./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/chl-name-comparator-trans.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_e515ae38-813c-4b59-92c7-980a68eff33a/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e515ae38-813c-4b59-92c7-980a68eff33a/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_e515ae38-813c-4b59-92c7-980a68eff33a/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e515ae38-813c-4b59-92c7-980a68eff33a/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/chl-name-comparator-trans.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e515ae38-813c-4b59-92c7-980a68eff33a/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_e515ae38-813c-4b59-92c7-980a68eff33a/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 7a18ee378e36a8b6ec16846ba26aa7ebab799f55311c04bb5b266d3aa0d0986d --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 21:53:45,825 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 21:53:45,918 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e515ae38-813c-4b59-92c7-980a68eff33a/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 21:53:45,924 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 21:53:45,925 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 21:53:45,948 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 21:53:45,949 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 21:53:45,950 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 21:53:45,950 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 21:53:45,951 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 21:53:45,952 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 21:53:45,952 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 21:53:45,953 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 21:53:45,954 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 21:53:45,954 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 21:53:45,955 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 21:53:45,955 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 21:53:45,956 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 21:53:45,956 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 21:53:45,957 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 21:53:45,957 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 21:53:45,960 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 21:53:45,961 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 21:53:45,961 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 21:53:45,961 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 21:53:45,962 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 21:53:45,962 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 21:53:45,962 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 21:53:45,963 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 21:53:45,963 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 21:53:45,964 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 21:53:45,964 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 21:53:45,964 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 21:53:45,965 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 21:53:45,965 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 21:53:45,965 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 21:53:45,966 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 21:53:45,966 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 21:53:45,966 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 21:53:45,967 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_e515ae38-813c-4b59-92c7-980a68eff33a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e515ae38-813c-4b59-92c7-980a68eff33a/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7a18ee378e36a8b6ec16846ba26aa7ebab799f55311c04bb5b266d3aa0d0986d [2023-11-06 21:53:46,256 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 21:53:46,289 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 21:53:46,292 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 21:53:46,294 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 21:53:46,295 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 21:53:46,296 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e515ae38-813c-4b59-92c7-980a68eff33a/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/weaver/chl-name-comparator-trans.wvr.c [2023-11-06 21:53:49,332 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 21:53:49,640 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 21:53:49,651 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e515ae38-813c-4b59-92c7-980a68eff33a/sv-benchmarks/c/weaver/chl-name-comparator-trans.wvr.c [2023-11-06 21:53:49,667 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e515ae38-813c-4b59-92c7-980a68eff33a/bin/uautomizer-verify-WvqO1wxjHP/data/237da0147/07f42284780040268ca32a6b1dd722f8/FLAG1c938be8a [2023-11-06 21:53:49,685 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e515ae38-813c-4b59-92c7-980a68eff33a/bin/uautomizer-verify-WvqO1wxjHP/data/237da0147/07f42284780040268ca32a6b1dd722f8 [2023-11-06 21:53:49,692 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 21:53:49,694 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 21:53:49,697 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 21:53:49,697 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 21:53:49,702 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 21:53:49,706 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:53:49" (1/1) ... [2023-11-06 21:53:49,707 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@465ea8e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:49, skipping insertion in model container [2023-11-06 21:53:49,707 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:53:49" (1/1) ... [2023-11-06 21:53:49,756 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 21:53:50,080 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_e515ae38-813c-4b59-92c7-980a68eff33a/sv-benchmarks/c/weaver/chl-name-comparator-trans.wvr.c[4788,4801] [2023-11-06 21:53:50,090 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 21:53:50,101 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 21:53:50,153 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_e515ae38-813c-4b59-92c7-980a68eff33a/sv-benchmarks/c/weaver/chl-name-comparator-trans.wvr.c[4788,4801] [2023-11-06 21:53:50,167 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 21:53:50,188 INFO L206 MainTranslator]: Completed translation [2023-11-06 21:53:50,189 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:50 WrapperNode [2023-11-06 21:53:50,189 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 21:53:50,190 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 21:53:50,190 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 21:53:50,190 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 21:53:50,199 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:50" (1/1) ... [2023-11-06 21:53:50,223 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:50" (1/1) ... [2023-11-06 21:53:50,273 INFO L138 Inliner]: procedures = 26, calls = 44, calls flagged for inlining = 17, calls inlined = 21, statements flattened = 316 [2023-11-06 21:53:50,275 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 21:53:50,276 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 21:53:50,277 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 21:53:50,277 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 21:53:50,287 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:50" (1/1) ... [2023-11-06 21:53:50,288 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:50" (1/1) ... [2023-11-06 21:53:50,310 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:50" (1/1) ... [2023-11-06 21:53:50,313 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:50" (1/1) ... [2023-11-06 21:53:50,324 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:50" (1/1) ... [2023-11-06 21:53:50,342 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:50" (1/1) ... [2023-11-06 21:53:50,350 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:50" (1/1) ... [2023-11-06 21:53:50,353 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:50" (1/1) ... [2023-11-06 21:53:50,357 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 21:53:50,358 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 21:53:50,358 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 21:53:50,358 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 21:53:50,359 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:50" (1/1) ... [2023-11-06 21:53:50,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 21:53:50,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e515ae38-813c-4b59-92c7-980a68eff33a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:53:50,400 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e515ae38-813c-4b59-92c7-980a68eff33a/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 21:53:50,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e515ae38-813c-4b59-92c7-980a68eff33a/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 21:53:50,444 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 21:53:50,445 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 21:53:50,445 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 21:53:50,445 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 21:53:50,445 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-06 21:53:50,446 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-06 21:53:50,447 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-06 21:53:50,447 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-06 21:53:50,447 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-06 21:53:50,447 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-06 21:53:50,448 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 21:53:50,448 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-06 21:53:50,448 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 21:53:50,450 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 21:53:50,450 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 21:53:50,453 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-06 21:53:50,635 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 21:53:50,638 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 21:53:51,125 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 21:53:51,141 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 21:53:51,142 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-06 21:53:51,145 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:53:51 BoogieIcfgContainer [2023-11-06 21:53:51,145 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 21:53:51,148 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 21:53:51,149 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 21:53:51,152 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 21:53:51,152 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 09:53:49" (1/3) ... [2023-11-06 21:53:51,153 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f3f936e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:53:51, skipping insertion in model container [2023-11-06 21:53:51,153 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:50" (2/3) ... [2023-11-06 21:53:51,154 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f3f936e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:53:51, skipping insertion in model container [2023-11-06 21:53:51,154 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:53:51" (3/3) ... [2023-11-06 21:53:51,155 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-name-comparator-trans.wvr.c [2023-11-06 21:53:51,173 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-06 21:53:51,186 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 21:53:51,186 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 21:53:51,186 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 21:53:51,343 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-06 21:53:51,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 375 places, 391 transitions, 803 flow [2023-11-06 21:53:51,714 INFO L124 PetriNetUnfolderBase]: 26/388 cut-off events. [2023-11-06 21:53:51,715 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-06 21:53:51,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 401 conditions, 388 events. 