./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/chl-chromosome-trans.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/chl-chromosome-trans.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --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 795c382fbb0026f2f6f7212254176553809c7311a8058a10cea47f6b1b03373b --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-31 01:09:14,801 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-31 01:09:14,804 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-31 01:09:14,849 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-31 01:09:14,851 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-31 01:09:14,855 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-31 01:09:14,857 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-31 01:09:14,860 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-31 01:09:14,865 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-31 01:09:14,869 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-31 01:09:14,870 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-31 01:09:14,871 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-31 01:09:14,872 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-31 01:09:14,874 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-31 01:09:14,875 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-31 01:09:14,877 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-31 01:09:14,881 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-31 01:09:14,882 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-31 01:09:14,884 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-31 01:09:14,885 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-31 01:09:14,889 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-31 01:09:14,891 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-31 01:09:14,892 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-31 01:09:14,898 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-31 01:09:14,901 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-31 01:09:14,904 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-31 01:09:14,905 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-31 01:09:14,906 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-31 01:09:14,908 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-31 01:09:14,908 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-31 01:09:14,909 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-31 01:09:14,912 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-31 01:09:14,913 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-31 01:09:14,914 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-31 01:09:14,915 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-31 01:09:14,916 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-31 01:09:14,917 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-31 01:09:14,917 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-31 01:09:14,917 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-31 01:09:14,918 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-31 01:09:14,918 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-31 01:09:14,920 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-31 01:09:14,954 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-31 01:09:14,955 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-31 01:09:14,956 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-31 01:09:14,956 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-31 01:09:14,957 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-31 01:09:14,957 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-31 01:09:14,958 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-31 01:09:14,958 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-31 01:09:14,958 INFO L138 SettingsManager]: * Use SBE=true [2023-08-31 01:09:14,958 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-31 01:09:14,959 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-31 01:09:14,959 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-31 01:09:14,959 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-31 01:09:14,960 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-31 01:09:14,960 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-31 01:09:14,960 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-31 01:09:14,960 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-31 01:09:14,960 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-31 01:09:14,961 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-31 01:09:14,961 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-31 01:09:14,961 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-31 01:09:14,961 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-31 01:09:14,961 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-31 01:09:14,962 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-31 01:09:14,962 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 01:09:14,962 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-31 01:09:14,962 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-31 01:09:14,962 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-31 01:09:14,963 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-31 01:09:14,963 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-31 01:09:14,963 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-31 01:09:14,963 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-31 01:09:14,964 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-31 01:09:14,964 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-31 01:09:14,964 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-31 01:09:14,964 INFO L138 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:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 795c382fbb0026f2f6f7212254176553809c7311a8058a10cea47f6b1b03373b Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-31 01:09:15,279 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-31 01:09:15,302 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-31 01:09:15,305 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-31 01:09:15,306 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-31 01:09:15,306 INFO L275 PluginConnector]: CDTParser initialized [2023-08-31 01:09:15,308 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-chromosome-trans.wvr.c [2023-08-31 01:09:16,475 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-31 01:09:16,687 INFO L351 CDTParser]: Found 1 translation units. [2023-08-31 01:09:16,687 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-chromosome-trans.wvr.c [2023-08-31 01:09:16,694 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c6e9606ac/165b1b70ae244c32b0de0c63eeb378d8/FLAGc31559068 [2023-08-31 01:09:16,706 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c6e9606ac/165b1b70ae244c32b0de0c63eeb378d8 [2023-08-31 01:09:16,708 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-31 01:09:16,709 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-31 01:09:16,710 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-31 01:09:16,710 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-31 01:09:16,713 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-31 01:09:16,714 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 01:09:16" (1/1) ... [2023-08-31 01:09:16,715 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@651c1028 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:09:16, skipping insertion in model container [2023-08-31 01:09:16,715 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 01:09:16" (1/1) ... [2023-08-31 01:09:16,721 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-31 01:09:16,750 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-31 01:09:16,966 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-chromosome-trans.wvr.c[3034,3047] [2023-08-31 01:09:16,980 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 01:09:16,993 INFO L203 MainTranslator]: Completed pre-run [2023-08-31 01:09:17,035 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-chromosome-trans.wvr.c[3034,3047] [2023-08-31 01:09:17,039 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 01:09:17,059 INFO L208 MainTranslator]: Completed translation [2023-08-31 01:09:17,059 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:09:17 WrapperNode [2023-08-31 01:09:17,060 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-31 01:09:17,061 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-31 01:09:17,061 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-31 01:09:17,061 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-31 01:09:17,067 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:09:17" (1/1) ... [2023-08-31 01:09:17,090 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:09:17" (1/1) ... [2023-08-31 01:09:17,131 INFO L138 Inliner]: procedures = 26, calls = 46, calls flagged for inlining = 16, calls inlined = 24, statements flattened = 277 [2023-08-31 01:09:17,134 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-31 01:09:17,135 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-31 01:09:17,135 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-31 01:09:17,136 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-31 01:09:17,144 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:09:17" (1/1) ... [2023-08-31 01:09:17,145 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:09:17" (1/1) ... [2023-08-31 01:09:17,157 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:09:17" (1/1) ... [2023-08-31 01:09:17,160 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:09:17" (1/1) ... [2023-08-31 01:09:17,168 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:09:17" (1/1) ... [2023-08-31 01:09:17,183 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:09:17" (1/1) ... [2023-08-31 01:09:17,213 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:09:17" (1/1) ... [2023-08-31 01:09:17,215 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:09:17" (1/1) ... [2023-08-31 01:09:17,218 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-31 01:09:17,218 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-31 01:09:17,218 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-31 01:09:17,219 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-31 01:09:17,219 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:09:17" (1/1) ... [2023-08-31 01:09:17,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 01:09:17,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:09:17,271 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-31 01:09:17,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-31 01:09:17,311 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-31 01:09:17,312 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-31 01:09:17,312 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-31 01:09:17,312 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-31 01:09:17,312 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-31 01:09:17,313 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-31 01:09:17,313 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-31 01:09:17,313 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-31 01:09:17,313 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-31 01:09:17,313 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-31 01:09:17,313 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-31 01:09:17,313 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-31 01:09:17,314 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-31 01:09:17,314 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-31 01:09:17,314 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-31 01:09:17,316 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-31 01:09:17,473 INFO L236 CfgBuilder]: Building ICFG [2023-08-31 01:09:17,475 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-31 01:09:17,893 INFO L277 CfgBuilder]: Performing block encoding [2023-08-31 01:09:17,903 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-31 01:09:17,908 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-08-31 01:09:17,912 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 01:09:17 BoogieIcfgContainer [2023-08-31 01:09:17,913 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-31 01:09:17,915 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-31 01:09:17,915 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-31 01:09:17,924 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-31 01:09:17,926 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.08 01:09:16" (1/3) ... [2023-08-31 01:09:17,929 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b8ce98a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 01:09:17, skipping insertion in model container [2023-08-31 01:09:17,929 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:09:17" (2/3) ... [2023-08-31 01:09:17,937 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b8ce98a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 01:09:17, skipping insertion in model container [2023-08-31 01:09:17,937 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 01:09:17" (3/3) ... [2023-08-31 01:09:17,938 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-chromosome-trans.wvr.c [2023-08-31 01:09:17,946 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-31 01:09:17,962 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-31 01:09:17,963 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-31 01:09:17,963 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-31 01:09:18,065 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-31 01:09:18,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 300 places, 318 transitions, 660 flow [2023-08-31 01:09:18,233 INFO L130 PetriNetUnfolder]: 28/315 cut-off events. [2023-08-31 01:09:18,234 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-31 01:09:18,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 328 conditions, 315 events. 28/315 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 492 event pairs, 0 based on Foata normal form. 0/286 useless extension candidates. Maximal degree in co-relation 244. Up to 2 conditions per place. [2023-08-31 01:09:18,241 INFO L82 GeneralOperation]: Start removeDead. Operand has 300 places, 318 transitions, 660 flow [2023-08-31 01:09:18,247 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 287 places, 305 transitions, 628 flow [2023-08-31 01:09:18,250 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 01:09:18,257 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 287 places, 305 transitions, 628 flow [2023-08-31 01:09:18,260 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 287 places, 305 transitions, 628 flow [2023-08-31 01:09:18,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 287 places, 305 transitions, 628 flow [2023-08-31 01:09:18,341 INFO L130 PetriNetUnfolder]: 28/305 cut-off events. [2023-08-31 01:09:18,341 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-31 01:09:18,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 318 conditions, 305 events. 28/305 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 491 event pairs, 0 based on Foata normal form. 0/277 useless extension candidates. Maximal degree in co-relation 244. Up to 2 conditions per place. [2023-08-31 01:09:18,355 INFO L119 LiptonReduction]: Number of co-enabled transitions 15390 [2023-08-31 01:09:26,360 INFO L134 LiptonReduction]: Checked pairs total: 14128 [2023-08-31 01:09:26,360 INFO L136 LiptonReduction]: Total number of compositions: 343 [2023-08-31 01:09:26,376 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-31 01:09:26,382 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;@834a2f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 01:09:26,383 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-31 01:09:26,389 INFO L130 PetriNetUnfolder]: 7/30 cut-off events. [2023-08-31 01:09:26,390 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-31 01:09:26,390 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:09:26,391 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:09:26,391 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)] === [2023-08-31 01:09:26,396 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:09:26,396 INFO L85 PathProgramCache]: Analyzing trace with hash -153494726, now seen corresponding path program 1 times [2023-08-31 01:09:26,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:09:26,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918570899] [2023-08-31 01:09:26,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:09:26,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:09:26,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:09:26,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:09:26,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:09:26,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918570899] [2023-08-31 01:09:26,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918570899] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:09:26,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:09:26,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 01:09:26,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102919341] [2023-08-31 01:09:26,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:09:26,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 01:09:26,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:09:26,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 01:09:26,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 01:09:26,987 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 277 out of 661 [2023-08-31 01:09:26,991 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 31 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 284.3333333333333) internal successors, (853), 3 states have internal predecessors, (853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:09:26,991 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:09:26,992 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 277 of 661 [2023-08-31 01:09:26,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:09:27,117 INFO L130 PetriNetUnfolder]: 370/545 cut-off events. [2023-08-31 01:09:27,119 INFO L131 PetriNetUnfolder]: For 39/39 co-relation queries the response was YES. [2023-08-31 01:09:27,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1153 conditions, 545 events. 370/545 cut-off events. For 39/39 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1531 event pairs, 253 based on Foata normal form. 0/428 useless extension candidates. Maximal degree in co-relation 936. Up to 543 conditions per place. [2023-08-31 01:09:27,124 INFO L137 encePairwiseOnDemand]: 653/661 looper letters, 27 selfloop transitions, 6 changer transitions 0/33 dead transitions. [2023-08-31 01:09:27,124 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 33 transitions, 150 flow [2023-08-31 01:09:27,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 01:09:27,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 01:09:27,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 868 transitions. [2023-08-31 01:09:27,146 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.437720625315179 [2023-08-31 01:09:27,147 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 868 transitions. [2023-08-31 01:09:27,148 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 868 transitions. [2023-08-31 01:09:27,152 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:09:27,154 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 868 transitions. [2023-08-31 01:09:27,160 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 289.3333333333333) internal successors, (868), 3 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:09:27,168 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 661.0) internal successors, (2644), 4 states have internal predecessors, (2644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:09:27,169 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 661.0) internal successors, (2644), 4 states have internal predecessors, (2644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:09:27,171 INFO L175 Difference]: Start difference. First operand has 34 places, 31 transitions, 80 flow. Second operand 3 states and 868 transitions. [2023-08-31 01:09:27,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 33 transitions, 150 flow [2023-08-31 01:09:27,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 33 transitions, 138 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-31 01:09:27,178 INFO L231 Difference]: Finished difference. Result has 31 places, 33 transitions, 98 flow [2023-08-31 01:09:27,180 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=661, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=31, PETRI_TRANSITIONS=33} [2023-08-31 01:09:27,186 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, -3 predicate places. [2023-08-31 01:09:27,186 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 33 transitions, 98 flow [2023-08-31 01:09:27,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 284.3333333333333) internal successors, (853), 3 states have internal predecessors, (853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:09:27,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:09:27,188 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:09:27,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-31 01:09:27,189 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)] === [2023-08-31 01:09:27,193 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:09:27,193 INFO L85 PathProgramCache]: Analyzing trace with hash 567514681, now seen corresponding path program 1 times [2023-08-31 01:09:27,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:09:27,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732689692] [2023-08-31 01:09:27,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:09:27,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:09:27,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:09:27,455 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 01:09:27,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:09:27,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732689692] [2023-08-31 01:09:27,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732689692] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:09:27,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838227076] [2023-08-31 01:09:27,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:09:27,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:09:27,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:09:27,469 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:09:27,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-31 01:09:27,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:09:27,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-31 01:09:27,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:09:27,746 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 01:09:27,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:09:27,782 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 01:09:27,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838227076] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:09:27,783 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:09:27,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2023-08-31 01:09:27,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139455504] [2023-08-31 01:09:27,784 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:09:27,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-31 01:09:27,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:09:27,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-31 01:09:27,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2023-08-31 01:09:27,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 271 out of 661 [2023-08-31 01:09:27,948 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 33 transitions, 98 flow. Second operand has 8 states, 8 states have (on average 274.875) internal successors, (2199), 8 states have internal predecessors, (2199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:09:27,948 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:09:27,948 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 271 of 661 [2023-08-31 01:09:27,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:09:28,082 INFO L130 PetriNetUnfolder]: 370/554 cut-off events. [2023-08-31 01:09:28,082 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-31 01:09:28,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1155 conditions, 554 events. 