./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/bench-exp2x3.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/bench-exp2x3.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 ebb6bba6491ab996b2a2d1f88baf86906cd5ba5ce7e0ad4dc20017ded9089a97 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-31 00:47:39,851 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-31 00:47:39,853 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-31 00:47:39,886 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-31 00:47:39,886 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-31 00:47:39,888 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-31 00:47:39,890 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-31 00:47:39,892 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-31 00:47:39,893 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-31 00:47:39,896 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-31 00:47:39,897 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-31 00:47:39,899 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-31 00:47:39,899 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-31 00:47:39,900 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-31 00:47:39,901 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-31 00:47:39,905 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-31 00:47:39,905 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-31 00:47:39,906 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-31 00:47:39,907 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-31 00:47:39,910 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-31 00:47:39,911 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-31 00:47:39,912 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-31 00:47:39,912 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-31 00:47:39,913 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-31 00:47:39,918 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-31 00:47:39,918 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-31 00:47:39,918 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-31 00:47:39,919 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-31 00:47:39,919 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-31 00:47:39,920 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-31 00:47:39,920 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-31 00:47:39,921 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-31 00:47:39,922 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-31 00:47:39,922 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-31 00:47:39,923 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-31 00:47:39,923 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-31 00:47:39,923 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-31 00:47:39,924 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-31 00:47:39,924 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-31 00:47:39,924 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-31 00:47:39,925 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-31 00:47:39,926 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-31 00:47:39,949 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-31 00:47:39,949 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-31 00:47:39,950 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-31 00:47:39,950 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-31 00:47:39,950 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-31 00:47:39,951 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-31 00:47:39,951 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-31 00:47:39,951 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-31 00:47:39,951 INFO L138 SettingsManager]: * Use SBE=true [2023-08-31 00:47:39,951 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-31 00:47:39,952 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-31 00:47:39,952 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-31 00:47:39,952 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-31 00:47:39,952 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-31 00:47:39,952 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-31 00:47:39,953 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-31 00:47:39,953 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-31 00:47:39,953 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-31 00:47:39,953 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-31 00:47:39,953 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-31 00:47:39,953 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-31 00:47:39,953 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-31 00:47:39,953 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-31 00:47:39,954 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-31 00:47:39,954 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 00:47:39,954 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-31 00:47:39,954 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-31 00:47:39,954 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-31 00:47:39,954 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-31 00:47:39,954 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-31 00:47:39,955 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-31 00:47:39,955 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-31 00:47:39,955 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-31 00:47:39,955 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-31 00:47:39,955 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-31 00:47:39,955 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ebb6bba6491ab996b2a2d1f88baf86906cd5ba5ce7e0ad4dc20017ded9089a97 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-31 00:47:40,174 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-31 00:47:40,187 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-31 00:47:40,188 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-31 00:47:40,189 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-31 00:47:40,189 INFO L275 PluginConnector]: CDTParser initialized [2023-08-31 00:47:40,190 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/bench-exp2x3.wvr.c [2023-08-31 00:47:41,145 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-31 00:47:41,302 INFO L351 CDTParser]: Found 1 translation units. [2023-08-31 00:47:41,303 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/bench-exp2x3.wvr.c [2023-08-31 00:47:41,309 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0566cfb39/df510f788a844c45ba09dfe9d4f15c13/FLAG049347be5 [2023-08-31 00:47:41,319 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0566cfb39/df510f788a844c45ba09dfe9d4f15c13 [2023-08-31 00:47:41,321 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-31 00:47:41,322 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-31 00:47:41,322 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-31 00:47:41,324 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-31 00:47:41,329 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-31 00:47:41,330 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 12:47:41" (1/1) ... [2023-08-31 00:47:41,331 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a683105 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:47:41, skipping insertion in model container [2023-08-31 00:47:41,331 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 12:47:41" (1/1) ... [2023-08-31 00:47:41,335 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-31 00:47:41,348 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-31 00:47:41,439 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/bench-exp2x3.wvr.c[2237,2250] [2023-08-31 00:47:41,442 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 00:47:41,450 INFO L203 MainTranslator]: Completed pre-run [2023-08-31 00:47:41,479 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/bench-exp2x3.wvr.c[2237,2250] [2023-08-31 00:47:41,480 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 00:47:41,494 INFO L208 MainTranslator]: Completed translation [2023-08-31 00:47:41,495 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:47:41 WrapperNode [2023-08-31 00:47:41,495 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-31 00:47:41,496 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-31 00:47:41,496 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-31 00:47:41,496 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-31 00:47:41,501 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:47:41" (1/1) ... [2023-08-31 00:47:41,514 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:47:41" (1/1) ... [2023-08-31 00:47:41,535 INFO L138 Inliner]: procedures = 20, calls = 32, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 96 [2023-08-31 00:47:41,535 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-31 00:47:41,536 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-31 00:47:41,537 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-31 00:47:41,537 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-31 00:47:41,542 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:47:41" (1/1) ... [2023-08-31 00:47:41,543 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:47:41" (1/1) ... [2023-08-31 00:47:41,547 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:47:41" (1/1) ... [2023-08-31 00:47:41,548 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:47:41" (1/1) ... [2023-08-31 00:47:41,560 