26/388 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 910 event pairs, 0 based on Foata normal form. 0/361 useless extension candidates. Maximal degree in co-relation 289. Up to 2 conditions per place. [2023-11-06 21:53:51,728 INFO L82 GeneralOperation]: Start removeDead. Operand has 375 places, 391 transitions, 803 flow [2023-11-06 21:53:51,749 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 361 places, 377 transitions, 772 flow [2023-11-06 21:53:51,753 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 21:53:51,763 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 361 places, 377 transitions, 772 flow [2023-11-06 21:53:51,766 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 361 places, 377 transitions, 772 flow [2023-11-06 21:53:51,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 361 places, 377 transitions, 772 flow [2023-11-06 21:53:51,858 INFO L124 PetriNetUnfolderBase]: 26/377 cut-off events. [2023-11-06 21:53:51,858 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-06 21:53:51,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 390 conditions, 377 events. 26/377 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 907 event pairs, 0 based on Foata normal form. 0/351 useless extension candidates. Maximal degree in co-relation 289. Up to 2 conditions per place. [2023-11-06 21:53:51,886 INFO L119 LiptonReduction]: Number of co-enabled transitions 35358 [2023-11-06 21:54:06,637 INFO L134 LiptonReduction]: Checked pairs total: 31745 [2023-11-06 21:54:06,638 INFO L136 LiptonReduction]: Total number of compositions: 442 [2023-11-06 21:54:06,672 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 21:54:06,681 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;@278d9d77, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 21:54:06,681 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-06 21:54:06,696 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 21:54:06,697 INFO L124 PetriNetUnfolderBase]: 4/23 cut-off events. [2023-11-06 21:54:06,697 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-06 21:54:06,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:54:06,698 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:54:06,699 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 21:54:06,708 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:54:06,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1779724847, now seen corresponding path program 1 times [2023-11-06 21:54:06,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:54:06,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715630428] [2023-11-06 21:54:06,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:06,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:54:06,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:07,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:54:07,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:54:07,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715630428] [2023-11-06 21:54:07,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715630428] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:54:07,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:54:07,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 21:54:07,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956017501] [2023-11-06 21:54:07,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:54:07,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:54:07,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:54:07,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:54:07,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:54:07,432 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 359 out of 833 [2023-11-06 21:54:07,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 24 transitions, 66 flow. Second operand has 3 states, 3 states have (on average 365.6666666666667) internal successors, (1097), 3 states have internal predecessors, (1097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:07,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:54:07,442 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 359 of 833 [2023-11-06 21:54:07,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:54:07,608 INFO L124 PetriNetUnfolderBase]: 221/328 cut-off events. [2023-11-06 21:54:07,608 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-11-06 21:54:07,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 700 conditions, 328 events. 221/328 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 773 event pairs, 138 based on Foata normal form. 0/245 useless extension candidates. Maximal degree in co-relation 534. Up to 328 conditions per place. [2023-11-06 21:54:07,613 INFO L140 encePairwiseOnDemand]: 830/833 looper letters, 23 selfloop transitions, 2 changer transitions 0/25 dead transitions. [2023-11-06 21:54:07,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 25 transitions, 118 flow [2023-11-06 21:54:07,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:54:07,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 21:54:07,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1103 transitions. [2023-11-06 21:54:07,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4413765506202481 [2023-11-06 21:54:07,647 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1103 transitions. [2023-11-06 21:54:07,647 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1103 transitions. [2023-11-06 21:54:07,653 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:54:07,656 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1103 transitions. [2023-11-06 21:54:07,664 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 367.6666666666667) internal successors, (1103), 3 states have internal predecessors, (1103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:07,677 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 833.0) internal successors, (3332), 4 states have internal predecessors, (3332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:07,680 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 833.0) internal successors, (3332), 4 states have internal predecessors, (3332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:07,682 INFO L175 Difference]: Start difference. First operand has 30 places, 24 transitions, 66 flow. Second operand 3 states and 1103 transitions. [2023-11-06 21:54:07,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 25 transitions, 118 flow [2023-11-06 21:54:07,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 25 transitions, 106 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-06 21:54:07,691 INFO L231 Difference]: Finished difference. Result has 27 places, 25 transitions, 66 flow [2023-11-06 21:54:07,693 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=833, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=66, PETRI_PLACES=27, PETRI_TRANSITIONS=25} [2023-11-06 21:54:07,699 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, -3 predicate places. [2023-11-06 21:54:07,699 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 25 transitions, 66 flow [2023-11-06 21:54:07,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 365.6666666666667) internal successors, (1097), 3 states have internal predecessors, (1097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:07,701 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:54:07,701 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:54:07,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 21:54:07,702 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 21:54:07,703 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:54:07,703 INFO L85 PathProgramCache]: Analyzing trace with hash 1595148529, now seen corresponding path program 1 times [2023-11-06 21:54:07,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:54:07,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555812079] [2023-11-06 21:54:07,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:07,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:54:07,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:07,915 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:54:07,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:54:07,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555812079] [2023-11-06 21:54:07,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555812079] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:54:07,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640847207] [2023-11-06 21:54:07,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:07,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:07,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e515ae38-813c-4b59-92c7-980a68eff33a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:54:07,924 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e515ae38-813c-4b59-92c7-980a68eff33a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:54:07,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e515ae38-813c-4b59-92c7-980a68eff33a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 21:54:08,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:08,097 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-06 21:54:08,103 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:54:08,190 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:54:08,190 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:54:08,210 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:54:08,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640847207] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:54:08,211 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:54:08,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-06 21:54:08,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873120571] [2023-11-06 21:54:08,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:54:08,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 21:54:08,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:54:08,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 21:54:08,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-06 21:54:08,289 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 357 out of 833 [2023-11-06 21:54:08,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 25 transitions, 66 flow. Second operand has 7 states, 7 states have (on average 360.85714285714283) internal successors, (2526), 7 states have internal predecessors, (2526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:08,294 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:54:08,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 357 of 833 [2023-11-06 21:54:08,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:54:08,447 INFO L124 PetriNetUnfolderBase]: 221/330 cut-off events. [2023-11-06 21:54:08,448 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-06 21:54:08,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 684 conditions, 330 events. 