./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/chl-word-trans.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --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-word-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 73462fb8dbdc39f07edabdd79150cbad579fbba379eb033cd2e89802bbb8b9a6 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 19:19:03,915 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 19:19:03,918 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 19:19:03,960 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 19:19:03,961 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 19:19:03,964 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 19:19:03,966 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 19:19:03,968 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 19:19:03,970 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 19:19:03,974 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 19:19:03,975 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 19:19:03,977 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 19:19:03,978 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 19:19:03,980 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 19:19:03,981 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 19:19:03,986 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 19:19:03,987 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 19:19:03,989 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 19:19:03,990 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 19:19:03,995 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 19:19:04,001 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 19:19:04,003 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 19:19:04,003 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 19:19:04,004 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 19:19:04,010 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 19:19:04,011 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 19:19:04,011 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 19:19:04,013 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 19:19:04,013 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 19:19:04,014 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 19:19:04,014 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 19:19:04,016 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 19:19:04,017 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 19:19:04,019 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 19:19:04,020 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 19:19:04,020 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 19:19:04,021 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 19:19:04,021 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 19:19:04,022 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 19:19:04,022 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 19:19:04,023 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 19:19:04,024 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-30 19:19:04,057 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 19:19:04,057 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 19:19:04,058 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 19:19:04,058 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 19:19:04,059 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 19:19:04,059 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 19:19:04,059 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 19:19:04,060 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 19:19:04,060 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 19:19:04,060 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 19:19:04,061 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 19:19:04,061 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 19:19:04,061 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 19:19:04,062 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 19:19:04,062 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 19:19:04,062 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 19:19:04,062 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 19:19:04,062 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 19:19:04,063 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 19:19:04,063 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 19:19:04,063 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 19:19:04,063 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 19:19:04,063 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 19:19:04,063 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 19:19:04,064 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 19:19:04,064 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 19:19:04,064 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 19:19:04,064 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 19:19:04,064 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 19:19:04,065 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 19:19:04,065 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 19:19:04,065 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 19:19:04,065 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 19:19:04,065 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 19:19:04,066 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 19:19:04,066 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 73462fb8dbdc39f07edabdd79150cbad579fbba379eb033cd2e89802bbb8b9a6 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 19:19:04,363 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 19:19:04,394 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 19:19:04,396 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 19:19:04,397 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 19:19:04,397 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 19:19:04,398 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-word-trans.wvr.c [2023-08-30 19:19:05,710 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 19:19:05,908 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 19:19:05,908 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-word-trans.wvr.c [2023-08-30 19:19:05,913 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/be3a01898/a5e7cadd6d7d4326ace034c542d1ce73/FLAG053f43c91 [2023-08-30 19:19:05,923 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/be3a01898/a5e7cadd6d7d4326ace034c542d1ce73 [2023-08-30 19:19:05,926 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 19:19:05,927 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 19:19:05,927 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 19:19:05,928 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 19:19:05,930 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 19:19:05,931 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 07:19:05" (1/1) ... [2023-08-30 19:19:05,932 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45cd4b5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:19:05, skipping insertion in model container [2023-08-30 19:19:05,932 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 07:19:05" (1/1) ... [2023-08-30 19:19:05,938 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 19:19:05,964 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 19:19:06,098 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-word-trans.wvr.c[3292,3305] [2023-08-30 19:19:06,107 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 19:19:06,114 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 19:19:06,137 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-word-trans.wvr.c[3292,3305] [2023-08-30 19:19:06,140 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 19:19:06,153 INFO L208 MainTranslator]: Completed translation [2023-08-30 19:19:06,153 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:19:06 WrapperNode [2023-08-30 19:19:06,153 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 19:19:06,154 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 19:19:06,154 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 19:19:06,154 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 19:19:06,160 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:19:06" (1/1) ... [2023-08-30 19:19:06,167 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:19:06" (1/1) ... [2023-08-30 19:19:06,189 INFO L138 Inliner]: procedures = 25, calls = 44, calls flagged for inlining = 8, calls inlined = 12, statements flattened = 181 [2023-08-30 19:19:06,189 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 19:19:06,190 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 19:19:06,190 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 19:19:06,190 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 19:19:06,197 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:19:06" (1/1) ... [2023-08-30 19:19:06,198 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:19:06" (1/1) ... [2023-08-30 19:19:06,201 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:19:06" (1/1) ... [2023-08-30 19:19:06,201 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:19:06" (1/1) ... [2023-08-30 19:19:06,229 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:19:06" (1/1) ... [2023-08-30 19:19:06,233 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:19:06" (1/1) ... [2023-08-30 19:19:06,235 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:19:06" (1/1) ... [2023-08-30 19:19:06,236 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:19:06" (1/1) ... [2023-08-30 19:19:06,239 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 19:19:06,250 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 19:19:06,251 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 19:19:06,251 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 19:19:06,252 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:19:06" (1/1) ... [2023-08-30 19:19:06,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 19:19:06,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:19:06,281 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) [2023-08-30 19:19:06,306 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 [2023-08-30 19:19:06,324 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 19:19:06,325 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 19:19:06,325 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 19:19:06,325 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 19:19:06,325 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 19:19:06,326 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 19:19:06,326 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 19:19:06,327 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 19:19:06,327 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-30 19:19:06,327 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-30 19:19:06,327 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 19:19:06,327 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 19:19:06,327 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 19:19:06,327 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 19:19:06,328 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 19:19:06,329 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 19:19:06,451 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 19:19:06,453 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 19:19:06,863 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 19:19:06,872 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 19:19:06,879 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-08-30 19:19:06,882 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 07:19:06 BoogieIcfgContainer [2023-08-30 19:19:06,882 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 19:19:06,883 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 19:19:06,884 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 19:19:06,886 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 19:19:06,887 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 07:19:05" (1/3) ... [2023-08-30 19:19:06,889 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bc2e84f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 07:19:06, skipping insertion in model container [2023-08-30 19:19:06,890 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:19:06" (2/3) ... [2023-08-30 19:19:06,890 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bc2e84f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 07:19:06, skipping insertion in model container [2023-08-30 19:19:06,890 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 07:19:06" (3/3) ... [2023-08-30 19:19:06,891 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-word-trans.wvr.c [2023-08-30 19:19:06,899 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 19:19:06,907 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 19:19:06,908 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-30 19:19:06,908 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 19:19:07,040 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-30 19:19:07,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 273 places, 291 transitions, 606 flow [2023-08-30 19:19:07,174 INFO L130 PetriNetUnfolder]: 28/288 cut-off events. [2023-08-30 19:19:07,178 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 19:19:07,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 301 conditions, 288 events. 28/288 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 367 event pairs, 0 based on Foata normal form. 0/259 useless extension candidates. Maximal degree in co-relation 232. Up to 3 conditions per place. [2023-08-30 19:19:07,189 INFO L82 GeneralOperation]: Start removeDead. Operand has 273 places, 291 transitions, 606 flow [2023-08-30 19:19:07,196 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 260 places, 278 transitions, 574 flow [2023-08-30 19:19:07,199 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 19:19:07,208 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 260 places, 278 transitions, 574 flow [2023-08-30 19:19:07,213 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 260 places, 278 transitions, 574 flow [2023-08-30 19:19:07,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 260 places, 278 transitions, 574 flow [2023-08-30 19:19:07,260 INFO L130 PetriNetUnfolder]: 28/278 cut-off events. [2023-08-30 19:19:07,261 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 19:19:07,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 291 conditions, 278 events. 28/278 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 366 event pairs, 0 based on Foata normal form. 0/250 useless extension candidates. Maximal degree in co-relation 232. Up to 3 conditions per place. [2023-08-30 19:19:07,267 INFO L119 LiptonReduction]: Number of co-enabled transitions 7560 [2023-08-30 19:19:15,355 INFO L134 LiptonReduction]: Checked pairs total: 9572 [2023-08-30 19:19:15,356 INFO L136 LiptonReduction]: Total number of compositions: 286 [2023-08-30 19:19:15,368 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 19:19:15,374 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;@7f40c20a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 19:19:15,375 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-30 19:19:15,384 INFO L130 PetriNetUnfolder]: 11/38 cut-off events. [2023-08-30 19:19:15,384 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 19:19:15,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:19:15,385 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:19:15,385 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)] === [2023-08-30 19:19:15,389 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:19:15,390 INFO L85 PathProgramCache]: Analyzing trace with hash -198049977, now seen corresponding path program 1 times [2023-08-30 19:19:15,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:19:15,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258306653] [2023-08-30 19:19:15,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:19:15,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:19:15,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:19:16,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:19:16,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:19:16,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258306653] [2023-08-30 19:19:16,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258306653] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:19:16,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:19:16,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 19:19:16,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917570386] [2023-08-30 19:19:16,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:19:16,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 19:19:16,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:19:16,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 19:19:16,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 19:19:16,354 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 251 out of 577 [2023-08-30 19:19:16,359 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 39 transitions, 96 flow. Second operand has 5 states, 5 states have (on average 254.8) internal successors, (1274), 5 states have internal predecessors, (1274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:16,359 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:19:16,359 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 251 of 577 [2023-08-30 19:19:16,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:19:16,761 INFO L130 PetriNetUnfolder]: 1171/1617 cut-off events. [2023-08-30 19:19:16,761 INFO L131 PetriNetUnfolder]: For 94/94 co-relation queries the response was YES. [2023-08-30 19:19:16,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3350 conditions, 1617 events. 1171/1617 cut-off events. For 94/94 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 5881 event pairs, 283 based on Foata normal form. 1/1040 useless extension candidates. Maximal degree in co-relation 2879. Up to 593 conditions per place. [2023-08-30 19:19:16,772 INFO L137 encePairwiseOnDemand]: 566/577 looper letters, 100 selfloop transitions, 18 changer transitions 2/121 dead transitions. [2023-08-30 19:19:16,772 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 121 transitions, 539 flow [2023-08-30 19:19:16,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 19:19:16,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 19:19:16,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1878 transitions. [2023-08-30 19:19:16,795 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4649665758851201 [2023-08-30 19:19:16,795 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1878 transitions. [2023-08-30 19:19:16,796 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1878 transitions. [2023-08-30 19:19:16,800 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:19:16,802 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1878 transitions. [2023-08-30 19:19:16,809 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 268.2857142857143) internal successors, (1878), 7 states have internal predecessors, (1878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:16,820 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 577.0) internal successors, (4616), 8 states have internal predecessors, (4616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:16,822 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 577.0) internal successors, (4616), 8 states have internal predecessors, (4616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:16,824 INFO L175 Difference]: Start difference. First operand has 38 places, 39 transitions, 96 flow. Second operand 7 states and 1878 transitions. [2023-08-30 19:19:16,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 121 transitions, 539 flow [2023-08-30 19:19:16,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 121 transitions, 501 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-30 19:19:16,835 INFO L231 Difference]: Finished difference. Result has 42 places, 55 transitions, 196 flow [2023-08-30 19:19:16,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=577, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=196, PETRI_PLACES=42, PETRI_TRANSITIONS=55} [2023-08-30 19:19:16,840 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 4 predicate places. [2023-08-30 19:19:16,840 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 55 transitions, 196 flow [2023-08-30 19:19:16,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 254.8) internal successors, (1274), 5 states have internal predecessors, (1274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:16,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:19:16,841 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:19:16,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 19:19:16,843 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)] === [2023-08-30 19:19:16,846 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:19:16,846 INFO L85 PathProgramCache]: Analyzing trace with hash 1928900777, now seen corresponding path program 2 times [2023-08-30 19:19:16,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:19:16,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960727684] [2023-08-30 19:19:16,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:19:16,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:19:16,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:19:17,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:19:17,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:19:17,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960727684] [2023-08-30 19:19:17,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960727684] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:19:17,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:19:17,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 19:19:17,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377029762] [2023-08-30 19:19:17,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:19:17,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 19:19:17,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:19:17,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 19:19:17,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 19:19:17,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 251 out of 577 [2023-08-30 19:19:17,167 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 55 transitions, 196 flow. Second operand has 5 states, 5 states have (on average 254.8) internal successors, (1274), 5 states have internal predecessors, (1274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:17,167 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:19:17,167 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 251 of 577 [2023-08-30 19:19:17,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:19:17,572 INFO L130 PetriNetUnfolder]: 1367/1957 cut-off events. [2023-08-30 19:19:17,572 INFO L131 PetriNetUnfolder]: For 694/703 co-relation queries the response was YES. [2023-08-30 19:19:17,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5164 conditions, 1957 events. 1367/1957 cut-off events. For 694/703 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 7959 event pairs, 141 based on Foata normal form. 9/1724 useless extension candidates. Maximal degree in co-relation 4458. Up to 691 conditions per place. [2023-08-30 19:19:17,583 INFO L137 encePairwiseOnDemand]: 565/577 looper letters, 114 selfloop transitions, 30 changer transitions 1/146 dead transitions. [2023-08-30 19:19:17,584 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 146 transitions, 760 flow [2023-08-30 19:19:17,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 19:19:17,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 19:19:17,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1887 transitions. [2023-08-30 19:19:17,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46719485021044815 [2023-08-30 19:19:17,589 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1887 transitions. [2023-08-30 19:19:17,589 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1887 transitions. [2023-08-30 19:19:17,590 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:19:17,590 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1887 transitions. [2023-08-30 19:19:17,593 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 269.57142857142856) internal successors, (1887), 7 states have internal predecessors, (1887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:17,599 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 577.0) internal successors, (4616), 8 states have internal predecessors, (4616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:17,602 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 577.0) internal successors, (4616), 8 states have internal predecessors, (4616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:17,602 INFO L175 Difference]: Start difference. First operand has 42 places, 55 transitions, 196 flow. Second operand 7 states and 1887 transitions. [2023-08-30 19:19:17,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 146 transitions, 760 flow [2023-08-30 19:19:17,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 146 transitions, 754 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-08-30 19:19:17,609 INFO L231 Difference]: Finished difference. Result has 51 places, 77 transitions, 409 flow [2023-08-30 19:19:17,609 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=577, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=409, PETRI_PLACES=51, PETRI_TRANSITIONS=77} [2023-08-30 19:19:17,610 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 13 predicate places. [2023-08-30 19:19:17,610 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 77 transitions, 409 flow [2023-08-30 19:19:17,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 254.8) internal successors, (1274), 5 states have internal predecessors, (1274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:17,611 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:19:17,611 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:19:17,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 19:19:17,611 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)] === [2023-08-30 19:19:17,612 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:19:17,612 INFO L85 PathProgramCache]: Analyzing trace with hash 178772231, now seen corresponding path program 3 times [2023-08-30 19:19:17,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:19:17,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032683344] [2023-08-30 19:19:17,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:19:17,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:19:17,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:19:17,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:19:17,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:19:17,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032683344] [2023-08-30 19:19:17,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032683344] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:19:17,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:19:17,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 19:19:17,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180477225] [2023-08-30 19:19:17,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:19:17,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 19:19:17,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:19:17,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 19:19:17,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 19:19:17,891 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 251 out of 577 [2023-08-30 19:19:17,892 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 77 transitions, 409 flow. Second operand has 5 states, 5 states have (on average 254.8) internal successors, (1274), 5 states have internal predecessors, (1274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:17,893 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:19:17,893 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 251 of 577 [2023-08-30 19:19:17,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:19:18,294 INFO L130 PetriNetUnfolder]: 1591/2329 cut-off events. [2023-08-30 19:19:18,294 INFO L131 PetriNetUnfolder]: For 2804/2855 co-relation queries the response was YES. [2023-08-30 19:19:18,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7179 conditions, 2329 events. 1591/2329 cut-off events. For 2804/2855 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 10018 event pairs, 733 based on Foata normal form. 9/2089 useless extension candidates. Maximal degree in co-relation 6382. Up to 1571 conditions per place. [2023-08-30 19:19:18,309 INFO L137 encePairwiseOnDemand]: 571/577 looper letters, 106 selfloop transitions, 12 changer transitions 2/121 dead transitions. [2023-08-30 19:19:18,309 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 121 transitions, 815 flow [2023-08-30 19:19:18,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 19:19:18,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 19:19:18,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1337 transitions. [2023-08-30 19:19:18,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634315424610052 [2023-08-30 19:19:18,313 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1337 transitions. [2023-08-30 19:19:18,313 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1337 transitions. [2023-08-30 19:19:18,313 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:19:18,314 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1337 transitions. [2023-08-30 19:19:18,316 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 267.4) internal successors, (1337), 5 states have internal predecessors, (1337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:18,320 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 577.0) internal successors, (3462), 6 states have internal predecessors, (3462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:18,322 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 577.0) internal successors, (3462), 6 states have internal predecessors, (3462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:18,322 INFO L175 Difference]: Start difference. First operand has 51 places, 77 transitions, 409 flow. Second operand 5 states and 1337 transitions. [2023-08-30 19:19:18,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 121 transitions, 815 flow [2023-08-30 19:19:18,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 121 transitions, 799 flow, removed 8 selfloop flow, removed 0 redundant places. [2023-08-30 19:19:18,344 INFO L231 Difference]: Finished difference. Result has 58 places, 80 transitions, 469 flow [2023-08-30 19:19:18,344 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=577, PETRI_DIFFERENCE_MINUEND_FLOW=397, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=469, PETRI_PLACES=58, PETRI_TRANSITIONS=80} [2023-08-30 19:19:18,346 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 20 predicate places. [2023-08-30 19:19:18,349 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 80 transitions, 469 flow [2023-08-30 19:19:18,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 254.8) internal successors, (1274), 5 states have internal predecessors, (1274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:18,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:19:18,350 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:19:18,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 19:19:18,350 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)] === [2023-08-30 19:19:18,351 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:19:18,351 INFO L85 PathProgramCache]: Analyzing trace with hash -199425411, now seen corresponding path program 4 times [2023-08-30 19:19:18,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:19:18,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194686754] [2023-08-30 19:19:18,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:19:18,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:19:18,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:19:18,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:19:18,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:19:18,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194686754] [2023-08-30 19:19:18,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194686754] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:19:18,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:19:18,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 19:19:18,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028677311] [2023-08-30 19:19:18,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:19:18,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 19:19:18,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:19:18,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 19:19:18,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 19:19:18,737 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 250 out of 577 [2023-08-30 19:19:18,739 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 80 transitions, 469 flow. Second operand has 5 states, 5 states have (on average 253.8) internal successors, (1269), 5 states have internal predecessors, (1269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:18,739 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:19:18,739 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 250 of 577 [2023-08-30 19:19:18,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:19:19,157 INFO L130 PetriNetUnfolder]: 1644/2403 cut-off events. [2023-08-30 19:19:19,157 INFO L131 PetriNetUnfolder]: For 3444/3506 co-relation queries the response was YES. [2023-08-30 19:19:19,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7615 conditions, 2403 events. 