11-06 22:12:09,423 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:12:09,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:12:09,424 INFO L262 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-06 22:12:09,426 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:12:09,710 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:12:09,710 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:12:09,864 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:12:09,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117683559] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:12:09,864 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:12:09,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2023-11-06 22:12:09,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901427457] [2023-11-06 22:12:09,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:12:09,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-06 22:12:09,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:12:09,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-06 22:12:09,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=459, Unknown=0, NotChecked=0, Total=600 [2023-11-06 22:12:10,003 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 143 [2023-11-06 22:12:10,005 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 615 places, 3078 transitions, 106483 flow. Second operand has 25 states, 25 states have (on average 59.6) internal successors, (1490), 25 states have internal predecessors, (1490), 0 states have call successors, (0), 0 states 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 22:12:10,005 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:12:10,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 143 [2023-11-06 22:12:10,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:12:30,478 INFO L124 PetriNetUnfolderBase]: 7486/12774 cut-off events. [2023-11-06 22:12:30,479 INFO L125 PetriNetUnfolderBase]: For 402186/402186 co-relation queries the response was YES. [2023-11-06 22:12:30,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 178456 conditions, 12774 events. 7486/12774 cut-off events. For 402186/402186 co-relation queries the response was YES. Maximal size of possible extension queue 906. Compared 96771 event pairs, 253 based on Foata normal form. 52/12826 useless extension candidates. Maximal degree in co-relation 177641. Up to 6450 conditions per place. [2023-11-06 22:12:30,852 INFO L140 encePairwiseOnDemand]: 135/143 looper letters, 1306 selfloop transitions, 2256 changer transitions 4/3566 dead transitions. [2023-11-06 22:12:30,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 681 places, 3566 transitions, 127535 flow [2023-11-06 22:12:30,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2023-11-06 22:12:30,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2023-11-06 22:12:30,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 4141 transitions. [2023-11-06 22:12:30,859 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4322095814633128 [2023-11-06 22:12:30,859 INFO L72 ComplementDD]: Start complementDD. Operand 67 states and 4141 transitions. [2023-11-06 22:12:30,859 INFO L73 IsDeterministic]: Start isDeterministic. Operand 67 states and 4141 transitions. [2023-11-06 22:12:30,860 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:12:30,861 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 67 states and 4141 transitions. [2023-11-06 22:12:30,867 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 68 states, 67 states have (on average 61.80597014925373) internal successors, (4141), 67 states have internal predecessors, (4141), 0 states have call successors, (0), 0 states 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 22:12:30,874 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 68 states, 68 states have (on average 143.0) internal successors, (9724), 68 states have internal predecessors, (9724), 0 states have call successors, (0), 0 states 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 22:12:30,876 INFO L81 ComplementDD]: Finished complementDD. Result has 68 states, 68 states have (on average 143.0) internal successors, (9724), 68 states have internal predecessors, (9724), 0 states have call successors, (0), 0 states 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 22:12:30,877 INFO L175 Difference]: Start difference. First operand has 615 places, 3078 transitions, 106483 flow. Second operand 67 states and 4141 transitions. [2023-11-06 22:12:30,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 681 places, 3566 transitions, 127535 flow [2023-11-06 22:12:43,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 664 places, 3566 transitions, 126803 flow, removed 236 selfloop flow, removed 17 redundant places. [2023-11-06 22:12:43,769 INFO L231 Difference]: Finished difference. Result has 680 places, 3410 transitions, 123643 flow [2023-11-06 22:12:43,771 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=143, PETRI_DIFFERENCE_MINUEND_FLOW=105575, PETRI_DIFFERENCE_MINUEND_PLACES=598, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3072, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1943, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1046, PETRI_DIFFERENCE_SUBTRAHEND_STATES=67, PETRI_FLOW=123643, PETRI_PLACES=680, PETRI_TRANSITIONS=3410} [2023-11-06 22:12:43,772 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 660 predicate places. [2023-11-06 22:12:43,772 INFO L495 AbstractCegarLoop]: Abstraction has has 680 places, 3410 transitions, 123643 flow [2023-11-06 22:12:43,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 59.6) internal successors, (1490), 25 states have internal predecessors, (1490), 0 states have call successors, (0), 0 states 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 22:12:43,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:12:43,773 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:12:43,778 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-11-06 22:12:43,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:12:43,973 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:12:43,973 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:12:43,974 INFO L85 PathProgramCache]: Analyzing trace with hash 529642811, now seen corresponding path program 29 times [2023-11-06 22:12:43,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:12:43,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521408434] [2023-11-06 22:12:43,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:12:43,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:12:43,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:12:44,198 