221/330 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 773 event pairs, 138 based on Foata normal form. 0/247 useless extension candidates. Maximal degree in co-relation 673. Up to 328 conditions per place. [2023-11-06 21:54:08,453 INFO L140 encePairwiseOnDemand]: 830/833 looper letters, 23 selfloop transitions, 4 changer transitions 0/27 dead transitions. [2023-11-06 21:54:08,454 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 27 transitions, 128 flow [2023-11-06 21:54:08,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 21:54:08,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 21:54:08,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1814 transitions. [2023-11-06 21:54:08,462 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4355342136854742 [2023-11-06 21:54:08,463 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1814 transitions. [2023-11-06 21:54:08,463 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1814 transitions. [2023-11-06 21:54:08,469 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:54:08,470 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1814 transitions. [2023-11-06 21:54:08,497 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 362.8) internal successors, (1814), 5 states have internal predecessors, (1814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:08,508 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 833.0) internal successors, (4998), 6 states have internal predecessors, (4998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:08,512 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 833.0) internal successors, (4998), 6 states have internal predecessors, (4998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:08,512 INFO L175 Difference]: Start difference. First operand has 27 places, 25 transitions, 66 flow. Second operand 5 states and 1814 transitions. [2023-11-06 21:54:08,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 27 transitions, 128 flow [2023-11-06 21:54:08,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 27 transitions, 124 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-06 21:54:08,514 INFO L231 Difference]: Finished difference. Result has 32 places, 27 transitions, 88 flow [2023-11-06 21:54:08,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=833, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=88, PETRI_PLACES=32, PETRI_TRANSITIONS=27} [2023-11-06 21:54:08,515 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 2 predicate places. [2023-11-06 21:54:08,516 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 27 transitions, 88 flow [2023-11-06 21:54:08,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 360.85714285714283) internal successors, (2526), 7 states have internal predecessors, (2526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:08,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:54:08,518 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:54:08,536 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e515ae38-813c-4b59-92c7-980a68eff33a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 21:54:08,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e515ae38-813c-4b59-92c7-980a68eff33a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:08,729 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 21:54:08,729 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:54:08,729 INFO L85 PathProgramCache]: Analyzing trace with hash -1916653967, now seen corresponding path program 2 times [2023-11-06 21:54:08,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:54:08,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306441796] [2023-11-06 21:54:08,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:08,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:54:08,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:09,192 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 21:54:09,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:54:09,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306441796] [2023-11-06 21:54:09,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306441796] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:54:09,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:54:09,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 21:54:09,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838978757] [2023-11-06 21:54:09,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:54:09,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 21:54:09,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:54:09,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 21:54:09,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:54:09,303 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 348 out of 833 [2023-11-06 21:54:09,306 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 27 transitions, 88 flow. Second operand has 4 states, 4 states have (on average 353.25) internal successors, (1413), 4 states have internal predecessors, (1413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:09,306 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:54:09,306 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 348 of 833 [2023-11-06 21:54:09,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:54:09,558 INFO L124 PetriNetUnfolderBase]: 365/541 cut-off events. [2023-11-06 21:54:09,558 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2023-11-06 21:54:09,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1121 conditions, 541 events. 365/541 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1618 event pairs, 138 based on Foata normal form. 1/396 useless extension candidates. Maximal degree in co-relation 1094. Up to 331 conditions per place. [2023-11-06 21:54:09,563 INFO L140 encePairwiseOnDemand]: 829/833 looper letters, 37 selfloop transitions, 2 changer transitions 15/54 dead transitions. [2023-11-06 21:54:09,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 54 transitions, 256 flow [2023-11-06 21:54:09,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 21:54:09,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 21:54:09,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1444 transitions. [2023-11-06 21:54:09,569 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43337334933973587 [2023-11-06 21:54:09,569 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1444 transitions. [2023-11-06 21:54:09,569 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1444 transitions. [2023-11-06 21:54:09,571 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:54:09,571 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1444 transitions. [2023-11-06 21:54:09,576 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 361.0) internal successors, (1444), 4 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:09,584 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 833.0) internal successors, (4165), 5 states have internal predecessors, (4165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:09,588 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 833.0) internal successors, (4165), 5 states have internal predecessors, (4165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:09,588 INFO L175 Difference]: Start difference. First operand has 32 places, 27 transitions, 88 flow. Second operand 4 states and 1444 transitions. [2023-11-06 21:54:09,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 54 transitions, 256 flow [2023-11-06 21:54:09,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 54 transitions, 246 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-11-06 21:54:09,593 INFO L231 Difference]: Finished difference. Result has 36 places, 28 transitions, 92 flow [2023-11-06 21:54:09,593 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=833, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=92, PETRI_PLACES=36, PETRI_TRANSITIONS=28} [2023-11-06 21:54:09,594 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 6 predicate places. [2023-11-06 21:54:09,596 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 28 transitions, 92 flow [2023-11-06 21:54:09,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 353.25) internal successors, (1413), 4 states have internal predecessors, (1413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:09,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:54:09,598 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:54:09,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 21:54:09,599 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 21:54:09,599 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:54:09,599 INFO L85 PathProgramCache]: Analyzing trace with hash -679366668, now seen corresponding path program 1 times [2023-11-06 21:54:09,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:54:09,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565941784] [2023-11-06 21:54:09,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:09,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:54:09,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:10,039 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-06 21:54:10,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:54:10,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565941784] [2023-11-06 21:54:10,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565941784] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:54:10,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:54:10,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 21:54:10,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920932431] [2023-11-06 21:54:10,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:54:10,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 21:54:10,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:54:10,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 21:54:10,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:54:10,169 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 348 out of 833 [2023-11-06 21:54:10,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 28 transitions, 92 flow. Second operand has 4 states, 4 states have (on average 353.5) internal successors, (1414), 4 states have internal predecessors, (1414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:10,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:54:10,172 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 348 of 833 [2023-11-06 21:54:10,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:54:10,431 INFO L124 PetriNetUnfolderBase]: 500/738 cut-off events. [2023-11-06 21:54:10,431 INFO L125 PetriNetUnfolderBase]: For 251/251 co-relation queries the response was YES. [2023-11-06 21:54:10,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1781 conditions, 738 events. 