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:47:41" (1/1) ... [2023-08-31 00:47:41,563 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:47:41" (1/1) ... [2023-08-31 00:47:41,589 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:47:41" (1/1) ... [2023-08-31 00:47:41,590 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:47:41" (1/1) ... [2023-08-31 00:47:41,604 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-31 00:47:41,613 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-31 00:47:41,613 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-31 00:47:41,613 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-31 00:47:41,615 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:47:41" (1/1) ... [2023-08-31 00:47:41,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 00:47:41,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:47:41,635 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-31 00:47:41,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-31 00:47:41,665 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-31 00:47:41,665 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-31 00:47:41,665 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-31 00:47:41,665 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-31 00:47:41,665 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-31 00:47:41,666 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-31 00:47:41,666 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-31 00:47:41,666 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-08-31 00:47:41,666 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-08-31 00:47:41,666 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-31 00:47:41,666 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-31 00:47:41,666 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-31 00:47:41,666 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-31 00:47:41,666 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-31 00:47:41,667 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-31 00:47:41,667 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-31 00:47:41,668 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-31 00:47:41,774 INFO L236 CfgBuilder]: Building ICFG [2023-08-31 00:47:41,775 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-31 00:47:41,929 INFO L277 CfgBuilder]: Performing block encoding [2023-08-31 00:47:41,934 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-31 00:47:41,934 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-31 00:47:41,935 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 12:47:41 BoogieIcfgContainer [2023-08-31 00:47:41,936 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-31 00:47:41,937 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-31 00:47:41,937 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-31 00:47:41,939 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-31 00:47:41,939 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.08 12:47:41" (1/3) ... [2023-08-31 00:47:41,940 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ad4627e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 12:47:41, skipping insertion in model container [2023-08-31 00:47:41,940 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:47:41" (2/3) ... [2023-08-31 00:47:41,940 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ad4627e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 12:47:41, skipping insertion in model container [2023-08-31 00:47:41,940 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 12:47:41" (3/3) ... [2023-08-31 00:47:41,941 INFO L112 eAbstractionObserver]: Analyzing ICFG bench-exp2x3.wvr.c [2023-08-31 00:47:41,946 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-31 00:47:41,951 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-31 00:47:41,952 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-31 00:47:41,952 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-31 00:47:42,027 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-31 00:47:42,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 126 places, 123 transitions, 278 flow [2023-08-31 00:47:42,131 INFO L130 PetriNetUnfolder]: 10/119 cut-off events. [2023-08-31 00:47:42,131 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-31 00:47:42,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 136 conditions, 119 events. 10/119 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 47 event pairs, 0 based on Foata normal form. 0/108 useless extension candidates. Maximal degree in co-relation 84. Up to 2 conditions per place. [2023-08-31 00:47:42,135 INFO L82 GeneralOperation]: Start removeDead. Operand has 126 places, 123 transitions, 278 flow [2023-08-31 00:47:42,138 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 110 places, 107 transitions, 238 flow [2023-08-31 00:47:42,140 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 00:47:42,156 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 110 places, 107 transitions, 238 flow [2023-08-31 00:47:42,159 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 110 places, 107 transitions, 238 flow [2023-08-31 00:47:42,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 110 places, 107 transitions, 238 flow [2023-08-31 00:47:42,186 INFO L130 PetriNetUnfolder]: 10/107 cut-off events. [2023-08-31 00:47:42,190 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-31 00:47:42,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124 conditions, 107 events. 10/107 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 46 event pairs, 0 based on Foata normal form. 0/97 useless extension candidates. Maximal degree in co-relation 84. Up to 2 conditions per place. [2023-08-31 00:47:42,193 INFO L119 LiptonReduction]: Number of co-enabled transitions 1224 [2023-08-31 00:47:45,155 INFO L134 LiptonReduction]: Checked pairs total: 1522 [2023-08-31 00:47:45,156 INFO L136 LiptonReduction]: Total number of compositions: 93 [2023-08-31 00:47:45,164 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-31 00:47:45,168 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;@3ecfaedd, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 00:47:45,168 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-08-31 00:47:45,172 INFO L130 PetriNetUnfolder]: 4/24 cut-off events. [2023-08-31 00:47:45,172 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-31 00:47:45,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:47:45,173 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] [2023-08-31 00:47:45,173 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 2 more)] === [2023-08-31 00:47:45,176 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:47:45,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1000817363, now seen corresponding path program 1 times [2023-08-31 00:47:45,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:47:45,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193265645] [2023-08-31 00:47:45,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:47:45,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:47:45,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:47:45,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:47:45,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:47:45,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193265645] [2023-08-31 00:47:45,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193265645] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 00:47:45,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 00:47:45,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-31 00:47:45,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626122628] [2023-08-31 00:47:45,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 00:47:45,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 00:47:45,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:47:45,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 00:47:45,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 00:47:45,635 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 216 [2023-08-31 00:47:45,637 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 25 transitions, 74 flow. Second operand has 3 states, 3 states have (on average 103.0) internal successors, (309), 3 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:47:45,637 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:47:45,637 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 216 [2023-08-31 00:47:45,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:47:45,729 INFO L130 PetriNetUnfolder]: 497/677 cut-off events. [2023-08-31 00:47:45,730 INFO L131 PetriNetUnfolder]: For 81/81 co-relation queries the response was YES. [2023-08-31 00:47:45,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1448 conditions, 677 events. 