370/554 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1529 event pairs, 253 based on Foata normal form. 6/445 useless extension candidates. Maximal degree in co-relation 1106. Up to 543 conditions per place. [2023-08-31 01:09:28,085 INFO L137 encePairwiseOnDemand]: 654/661 looper letters, 27 selfloop transitions, 15 changer transitions 0/42 dead transitions. [2023-08-31 01:09:28,086 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 42 transitions, 218 flow [2023-08-31 01:09:28,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 01:09:28,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 01:09:28,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1677 transitions. [2023-08-31 01:09:28,091 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4228441754916793 [2023-08-31 01:09:28,091 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1677 transitions. [2023-08-31 01:09:28,092 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1677 transitions. [2023-08-31 01:09:28,092 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:09:28,093 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1677 transitions. [2023-08-31 01:09:28,096 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 279.5) internal successors, (1677), 6 states have internal predecessors, (1677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:09:28,102 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 661.0) internal successors, (4627), 7 states have internal predecessors, (4627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:09:28,104 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 661.0) internal successors, (4627), 7 states have internal predecessors, (4627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:09:28,104 INFO L175 Difference]: Start difference. First operand has 31 places, 33 transitions, 98 flow. Second operand 6 states and 1677 transitions. [2023-08-31 01:09:28,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 42 transitions, 218 flow [2023-08-31 01:09:28,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 42 transitions, 212 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-31 01:09:28,107 INFO L231 Difference]: Finished difference. Result has 38 places, 42 transitions, 188 flow [2023-08-31 01:09:28,107 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=661, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=188, PETRI_PLACES=38, PETRI_TRANSITIONS=42} [2023-08-31 01:09:28,108 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 4 predicate places. [2023-08-31 01:09:28,108 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 42 transitions, 188 flow [2023-08-31 01:09:28,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 274.875) internal successors, (2199), 8 states have internal predecessors, (2199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:09:28,110 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:09:28,110 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:09:28,121 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-31 01:09:28,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:09:28,319 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)] === [2023-08-31 01:09:28,319 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:09:28,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1258852288, now seen corresponding path program 2 times [2023-08-31 01:09:28,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:09:28,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010693502] [2023-08-31 01:09:28,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:09:28,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:09:28,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:09:28,554 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-31 01:09:28,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:09:28,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010693502] [2023-08-31 01:09:28,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010693502] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:09:28,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645210188] [2023-08-31 01:09:28,555 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 01:09:28,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:09:28,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:09:28,557 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:09:28,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-31 01:09:28,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-31 01:09:28,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:09:28,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-31 01:09:28,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:09:28,711 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:09:28,711 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 01:09:28,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645210188] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:09:28,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-31 01:09:28,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2023-08-31 01:09:28,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062887130] [2023-08-31 01:09:28,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:09:28,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 01:09:28,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:09:28,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 01:09:28,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-08-31 01:09:28,735 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 284 out of 661 [2023-08-31 01:09:28,737 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 42 transitions, 188 flow. Second operand has 4 states, 4 states have (on average 290.25) internal successors, (1161), 4 states have internal predecessors, (1161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:09:28,737 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:09:28,737 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 284 of 661 [2023-08-31 01:09:28,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:09:28,956 INFO L130 PetriNetUnfolder]: 644/962 cut-off events. [2023-08-31 01:09:28,956 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2023-08-31 01:09:28,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2016 conditions, 962 events. 644/962 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 3428 event pairs, 253 based on Foata normal form. 14/762 useless extension candidates. Maximal degree in co-relation 1928. Up to 555 conditions per place. [2023-08-31 01:09:28,961 INFO L137 encePairwiseOnDemand]: 657/661 looper letters, 69 selfloop transitions, 3 changer transitions 2/74 dead transitions. [2023-08-31 01:09:28,961 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 74 transitions, 407 flow [2023-08-31 01:09:28,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 01:09:28,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 01:09:28,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1199 transitions. [2023-08-31 01:09:28,965 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45347957639939485 [2023-08-31 01:09:28,965 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1199 transitions. [2023-08-31 01:09:28,965 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1199 transitions. [2023-08-31 01:09:28,966 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:09:28,966 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1199 transitions. [2023-08-31 01:09:28,968 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 299.75) internal successors, (1199), 4 states have internal predecessors, (1199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:09:28,972 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 661.0) internal successors, (3305), 5 states have internal predecessors, (3305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:09:28,974 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 661.0) internal successors, (3305), 5 states have internal predecessors, (3305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:09:28,974 INFO L175 Difference]: Start difference. First operand has 38 places, 42 transitions, 188 flow. Second operand 4 states and 1199 transitions. [2023-08-31 01:09:28,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 74 transitions, 407 flow [2023-08-31 01:09:28,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 74 transitions, 383 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-08-31 01:09:28,977 INFO L231 Difference]: Finished difference. Result has 42 places, 44 transitions, 184 flow [2023-08-31 01:09:28,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=661, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=184, PETRI_PLACES=42, PETRI_TRANSITIONS=44} [2023-08-31 01:09:28,978 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 8 predicate places. [2023-08-31 01:09:28,978 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 44 transitions, 184 flow [2023-08-31 01:09:28,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 290.25) internal successors, (1161), 4 states have internal predecessors, (1161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:09:28,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:09:28,979 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:09:28,991 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-31 01:09:29,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-08-31 01:09:29,186 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)] === [2023-08-31 01:09:29,187 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:09:29,187 INFO L85 PathProgramCache]: Analyzing trace with hash 445073096, now seen corresponding path program 3 times [2023-08-31 01:09:29,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:09:29,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846474503] [2023-08-31 01:09:29,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:09:29,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:09:29,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:09:29,415 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-31 01:09:29,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:09:29,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846474503] [2023-08-31 01:09:29,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846474503] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:09:29,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694776474] [2023-08-31 01:09:29,417 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 01:09:29,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:09:29,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:09:29,418 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:09:29,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-31 01:09:29,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-08-31 01:09:29,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:09:29,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-31 01:09:29,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:09:29,584 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:09:29,584 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 01:09:29,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694776474] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:09:29,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-31 01:09:29,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2023-08-31 01:09:29,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807500056] [2023-08-31 01:09:29,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:09:29,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 01:09:29,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:09:29,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 01:09:29,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-08-31 01:09:29,609 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 283 out of 661 [2023-08-31 01:09:29,611 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 44 transitions, 184 flow. Second operand has 4 states, 4 states have (on average 289.25) internal successors, (1157), 4 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:09:29,611 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:09:29,611 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 283 of 661 [2023-08-31 01:09:29,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:09:29,854 INFO L130 PetriNetUnfolder]: 758/1124 cut-off events. [2023-08-31 01:09:29,854 INFO L131 PetriNetUnfolder]: For 337/337 co-relation queries the response was YES. [2023-08-31 01:09:29,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2677 conditions, 1124 events. 758/1124 cut-off events. For 337/337 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 4232 event pairs, 104 based on Foata normal form. 24/974 useless extension candidates. Maximal degree in co-relation 2598. Up to 775 conditions per place. [2023-08-31 01:09:29,860 INFO L137 encePairwiseOnDemand]: 655/661 looper letters, 63 selfloop transitions, 5 changer transitions 1/69 dead transitions. [2023-08-31 01:09:29,861 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 69 transitions, 392 flow [2023-08-31 01:09:29,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 01:09:29,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 01:09:29,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1186 transitions. [2023-08-31 01:09:29,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4485627836611195 [2023-08-31 01:09:29,864 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1186 transitions. [2023-08-31 01:09:29,864 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1186 transitions. [2023-08-31 01:09:29,865 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:09:29,865 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1186 transitions. [2023-08-31 01:09:29,868 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 296.5) internal successors, (1186), 4 states have internal predecessors, (1186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:09:29,872 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 661.0) internal successors, (3305), 5 states have internal predecessors, (3305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:09:29,873 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 661.0) internal successors, (3305), 5 states have internal predecessors, (3305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:09:29,873 INFO L175 Difference]: Start difference. First operand has 42 places, 44 transitions, 184 flow. Second operand 4 states and 1186 transitions. [2023-08-31 01:09:29,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 69 transitions, 392 flow [2023-08-31 01:09:29,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 69 transitions, 387 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-31 01:09:29,880 INFO L231 Difference]: Finished difference. Result has 46 places, 46 transitions, 213 flow [2023-08-31 01:09:29,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=661, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=213, PETRI_PLACES=46, PETRI_TRANSITIONS=46} [2023-08-31 01:09:29,882 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 12 predicate places. [2023-08-31 01:09:29,882 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 46 transitions, 213 flow [2023-08-31 01:09:29,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 289.25) internal successors, (1157), 4 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:09:29,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:09:29,883 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:09:29,892 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-31 01:09:30,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:09:30,090 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)] === [2023-08-31 01:09:30,091 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:09:30,091 INFO L85 PathProgramCache]: Analyzing trace with hash -447520588, now seen corresponding path program 4 times [2023-08-31 01:09:30,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:09:30,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823625088] [2023-08-31 01:09:30,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:09:30,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:09:30,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:09:30,288 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-31 01:09:30,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:09:30,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823625088] [2023-08-31 01:09:30,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823625088] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:09:30,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986174815] [2023-08-31 01:09:30,290 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 01:09:30,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:09:30,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:09:30,291 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:09:30,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-31 01:09:30,448 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 01:09:30,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:09:30,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-31 01:09:30,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:09:30,534 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-31 01:09:30,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:09:30,606 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-31 01:09:30,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986174815] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:09:30,607 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:09:30,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2023-08-31 01:09:30,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298550416] [2023-08-31 01:09:30,607 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:09:30,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-31 01:09:30,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:09:30,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-31 01:09:30,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=166, Unknown=0, NotChecked=0, Total=272 [2023-08-31 01:09:30,878 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 271 out of 661 [2023-08-31 01:09:30,882 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 46 transitions, 213 flow. Second operand has 17 states, 17 states have (on average 273.3529411764706) internal successors, (4647), 17 states have internal predecessors, (4647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:09:30,883 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:09:30,883 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 271 of 661 [2023-08-31 01:09:30,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:09:31,128 INFO L130 PetriNetUnfolder]: 758/1127 cut-off events. [2023-08-31 01:09:31,128 INFO L131 PetriNetUnfolder]: For 961/961 co-relation queries the response was YES. [2023-08-31 01:09:31,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2864 conditions, 1127 events. 758/1127 cut-off events. For 961/961 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 3903 event pairs, 525 based on Foata normal form. 1/954 useless extension candidates. Maximal degree in co-relation 2770. Up to 1113 conditions per place. [2023-08-31 01:09:31,135 INFO L137 encePairwiseOnDemand]: 654/661 looper letters, 31 selfloop transitions, 18 changer transitions 0/49 dead transitions. [2023-08-31 01:09:31,135 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 49 transitions, 329 flow [2023-08-31 01:09:31,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-31 01:09:31,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-31 01:09:31,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1945 transitions. [2023-08-31 01:09:31,140 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42035876377782583 [2023-08-31 01:09:31,141 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1945 transitions. [2023-08-31 01:09:31,141 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1945 transitions. [2023-08-31 01:09:31,142 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:09:31,142 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1945 transitions. [2023-08-31 01:09:31,147 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 277.85714285714283) internal successors, (1945), 7 states have internal predecessors, (1945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:09:31,153 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 661.0) internal successors, (5288), 8 states have internal predecessors, (5288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:09:31,155 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 661.0) internal successors, (5288), 8 states have internal predecessors, (5288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:09:31,155 INFO L175 Difference]: Start difference. First operand has 46 places, 46 transitions, 213 flow. Second operand 7 states and 1945 transitions. [2023-08-31 01:09:31,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 49 transitions, 329 flow [2023-08-31 01:09:31,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 49 transitions, 326 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-31 01:09:31,159 INFO L231 Difference]: Finished difference. Result has 52 places, 49 transitions, 278 flow [2023-08-31 01:09:31,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=661, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=278, PETRI_PLACES=52, PETRI_TRANSITIONS=49} [2023-08-31 01:09:31,162 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 18 predicate places. [2023-08-31 01:09:31,162 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 49 transitions, 278 flow [2023-08-31 01:09:31,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 273.3529411764706) internal successors, (4647), 17 states have internal predecessors, (4647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:09:31,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:09:31,164 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:09:31,173 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-31 01:09:31,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:09:31,371 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)] === [2023-08-31 01:09:31,371 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:09:31,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1897962517, now seen corresponding path program 5 times [2023-08-31 01:09:31,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:09:31,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988764133] [2023-08-31 01:09:31,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:09:31,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:09:31,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:09:31,771 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-31 01:09:31,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:09:31,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988764133] [2023-08-31 01:09:31,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988764133] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:09:31,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:09:31,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-31 01:09:31,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143085554] [2023-08-31 01:09:31,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:09:31,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 01:09:31,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:09:31,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 01:09:31,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-31 01:09:31,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 282 out of 661 [2023-08-31 01:09:31,808 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 49 transitions, 278 flow. Second operand has 4 states, 4 states have (on average 288.25) internal successors, (1153), 4 states have internal predecessors, (1153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:09:31,809 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:09:31,809 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 282 of 661 [2023-08-31 01:09:31,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:09:32,023 INFO L130 PetriNetUnfolder]: 659/978 cut-off events. [2023-08-31 01:09:32,023 INFO L131 PetriNetUnfolder]: For 654/654 co-relation queries the response was YES. [2023-08-31 01:09:32,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2516 conditions, 978 events. 659/978 cut-off events. For 654/654 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 3439 event pairs, 229 based on Foata normal form. 24/858 useless extension candidates. Maximal degree in co-relation 2402. Up to 582 conditions per place. [2023-08-31 01:09:32,029 INFO L137 encePairwiseOnDemand]: 656/661 looper letters, 68 selfloop transitions, 6 changer transitions 3/77 dead transitions. [2023-08-31 01:09:32,029 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 77 transitions, 501 flow [2023-08-31 01:09:32,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 01:09:32,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 01:09:32,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1189 transitions. [2023-08-31 01:09:32,034 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44969742813918306 [2023-08-31 01:09:32,035 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1189 transitions. [2023-08-31 01:09:32,035 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1189 transitions. [2023-08-31 01:09:32,035 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:09:32,035 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1189 transitions. [2023-08-31 01:09:32,038 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 297.25) internal successors, (1189), 4 states have internal predecessors, (1189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:09:32,041 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 661.0) internal successors, (3305), 5 states have internal predecessors, (3305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:09:32,042 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 661.0) internal successors, (3305), 5 states have internal predecessors, (3305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:09:32,042 INFO L175 Difference]: Start difference. First operand has 52 places, 49 transitions, 278 flow. Second operand 4 states and 1189 transitions. [2023-08-31 01:09:32,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 77 transitions, 501 flow [2023-08-31 01:09:32,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 77 transitions, 465 flow, removed 6 selfloop flow, removed 4 redundant places. [2023-08-31 01:09:32,047 INFO L231 Difference]: Finished difference. Result has 52 places, 50 transitions, 262 flow [2023-08-31 01:09:32,047 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=661, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=262, PETRI_PLACES=52, PETRI_TRANSITIONS=50} [2023-08-31 01:09:32,049 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 18 predicate places. [2023-08-31 01:09:32,050 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 50 transitions, 262 flow [2023-08-31 01:09:32,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 288.25) internal successors, (1153), 4 states have internal predecessors, (1153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:09:32,051 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:09:32,051 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:09:32,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-31 01:09:32,051 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)] === [2023-08-31 01:09:32,052 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:09:32,052 INFO L85 PathProgramCache]: Analyzing trace with hash 372837355, now seen corresponding path program 1 times [2023-08-31 01:09:32,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:09:32,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272209933] [2023-08-31 01:09:32,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:09:32,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:09:32,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:09:32,370 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-08-31 01:09:32,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:09:32,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272209933] [2023-08-31 01:09:32,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272209933] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:09:32,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:09:32,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 01:09:32,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546843013] [2023-08-31 01:09:32,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:09:32,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 01:09:32,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:09:32,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 01:09:32,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-31 01:09:32,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 278 out of 661 [2023-08-31 01:09:32,412 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 50 transitions, 262 flow. Second operand has 4 states, 4 states have (on average 284.75) internal successors, (1139), 4 states have internal predecessors, (1139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:09:32,412 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:09:32,413 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 278 of 661 [2023-08-31 01:09:32,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:09:32,640 INFO L130 PetriNetUnfolder]: 976/1420 cut-off events. [2023-08-31 01:09:32,640 INFO L131 PetriNetUnfolder]: For 1859/1859 co-relation queries the response was YES. [2023-08-31 01:09:32,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3968 conditions, 1420 events. 