500/738 cut-off events. For 251/251 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2395 event pairs, 191 based on Foata normal form. 1/559 useless extension candidates. Maximal degree in co-relation 1769. Up to 430 conditions per place. [2023-11-06 21:54:10,465 INFO L140 encePairwiseOnDemand]: 829/833 looper letters, 39 selfloop transitions, 2 changer transitions 18/59 dead transitions. [2023-11-06 21:54:10,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 59 transitions, 299 flow [2023-11-06 21:54:10,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 21:54:10,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 21:54:10,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1446 transitions. [2023-11-06 21:54:10,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4339735894357743 [2023-11-06 21:54:10,474 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1446 transitions. [2023-11-06 21:54:10,474 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1446 transitions. [2023-11-06 21:54:10,475 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:54:10,475 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1446 transitions. [2023-11-06 21:54:10,481 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 361.5) internal successors, (1446), 4 states have internal predecessors, (1446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:10,489 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 833.0) internal successors, (4165), 5 states have internal predecessors, (4165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:10,493 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 833.0) internal successors, (4165), 5 states have internal predecessors, (4165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:10,494 INFO L175 Difference]: Start difference. First operand has 36 places, 28 transitions, 92 flow. Second operand 4 states and 1446 transitions. [2023-11-06 21:54:10,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 59 transitions, 299 flow [2023-11-06 21:54:10,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 59 transitions, 285 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-11-06 21:54:10,499 INFO L231 Difference]: Finished difference. Result has 38 places, 29 transitions, 100 flow [2023-11-06 21:54:10,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=833, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=100, PETRI_PLACES=38, PETRI_TRANSITIONS=29} [2023-11-06 21:54:10,503 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 8 predicate places. [2023-11-06 21:54:10,503 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 29 transitions, 100 flow [2023-11-06 21:54:10,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 353.5) internal successors, (1414), 4 states have internal predecessors, (1414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:10,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:54:10,509 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:54:10,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-06 21:54:10,510 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 21:54:10,511 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:54:10,511 INFO L85 PathProgramCache]: Analyzing trace with hash 1594112954, now seen corresponding path program 1 times [2023-11-06 21:54:10,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:54:10,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49064669] [2023-11-06 21:54:10,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:10,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:54:10,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:12,404 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 21:54:12,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:54:12,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49064669] [2023-11-06 21:54:12,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49064669] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:54:12,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467962197] [2023-11-06 21:54:12,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:12,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:12,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e515ae38-813c-4b59-92c7-980a68eff33a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:54:12,419 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e515ae38-813c-4b59-92c7-980a68eff33a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:54:12,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e515ae38-813c-4b59-92c7-980a68eff33a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 21:54:12,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:12,579 INFO L262 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 38 conjunts are in the unsatisfiable core [2023-11-06 21:54:12,585 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:54:12,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:54:12,965 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 33 [2023-11-06 21:54:13,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:54:13,271 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 33 [2023-11-06 21:54:13,547 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 135 treesize of output 87 [2023-11-06 21:54:14,099 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 21:54:14,099 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:54:15,700 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 21:54:15,700 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 215 treesize of output 167 [2023-11-06 21:54:15,714 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 50 [2023-11-06 21:54:15,728 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 46 [2023-11-06 21:54:16,016 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 21:54:16,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467962197] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:54:16,016 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:54:16,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 35 [2023-11-06 21:54:16,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278988779] [2023-11-06 21:54:16,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:54:16,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-11-06 21:54:16,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:54:16,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-11-06 21:54:16,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1183, Unknown=9, NotChecked=0, Total=1332 [2023-11-06 21:54:18,430 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 263 out of 833 [2023-11-06 21:54:18,444 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 29 transitions, 100 flow. Second operand has 37 states, 37 states have (on average 264.86486486486484) internal successors, (9800), 37 states have internal predecessors, (9800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:18,445 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:54:18,445 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 263 of 833 [2023-11-06 21:54:18,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:54:25,691 INFO L124 PetriNetUnfolderBase]: 1279/1953 cut-off events. [2023-11-06 21:54:25,692 INFO L125 PetriNetUnfolderBase]: For 461/461 co-relation queries the response was YES. [2023-11-06 21:54:25,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4758 conditions, 1953 events. 1279/1953 cut-off events. For 461/461 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 8554 event pairs, 78 based on Foata normal form. 7/1434 useless extension candidates. Maximal degree in co-relation 4732. Up to 453 conditions per place. [2023-11-06 21:54:25,707 INFO L140 encePairwiseOnDemand]: 821/833 looper letters, 224 selfloop transitions, 91 changer transitions 58/373 dead transitions. [2023-11-06 21:54:25,707 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 373 transitions, 1761 flow [2023-11-06 21:54:25,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-11-06 21:54:25,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2023-11-06 21:54:25,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 11682 transitions. [2023-11-06 21:54:25,754 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3261397582288729 [2023-11-06 21:54:25,754 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 11682 transitions. [2023-11-06 21:54:25,754 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 11682 transitions. [2023-11-06 21:54:25,763 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:54:25,763 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 11682 transitions. [2023-11-06 21:54:25,794 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 271.6744186046512) internal successors, (11682), 43 states have internal predecessors, (11682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:25,937 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 833.0) internal successors, (36652), 44 states have internal predecessors, (36652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:25,958 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 833.0) internal successors, (36652), 44 states have internal predecessors, (36652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:25,958 INFO L175 Difference]: Start difference. First operand has 38 places, 29 transitions, 100 flow. Second operand 43 states and 11682 transitions. [2023-11-06 