1644/2403 cut-off events. For 3444/3506 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 10519 event pairs, 309 based on Foata normal form. 30/2183 useless extension candidates. Maximal degree in co-relation 6806. Up to 1143 conditions per place. [2023-08-30 19:19:19,173 INFO L137 encePairwiseOnDemand]: 565/577 looper letters, 109 selfloop transitions, 33 changer transitions 1/144 dead transitions. [2023-08-30 19:19:19,173 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 144 transitions, 974 flow [2023-08-30 19:19:19,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 19:19:19,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 19:19:19,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1614 transitions. [2023-08-30 19:19:19,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4662045060658579 [2023-08-30 19:19:19,178 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1614 transitions. [2023-08-30 19:19:19,178 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1614 transitions. [2023-08-30 19:19:19,179 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:19:19,179 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1614 transitions. [2023-08-30 19:19:19,182 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 269.0) internal successors, (1614), 6 states have internal predecessors, (1614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:19,186 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 577.0) internal successors, (4039), 7 states have internal predecessors, (4039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:19,187 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 577.0) internal successors, (4039), 7 states have internal predecessors, (4039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:19,187 INFO L175 Difference]: Start difference. First operand has 58 places, 80 transitions, 469 flow. Second operand 6 states and 1614 transitions. [2023-08-30 19:19:19,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 144 transitions, 974 flow [2023-08-30 19:19:19,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 144 transitions, 954 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-30 19:19:19,210 INFO L231 Difference]: Finished difference. Result has 65 places, 88 transitions, 633 flow [2023-08-30 19:19:19,211 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=577, PETRI_DIFFERENCE_MINUEND_FLOW=453, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=633, PETRI_PLACES=65, PETRI_TRANSITIONS=88} [2023-08-30 19:19:19,211 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 27 predicate places. [2023-08-30 19:19:19,212 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 88 transitions, 633 flow [2023-08-30 19:19:19,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 253.8) internal successors, (1269), 5 states have internal predecessors, (1269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:19,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:19:19,212 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:19:19,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 19:19:19,213 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)] === [2023-08-30 19:19:19,213 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:19:19,213 INFO L85 PathProgramCache]: Analyzing trace with hash -1670298909, now seen corresponding path program 5 times [2023-08-30 19:19:19,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:19:19,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183157926] [2023-08-30 19:19:19,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:19:19,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:19:19,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:19:19,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:19:19,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:19:19,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183157926] [2023-08-30 19:19:19,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183157926] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:19:19,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:19:19,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 19:19:19,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433750444] [2023-08-30 19:19:19,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:19:19,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 19:19:19,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:19:19,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 19:19:19,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 19:19:19,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 250 out of 577 [2023-08-30 19:19:19,484 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 88 transitions, 633 flow. Second operand has 5 states, 5 states have (on average 253.8) internal successors, (1269), 5 states have internal predecessors, (1269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:19,484 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:19:19,484 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 250 of 577 [2023-08-30 19:19:19,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:19:19,915 INFO L130 PetriNetUnfolder]: 1738/2562 cut-off events. [2023-08-30 19:19:19,915 INFO L131 PetriNetUnfolder]: For 6258/6309 co-relation queries the response was YES. [2023-08-30 19:19:19,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9011 conditions, 2562 events. 1738/2562 cut-off events. For 6258/6309 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 11549 event pairs, 309 based on Foata normal form. 25/2327 useless extension candidates. Maximal degree in co-relation 8077. Up to 1109 conditions per place. [2023-08-30 19:19:19,934 INFO L137 encePairwiseOnDemand]: 565/577 looper letters, 138 selfloop transitions, 49 changer transitions 3/191 dead transitions. [2023-08-30 19:19:19,934 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 191 transitions, 1526 flow [2023-08-30 19:19:19,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 19:19:19,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 19:19:19,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1883 transitions. [2023-08-30 19:19:19,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4662045060658579 [2023-08-30 19:19:19,941 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1883 transitions. [2023-08-30 19:19:19,941 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1883 transitions. [2023-08-30 19:19:19,942 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:19:19,942 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1883 transitions. [2023-08-30 19:19:19,946 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 269.0) internal successors, (1883), 7 states have internal predecessors, (1883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:19,951 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 577.0) internal successors, (4616), 8 states have internal predecessors, (4616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:19,952 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 577.0) internal successors, (4616), 8 states have internal predecessors, (4616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:19,952 INFO L175 Difference]: Start difference. First operand has 65 places, 88 transitions, 633 flow. Second operand 7 states and 1883 transitions. [2023-08-30 19:19:19,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 191 transitions, 1526 flow [2023-08-30 19:19:20,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 191 transitions, 1447 flow, removed 32 selfloop flow, removed 1 redundant places. [2023-08-30 19:19:20,018 INFO L231 Difference]: Finished difference. Result has 74 places, 115 transitions, 1022 flow [2023-08-30 19:19:20,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=577, PETRI_DIFFERENCE_MINUEND_FLOW=594, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1022, PETRI_PLACES=74, PETRI_TRANSITIONS=115} [2023-08-30 19:19:20,021 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 36 predicate places. [2023-08-30 19:19:20,021 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 115 transitions, 1022 flow [2023-08-30 19:19:20,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 253.8) internal successors, (1269), 5 states have internal predecessors, (1269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:20,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:19:20,022 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:19:20,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-30 19:19:20,022 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)] === [2023-08-30 19:19:20,023 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:19:20,023 INFO L85 PathProgramCache]: Analyzing trace with hash -1323803525, now seen corresponding path program 6 times [2023-08-30 19:19:20,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:19:20,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949771353] [2023-08-30 19:19:20,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:19:20,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:19:20,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:19:20,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:19:20,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:19:20,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949771353] [2023-08-30 19:19:20,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949771353] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:19:20,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:19:20,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 19:19:20,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666783283] [2023-08-30 19:19:20,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:19:20,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 19:19:20,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:19:20,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 19:19:20,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 19:19:20,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 251 out of 577 [2023-08-30 19:19:20,377 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 115 transitions, 1022 flow. Second operand has 5 states, 5 states have (on average 254.8) internal successors, (1274), 5 states have internal predecessors, (1274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:20,377 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:19:20,377 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 251 of 577 [2023-08-30 19:19:20,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:19:20,893 INFO L130 PetriNetUnfolder]: 1764/2587 cut-off events. [2023-08-30 19:19:20,893 INFO L131 PetriNetUnfolder]: For 6995/7076 co-relation queries the response was YES. [2023-08-30 19:19:20,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10052 conditions, 2587 events. 1764/2587 cut-off events. For 6995/7076 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 11758 event pairs, 165 based on Foata normal form. 67/2446 useless extension candidates. Maximal degree in co-relation 9518. Up to 1039 conditions per place. [2023-08-30 19:19:20,912 INFO L137 encePairwiseOnDemand]: 565/577 looper letters, 141 selfloop transitions, 53 changer transitions 1/196 dead transitions. [2023-08-30 19:19:20,912 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 196 transitions, 1737 flow [2023-08-30 19:19:20,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 19:19:20,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 19:19:20,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1889 transitions. [2023-08-30 19:19:20,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46769002228274326 [2023-08-30 19:19:20,917 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1889 transitions. [2023-08-30 19:19:20,917 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1889 transitions. [2023-08-30 19:19:20,918 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:19:20,918 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1889 transitions. [2023-08-30 19:19:20,922 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 269.85714285714283) internal successors, (1889), 7 states have internal predecessors, (1889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:20,927 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 577.0) internal successors, (4616), 8 states have internal predecessors, (4616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:20,928 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 577.0) internal successors, (4616), 8 states have internal predecessors, (4616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:20,929 INFO L175 Difference]: Start difference. First operand has 74 places, 115 transitions, 1022 flow. Second operand 7 states and 1889 transitions. [2023-08-30 19:19:20,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 196 transitions, 1737 flow [2023-08-30 19:19:20,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 196 transitions, 1679 flow, removed 29 selfloop flow, removed 0 redundant places. [2023-08-30 19:19:20,991 INFO L231 Difference]: Finished difference. Result has 83 places, 122 transitions, 1217 flow [2023-08-30 19:19:20,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=577, PETRI_DIFFERENCE_MINUEND_FLOW=986, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1217, PETRI_PLACES=83, PETRI_TRANSITIONS=122} [2023-08-30 19:19:20,992 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 45 predicate places. [2023-08-30 19:19:20,992 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 122 transitions, 1217 flow [2023-08-30 19:19:20,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 254.8) internal successors, (1274), 5 states have internal predecessors, (1274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:20,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:19:20,993 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:19:20,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 19:19:20,993 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)] === [2023-08-30 19:19:20,994 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:19:20,994 INFO L85 PathProgramCache]: Analyzing trace with hash 1753561899, now seen corresponding path program 1 times [2023-08-30 19:19:20,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:19:20,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174734469] [2023-08-30 19:19:20,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:19:20,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:19:21,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:19:21,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:19:21,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:19:21,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174734469] [2023-08-30 19:19:21,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174734469] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:19:21,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:19:21,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 19:19:21,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069207821] [2023-08-30 19:19:21,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:19:21,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 19:19:21,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:19:21,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 19:19:21,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-30 19:19:21,354 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 251 out of 577 [2023-08-30 19:19:21,356 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 122 transitions, 1217 flow. Second operand has 6 states, 6 states have (on average 254.33333333333334) internal successors, (1526), 6 states have internal predecessors, (1526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:21,356 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:19:21,356 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 251 of 577 [2023-08-30 19:19:21,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:19:22,106 INFO L130 PetriNetUnfolder]: 3676/5509 cut-off events. [2023-08-30 19:19:22,106 INFO L131 PetriNetUnfolder]: For 25107/25147 co-relation queries the response was YES. [2023-08-30 19:19:22,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22955 conditions, 5509 events. 3676/5509 cut-off events. For 25107/25147 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 29569 event pairs, 790 based on Foata normal form. 5/5092 useless extension candidates. Maximal degree in co-relation 22394. Up to 1559 conditions per place. [2023-08-30 19:19:22,149 INFO L137 encePairwiseOnDemand]: 568/577 looper letters, 240 selfloop transitions, 64 changer transitions 23/328 dead transitions. [2023-08-30 19:19:22,150 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 328 transitions, 3666 flow [2023-08-30 19:19:22,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 19:19:22,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 19:19:22,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2157 transitions. [2023-08-30 19:19:22,155 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46728769497400346 [2023-08-30 19:19:22,155 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2157 transitions. [2023-08-30 19:19:22,155 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2157 transitions. [2023-08-30 19:19:22,156 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:19:22,156 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2157 transitions. [2023-08-30 19:19:22,161 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 269.625) internal successors, (2157), 8 states have internal predecessors, (2157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:22,166 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 577.0) internal successors, (5193), 9 states have internal predecessors, (5193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:22,179 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 577.0) internal successors, (5193), 9 states have internal predecessors, (5193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:22,180 INFO L175 Difference]: Start difference. First operand has 83 places, 122 transitions, 1217 flow. Second operand 8 states and 2157 transitions. [2023-08-30 19:19:22,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 328 transitions, 3666 flow [2023-08-30 19:19:22,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 328 transitions, 3472 flow, removed 30 selfloop flow, removed 3 redundant places. [2023-08-30 19:19:22,419 INFO L231 Difference]: Finished difference. Result has 90 places, 150 transitions, 1605 flow [2023-08-30 19:19:22,419 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=577, PETRI_DIFFERENCE_MINUEND_FLOW=1134, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1605, PETRI_PLACES=90, PETRI_TRANSITIONS=150} [2023-08-30 19:19:22,420 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 52 predicate places. [2023-08-30 19:19:22,420 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 150 transitions, 1605 flow [2023-08-30 19:19:22,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 254.33333333333334) internal successors, (1526), 6 states have internal predecessors, (1526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:22,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:19:22,422 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:19:22,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-30 19:19:22,422 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)] === [2023-08-30 19:19:22,423 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:19:22,423 INFO L85 PathProgramCache]: Analyzing trace with hash 814884584, now seen corresponding path program 1 times [2023-08-30 19:19:22,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:19:22,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136731759] [2023-08-30 19:19:22,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:19:22,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:19:22,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:19:22,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:19:22,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:19:22,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136731759] [2023-08-30 19:19:22,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136731759] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:19:22,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:19:22,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 19:19:22,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325571210] [2023-08-30 19:19:22,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:19:22,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 19:19:22,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:19:22,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 19:19:22,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 19:19:22,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 255 out of 577 [2023-08-30 19:19:22,659 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 150 transitions, 1605 flow. Second operand has 5 states, 5 states have (on average 259.0) internal successors, (1295), 5 states have internal predecessors, (1295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:22,659 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:19:22,659 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 255 of 577 [2023-08-30 19:19:22,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:19:23,382 INFO L130 PetriNetUnfolder]: 3414/5079 cut-off events. [2023-08-30 19:19:23,382 INFO L131 PetriNetUnfolder]: For 21837/21949 co-relation queries the response was YES. [2023-08-30 19:19:23,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21173 conditions, 5079 events. 3414/5079 cut-off events. For 21837/21949 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 26170 event pairs, 1510 based on Foata normal form. 22/4686 useless extension candidates. Maximal degree in co-relation 20710. Up to 3426 conditions per place. [2023-08-30 19:19:23,425 INFO L137 encePairwiseOnDemand]: 573/577 looper letters, 158 selfloop transitions, 15 changer transitions 13/187 dead transitions. [2023-08-30 19:19:23,426 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 187 transitions, 2120 flow [2023-08-30 19:19:23,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 19:19:23,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 19:19:23,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1356 transitions. [2023-08-30 19:19:23,429 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47001733102253035 [2023-08-30 19:19:23,429 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1356 transitions. [2023-08-30 19:19:23,430 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1356 transitions. [2023-08-30 19:19:23,430 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:19:23,430 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1356 transitions. [2023-08-30 19:19:23,433 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 271.2) internal successors, (1356), 5 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:23,436 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 577.0) internal successors, (3462), 6 states have internal predecessors, (3462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:23,437 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 577.0) internal successors, (3462), 6 states have internal predecessors, (3462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:23,437 INFO L175 Difference]: Start difference. First operand has 90 places, 150 transitions, 1605 flow. Second operand 5 states and 1356 transitions. [2023-08-30 19:19:23,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 187 transitions, 2120 flow [2023-08-30 19:19:23,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 187 transitions, 2059 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-08-30 19:19:23,572 INFO L231 Difference]: Finished difference. Result has 93 places, 146 transitions, 1510 flow [2023-08-30 19:19:23,572 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=577, PETRI_DIFFERENCE_MINUEND_FLOW=1552, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1510, PETRI_PLACES=93, PETRI_TRANSITIONS=146} [2023-08-30 19:19:23,573 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 55 predicate places. [2023-08-30 19:19:23,573 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 146 transitions, 1510 flow [2023-08-30 19:19:23,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 259.0) internal successors, (1295), 5 states have internal predecessors, (1295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:23,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:19:23,574 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:19:23,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-30 19:19:23,574 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)] === [2023-08-30 19:19:23,574 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:19:23,575 INFO L85 PathProgramCache]: Analyzing trace with hash 5291322, now seen corresponding path program 2 times [2023-08-30 19:19:23,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:19:23,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472036207] [2023-08-30 19:19:23,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:19:23,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:19:23,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:19:23,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:19:23,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:19:23,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472036207] [2023-08-30 19:19:23,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472036207] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:19:23,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:19:23,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 19:19:23,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441212651] [2023-08-30 19:19:23,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:19:23,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 19:19:23,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:19:23,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 19:19:23,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 19:19:23,781 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 254 out of 577 [2023-08-30 19:19:23,783 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 146 transitions, 1510 flow. Second operand has 5 states, 5 states have (on average 258.0) internal successors, (1290), 5 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:23,783 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:19:23,783 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 254 of 577 [2023-08-30 19:19:23,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:19:24,482 INFO L130 PetriNetUnfolder]: 3440/5174 cut-off events. [2023-08-30 19:19:24,482 INFO L131 PetriNetUnfolder]: For 21416/21528 co-relation queries the response was YES. [2023-08-30 19:19:24,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20999 conditions, 5174 events. 3440/5174 cut-off events. For 21416/21528 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 27344 event pairs, 1452 based on Foata normal form. 22/4765 useless extension candidates. Maximal degree in co-relation 20849. Up to 3426 conditions per place. [2023-08-30 19:19:24,516 INFO L137 encePairwiseOnDemand]: 570/577 looper letters, 172 selfloop transitions, 21 changer transitions 8/202 dead transitions. [2023-08-30 19:19:24,516 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 202 transitions, 2235 flow [2023-08-30 19:19:24,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 19:19:24,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 19:19:24,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1360 transitions. [2023-08-30 19:19:24,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4714038128249567 [2023-08-30 19:19:24,520 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1360 transitions. [2023-08-30 19:19:24,520 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1360 transitions. [2023-08-30 19:19:24,521 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:19:24,521 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1360 transitions. [2023-08-30 19:19:24,523 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 272.0) internal successors, (1360), 5 states have internal predecessors, (1360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:24,527 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 577.0) internal successors, (3462), 6 states have internal predecessors, (3462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:24,527 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 577.0) internal successors, (3462), 6 states have internal predecessors, (3462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:24,528 INFO L175 Difference]: Start difference. First operand has 93 places, 146 transitions, 1510 flow. Second operand 5 states and 1360 transitions. [2023-08-30 19:19:24,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 202 transitions, 2235 flow [2023-08-30 19:19:24,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 202 transitions, 2185 flow, removed 12 selfloop flow, removed 4 redundant places. [2023-08-30 19:19:24,675 INFO L231 Difference]: Finished difference. Result has 93 places, 150 transitions, 1561 flow [2023-08-30 19:19:24,675 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=577, PETRI_DIFFERENCE_MINUEND_FLOW=1466, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1561, PETRI_PLACES=93, PETRI_TRANSITIONS=150} [2023-08-30 19:19:24,675 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 55 predicate places. [2023-08-30 19:19:24,676 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 150 transitions, 1561 flow [2023-08-30 19:19:24,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 258.0) internal successors, (1290), 5 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:24,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:19:24,676 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:19:24,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-30 19:19:24,677 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)] === [2023-08-30 19:19:24,677 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:19:24,677 INFO L85 PathProgramCache]: Analyzing trace with hash 13829410, now seen corresponding path program 1 times [2023-08-30 19:19:24,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:19:24,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053134585] [2023-08-30 19:19:24,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:19:24,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:19:24,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:19:24,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:19:24,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:19:24,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053134585] [2023-08-30 19:19:24,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053134585] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:19:24,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:19:24,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 19:19:24,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700030991] [2023-08-30 19:19:24,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:19:24,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 19:19:24,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:19:24,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 19:19:24,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-30 19:19:24,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 251 out of 577 [2023-08-30 19:19:24,995 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 150 transitions, 1561 flow. Second operand has 6 states, 6 states have (on average 254.33333333333334) internal successors, (1526), 6 states have internal predecessors, (1526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:24,995 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:19:24,995 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 251 of 577 [2023-08-30 19:19:24,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:19:26,278 INFO L130 PetriNetUnfolder]: 6956/10082 cut-off events. [2023-08-30 19:19:26,278 INFO L131 PetriNetUnfolder]: For 40691/40998 co-relation queries the response was YES. [2023-08-30 19:19:26,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41216 conditions, 10082 events. 6956/10082 cut-off events. For 40691/40998 co-relation queries the response was YES. Maximal size of possible extension queue 533. Compared 55263 event pairs, 3164 based on Foata normal form. 78/9261 useless extension candidates. Maximal degree in co-relation 40856. Up to 3341 conditions per place. [2023-08-30 19:19:26,354 INFO L137 encePairwiseOnDemand]: 567/577 looper letters, 236 selfloop transitions, 62 changer transitions 35/334 dead transitions. [2023-08-30 19:19:26,355 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 334 transitions, 3859 flow [2023-08-30 19:19:26,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 19:19:26,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 19:19:26,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2127 transitions. [2023-08-30 19:19:26,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46078856152513 [2023-08-30 19:19:26,360 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2127 transitions. [2023-08-30 19:19:26,360 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2127 transitions. [2023-08-30 19:19:26,361 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:19:26,362 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2127 transitions. [2023-08-30 19:19:26,365 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 265.875) internal successors, (2127), 8 states have internal predecessors, (2127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:26,370 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 577.0) internal successors, (5193), 9 states have internal predecessors, (5193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:26,371 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 577.0) internal successors, (5193), 9 states have internal predecessors, (5193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:26,371 INFO L175 Difference]: Start difference. First operand has 93 places, 150 transitions, 1561 flow. Second operand 8 states and 2127 transitions. [2023-08-30 19:19:26,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 334 transitions, 3859 flow [2023-08-30 19:19:26,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 334 transitions, 3798 flow, removed 15 selfloop flow, removed 2 redundant places. [2023-08-30 19:19:26,798 INFO L231 Difference]: Finished difference. Result has 103 places, 188 transitions, 2106 flow [2023-08-30 19:19:26,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=577, PETRI_DIFFERENCE_MINUEND_FLOW=1518, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2106, PETRI_PLACES=103, PETRI_TRANSITIONS=188} [2023-08-30 19:19:26,799 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 65 predicate places. [2023-08-30 19:19:26,799 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 188 transitions, 2106 flow [2023-08-30 19:19:26,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 254.33333333333334) internal successors, (1526), 6 states have internal predecessors, (1526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:26,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:19:26,800 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:19:26,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-30 19:19:26,800 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)] === [2023-08-30 19:19:26,801 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:19:26,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1573728984, now seen corresponding path program 3 times [2023-08-30 19:19:26,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:19:26,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818528465] [2023-08-30 19:19:26,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:19:26,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:19:26,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:19:26,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:19:26,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:19:26,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818528465] [2023-08-30 19:19:26,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818528465] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:19:26,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:19:26,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 19:19:26,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062213184] [2023-08-30 19:19:26,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:19:26,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 19:19:26,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:19:26,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 19:19:26,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 19:19:27,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 254 out of 577 [2023-08-30 19:19:27,022 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 188 transitions, 2106 flow. Second operand has 5 states, 5 states have (on average 258.0) internal successors, (1290), 5 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:27,022 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:19:27,022 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 254 of 577 [2023-08-30 19:19:27,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:19:27,967 INFO L130 PetriNetUnfolder]: 6383/9340 cut-off events. [2023-08-30 19:19:27,967 INFO L131 PetriNetUnfolder]: For 36473/36755 co-relation queries the response was YES. [2023-08-30 19:19:28,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39053 conditions, 9340 events. 