976/1420 cut-off events. For 1859/1859 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 5119 event pairs, 250 based on Foata normal form. 1/1175 useless extension candidates. Maximal degree in co-relation 3870. Up to 916 conditions per place. [2023-08-31 01:09:32,648 INFO L137 encePairwiseOnDemand]: 655/661 looper letters, 71 selfloop transitions, 6 changer transitions 2/79 dead transitions. [2023-08-31 01:09:32,649 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 79 transitions, 548 flow [2023-08-31 01:09:32,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 01:09:32,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 01:09:32,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1167 transitions. [2023-08-31 01:09:32,652 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4413767019667171 [2023-08-31 01:09:32,652 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1167 transitions. [2023-08-31 01:09:32,652 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1167 transitions. [2023-08-31 01:09:32,653 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:09:32,653 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1167 transitions. [2023-08-31 01:09:32,655 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 291.75) internal successors, (1167), 4 states have internal predecessors, (1167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:09:32,658 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 661.0) internal successors, (3305), 5 states have internal predecessors, (3305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:09:32,659 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 661.0) internal successors, (3305), 5 states have internal predecessors, (3305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:09:32,660 INFO L175 Difference]: Start difference. First operand has 52 places, 50 transitions, 262 flow. Second operand 4 states and 1167 transitions. [2023-08-31 01:09:32,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 79 transitions, 548 flow [2023-08-31 01:09:32,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 79 transitions, 520 flow, removed 5 selfloop flow, removed 3 redundant places. [2023-08-31 01:09:32,664 INFO L231 Difference]: Finished difference. Result has 53 places, 54 transitions, 294 flow [2023-08-31 01:09:32,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=661, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=294, PETRI_PLACES=53, PETRI_TRANSITIONS=54} [2023-08-31 01:09:32,664 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 19 predicate places. [2023-08-31 01:09:32,665 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 54 transitions, 294 flow [2023-08-31 01:09:32,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 284.75) internal successors, (1139), 4 states have internal predecessors, (1139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:09:32,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:09:32,666 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:09:32,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-31 01:09:32,666 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)] === [2023-08-31 01:09:32,666 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:09:32,667 INFO L85 PathProgramCache]: Analyzing trace with hash -1786123932, now seen corresponding path program 1 times [2023-08-31 01:09:32,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:09:32,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012715617] [2023-08-31 01:09:32,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:09:32,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:09:32,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:09:32,940 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-08-31 01:09:32,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:09:32,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012715617] [2023-08-31 01:09:32,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012715617] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:09:32,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:09:32,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-31 01:09:32,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764259921] [2023-08-31 01:09:32,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:09:32,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 01:09:32,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:09:32,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 01:09:32,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-31 01:09:32,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 281 out of 661 [2023-08-31 01:09:32,987 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 54 transitions, 294 flow. Second operand has 5 states, 5 states have (on average 286.6) internal successors, (1433), 5 states have internal predecessors, (1433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:09:32,987 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:09:32,987 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 281 of 661 [2023-08-31 01:09:32,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:09:33,451 INFO L130 PetriNetUnfolder]: 1778/2594 cut-off events. [2023-08-31 01:09:33,451 INFO L131 PetriNetUnfolder]: For 2916/2916 co-relation queries the response was YES. [2023-08-31 01:09:33,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7286 conditions, 2594 events. 1778/2594 cut-off events. For 2916/2916 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 11140 event pairs, 691 based on Foata normal form. 20/2402 useless extension candidates. Maximal degree in co-relation 7186. Up to 1445 conditions per place. [2023-08-31 01:09:33,466 INFO L137 encePairwiseOnDemand]: 656/661 looper letters, 85 selfloop transitions, 5 changer transitions 17/107 dead transitions. [2023-08-31 01:09:33,467 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 107 transitions, 719 flow [2023-08-31 01:09:33,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 01:09:33,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 01:09:33,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1478 transitions. [2023-08-31 01:09:33,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44720121028744325 [2023-08-31 01:09:33,471 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1478 transitions. [2023-08-31 01:09:33,471 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1478 transitions. [2023-08-31 01:09:33,472 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:09:33,472 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1478 transitions. [2023-08-31 01:09:33,475 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 295.6) internal successors, (1478), 5 states have internal predecessors, (1478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:09:33,479 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 661.0) internal successors, (3966), 6 states have internal predecessors, (3966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:09:33,480 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 661.0) internal successors, (3966), 6 states have internal predecessors, (3966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:09:33,480 INFO L175 Difference]: Start difference. First operand has 53 places, 54 transitions, 294 flow. Second operand 5 states and 1478 transitions. [2023-08-31 01:09:33,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 107 transitions, 719 flow [2023-08-31 01:09:33,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 107 transitions, 717 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-08-31 01:09:33,486 INFO L231 Difference]: Finished difference. Result has 60 places, 56 transitions, 320 flow [2023-08-31 01:09:33,486 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=661, PETRI_DIFFERENCE_MINUEND_FLOW=292, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=320, PETRI_PLACES=60, PETRI_TRANSITIONS=56} [2023-08-31 01:09:33,488 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 26 predicate places. [2023-08-31 01:09:33,488 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 56 transitions, 320 flow [2023-08-31 01:09:33,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 286.6) internal successors, (1433), 5 states have internal predecessors, (1433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:09:33,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:09:33,489 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:09:33,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-31 01:09:33,489 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)] === [2023-08-31 01:09:33,490 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:09:33,490 INFO L85 PathProgramCache]: Analyzing trace with hash 412239492, now seen corresponding path program 2 times [2023-08-31 01:09:33,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:09:33,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722948447] [2023-08-31 01:09:33,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:09:33,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:09:33,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:09:33,813 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-08-31 01:09:33,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:09:33,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722948447] [2023-08-31 01:09:33,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722948447] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:09:33,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605443093] [2023-08-31 01:09:33,813 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 01:09:33,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:09:33,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:09:33,815 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:09:33,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-31 01:09:34,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 01:09:34,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:09:34,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-31 01:09:34,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:09:34,213 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-08-31 01:09:34,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:09:34,274 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-08-31 01:09:34,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605443093] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-31 01:09:34,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-31 01:09:34,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 8 [2023-08-31 01:09:34,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066681896] [2023-08-31 01:09:34,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:09:34,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 01:09:34,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:09:34,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 01:09:34,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-08-31 01:09:34,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 279 out of 661 [2023-08-31 01:09:34,314 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 56 transitions, 320 flow. Second operand has 5 states, 5 states have (on average 284.6) internal successors, (1423), 5 states have internal predecessors, (1423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:09:34,315 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:09:34,315 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 279 of 661 [2023-08-31 01:09:34,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:09:34,825 INFO L130 PetriNetUnfolder]: 1810/2621 cut-off events. [2023-08-31 01:09:34,826 INFO L131 PetriNetUnfolder]: For 4276/4276 co-relation queries the response was YES. [2023-08-31 01:09:34,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8286 conditions, 2621 events. 1810/2621 cut-off events. For 4276/4276 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 10967 event pairs, 221 based on Foata normal form. 36/2657 useless extension candidates. Maximal degree in co-relation 8182. Up to 695 conditions per place. [2023-08-31 01:09:34,844 INFO L137 encePairwiseOnDemand]: 653/661 looper letters, 113 selfloop transitions, 18 changer transitions 4/135 dead transitions. [2023-08-31 01:09:34,844 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 135 transitions, 962 flow [2023-08-31 01:09:34,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-31 01:09:34,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-31 01:09:34,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2042 transitions. [2023-08-31 01:09:34,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44132267127728547 [2023-08-31 01:09:34,850 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2042 transitions. [2023-08-31 01:09:34,851 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2042 transitions. [2023-08-31 01:09:34,852 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:09:34,852 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2042 transitions. [2023-08-31 01:09:34,856 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 291.7142857142857) internal successors, (2042), 7 states have internal predecessors, (2042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:09:34,862 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 661.0) internal successors, (5288), 8 states have internal predecessors, (5288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:09:34,863 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 661.0) internal successors, (5288), 8 states have internal predecessors, (5288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:09:34,863 INFO L175 Difference]: Start difference. First operand has 60 places, 56 transitions, 320 flow. Second operand 7 states and 2042 transitions. [2023-08-31 01:09:34,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 135 transitions, 962 flow [2023-08-31 01:09:34,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 135 transitions, 948 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-31 01:09:34,875 INFO L231 Difference]: Finished difference. Result has 65 places, 67 transitions, 425 flow [2023-08-31 01:09:34,875 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=661, PETRI_DIFFERENCE_MINUEND_FLOW=314, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=425, PETRI_PLACES=65, PETRI_TRANSITIONS=67} [2023-08-31 01:09:34,876 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 31 predicate places. [2023-08-31 01:09:34,876 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 67 transitions, 425 flow [2023-08-31 01:09:34,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 284.6) internal successors, (1423), 5 states have internal predecessors, (1423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:09:34,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:09:34,877 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:09:34,887 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-31 01:09:35,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:09:35,085 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)] === [2023-08-31 01:09:35,086 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:09:35,086 INFO L85 PathProgramCache]: Analyzing trace with hash -191395198, now seen corresponding path program 3 times [2023-08-31 01:09:35,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:09:35,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217514789] [2023-08-31 01:09:35,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:09:35,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:09:35,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:09:35,378 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-08-31 01:09:35,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:09:35,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217514789] [2023-08-31 01:09:35,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217514789] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:09:35,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:09:35,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-31 01:09:35,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543143975] [2023-08-31 01:09:35,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:09:35,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 01:09:35,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:09:35,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 01:09:35,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-31 01:09:35,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 280 out of 661 [2023-08-31 01:09:35,443 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 67 transitions, 425 flow. Second operand has 5 states, 5 states have (on average 285.6) internal successors, (1428), 5 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:09:35,443 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:09:35,443 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 280 of 661 [2023-08-31 01:09:35,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:09:35,951 INFO L130 PetriNetUnfolder]: 2058/2982 cut-off events. [2023-08-31 01:09:35,952 INFO L131 PetriNetUnfolder]: For 5964/5964 co-relation queries the response was YES. [2023-08-31 01:09:35,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10320 conditions, 2982 events. 2058/2982 cut-off events. For 5964/5964 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 12878 event pairs, 633 based on Foata normal form. 20/3002 useless extension candidates. Maximal degree in co-relation 10214. Up to 1481 conditions per place. [2023-08-31 01:09:35,971 INFO L137 encePairwiseOnDemand]: 656/661 looper letters, 93 selfloop transitions, 13 changer transitions 16/122 dead transitions. [2023-08-31 01:09:35,971 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 122 transitions, 927 flow [2023-08-31 01:09:35,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 01:09:35,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 01:09:35,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1473 transitions. [2023-08-31 01:09:35,976 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44568835098335857 [2023-08-31 01:09:35,976 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1473 transitions. [2023-08-31 01:09:35,976 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1473 transitions. [2023-08-31 01:09:35,977 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:09:35,977 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1473 transitions. [2023-08-31 01:09:35,979 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 294.6) internal successors, (1473), 5 states have internal predecessors, (1473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:09:35,984 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 661.0) internal successors, (3966), 6 states have internal predecessors, (3966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:09:35,984 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 661.0) internal successors, (3966), 6 states have internal predecessors, (3966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:09:35,985 INFO L175 Difference]: Start difference. First operand has 65 places, 67 transitions, 425 flow. Second operand 5 states and 1473 transitions. [2023-08-31 01:09:35,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 122 transitions, 927 flow [2023-08-31 01:09:36,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 122 transitions, 912 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-31 01:09:36,009 INFO L231 Difference]: Finished difference. Result has 71 places, 72 transitions, 507 flow [2023-08-31 01:09:36,010 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=661, PETRI_DIFFERENCE_MINUEND_FLOW=418, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=507, PETRI_PLACES=71, PETRI_TRANSITIONS=72} [2023-08-31 01:09:36,010 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 37 predicate places. [2023-08-31 01:09:36,011 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 72 transitions, 507 flow [2023-08-31 01:09:36,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 285.6) internal successors, (1428), 5 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:09:36,011 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:09:36,011 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:09:36,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-31 01:09:36,012 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)] === [2023-08-31 01:09:36,012 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:09:36,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1805816700, now seen corresponding path program 4 times [2023-08-31 01:09:36,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:09:36,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483329033] [2023-08-31 01:09:36,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:09:36,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:09:36,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:09:36,293 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-08-31 01:09:36,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:09:36,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483329033] [2023-08-31 01:09:36,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483329033] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:09:36,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:09:36,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-31 01:09:36,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65475981] [2023-08-31 01:09:36,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:09:36,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 01:09:36,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:09:36,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 01:09:36,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-31 01:09:36,334 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 280 out of 661 [2023-08-31 01:09:36,335 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 72 transitions, 507 flow. Second operand has 5 states, 5 states have (on average 285.6) internal successors, (1428), 5 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:09:36,335 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:09:36,336 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 280 of 661 [2023-08-31 01:09:36,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:09:36,810 INFO L130 PetriNetUnfolder]: 1966/2849 cut-off events. [2023-08-31 01:09:36,810 INFO L131 PetriNetUnfolder]: For 7858/7858 co-relation queries the response was YES. [2023-08-31 01:09:36,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10552 conditions, 2849 events. 1966/2849 cut-off events. For 7858/7858 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 12097 event pairs, 683 based on Foata normal form. 20/2869 useless extension candidates. Maximal degree in co-relation 10442. Up to 1800 conditions per place. [2023-08-31 01:09:36,871 INFO L137 encePairwiseOnDemand]: 656/661 looper letters, 87 selfloop transitions, 14 changer transitions 18/119 dead transitions. [2023-08-31 01:09:36,871 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 119 transitions, 984 flow [2023-08-31 01:09:36,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 01:09:36,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 01:09:36,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1470 transitions. [2023-08-31 01:09:36,876 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44478063540090773 [2023-08-31 01:09:36,876 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1470 transitions. [2023-08-31 01:09:36,876 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1470 transitions. [2023-08-31 01:09:36,877 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:09:36,877 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1470 transitions. [2023-08-31 01:09:36,880 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 294.0) internal successors, (1470), 5 states have internal predecessors, (1470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:09:36,884 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 661.0) internal successors, (3966), 6 states have internal predecessors, (3966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:09:36,885 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 661.0) internal successors, (3966), 6 states have internal predecessors, (3966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:09:36,885 INFO L175 Difference]: Start difference. First operand has 71 places, 72 transitions, 507 flow. Second operand 5 states and 1470 transitions. [2023-08-31 01:09:36,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 119 transitions, 984 flow [2023-08-31 01:09:36,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 119 transitions, 967 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-08-31 01:09:36,937 INFO L231 Difference]: Finished difference. Result has 74 places, 76 transitions, 590 flow [2023-08-31 01:09:36,938 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=661, PETRI_DIFFERENCE_MINUEND_FLOW=494, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=590, PETRI_PLACES=74, PETRI_TRANSITIONS=76} [2023-08-31 01:09:36,938 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 40 predicate places. [2023-08-31 01:09:36,938 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 76 transitions, 590 flow [2023-08-31 01:09:36,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 285.6) internal successors, (1428), 5 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:09:36,939 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:09:36,939 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:09:36,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-31 01:09:36,940 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:09:36,940 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:09:36,940 INFO L85 PathProgramCache]: Analyzing trace with hash 1234754154, now seen corresponding path program 5 times [2023-08-31 01:09:36,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:09:36,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580656562] [2023-08-31 01:09:36,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:09:36,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:09:37,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:09:37,232 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-08-31 01:09:37,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:09:37,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580656562] [2023-08-31 01:09:37,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580656562] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:09:37,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:09:37,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-31 01:09:37,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456360850] [2023-08-31 01:09:37,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:09:37,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 01:09:37,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:09:37,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 01:09:37,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-31 01:09:37,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 279 out of 661 [2023-08-31 01:09:37,273 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 76 transitions, 590 flow. Second operand has 5 states, 5 states have (on average 284.6) internal successors, (1423), 5 states have internal predecessors, (1423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:09:37,273 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:09:37,273 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 279 of 661 [2023-08-31 01:09:37,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:09:37,779 INFO L130 PetriNetUnfolder]: 1982/2860 cut-off events. [2023-08-31 01:09:37,779 INFO L131 PetriNetUnfolder]: For 9015/9015 co-relation queries the response was YES. [2023-08-31 01:09:37,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10869 conditions, 2860 events. 