497/677 cut-off events. For 81/81 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1778 event pairs, 117 based on Foata normal form. 1/414 useless extension candidates. Maximal degree in co-relation 1016. Up to 471 conditions per place. [2023-08-31 00:47:45,734 INFO L137 encePairwiseOnDemand]: 210/216 looper letters, 41 selfloop transitions, 5 changer transitions 1/47 dead transitions. [2023-08-31 00:47:45,734 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 47 transitions, 233 flow [2023-08-31 00:47:45,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 00:47:45,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 00:47:45,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 336 transitions. [2023-08-31 00:47:45,743 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5185185185185185 [2023-08-31 00:47:45,743 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 336 transitions. [2023-08-31 00:47:45,743 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 336 transitions. [2023-08-31 00:47:45,744 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:47:45,746 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 336 transitions. [2023-08-31 00:47:45,748 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 112.0) internal successors, (336), 3 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:47:45,751 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:47:45,752 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:47:45,753 INFO L175 Difference]: Start difference. First operand has 34 places, 25 transitions, 74 flow. Second operand 3 states and 336 transitions. [2023-08-31 00:47:45,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 47 transitions, 233 flow [2023-08-31 00:47:45,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 47 transitions, 203 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-08-31 00:47:45,756 INFO L231 Difference]: Finished difference. Result has 29 places, 29 transitions, 91 flow [2023-08-31 00:47:45,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=91, PETRI_PLACES=29, PETRI_TRANSITIONS=29} [2023-08-31 00:47:45,759 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, -5 predicate places. [2023-08-31 00:47:45,760 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 29 transitions, 91 flow [2023-08-31 00:47:45,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 103.0) internal successors, (309), 3 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:47:45,760 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:47:45,760 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:47:45,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-31 00:47:45,761 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 2 more)] === [2023-08-31 00:47:45,761 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:47:45,761 INFO L85 PathProgramCache]: Analyzing trace with hash 1019366599, now seen corresponding path program 1 times [2023-08-31 00:47:45,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:47:45,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210048701] [2023-08-31 00:47:45,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:47:45,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:47:45,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:47:45,895 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:47:45,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:47:45,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210048701] [2023-08-31 00:47:45,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210048701] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 00:47:45,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 00:47:45,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 00:47:45,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847622438] [2023-08-31 00:47:45,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 00:47:45,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 00:47:45,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:47:45,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 00:47:45,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-31 00:47:45,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 216 [2023-08-31 00:47:45,925 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 29 transitions, 91 flow. Second operand has 4 states, 4 states have (on average 101.5) internal successors, (406), 4 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:47:45,925 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:47:45,926 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 216 [2023-08-31 00:47:45,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:47:46,066 INFO L130 PetriNetUnfolder]: 693/951 cut-off events. [2023-08-31 00:47:46,066 INFO L131 PetriNetUnfolder]: For 342/342 co-relation queries the response was YES. [2023-08-31 00:47:46,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2416 conditions, 951 events. 693/951 cut-off events. For 342/342 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2792 event pairs, 67 based on Foata normal form. 32/983 useless extension candidates. Maximal degree in co-relation 766. Up to 371 conditions per place. [2023-08-31 00:47:46,071 INFO L137 encePairwiseOnDemand]: 211/216 looper letters, 68 selfloop transitions, 10 changer transitions 0/78 dead transitions. [2023-08-31 00:47:46,071 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 78 transitions, 387 flow [2023-08-31 00:47:46,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 00:47:46,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 00:47:46,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 552 transitions. [2023-08-31 00:47:46,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5111111111111111 [2023-08-31 00:47:46,075 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 552 transitions. [2023-08-31 00:47:46,075 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 552 transitions. [2023-08-31 00:47:46,076 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:47:46,076 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 552 transitions. [2023-08-31 00:47:46,077 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 110.4) internal successors, (552), 5 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:47:46,080 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 216.0) internal successors, (1296), 6 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) [2023-08-31 00:47:46,080 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 216.0) internal successors, (1296), 6 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) [2023-08-31 00:47:46,081 INFO L175 Difference]: Start difference. First operand has 29 places, 29 transitions, 91 flow. Second operand 5 states and 552 transitions. [2023-08-31 00:47:46,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 78 transitions, 387 flow [2023-08-31 00:47:46,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 78 transitions, 379 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-31 00:47:46,083 INFO L231 Difference]: Finished difference. Result has 34 places, 36 transitions, 151 flow [2023-08-31 00:47:46,083 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=151, PETRI_PLACES=34, PETRI_TRANSITIONS=36} [2023-08-31 00:47:46,084 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 0 predicate places. [2023-08-31 00:47:46,084 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 36 transitions, 151 flow [2023-08-31 00:47:46,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 101.5) internal successors, (406), 4 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:47:46,084 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:47:46,084 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:47:46,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-31 00:47:46,085 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 2 more)] === [2023-08-31 00:47:46,086 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:47:46,087 INFO L85 PathProgramCache]: Analyzing trace with hash 539503439, now seen corresponding path program 1 times [2023-08-31 00:47:46,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:47:46,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398990810] [2023-08-31 00:47:46,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:47:46,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:47:46,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:47:46,208 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:47:46,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:47:46,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398990810] [2023-08-31 00:47:46,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398990810] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 00:47:46,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659896637] [2023-08-31 00:47:46,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:47:46,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:47:46,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:47:46,212 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 00:47:46,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-31 00:47:46,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:47:46,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-31 00:47:46,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 00:47:46,460 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:47:46,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 00:47:46,511 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:47:46,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659896637] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 00:47:46,515 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 00:47:46,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-08-31 00:47:46,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700332479] [2023-08-31 00:47:46,515 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 00:47:46,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-31 00:47:46,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:47:46,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-31 00:47:46,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-31 00:47:46,565 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 216 [2023-08-31 00:47:46,566 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 36 transitions, 151 flow. Second operand has 6 states, 6 states have (on average 100.83333333333333) internal successors, (605), 6 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:47:46,566 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:47:46,566 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 216 [2023-08-31 00:47:46,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:47:46,783 INFO L130 PetriNetUnfolder]: 1309/1809 cut-off events. [2023-08-31 00:47:46,783 INFO L131 PetriNetUnfolder]: For 1975/1975 co-relation queries the response was YES. [2023-08-31 00:47:46,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5608 conditions, 1809 events. 