6383/9340 cut-off events. For 36473/36755 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 51577 event pairs, 2077 based on Foata normal form. 54/8531 useless extension candidates. Maximal degree in co-relation 38552. Up to 3528 conditions per place. [2023-08-30 19:19:28,041 INFO L137 encePairwiseOnDemand]: 567/577 looper letters, 177 selfloop transitions, 73 changer transitions 15/266 dead transitions. [2023-08-30 19:19:28,041 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 266 transitions, 3105 flow [2023-08-30 19:19:28,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 19:19:28,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 19:19:28,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1639 transitions. [2023-08-30 19:19:28,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4734257654534951 [2023-08-30 19:19:28,045 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1639 transitions. [2023-08-30 19:19:28,046 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1639 transitions. [2023-08-30 19:19:28,046 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:19:28,047 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1639 transitions. [2023-08-30 19:19:28,122 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 273.1666666666667) internal successors, (1639), 6 states have internal predecessors, (1639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:28,126 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 577.0) internal successors, (4039), 7 states have internal predecessors, (4039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:28,126 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 577.0) internal successors, (4039), 7 states have internal predecessors, (4039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:28,126 INFO L175 Difference]: Start difference. First operand has 103 places, 188 transitions, 2106 flow. Second operand 6 states and 1639 transitions. [2023-08-30 19:19:28,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 266 transitions, 3105 flow [2023-08-30 19:19:28,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 266 transitions, 2985 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-08-30 19:19:28,585 INFO L231 Difference]: Finished difference. Result has 108 places, 194 transitions, 2232 flow [2023-08-30 19:19:28,585 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=577, PETRI_DIFFERENCE_MINUEND_FLOW=2022, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2232, PETRI_PLACES=108, PETRI_TRANSITIONS=194} [2023-08-30 19:19:28,585 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 70 predicate places. [2023-08-30 19:19:28,586 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 194 transitions, 2232 flow [2023-08-30 19:19:28,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 258.0) internal successors, (1290), 5 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:28,586 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:19:28,586 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:19:28,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-30 19:19:28,588 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)] === [2023-08-30 19:19:28,588 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:19:28,588 INFO L85 PathProgramCache]: Analyzing trace with hash -1440072976, now seen corresponding path program 4 times [2023-08-30 19:19:28,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:19:28,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380762811] [2023-08-30 19:19:28,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:19:28,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:19:28,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:19:28,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:19:28,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:19:28,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380762811] [2023-08-30 19:19:28,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380762811] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:19:28,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:19:28,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 19:19:28,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189457581] [2023-08-30 19:19:28,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:19:28,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 19:19:28,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:19:28,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 19:19:28,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 19:19:28,878 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 255 out of 577 [2023-08-30 19:19:28,879 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 194 transitions, 2232 flow. Second operand has 5 states, 5 states have (on average 259.0) internal successors, (1295), 5 states have internal predecessors, (1295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:28,879 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:19:28,879 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 255 of 577 [2023-08-30 19:19:28,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:19:30,005 INFO L130 PetriNetUnfolder]: 6335/9250 cut-off events. [2023-08-30 19:19:30,005 INFO L131 PetriNetUnfolder]: For 45253/45535 co-relation queries the response was YES. [2023-08-30 19:19:30,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39110 conditions, 9250 events. 6335/9250 cut-off events. For 45253/45535 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 50805 event pairs, 2103 based on Foata normal form. 54/8503 useless extension candidates. Maximal degree in co-relation 38606. Up to 3528 conditions per place. [2023-08-30 19:19:30,070 INFO L137 encePairwiseOnDemand]: 568/577 looper letters, 167 selfloop transitions, 67 changer transitions 11/246 dead transitions. [2023-08-30 19:19:30,070 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 246 transitions, 2925 flow [2023-08-30 19:19:30,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 19:19:30,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 19:19:30,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1634 transitions. [2023-08-30 19:19:30,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4719815135759676 [2023-08-30 19:19:30,075 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1634 transitions. [2023-08-30 19:19:30,075 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1634 transitions. [2023-08-30 19:19:30,076 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:19:30,076 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1634 transitions. [2023-08-30 19:19:30,079 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 272.3333333333333) internal successors, (1634), 6 states have internal predecessors, (1634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:30,083 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 577.0) internal successors, (4039), 7 states have internal predecessors, (4039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:30,084 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 577.0) internal successors, (4039), 7 states have internal predecessors, (4039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:30,084 INFO L175 Difference]: Start difference. First operand has 108 places, 194 transitions, 2232 flow. Second operand 6 states and 1634 transitions. [2023-08-30 19:19:30,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 246 transitions, 2925 flow [2023-08-30 19:19:30,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 246 transitions, 2783 flow, removed 20 selfloop flow, removed 2 redundant places. [2023-08-30 19:19:30,563 INFO L231 Difference]: Finished difference. Result has 112 places, 192 transitions, 2190 flow [2023-08-30 19:19:30,564 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=577, PETRI_DIFFERENCE_MINUEND_FLOW=2098, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2190, PETRI_PLACES=112, PETRI_TRANSITIONS=192} [2023-08-30 19:19:30,564 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 74 predicate places. [2023-08-30 19:19:30,564 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 192 transitions, 2190 flow [2023-08-30 19:19:30,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 259.0) internal successors, (1295), 5 states have internal predecessors, (1295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:30,565 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:19:30,565 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:19:30,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-30 19:19:30,565 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)] === [2023-08-30 19:19:30,566 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:19:30,566 INFO L85 PathProgramCache]: Analyzing trace with hash -1968338174, now seen corresponding path program 5 times [2023-08-30 19:19:30,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:19:30,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760852905] [2023-08-30 19:19:30,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:19:30,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:19:30,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:19:30,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:19:30,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:19:30,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760852905] [2023-08-30 19:19:30,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760852905] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:19:30,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:19:30,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 19:19:30,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229867419] [2023-08-30 19:19:30,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:19:30,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 19:19:30,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:19:30,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 19:19:30,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 19:19:30,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 255 out of 577 [2023-08-30 19:19:30,819 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 192 transitions, 2190 flow. Second operand has 5 states, 5 states have (on average 259.0) internal successors, (1295), 5 states have internal predecessors, (1295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:30,819 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:19:30,819 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 255 of 577 [2023-08-30 19:19:30,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:19:31,831 INFO L130 PetriNetUnfolder]: 6337/9274 cut-off events. [2023-08-30 19:19:31,831 INFO L131 PetriNetUnfolder]: For 43006/43264 co-relation queries the response was YES. [2023-08-30 19:19:31,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39225 conditions, 9274 events. 6337/9274 cut-off events. For 43006/43264 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 51365 event pairs, 1251 based on Foata normal form. 117/8578 useless extension candidates. Maximal degree in co-relation 39101. Up to 2572 conditions per place. [2023-08-30 19:19:31,882 INFO L137 encePairwiseOnDemand]: 567/577 looper letters, 192 selfloop transitions, 100 changer transitions 16/309 dead transitions. [2023-08-30 19:19:31,882 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 309 transitions, 3660 flow [2023-08-30 19:19:31,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 19:19:31,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 19:19:31,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1917 transitions. [2023-08-30 19:19:31,892 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47462243129487497 [2023-08-30 19:19:31,892 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1917 transitions. [2023-08-30 19:19:31,893 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1917 transitions. [2023-08-30 19:19:31,895 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:19:31,898 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1917 transitions. [2023-08-30 19:19:31,902 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 273.85714285714283) internal successors, (1917), 7 states have internal predecessors, (1917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:31,910 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 577.0) internal successors, (4616), 8 states have internal predecessors, (4616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:31,911 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 577.0) internal successors, (4616), 8 states have internal predecessors, (4616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:31,911 INFO L175 Difference]: Start difference. First operand has 112 places, 192 transitions, 2190 flow. Second operand 7 states and 1917 transitions. [2023-08-30 19:19:31,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 309 transitions, 3660 flow [2023-08-30 19:19:32,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 309 transitions, 3514 flow, removed 6 selfloop flow, removed 5 redundant places. [2023-08-30 19:19:32,351 INFO L231 Difference]: Finished difference. Result has 113 places, 212 transitions, 2531 flow [2023-08-30 19:19:32,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=577, PETRI_DIFFERENCE_MINUEND_FLOW=2054, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2531, PETRI_PLACES=113, PETRI_TRANSITIONS=212} [2023-08-30 19:19:32,352 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 75 predicate places. [2023-08-30 19:19:32,352 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 212 transitions, 2531 flow [2023-08-30 19:19:32,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 259.0) internal successors, (1295), 5 states have internal predecessors, (1295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:32,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:19:32,353 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:19:32,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-30 19:19:32,353 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)] === [2023-08-30 19:19:32,353 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:19:32,354 INFO L85 PathProgramCache]: Analyzing trace with hash -59174180, now seen corresponding path program 6 times [2023-08-30 19:19:32,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:19:32,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587567534] [2023-08-30 19:19:32,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:19:32,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:19:32,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:19:32,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:19:32,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:19:32,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587567534] [2023-08-30 19:19:32,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587567534] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:19:32,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:19:32,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 19:19:32,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432684274] [2023-08-30 19:19:32,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:19:32,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 19:19:32,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:19:32,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 19:19:32,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 19:19:32,595 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 255 out of 577 [2023-08-30 19:19:32,596 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 212 transitions, 2531 flow. Second operand has 5 states, 5 states have (on average 259.0) internal successors, (1295), 5 states have internal predecessors, (1295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:32,596 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:19:32,596 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 255 of 577 [2023-08-30 19:19:32,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:19:33,560 INFO L130 PetriNetUnfolder]: 6301/9208 cut-off events. [2023-08-30 19:19:33,561 INFO L131 PetriNetUnfolder]: For 46796/47128 co-relation queries the response was YES. [2023-08-30 19:19:33,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40085 conditions, 9208 events. 6301/9208 cut-off events. For 46796/47128 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 50770 event pairs, 1416 based on Foata normal form. 169/8558 useless extension candidates. Maximal degree in co-relation 38357. Up to 2860 conditions per place. [2023-08-30 19:19:33,609 INFO L137 encePairwiseOnDemand]: 567/577 looper letters, 199 selfloop transitions, 105 changer transitions 8/313 dead transitions. [2023-08-30 19:19:33,609 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 313 transitions, 3919 flow [2023-08-30 19:19:33,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 19:19:33,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 19:19:33,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1912 transitions. [2023-08-30 19:19:33,614 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47338450111413716 [2023-08-30 19:19:33,614 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1912 transitions. [2023-08-30 19:19:33,614 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1912 transitions. [2023-08-30 19:19:33,615 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:19:33,615 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1912 transitions. [2023-08-30 19:19:33,619 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 273.14285714285717) internal successors, (1912), 7 states have internal predecessors, (1912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:33,623 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 577.0) internal successors, (4616), 8 states have internal predecessors, (4616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:33,624 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 577.0) internal successors, (4616), 8 states have internal predecessors, (4616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:33,624 INFO L175 Difference]: Start difference. First operand has 113 places, 212 transitions, 2531 flow. Second operand 7 states and 1912 transitions. [2023-08-30 19:19:33,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 313 transitions, 3919 flow [2023-08-30 19:19:34,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 313 transitions, 3797 flow, removed 61 selfloop flow, removed 1 redundant places. [2023-08-30 19:19:34,013 INFO L231 Difference]: Finished difference. Result has 119 places, 234 transitions, 3029 flow [2023-08-30 19:19:34,013 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=577, PETRI_DIFFERENCE_MINUEND_FLOW=2441, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3029, PETRI_PLACES=119, PETRI_TRANSITIONS=234} [2023-08-30 19:19:34,014 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 81 predicate places. [2023-08-30 19:19:34,014 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 234 transitions, 3029 flow [2023-08-30 19:19:34,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 259.0) internal successors, (1295), 5 states have internal predecessors, (1295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:34,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:19:34,015 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:19:34,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-30 19:19:34,015 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)] === [2023-08-30 19:19:34,015 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:19:34,015 INFO L85 PathProgramCache]: Analyzing trace with hash 854842974, now seen corresponding path program 1 times [2023-08-30 19:19:34,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:19:34,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219319413] [2023-08-30 19:19:34,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:19:34,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:19:34,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:19:34,146 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:19:34,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:19:34,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219319413] [2023-08-30 19:19:34,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219319413] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:19:34,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:19:34,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 19:19:34,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868142303] [2023-08-30 19:19:34,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:19:34,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 19:19:34,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:19:34,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 19:19:34,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 19:19:34,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 255 out of 577 [2023-08-30 19:19:34,190 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 234 transitions, 3029 flow. Second operand has 5 states, 5 states have (on average 259.2) internal successors, (1296), 5 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:34,190 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:19:34,191 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 255 of 577 [2023-08-30 19:19:34,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:19:35,200 INFO L130 PetriNetUnfolder]: 6557/9869 cut-off events. [2023-08-30 19:19:35,200 INFO L131 PetriNetUnfolder]: For 65396/65412 co-relation queries the response was YES. [2023-08-30 19:19:35,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44130 conditions, 9869 events. 6557/9869 cut-off events. For 65396/65412 co-relation queries the response was YES. Maximal size of possible extension queue 526. Compared 59122 event pairs, 1158 based on Foata normal form. 18/9057 useless extension candidates. Maximal degree in co-relation 42713. Up to 5492 conditions per place. [2023-08-30 19:19:35,257 INFO L137 encePairwiseOnDemand]: 571/577 looper letters, 286 selfloop transitions, 42 changer transitions 6/335 dead transitions. [2023-08-30 19:19:35,258 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 335 transitions, 4757 flow [2023-08-30 19:19:35,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 19:19:35,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 19:19:35,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1366 transitions. [2023-08-30 19:19:35,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4734835355285962 [2023-08-30 19:19:35,261 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1366 transitions. [2023-08-30 19:19:35,261 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1366 transitions. [2023-08-30 19:19:35,262 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:19:35,262 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1366 transitions. [2023-08-30 19:19:35,264 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 273.2) internal successors, (1366), 5 states have internal predecessors, (1366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:35,267 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 577.0) internal successors, (3462), 6 states have internal predecessors, (3462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:35,268 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 577.0) internal successors, (3462), 6 states have internal predecessors, (3462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:35,268 INFO L175 Difference]: Start difference. First operand has 119 places, 234 transitions, 3029 flow. Second operand 5 states and 1366 transitions. [2023-08-30 19:19:35,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 335 transitions, 4757 flow [2023-08-30 19:19:35,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 335 transitions, 4595 flow, removed 81 selfloop flow, removed 0 redundant places. [2023-08-30 19:19:35,554 INFO L231 Difference]: Finished difference. Result has 124 places, 250 transitions, 3338 flow [2023-08-30 19:19:35,555 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=577, PETRI_DIFFERENCE_MINUEND_FLOW=2871, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3338, PETRI_PLACES=124, PETRI_TRANSITIONS=250} [2023-08-30 19:19:35,555 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 86 predicate places. [2023-08-30 19:19:35,555 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 250 transitions, 3338 flow [2023-08-30 19:19:35,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 259.2) internal successors, (1296), 5 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:35,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:19:35,556 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:19:35,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-30 19:19:35,557 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)] === [2023-08-30 19:19:35,557 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:19:35,557 INFO L85 PathProgramCache]: Analyzing trace with hash 642706158, now seen corresponding path program 2 times [2023-08-30 19:19:35,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:19:35,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836630629] [2023-08-30 19:19:35,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:19:35,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:19:35,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:19:35,678 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:19:35,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:19:35,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836630629] [2023-08-30 19:19:35,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836630629] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:19:35,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:19:35,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 19:19:35,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040895739] [2023-08-30 19:19:35,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:19:35,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 19:19:35,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:19:35,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 19:19:35,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 19:19:35,748 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 254 out of 577 [2023-08-30 19:19:35,749 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 250 transitions, 3338 flow. Second operand has 5 states, 5 states have (on average 258.2) internal successors, (1291), 5 states have internal predecessors, (1291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:35,749 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:19:35,749 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 254 of 577 [2023-08-30 19:19:35,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:19:36,973 INFO L130 PetriNetUnfolder]: 6513/9608 cut-off events. [2023-08-30 19:19:36,973 INFO L131 PetriNetUnfolder]: For 69350/69612 co-relation queries the response was YES. [2023-08-30 19:19:37,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43939 conditions, 9608 events. 6513/9608 cut-off events. For 69350/69612 co-relation queries the response was YES. Maximal size of possible extension queue 517. Compared 54157 event pairs, 3196 based on Foata normal form. 34/8793 useless extension candidates. Maximal degree in co-relation 42516. Up to 7474 conditions per place. [2023-08-30 19:19:37,032 INFO L137 encePairwiseOnDemand]: 571/577 looper letters, 246 selfloop transitions, 54 changer transitions 6/307 dead transitions. [2023-08-30 19:19:37,032 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 307 transitions, 4334 flow [2023-08-30 19:19:37,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 19:19:37,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 19:19:37,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1361 transitions. [2023-08-30 19:19:37,040 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47175043327556326 [2023-08-30 19:19:37,040 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1361 transitions. [2023-08-30 19:19:37,040 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1361 transitions. [2023-08-30 19:19:37,041 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:19:37,041 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1361 transitions. [2023-08-30 19:19:37,044 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 272.2) internal successors, (1361), 5 states have internal predecessors, (1361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:37,046 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 577.0) internal successors, (3462), 6 states have internal predecessors, (3462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:37,047 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 577.0) internal successors, (3462), 6 states have internal predecessors, (3462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:37,047 INFO L175 Difference]: Start difference. First operand has 124 places, 250 transitions, 3338 flow. Second operand 5 states and 1361 transitions. [2023-08-30 19:19:37,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 307 transitions, 4334 flow [2023-08-30 19:19:37,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 307 transitions, 4312 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-08-30 19:19:37,408 INFO L231 Difference]: Finished difference. Result has 130 places, 254 transitions, 3582 flow [2023-08-30 19:19:37,408 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=577, PETRI_DIFFERENCE_MINUEND_FLOW=3322, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3582, PETRI_PLACES=130, PETRI_TRANSITIONS=254} [2023-08-30 19:19:37,409 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 92 predicate places. [2023-08-30 19:19:37,409 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 254 transitions, 3582 flow [2023-08-30 19:19:37,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 258.2) internal successors, (1291), 5 states have internal predecessors, (1291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:37,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:19:37,410 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:19:37,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-30 19:19:37,410 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)] === [2023-08-30 19:19:37,411 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:19:37,411 INFO L85 PathProgramCache]: Analyzing trace with hash -1298038294, now seen corresponding path program 3 times [2023-08-30 19:19:37,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:19:37,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322287578] [2023-08-30 19:19:37,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:19:37,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:19:37,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:19:37,617 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:19:37,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:19:37,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322287578] [2023-08-30 19:19:37,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322287578] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:19:37,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:19:37,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 19:19:37,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020219615] [2023-08-30 19:19:37,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:19:37,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 19:19:37,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:19:37,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 19:19:37,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 19:19:37,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 254 out of 577 [2023-08-30 19:19:37,663 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 254 transitions, 3582 flow. Second operand has 5 states, 5 states have (on average 258.2) internal successors, (1291), 5 states have internal predecessors, (1291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:37,664 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:19:37,664 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 254 of 577 [2023-08-30 19:19:37,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:19:38,836 INFO L130 PetriNetUnfolder]: 6449/9494 cut-off events. [2023-08-30 19:19:38,837 INFO L131 PetriNetUnfolder]: For 72494/72846 co-relation queries the response was YES. [2023-08-30 19:19:38,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44264 conditions, 9494 events. 