1982/2860 cut-off events. For 9015/9015 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 12057 event pairs, 587 based on Foata normal form. 36/2896 useless extension candidates. Maximal degree in co-relation 10758. Up to 1481 conditions per place. [2023-08-31 01:09:37,800 INFO L137 encePairwiseOnDemand]: 655/661 looper letters, 113 selfloop transitions, 20 changer transitions 2/135 dead transitions. [2023-08-31 01:09:37,800 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 135 transitions, 1110 flow [2023-08-31 01:09:37,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 01:09:37,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 01:09:37,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1757 transitions. [2023-08-31 01:09:37,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44301563287947554 [2023-08-31 01:09:37,805 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1757 transitions. [2023-08-31 01:09:37,805 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1757 transitions. [2023-08-31 01:09:37,806 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:09:37,806 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1757 transitions. [2023-08-31 01:09:37,809 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 292.8333333333333) internal successors, (1757), 6 states have internal predecessors, (1757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:09:37,813 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 661.0) internal successors, (4627), 7 states have internal predecessors, (4627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:09:37,814 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 661.0) internal successors, (4627), 7 states have internal predecessors, (4627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:09:37,814 INFO L175 Difference]: Start difference. First operand has 74 places, 76 transitions, 590 flow. Second operand 6 states and 1757 transitions. [2023-08-31 01:09:37,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 135 transitions, 1110 flow [2023-08-31 01:09:37,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 135 transitions, 1091 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-08-31 01:09:37,846 INFO L231 Difference]: Finished difference. Result has 79 places, 80 transitions, 659 flow [2023-08-31 01:09:37,847 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=661, PETRI_DIFFERENCE_MINUEND_FLOW=571, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=659, PETRI_PLACES=79, PETRI_TRANSITIONS=80} [2023-08-31 01:09:37,847 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 45 predicate places. [2023-08-31 01:09:37,847 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 80 transitions, 659 flow [2023-08-31 01:09:37,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 284.6) internal successors, (1423), 5 states have internal predecessors, (1423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:09:37,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:09:37,848 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:09:37,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-31 01:09:37,849 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:09:37,850 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:09:37,850 INFO L85 PathProgramCache]: Analyzing trace with hash -960619028, now seen corresponding path program 6 times [2023-08-31 01:09:37,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:09:37,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420692068] [2023-08-31 01:09:37,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:09:37,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:09:37,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:09:38,084 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-08-31 01:09:38,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:09:38,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420692068] [2023-08-31 01:09:38,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420692068] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:09:38,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:09:38,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-31 01:09:38,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905797673] [2023-08-31 01:09:38,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:09:38,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 01:09:38,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:09:38,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 01:09:38,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-31 01:09:38,133 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 279 out of 661 [2023-08-31 01:09:38,135 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 80 transitions, 659 flow. Second operand has 5 states, 5 states have (on average 284.6) internal successors, (1423), 5 states have internal predecessors, (1423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:09:38,135 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:09:38,135 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 279 of 661 [2023-08-31 01:09:38,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:09:38,661 INFO L130 PetriNetUnfolder]: 1978/2850 cut-off events. [2023-08-31 01:09:38,661 INFO L131 PetriNetUnfolder]: For 10685/10685 co-relation queries the response was YES. [2023-08-31 01:09:38,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11612 conditions, 2850 events. 1978/2850 cut-off events. For 10685/10685 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 11901 event pairs, 669 based on Foata normal form. 36/2886 useless extension candidates. Maximal degree in co-relation 11499. Up to 1666 conditions per place. [2023-08-31 01:09:38,677 INFO L137 encePairwiseOnDemand]: 655/661 looper letters, 110 selfloop transitions, 16 changer transitions 5/131 dead transitions. [2023-08-31 01:09:38,677 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 131 transitions, 1155 flow [2023-08-31 01:09:38,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 01:09:38,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 01:09:38,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1752 transitions. [2023-08-31 01:09:38,682 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44175491679273826 [2023-08-31 01:09:38,683 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1752 transitions. [2023-08-31 01:09:38,683 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1752 transitions. [2023-08-31 01:09:38,684 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:09:38,684 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1752 transitions. [2023-08-31 01:09:38,687 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 292.0) internal successors, (1752), 6 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:09:38,691 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 661.0) internal successors, (4627), 7 states have internal predecessors, (4627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:09:38,692 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 661.0) internal successors, (4627), 7 states have internal predecessors, (4627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:09:38,692 INFO L175 Difference]: Start difference. First operand has 79 places, 80 transitions, 659 flow. Second operand 6 states and 1752 transitions. [2023-08-31 01:09:38,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 131 transitions, 1155 flow [2023-08-31 01:09:38,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 131 transitions, 1135 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-31 01:09:38,735 INFO L231 Difference]: Finished difference. Result has 83 places, 80 transitions, 675 flow [2023-08-31 01:09:38,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=661, PETRI_DIFFERENCE_MINUEND_FLOW=640, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=675, PETRI_PLACES=83, PETRI_TRANSITIONS=80} [2023-08-31 01:09:38,736 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 49 predicate places. [2023-08-31 01:09:38,736 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 80 transitions, 675 flow [2023-08-31 01:09:38,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 284.6) internal successors, (1423), 5 states have internal predecessors, (1423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:09:38,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:09:38,737 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:09:38,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-31 01:09:38,739 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:09:38,739 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:09:38,739 INFO L85 PathProgramCache]: Analyzing trace with hash -1450948268, now seen corresponding path program 1 times [2023-08-31 01:09:38,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:09:38,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179602175] [2023-08-31 01:09:38,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:09:38,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:09:38,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:09:41,456 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:09:41,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:09:41,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179602175] [2023-08-31 01:09:41,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179602175] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:09:41,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243260261] [2023-08-31 01:09:41,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:09:41,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:09:41,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:09:41,458 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:09:41,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-31 01:09:41,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:09:41,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 58 conjunts are in the unsatisfiable core [2023-08-31 01:09:41,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:09:42,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 01:09:42,018 INFO L350 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 14 treesize of output 16 [2023-08-31 01:09:42,414 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:09:42,415 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 40 [2023-08-31 01:09:42,551 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-31 01:09:42,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:09:43,547 INFO L321 Elim1Store]: treesize reduction 19, result has 84.3 percent of original size [2023-08-31 01:09:43,547 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 188 treesize of output 233 [2023-08-31 01:09:43,601 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:09:43,601 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 122 treesize of output 156 [2023-08-31 01:09:56,887 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-31 01:09:56,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243260261] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:09:56,888 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:09:56,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 16, 12] total 47 [2023-08-31 01:09:56,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450750573] [2023-08-31 01:09:56,888 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:09:56,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-08-31 01:09:56,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:09:56,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-08-31 01:09:56,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=2134, Unknown=29, NotChecked=0, Total=2352 [2023-08-31 01:09:59,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 661 [2023-08-31 01:09:59,827 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 80 transitions, 675 flow. Second operand has 49 states, 49 states have (on average 194.85714285714286) internal successors, (9548), 49 states have internal predecessors, (9548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:09:59,827 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:09:59,827 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 661 [2023-08-31 01:09:59,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:10:05,919 INFO L130 PetriNetUnfolder]: 5790/8410 cut-off events. [2023-08-31 01:10:05,920 INFO L131 PetriNetUnfolder]: For 30070/30070 co-relation queries the response was YES. [2023-08-31 01:10:05,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33259 conditions, 8410 events. 5790/8410 cut-off events. For 30070/30070 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 44922 event pairs, 435 based on Foata normal form. 3/8413 useless extension candidates. Maximal degree in co-relation 33144. Up to 2105 conditions per place. [2023-08-31 01:10:05,975 INFO L137 encePairwiseOnDemand]: 641/661 looper letters, 361 selfloop transitions, 190 changer transitions 28/579 dead transitions. [2023-08-31 01:10:05,976 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 579 transitions, 5132 flow [2023-08-31 01:10:05,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-08-31 01:10:05,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-08-31 01:10:05,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 7931 transitions. [2023-08-31 01:10:05,996 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3076535164281004 [2023-08-31 01:10:05,996 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 7931 transitions. [2023-08-31 01:10:05,996 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 7931 transitions. [2023-08-31 01:10:06,000 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:10:06,000 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 7931 transitions. [2023-08-31 01:10:06,014 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 203.35897435897436) internal successors, (7931), 39 states have internal predecessors, (7931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:10:06,041 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 661.0) internal successors, (26440), 40 states have internal predecessors, (26440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:10:06,049 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 661.0) internal successors, (26440), 40 states have internal predecessors, (26440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:10:06,049 INFO L175 Difference]: Start difference. First operand has 83 places, 80 transitions, 675 flow. Second operand 39 states and 7931 transitions. [2023-08-31 01:10:06,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 579 transitions, 5132 flow [2023-08-31 01:10:06,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 579 transitions, 4672 flow, removed 5 selfloop flow, removed 8 redundant places. [2023-08-31 01:10:06,207 INFO L231 Difference]: Finished difference. Result has 135 places, 274 transitions, 3074 flow [2023-08-31 01:10:06,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=661, PETRI_DIFFERENCE_MINUEND_FLOW=608, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=3074, PETRI_PLACES=135, PETRI_TRANSITIONS=274} [2023-08-31 01:10:06,207 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 101 predicate places. [2023-08-31 01:10:06,207 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 274 transitions, 3074 flow [2023-08-31 01:10:06,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 194.85714285714286) internal successors, (9548), 49 states have internal predecessors, (9548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:10:06,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:10:06,210 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:10:06,221 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-31 01:10:06,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:10:06,417 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:10:06,417 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:10:06,417 INFO L85 PathProgramCache]: Analyzing trace with hash -926238340, now seen corresponding path program 2 times [2023-08-31 01:10:06,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:10:06,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17622306] [2023-08-31 01:10:06,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:10:06,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:10:06,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:10:08,644 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:10:08,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:10:08,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17622306] [2023-08-31 01:10:08,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17622306] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:10:08,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190591542] [2023-08-31 01:10:08,644 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 01:10:08,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:10:08,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:10:08,649 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:10:08,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-31 01:10:08,849 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 01:10:08,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:10:08,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 52 conjunts are in the unsatisfiable core [2023-08-31 01:10:08,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:10:09,437 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:10:09,437 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 40 [2023-08-31 01:10:09,504 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-31 01:10:09,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:10:10,071 INFO L321 Elim1Store]: treesize reduction 32, result has 73.6 percent of original size [2023-08-31 01:10:10,071 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 102 [2023-08-31 01:10:10,179 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-31 01:10:10,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190591542] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:10:10,179 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:10:10,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 15, 10] total 44 [2023-08-31 01:10:10,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523188710] [2023-08-31 01:10:10,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:10:10,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-08-31 01:10:10,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:10:10,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-08-31 01:10:10,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=1742, Unknown=0, NotChecked=0, Total=1980 [2023-08-31 01:10:14,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 235 out of 661 [2023-08-31 01:10:14,299 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 274 transitions, 3074 flow. Second operand has 45 states, 45 states have (on average 237.0222222222222) internal successors, (10666), 45 states have internal predecessors, (10666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:10:14,299 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:10:14,299 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 235 of 661 [2023-08-31 01:10:14,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:10:18,208 INFO L130 PetriNetUnfolder]: 7422/10743 cut-off events. [2023-08-31 01:10:18,208 INFO L131 PetriNetUnfolder]: For 69629/69629 co-relation queries the response was YES. [2023-08-31 01:10:18,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56089 conditions, 10743 events. 7422/10743 cut-off events. For 69629/69629 co-relation queries the response was YES. Maximal size of possible extension queue 536. Compared 59319 event pairs, 1470 based on Foata normal form. 2/10745 useless extension candidates. Maximal degree in co-relation 55941. Up to 6321 conditions per place. [2023-08-31 01:10:18,290 INFO L137 encePairwiseOnDemand]: 642/661 looper letters, 264 selfloop transitions, 264 changer transitions 125/653 dead transitions. [2023-08-31 01:10:18,291 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 653 transitions, 7992 flow [2023-08-31 01:10:18,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-08-31 01:10:18,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-08-31 01:10:18,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 6808 transitions. [2023-08-31 01:10:18,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3678409336503134 [2023-08-31 01:10:18,304 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 6808 transitions. [2023-08-31 01:10:18,304 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 6808 transitions. [2023-08-31 01:10:18,306 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:10:18,307 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 6808 transitions. [2023-08-31 01:10:18,315 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 243.14285714285714) internal successors, (6808), 28 states have internal predecessors, (6808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:10:18,332 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 661.0) internal successors, (19169), 29 states have internal predecessors, (19169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:10:18,334 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 661.0) internal successors, (19169), 29 states have internal predecessors, (19169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:10:18,334 INFO L175 Difference]: Start difference. First operand has 135 places, 274 transitions, 3074 flow. Second operand 28 states and 6808 transitions. [2023-08-31 01:10:18,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 653 transitions, 7992 flow [2023-08-31 01:10:18,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 653 transitions, 7775 flow, removed 96 selfloop flow, removed 5 redundant places. [2023-08-31 01:10:18,773 INFO L231 Difference]: Finished difference. Result has 172 places, 406 transitions, 5443 flow [2023-08-31 01:10:18,774 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=661, PETRI_DIFFERENCE_MINUEND_FLOW=2941, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=5443, PETRI_PLACES=172, PETRI_TRANSITIONS=406} [2023-08-31 01:10:18,774 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 138 predicate places. [2023-08-31 01:10:18,774 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 406 transitions, 5443 flow [2023-08-31 01:10:18,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 237.0222222222222) internal successors, (10666), 45 states have internal predecessors, (10666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:10:18,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:10:18,776 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:10:18,789 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-31 01:10:18,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:10:18,986 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:10:18,986 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:10:18,986 INFO L85 PathProgramCache]: Analyzing trace with hash -958745844, now seen corresponding path program 3 times [2023-08-31 01:10:18,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:10:18,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683838041] [2023-08-31 01:10:18,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:10:18,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:10:19,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:10:20,273 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-31 01:10:20,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:10:20,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683838041] [2023-08-31 01:10:20,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683838041] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:10:20,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344669926] [2023-08-31 01:10:20,274 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 01:10:20,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:10:20,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:10:20,277 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:10:20,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-31 01:10:20,496 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-31 01:10:20,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:10:20,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 54 conjunts are in the unsatisfiable core [2023-08-31 01:10:20,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:10:20,956 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:10:20,956 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 40 [2023-08-31 01:10:20,983 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-31 01:10:20,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:10:21,561 INFO L321 Elim1Store]: treesize reduction 32, result has 73.6 percent of original size [2023-08-31 01:10:21,562 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 102 [2023-08-31 01:10:21,755 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-31 01:10:21,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344669926] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:10:21,756 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:10:21,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 10] total 30 [2023-08-31 01:10:21,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674832133] [2023-08-31 01:10:21,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:10:21,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-08-31 01:10:21,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:10:21,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-08-31 01:10:21,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2023-08-31 01:10:23,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 248 out of 661 [2023-08-31 01:10:23,982 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 406 transitions, 5443 flow. Second operand has 31 states, 31 states have (on average 250.2258064516129) internal successors, (7757), 31 states have internal predecessors, (7757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:10:23,982 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:10:23,982 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 248 of 661 [2023-08-31 01:10:23,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:10:27,698 INFO L130 PetriNetUnfolder]: 8638/12483 cut-off events. [2023-08-31 01:10:27,698 INFO L131 PetriNetUnfolder]: For 151315/151315 co-relation queries the response was YES. [2023-08-31 01:10:27,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85708 conditions, 12483 events. 