1309/1809 cut-off events. For 1975/1975 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 6397 event pairs, 291 based on Foata normal form. 68/1877 useless extension candidates. Maximal degree in co-relation 2898. Up to 757 conditions per place. [2023-08-31 00:47:46,791 INFO L137 encePairwiseOnDemand]: 211/216 looper letters, 98 selfloop transitions, 8 changer transitions 0/106 dead transitions. [2023-08-31 00:47:46,792 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 106 transitions, 641 flow [2023-08-31 00:47:46,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 00:47:46,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 00:47:46,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 562 transitions. [2023-08-31 00:47:46,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5203703703703704 [2023-08-31 00:47:46,794 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 562 transitions. [2023-08-31 00:47:46,794 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 562 transitions. [2023-08-31 00:47:46,794 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:47:46,794 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 562 transitions. [2023-08-31 00:47:46,795 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 112.4) internal successors, (562), 5 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:47:46,797 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 216.0) internal successors, (1296), 6 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) [2023-08-31 00:47:46,797 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 216.0) internal successors, (1296), 6 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) [2023-08-31 00:47:46,798 INFO L175 Difference]: Start difference. First operand has 34 places, 36 transitions, 151 flow. Second operand 5 states and 562 transitions. [2023-08-31 00:47:46,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 106 transitions, 641 flow [2023-08-31 00:47:46,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 106 transitions, 641 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-31 00:47:46,804 INFO L231 Difference]: Finished difference. Result has 41 places, 41 transitions, 206 flow [2023-08-31 00:47:46,804 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=151, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=206, PETRI_PLACES=41, PETRI_TRANSITIONS=41} [2023-08-31 00:47:46,805 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 7 predicate places. [2023-08-31 00:47:46,805 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 41 transitions, 206 flow [2023-08-31 00:47:46,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 100.83333333333333) internal successors, (605), 6 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:47:46,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:47:46,806 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:47:46,813 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-31 00:47:47,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:47:47,012 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 2 more)] === [2023-08-31 00:47:47,012 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:47:47,012 INFO L85 PathProgramCache]: Analyzing trace with hash -905361945, now seen corresponding path program 2 times [2023-08-31 00:47:47,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:47:47,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792920474] [2023-08-31 00:47:47,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:47:47,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:47:47,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:47:47,102 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:47:47,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:47:47,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792920474] [2023-08-31 00:47:47,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792920474] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 00:47:47,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 00:47:47,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 00:47:47,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245940567] [2023-08-31 00:47:47,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 00:47:47,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 00:47:47,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:47:47,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 00:47:47,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-31 00:47:47,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 216 [2023-08-31 00:47:47,140 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 41 transitions, 206 flow. Second operand has 4 states, 4 states have (on average 101.5) internal successors, (406), 4 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:47:47,140 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:47:47,140 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 216 [2023-08-31 00:47:47,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:47:47,299 INFO L130 PetriNetUnfolder]: 1105/1509 cut-off events. [2023-08-31 00:47:47,300 INFO L131 PetriNetUnfolder]: For 2593/2593 co-relation queries the response was YES. [2023-08-31 00:47:47,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5565 conditions, 1509 events. 1105/1509 cut-off events. For 2593/2593 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 5157 event pairs, 89 based on Foata normal form. 26/1535 useless extension candidates. Maximal degree in co-relation 3052. Up to 620 conditions per place. [2023-08-31 00:47:47,307 INFO L137 encePairwiseOnDemand]: 211/216 looper letters, 94 selfloop transitions, 11 changer transitions 0/105 dead transitions. [2023-08-31 00:47:47,307 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 105 transitions, 697 flow [2023-08-31 00:47:47,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 00:47:47,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 00:47:47,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 556 transitions. [2023-08-31 00:47:47,309 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5148148148148148 [2023-08-31 00:47:47,309 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 556 transitions. [2023-08-31 00:47:47,309 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 556 transitions. [2023-08-31 00:47:47,309 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:47:47,309 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 556 transitions. [2023-08-31 00:47:47,310 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 111.2) internal successors, (556), 5 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:47:47,312 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 216.0) internal successors, (1296), 6 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) [2023-08-31 00:47:47,312 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 216.0) internal successors, (1296), 6 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) [2023-08-31 00:47:47,312 INFO L175 Difference]: Start difference. First operand has 41 places, 41 transitions, 206 flow. Second operand 5 states and 556 transitions. [2023-08-31 00:47:47,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 105 transitions, 697 flow [2023-08-31 00:47:47,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 105 transitions, 697 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-31 00:47:47,319 INFO L231 Difference]: Finished difference. Result has 46 places, 46 transitions, 267 flow [2023-08-31 00:47:47,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=267, PETRI_PLACES=46, PETRI_TRANSITIONS=46} [2023-08-31 00:47:47,319 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 12 predicate places. [2023-08-31 00:47:47,319 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 46 transitions, 267 flow [2023-08-31 00:47:47,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 101.5) internal successors, (406), 4 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:47:47,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:47:47,320 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:47:47,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-31 00:47:47,320 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 2 more)] === [2023-08-31 00:47:47,321 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:47:47,321 INFO L85 PathProgramCache]: Analyzing trace with hash -114084107, now seen corresponding path program 1 times [2023-08-31 00:47:47,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:47:47,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203134086] [2023-08-31 00:47:47,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:47:47,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:47:47,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:47:47,409 