6449/9494 cut-off events. For 72494/72846 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 53288 event pairs, 1748 based on Foata normal form. 161/8816 useless extension candidates. Maximal degree in co-relation 42792. Up to 3961 conditions per place. [2023-08-30 19:19:38,903 INFO L137 encePairwiseOnDemand]: 568/577 looper letters, 228 selfloop transitions, 92 changer transitions 7/328 dead transitions. [2023-08-30 19:19:38,903 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 328 transitions, 4666 flow [2023-08-30 19:19:38,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 19:19:38,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 19:19:38,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1634 transitions. [2023-08-30 19:19:38,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4719815135759676 [2023-08-30 19:19:38,908 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1634 transitions. [2023-08-30 19:19:38,908 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1634 transitions. [2023-08-30 19:19:38,908 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:19:38,908 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1634 transitions. [2023-08-30 19:19:38,910 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 272.3333333333333) internal successors, (1634), 6 states have internal predecessors, (1634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:38,913 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 577.0) internal successors, (4039), 7 states have internal predecessors, (4039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:38,913 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 577.0) internal successors, (4039), 7 states have internal predecessors, (4039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:38,913 INFO L175 Difference]: Start difference. First operand has 130 places, 254 transitions, 3582 flow. Second operand 6 states and 1634 transitions. [2023-08-30 19:19:38,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 328 transitions, 4666 flow [2023-08-30 19:19:39,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 328 transitions, 4618 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-30 19:19:39,332 INFO L231 Difference]: Finished difference. Result has 136 places, 269 transitions, 3976 flow [2023-08-30 19:19:39,332 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=577, PETRI_DIFFERENCE_MINUEND_FLOW=3536, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3976, PETRI_PLACES=136, PETRI_TRANSITIONS=269} [2023-08-30 19:19:39,333 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 98 predicate places. [2023-08-30 19:19:39,333 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 269 transitions, 3976 flow [2023-08-30 19:19:39,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 258.2) internal successors, (1291), 5 states have internal predecessors, (1291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:39,333 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:19:39,333 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:19:39,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-30 19:19:39,334 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)] === [2023-08-30 19:19:39,334 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:19:39,334 INFO L85 PathProgramCache]: Analyzing trace with hash 283388168, now seen corresponding path program 4 times [2023-08-30 19:19:39,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:19:39,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152566796] [2023-08-30 19:19:39,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:19:39,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:19:39,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:19:39,466 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:19:39,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:19:39,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152566796] [2023-08-30 19:19:39,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152566796] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:19:39,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:19:39,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 19:19:39,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590542724] [2023-08-30 19:19:39,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:19:39,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 19:19:39,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:19:39,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 19:19:39,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 19:19:39,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 254 out of 577 [2023-08-30 19:19:39,508 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 269 transitions, 3976 flow. Second operand has 5 states, 5 states have (on average 258.2) internal successors, (1291), 5 states have internal predecessors, (1291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:39,508 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:19:39,508 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 254 of 577 [2023-08-30 19:19:39,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:19:40,903 INFO L130 PetriNetUnfolder]: 7887/12051 cut-off events. [2023-08-30 19:19:40,903 INFO L131 PetriNetUnfolder]: For 98561/98621 co-relation queries the response was YES. [2023-08-30 19:19:40,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57310 conditions, 12051 events. 7887/12051 cut-off events. For 98561/98621 co-relation queries the response was YES. Maximal size of possible extension queue 669. Compared 76442 event pairs, 628 based on Foata normal form. 32/11005 useless extension candidates. Maximal degree in co-relation 56268. Up to 4362 conditions per place. [2023-08-30 19:19:40,992 INFO L137 encePairwiseOnDemand]: 570/577 looper letters, 388 selfloop transitions, 60 changer transitions 10/459 dead transitions. [2023-08-30 19:19:40,993 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 459 transitions, 7090 flow [2023-08-30 19:19:40,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 19:19:40,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 19:19:40,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1646 transitions. [2023-08-30 19:19:40,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4754477180820335 [2023-08-30 19:19:40,997 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1646 transitions. [2023-08-30 19:19:40,997 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1646 transitions. [2023-08-30 19:19:40,997 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:19:40,997 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1646 transitions. [2023-08-30 19:19:40,999 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 274.3333333333333) internal successors, (1646), 6 states have internal predecessors, (1646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:41,002 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 577.0) internal successors, (4039), 7 states have internal predecessors, (4039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:41,002 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 577.0) internal successors, (4039), 7 states have internal predecessors, (4039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:41,002 INFO L175 Difference]: Start difference. First operand has 136 places, 269 transitions, 3976 flow. Second operand 6 states and 1646 transitions. [2023-08-30 19:19:41,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 459 transitions, 7090 flow [2023-08-30 19:19:41,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 459 transitions, 6912 flow, removed 27 selfloop flow, removed 3 redundant places. [2023-08-30 19:19:41,424 INFO L231 Difference]: Finished difference. Result has 142 places, 294 transitions, 4499 flow [2023-08-30 19:19:41,424 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=577, PETRI_DIFFERENCE_MINUEND_FLOW=3838, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4499, PETRI_PLACES=142, PETRI_TRANSITIONS=294} [2023-08-30 19:19:41,424 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 104 predicate places. [2023-08-30 19:19:41,425 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 294 transitions, 4499 flow [2023-08-30 19:19:41,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 258.2) internal successors, (1291), 5 states have internal predecessors, (1291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:41,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:19:41,425 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:19:41,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-30 19:19:41,425 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)] === [2023-08-30 19:19:41,426 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:19:41,426 INFO L85 PathProgramCache]: Analyzing trace with hash 756027848, now seen corresponding path program 5 times [2023-08-30 19:19:41,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:19:41,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410591359] [2023-08-30 19:19:41,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:19:41,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:19:41,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:19:41,579 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:19:41,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:19:41,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410591359] [2023-08-30 19:19:41,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410591359] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:19:41,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:19:41,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 19:19:41,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714182888] [2023-08-30 19:19:41,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:19:41,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 19:19:41,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:19:41,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 19:19:41,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 19:19:41,639 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 254 out of 577 [2023-08-30 19:19:41,640 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 294 transitions, 4499 flow. Second operand has 5 states, 5 states have (on average 258.2) internal successors, (1291), 5 states have internal predecessors, (1291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:41,641 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:19:41,641 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 254 of 577 [2023-08-30 19:19:41,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:19:43,058 INFO L130 PetriNetUnfolder]: 8159/12278 cut-off events. [2023-08-30 19:19:43,058 INFO L131 PetriNetUnfolder]: For 104931/105169 co-relation queries the response was YES. [2023-08-30 19:19:43,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60457 conditions, 12278 events. 8159/12278 cut-off events. For 104931/105169 co-relation queries the response was YES. Maximal size of possible extension queue 696. Compared 75237 event pairs, 533 based on Foata normal form. 220/11335 useless extension candidates. Maximal degree in co-relation 59078. Up to 2646 conditions per place. [2023-08-30 19:19:43,150 INFO L137 encePairwiseOnDemand]: 567/577 looper letters, 326 selfloop transitions, 135 changer transitions 10/472 dead transitions. [2023-08-30 19:19:43,151 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 472 transitions, 7012 flow [2023-08-30 19:19:43,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 19:19:43,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 19:19:43,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2467 transitions. [2023-08-30 19:19:43,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47506258424802617 [2023-08-30 19:19:43,153 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2467 transitions. [2023-08-30 19:19:43,153 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2467 transitions. [2023-08-30 19:19:43,154 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:19:43,154 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2467 transitions. [2023-08-30 19:19:43,157 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 274.1111111111111) internal successors, (2467), 9 states have internal predecessors, (2467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:43,161 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 577.0) internal successors, (5770), 10 states have internal predecessors, (5770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:43,162 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 577.0) internal successors, (5770), 10 states have internal predecessors, (5770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:43,162 INFO L175 Difference]: Start difference. First operand has 142 places, 294 transitions, 4499 flow. Second operand 9 states and 2467 transitions. [2023-08-30 19:19:43,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 472 transitions, 7012 flow [2023-08-30 19:19:43,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 472 transitions, 6920 flow, removed 46 selfloop flow, removed 0 redundant places. [2023-08-30 19:19:43,924 INFO L231 Difference]: Finished difference. Result has 155 places, 303 transitions, 5014 flow [2023-08-30 19:19:43,924 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=577, PETRI_DIFFERENCE_MINUEND_FLOW=4473, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5014, PETRI_PLACES=155, PETRI_TRANSITIONS=303} [2023-08-30 19:19:43,924 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 117 predicate places. [2023-08-30 19:19:43,925 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 303 transitions, 5014 flow [2023-08-30 19:19:43,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 258.2) internal successors, (1291), 5 states have internal predecessors, (1291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:43,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:19:43,925 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:19:43,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-30 19:19:43,925 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)] === [2023-08-30 19:19:43,926 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:19:43,926 INFO L85 PathProgramCache]: Analyzing trace with hash -1833268096, now seen corresponding path program 6 times [2023-08-30 19:19:43,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:19:43,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130571177] [2023-08-30 19:19:43,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:19:43,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:19:43,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:19:44,095 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:19:44,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:19:44,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130571177] [2023-08-30 19:19:44,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130571177] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:19:44,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:19:44,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 19:19:44,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87887383] [2023-08-30 19:19:44,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:19:44,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 19:19:44,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:19:44,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 19:19:44,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 19:19:44,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 255 out of 577 [2023-08-30 19:19:44,135 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 303 transitions, 5014 flow. Second operand has 5 states, 5 states have (on average 259.2) internal successors, (1296), 5 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:44,135 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:19:44,135 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 255 of 577 [2023-08-30 19:19:44,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:19:45,613 INFO L130 PetriNetUnfolder]: 8091/12156 cut-off events. [2023-08-30 19:19:45,613 INFO L131 PetriNetUnfolder]: For 117775/117984 co-relation queries the response was YES. [2023-08-30 19:19:45,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62520 conditions, 12156 events. 8091/12156 cut-off events. For 117775/117984 co-relation queries the response was YES. Maximal size of possible extension queue 687. Compared 73720 event pairs, 1059 based on Foata normal form. 178/11167 useless extension candidates. Maximal degree in co-relation 61082. Up to 4014 conditions per place. [2023-08-30 19:19:45,715 INFO L137 encePairwiseOnDemand]: 568/577 looper letters, 235 selfloop transitions, 119 changer transitions 9/364 dead transitions. [2023-08-30 19:19:45,715 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 364 transitions, 6026 flow [2023-08-30 19:19:45,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 19:19:45,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 19:19:45,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1649 transitions. [2023-08-30 19:19:45,717 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47631426920854997 [2023-08-30 19:19:45,717 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1649 transitions. [2023-08-30 19:19:45,717 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1649 transitions. [2023-08-30 19:19:45,717 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:19:45,717 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1649 transitions. [2023-08-30 19:19:45,719 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 274.8333333333333) internal successors, (1649), 6 states have internal predecessors, (1649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:45,721 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 577.0) internal successors, (4039), 7 states have internal predecessors, (4039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:45,721 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 577.0) internal successors, (4039), 7 states have internal predecessors, (4039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:45,721 INFO L175 Difference]: Start difference. First operand has 155 places, 303 transitions, 5014 flow. Second operand 6 states and 1649 transitions. [2023-08-30 19:19:45,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 364 transitions, 6026 flow [2023-08-30 19:19:46,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 364 transitions, 5872 flow, removed 57 selfloop flow, removed 1 redundant places. [2023-08-30 19:19:46,674 INFO L231 Difference]: Finished difference. Result has 160 places, 295 transitions, 5016 flow [2023-08-30 19:19:46,674 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=577, PETRI_DIFFERENCE_MINUEND_FLOW=4862, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5016, PETRI_PLACES=160, PETRI_TRANSITIONS=295} [2023-08-30 19:19:46,674 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 122 predicate places. [2023-08-30 19:19:46,675 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 295 transitions, 5016 flow [2023-08-30 19:19:46,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 259.2) internal successors, (1296), 5 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:46,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:19:46,675 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:19:46,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-30 19:19:46,675 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)] === [2023-08-30 19:19:46,675 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:19:46,675 INFO L85 PathProgramCache]: Analyzing trace with hash 131615909, now seen corresponding path program 1 times [2023-08-30 19:19:46,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:19:46,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968050963] [2023-08-30 19:19:46,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:19:46,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:19:46,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:19:46,837 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:19:46,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:19:46,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968050963] [2023-08-30 19:19:46,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968050963] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:19:46,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:19:46,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 19:19:46,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197003298] [2023-08-30 19:19:46,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:19:46,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 19:19:46,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:19:46,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 19:19:46,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 19:19:46,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 255 out of 577 [2023-08-30 19:19:46,900 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 295 transitions, 5016 flow. Second operand has 5 states, 5 states have (on average 259.2) internal successors, (1296), 5 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:46,901 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:19:46,901 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 255 of 577 [2023-08-30 19:19:46,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:19:48,441 INFO L130 PetriNetUnfolder]: 8453/12825 cut-off events. [2023-08-30 19:19:48,441 INFO L131 PetriNetUnfolder]: For 138600/138640 co-relation queries the response was YES. [2023-08-30 19:19:48,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66967 conditions, 12825 events. 8453/12825 cut-off events. For 138600/138640 co-relation queries the response was YES. Maximal size of possible extension queue 729. Compared 80173 event pairs, 1517 based on Foata normal form. 2/11627 useless extension candidates. Maximal degree in co-relation 65501. Up to 4230 conditions per place. [2023-08-30 19:19:48,535 INFO L137 encePairwiseOnDemand]: 568/577 looper letters, 291 selfloop transitions, 118 changer transitions 7/417 dead transitions. [2023-08-30 19:19:48,536 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 417 transitions, 7121 flow [2023-08-30 19:19:48,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 19:19:48,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 19:19:48,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1913 transitions. [2023-08-30 19:19:48,537 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4736320871502847 [2023-08-30 19:19:48,537 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1913 transitions. [2023-08-30 19:19:48,538 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1913 transitions. [2023-08-30 19:19:48,538 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:19:48,538 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1913 transitions. [2023-08-30 19:19:48,539 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 273.2857142857143) internal successors, (1913), 7 states have internal predecessors, (1913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:48,541 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 577.0) internal successors, (4616), 8 states have internal predecessors, (4616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:48,541 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 577.0) internal successors, (4616), 8 states have internal predecessors, (4616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:48,541 INFO L175 Difference]: Start difference. First operand has 160 places, 295 transitions, 5016 flow. Second operand 7 states and 1913 transitions. [2023-08-30 19:19:48,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 417 transitions, 7121 flow [2023-08-30 19:19:49,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 417 transitions, 6857 flow, removed 15 selfloop flow, removed 4 redundant places. [2023-08-30 19:19:49,542 INFO L231 Difference]: Finished difference. Result has 165 places, 325 transitions, 5624 flow [2023-08-30 19:19:49,542 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=577, PETRI_DIFFERENCE_MINUEND_FLOW=4781, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5624, PETRI_PLACES=165, PETRI_TRANSITIONS=325} [2023-08-30 19:19:49,543 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 127 predicate places. [2023-08-30 19:19:49,543 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 325 transitions, 5624 flow [2023-08-30 19:19:49,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 259.2) internal successors, (1296), 5 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:49,543 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:19:49,543 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:19:49,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-08-30 19:19:49,543 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)] === [2023-08-30 19:19:49,543 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:19:49,543 INFO L85 PathProgramCache]: Analyzing trace with hash 80818935, now seen corresponding path program 2 times [2023-08-30 19:19:49,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:19:49,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509124640] [2023-08-30 19:19:49,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:19:49,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:19:49,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:19:49,696 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:19:49,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:19:49,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509124640] [2023-08-30 19:19:49,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509124640] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:19:49,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:19:49,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 19:19:49,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575691985] [2023-08-30 19:19:49,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:19:49,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 19:19:49,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:19:49,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 19:19:49,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 19:19:49,737 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 254 out of 577 [2023-08-30 19:19:49,738 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 325 transitions, 5624 flow. Second operand has 5 states, 5 states have (on average 258.2) internal successors, (1291), 5 states have internal predecessors, (1291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:49,738 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:19:49,738 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 254 of 577 [2023-08-30 19:19:49,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:19:51,810 INFO L130 PetriNetUnfolder]: 9959/15297 cut-off events. [2023-08-30 19:19:51,810 INFO L131 PetriNetUnfolder]: For 148588/148648 co-relation queries the response was YES. [2023-08-30 19:19:51,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78488 conditions, 15297 events. 9959/15297 cut-off events. For 148588/148648 co-relation queries the response was YES. Maximal size of possible extension queue 882. Compared 100431 event pairs, 489 based on Foata normal form. 32/13829 useless extension candidates. Maximal degree in co-relation 76639. Up to 4654 conditions per place. [2023-08-30 19:19:51,963 INFO L137 encePairwiseOnDemand]: 567/577 looper letters, 363 selfloop transitions, 139 changer transitions 9/512 dead transitions. [2023-08-30 19:19:51,963 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 512 transitions, 8601 flow [2023-08-30 19:19:51,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 19:19:51,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 19:19:51,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2464 transitions. [2023-08-30 19:19:51,965 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47448488349701523 [2023-08-30 19:19:51,965 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2464 transitions. [2023-08-30 19:19:51,965 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2464 transitions. [2023-08-30 19:19:51,966 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:19:51,966 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2464 transitions. [2023-08-30 19:19:51,968 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 273.77777777777777) internal successors, (2464), 9 states have internal predecessors, (2464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:51,970 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 577.0) internal successors, (5770), 10 states have internal predecessors, (5770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:51,970 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 577.0) internal successors, (5770), 10 states have internal predecessors, (5770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:51,970 INFO L175 Difference]: Start difference. First operand has 165 places, 325 transitions, 5624 flow. Second operand 9 states and 2464 transitions. [2023-08-30 19:19:51,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 512 transitions, 8601 flow [2023-08-30 19:19:53,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 512 transitions, 8455 flow, removed 36 selfloop flow, removed 3 redundant places. [2023-08-30 19:19:53,309 INFO L231 Difference]: Finished difference. Result has 174 places, 349 transitions, 6398 flow [2023-08-30 19:19:53,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=577, PETRI_DIFFERENCE_MINUEND_FLOW=5517, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6398, PETRI_PLACES=174, PETRI_TRANSITIONS=349} [2023-08-30 19:19:53,310 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 136 predicate places. [2023-08-30 19:19:53,310 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 349 transitions, 6398 flow [2023-08-30 19:19:53,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 258.2) internal successors, (1291), 5 states have internal predecessors, (1291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:53,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:19:53,311 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:19:53,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-08-30 19:19:53,311 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)] === [2023-08-30 19:19:53,311 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:19:53,311 INFO L85 PathProgramCache]: Analyzing trace with hash 1904587171, now seen corresponding path program 3 times [2023-08-30 19:19:53,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:19:53,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494034280] [2023-08-30 19:19:53,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:19:53,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:19:53,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:19:53,473 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:19:53,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:19:53,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494034280] [2023-08-30 19:19:53,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494034280] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:19:53,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:19:53,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 19:19:53,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490376526] [2023-08-30 19:19:53,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:19:53,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 19:19:53,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:19:53,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 19:19:53,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 19:19:53,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 254 out of 577 [2023-08-30 19:19:53,526 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 349 transitions, 6398 flow. Second operand has 5 states, 5 states have (on average 258.2) internal successors, (1291), 5 states have internal predecessors, (1291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:53,526 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:19:53,526 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 254 of 577 [2023-08-30 19:19:53,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:19:55,460 INFO L130 PetriNetUnfolder]: 9879/15110 cut-off events. [2023-08-30 19:19:55,461 INFO L131 PetriNetUnfolder]: For 173146/173186 co-relation queries the response was YES. [2023-08-30 19:19:55,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81278 conditions, 15110 events. 9879/15110 cut-off events. For 173146/173186 co-relation queries the response was YES. Maximal size of possible extension queue 869. Compared 98409 event pairs, 2373 based on Foata normal form. 2/13601 useless extension candidates. Maximal degree in co-relation 79525. Up to 5816 conditions per place. [2023-08-30 19:19:55,579 INFO L137 encePairwiseOnDemand]: 568/577 looper letters, 305 selfloop transitions, 114 changer transitions 7/427 dead transitions. [2023-08-30 19:19:55,580 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 427 transitions, 7704 flow [2023-08-30 19:19:55,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 19:19:55,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 19:19:55,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1905 transitions. [2023-08-30 19:19:55,581 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47165139886110424 [2023-08-30 19:19:55,581 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1905 transitions. [2023-08-30 19:19:55,582 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1905 transitions. [2023-08-30 19:19:55,582 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:19:55,582 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1905 transitions. [2023-08-30 19:19:55,583 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 272.14285714285717) internal successors, (1905), 7 states have internal predecessors, (1905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:55,585 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 577.0) internal successors, (4616), 8 states have internal predecessors, (4616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:55,585 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 577.0) internal successors, (4616), 8 states have internal predecessors, (4616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:55,585 INFO L175 Difference]: Start difference. First operand has 174 places, 349 transitions, 6398 flow. Second operand 7 states and 1905 transitions. [2023-08-30 19:19:55,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 427 transitions, 7704 flow [2023-08-30 19:19:57,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 427 transitions, 7464 flow, removed 43 selfloop flow, removed 6 redundant places. [2023-08-30 19:19:57,287 INFO L231 Difference]: Finished difference. Result has 175 places, 347 transitions, 6347 flow [2023-08-30 19:19:57,287 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=577, PETRI_DIFFERENCE_MINUEND_FLOW=6162, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=349, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6347, PETRI_PLACES=175, PETRI_TRANSITIONS=347} [2023-08-30 19:19:57,287 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 137 predicate places. [2023-08-30 19:19:57,288 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 347 transitions, 6347 flow [2023-08-30 19:19:57,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 258.2) internal successors, (1291), 5 states have internal predecessors, (1291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:57,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:19:57,288 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:19:57,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-08-30 19:19:57,288 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)] === [2023-08-30 19:19:57,288 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:19:57,288 INFO L85 PathProgramCache]: Analyzing trace with hash -682005771, now seen corresponding path program 4 times [2023-08-30 19:19:57,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:19:57,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749302670] [2023-08-30 19:19:57,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:19:57,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:19:57,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:19:57,408 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:19:57,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:19:57,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749302670] [2023-08-30 19:19:57,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749302670] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:19:57,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:19:57,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 19:19:57,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652449979] [2023-08-30 19:19:57,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:19:57,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 19:19:57,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:19:57,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 19:19:57,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 19:19:57,453 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 254 out of 577 [2023-08-30 19:19:57,454 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 347 transitions, 6347 flow. Second operand has 5 states, 5 states have (on average 258.2) internal successors, (1291), 5 states have internal predecessors, (1291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:57,454 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:19:57,454 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 254 of 577 [2023-08-30 19:19:57,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:19:59,307 INFO L130 PetriNetUnfolder]: 9795/14976 cut-off events. [2023-08-30 19:19:59,308 INFO L131 PetriNetUnfolder]: For 167056/167096 co-relation queries the response was YES. [2023-08-30 19:19:59,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80289 conditions, 14976 events. 