8638/12483 cut-off events. For 151315/151315 co-relation queries the response was YES. Maximal size of possible extension queue 626. Compared 70202 event pairs, 1855 based on Foata normal form. 2/12485 useless extension candidates. Maximal degree in co-relation 85544. Up to 5896 conditions per place. [2023-08-31 01:10:27,799 INFO L137 encePairwiseOnDemand]: 646/661 looper letters, 364 selfloop transitions, 301 changer transitions 13/678 dead transitions. [2023-08-31 01:10:27,799 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 678 transitions, 9762 flow [2023-08-31 01:10:27,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-31 01:10:27,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-31 01:10:27,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 5176 transitions. [2023-08-31 01:10:27,811 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39152798789712556 [2023-08-31 01:10:27,812 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 5176 transitions. [2023-08-31 01:10:27,812 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 5176 transitions. [2023-08-31 01:10:27,813 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:10:27,813 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 5176 transitions. [2023-08-31 01:10:27,819 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 258.8) internal successors, (5176), 20 states have internal predecessors, (5176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:10:27,828 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 661.0) internal successors, (13881), 21 states have internal predecessors, (13881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:10:27,829 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 661.0) internal successors, (13881), 21 states have internal predecessors, (13881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:10:27,829 INFO L175 Difference]: Start difference. First operand has 172 places, 406 transitions, 5443 flow. Second operand 20 states and 5176 transitions. [2023-08-31 01:10:27,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 678 transitions, 9762 flow [2023-08-31 01:10:28,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 678 transitions, 9419 flow, removed 162 selfloop flow, removed 7 redundant places. [2023-08-31 01:10:28,855 INFO L231 Difference]: Finished difference. Result has 186 places, 487 transitions, 7084 flow [2023-08-31 01:10:28,855 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=661, PETRI_DIFFERENCE_MINUEND_FLOW=5172, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=221, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=7084, PETRI_PLACES=186, PETRI_TRANSITIONS=487} [2023-08-31 01:10:28,856 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 152 predicate places. [2023-08-31 01:10:28,856 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 487 transitions, 7084 flow [2023-08-31 01:10:28,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 250.2258064516129) internal successors, (7757), 31 states have internal predecessors, (7757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:10:28,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:10:28,857 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:10:28,863 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-31 01:10:29,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-31 01:10:29,058 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:10:29,058 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:10:29,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1719213602, now seen corresponding path program 4 times [2023-08-31 01:10:29,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:10:29,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020655704] [2023-08-31 01:10:29,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:10:29,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:10:29,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:10:30,390 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-31 01:10:30,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:10:30,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020655704] [2023-08-31 01:10:30,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020655704] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:10:30,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116533518] [2023-08-31 01:10:30,390 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 01:10:30,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:10:30,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:10:30,392 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:10:30,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-31 01:10:30,627 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 01:10:30,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:10:30,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 54 conjunts are in the unsatisfiable core [2023-08-31 01:10:30,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:10:30,938 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:10:30,938 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 40 [2023-08-31 01:10:31,014 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-31 01:10:31,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:10:31,535 INFO L321 Elim1Store]: treesize reduction 32, result has 73.6 percent of original size [2023-08-31 01:10:31,535 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 102 [2023-08-31 01:10:31,682 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-31 01:10:31,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116533518] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:10:31,683 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:10:31,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 10] total 32 [2023-08-31 01:10:31,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548119969] [2023-08-31 01:10:31,683 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:10:31,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-31 01:10:31,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:10:31,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-31 01:10:31,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=933, Unknown=0, NotChecked=0, Total=1056 [2023-08-31 01:10:33,913 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 248 out of 661 [2023-08-31 01:10:33,917 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 487 transitions, 7084 flow. Second operand has 33 states, 33 states have (on average 250.24242424242425) internal successors, (8258), 33 states have internal predecessors, (8258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:10:33,917 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:10:33,917 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 248 of 661 [2023-08-31 01:10:33,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:10:38,497 INFO L130 PetriNetUnfolder]: 10045/14543 cut-off events. [2023-08-31 01:10:38,497 INFO L131 PetriNetUnfolder]: For 200844/200844 co-relation queries the response was YES. [2023-08-31 01:10:38,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104686 conditions, 14543 events. 10045/14543 cut-off events. For 200844/200844 co-relation queries the response was YES. Maximal size of possible extension queue 773. Compared 84704 event pairs, 1848 based on Foata normal form. 1/14544 useless extension candidates. Maximal degree in co-relation 104524. Up to 6180 conditions per place. [2023-08-31 01:10:38,640 INFO L137 encePairwiseOnDemand]: 646/661 looper letters, 392 selfloop transitions, 483 changer transitions 20/895 dead transitions. [2023-08-31 01:10:38,641 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 895 transitions, 13581 flow [2023-08-31 01:10:38,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-08-31 01:10:38,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-08-31 01:10:38,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 7489 transitions. [2023-08-31 01:10:38,650 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3906828733893265 [2023-08-31 01:10:38,651 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 7489 transitions. [2023-08-31 01:10:38,651 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 7489 transitions. [2023-08-31 01:10:38,654 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:10:38,654 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 7489 transitions. [2023-08-31 01:10:38,664 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 258.2413793103448) internal successors, (7489), 29 states have internal predecessors, (7489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:10:38,678 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 661.0) internal successors, (19830), 30 states have internal predecessors, (19830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:10:38,680 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 661.0) internal successors, (19830), 30 states have internal predecessors, (19830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:10:38,681 INFO L175 Difference]: Start difference. First operand has 186 places, 487 transitions, 7084 flow. Second operand 29 states and 7489 transitions. [2023-08-31 01:10:38,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 895 transitions, 13581 flow [2023-08-31 01:10:40,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 895 transitions, 13303 flow, removed 17 selfloop flow, removed 8 redundant places. [2023-08-31 01:10:40,173 INFO L231 Difference]: Finished difference. Result has 218 places, 665 transitions, 10888 flow [2023-08-31 01:10:40,174 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=661, PETRI_DIFFERENCE_MINUEND_FLOW=6871, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=487, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=309, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=10888, PETRI_PLACES=218, PETRI_TRANSITIONS=665} [2023-08-31 01:10:40,174 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 184 predicate places. [2023-08-31 01:10:40,174 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 665 transitions, 10888 flow [2023-08-31 01:10:40,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 250.24242424242425) internal successors, (8258), 33 states have internal predecessors, (8258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:10:40,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:10:40,175 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:10:40,180 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-31 01:10:40,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-31 01:10:40,376 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:10:40,377 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:10:40,377 INFO L85 PathProgramCache]: Analyzing trace with hash 88049456, now seen corresponding path program 5 times [2023-08-31 01:10:40,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:10:40,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713534760] [2023-08-31 01:10:40,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:10:40,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:10:40,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:10:41,489 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-31 01:10:41,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:10:41,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713534760] [2023-08-31 01:10:41,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713534760] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:10:41,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794298623] [2023-08-31 01:10:41,490 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 01:10:41,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:10:41,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:10:41,493 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:10:41,501 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-31 01:10:41,733 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-31 01:10:41,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:10:41,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 48 conjunts are in the unsatisfiable core [2023-08-31 01:10:41,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:10:42,022 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:10:42,022 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 48 [2023-08-31 01:10:42,048 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-31 01:10:42,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:10:46,526 INFO L321 Elim1Store]: treesize reduction 32, result has 73.6 percent of original size [2023-08-31 01:10:46,527 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 102 [2023-08-31 01:10:46,756 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-31 01:10:46,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794298623] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:10:46,757 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:10:46,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 10] total 34 [2023-08-31 01:10:46,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175135743] [2023-08-31 01:10:46,758 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:10:46,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-08-31 01:10:46,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:10:46,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-08-31 01:10:46,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1045, Unknown=1, NotChecked=0, Total=1190 [2023-08-31 01:10:49,026 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 01:10:51,245 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 01:10:53,625 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 01:10:56,175 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 01:10:58,369 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 01:11:00,434 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 01:11:01,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 242 out of 661 [2023-08-31 01:11:01,714 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 665 transitions, 10888 flow. Second operand has 35 states, 35 states have (on average 244.22857142857143) internal successors, (8548), 35 states have internal predecessors, (8548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:11:01,714 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:11:01,714 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 242 of 661 [2023-08-31 01:11:01,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:11:07,152 INFO L130 PetriNetUnfolder]: 11137/16109 cut-off events. [2023-08-31 01:11:07,152 INFO L131 PetriNetUnfolder]: For 270755/270755 co-relation queries the response was YES. [2023-08-31 01:11:07,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127209 conditions, 16109 events. 11137/16109 cut-off events. For 270755/270755 co-relation queries the response was YES. Maximal size of possible extension queue 882. Compared 95215 event pairs, 2162 based on Foata normal form. 1/16110 useless extension candidates. Maximal degree in co-relation 127035. Up to 6330 conditions per place. [2023-08-31 01:11:07,310 INFO L137 encePairwiseOnDemand]: 647/661 looper letters, 385 selfloop transitions, 505 changer transitions 13/903 dead transitions. [2023-08-31 01:11:07,311 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 903 transitions, 15449 flow [2023-08-31 01:11:07,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-31 01:11:07,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-31 01:11:07,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 5559 transitions. [2023-08-31 01:11:07,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38227203960940725 [2023-08-31 01:11:07,319 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 5559 transitions. [2023-08-31 01:11:07,319 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 5559 transitions. [2023-08-31 01:11:07,321 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:11:07,321 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 5559 transitions. [2023-08-31 01:11:07,328 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 252.6818181818182) internal successors, (5559), 22 states have internal predecessors, (5559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:11:07,338 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 661.0) internal successors, (15203), 23 states have internal predecessors, (15203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:11:07,339 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 661.0) internal successors, (15203), 23 states have internal predecessors, (15203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:11:07,340 INFO L175 Difference]: Start difference. First operand has 218 places, 665 transitions, 10888 flow. Second operand 22 states and 5559 transitions. [2023-08-31 01:11:07,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 903 transitions, 15449 flow [2023-08-31 01:11:10,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 903 transitions, 15195 flow, removed 73 selfloop flow, removed 10 redundant places. [2023-08-31 01:11:10,132 INFO L231 Difference]: Finished difference. Result has 236 places, 715 transitions, 12682 flow [2023-08-31 01:11:10,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=661, PETRI_DIFFERENCE_MINUEND_FLOW=10639, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=665, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=455, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=12682, PETRI_PLACES=236, PETRI_TRANSITIONS=715} [2023-08-31 01:11:10,133 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 202 predicate places. [2023-08-31 01:11:10,133 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 715 transitions, 12682 flow [2023-08-31 01:11:10,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 244.22857142857143) internal successors, (8548), 35 states have internal predecessors, (8548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:11:10,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:11:10,135 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:11:10,142 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-31 01:11:10,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-31 01:11:10,342 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:11:10,342 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:11:10,342 INFO L85 PathProgramCache]: Analyzing trace with hash 1841694086, now seen corresponding path program 6 times [2023-08-31 01:11:10,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:11:10,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393665750] [2023-08-31 01:11:10,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:11:10,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:11:10,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:11:11,524 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-31 01:11:11,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:11:11,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393665750] [2023-08-31 01:11:11,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393665750] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:11:11,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193984088] [2023-08-31 01:11:11,525 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 01:11:11,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:11:11,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:11:11,526 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:11:11,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-31 01:11:11,760 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-31 01:11:11,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:11:11,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 54 conjunts are in the unsatisfiable core [2023-08-31 01:11:11,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:11:12,057 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:11:12,057 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 40 [2023-08-31 01:11:12,086 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-31 01:11:12,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:11:12,529 INFO L321 Elim1Store]: treesize reduction 32, result has 73.6 percent of original size [2023-08-31 01:11:12,529 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 102 [2023-08-31 01:11:12,656 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-31 01:11:12,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193984088] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:11:12,656 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:11:12,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 10] total 28 [2023-08-31 01:11:12,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487959194] [2023-08-31 01:11:12,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:11:12,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-31 01:11:12,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:11:12,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-31 01:11:12,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2023-08-31 01:11:14,741 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 248 out of 661 [2023-08-31 01:11:14,745 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 715 transitions, 12682 flow. Second operand has 29 states, 29 states have (on average 250.24137931034483) internal successors, (7257), 29 states have internal predecessors, (7257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:11:14,745 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:11:14,745 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 248 of 661 [2023-08-31 01:11:14,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:11:19,907 INFO L130 PetriNetUnfolder]: 11255/16280 cut-off events. [2023-08-31 01:11:19,907 INFO L131 PetriNetUnfolder]: For 319224/319224 co-relation queries the response was YES. [2023-08-31 01:11:20,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135646 conditions, 16280 events. 11255/16280 cut-off events. For 319224/319224 co-relation queries the response was YES. Maximal size of possible extension queue 888. Compared 96359 event pairs, 2338 based on Foata normal form. 1/16281 useless extension candidates. Maximal degree in co-relation 135466. Up to 6819 conditions per place. [2023-08-31 01:11:20,106 INFO L137 encePairwiseOnDemand]: 647/661 looper letters, 406 selfloop transitions, 489 changer transitions 16/911 dead transitions. [2023-08-31 01:11:20,107 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 911 transitions, 16645 flow [2023-08-31 01:11:20,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-31 01:11:20,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-31 01:11:20,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 5690 transitions. [2023-08-31 01:11:20,114 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3912804291019117 [2023-08-31 01:11:20,114 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 5690 transitions. [2023-08-31 01:11:20,115 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 5690 transitions. [2023-08-31 01:11:20,116 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:11:20,117 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 5690 transitions. [2023-08-31 01:11:20,123 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 258.6363636363636) internal successors, (5690), 22 states have internal predecessors, (5690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:11:20,134 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 661.0) internal successors, (15203), 23 states have internal predecessors, (15203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:11:20,136 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 661.0) internal successors, (15203), 23 states have internal predecessors, (15203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:11:20,136 INFO L175 Difference]: Start difference. First operand has 236 places, 715 transitions, 12682 flow. Second operand 22 states and 5690 transitions. [2023-08-31 01:11:20,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 911 transitions, 16645 flow [2023-08-31 01:11:22,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 911 transitions, 16144 flow, removed 88 selfloop flow, removed 8 redundant places. [2023-08-31 01:11:22,838 INFO L231 Difference]: Finished difference. Result has 251 places, 719 transitions, 13282 flow [2023-08-31 01:11:22,839 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=661, PETRI_DIFFERENCE_MINUEND_FLOW=12213, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=715, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=485, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=13282, PETRI_PLACES=251, PETRI_TRANSITIONS=719} [2023-08-31 01:11:22,839 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 217 predicate places. [2023-08-31 01:11:22,840 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 719 transitions, 13282 flow [2023-08-31 01:11:22,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 250.24137931034483) internal successors, (7257), 29 states have internal predecessors, (7257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:11:22,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:11:22,841 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:11:22,846 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-31 01:11:23,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:11:23,047 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:11:23,047 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:11:23,047 INFO L85 PathProgramCache]: Analyzing trace with hash 1373405120, now seen corresponding path program 7 times [2023-08-31 01:11:23,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:11:23,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706652309] [2023-08-31 01:11:23,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:11:23,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:11:23,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:11:25,027 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 3 proven. 