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:12:44,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:12:44,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521408434] [2023-11-06 22:12:44,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521408434] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:12:44,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770070935] [2023-11-06 22:12:44,199 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:12:44,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:12:44,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:12:44,211 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:12:44,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-11-06 22:12:44,322 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-06 22:12:44,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:12:44,324 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-06 22:12:44,325 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:12:44,673 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:12:44,673 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:12:44,868 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:12:44,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770070935] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:12:44,869 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:12:44,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2023-11-06 22:12:44,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713147344] [2023-11-06 22:12:44,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:12:44,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-06 22:12:44,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:12:44,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-06 22:12:44,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=463, Unknown=0, NotChecked=0, Total=600 [2023-11-06 22:12:45,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 143 [2023-11-06 22:12:45,169 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 680 places, 3410 transitions, 123643 flow. Second operand has 25 states, 25 states have (on average 59.6) internal successors, (1490), 25 states have internal predecessors, (1490), 0 states have call successors, (0), 0 states 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 22:12:45,169 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:12:45,169 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 143 [2023-11-06 22:12:45,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:13:06,438 INFO L124 PetriNetUnfolderBase]: 7580/13068 cut-off events. [2023-11-06 22:13:06,438 INFO L125 PetriNetUnfolderBase]: For 457606/457606 co-relation queries the response was YES. [2023-11-06 22:13:06,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 185964 conditions, 13068 events. 7580/13068 cut-off events. For 457606/457606 co-relation queries the response was YES. Maximal size of possible extension queue 940. Compared 100937 event pairs, 91 based on Foata normal form. 102/13170 useless extension candidates. Maximal degree in co-relation 185763. Up to 4571 conditions per place. [2023-11-06 22:13:06,798 INFO L140 encePairwiseOnDemand]: 135/143 looper letters, 954 selfloop transitions, 2634 changer transitions 4/3592 dead transitions. [2023-11-06 22:13:06,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 740 places, 3592 transitions, 132988 flow [2023-11-06 22:13:06,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2023-11-06 22:13:06,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2023-11-06 22:13:06,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 4218 transitions. [2023-11-06 22:13:06,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43377211024269846 [2023-11-06 22:13:06,805 INFO L72 ComplementDD]: Start complementDD. Operand 68 states and 4218 transitions. [2023-11-06 22:13:06,805 INFO L73 IsDeterministic]: Start isDeterministic. Operand 68 states and 4218 transitions. [2023-11-06 22:13:06,806 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:13:06,806 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 68 states and 4218 transitions. [2023-11-06 22:13:06,811 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 69 states, 68 states have (on average 62.029411764705884) internal successors, (4218), 68 states have internal predecessors, (4218), 0 states have call successors, (0), 0 states 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 22:13:06,816 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 69 states, 69 states have (on average 143.0) internal successors, (9867), 69 states have internal predecessors, (9867), 0 states have call successors, (0), 0 states 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 22:13:06,817 INFO L81 ComplementDD]: Finished complementDD. Result has 69 states, 69 states have (on average 143.0) internal successors, (9867), 69 states have internal predecessors, (9867), 0 states have call successors, (0), 0 states 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 22:13:06,818 INFO L175 Difference]: Start difference. First operand has 680 places, 3410 transitions, 123643 flow. Second operand 68 states and 4218 transitions. [2023-11-06 22:13:06,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 740 places, 3592 transitions, 132988 flow [2023-11-06 22:13:19,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 708 places, 3592 transitions, 129636 flow, removed 668 selfloop flow, removed 32 redundant places. [2023-11-06 22:13:19,531 INFO L231 Difference]: Finished difference. Result has 712 places, 3432 transitions, 126971 flow [2023-11-06 22:13:19,535 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=143, PETRI_DIFFERENCE_MINUEND_FLOW=118979, PETRI_DIFFERENCE_MINUEND_PLACES=641, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2577, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=748, PETRI_DIFFERENCE_SUBTRAHEND_STATES=68, PETRI_FLOW=126971, PETRI_PLACES=712, PETRI_TRANSITIONS=3432} [2023-11-06 22:13:19,535 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 692 predicate places. [2023-11-06 22:13:19,535 INFO L495 AbstractCegarLoop]: Abstraction has has 712 places, 3432 transitions, 126971 flow [2023-11-06 22:13:19,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 59.6) internal successors, (1490), 25 states have internal predecessors, (1490), 0 states have call successors, (0), 0 states 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 22:13:19,536 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:13:19,536 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:13:19,546 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c8b3e26-87d8-4db5-8bf1-9b584d77bb95/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0