9795/14976 cut-off events. For 167056/167096 co-relation queries the response was YES. Maximal size of possible extension queue 858. Compared 97696 event pairs, 4087 based on Foata normal form. 2/13477 useless extension candidates. Maximal degree in co-relation 78344. Up to 11523 conditions per place. [2023-08-30 19:19:59,429 INFO L137 encePairwiseOnDemand]: 571/577 looper letters, 337 selfloop transitions, 41 changer transitions 7/386 dead transitions. [2023-08-30 19:19:59,430 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 386 transitions, 7291 flow [2023-08-30 19:19:59,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 19:19:59,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 19:19:59,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1357 transitions. [2023-08-30 19:19:59,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4703639514731369 [2023-08-30 19:19:59,431 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1357 transitions. [2023-08-30 19:19:59,431 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1357 transitions. [2023-08-30 19:19:59,431 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:19:59,431 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1357 transitions. [2023-08-30 19:19:59,432 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 271.4) internal successors, (1357), 5 states have internal predecessors, (1357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:59,434 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 577.0) internal successors, (3462), 6 states have internal predecessors, (3462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:59,434 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 577.0) internal successors, (3462), 6 states have internal predecessors, (3462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:59,434 INFO L175 Difference]: Start difference. First operand has 175 places, 347 transitions, 6347 flow. Second operand 5 states and 1357 transitions. [2023-08-30 19:19:59,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 386 transitions, 7291 flow [2023-08-30 19:20:01,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 386 transitions, 7093 flow, removed 11 selfloop flow, removed 4 redundant places. [2023-08-30 19:20:01,113 INFO L231 Difference]: Finished difference. Result has 176 places, 341 transitions, 6169 flow [2023-08-30 19:20:01,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=577, PETRI_DIFFERENCE_MINUEND_FLOW=6151, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=6169, PETRI_PLACES=176, PETRI_TRANSITIONS=341} [2023-08-30 19:20:01,114 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 138 predicate places. [2023-08-30 19:20:01,114 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 341 transitions, 6169 flow [2023-08-30 19:20:01,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 258.2) internal successors, (1291), 5 states have internal predecessors, (1291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:20:01,115 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:20:01,115 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:20:01,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-08-30 19:20:01,116 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)] === [2023-08-30 19:20:01,116 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:20:01,116 INFO L85 PathProgramCache]: Analyzing trace with hash 1818172119, now seen corresponding path program 5 times [2023-08-30 19:20:01,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:20:01,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651760598] [2023-08-30 19:20:01,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:20:01,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:20:01,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:20:01,263 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:20:01,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:20:01,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651760598] [2023-08-30 19:20:01,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651760598] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:20:01,264 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:20:01,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 19:20:01,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483938343] [2023-08-30 19:20:01,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:20:01,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 19:20:01,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:20:01,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 19:20:01,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 19:20:01,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 254 out of 577 [2023-08-30 19:20:01,306 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 341 transitions, 6169 flow. Second operand has 5 states, 5 states have (on average 258.2) internal successors, (1291), 5 states have internal predecessors, (1291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:20:01,306 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:20:01,307 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 254 of 577 [2023-08-30 19:20:01,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:20:03,369 INFO L130 PetriNetUnfolder]: 11230/16980 cut-off events. [2023-08-30 19:20:03,369 INFO L131 PetriNetUnfolder]: For 167599/167819 co-relation queries the response was YES. [2023-08-30 19:20:03,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89532 conditions, 16980 events. 11230/16980 cut-off events. For 167599/167819 co-relation queries the response was YES. Maximal size of possible extension queue 944. Compared 109985 event pairs, 578 based on Foata normal form. 162/15412 useless extension candidates. Maximal degree in co-relation 87838. Up to 4031 conditions per place. [2023-08-30 19:20:03,565 INFO L137 encePairwiseOnDemand]: 567/577 looper letters, 364 selfloop transitions, 161 changer transitions 9/535 dead transitions. [2023-08-30 19:20:03,566 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 535 transitions, 9069 flow [2023-08-30 19:20:03,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 19:20:03,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 19:20:03,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2476 transitions. [2023-08-30 19:20:03,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47679568650105913 [2023-08-30 19:20:03,568 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2476 transitions. [2023-08-30 19:20:03,568 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2476 transitions. [2023-08-30 19:20:03,568 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:20:03,569 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2476 transitions. [2023-08-30 19:20:03,570 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 275.1111111111111) internal successors, (2476), 9 states have internal predecessors, (2476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:20:03,573 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 577.0) internal successors, (5770), 10 states have internal predecessors, (5770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:20:03,573 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 577.0) internal successors, (5770), 10 states have internal predecessors, (5770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:20:03,573 INFO L175 Difference]: Start difference. First operand has 176 places, 341 transitions, 6169 flow. Second operand 9 states and 2476 transitions. [2023-08-30 19:20:03,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 535 transitions, 9069 flow [2023-08-30 19:20:05,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 535 transitions, 8872 flow, removed 11 selfloop flow, removed 5 redundant places. [2023-08-30 19:20:05,780 INFO L231 Difference]: Finished difference. Result has 184 places, 352 transitions, 6716 flow [2023-08-30 19:20:05,780 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=577, PETRI_DIFFERENCE_MINUEND_FLOW=5990, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6716, PETRI_PLACES=184, PETRI_TRANSITIONS=352} [2023-08-30 19:20:05,781 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 146 predicate places. [2023-08-30 19:20:05,781 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 352 transitions, 6716 flow [2023-08-30 19:20:05,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 258.2) internal successors, (1291), 5 states have internal predecessors, (1291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:20:05,781 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:20:05,782 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:20:05,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-08-30 19:20:05,782 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)] === [2023-08-30 19:20:05,783 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:20:05,783 INFO L85 PathProgramCache]: Analyzing trace with hash 1469416541, now seen corresponding path program 6 times [2023-08-30 19:20:05,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:20:05,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45896046] [2023-08-30 19:20:05,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:20:05,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:20:05,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:20:05,936 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:20:05,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:20:05,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45896046] [2023-08-30 19:20:05,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45896046] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:20:05,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:20:05,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 19:20:05,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911729844] [2023-08-30 19:20:05,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:20:05,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 19:20:05,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:20:05,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 19:20:05,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 19:20:05,972 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 255 out of 577 [2023-08-30 19:20:05,973 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 352 transitions, 6716 flow. Second operand has 5 states, 5 states have (on average 259.2) internal successors, (1296), 5 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:20:05,973 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:20:05,973 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 255 of 577 [2023-08-30 19:20:05,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:20:07,994 INFO L130 PetriNetUnfolder]: 11150/16888 cut-off events. [2023-08-30 19:20:07,994 INFO L131 PetriNetUnfolder]: For 194768/194808 co-relation queries the response was YES. [2023-08-30 19:20:08,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92204 conditions, 16888 events. 11150/16888 cut-off events. For 194768/194808 co-relation queries the response was YES. Maximal size of possible extension queue 940. Compared 109110 event pairs, 1635 based on Foata normal form. 32/15157 useless extension candidates. Maximal degree in co-relation 90233. Up to 6892 conditions per place. [2023-08-30 19:20:08,160 INFO L137 encePairwiseOnDemand]: 568/577 looper letters, 266 selfloop transitions, 131 changer transitions 8/406 dead transitions. [2023-08-30 19:20:08,160 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 406 transitions, 7731 flow [2023-08-30 19:20:08,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 19:20:08,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 19:20:08,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1650 transitions. [2023-08-30 19:20:08,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47660311958405543 [2023-08-30 19:20:08,162 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1650 transitions. [2023-08-30 19:20:08,163 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1650 transitions. [2023-08-30 19:20:08,163 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:20:08,163 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1650 transitions. [2023-08-30 19:20:08,165 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 275.0) internal successors, (1650), 6 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:20:08,167 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 577.0) internal successors, (4039), 7 states have internal predecessors, (4039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:20:08,167 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 577.0) internal successors, (4039), 7 states have internal predecessors, (4039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:20:08,167 INFO L175 Difference]: Start difference. First operand has 184 places, 352 transitions, 6716 flow. Second operand 6 states and 1650 transitions. [2023-08-30 19:20:08,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 406 transitions, 7731 flow [2023-08-30 19:20:10,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 406 transitions, 7398 flow, removed 66 selfloop flow, removed 5 redundant places. [2023-08-30 19:20:10,761 INFO L231 Difference]: Finished difference. Result has 185 places, 345 transitions, 6624 flow [2023-08-30 19:20:10,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=577, PETRI_DIFFERENCE_MINUEND_FLOW=6393, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6624, PETRI_PLACES=185, PETRI_TRANSITIONS=345} [2023-08-30 19:20:10,762 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 147 predicate places. [2023-08-30 19:20:10,762 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 345 transitions, 6624 flow [2023-08-30 19:20:10,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 259.2) internal successors, (1296), 5 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:20:10,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:20:10,762 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] [2023-08-30 19:20:10,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-08-30 19:20:10,762 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)] === [2023-08-30 19:20:10,763 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:20:10,763 INFO L85 PathProgramCache]: Analyzing trace with hash -1605622237, now seen corresponding path program 1 times [2023-08-30 19:20:10,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:20:10,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233794311] [2023-08-30 19:20:10,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:20:10,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:20:10,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:20:10,842 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:20:10,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:20:10,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233794311] [2023-08-30 19:20:10,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233794311] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:20:10,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:20:10,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 19:20:10,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968641644] [2023-08-30 19:20:10,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:20:10,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 19:20:10,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:20:10,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 19:20:10,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 19:20:10,872 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 260 out of 577 [2023-08-30 19:20:10,873 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 345 transitions, 6624 flow. Second operand has 4 states, 4 states have (on average 265.5) internal successors, (1062), 4 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:20:10,873 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:20:10,874 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 260 of 577 [2023-08-30 19:20:10,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:20:12,909 INFO L130 PetriNetUnfolder]: 10897/16469 cut-off events. [2023-08-30 19:20:12,910 INFO L131 PetriNetUnfolder]: For 196656/196728 co-relation queries the response was YES. [2023-08-30 19:20:12,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90794 conditions, 16469 events. 10897/16469 cut-off events. For 196656/196728 co-relation queries the response was YES. Maximal size of possible extension queue 914. Compared 106633 event pairs, 4059 based on Foata normal form. 115/14850 useless extension candidates. Maximal degree in co-relation 89203. Up to 11167 conditions per place. [2023-08-30 19:20:13,037 INFO L137 encePairwiseOnDemand]: 572/577 looper letters, 335 selfloop transitions, 58 changer transitions 12/406 dead transitions. [2023-08-30 19:20:13,037 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 406 transitions, 7659 flow [2023-08-30 19:20:13,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 19:20:13,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 19:20:13,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1402 transitions. [2023-08-30 19:20:13,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48596187175043326 [2023-08-30 19:20:13,039 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1402 transitions. [2023-08-30 19:20:13,039 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1402 transitions. [2023-08-30 19:20:13,039 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:20:13,039 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1402 transitions. [2023-08-30 19:20:13,041 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 280.4) internal successors, (1402), 5 states have internal predecessors, (1402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:20:13,042 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 577.0) internal successors, (3462), 6 states have internal predecessors, (3462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:20:13,043 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 577.0) internal successors, (3462), 6 states have internal predecessors, (3462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:20:13,043 INFO L175 Difference]: Start difference. First operand has 185 places, 345 transitions, 6624 flow. Second operand 5 states and 1402 transitions. [2023-08-30 19:20:13,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 406 transitions, 7659 flow [2023-08-30 19:20:15,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 406 transitions, 7357 flow, removed 12 selfloop flow, removed 5 redundant places. [2023-08-30 19:20:15,015 INFO L231 Difference]: Finished difference. Result has 184 places, 336 transitions, 6250 flow [2023-08-30 19:20:15,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=577, PETRI_DIFFERENCE_MINUEND_FLOW=6186, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=6250, PETRI_PLACES=184, PETRI_TRANSITIONS=336} [2023-08-30 19:20:15,015 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 146 predicate places. [2023-08-30 19:20:15,016 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 336 transitions, 6250 flow [2023-08-30 19:20:15,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 265.5) internal successors, (1062), 4 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:20:15,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:20:15,016 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] [2023-08-30 19:20:15,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-08-30 19:20:15,016 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)] === [2023-08-30 19:20:15,017 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:20:15,017 INFO L85 PathProgramCache]: Analyzing trace with hash 850364479, now seen corresponding path program 2 times [2023-08-30 19:20:15,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:20:15,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773391911] [2023-08-30 19:20:15,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:20:15,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:20:15,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:20:15,085 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:20:15,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:20:15,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773391911] [2023-08-30 19:20:15,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773391911] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:20:15,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:20:15,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 19:20:15,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619858101] [2023-08-30 19:20:15,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:20:15,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 19:20:15,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:20:15,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 19:20:15,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 19:20:15,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 260 out of 577 [2023-08-30 19:20:15,118 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 336 transitions, 6250 flow. Second operand has 4 states, 4 states have (on average 265.5) internal successors, (1062), 4 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:20:15,118 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:20:15,118 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 260 of 577 [2023-08-30 19:20:15,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:20:17,014 INFO L130 PetriNetUnfolder]: 10411/15584 cut-off events. [2023-08-30 19:20:17,014 INFO L131 PetriNetUnfolder]: For 169053/169125 co-relation queries the response was YES. [2023-08-30 19:20:17,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84588 conditions, 15584 events. 10411/15584 cut-off events. For 169053/169125 co-relation queries the response was YES. Maximal size of possible extension queue 840. Compared 98281 event pairs, 4281 based on Foata normal form. 56/13982 useless extension candidates. Maximal degree in co-relation 84536. Up to 11437 conditions per place. [2023-08-30 19:20:17,128 INFO L137 encePairwiseOnDemand]: 572/577 looper letters, 302 selfloop transitions, 58 changer transitions 9/370 dead transitions. [2023-08-30 19:20:17,129 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 370 transitions, 6861 flow [2023-08-30 19:20:17,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 19:20:17,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 19:20:17,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1399 transitions. [2023-08-30 19:20:17,130 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48492201039861355 [2023-08-30 19:20:17,130 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1399 transitions. [2023-08-30 19:20:17,130 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1399 transitions. [2023-08-30 19:20:17,130 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:20:17,130 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1399 transitions. [2023-08-30 19:20:17,132 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 279.8) internal successors, (1399), 5 states have internal predecessors, (1399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:20:17,133 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 577.0) internal successors, (3462), 6 states have internal predecessors, (3462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:20:17,133 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 577.0) internal successors, (3462), 6 states have internal predecessors, (3462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:20:17,133 INFO L175 Difference]: Start difference. First operand has 184 places, 336 transitions, 6250 flow. Second operand 5 states and 1399 transitions. [2023-08-30 19:20:17,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 370 transitions, 6861 flow [2023-08-30 19:20:18,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 370 transitions, 6668 flow, removed 37 selfloop flow, removed 9 redundant places. [2023-08-30 19:20:18,800 INFO L231 Difference]: Finished difference. Result has 173 places, 305 transitions, 5571 flow [2023-08-30 19:20:18,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=577, PETRI_DIFFERENCE_MINUEND_FLOW=5611, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=5571, PETRI_PLACES=173, PETRI_TRANSITIONS=305} [2023-08-30 19:20:18,801 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 135 predicate places. [2023-08-30 19:20:18,801 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 305 transitions, 5571 flow [2023-08-30 19:20:18,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 265.5) internal successors, (1062), 4 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:20:18,802 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:20:18,802 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] [2023-08-30 19:20:18,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-08-30 19:20:18,802 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)] === [2023-08-30 19:20:18,802 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:20:18,803 INFO L85 PathProgramCache]: Analyzing trace with hash -1976073599, now seen corresponding path program 3 times [2023-08-30 19:20:18,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:20:18,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644242392] [2023-08-30 19:20:18,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:20:18,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:20:18,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:20:18,872 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:20:18,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:20:18,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644242392] [2023-08-30 19:20:18,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644242392] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:20:18,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:20:18,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 19:20:18,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150650489] [2023-08-30 19:20:18,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:20:18,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 19:20:18,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:20:18,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 19:20:18,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 19:20:18,900 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 259 out of 577 [2023-08-30 19:20:18,901 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 305 transitions, 5571 flow. Second operand has 4 states, 4 states have (on average 264.5) internal successors, (1058), 4 states have internal predecessors, (1058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:20:18,901 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:20:18,901 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 259 of 577 [2023-08-30 19:20:18,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:20:20,458 INFO L130 PetriNetUnfolder]: 9959/14938 cut-off events. [2023-08-30 19:20:20,458 INFO L131 PetriNetUnfolder]: For 154976/155084 co-relation queries the response was YES. [2023-08-30 19:20:20,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79755 conditions, 14938 events. 9959/14938 cut-off events. For 154976/155084 co-relation queries the response was YES. Maximal size of possible extension queue 802. Compared 94348 event pairs, 1999 based on Foata normal form. 138/13494 useless extension candidates. Maximal degree in co-relation 79707. Up to 9520 conditions per place. [2023-08-30 19:20:20,555 INFO L137 encePairwiseOnDemand]: 571/577 looper letters, 255 selfloop transitions, 60 changer transitions 19/335 dead transitions. [2023-08-30 19:20:20,555 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 335 transitions, 6253 flow [2023-08-30 19:20:20,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 19:20:20,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 19:20:20,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1375 transitions. [2023-08-30 19:20:20,559 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47660311958405543 [2023-08-30 19:20:20,559 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1375 transitions. [2023-08-30 19:20:20,559 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1375 transitions. [2023-08-30 19:20:20,559 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:20:20,559 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1375 transitions. [2023-08-30 19:20:20,561 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 275.0) internal successors, (1375), 5 states have internal predecessors, (1375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:20:20,562 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 577.0) internal successors, (3462), 6 states have internal predecessors, (3462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:20:20,563 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 577.0) internal successors, (3462), 6 states have internal predecessors, (3462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:20:20,563 INFO L175 Difference]: Start difference. First operand has 173 places, 305 transitions, 5571 flow. Second operand 5 states and 1375 transitions. [2023-08-30 19:20:20,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 335 transitions, 6253 flow [2023-08-30 19:20:21,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 335 transitions, 6120 flow, removed 6 selfloop flow, removed 4 redundant places. [2023-08-30 19:20:21,764 INFO L231 Difference]: Finished difference. Result has 170 places, 284 transitions, 5054 flow [2023-08-30 19:20:21,765 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=577, PETRI_DIFFERENCE_MINUEND_FLOW=5226, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=5054, PETRI_PLACES=170, PETRI_TRANSITIONS=284} [2023-08-30 19:20:21,765 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 132 predicate places. [2023-08-30 19:20:21,765 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 284 transitions, 5054 flow [2023-08-30 19:20:21,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 264.5) internal successors, (1058), 4 states have internal predecessors, (1058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:20:21,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:20:21,766 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] [2023-08-30 19:20:21,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2023-08-30 19:20:21,766 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)] === [2023-08-30 19:20:21,766 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:20:21,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1082399877, now seen corresponding path program 4 times [2023-08-30 19:20:21,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:20:21,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383934751] [2023-08-30 19:20:21,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:20:21,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:20:21,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:20:21,831 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:20:21,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:20:21,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383934751] [2023-08-30 19:20:21,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383934751] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:20:21,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:20:21,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 19:20:21,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573526287] [2023-08-30 19:20:21,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:20:21,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 19:20:21,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:20:21,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 19:20:21,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 19:20:21,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 261 out of 577 [2023-08-30 19:20:21,854 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 284 transitions, 5054 flow. Second operand has 4 states, 4 states have (on average 266.5) internal successors, (1066), 4 states have internal predecessors, (1066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:20:21,854 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:20:21,854 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 261 of 577 [2023-08-30 19:20:21,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:20:23,352 INFO L130 PetriNetUnfolder]: 9579/14325 cut-off events. [2023-08-30 19:20:23,353 INFO L131 PetriNetUnfolder]: For 145773/146073 co-relation queries the response was YES. [2023-08-30 19:20:23,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74699 conditions, 14325 events. 