21:54:25,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 373 transitions, 1761 flow [2023-11-06 21:54:25,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 373 transitions, 1735 flow, removed 10 selfloop flow, removed 2 redundant places. [2023-11-06 21:54:25,976 INFO L231 Difference]: Finished difference. Result has 105 places, 124 transitions, 812 flow [2023-11-06 21:54:25,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=833, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=812, PETRI_PLACES=105, PETRI_TRANSITIONS=124} [2023-11-06 21:54:25,979 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 75 predicate places. [2023-11-06 21:54:25,980 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 124 transitions, 812 flow [2023-11-06 21:54:25,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 264.86486486486484) internal successors, (9800), 37 states have internal predecessors, (9800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:25,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:54:25,984 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:54:25,997 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e515ae38-813c-4b59-92c7-980a68eff33a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 21:54:26,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e515ae38-813c-4b59-92c7-980a68eff33a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:26,191 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 21:54:26,192 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:54:26,192 INFO L85 PathProgramCache]: Analyzing trace with hash -479021052, now seen corresponding path program 2 times [2023-11-06 21:54:26,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:54:26,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207533416] [2023-11-06 21:54:26,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:26,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:54:26,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:27,594 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 21:54:27,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:54:27,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207533416] [2023-11-06 21:54:27,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207533416] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:54:27,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130193345] [2023-11-06 21:54:27,595 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 21:54:27,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:27,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e515ae38-813c-4b59-92c7-980a68eff33a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:54:27,596 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e515ae38-813c-4b59-92c7-980a68eff33a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:54:27,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e515ae38-813c-4b59-92c7-980a68eff33a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 21:54:27,761 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 21:54:27,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:54:27,764 INFO L262 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-06 21:54:27,768 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:54:28,288 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 62 [2023-11-06 21:54:28,424 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 21:54:28,425 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:54:29,233 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-06 21:54:29,234 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 135 treesize of output 70 [2023-11-06 21:54:29,329 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 21:54:29,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130193345] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:54:29,330 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:54:29,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 7] total 23 [2023-11-06 21:54:29,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759876446] [2023-11-06 21:54:29,330 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:54:29,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-06 21:54:29,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:54:29,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-06 21:54:29,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2023-11-06 21:54:32,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 310 out of 833 [2023-11-06 21:54:32,315 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 124 transitions, 812 flow. Second operand has 24 states, 24 states have (on average 312.5833333333333) internal successors, (7502), 24 states have internal predecessors, (7502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:32,315 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:54:32,315 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 310 of 833 [2023-11-06 21:54:32,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:54:42,458 INFO L124 PetriNetUnfolderBase]: 4038/6368 cut-off events. [2023-11-06 21:54:42,458 INFO L125 PetriNetUnfolderBase]: For 142100/142100 co-relation queries the response was YES. [2023-11-06 21:54:42,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41421 conditions, 6368 events. 4038/6368 cut-off events. For 142100/142100 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 37251 event pairs, 390 based on Foata normal form. 11/6035 useless extension candidates. Maximal degree in co-relation 41367. Up to 1811 conditions per place. [2023-11-06 21:54:42,561 INFO L140 encePairwiseOnDemand]: 819/833 looper letters, 424 selfloop transitions, 332 changer transitions 100/856 dead transitions. [2023-11-06 21:54:42,561 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 856 transitions, 8685 flow [2023-11-06 21:54:42,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2023-11-06 21:54:42,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2023-11-06 21:54:42,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 23840 transitions. [2023-11-06 21:54:42,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38159263705482194 [2023-11-06 21:54:42,627 INFO L72 ComplementDD]: Start complementDD. Operand 75 states and 23840 transitions. [2023-11-06 21:54:42,627 INFO L73 IsDeterministic]: Start isDeterministic. Operand 75 states and 23840 transitions. [2023-11-06 21:54:42,642 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:54:42,642 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 75 states and 23840 transitions. [2023-11-06 21:54:42,695 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 76 states, 75 states have (on average 317.8666666666667) internal successors, (23840), 75 states have internal predecessors, (23840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:42,784 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 76 states, 76 states have (on average 833.0) internal successors, (63308), 76 states have internal predecessors, (63308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:42,804 INFO L81 ComplementDD]: Finished complementDD. Result has 76 states, 76 states have (on average 833.0) internal successors, (63308), 76 states have internal predecessors, (63308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:42,804 INFO L175 Difference]: Start difference. First operand has 105 places, 124 transitions, 812 flow. Second operand 75 states and 23840 transitions. [2023-11-06 21:54:42,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 856 transitions, 8685 flow [2023-11-06 21:54:43,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 856 transitions, 7614 flow, removed 490 selfloop flow, removed 9 redundant places. [2023-11-06 21:54:43,165 INFO L231 Difference]: Finished difference. Result has 215 places, 430 transitions, 4540 flow [2023-11-06 21:54:43,165 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=833, PETRI_DIFFERENCE_MINUEND_FLOW=661, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=75, PETRI_FLOW=4540, PETRI_PLACES=215, PETRI_TRANSITIONS=430} [2023-11-06 21:54:43,166 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 185 predicate places. [2023-11-06 21:54:43,166 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 430 transitions, 4540 flow [2023-11-06 21:54:43,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 312.5833333333333) internal successors, (7502), 24 states have internal predecessors, (7502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:43,169 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:54:43,169 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:54:43,179 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e515ae38-813c-4b59-92c7-980a68eff33a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 21:54:43,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e515ae38-813c-4b59-92c7-980a68eff33a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-06 21:54:43,375 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 21:54:43,376 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:54:43,376 INFO L85 PathProgramCache]: Analyzing trace with hash -2108383794, now seen corresponding path program 3 times [2023-11-06 21:54:43,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:54:43,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511115377] [2023-11-06 21:54:43,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:43,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:54:43,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:45,475 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:54:45,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:54:45,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511115377] [2023-11-06 21:54:45,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511115377] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:54:45,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092077851] [2023-11-06 21:54:45,476 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 21:54:45,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:45,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e515ae38-813c-4b59-92c7-980a68eff33a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:54:45,477 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e515ae38-813c-4b59-92c7-980a68eff33a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:54:45,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e515ae38-813c-4b59-92c7-980a68eff33a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 21:54:45,634 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 21:54:45,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:54:45,637 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 39 conjunts are in the unsatisfiable core [2023-11-06 21:54:45,642 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:54:45,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:54:45,971 