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:47:47,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:47:47,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203134086] [2023-08-31 00:47:47,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203134086] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 00:47:47,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 00:47:47,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 00:47:47,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290804374] [2023-08-31 00:47:47,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 00:47:47,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 00:47:47,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:47:47,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 00:47:47,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-31 00:47:47,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 216 [2023-08-31 00:47:47,444 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 46 transitions, 267 flow. Second operand has 4 states, 4 states have (on average 101.5) internal successors, (406), 4 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:47:47,444 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:47:47,444 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 216 [2023-08-31 00:47:47,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:47:47,607 INFO L130 PetriNetUnfolder]: 1063/1467 cut-off events. [2023-08-31 00:47:47,607 INFO L131 PetriNetUnfolder]: For 3395/3395 co-relation queries the response was YES. [2023-08-31 00:47:47,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5790 conditions, 1467 events. 1063/1467 cut-off events. For 3395/3395 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 5166 event pairs, 83 based on Foata normal form. 42/1509 useless extension candidates. Maximal degree in co-relation 3213. Up to 619 conditions per place. [2023-08-31 00:47:47,613 INFO L137 encePairwiseOnDemand]: 211/216 looper letters, 93 selfloop transitions, 8 changer transitions 2/103 dead transitions. [2023-08-31 00:47:47,613 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 103 transitions, 710 flow [2023-08-31 00:47:47,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 00:47:47,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 00:47:47,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 555 transitions. [2023-08-31 00:47:47,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5138888888888888 [2023-08-31 00:47:47,615 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 555 transitions. [2023-08-31 00:47:47,615 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 555 transitions. [2023-08-31 00:47:47,615 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:47:47,615 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 555 transitions. [2023-08-31 00:47:47,616 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 111.0) internal successors, (555), 5 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:47:47,617 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 216.0) internal successors, (1296), 6 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) [2023-08-31 00:47:47,618 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 216.0) internal successors, (1296), 6 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) [2023-08-31 00:47:47,618 INFO L175 Difference]: Start difference. First operand has 46 places, 46 transitions, 267 flow. Second operand 5 states and 555 transitions. [2023-08-31 00:47:47,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 103 transitions, 710 flow [2023-08-31 00:47:47,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 103 transitions, 699 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-08-31 00:47:47,623 INFO L231 Difference]: Finished difference. Result has 50 places, 45 transitions, 270 flow [2023-08-31 00:47:47,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=270, PETRI_PLACES=50, PETRI_TRANSITIONS=45} [2023-08-31 00:47:47,624 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 16 predicate places. [2023-08-31 00:47:47,624 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 45 transitions, 270 flow [2023-08-31 00:47:47,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 101.5) internal successors, (406), 4 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:47:47,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:47:47,624 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:47:47,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-31 00:47:47,625 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 2 more)] === [2023-08-31 00:47:47,625 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:47:47,625 INFO L85 PathProgramCache]: Analyzing trace with hash 555709242, now seen corresponding path program 1 times [2023-08-31 00:47:47,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:47:47,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144332045] [2023-08-31 00:47:47,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:47:47,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:47:47,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:47:47,717 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:47:47,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:47:47,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144332045] [2023-08-31 00:47:47,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144332045] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 00:47:47,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468941600] [2023-08-31 00:47:47,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:47:47,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:47:47,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:47:47,722 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 00:47:47,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-31 00:47:47,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:47:47,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-31 00:47:47,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 00:47:47,971 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:47:47,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 00:47:48,011 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:47:48,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468941600] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 00:47:48,012 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 00:47:48,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-08-31 00:47:48,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709000338] [2023-08-31 00:47:48,012 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 00:47:48,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-31 00:47:48,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:47:48,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-31 00:47:48,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-31 00:47:48,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 216 [2023-08-31 00:47:48,078 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 45 transitions, 270 flow. Second operand has 6 states, 6 states have (on average 101.66666666666667) internal successors, (610), 6 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:47:48,078 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:47:48,078 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 216 [2023-08-31 00:47:48,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:47:48,295 INFO L130 PetriNetUnfolder]: 1407/1959 cut-off events. [2023-08-31 00:47:48,295 INFO L131 PetriNetUnfolder]: For 4939/4939 co-relation queries the response was YES. [2023-08-31 00:47:48,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8040 conditions, 1959 events. 1407/1959 cut-off events. For 4939/4939 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 7090 event pairs, 287 based on Foata normal form. 72/2031 useless extension candidates. Maximal degree in co-relation 4020. Up to 786 conditions per place. [2023-08-31 00:47:48,306 INFO L137 encePairwiseOnDemand]: 211/216 looper letters, 104 selfloop transitions, 10 changer transitions 0/114 dead transitions. [2023-08-31 00:47:48,306 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 114 transitions, 893 flow [2023-08-31 00:47:48,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 00:47:48,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 00:47:48,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 554 transitions. [2023-08-31 00:47:48,309 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.512962962962963 [2023-08-31 00:47:48,309 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 554 transitions. [2023-08-31 00:47:48,310 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 554 transitions. [2023-08-31 00:47:48,310 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:47:48,310 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 554 transitions. [2023-08-31 00:47:48,311 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 110.8) internal successors, (554), 5 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:47:48,312 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 216.0) internal successors, (1296), 6 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) [2023-08-31 00:47:48,312 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 216.0) internal successors, (1296), 6 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) [2023-08-31 00:47:48,312 INFO L175 Difference]: Start difference. First operand has 50 places, 45 transitions, 270 flow. Second operand 5 states and 554 