9579/14325 cut-off events. For 145773/146073 co-relation queries the response was YES. Maximal size of possible extension queue 784. Compared 89478 event pairs, 2186 based on Foata normal form. 220/12993 useless extension candidates. Maximal degree in co-relation 74652. Up to 12526 conditions per place. [2023-08-30 19:20:23,462 INFO L137 encePairwiseOnDemand]: 573/577 looper letters, 275 selfloop transitions, 29 changer transitions 0/305 dead transitions. [2023-08-30 19:20:23,462 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 305 transitions, 5633 flow [2023-08-30 19:20:23,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 19:20:23,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 19:20:23,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1117 transitions. [2023-08-30 19:20:23,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48396880415944543 [2023-08-30 19:20:23,463 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1117 transitions. [2023-08-30 19:20:23,463 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1117 transitions. [2023-08-30 19:20:23,464 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:20:23,464 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1117 transitions. [2023-08-30 19:20:23,465 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 279.25) internal successors, (1117), 4 states have internal predecessors, (1117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:20:23,466 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 577.0) internal successors, (2885), 5 states have internal predecessors, (2885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:20:23,467 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 577.0) internal successors, (2885), 5 states have internal predecessors, (2885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:20:23,467 INFO L175 Difference]: Start difference. First operand has 170 places, 284 transitions, 5054 flow. Second operand 4 states and 1117 transitions. [2023-08-30 19:20:23,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 305 transitions, 5633 flow [2023-08-30 19:20:24,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 305 transitions, 5548 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-08-30 19:20:24,493 INFO L231 Difference]: Finished difference. Result has 172 places, 278 transitions, 4878 flow [2023-08-30 19:20:24,494 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=577, PETRI_DIFFERENCE_MINUEND_FLOW=4734, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=4878, PETRI_PLACES=172, PETRI_TRANSITIONS=278} [2023-08-30 19:20:24,494 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 134 predicate places. [2023-08-30 19:20:24,494 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 278 transitions, 4878 flow [2023-08-30 19:20:24,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 266.5) internal successors, (1066), 4 states have internal predecessors, (1066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:20:24,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:20:24,494 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:20:24,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2023-08-30 19:20:24,495 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 19:20:24,495 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:20:24,495 INFO L85 PathProgramCache]: Analyzing trace with hash -241854389, now seen corresponding path program 5 times [2023-08-30 19:20:24,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:20:24,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048236729] [2023-08-30 19:20:24,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:20:24,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:20:24,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:20:24,573 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:20:24,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:20:24,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048236729] [2023-08-30 19:20:24,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048236729] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:20:24,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:20:24,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 19:20:24,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105683396] [2023-08-30 19:20:24,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:20:24,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 19:20:24,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:20:24,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 19:20:24,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 19:20:24,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 259 out of 577 [2023-08-30 19:20:24,597 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 278 transitions, 4878 flow. Second operand has 4 states, 4 states have (on average 264.5) internal successors, (1058), 4 states have internal predecessors, (1058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:20:24,597 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:20:24,597 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 259 of 577 [2023-08-30 19:20:24,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:20:25,996 INFO L130 PetriNetUnfolder]: 9019/13384 cut-off events. [2023-08-30 19:20:25,996 INFO L131 PetriNetUnfolder]: For 132016/132216 co-relation queries the response was YES. [2023-08-30 19:20:26,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71851 conditions, 13384 events. 9019/13384 cut-off events. For 132016/132216 co-relation queries the response was YES. Maximal size of possible extension queue 714. Compared 81235 event pairs, 1727 based on Foata normal form. 154/12093 useless extension candidates. Maximal degree in co-relation 71802. Up to 9552 conditions per place. [2023-08-30 19:20:26,096 INFO L137 encePairwiseOnDemand]: 571/577 looper letters, 248 selfloop transitions, 48 changer transitions 9/306 dead transitions. [2023-08-30 19:20:26,096 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 306 transitions, 5393 flow [2023-08-30 19:20:26,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 19:20:26,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 19:20:26,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1377 transitions. [2023-08-30 19:20:26,098 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47729636048526863 [2023-08-30 19:20:26,099 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1377 transitions. [2023-08-30 19:20:26,099 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1377 transitions. [2023-08-30 19:20:26,099 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:20:26,099 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1377 transitions. [2023-08-30 19:20:26,101 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 275.4) internal successors, (1377), 5 states have internal predecessors, (1377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:20:26,103 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 577.0) internal successors, (3462), 6 states have internal predecessors, (3462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:20:26,103 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 577.0) internal successors, (3462), 6 states have internal predecessors, (3462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:20:26,103 INFO L175 Difference]: Start difference. First operand has 172 places, 278 transitions, 4878 flow. Second operand 5 states and 1377 transitions. [2023-08-30 19:20:26,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 306 transitions, 5393 flow [2023-08-30 19:20:27,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 306 transitions, 5137 flow, removed 7 selfloop flow, removed 8 redundant places. [2023-08-30 19:20:27,134 INFO L231 Difference]: Finished difference. Result has 166 places, 255 transitions, 4222 flow [2023-08-30 19:20:27,135 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=577, PETRI_DIFFERENCE_MINUEND_FLOW=4315, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=4222, PETRI_PLACES=166, PETRI_TRANSITIONS=255} [2023-08-30 19:20:27,135 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 128 predicate places. [2023-08-30 19:20:27,135 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 255 transitions, 4222 flow [2023-08-30 19:20:27,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 264.5) internal successors, (1058), 4 states have internal predecessors, (1058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:20:27,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:20:27,136 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] [2023-08-30 19:20:27,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2023-08-30 19:20:27,136 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 19:20:27,137 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:20:27,137 INFO L85 PathProgramCache]: Analyzing trace with hash -647602329, now seen corresponding path program 6 times [2023-08-30 19:20:27,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:20:27,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715694309] [2023-08-30 19:20:27,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:20:27,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:20:27,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:20:27,207 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:20:27,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:20:27,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715694309] [2023-08-30 19:20:27,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715694309] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:20:27,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:20:27,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 19:20:27,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859322] [2023-08-30 19:20:27,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:20:27,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 19:20:27,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:20:27,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 19:20:27,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 19:20:27,238 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 261 out of 577 [2023-08-30 19:20:27,239 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 255 transitions, 4222 flow. Second operand has 4 states, 4 states have (on average 266.5) internal successors, (1066), 4 states have internal predecessors, (1066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:20:27,239 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:20:27,239 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 261 of 577 [2023-08-30 19:20:27,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:20:28,601 INFO L130 PetriNetUnfolder]: 8631/12816 cut-off events. [2023-08-30 19:20:28,601 INFO L131 PetriNetUnfolder]: For 112778/112978 co-relation queries the response was YES. [2023-08-30 19:20:28,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66638 conditions, 12816 events. 8631/12816 cut-off events. For 112778/112978 co-relation queries the response was YES. Maximal size of possible extension queue 682. Compared 77683 event pairs, 2092 based on Foata normal form. 245/11650 useless extension candidates. Maximal degree in co-relation 66592. Up to 11854 conditions per place. [2023-08-30 19:20:28,696 INFO L137 encePairwiseOnDemand]: 573/577 looper letters, 231 selfloop transitions, 22 changer transitions 0/254 dead transitions. [2023-08-30 19:20:28,696 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 254 transitions, 4449 flow [2023-08-30 19:20:28,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 19:20:28,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 19:20:28,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1108 transitions. [2023-08-30 19:20:28,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4800693240901213 [2023-08-30 19:20:28,697 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1108 transitions. [2023-08-30 19:20:28,698 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1108 transitions. [2023-08-30 19:20:28,698 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:20:28,698 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1108 transitions. [2023-08-30 19:20:28,699 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 277.0) internal successors, (1108), 4 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:20:28,700 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 577.0) internal successors, (2885), 5 states have internal predecessors, (2885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:20:28,700 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 577.0) internal successors, (2885), 5 states have internal predecessors, (2885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:20:28,700 INFO L175 Difference]: Start difference. First operand has 166 places, 255 transitions, 4222 flow. Second operand 4 states and 1108 transitions. [2023-08-30 19:20:28,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 254 transitions, 4449 flow [2023-08-30 19:20:29,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 254 transitions, 4146 flow, removed 24 selfloop flow, removed 9 redundant places. [2023-08-30 19:20:29,300 INFO L231 Difference]: Finished difference. Result has 154 places, 235 transitions, 3543 flow [2023-08-30 19:20:29,300 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=577, PETRI_DIFFERENCE_MINUEND_FLOW=3499, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=3543, PETRI_PLACES=154, PETRI_TRANSITIONS=235} [2023-08-30 19:20:29,300 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 116 predicate places. [2023-08-30 19:20:29,300 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 235 transitions, 3543 flow [2023-08-30 19:20:29,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 266.5) internal successors, (1066), 4 states have internal predecessors, (1066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:20:29,301 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:20:29,301 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] [2023-08-30 19:20:29,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2023-08-30 19:20:29,301 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 19:20:29,301 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:20:29,301 INFO L85 PathProgramCache]: Analyzing trace with hash 417802368, now seen corresponding path program 1 times [2023-08-30 19:20:29,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:20:29,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055931497] [2023-08-30 19:20:29,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:20:29,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:20:29,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:20:29,373 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:20:29,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:20:29,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055931497] [2023-08-30 19:20:29,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055931497] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:20:29,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:20:29,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 19:20:29,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389013252] [2023-08-30 19:20:29,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:20:29,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 19:20:29,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:20:29,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 19:20:29,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 19:20:29,404 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 261 out of 577 [2023-08-30 19:20:29,405 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 235 transitions, 3543 flow. Second operand has 4 states, 4 states have (on average 266.5) internal successors, (1066), 4 states have internal predecessors, (1066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:20:29,405 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:20:29,405 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 261 of 577 [2023-08-30 19:20:29,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:20:30,478 INFO L130 PetriNetUnfolder]: 8527/12771 cut-off events. [2023-08-30 19:20:30,478 INFO L131 PetriNetUnfolder]: For 87265/87325 co-relation queries the response was YES. [2023-08-30 19:20:30,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63324 conditions, 12771 events. 8527/12771 cut-off events. For 87265/87325 co-relation queries the response was YES. Maximal size of possible extension queue 687. Compared 78281 event pairs, 1180 based on Foata normal form. 96/11441 useless extension candidates. Maximal degree in co-relation 63285. Up to 10420 conditions per place. [2023-08-30 19:20:30,568 INFO L137 encePairwiseOnDemand]: 573/577 looper letters, 247 selfloop transitions, 27 changer transitions 0/275 dead transitions. [2023-08-30 19:20:30,568 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 275 transitions, 4343 flow [2023-08-30 19:20:30,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 19:20:30,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 19:20:30,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1113 transitions. [2023-08-30 19:20:30,570 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48223570190641246 [2023-08-30 19:20:30,570 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1113 transitions. [2023-08-30 19:20:30,570 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1113 transitions. [2023-08-30 19:20:30,570 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:20:30,570 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1113 transitions. [2023-08-30 19:20:30,571 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 278.25) internal successors, (1113), 4 states have internal predecessors, (1113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:20:30,572 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 577.0) internal successors, (2885), 5 states have internal predecessors, (2885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:20:30,572 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 577.0) internal successors, (2885), 5 states have internal predecessors, (2885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:20:30,572 INFO L175 Difference]: Start difference. First operand has 154 places, 235 transitions, 3543 flow. Second operand 4 states and 1113 transitions. [2023-08-30 19:20:30,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 275 transitions, 4343 flow [2023-08-30 19:20:30,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 275 transitions, 4272 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-08-30 19:20:30,956 INFO L231 Difference]: Finished difference. Result has 156 places, 231 transitions, 3467 flow [2023-08-30 19:20:30,956 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=577, PETRI_DIFFERENCE_MINUEND_FLOW=3335, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=3467, PETRI_PLACES=156, PETRI_TRANSITIONS=231} [2023-08-30 19:20:30,957 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 118 predicate places. [2023-08-30 19:20:30,957 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 231 transitions, 3467 flow [2023-08-30 19:20:30,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 266.5) internal successors, (1066), 4 states have internal predecessors, (1066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:20:30,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:20:30,958 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] [2023-08-30 19:20:30,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2023-08-30 19:20:30,958 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 19:20:30,958 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:20:30,958 INFO L85 PathProgramCache]: Analyzing trace with hash 26060358, now seen corresponding path program 2 times [2023-08-30 19:20:30,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:20:30,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531775667] [2023-08-30 19:20:30,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:20:30,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:20:30,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:20:31,020 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:20:31,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:20:31,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531775667] [2023-08-30 19:20:31,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531775667] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:20:31,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:20:31,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 19:20:31,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912553254] [2023-08-30 19:20:31,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:20:31,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 19:20:31,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:20:31,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 19:20:31,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 19:20:31,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 260 out of 577 [2023-08-30 19:20:31,043 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 231 transitions, 3467 flow. Second operand has 4 states, 4 states have (on average 265.5) internal successors, (1062), 4 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:20:31,043 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:20:31,043 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 260 of 577 [2023-08-30 19:20:31,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:20:32,150 INFO L130 PetriNetUnfolder]: 7919/11805 cut-off events. [2023-08-30 19:20:32,150 INFO L131 PetriNetUnfolder]: For 90378/90418 co-relation queries the response was YES. [2023-08-30 19:20:32,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58930 conditions, 11805 events. 7919/11805 cut-off events. For 90378/90418 co-relation queries the response was YES. Maximal size of possible extension queue 622. Compared 70417 event pairs, 3180 based on Foata normal form. 115/10582 useless extension candidates. Maximal degree in co-relation 58891. Up to 8644 conditions per place. [2023-08-30 19:20:32,229 INFO L137 encePairwiseOnDemand]: 572/577 looper letters, 244 selfloop transitions, 26 changer transitions 13/284 dead transitions. [2023-08-30 19:20:32,229 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 284 transitions, 4144 flow [2023-08-30 19:20:32,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 19:20:32,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 19:20:32,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1398 transitions. [2023-08-30 19:20:32,230 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4845753899480069 [2023-08-30 19:20:32,230 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1398 transitions. [2023-08-30 19:20:32,231 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1398 transitions. [2023-08-30 19:20:32,231 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:20:32,231 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1398 transitions. [2023-08-30 19:20:32,232 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 279.6) internal successors, (1398), 5 states have internal predecessors, (1398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:20:32,235 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 577.0) internal successors, (3462), 6 states have internal predecessors, (3462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:20:32,236 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 577.0) internal successors, (3462), 6 states have internal predecessors, (3462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:20:32,236 INFO L175 Difference]: Start difference. First operand has 156 places, 231 transitions, 3467 flow. Second operand 5 states and 1398 transitions. [2023-08-30 19:20:32,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 284 transitions, 4144 flow [2023-08-30 19:20:32,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 284 transitions, 4131 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 19:20:32,553 INFO L231 Difference]: Finished difference. Result has 155 places, 216 transitions, 3224 flow [2023-08-30 19:20:32,553 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=577, PETRI_DIFFERENCE_MINUEND_FLOW=3322, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3224, PETRI_PLACES=155, PETRI_TRANSITIONS=216} [2023-08-30 19:20:32,554 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 117 predicate places. [2023-08-30 19:20:32,554 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 216 transitions, 3224 flow [2023-08-30 19:20:32,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 265.5) internal successors, (1062), 4 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:20:32,554 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:20:32,555 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] [2023-08-30 19:20:32,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2023-08-30 19:20:32,555 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 19:20:32,555 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:20:32,555 INFO L85 PathProgramCache]: Analyzing trace with hash -1214310244, now seen corresponding path program 3 times [2023-08-30 19:20:32,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:20:32,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514091106] [2023-08-30 19:20:32,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:20:32,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:20:32,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:20:32,625 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:20:32,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:20:32,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514091106] [2023-08-30 19:20:32,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514091106] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:20:32,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:20:32,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 19:20:32,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784850448] [2023-08-30 19:20:32,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:20:32,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 19:20:32,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:20:32,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 19:20:32,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 19:20:32,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 259 out of 577 [2023-08-30 19:20:32,655 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 216 transitions, 3224 flow. Second operand has 4 states, 4 states have (on average 264.5) internal successors, (1058), 4 states have internal predecessors, (1058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:20:32,655 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:20:32,656 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 259 of 577 [2023-08-30 19:20:32,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:20:33,577 INFO L130 PetriNetUnfolder]: 7151/10497 cut-off events. [2023-08-30 19:20:33,577 INFO L131 PetriNetUnfolder]: For 81943/82003 co-relation queries the response was YES. [2023-08-30 19:20:33,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54151 conditions, 10497 events. 7151/10497 cut-off events. For 81943/82003 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 59484 event pairs, 1036 based on Foata normal form. 90/9417 useless extension candidates. Maximal degree in co-relation 54112. Up to 8284 conditions per place. [2023-08-30 19:20:33,657 INFO L137 encePairwiseOnDemand]: 572/577 looper letters, 196 selfloop transitions, 23 changer transitions 10/230 dead transitions. [2023-08-30 19:20:33,657 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 230 transitions, 3538 flow [2023-08-30 19:20:33,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 19:20:33,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 19:20:33,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1108 transitions. [2023-08-30 19:20:33,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4800693240901213 [2023-08-30 19:20:33,660 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1108 transitions. [2023-08-30 19:20:33,660 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1108 transitions. [2023-08-30 19:20:33,660 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:20:33,660 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1108 transitions. [2023-08-30 19:20:33,661 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 277.0) internal successors, (1108), 4 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:20:33,662 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 577.0) internal successors, (2885), 5 states have internal predecessors, (2885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:20:33,662 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 577.0) internal successors, (2885), 5 states have internal predecessors, (2885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:20:33,662 INFO L175 Difference]: Start difference. First operand has 155 places, 216 transitions, 3224 flow. Second operand 4 states and 1108 transitions. [2023-08-30 19:20:33,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 230 transitions, 3538 flow [2023-08-30 19:20:33,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 230 transitions, 3385 flow, removed 9 selfloop flow, removed 7 redundant places. [2023-08-30 19:20:33,972 INFO L231 Difference]: Finished difference. Result has 146 places, 192 transitions, 2685 flow [2023-08-30 19:20:33,973 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=577, PETRI_DIFFERENCE_MINUEND_FLOW=2821, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2685, PETRI_PLACES=146, PETRI_TRANSITIONS=192} [2023-08-30 19:20:33,973 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 108 predicate places. [2023-08-30 19:20:33,973 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 192 transitions, 2685 flow [2023-08-30 19:20:33,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 264.5) internal successors, (1058), 4 states have internal predecessors, (1058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:20:33,974 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:20:33,974 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] [2023-08-30 19:20:33,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2023-08-30 19:20:33,974 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 19:20:33,974 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:20:33,974 INFO L85 PathProgramCache]: Analyzing trace with hash -752652904, now seen corresponding path program 4 times [2023-08-30 19:20:33,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:20:33,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801852224] [2023-08-30 19:20:33,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:20:33,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:20:33,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:20:34,039 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:20:34,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:20:34,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801852224] [2023-08-30 19:20:34,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801852224] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:20:34,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:20:34,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 19:20:34,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684025061] [2023-08-30 19:20:34,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:20:34,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 19:20:34,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:20:34,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 19:20:34,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 19:20:34,062 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 261 out of 577 [2023-08-30 19:20:34,063 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 192 transitions, 2685 flow. Second operand has 4 states, 4 states have (on average 266.5) internal successors, (1066), 4 states have internal predecessors, (1066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:20:34,063 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:20:34,063 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 261 of 577 [2023-08-30 19:20:34,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:20:34,952 INFO L130 PetriNetUnfolder]: 6713/9835 cut-off events. [2023-08-30 19:20:34,952 INFO L131 PetriNetUnfolder]: For 64392/64412 co-relation queries the response was YES. [2023-08-30 19:20:34,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48997 conditions, 9835 events. 6713/9835 cut-off events. For 64392/64412 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 55070 event pairs, 1134 based on Foata normal form. 144/8849 useless extension candidates. Maximal degree in co-relation 48961. Up to 8872 conditions per place. [2023-08-30 19:20:35,002 INFO L137 encePairwiseOnDemand]: 573/577 looper letters, 185 selfloop transitions, 17 changer transitions 0/203 dead transitions. [2023-08-30 19:20:35,002 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 203 transitions, 2978 flow [2023-08-30 19:20:35,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 19:20:35,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 19:20:35,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1108 transitions. [2023-08-30 19:20:35,005 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4800693240901213 [2023-08-30 19:20:35,005 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1108 transitions. [2023-08-30 19:20:35,005 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1108 transitions. [2023-08-30 19:20:35,005 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:20:35,006 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1108 transitions. [2023-08-30 19:20:35,007 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 277.0) internal successors, (1108), 4 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:20:35,008 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 577.0) internal successors, (2885), 5 states have internal predecessors, (2885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:20:35,008 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 577.0) internal successors, (2885), 5 states have internal predecessors, (2885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:20:35,008 INFO L175 Difference]: Start difference. First operand has 146 places, 192 transitions, 2685 flow. Second operand 4 states and 1108 transitions. [2023-08-30 19:20:35,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 203 transitions, 2978 flow [2023-08-30 19:20:35,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 203 transitions, 2655 flow, removed 4 selfloop flow, removed 14 redundant places. [2023-08-30 19:20:35,134 INFO L231 Difference]: Finished difference. Result has 129 places, 174 transitions, 2125 flow [2023-08-30 19:20:35,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=577, PETRI_DIFFERENCE_MINUEND_FLOW=2091, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2125, PETRI_PLACES=129, PETRI_TRANSITIONS=174} [2023-08-30 19:20:35,134 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 91 predicate places. [2023-08-30 19:20:35,134 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 174 transitions, 2125 flow [2023-08-30 19:20:35,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 266.5) internal successors, (1066), 4 states have internal predecessors, (1066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:20:35,135 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:20:35,135 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] [2023-08-30 19:20:35,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2023-08-30 19:20:35,135 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 19:20:35,135 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:20:35,136 INFO L85 PathProgramCache]: Analyzing trace with hash 869502642, now seen corresponding path program 1 times [2023-08-30 19:20:35,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:20:35,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340592282] [2023-08-30 19:20:35,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:20:35,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:20:35,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:20:35,278 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:20:35,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:20:35,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340592282] [2023-08-30 19:20:35,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340592282] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:20:35,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087247813] [2023-08-30 19:20:35,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:20:35,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:20:35,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:20:35,285 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) [2023-08-30 19:20:35,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-30 19:20:35,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:20:35,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 19:20:35,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:20:35,626 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:20:35,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:20:35,737 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:20:35,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087247813] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 19:20:35,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-30 19:20:35,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 13 [2023-08-30 19:20:35,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193788351] [2023-08-30 19:20:35,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:20:35,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 19:20:35,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:20:35,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 19:20:35,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2023-08-30 19:20:35,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 245 out of 577 [2023-08-30 19:20:35,965 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 174 transitions, 2125 flow. Second operand has 7 states, 7 states have (on average 248.28571428571428) internal successors, (1738), 7 states have internal predecessors, (1738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:20:35,965 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:20:35,965 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 245 of 577 [2023-08-30 19:20:35,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:20:37,189 INFO L130 PetriNetUnfolder]: 8125/12111 cut-off events. [2023-08-30 19:20:37,189 INFO L131 PetriNetUnfolder]: For 63557/63566 co-relation queries the response was YES. [2023-08-30 19:20:37,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55810 conditions, 12111 events. 