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 64 [2023-11-06 21:54:46,241 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 149 treesize of output 97 [2023-11-06 21:54:47,285 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 21:54:47,286 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:54:48,741 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 21:54:48,742 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 184 treesize of output 120 [2023-11-06 21:54:48,757 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 46 [2023-11-06 21:54:48,767 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 44 [2023-11-06 21:54:49,034 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 21:54:49,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092077851] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:54:49,035 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:54:49,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 35 [2023-11-06 21:54:49,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72983786] [2023-11-06 21:54:49,035 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:54:49,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-11-06 21:54:49,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:54:49,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-11-06 21:54:49,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1210, Unknown=3, NotChecked=0, Total=1332 [2023-11-06 21:54:53,150 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 254 out of 833 [2023-11-06 21:54:53,157 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 430 transitions, 4540 flow. Second operand has 37 states, 37 states have (on average 255.9189189189189) internal successors, (9469), 37 states have internal predecessors, (9469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:53,158 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:54:53,158 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 254 of 833 [2023-11-06 21:54:53,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:55:09,178 INFO L124 PetriNetUnfolderBase]: 6656/10621 cut-off events. [2023-11-06 21:55:09,179 INFO L125 PetriNetUnfolderBase]: For 703160/703160 co-relation queries the response was YES. [2023-11-06 21:55:09,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109389 conditions, 10621 events. 6656/10621 cut-off events. For 703160/703160 co-relation queries the response was YES. Maximal size of possible extension queue 568. Compared 69001 event pairs, 636 based on Foata normal form. 37/10658 useless extension candidates. Maximal degree in co-relation 109291. Up to 3335 conditions per place. [2023-11-06 21:55:09,438 INFO L140 encePairwiseOnDemand]: 820/833 looper letters, 639 selfloop transitions, 482 changer transitions 104/1225 dead transitions. [2023-11-06 21:55:09,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 1225 transitions, 18742 flow [2023-11-06 21:55:09,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2023-11-06 21:55:09,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2023-11-06 21:55:09,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 14456 transitions. [2023-11-06 21:55:09,569 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31552984830295755 [2023-11-06 21:55:09,570 INFO L72 ComplementDD]: Start complementDD. Operand 55 states and 14456 transitions. [2023-11-06 21:55:09,570 INFO L73 IsDeterministic]: Start isDeterministic. Operand 55 states and 14456 transitions. [2023-11-06 21:55:09,576 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:55:09,576 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 55 states and 14456 transitions. [2023-11-06 21:55:09,599 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 56 states, 55 states have (on average 262.8363636363636) internal successors, (14456), 55 states have internal predecessors, (14456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:09,646 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 56 states, 56 states have (on average 833.0) internal successors, (46648), 56 states have internal predecessors, (46648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:09,654 INFO L81 ComplementDD]: Finished complementDD. Result has 56 states, 56 states have (on average 833.0) internal successors, (46648), 56 states have internal predecessors, (46648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:09,655 INFO L175 Difference]: Start difference. First operand has 215 places, 430 transitions, 4540 flow. Second operand 55 states and 14456 transitions. [2023-11-06 21:55:09,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 1225 transitions, 18742 flow [2023-11-06 21:55:13,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 1225 transitions, 14469 flow, removed 2096 selfloop flow, removed 10 redundant places. [2023-11-06 21:55:13,336 INFO L231 Difference]: Finished difference. Result has 291 places, 752 transitions, 9644 flow [2023-11-06 21:55:13,337 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=833, PETRI_DIFFERENCE_MINUEND_FLOW=3100, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=198, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=55, PETRI_FLOW=9644, PETRI_PLACES=291, PETRI_TRANSITIONS=752} [2023-11-06 21:55:13,337 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 261 predicate places. [2023-11-06 21:55:13,337 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 752 transitions, 9644 flow [2023-11-06 21:55:13,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 255.9189189189189) internal successors, (9469), 37 states have internal predecessors, (9469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:13,338 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:55:13,339 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:55:13,343 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e515ae38-813c-4b59-92c7-980a68eff33a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-06 21:55:13,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e515ae38-813c-4b59-92c7-980a68eff33a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:55:13,540 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 21:55:13,540 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:55:13,540 INFO L85 PathProgramCache]: Analyzing trace with hash -965467762, now seen corresponding path program 4 times [2023-11-06 21:55:13,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:55:13,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405330399] [2023-11-06 21:55:13,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:55:13,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:55:13,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:55:14,614 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 21:55:14,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:55:14,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405330399] [2023-11-06 21:55:14,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405330399] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:55:14,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364058352] [2023-11-06 21:55:14,615 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 21:55:14,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:55:14,615 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e515ae38-813c-4b59-92c7-980a68eff33a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:55:14,616 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e515ae38-813c-4b59-92c7-980a68eff33a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:55:14,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e515ae38-813c-4b59-92c7-980a68eff33a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 21:55:14,779 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 21:55:14,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:55:14,782 INFO L262 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-06 21:55:14,786 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:55:15,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:55:15,080 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 70 [2023-11-06 21:55:15,397 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 178 treesize of output 114 [2023-11-06 21:55:15,804 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 21:55:15,805 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:55:16,692 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 21:55:16,692 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 211 treesize of output 119 [2023-11-06 21:55:16,704 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2023-11-06 21:55:16,914 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 21:55:16,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364058352] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:55:16,915 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:55:16,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 27 [2023-11-06 21:55:16,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773963776] [2023-11-06 21:55:16,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:55:16,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-06 21:55:16,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:55:16,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-06 21:55:16,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2023-11-06 21:55:20,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 311 out of 833 [2023-11-06 21:55:20,413 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 752 transitions, 9644 flow. Second operand has 29 states, 29 states have (on average 313.37931034482756) internal successors, (9088), 29 states have internal predecessors, (9088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:20,413 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:55:20,413 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 311 of 833 [2023-11-06 21:55:20,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:55:30,077 INFO L124 PetriNetUnfolderBase]: 10217/16099 cut-off events. [2023-11-06 21:55:30,077 INFO L125 PetriNetUnfolderBase]: For 2089526/2089526 co-relation queries the response was YES. [2023-11-06 21:55:30,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 196941 conditions, 16099 events. 