20 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-08-31 01:11:25,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:11:25,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706652309] [2023-08-31 01:11:25,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706652309] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:11:25,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581916573] [2023-08-31 01:11:25,027 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 01:11:25,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:11:25,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:11:25,029 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:11:25,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-31 01:11:25,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:11:25,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 54 conjunts are in the unsatisfiable core [2023-08-31 01:11:25,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:11:25,626 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:11:25,626 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 40 [2023-08-31 01:11:25,646 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-31 01:11:25,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:11:26,177 INFO L321 Elim1Store]: treesize reduction 32, result has 73.6 percent of original size [2023-08-31 01:11:26,178 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 102 [2023-08-31 01:11:26,306 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-31 01:11:26,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581916573] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:11:26,306 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:11:26,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 15, 10] total 40 [2023-08-31 01:11:26,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637965626] [2023-08-31 01:11:26,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:11:26,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-08-31 01:11:26,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:11:26,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-08-31 01:11:26,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1481, Unknown=0, NotChecked=0, Total=1640 [2023-08-31 01:11:30,158 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 235 out of 661 [2023-08-31 01:11:30,162 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 719 transitions, 13282 flow. Second operand has 41 states, 41 states have (on average 237.0487804878049) internal successors, (9719), 41 states have internal predecessors, (9719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:11:30,162 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:11:30,162 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 235 of 661 [2023-08-31 01:11:30,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:11:36,531 INFO L130 PetriNetUnfolder]: 11399/16498 cut-off events. [2023-08-31 01:11:36,531 INFO L131 PetriNetUnfolder]: For 336682/336682 co-relation queries the response was YES. [2023-08-31 01:11:36,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140447 conditions, 16498 events. 11399/16498 cut-off events. For 336682/336682 co-relation queries the response was YES. Maximal size of possible extension queue 895. Compared 97772 event pairs, 2738 based on Foata normal form. 2/16500 useless extension candidates. Maximal degree in co-relation 140265. Up to 7500 conditions per place. [2023-08-31 01:11:36,697 INFO L137 encePairwiseOnDemand]: 642/661 looper letters, 421 selfloop transitions, 457 changer transitions 11/889 dead transitions. [2023-08-31 01:11:36,697 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 889 transitions, 16963 flow [2023-08-31 01:11:36,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-31 01:11:36,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-31 01:11:36,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 6080 transitions. [2023-08-31 01:11:36,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3679273827534039 [2023-08-31 01:11:36,705 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 6080 transitions. [2023-08-31 01:11:36,705 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 6080 transitions. [2023-08-31 01:11:36,707 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:11:36,707 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 6080 transitions. [2023-08-31 01:11:36,715 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 243.2) internal successors, (6080), 25 states have internal predecessors, (6080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:11:36,728 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 661.0) internal successors, (17186), 26 states have internal predecessors, (17186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:11:36,730 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 661.0) internal successors, (17186), 26 states have internal predecessors, (17186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:11:36,730 INFO L175 Difference]: Start difference. First operand has 251 places, 719 transitions, 13282 flow. Second operand 25 states and 6080 transitions. [2023-08-31 01:11:36,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 889 transitions, 16963 flow [2023-08-31 01:11:39,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 889 transitions, 16035 flow, removed 48 selfloop flow, removed 16 redundant places. [2023-08-31 01:11:39,539 INFO L231 Difference]: Finished difference. Result has 261 places, 725 transitions, 13504 flow [2023-08-31 01:11:39,540 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=661, PETRI_DIFFERENCE_MINUEND_FLOW=12392, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=719, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=451, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=13504, PETRI_PLACES=261, PETRI_TRANSITIONS=725} [2023-08-31 01:11:39,540 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 227 predicate places. [2023-08-31 01:11:39,540 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 725 transitions, 13504 flow [2023-08-31 01:11:39,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 237.0487804878049) internal successors, (9719), 41 states have internal predecessors, (9719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:11:39,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:11:39,542 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:11:39,547 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-31 01:11:39,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:11:39,742 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:11:39,743 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:11:39,743 INFO L85 PathProgramCache]: Analyzing trace with hash 2083753392, now seen corresponding path program 8 times [2023-08-31 01:11:39,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:11:39,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73567896] [2023-08-31 01:11:39,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:11:39,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:11:39,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:11:40,675 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-31 01:11:40,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:11:40,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73567896] [2023-08-31 01:11:40,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73567896] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:11:40,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122874006] [2023-08-31 01:11:40,676 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 01:11:40,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:11:40,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:11:40,677 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:11:40,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-31 01:11:40,915 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 01:11:40,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:11:40,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 54 conjunts are in the unsatisfiable core [2023-08-31 01:11:40,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:11:41,273 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:11:41,274 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 40 [2023-08-31 01:11:41,301 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-31 01:11:41,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:11:41,742 INFO L321 Elim1Store]: treesize reduction 8, result has 96.1 percent of original size [2023-08-31 01:11:41,743 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 56 treesize of output 212 [2023-08-31 01:11:50,999 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-31 01:11:51,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122874006] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:11:51,000 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:11:51,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 10] total 30 [2023-08-31 01:11:51,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936453184] [2023-08-31 01:11:51,000 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:11:51,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-08-31 01:11:51,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:11:51,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-08-31 01:11:51,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=822, Unknown=0, NotChecked=0, Total=930 [2023-08-31 01:11:53,114 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 248 out of 661 [2023-08-31 01:11:53,116 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 725 transitions, 13504 flow. Second operand has 31 states, 31 states have (on average 250.16129032258064) internal successors, (7755), 31 states have internal predecessors, (7755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:11:53,117 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:11:53,117 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 248 of 661 [2023-08-31 01:11:53,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:12:00,709 INFO L130 PetriNetUnfolder]: 15008/21628 cut-off events. [2023-08-31 01:12:00,709 INFO L131 PetriNetUnfolder]: For 474583/474583 co-relation queries the response was YES. [2023-08-31 01:12:00,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 186612 conditions, 21628 events. 15008/21628 cut-off events. For 474583/474583 co-relation queries the response was YES. Maximal size of possible extension queue 1163. Compared 132315 event pairs, 2346 based on Foata normal form. 1/21629 useless extension candidates. Maximal degree in co-relation 186418. Up to 10523 conditions per place. [2023-08-31 01:12:00,973 INFO L137 encePairwiseOnDemand]: 649/661 looper letters, 442 selfloop transitions, 604 changer transitions 125/1171 dead transitions. [2023-08-31 01:12:00,973 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 1171 transitions, 21989 flow [2023-08-31 01:12:00,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-08-31 01:12:00,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-08-31 01:12:00,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 7227 transitions. [2023-08-31 01:12:00,979 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3904797925221526 [2023-08-31 01:12:00,979 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 7227 transitions. [2023-08-31 01:12:00,979 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 7227 transitions. [2023-08-31 01:12:00,981 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:12:00,981 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 7227 transitions. [2023-08-31 01:12:00,999 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 258.10714285714283) internal successors, (7227), 28 states have internal predecessors, (7227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:12:01,018 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 661.0) internal successors, (19169), 29 states have internal predecessors, (19169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:12:01,020 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 661.0) internal successors, (19169), 29 states have internal predecessors, (19169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:12:01,020 INFO L175 Difference]: Start difference. First operand has 261 places, 725 transitions, 13504 flow. Second operand 28 states and 7227 transitions. [2023-08-31 01:12:01,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 1171 transitions, 21989 flow [2023-08-31 01:12:05,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 1171 transitions, 21033 flow, removed 40 selfloop flow, removed 17 redundant places. [2023-08-31 01:12:05,399 INFO L231 Difference]: Finished difference. Result has 289 places, 866 transitions, 17235 flow [2023-08-31 01:12:05,400 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=661, PETRI_DIFFERENCE_MINUEND_FLOW=12674, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=725, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=491, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=17235, PETRI_PLACES=289, PETRI_TRANSITIONS=866} [2023-08-31 01:12:05,400 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 255 predicate places. [2023-08-31 01:12:05,400 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 866 transitions, 17235 flow [2023-08-31 01:12:05,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 250.16129032258064) internal successors, (7755), 31 states have internal predecessors, (7755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:12:05,401 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:12:05,401 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:12:05,406 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-31 01:12:05,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-08-31 01:12:05,602 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:12:05,602 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:12:05,602 INFO L85 PathProgramCache]: Analyzing trace with hash 1152200182, now seen corresponding path program 9 times [2023-08-31 01:12:05,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:12:05,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404911638] [2023-08-31 01:12:05,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:12:05,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:12:05,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:12:06,620 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-31 01:12:06,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:12:06,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404911638] [2023-08-31 01:12:06,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404911638] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:12:06,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940855604] [2023-08-31 01:12:06,620 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 01:12:06,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:12:06,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:12:06,624 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:12:06,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-31 01:12:06,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-31 01:12:06,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:12:06,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 54 conjunts are in the unsatisfiable core [2023-08-31 01:12:06,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:12:07,135 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:12:07,135 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 40 [2023-08-31 01:12:07,149 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-31 01:12:07,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:12:07,603 INFO L321 Elim1Store]: treesize reduction 32, result has 73.6 percent of original size [2023-08-31 01:12:07,604 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 102 [2023-08-31 01:12:07,716 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-31 01:12:07,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940855604] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:12:07,717 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:12:07,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 10] total 29 [2023-08-31 01:12:07,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384751233] [2023-08-31 01:12:07,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:12:07,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-31 01:12:07,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:12:07,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-31 01:12:07,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=766, Unknown=0, NotChecked=0, Total=870 [2023-08-31 01:12:09,948 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 248 out of 661 [2023-08-31 01:12:09,951 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 866 transitions, 17235 flow. Second operand has 30 states, 30 states have (on average 250.33333333333334) internal successors, (7510), 30 states have internal predecessors, (7510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:12:09,952 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:12:09,952 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 248 of 661 [2023-08-31 01:12:09,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:12:16,887 INFO L130 PetriNetUnfolder]: 13257/19159 cut-off events. [2023-08-31 01:12:16,888 INFO L131 PetriNetUnfolder]: For 715015/715015 co-relation queries the response was YES. [2023-08-31 01:12:17,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 194977 conditions, 19159 events. 13257/19159 cut-off events. For 715015/715015 co-relation queries the response was YES. Maximal size of possible extension queue 1049. Compared 116389 event pairs, 2427 based on Foata normal form. 1/19160 useless extension candidates. Maximal degree in co-relation 194780. Up to 7040 conditions per place. [2023-08-31 01:12:17,156 INFO L137 encePairwiseOnDemand]: 647/661 looper letters, 510 selfloop transitions, 558 changer transitions 39/1107 dead transitions. [2023-08-31 01:12:17,156 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 1107 transitions, 22947 flow [2023-08-31 01:12:17,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-31 01:12:17,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-31 01:12:17,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 5937 transitions. [2023-08-31 01:12:17,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3905150299283036 [2023-08-31 01:12:17,162 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 5937 transitions. [2023-08-31 01:12:17,162 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 5937 transitions. [2023-08-31 01:12:17,163 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:12:17,164 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 5937 transitions. [2023-08-31 01:12:17,172 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 258.1304347826087) internal successors, (5937), 23 states have internal predecessors, (5937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:12:17,183 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 661.0) internal successors, (15864), 24 states have internal predecessors, (15864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:12:17,185 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 661.0) internal successors, (15864), 24 states have internal predecessors, (15864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:12:17,185 INFO L175 Difference]: Start difference. First operand has 289 places, 866 transitions, 17235 flow. Second operand 23 states and 5937 transitions. [2023-08-31 01:12:17,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 1107 transitions, 22947 flow [2023-08-31 01:12:24,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 1107 transitions, 21907 flow, removed 336 selfloop flow, removed 6 redundant places. [2023-08-31 01:12:24,531 INFO L231 Difference]: Finished difference. Result has 311 places, 885 transitions, 18054 flow [2023-08-31 01:12:24,531 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=661, PETRI_DIFFERENCE_MINUEND_FLOW=16322, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=866, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=542, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=18054, PETRI_PLACES=311, PETRI_TRANSITIONS=885} [2023-08-31 01:12:24,532 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 277 predicate places. [2023-08-31 01:12:24,532 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 885 transitions, 18054 flow [2023-08-31 01:12:24,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 250.33333333333334) internal successors, (7510), 30 states have internal predecessors, (7510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:12:24,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:12:24,533 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:12:24,538 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-31 01:12:24,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:12:24,734 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:12:24,734 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:12:24,734 INFO L85 PathProgramCache]: Analyzing trace with hash -200624508, now seen corresponding path program 10 times [2023-08-31 01:12:24,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:12:24,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664517831] [2023-08-31 01:12:24,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:12:24,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:12:24,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:12:25,745 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-31 01:12:25,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:12:25,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664517831] [2023-08-31 01:12:25,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664517831] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:12:25,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273290333] [2023-08-31 01:12:25,745 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 01:12:25,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:12:25,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:12:25,747 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:12:25,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-31 01:12:25,944 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 01:12:25,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:12:25,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 54 conjunts are in the unsatisfiable core [2023-08-31 01:12:25,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:12:26,163 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:12:26,163 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 40 [2023-08-31 01:12:26,185 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-31 01:12:26,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:12:26,636 INFO L321 Elim1Store]: treesize reduction 32, result has 73.6 percent of original size [2023-08-31 01:12:26,636 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 102 [2023-08-31 01:12:26,746 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-31 01:12:26,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273290333] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:12:26,746 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:12:26,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 10] total 28 [2023-08-31 01:12:26,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327138056] [2023-08-31 01:12:26,746 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:12:26,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-31 01:12:26,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:12:26,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-31 01:12:26,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2023-08-31 01:12:29,468 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 248 out of 661 [2023-08-31 01:12:29,471 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 885 transitions, 18054 flow. Second operand has 29 states, 29 states have (on average 250.24137931034483) internal successors, (7257), 29 states have internal predecessors, (7257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:12:29,471 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:12:29,471 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 248 of 661 [2023-08-31 01:12:29,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:12:36,314 INFO L130 PetriNetUnfolder]: 13067/18881 cut-off events. [2023-08-31 01:12:36,315 INFO L131 PetriNetUnfolder]: For 780868/780868 co-relation queries the response was YES. [2023-08-31 01:12:36,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 194700 conditions, 18881 events. 