transitions. [2023-08-31 00:47:48,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 114 transitions, 893 flow [2023-08-31 00:47:48,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 114 transitions, 860 flow, removed 8 selfloop flow, removed 1 redundant places. [2023-08-31 00:47:48,317 INFO L231 Difference]: Finished difference. Result has 55 places, 48 transitions, 315 flow [2023-08-31 00:47:48,317 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=259, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=315, PETRI_PLACES=55, PETRI_TRANSITIONS=48} [2023-08-31 00:47:48,319 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 21 predicate places. [2023-08-31 00:47:48,319 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 48 transitions, 315 flow [2023-08-31 00:47:48,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 101.66666666666667) internal successors, (610), 6 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:47:48,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:47:48,319 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:47:48,325 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-31 00:47:48,524 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,SelfDestructingSolverStorable5 [2023-08-31 00:47:48,524 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 2 more)] === [2023-08-31 00:47:48,524 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:47:48,525 INFO L85 PathProgramCache]: Analyzing trace with hash -1193580880, now seen corresponding path program 2 times [2023-08-31 00:47:48,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:47:48,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808757113] [2023-08-31 00:47:48,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:47:48,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:47:48,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:47:48,612 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:47:48,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:47:48,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808757113] [2023-08-31 00:47:48,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808757113] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 00:47:48,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 00:47:48,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 00:47:48,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074149279] [2023-08-31 00:47:48,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 00:47:48,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 00:47:48,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:47:48,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 00:47:48,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-31 00:47:48,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 216 [2023-08-31 00:47:48,638 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 48 transitions, 315 flow. Second operand has 4 states, 4 states have (on average 101.5) internal successors, (406), 4 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:47:48,638 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:47:48,638 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 216 [2023-08-31 00:47:48,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:47:48,796 INFO L130 PetriNetUnfolder]: 1237/1713 cut-off events. [2023-08-31 00:47:48,797 INFO L131 PetriNetUnfolder]: For 4450/4450 co-relation queries the response was YES. [2023-08-31 00:47:48,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7555 conditions, 1713 events. 1237/1713 cut-off events. For 4450/4450 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 6045 event pairs, 65 based on Foata normal form. 34/1747 useless extension candidates. Maximal degree in co-relation 5277. Up to 672 conditions per place. [2023-08-31 00:47:48,806 INFO L137 encePairwiseOnDemand]: 211/216 looper letters, 98 selfloop transitions, 9 changer transitions 4/111 dead transitions. [2023-08-31 00:47:48,806 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 111 transitions, 875 flow [2023-08-31 00:47:48,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 00:47:48,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 00:47:48,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 551 transitions. [2023-08-31 00:47:48,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5101851851851852 [2023-08-31 00:47:48,808 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 551 transitions. [2023-08-31 00:47:48,808 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 551 transitions. [2023-08-31 00:47:48,808 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:47:48,808 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 551 transitions. [2023-08-31 00:47:48,809 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 110.2) internal successors, (551), 5 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:47:48,810 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 216.0) internal successors, (1296), 6 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) [2023-08-31 00:47:48,810 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 216.0) internal successors, (1296), 6 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) [2023-08-31 00:47:48,810 INFO L175 Difference]: Start difference. First operand has 55 places, 48 transitions, 315 flow. Second operand 5 states and 551 transitions. [2023-08-31 00:47:48,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 111 transitions, 875 flow [2023-08-31 00:47:48,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 111 transitions, 866 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-31 00:47:48,819 INFO L231 Difference]: Finished difference. Result has 59 places, 47 transitions, 319 flow [2023-08-31 00:47:48,819 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=286, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=319, PETRI_PLACES=59, PETRI_TRANSITIONS=47} [2023-08-31 00:47:48,819 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 25 predicate places. [2023-08-31 00:47:48,819 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 47 transitions, 319 flow [2023-08-31 00:47:48,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 101.5) internal successors, (406), 4 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:47:48,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:47:48,820 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:47:48,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-31 00:47:48,820 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 2 more)] === [2023-08-31 00:47:48,820 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:47:48,820 INFO L85 PathProgramCache]: Analyzing trace with hash -1446487525, now seen corresponding path program 2 times [2023-08-31 00:47:48,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:47:48,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160938562] [2023-08-31 00:47:48,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:47:48,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:47:48,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:47:48,918 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:47:48,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:47:48,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160938562] [2023-08-31 00:47:48,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160938562] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 00:47:48,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887467156] [2023-08-31 00:47:48,919 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 00:47:48,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:47:48,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:47:48,920 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 00:47:48,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-31 00:47:49,001 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 00:47:49,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 00:47:49,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-31 00:47:49,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 00:47:49,090 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:47:49,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 00:47:49,148 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:47:49,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887467156] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 00:47:49,149 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 00:47:49,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-31 00:47:49,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280556257] [2023-08-31 00:47:49,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 00:47:49,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-31 00:47:49,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:47:49,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-31 00:47:49,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-08-31 00:47:49,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 216 [2023-08-31 00:47:49,232 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 47 transitions, 319 flow. Second operand has 7 states, 7 states have (on average 98.0) internal successors, (686), 7 states have internal predecessors, (686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:47:49,232 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:47:49,232 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 216 [2023-08-31 00:47:49,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:47:49,468 INFO L130 PetriNetUnfolder]: 1441/1985 cut-off events. [2023-08-31 00:47:49,469 INFO L131 PetriNetUnfolder]: For 5224/5224 co-relation queries the response was YES. [2023-08-31 00:47:49,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9185 conditions, 1985 events. 