10217/16099 cut-off events. For 2089526/2089526 co-relation queries the response was YES. Maximal size of possible extension queue 854. Compared 109644 event pairs, 1423 based on Foata normal form. 17/16116 useless extension candidates. Maximal degree in co-relation 196810. Up to 3987 conditions per place. [2023-11-06 21:55:30,532 INFO L140 encePairwiseOnDemand]: 823/833 looper letters, 1037 selfloop transitions, 332 changer transitions 130/1499 dead transitions. [2023-11-06 21:55:30,532 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 1499 transitions, 26191 flow [2023-11-06 21:55:30,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-06 21:55:30,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-11-06 21:55:30,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 9305 transitions. [2023-11-06 21:55:30,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38518855818189346 [2023-11-06 21:55:30,553 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 9305 transitions. [2023-11-06 21:55:30,553 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 9305 transitions. [2023-11-06 21:55:30,561 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:55:30,562 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 9305 transitions. [2023-11-06 21:55:30,594 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 320.86206896551727) internal successors, (9305), 29 states have internal predecessors, (9305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:30,625 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 833.0) internal successors, (24990), 30 states have internal predecessors, (24990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:30,629 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 833.0) internal successors, (24990), 30 states have internal predecessors, (24990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:30,629 INFO L175 Difference]: Start difference. First operand has 291 places, 752 transitions, 9644 flow. Second operand 29 states and 9305 transitions. [2023-11-06 21:55:30,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 1499 transitions, 26191 flow [2023-11-06 21:55:41,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 1499 transitions, 21358 flow, removed 2415 selfloop flow, removed 10 redundant places. [2023-11-06 21:55:41,187 INFO L231 Difference]: Finished difference. Result has 314 places, 902 transitions, 9699 flow [2023-11-06 21:55:41,188 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=833, PETRI_DIFFERENCE_MINUEND_FLOW=7165, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=752, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=503, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=9699, PETRI_PLACES=314, PETRI_TRANSITIONS=902} [2023-11-06 21:55:41,189 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 284 predicate places. [2023-11-06 21:55:41,189 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 902 transitions, 9699 flow [2023-11-06 21:55:41,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 313.37931034482756) internal successors, (9088), 29 states have internal predecessors, (9088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:41,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:55:41,191 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:55:41,201 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e515ae38-813c-4b59-92c7-980a68eff33a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 21:55:41,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e515ae38-813c-4b59-92c7-980a68eff33a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-06 21:55:41,397 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 21:55:41,397 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:55:41,397 INFO L85 PathProgramCache]: Analyzing trace with hash -1014950714, now seen corresponding path program 5 times [2023-11-06 21:55:41,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:55:41,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557480997] [2023-11-06 21:55:41,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:55:41,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:55:41,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:55:43,063 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:55:43,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:55:43,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557480997] [2023-11-06 21:55:43,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557480997] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:55:43,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913571331] [2023-11-06 21:55:43,065 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 21:55:43,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:55:43,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e515ae38-813c-4b59-92c7-980a68eff33a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:55:43,066 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e515ae38-813c-4b59-92c7-980a68eff33a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:55:43,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e515ae38-813c-4b59-92c7-980a68eff33a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 21:55:43,277 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-06 21:55:43,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:55:43,280 INFO L262 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-06 21:55:43,285 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:55:43,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:55:43,620 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 33 [2023-11-06 21:55:44,229 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 72 [2023-11-06 21:55:44,394 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 21:55:44,395 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:55:45,752 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 21:55:45,753 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 139 treesize of output 99 [2023-11-06 21:55:45,763 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 53 [2023-11-06 21:55:45,773 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 47 [2023-11-06 21:55:46,134 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 21:55:46,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913571331] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:55:46,135 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:55:46,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 35 [2023-11-06 21:55:46,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600773755] [2023-11-06 21:55:46,135 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:55:46,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-11-06 21:55:46,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:55:46,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-11-06 21:55:46,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1197, Unknown=1, NotChecked=0, Total=1332 [2023-11-06 21:55:50,340 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 254 out of 833 [2023-11-06 21:55:50,347 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 902 transitions, 9699 flow. Second operand has 37 states, 37 states have (on average 255.9189189189189) internal successors, (9469), 37 states have internal predecessors, (9469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:50,348 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:55:50,348 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 254 of 833 [2023-11-06 21:55:50,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:56:05,439 INFO L124 PetriNetUnfolderBase]: 13805/22324 cut-off events. [2023-11-06 21:56:05,439 INFO L125 PetriNetUnfolderBase]: For 2241611/2241611 co-relation queries the response was YES. [2023-11-06 21:56:05,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 280108 conditions, 22324 events. 13805/22324 cut-off events. For 2241611/2241611 co-relation queries the response was YES. Maximal size of possible extension queue 1163. Compared 166063 event pairs, 1676 based on Foata normal form. 14/22310 useless extension candidates. Maximal degree in co-relation 279972. Up to 6234 conditions per place. [2023-11-06 21:56:06,159 INFO L140 encePairwiseOnDemand]: 820/833 looper letters, 710 selfloop transitions, 562 changer transitions 104/1376 dead transitions. [2023-11-06 21:56:06,159 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 1376 transitions, 20500 flow [2023-11-06 21:56:06,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-06 21:56:06,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-11-06 21:56:06,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 7593 transitions. [2023-11-06 21:56:06,178 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31431883098066815 [2023-11-06 21:56:06,178 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 7593 transitions. [2023-11-06 21:56:06,179 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 7593 transitions. [2023-11-06 21:56:06,182 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:56:06,182 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 7593 transitions. [2023-11-06 21:56:06,196 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 261.82758620689657) internal successors, (7593), 29 states have internal predecessors, (7593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:06,224 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 833.0) internal successors, (24990), 30 states have internal predecessors, (24990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:06,229 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 833.0) internal successors, (24990), 30 states have internal predecessors, (24990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:06,229 INFO L175 Difference]: Start difference. First operand has 314 places, 902 transitions, 9699 flow. Second operand 29 states and 7593 transitions. [2023-11-06 21:56:06,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 1376 transitions, 20500 flow [2023-11-06 21:56:18,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 1376 transitions, 20203 flow, removed 147 selfloop flow, removed 6 redundant places. [2023-11-06 21:56:18,090 INFO L231 Difference]: Finished difference. Result has 347 places, 1092 transitions, 14133 flow [2023-11-06 21:56:18,091 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=833, PETRI_DIFFERENCE_MINUEND_FLOW=9602, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=902, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=379, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=465, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=14133, PETRI_PLACES=347, PETRI_TRANSITIONS=1092} [2023-11-06 21:56:18,091 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 317 predicate places. [2023-11-06 21:56:18,091 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 1092 transitions, 14133 flow [2023-11-06 21:56:18,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 255.9189189189189) internal successors, (9469), 37 states have internal predecessors, (9469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:18,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:56:18,093 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:56:18,100 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e515ae38-813c-4b59-92c7-980a68eff33a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 21:56:18,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e515ae38-813c-4b59-92c7-980a68eff33a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:56:18,293 