8125/12111 cut-off events. For 63557/63566 co-relation queries the response was YES. Maximal size of possible extension queue 533. Compared 72245 event pairs, 1514 based on Foata normal form. 104/10915 useless extension candidates. Maximal degree in co-relation 55780. Up to 4332 conditions per place. [2023-08-30 19:20:37,282 INFO L137 encePairwiseOnDemand]: 567/577 looper letters, 534 selfloop transitions, 29 changer transitions 0/564 dead transitions. [2023-08-30 19:20:37,282 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 564 transitions, 8226 flow [2023-08-30 19:20:37,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 19:20:37,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 19:20:37,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2610 transitions. [2023-08-30 19:20:37,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45233968804159447 [2023-08-30 19:20:37,285 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2610 transitions. [2023-08-30 19:20:37,285 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2610 transitions. [2023-08-30 19:20:37,285 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:20:37,286 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2610 transitions. [2023-08-30 19:20:37,288 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 261.0) internal successors, (2610), 10 states have internal predecessors, (2610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:20:37,291 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 577.0) internal successors, (6347), 11 states have internal predecessors, (6347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:20:37,291 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 577.0) internal successors, (6347), 11 states have internal predecessors, (6347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:20:37,291 INFO L175 Difference]: Start difference. First operand has 129 places, 174 transitions, 2125 flow. Second operand 10 states and 2610 transitions. [2023-08-30 19:20:37,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 564 transitions, 8226 flow [2023-08-30 19:20:37,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 564 transitions, 8132 flow, removed 8 selfloop flow, removed 2 redundant places. [2023-08-30 19:20:37,422 INFO L231 Difference]: Finished difference. Result has 138 places, 196 transitions, 2488 flow [2023-08-30 19:20:37,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=577, PETRI_DIFFERENCE_MINUEND_FLOW=2101, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2488, PETRI_PLACES=138, PETRI_TRANSITIONS=196} [2023-08-30 19:20:37,423 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 100 predicate places. [2023-08-30 19:20:37,423 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 196 transitions, 2488 flow [2023-08-30 19:20:37,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 248.28571428571428) internal successors, (1738), 7 states have internal predecessors, (1738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:20:37,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:20:37,423 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] [2023-08-30 19:20:37,432 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-30 19:20:37,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-08-30 19:20:37,629 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 19:20:37,629 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:20:37,629 INFO L85 PathProgramCache]: Analyzing trace with hash 1284664047, now seen corresponding path program 1 times [2023-08-30 19:20:37,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:20:37,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26098257] [2023-08-30 19:20:37,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:20:37,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:20:37,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:20:37,712 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:20:37,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:20:37,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26098257] [2023-08-30 19:20:37,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26098257] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:20:37,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:20:37,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 19:20:37,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996980961] [2023-08-30 19:20:37,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:20:37,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 19:20:37,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:20:37,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 19:20:37,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 19:20:37,845 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 254 out of 577 [2023-08-30 19:20:37,845 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 196 transitions, 2488 flow. Second operand has 5 states, 5 states have (on average 259.0) internal successors, (1295), 5 states have internal predecessors, (1295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:20:37,846 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:20:37,846 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 254 of 577 [2023-08-30 19:20:37,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:20:38,707 INFO L130 PetriNetUnfolder]: 5157/7984 cut-off events. [2023-08-30 19:20:38,707 INFO L131 PetriNetUnfolder]: For 41344/41420 co-relation queries the response was YES. [2023-08-30 19:20:38,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39652 conditions, 7984 events. 5157/7984 cut-off events. For 41344/41420 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 46068 event pairs, 2348 based on Foata normal form. 470/7922 useless extension candidates. Maximal degree in co-relation 39621. Up to 5958 conditions per place. [2023-08-30 19:20:38,754 INFO L137 encePairwiseOnDemand]: 569/577 looper letters, 169 selfloop transitions, 2 changer transitions 204/376 dead transitions. [2023-08-30 19:20:38,754 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 376 transitions, 5714 flow [2023-08-30 19:20:38,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 19:20:38,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 19:20:38,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1888 transitions. [2023-08-30 19:20:38,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4674424362465957 [2023-08-30 19:20:38,756 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1888 transitions. [2023-08-30 19:20:38,756 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1888 transitions. [2023-08-30 19:20:38,757 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:20:38,757 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1888 transitions. [2023-08-30 19:20:38,759 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 269.7142857142857) internal successors, (1888), 7 states have internal predecessors, (1888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:20:38,761 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 577.0) internal successors, (4616), 8 states have internal predecessors, (4616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:20:38,761 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 577.0) internal successors, (4616), 8 states have internal predecessors, (4616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:20:38,762 INFO L175 Difference]: Start difference. First operand has 138 places, 196 transitions, 2488 flow. Second operand 7 states and 1888 transitions. [2023-08-30 19:20:38,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 376 transitions, 5714 flow [2023-08-30 19:20:38,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 376 transitions, 5704 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-30 19:20:38,900 INFO L231 Difference]: Finished difference. Result has 143 places, 172 transitions, 2342 flow [2023-08-30 19:20:38,900 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=577, PETRI_DIFFERENCE_MINUEND_FLOW=2316, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2342, PETRI_PLACES=143, PETRI_TRANSITIONS=172} [2023-08-30 19:20:38,900 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 105 predicate places. [2023-08-30 19:20:38,900 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 172 transitions, 2342 flow [2023-08-30 19:20:38,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 259.0) internal successors, (1295), 5 states have internal predecessors, (1295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:20:38,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:20:38,901 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] [2023-08-30 19:20:38,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2023-08-30 19:20:38,901 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 19:20:38,902 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:20:38,902 INFO L85 PathProgramCache]: Analyzing trace with hash -2120518970, now seen corresponding path program 1 times [2023-08-30 19:20:38,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:20:38,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564083884] [2023-08-30 19:20:38,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:20:38,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:20:38,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:20:38,974 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:20:38,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:20:38,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564083884] [2023-08-30 19:20:38,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564083884] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:20:38,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:20:38,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 19:20:38,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988901668] [2023-08-30 19:20:38,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:20:38,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 19:20:38,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:20:38,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 19:20:38,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 19:20:39,062 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 254 out of 577 [2023-08-30 19:20:39,063 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 172 transitions, 2342 flow. Second operand has 5 states, 5 states have (on average 258.8) internal successors, (1294), 5 states have internal predecessors, (1294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:20:39,063 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:20:39,063 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 254 of 577 [2023-08-30 19:20:39,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:20:39,584 INFO L130 PetriNetUnfolder]: 3144/4869 cut-off events. [2023-08-30 19:20:39,585 INFO L131 PetriNetUnfolder]: For 28257/28274 co-relation queries the response was YES. [2023-08-30 19:20:39,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25023 conditions, 4869 events. 3144/4869 cut-off events. For 28257/28274 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 26084 event pairs, 1286 based on Foata normal form. 364/5016 useless extension candidates. Maximal degree in co-relation 24990. Up to 3247 conditions per place. [2023-08-30 19:20:39,606 INFO L137 encePairwiseOnDemand]: 571/577 looper letters, 128 selfloop transitions, 2 changer transitions 157/288 dead transitions. [2023-08-30 19:20:39,606 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 288 transitions, 4131 flow [2023-08-30 19:20:39,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 19:20:39,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 19:20:39,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1892 transitions. [2023-08-30 19:20:39,608 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4684327803911859 [2023-08-30 19:20:39,608 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1892 transitions. [2023-08-30 19:20:39,608 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1892 transitions. [2023-08-30 19:20:39,609 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:20:39,609 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1892 transitions. [2023-08-30 19:20:39,610 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 270.2857142857143) internal successors, (1892), 7 states have internal predecessors, (1892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:20:39,611 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 577.0) internal successors, (4616), 8 states have internal predecessors, (4616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:20:39,612 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 577.0) internal successors, (4616), 8 states have internal predecessors, (4616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:20:39,612 INFO L175 Difference]: Start difference. First operand has 143 places, 172 transitions, 2342 flow. Second operand 7 states and 1892 transitions. [2023-08-30 19:20:39,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 288 transitions, 4131 flow [2023-08-30 19:20:39,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 288 transitions, 3995 flow, removed 43 selfloop flow, removed 8 redundant places. [2023-08-30 19:20:39,686 INFO L231 Difference]: Finished difference. Result has 134 places, 131 transitions, 1639 flow [2023-08-30 19:20:39,686 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=577, PETRI_DIFFERENCE_MINUEND_FLOW=1962, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1639, PETRI_PLACES=134, PETRI_TRANSITIONS=131} [2023-08-30 19:20:39,687 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 96 predicate places. [2023-08-30 19:20:39,687 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 131 transitions, 1639 flow [2023-08-30 19:20:39,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 258.8) internal successors, (1294), 5 states have internal predecessors, (1294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:20:39,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:20:39,687 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] [2023-08-30 19:20:39,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2023-08-30 19:20:39,688 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 19:20:39,688 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:20:39,688 INFO L85 PathProgramCache]: Analyzing trace with hash -1482106300, now seen corresponding path program 1 times [2023-08-30 19:20:39,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:20:39,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171916615] [2023-08-30 19:20:39,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:20:39,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:20:39,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:20:39,759 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 19:20:39,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:20:39,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171916615] [2023-08-30 19:20:39,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171916615] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:20:39,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:20:39,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 19:20:39,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793999954] [2023-08-30 19:20:39,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:20:39,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 19:20:39,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:20:39,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 19:20:39,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 19:20:39,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 261 out of 577 [2023-08-30 19:20:39,787 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 131 transitions, 1639 flow. Second operand has 4 states, 4 states have (on average 267.25) internal successors, (1069), 4 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:20:39,787 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:20:39,788 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 261 of 577 [2023-08-30 19:20:39,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:20:40,086 INFO L130 PetriNetUnfolder]: 2143/3238 cut-off events. [2023-08-30 19:20:40,086 INFO L131 PetriNetUnfolder]: For 15723/15749 co-relation queries the response was YES. [2023-08-30 19:20:40,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15229 conditions, 3238 events. 2143/3238 cut-off events. For 15723/15749 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 15382 event pairs, 240 based on Foata normal form. 96/3128 useless extension candidates. Maximal degree in co-relation 15198. Up to 2367 conditions per place. [2023-08-30 19:20:40,103 INFO L137 encePairwiseOnDemand]: 573/577 looper letters, 142 selfloop transitions, 13 changer transitions 0/156 dead transitions. [2023-08-30 19:20:40,103 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 156 transitions, 1991 flow [2023-08-30 19:20:40,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 19:20:40,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 19:20:40,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1116 transitions. [2023-08-30 19:20:40,105 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48353552859618715 [2023-08-30 19:20:40,105 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1116 transitions. [2023-08-30 19:20:40,105 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1116 transitions. [2023-08-30 19:20:40,105 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:20:40,105 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1116 transitions. [2023-08-30 19:20:40,106 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 279.0) internal successors, (1116), 4 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:20:40,107 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 577.0) internal successors, (2885), 5 states have internal predecessors, (2885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:20:40,107 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 577.0) internal successors, (2885), 5 states have internal predecessors, (2885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:20:40,107 INFO L175 Difference]: Start difference. First operand has 134 places, 131 transitions, 1639 flow. Second operand 4 states and 1116 transitions. [2023-08-30 19:20:40,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 156 transitions, 1991 flow [2023-08-30 19:20:40,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 156 transitions, 1902 flow, removed 17 selfloop flow, removed 9 redundant places. [2023-08-30 19:20:40,166 INFO L231 Difference]: Finished difference. Result has 121 places, 127 transitions, 1514 flow [2023-08-30 19:20:40,166 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=577, PETRI_DIFFERENCE_MINUEND_FLOW=1488, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1514, PETRI_PLACES=121, PETRI_TRANSITIONS=127} [2023-08-30 19:20:40,167 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 83 predicate places. [2023-08-30 19:20:40,167 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 127 transitions, 1514 flow [2023-08-30 19:20:40,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 267.25) internal successors, (1069), 4 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:20:40,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:20:40,167 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] [2023-08-30 19:20:40,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2023-08-30 19:20:40,168 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 19:20:40,168 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:20:40,168 INFO L85 PathProgramCache]: Analyzing trace with hash -859998328, now seen corresponding path program 2 times [2023-08-30 19:20:40,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:20:40,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335806380] [2023-08-30 19:20:40,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:20:40,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:20:40,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:20:40,235 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 19:20:40,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:20:40,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335806380] [2023-08-30 19:20:40,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335806380] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:20:40,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:20:40,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 19:20:40,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713494568] [2023-08-30 19:20:40,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:20:40,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 19:20:40,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:20:40,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 19:20:40,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 19:20:40,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 261 out of 577 [2023-08-30 19:20:40,260 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 127 transitions, 1514 flow. Second operand has 4 states, 4 states have (on average 267.25) internal successors, (1069), 4 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:20:40,260 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:20:40,260 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 261 of 577 [2023-08-30 19:20:40,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:20:40,596 INFO L130 PetriNetUnfolder]: 1949/2965 cut-off events. [2023-08-30 19:20:40,596 INFO L131 PetriNetUnfolder]: For 12820/12856 co-relation queries the response was YES. [2023-08-30 19:20:40,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12978 conditions, 2965 events. 1949/2965 cut-off events. For 12820/12856 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 13969 event pairs, 139 based on Foata normal form. 98/2875 useless extension candidates. Maximal degree in co-relation 12952. Up to 2351 conditions per place. [2023-08-30 19:20:40,615 INFO L137 encePairwiseOnDemand]: 573/577 looper letters, 132 selfloop transitions, 13 changer transitions 0/146 dead transitions. [2023-08-30 19:20:40,616 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 146 transitions, 1799 flow [2023-08-30 19:20:40,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 19:20:40,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 19:20:40,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1114 transitions. [2023-08-30 19:20:40,618 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4826689774696707 [2023-08-30 19:20:40,618 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1114 transitions. [2023-08-30 19:20:40,618 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1114 transitions. [2023-08-30 19:20:40,618 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:20:40,618 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1114 transitions. [2023-08-30 19:20:40,619 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 278.5) internal successors, (1114), 4 states have internal predecessors, (1114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:20:40,621 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 577.0) internal successors, (2885), 5 states have internal predecessors, (2885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:20:40,621 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 577.0) internal successors, (2885), 5 states have internal predecessors, (2885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:20:40,621 INFO L175 Difference]: Start difference. First operand has 121 places, 127 transitions, 1514 flow. Second operand 4 states and 1114 transitions. [2023-08-30 19:20:40,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 146 transitions, 1799 flow [2023-08-30 19:20:40,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 146 transitions, 1586 flow, removed 6 selfloop flow, removed 11 redundant places. [2023-08-30 19:20:40,652 INFO L231 Difference]: Finished difference. Result has 106 places, 115 transitions, 1191 flow [2023-08-30 19:20:40,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=577, PETRI_DIFFERENCE_MINUEND_FLOW=1165, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1191, PETRI_PLACES=106, PETRI_TRANSITIONS=115} [2023-08-30 19:20:40,653 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 68 predicate places. [2023-08-30 19:20:40,654 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 115 transitions, 1191 flow [2023-08-30 19:20:40,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 267.25) internal successors, (1069), 4 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:20:40,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:20:40,654 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:20:40,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2023-08-30 19:20:40,654 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 19:20:40,655 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:20:40,655 INFO L85 PathProgramCache]: Analyzing trace with hash -1984418969, now seen corresponding path program 1 times [2023-08-30 19:20:40,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:20:40,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886235808] [2023-08-30 19:20:40,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:20:40,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:20:40,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:20:40,944 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 19:20:40,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:20:40,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886235808] [2023-08-30 19:20:40,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886235808] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:20:40,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341299782] [2023-08-30 19:20:40,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:20:40,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:20:40,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:20:40,947 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) [2023-08-30 19:20:40,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-30 19:20:41,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:20:41,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-30 19:20:41,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:20:41,397 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:20:41,398 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 108 treesize of output 73 [2023-08-30 19:20:41,434 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 19:20:41,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:20:41,569 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:20:41,571 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 113 treesize of output 109 [2023-08-30 19:20:41,852 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 19:20:41,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341299782] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 19:20:41,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-30 19:20:41,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7, 8] total 20 [2023-08-30 19:20:41,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490149780] [2023-08-30 19:20:41,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:20:41,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 19:20:41,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:20:41,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 19:20:41,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2023-08-30 19:20:42,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 232 out of 577 [2023-08-30 19:20:42,267 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 115 transitions, 1191 flow. Second operand has 10 states, 10 states have (on average 234.6) internal successors, (2346), 10 states have internal predecessors, (2346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:20:42,267 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:20:42,267 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 232 of 577 [2023-08-30 19:20:42,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:20:43,085 INFO L130 PetriNetUnfolder]: 4022/6160 cut-off events. [2023-08-30 19:20:43,085 INFO L131 PetriNetUnfolder]: For 18962/18982 co-relation queries the response was YES. [2023-08-30 19:20:43,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24482 conditions, 6160 events. 4022/6160 cut-off events. For 18962/18982 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 33946 event pairs, 890 based on Foata normal form. 8/5793 useless extension candidates. Maximal degree in co-relation 24461. Up to 1908 conditions per place. [2023-08-30 19:20:43,114 INFO L137 encePairwiseOnDemand]: 565/577 looper letters, 200 selfloop transitions, 67 changer transitions 59/327 dead transitions. [2023-08-30 19:20:43,114 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 327 transitions, 3726 flow [2023-08-30 19:20:43,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 19:20:43,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 19:20:43,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2698 transitions. [2023-08-30 19:20:43,116 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42508271624389476 [2023-08-30 19:20:43,117 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2698 transitions. [2023-08-30 19:20:43,117 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2698 transitions. [2023-08-30 19:20:43,117 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:20:43,117 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2698 transitions. [2023-08-30 19:20:43,119 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 245.27272727272728) internal successors, (2698), 11 states have internal predecessors, (2698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:20:43,123 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 577.0) internal successors, (6924), 12 states have internal predecessors, (6924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:20:43,123 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 577.0) internal successors, (6924), 12 states have internal predecessors, (6924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:20:43,123 INFO L175 Difference]: Start difference. First operand has 106 places, 115 transitions, 1191 flow. Second operand 11 states and 2698 transitions. [2023-08-30 19:20:43,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 327 transitions, 3726 flow [2023-08-30 19:20:43,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 327 transitions, 3712 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 19:20:43,166 INFO L231 Difference]: Finished difference. Result has 119 places, 149 transitions, 1727 flow [2023-08-30 19:20:43,167 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=577, PETRI_DIFFERENCE_MINUEND_FLOW=1186, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1727, PETRI_PLACES=119, PETRI_TRANSITIONS=149} [2023-08-30 19:20:43,167 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 81 predicate places. [2023-08-30 19:20:43,167 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 149 transitions, 1727 flow [2023-08-30 19:20:43,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 234.6) internal successors, (2346), 10 states have internal predecessors, (2346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:20:43,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:20:43,168 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:20:43,180 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-30 19:20:43,372 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,SelfDestructingSolverStorable41 [2023-08-30 19:20:43,373 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 19:20:43,373 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:20:43,373 INFO L85 PathProgramCache]: Analyzing trace with hash 261685965, now seen corresponding path program 2 times [2023-08-30 19:20:43,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:20:43,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565869267] [2023-08-30 19:20:43,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:20:43,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:20:43,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:20:43,630 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 19:20:43,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:20:43,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565869267] [2023-08-30 19:20:43,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565869267] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:20:43,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820375089] [2023-08-30 19:20:43,631 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 19:20:43,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:20:43,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:20:43,632 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) [2023-08-30 19:20:43,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-30 19:20:43,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 19:20:43,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:20:43,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-30 19:20:43,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:20:43,992 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 19:20:43,993 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 19:20:43,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820375089] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:20:43,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 19:20:43,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7] total 15 [2023-08-30 19:20:43,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725338985] [2023-08-30 19:20:43,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:20:43,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 19:20:43,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:20:43,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 19:20:43,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2023-08-30 19:20:44,296 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 238 out of 577 [2023-08-30 19:20:44,298 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 149 transitions, 1727 flow. Second operand has 10 states, 10 states have (on average 240.6) internal successors, (2406), 10 states have internal predecessors, (2406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:20:44,298 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:20:44,298 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 238 of 577 [2023-08-30 19:20:44,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:20:45,048 INFO L130 PetriNetUnfolder]: 3744/5766 cut-off events. [2023-08-30 19:20:45,048 INFO L131 PetriNetUnfolder]: For 20179/20199 co-relation queries the response was YES. [2023-08-30 19:20:45,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24230 conditions, 5766 events. 