1441/1985 cut-off events. For 5224/5224 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 7183 event pairs, 129 based on Foata normal form. 68/2053 useless extension candidates. Maximal degree in co-relation 5914. Up to 1119 conditions per place. [2023-08-31 00:47:49,480 INFO L137 encePairwiseOnDemand]: 209/216 looper letters, 114 selfloop transitions, 10 changer transitions 3/127 dead transitions. [2023-08-31 00:47:49,480 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 127 transitions, 994 flow [2023-08-31 00:47:49,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 00:47:49,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 00:47:49,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 630 transitions. [2023-08-31 00:47:49,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4861111111111111 [2023-08-31 00:47:49,482 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 630 transitions. [2023-08-31 00:47:49,482 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 630 transitions. [2023-08-31 00:47:49,482 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:47:49,482 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 630 transitions. [2023-08-31 00:47:49,483 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 105.0) internal successors, (630), 6 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:47:49,484 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 216.0) internal successors, (1512), 7 states have internal predecessors, (1512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:47:49,485 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 216.0) internal successors, (1512), 7 states have internal predecessors, (1512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:47:49,485 INFO L175 Difference]: Start difference. First operand has 59 places, 47 transitions, 319 flow. Second operand 6 states and 630 transitions. [2023-08-31 00:47:49,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 127 transitions, 994 flow [2023-08-31 00:47:49,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 127 transitions, 985 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-31 00:47:49,491 INFO L231 Difference]: Finished difference. Result has 65 places, 50 transitions, 370 flow [2023-08-31 00:47:49,491 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=312, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=370, PETRI_PLACES=65, PETRI_TRANSITIONS=50} [2023-08-31 00:47:49,492 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 31 predicate places. [2023-08-31 00:47:49,492 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 50 transitions, 370 flow [2023-08-31 00:47:49,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 98.0) internal successors, (686), 7 states have internal predecessors, (686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:47:49,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:47:49,492 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:47:49,499 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-31 00:47:49,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:47:49,697 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 2 more)] === [2023-08-31 00:47:49,698 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:47:49,698 INFO L85 PathProgramCache]: Analyzing trace with hash -2141398155, now seen corresponding path program 2 times [2023-08-31 00:47:49,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:47:49,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439298949] [2023-08-31 00:47:49,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:47:49,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:47:49,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:47:49,787 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:47:49,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:47:49,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439298949] [2023-08-31 00:47:49,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439298949] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 00:47:49,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 00:47:49,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 00:47:49,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987104157] [2023-08-31 00:47:49,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 00:47:49,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 00:47:49,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:47:49,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 00:47:49,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-31 00:47:49,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 216 [2023-08-31 00:47:49,818 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 50 transitions, 370 flow. Second operand has 4 states, 4 states have (on average 101.5) internal successors, (406), 4 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:47:49,818 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:47:49,819 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 216 [2023-08-31 00:47:49,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:47:50,018 INFO L130 PetriNetUnfolder]: 1657/2269 cut-off events. [2023-08-31 00:47:50,018 INFO L131 PetriNetUnfolder]: For 8538/8538 co-relation queries the response was YES. [2023-08-31 00:47:50,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11206 conditions, 2269 events. 1657/2269 cut-off events. For 8538/8538 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 8107 event pairs, 481 based on Foata normal form. 68/2337 useless extension candidates. Maximal degree in co-relation 9738. Up to 1331 conditions per place. [2023-08-31 00:47:50,036 INFO L137 encePairwiseOnDemand]: 211/216 looper letters, 117 selfloop transitions, 8 changer transitions 0/125 dead transitions. [2023-08-31 00:47:50,036 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 125 transitions, 1158 flow [2023-08-31 00:47:50,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 00:47:50,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 00:47:50,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 552 transitions. [2023-08-31 00:47:50,038 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5111111111111111 [2023-08-31 00:47:50,038 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 552 transitions. [2023-08-31 00:47:50,038 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 552 transitions. [2023-08-31 00:47:50,039 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:47:50,039 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 552 transitions. [2023-08-31 00:47:50,040 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 110.4) internal successors, (552), 5 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:47:50,041 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 216.0) internal successors, (1296), 6 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) [2023-08-31 00:47:50,042 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 216.0) internal successors, (1296), 6 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) [2023-08-31 00:47:50,042 INFO L175 Difference]: Start difference. First operand has 65 places, 50 transitions, 370 flow. Second operand 5 states and 552 transitions. [2023-08-31 00:47:50,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 125 transitions, 1158 flow [2023-08-31 00:47:50,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 125 transitions, 1105 flow, removed 24 selfloop flow, removed 1 redundant places. [2023-08-31 00:47:50,053 INFO L231 Difference]: Finished difference. Result has 70 places, 53 transitions, 404 flow [2023-08-31 00:47:50,053 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=353, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=404, PETRI_PLACES=70, PETRI_TRANSITIONS=53} [2023-08-31 00:47:50,053 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 36 predicate places. [2023-08-31 00:47:50,054 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 53 transitions, 404 flow [2023-08-31 00:47:50,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 101.5) internal successors, (406), 4 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:47:50,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:47:50,054 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] [2023-08-31 00:47:50,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-31 00:47:50,055 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 2 more)] === [2023-08-31 00:47:50,055 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:47:50,055 INFO L85 PathProgramCache]: Analyzing trace with hash -567521946, now seen corresponding path program 1 times [2023-08-31 00:47:50,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:47:50,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332398307] [2023-08-31 00:47:50,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:47:50,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:47:50,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:47:50,494 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:47:50,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:47:50,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332398307] [2023-08-31 00:47:50,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332398307] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 