13067/18881 cut-off events. For 780868/780868 co-relation queries the response was YES. Maximal size of possible extension queue 1002. Compared 114040 event pairs, 2598 based on Foata normal form. 1/18882 useless extension candidates. Maximal degree in co-relation 194496. Up to 7258 conditions per place. [2023-08-31 01:12:36,551 INFO L137 encePairwiseOnDemand]: 647/661 looper letters, 527 selfloop transitions, 547 changer transitions 1/1075 dead transitions. [2023-08-31 01:12:36,551 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 1075 transitions, 22536 flow [2023-08-31 01:12:36,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-31 01:12:36,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-31 01:12:36,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 5677 transitions. [2023-08-31 01:12:36,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39038646678586164 [2023-08-31 01:12:36,555 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 5677 transitions. [2023-08-31 01:12:36,555 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 5677 transitions. [2023-08-31 01:12:36,555 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:12:36,556 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 5677 transitions. [2023-08-31 01:12:36,561 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 258.04545454545456) internal successors, (5677), 22 states have internal predecessors, (5677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:12:36,570 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 661.0) internal successors, (15203), 23 states have internal predecessors, (15203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:12:36,571 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 661.0) internal successors, (15203), 23 states have internal predecessors, (15203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:12:36,571 INFO L175 Difference]: Start difference. First operand has 311 places, 885 transitions, 18054 flow. Second operand 22 states and 5677 transitions. [2023-08-31 01:12:36,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 1075 transitions, 22536 flow [2023-08-31 01:12:42,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 1075 transitions, 21393 flow, removed 96 selfloop flow, removed 15 redundant places. [2023-08-31 01:12:42,564 INFO L231 Difference]: Finished difference. Result has 317 places, 889 transitions, 18139 flow [2023-08-31 01:12:42,564 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=661, PETRI_DIFFERENCE_MINUEND_FLOW=16938, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=885, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=543, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=339, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=18139, PETRI_PLACES=317, PETRI_TRANSITIONS=889} [2023-08-31 01:12:42,565 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 283 predicate places. [2023-08-31 01:12:42,565 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 889 transitions, 18139 flow [2023-08-31 01:12:42,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 250.24137931034483) internal successors, (7257), 29 states have internal predecessors, (7257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:12:42,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:12:42,566 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:12:42,571 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-08-31 01:12:42,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:12:42,777 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:12:42,778 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:12:42,778 INFO L85 PathProgramCache]: Analyzing trace with hash 512198078, now seen corresponding path program 11 times [2023-08-31 01:12:42,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:12:42,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244610396] [2023-08-31 01:12:42,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:12:42,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:12:42,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:12:43,797 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-31 01:12:43,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:12:43,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244610396] [2023-08-31 01:12:43,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244610396] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:12:43,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464236581] [2023-08-31 01:12:43,798 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 01:12:43,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:12:43,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:12:43,799 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:12:43,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-31 01:12:44,072 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-31 01:12:44,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:12:44,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 54 conjunts are in the unsatisfiable core [2023-08-31 01:12:44,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:12:44,381 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:12:44,382 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 40 [2023-08-31 01:12:44,399 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-31 01:12:44,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:12:44,804 INFO L321 Elim1Store]: treesize reduction 32, result has 73.6 percent of original size [2023-08-31 01:12:44,805 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 102 [2023-08-31 01:12:44,932 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-31 01:12:44,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464236581] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:12:44,933 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:12:44,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 10] total 30 [2023-08-31 01:12:44,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530585479] [2023-08-31 01:12:44,933 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:12:44,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-08-31 01:12:44,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:12:44,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-08-31 01:12:44,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=822, Unknown=0, NotChecked=0, Total=930 [2023-08-31 01:12:47,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 248 out of 661 [2023-08-31 01:12:47,376 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 889 transitions, 18139 flow. Second operand has 31 states, 31 states have (on average 250.2258064516129) internal successors, (7757), 31 states have internal predecessors, (7757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:12:47,376 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:12:47,376 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 248 of 661 [2023-08-31 01:12:47,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:12:55,294 INFO L130 PetriNetUnfolder]: 13611/19666 cut-off events. [2023-08-31 01:12:55,294 INFO L131 PetriNetUnfolder]: For 824202/824202 co-relation queries the response was YES. [2023-08-31 01:12:55,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 203844 conditions, 19666 events. 13611/19666 cut-off events. For 824202/824202 co-relation queries the response was YES. Maximal size of possible extension queue 1038. Compared 119346 event pairs, 1960 based on Foata normal form. 1/19667 useless extension candidates. Maximal degree in co-relation 203639. Up to 6668 conditions per place. [2023-08-31 01:12:55,596 INFO L137 encePairwiseOnDemand]: 647/661 looper letters, 506 selfloop transitions, 638 changer transitions 31/1175 dead transitions. [2023-08-31 01:12:55,597 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 1175 transitions, 24593 flow [2023-08-31 01:12:55,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-08-31 01:12:55,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-08-31 01:12:55,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 8250 transitions. [2023-08-31 01:12:55,604 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3900340393343419 [2023-08-31 01:12:55,604 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 8250 transitions. [2023-08-31 01:12:55,604 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 8250 transitions. [2023-08-31 01:12:55,605 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:12:55,605 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 8250 transitions. [2023-08-31 01:12:55,610 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 257.8125) internal successors, (8250), 32 states have internal predecessors, (8250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:12:55,619 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 661.0) internal successors, (21813), 33 states have internal predecessors, (21813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:12:55,621 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 661.0) internal successors, (21813), 33 states have internal predecessors, (21813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:12:55,622 INFO L175 Difference]: Start difference. First operand has 317 places, 889 transitions, 18139 flow. Second operand 32 states and 8250 transitions. [2023-08-31 01:12:55,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 1175 transitions, 24593 flow [2023-08-31 01:13:01,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 1175 transitions, 23450 flow, removed 64 selfloop flow, removed 19 redundant places. [2023-08-31 01:13:01,845 INFO L231 Difference]: Finished difference. Result has 339 places, 918 transitions, 19231 flow [2023-08-31 01:13:01,846 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=661, PETRI_DIFFERENCE_MINUEND_FLOW=17119, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=889, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=610, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=19231, PETRI_PLACES=339, PETRI_TRANSITIONS=918} [2023-08-31 01:13:01,847 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 305 predicate places. [2023-08-31 01:13:01,847 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 918 transitions, 19231 flow [2023-08-31 01:13:01,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 250.2258064516129) internal successors, (7757), 31 states have internal predecessors, (7757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:13:01,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:13:01,849 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:13:01,855 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-31 01:13:02,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-08-31 01:13:02,055 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:13:02,055 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:13:02,055 INFO L85 PathProgramCache]: Analyzing trace with hash -940151146, now seen corresponding path program 12 times [2023-08-31 01:13:02,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:13:02,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649563226] [2023-08-31 01:13:02,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:13:02,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:13:02,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:13:03,008 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-31 01:13:03,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:13:03,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649563226] [2023-08-31 01:13:03,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649563226] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:13:03,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636705490] [2023-08-31 01:13:03,009 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 01:13:03,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:13:03,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:13:03,010 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:13:03,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-31 01:13:03,326 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-31 01:13:03,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:13:03,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 56 conjunts are in the unsatisfiable core [2023-08-31 01:13:03,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:13:03,625 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:13:03,626 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 40 [2023-08-31 01:13:03,753 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-31 01:13:03,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:13:04,286 INFO L321 Elim1Store]: treesize reduction 36, result has 70.2 percent of original size [2023-08-31 01:13:04,286 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 48 treesize of output 100 [2023-08-31 01:13:04,379 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-31 01:13:04,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636705490] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:13:04,379 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:13:04,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 10] total 31 [2023-08-31 01:13:04,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73787798] [2023-08-31 01:13:04,380 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:13:04,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-31 01:13:04,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:13:04,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-31 01:13:04,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=876, Unknown=0, NotChecked=0, Total=992 [2023-08-31 01:13:06,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 245 out of 661 [2023-08-31 01:13:06,616 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 918 transitions, 19231 flow. Second operand has 32 states, 32 states have (on average 247.21875) internal successors, (7911), 32 states have internal predecessors, (7911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:13:06,616 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:13:06,616 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 245 of 661 [2023-08-31 01:13:06,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:13:14,976 INFO L130 PetriNetUnfolder]: 13874/20059 cut-off events. [2023-08-31 01:13:14,976 INFO L131 PetriNetUnfolder]: For 982859/982859 co-relation queries the response was YES. [2023-08-31 01:13:15,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 215977 conditions, 20059 events. 13874/20059 cut-off events. For 982859/982859 co-relation queries the response was YES. Maximal size of possible extension queue 1033. Compared 121907 event pairs, 2643 based on Foata normal form. 2/20061 useless extension candidates. Maximal degree in co-relation 215765. Up to 7046 conditions per place. [2023-08-31 01:13:15,215 INFO L137 encePairwiseOnDemand]: 644/661 looper letters, 569 selfloop transitions, 622 changer transitions 5/1196 dead transitions. [2023-08-31 01:13:15,215 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 1196 transitions, 25309 flow [2023-08-31 01:13:15,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-08-31 01:13:15,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-08-31 01:13:15,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 8413 transitions. [2023-08-31 01:13:15,223 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3856874340989318 [2023-08-31 01:13:15,223 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 8413 transitions. [2023-08-31 01:13:15,224 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 8413 transitions. [2023-08-31 01:13:15,225 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:13:15,225 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 8413 transitions. [2023-08-31 01:13:15,232 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 254.93939393939394) internal successors, (8413), 33 states have internal predecessors, (8413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:13:15,246 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 661.0) internal successors, (22474), 34 states have internal predecessors, (22474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:13:15,248 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 661.0) internal successors, (22474), 34 states have internal predecessors, (22474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:13:15,249 INFO L175 Difference]: Start difference. First operand has 339 places, 918 transitions, 19231 flow. Second operand 33 states and 8413 transitions. [2023-08-31 01:13:15,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 1196 transitions, 25309 flow [2023-08-31 01:13:22,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 1196 transitions, 24269 flow, removed 136 selfloop flow, removed 20 redundant places. [2023-08-31 01:13:22,797 INFO L231 Difference]: Finished difference. Result has 358 places, 961 transitions, 20837 flow [2023-08-31 01:13:22,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=661, PETRI_DIFFERENCE_MINUEND_FLOW=18255, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=918, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=584, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=20837, PETRI_PLACES=358, PETRI_TRANSITIONS=961} [2023-08-31 01:13:22,798 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 324 predicate places. [2023-08-31 01:13:22,798 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 961 transitions, 20837 flow [2023-08-31 01:13:22,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 247.21875) internal successors, (7911), 32 states have internal predecessors, (7911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:13:22,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:13:22,800 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:13:22,808 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-31 01:13:23,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:13:23,009 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:13:23,009 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:13:23,009 INFO L85 PathProgramCache]: Analyzing trace with hash -1811565466, now seen corresponding path program 13 times [2023-08-31 01:13:23,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:13:23,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666136333] [2023-08-31 01:13:23,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:13:23,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:13:23,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:13:23,800 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-31 01:13:23,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:13:23,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666136333] [2023-08-31 01:13:23,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666136333] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:13:23,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895927494] [2023-08-31 01:13:23,800 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 01:13:23,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:13:23,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:13:23,805 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:13:23,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-31 01:13:24,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:13:24,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 54 conjunts are in the unsatisfiable core [2023-08-31 01:13:24,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:13:24,261 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:13:24,262 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 40 [2023-08-31 01:13:24,288 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-31 01:13:24,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:13:24,711 INFO L321 Elim1Store]: treesize reduction 32, result has 73.6 percent of original size [2023-08-31 01:13:24,711 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 102 [2023-08-31 01:13:24,816 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-31 01:13:24,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895927494] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:13:24,816 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:13:24,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 10] total 28 [2023-08-31 01:13:24,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85032342] [2023-08-31 01:13:24,817 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:13:24,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-31 01:13:24,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:13:24,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-31 01:13:24,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2023-08-31 01:13:26,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 248 out of 661 [2023-08-31 01:13:26,786 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 961 transitions, 20837 flow. Second operand has 29 states, 29 states have (on average 250.24137931034483) internal successors, (7257), 29 states have internal predecessors, (7257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:13:26,786 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:13:26,786 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 248 of 661 [2023-08-31 01:13:26,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:13:34,550 INFO L130 PetriNetUnfolder]: 13874/20058 cut-off events. [2023-08-31 01:13:34,550 INFO L131 PetriNetUnfolder]: For 1013832/1013832 co-relation queries the response was YES. [2023-08-31 01:13:34,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 222470 conditions, 20058 events. 13874/20058 cut-off events. For 1013832/1013832 co-relation queries the response was YES. Maximal size of possible extension queue 1032. Compared 121902 event pairs, 3012 based on Foata normal form. 1/20059 useless extension candidates. Maximal degree in co-relation 222255. Up to 7624 conditions per place. [2023-08-31 01:13:34,835 INFO L137 encePairwiseOnDemand]: 647/661 looper letters, 579 selfloop transitions, 530 changer transitions 1/1110 dead transitions. [2023-08-31 01:13:34,835 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 1110 transitions, 24921 flow [2023-08-31 01:13:34,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-31 01:13:34,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-31 01:13:34,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 4650 transitions. [2023-08-31 01:13:34,841 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3908219868885527 [2023-08-31 01:13:34,841 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 4650 transitions. [2023-08-31 01:13:34,841 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 4650 transitions. [2023-08-31 01:13:34,842 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:13:34,842 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 4650 transitions. [2023-08-31 01:13:34,846 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 258.3333333333333) internal successors, (4650), 18 states have internal predecessors, (4650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:13:34,853 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 661.0) internal successors, (12559), 19 states have internal predecessors, (12559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:13:34,855 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 661.0) internal successors, (12559), 19 states have internal predecessors, (12559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:13:34,855 INFO L175 Difference]: Start difference. First operand has 358 places, 961 transitions, 20837 flow. Second operand 18 states and 4650 transitions. [2023-08-31 01:13:34,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 1110 transitions, 24921 flow [2023-08-31 01:13:43,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 1110 transitions, 23980 flow, removed 190 selfloop flow, removed 15 redundant places. [2023-08-31 01:13:43,385 INFO L231 Difference]: Finished difference. Result has 361 places, 963 transitions, 21037 flow [2023-08-31 01:13:43,386 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=661, PETRI_DIFFERENCE_MINUEND_FLOW=19896, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=961, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=528, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=431, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=21037, PETRI_PLACES=361, PETRI_TRANSITIONS=963} [2023-08-31 01:13:43,386 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 327 predicate places. [2023-08-31 01:13:43,386 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 963 transitions, 21037 flow [2023-08-31 01:13:43,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 250.24137931034483) internal successors, (7257), 29 states have internal predecessors, (7257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:13:43,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:13:43,387 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:13:43,393 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-08-31 01:13:43,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:13:43,588 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:13:43,588 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:13:43,588 INFO L85 PathProgramCache]: Analyzing trace with hash 320772784, now seen corresponding path program 14 times [2023-08-31 01:13:43,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:13:43,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785623075] [2023-08-31 01:13:43,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:13:43,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:13:43,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:13:44,393 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-31 01:13:44,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:13:44,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785623075] [2023-08-31 01:13:44,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785623075] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:13:44,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983680334] [2023-08-31 01:13:44,394 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 01:13:44,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:13:44,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:13:44,395 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:13:44,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-31 01:13:44,620 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 01:13:44,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:13:44,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 52 conjunts are in the unsatisfiable core [2023-08-31 01:13:44,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:13:45,005 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:13:45,005 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 59 treesize of output 75 [2023-08-31 01:13:45,202 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-31 01:13:45,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:13:45,651 INFO L321 Elim1Store]: treesize reduction 32, result has 73.6 percent of original size [2023-08-31 01:13:45,652 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 102 [2023-08-31 01:13:45,794 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-31 01:13:45,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983680334] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:13:45,794 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:13:45,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 10] total 35 [2023-08-31 01:13:45,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452457106] [2023-08-31 01:13:45,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:13:45,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-08-31 01:13:45,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:13:45,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-08-31 01:13:45,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1112, Unknown=0, NotChecked=0, Total=1260 [2023-08-31 01:13:49,017 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 248 out of 661 [2023-08-31 01:13:49,019 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 963 transitions, 21037 flow. Second operand has 36 states, 36 states have (on average 250.11111111111111) internal successors, (9004), 36 states have internal predecessors, (9004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:13:49,019 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:13:49,019 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 248 of 661 [2023-08-31 01:13:49,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:13:58,268 INFO L130 PetriNetUnfolder]: 15561/22588 cut-off events. [2023-08-31 01:13:58,269 INFO L131 PetriNetUnfolder]: For 1168704/1168704 co-relation queries the response was YES. [2023-08-31 01:13:58,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 252656 conditions, 22588 events. 