3744/5766 cut-off events. For 20179/20199 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 31181 event pairs, 706 based on Foata normal form. 39/5420 useless extension candidates. Maximal degree in co-relation 24205. Up to 1605 conditions per place. [2023-08-30 19:20:45,070 INFO L137 encePairwiseOnDemand]: 565/577 looper letters, 217 selfloop transitions, 58 changer transitions 35/311 dead transitions. [2023-08-30 19:20:45,070 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 311 transitions, 3603 flow [2023-08-30 19:20:45,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-30 19:20:45,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-30 19:20:45,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 3262 transitions. [2023-08-30 19:20:45,072 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43487534995333954 [2023-08-30 19:20:45,072 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 3262 transitions. [2023-08-30 19:20:45,072 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 3262 transitions. [2023-08-30 19:20:45,073 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:20:45,073 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 3262 transitions. [2023-08-30 19:20:45,075 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 250.92307692307693) internal successors, (3262), 13 states have internal predecessors, (3262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:20:45,078 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 577.0) internal successors, (8078), 14 states have internal predecessors, (8078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:20:45,078 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 577.0) internal successors, (8078), 14 states have internal predecessors, (8078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:20:45,078 INFO L175 Difference]: Start difference. First operand has 119 places, 149 transitions, 1727 flow. Second operand 13 states and 3262 transitions. [2023-08-30 19:20:45,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 311 transitions, 3603 flow [2023-08-30 19:20:45,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 311 transitions, 3504 flow, removed 20 selfloop flow, removed 5 redundant places. [2023-08-30 19:20:45,127 INFO L231 Difference]: Finished difference. Result has 130 places, 181 transitions, 2314 flow [2023-08-30 19:20:45,127 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=577, PETRI_DIFFERENCE_MINUEND_FLOW=1668, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2314, PETRI_PLACES=130, PETRI_TRANSITIONS=181} [2023-08-30 19:20:45,128 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 92 predicate places. [2023-08-30 19:20:45,128 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 181 transitions, 2314 flow [2023-08-30 19:20:45,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 240.6) internal successors, (2406), 10 states have internal predecessors, (2406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:20:45,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:20:45,128 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:20:45,133 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-30 19:20:45,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:20:45,329 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 19:20:45,329 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:20:45,329 INFO L85 PathProgramCache]: Analyzing trace with hash -168796839, now seen corresponding path program 3 times [2023-08-30 19:20:45,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:20:45,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323925647] [2023-08-30 19:20:45,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:20:45,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:20:45,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:20:45,569 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:20:45,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:20:45,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323925647] [2023-08-30 19:20:45,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323925647] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:20:45,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027749171] [2023-08-30 19:20:45,569 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 19:20:45,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:20:45,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:20:45,571 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) [2023-08-30 19:20:45,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-30 19:20:45,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 19:20:45,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:20:45,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-30 19:20:45,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:20:45,996 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:20:45,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:20:46,275 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:20:46,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027749171] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:20:46,275 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:20:46,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 24 [2023-08-30 19:20:46,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196163842] [2023-08-30 19:20:46,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:20:46,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-30 19:20:46,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:20:46,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-30 19:20:46,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2023-08-30 19:20:47,541 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 577 [2023-08-30 19:20:47,543 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 181 transitions, 2314 flow. Second operand has 26 states, 26 states have (on average 226.0) internal successors, (5876), 26 states have internal predecessors, (5876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:20:47,543 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:20:47,543 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 577 [2023-08-30 19:20:47,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:20:51,193 INFO L130 PetriNetUnfolder]: 9861/15132 cut-off events. [2023-08-30 19:20:51,193 INFO L131 PetriNetUnfolder]: For 55115/55149 co-relation queries the response was YES. [2023-08-30 19:20:51,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65118 conditions, 15132 events. 9861/15132 cut-off events. For 55115/55149 co-relation queries the response was YES. Maximal size of possible extension queue 696. Compared 96817 event pairs, 1435 based on Foata normal form. 386/14524 useless extension candidates. Maximal degree in co-relation 65091. Up to 1780 conditions per place. [2023-08-30 19:20:51,284 INFO L137 encePairwiseOnDemand]: 559/577 looper letters, 360 selfloop transitions, 164 changer transitions 502/1027 dead transitions. [2023-08-30 19:20:51,284 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 1027 transitions, 11330 flow [2023-08-30 19:20:51,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2023-08-30 19:20:51,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2023-08-30 19:20:51,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 13338 transitions. [2023-08-30 19:20:51,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4055459272097054 [2023-08-30 19:20:51,295 INFO L72 ComplementDD]: Start complementDD. Operand 57 states and 13338 transitions. [2023-08-30 19:20:51,295 INFO L73 IsDeterministic]: Start isDeterministic. Operand 57 states and 13338 transitions. [2023-08-30 19:20:51,297 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:20:51,298 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 57 states and 13338 transitions. [2023-08-30 19:20:51,308 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 58 states, 57 states have (on average 234.0) internal successors, (13338), 57 states have internal predecessors, (13338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:20:51,333 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 58 states, 58 states have (on average 577.0) internal successors, (33466), 58 states have internal predecessors, (33466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:20:51,337 INFO L81 ComplementDD]: Finished complementDD. Result has 58 states, 58 states have (on average 577.0) internal successors, (33466), 58 states have internal predecessors, (33466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:20:51,338 INFO L175 Difference]: Start difference. First operand has 130 places, 181 transitions, 2314 flow. Second operand 57 states and 13338 transitions. [2023-08-30 19:20:51,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 1027 transitions, 11330 flow [2023-08-30 19:20:51,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 1027 transitions, 10976 flow, removed 75 selfloop flow, removed 7 redundant places. [2023-08-30 19:20:51,681 INFO L231 Difference]: Finished difference. Result has 204 places, 274 transitions, 3893 flow [2023-08-30 19:20:51,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=577, PETRI_DIFFERENCE_MINUEND_FLOW=2229, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=57, PETRI_FLOW=3893, PETRI_PLACES=204, PETRI_TRANSITIONS=274} [2023-08-30 19:20:51,682 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 166 predicate places. [2023-08-30 19:20:51,682 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 274 transitions, 3893 flow [2023-08-30 19:20:51,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 226.0) internal successors, (5876), 26 states have internal predecessors, (5876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:20:51,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:20:51,683 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:20:51,691 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-30 19:20:51,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:20:51,889 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 19:20:51,889 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:20:51,890 INFO L85 PathProgramCache]: Analyzing trace with hash 584558231, now seen corresponding path program 1 times [2023-08-30 19:20:51,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:20:51,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037950826] [2023-08-30 19:20:51,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:20:51,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:20:51,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:20:52,024 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:20:52,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:20:52,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037950826] [2023-08-30 19:20:52,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037950826] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:20:52,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638075051] [2023-08-30 19:20:52,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:20:52,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:20:52,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:20:52,027 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) [2023-08-30 19:20:52,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-30 19:20:52,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:20:52,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 19:20:52,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:20:52,283 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:20:52,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:20:52,383 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:20:52,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638075051] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 19:20:52,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-30 19:20:52,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 14 [2023-08-30 19:20:52,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817116415] [2023-08-30 19:20:52,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:20:52,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 19:20:52,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:20:52,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 19:20:52,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-08-30 19:20:52,570 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 245 out of 577 [2023-08-30 19:20:52,571 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 274 transitions, 3893 flow. Second operand has 7 states, 7 states have (on average 249.0) internal successors, (1743), 7 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:20:52,571 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:20:52,571 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 245 of 577 [2023-08-30 19:20:52,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:20:53,678 INFO L130 PetriNetUnfolder]: 7401/11506 cut-off events. [2023-08-30 19:20:53,678 INFO L131 PetriNetUnfolder]: For 94593/94707 co-relation queries the response was YES. [2023-08-30 19:20:53,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55654 conditions, 11506 events. 7401/11506 cut-off events. For 94593/94707 co-relation queries the response was YES. Maximal size of possible extension queue 547. Compared 72290 event pairs, 2229 based on Foata normal form. 546/11517 useless extension candidates. Maximal degree in co-relation 55604. Up to 6984 conditions per place. [2023-08-30 19:20:53,767 INFO L137 encePairwiseOnDemand]: 569/577 looper letters, 349 selfloop transitions, 31 changer transitions 0/381 dead transitions. [2023-08-30 19:20:53,768 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 381 transitions, 6184 flow [2023-08-30 19:20:53,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 19:20:53,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 19:20:53,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1773 transitions. [2023-08-30 19:20:53,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43897004208962614 [2023-08-30 19:20:53,769 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1773 transitions. [2023-08-30 19:20:53,769 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1773 transitions. [2023-08-30 19:20:53,770 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:20:53,770 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1773 transitions. [2023-08-30 19:20:53,771 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 253.28571428571428) internal successors, (1773), 7 states have internal predecessors, (1773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:20:53,772 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 577.0) internal successors, (4616), 8 states have internal predecessors, (4616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:20:53,772 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 577.0) internal successors, (4616), 8 states have internal predecessors, (4616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:20:53,772 INFO L175 Difference]: Start difference. First operand has 204 places, 274 transitions, 3893 flow. Second operand 7 states and 1773 transitions. [2023-08-30 19:20:53,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 381 transitions, 6184 flow [2023-08-30 19:20:54,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 381 transitions, 5749 flow, removed 138 selfloop flow, removed 27 redundant places. [2023-08-30 19:20:54,158 INFO L231 Difference]: Finished difference. Result has 150 places, 275 transitions, 3844 flow [2023-08-30 19:20:54,158 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=577, PETRI_DIFFERENCE_MINUEND_FLOW=3626, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3844, PETRI_PLACES=150, PETRI_TRANSITIONS=275} [2023-08-30 19:20:54,158 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 112 predicate places. [2023-08-30 19:20:54,158 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 275 transitions, 3844 flow [2023-08-30 19:20:54,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 249.0) internal successors, (1743), 7 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:20:54,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:20:54,159 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:20:54,165 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-30 19:20:54,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2023-08-30 19:20:54,364 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 19:20:54,364 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:20:54,364 INFO L85 PathProgramCache]: Analyzing trace with hash -1542045553, now seen corresponding path program 1 times [2023-08-30 19:20:54,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:20:54,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909657577] [2023-08-30 19:20:54,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:20:54,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:20:54,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:20:54,578 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 19:20:54,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:20:54,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909657577] [2023-08-30 19:20:54,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909657577] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:20:54,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653308959] [2023-08-30 19:20:54,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:20:54,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:20:54,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:20:54,581 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) [2023-08-30 19:20:54,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-30 19:20:54,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:20:54,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-30 19:20:54,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:20:54,926 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 19:20:54,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:20:55,070 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 19:20:55,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653308959] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:20:55,070 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:20:55,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 15 [2023-08-30 19:20:55,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666896278] [2023-08-30 19:20:55,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:20:55,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-30 19:20:55,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:20:55,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-30 19:20:55,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2023-08-30 19:20:55,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 242 out of 577 [2023-08-30 19:20:55,740 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 275 transitions, 3844 flow. Second operand has 16 states, 16 states have (on average 246.625) internal successors, (3946), 16 states have internal predecessors, (3946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:20:55,740 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:20:55,740 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 242 of 577 [2023-08-30 19:20:55,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:20:58,305 INFO L130 PetriNetUnfolder]: 17105/26514 cut-off events. [2023-08-30 19:20:58,305 INFO L131 PetriNetUnfolder]: For 123259/123275 co-relation queries the response was YES. [2023-08-30 19:20:58,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122465 conditions, 26514 events. 17105/26514 cut-off events. For 123259/123275 co-relation queries the response was YES. Maximal size of possible extension queue 1227. Compared 187417 event pairs, 5356 based on Foata normal form. 34/26532 useless extension candidates. Maximal degree in co-relation 122435. Up to 7529 conditions per place. [2023-08-30 19:20:58,512 INFO L137 encePairwiseOnDemand]: 567/577 looper letters, 469 selfloop transitions, 217 changer transitions 142/829 dead transitions. [2023-08-30 19:20:58,512 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 829 transitions, 12492 flow [2023-08-30 19:20:58,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-30 19:20:58,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-30 19:20:58,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 3328 transitions. [2023-08-30 19:20:58,515 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4436741767764298 [2023-08-30 19:20:58,515 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 3328 transitions. [2023-08-30 19:20:58,515 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 3328 transitions. [2023-08-30 19:20:58,515 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:20:58,515 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 3328 transitions. [2023-08-30 19:20:58,517 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 256.0) internal successors, (3328), 13 states have internal predecessors, (3328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:20:58,520 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 577.0) internal successors, (8078), 14 states have internal predecessors, (8078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:20:58,520 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 577.0) internal successors, (8078), 14 states have internal predecessors, (8078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:20:58,520 INFO L175 Difference]: Start difference. First operand has 150 places, 275 transitions, 3844 flow. Second operand 13 states and 3328 transitions. [2023-08-30 19:20:58,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 829 transitions, 12492 flow [2023-08-30 19:20:59,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 829 transitions, 12421 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 19:20:59,036 INFO L231 Difference]: Finished difference. Result has 165 places, 383 transitions, 6043 flow [2023-08-30 19:20:59,036 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=577, PETRI_DIFFERENCE_MINUEND_FLOW=3811, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=6043, PETRI_PLACES=165, PETRI_TRANSITIONS=383} [2023-08-30 19:20:59,037 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 127 predicate places. [2023-08-30 19:20:59,037 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 383 transitions, 6043 flow [2023-08-30 19:20:59,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 246.625) internal successors, (3946), 16 states have internal predecessors, (3946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:20:59,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:20:59,037 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 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] [2023-08-30 19:20:59,045 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-30 19:20:59,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:20:59,238 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 19:20:59,238 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:20:59,239 INFO L85 PathProgramCache]: Analyzing trace with hash -1827772355, now seen corresponding path program 1 times [2023-08-30 19:20:59,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:20:59,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813987306] [2023-08-30 19:20:59,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:20:59,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:20:59,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:20:59,433 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:20:59,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:20:59,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813987306] [2023-08-30 19:20:59,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813987306] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:20:59,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989713678] [2023-08-30 19:20:59,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:20:59,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:20:59,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:20:59,435 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) [2023-08-30 19:20:59,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-30 19:20:59,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:20:59,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 19:20:59,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:20:59,761 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:20:59,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:20:59,917 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:20:59,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989713678] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:20:59,917 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:20:59,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2023-08-30 19:20:59,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730999434] [2023-08-30 19:20:59,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:20:59,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-30 19:20:59,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:20:59,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-30 19:20:59,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2023-08-30 19:21:00,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 245 out of 577 [2023-08-30 19:21:00,727 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 383 transitions, 6043 flow. Second operand has 22 states, 22 states have (on average 247.5909090909091) internal successors, (5447), 22 states have internal predecessors, (5447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:21:00,728 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:21:00,728 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 245 of 577 [2023-08-30 19:21:00,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:21:04,042 INFO L130 PetriNetUnfolder]: 18381/28179 cut-off events. [2023-08-30 19:21:04,042 INFO L131 PetriNetUnfolder]: For 175039/175123 co-relation queries the response was YES. [2023-08-30 19:21:04,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130704 conditions, 28179 events. 18381/28179 cut-off events. For 175039/175123 co-relation queries the response was YES. Maximal size of possible extension queue 1225. Compared 199789 event pairs, 3835 based on Foata normal form. 156/28311 useless extension candidates. Maximal degree in co-relation 130667. Up to 9270 conditions per place. [2023-08-30 19:21:04,372 INFO L137 encePairwiseOnDemand]: 567/577 looper letters, 874 selfloop transitions, 40 changer transitions 0/915 dead transitions. [2023-08-30 19:21:04,373 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 915 transitions, 15137 flow [2023-08-30 19:21:04,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-30 19:21:04,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-30 19:21:04,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 4615 transitions. [2023-08-30 19:21:04,376 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4443481609859426 [2023-08-30 19:21:04,376 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 4615 transitions. [2023-08-30 19:21:04,376 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 4615 transitions. [2023-08-30 19:21:04,377 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:21:04,377 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 4615 transitions. [2023-08-30 19:21:04,380 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 256.3888888888889) internal successors, (4615), 18 states have internal predecessors, (4615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:21:04,384 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 577.0) internal successors, (10963), 19 states have internal predecessors, (10963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:21:04,384 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 577.0) internal successors, (10963), 19 states have internal predecessors, (10963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:21:04,385 INFO L175 Difference]: Start difference. First operand has 165 places, 383 transitions, 6043 flow. Second operand 18 states and 4615 transitions. [2023-08-30 19:21:04,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 915 transitions, 15137 flow [2023-08-30 19:21:04,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 915 transitions, 14736 flow, removed 56 selfloop flow, removed 4 redundant places. [2023-08-30 19:21:04,860 INFO L231 Difference]: Finished difference. Result has 181 places, 408 transitions, 6348 flow [2023-08-30 19:21:04,860 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=577, PETRI_DIFFERENCE_MINUEND_FLOW=5852, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=383, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=6348, PETRI_PLACES=181, PETRI_TRANSITIONS=408} [2023-08-30 19:21:04,860 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 143 predicate places. [2023-08-30 19:21:04,860 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 408 transitions, 6348 flow [2023-08-30 19:21:04,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 247.5909090909091) internal successors, (5447), 22 states have internal predecessors, (5447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:21:04,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:21:04,861 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:21:04,867 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-30 19:21:05,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:21:05,068 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 19:21:05,068 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:21:05,068 INFO L85 PathProgramCache]: Analyzing trace with hash 1055410229, now seen corresponding path program 1 times [2023-08-30 19:21:05,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:21:05,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311856431] [2023-08-30 19:21:05,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:21:05,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:21:05,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:21:06,385 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:21:06,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:21:06,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311856431] [2023-08-30 19:21:06,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311856431] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:21:06,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631780379] [2023-08-30 19:21:06,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:21:06,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:21:06,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:21:06,387 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) [2023-08-30 19:21:06,389 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-30 19:21:06,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:21:06,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 58 conjunts are in the unsatisfiable core [2023-08-30 19:21:06,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:21:06,794 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 19:21:06,890 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 19:21:06,977 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 19:21:07,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 19:21:07,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 19:21:07,222 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-30 19:21:07,222 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 23 [2023-08-30 19:21:07,729 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:21:07,729 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 107 treesize of output 131 [2023-08-30 19:21:07,882 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:21:07,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:21:09,130 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:21:09,131 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 101 treesize of output 65 [2023-08-30 19:21:09,157 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:21:09,157 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 1675 treesize of output 1580 [2023-08-30 19:21:09,248 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:21:09,248 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1291 treesize of output 1267 [2023-08-30 19:21:09,299 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:21:09,300 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1014 treesize of output 894 [2023-08-30 19:21:09,354 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:21:09,355 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1115 treesize of output 1043 [2023-08-30 19:27:25,722 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:27:25,723 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 154 treesize of output 94 [2023-08-30 19:27:25,776 INFO L321 Elim1Store]: treesize reduction 15, result has 55.9 percent of original size [2023-08-30 19:27:25,777 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 28000 treesize of output 26354 [2023-08-30 19:27:26,174 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:27:26,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2336 treesize of output 2200 [2023-08-30 19:27:26,227 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:27:26,227 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1963 treesize of output 1731 [2023-08-30 19:27:26,292 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:27:26,293 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1920 treesize of output 1864 Killed by 15