00:47:50,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985999944] [2023-08-31 00:47:50,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:47:50,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:47:50,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:47:50,495 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 00:47:50,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-31 00:47:50,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:47:50,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-31 00:47:50,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 00:47:57,317 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:47:57,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 00:48:00,242 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:48:00,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985999944] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 00:48:00,242 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 00:48:00,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 12 [2023-08-31 00:48:00,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363257197] [2023-08-31 00:48:00,243 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 00:48:00,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-31 00:48:00,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:48:00,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-31 00:48:00,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=127, Unknown=1, NotChecked=0, Total=182 [2023-08-31 00:48:02,509 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 00:48:04,545 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 00:48:06,592 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 00:48:08,897 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 00:48:10,990 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 00:48:13,010 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 00:48:14,892 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 00:48:16,894 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 00:48:16,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 216 [2023-08-31 00:48:16,905 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 53 transitions, 404 flow. Second operand has 14 states, 14 states have (on average 89.42857142857143) internal successors, (1252), 14 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:48:16,905 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:48:16,905 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 216 [2023-08-31 00:48:16,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:48:20,805 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 00:48:28,439 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 00:48:35,303 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 00:48:36,977 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.63s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 00:48:40,493 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 00:48:43,052 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 00:48:45,068 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 00:48:47,492 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 00:48:49,623 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 00:48:57,558 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 00:48:59,567 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 00:49:02,056 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 00:49:03,864 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 00:49:07,277 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 00:49:09,894 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 00:49:11,900 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 00:49:13,906 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 00:49:17,572 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 00:49:19,493 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.92s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 00:49:22,476 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-31 00:49:27,057 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-31 00:49:29,419 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 00:49:32,163 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 00:49:32,251 INFO L130 PetriNetUnfolder]: 3081/4237 cut-off events. [2023-08-31 00:49:32,251 INFO L131 PetriNetUnfolder]: For 15477/15477 co-relation queries the response was YES. [2023-08-31 00:49:32,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22117 conditions, 4237 events. 3081/4237 cut-off events. For 15477/15477 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 17424 event pairs, 347 based on Foata normal form. 3/4240 useless extension candidates. Maximal degree in co-relation 19865. Up to 2358 conditions per place. [2023-08-31 00:49:32,272 INFO L137 encePairwiseOnDemand]: 199/216 looper letters, 215 selfloop transitions, 112 changer transitions 10/337 dead transitions. [2023-08-31 00:49:32,273 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 337 transitions, 2926 flow [2023-08-31 00:49:32,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-31 00:49:32,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-31 00:49:32,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1685 transitions. [2023-08-31 00:49:32,277 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45887799564270154 [2023-08-31 00:49:32,277 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1685 transitions. [2023-08-31 00:49:32,277 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1685 transitions. [2023-08-31 00:49:32,277 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:49:32,277 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1685 transitions. [2023-08-31 00:49:32,280 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 99.11764705882354) internal successors, (1685), 17 states have internal predecessors, (1685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:49:32,284 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 216.0) internal successors, (3888), 18 states have internal predecessors, (3888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:49:32,285 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 216.0) internal successors, (3888), 18 states have internal predecessors, (3888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:49:32,285 INFO L175 Difference]: Start difference. First operand has 70 places, 53 transitions, 404 flow. Second operand 17 states and 1685 transitions. [2023-08-31 00:49:32,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 337 transitions, 2926 flow [2023-08-31 00:49:32,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 337 transitions, 2760 flow, removed 56 selfloop flow, removed 2 redundant places. [2023-08-31 00:49:32,308 INFO L231 Difference]: Finished difference. Result has 92 places, 164 transitions, 1684 flow [2023-08-31 00:49:32,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=380, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1684, PETRI_PLACES=92, PETRI_TRANSITIONS=164} [2023-08-31 00:49:32,309 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 58 predicate places. [2023-08-31 00:49:32,309 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 164 transitions, 1684 flow [2023-08-31 00:49:32,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 89.42857142857143) internal successors, (1252), 14 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:49:32,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:49:32,310 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] [2023-08-31 00:49:32,315 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-31 00:49:32,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:49:32,515 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 2 more)] === [2023-08-31 00:49:32,516 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:49:32,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1310504207, now seen corresponding path program 1 times [2023-08-31 00:49:32,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:49:32,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413009581] [2023-08-31 00:49:32,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:49:32,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:49:32,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:49:32,878 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:49:32,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:49:32,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413009581] [2023-08-31 00:49:32,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413009581] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 00:49:32,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584380879] [2023-08-31 00:49:32,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:49:32,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:49:32,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:49:32,881 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 00:49:32,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-31 00:49:33,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:49:33,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-31 00:49:33,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 00:49:57,368 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:49:57,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 00:53:14,231 WARN L222 SmtUtils]: Spent 3.18m on a formula simplification. DAG size of input: 3055 DAG size of output: 3017 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) Killed by 15