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 21:56:18,294 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:56:18,294 INFO L85 PathProgramCache]: Analyzing trace with hash 2034899752, now seen corresponding path program 6 times [2023-11-06 21:56:18,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:56:18,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880666343] [2023-11-06 21:56:18,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:56:18,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:56:18,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:56:19,416 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 21:56:19,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:56:19,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880666343] [2023-11-06 21:56:19,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880666343] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:56:19,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387161936] [2023-11-06 21:56:19,417 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 21:56:19,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:56:19,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e515ae38-813c-4b59-92c7-980a68eff33a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:56:19,418 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e515ae38-813c-4b59-92c7-980a68eff33a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:56:19,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e515ae38-813c-4b59-92c7-980a68eff33a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 21:56:19,602 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-06 21:56:19,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:56:19,605 INFO L262 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-06 21:56:19,609 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:56:20,078 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 193 treesize of output 125 [2023-11-06 21:56:20,900 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 21:56:20,900 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:56:21,746 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 21:56:21,746 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 193 treesize of output 105 [2023-11-06 21:56:21,985 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 21:56:21,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387161936] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:56:21,986 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:56:21,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 7] total 23 [2023-11-06 21:56:21,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727842748] [2023-11-06 21:56:21,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:56:21,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-06 21:56:21,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:56:21,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-06 21:56:21,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2023-11-06 21:56:24,583 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 310 out of 833 [2023-11-06 21:56:24,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 1092 transitions, 14133 flow. Second operand has 24 states, 24 states have (on average 312.625) internal successors, (7503), 24 states have internal predecessors, (7503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:24,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:56:24,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 310 of 833 [2023-11-06 21:56:24,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:56:43,453 INFO L124 PetriNetUnfolderBase]: 16227/26246 cut-off events. [2023-11-06 21:56:43,453 INFO L125 PetriNetUnfolderBase]: For 3625538/3625538 co-relation queries the response was YES. [2023-11-06 21:56:44,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 362136 conditions, 26246 events. 16227/26246 cut-off events. For 3625538/3625538 co-relation queries the response was YES. Maximal size of possible extension queue 1385. Compared 199786 event pairs, 3169 based on Foata normal form. 26/26272 useless extension candidates. Maximal degree in co-relation 361986. Up to 8725 conditions per place. [2023-11-06 21:56:44,234 INFO L140 encePairwiseOnDemand]: 819/833 looper letters, 854 selfloop transitions, 804 changer transitions 140/1798 dead transitions. [2023-11-06 21:56:44,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 1798 transitions, 32617 flow [2023-11-06 21:56:44,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-11-06 21:56:44,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2023-11-06 21:56:44,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 13387 transitions. [2023-11-06 21:56:44,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38263876979363176 [2023-11-06 21:56:44,252 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 13387 transitions. [2023-11-06 21:56:44,252 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 13387 transitions. [2023-11-06 21:56:44,257 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:56:44,257 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 13387 transitions. [2023-11-06 21:56:44,274 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 318.73809523809524) internal successors, (13387), 42 states have internal predecessors, (13387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:44,313 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 833.0) internal successors, (35819), 43 states have internal predecessors, (35819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:44,319 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 833.0) internal successors, (35819), 43 states have internal predecessors, (35819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:44,319 INFO L175 Difference]: Start difference. First operand has 347 places, 1092 transitions, 14133 flow. Second operand 42 states and 13387 transitions. [2023-11-06 21:56:44,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 1798 transitions, 32617 flow [2023-11-06 21:57:14,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 1798 transitions, 31244 flow, removed 615 selfloop flow, removed 14 redundant places. [2023-11-06 21:57:14,518 INFO L231 Difference]: Finished difference. Result has 395 places, 1338 transitions, 20094 flow [2023-11-06 21:57:14,519 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=833, PETRI_DIFFERENCE_MINUEND_FLOW=13293, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1092, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=562, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=464, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=20094, PETRI_PLACES=395, PETRI_TRANSITIONS=1338} [2023-11-06 21:57:14,519 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 365 predicate places. [2023-11-06 21:57:14,520 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 1338 transitions, 20094 flow [2023-11-06 21:57:14,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 312.625) internal successors, (7503), 24 states have internal predecessors, (7503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:57:14,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:57:14,521 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:57:14,526 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e515ae38-813c-4b59-92c7-980a68eff33a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 21:57:14,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e515ae38-813c-4b59-92c7-980a68eff33a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-06 21:57:14,724 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 21:57:14,725 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:57:14,725 INFO L85 PathProgramCache]: Analyzing trace with hash -565794782, now seen corresponding path program 7 times [2023-11-06 21:57:14,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:57:14,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765583526] [2023-11-06 21:57:14,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:57:14,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:57:14,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:57:15,774 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 21:57:15,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:57:15,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765583526] [2023-11-06 21:57:15,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765583526] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:57:15,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120114877] [2023-11-06 21:57:15,775 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 21:57:15,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:57:15,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e515ae38-813c-4b59-92c7-980a68eff33a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:57:15,777 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e515ae38-813c-4b59-92c7-980a68eff33a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:57:15,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e515ae38-813c-4b59-92c7-980a68eff33a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 21:57:15,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:57:15,953 INFO L262 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-06 21:57:15,957 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:57:16,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:57:16,245 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 53 [2023-11-06 21:57:16,411 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 159 treesize of output 103 [2023-11-06 21:57:17,147 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 21:57:17,147 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:57:18,300 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 21:57:18,300 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 229 treesize of output 141 [2023-11-06 21:57:18,311 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 53 [2023-11-06 21:57:18,322 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 47 [2023-11-06 21:57:18,655 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 21:57:18,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120114877] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:57:18,656 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:57:18,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 31 [2023-11-06 21:57:18,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882920435] [2023-11-06 21:57:18,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:57:18,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-06 21:57:18,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:57:18,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-06 21:57:18,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=945, Unknown=1, NotChecked=0, Total=1056