15561/22588 cut-off events. For 1168704/1168704 co-relation queries the response was YES. Maximal size of possible extension queue 1169. Compared 140884 event pairs, 3718 based on Foata normal form. 2/22590 useless extension candidates. Maximal degree in co-relation 252440. Up to 15738 conditions per place. [2023-08-31 01:13:58,594 INFO L137 encePairwiseOnDemand]: 645/661 looper letters, 668 selfloop transitions, 583 changer transitions 2/1253 dead transitions. [2023-08-31 01:13:58,594 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 1253 transitions, 29150 flow [2023-08-31 01:13:58,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-31 01:13:58,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-31 01:13:58,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 6948 transitions. [2023-08-31 01:13:58,599 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38930912758446795 [2023-08-31 01:13:58,599 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 6948 transitions. [2023-08-31 01:13:58,599 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 6948 transitions. [2023-08-31 01:13:58,601 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:13:58,601 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 6948 transitions. [2023-08-31 01:13:58,606 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 257.3333333333333) internal successors, (6948), 27 states have internal predecessors, (6948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:13:58,616 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 661.0) internal successors, (18508), 28 states have internal predecessors, (18508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:13:58,618 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 661.0) internal successors, (18508), 28 states have internal predecessors, (18508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:13:58,618 INFO L175 Difference]: Start difference. First operand has 361 places, 963 transitions, 21037 flow. Second operand 27 states and 6948 transitions. [2023-08-31 01:13:58,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 1253 transitions, 29150 flow [2023-08-31 01:14:07,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 1253 transitions, 27999 flow, removed 32 selfloop flow, removed 16 redundant places. [2023-08-31 01:14:07,575 INFO L231 Difference]: Finished difference. Result has 378 places, 1063 transitions, 24510 flow [2023-08-31 01:14:07,576 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=661, PETRI_DIFFERENCE_MINUEND_FLOW=20035, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=963, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=491, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=459, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=24510, PETRI_PLACES=378, PETRI_TRANSITIONS=1063} [2023-08-31 01:14:07,577 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 344 predicate places. [2023-08-31 01:14:07,577 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 1063 transitions, 24510 flow [2023-08-31 01:14:07,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 250.11111111111111) internal successors, (9004), 36 states have internal predecessors, (9004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:14:07,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:14:07,578 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:14:07,586 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-08-31 01:14:07,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:14:07,778 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:14:07,779 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:14:07,779 INFO L85 PathProgramCache]: Analyzing trace with hash -1905575500, now seen corresponding path program 15 times [2023-08-31 01:14:07,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:14:07,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816532700] [2023-08-31 01:14:07,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:14:07,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:14:07,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:14:08,592 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-31 01:14:08,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:14:08,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816532700] [2023-08-31 01:14:08,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816532700] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:14:08,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128574034] [2023-08-31 01:14:08,593 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 01:14:08,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:14:08,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:14:08,594 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:14:08,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-31 01:14:08,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-31 01:14:08,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:14:08,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 54 conjunts are in the unsatisfiable core [2023-08-31 01:14:08,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:14:09,314 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:14:09,314 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 40 [2023-08-31 01:14:09,342 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-31 01:14:09,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:14:09,823 INFO L321 Elim1Store]: treesize reduction 32, result has 73.6 percent of original size [2023-08-31 01:14:09,823 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 102 [2023-08-31 01:14:09,938 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-31 01:14:09,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128574034] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:14:09,938 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:14:09,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 10] total 32 [2023-08-31 01:14:09,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83098879] [2023-08-31 01:14:09,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:14:09,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-31 01:14:09,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:14:09,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-31 01:14:09,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=917, Unknown=0, NotChecked=0, Total=1056 [2023-08-31 01:14:11,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 248 out of 661 [2023-08-31 01:14:11,909 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 1063 transitions, 24510 flow. Second operand has 33 states, 33 states have (on average 250.06060606060606) internal successors, (8252), 33 states have internal predecessors, (8252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:14:11,910 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:14:11,910 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 248 of 661 [2023-08-31 01:14:11,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:14:20,880 INFO L130 PetriNetUnfolder]: 15725/22834 cut-off events. [2023-08-31 01:14:20,880 INFO L131 PetriNetUnfolder]: For 1234863/1234863 co-relation queries the response was YES. [2023-08-31 01:14:21,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 261881 conditions, 22834 events. 15725/22834 cut-off events. For 1234863/1234863 co-relation queries the response was YES. Maximal size of possible extension queue 1191. Compared 142611 event pairs, 3812 based on Foata normal form. 2/22836 useless extension candidates. Maximal degree in co-relation 261658. Up to 16860 conditions per place. [2023-08-31 01:14:21,281 INFO L137 encePairwiseOnDemand]: 647/661 looper letters, 596 selfloop transitions, 601 changer transitions 1/1198 dead transitions. [2023-08-31 01:14:21,282 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 1198 transitions, 28864 flow [2023-08-31 01:14:21,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-31 01:14:21,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-31 01:14:21,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 5649 transitions. [2023-08-31 01:14:21,286 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3884610094897538 [2023-08-31 01:14:21,286 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 5649 transitions. [2023-08-31 01:14:21,286 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 5649 transitions. [2023-08-31 01:14:21,287 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:14:21,287 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 5649 transitions. [2023-08-31 01:14:21,292 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 256.77272727272725) internal successors, (5649), 22 states have internal predecessors, (5649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:14:21,301 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 661.0) internal successors, (15203), 23 states have internal predecessors, (15203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:14:21,303 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 661.0) internal successors, (15203), 23 states have internal predecessors, (15203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:14:21,303 INFO L175 Difference]: Start difference. First operand has 378 places, 1063 transitions, 24510 flow. Second operand 22 states and 5649 transitions. [2023-08-31 01:14:21,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 1198 transitions, 28864 flow [2023-08-31 01:14:31,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 1198 transitions, 28231 flow, removed 146 selfloop flow, removed 13 redundant places. [2023-08-31 01:14:31,987 INFO L231 Difference]: Finished difference. Result has 387 places, 1070 transitions, 25367 flow [2023-08-31 01:14:31,988 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=661, PETRI_DIFFERENCE_MINUEND_FLOW=23929, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1063, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=595, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=464, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=25367, PETRI_PLACES=387, PETRI_TRANSITIONS=1070} [2023-08-31 01:14:31,988 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 353 predicate places. [2023-08-31 01:14:31,988 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 1070 transitions, 25367 flow [2023-08-31 01:14:31,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 250.06060606060606) internal successors, (8252), 33 states have internal predecessors, (8252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:14:31,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:14:31,990 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:14:31,997 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-08-31 01:14:32,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-08-31 01:14:32,198 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:14:32,198 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:14:32,198 INFO L85 PathProgramCache]: Analyzing trace with hash -1669845044, now seen corresponding path program 16 times [2023-08-31 01:14:32,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:14:32,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639629639] [2023-08-31 01:14:32,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:14:32,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:14:32,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:14:34,278 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-31 01:14:34,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:14:34,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639629639] [2023-08-31 01:14:34,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639629639] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:14:34,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404013460] [2023-08-31 01:14:34,279 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 01:14:34,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:14:34,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:14:34,280 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:14:34,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-08-31 01:14:34,509 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 01:14:34,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:14:34,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 54 conjunts are in the unsatisfiable core [2023-08-31 01:14:34,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:14:34,963 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:14:34,963 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 40 [2023-08-31 01:14:35,089 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-31 01:14:35,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:14:35,637 INFO L321 Elim1Store]: treesize reduction 32, result has 73.6 percent of original size [2023-08-31 01:14:35,640 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 102 [2023-08-31 01:14:35,852 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-31 01:14:35,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404013460] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:14:35,852 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:14:35,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 15, 10] total 50 [2023-08-31 01:14:35,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018886035] [2023-08-31 01:14:35,853 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:14:35,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-08-31 01:14:35,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:14:35,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-08-31 01:14:35,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=2307, Unknown=0, NotChecked=0, Total=2550 [2023-08-31 01:14:43,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 226 out of 661 [2023-08-31 01:14:43,194 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 1070 transitions, 25367 flow. Second operand has 51 states, 51 states have (on average 227.86274509803923) internal successors, (11621), 51 states have internal predecessors, (11621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:14:43,194 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:14:43,194 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 226 of 661 [2023-08-31 01:14:43,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:15:22,967 INFO L130 PetriNetUnfolder]: 63065/91624 cut-off events. [2023-08-31 01:15:22,968 INFO L131 PetriNetUnfolder]: For 5143640/5143640 co-relation queries the response was YES. [2023-08-31 01:15:25,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1063758 conditions, 91624 events. 63065/91624 cut-off events. For 5143640/5143640 co-relation queries the response was YES. Maximal size of possible extension queue 4289. Compared 682428 event pairs, 16156 based on Foata normal form. 8/91632 useless extension candidates. Maximal degree in co-relation 1063480. Up to 19441 conditions per place. [2023-08-31 01:15:25,690 INFO L137 encePairwiseOnDemand]: 643/661 looper letters, 2463 selfloop transitions, 2233 changer transitions 4/4700 dead transitions. [2023-08-31 01:15:25,690 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 458 places, 4700 transitions, 117214 flow [2023-08-31 01:15:25,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2023-08-31 01:15:25,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2023-08-31 01:15:25,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 16952 transitions. [2023-08-31 01:15:25,699 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35619431837283577 [2023-08-31 01:15:25,700 INFO L72 ComplementDD]: Start complementDD. Operand 72 states and 16952 transitions. [2023-08-31 01:15:25,700 INFO L73 IsDeterministic]: Start isDeterministic. Operand 72 states and 16952 transitions. [2023-08-31 01:15:25,702 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:15:25,702 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 72 states and 16952 transitions. [2023-08-31 01:15:25,716 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 73 states, 72 states have (on average 235.44444444444446) internal successors, (16952), 72 states have internal predecessors, (16952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:15:25,748 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 73 states, 73 states have (on average 661.0) internal successors, (48253), 73 states have internal predecessors, (48253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:15:25,756 INFO L81 ComplementDD]: Finished complementDD. Result has 73 states, 73 states have (on average 661.0) internal successors, (48253), 73 states have internal predecessors, (48253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:15:25,756 INFO L175 Difference]: Start difference. First operand has 387 places, 1070 transitions, 25367 flow. Second operand 72 states and 16952 transitions. [2023-08-31 01:15:25,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 458 places, 4700 transitions, 117214 flow [2023-08-31 01:19:29,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 443 places, 4700 transitions, 114814 flow, removed 256 selfloop flow, removed 15 redundant places. [2023-08-31 01:19:29,666 INFO L231 Difference]: Finished difference. Result has 451 places, 2741 transitions, 77784 flow [2023-08-31 01:19:29,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=661, PETRI_DIFFERENCE_MINUEND_FLOW=24772, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1070, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=565, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=499, PETRI_DIFFERENCE_SUBTRAHEND_STATES=72, PETRI_FLOW=77784, PETRI_PLACES=451, PETRI_TRANSITIONS=2741} [2023-08-31 01:19:29,667 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 417 predicate places. [2023-08-31 01:19:29,667 INFO L495 AbstractCegarLoop]: Abstraction has has 451 places, 2741 transitions, 77784 flow [2023-08-31 01:19:29,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 227.86274509803923) internal successors, (11621), 51 states have internal predecessors, (11621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:19:29,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:19:29,670 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:19:29,676 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-08-31 01:19:29,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-08-31 01:19:29,870 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:19:29,871 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:19:29,871 INFO L85 PathProgramCache]: Analyzing trace with hash -341568430, now seen corresponding path program 17 times [2023-08-31 01:19:29,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:19:29,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292183759] [2023-08-31 01:19:29,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:19:29,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:19:29,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:19:30,668 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-31 01:19:30,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:19:30,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292183759] [2023-08-31 01:19:30,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292183759] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:19:30,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072613568] [2023-08-31 01:19:30,668 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 01:19:30,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:19:30,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:19:30,670 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:19:30,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-08-31 01:19:31,216 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-31 01:19:31,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:19:31,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 54 conjunts are in the unsatisfiable core [2023-08-31 01:19:31,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:19:31,575 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:19:31,576 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 40 [2023-08-31 01:19:31,614 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-31 01:19:31,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:19:32,098 INFO L321 Elim1Store]: treesize reduction 32, result has 73.6 percent of original size [2023-08-31 01:19:32,098 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 102 [2023-08-31 01:19:32,231 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-31 01:19:32,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072613568] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:19:32,231 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:19:32,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 10] total 31 [2023-08-31 01:19:32,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732085938] [2023-08-31 01:19:32,232 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:19:32,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-31 01:19:32,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:19:32,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-31 01:19:32,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=856, Unknown=0, NotChecked=0, Total=992 [2023-08-31 01:19:34,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 248 out of 661 [2023-08-31 01:19:34,092 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 2741 transitions, 77784 flow. Second operand has 32 states, 32 states have (on average 250.09375) internal successors, (8003), 32 states have internal predecessors, (8003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:19:34,092 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:19:34,092 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 248 of 661 [2023-08-31 01:19:34,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:20:27,856 INFO L130 PetriNetUnfolder]: 63061/91616 cut-off events. [2023-08-31 01:20:27,856 INFO L131 PetriNetUnfolder]: For 5097684/5097684 co-relation queries the response was YES. [2023-08-31 01:20:30,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1067844 conditions, 91616 events. 63061/91616 cut-off events. For 5097684/5097684 co-relation queries the response was YES. Maximal size of possible extension queue 4289. Compared 681722 event pairs, 15774 based on Foata normal form. 8/91624 useless extension candidates. Maximal degree in co-relation 1067528. Up to 67344 conditions per place. [2023-08-31 01:20:30,827 INFO L137 encePairwiseOnDemand]: 647/661 looper letters, 626 selfloop transitions, 2244 changer transitions 1/2871 dead transitions. [2023-08-31 01:20:30,827 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 473 places, 2871 transitions, 85266 flow [2023-08-31 01:20:30,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-31 01:20:30,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-31 01:20:30,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 5899 transitions. [2023-08-31 01:20:30,831 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38801552325198974 [2023-08-31 01:20:30,831 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 5899 transitions. [2023-08-31 01:20:30,831 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 5899 transitions. [2023-08-31 01:20:30,832 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:20:30,832 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 5899 transitions. [2023-08-31 01:20:30,835 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 256.4782608695652) internal successors, (5899), 23 states have internal predecessors, (5899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:20:30,840 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 661.0) internal successors, (15864), 24 states have internal predecessors, (15864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:20:30,841 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 661.0) internal successors, (15864), 24 states have internal predecessors, (15864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:20:30,841 INFO L175 Difference]: Start difference. First operand has 451 places, 2741 transitions, 77784 flow. Second operand 23 states and 5899 transitions. [2023-08-31 01:20:30,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 473 places, 2871 transitions, 85266 flow Killed by 15